FFmpeg  4.2.2
avcodec.h
Go to the documentation of this file.
1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_AVCODEC_H
22 #define AVCODEC_AVCODEC_H
23 
24 /**
25  * @file
26  * @ingroup libavc
27  * Libavcodec external API header
28  */
29 
30 #include <errno.h>
31 #include "libavutil/samplefmt.h"
32 #include "libavutil/attributes.h"
33 #include "libavutil/avutil.h"
34 #include "libavutil/buffer.h"
35 #include "libavutil/cpu.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/frame.h"
39 #include "libavutil/hwcontext.h"
40 #include "libavutil/log.h"
41 #include "libavutil/pixfmt.h"
42 #include "libavutil/rational.h"
43 
44 #include "version.h"
45 
46 /**
47  * @defgroup libavc libavcodec
48  * Encoding/Decoding Library
49  *
50  * @{
51  *
52  * @defgroup lavc_decoding Decoding
53  * @{
54  * @}
55  *
56  * @defgroup lavc_encoding Encoding
57  * @{
58  * @}
59  *
60  * @defgroup lavc_codec Codecs
61  * @{
62  * @defgroup lavc_codec_native Native Codecs
63  * @{
64  * @}
65  * @defgroup lavc_codec_wrappers External library wrappers
66  * @{
67  * @}
68  * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
69  * @{
70  * @}
71  * @}
72  * @defgroup lavc_internal Internal
73  * @{
74  * @}
75  * @}
76  */
77 
78 /**
79  * @ingroup libavc
80  * @defgroup lavc_encdec send/receive encoding and decoding API overview
81  * @{
82  *
83  * The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/
84  * avcodec_receive_packet() functions provide an encode/decode API, which
85  * decouples input and output.
86  *
87  * The API is very similar for encoding/decoding and audio/video, and works as
88  * follows:
89  * - Set up and open the AVCodecContext as usual.
90  * - Send valid input:
91  * - For decoding, call avcodec_send_packet() to give the decoder raw
92  * compressed data in an AVPacket.
93  * - For encoding, call avcodec_send_frame() to give the encoder an AVFrame
94  * containing uncompressed audio or video.
95  * In both cases, it is recommended that AVPackets and AVFrames are
96  * refcounted, or libavcodec might have to copy the input data. (libavformat
97  * always returns refcounted AVPackets, and av_frame_get_buffer() allocates
98  * refcounted AVFrames.)
99  * - Receive output in a loop. Periodically call one of the avcodec_receive_*()
100  * functions and process their output:
101  * - For decoding, call avcodec_receive_frame(). On success, it will return
102  * an AVFrame containing uncompressed audio or video data.
103  * - For encoding, call avcodec_receive_packet(). On success, it will return
104  * an AVPacket with a compressed frame.
105  * Repeat this call until it returns AVERROR(EAGAIN) or an error. The
106  * AVERROR(EAGAIN) return value means that new input data is required to
107  * return new output. In this case, continue with sending input. For each
108  * input frame/packet, the codec will typically return 1 output frame/packet,
109  * but it can also be 0 or more than 1.
110  *
111  * At the beginning of decoding or encoding, the codec might accept multiple
112  * input frames/packets without returning a frame, until its internal buffers
113  * are filled. This situation is handled transparently if you follow the steps
114  * outlined above.
115  *
116  * In theory, sending input can result in EAGAIN - this should happen only if
117  * not all output was received. You can use this to structure alternative decode
118  * or encode loops other than the one suggested above. For example, you could
119  * try sending new input on each iteration, and try to receive output if that
120  * returns EAGAIN.
121  *
122  * End of stream situations. These require "flushing" (aka draining) the codec,
123  * as the codec might buffer multiple frames or packets internally for
124  * performance or out of necessity (consider B-frames).
125  * This is handled as follows:
126  * - Instead of valid input, send NULL to the avcodec_send_packet() (decoding)
127  * or avcodec_send_frame() (encoding) functions. This will enter draining
128  * mode.
129  * - Call avcodec_receive_frame() (decoding) or avcodec_receive_packet()
130  * (encoding) in a loop until AVERROR_EOF is returned. The functions will
131  * not return AVERROR(EAGAIN), unless you forgot to enter draining mode.
132  * - Before decoding can be resumed again, the codec has to be reset with
133  * avcodec_flush_buffers().
134  *
135  * Using the API as outlined above is highly recommended. But it is also
136  * possible to call functions outside of this rigid schema. For example, you can
137  * call avcodec_send_packet() repeatedly without calling
138  * avcodec_receive_frame(). In this case, avcodec_send_packet() will succeed
139  * until the codec's internal buffer has been filled up (which is typically of
140  * size 1 per output frame, after initial input), and then reject input with
141  * AVERROR(EAGAIN). Once it starts rejecting input, you have no choice but to
142  * read at least some output.
143  *
144  * Not all codecs will follow a rigid and predictable dataflow; the only
145  * guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on
146  * one end implies that a receive/send call on the other end will succeed, or
147  * at least will not fail with AVERROR(EAGAIN). In general, no codec will
148  * permit unlimited buffering of input or output.
149  *
150  * This API replaces the following legacy functions:
151  * - avcodec_decode_video2() and avcodec_decode_audio4():
152  * Use avcodec_send_packet() to feed input to the decoder, then use
153  * avcodec_receive_frame() to receive decoded frames after each packet.
154  * Unlike with the old video decoding API, multiple frames might result from
155  * a packet. For audio, splitting the input packet into frames by partially
156  * decoding packets becomes transparent to the API user. You never need to
157  * feed an AVPacket to the API twice (unless it is rejected with AVERROR(EAGAIN) - then
158  * no data was read from the packet).
159  * Additionally, sending a flush/draining packet is required only once.
160  * - avcodec_encode_video2()/avcodec_encode_audio2():
161  * Use avcodec_send_frame() to feed input to the encoder, then use
162  * avcodec_receive_packet() to receive encoded packets.
163  * Providing user-allocated buffers for avcodec_receive_packet() is not
164  * possible.
165  * - The new API does not handle subtitles yet.
166  *
167  * Mixing new and old function calls on the same AVCodecContext is not allowed,
168  * and will result in undefined behavior.
169  *
170  * Some codecs might require using the new API; using the old API will return
171  * an error when calling it. All codecs support the new API.
172  *
173  * A codec is not allowed to return AVERROR(EAGAIN) for both sending and receiving. This
174  * would be an invalid state, which could put the codec user into an endless
175  * loop. The API has no concept of time either: it cannot happen that trying to
176  * do avcodec_send_packet() results in AVERROR(EAGAIN), but a repeated call 1 second
177  * later accepts the packet (with no other receive/flush API calls involved).
178  * The API is a strict state machine, and the passage of time is not supposed
179  * to influence it. Some timing-dependent behavior might still be deemed
180  * acceptable in certain cases. But it must never result in both send/receive
181  * returning EAGAIN at the same time at any point. It must also absolutely be
182  * avoided that the current state is "unstable" and can "flip-flop" between
183  * the send/receive APIs allowing progress. For example, it's not allowed that
184  * the codec randomly decides that it actually wants to consume a packet now
185  * instead of returning a frame, after it just returned AVERROR(EAGAIN) on an
186  * avcodec_send_packet() call.
187  * @}
188  */
189 
190 /**
191  * @defgroup lavc_core Core functions/structures.
192  * @ingroup libavc
193  *
194  * Basic definitions, functions for querying libavcodec capabilities,
195  * allocating core structures, etc.
196  * @{
197  */
198 
199 
200 /**
201  * Identify the syntax and semantics of the bitstream.
202  * The principle is roughly:
203  * Two decoders with the same ID can decode the same streams.
204  * Two encoders with the same ID can encode compatible streams.
205  * There may be slight deviations from the principle due to implementation
206  * details.
207  *
208  * If you add a codec ID to this list, add it so that
209  * 1. no value of an existing codec ID changes (that would break ABI),
210  * 2. it is as close as possible to similar codecs
211  *
212  * After adding new codec IDs, do not forget to add an entry to the codec
213  * descriptor list and bump libavcodec minor version.
214  */
215 enum AVCodecID {
217 
218  /* video codecs */
220  AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
355 #define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM
393 #define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC
414 
461 
462  /* various PCM "codecs" */
463  AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
495 
501 
502  /* various ADPCM codecs */
534 
546 
547  /* AMR */
550 
551  /* RealAudio codecs*/
554 
555  /* various DPCM codecs */
560 
563 
564  /* audio codecs */
565  AV_CODEC_ID_MP2 = 0x15000,
566  AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
583  AV_CODEC_ID_GSM, ///< as in Berlin toast format
595  AV_CODEC_ID_GSM_MS, /* as found in WAV */
633 
656 
657  /* subtitle codecs */
658  AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
661  AV_CODEC_ID_TEXT, ///< raw UTF-8 text
668 
686 
687  /* other specific kind of codecs (generally used for attachments) */
688  AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
689  AV_CODEC_ID_TTF = 0x18000,
690 
691  AV_CODEC_ID_SCTE_35, ///< Contain timestamp estimated through PCR of program stream.
700 
701 
702  AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
703 
704  AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
705  * stream (only used by libavformat) */
706  AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
707  * stream (only used by libavformat) */
708  AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
709  AV_CODEC_ID_WRAPPED_AVFRAME = 0x21001, ///< Passthrough codec, AVFrames wrapped in AVPacket
710 };
711 
712 /**
713  * This struct describes the properties of a single codec described by an
714  * AVCodecID.
715  * @see avcodec_descriptor_get()
716  */
717 typedef struct AVCodecDescriptor {
718  enum AVCodecID id;
720  /**
721  * Name of the codec described by this descriptor. It is non-empty and
722  * unique for each codec descriptor. It should contain alphanumeric
723  * characters and '_' only.
724  */
725  const char *name;
726  /**
727  * A more descriptive name for this codec. May be NULL.
728  */
729  const char *long_name;
730  /**
731  * Codec properties, a combination of AV_CODEC_PROP_* flags.
732  */
733  int props;
734  /**
735  * MIME type(s) associated with the codec.
736  * May be NULL; if not, a NULL-terminated array of MIME types.
737  * The first item is always non-NULL and is the preferred MIME type.
738  */
739  const char *const *mime_types;
740  /**
741  * If non-NULL, an array of profiles recognized for this codec.
742  * Terminated with FF_PROFILE_UNKNOWN.
743  */
744  const struct AVProfile *profiles;
746 
747 /**
748  * Codec uses only intra compression.
749  * Video and audio codecs only.
750  */
751 #define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
752 /**
753  * Codec supports lossy compression. Audio and video codecs only.
754  * @note a codec may support both lossy and lossless
755  * compression modes
756  */
757 #define AV_CODEC_PROP_LOSSY (1 << 1)
758 /**
759  * Codec supports lossless compression. Audio and video codecs only.
760  */
761 #define AV_CODEC_PROP_LOSSLESS (1 << 2)
762 /**
763  * Codec supports frame reordering. That is, the coded order (the order in which
764  * the encoded packets are output by the encoders / stored / input to the
765  * decoders) may be different from the presentation order of the corresponding
766  * frames.
767  *
768  * For codecs that do not have this property set, PTS and DTS should always be
769  * equal.
770  */
771 #define AV_CODEC_PROP_REORDER (1 << 3)
772 /**
773  * Subtitle codec is bitmap based
774  * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
775  */
776 #define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
777 /**
778  * Subtitle codec is text based.
779  * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
780  */
781 #define AV_CODEC_PROP_TEXT_SUB (1 << 17)
782 
783 /**
784  * @ingroup lavc_decoding
785  * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
786  * This is mainly needed because some optimized bitstream readers read
787  * 32 or 64 bit at once and could read over the end.<br>
788  * Note: If the first 23 bits of the additional bytes are not 0, then damaged
789  * MPEG bitstreams could cause overread and segfault.
790  */
791 #define AV_INPUT_BUFFER_PADDING_SIZE 64
792 
793 /**
794  * @ingroup lavc_encoding
795  * minimum encoding buffer size
796  * Used to avoid some checks during header writing.
797  */
798 #define AV_INPUT_BUFFER_MIN_SIZE 16384
799 
800 /**
801  * @ingroup lavc_decoding
802  */
804  /* We leave some space between them for extensions (drop some
805  * keyframes for intra-only or drop just some bidir frames). */
806  AVDISCARD_NONE =-16, ///< discard nothing
807  AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
808  AVDISCARD_NONREF = 8, ///< discard all non reference
809  AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
810  AVDISCARD_NONINTRA= 24, ///< discard all non intra frames
811  AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
812  AVDISCARD_ALL = 48, ///< discard all
813 };
814 
825  AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
826 };
827 
828 /**
829  * @ingroup lavc_encoding
830  */
831 typedef struct RcOverride{
834  int qscale; // If this is 0 then quality_factor will be used instead.
836 } RcOverride;
837 
838 /* encoding support
839  These flags can be passed in AVCodecContext.flags before initialization.
840  Note: Not everything is supported yet.
841 */
842 
843 /**
844  * Allow decoders to produce frames with data planes that are not aligned
845  * to CPU requirements (e.g. due to cropping).
846  */
847 #define AV_CODEC_FLAG_UNALIGNED (1 << 0)
848 /**
849  * Use fixed qscale.
850  */
851 #define AV_CODEC_FLAG_QSCALE (1 << 1)
852 /**
853  * 4 MV per MB allowed / advanced prediction for H.263.
854  */
855 #define AV_CODEC_FLAG_4MV (1 << 2)
856 /**
857  * Output even those frames that might be corrupted.
858  */
859 #define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3)
860 /**
861  * Use qpel MC.
862  */
863 #define AV_CODEC_FLAG_QPEL (1 << 4)
864 /**
865  * Don't output frames whose parameters differ from first
866  * decoded frame in stream.
867  */
868 #define AV_CODEC_FLAG_DROPCHANGED (1 << 5)
869 /**
870  * Use internal 2pass ratecontrol in first pass mode.
871  */
872 #define AV_CODEC_FLAG_PASS1 (1 << 9)
873 /**
874  * Use internal 2pass ratecontrol in second pass mode.
875  */
876 #define AV_CODEC_FLAG_PASS2 (1 << 10)
877 /**
878  * loop filter.
879  */
880 #define AV_CODEC_FLAG_LOOP_FILTER (1 << 11)
881 /**
882  * Only decode/encode grayscale.
883  */
884 #define AV_CODEC_FLAG_GRAY (1 << 13)
885 /**
886  * error[?] variables will be set during encoding.
887  */
888 #define AV_CODEC_FLAG_PSNR (1 << 15)
889 /**
890  * Input bitstream might be truncated at a random location
891  * instead of only at frame boundaries.
892  */
893 #define AV_CODEC_FLAG_TRUNCATED (1 << 16)
894 /**
895  * Use interlaced DCT.
896  */
897 #define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18)
898 /**
899  * Force low delay.
900  */
901 #define AV_CODEC_FLAG_LOW_DELAY (1 << 19)
902 /**
903  * Place global headers in extradata instead of every keyframe.
904  */
905 #define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22)
906 /**
907  * Use only bitexact stuff (except (I)DCT).
908  */
909 #define AV_CODEC_FLAG_BITEXACT (1 << 23)
910 /* Fx : Flag for H.263+ extra options */
911 /**
912  * H.263 advanced intra coding / MPEG-4 AC prediction
913  */
914 #define AV_CODEC_FLAG_AC_PRED (1 << 24)
915 /**
916  * interlaced motion estimation
917  */
918 #define AV_CODEC_FLAG_INTERLACED_ME (1 << 29)
919 #define AV_CODEC_FLAG_CLOSED_GOP (1U << 31)
920 
921 /**
922  * Allow non spec compliant speedup tricks.
923  */
924 #define AV_CODEC_FLAG2_FAST (1 << 0)
925 /**
926  * Skip bitstream encoding.
927  */
928 #define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2)
929 /**
930  * Place global headers at every keyframe instead of in extradata.
931  */
932 #define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3)
933 
934 /**
935  * timecode is in drop frame format. DEPRECATED!!!!
936  */
937 #define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE (1 << 13)
938 
939 /**
940  * Input bitstream might be truncated at a packet boundaries
941  * instead of only at frame boundaries.
942  */
943 #define AV_CODEC_FLAG2_CHUNKS (1 << 15)
944 /**
945  * Discard cropping information from SPS.
946  */
947 #define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16)
948 
949 /**
950  * Show all frames before the first keyframe
951  */
952 #define AV_CODEC_FLAG2_SHOW_ALL (1 << 22)
953 /**
954  * Export motion vectors through frame side data
955  */
956 #define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28)
957 /**
958  * Do not skip samples and export skip information as frame side data
959  */
960 #define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29)
961 /**
962  * Do not reset ASS ReadOrder field on flush (subtitles decoding)
963  */
964 #define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30)
965 
966 /* Unsupported options :
967  * Syntax Arithmetic coding (SAC)
968  * Reference Picture Selection
969  * Independent Segment Decoding */
970 /* /Fx */
971 /* codec capabilities */
972 
973 /**
974  * Decoder can use draw_horiz_band callback.
975  */
976 #define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0)
977 /**
978  * Codec uses get_buffer() for allocating buffers and supports custom allocators.
979  * If not set, it might not use get_buffer() at all or use operations that
980  * assume the buffer was allocated by avcodec_default_get_buffer.
981  */
982 #define AV_CODEC_CAP_DR1 (1 << 1)
983 #define AV_CODEC_CAP_TRUNCATED (1 << 3)
984 /**
985  * Encoder or decoder requires flushing with NULL input at the end in order to
986  * give the complete and correct output.
987  *
988  * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
989  * with NULL data. The user can still send NULL data to the public encode
990  * or decode function, but libavcodec will not pass it along to the codec
991  * unless this flag is set.
992  *
993  * Decoders:
994  * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
995  * avpkt->size=0 at the end to get the delayed data until the decoder no longer
996  * returns frames.
997  *
998  * Encoders:
999  * The encoder needs to be fed with NULL data at the end of encoding until the
1000  * encoder no longer returns data.
1001  *
1002  * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
1003  * flag also means that the encoder must set the pts and duration for
1004  * each output packet. If this flag is not set, the pts and duration will
1005  * be determined by libavcodec from the input frame.
1006  */
1007 #define AV_CODEC_CAP_DELAY (1 << 5)
1008 /**
1009  * Codec can be fed a final frame with a smaller size.
1010  * This can be used to prevent truncation of the last audio samples.
1011  */
1012 #define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6)
1013 
1014 /**
1015  * Codec can output multiple frames per AVPacket
1016  * Normally demuxers return one frame at a time, demuxers which do not do
1017  * are connected to a parser to split what they return into proper frames.
1018  * This flag is reserved to the very rare category of codecs which have a
1019  * bitstream that cannot be split into frames without timeconsuming
1020  * operations like full decoding. Demuxers carrying such bitstreams thus
1021  * may return multiple frames in a packet. This has many disadvantages like
1022  * prohibiting stream copy in many cases thus it should only be considered
1023  * as a last resort.
1024  */
1025 #define AV_CODEC_CAP_SUBFRAMES (1 << 8)
1026 /**
1027  * Codec is experimental and is thus avoided in favor of non experimental
1028  * encoders
1029  */
1030 #define AV_CODEC_CAP_EXPERIMENTAL (1 << 9)
1031 /**
1032  * Codec should fill in channel configuration and samplerate instead of container
1033  */
1034 #define AV_CODEC_CAP_CHANNEL_CONF (1 << 10)
1035 /**
1036  * Codec supports frame-level multithreading.
1037  */
1038 #define AV_CODEC_CAP_FRAME_THREADS (1 << 12)
1039 /**
1040  * Codec supports slice-based (or partition-based) multithreading.
1041  */
1042 #define AV_CODEC_CAP_SLICE_THREADS (1 << 13)
1043 /**
1044  * Codec supports changed parameters at any point.
1045  */
1046 #define AV_CODEC_CAP_PARAM_CHANGE (1 << 14)
1047 /**
1048  * Codec supports avctx->thread_count == 0 (auto).
1049  */
1050 #define AV_CODEC_CAP_AUTO_THREADS (1 << 15)
1051 /**
1052  * Audio encoder supports receiving a different number of samples in each call.
1053  */
1054 #define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
1055 /**
1056  * Decoder is not a preferred choice for probing.
1057  * This indicates that the decoder is not a good choice for probing.
1058  * It could for example be an expensive to spin up hardware decoder,
1059  * or it could simply not provide a lot of useful information about
1060  * the stream.
1061  * A decoder marked with this flag should only be used as last resort
1062  * choice for probing.
1063  */
1064 #define AV_CODEC_CAP_AVOID_PROBING (1 << 17)
1065 /**
1066  * Codec is intra only.
1067  */
1068 #define AV_CODEC_CAP_INTRA_ONLY 0x40000000
1069 /**
1070  * Codec is lossless.
1071  */
1072 #define AV_CODEC_CAP_LOSSLESS 0x80000000
1073 
1074 /**
1075  * Codec is backed by a hardware implementation. Typically used to
1076  * identify a non-hwaccel hardware decoder. For information about hwaccels, use
1077  * avcodec_get_hw_config() instead.
1078  */
1079 #define AV_CODEC_CAP_HARDWARE (1 << 18)
1080 
1081 /**
1082  * Codec is potentially backed by a hardware implementation, but not
1083  * necessarily. This is used instead of AV_CODEC_CAP_HARDWARE, if the
1084  * implementation provides some sort of internal fallback.
1085  */
1086 #define AV_CODEC_CAP_HYBRID (1 << 19)
1087 
1088 /**
1089  * This codec takes the reordered_opaque field from input AVFrames
1090  * and returns it in the corresponding field in AVCodecContext after
1091  * encoding.
1092  */
1093 #define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 20)
1094 
1095 /**
1096  * Pan Scan area.
1097  * This specifies the area which should be displayed.
1098  * Note there may be multiple such areas for one frame.
1099  */
1100 typedef struct AVPanScan {
1101  /**
1102  * id
1103  * - encoding: Set by user.
1104  * - decoding: Set by libavcodec.
1105  */
1106  int id;
1107 
1108  /**
1109  * width and height in 1/16 pel
1110  * - encoding: Set by user.
1111  * - decoding: Set by libavcodec.
1112  */
1113  int width;
1114  int height;
1115 
1116  /**
1117  * position of the top left corner in 1/16 pel for up to 3 fields/frames
1118  * - encoding: Set by user.
1119  * - decoding: Set by libavcodec.
1120  */
1121  int16_t position[3][2];
1122 } AVPanScan;
1123 
1124 /**
1125  * This structure describes the bitrate properties of an encoded bitstream. It
1126  * roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD
1127  * parameters for H.264/HEVC.
1128  */
1129 typedef struct AVCPBProperties {
1130  /**
1131  * Maximum bitrate of the stream, in bits per second.
1132  * Zero if unknown or unspecified.
1133  */
1134 #if FF_API_UNSANITIZED_BITRATES
1136 #else
1137  int64_t max_bitrate;
1138 #endif
1139  /**
1140  * Minimum bitrate of the stream, in bits per second.
1141  * Zero if unknown or unspecified.
1142  */
1143 #if FF_API_UNSANITIZED_BITRATES
1145 #else
1146  int64_t min_bitrate;
1147 #endif
1148  /**
1149  * Average bitrate of the stream, in bits per second.
1150  * Zero if unknown or unspecified.
1151  */
1152 #if FF_API_UNSANITIZED_BITRATES
1154 #else
1155  int64_t avg_bitrate;
1156 #endif
1157 
1158  /**
1159  * The size of the buffer to which the ratecontrol is applied, in bits.
1160  * Zero if unknown or unspecified.
1161  */
1163 
1164  /**
1165  * The delay between the time the packet this structure is associated with
1166  * is received and the time when it should be decoded, in periods of a 27MHz
1167  * clock.
1168  *
1169  * UINT64_MAX when unknown or unspecified.
1170  */
1171  uint64_t vbv_delay;
1172 } AVCPBProperties;
1173 
1174 /**
1175  * The decoder will keep a reference to the frame and may reuse it later.
1176  */
1177 #define AV_GET_BUFFER_FLAG_REF (1 << 0)
1178 
1179 /**
1180  * @defgroup lavc_packet AVPacket
1181  *
1182  * Types and functions for working with AVPacket.
1183  * @{
1184  */
1186  /**
1187  * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE
1188  * bytes worth of palette. This side data signals that a new palette is
1189  * present.
1190  */
1192 
1193  /**
1194  * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format
1195  * that the extradata buffer was changed and the receiving side should
1196  * act upon it appropriately. The new extradata is embedded in the side
1197  * data buffer and should be immediately used for processing the current
1198  * frame or packet.
1199  */
1201 
1202  /**
1203  * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
1204  * @code
1205  * u32le param_flags
1206  * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
1207  * s32le channel_count
1208  * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
1209  * u64le channel_layout
1210  * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
1211  * s32le sample_rate
1212  * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
1213  * s32le width
1214  * s32le height
1215  * @endcode
1216  */
1218 
1219  /**
1220  * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
1221  * structures with info about macroblocks relevant to splitting the
1222  * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
1223  * That is, it does not necessarily contain info about all macroblocks,
1224  * as long as the distance between macroblocks in the info is smaller
1225  * than the target payload size.
1226  * Each MB info structure is 12 bytes, and is laid out as follows:
1227  * @code
1228  * u32le bit offset from the start of the packet
1229  * u8 current quantizer at the start of the macroblock
1230  * u8 GOB number
1231  * u16le macroblock address within the GOB
1232  * u8 horizontal MV predictor
1233  * u8 vertical MV predictor
1234  * u8 horizontal MV predictor for block number 3
1235  * u8 vertical MV predictor for block number 3
1236  * @endcode
1237  */
1239 
1240  /**
1241  * This side data should be associated with an audio stream and contains
1242  * ReplayGain information in form of the AVReplayGain struct.
1243  */
1245 
1246  /**
1247  * This side data contains a 3x3 transformation matrix describing an affine
1248  * transformation that needs to be applied to the decoded video frames for
1249  * correct presentation.
1250  *
1251  * See libavutil/display.h for a detailed description of the data.
1252  */
1254 
1255  /**
1256  * This side data should be associated with a video stream and contains
1257  * Stereoscopic 3D information in form of the AVStereo3D struct.
1258  */
1260 
1261  /**
1262  * This side data should be associated with an audio stream and corresponds
1263  * to enum AVAudioServiceType.
1264  */
1266 
1267  /**
1268  * This side data contains quality related information from the encoder.
1269  * @code
1270  * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
1271  * u8 picture type
1272  * u8 error count
1273  * u16 reserved
1274  * u64le[error count] sum of squared differences between encoder in and output
1275  * @endcode
1276  */
1278 
1279  /**
1280  * This side data contains an integer value representing the stream index
1281  * of a "fallback" track. A fallback track indicates an alternate
1282  * track to use when the current track can not be decoded for some reason.
1283  * e.g. no decoder available for codec.
1284  */
1286 
1287  /**
1288  * This side data corresponds to the AVCPBProperties struct.
1289  */
1291 
1292  /**
1293  * Recommmends skipping the specified number of samples
1294  * @code
1295  * u32le number of samples to skip from start of this packet
1296  * u32le number of samples to skip from end of this packet
1297  * u8 reason for start skip
1298  * u8 reason for end skip (0=padding silence, 1=convergence)
1299  * @endcode
1300  */
1302 
1303  /**
1304  * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
1305  * the packet may contain "dual mono" audio specific to Japanese DTV
1306  * and if it is true, recommends only the selected channel to be used.
1307  * @code
1308  * u8 selected channels (0=mail/left, 1=sub/right, 2=both)
1309  * @endcode
1310  */
1312 
1313  /**
1314  * A list of zero terminated key/value strings. There is no end marker for
1315  * the list, so it is required to rely on the side data size to stop.
1316  */
1318 
1319  /**
1320  * Subtitle event position
1321  * @code
1322  * u32le x1
1323  * u32le y1
1324  * u32le x2
1325  * u32le y2
1326  * @endcode
1327  */
1329 
1330  /**
1331  * Data found in BlockAdditional element of matroska container. There is
1332  * no end marker for the data, so it is required to rely on the side data
1333  * size to recognize the end. 8 byte id (as found in BlockAddId) followed
1334  * by data.
1335  */
1337 
1338  /**
1339  * The optional first identifier line of a WebVTT cue.
1340  */
1342 
1343  /**
1344  * The optional settings (rendering instructions) that immediately
1345  * follow the timestamp specifier of a WebVTT cue.
1346  */
1348 
1349  /**
1350  * A list of zero terminated key/value strings. There is no end marker for
1351  * the list, so it is required to rely on the side data size to stop. This
1352  * side data includes updated metadata which appeared in the stream.
1353  */
1355 
1356  /**
1357  * MPEGTS stream ID as uint8_t, this is required to pass the stream ID
1358  * information from the demuxer to the corresponding muxer.
1359  */
1361 
1362  /**
1363  * Mastering display metadata (based on SMPTE-2086:2014). This metadata
1364  * should be associated with a video stream and contains data in the form
1365  * of the AVMasteringDisplayMetadata struct.
1366  */
1368 
1369  /**
1370  * This side data should be associated with a video stream and corresponds
1371  * to the AVSphericalMapping structure.
1372  */
1374 
1375  /**
1376  * Content light level (based on CTA-861.3). This metadata should be
1377  * associated with a video stream and contains data in the form of the
1378  * AVContentLightMetadata struct.
1379  */
1381 
1382  /**
1383  * ATSC A53 Part 4 Closed Captions. This metadata should be associated with
1384  * a video stream. A53 CC bitstream is stored as uint8_t in AVPacketSideData.data.
1385  * The number of bytes of CC data is AVPacketSideData.size.
1386  */
1388 
1389  /**
1390  * This side data is encryption initialization data.
1391  * The format is not part of ABI, use av_encryption_init_info_* methods to
1392  * access.
1393  */
1395 
1396  /**
1397  * This side data contains encryption info for how to decrypt the packet.
1398  * The format is not part of ABI, use av_encryption_info_* methods to access.
1399  */
1401 
1402  /**
1403  * Active Format Description data consisting of a single byte as specified
1404  * in ETSI TS 101 154 using AVActiveFormatDescription enum.
1405  */
1407 
1408  /**
1409  * The number of side data types.
1410  * This is not part of the public API/ABI in the sense that it may
1411  * change when new side data types are added.
1412  * This must stay the last enum value.
1413  * If its value becomes huge, some code using it
1414  * needs to be updated as it assumes it to be smaller than other limits.
1415  */
1417 };
1418 
1419 #define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
1420 
1421 typedef struct AVPacketSideData {
1422  uint8_t *data;
1423  int size;
1426 
1427 /**
1428  * This structure stores compressed data. It is typically exported by demuxers
1429  * and then passed as input to decoders, or received as output from encoders and
1430  * then passed to muxers.
1431  *
1432  * For video, it should typically contain one compressed frame. For audio it may
1433  * contain several compressed frames. Encoders are allowed to output empty
1434  * packets, with no compressed data, containing only side data
1435  * (e.g. to update some stream parameters at the end of encoding).
1436  *
1437  * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
1438  * ABI. Thus it may be allocated on stack and no new fields can be added to it
1439  * without libavcodec and libavformat major bump.
1440  *
1441  * The semantics of data ownership depends on the buf field.
1442  * If it is set, the packet data is dynamically allocated and is
1443  * valid indefinitely until a call to av_packet_unref() reduces the
1444  * reference count to 0.
1445  *
1446  * If the buf field is not set av_packet_ref() would make a copy instead
1447  * of increasing the reference count.
1448  *
1449  * The side data is always allocated with av_malloc(), copied by
1450  * av_packet_ref() and freed by av_packet_unref().
1451  *
1452  * @see av_packet_ref
1453  * @see av_packet_unref
1454  */
1455 typedef struct AVPacket {
1456  /**
1457  * A reference to the reference-counted buffer where the packet data is
1458  * stored.
1459  * May be NULL, then the packet data is not reference-counted.
1460  */
1462  /**
1463  * Presentation timestamp in AVStream->time_base units; the time at which
1464  * the decompressed packet will be presented to the user.
1465  * Can be AV_NOPTS_VALUE if it is not stored in the file.
1466  * pts MUST be larger or equal to dts as presentation cannot happen before
1467  * decompression, unless one wants to view hex dumps. Some formats misuse
1468  * the terms dts and pts/cts to mean something different. Such timestamps
1469  * must be converted to true pts/dts before they are stored in AVPacket.
1470  */
1471  int64_t pts;
1472  /**
1473  * Decompression timestamp in AVStream->time_base units; the time at which
1474  * the packet is decompressed.
1475  * Can be AV_NOPTS_VALUE if it is not stored in the file.
1476  */
1477  int64_t dts;
1478  uint8_t *data;
1479  int size;
1481  /**
1482  * A combination of AV_PKT_FLAG values
1483  */
1484  int flags;
1485  /**
1486  * Additional packet data that can be provided by the container.
1487  * Packet can contain several types of side information.
1488  */
1491 
1492  /**
1493  * Duration of this packet in AVStream->time_base units, 0 if unknown.
1494  * Equals next_pts - this_pts in presentation order.
1495  */
1496  int64_t duration;
1497 
1498  int64_t pos; ///< byte position in stream, -1 if unknown
1499 
1500 #if FF_API_CONVERGENCE_DURATION
1501  /**
1502  * @deprecated Same as the duration field, but as int64_t. This was required
1503  * for Matroska subtitles, whose duration values could overflow when the
1504  * duration field was still an int.
1505  */
1508 #endif
1509 } AVPacket;
1510 #define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
1511 #define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
1512 /**
1513  * Flag is used to discard packets which are required to maintain valid
1514  * decoder state but are not required for output and should be dropped
1515  * after decoding.
1516  **/
1517 #define AV_PKT_FLAG_DISCARD 0x0004
1518 /**
1519  * The packet comes from a trusted source.
1520  *
1521  * Otherwise-unsafe constructs such as arbitrary pointers to data
1522  * outside the packet may be followed.
1523  */
1524 #define AV_PKT_FLAG_TRUSTED 0x0008
1525 /**
1526  * Flag is used to indicate packets that contain frames that can
1527  * be discarded by the decoder. I.e. Non-reference frames.
1528  */
1529 #define AV_PKT_FLAG_DISPOSABLE 0x0010
1530 
1531 
1537 };
1538 /**
1539  * @}
1540  */
1541 
1542 struct AVCodecInternal;
1543 
1547  AV_FIELD_TT, //< Top coded_first, top displayed first
1548  AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1549  AV_FIELD_TB, //< Top coded first, bottom displayed first
1550  AV_FIELD_BT, //< Bottom coded first, top displayed first
1551 };
1552 
1553 /**
1554  * main external API structure.
1555  * New fields can be added to the end with minor version bumps.
1556  * Removal, reordering and changes to existing fields require a major
1557  * version bump.
1558  * You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user
1559  * applications.
1560  * The name string for AVOptions options matches the associated command line
1561  * parameter name and can be found in libavcodec/options_table.h
1562  * The AVOption/command line parameter names differ in some cases from the C
1563  * structure field names for historic reasons or brevity.
1564  * sizeof(AVCodecContext) must not be used outside libav*.
1565  */
1566 typedef struct AVCodecContext {
1567  /**
1568  * information on struct for av_log
1569  * - set by avcodec_alloc_context3
1570  */
1573 
1574  enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1575  const struct AVCodec *codec;
1576  enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
1577 
1578  /**
1579  * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1580  * This is used to work around some encoder bugs.
1581  * A demuxer should set this to what is stored in the field used to identify the codec.
1582  * If there are multiple such fields in a container then the demuxer should choose the one
1583  * which maximizes the information about the used codec.
1584  * If the codec tag field in a container is larger than 32 bits then the demuxer should
1585  * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1586  * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1587  * first.
1588  * - encoding: Set by user, if not then the default based on codec_id will be used.
1589  * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1590  */
1591  unsigned int codec_tag;
1592 
1593  void *priv_data;
1594 
1595  /**
1596  * Private context used for internal data.
1597  *
1598  * Unlike priv_data, this is not codec-specific. It is used in general
1599  * libavcodec functions.
1600  */
1601  struct AVCodecInternal *internal;
1602 
1603  /**
1604  * Private data of the user, can be used to carry app specific stuff.
1605  * - encoding: Set by user.
1606  * - decoding: Set by user.
1607  */
1608  void *opaque;
1609 
1610  /**
1611  * the average bitrate
1612  * - encoding: Set by user; unused for constant quantizer encoding.
1613  * - decoding: Set by user, may be overwritten by libavcodec
1614  * if this info is available in the stream
1615  */
1616  int64_t bit_rate;
1617 
1618  /**
1619  * number of bits the bitstream is allowed to diverge from the reference.
1620  * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1621  * - encoding: Set by user; unused for constant quantizer encoding.
1622  * - decoding: unused
1623  */
1625 
1626  /**
1627  * Global quality for codecs which cannot change it per frame.
1628  * This should be proportional to MPEG-1/2/4 qscale.
1629  * - encoding: Set by user.
1630  * - decoding: unused
1631  */
1633 
1634  /**
1635  * - encoding: Set by user.
1636  * - decoding: unused
1637  */
1639 #define FF_COMPRESSION_DEFAULT -1
1640 
1641  /**
1642  * AV_CODEC_FLAG_*.
1643  * - encoding: Set by user.
1644  * - decoding: Set by user.
1645  */
1646  int flags;
1647 
1648  /**
1649  * AV_CODEC_FLAG2_*
1650  * - encoding: Set by user.
1651  * - decoding: Set by user.
1652  */
1653  int flags2;
1654 
1655  /**
1656  * some codecs need / can use extradata like Huffman tables.
1657  * MJPEG: Huffman tables
1658  * rv10: additional flags
1659  * MPEG-4: global headers (they can be in the bitstream or here)
1660  * The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger
1661  * than extradata_size to avoid problems if it is read with the bitstream reader.
1662  * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1663  * Must be allocated with the av_malloc() family of functions.
1664  * - encoding: Set/allocated/freed by libavcodec.
1665  * - decoding: Set/allocated/freed by user.
1666  */
1667  uint8_t *extradata;
1669 
1670  /**
1671  * This is the fundamental unit of time (in seconds) in terms
1672  * of which frame timestamps are represented. For fixed-fps content,
1673  * timebase should be 1/framerate and timestamp increments should be
1674  * identically 1.
1675  * This often, but not always is the inverse of the frame rate or field rate
1676  * for video. 1/time_base is not the average frame rate if the frame rate is not
1677  * constant.
1678  *
1679  * Like containers, elementary streams also can store timestamps, 1/time_base
1680  * is the unit in which these timestamps are specified.
1681  * As example of such codec time base see ISO/IEC 14496-2:2001(E)
1682  * vop_time_increment_resolution and fixed_vop_rate
1683  * (fixed_vop_rate == 0 implies that it is different from the framerate)
1684  *
1685  * - encoding: MUST be set by user.
1686  * - decoding: the use of this field for decoding is deprecated.
1687  * Use framerate instead.
1688  */
1690 
1691  /**
1692  * For some codecs, the time base is closer to the field rate than the frame rate.
1693  * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
1694  * if no telecine is used ...
1695  *
1696  * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
1697  */
1699 
1700  /**
1701  * Codec delay.
1702  *
1703  * Encoding: Number of frames delay there will be from the encoder input to
1704  * the decoder output. (we assume the decoder matches the spec)
1705  * Decoding: Number of frames delay in addition to what a standard decoder
1706  * as specified in the spec would produce.
1707  *
1708  * Video:
1709  * Number of frames the decoded output will be delayed relative to the
1710  * encoded input.
1711  *
1712  * Audio:
1713  * For encoding, this field is unused (see initial_padding).
1714  *
1715  * For decoding, this is the number of samples the decoder needs to
1716  * output before the decoder's output is valid. When seeking, you should
1717  * start decoding this many samples prior to your desired seek point.
1718  *
1719  * - encoding: Set by libavcodec.
1720  * - decoding: Set by libavcodec.
1721  */
1722  int delay;
1723 
1724 
1725  /* video only */
1726  /**
1727  * picture width / height.
1728  *
1729  * @note Those fields may not match the values of the last
1730  * AVFrame output by avcodec_decode_video2 due frame
1731  * reordering.
1732  *
1733  * - encoding: MUST be set by user.
1734  * - decoding: May be set by the user before opening the decoder if known e.g.
1735  * from the container. Some decoders will require the dimensions
1736  * to be set by the caller. During decoding, the decoder may
1737  * overwrite those values as required while parsing the data.
1738  */
1740 
1741  /**
1742  * Bitstream width / height, may be different from width/height e.g. when
1743  * the decoded frame is cropped before being output or lowres is enabled.
1744  *
1745  * @note Those field may not match the value of the last
1746  * AVFrame output by avcodec_receive_frame() due frame
1747  * reordering.
1748  *
1749  * - encoding: unused
1750  * - decoding: May be set by the user before opening the decoder if known
1751  * e.g. from the container. During decoding, the decoder may
1752  * overwrite those values as required while parsing the data.
1753  */
1755 
1756  /**
1757  * the number of pictures in a group of pictures, or 0 for intra_only
1758  * - encoding: Set by user.
1759  * - decoding: unused
1760  */
1762 
1763  /**
1764  * Pixel format, see AV_PIX_FMT_xxx.
1765  * May be set by the demuxer if known from headers.
1766  * May be overridden by the decoder if it knows better.
1767  *
1768  * @note This field may not match the value of the last
1769  * AVFrame output by avcodec_receive_frame() due frame
1770  * reordering.
1771  *
1772  * - encoding: Set by user.
1773  * - decoding: Set by user if known, overridden by libavcodec while
1774  * parsing the data.
1775  */
1777 
1778  /**
1779  * If non NULL, 'draw_horiz_band' is called by the libavcodec
1780  * decoder to draw a horizontal band. It improves cache usage. Not
1781  * all codecs can do that. You must check the codec capabilities
1782  * beforehand.
1783  * When multithreading is used, it may be called from multiple threads
1784  * at the same time; threads might draw different parts of the same AVFrame,
1785  * or multiple AVFrames, and there is no guarantee that slices will be drawn
1786  * in order.
1787  * The function is also used by hardware acceleration APIs.
1788  * It is called at least once during frame decoding to pass
1789  * the data needed for hardware render.
1790  * In that mode instead of pixel data, AVFrame points to
1791  * a structure specific to the acceleration API. The application
1792  * reads the structure and can change some fields to indicate progress
1793  * or mark state.
1794  * - encoding: unused
1795  * - decoding: Set by user.
1796  * @param height the height of the slice
1797  * @param y the y position of the slice
1798  * @param type 1->top field, 2->bottom field, 3->frame
1799  * @param offset offset into the AVFrame.data from which the slice should be read
1800  */
1801  void (*draw_horiz_band)(struct AVCodecContext *s,
1802  const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
1803  int y, int type, int height);
1804 
1805  /**
1806  * callback to negotiate the pixelFormat
1807  * @param fmt is the list of formats which are supported by the codec,
1808  * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1809  * The first is always the native one.
1810  * @note The callback may be called again immediately if initialization for
1811  * the selected (hardware-accelerated) pixel format failed.
1812  * @warning Behavior is undefined if the callback returns a value not
1813  * in the fmt list of formats.
1814  * @return the chosen format
1815  * - encoding: unused
1816  * - decoding: Set by user, if not set the native format will be chosen.
1817  */
1818  enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
1819 
1820  /**
1821  * maximum number of B-frames between non-B-frames
1822  * Note: The output will be delayed by max_b_frames+1 relative to the input.
1823  * - encoding: Set by user.
1824  * - decoding: unused
1825  */
1827 
1828  /**
1829  * qscale factor between IP and B-frames
1830  * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1831  * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1832  * - encoding: Set by user.
1833  * - decoding: unused
1834  */
1836 
1837 #if FF_API_PRIVATE_OPT
1838  /** @deprecated use encoder private options instead */
1841 #endif
1842 
1843  /**
1844  * qscale offset between IP and B-frames
1845  * - encoding: Set by user.
1846  * - decoding: unused
1847  */
1849 
1850  /**
1851  * Size of the frame reordering buffer in the decoder.
1852  * For MPEG-2 it is 1 IPB or 0 low delay IP.
1853  * - encoding: Set by libavcodec.
1854  * - decoding: Set by libavcodec.
1855  */
1857 
1858 #if FF_API_PRIVATE_OPT
1859  /** @deprecated use encoder private options instead */
1862 #endif
1863 
1864  /**
1865  * qscale factor between P- and I-frames
1866  * If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset).
1867  * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1868  * - encoding: Set by user.
1869  * - decoding: unused
1870  */
1872 
1873  /**
1874  * qscale offset between P and I-frames
1875  * - encoding: Set by user.
1876  * - decoding: unused
1877  */
1879 
1880  /**
1881  * luminance masking (0-> disabled)
1882  * - encoding: Set by user.
1883  * - decoding: unused
1884  */
1886 
1887  /**
1888  * temporary complexity masking (0-> disabled)
1889  * - encoding: Set by user.
1890  * - decoding: unused
1891  */
1893 
1894  /**
1895  * spatial complexity masking (0-> disabled)
1896  * - encoding: Set by user.
1897  * - decoding: unused
1898  */
1900 
1901  /**
1902  * p block masking (0-> disabled)
1903  * - encoding: Set by user.
1904  * - decoding: unused
1905  */
1906  float p_masking;
1907 
1908  /**
1909  * darkness masking (0-> disabled)
1910  * - encoding: Set by user.
1911  * - decoding: unused
1912  */
1914 
1915  /**
1916  * slice count
1917  * - encoding: Set by libavcodec.
1918  * - decoding: Set by user (or 0).
1919  */
1921 
1922 #if FF_API_PRIVATE_OPT
1923  /** @deprecated use encoder private options instead */
1926 #define FF_PRED_LEFT 0
1927 #define FF_PRED_PLANE 1
1928 #define FF_PRED_MEDIAN 2
1929 #endif
1930 
1931  /**
1932  * slice offsets in the frame in bytes
1933  * - encoding: Set/allocated by libavcodec.
1934  * - decoding: Set/allocated by user (or NULL).
1935  */
1937 
1938  /**
1939  * sample aspect ratio (0 if unknown)
1940  * That is the width of a pixel divided by the height of the pixel.
1941  * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1942  * - encoding: Set by user.
1943  * - decoding: Set by libavcodec.
1944  */
1946 
1947  /**
1948  * motion estimation comparison function
1949  * - encoding: Set by user.
1950  * - decoding: unused
1951  */
1952  int me_cmp;
1953  /**
1954  * subpixel motion estimation comparison function
1955  * - encoding: Set by user.
1956  * - decoding: unused
1957  */
1959  /**
1960  * macroblock comparison function (not supported yet)
1961  * - encoding: Set by user.
1962  * - decoding: unused
1963  */
1964  int mb_cmp;
1965  /**
1966  * interlaced DCT comparison function
1967  * - encoding: Set by user.
1968  * - decoding: unused
1969  */
1971 #define FF_CMP_SAD 0
1972 #define FF_CMP_SSE 1
1973 #define FF_CMP_SATD 2
1974 #define FF_CMP_DCT 3
1975 #define FF_CMP_PSNR 4
1976 #define FF_CMP_BIT 5
1977 #define FF_CMP_RD 6
1978 #define FF_CMP_ZERO 7
1979 #define FF_CMP_VSAD 8
1980 #define FF_CMP_VSSE 9
1981 #define FF_CMP_NSSE 10
1982 #define FF_CMP_W53 11
1983 #define FF_CMP_W97 12
1984 #define FF_CMP_DCTMAX 13
1985 #define FF_CMP_DCT264 14
1986 #define FF_CMP_MEDIAN_SAD 15
1987 #define FF_CMP_CHROMA 256
1988 
1989  /**
1990  * ME diamond size & shape
1991  * - encoding: Set by user.
1992  * - decoding: unused
1993  */
1995 
1996  /**
1997  * amount of previous MV predictors (2a+1 x 2a+1 square)
1998  * - encoding: Set by user.
1999  * - decoding: unused
2000  */
2002 
2003 #if FF_API_PRIVATE_OPT
2004  /** @deprecated use encoder private options instead */
2006  int pre_me;
2007 #endif
2008 
2009  /**
2010  * motion estimation prepass comparison function
2011  * - encoding: Set by user.
2012  * - decoding: unused
2013  */
2015 
2016  /**
2017  * ME prepass diamond size & shape
2018  * - encoding: Set by user.
2019  * - decoding: unused
2020  */
2022 
2023  /**
2024  * subpel ME quality
2025  * - encoding: Set by user.
2026  * - decoding: unused
2027  */
2029 
2030  /**
2031  * maximum motion estimation search range in subpel units
2032  * If 0 then no limit.
2033  *
2034  * - encoding: Set by user.
2035  * - decoding: unused
2036  */
2038 
2039  /**
2040  * slice flags
2041  * - encoding: unused
2042  * - decoding: Set by user.
2043  */
2045 #define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
2046 #define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG-2 field pics)
2047 #define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2048 
2049  /**
2050  * macroblock decision mode
2051  * - encoding: Set by user.
2052  * - decoding: unused
2053  */
2055 #define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
2056 #define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
2057 #define FF_MB_DECISION_RD 2 ///< rate distortion
2058 
2059  /**
2060  * custom intra quantization matrix
2061  * Must be allocated with the av_malloc() family of functions, and will be freed in
2062  * avcodec_free_context().
2063  * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
2064  * - decoding: Set/allocated/freed by libavcodec.
2065  */
2066  uint16_t *intra_matrix;
2067 
2068  /**
2069  * custom inter quantization matrix
2070  * Must be allocated with the av_malloc() family of functions, and will be freed in
2071  * avcodec_free_context().
2072  * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
2073  * - decoding: Set/allocated/freed by libavcodec.
2074  */
2075  uint16_t *inter_matrix;
2076 
2077 #if FF_API_PRIVATE_OPT
2078  /** @deprecated use encoder private options instead */
2081 
2082  /** @deprecated use encoder private options instead */
2085 #endif
2086 
2087  /**
2088  * precision of the intra DC coefficient - 8
2089  * - encoding: Set by user.
2090  * - decoding: Set by libavcodec
2091  */
2093 
2094  /**
2095  * Number of macroblock rows at the top which are skipped.
2096  * - encoding: unused
2097  * - decoding: Set by user.
2098  */
2100 
2101  /**
2102  * Number of macroblock rows at the bottom which are skipped.
2103  * - encoding: unused
2104  * - decoding: Set by user.
2105  */
2107 
2108  /**
2109  * minimum MB Lagrange multiplier
2110  * - encoding: Set by user.
2111  * - decoding: unused
2112  */
2113  int mb_lmin;
2114 
2115  /**
2116  * maximum MB Lagrange multiplier
2117  * - encoding: Set by user.
2118  * - decoding: unused
2119  */
2120  int mb_lmax;
2121 
2122 #if FF_API_PRIVATE_OPT
2123  /**
2124  * @deprecated use encoder private options instead
2125  */
2128 #endif
2129 
2130  /**
2131  * - encoding: Set by user.
2132  * - decoding: unused
2133  */
2135 
2136 #if FF_API_PRIVATE_OPT
2137  /** @deprecated use encoder private options instead */
2140 #endif
2141 
2142  /**
2143  * minimum GOP size
2144  * - encoding: Set by user.
2145  * - decoding: unused
2146  */
2148 
2149  /**
2150  * number of reference frames
2151  * - encoding: Set by user.
2152  * - decoding: Set by lavc.
2153  */
2154  int refs;
2155 
2156 #if FF_API_PRIVATE_OPT
2157  /** @deprecated use encoder private options instead */
2160 #endif
2161 
2162  /**
2163  * Note: Value depends upon the compare function used for fullpel ME.
2164  * - encoding: Set by user.
2165  * - decoding: unused
2166  */
2168 
2169 #if FF_API_PRIVATE_OPT
2170  /** @deprecated use encoder private options instead */
2173 #endif
2174 
2175  /**
2176  * Chromaticity coordinates of the source primaries.
2177  * - encoding: Set by user
2178  * - decoding: Set by libavcodec
2179  */
2181 
2182  /**
2183  * Color Transfer Characteristic.
2184  * - encoding: Set by user
2185  * - decoding: Set by libavcodec
2186  */
2188 
2189  /**
2190  * YUV colorspace type.
2191  * - encoding: Set by user
2192  * - decoding: Set by libavcodec
2193  */
2195 
2196  /**
2197  * MPEG vs JPEG YUV range.
2198  * - encoding: Set by user
2199  * - decoding: Set by libavcodec
2200  */
2202 
2203  /**
2204  * This defines the location of chroma samples.
2205  * - encoding: Set by user
2206  * - decoding: Set by libavcodec
2207  */
2209 
2210  /**
2211  * Number of slices.
2212  * Indicates number of picture subdivisions. Used for parallelized
2213  * decoding.
2214  * - encoding: Set by user
2215  * - decoding: unused
2216  */
2217  int slices;
2218 
2219  /** Field order
2220  * - encoding: set by libavcodec
2221  * - decoding: Set by user.
2222  */
2224 
2225  /* audio only */
2226  int sample_rate; ///< samples per second
2227  int channels; ///< number of audio channels
2228 
2229  /**
2230  * audio sample format
2231  * - encoding: Set by user.
2232  * - decoding: Set by libavcodec.
2233  */
2234  enum AVSampleFormat sample_fmt; ///< sample format
2235 
2236  /* The following data should not be initialized. */
2237  /**
2238  * Number of samples per channel in an audio frame.
2239  *
2240  * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
2241  * except the last must contain exactly frame_size samples per channel.
2242  * May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
2243  * frame size is not restricted.
2244  * - decoding: may be set by some decoders to indicate constant frame size
2245  */
2247 
2248  /**
2249  * Frame counter, set by libavcodec.
2250  *
2251  * - decoding: total number of frames returned from the decoder so far.
2252  * - encoding: total number of frames passed to the encoder so far.
2253  *
2254  * @note the counter is not incremented if encoding/decoding resulted in
2255  * an error.
2256  */
2258 
2259  /**
2260  * number of bytes per packet if constant and known or 0
2261  * Used by some WAV based audio codecs.
2262  */
2264 
2265  /**
2266  * Audio cutoff bandwidth (0 means "automatic")
2267  * - encoding: Set by user.
2268  * - decoding: unused
2269  */
2270  int cutoff;
2271 
2272  /**
2273  * Audio channel layout.
2274  * - encoding: set by user.
2275  * - decoding: set by user, may be overwritten by libavcodec.
2276  */
2277  uint64_t channel_layout;
2278 
2279  /**
2280  * Request decoder to use this channel layout if it can (0 for default)
2281  * - encoding: unused
2282  * - decoding: Set by user.
2283  */
2285 
2286  /**
2287  * Type of service that the audio stream conveys.
2288  * - encoding: Set by user.
2289  * - decoding: Set by libavcodec.
2290  */
2292 
2293  /**
2294  * desired sample format
2295  * - encoding: Not used.
2296  * - decoding: Set by user.
2297  * Decoder will decode to this format if it can.
2298  */
2300 
2301  /**
2302  * This callback is called at the beginning of each frame to get data
2303  * buffer(s) for it. There may be one contiguous buffer for all the data or
2304  * there may be a buffer per each data plane or anything in between. What
2305  * this means is, you may set however many entries in buf[] you feel necessary.
2306  * Each buffer must be reference-counted using the AVBuffer API (see description
2307  * of buf[] below).
2308  *
2309  * The following fields will be set in the frame before this callback is
2310  * called:
2311  * - format
2312  * - width, height (video only)
2313  * - sample_rate, channel_layout, nb_samples (audio only)
2314  * Their values may differ from the corresponding values in
2315  * AVCodecContext. This callback must use the frame values, not the codec
2316  * context values, to calculate the required buffer size.
2317  *
2318  * This callback must fill the following fields in the frame:
2319  * - data[]
2320  * - linesize[]
2321  * - extended_data:
2322  * * if the data is planar audio with more than 8 channels, then this
2323  * callback must allocate and fill extended_data to contain all pointers
2324  * to all data planes. data[] must hold as many pointers as it can.
2325  * extended_data must be allocated with av_malloc() and will be freed in
2326  * av_frame_unref().
2327  * * otherwise extended_data must point to data
2328  * - buf[] must contain one or more pointers to AVBufferRef structures. Each of
2329  * the frame's data and extended_data pointers must be contained in these. That
2330  * is, one AVBufferRef for each allocated chunk of memory, not necessarily one
2331  * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
2332  * and av_buffer_ref().
2333  * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
2334  * this callback and filled with the extra buffers if there are more
2335  * buffers than buf[] can hold. extended_buf will be freed in
2336  * av_frame_unref().
2337  *
2338  * If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call
2339  * avcodec_default_get_buffer2() instead of providing buffers allocated by
2340  * some other means.
2341  *
2342  * Each data plane must be aligned to the maximum required by the target
2343  * CPU.
2344  *
2345  * @see avcodec_default_get_buffer2()
2346  *
2347  * Video:
2348  *
2349  * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
2350  * (read and/or written to if it is writable) later by libavcodec.
2351  *
2352  * avcodec_align_dimensions2() should be used to find the required width and
2353  * height, as they normally need to be rounded up to the next multiple of 16.
2354  *
2355  * Some decoders do not support linesizes changing between frames.
2356  *
2357  * If frame multithreading is used and thread_safe_callbacks is set,
2358  * this callback may be called from a different thread, but not from more
2359  * than one at once. Does not need to be reentrant.
2360  *
2361  * @see avcodec_align_dimensions2()
2362  *
2363  * Audio:
2364  *
2365  * Decoders request a buffer of a particular size by setting
2366  * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
2367  * however, utilize only part of the buffer by setting AVFrame.nb_samples
2368  * to a smaller value in the output frame.
2369  *
2370  * As a convenience, av_samples_get_buffer_size() and
2371  * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
2372  * functions to find the required data size and to fill data pointers and
2373  * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
2374  * since all planes must be the same size.
2375  *
2376  * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
2377  *
2378  * - encoding: unused
2379  * - decoding: Set by libavcodec, user can override.
2380  */
2381  int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
2382 
2383  /**
2384  * If non-zero, the decoded audio and video frames returned from
2385  * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
2386  * and are valid indefinitely. The caller must free them with
2387  * av_frame_unref() when they are not needed anymore.
2388  * Otherwise, the decoded frames must not be freed by the caller and are
2389  * only valid until the next decode call.
2390  *
2391  * This is always automatically enabled if avcodec_receive_frame() is used.
2392  *
2393  * - encoding: unused
2394  * - decoding: set by the caller before avcodec_open2().
2395  */
2398 
2399  /* - encoding parameters */
2400  float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2401  float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
2402 
2403  /**
2404  * minimum quantizer
2405  * - encoding: Set by user.
2406  * - decoding: unused
2407  */
2408  int qmin;
2409 
2410  /**
2411  * maximum quantizer
2412  * - encoding: Set by user.
2413  * - decoding: unused
2414  */
2415  int qmax;
2416 
2417  /**
2418  * maximum quantizer difference between frames
2419  * - encoding: Set by user.
2420  * - decoding: unused
2421  */
2423 
2424  /**
2425  * decoder bitstream buffer size
2426  * - encoding: Set by user.
2427  * - decoding: unused
2428  */
2430 
2431  /**
2432  * ratecontrol override, see RcOverride
2433  * - encoding: Allocated/set/freed by user.
2434  * - decoding: unused
2435  */
2438 
2439  /**
2440  * maximum bitrate
2441  * - encoding: Set by user.
2442  * - decoding: Set by user, may be overwritten by libavcodec.
2443  */
2444  int64_t rc_max_rate;
2445 
2446  /**
2447  * minimum bitrate
2448  * - encoding: Set by user.
2449  * - decoding: unused
2450  */
2451  int64_t rc_min_rate;
2452 
2453  /**
2454  * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2455  * - encoding: Set by user.
2456  * - decoding: unused.
2457  */
2459 
2460  /**
2461  * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2462  * - encoding: Set by user.
2463  * - decoding: unused.
2464  */
2466 
2467  /**
2468  * Number of bits which should be loaded into the rc buffer before decoding starts.
2469  * - encoding: Set by user.
2470  * - decoding: unused
2471  */
2473 
2474 #if FF_API_CODER_TYPE
2475 #define FF_CODER_TYPE_VLC 0
2476 #define FF_CODER_TYPE_AC 1
2477 #define FF_CODER_TYPE_RAW 2
2478 #define FF_CODER_TYPE_RLE 3
2479  /**
2480  * @deprecated use encoder private options instead
2481  */
2484 #endif /* FF_API_CODER_TYPE */
2485 
2486 #if FF_API_PRIVATE_OPT
2487  /** @deprecated use encoder private options instead */
2490 #endif
2491 
2492 #if FF_API_PRIVATE_OPT
2493  /** @deprecated use encoder private options instead */
2496 
2497  /** @deprecated use encoder private options instead */
2500 
2501  /** @deprecated use encoder private options instead */
2504 
2505  /** @deprecated use encoder private options instead */
2508 #endif /* FF_API_PRIVATE_OPT */
2509 
2510  /**
2511  * trellis RD quantization
2512  * - encoding: Set by user.
2513  * - decoding: unused
2514  */
2515  int trellis;
2516 
2517 #if FF_API_PRIVATE_OPT
2518  /** @deprecated use encoder private options instead */
2521 
2522  /** @deprecated use encoder private options instead */
2525 
2526  /** @deprecated use encoder private options instead */
2529 #endif
2530 
2531 #if FF_API_RTP_CALLBACK
2532  /**
2533  * @deprecated unused
2534  */
2535  /* The RTP callback: This function is called */
2536  /* every time the encoder has a packet to send. */
2537  /* It depends on the encoder if the data starts */
2538  /* with a Start Code (it should). H.263 does. */
2539  /* mb_nb contains the number of macroblocks */
2540  /* encoded in the RTP payload. */
2542  void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2543 #endif
2544 
2545 #if FF_API_PRIVATE_OPT
2546  /** @deprecated use encoder private options instead */
2548  int rtp_payload_size; /* The size of the RTP payload: the coder will */
2549  /* do its best to deliver a chunk with size */
2550  /* below rtp_payload_size, the chunk will start */
2551  /* with a start code on some codecs like H.263. */
2552  /* This doesn't take account of any particular */
2553  /* headers inside the transmitted RTP payload. */
2554 #endif
2555 
2556 #if FF_API_STAT_BITS
2557  /* statistics, used for 2-pass encoding */
2559  int mv_bits;
2567  int i_count;
2569  int p_count;
2574 
2575  /** @deprecated this field is unused */
2578 #endif
2579 
2580  /**
2581  * pass1 encoding statistics output buffer
2582  * - encoding: Set by libavcodec.
2583  * - decoding: unused
2584  */
2585  char *stats_out;
2586 
2587  /**
2588  * pass2 encoding statistics input buffer
2589  * Concatenated stuff from stats_out of pass1 should be placed here.
2590  * - encoding: Allocated/set/freed by user.
2591  * - decoding: unused
2592  */
2593  char *stats_in;
2594 
2595  /**
2596  * Work around bugs in encoders which sometimes cannot be detected automatically.
2597  * - encoding: Set by user
2598  * - decoding: Set by user
2599  */
2601 #define FF_BUG_AUTODETECT 1 ///< autodetection
2602 #define FF_BUG_XVID_ILACE 4
2603 #define FF_BUG_UMP4 8
2604 #define FF_BUG_NO_PADDING 16
2605 #define FF_BUG_AMV 32
2606 #define FF_BUG_QPEL_CHROMA 64
2607 #define FF_BUG_STD_QPEL 128
2608 #define FF_BUG_QPEL_CHROMA2 256
2609 #define FF_BUG_DIRECT_BLOCKSIZE 512
2610 #define FF_BUG_EDGE 1024
2611 #define FF_BUG_HPEL_CHROMA 2048
2612 #define FF_BUG_DC_CLIP 4096
2613 #define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2614 #define FF_BUG_TRUNCATED 16384
2615 #define FF_BUG_IEDGE 32768
2616 
2617  /**
2618  * strictly follow the standard (MPEG-4, ...).
2619  * - encoding: Set by user.
2620  * - decoding: Set by user.
2621  * Setting this to STRICT or higher means the encoder and decoder will
2622  * generally do stupid things, whereas setting it to unofficial or lower
2623  * will mean the encoder might produce output that is not supported by all
2624  * spec-compliant decoders. Decoders don't differentiate between normal,
2625  * unofficial and experimental (that is, they always try to decode things
2626  * when they can) unless they are explicitly asked to behave stupidly
2627  * (=strictly conform to the specs)
2628  */
2630 #define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2631 #define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2632 #define FF_COMPLIANCE_NORMAL 0
2633 #define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2634 #define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
2635 
2636  /**
2637  * error concealment flags
2638  * - encoding: unused
2639  * - decoding: Set by user.
2640  */
2642 #define FF_EC_GUESS_MVS 1
2643 #define FF_EC_DEBLOCK 2
2644 #define FF_EC_FAVOR_INTER 256
2645 
2646  /**
2647  * debug
2648  * - encoding: Set by user.
2649  * - decoding: Set by user.
2650  */
2651  int debug;
2652 #define FF_DEBUG_PICT_INFO 1
2653 #define FF_DEBUG_RC 2
2654 #define FF_DEBUG_BITSTREAM 4
2655 #define FF_DEBUG_MB_TYPE 8
2656 #define FF_DEBUG_QP 16
2657 #if FF_API_DEBUG_MV
2658 /**
2659  * @deprecated this option does nothing
2660  */
2661 #define FF_DEBUG_MV 32
2662 #endif
2663 #define FF_DEBUG_DCT_COEFF 0x00000040
2664 #define FF_DEBUG_SKIP 0x00000080
2665 #define FF_DEBUG_STARTCODE 0x00000100
2666 #define FF_DEBUG_ER 0x00000400
2667 #define FF_DEBUG_MMCO 0x00000800
2668 #define FF_DEBUG_BUGS 0x00001000
2669 #if FF_API_DEBUG_MV
2670 #define FF_DEBUG_VIS_QP 0x00002000
2671 #define FF_DEBUG_VIS_MB_TYPE 0x00004000
2672 #endif
2673 #define FF_DEBUG_BUFFERS 0x00008000
2674 #define FF_DEBUG_THREADS 0x00010000
2675 #define FF_DEBUG_GREEN_MD 0x00800000
2676 #define FF_DEBUG_NOMC 0x01000000
2677 
2678 #if FF_API_DEBUG_MV
2679  /**
2680  * debug
2681  * - encoding: Set by user.
2682  * - decoding: Set by user.
2683  */
2684  int debug_mv;
2685 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 // visualize forward predicted MVs of P-frames
2686 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 // visualize forward predicted MVs of B-frames
2687 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 // visualize backward predicted MVs of B-frames
2688 #endif
2689 
2690  /**
2691  * Error recognition; may misdetect some more or less valid parts as errors.
2692  * - encoding: unused
2693  * - decoding: Set by user.
2694  */
2696 
2697 /**
2698  * Verify checksums embedded in the bitstream (could be of either encoded or
2699  * decoded data, depending on the codec) and print an error message on mismatch.
2700  * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
2701  * decoder returning an error.
2702  */
2703 #define AV_EF_CRCCHECK (1<<0)
2704 #define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations
2705 #define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length
2706 #define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection
2707 
2708 #define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue
2709 #define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors
2710 #define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors
2711 #define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error
2712 
2713 
2714  /**
2715  * opaque 64-bit number (generally a PTS) that will be reordered and
2716  * output in AVFrame.reordered_opaque
2717  * - encoding: Set by libavcodec to the reordered_opaque of the input
2718  * frame corresponding to the last returned packet. Only
2719  * supported by encoders with the
2720  * AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability.
2721  * - decoding: Set by user.
2722  */
2724 
2725  /**
2726  * Hardware accelerator in use
2727  * - encoding: unused.
2728  * - decoding: Set by libavcodec
2729  */
2730  const struct AVHWAccel *hwaccel;
2731 
2732  /**
2733  * Hardware accelerator context.
2734  * For some hardware accelerators, a global context needs to be
2735  * provided by the user. In that case, this holds display-dependent
2736  * data FFmpeg cannot instantiate itself. Please refer to the
2737  * FFmpeg HW accelerator documentation to know how to fill this
2738  * is. e.g. for VA API, this is a struct vaapi_context.
2739  * - encoding: unused
2740  * - decoding: Set by user
2741  */
2743 
2744  /**
2745  * error
2746  * - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR.
2747  * - decoding: unused
2748  */
2750 
2751  /**
2752  * DCT algorithm, see FF_DCT_* below
2753  * - encoding: Set by user.
2754  * - decoding: unused
2755  */
2757 #define FF_DCT_AUTO 0
2758 #define FF_DCT_FASTINT 1
2759 #define FF_DCT_INT 2
2760 #define FF_DCT_MMX 3
2761 #define FF_DCT_ALTIVEC 5
2762 #define FF_DCT_FAAN 6
2763 
2764  /**
2765  * IDCT algorithm, see FF_IDCT_* below.
2766  * - encoding: Set by user.
2767  * - decoding: Set by user.
2768  */
2770 #define FF_IDCT_AUTO 0
2771 #define FF_IDCT_INT 1
2772 #define FF_IDCT_SIMPLE 2
2773 #define FF_IDCT_SIMPLEMMX 3
2774 #define FF_IDCT_ARM 7
2775 #define FF_IDCT_ALTIVEC 8
2776 #define FF_IDCT_SIMPLEARM 10
2777 #define FF_IDCT_XVID 14
2778 #define FF_IDCT_SIMPLEARMV5TE 16
2779 #define FF_IDCT_SIMPLEARMV6 17
2780 #define FF_IDCT_FAAN 20
2781 #define FF_IDCT_SIMPLENEON 22
2782 #define FF_IDCT_NONE 24 /* Used by XvMC to extract IDCT coefficients with FF_IDCT_PERM_NONE */
2783 #define FF_IDCT_SIMPLEAUTO 128
2784 
2785  /**
2786  * bits per sample/pixel from the demuxer (needed for huffyuv).
2787  * - encoding: Set by libavcodec.
2788  * - decoding: Set by user.
2789  */
2791 
2792  /**
2793  * Bits per sample/pixel of internal libavcodec pixel/sample format.
2794  * - encoding: set by user.
2795  * - decoding: set by libavcodec.
2796  */
2798 
2799 #if FF_API_LOWRES
2800  /**
2801  * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2802  * - encoding: unused
2803  * - decoding: Set by user.
2804  */
2805  int lowres;
2806 #endif
2807 
2808 #if FF_API_CODED_FRAME
2809  /**
2810  * the picture in the bitstream
2811  * - encoding: Set by libavcodec.
2812  * - decoding: unused
2813  *
2814  * @deprecated use the quality factor packet side data instead
2815  */
2817 #endif
2818 
2819  /**
2820  * thread count
2821  * is used to decide how many independent tasks should be passed to execute()
2822  * - encoding: Set by user.
2823  * - decoding: Set by user.
2824  */
2826 
2827  /**
2828  * Which multithreading methods to use.
2829  * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2830  * so clients which cannot provide future frames should not use it.
2831  *
2832  * - encoding: Set by user, otherwise the default is used.
2833  * - decoding: Set by user, otherwise the default is used.
2834  */
2836 #define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2837 #define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
2838 
2839  /**
2840  * Which multithreading methods are in use by the codec.
2841  * - encoding: Set by libavcodec.
2842  * - decoding: Set by libavcodec.
2843  */
2845 
2846  /**
2847  * Set by the client if its custom get_buffer() callback can be called
2848  * synchronously from another thread, which allows faster multithreaded decoding.
2849  * draw_horiz_band() will be called from other threads regardless of this setting.
2850  * Ignored if the default get_buffer() is used.
2851  * - encoding: Set by user.
2852  * - decoding: Set by user.
2853  */
2855 
2856  /**
2857  * The codec may call this to execute several independent things.
2858  * It will return only after finishing all tasks.
2859  * The user may replace this with some multithreaded implementation,
2860  * the default implementation will execute the parts serially.
2861  * @param count the number of things to execute
2862  * - encoding: Set by libavcodec, user can override.
2863  * - decoding: Set by libavcodec, user can override.
2864  */
2865  int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2866 
2867  /**
2868  * The codec may call this to execute several independent things.
2869  * It will return only after finishing all tasks.
2870  * The user may replace this with some multithreaded implementation,
2871  * the default implementation will execute the parts serially.
2872  * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2873  * @param c context passed also to func
2874  * @param count the number of things to execute
2875  * @param arg2 argument passed unchanged to func
2876  * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2877  * @param func function that will be called count times, with jobnr from 0 to count-1.
2878  * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2879  * two instances of func executing at the same time will have the same threadnr.
2880  * @return always 0 currently, but code should handle a future improvement where when any call to func
2881  * returns < 0 no further calls to func may be done and < 0 is returned.
2882  * - encoding: Set by libavcodec, user can override.
2883  * - decoding: Set by libavcodec, user can override.
2884  */
2885  int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2886 
2887  /**
2888  * noise vs. sse weight for the nsse comparison function
2889  * - encoding: Set by user.
2890  * - decoding: unused
2891  */
2893 
2894  /**
2895  * profile
2896  * - encoding: Set by user.
2897  * - decoding: Set by libavcodec.
2898  */
2899  int profile;
2900 #define FF_PROFILE_UNKNOWN -99
2901 #define FF_PROFILE_RESERVED -100
2902 
2903 #define FF_PROFILE_AAC_MAIN 0
2904 #define FF_PROFILE_AAC_LOW 1
2905 #define FF_PROFILE_AAC_SSR 2
2906 #define FF_PROFILE_AAC_LTP 3
2907 #define FF_PROFILE_AAC_HE 4
2908 #define FF_PROFILE_AAC_HE_V2 28
2909 #define FF_PROFILE_AAC_LD 22
2910 #define FF_PROFILE_AAC_ELD 38
2911 #define FF_PROFILE_MPEG2_AAC_LOW 128
2912 #define FF_PROFILE_MPEG2_AAC_HE 131
2913 
2914 #define FF_PROFILE_DNXHD 0
2915 #define FF_PROFILE_DNXHR_LB 1
2916 #define FF_PROFILE_DNXHR_SQ 2
2917 #define FF_PROFILE_DNXHR_HQ 3
2918 #define FF_PROFILE_DNXHR_HQX 4
2919 #define FF_PROFILE_DNXHR_444 5
2920 
2921 #define FF_PROFILE_DTS 20
2922 #define FF_PROFILE_DTS_ES 30
2923 #define FF_PROFILE_DTS_96_24 40
2924 #define FF_PROFILE_DTS_HD_HRA 50
2925 #define FF_PROFILE_DTS_HD_MA 60
2926 #define FF_PROFILE_DTS_EXPRESS 70
2927 
2928 #define FF_PROFILE_MPEG2_422 0
2929 #define FF_PROFILE_MPEG2_HIGH 1
2930 #define FF_PROFILE_MPEG2_SS 2
2931 #define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2932 #define FF_PROFILE_MPEG2_MAIN 4
2933 #define FF_PROFILE_MPEG2_SIMPLE 5
2934 
2935 #define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2936 #define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2937 
2938 #define FF_PROFILE_H264_BASELINE 66
2939 #define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2940 #define FF_PROFILE_H264_MAIN 77
2941 #define FF_PROFILE_H264_EXTENDED 88
2942 #define FF_PROFILE_H264_HIGH 100
2943 #define FF_PROFILE_H264_HIGH_10 110
2944 #define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2945 #define FF_PROFILE_H264_MULTIVIEW_HIGH 118
2946 #define FF_PROFILE_H264_HIGH_422 122
2947 #define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2948 #define FF_PROFILE_H264_STEREO_HIGH 128
2949 #define FF_PROFILE_H264_HIGH_444 144
2950 #define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2951 #define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2952 #define FF_PROFILE_H264_CAVLC_444 44
2953 
2954 #define FF_PROFILE_VC1_SIMPLE 0
2955 #define FF_PROFILE_VC1_MAIN 1
2956 #define FF_PROFILE_VC1_COMPLEX 2
2957 #define FF_PROFILE_VC1_ADVANCED 3
2958 
2959 #define FF_PROFILE_MPEG4_SIMPLE 0
2960 #define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2961 #define FF_PROFILE_MPEG4_CORE 2
2962 #define FF_PROFILE_MPEG4_MAIN 3
2963 #define FF_PROFILE_MPEG4_N_BIT 4
2964 #define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2965 #define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2966 #define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2967 #define FF_PROFILE_MPEG4_HYBRID 8
2968 #define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2969 #define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2970 #define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2971 #define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2972 #define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2973 #define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2974 #define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
2975 
2976 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1
2977 #define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2
2978 #define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768
2979 #define FF_PROFILE_JPEG2000_DCINEMA_2K 3
2980 #define FF_PROFILE_JPEG2000_DCINEMA_4K 4
2981 
2982 #define FF_PROFILE_VP9_0 0
2983 #define FF_PROFILE_VP9_1 1
2984 #define FF_PROFILE_VP9_2 2
2985 #define FF_PROFILE_VP9_3 3
2986 
2987 #define FF_PROFILE_HEVC_MAIN 1
2988 #define FF_PROFILE_HEVC_MAIN_10 2
2989 #define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3
2990 #define FF_PROFILE_HEVC_REXT 4
2991 
2992 #define FF_PROFILE_AV1_MAIN 0
2993 #define FF_PROFILE_AV1_HIGH 1
2994 #define FF_PROFILE_AV1_PROFESSIONAL 2
2995 
2996 #define FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT 0xc0
2997 #define FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT 0xc1
2998 #define FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT 0xc2
2999 #define FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS 0xc3
3000 #define FF_PROFILE_MJPEG_JPEG_LS 0xf7
3001 
3002 #define FF_PROFILE_SBC_MSBC 1
3003 
3004 #define FF_PROFILE_PRORES_PROXY 0
3005 #define FF_PROFILE_PRORES_LT 1
3006 #define FF_PROFILE_PRORES_STANDARD 2
3007 #define FF_PROFILE_PRORES_HQ 3
3008 #define FF_PROFILE_PRORES_4444 4
3009 #define FF_PROFILE_PRORES_XQ 5
3010 
3011 #define FF_PROFILE_ARIB_PROFILE_A 0
3012 #define FF_PROFILE_ARIB_PROFILE_C 1
3013 
3014  /**
3015  * level
3016  * - encoding: Set by user.
3017  * - decoding: Set by libavcodec.
3018  */
3019  int level;
3020 #define FF_LEVEL_UNKNOWN -99
3021 
3022  /**
3023  * Skip loop filtering for selected frames.
3024  * - encoding: unused
3025  * - decoding: Set by user.
3026  */
3028 
3029  /**
3030  * Skip IDCT/dequantization for selected frames.
3031  * - encoding: unused
3032  * - decoding: Set by user.
3033  */
3035 
3036  /**
3037  * Skip decoding for selected frames.
3038  * - encoding: unused
3039  * - decoding: Set by user.
3040  */
3042 
3043  /**
3044  * Header containing style information for text subtitles.
3045  * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
3046  * [Script Info] and [V4+ Styles] section, plus the [Events] line and
3047  * the Format line following. It shouldn't include any Dialogue line.
3048  * - encoding: Set/allocated/freed by user (before avcodec_open2())
3049  * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
3050  */
3053 
3054 #if FF_API_VBV_DELAY
3055  /**
3056  * VBV delay coded in the last frame (in periods of a 27 MHz clock).
3057  * Used for compliant TS muxing.
3058  * - encoding: Set by libavcodec.
3059  * - decoding: unused.
3060  * @deprecated this value is now exported as a part of
3061  * AV_PKT_DATA_CPB_PROPERTIES packet side data
3062  */
3064  uint64_t vbv_delay;
3065 #endif
3066 
3067 #if FF_API_SIDEDATA_ONLY_PKT
3068  /**
3069  * Encoding only and set by default. Allow encoders to output packets
3070  * that do not contain any encoded data, only side data.
3071  *
3072  * Some encoders need to output such packets, e.g. to update some stream
3073  * parameters at the end of encoding.
3074  *
3075  * @deprecated this field disables the default behaviour and
3076  * it is kept only for compatibility.
3077  */
3080 #endif
3081 
3082  /**
3083  * Audio only. The number of "priming" samples (padding) inserted by the
3084  * encoder at the beginning of the audio. I.e. this number of leading
3085  * decoded samples must be discarded by the caller to get the original audio
3086  * without leading padding.
3087  *
3088  * - decoding: unused
3089  * - encoding: Set by libavcodec. The timestamps on the output packets are
3090  * adjusted by the encoder so that they always refer to the
3091  * first sample of the data actually contained in the packet,
3092  * including any added padding. E.g. if the timebase is
3093  * 1/samplerate and the timestamp of the first input sample is
3094  * 0, the timestamp of the first output packet will be
3095  * -initial_padding.
3096  */
3098 
3099  /**
3100  * - decoding: For codecs that store a framerate value in the compressed
3101  * bitstream, the decoder may export it here. { 0, 1} when
3102  * unknown.
3103  * - encoding: May be used to signal the framerate of CFR content to an
3104  * encoder.
3105  */
3107 
3108  /**
3109  * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
3110  * - encoding: unused.
3111  * - decoding: Set by libavcodec before calling get_format()
3112  */
3114 
3115  /**
3116  * Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
3117  * - encoding unused.
3118  * - decoding set by user.
3119  */
3121 
3122  /**
3123  * AVCodecDescriptor
3124  * - encoding: unused.
3125  * - decoding: set by libavcodec.
3126  */
3128 
3129 #if !FF_API_LOWRES
3130  /**
3131  * low resolution decoding, 1-> 1/2 size, 2->1/4 size
3132  * - encoding: unused
3133  * - decoding: Set by user.
3134  */
3135  int lowres;
3136 #endif
3137 
3138  /**
3139  * Current statistics for PTS correction.
3140  * - decoding: maintained and used by libavcodec, not intended to be used by user apps
3141  * - encoding: unused
3142  */
3143  int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
3144  int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
3145  int64_t pts_correction_last_pts; /// PTS of the last frame
3146  int64_t pts_correction_last_dts; /// DTS of the last frame
3147 
3148  /**
3149  * Character encoding of the input subtitles file.
3150  * - decoding: set by user
3151  * - encoding: unused
3152  */
3154 
3155  /**
3156  * Subtitles character encoding mode. Formats or codecs might be adjusting
3157  * this setting (if they are doing the conversion themselves for instance).
3158  * - decoding: set by libavcodec
3159  * - encoding: unused
3160  */
3162 #define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
3163 #define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself
3164 #define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
3165 #define FF_SUB_CHARENC_MODE_IGNORE 2 ///< neither convert the subtitles, nor check them for valid UTF-8
3166 
3167  /**
3168  * Skip processing alpha if supported by codec.
3169  * Note that if the format uses pre-multiplied alpha (common with VP6,
3170  * and recommended due to better video quality/compression)
3171  * the image will look as if alpha-blended onto a black background.
3172  * However for formats that do not use pre-multiplied alpha
3173  * there might be serious artefacts (though e.g. libswscale currently
3174  * assumes pre-multiplied alpha anyway).
3175  *
3176  * - decoding: set by user
3177  * - encoding: unused
3178  */
3180 
3181  /**
3182  * Number of samples to skip after a discontinuity
3183  * - decoding: unused
3184  * - encoding: set by libavcodec
3185  */
3187 
3188 #if !FF_API_DEBUG_MV
3189  /**
3190  * debug motion vectors
3191  * - encoding: Set by user.
3192  * - decoding: Set by user.
3193  */
3195 #define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
3196 #define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
3197 #define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
3198 #endif
3199 
3200  /**
3201  * custom intra quantization matrix
3202  * - encoding: Set by user, can be NULL.
3203  * - decoding: unused.
3204  */
3206 
3207  /**
3208  * dump format separator.
3209  * can be ", " or "\n " or anything else
3210  * - encoding: Set by user.
3211  * - decoding: Set by user.
3212  */
3213  uint8_t *dump_separator;
3214 
3215  /**
3216  * ',' separated list of allowed decoders.
3217  * If NULL then all are allowed
3218  * - encoding: unused
3219  * - decoding: set by user
3220  */
3222 
3223  /**
3224  * Properties of the stream that gets decoded
3225  * - encoding: unused
3226  * - decoding: set by libavcodec
3227  */
3228  unsigned properties;
3229 #define FF_CODEC_PROPERTY_LOSSLESS 0x00000001
3230 #define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002
3231 
3232  /**
3233  * Additional data associated with the entire coded stream.
3234  *
3235  * - decoding: unused
3236  * - encoding: may be set by libavcodec after avcodec_open2().
3237  */
3240 
3241  /**
3242  * A reference to the AVHWFramesContext describing the input (for encoding)
3243  * or output (decoding) frames. The reference is set by the caller and
3244  * afterwards owned (and freed) by libavcodec - it should never be read by
3245  * the caller after being set.
3246  *
3247  * - decoding: This field should be set by the caller from the get_format()
3248  * callback. The previous reference (if any) will always be
3249  * unreffed by libavcodec before the get_format() call.
3250  *
3251  * If the default get_buffer2() is used with a hwaccel pixel
3252  * format, then this AVHWFramesContext will be used for
3253  * allocating the frame buffers.
3254  *
3255  * - encoding: For hardware encoders configured to use a hwaccel pixel
3256  * format, this field should be set by the caller to a reference
3257  * to the AVHWFramesContext describing input frames.
3258  * AVHWFramesContext.format must be equal to
3259  * AVCodecContext.pix_fmt.
3260  *
3261  * This field should be set before avcodec_open2() is called.
3262  */
3264 
3265  /**
3266  * Control the form of AVSubtitle.rects[N]->ass
3267  * - decoding: set by user
3268  * - encoding: unused
3269  */
3271 #define FF_SUB_TEXT_FMT_ASS 0
3272 #if FF_API_ASS_TIMING
3273 #define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS 1
3274 #endif
3275 
3276  /**
3277  * Audio only. The amount of padding (in samples) appended by the encoder to
3278  * the end of the audio. I.e. this number of decoded samples must be
3279  * discarded by the caller from the end of the stream to get the original
3280  * audio without any trailing padding.
3281  *
3282  * - decoding: unused
3283  * - encoding: unused
3284  */
3286 
3287  /**
3288  * The number of pixels per image to maximally accept.
3289  *
3290  * - decoding: set by user
3291  * - encoding: set by user
3292  */
3293  int64_t max_pixels;
3294 
3295  /**
3296  * A reference to the AVHWDeviceContext describing the device which will
3297  * be used by a hardware encoder/decoder. The reference is set by the
3298  * caller and afterwards owned (and freed) by libavcodec.
3299  *
3300  * This should be used if either the codec device does not require
3301  * hardware frames or any that are used are to be allocated internally by
3302  * libavcodec. If the user wishes to supply any of the frames used as
3303  * encoder input or decoder output then hw_frames_ctx should be used
3304  * instead. When hw_frames_ctx is set in get_format() for a decoder, this
3305  * field will be ignored while decoding the associated stream segment, but
3306  * may again be used on a following one after another get_format() call.
3307  *
3308  * For both encoders and decoders this field should be set before
3309  * avcodec_open2() is called and must not be written to thereafter.
3310  *
3311  * Note that some decoders may require this field to be set initially in
3312  * order to support hw_frames_ctx at all - in that case, all frames
3313  * contexts used must be created on the same device.
3314  */
3316 
3317  /**
3318  * Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated
3319  * decoding (if active).
3320  * - encoding: unused
3321  * - decoding: Set by user (either before avcodec_open2(), or in the
3322  * AVCodecContext.get_format callback)
3323  */
3325 
3326  /**
3327  * Video decoding only. Certain video codecs support cropping, meaning that
3328  * only a sub-rectangle of the decoded frame is intended for display. This
3329  * option controls how cropping is handled by libavcodec.
3330  *
3331  * When set to 1 (the default), libavcodec will apply cropping internally.
3332  * I.e. it will modify the output frame width/height fields and offset the
3333  * data pointers (only by as much as possible while preserving alignment, or
3334  * by the full amount if the AV_CODEC_FLAG_UNALIGNED flag is set) so that
3335  * the frames output by the decoder refer only to the cropped area. The
3336  * crop_* fields of the output frames will be zero.
3337  *
3338  * When set to 0, the width/height fields of the output frames will be set
3339  * to the coded dimensions and the crop_* fields will describe the cropping
3340  * rectangle. Applying the cropping is left to the caller.
3341  *
3342  * @warning When hardware acceleration with opaque output frames is used,
3343  * libavcodec is unable to apply cropping from the top/left border.
3344  *
3345  * @note when this option is set to zero, the width/height fields of the
3346  * AVCodecContext and output AVFrames have different meanings. The codec
3347  * context fields store display dimensions (with the coded dimensions in
3348  * coded_width/height), while the frame fields store the coded dimensions
3349  * (with the display dimensions being determined by the crop_* fields).
3350  */
3352 
3353  /*
3354  * Video decoding only. Sets the number of extra hardware frames which
3355  * the decoder will allocate for use by the caller. This must be set
3356  * before avcodec_open2() is called.
3357  *
3358  * Some hardware decoders require all frames that they will use for
3359  * output to be defined in advance before decoding starts. For such
3360  * decoders, the hardware frame pool must therefore be of a fixed size.
3361  * The extra frames set here are on top of any number that the decoder
3362  * needs internally in order to operate normally (for example, frames
3363  * used as reference pictures).
3364  */
3366 
3367  /**
3368  * The percentage of damaged samples to discard a frame.
3369  *
3370  * - decoding: set by user
3371  * - encoding: unused
3372  */
3374 } AVCodecContext;
3375 
3376 #if FF_API_CODEC_GET_SET
3377 /**
3378  * Accessors for some AVCodecContext fields. These used to be provided for ABI
3379  * compatibility, and do not need to be used anymore.
3380  */
3385 
3390 
3392 unsigned av_codec_get_codec_properties(const AVCodecContext *avctx);
3393 
3394 #if FF_API_LOWRES
3396 int av_codec_get_lowres(const AVCodecContext *avctx);
3398 void av_codec_set_lowres(AVCodecContext *avctx, int val);
3399 #endif
3400 
3402 int av_codec_get_seek_preroll(const AVCodecContext *avctx);
3404 void av_codec_set_seek_preroll(AVCodecContext *avctx, int val);
3405 
3407 uint16_t *av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx);
3409 void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val);
3410 #endif
3411 
3412 /**
3413  * AVProfile.
3414  */
3415 typedef struct AVProfile {
3416  int profile;
3417  const char *name; ///< short name for the profile
3418 } AVProfile;
3419 
3420 enum {
3421  /**
3422  * The codec supports this format via the hw_device_ctx interface.
3423  *
3424  * When selecting this format, AVCodecContext.hw_device_ctx should
3425  * have been set to a device of the specified type before calling
3426  * avcodec_open2().
3427  */
3429  /**
3430  * The codec supports this format via the hw_frames_ctx interface.
3431  *
3432  * When selecting this format for a decoder,
3433  * AVCodecContext.hw_frames_ctx should be set to a suitable frames
3434  * context inside the get_format() callback. The frames context
3435  * must have been created on a device of the specified type.
3436  */
3438  /**
3439  * The codec supports this format by some internal method.
3440  *
3441  * This format can be selected without any additional configuration -
3442  * no device or frames context is required.
3443  */
3445  /**
3446  * The codec supports this format by some ad-hoc method.
3447  *
3448  * Additional settings and/or function calls are required. See the
3449  * codec-specific documentation for details. (Methods requiring
3450  * this sort of configuration are deprecated and others should be
3451  * used in preference.)
3452  */
3454 };
3455 
3456 typedef struct AVCodecHWConfig {
3457  /**
3458  * A hardware pixel format which the codec can use.
3459  */
3461  /**
3462  * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
3463  * setup methods which can be used with this configuration.
3464  */
3465  int methods;
3466  /**
3467  * The device type associated with the configuration.
3468  *
3469  * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
3470  * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
3471  */
3473 } AVCodecHWConfig;
3474 
3476 
3477 struct AVSubtitle;
3478 
3479 /**
3480  * AVCodec.
3481  */
3482 typedef struct AVCodec {
3483  /**
3484  * Name of the codec implementation.
3485  * The name is globally unique among encoders and among decoders (but an
3486  * encoder and a decoder can share the same name).
3487  * This is the primary way to find a codec from the user perspective.
3488  */
3489  const char *name;
3490  /**
3491  * Descriptive name for the codec, meant to be more human readable than name.
3492  * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
3493  */
3494  const char *long_name;
3497  /**
3498  * Codec capabilities.
3499  * see AV_CODEC_CAP_*
3500  */
3502  const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
3503  const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
3504  const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
3505  const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
3506  const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
3507  uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
3508  const AVClass *priv_class; ///< AVClass for the private context
3509  const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
3510 
3511  /**
3512  * Group name of the codec implementation.
3513  * This is a short symbolic name of the wrapper backing this codec. A
3514  * wrapper uses some kind of external implementation for the codec, such
3515  * as an external library, or a codec implementation provided by the OS or
3516  * the hardware.
3517  * If this field is NULL, this is a builtin, libavcodec native codec.
3518  * If non-NULL, this will be the suffix in AVCodec.name in most cases
3519  * (usually AVCodec.name will be of the form "<codec_name>_<wrapper_name>").
3520  */
3521  const char *wrapper_name;
3522 
3523  /*****************************************************************
3524  * No fields below this line are part of the public API. They
3525  * may not be used outside of libavcodec and can be changed and
3526  * removed at will.
3527  * New public fields should be added right above.
3528  *****************************************************************
3529  */
3531  struct AVCodec *next;
3532  /**
3533  * @name Frame-level threading support functions
3534  * @{
3535  */
3536  /**
3537  * If defined, called on thread contexts when they are created.
3538  * If the codec allocates writable tables in init(), re-allocate them here.
3539  * priv_data will be set to a copy of the original.
3540  */
3542  /**
3543  * Copy necessary context variables from a previous thread context to the current one.
3544  * If not defined, the next thread will start automatically; otherwise, the codec
3545  * must call ff_thread_finish_setup().
3546  *
3547  * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
3548  */
3550  /** @} */
3551 
3552  /**
3553  * Private codec-specific defaults.
3554  */
3556 
3557  /**
3558  * Initialize codec static data, called from avcodec_register().
3559  *
3560  * This is not intended for time consuming operations as it is
3561  * run for every codec regardless of that codec being used.
3562  */
3563  void (*init_static_data)(struct AVCodec *codec);
3564 
3566  int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
3567  const struct AVSubtitle *sub);
3568  /**
3569  * Encode data to an AVPacket.
3570  *
3571  * @param avctx codec context
3572  * @param avpkt output AVPacket (may contain a user-provided buffer)
3573  * @param[in] frame AVFrame containing the raw data to be encoded
3574  * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
3575  * non-empty packet was returned in avpkt.
3576  * @return 0 on success, negative error code on failure
3577  */
3578  int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
3579  int *got_packet_ptr);
3580  int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
3582  /**
3583  * Encode API with decoupled packet/frame dataflow. The API is the
3584  * same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except
3585  * that:
3586  * - never called if the codec is closed or the wrong type,
3587  * - if AV_CODEC_CAP_DELAY is not set, drain frames are never sent,
3588  * - only one drain frame is ever passed down,
3589  */
3590  int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame);
3591  int (*receive_packet)(AVCodecContext *avctx, AVPacket *avpkt);
3592 
3593  /**
3594  * Decode API with decoupled packet/frame dataflow. This function is called
3595  * to get one output frame. It should call ff_decode_get_packet() to obtain
3596  * input data.
3597  */
3599  /**
3600  * Flush buffers.
3601  * Will be called when seeking
3602  */
3603  void (*flush)(AVCodecContext *);
3604  /**
3605  * Internal codec capabilities.
3606  * See FF_CODEC_CAP_* in internal.h
3607  */
3609 
3610  /**
3611  * Decoding only, a comma-separated list of bitstream filters to apply to
3612  * packets before decoding.
3613  */
3614  const char *bsfs;
3615 
3616  /**
3617  * Array of pointers to hardware configurations supported by the codec,
3618  * or NULL if no hardware supported. The array is terminated by a NULL
3619  * pointer.
3620  *
3621  * The user can only access this field via avcodec_get_hw_config().
3622  */
3623  const struct AVCodecHWConfigInternal **hw_configs;
3624 } AVCodec;
3625 
3626 #if FF_API_CODEC_GET_SET
3628 int av_codec_get_max_lowres(const AVCodec *codec);
3629 #endif
3630 
3631 struct MpegEncContext;
3632 
3633 /**
3634  * Retrieve supported hardware configurations for a codec.
3635  *
3636  * Values of index from zero to some maximum return the indexed configuration
3637  * descriptor; all other values return NULL. If the codec does not support
3638  * any hardware configurations then it will always return NULL.
3639  */
3640 const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
3641 
3642 /**
3643  * @defgroup lavc_hwaccel AVHWAccel
3644  *
3645  * @note Nothing in this structure should be accessed by the user. At some
3646  * point in future it will not be externally visible at all.
3647  *
3648  * @{
3649  */
3650 typedef struct AVHWAccel {
3651  /**
3652  * Name of the hardware accelerated codec.
3653  * The name is globally unique among encoders and among decoders (but an
3654  * encoder and a decoder can share the same name).
3655  */
3656  const char *name;
3657 
3658  /**
3659  * Type of codec implemented by the hardware accelerator.
3660  *
3661  * See AVMEDIA_TYPE_xxx
3662  */
3664 
3665  /**
3666  * Codec implemented by the hardware accelerator.
3667  *
3668  * See AV_CODEC_ID_xxx
3669  */
3671 
3672  /**
3673  * Supported pixel format.
3674  *
3675  * Only hardware accelerated formats are supported here.
3676  */
3678 
3679  /**
3680  * Hardware accelerated codec capabilities.
3681  * see AV_HWACCEL_CODEC_CAP_*
3682  */
3684 
3685  /*****************************************************************
3686  * No fields below this line are part of the public API. They
3687  * may not be used outside of libavcodec and can be changed and
3688  * removed at will.
3689  * New public fields should be added right above.
3690  *****************************************************************
3691  */
3692 
3693  /**
3694  * Allocate a custom buffer
3695  */
3697 
3698  /**
3699  * Called at the beginning of each frame or field picture.
3700  *
3701  * Meaningful frame information (codec specific) is guaranteed to
3702  * be parsed at this point. This function is mandatory.
3703  *
3704  * Note that buf can be NULL along with buf_size set to 0.
3705  * Otherwise, this means the whole frame is available at this point.
3706  *
3707  * @param avctx the codec context
3708  * @param buf the frame data buffer base
3709  * @param buf_size the size of the frame in bytes
3710  * @return zero if successful, a negative value otherwise
3711  */
3712  int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3713 
3714  /**
3715  * Callback for parameter data (SPS/PPS/VPS etc).
3716  *
3717  * Useful for hardware decoders which keep persistent state about the
3718  * video parameters, and need to receive any changes to update that state.
3719  *
3720  * @param avctx the codec context
3721  * @param type the nal unit type
3722  * @param buf the nal unit data buffer
3723  * @param buf_size the size of the nal unit in bytes
3724  * @return zero if successful, a negative value otherwise
3725  */
3726  int (*decode_params)(AVCodecContext *avctx, int type, const uint8_t *buf, uint32_t buf_size);
3727 
3728  /**
3729  * Callback for each slice.
3730  *
3731  * Meaningful slice information (codec specific) is guaranteed to
3732  * be parsed at this point. This function is mandatory.
3733  * The only exception is XvMC, that works on MB level.
3734  *
3735  * @param avctx the codec context
3736  * @param buf the slice data buffer base
3737  * @param buf_size the size of the slice in bytes
3738  * @return zero if successful, a negative value otherwise
3739  */
3740  int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3741 
3742  /**
3743  * Called at the end of each frame or field picture.
3744  *
3745  * The whole picture is parsed at this point and can now be sent
3746  * to the hardware accelerator. This function is mandatory.
3747  *
3748  * @param avctx the codec context
3749  * @return zero if successful, a negative value otherwise
3750  */
3751  int (*end_frame)(AVCodecContext *avctx);
3752 
3753  /**
3754  * Size of per-frame hardware accelerator private data.
3755  *
3756  * Private data is allocated with av_mallocz() before
3757  * AVCodecContext.get_buffer() and deallocated after
3758  * AVCodecContext.release_buffer().
3759  */
3761 
3762  /**
3763  * Called for every Macroblock in a slice.
3764  *
3765  * XvMC uses it to replace the ff_mpv_reconstruct_mb().
3766  * Instead of decoding to raw picture, MB parameters are
3767  * stored in an array provided by the video driver.
3768  *
3769  * @param s the mpeg context
3770  */
3771  void (*decode_mb)(struct MpegEncContext *s);
3772 
3773  /**
3774  * Initialize the hwaccel private data.
3775  *
3776  * This will be called from ff_get_format(), after hwaccel and
3777  * hwaccel_context are set and the hwaccel private data in AVCodecInternal
3778  * is allocated.
3779  */
3780  int (*init)(AVCodecContext *avctx);
3781 
3782  /**
3783  * Uninitialize the hwaccel private data.
3784  *
3785  * This will be called from get_format() or avcodec_close(), after hwaccel
3786  * and hwaccel_context are already uninitialized.
3787  */
3788  int (*uninit)(AVCodecContext *avctx);
3789 
3790  /**
3791  * Size of the private data to allocate in
3792  * AVCodecInternal.hwaccel_priv_data.
3793  */
3795 
3796  /**
3797  * Internal hwaccel capabilities.
3798  */
3800 
3801  /**
3802  * Fill the given hw_frames context with current codec parameters. Called
3803  * from get_format. Refer to avcodec_get_hw_frames_parameters() for
3804  * details.
3805  *
3806  * This CAN be called before AVHWAccel.init is called, and you must assume
3807  * that avctx->hwaccel_priv_data is invalid.
3808  */
3809  int (*frame_params)(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx);
3810 } AVHWAccel;
3811 
3812 /**
3813  * HWAccel is experimental and is thus avoided in favor of non experimental
3814  * codecs
3815  */
3816 #define AV_HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200
3817 
3818 /**
3819  * Hardware acceleration should be used for decoding even if the codec level
3820  * used is unknown or higher than the maximum supported level reported by the
3821  * hardware driver.
3822  *
3823  * It's generally a good idea to pass this flag unless you have a specific
3824  * reason not to, as hardware tends to under-report supported levels.
3825  */
3826 #define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
3827 
3828 /**
3829  * Hardware acceleration can output YUV pixel formats with a different chroma
3830  * sampling than 4:2:0 and/or other than 8 bits per component.
3831  */
3832 #define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
3833 
3834 /**
3835  * Hardware acceleration should still be attempted for decoding when the
3836  * codec profile does not match the reported capabilities of the hardware.
3837  *
3838  * For example, this can be used to try to decode baseline profile H.264
3839  * streams in hardware - it will often succeed, because many streams marked
3840  * as baseline profile actually conform to constrained baseline profile.
3841  *
3842  * @warning If the stream is actually not supported then the behaviour is
3843  * undefined, and may include returning entirely incorrect output
3844  * while indicating success.
3845  */
3846 #define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
3847 
3848 /**
3849  * @}
3850  */
3851 
3852 #if FF_API_AVPICTURE
3853 /**
3854  * @defgroup lavc_picture AVPicture
3855  *
3856  * Functions for working with AVPicture
3857  * @{
3858  */
3859 
3860 /**
3861  * Picture data structure.
3862  *
3863  * Up to four components can be stored into it, the last component is
3864  * alpha.
3865  * @deprecated use AVFrame or imgutils functions instead
3866  */
3867 typedef struct AVPicture {
3869  uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes
3871  int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
3872 } AVPicture;
3873 
3874 /**
3875  * @}
3876  */
3877 #endif
3878 
3881 
3882  SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3883 
3884  /**
3885  * Plain text, the text field must be set by the decoder and is
3886  * authoritative. ass and pict fields may contain approximations.
3887  */
3889 
3890  /**
3891  * Formatted text, the ass field must be set by the decoder and is
3892  * authoritative. pict and text fields may contain approximations.
3893  */
3895 };
3896 
3897 #define AV_SUBTITLE_FLAG_FORCED 0x00000001
3898 
3899 typedef struct AVSubtitleRect {
3900  int x; ///< top left corner of pict, undefined when pict is not set
3901  int y; ///< top left corner of pict, undefined when pict is not set
3902  int w; ///< width of pict, undefined when pict is not set
3903  int h; ///< height of pict, undefined when pict is not set
3904  int nb_colors; ///< number of colors in pict, undefined when pict is not set
3905 
3906 #if FF_API_AVPICTURE
3907  /**
3908  * @deprecated unused
3909  */
3912 #endif
3913  /**
3914  * data+linesize for the bitmap of this subtitle.
3915  * Can be set for text/ass as well once they are rendered.
3916  */
3917  uint8_t *data[4];
3918  int linesize[4];
3919 
3921 
3922  char *text; ///< 0 terminated plain UTF-8 text
3923 
3924  /**
3925  * 0 terminated ASS/SSA compatible event line.
3926  * The presentation of this is unaffected by the other values in this
3927  * struct.
3928  */
3929  char *ass;
3930 
3931  int flags;
3932 } AVSubtitleRect;
3933 
3934 typedef struct AVSubtitle {
3935  uint16_t format; /* 0 = graphics */
3936  uint32_t start_display_time; /* relative to packet pts, in ms */
3937  uint32_t end_display_time; /* relative to packet pts, in ms */
3938  unsigned num_rects;
3940  int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
3941 } AVSubtitle;
3942 
3943 /**
3944  * This struct describes the properties of an encoded stream.
3945  *
3946  * sizeof(AVCodecParameters) is not a part of the public ABI, this struct must
3947  * be allocated with avcodec_parameters_alloc() and freed with
3948  * avcodec_parameters_free().
3949  */
3950 typedef struct AVCodecParameters {
3951  /**
3952  * General type of the encoded data.
3953  */
3955  /**
3956  * Specific type of the encoded data (the codec used).
3957  */
3959  /**
3960  * Additional information about the codec (corresponds to the AVI FOURCC).
3961  */
3962  uint32_t codec_tag;
3963 
3964  /**
3965  * Extra binary data needed for initializing the decoder, codec-dependent.
3966  *
3967  * Must be allocated with av_malloc() and will be freed by
3968  * avcodec_parameters_free(). The allocated size of extradata must be at
3969  * least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding
3970  * bytes zeroed.
3971  */
3972  uint8_t *extradata;
3973  /**
3974  * Size of the extradata content in bytes.
3975  */
3977 
3978  /**
3979  * - video: the pixel format, the value corresponds to enum AVPixelFormat.
3980  * - audio: the sample format, the value corresponds to enum AVSampleFormat.
3981  */
3982  int format;
3983 
3984  /**
3985  * The average bitrate of the encoded data (in bits per second).
3986  */
3987  int64_t bit_rate;
3988 
3989  /**
3990  * The number of bits per sample in the codedwords.
3991  *
3992  * This is basically the bitrate per sample. It is mandatory for a bunch of
3993  * formats to actually decode them. It's the number of bits for one sample in
3994  * the actual coded bitstream.
3995  *
3996  * This could be for example 4 for ADPCM
3997  * For PCM formats this matches bits_per_raw_sample
3998  * Can be 0
3999  */
4001 
4002  /**
4003  * This is the number of valid bits in each output sample. If the
4004  * sample format has more bits, the least significant bits are additional
4005  * padding bits, which are always 0. Use right shifts to reduce the sample
4006  * to its actual size. For example, audio formats with 24 bit samples will
4007  * have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32.
4008  * To get the original sample use "(int32_t)sample >> 8"."
4009  *
4010  * For ADPCM this might be 12 or 16 or similar
4011  * Can be 0
4012  */
4014 
4015  /**
4016  * Codec-specific bitstream restrictions that the stream conforms to.
4017  */
4018  int profile;
4019  int level;
4020 
4021  /**
4022  * Video only. The dimensions of the video frame in pixels.
4023  */
4024  int width;
4025  int height;
4026 
4027  /**
4028  * Video only. The aspect ratio (width / height) which a single pixel
4029  * should have when displayed.
4030  *
4031  * When the aspect ratio is unknown / undefined, the numerator should be
4032  * set to 0 (the denominator may have any value).
4033  */
4035 
4036  /**
4037  * Video only. The order of the fields in interlaced video.
4038  */
4040 
4041  /**
4042  * Video only. Additional colorspace characteristics.
4043  */
4049 
4050  /**
4051  * Video only. Number of delayed frames.
4052  */
4054 
4055  /**
4056  * Audio only. The channel layout bitmask. May be 0 if the channel layout is
4057  * unknown or unspecified, otherwise the number of bits set must be equal to
4058  * the channels field.
4059  */
4060  uint64_t channel_layout;
4061  /**
4062  * Audio only. The number of audio channels.
4063  */
4065  /**
4066  * Audio only. The number of audio samples per second.
4067  */
4069  /**
4070  * Audio only. The number of bytes per coded audio frame, required by some
4071  * formats.
4072  *
4073  * Corresponds to nBlockAlign in WAVEFORMATEX.
4074  */
4076  /**
4077  * Audio only. Audio frame size, if known. Required by some formats to be static.
4078  */
4080 
4081  /**
4082  * Audio only. The amount of padding (in samples) inserted by the encoder at
4083  * the beginning of the audio. I.e. this number of leading decoded samples
4084  * must be discarded by the caller to get the original audio without leading
4085  * padding.
4086  */
4088  /**
4089  * Audio only. The amount of padding (in samples) appended by the encoder to
4090  * the end of the audio. I.e. this number of decoded samples must be
4091  * discarded by the caller from the end of the stream to get the original
4092  * audio without any trailing padding.
4093  */
4095  /**
4096  * Audio only. Number of samples to skip after a discontinuity.
4097  */
4100 
4101 /**
4102  * Iterate over all registered codecs.
4103  *
4104  * @param opaque a pointer where libavcodec will store the iteration state. Must
4105  * point to NULL to start the iteration.
4106  *
4107  * @return the next registered codec or NULL when the iteration is
4108  * finished
4109  */
4110 const AVCodec *av_codec_iterate(void **opaque);
4111 
4112 #if FF_API_NEXT
4113 /**
4114  * If c is NULL, returns the first registered codec,
4115  * if c is non-NULL, returns the next registered codec after c,
4116  * or NULL if c is the last one.
4117  */
4119 AVCodec *av_codec_next(const AVCodec *c);
4120 #endif
4121 
4122 /**
4123  * Return the LIBAVCODEC_VERSION_INT constant.
4124  */
4125 unsigned avcodec_version(void);
4126 
4127 /**
4128  * Return the libavcodec build-time configuration.
4129  */
4130 const char *avcodec_configuration(void);
4131 
4132 /**
4133  * Return the libavcodec license.
4134  */
4135 const char *avcodec_license(void);
4136 
4137 #if FF_API_NEXT
4138 /**
4139  * Register the codec codec and initialize libavcodec.
4140  *
4141  * @warning either this function or avcodec_register_all() must be called
4142  * before any other libavcodec functions.
4143  *
4144  * @see avcodec_register_all()
4145  */
4147 void avcodec_register(AVCodec *codec);
4148 
4149 /**
4150  * Register all the codecs, parsers and bitstream filters which were enabled at
4151  * configuration time. If you do not call this function you can select exactly
4152  * which formats you want to support, by using the individual registration
4153  * functions.
4154  *
4155  * @see avcodec_register
4156  * @see av_register_codec_parser
4157  * @see av_register_bitstream_filter
4158  */
4160 void avcodec_register_all(void);
4161 #endif
4162 
4163 /**
4164  * Allocate an AVCodecContext and set its fields to default values. The
4165  * resulting struct should be freed with avcodec_free_context().
4166  *
4167  * @param codec if non-NULL, allocate private data and initialize defaults
4168  * for the given codec. It is illegal to then call avcodec_open2()
4169  * with a different codec.
4170  * If NULL, then the codec-specific defaults won't be initialized,
4171  * which may result in suboptimal default settings (this is
4172  * important mainly for encoders, e.g. libx264).
4173  *
4174  * @return An AVCodecContext filled with default values or NULL on failure.
4175  */
4177 
4178 /**
4179  * Free the codec context and everything associated with it and write NULL to
4180  * the provided pointer.
4181  */
4182 void avcodec_free_context(AVCodecContext **avctx);
4183 
4184 #if FF_API_GET_CONTEXT_DEFAULTS
4185 /**
4186  * @deprecated This function should not be used, as closing and opening a codec
4187  * context multiple time is not supported. A new codec context should be
4188  * allocated for each new use.
4189  */
4191 #endif
4192 
4193 /**
4194  * Get the AVClass for AVCodecContext. It can be used in combination with
4195  * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4196  *
4197  * @see av_opt_find().
4198  */
4199 const AVClass *avcodec_get_class(void);
4200 
4201 #if FF_API_COPY_CONTEXT
4202 /**
4203  * Get the AVClass for AVFrame. It can be used in combination with
4204  * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4205  *
4206  * @see av_opt_find().
4207  */
4208 const AVClass *avcodec_get_frame_class(void);
4209 
4210 /**
4211  * Get the AVClass for AVSubtitleRect. It can be used in combination with
4212  * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4213  *
4214  * @see av_opt_find().
4215  */
4217 
4218 /**
4219  * Copy the settings of the source AVCodecContext into the destination
4220  * AVCodecContext. The resulting destination codec context will be
4221  * unopened, i.e. you are required to call avcodec_open2() before you
4222  * can use this AVCodecContext to decode/encode video/audio data.
4223  *
4224  * @param dest target codec context, should be initialized with
4225  * avcodec_alloc_context3(NULL), but otherwise uninitialized
4226  * @param src source codec context
4227  * @return AVERROR() on error (e.g. memory allocation error), 0 on success
4228  *
4229  * @deprecated The semantics of this function are ill-defined and it should not
4230  * be used. If you need to transfer the stream parameters from one codec context
4231  * to another, use an intermediate AVCodecParameters instance and the
4232  * avcodec_parameters_from_context() / avcodec_parameters_to_context()
4233  * functions.
4234  */
4236 int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src);
4237 #endif
4238 
4239 /**
4240  * Allocate a new AVCodecParameters and set its fields to default values
4241  * (unknown/invalid/0). The returned struct must be freed with
4242  * avcodec_parameters_free().
4243  */
4245 
4246 /**
4247  * Free an AVCodecParameters instance and everything associated with it and
4248  * write NULL to the supplied pointer.
4249  */
4251 
4252 /**
4253  * Copy the contents of src to dst. Any allocated fields in dst are freed and
4254  * replaced with newly allocated duplicates of the corresponding fields in src.
4255  *
4256  * @return >= 0 on success, a negative AVERROR code on failure.
4257  */
4259 
4260 /**
4261  * Fill the parameters struct based on the values from the supplied codec
4262  * context. Any allocated fields in par are freed and replaced with duplicates
4263  * of the corresponding fields in codec.
4264  *
4265  * @return >= 0 on success, a negative AVERROR code on failure
4266  */
4268  const AVCodecContext *codec);
4269 
4270 /**
4271  * Fill the codec context based on the values from the supplied codec
4272  * parameters. Any allocated fields in codec that have a corresponding field in
4273  * par are freed and replaced with duplicates of the corresponding field in par.
4274  * Fields in codec that do not have a counterpart in par are not touched.
4275  *
4276  * @return >= 0 on success, a negative AVERROR code on failure.
4277  */
4279  const AVCodecParameters *par);
4280 
4281 /**
4282  * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
4283  * function the context has to be allocated with avcodec_alloc_context3().
4284  *
4285  * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
4286  * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
4287  * retrieving a codec.
4288  *
4289  * @warning This function is not thread safe!
4290  *
4291  * @note Always call this function before using decoding routines (such as
4292  * @ref avcodec_receive_frame()).
4293  *
4294  * @code
4295  * avcodec_register_all();
4296  * av_dict_set(&opts, "b", "2.5M", 0);
4297  * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
4298  * if (!codec)
4299  * exit(1);
4300  *
4301  * context = avcodec_alloc_context3(codec);
4302  *
4303  * if (avcodec_open2(context, codec, opts) < 0)
4304  * exit(1);
4305  * @endcode
4306  *
4307  * @param avctx The context to initialize.
4308  * @param codec The codec to open this context for. If a non-NULL codec has been
4309  * previously passed to avcodec_alloc_context3() or
4310  * for this context, then this parameter MUST be either NULL or
4311  * equal to the previously passed codec.
4312  * @param options A dictionary filled with AVCodecContext and codec-private options.
4313  * On return this object will be filled with options that were not found.
4314  *
4315  * @return zero on success, a negative value on error
4316  * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
4317  * av_dict_set(), av_opt_find().
4318  */
4319 int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
4320 
4321 /**
4322  * Close a given AVCodecContext and free all the data associated with it
4323  * (but not the AVCodecContext itself).
4324  *
4325  * Calling this function on an AVCodecContext that hasn't been opened will free
4326  * the codec-specific data allocated in avcodec_alloc_context3() with a non-NULL
4327  * codec. Subsequent calls will do nothing.
4328  *
4329  * @note Do not use this function. Use avcodec_free_context() to destroy a
4330  * codec context (either open or closed). Opening and closing a codec context
4331  * multiple times is not supported anymore -- use multiple codec contexts
4332  * instead.
4333  */
4334 int avcodec_close(AVCodecContext *avctx);
4335 
4336 /**
4337  * Free all allocated data in the given subtitle struct.
4338  *
4339  * @param sub AVSubtitle to free.
4340  */
4341 void avsubtitle_free(AVSubtitle *sub);
4342 
4343 /**
4344  * @}
4345  */
4346 
4347 /**
4348  * @addtogroup lavc_packet
4349  * @{
4350  */
4351 
4352 /**
4353  * Allocate an AVPacket and set its fields to default values. The resulting
4354  * struct must be freed using av_packet_free().
4355  *
4356  * @return An AVPacket filled with default values or NULL on failure.
4357  *
4358  * @note this only allocates the AVPacket itself, not the data buffers. Those
4359  * must be allocated through other means such as av_new_packet.
4360  *
4361  * @see av_new_packet
4362  */
4363 AVPacket *av_packet_alloc(void);
4364 
4365 /**
4366  * Create a new packet that references the same data as src.
4367  *
4368  * This is a shortcut for av_packet_alloc()+av_packet_ref().
4369  *
4370  * @return newly created AVPacket on success, NULL on error.
4371  *
4372  * @see av_packet_alloc
4373  * @see av_packet_ref
4374  */
4375 AVPacket *av_packet_clone(const AVPacket *src);
4376 
4377 /**
4378  * Free the packet, if the packet is reference counted, it will be
4379  * unreferenced first.
4380  *
4381  * @param pkt packet to be freed. The pointer will be set to NULL.
4382  * @note passing NULL is a no-op.
4383  */
4384 void av_packet_free(AVPacket **pkt);
4385 
4386 /**
4387  * Initialize optional fields of a packet with default values.
4388  *
4389  * Note, this does not touch the data and size members, which have to be
4390  * initialized separately.
4391  *
4392  * @param pkt packet
4393  */
4394 void av_init_packet(AVPacket *pkt);
4395 
4396 /**
4397  * Allocate the payload of a packet and initialize its fields with
4398  * default values.
4399  *
4400  * @param pkt packet
4401  * @param size wanted payload size
4402  * @return 0 if OK, AVERROR_xxx otherwise
4403  */
4404 int av_new_packet(AVPacket *pkt, int size);
4405 
4406 /**
4407  * Reduce packet size, correctly zeroing padding
4408  *
4409  * @param pkt packet
4410  * @param size new size
4411  */
4412 void av_shrink_packet(AVPacket *pkt, int size);
4413 
4414 /**
4415  * Increase packet size, correctly zeroing padding
4416  *
4417  * @param pkt packet
4418  * @param grow_by number of bytes by which to increase the size of the packet
4419  */
4420 int av_grow_packet(AVPacket *pkt, int grow_by);
4421 
4422 /**
4423  * Initialize a reference-counted packet from av_malloc()ed data.
4424  *
4425  * @param pkt packet to be initialized. This function will set the data, size,
4426  * and buf fields, all others are left untouched.
4427  * @param data Data allocated by av_malloc() to be used as packet data. If this
4428  * function returns successfully, the data is owned by the underlying AVBuffer.
4429  * The caller may not access the data through other means.
4430  * @param size size of data in bytes, without the padding. I.e. the full buffer
4431  * size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
4432  *
4433  * @return 0 on success, a negative AVERROR on error
4434  */
4435 int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
4436 
4437 #if FF_API_AVPACKET_OLD_API
4438 /**
4439  * @warning This is a hack - the packet memory allocation stuff is broken. The
4440  * packet is allocated if it was not really allocated.
4441  *
4442  * @deprecated Use av_packet_ref or av_packet_make_refcounted
4443  */
4445 int av_dup_packet(AVPacket *pkt);
4446 /**
4447  * Copy packet, including contents
4448  *
4449  * @return 0 on success, negative AVERROR on fail
4450  *
4451  * @deprecated Use av_packet_ref
4452  */
4454 int av_copy_packet(AVPacket *dst, const AVPacket *src);
4455 
4456 /**
4457  * Copy packet side data
4458  *
4459  * @return 0 on success, negative AVERROR on fail
4460  *
4461  * @deprecated Use av_packet_copy_props
4462  */
4464 int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src);
4465 
4466 /**
4467  * Free a packet.
4468  *
4469  * @deprecated Use av_packet_unref
4470  *
4471  * @param pkt packet to free
4472  */
4474 void av_free_packet(AVPacket *pkt);
4475 #endif
4476 /**
4477  * Allocate new information of a packet.
4478  *
4479  * @param pkt packet
4480  * @param type side information type
4481  * @param size side information size
4482  * @return pointer to fresh allocated data or NULL otherwise
4483  */
4485  int size);
4486 
4487 /**
4488  * Wrap an existing array as a packet side data.
4489  *
4490  * @param pkt packet
4491  * @param type side information type
4492  * @param data the side data array. It must be allocated with the av_malloc()
4493  * family of functions. The ownership of the data is transferred to
4494  * pkt.
4495  * @param size side information size
4496  * @return a non-negative number on success, a negative AVERROR code on
4497  * failure. On failure, the packet is unchanged and the data remains
4498  * owned by the caller.
4499  */
4501  uint8_t *data, size_t size);
4502 
4503 /**
4504  * Shrink the already allocated side data buffer
4505  *
4506  * @param pkt packet
4507  * @param type side information type
4508  * @param size new side information size
4509  * @return 0 on success, < 0 on failure
4510  */
4512  int size);
4513 
4514 /**
4515  * Get side information from packet.
4516  *
4517  * @param pkt packet
4518  * @param type desired side information type
4519  * @param size pointer for side information size to store (optional)
4520  * @return pointer to data if present or NULL otherwise
4521  */
4522 uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
4523  int *size);
4524 
4525 #if FF_API_MERGE_SD_API
4528 
4531 #endif
4532 
4533 const char *av_packet_side_data_name(enum AVPacketSideDataType type);
4534 
4535 /**
4536  * Pack a dictionary for use in side_data.
4537  *
4538  * @param dict The dictionary to pack.
4539  * @param size pointer to store the size of the returned data
4540  * @return pointer to data if successful, NULL otherwise
4541  */
4542 uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size);
4543 /**
4544  * Unpack a dictionary from side_data.
4545  *
4546  * @param data data from side_data
4547  * @param size size of the data
4548  * @param dict the metadata storage dictionary
4549  * @return 0 on success, < 0 on failure
4550  */
4551 int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict);
4552 
4553 
4554 /**
4555  * Convenience function to free all the side data stored.
4556  * All the other fields stay untouched.
4557  *
4558  * @param pkt packet
4559  */
4561 
4562 /**
4563  * Setup a new reference to the data described by a given packet
4564  *
4565  * If src is reference-counted, setup dst as a new reference to the
4566  * buffer in src. Otherwise allocate a new buffer in dst and copy the
4567  * data from src into it.
4568  *
4569  * All the other fields are copied from src.
4570  *
4571  * @see av_packet_unref
4572  *
4573  * @param dst Destination packet
4574  * @param src Source packet
4575  *
4576  * @return 0 on success, a negative AVERROR on error.
4577  */
4578 int av_packet_ref(AVPacket *dst, const AVPacket *src);
4579 
4580 /**
4581  * Wipe the packet.
4582  *
4583  * Unreference the buffer referenced by the packet and reset the
4584  * remaining packet fields to their default values.
4585  *
4586  * @param pkt The packet to be unreferenced.
4587  */
4589 
4590 /**
4591  * Move every field in src to dst and reset src.
4592  *
4593  * @see av_packet_unref
4594  *
4595  * @param src Source packet, will be reset
4596  * @param dst Destination packet
4597  */
4598 void av_packet_move_ref(AVPacket *dst, AVPacket *src);
4599 
4600 /**
4601  * Copy only "properties" fields from src to dst.
4602  *
4603  * Properties for the purpose of this function are all the fields
4604  * beside those related to the packet data (buf, data, size)
4605  *
4606  * @param dst Destination packet
4607  * @param src Source packet
4608  *
4609  * @return 0 on success AVERROR on failure.
4610  */
4611 int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
4612 
4613 /**
4614  * Ensure the data described by a given packet is reference counted.
4615  *
4616  * @note This function does not ensure that the reference will be writable.
4617  * Use av_packet_make_writable instead for that purpose.
4618  *
4619  * @see av_packet_ref
4620  * @see av_packet_make_writable
4621  *
4622  * @param pkt packet whose data should be made reference counted.
4623  *
4624  * @return 0 on success, a negative AVERROR on error. On failure, the
4625  * packet is unchanged.
4626  */
4628 
4629 /**
4630  * Create a writable reference for the data described by a given packet,
4631  * avoiding data copy if possible.
4632  *
4633  * @param pkt Packet whose data should be made writable.
4634  *
4635  * @return 0 on success, a negative AVERROR on failure. On failure, the
4636  * packet is unchanged.
4637  */
4639 
4640 /**
4641  * Convert valid timing fields (timestamps / durations) in a packet from one
4642  * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
4643  * ignored.
4644  *
4645  * @param pkt packet on which the conversion will be performed
4646  * @param tb_src source timebase, in which the timing fields in pkt are
4647  * expressed
4648  * @param tb_dst destination timebase, to which the timing fields will be
4649  * converted
4650  */
4651 void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst);
4652 
4653 /**
4654  * @}
4655  */
4656 
4657 /**
4658  * @addtogroup lavc_decoding
4659  * @{
4660  */
4661 
4662 /**
4663  * Find a registered decoder with a matching codec ID.
4664  *
4665  * @param id AVCodecID of the requested decoder
4666  * @return A decoder if one was found, NULL otherwise.
4667  */
4669 
4670 /**
4671  * Find a registered decoder with the specified name.
4672  *
4673  * @param name name of the requested decoder
4674  * @return A decoder if one was found, NULL otherwise.
4675  */
4676 AVCodec *avcodec_find_decoder_by_name(const char *name);
4677 
4678 /**
4679  * The default callback for AVCodecContext.get_buffer2(). It is made public so
4680  * it can be called by custom get_buffer2() implementations for decoders without
4681  * AV_CODEC_CAP_DR1 set.
4682  */
4684 
4685 /**
4686  * Modify width and height values so that they will result in a memory
4687  * buffer that is acceptable for the codec if you do not use any horizontal
4688  * padding.
4689  *
4690  * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
4691  */
4693 
4694 /**
4695  * Modify width and height values so that they will result in a memory
4696  * buffer that is acceptable for the codec if you also ensure that all
4697  * line sizes are a multiple of the respective linesize_align[i].
4698  *
4699  * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
4700  */
4702  int linesize_align[AV_NUM_DATA_POINTERS]);
4703 
4704 /**
4705  * Converts AVChromaLocation to swscale x/y chroma position.
4706  *
4707  * The positions represent the chroma (0,0) position in a coordinates system
4708  * with luma (0,0) representing the origin and luma(1,1) representing 256,256
4709  *
4710  * @param xpos horizontal chroma sample position
4711  * @param ypos vertical chroma sample position
4712  */
4713 int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
4714 
4715 /**
4716  * Converts swscale x/y chroma position to AVChromaLocation.
4717  *
4718  * The positions represent the chroma (0,0) position in a coordinates system
4719  * with luma (0,0) representing the origin and luma(1,1) representing 256,256
4720  *
4721  * @param xpos horizontal chroma sample position
4722  * @param ypos vertical chroma sample position
4723  */
4724 enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos);
4725 
4726 /**
4727  * Decode the audio frame of size avpkt->size from avpkt->data into frame.
4728  *
4729  * Some decoders may support multiple frames in a single AVPacket. Such
4730  * decoders would then just decode the first frame and the return value would be
4731  * less than the packet size. In this case, avcodec_decode_audio4 has to be
4732  * called again with an AVPacket containing the remaining data in order to
4733  * decode the second frame, etc... Even if no frames are returned, the packet
4734  * needs to be fed to the decoder with remaining data until it is completely
4735  * consumed or an error occurs.
4736  *
4737  * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
4738  * and output. This means that for some packets they will not immediately
4739  * produce decoded output and need to be flushed at the end of decoding to get
4740  * all the decoded data. Flushing is done by calling this function with packets
4741  * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
4742  * returning samples. It is safe to flush even those decoders that are not
4743  * marked with AV_CODEC_CAP_DELAY, then no samples will be returned.
4744  *
4745  * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
4746  * larger than the actual read bytes because some optimized bitstream
4747  * readers read 32 or 64 bits at once and could read over the end.
4748  *
4749  * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4750  * before packets may be fed to the decoder.
4751  *
4752  * @param avctx the codec context
4753  * @param[out] frame The AVFrame in which to store decoded audio samples.
4754  * The decoder will allocate a buffer for the decoded frame by
4755  * calling the AVCodecContext.get_buffer2() callback.
4756  * When AVCodecContext.refcounted_frames is set to 1, the frame is
4757  * reference counted and the returned reference belongs to the
4758  * caller. The caller must release the frame using av_frame_unref()
4759  * when the frame is no longer needed. The caller may safely write
4760  * to the frame if av_frame_is_writable() returns 1.
4761  * When AVCodecContext.refcounted_frames is set to 0, the returned
4762  * reference belongs to the decoder and is valid only until the
4763  * next call to this function or until closing or flushing the
4764  * decoder. The caller may not write to it.
4765  * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
4766  * non-zero. Note that this field being set to zero
4767  * does not mean that an error has occurred. For
4768  * decoders with AV_CODEC_CAP_DELAY set, no given decode
4769  * call is guaranteed to produce a frame.
4770  * @param[in] avpkt The input AVPacket containing the input buffer.
4771  * At least avpkt->data and avpkt->size should be set. Some
4772  * decoders might also require additional fields to be set.
4773  * @return A negative error code is returned if an error occurred during
4774  * decoding, otherwise the number of bytes consumed from the input
4775  * AVPacket is returned.
4776  *
4777 * @deprecated Use avcodec_send_packet() and avcodec_receive_frame().
4778  */
4781  int *got_frame_ptr, const AVPacket *avpkt);
4782 
4783 /**
4784  * Decode the video frame of size avpkt->size from avpkt->data into picture.
4785  * Some decoders may support multiple frames in a single AVPacket, such
4786  * decoders would then just decode the first frame.
4787  *
4788  * @warning The input buffer must be AV_INPUT_BUFFER_PADDING_SIZE larger than
4789  * the actual read bytes because some optimized bitstream readers read 32 or 64
4790  * bits at once and could read over the end.
4791  *
4792  * @warning The end of the input buffer buf should be set to 0 to ensure that
4793  * no overreading happens for damaged MPEG streams.
4794  *
4795  * @note Codecs which have the AV_CODEC_CAP_DELAY capability set have a delay
4796  * between input and output, these need to be fed with avpkt->data=NULL,
4797  * avpkt->size=0 at the end to return the remaining frames.
4798  *
4799  * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4800  * before packets may be fed to the decoder.
4801  *
4802  * @param avctx the codec context
4803  * @param[out] picture The AVFrame in which the decoded video frame will be stored.
4804  * Use av_frame_alloc() to get an AVFrame. The codec will
4805  * allocate memory for the actual bitmap by calling the
4806  * AVCodecContext.get_buffer2() callback.
4807  * When AVCodecContext.refcounted_frames is set to 1, the frame is
4808  * reference counted and the returned reference belongs to the
4809  * caller. The caller must release the frame using av_frame_unref()
4810  * when the frame is no longer needed. The caller may safely write
4811  * to the frame if av_frame_is_writable() returns 1.
4812  * When AVCodecContext.refcounted_frames is set to 0, the returned
4813  * reference belongs to the decoder and is valid only until the
4814  * next call to this function or until closing or flushing the
4815  * decoder. The caller may not write to it.
4816  *
4817  * @param[in] avpkt The input AVPacket containing the input buffer.
4818  * You can create such packet with av_init_packet() and by then setting
4819  * data and size, some decoders might in addition need other fields like
4820  * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
4821  * fields possible.
4822  * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
4823  * @return On error a negative value is returned, otherwise the number of bytes
4824  * used or zero if no frame could be decompressed.
4825  *
4826  * @deprecated Use avcodec_send_packet() and avcodec_receive_frame().
4827  */
4829 int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
4830  int *got_picture_ptr,
4831  const AVPacket *avpkt);
4832 
4833 /**
4834  * Decode a subtitle message.
4835  * Return a negative value on error, otherwise return the number of bytes used.
4836  * If no subtitle could be decompressed, got_sub_ptr is zero.
4837  * Otherwise, the subtitle is stored in *sub.
4838  * Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for
4839  * simplicity, because the performance difference is expect to be negligible
4840  * and reusing a get_buffer written for video codecs would probably perform badly
4841  * due to a potentially very different allocation pattern.
4842  *
4843  * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
4844  * and output. This means that for some packets they will not immediately
4845  * produce decoded output and need to be flushed at the end of decoding to get
4846  * all the decoded data. Flushing is done by calling this function with packets
4847  * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
4848  * returning subtitles. It is safe to flush even those decoders that are not
4849  * marked with AV_CODEC_CAP_DELAY, then no subtitles will be returned.
4850  *
4851  * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4852  * before packets may be fed to the decoder.
4853  *
4854  * @param avctx the codec context
4855  * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored,
4856  * must be freed with avsubtitle_free if *got_sub_ptr is set.
4857  * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
4858  * @param[in] avpkt The input AVPacket containing the input buffer.
4859  */
4861  int *got_sub_ptr,
4862  AVPacket *avpkt);
4863 
4864 /**
4865  * Supply raw packet data as input to a decoder.
4866  *
4867  * Internally, this call will copy relevant AVCodecContext fields, which can
4868  * influence decoding per-packet, and apply them when the packet is actually
4869  * decoded. (For example AVCodecContext.skip_frame, which might direct the
4870  * decoder to drop the frame contained by the packet sent with this function.)
4871  *
4872  * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
4873  * larger than the actual read bytes because some optimized bitstream
4874  * readers read 32 or 64 bits at once and could read over the end.
4875  *
4876  * @warning Do not mix this API with the legacy API (like avcodec_decode_video2())
4877  * on the same AVCodecContext. It will return unexpected results now
4878  * or in future libavcodec versions.
4879  *
4880  * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4881  * before packets may be fed to the decoder.
4882  *
4883  * @param avctx codec context
4884  * @param[in] avpkt The input AVPacket. Usually, this will be a single video
4885  * frame, or several complete audio frames.
4886  * Ownership of the packet remains with the caller, and the
4887  * decoder will not write to the packet. The decoder may create
4888  * a reference to the packet data (or copy it if the packet is
4889  * not reference-counted).
4890  * Unlike with older APIs, the packet is always fully consumed,
4891  * and if it contains multiple frames (e.g. some audio codecs),
4892  * will require you to call avcodec_receive_frame() multiple
4893  * times afterwards before you can send a new packet.
4894  * It can be NULL (or an AVPacket with data set to NULL and
4895  * size set to 0); in this case, it is considered a flush
4896  * packet, which signals the end of the stream. Sending the
4897  * first flush packet will return success. Subsequent ones are
4898  * unnecessary and will return AVERROR_EOF. If the decoder
4899  * still has frames buffered, it will return them after sending
4900  * a flush packet.
4901  *
4902  * @return 0 on success, otherwise negative error code:
4903  * AVERROR(EAGAIN): input is not accepted in the current state - user
4904  * must read output with avcodec_receive_frame() (once
4905  * all output is read, the packet should be resent, and
4906  * the call will not fail with EAGAIN).
4907  * AVERROR_EOF: the decoder has been flushed, and no new packets can
4908  * be sent to it (also returned if more than 1 flush
4909  * packet is sent)
4910  * AVERROR(EINVAL): codec not opened, it is an encoder, or requires flush
4911  * AVERROR(ENOMEM): failed to add packet to internal queue, or similar
4912  * other errors: legitimate decoding errors
4913  */
4914 int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt);
4915 
4916 /**
4917  * Return decoded output data from a decoder.
4918  *
4919  * @param avctx codec context
4920  * @param frame This will be set to a reference-counted video or audio
4921  * frame (depending on the decoder type) allocated by the
4922  * decoder. Note that the function will always call
4923  * av_frame_unref(frame) before doing anything else.
4924  *
4925  * @return
4926  * 0: success, a frame was returned
4927  * AVERROR(EAGAIN): output is not available in this state - user must try
4928  * to send new input
4929  * AVERROR_EOF: the decoder has been fully flushed, and there will be
4930  * no more output frames
4931  * AVERROR(EINVAL): codec not opened, or it is an encoder
4932  * AVERROR_INPUT_CHANGED: current decoded frame has changed parameters
4933  * with respect to first decoded frame. Applicable
4934  * when flag AV_CODEC_FLAG_DROPCHANGED is set.
4935  * other negative values: legitimate decoding errors
4936  */
4938 
4939 /**
4940  * Supply a raw video or audio frame to the encoder. Use avcodec_receive_packet()
4941  * to retrieve buffered output packets.
4942  *
4943  * @param avctx codec context
4944  * @param[in] frame AVFrame containing the raw audio or video frame to be encoded.
4945  * Ownership of the frame remains with the caller, and the
4946  * encoder will not write to the frame. The encoder may create
4947  * a reference to the frame data (or copy it if the frame is
4948  * not reference-counted).
4949  * It can be NULL, in which case it is considered a flush
4950  * packet. This signals the end of the stream. If the encoder
4951  * still has packets buffered, it will return them after this
4952  * call. Once flushing mode has been entered, additional flush
4953  * packets are ignored, and sending frames will return
4954  * AVERROR_EOF.
4955  *
4956  * For audio:
4957  * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
4958  * can have any number of samples.
4959  * If it is not set, frame->nb_samples must be equal to
4960  * avctx->frame_size for all frames except the last.
4961  * The final frame may be smaller than avctx->frame_size.
4962  * @return 0 on success, otherwise negative error code:
4963  * AVERROR(EAGAIN): input is not accepted in the current state - user
4964  * must read output with avcodec_receive_packet() (once
4965  * all output is read, the packet should be resent, and
4966  * the call will not fail with EAGAIN).
4967  * AVERROR_EOF: the encoder has been flushed, and no new frames can
4968  * be sent to it
4969  * AVERROR(EINVAL): codec not opened, refcounted_frames not set, it is a
4970  * decoder, or requires flush
4971  * AVERROR(ENOMEM): failed to add packet to internal queue, or similar
4972  * other errors: legitimate decoding errors
4973  */
4974 int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame);
4975 
4976 /**
4977  * Read encoded data from the encoder.
4978  *
4979  * @param avctx codec context
4980  * @param avpkt This will be set to a reference-counted packet allocated by the
4981  * encoder. Note that the function will always call
4982  * av_frame_unref(frame) before doing anything else.
4983  * @return 0 on success, otherwise negative error code:
4984  * AVERROR(EAGAIN): output is not available in the current state - user
4985  * must try to send input
4986  * AVERROR_EOF: the encoder has been fully flushed, and there will be
4987  * no more output packets
4988  * AVERROR(EINVAL): codec not opened, or it is an encoder
4989  * other errors: legitimate decoding errors
4990  */
4991 int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt);
4992 
4993 /**
4994  * Create and return a AVHWFramesContext with values adequate for hardware
4995  * decoding. This is meant to get called from the get_format callback, and is
4996  * a helper for preparing a AVHWFramesContext for AVCodecContext.hw_frames_ctx.
4997  * This API is for decoding with certain hardware acceleration modes/APIs only.
4998  *
4999  * The returned AVHWFramesContext is not initialized. The caller must do this
5000  * with av_hwframe_ctx_init().
5001  *
5002  * Calling this function is not a requirement, but makes it simpler to avoid
5003  * codec or hardware API specific details when manually allocating frames.
5004  *
5005  * Alternatively to this, an API user can set AVCodecContext.hw_device_ctx,
5006  * which sets up AVCodecContext.hw_frames_ctx fully automatically, and makes
5007  * it unnecessary to call this function or having to care about
5008  * AVHWFramesContext initialization at all.
5009  *
5010  * There are a number of requirements for calling this function:
5011  *
5012  * - It must be called from get_format with the same avctx parameter that was
5013  * passed to get_format. Calling it outside of get_format is not allowed, and
5014  * can trigger undefined behavior.
5015  * - The function is not always supported (see description of return values).
5016  * Even if this function returns successfully, hwaccel initialization could
5017  * fail later. (The degree to which implementations check whether the stream
5018  * is actually supported varies. Some do this check only after the user's
5019  * get_format callback returns.)
5020  * - The hw_pix_fmt must be one of the choices suggested by get_format. If the
5021  * user decides to use a AVHWFramesContext prepared with this API function,
5022  * the user must return the same hw_pix_fmt from get_format.
5023  * - The device_ref passed to this function must support the given hw_pix_fmt.
5024  * - After calling this API function, it is the user's responsibility to
5025  * initialize the AVHWFramesContext (returned by the out_frames_ref parameter),
5026  * and to set AVCodecContext.hw_frames_ctx to it. If done, this must be done
5027  * before returning from get_format (this is implied by the normal
5028  * AVCodecContext.hw_frames_ctx API rules).
5029  * - The AVHWFramesContext parameters may change every time time get_format is
5030  * called. Also, AVCodecContext.hw_frames_ctx is reset before get_format. So
5031  * you are inherently required to go through this process again on every
5032  * get_format call.
5033  * - It is perfectly possible to call this function without actually using
5034  * the resulting AVHWFramesContext. One use-case might be trying to reuse a
5035  * previously initialized AVHWFramesContext, and calling this API function
5036  * only to test whether the required frame parameters have changed.
5037  * - Fields that use dynamically allocated values of any kind must not be set
5038  * by the user unless setting them is explicitly allowed by the documentation.
5039  * If the user sets AVHWFramesContext.free and AVHWFramesContext.user_opaque,
5040  * the new free callback must call the potentially set previous free callback.
5041  * This API call may set any dynamically allocated fields, including the free
5042  * callback.
5043  *
5044  * The function will set at least the following fields on AVHWFramesContext
5045  * (potentially more, depending on hwaccel API):
5046  *
5047  * - All fields set by av_hwframe_ctx_alloc().
5048  * - Set the format field to hw_pix_fmt.
5049  * - Set the sw_format field to the most suited and most versatile format. (An
5050  * implication is that this will prefer generic formats over opaque formats
5051  * with arbitrary restrictions, if possible.)
5052  * - Set the width/height fields to the coded frame size, rounded up to the
5053  * API-specific minimum alignment.
5054  * - Only _if_ the hwaccel requires a pre-allocated pool: set the initial_pool_size
5055  * field to the number of maximum reference surfaces possible with the codec,
5056  * plus 1 surface for the user to work (meaning the user can safely reference
5057  * at most 1 decoded surface at a time), plus additional buffering introduced
5058  * by frame threading. If the hwaccel does not require pre-allocation, the
5059  * field is left to 0, and the decoder will allocate new surfaces on demand
5060  * during decoding.
5061  * - Possibly AVHWFramesContext.hwctx fields, depending on the underlying
5062  * hardware API.
5063  *
5064  * Essentially, out_frames_ref returns the same as av_hwframe_ctx_alloc(), but
5065  * with basic frame parameters set.
5066  *
5067  * The function is stateless, and does not change the AVCodecContext or the
5068  * device_ref AVHWDeviceContext.
5069  *
5070  * @param avctx The context which is currently calling get_format, and which
5071  * implicitly contains all state needed for filling the returned
5072  * AVHWFramesContext properly.
5073  * @param device_ref A reference to the AVHWDeviceContext describing the device
5074  * which will be used by the hardware decoder.
5075  * @param hw_pix_fmt The hwaccel format you are going to return from get_format.
5076  * @param out_frames_ref On success, set to a reference to an _uninitialized_
5077  * AVHWFramesContext, created from the given device_ref.
5078  * Fields will be set to values required for decoding.
5079  * Not changed if an error is returned.
5080  * @return zero on success, a negative value on error. The following error codes
5081  * have special semantics:
5082  * AVERROR(ENOENT): the decoder does not support this functionality. Setup
5083  * is always manual, or it is a decoder which does not
5084  * support setting AVCodecContext.hw_frames_ctx at all,
5085  * or it is a software format.
5086  * AVERROR(EINVAL): it is known that hardware decoding is not supported for
5087  * this configuration, or the device_ref is not supported
5088  * for the hwaccel referenced by hw_pix_fmt.
5089  */
5091  AVBufferRef *device_ref,
5093  AVBufferRef **out_frames_ref);
5094 
5095 
5096 
5097 /**
5098  * @defgroup lavc_parsing Frame parsing
5099  * @{
5100  */
5101 
5104  AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field
5105  AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field
5106  AV_PICTURE_STRUCTURE_FRAME, //< coded as frame
5107 };
5108 
5109 typedef struct AVCodecParserContext {
5110  void *priv_data;
5112  int64_t frame_offset; /* offset of the current frame */
5113  int64_t cur_offset; /* current offset
5114  (incremented by each av_parser_parse()) */
5115  int64_t next_frame_offset; /* offset of the next frame */
5116  /* video info */
5117  int pict_type; /* XXX: Put it back in AVCodecContext. */
5118  /**
5119  * This field is used for proper frame duration computation in lavf.
5120  * It signals, how much longer the frame duration of the current frame
5121  * is compared to normal frame duration.
5122  *
5123  * frame_duration = (1 + repeat_pict) * time_base
5124  *
5125  * It is used by codecs like H.264 to display telecined material.
5126  */
5127  int repeat_pict; /* XXX: Put it back in AVCodecContext. */
5128  int64_t pts; /* pts of the current frame */
5129  int64_t dts; /* dts of the current frame */
5130 
5131  /* private data */
5132  int64_t last_pts;
5133  int64_t last_dts;
5135 
5136 #define AV_PARSER_PTS_NB 4
5141 
5142  int flags;
5143 #define PARSER_FLAG_COMPLETE_FRAMES 0x0001
5144 #define PARSER_FLAG_ONCE 0x0002
5145 /// Set if the parser has a valid file offset
5146 #define PARSER_FLAG_FETCHED_OFFSET 0x0004
5147 #define PARSER_FLAG_USE_CODEC_TS 0x1000
5148 
5149  int64_t offset; ///< byte offset from starting packet start
5151 
5152  /**
5153  * Set by parser to 1 for key frames and 0 for non-key frames.
5154  * It is initialized to -1, so if the parser doesn't set this flag,
5155  * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
5156  * will be used.
5157  */
5159 
5160 #if FF_API_CONVERGENCE_DURATION
5161  /**
5162  * @deprecated unused
5163  */
5166 #endif
5167 
5168  // Timestamp generation support:
5169  /**
5170  * Synchronization point for start of timestamp generation.
5171  *
5172  * Set to >0 for sync point, 0 for no sync point and <0 for undefined
5173  * (default).
5174  *
5175  * For example, this corresponds to presence of H.264 buffering period
5176  * SEI message.
5177  */
5179 
5180  /**
5181  * Offset of the current timestamp against last timestamp sync point in
5182  * units of AVCodecContext.time_base.
5183  *
5184  * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
5185  * contain a valid timestamp offset.
5186  *
5187  * Note that the timestamp of sync point has usually a nonzero
5188  * dts_ref_dts_delta, which refers to the previous sync point. Offset of
5189  * the next frame after timestamp sync point will be usually 1.
5190  *
5191  * For example, this corresponds to H.264 cpb_removal_delay.
5192  */
5194 
5195  /**
5196  * Presentation delay of current frame in units of AVCodecContext.time_base.
5197  *
5198  * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
5199  * contain valid non-negative timestamp delta (presentation time of a frame
5200  * must not lie in the past).
5201  *
5202  * This delay represents the difference between decoding and presentation
5203  * time of the frame.
5204  *
5205  * For example, this corresponds to H.264 dpb_output_delay.
5206  */
5208 
5209  /**
5210  * Position of the packet in file.
5211  *
5212  * Analogous to cur_frame_pts/dts
5213  */
5215 
5216  /**
5217  * Byte position of currently parsed frame in stream.
5218  */
5219  int64_t pos;
5220 
5221  /**
5222  * Previous frame byte position.
5223  */
5224  int64_t last_pos;
5225 
5226  /**
5227  * Duration of the current frame.
5228  * For audio, this is in units of 1 / AVCodecContext.sample_rate.
5229  * For all other types, this is in units of AVCodecContext.time_base.
5230  */
5232 
5234 
5235  /**
5236  * Indicate whether a picture is coded as a frame, top field or bottom field.
5237  *
5238  * For example, H.264 field_pic_flag equal to 0 corresponds to
5239  * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
5240  * equal to 1 and bottom_field_flag equal to 0 corresponds to
5241  * AV_PICTURE_STRUCTURE_TOP_FIELD.
5242  */
5244 
5245  /**
5246  * Picture number incremented in presentation or output order.
5247  * This field may be reinitialized at the first picture of a new sequence.
5248  *
5249  * For example, this corresponds to H.264 PicOrderCnt.
5250  */
5252 
5253  /**
5254  * Dimensions of the decoded video intended for presentation.
5255  */
5256  int width;
5257  int height;
5258 
5259  /**
5260  * Dimensions of the coded video.
5261  */
5264 
5265  /**
5266  * The format of the coded data, corresponds to enum AVPixelFormat for video
5267  * and for enum AVSampleFormat for audio.
5268  *
5269  * Note that a decoder can have considerable freedom in how exactly it
5270  * decodes the data, so the format reported here might be different from the
5271  * one returned by a decoder.
5272  */
5273  int format;
5275 
5276 typedef struct AVCodecParser {
5277  int codec_ids[5]; /* several codec IDs are permitted */
5280  /* This callback never returns an error, a negative value means that
5281  * the frame start was in a previous packet. */
5283  AVCodecContext *avctx,
5284  const uint8_t **poutbuf, int *poutbuf_size,
5285  const uint8_t *buf, int buf_size);
5287  int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
5289 } AVCodecParser;
5290 
5291 /**
5292  * Iterate over all registered codec parsers.
5293  *
5294  * @param opaque a pointer where libavcodec will store the iteration state. Must
5295  * point to NULL to start the iteration.
5296  *
5297  * @return the next registered codec parser or NULL when the iteration is
5298  * finished
5299  */
5300 const AVCodecParser *av_parser_iterate(void **opaque);
5301 
5304 
5307 AVCodecParserContext *av_parser_init(int codec_id);
5308 
5309 /**
5310  * Parse a packet.
5311  *
5312  * @param s parser context.
5313  * @param avctx codec context.
5314  * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
5315  * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
5316  * @param buf input buffer.
5317  * @param buf_size buffer size in bytes without the padding. I.e. the full buffer
5318  size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE.
5319  To signal EOF, this should be 0 (so that the last frame
5320  can be output).
5321  * @param pts input presentation timestamp.
5322  * @param dts input decoding timestamp.
5323  * @param pos input byte position in stream.
5324  * @return the number of bytes of the input bitstream used.
5325  *
5326  * Example:
5327  * @code
5328  * while(in_len){
5329  * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
5330  * in_data, in_len,
5331  * pts, dts, pos);
5332  * in_data += len;
5333  * in_len -= len;
5334  *
5335  * if(size)
5336  * decode_frame(data, size);
5337  * }
5338  * @endcode
5339  */
5341  AVCodecContext *avctx,
5342  uint8_t **poutbuf, int *poutbuf_size,
5343  const uint8_t *buf, int buf_size,
5344  int64_t pts, int64_t dts,
5345  int64_t pos);
5346 
5347 /**
5348  * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
5349  * @deprecated use AVBitStreamFilter
5350  */
5352  AVCodecContext *avctx,
5353  uint8_t **poutbuf, int *poutbuf_size,
5354  const uint8_t *buf, int buf_size, int keyframe);
5356 
5357 /**
5358  * @}
5359  * @}
5360  */
5361 
5362 /**
5363  * @addtogroup lavc_encoding
5364  * @{
5365  */
5366 
5367 /**
5368  * Find a registered encoder with a matching codec ID.
5369  *
5370  * @param id AVCodecID of the requested encoder
5371  * @return An encoder if one was found, NULL otherwise.
5372  */
5374 
5375 /**
5376  * Find a registered encoder with the specified name.
5377  *
5378  * @param name name of the requested encoder
5379  * @return An encoder if one was found, NULL otherwise.
5380  */
5381 AVCodec *avcodec_find_encoder_by_name(const char *name);
5382 
5383 /**
5384  * Encode a frame of audio.
5385  *
5386  * Takes input samples from frame and writes the next output packet, if
5387  * available, to avpkt. The output packet does not necessarily contain data for
5388  * the most recent frame, as encoders can delay, split, and combine input frames
5389  * internally as needed.
5390  *
5391  * @param avctx codec context
5392  * @param avpkt output AVPacket.
5393  * The user can supply an output buffer by setting
5394  * avpkt->data and avpkt->size prior to calling the
5395  * function, but if the size of the user-provided data is not
5396  * large enough, encoding will fail. If avpkt->data and
5397  * avpkt->size are set, avpkt->destruct must also be set. All
5398  * other AVPacket fields will be reset by the encoder using
5399  * av_init_packet(). If avpkt->data is NULL, the encoder will
5400  * allocate it. The encoder will set avpkt->size to the size
5401  * of the output packet.
5402  *
5403  * If this function fails or produces no output, avpkt will be
5404  * freed using av_packet_unref().
5405  * @param[in] frame AVFrame containing the raw audio data to be encoded.
5406  * May be NULL when flushing an encoder that has the
5407  * AV_CODEC_CAP_DELAY capability set.
5408  * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
5409  * can have any number of samples.
5410  * If it is not set, frame->nb_samples must be equal to
5411  * avctx->frame_size for all frames except the last.
5412  * The final frame may be smaller than avctx->frame_size.
5413  * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
5414  * output packet is non-empty, and to 0 if it is
5415  * empty. If the function returns an error, the
5416  * packet can be assumed to be invalid, and the
5417  * value of got_packet_ptr is undefined and should
5418  * not be used.
5419  * @return 0 on success, negative error code on failure
5420  *
5421  * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead
5422  */
5424 int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt,
5425  const AVFrame *frame, int *got_packet_ptr);
5426 
5427 /**
5428  * Encode a frame of video.
5429  *
5430  * Takes input raw video data from frame and writes the next output packet, if
5431  * available, to avpkt. The output packet does not necessarily contain data for
5432  * the most recent frame, as encoders can delay and reorder input frames
5433  * internally as needed.
5434  *
5435  * @param avctx codec context
5436  * @param avpkt output AVPacket.
5437  * The user can supply an output buffer by setting
5438  * avpkt->data and avpkt->size prior to calling the
5439  * function, but if the size of the user-provided data is not
5440  * large enough, encoding will fail. All other AVPacket fields
5441  * will be reset by the encoder using av_init_packet(). If
5442  * avpkt->data is NULL, the encoder will allocate it.
5443  * The encoder will set avpkt->size to the size of the
5444  * output packet. The returned data (if any) belongs to the
5445  * caller, he is responsible for freeing it.
5446  *
5447  * If this function fails or produces no output, avpkt will be
5448  * freed using av_packet_unref().
5449  * @param[in] frame AVFrame containing the raw video data to be encoded.
5450  * May be NULL when flushing an encoder that has the
5451  * AV_CODEC_CAP_DELAY capability set.
5452  * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
5453  * output packet is non-empty, and to 0 if it is
5454  * empty. If the function returns an error, the
5455  * packet can be assumed to be invalid, and the
5456  * value of got_packet_ptr is undefined and should
5457  * not be used.
5458  * @return 0 on success, negative error code on failure
5459  *
5460  * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead
5461  */
5463 int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
5464  const AVFrame *frame, int *got_packet_ptr);
5465 
5466 int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
5467  const AVSubtitle *sub);
5468 
5469 
5470 /**
5471  * @}
5472  */
5473 
5474 #if FF_API_AVPICTURE
5475 /**
5476  * @addtogroup lavc_picture
5477  * @{
5478  */
5479 
5480 /**
5481  * @deprecated unused
5482  */
5484 int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height);
5485 
5486 /**
5487  * @deprecated unused
5488  */
5490 void avpicture_free(AVPicture *picture);
5491 
5492 /**
5493  * @deprecated use av_image_fill_arrays() instead.
5494  */
5496 int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
5497  enum AVPixelFormat pix_fmt, int width, int height);
5498 
5499 /**
5500  * @deprecated use av_image_copy_to_buffer() instead.
5501  */
5503 int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt,
5504  int width, int height,
5505  unsigned char *dest, int dest_size);
5506 
5507 /**
5508  * @deprecated use av_image_get_buffer_size() instead.
5509  */
5512 
5513 /**
5514  * @deprecated av_image_copy() instead.
5515  */
5517 void av_picture_copy(AVPicture *dst, const AVPicture *src,
5518  enum AVPixelFormat pix_fmt, int width, int height);
5519 
5520 /**
5521  * @deprecated unused
5522  */
5524 int av_picture_crop(AVPicture *dst, const AVPicture *src,
5525  enum AVPixelFormat pix_fmt, int top_band, int left_band);
5526 
5527 /**
5528  * @deprecated unused
5529  */
5531 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt,
5532  int padtop, int padbottom, int padleft, int padright, int *color);
5533 
5534 /**
5535  * @}
5536  */
5537 #endif
5538 
5539 /**
5540  * @defgroup lavc_misc Utility functions
5541  * @ingroup libavc
5542  *
5543  * Miscellaneous utility functions related to both encoding and decoding
5544  * (or neither).
5545  * @{
5546  */
5547 
5548 /**
5549  * @defgroup lavc_misc_pixfmt Pixel formats
5550  *
5551  * Functions for working with pixel formats.
5552  * @{
5553  */
5554 
5555 #if FF_API_GETCHROMA
5556 /**
5557  * @deprecated Use av_pix_fmt_get_chroma_sub_sample
5558  */
5559 
5561 void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
5562 #endif
5563 
5564 /**
5565  * Return a value representing the fourCC code associated to the
5566  * pixel format pix_fmt, or 0 if no associated fourCC code can be
5567  * found.
5568  */
5570 
5571 /**
5572  * @deprecated see av_get_pix_fmt_loss()
5573  */
5574 int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
5575  int has_alpha);
5576 
5577 /**
5578  * Find the best pixel format to convert to given a certain source pixel
5579  * format. When converting from one pixel format to another, information loss
5580  * may occur. For example, when converting from RGB24 to GRAY, the color
5581  * information will be lost. Similarly, other losses occur when converting from
5582  * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of
5583  * the given pixel formats should be used to suffer the least amount of loss.
5584  * The pixel formats from which it chooses one, are determined by the
5585  * pix_fmt_list parameter.
5586  *
5587  *
5588  * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
5589  * @param[in] src_pix_fmt source pixel format
5590  * @param[in] has_alpha Whether the source pixel format alpha channel is used.
5591  * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
5592  * @return The best pixel format to convert to or -1 if none was found.
5593  */
5594 enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
5595  enum AVPixelFormat src_pix_fmt,
5596  int has_alpha, int *loss_ptr);
5597 
5598 /**
5599  * @deprecated see av_find_best_pix_fmt_of_2()
5600  */
5601 enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
5602  enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
5603 
5605 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
5606  enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
5607 
5608 enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
5609 
5610 /**
5611  * @}
5612  */
5613 
5614 #if FF_API_TAG_STRING
5615 /**
5616  * Put a string representing the codec tag codec_tag in buf.
5617  *
5618  * @param buf buffer to place codec tag in
5619  * @param buf_size size in bytes of buf
5620  * @param codec_tag codec tag to assign
5621  * @return the length of the string that would have been generated if
5622  * enough space had been available, excluding the trailing null
5623  *
5624  * @deprecated see av_fourcc_make_string() and av_fourcc2str().
5625  */
5627 size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
5628 #endif
5629 
5630 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
5631 
5632 /**
5633  * Return a name for the specified profile, if available.
5634  *
5635  * @param codec the codec that is searched for the given profile
5636  * @param profile the profile value for which a name is requested
5637  * @return A name for the profile if found, NULL otherwise.
5638  */
5639 const char *av_get_profile_name(const AVCodec *codec, int profile);
5640 
5641 /**
5642  * Return a name for the specified profile, if available.
5643  *
5644  * @param codec_id the ID of the codec to which the requested profile belongs
5645  * @param profile the profile value for which a name is requested
5646  * @return A name for the profile if found, NULL otherwise.
5647  *
5648  * @note unlike av_get_profile_name(), which searches a list of profiles
5649  * supported by a specific decoder or encoder implementation, this
5650  * function searches the list of profiles from the AVCodecDescriptor
5651  */
5652 const char *avcodec_profile_name(enum AVCodecID codec_id, int profile);
5653 
5654 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
5655 int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
5656 //FIXME func typedef
5657 
5658 /**
5659  * Fill AVFrame audio data and linesize pointers.
5660  *
5661  * The buffer buf must be a preallocated buffer with a size big enough
5662  * to contain the specified samples amount. The filled AVFrame data
5663  * pointers will point to this buffer.
5664  *
5665  * AVFrame extended_data channel pointers are allocated if necessary for
5666  * planar audio.
5667  *
5668  * @param frame the AVFrame
5669  * frame->nb_samples must be set prior to calling the
5670  * function. This function fills in frame->data,
5671  * frame->extended_data, frame->linesize[0].
5672  * @param nb_channels channel count
5673  * @param sample_fmt sample format
5674  * @param buf buffer to use for frame data
5675  * @param buf_size size of buffer
5676  * @param align plane size sample alignment (0 = default)
5677  * @return >=0 on success, negative error code on failure
5678  * @todo return the size in bytes required to store the samples in
5679  * case of success, at the next libavutil bump
5680  */
5681 int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels,
5682  enum AVSampleFormat sample_fmt, const uint8_t *buf,
5683  int buf_size, int align);
5684 
5685 /**
5686  * Reset the internal decoder state / flush internal buffers. Should be called
5687  * e.g. when seeking or when switching to a different stream.
5688  *
5689  * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0),
5690  * this invalidates the frames previously returned from the decoder. When
5691  * refcounted frames are used, the decoder just releases any references it might
5692  * keep internally, but the caller's reference remains valid.
5693  */
5695 
5696 /**
5697  * Return codec bits per sample.
5698  *
5699  * @param[in] codec_id the codec
5700  * @return Number of bits per sample or zero if unknown for the given codec.
5701  */
5702 int av_get_bits_per_sample(enum AVCodecID codec_id);
5703 
5704 /**
5705  * Return the PCM codec associated with a sample format.
5706  * @param be endianness, 0 for little, 1 for big,
5707  * -1 (or anything else) for native
5708  * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
5709  */
5710 enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be);
5711 
5712 /**
5713  * Return codec bits per sample.
5714  * Only return non-zero if the bits per sample is exactly correct, not an
5715  * approximation.
5716  *
5717  * @param[in] codec_id the codec
5718  * @return Number of bits per sample or zero if unknown for the given codec.
5719  */
5720 int av_get_exact_bits_per_sample(enum AVCodecID codec_id);
5721 
5722 /**
5723  * Return audio frame duration.
5724  *
5725  * @param avctx codec context
5726  * @param frame_bytes size of the frame, or 0 if unknown
5727  * @return frame duration, in samples, if known. 0 if not able to
5728  * determine.
5729  */
5730 int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
5731 
5732 /**
5733  * This function is the same as av_get_audio_frame_duration(), except it works
5734  * with AVCodecParameters instead of an AVCodecContext.
5735  */
5736 int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes);
5737 
5738 #if FF_API_OLD_BSF
5740  void *priv_data;
5741  const struct AVBitStreamFilter *filter;
5744  /**
5745  * Internal default arguments, used if NULL is passed to av_bitstream_filter_filter().
5746  * Not for access by library users.
5747  */
5748  char *args;
5750 #endif
5751 
5753 
5754 /**
5755  * The bitstream filter state.
5756  *
5757  * This struct must be allocated with av_bsf_alloc() and freed with
5758  * av_bsf_free().
5759  *
5760  * The fields in the struct will only be changed (by the caller or by the
5761  * filter) as described in their documentation, and are to be considered
5762  * immutable otherwise.
5763  */
5764 typedef struct AVBSFContext {
5765  /**
5766  * A class for logging and AVOptions
5767  */
5769 
5770  /**
5771  * The bitstream filter this context is an instance of.
5772  */
5773  const struct AVBitStreamFilter *filter;
5774 
5775  /**
5776  * Opaque libavcodec internal data. Must not be touched by the caller in any
5777  * way.
5778  */
5779  AVBSFInternal *internal;
5780 
5781  /**
5782  * Opaque filter-specific private data. If filter->priv_class is non-NULL,
5783  * this is an AVOptions-enabled struct.
5784  */
5785  void *priv_data;
5786 
5787  /**
5788  * Parameters of the input stream. This field is allocated in
5789  * av_bsf_alloc(), it needs to be filled by the caller before
5790  * av_bsf_init().
5791  */
5793 
5794  /**
5795  * Parameters of the output stream. This field is allocated in
5796  * av_bsf_alloc(), it is set by the filter in av_bsf_init().
5797  */
5799 
5800  /**
5801  * The timebase used for the timestamps of the input packets. Set by the
5802  * caller before av_bsf_init().
5803  */
5805 
5806  /**
5807  * The timebase used for the timestamps of the output packets. Set by the
5808  * filter in av_bsf_init().
5809  */
5811 } AVBSFContext;
5812 
5813 typedef struct AVBitStreamFilter {
5814  const char *name;
5815 
5816  /**
5817  * A list of codec ids supported by the filter, terminated by
5818  * AV_CODEC_ID_NONE.
5819  * May be NULL, in that case the bitstream filter works with any codec id.
5820  */
5821  const enum AVCodecID *codec_ids;
5822 
5823  /**
5824  * A class for the private data, used to declare bitstream filter private
5825  * AVOptions. This field is NULL for bitstream filters that do not declare
5826  * any options.
5827  *
5828  * If this field is non-NULL, the first member of the filter private data
5829  * must be a pointer to AVClass, which will be set by libavcodec generic
5830  * code to this class.
5831  */
5833 
5834  /*****************************************************************
5835  * No fields below this line are part of the public API. They
5836  * may not be used outside of libavcodec and can be changed and
5837  * removed at will.
5838  * New public fields should be added right above.
5839  *****************************************************************
5840  */
5841 
5843  int (*init)(AVBSFContext *ctx);
5845  void (*close)(AVBSFContext *ctx);
5846  void (*flush)(AVBSFContext *ctx);
5848 
5849 #if FF_API_OLD_BSF
5850 /**
5851  * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5852  * is deprecated. Use the new bitstream filtering API (using AVBSFContext).
5853  */
5856 /**
5857  * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5858  * is deprecated. Use av_bsf_get_by_name(), av_bsf_alloc(), and av_bsf_init()
5859  * from the new bitstream filtering API (using AVBSFContext).
5860  */
5863 /**
5864  * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5865  * is deprecated. Use av_bsf_send_packet() and av_bsf_receive_packet() from the
5866  * new bitstream filtering API (using AVBSFContext).
5867  */
5870  AVCodecContext *avctx, const char *args,
5871  uint8_t **poutbuf, int *poutbuf_size,
5872  const uint8_t *buf, int buf_size, int keyframe);
5873 /**
5874  * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5875  * is deprecated. Use av_bsf_free() from the new bitstream filtering API (using
5876  * AVBSFContext).
5877  */
5880 /**
5881  * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5882  * is deprecated. Use av_bsf_iterate() from the new bitstream filtering API (using
5883  * AVBSFContext).
5884  */
5887 #endif
5888 
5889 /**
5890  * @return a bitstream filter with the specified name or NULL if no such
5891  * bitstream filter exists.
5892  */
5893 const AVBitStreamFilter *av_bsf_get_by_name(const char *name);
5894 
5895 /**
5896  * Iterate over all registered bitstream filters.
5897  *
5898  * @param opaque a pointer where libavcodec will store the iteration state. Must
5899  * point to NULL to start the iteration.
5900  *
5901  * @return the next registered bitstream filter or NULL when the iteration is
5902  * finished
5903  */
5904 const AVBitStreamFilter *av_bsf_iterate(void **opaque);
5905 #if FF_API_NEXT
5907 const AVBitStreamFilter *av_bsf_next(void **opaque);
5908 #endif
5909 
5910 /**
5911  * Allocate a context for a given bitstream filter. The caller must fill in the
5912  * context parameters as described in the documentation and then call
5913  * av_bsf_init() before sending any data to the filter.
5914  *
5915  * @param filter the filter for which to allocate an instance.
5916  * @param ctx a pointer into which the pointer to the newly-allocated context
5917  * will be written. It must be freed with av_bsf_free() after the
5918  * filtering is done.
5919  *
5920  * @return 0 on success, a negative AVERROR code on failure
5921  */
5922 int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx);
5923 
5924 /**
5925  * Prepare the filter for use, after all the parameters and options have been
5926  * set.
5927  */
5928 int av_bsf_init(AVBSFContext *ctx);
5929 
5930 /**
5931  * Submit a packet for filtering.
5932  *
5933  * After sending each packet, the filter must be completely drained by calling
5934  * av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or
5935  * AVERROR_EOF.
5936  *
5937  * @param pkt the packet to filter. The bitstream filter will take ownership of
5938  * the packet and reset the contents of pkt. pkt is not touched if an error occurs.
5939  * This parameter may be NULL, which signals the end of the stream (i.e. no more
5940  * packets will be sent). That will cause the filter to output any packets it
5941  * may have buffered internally.
5942  *
5943  * @return 0 on success, a negative AVERROR on error.
5944  */
5946 
5947 /**
5948  * Retrieve a filtered packet.
5949  *
5950  * @param[out] pkt this struct will be filled with the contents of the filtered
5951  * packet. It is owned by the caller and must be freed using
5952  * av_packet_unref() when it is no longer needed.
5953  * This parameter should be "clean" (i.e. freshly allocated
5954  * with av_packet_alloc() or unreffed with av_packet_unref())
5955  * when this function is called. If this function returns
5956  * successfully, the contents of pkt will be completely
5957  * overwritten by the returned data. On failure, pkt is not
5958  * touched.
5959  *
5960  * @return 0 on success. AVERROR(EAGAIN) if more packets need to be sent to the
5961  * filter (using av_bsf_send_packet()) to get more output. AVERROR_EOF if there
5962  * will be no further output from the filter. Another negative AVERROR value if
5963  * an error occurs.
5964  *
5965  * @note one input packet may result in several output packets, so after sending
5966  * a packet with av_bsf_send_packet(), this function needs to be called
5967  * repeatedly until it stops returning 0. It is also possible for a filter to
5968  * output fewer packets than were sent to it, so this function may return
5969  * AVERROR(EAGAIN) immediately after a successful av_bsf_send_packet() call.
5970  */
5972 
5973 /**
5974  * Reset the internal bitstream filter state / flush internal buffers.
5975  */
5976 void av_bsf_flush(AVBSFContext *ctx);
5977 
5978 /**
5979  * Free a bitstream filter context and everything associated with it; write NULL
5980  * into the supplied pointer.
5981  */
5982 void av_bsf_free(AVBSFContext **ctx);
5983 
5984 /**
5985  * Get the AVClass for AVBSFContext. It can be used in combination with
5986  * AV_OPT_SEARCH_FAKE_OBJ for examining options.
5987  *
5988  * @see av_opt_find().
5989  */
5990 const AVClass *av_bsf_get_class(void);
5991 
5992 /**
5993  * Structure for chain/list of bitstream filters.
5994  * Empty list can be allocated by av_bsf_list_alloc().
5995  */
5996 typedef struct AVBSFList AVBSFList;
5997 
5998 /**
5999  * Allocate empty list of bitstream filters.
6000  * The list must be later freed by av_bsf_list_free()
6001  * or finalized by av_bsf_list_finalize().
6002  *
6003  * @return Pointer to @ref AVBSFList on success, NULL in case of failure
6004  */
6006 
6007 /**
6008  * Free list of bitstream filters.
6009  *
6010  * @param lst Pointer to pointer returned by av_bsf_list_alloc()
6011  */
6012 void av_bsf_list_free(AVBSFList **lst);
6013 
6014 /**
6015  * Append bitstream filter to the list of bitstream filters.
6016  *
6017  * @param lst List to append to
6018  * @param bsf Filter context to be appended
6019  *
6020  * @return >=0 on success, negative AVERROR in case of failure
6021  */
6022 int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf);
6023 
6024 /**
6025  * Construct new bitstream filter context given it's name and options
6026  * and append it to the list of bitstream filters.
6027  *
6028  * @param lst List to append to
6029  * @param bsf_name Name of the bitstream filter
6030  * @param options Options for the bitstream filter, can be set to NULL
6031  *
6032  * @return >=0 on success, negative AVERROR in case of failure
6033  */
6034 int av_bsf_list_append2(AVBSFList *lst, const char * bsf_name, AVDictionary **options);
6035 /**
6036  * Finalize list of bitstream filters.
6037  *
6038  * This function will transform @ref AVBSFList to single @ref AVBSFContext,
6039  * so the whole chain of bitstream filters can be treated as single filter
6040  * freshly allocated by av_bsf_alloc().
6041  * If the call is successful, @ref AVBSFList structure is freed and lst
6042  * will be set to NULL. In case of failure, caller is responsible for
6043  * freeing the structure by av_bsf_list_free()
6044  *
6045  * @param lst Filter list structure to be transformed
6046  * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
6047  * representing the chain of bitstream filters
6048  *
6049  * @return >=0 on success, negative AVERROR in case of failure
6050  */
6051 int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf);
6052 
6053 /**
6054  * Parse string describing list of bitstream filters and create single
6055  * @ref AVBSFContext describing the whole chain of bitstream filters.
6056  * Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext freshly
6057  * allocated by av_bsf_alloc().
6058  *
6059  * @param str String describing chain of bitstream filters in format
6060  * `bsf1[=opt1=val1:opt2=val2][,bsf2]`
6061  * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
6062  * representing the chain of bitstream filters
6063  *
6064  * @return >=0 on success, negative AVERROR in case of failure
6065  */
6066 int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf);
6067 
6068 /**
6069  * Get null/pass-through bitstream filter.
6070  *
6071  * @param[out] bsf Pointer to be set to new instance of pass-through bitstream filter
6072  *
6073  * @return
6074  */
6076 
6077 /* memory */
6078 
6079 /**
6080  * Same behaviour av_fast_malloc but the buffer has additional
6081  * AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0.
6082  *
6083  * In addition the whole buffer will initially and after resizes
6084  * be 0-initialized so that no uninitialized data will ever appear.
6085  */
6086 void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
6087 
6088 /**
6089  * Same behaviour av_fast_padded_malloc except that buffer will always
6090  * be 0-initialized after call.
6091  */
6092 void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
6093 
6094 /**
6095  * Encode extradata length to a buffer. Used by xiph codecs.
6096  *
6097  * @param s buffer to write to; must be at least (v/255+1) bytes long
6098  * @param v size of extradata in bytes
6099  * @return number of bytes written to the buffer.
6100  */
6101 unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
6102 
6103 #if FF_API_USER_VISIBLE_AVHWACCEL
6104 /**
6105  * Register the hardware accelerator hwaccel.
6106  *
6107  * @deprecated This function doesn't do anything.
6108  */
6110 void av_register_hwaccel(AVHWAccel *hwaccel);
6111 
6112 /**
6113  * If hwaccel is NULL, returns the first registered hardware accelerator,
6114  * if hwaccel is non-NULL, returns the next registered hardware accelerator
6115  * after hwaccel, or NULL if hwaccel is the last one.
6116  *
6117  * @deprecated AVHWaccel structures contain no user-serviceable parts, so
6118  * this function should not be used.
6119  */
6121 AVHWAccel *av_hwaccel_next(const AVHWAccel *hwaccel);
6122 #endif
6123 
6124 #if FF_API_LOCKMGR
6125 /**
6126  * Lock operation used by lockmgr
6127  *
6128  * @deprecated Deprecated together with av_lockmgr_register().
6129  */
6130 enum AVLockOp {
6131  AV_LOCK_CREATE, ///< Create a mutex
6132  AV_LOCK_OBTAIN, ///< Lock the mutex
6133  AV_LOCK_RELEASE, ///< Unlock the mutex
6134  AV_LOCK_DESTROY, ///< Free mutex resources
6135 };
6136 
6137 /**
6138  * Register a user provided lock manager supporting the operations
6139  * specified by AVLockOp. The "mutex" argument to the function points
6140  * to a (void *) where the lockmgr should store/get a pointer to a user
6141  * allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the
6142  * value left by the last call for all other ops. If the lock manager is
6143  * unable to perform the op then it should leave the mutex in the same
6144  * state as when it was called and return a non-zero value. However,
6145  * when called with AV_LOCK_DESTROY the mutex will always be assumed to
6146  * have been successfully destroyed. If av_lockmgr_register succeeds
6147  * it will return a non-negative value, if it fails it will return a
6148  * negative value and destroy all mutex and unregister all callbacks.
6149  * av_lockmgr_register is not thread-safe, it must be called from a
6150  * single thread before any calls which make use of locking are used.
6151  *
6152  * @param cb User defined callback. av_lockmgr_register invokes calls
6153  * to this callback and the previously registered callback.
6154  * The callback will be used to create more than one mutex
6155  * each of which must be backed by its own underlying locking
6156  * mechanism (i.e. do not use a single static object to
6157  * implement your lock manager). If cb is set to NULL the
6158  * lockmgr will be unregistered.
6159  *
6160  * @deprecated This function does nothing, and always returns 0. Be sure to
6161  * build with thread support to get basic thread safety.
6162  */
6164 int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
6165 #endif
6166 
6167 /**
6168  * Get the type of the given codec.
6169  */
6170 enum AVMediaType avcodec_get_type(enum AVCodecID codec_id);
6171 
6172 /**
6173  * Get the name of a codec.
6174  * @return a static string identifying the codec; never NULL
6175  */
6176 const char *avcodec_get_name(enum AVCodecID id);
6177 
6178 /**
6179  * @return a positive value if s is open (i.e. avcodec_open2() was called on it
6180  * with no corresponding avcodec_close()), 0 otherwise.
6181  */
6183 
6184 /**
6185  * @return a non-zero number if codec is an encoder, zero otherwise
6186  */
6187 int av_codec_is_encoder(const AVCodec *codec);
6188 
6189 /**
6190  * @return a non-zero number if codec is a decoder, zero otherwise
6191  */
6192 int av_codec_is_decoder(const AVCodec *codec);
6193 
6194 /**
6195  * @return descriptor for given codec ID or NULL if no descriptor exists.
6196  */
6198 
6199 /**
6200  * Iterate over all codec descriptors known to libavcodec.
6201  *
6202  * @param prev previous descriptor. NULL to get the first descriptor.
6203  *
6204  * @return next descriptor or NULL after the last descriptor
6205  */
6207 
6208 /**
6209  * @return codec descriptor with the given name or NULL if no such descriptor
6210  * exists.
6211  */
6212 const AVCodecDescriptor *avcodec_descriptor_get_by_name(const char *name);
6213 
6214 
6215 /**
6216  * @return
6217  * 0 - not have JJM Graphic Card
6218  * 1 - have JJM Graphic Card
6219  */
6220 int is_have_jjm(void);
6221 /**
6222  * Allocate a CPB properties structure and initialize its fields to default
6223  * values.
6224  *
6225  * @param size if non-NULL, the size of the allocated struct will be written
6226  * here. This is useful for embedding it in side data.
6227  *
6228  * @return the newly allocated struct or NULL on failure
6229  */
6231 
6232 /**
6233  * @}
6234  */
6235 
6236 #endif /* AVCODEC_AVCODEC_H */
avcodec_get_type
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:464
AV_CODEC_ID_TRUEMOTION2
@ AV_CODEC_ID_TRUEMOTION2
Definition: avcodec.h:295
AVSubtitle
Definition: avcodec.h:3934
AV_CODEC_ID_ANSI
@ AV_CODEC_ID_ANSI
Definition: avcodec.h:360
avcodec_close
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
AV_CODEC_ID_TRUEMOTION2RT
@ AV_CODEC_ID_TRUEMOTION2RT
Definition: avcodec.h:432
avcodec_encode_subtitle
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVSubtitle *sub)
AVPanScan::id
int id
id
Definition: avcodec.h:1106
AVCodecContext::frame_size
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2246
AV_CODEC_ID_EIA_608
@ AV_CODEC_ID_EIA_608
Definition: avcodec.h:670
AVBSFInternal
struct AVBSFInternal AVBSFInternal
Definition: avcodec.h:5752
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
AV_CODEC_ID_MACE6
@ AV_CODEC_ID_MACE6
Definition: avcodec.h:575
AVCodecContext::hwaccel
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2730
AVCodec
AVCodec.
Definition: avcodec.h:3482
AVCodecContext::hwaccel_context
void * hwaccel_context
Hardware accelerator context.
Definition: avcodec.h:2742
av_codec_get_codec_properties
attribute_deprecated unsigned av_codec_get_codec_properties(const AVCodecContext *avctx)
AV_CODEC_ID_VP6F
@ AV_CODEC_ID_VP6F
Definition: avcodec.h:310
AVBSFContext::par_in
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5792
AV_CODEC_ID_MSCC
@ AV_CODEC_ID_MSCC
Definition: avcodec.h:446
AV_CODEC_ID_IDCIN
@ AV_CODEC_ID_IDCIN
Definition: avcodec.h:265
hw_pix_fmt
static enum AVPixelFormat hw_pix_fmt
Definition: hw_decode.c:46
AV_CODEC_ID_SANM
@ AV_CODEC_ID_SANM
Definition: avcodec.h:400
AV_CODEC_ID_PCM_F32BE
@ AV_CODEC_ID_PCM_F32BE
Definition: avcodec.h:484
AV_CODEC_ID_DSD_LSBF
@ AV_CODEC_ID_DSD_LSBF
Definition: avcodec.h:639
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3972
AV_CODEC_ID_ADPCM_MS
@ AV_CODEC_ID_ADPCM_MS
Definition: avcodec.h:509
AV_CODEC_ID_LAGARITH
@ AV_CODEC_ID_LAGARITH
Definition: avcodec.h:365
AVCodecParserContext::convergence_duration
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:5165
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AV_CODEC_ID_DPX
@ AV_CODEC_ID_DPX
Definition: avcodec.h:346
AV_CODEC_ID_ADPCM_IMA_QT
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: avcodec.h:503
AV_FIELD_PROGRESSIVE
@ AV_FIELD_PROGRESSIVE
Definition: avcodec.h:1546
AVCodecParserContext::pts
int64_t pts
Definition: avcodec.h:5128
av_codec_set_pkt_timebase
attribute_deprecated void av_codec_set_pkt_timebase(AVCodecContext *avctx, AVRational val)
AV_CODEC_ID_INDEO5
@ AV_CODEC_ID_INDEO5
Definition: avcodec.h:330
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: avcodec.h:568
AVPanScan::position
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1121
AVCodecContext::log_level_offset
int log_level_offset
Definition: avcodec.h:1572
AV_AUDIO_SERVICE_TYPE_VOICE_OVER
@ AV_AUDIO_SERVICE_TYPE_VOICE_OVER
Definition: avcodec.h:823
AVCodecContext::keyint_min
int keyint_min
minimum GOP size
Definition: avcodec.h:2147
av_bsf_iterate
const AVBitStreamFilter * av_bsf_iterate(void **opaque)
Iterate over all registered bitstream filters.
AV_AUDIO_SERVICE_TYPE_EMERGENCY
@ AV_AUDIO_SERVICE_TYPE_EMERGENCY
Definition: avcodec.h:822
avcodec_receive_packet
int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
Read encoded data from the encoder.
AVCodecContext::workaround_bugs
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:2600
AVSubtitle::rects
AVSubtitleRect ** rects
Definition: avcodec.h:3939
AV_PKT_DATA_NB
@ AV_PKT_DATA_NB
The number of side data types.
Definition: avcodec.h:1416
av_xiphlacing
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
Encode extradata length to a buffer.
av_codec_is_decoder
int av_codec_is_decoder(const AVCodec *codec)
AVCodecContext::get_format
enum AVPixelFormat(* get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
callback to negotiate the pixelFormat
Definition: avcodec.h:1818
AVCodecParserContext::dts_sync_point
int dts_sync_point
Synchronization point for start of timestamp generation.
Definition: avcodec.h:5178
AV_CODEC_ID_PCM_BLURAY
@ AV_CODEC_ID_PCM_BLURAY
Definition: avcodec.h:488
AV_CODEC_ID_PBM
@ AV_CODEC_ID_PBM
Definition: avcodec.h:281
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: avcodec.h:597
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3954
AVCodecContext::audio_service_type
enum AVAudioServiceType audio_service_type
Type of service that the audio stream conveys.
Definition: avcodec.h:2291
AVCodecContext::channel_layout
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2277
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2194
AV_CODEC_ID_HUFFYUV
@ AV_CODEC_ID_HUFFYUV
Definition: avcodec.h:243
AVCodecContext::mpeg_quant
attribute_deprecated int mpeg_quant
Definition: avcodec.h:1861
AVCodec::long_name
const char * long_name
Descriptive name for the codec, meant to be more human readable than name.
Definition: avcodec.h:3494
AV_CODEC_ID_TQI
@ AV_CODEC_ID_TQI
Definition: avcodec.h:340
AV_CODEC_ID_ESCAPE130
@ AV_CODEC_ID_ESCAPE130
Definition: avcodec.h:388
AVColorTransferCharacteristic
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:467
AV_CODEC_ID_V308
@ AV_CODEC_ID_V308
Definition: avcodec.h:421
AVCodecContext::av_class
const AVClass * av_class
information on struct for av_log
Definition: avcodec.h:1571
AVCodecHWConfig::methods
int methods
Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible setup methods which can be used...
Definition: avcodec.h:3465
AV_PKT_DATA_MPEGTS_STREAM_ID
@ AV_PKT_DATA_MPEGTS_STREAM_ID
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: avcodec.h:1360
av_parser_next
attribute_deprecated AVCodecParser * av_parser_next(const AVCodecParser *c)
AV_CODEC_ID_ADPCM_DTK
@ AV_CODEC_ID_ADPCM_DTK
Definition: avcodec.h:537
AVCodecParserContext::pict_type
int pict_type
Definition: avcodec.h:5117
avcodec_encode_audio2
attribute_deprecated int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of audio.
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:2226
AV_CODEC_ID_HCOM
@ AV_CODEC_ID_HCOM
Definition: avcodec.h:655
AV_CODEC_ID_ZMBV
@ AV_CODEC_ID_ZMBV
Definition: avcodec.h:299
AVCodecContext::rc_min_rate
int64_t rc_min_rate
minimum bitrate
Definition: avcodec.h:2451
AV_CODEC_ID_HYMT
@ AV_CODEC_ID_HYMT
Definition: avcodec.h:456
AVCodecParserContext::output_picture_number
int output_picture_number
Picture number incremented in presentation or output order.
Definition: avcodec.h:5251
AV_CODEC_ID_INTERPLAY_ACM
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: avcodec.h:644
AVCodecContext::thread_safe_callbacks
int thread_safe_callbacks
Set by the client if its custom get_buffer() callback can be called synchronously from another thread...
Definition: avcodec.h:2854
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3950
AV_PKT_DATA_PARAM_CHANGE
@ AV_PKT_DATA_PARAM_CHANGE
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: avcodec.h:1217
AVCodec::priv_class
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3508
AVCodecParameters::color_space
enum AVColorSpace color_space
Definition: avcodec.h:4047
avcodec_decode_audio4
attribute_deprecated int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt->size from avpkt->data into frame.
av_bsf_list_append
int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
Append bitstream filter to the list of bitstream filters.
AVProfile::name
const char * name
short name for the profile
Definition: avcodec.h:3417
AV_CODEC_ID_SRGC
@ AV_CODEC_ID_SRGC
Definition: avcodec.h:447
AVHWAccel::type
enum AVMediaType type
Type of codec implemented by the hardware accelerator.
Definition: avcodec.h:3663
AV_CODEC_ID_8SVX_EXP
@ AV_CODEC_ID_8SVX_EXP
Definition: avcodec.h:619
AV_CODEC_ID_LOCO
@ AV_CODEC_ID_LOCO
Definition: avcodec.h:290
AV_PICTURE_STRUCTURE_UNKNOWN
@ AV_PICTURE_STRUCTURE_UNKNOWN
Definition: avcodec.h:5103
AVHWAccel::caps_internal
int caps_internal
Internal hwaccel capabilities.
Definition: avcodec.h:3799
AVCodecDescriptor::long_name
const char * long_name
A more descriptive name for this codec.
Definition: avcodec.h:729
avcodec_parameters_from_context
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
av_bitstream_filter_filter
attribute_deprecated int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
AVPanScan
Pan Scan area.
Definition: avcodec.h:1100
AVCodecParserContext::duration
int duration
Duration of the current frame.
Definition: avcodec.h:5231
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2695
avcodec_string
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
rational.h
AV_CODEC_ID_DIRAC
@ AV_CODEC_ID_DIRAC
Definition: avcodec.h:334
AVCodecDescriptor::name
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:725
AVBitStreamFilter::name
const char * name
Definition: avcodec.h:5814
AVCodecContext::coded_side_data
AVPacketSideData * coded_side_data
Additional data associated with the entire coded stream.
Definition: avcodec.h:3238
AV_CODEC_ID_MP3ON4
@ AV_CODEC_ID_MP3ON4
Definition: avcodec.h:579
av_grow_packet
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
AVSubtitleRect
Definition: avcodec.h:3899
AVSubtitle::num_rects
unsigned num_rects
Definition: avcodec.h:3938
av_free_packet
attribute_deprecated void av_free_packet(AVPacket *pkt)
Free a packet.
av_parser_iterate
const AVCodecParser * av_parser_iterate(void **opaque)
Iterate over all registered codec parsers.
AV_CODEC_ID_RAWVIDEO
@ AV_CODEC_ID_RAWVIDEO
Definition: avcodec.h:231
AVCodecContext::intra_matrix
uint16_t * intra_matrix
custom intra quantization matrix Must be allocated with the av_malloc() family of functions,...
Definition: avcodec.h:2066
AVCodecContext::mv0_threshold
int mv0_threshold
Note: Value depends upon the compare function used for fullpel ME.
Definition: avcodec.h:2167
AV_CODEC_ID_MVC2
@ AV_CODEC_ID_MVC2
Definition: avcodec.h:403
av_bsf_send_packet
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
AVCodecContext::lumi_masking
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1885
AVCodec::pix_fmts
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3503
avcodec_find_encoder
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
AVCodec::wrapper_name
const char * wrapper_name
Group name of the codec implementation.
Definition: avcodec.h:3521
AV_CODEC_ID_MPEG4
@ AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
AV_CODEC_ID_PCM_S32LE_PLANAR
@ AV_CODEC_ID_PCM_S32LE_PLANAR
Definition: avcodec.h:493
AV_PKT_DATA_ENCRYPTION_INFO
@ AV_PKT_DATA_ENCRYPTION_INFO
This side data contains encryption info for how to decrypt the packet.
Definition: avcodec.h:1400
AV_CODEC_ID_RA_144
@ AV_CODEC_ID_RA_144
Definition: avcodec.h:552
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AV_CODEC_ID_TXD
@ AV_CODEC_ID_TXD
Definition: avcodec.h:323
AVCodecContext::color_trc
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2187
AVPacketSideData
Definition: avcodec.h:1421
AVCodecParserContext::pts_dts_delta
int pts_dts_delta
Presentation delay of current frame in units of AVCodecContext.time_base.
Definition: avcodec.h:5207
AVCodecContext::slice_offset
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:1936
AVCodec::capabilities
int capabilities
Codec capabilities.
Definition: avcodec.h:3501
AV_CODEC_ID_WNV1
@ AV_CODEC_ID_WNV1
Definition: avcodec.h:291
AV_CODEC_ID_MWSC
@ AV_CODEC_ID_MWSC
Definition: avcodec.h:453
av_codec_get_codec_descriptor
const attribute_deprecated AVCodecDescriptor * av_codec_get_codec_descriptor(const AVCodecContext *avctx)
AV_CODEC_ID_INDEO3
@ AV_CODEC_ID_INDEO3
Definition: avcodec.h:246
avcodec_decode_subtitle2
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
AVPacket::data
uint8_t * data
Definition: avcodec.h:1478
AV_CODEC_ID_DVB_TELETEXT
@ AV_CODEC_ID_DVB_TELETEXT
Definition: avcodec.h:666
AV_CODEC_ID_PCM_S16BE_PLANAR
@ AV_CODEC_ID_PCM_S16BE_PLANAR
Definition: avcodec.h:494
AV_CODEC_ID_PPM
@ AV_CODEC_ID_PPM
Definition: avcodec.h:280
av_codec_get_max_lowres
attribute_deprecated int av_codec_get_max_lowres(const AVCodec *codec)
av_lockmgr_register
attribute_deprecated int av_lockmgr_register(int(*cb)(void **mutex, enum AVLockOp op))
Register a user provided lock manager supporting the operations specified by AVLockOp.
av_codec_set_chroma_intra_matrix
attribute_deprecated void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val)
AV_CODEC_ID_VP6
@ AV_CODEC_ID_VP6
Definition: avcodec.h:309
AVBitStreamFilter::priv_data_size
int priv_data_size
Definition: avcodec.h:5842
AVCodecContext::field_order
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2223
AV_CODEC_ID_A64_MULTI
@ AV_CODEC_ID_A64_MULTI
Definition: avcodec.h:361
AVCodecParameters::seek_preroll
int seek_preroll
Audio only.
Definition: avcodec.h:4098
AVHWAccel::capabilities
int capabilities
Hardware accelerated codec capabilities.
Definition: avcodec.h:3683
AV_CODEC_ID_FFMETADATA
@ AV_CODEC_ID_FFMETADATA
Dummy codec for streams containing only metadata information.
Definition: avcodec.h:708
AV_CODEC_ID_PGM
@ AV_CODEC_ID_PGM
Definition: avcodec.h:282
AV_PKT_DATA_PALETTE
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: avcodec.h:1191
AV_CODEC_ID_FLIC
@ AV_CODEC_ID_FLIC
Definition: avcodec.h:268
AV_CODEC_ID_ADPCM_EA_R3
@ AV_CODEC_ID_ADPCM_EA_R3
Definition: avcodec.h:524
AV_LOCK_RELEASE
@ AV_LOCK_RELEASE
Unlock the mutex.
Definition: avcodec.h:6133
AV_CODEC_ID_AVS2
@ AV_CODEC_ID_AVS2
Definition: avcodec.h:412
AV_CODEC_ID_PCM_U24LE
@ AV_CODEC_ID_PCM_U24LE
Definition: avcodec.h:478
AV_CODEC_ID_ALAC
@ AV_CODEC_ID_ALAC
Definition: avcodec.h:581
AVCodecContext::p_tex_bits
attribute_deprecated int p_tex_bits
Definition: avcodec.h:2565
AV_PKT_DATA_ENCRYPTION_INIT_INFO
@ AV_PKT_DATA_ENCRYPTION_INIT_INFO
This side data is encryption initialization data.
Definition: avcodec.h:1394
AVCodecContext::b_quant_offset
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1848
AVCodecParserContext::height
int height
Definition: avcodec.h:5257
avcodec_align_dimensions
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
RcOverride::qscale
int qscale
Definition: avcodec.h:834
AV_CODEC_ID_AMR_NB
@ AV_CODEC_ID_AMR_NB
Definition: avcodec.h:548
AVHWAccel::init
int(* init)(AVCodecContext *avctx)
Initialize the hwaccel private data.
Definition: avcodec.h:3780
AVLockOp
AVLockOp
Lock operation used by lockmgr.
Definition: avcodec.h:6130
AV_CODEC_ID_ADPCM_AICA
@ AV_CODEC_ID_ADPCM_AICA
Definition: avcodec.h:542
AVCodecContext::debug_mv
int debug_mv
debug motion vectors
Definition: avcodec.h:3194
AV_CODEC_ID_ADPCM_IMA_OKI
@ AV_CODEC_ID_ADPCM_IMA_OKI
Definition: avcodec.h:536
avcodec_register_all
attribute_deprecated void avcodec_register_all(void)
Register all the codecs, parsers and bitstream filters which were enabled at configuration time.
AVCodecContext::subtitle_header
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:3051
AVBitStreamFilterContext::filter
const struct AVBitStreamFilter * filter
Definition: avcodec.h:5741
version.h
AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE
@ AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE
Definition: avcodec.h:1535
AVSubtitleRect::linesize
int linesize[4]
Definition: avcodec.h:3918
AV_CODEC_ID_SOL_DPCM
@ AV_CODEC_ID_SOL_DPCM
Definition: avcodec.h:559
AVCodecContext::skip_count
attribute_deprecated int skip_count
Definition: avcodec.h:2571
AVBSFContext::av_class
const AVClass * av_class
A class for logging and AVOptions.
Definition: avcodec.h:5768
AV_CODEC_ID_TRUEMOTION1
@ AV_CODEC_ID_TRUEMOTION1
Definition: avcodec.h:269
AV_CODEC_ID_PCM_ZORK
@ AV_CODEC_ID_PCM_ZORK
Definition: avcodec.h:481
AV_PKT_DATA_AFD
@ AV_PKT_DATA_AFD
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: avcodec.h:1406
AV_CODEC_ID_ON2AVC
@ AV_CODEC_ID_ON2AVC
Definition: avcodec.h:630
AV_CODEC_ID_GDV
@ AV_CODEC_ID_GDV
Definition: avcodec.h:449
AVCodecParserContext::cur_frame_start_index
int cur_frame_start_index
Definition: avcodec.h:5137
av_codec_set_seek_preroll
attribute_deprecated void av_codec_set_seek_preroll(AVCodecContext *avctx, int val)
AV_CODEC_ID_WMAV2
@ AV_CODEC_ID_WMAV2
Definition: avcodec.h:573
AV_CODEC_ID_ADPCM_G722
@ AV_CODEC_ID_ADPCM_G722
Definition: avcodec.h:531
avcodec_profile_name
const char * avcodec_profile_name(enum AVCodecID codec_id, int profile)
Return a name for the specified profile, if available.
AV_CODEC_ID_ATRAC3PAL
@ AV_CODEC_ID_ATRAC3PAL
Definition: avcodec.h:649
AV_CODEC_ID_ARBC
@ AV_CODEC_ID_ARBC
Definition: avcodec.h:457
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1496
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3962
AV_CODEC_ID_SCREENPRESSO
@ AV_CODEC_ID_SCREENPRESSO
Definition: avcodec.h:410
AVCodecContext::me_pre_cmp
int me_pre_cmp
motion estimation prepass comparison function
Definition: avcodec.h:2014
AV_CODEC_ID_VB
@ AV_CODEC_ID_VB
Definition: avcodec.h:326
AV_CODEC_ID_FLAC
@ AV_CODEC_ID_FLAC
Definition: avcodec.h:577
AV_CODEC_ID_IMC
@ AV_CODEC_ID_IMC
Definition: avcodec.h:592
AVColorPrimaries
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:443
avcodec_default_get_format
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
avcodec_find_best_pix_fmt_of_list
enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Find the best pixel format to convert to given a certain source pixel format.
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT
@ AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT
Definition: avcodec.h:1534
AVCodecContext::mb_decision
int mb_decision
macroblock decision mode
Definition: avcodec.h:2054
avcodec_is_open
int avcodec_is_open(AVCodecContext *s)
AV_CODEC_ID_APNG
@ AV_CODEC_ID_APNG
Definition: avcodec.h:429
AV_CODEC_ID_THP
@ AV_CODEC_ID_THP
Definition: avcodec.h:318
AV_PKT_DATA_SPHERICAL
@ AV_PKT_DATA_SPHERICAL
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1373
AV_CODEC_ID_YOP
@ AV_CODEC_ID_YOP
Definition: avcodec.h:357
AV_CODEC_ID_MXPEG
@ AV_CODEC_ID_MXPEG
Definition: avcodec.h:364
AVCodecContext::qmax
int qmax
maximum quantizer
Definition: avcodec.h:2415
AVCodecContext::frame_skip_threshold
attribute_deprecated int frame_skip_threshold
Definition: avcodec.h:2495
AV_CODEC_ID_HDMV_PGS_SUBTITLE
@ AV_CODEC_ID_HDMV_PGS_SUBTITLE
Definition: avcodec.h:665
AV_CODEC_ID_R10K
@ AV_CODEC_ID_R10K
Definition: avcodec.h:363
av_packet_free_side_data
void av_packet_free_side_data(AVPacket *pkt)
Convenience function to free all the side data stored.
AVCodecContext::request_channel_layout
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:2284
AV_CODEC_ID_TRUEHD
@ AV_CODEC_ID_TRUEHD
Definition: avcodec.h:609
AVCodecParserContext::coded_width
int coded_width
Dimensions of the coded video.
Definition: avcodec.h:5262
AVCodecContext::delay
int delay
Codec delay.
Definition: avcodec.h:1722
AVCodecContext::me_subpel_quality
int me_subpel_quality
subpel ME quality
Definition: avcodec.h:2028
AVCodecContext::mb_cmp
int mb_cmp
macroblock comparison function (not supported yet)
Definition: avcodec.h:1964
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
AVBSFContext
The bitstream filter state.
Definition: avcodec.h:5764
AVPicture::data
attribute_deprecated uint8_t * data[AV_NUM_DATA_POINTERS]
pointers to the image data planes
Definition: avcodec.h:3869
AV_CODEC_ID_PCM_S16LE_PLANAR
@ AV_CODEC_ID_PCM_S16LE_PLANAR
Definition: avcodec.h:482
AV_CODEC_ID_ADPCM_THP_LE
@ AV_CODEC_ID_ADPCM_THP_LE
Definition: avcodec.h:540
AV_CODEC_ID_DSICINVIDEO
@ AV_CODEC_ID_DSICINVIDEO
Definition: avcodec.h:312
AV_CODEC_ID_TGQ
@ AV_CODEC_ID_TGQ
Definition: avcodec.h:339
AV_CODEC_ID_RSCC
@ AV_CODEC_ID_RSCC
Definition: avcodec.h:411
AVCodecContext::slice_count
int slice_count
slice count
Definition: avcodec.h:1920
AV_CODEC_ID_AMR_WB
@ AV_CODEC_ID_AMR_WB
Definition: avcodec.h:549
av_bsf_get_null_filter
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
AV_CODEC_ID_BIN_DATA
@ AV_CODEC_ID_BIN_DATA
Definition: avcodec.h:699
AV_CODEC_ID_H261
@ AV_CODEC_ID_H261
Definition: avcodec.h:221
AVPictureStructure
AVPictureStructure
Definition: avcodec.h:5102
AV_CODEC_ID_MP3ADU
@ AV_CODEC_ID_MP3ADU
Definition: avcodec.h:578
avcodec_pix_fmt_to_codec_tag
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt)
Return a value representing the fourCC code associated to the pixel format pix_fmt,...
AVCodecParser::next
struct AVCodecParser * next
Definition: avcodec.h:5288
SUBTITLE_ASS
@ SUBTITLE_ASS
Formatted text, the ass field must be set by the decoder and is authoritative.
Definition: avcodec.h:3894
AV_CODEC_ID_SRT
@ AV_CODEC_ID_SRT
Definition: avcodec.h:667
AV_CODEC_ID_PCM_S64LE
@ AV_CODEC_ID_PCM_S64LE
Definition: avcodec.h:496
AV_AUDIO_SERVICE_TYPE_NB
@ AV_AUDIO_SERVICE_TYPE_NB
Not part of ABI.
Definition: avcodec.h:825
AVProfile
AVProfile.
Definition: avcodec.h:3415
AV_CODEC_ID_DSD_MSBF_PLANAR
@ AV_CODEC_ID_DSD_MSBF_PLANAR
Definition: avcodec.h:642
AV_CODEC_ID_ADPCM_CT
@ AV_CODEC_ID_ADPCM_CT
Definition: avcodec.h:515
AVCodecContext::frame_bits
attribute_deprecated int frame_bits
Definition: avcodec.h:2577
AVCodecParameters::color_primaries
enum AVColorPrimaries color_primaries
Definition: avcodec.h:4045
AV_CODEC_ID_MAD
@ AV_CODEC_ID_MAD
Definition: avcodec.h:347
AVCodecContext::framerate
AVRational framerate
Definition: avcodec.h:3106
AVCodecContext::skip_top
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:2099
AVCodec::max_lowres
uint8_t max_lowres
maximum value for lowres supported by the decoder
Definition: avcodec.h:3507
avcodec_enum_to_chroma_pos
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
Converts AVChromaLocation to swscale x/y chroma position.
AVCodecParserContext::offset
int64_t offset
byte offset from starting packet start
Definition: avcodec.h:5149
av_packet_split_side_data
attribute_deprecated int av_packet_split_side_data(AVPacket *pkt)
AVCodec::encode_sub
int(* encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, const struct AVSubtitle *sub)
Definition: avcodec.h:3566
avcodec_get_pix_fmt_loss
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, int has_alpha)
AVCodecContext::pre_me
attribute_deprecated int pre_me
Definition: avcodec.h:2006
AVHWAccel
Definition: avcodec.h:3650
AV_CODEC_ID_SHEERVIDEO
@ AV_CODEC_ID_SHEERVIDEO
Definition: avcodec.h:435
AVCodecContext::prediction_method
attribute_deprecated int prediction_method
Definition: avcodec.h:1925
AVCodecParserContext::key_frame
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:5158
AVCodecContext::skip_idct
enum AVDiscard skip_idct
Skip IDCT/dequantization for selected frames.
Definition: avcodec.h:3034
AV_CODEC_ID_ASS
@ AV_CODEC_ID_ASS
Definition: avcodec.h:682
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:4064
AVCodecContext::i_quant_factor
float i_quant_factor
qscale factor between P- and I-frames If > 0 then the last P-frame quantizer will be used (q = lastp_...
Definition: avcodec.h:1871
av_codec_is_encoder
int av_codec_is_encoder(const AVCodec *codec)
AVCodecContext::nsse_weight
int nsse_weight
noise vs.
Definition: avcodec.h:2892
av_bsf_alloc
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx)
Allocate a context for a given bitstream filter.
AV_CODEC_ID_PIXLET
@ AV_CODEC_ID_PIXLET
Definition: avcodec.h:438
av_packet_add_side_data
int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
AV_CODEC_ID_MPL2
@ AV_CODEC_ID_MPL2
Definition: avcodec.h:679
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition: avcodec.h:354
AV_CODEC_ID_SPEEX
@ AV_CODEC_ID_SPEEX
Definition: avcodec.h:600
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:1575
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:465
AVCodecContext::skip_frame
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:3041
AVCodecParameters::bits_per_raw_sample
int bits_per_raw_sample
This is the number of valid bits in each output sample.
Definition: avcodec.h:4013
AVCodec::sample_fmts
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3505
AVPacket::convergence_duration
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1507
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:2825
av_packet_pack_dictionary
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
AV_CODEC_ID_MIMIC
@ AV_CODEC_ID_MIMIC
Definition: avcodec.h:331
av_shrink_packet
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
AVCodec::bsfs
const char * bsfs
Decoding only, a comma-separated list of bitstream filters to apply to packets before decoding.
Definition: avcodec.h:3614
AVCodecDescriptor::mime_types
const char *const * mime_types
MIME type(s) associated with the codec.
Definition: avcodec.h:739
AV_CODEC_ID_XAN_DPCM
@ AV_CODEC_ID_XAN_DPCM
Definition: avcodec.h:558
AV_CODEC_ID_MSZH
@ AV_CODEC_ID_MSZH
Definition: avcodec.h:271
AV_CODEC_ID_YUV4
@ AV_CODEC_ID_YUV4
Definition: avcodec.h:423
samplefmt.h
AVSubtitleRect::x
int x
top left corner of pict, undefined when pict is not set
Definition: avcodec.h:3900
AV_CODEC_ID_R210
@ AV_CODEC_ID_R210
Definition: avcodec.h:351
AVCodecContext::initial_padding
int initial_padding
Audio only.
Definition: avcodec.h:3097
AV_CODEC_ID_SMACKAUDIO
@ AV_CODEC_ID_SMACKAUDIO
Definition: avcodec.h:588
av_packet_shrink_side_data
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Shrink the already allocated side data buffer.
AVCodecContext::refs
int refs
number of reference frames
Definition: avcodec.h:2154
avcodec_default_execute2
int avcodec_default_execute2(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int, int), void *arg, int *ret, int count)
AVPanScan::width
int width
width and height in 1/16 pel
Definition: avcodec.h:1113
AVDISCARD_NONE
@ AVDISCARD_NONE
discard nothing
Definition: avcodec.h:806
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1646
AVCodecContext::bit_rate_tolerance
int bit_rate_tolerance
number of bits the bitstream is allowed to diverge from the reference.
Definition: avcodec.h:1624
AV_CODEC_ID_JACOSUB
@ AV_CODEC_ID_JACOSUB
Definition: avcodec.h:671
AV_FIELD_UNKNOWN
@ AV_FIELD_UNKNOWN
Definition: avcodec.h:1545
AVCodecContext::dct_algo
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition: avcodec.h:2756
av_parser_init
AVCodecParserContext * av_parser_init(int codec_id)
AV_CODEC_ID_SUBVIEWER
@ AV_CODEC_ID_SUBVIEWER
Definition: avcodec.h:676
pts
static int64_t pts
Definition: transcode_aac.c:647
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:1754
AVBitStreamFilterContext::next
struct AVBitStreamFilterContext * next
Definition: avcodec.h:5743
AV_PKT_DATA_DISPLAYMATRIX
@ AV_PKT_DATA_DISPLAYMATRIX
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: avcodec.h:1253
AVBSFContext::par_out
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5798
AV_CODEC_ID_SMC
@ AV_CODEC_ID_SMC
Definition: avcodec.h:267
avcodec_copy_context
attribute_deprecated int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:566
avcodec_find_encoder_by_name
AVCodec * avcodec_find_encoder_by_name(const char *name)
Find a registered encoder with the specified name.
AV_CODEC_ID_SUBVIEWER1
@ AV_CODEC_ID_SUBVIEWER1
Definition: avcodec.h:675
avpicture_get_size
attribute_deprecated int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
AV_CODEC_ID_MSMPEG4V2
@ AV_CODEC_ID_MSMPEG4V2
Definition: avcodec.h:233
AV_CODEC_ID_8SVX_FIB
@ AV_CODEC_ID_8SVX_FIB
Definition: avcodec.h:620
AV_CODEC_ID_FFWAVESYNTH
@ AV_CODEC_ID_FFWAVESYNTH
Definition: avcodec.h:634
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:5129
AVSubtitleRect::ass
char * ass
0 terminated ASS/SSA compatible event line.
Definition: avcodec.h:3929
AVHWAccel::priv_data_size
int priv_data_size
Size of the private data to allocate in AVCodecInternal.hwaccel_priv_data.
Definition: avcodec.h:3794
av_codec_set_codec_descriptor
attribute_deprecated void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc)
av_bsf_get_by_name
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
AV_CODEC_ID_ATRAC3
@ AV_CODEC_ID_ATRAC3
Definition: avcodec.h:596
avsubtitle_free
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
AV_PKT_DATA_STRINGS_METADATA
@ AV_PKT_DATA_STRINGS_METADATA
A list of zero terminated key/value strings.
Definition: avcodec.h:1317
AV_LOCK_OBTAIN
@ AV_LOCK_OBTAIN
Lock the mutex.
Definition: avcodec.h:6132
AV_CODEC_ID_DVB_SUBTITLE
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: avcodec.h:660
AV_PKT_DATA_REPLAYGAIN
@ AV_PKT_DATA_REPLAYGAIN
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: avcodec.h:1244
AVCodecContext::get_buffer2
int(* get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)
This callback is called at the beginning of each frame to get data buffer(s) for it.
Definition: avcodec.h:2381
AV_CODEC_ID_SIPR
@ AV_CODEC_ID_SIPR
Definition: avcodec.h:606
AVCodecParameters::color_trc
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4046
AV_CODEC_ID_ADPCM_SBPRO_2
@ AV_CODEC_ID_ADPCM_SBPRO_2
Definition: avcodec.h:520
av_packet_side_data_name
const char * av_packet_side_data_name(enum AVPacketSideDataType type)
AV_CODEC_ID_WMAV1
@ AV_CODEC_ID_WMAV1
Definition: avcodec.h:572
AV_CODEC_ID_SBC
@ AV_CODEC_ID_SBC
Definition: avcodec.h:653
AVCodecContext::p_count
attribute_deprecated int p_count
Definition: avcodec.h:2569
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: avcodec.h:468
AV_PICTURE_STRUCTURE_FRAME
@ AV_PICTURE_STRUCTURE_FRAME
Definition: avcodec.h:5106
AV_CODEC_ID_WMAVOICE
@ AV_CODEC_ID_WMAVOICE
Definition: avcodec.h:601
RcOverride::quality_factor
float quality_factor
Definition: avcodec.h:835
AVCodecContext::color_primaries
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2180
AVCodecParserContext::cur_frame_end
int64_t cur_frame_end[AV_PARSER_PTS_NB]
Definition: avcodec.h:5150
AV_CODEC_ID_MDEC
@ AV_CODEC_ID_MDEC
Definition: avcodec.h:255
AVCodec::supported_samplerates
const int * supported_samplerates
array of supported audio samplerates, or NULL if unknown, array is terminated by 0
Definition: avcodec.h:3504
AV_PKT_DATA_WEBVTT_SETTINGS
@ AV_PKT_DATA_WEBVTT_SETTINGS
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1347
AV_CODEC_ID_MACE3
@ AV_CODEC_ID_MACE3
Definition: avcodec.h:574
AV_CODEC_ID_ATRAC3P
@ AV_CODEC_ID_ATRAC3P
Definition: avcodec.h:604
AVCodecContext::pts_correction_num_faulty_pts
int64_t pts_correction_num_faulty_pts
Current statistics for PTS correction.
Definition: avcodec.h:3143
AV_CODEC_ID_H263I
@ AV_CODEC_ID_H263I
Definition: avcodec.h:238
AVCodecParserContext::parser
struct AVCodecParser * parser
Definition: avcodec.h:5111
av_bsf_get_class
const AVClass * av_bsf_get_class(void)
Get the AVClass for AVBSFContext.
AV_CODEC_ID_XFACE
@ AV_CODEC_ID_XFACE
Definition: avcodec.h:426
AV_CODEC_ID_TTA
@ AV_CODEC_ID_TTA
Definition: avcodec.h:587
AVCodecContext::rc_initial_buffer_occupancy
int rc_initial_buffer_occupancy
Number of bits which should be loaded into the rc buffer before decoding starts.
Definition: avcodec.h:2472
AV_CODEC_ID_TTF
@ AV_CODEC_ID_TTF
Definition: avcodec.h:689
AVHWAccel::alloc_frame
int(* alloc_frame)(AVCodecContext *avctx, AVFrame *frame)
Allocate a custom buffer.
Definition: avcodec.h:3696
AV_PKT_DATA_AUDIO_SERVICE_TYPE
@ AV_PKT_DATA_AUDIO_SERVICE_TYPE
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition: avcodec.h:1265
AVCodecParameters::frame_size
int frame_size
Audio only.
Definition: avcodec.h:4079
AV_CODEC_ID_S302M
@ AV_CODEC_ID_S302M
Definition: avcodec.h:490
AV_CODEC_ID_CFHD
@ AV_CODEC_ID_CFHD
Definition: avcodec.h:431
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1668
AVCodecContext::has_b_frames
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1856
AV_CODEC_ID_4XM
@ AV_CODEC_ID_4XM
Definition: avcodec.h:252
AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS
@ AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS
Definition: avcodec.h:1536
AV_CODEC_ID_ADPCM_G726
@ AV_CODEC_ID_ADPCM_G726
Definition: avcodec.h:514
avcodec_alloc_context3
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
AV_CODEC_ID_MPEG4SYSTEMS
@ AV_CODEC_ID_MPEG4SYSTEMS
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:706
AVCodec::supported_framerates
const AVRational * supported_framerates
array of supported framerates, or NULL if any, array is terminated by {0,0}
Definition: avcodec.h:3502
AV_CODEC_ID_DSICINAUDIO
@ AV_CODEC_ID_DSICINAUDIO
Definition: avcodec.h:591
AVCodecDescriptor
This struct describes the properties of a single codec described by an AVCodecID.
Definition: avcodec.h:717
AV_CODEC_ID_PCM_LXF
@ AV_CODEC_ID_PCM_LXF
Definition: avcodec.h:489
AVCodecContext::stats_in
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2593
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
AVCodecContext::global_quality
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1632
AV_PKT_DATA_STEREO3D
@ AV_PKT_DATA_STEREO3D
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition: avcodec.h:1259
AV_CODEC_ID_BMP
@ AV_CODEC_ID_BMP
Definition: avcodec.h:296
AV_CODEC_ID_WMAPRO
@ AV_CODEC_ID_WMAPRO
Definition: avcodec.h:602
AV_CODEC_HW_CONFIG_METHOD_AD_HOC
@ AV_CODEC_HW_CONFIG_METHOD_AD_HOC
The codec supports this format by some ad-hoc method.
Definition: avcodec.h:3453
AVCodecParserContext::fetch_timestamp
int fetch_timestamp
Definition: avcodec.h:5134
AV_CODEC_ID_KMVC
@ AV_CODEC_ID_KMVC
Definition: avcodec.h:303
AV_CODEC_ID_XMA1
@ AV_CODEC_ID_XMA1
Definition: avcodec.h:645
AVFieldOrder
AVFieldOrder
Definition: avcodec.h:1544
AV_PKT_DATA_MASTERING_DISPLAY_METADATA
@ AV_PKT_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1367
AVHWAccel::uninit
int(* uninit)(AVCodecContext *avctx)
Uninitialize the hwaccel private data.
Definition: avcodec.h:3788
AV_CODEC_ID_ADPCM_AFC
@ AV_CODEC_ID_ADPCM_AFC
Definition: avcodec.h:535
AV_CODEC_ID_ADPCM_IMA_EA_SEAD
@ AV_CODEC_ID_ADPCM_IMA_EA_SEAD
Definition: avcodec.h:526
AVCodecParameters::sample_aspect_ratio
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4034
avpicture_alloc
attribute_deprecated int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height)
AV_CODEC_ID_RL2
@ AV_CODEC_ID_RL2
Definition: avcodec.h:332
RcOverride
Definition: avcodec.h:831
AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED
@ AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED
Definition: avcodec.h:818
AVCodecParserContext::last_pts
int64_t last_pts
Definition: avcodec.h:5132
AVSubtitleRect::y
int y
top left corner of pict, undefined when pict is not set
Definition: avcodec.h:3901
AV_CODEC_ID_VP9
@ AV_CODEC_ID_VP9
Definition: avcodec.h:386
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:4024
AV_CODEC_ID_NUV
@ AV_CODEC_ID_NUV
Definition: avcodec.h:302
AVCodecContext::ticks_per_frame
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1698
AV_CODEC_ID_MP2
@ AV_CODEC_ID_MP2
Definition: avcodec.h:565
AV_CODEC_ID_ADPCM_IMA_DK3
@ AV_CODEC_ID_ADPCM_IMA_DK3
Definition: avcodec.h:505
AV_CODEC_ID_VMDAUDIO
@ AV_CODEC_ID_VMDAUDIO
Definition: avcodec.h:576
AV_CODEC_ID_WS_VQA
@ AV_CODEC_ID_WS_VQA
Definition: avcodec.h:262
AVCodecContext::sub_text_format
int sub_text_format
Control the form of AVSubtitle.rects[N]->ass.
Definition: avcodec.h:3270
AVCodecContext::mv_bits
attribute_deprecated int mv_bits
Definition: avcodec.h:2559
is_have_jjm
int is_have_jjm(void)
AVCodecContext::error_concealment
int error_concealment
error concealment flags
Definition: avcodec.h:2641
AV_CODEC_ID_WMV2
@ AV_CODEC_ID_WMV2
Definition: avcodec.h:236
avcodec_receive_frame
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
av_dup_packet
attribute_deprecated int av_dup_packet(AVPacket *pkt)
AVHWDeviceType
AVHWDeviceType
Definition: hwcontext.h:27
AVSubtitleType
AVSubtitleType
Definition: avcodec.h:3879
AV_CODEC_ID_ADPCM_IMA_APC
@ AV_CODEC_ID_ADPCM_IMA_APC
Definition: avcodec.h:532
AVCodecDescriptor::type
enum AVMediaType type
Definition: avcodec.h:719
AVCodecContext::thread_type
int thread_type
Which multithreading methods to use.
Definition: avcodec.h:2835
AV_CODEC_ID_ATRAC9
@ AV_CODEC_ID_ATRAC9
Definition: avcodec.h:654
AVPicture
Picture data structure.
Definition: avcodec.h:3867
AVCodecContext::brd_scale
attribute_deprecated int brd_scale
Definition: avcodec.h:2139
AV_CODEC_ID_UTVIDEO
@ AV_CODEC_ID_UTVIDEO
Definition: avcodec.h:371
AV_CODEC_ID_ALIAS_PIX
@ AV_CODEC_ID_ALIAS_PIX
Definition: avcodec.h:395
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2797
AVPacketSideData::data
uint8_t * data
Definition: avcodec.h:1422
AV_CODEC_ID_ADPCM_IMA_ISS
@ AV_CODEC_ID_ADPCM_IMA_ISS
Definition: avcodec.h:530
AV_CODEC_ID_BINKAUDIO_DCT
@ AV_CODEC_ID_BINKAUDIO_DCT
Definition: avcodec.h:613
avcodec_fill_audio_frame
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align)
Fill AVFrame audio data and linesize pointers.
RcOverride::start_frame
int start_frame
Definition: avcodec.h:832
AV_CODEC_ID_TIERTEXSEQVIDEO
@ AV_CODEC_ID_TIERTEXSEQVIDEO
Definition: avcodec.h:313
AV_CODEC_ID_PCM_F24LE
@ AV_CODEC_ID_PCM_F24LE
Definition: avcodec.h:499
AVCodecParserContext::format
int format
The format of the coded data, corresponds to enum AVPixelFormat for video and for enum AVSampleFormat...
Definition: avcodec.h:5273
AVBSFContext::time_base_in
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: avcodec.h:5804
AVCodecDescriptor::profiles
const struct AVProfile * profiles
If non-NULL, an array of profiles recognized for this codec.
Definition: avcodec.h:744
AV_CODEC_ID_AURA2
@ AV_CODEC_ID_AURA2
Definition: avcodec.h:342
AV_CODEC_ID_MSMPEG4V1
@ AV_CODEC_ID_MSMPEG4V1
Definition: avcodec.h:232
AVAudioServiceType
AVAudioServiceType
Definition: avcodec.h:815
AVCodecHWConfig::pix_fmt
enum AVPixelFormat pix_fmt
A hardware pixel format which the codec can use.
Definition: avcodec.h:3460
AVSubtitle::pts
int64_t pts
Same as packet pts, in AV_TIME_BASE.
Definition: avcodec.h:3940
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:40
avcodec_align_dimensions2
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
AV_CODEC_ID_SONIC_LS
@ AV_CODEC_ID_SONIC_LS
Definition: avcodec.h:636
AV_CODEC_ID_TARGA_Y216
@ AV_CODEC_ID_TARGA_Y216
Definition: avcodec.h:420
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: avcodec.h:470
AVCodec::update_thread_context
int(* update_thread_context)(AVCodecContext *dst, const AVCodecContext *src)
Copy necessary context variables from a previous thread context to the current one.
Definition: avcodec.h:3549
AVCodecContext::max_pixels
int64_t max_pixels
The number of pixels per image to maximally accept.
Definition: avcodec.h:3293
AV_CODEC_ID_PCM_U16BE
@ AV_CODEC_ID_PCM_U16BE
Definition: avcodec.h:467
av_picture_copy
attribute_deprecated void av_picture_copy(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height)
AVBitStreamFilter::codec_ids
enum AVCodecID * codec_ids
A list of codec ids supported by the filter, terminated by AV_CODEC_ID_NONE.
Definition: avcodec.h:5821
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
av_bsf_free
void av_bsf_free(AVBSFContext **ctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
AV_CODEC_ID_CODEC2
@ AV_CODEC_ID_CODEC2
Definition: avcodec.h:632
AV_CODEC_ID_ADPCM_IMA_SMJPEG
@ AV_CODEC_ID_ADPCM_IMA_SMJPEG
Definition: avcodec.h:508
AV_CODEC_ID_DOLBY_E
@ AV_CODEC_ID_DOLBY_E
Definition: avcodec.h:650
AV_CODEC_ID_PCM_DVD
@ AV_CODEC_ID_PCM_DVD
Definition: avcodec.h:483
AVHWAccel::decode_params
int(* decode_params)(AVCodecContext *avctx, int type, const uint8_t *buf, uint32_t buf_size)
Callback for parameter data (SPS/PPS/VPS etc).
Definition: avcodec.h:3726
AV_CODEC_ID_FFVHUFF
@ AV_CODEC_ID_FFVHUFF
Definition: avcodec.h:285
AVCodecContext::rc_max_rate
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2444
AV_CODEC_ID_SVQ3
@ AV_CODEC_ID_SVQ3
Definition: avcodec.h:241
AV_CODEC_ID_RALF
@ AV_CODEC_ID_RALF
Definition: avcodec.h:622
AV_CODEC_ID_VC1IMAGE
@ AV_CODEC_ID_VC1IMAGE
Definition: avcodec.h:370
AVCodecContext::error
uint64_t error[AV_NUM_DATA_POINTERS]
error
Definition: avcodec.h:2749
AV_CODEC_ID_WRAPPED_AVFRAME
@ AV_CODEC_ID_WRAPPED_AVFRAME
Passthrough codec, AVFrames wrapped in AVPacket.
Definition: avcodec.h:709
AV_CODEC_ID_XAN_WC4
@ AV_CODEC_ID_XAN_WC4
Definition: avcodec.h:259
AVSubtitleRect::text
char * text
0 terminated plain UTF-8 text
Definition: avcodec.h:3922
AVCPBProperties
This structure describes the bitrate properties of an encoded bitstream.
Definition: avcodec.h:1129
AVSideDataParamChangeFlags
AVSideDataParamChangeFlags
Definition: avcodec.h:1532
AVDISCARD_BIDIR
@ AVDISCARD_BIDIR
discard all bidirectional frames
Definition: avcodec.h:809
AV_CODEC_ID_H264
@ AV_CODEC_ID_H264
Definition: avcodec.h:245
av_packet_new_side_data
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
av_get_codec_tag_string
attribute_deprecated size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1576
AVCodecContext::p_masking
float p_masking
p block masking (0-> disabled)
Definition: avcodec.h:1906
av_packet_get_side_data
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
av_bitstream_filter_next
const attribute_deprecated AVBitStreamFilter * av_bitstream_filter_next(const AVBitStreamFilter *f)
AVCodec::init_thread_copy
int(* init_thread_copy)(AVCodecContext *)
If defined, called on thread contexts when they are created.
Definition: avcodec.h:3541
AV_CODEC_ID_DVD_NAV
@ AV_CODEC_ID_DVD_NAV
Definition: avcodec.h:697
AV_CODEC_ID_ARIB_CAPTION
@ AV_CODEC_ID_ARIB_CAPTION
Definition: avcodec.h:685
AVCodecDescriptor::props
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:733
AV_CODEC_ID_PNG
@ AV_CODEC_ID_PNG
Definition: avcodec.h:279
AV_CODEC_ID_AVUI
@ AV_CODEC_ID_AVUI
Definition: avcodec.h:418
AVCodecParserContext::dts_ref_dts_delta
int dts_ref_dts_delta
Offset of the current timestamp against last timestamp sync point in units of AVCodecContext....
Definition: avcodec.h:5193
AVCodecParserContext::repeat_pict
int repeat_pict
This field is used for proper frame duration computation in lavf.
Definition: avcodec.h:5127
AV_CODEC_ID_TDSC
@ AV_CODEC_ID_TDSC
Definition: avcodec.h:405
AV_PICTURE_STRUCTURE_BOTTOM_FIELD
@ AV_PICTURE_STRUCTURE_BOTTOM_FIELD
Definition: avcodec.h:5105
AV_CODEC_ID_AVRN
@ AV_CODEC_ID_AVRN
Definition: avcodec.h:424
AV_CODEC_ID_WEBVTT
@ AV_CODEC_ID_WEBVTT
Definition: avcodec.h:678
AVCodecContext::rc_buffer_size
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2429
AVCodecContext::sub_charenc
char * sub_charenc
DTS of the last frame.
Definition: avcodec.h:3153
AV_CODEC_ID_AVS3
@ AV_CODEC_ID_AVS3
Definition: avcodec.h:413
AVCPBProperties::avg_bitrate
int avg_bitrate
Average bitrate of the stream, in bits per second.
Definition: avcodec.h:1153
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:812
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: avcodec.h:471
AV_CODEC_ID_WMV3
@ AV_CODEC_ID_WMV3
Definition: avcodec.h:289
AV_CODEC_ID_FLASHSV2
@ AV_CODEC_ID_FLASHSV2
Definition: avcodec.h:349
avcodec_descriptor_next
const AVCodecDescriptor * avcodec_descriptor_next(const AVCodecDescriptor *prev)
Iterate over all codec descriptors known to libavcodec.
AV_CODEC_ID_EXR
@ AV_CODEC_ID_EXR
Definition: avcodec.h:398
AVPacket::buf
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1461
AV_CODEC_ID_ADPCM_EA_XAS
@ AV_CODEC_ID_ADPCM_EA_XAS
Definition: avcodec.h:528
AVSubtitleRect::w
int w
width of pict, undefined when pict is not set
Definition: avcodec.h:3902
AV_CODEC_ID_SP5X
@ AV_CODEC_ID_SP5X
Definition: avcodec.h:228
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
avcodec_get_class
const AVClass * avcodec_get_class(void)
Get the AVClass for AVCodecContext.
AVCodecContext::max_prediction_order
attribute_deprecated int max_prediction_order
Definition: avcodec.h:2524
AV_CODEC_ID_MSS1
@ AV_CODEC_ID_MSS1
Definition: avcodec.h:380
AV_CODEC_ID_XWD
@ AV_CODEC_ID_XWD
Definition: avcodec.h:376
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: avcodec.h:647
AVCodecContext::apply_cropping
int apply_cropping
Video decoding only.
Definition: avcodec.h:3351
AVCodecContext::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2201
AV_CODEC_ID_INTERPLAY_VIDEO
@ AV_CODEC_ID_INTERPLAY_VIDEO
Definition: avcodec.h:257
AVCodecParser::codec_ids
int codec_ids[5]
Definition: avcodec.h:5277
AV_CODEC_ID_AV1
@ AV_CODEC_ID_AV1
Definition: avcodec.h:444
avcodec_parameters_free
void avcodec_parameters_free(AVCodecParameters **par)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
AV_CODEC_ID_ADPCM_YAMAHA
@ AV_CODEC_ID_ADPCM_YAMAHA
Definition: avcodec.h:517
AV_CODEC_ID_ZEROCODEC
@ AV_CODEC_ID_ZEROCODEC
Definition: avcodec.h:379
AV_CODEC_ID_TIMED_ID3
@ AV_CODEC_ID_TIMED_ID3
Definition: avcodec.h:698
AV_CODEC_ID_ADPCM_IMA_WS
@ AV_CODEC_ID_ADPCM_IMA_WS
Definition: avcodec.h:507
AVCodecContext::i_tex_bits
attribute_deprecated int i_tex_bits
Definition: avcodec.h:2563
AV_CODEC_ID_PCM_U24BE
@ AV_CODEC_ID_PCM_U24BE
Definition: avcodec.h:479
AVCodecContext::slice_flags
int slice_flags
slice flags
Definition: avcodec.h:2044
av_bsf_list_alloc
AVBSFList * av_bsf_list_alloc(void)
Allocate empty list of bitstream filters.
AVCodec::type
enum AVMediaType type
Definition: avcodec.h:3495
AVCodecParser::parser_close
void(* parser_close)(AVCodecParserContext *s)
Definition: avcodec.h:5286
AV_CODEC_ID_PICTOR
@ AV_CODEC_ID_PICTOR
Definition: avcodec.h:359
AVCodecContext::misc_bits
attribute_deprecated int misc_bits
Definition: avcodec.h:2573
AV_CODEC_ID_MOV_TEXT
@ AV_CODEC_ID_MOV_TEXT
Definition: avcodec.h:664
AV_CODEC_ID_FITS
@ AV_CODEC_ID_FITS
Definition: avcodec.h:450
avcodec_free_context
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_CODEC_ID_INTERPLAY_DPCM
@ AV_CODEC_ID_INTERPLAY_DPCM
Definition: avcodec.h:557
AV_CODEC_ID_ADPCM_IMA_EA_EACS
@ AV_CODEC_ID_ADPCM_IMA_EA_EACS
Definition: avcodec.h:527
AV_CODEC_ID_PCM_U32BE
@ AV_CODEC_ID_PCM_U32BE
Definition: avcodec.h:475
AVCodecContext::nb_coded_side_data
int nb_coded_side_data
Definition: avcodec.h:3239
AVCodecContext::qblur
float qblur
amount of qscale smoothing over time (0.0-1.0)
Definition: avcodec.h:2401
AV_CODEC_ID_Y41P
@ AV_CODEC_ID_Y41P
Definition: avcodec.h:415
AV_CODEC_ID_WMALOSSLESS
@ AV_CODEC_ID_WMALOSSLESS
Definition: avcodec.h:603
AV_PICTURE_STRUCTURE_TOP_FIELD
@ AV_PICTURE_STRUCTURE_TOP_FIELD
Definition: avcodec.h:5104
AV_CODEC_ID_ADPCM_VIMA
@ AV_CODEC_ID_ADPCM_VIMA
Definition: avcodec.h:533
AV_CODEC_ID_ADPCM_IMA_DK4
@ AV_CODEC_ID_ADPCM_IMA_DK4
Definition: avcodec.h:506
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1616
AV_CODEC_ID_G723_1
@ AV_CODEC_ID_G723_1
Definition: avcodec.h:617
AVPacketSideData::type
enum AVPacketSideDataType type
Definition: avcodec.h:1424
AVCodecParser::split
int(* split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: avcodec.h:5287
AV_CODEC_ID_CINEPAK
@ AV_CODEC_ID_CINEPAK
Definition: avcodec.h:261
AV_CODEC_ID_PGMYUV
@ AV_CODEC_ID_PGMYUV
Definition: avcodec.h:283
AV_CODEC_ID_DVD_SUBTITLE
@ AV_CODEC_ID_DVD_SUBTITLE
Definition: avcodec.h:659
AV_CODEC_ID_MOTIONPIXELS
@ AV_CODEC_ID_MOTIONPIXELS
Definition: avcodec.h:337
AVBitStreamFilter::close
void(* close)(AVBSFContext *ctx)
Definition: avcodec.h:5845
AV_CODEC_ID_CPIA
@ AV_CODEC_ID_CPIA
Definition: avcodec.h:425
AVHWAccel::end_frame
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3751
AV_CODEC_ID_SMV
@ AV_CODEC_ID_SMV
Definition: avcodec.h:638
AVCodecContext::subtitle_header_size
int subtitle_header_size
Definition: avcodec.h:3052
AVSubtitleRect::data
uint8_t * data[4]
data+linesize for the bitmap of this subtitle.
Definition: avcodec.h:3917
AV_CODEC_ID_PCM_S64BE
@ AV_CODEC_ID_PCM_S64BE
Definition: avcodec.h:497
AV_CODEC_ID_ZLIB
@ AV_CODEC_ID_ZLIB
Definition: avcodec.h:272
AVCodec::profiles
const AVProfile * profiles
array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
Definition: avcodec.h:3509
AV_CODEC_ID_SPEEDHQ
@ AV_CODEC_ID_SPEEDHQ
Definition: avcodec.h:439
AV_CODEC_ID_FMVC
@ AV_CODEC_ID_FMVC
Definition: avcodec.h:440
AVCodecContext::trailing_padding
int trailing_padding
Audio only.
Definition: avcodec.h:3285
av_codec_get_pkt_timebase
attribute_deprecated AVRational av_codec_get_pkt_timebase(const AVCodecContext *avctx)
Accessors for some AVCodecContext fields.
avcodec_get_context_defaults3
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
AVBitStreamFilter::priv_class
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: avcodec.h:5832
AVCodecContext::ildct_cmp
int ildct_cmp
interlaced DCT comparison function
Definition: avcodec.h:1970
AVCodecContext::b_frame_strategy
attribute_deprecated int b_frame_strategy
Definition: avcodec.h:1840
AVCodecContext::noise_reduction
attribute_deprecated int noise_reduction
Definition: avcodec.h:2084
avcodec_license
const char * avcodec_license(void)
Return the libavcodec license.
AV_CODEC_ID_MPEG2TS
@ AV_CODEC_ID_MPEG2TS
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:704
AV_CODEC_ID_ADPCM_IMA_AMV
@ AV_CODEC_ID_ADPCM_IMA_AMV
Definition: avcodec.h:522
AV_CODEC_ID_ANM
@ AV_CODEC_ID_ANM
Definition: avcodec.h:352
AVCodecContext::rc_min_vbv_overflow_use
float rc_min_vbv_overflow_use
Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.
Definition: avcodec.h:2465
avcodec_open2
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
AVCodecParserContext::flags
int flags
Definition: avcodec.h:5142
avcodec_version
unsigned avcodec_version(void)
Return the LIBAVCODEC_VERSION_INT constant.
AV_AUDIO_SERVICE_TYPE_MAIN
@ AV_AUDIO_SERVICE_TYPE_MAIN
Definition: avcodec.h:816
AVCodecContext::me_cmp
int me_cmp
motion estimation comparison function
Definition: avcodec.h:1952
AV_CODEC_ID_ROQ_DPCM
@ AV_CODEC_ID_ROQ_DPCM
Definition: avcodec.h:556
AVCodecParserContext::picture_structure
enum AVPictureStructure picture_structure
Indicate whether a picture is coded as a frame, top field or bottom field.
Definition: avcodec.h:5243
AVCodecContext::context_model
attribute_deprecated int context_model
Definition: avcodec.h:2489
AV_CODEC_ID_FLASHSV
@ AV_CODEC_ID_FLASHSV
Definition: avcodec.h:304
AVCodecContext::trellis
int trellis
trellis RD quantization
Definition: avcodec.h:2515
AVProfile::profile
int profile
Definition: avcodec.h:3416
AV_CODEC_ID_SMPTE_KLV
@ AV_CODEC_ID_SMPTE_KLV
Definition: avcodec.h:696
AVCodec::receive_packet
int(* receive_packet)(AVCodecContext *avctx, AVPacket *avpkt)
Definition: avcodec.h:3591
AV_CODEC_ID_QDM2
@ AV_CODEC_ID_QDM2
Definition: avcodec.h:584
AV_CODEC_ID_WMV1
@ AV_CODEC_ID_WMV1
Definition: avcodec.h:235
AV_PKT_DATA_SUBTITLE_POSITION
@ AV_PKT_DATA_SUBTITLE_POSITION
Subtitle event position.
Definition: avcodec.h:1328
AVCodec::init
int(* init)(AVCodecContext *)
Definition: avcodec.h:3565
av_packet_ref
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
AV_CODEC_ID_FIRST_UNKNOWN
@ AV_CODEC_ID_FIRST_UNKNOWN
A dummy ID pointing at the start of various fake codecs.
Definition: avcodec.h:688
av_packet_move_ref
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
AV_CODEC_ID_VMDVIDEO
@ AV_CODEC_ID_VMDVIDEO
Definition: avcodec.h:270
AV_CODEC_ID_VP6A
@ AV_CODEC_ID_VP6A
Definition: avcodec.h:324
av_cpb_properties_alloc
AVCPBProperties * av_cpb_properties_alloc(size_t *size)
Allocate a CPB properties structure and initialize its fields to default values.
AV_CODEC_ID_VP4
@ AV_CODEC_ID_VP4
Definition: avcodec.h:460
AV_CODEC_ID_MAGICYUV
@ AV_CODEC_ID_MAGICYUV
Definition: avcodec.h:434
AVCodecContext::level
int level
level
Definition: avcodec.h:3019
AV_CODEC_ID_MP4ALS
@ AV_CODEC_ID_MP4ALS
Definition: avcodec.h:610
AVCodecParameters::level
int level
Definition: avcodec.h:4019
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:4068
AV_CODEC_ID_MPEG1VIDEO
@ AV_CODEC_ID_MPEG1VIDEO
Definition: avcodec.h:219
AV_CODEC_ID_PCM_S24LE_PLANAR
@ AV_CODEC_ID_PCM_S24LE_PLANAR
Definition: avcodec.h:492
AV_CODEC_ID_ADPCM_XA
@ AV_CODEC_ID_ADPCM_XA
Definition: avcodec.h:511
AV_CODEC_ID_CDGRAPHICS
@ AV_CODEC_ID_CDGRAPHICS
Definition: avcodec.h:350
AV_CODEC_ID_VCR1
@ AV_CODEC_ID_VCR1
Definition: avcodec.h:253
avcodec_get_subtitle_rect_class
const AVClass * avcodec_get_subtitle_rect_class(void)
Get the AVClass for AVSubtitleRect.
av_packet_merge_side_data
attribute_deprecated int av_packet_merge_side_data(AVPacket *pkt)
AV_CODEC_ID_GSM
@ AV_CODEC_ID_GSM
as in Berlin toast format
Definition: avcodec.h:583
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
AV_CODEC_ID_PCM_VIDC
@ AV_CODEC_ID_PCM_VIDC
Definition: avcodec.h:500
AV_CODEC_ID_EAC3
@ AV_CODEC_ID_EAC3
Definition: avcodec.h:605
AV_CODEC_ID_MJPEGB
@ AV_CODEC_ID_MJPEGB
Definition: avcodec.h:226
AVCodecContext::temporal_cplx_masking
float temporal_cplx_masking
temporary complexity masking (0-> disabled)
Definition: avcodec.h:1892
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3976
av_register_bitstream_filter
attribute_deprecated void av_register_bitstream_filter(AVBitStreamFilter *bsf)
AV_CODEC_ID_ATRAC3AL
@ AV_CODEC_ID_ATRAC3AL
Definition: avcodec.h:648
AV_AUDIO_SERVICE_TYPE_KARAOKE
@ AV_AUDIO_SERVICE_TYPE_KARAOKE
Definition: avcodec.h:824
AV_CODEC_ID_AAC
@ AV_CODEC_ID_AAC
Definition: avcodec.h:567
avcodec_get_frame_class
const AVClass * avcodec_get_frame_class(void)
Get the AVClass for AVFrame.
AV_CODEC_ID_FRAPS
@ AV_CODEC_ID_FRAPS
Definition: avcodec.h:294
AVCodecContext::qcompress
float qcompress
amount of qscale change between easy & hard scenes (0.0-1.0)
Definition: avcodec.h:2400
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:1689
AV_CODEC_ID_LSCR
@ AV_CODEC_ID_LSCR
Definition: avcodec.h:459
AV_CODEC_ID_WCMV
@ AV_CODEC_ID_WCMV
Definition: avcodec.h:454
AVCodecContext::lowres
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2805
AV_CODEC_ID_QCELP
@ AV_CODEC_ID_QCELP
Definition: avcodec.h:589
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
AV_CODEC_ID_INDEO2
@ AV_CODEC_ID_INDEO2
Definition: avcodec.h:293
AVCodecContext::stats_out
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2585
AV_CODEC_ID_SSA
@ AV_CODEC_ID_SSA
Definition: avcodec.h:663
AV_CODEC_ID_FFV1
@ AV_CODEC_ID_FFV1
Definition: avcodec.h:251
AVDISCARD_NONKEY
@ AVDISCARD_NONKEY
discard all frames except keyframes
Definition: avcodec.h:811
AV_CODEC_ID_PAM
@ AV_CODEC_ID_PAM
Definition: avcodec.h:284
av_packet_from_data
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
Initialize a reference-counted packet from av_malloc()ed data.
AVCodecContext::rc_override
RcOverride * rc_override
Definition: avcodec.h:2437
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: avcodec.h:476
AV_CODEC_ID_ROQ
@ AV_CODEC_ID_ROQ
Definition: avcodec.h:256
AVCodecContext::vbv_delay
attribute_deprecated uint64_t vbv_delay
VBV delay coded in the last frame (in periods of a 27 MHz clock).
Definition: avcodec.h:3064
AVCodecContext::flags2
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1653
AV_CODEC_ID_CLJR
@ AV_CODEC_ID_CLJR
Definition: avcodec.h:254
AV_CODEC_ID_OTF
@ AV_CODEC_ID_OTF
Definition: avcodec.h:695
AV_CODEC_ID_SCPR
@ AV_CODEC_ID_SCPR
Definition: avcodec.h:441
AVMediaType
AVMediaType
Definition: avutil.h:199
av_codec_set_lowres
attribute_deprecated void av_codec_set_lowres(AVCodecContext *avctx, int val)
av_bsf_list_free
void av_bsf_list_free(AVBSFList **lst)
Free list of bitstream filters.
AVCodecParserContext::frame_offset
int64_t frame_offset
Definition: avcodec.h:5112
AV_CODEC_ID_ADPCM_ADX
@ AV_CODEC_ID_ADPCM_ADX
Definition: avcodec.h:512
AVPacket::size
int size
Definition: avcodec.h:1479
AVCodecContext::gop_size
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1761
AV_CODEC_ID_IDF
@ AV_CODEC_ID_IDF
Definition: avcodec.h:694
av_bsf_flush
void av_bsf_flush(AVBSFContext *ctx)
Reset the internal bitstream filter state / flush internal buffers.
AVDISCARD_DEFAULT
@ AVDISCARD_DEFAULT
discard useless packets like 0 size packets in avi
Definition: avcodec.h:807
AVCodecContext::extra_hw_frames
int extra_hw_frames
Definition: avcodec.h:3365
av_bsf_list_parse_str
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
AV_CODEC_ID_YLC
@ AV_CODEC_ID_YLC
Definition: avcodec.h:436
AV_CODEC_ID_ADPCM_IMA_RAD
@ AV_CODEC_ID_ADPCM_IMA_RAD
Definition: avcodec.h:538
av_bsf_next
const attribute_deprecated AVBitStreamFilter * av_bsf_next(void **opaque)
cpu.h
AV_CODEC_ID_DSD_MSBF
@ AV_CODEC_ID_DSD_MSBF
Definition: avcodec.h:640
AVCodecParserContext::next_frame_offset
int64_t next_frame_offset
Definition: avcodec.h:5115
av_get_profile_name
const char * av_get_profile_name(const AVCodec *codec, int profile)
Return a name for the specified profile, if available.
AV_CODEC_ID_RASC
@ AV_CODEC_ID_RASC
Definition: avcodec.h:455
AVCodecParserContext::cur_frame_offset
int64_t cur_frame_offset[AV_PARSER_PTS_NB]
Definition: avcodec.h:5138
height
static int height
Definition: demuxing_decoding.c:39
AV_CODEC_ID_DXV
@ AV_CODEC_ID_DXV
Definition: avcodec.h:409
AV_CODEC_ID_DTS
@ AV_CODEC_ID_DTS
Definition: avcodec.h:569
AVCodecContext::frame_skip_exp
attribute_deprecated int frame_skip_exp
Definition: avcodec.h:2503
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2234
AVCodecContext::pkt_timebase
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3120
AV_CODEC_ID_AYUV
@ AV_CODEC_ID_AYUV
Definition: avcodec.h:419
AV_CODEC_ID_H263
@ AV_CODEC_ID_H263
Definition: avcodec.h:222
AVCodec::defaults
const AVCodecDefault * defaults
Private codec-specific defaults.
Definition: avcodec.h:3555
AV_CODEC_ID_ADPCM_SWF
@ AV_CODEC_ID_ADPCM_SWF
Definition: avcodec.h:516
avcodec_find_best_pix_fmt2
attribute_deprecated enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
AV_CODEC_ID_SMVJPEG
@ AV_CODEC_ID_SMVJPEG
Definition: avcodec.h:428
AV_CODEC_ID_V408
@ AV_CODEC_ID_V408
Definition: avcodec.h:422
AVCodecParserContext::width
int width
Dimensions of the decoded video intended for presentation.
Definition: avcodec.h:5256
AV_NUM_DATA_POINTERS
#define AV_NUM_DATA_POINTERS
Definition: frame.h:296
AV_CODEC_ID_BINTEXT
@ AV_CODEC_ID_BINTEXT
Definition: avcodec.h:692
AV_CODEC_ID_QDMC
@ AV_CODEC_ID_QDMC
Definition: avcodec.h:615
AV_CODEC_ID_V210
@ AV_CODEC_ID_V210
Definition: avcodec.h:345
AVCodecContext::rtp_payload_size
attribute_deprecated int rtp_payload_size
Definition: avcodec.h:2548
AVCodecContext::me_range
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:2037
AVCodecParser::parser_parse
int(* parser_parse)(AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition: avcodec.h:5282
AVCodecParameters::profile
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:4018
AV_CODEC_ID_MSRLE
@ AV_CODEC_ID_MSRLE
Definition: avcodec.h:263
AV_CODEC_ID_CYUV
@ AV_CODEC_ID_CYUV
Definition: avcodec.h:244
AV_CODEC_ID_PCX
@ AV_CODEC_ID_PCX
Definition: avcodec.h:327
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition: avcodec.h:625
AVCodecContext::skip_alpha
int skip_alpha
Skip processing alpha if supported by codec.
Definition: avcodec.h:3179
AVCodecContext::chroma_intra_matrix
uint16_t * chroma_intra_matrix
custom intra quantization matrix
Definition: avcodec.h:3205
AVCodecContext::skip_bottom
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2106
AVCodecContext::last_predictor_count
int last_predictor_count
amount of previous MV predictors (2a+1 x 2a+1 square)
Definition: avcodec.h:2001
AV_PKT_DATA_H263_MB_INFO
@ AV_PKT_DATA_H263_MB_INFO
An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of structures with info about macroblo...
Definition: avcodec.h:1238
av_codec_get_chroma_intra_matrix
attribute_deprecated uint16_t * av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx)
AVSubtitle::end_display_time
uint32_t end_display_time
Definition: avcodec.h:3937
AV_CODEC_ID_8BPS
@ AV_CODEC_ID_8BPS
Definition: avcodec.h:266
frame.h
AVCodec::init_static_data
void(* init_static_data)(struct AVCodec *codec)
Initialize codec static data, called from avcodec_register().
Definition: avcodec.h:3563
AV_CODEC_HW_CONFIG_METHOD_INTERNAL
@ AV_CODEC_HW_CONFIG_METHOD_INTERNAL
The codec supports this format by some internal method.
Definition: avcodec.h:3444
AVSubtitleRect::type
enum AVSubtitleType type
Definition: avcodec.h:3920
SUBTITLE_TEXT
@ SUBTITLE_TEXT
Plain text, the text field must be set by the decoder and is authoritative.
Definition: avcodec.h:3888
AVCodec::send_frame
int(* send_frame)(AVCodecContext *avctx, const AVFrame *frame)
Encode API with decoupled packet/frame dataflow.
Definition: avcodec.h:3590
buffer.h
attribute_deprecated
#define attribute_deprecated
Definition: attributes.h:98
avcodec_find_decoder
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
SUBTITLE_NONE
@ SUBTITLE_NONE
Definition: avcodec.h:3880
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: avcodec.h:1477
AV_CODEC_ID_COMFORT_NOISE
@ AV_CODEC_ID_COMFORT_NOISE
Definition: avcodec.h:626
encode
static void encode(AVCodecContext *ctx, AVFrame *frame, AVPacket *pkt, FILE *output)
Definition: encode_audio.c:95
AVCodecContext::me_sub_cmp
int me_sub_cmp
subpixel motion estimation comparison function
Definition: avcodec.h:1958
AVCodecContext::pts_correction_num_faulty_dts
int64_t pts_correction_num_faulty_dts
Number of incorrect PTS values so far.
Definition: avcodec.h:3144
av_register_codec_parser
attribute_deprecated void av_register_codec_parser(AVCodecParser *parser)
AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX
@ AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX
The codec supports this format via the hw_frames_ctx interface.
Definition: avcodec.h:3437
AVCodecContext::coder_type
attribute_deprecated int coder_type
Definition: avcodec.h:2483
AV_CODEC_ID_IMM4
@ AV_CODEC_ID_IMM4
Definition: avcodec.h:451
AVCodecContext::pts_correction_last_pts
int64_t pts_correction_last_pts
Number of incorrect DTS values so far.
Definition: avcodec.h:3145
AV_CODEC_ID_QPEG
@ AV_CODEC_ID_QPEG
Definition: avcodec.h:278
avcodec_find_best_pix_fmt_of_2
enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
AVPacketSideData::size
int size
Definition: avcodec.h:1423
AVCPBProperties::max_bitrate
int max_bitrate
Maximum bitrate of the stream, in bits per second.
Definition: avcodec.h:1135
AV_FIELD_TT
@ AV_FIELD_TT
Definition: avcodec.h:1547
AV_CODEC_ID_RV30
@ AV_CODEC_ID_RV30
Definition: avcodec.h:286
width
static int width
Definition: demuxing_decoding.c:39
avcodec_default_execute
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
AVCodecContext::request_sample_fmt
enum AVSampleFormat request_sample_fmt
desired sample format
Definition: avcodec.h:2299
AVPacketSideDataType
AVPacketSideDataType
Definition: avcodec.h:1185
av_bsf_list_finalize
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
Finalize list of bitstream filters.
av_picture_pad
attribute_deprecated int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int *color)
avcodec_encode_video2
attribute_deprecated int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of video.
attributes.h
AV_PKT_DATA_CONTENT_LIGHT_LEVEL
@ AV_PKT_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition: avcodec.h:1380
AV_CODEC_ID_MMVIDEO
@ AV_CODEC_ID_MMVIDEO
Definition: avcodec.h:298
av_packet_make_refcounted
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1484
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
AV_CODEC_ID_QDRAW
@ AV_CODEC_ID_QDRAW
Definition: avcodec.h:276
AV_CODEC_ID_V210X
@ AV_CODEC_ID_V210X
Definition: avcodec.h:343
AVCodecContext::skip_loop_filter
enum AVDiscard skip_loop_filter
Skip loop filtering for selected frames.
Definition: avcodec.h:3027
av_packet_unpack_dictionary
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
Unpack a dictionary from side_data.
AV_CODEC_ID_BITPACKED
@ AV_CODEC_ID_BITPACKED
Definition: avcodec.h:445
AV_CODEC_ID_XPM
@ AV_CODEC_ID_XPM
Definition: avcodec.h:443
AV_CODEC_ID_DXA
@ AV_CODEC_ID_DXA
Definition: avcodec.h:316
AV_CODEC_ID_SVG
@ AV_CODEC_ID_SVG
Definition: avcodec.h:448
AV_CODEC_ID_INDEO4
@ AV_CODEC_ID_INDEO4
Definition: avcodec.h:329
av_packet_rescale_ts
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
AVCodecContext::i_count
attribute_deprecated int i_count
Definition: avcodec.h:2567
AVCodecDefault
struct AVCodecDefault AVCodecDefault
Definition: avcodec.h:3475
av_hwaccel_next
attribute_deprecated AVHWAccel * av_hwaccel_next(const AVHWAccel *hwaccel)
If hwaccel is NULL, returns the first registered hardware accelerator, if hwaccel is non-NULL,...
AV_CODEC_ID_SVQ1
@ AV_CODEC_ID_SVQ1
Definition: avcodec.h:240
AV_LOCK_CREATE
@ AV_LOCK_CREATE
Create a mutex.
Definition: avcodec.h:6131
avpicture_free
attribute_deprecated void avpicture_free(AVPicture *picture)
AV_PKT_DATA_METADATA_UPDATE
@ AV_PKT_DATA_METADATA_UPDATE
A list of zero terminated key/value strings.
Definition: avcodec.h:1354
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
SUBTITLE_BITMAP
@ SUBTITLE_BITMAP
A bitmap, pict will be set.
Definition: avcodec.h:3882
AV_CODEC_ID_TSCC2
@ AV_CODEC_ID_TSCC2
Definition: avcodec.h:382
av_picture_crop
attribute_deprecated int av_picture_crop(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int top_band, int left_band)
AVCodecContext::b_quant_factor
float b_quant_factor
qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q...
Definition: avcodec.h:1835
AV_CODEC_ID_ASV1
@ AV_CODEC_ID_ASV1
Definition: avcodec.h:249
AVCodecParserContext::cur_frame_pts
int64_t cur_frame_pts[AV_PARSER_PTS_NB]
Definition: avcodec.h:5139
AV_CODEC_ID_MSS2
@ AV_CODEC_ID_MSS2
Definition: avcodec.h:385
AVCodecContext::channels
int channels
number of audio channels
Definition: avcodec.h:2227
AVCodec::encode2
int(* encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode data to an AVPacket.
Definition: avcodec.h:3578
AVChromaLocation
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:541
AVCodec::id
enum AVCodecID id
Definition: avcodec.h:3496
AVCodecParserContext::cur_frame_pos
int64_t cur_frame_pos[AV_PARSER_PTS_NB]
Position of the packet in file.
Definition: avcodec.h:5214
AV_CODEC_ID_HQ_HQA
@ AV_CODEC_ID_HQ_HQA
Definition: avcodec.h:406
AV_CODEC_ID_VP5
@ AV_CODEC_ID_VP5
Definition: avcodec.h:308
AVHWAccel::name
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3656
AV_CODEC_ID_XAN_WC3
@ AV_CODEC_ID_XAN_WC3
Definition: avcodec.h:258
avcodec_parameters_alloc
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
AV_CODEC_ID_STL
@ AV_CODEC_ID_STL
Definition: avcodec.h:674
AVCPBProperties::vbv_delay
uint64_t vbv_delay
The delay between the time the packet this structure is associated with is received and the time when...
Definition: avcodec.h:1171
AV_CODEC_ID_VP3
@ AV_CODEC_ID_VP3
Definition: avcodec.h:247
AV_CODEC_ID_GIF
@ AV_CODEC_ID_GIF
Definition: avcodec.h:315
AV_LOCK_DESTROY
@ AV_LOCK_DESTROY
Free mutex resources.
Definition: avcodec.h:6134
AV_CODEC_ID_TGV
@ AV_CODEC_ID_TGV
Definition: avcodec.h:338
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: avcodec.h:225
AV_CODEC_ID_VP7
@ AV_CODEC_ID_VP7
Definition: avcodec.h:399
AVSubtitleRect::flags
int flags
Definition: avcodec.h:3931
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2790
avcodec_default_get_buffer2
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
avcodec_send_packet
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
AV_PKT_DATA_JP_DUALMONO
@ AV_PKT_DATA_JP_DUALMONO
An AV_PKT_DATA_JP_DUALMONO side data packet indicates that the packet may contain "dual mono" audio s...
Definition: avcodec.h:1311
AVCodecContext::timecode_frame_start
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2528
AV_CODEC_ID_ATRAC1
@ AV_CODEC_ID_ATRAC1
Definition: avcodec.h:611
AV_CODEC_ID_HQX
@ AV_CODEC_ID_HQX
Definition: avcodec.h:404
av_packet_copy_props
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
AV_CODEC_ID_RA_288
@ AV_CODEC_ID_RA_288
Definition: avcodec.h:553
AV_CODEC_ID_ADPCM_MTAF
@ AV_CODEC_ID_ADPCM_MTAF
Definition: avcodec.h:544
AV_CODEC_ID_ADPCM_EA_MAXIS_XA
@ AV_CODEC_ID_ADPCM_EA_MAXIS_XA
Definition: avcodec.h:529
AV_CODEC_ID_RV40
@ AV_CODEC_ID_RV40
Definition: avcodec.h:287
AV_CODEC_ID_RV10
@ AV_CODEC_ID_RV10
Definition: avcodec.h:223
AVCodecParserContext::pos
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:5219
AVCodecContext::b_sensitivity
attribute_deprecated int b_sensitivity
Definition: avcodec.h:2172
AVSubtitle::format
uint16_t format
Definition: avcodec.h:3935
AV_CODEC_ID_FIRST_AUDIO
@ AV_CODEC_ID_FIRST_AUDIO
A dummy id pointing at the start of audio codecs.
Definition: avcodec.h:463
AVDISCARD_NONINTRA
@ AVDISCARD_NONINTRA
discard all non intra frames
Definition: avcodec.h:810
log.h
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: avcodec.h:216
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1471
RcOverride::end_frame
int end_frame
Definition: avcodec.h:833
AVCodecContext::properties
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:3228
AV_CODEC_ID_MTS2
@ AV_CODEC_ID_MTS2
Definition: avcodec.h:383
AV_CODEC_ID_PJS
@ AV_CODEC_ID_PJS
Definition: avcodec.h:681
avcodec_register
attribute_deprecated void avcodec_register(AVCodec *codec)
Register the codec codec and initialize libavcodec.
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1667
AVSubtitleRect::nb_colors
int nb_colors
number of colors in pict, undefined when pict is not set
Definition: avcodec.h:3904
AVHWAccel::decode_slice
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3740
AV_CODEC_ID_AVS
@ AV_CODEC_ID_AVS
Definition: avcodec.h:300
AV_CODEC_ID_ASV2
@ AV_CODEC_ID_ASV2
Definition: avcodec.h:250
av_codec_next
attribute_deprecated AVCodec * av_codec_next(const AVCodec *c)
If c is NULL, returns the first registered codec, if c is non-NULL, returns the next registered codec...
AV_CODEC_ID_THEORA
@ AV_CODEC_ID_THEORA
Definition: avcodec.h:248
AVCodecContext::rtp_callback
attribute_deprecated void(* rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
Definition: avcodec.h:2542
avcodec_descriptor_get
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
AV_CODEC_ID_EVRC
@ AV_CODEC_ID_EVRC
Definition: avcodec.h:637
AVCodecParameters::height
int height
Definition: avcodec.h:4025
avcodec_parameters_to_context
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
AV_CODEC_ID_FRWU
@ AV_CODEC_ID_FRWU
Definition: avcodec.h:348
AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED
@ AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED
Definition: avcodec.h:819
AV_CODEC_ID_SUBRIP
@ AV_CODEC_ID_SUBRIP
Definition: avcodec.h:677
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4075
AV_CODEC_ID_TTML
@ AV_CODEC_ID_TTML
Definition: avcodec.h:684
AV_CODEC_ID_SAMI
@ AV_CODEC_ID_SAMI
Definition: avcodec.h:672
av_codec_get_lowres
attribute_deprecated int av_codec_get_lowres(const AVCodecContext *avctx)
AVCodecContext::intra_dc_precision
int intra_dc_precision
precision of the intra DC coefficient - 8
Definition: avcodec.h:2092
avcodec_decode_video2
attribute_deprecated int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt->size from avpkt->data into picture.
AV_CODEC_ID_CAVS
@ AV_CODEC_ID_CAVS
Definition: avcodec.h:305
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:496
AV_AUDIO_SERVICE_TYPE_EFFECTS
@ AV_AUDIO_SERVICE_TYPE_EFFECTS
Definition: avcodec.h:817
AVCodecContext::cutoff
int cutoff
Audio cutoff bandwidth (0 means "automatic")
Definition: avcodec.h:2270
AVCodecContext::frame_skip_cmp
attribute_deprecated int frame_skip_cmp
Definition: avcodec.h:2507
AVCodecContext::hwaccel_flags
int hwaccel_flags
Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated decoding (if active).
Definition: avcodec.h:3324
AV_CODEC_ID_DSD_LSBF_PLANAR
@ AV_CODEC_ID_DSD_LSBF_PLANAR
Definition: avcodec.h:641
AVCodecParserContext::cur_offset
int64_t cur_offset
Definition: avcodec.h:5113
AV_CODEC_ID_FIRST_SUBTITLE
@ AV_CODEC_ID_FIRST_SUBTITLE
A dummy ID pointing at the start of subtitle codecs.
Definition: avcodec.h:658
AV_CODEC_ID_BMV_AUDIO
@ AV_CODEC_ID_BMV_AUDIO
Definition: avcodec.h:621
AV_PKT_DATA_A53_CC
@ AV_PKT_DATA_A53_CC
ATSC A53 Part 4 Closed Captions.
Definition: avcodec.h:1387
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
AV_CODEC_ID_PAF_VIDEO
@ AV_CODEC_ID_PAF_VIDEO
Definition: avcodec.h:397
AV_CODEC_ID_FIC
@ AV_CODEC_ID_FIC
Definition: avcodec.h:394
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: avcodec.h:486
av_fast_padded_malloc
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
AVCodecParser::parser_init
int(* parser_init)(AVCodecParserContext *s)
Definition: avcodec.h:5279
AVCodecContext::pts_correction_last_dts
int64_t pts_correction_last_dts
PTS of the last frame.
Definition: avcodec.h:3146
AV_CODEC_ID_RV20
@ AV_CODEC_ID_RV20
Definition: avcodec.h:224
AV_CODEC_ID_HEVC
@ AV_CODEC_ID_HEVC
Definition: avcodec.h:392
AVCodecContext::dia_size
int dia_size
ME diamond size & shape.
Definition: avcodec.h:1994
AV_CODEC_ID_KGV1
@ AV_CODEC_ID_KGV1
Definition: avcodec.h:356
AVCodecContext::dump_separator
uint8_t * dump_separator
dump format separator.
Definition: avcodec.h:3213
AVCodecContext::header_bits
attribute_deprecated int header_bits
Definition: avcodec.h:2561
AV_CODEC_ID_A64_MULTI5
@ AV_CODEC_ID_A64_MULTI5
Definition: avcodec.h:362
AV_CODEC_ID_HNM4_VIDEO
@ AV_CODEC_ID_HNM4_VIDEO
Definition: avcodec.h:391
AV_CODEC_ID_DVVIDEO
@ AV_CODEC_ID_DVVIDEO
Definition: avcodec.h:242
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: avcodec.h:473
AVBitStreamFilter::filter
int(* filter)(AVBSFContext *ctx, AVPacket *pkt)
Definition: avcodec.h:5844
AV_CODEC_ID_CMV
@ AV_CODEC_ID_CMV
Definition: avcodec.h:336
AV_CODEC_ID_CLLC
@ AV_CODEC_ID_CLLC
Definition: avcodec.h:384
AV_CODEC_ID_DSS_SP
@ AV_CODEC_ID_DSS_SP
Definition: avcodec.h:631
AVCodecContext::mb_lmin
int mb_lmin
minimum MB Lagrange multiplier
Definition: avcodec.h:2113
AV_CODEC_ID_C93
@ AV_CODEC_ID_C93
Definition: avcodec.h:320
av_get_audio_frame_duration
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
AVSubtitleRect::pict
attribute_deprecated AVPicture pict
Definition: avcodec.h:3911
AVCodecContext::idct_algo
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2769
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3489
AVCodecContext::hw_device_ctx
AVBufferRef * hw_device_ctx
A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/d...
Definition: avcodec.h:3315
AV_CODEC_ID_VC1
@ AV_CODEC_ID_VC1
Definition: avcodec.h:288
AV_PKT_DATA_CPB_PROPERTIES
@ AV_PKT_DATA_CPB_PROPERTIES
This side data corresponds to the AVCPBProperties struct.
Definition: avcodec.h:1290
AV_PKT_DATA_SKIP_SAMPLES
@ AV_PKT_DATA_SKIP_SAMPLES
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1301
AVCodecContext::chroma_sample_location
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2208
AVCodecParameters::color_range
enum AVColorRange color_range
Video only.
Definition: avcodec.h:4044
AV_CODEC_ID_WEBP
@ AV_CODEC_ID_WEBP
Definition: avcodec.h:390
AV_CODEC_ID_PCM_F16LE
@ AV_CODEC_ID_PCM_F16LE
Definition: avcodec.h:498
AVCodec::decode
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3580
AV_CODEC_ID_VIXL
@ AV_CODEC_ID_VIXL
Definition: avcodec.h:277
AV_CODEC_ID_ADPCM_IMA_DAT4
@ AV_CODEC_ID_ADPCM_IMA_DAT4
Definition: avcodec.h:543
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: avcodec.h:306
av_register_hwaccel
attribute_deprecated void av_register_hwaccel(AVHWAccel *hwaccel)
Register the hardware accelerator hwaccel.
AV_CODEC_ID_METASOUND
@ AV_CODEC_ID_METASOUND
Definition: avcodec.h:628
AV_CODEC_ID_BETHSOFTVID
@ AV_CODEC_ID_BETHSOFTVID
Definition: avcodec.h:321
AVCPBProperties::min_bitrate
int min_bitrate
Minimum bitrate of the stream, in bits per second.
Definition: avcodec.h:1144
AVBSFContext::time_base_out
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5810
AVCodecContext::height
int height
Definition: avcodec.h:1739
AV_CODEC_ID_ULTI
@ AV_CODEC_ID_ULTI
Definition: avcodec.h:275
AV_CODEC_ID_XBM
@ AV_CODEC_ID_XBM
Definition: avcodec.h:378
avcodec_send_frame
int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
Supply a raw video or audio frame to the encoder.
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1776
AVBitStreamFilterContext::parser
AVCodecParserContext * parser
Definition: avcodec.h:5742
AV_CODEC_ID_MVC1
@ AV_CODEC_ID_MVC1
Definition: avcodec.h:402
AVCodec::priv_data_size
int priv_data_size
Definition: avcodec.h:3530
av_bitstream_filter_close
attribute_deprecated void av_bitstream_filter_close(AVBitStreamFilterContext *bsf)
av_codec_iterate
const AVCodec * av_codec_iterate(void **opaque)
Iterate over all registered codecs.
AV_CODEC_ID_VPLAYER
@ AV_CODEC_ID_VPLAYER
Definition: avcodec.h:680
AVCodecParameters::field_order
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4039
av_get_exact_bits_per_sample
int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
AVCodecContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.
Definition: avcodec.h:3263
AV_CODEC_ID_XSUB
@ AV_CODEC_ID_XSUB
Definition: avcodec.h:662
AV_CODEC_ID_IAC
@ AV_CODEC_ID_IAC
Definition: avcodec.h:623
AV_CODEC_ID_ADPCM_EA
@ AV_CODEC_ID_ADPCM_EA
Definition: avcodec.h:513
AVCodecParserContext
Definition: avcodec.h:5109
avcodec_get_chroma_sub_sample
attribute_deprecated void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
AVCodecContext::sub_charenc_mode
int sub_charenc_mode
Subtitles character encoding mode.
Definition: avcodec.h:3161
AVBSFContext::priv_data
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5785
AV_CODEC_ID_GSM_MS
@ AV_CODEC_ID_GSM_MS
Definition: avcodec.h:595
AV_CODEC_ID_SMACKVIDEO
@ AV_CODEC_ID_SMACKVIDEO
Definition: avcodec.h:301
AVHWAccel::decode_mb
void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
Definition: avcodec.h:3771
avcodec_get_hw_frames_parameters
int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, AVBufferRef *device_ref, enum AVPixelFormat hw_pix_fmt, AVBufferRef **out_frames_ref)
Create and return a AVHWFramesContext with values adequate for hardware decoding.
AV_CODEC_ID_BMV_VIDEO
@ AV_CODEC_ID_BMV_VIDEO
Definition: avcodec.h:372
AVCodec::caps_internal
int caps_internal
Internal codec capabilities.
Definition: avcodec.h:3608
AVSubtitleRect::h
int h
height of pict, undefined when pict is not set
Definition: avcodec.h:3903
AVCodecContext::block_align
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
Definition: avcodec.h:2263
pixfmt.h
avcodec_flush_buffers
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
AVCodec::hw_configs
const struct AVCodecHWConfigInternal ** hw_configs
Array of pointers to hardware configurations supported by the codec, or NULL if no hardware supported...
Definition: avcodec.h:3623
AVCodecParserContext::coded_height
int coded_height
Definition: avcodec.h:5263
AVCPBProperties::buffer_size
int buffer_size
The size of the buffer to which the ratecontrol is applied, in bits.
Definition: avcodec.h:1162
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2629
avpicture_layout
attribute_deprecated int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
AV_CODEC_ID_AVRP
@ AV_CODEC_ID_AVRP
Definition: avcodec.h:416
AV_CODEC_ID_AIC
@ AV_CODEC_ID_AIC
Definition: avcodec.h:387
AV_CODEC_ID_CSCD
@ AV_CODEC_ID_CSCD
Definition: avcodec.h:297
AVCodecContext::opaque
void * opaque
Private data of the user, can be used to carry app specific stuff.
Definition: avcodec.h:1608
AV_CODEC_ID_WESTWOOD_SND1
@ AV_CODEC_ID_WESTWOOD_SND1
Definition: avcodec.h:582
AVCodecParser::priv_data_size
int priv_data_size
Definition: avcodec.h:5278
dict.h
AVPacket::side_data
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1489
AV_CODEC_ID_TEXT
@ AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: avcodec.h:661
AV_CODEC_ID_JV
@ AV_CODEC_ID_JV
Definition: avcodec.h:367
AVCodecContext::refcounted_frames
attribute_deprecated int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:2397
AV_CODEC_ID_MUSEPACK8
@ AV_CODEC_ID_MUSEPACK8
Definition: avcodec.h:599
AV_CODEC_ID_AGM
@ AV_CODEC_ID_AGM
Definition: avcodec.h:458
AVCodecContext::draw_horiz_band
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.
Definition: avcodec.h:1801
AVCodecParameters::chroma_location
enum AVChromaLocation chroma_location
Definition: avcodec.h:4048
AVCodecContext::scenechange_threshold
attribute_deprecated int scenechange_threshold
Definition: avcodec.h:2080
AV_AUDIO_SERVICE_TYPE_COMMENTARY
@ AV_AUDIO_SERVICE_TYPE_COMMENTARY
Definition: avcodec.h:821
AVCodecParameters::trailing_padding
int trailing_padding
Audio only.
Definition: avcodec.h:4094
AV_CODEC_ID_AMV
@ AV_CODEC_ID_AMV
Definition: avcodec.h:325
av_codec_get_seek_preroll
attribute_deprecated int av_codec_get_seek_preroll(const AVCodecContext *avctx)
AV_CODEC_ID_PROSUMER
@ AV_CODEC_ID_PROSUMER
Definition: avcodec.h:452
AVCodecContext::max_qdiff
int max_qdiff
maximum quantizer difference between frames
Definition: avcodec.h:2422
avcodec_find_decoder_by_name
AVCodec * avcodec_find_decoder_by_name(const char *name)
Find a registered decoder with the specified name.
AV_CODEC_ID_ESCAPE124
@ AV_CODEC_ID_ESCAPE124
Definition: avcodec.h:333
AVCodecContext::dark_masking
float dark_masking
darkness masking (0-> disabled)
Definition: avcodec.h:1913
AVCodecContext::coded_frame
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2816
AVCodecContext
main external API structure.
Definition: avcodec.h:1566
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2844
AV_CODEC_ID_SNOW
@ AV_CODEC_ID_SNOW
Definition: avcodec.h:427
AV_CODEC_ID_HAP
@ AV_CODEC_ID_HAP
Definition: avcodec.h:407
AVCodecContext::codec_descriptor
const AVCodecDescriptor * codec_descriptor
AVCodecDescriptor.
Definition: avcodec.h:3127
AV_CODEC_ID_H263P
@ AV_CODEC_ID_H263P
Definition: avcodec.h:237
AVCodecParserContext::field_order
enum AVFieldOrder field_order
Definition: avcodec.h:5233
AV_CODEC_ID_ADPCM_AGM
@ AV_CODEC_ID_ADPCM_AGM
Definition: avcodec.h:545
AVCodecContext::execute
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2865
AV_CODEC_ID_G729
@ AV_CODEC_ID_G729
Definition: avcodec.h:618
AV_CODEC_ID_ADPCM_G726LE
@ AV_CODEC_ID_ADPCM_G726LE
Definition: avcodec.h:539
channel_layout.h
av_bsf_init
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT
@ AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT
Definition: avcodec.h:1533
av_copy_packet
attribute_deprecated int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
AV_CODEC_ID_V410
@ AV_CODEC_ID_V410
Definition: avcodec.h:375
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AV_CODEC_ID_BINKVIDEO
@ AV_CODEC_ID_BINKVIDEO
Definition: avcodec.h:353
AVBitStreamFilter
Definition: avcodec.h:5813
AVCodecContext::qmin
int qmin
minimum quantizer
Definition: avcodec.h:2408
AV_PKT_DATA_NEW_EXTRADATA
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1200
av_get_pcm_codec
enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
Return the PCM codec associated with a sample format.
AV_CODEC_ID_JPEGLS
@ AV_CODEC_ID_JPEGLS
Definition: avcodec.h:229
AVHWAccel::frame_priv_data_size
int frame_priv_data_size
Size of per-frame hardware accelerator private data.
Definition: avcodec.h:3760
AVCodecContext::bidir_refine
int bidir_refine
Definition: avcodec.h:2134
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:2899
av_fast_padded_mallocz
void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_padded_malloc except that buffer will always be 0-initialized after call.
AV_CODEC_ID_DVAUDIO
@ AV_CODEC_ID_DVAUDIO
Definition: avcodec.h:571
AV_CODEC_ID_PSD
@ AV_CODEC_ID_PSD
Definition: avcodec.h:437
av_packet_make_writable
int av_packet_make_writable(AVPacket *pkt)
Create a writable reference for the data described by a given packet, avoiding data copy if possible.
AVDictionary
struct AVDictionary AVDictionary
Definition: dict.h:86
AV_CODEC_ID_BFI
@ AV_CODEC_ID_BFI
Definition: avcodec.h:335
AVCodecContext::spatial_cplx_masking
float spatial_cplx_masking
spatial complexity masking (0-> disabled)
Definition: avcodec.h:1899
AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX
@ AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX
The codec supports this format via the hw_device_ctx interface.
Definition: avcodec.h:3428
AVBitStreamFilterContext::priv_data
void * priv_data
Definition: avcodec.h:5740
AV_CODEC_ID_ADPCM_EA_R1
@ AV_CODEC_ID_ADPCM_EA_R1
Definition: avcodec.h:523
AVCodecContext::i_quant_offset
float i_quant_offset
qscale offset between P and I-frames
Definition: avcodec.h:1878
AVCodecContext::discard_damaged_percentage
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
Definition: avcodec.h:3373
AV_CODEC_ID_PCM_U32LE
@ AV_CODEC_ID_PCM_U32LE
Definition: avcodec.h:474
av_bsf_receive_packet
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
AV_CODEC_ID_ADPCM_EA_R2
@ AV_CODEC_ID_ADPCM_EA_R2
Definition: avcodec.h:525
AVCodecContext::mb_lmax
int mb_lmax
maximum MB Lagrange multiplier
Definition: avcodec.h:2120
av_get_audio_frame_duration2
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
AV_CODEC_ID_PROBE
@ AV_CODEC_ID_PROBE
codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
Definition: avcodec.h:702
avcodec_chroma_pos_to_enum
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
Converts swscale x/y chroma position to AVChromaLocation.
AV_CODEC_ID_MSA1
@ AV_CODEC_ID_MSA1
Definition: avcodec.h:381
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1480
avcodec_get_hw_config
const AVCodecHWConfig * avcodec_get_hw_config(const AVCodec *codec, int index)
Retrieve supported hardware configurations for a codec.
AVCodecContext::pre_dia_size
int pre_dia_size
ME prepass diamond size & shape.
Definition: avcodec.h:2021
AVBitStreamFilterContext::args
char * args
Internal default arguments, used if NULL is passed to av_bitstream_filter_filter().
Definition: avcodec.h:5748
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:2651
AV_CODEC_ID_VMNC
@ AV_CODEC_ID_VMNC
Definition: avcodec.h:307
AV_CODEC_ID_TRUESPEECH
@ AV_CODEC_ID_TRUESPEECH
Definition: avcodec.h:586
AVHWAccel::start_frame
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3712
AVBSFContext::filter
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5773
AVCodec::close
int(* close)(AVCodecContext *)
Definition: avcodec.h:3581
AV_CODEC_ID_XBIN
@ AV_CODEC_ID_XBIN
Definition: avcodec.h:693
AV_CODEC_ID_ADPCM_THP
@ AV_CODEC_ID_ADPCM_THP
Definition: avcodec.h:521
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1754
AV_CODEC_ID_MICRODVD
@ AV_CODEC_ID_MICRODVD
Definition: avcodec.h:669
AVCodecContext::codec_type
enum AVMediaType codec_type
Definition: avcodec.h:1574
AVCodecContext::seek_preroll
int seek_preroll
Number of samples to skip after a discontinuity.
Definition: avcodec.h:3186
av_parser_parse2
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
AV_CODEC_ID_DDS
@ AV_CODEC_ID_DDS
Definition: avcodec.h:408
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: avcodec.h:472
avutil.h
AV_CODEC_ID_SONIC
@ AV_CODEC_ID_SONIC
Definition: avcodec.h:635
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4000
AVCodecContext::max_b_frames
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1826
AV_CODEC_ID_QTRLE
@ AV_CODEC_ID_QTRLE
Definition: avcodec.h:273
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:81
AV_CODEC_ID_ADPCM_SBPRO_4
@ AV_CODEC_ID_ADPCM_SBPRO_4
Definition: avcodec.h:518
AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
@ AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1336
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: avcodec.h:469
AV_CODEC_ID_RPZA
@ AV_CODEC_ID_RPZA
Definition: avcodec.h:260
AVCodec::receive_frame
int(* receive_frame)(AVCodecContext *avctx, AVFrame *frame)
Decode API with decoupled packet/frame dataflow.
Definition: avcodec.h:3598
AV_CODEC_ID_SDX2_DPCM
@ AV_CODEC_ID_SDX2_DPCM
Definition: avcodec.h:561
AVCodecParameters::video_delay
int video_delay
Video only.
Definition: avcodec.h:4053
AVCodecContext::frame_number
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2257
AV_CODEC_ID_VBLE
@ AV_CODEC_ID_VBLE
Definition: avcodec.h:373
AVCodecContext::rc_max_available_vbv_use
float rc_max_available_vbv_use
Ratecontrol attempt to use, at maximum, of what can be used without an underflow.
Definition: avcodec.h:2458
AVCodecParameters::format
int format
Definition: avcodec.h:3982
AV_CODEC_ID_PCM_S24DAUD
@ AV_CODEC_ID_PCM_S24DAUD
Definition: avcodec.h:480
AV_CODEC_ID_XMA2
@ AV_CODEC_ID_XMA2
Definition: avcodec.h:646
AV_CODEC_ID_G2M
@ AV_CODEC_ID_G2M
Definition: avcodec.h:389
AV_CODEC_ID_TSCC
@ AV_CODEC_ID_TSCC
Definition: avcodec.h:274
AVCodecContext::chromaoffset
attribute_deprecated int chromaoffset
Definition: avcodec.h:2159
AV_AUDIO_SERVICE_TYPE_DIALOGUE
@ AV_AUDIO_SERVICE_TYPE_DIALOGUE
Definition: avcodec.h:820
AV_CODEC_ID_PCM_F64LE
@ AV_CODEC_ID_PCM_F64LE
Definition: avcodec.h:487
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1591
av_parser_change
int av_parser_change(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
AV_PARSER_PTS_NB
#define AV_PARSER_PTS_NB
Definition: avcodec.h:5136
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3958
AVCodecContext::slices
int slices
Number of slices.
Definition: avcodec.h:2217
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1593
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1455
AVCodec::flush
void(* flush)(AVCodecContext *)
Flush buffers.
Definition: avcodec.h:3603
AV_CODEC_ID_ADPCM_IMA_WAV
@ AV_CODEC_ID_ADPCM_IMA_WAV
Definition: avcodec.h:504
AVCodecParserContext::last_pos
int64_t last_pos
Previous frame byte position.
Definition: avcodec.h:5224
AVCodec::next
struct AVCodec * next
Definition: avcodec.h:3531
AV_CODEC_ID_SGIRLE
@ AV_CODEC_ID_SGIRLE
Definition: avcodec.h:401
AVCodecContext::inter_matrix
uint16_t * inter_matrix
custom inter quantization matrix Must be allocated with the av_malloc() family of functions,...
Definition: avcodec.h:2075
avpicture_fill
attribute_deprecated int avpicture_fill(AVPicture *picture, const uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
AVHWAccel::frame_params
int(* frame_params)(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Fill the given hw_frames context with current codec parameters.
Definition: avcodec.h:3809
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1498
AVCodecParser
Definition: avcodec.h:5276
AV_FIELD_TB
@ AV_FIELD_TB
Definition: avcodec.h:1549
AV_CODEC_ID_TAK
@ AV_CODEC_ID_TAK
Definition: avcodec.h:627
AVCodecContext::rc_override_count
int rc_override_count
ratecontrol override, see RcOverride
Definition: avcodec.h:2436
av_copy_packet_side_data
attribute_deprecated int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src)
Copy packet side data.
AV_PKT_DATA_FALLBACK_TRACK
@ AV_PKT_DATA_FALLBACK_TRACK
This side data contains an integer value representing the stream index of a "fallback" track.
Definition: avcodec.h:1285
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4060
AVCodecContext::reordered_opaque
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame....
Definition: avcodec.h:2723
avcodec_configuration
const char * avcodec_configuration(void)
Return the libavcodec build-time configuration.
AVBitStreamFilter::init
int(* init)(AVBSFContext *ctx)
Definition: avcodec.h:5843
AVPicture::linesize
attribute_deprecated int linesize[AV_NUM_DATA_POINTERS]
number of bytes per line
Definition: avcodec.h:3871
AV_CODEC_ID_ILBC
@ AV_CODEC_ID_ILBC
Definition: avcodec.h:624
AV_FIELD_BB
@ AV_FIELD_BB
Definition: avcodec.h:1548
AV_CODEC_ID_PCM_S8_PLANAR
@ AV_CODEC_ID_PCM_S8_PLANAR
Definition: avcodec.h:491
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1739
AVCodecDescriptor::id
enum AVCodecID id
Definition: avcodec.h:718
AVCodecContext::me_penalty_compensation
attribute_deprecated int me_penalty_compensation
Definition: avcodec.h:2127
AVCodecContext::min_prediction_order
attribute_deprecated int min_prediction_order
Definition: avcodec.h:2520
AV_CODEC_ID_PCM_U16LE
@ AV_CODEC_ID_PCM_U16LE
Definition: avcodec.h:466
AV_CODEC_ID_012V
@ AV_CODEC_ID_012V
Definition: avcodec.h:417
AV_PKT_DATA_QUALITY_STATS
@ AV_PKT_DATA_QUALITY_STATS
This side data contains quality related information from the encoder.
Definition: avcodec.h:1277
AV_CODEC_ID_VP8
@ AV_CODEC_ID_VP8
Definition: avcodec.h:358
hwcontext.h
AV_CODEC_ID_PCM_F32LE
@ AV_CODEC_ID_PCM_F32LE
Definition: avcodec.h:485
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3987
AV_CODEC_ID_BRENDER_PIX
@ AV_CODEC_ID_BRENDER_PIX
Definition: avcodec.h:396
AV_CODEC_ID_AAC_LATM
@ AV_CODEC_ID_AAC_LATM
Definition: avcodec.h:614
AV_CODEC_ID_WAVPACK
@ AV_CODEC_ID_WAVPACK
Definition: avcodec.h:590
av_bsf_list_append2
int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary **options)
Construct new bitstream filter context given it's name and options and append it to the list of bitst...
AV_CODEC_ID_COOK
@ AV_CODEC_ID_COOK
Definition: avcodec.h:585
AV_CODEC_ID_4GV
@ AV_CODEC_ID_4GV
Definition: avcodec.h:643
AV_CODEC_ID_MSMPEG4V3
@ AV_CODEC_ID_MSMPEG4V3
Definition: avcodec.h:234
AVCodecParserContext::priv_data
void * priv_data
Definition: avcodec.h:5110
AVPanScan::height
int height
Definition: avcodec.h:1114
AV_CODEC_ID_SGI
@ AV_CODEC_ID_SGI
Definition: avcodec.h:319
AV_CODEC_ID_HDMV_TEXT_SUBTITLE
@ AV_CODEC_ID_HDMV_TEXT_SUBTITLE
Definition: avcodec.h:683
AV_CODEC_ID_SUNRAST
@ AV_CODEC_ID_SUNRAST
Definition: avcodec.h:328
AVCodecHWConfig
Definition: avcodec.h:3456
AV_CODEC_ID_ADPCM_4XM
@ AV_CODEC_ID_ADPCM_4XM
Definition: avcodec.h:510
AV_CODEC_ID_CLEARVIDEO
@ AV_CODEC_ID_CLEARVIDEO
Definition: avcodec.h:442
AVBitStreamFilterContext
Definition: avcodec.h:5739
AV_CODEC_ID_TARGA
@ AV_CODEC_ID_TARGA
Definition: avcodec.h:311
AV_PKT_DATA_WEBVTT_IDENTIFIER
@ AV_PKT_DATA_WEBVTT_IDENTIFIER
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1341
AV_CODEC_ID_VORBIS
@ AV_CODEC_ID_VORBIS
Definition: avcodec.h:570
AV_CODEC_ID_TIFF
@ AV_CODEC_ID_TIFF
Definition: avcodec.h:314
AVCodecContext::sw_pix_fmt
enum AVPixelFormat sw_pix_fmt
Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:3113
AV_CODEC_ID_WMV3IMAGE
@ AV_CODEC_ID_WMV3IMAGE
Definition: avcodec.h:369
AVCodecParserContext::cur_frame_dts
int64_t cur_frame_dts[AV_PARSER_PTS_NB]
Definition: avcodec.h:5140
AV_CODEC_ID_APTX
@ AV_CODEC_ID_APTX
Definition: avcodec.h:651
AVBitStreamFilter::flush
void(* flush)(AVBSFContext *ctx)
Definition: avcodec.h:5846
AV_CODEC_ID_DXTORY
@ AV_CODEC_ID_DXTORY
Definition: avcodec.h:374
AV_CODEC_ID_MSVIDEO1
@ AV_CODEC_ID_MSVIDEO1
Definition: avcodec.h:264
AV_CODEC_ID_M101
@ AV_CODEC_ID_M101
Definition: avcodec.h:433
AV_CODEC_ID_REALTEXT
@ AV_CODEC_ID_REALTEXT
Definition: avcodec.h:673
AV_CODEC_ID_MUSEPACK7
@ AV_CODEC_ID_MUSEPACK7
Definition: avcodec.h:593
AV_CODEC_ID_ADPCM_PSX
@ AV_CODEC_ID_ADPCM_PSX
Definition: avcodec.h:541
AV_CODEC_ID_FLV1
@ AV_CODEC_ID_FLV1
Definition: avcodec.h:239
AVCodecContext::codec_whitelist
char * codec_whitelist
',' separated list of allowed decoders.
Definition: avcodec.h:3221
AVDiscard
AVDiscard
Definition: avcodec.h:803
AVDISCARD_NONREF
@ AVDISCARD_NONREF
discard all non reference
Definition: avcodec.h:808
AV_CODEC_ID_BINKAUDIO_RDFT
@ AV_CODEC_ID_BINKAUDIO_RDFT
Definition: avcodec.h:612
AV_CODEC_ID_DFA
@ AV_CODEC_ID_DFA
Definition: avcodec.h:368
AVColorRange
AVColorRange
MPEG vs JPEG YUV range.
Definition: pixfmt.h:519
AVCodecParserContext::last_dts
int64_t last_dts
Definition: avcodec.h:5133
AV_CODEC_ID_SHORTEN
@ AV_CODEC_ID_SHORTEN
Definition: avcodec.h:580
AV_FIELD_BT
@ AV_FIELD_BT
Definition: avcodec.h:1550
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
AVCodecContext::frame_skip_factor
attribute_deprecated int frame_skip_factor
Definition: avcodec.h:2499
AV_CODEC_ID_LJPEG
@ AV_CODEC_ID_LJPEG
Definition: avcodec.h:227
AV_CODEC_ID_TWINVQ
@ AV_CODEC_ID_TWINVQ
Definition: avcodec.h:608
AV_CODEC_ID_MP1
@ AV_CODEC_ID_MP1
Definition: avcodec.h:607
AVCodecParameters::initial_padding
int initial_padding
Audio only.
Definition: avcodec.h:4087
AVCodecContext::execute2
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2885
AV_CODEC_ID_CELT
@ AV_CODEC_ID_CELT
Definition: avcodec.h:616
AV_CODEC_ID_GREMLIN_DPCM
@ AV_CODEC_ID_GREMLIN_DPCM
Definition: avcodec.h:562
AV_CODEC_ID_AASC
@ AV_CODEC_ID_AASC
Definition: avcodec.h:292
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: avcodec.h:477
AV_CODEC_ID_TMV
@ AV_CODEC_ID_TMV
Definition: avcodec.h:344
AV_CODEC_ID_CDXL
@ AV_CODEC_ID_CDXL
Definition: avcodec.h:377
AVCodecHWConfig::device_type
enum AVHWDeviceType device_type
The device type associated with the configuration.
Definition: avcodec.h:3472
AVHWAccel::pix_fmt
enum AVPixelFormat pix_fmt
Supported pixel format.
Definition: avcodec.h:3677
AVCodecContext::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
Definition: avcodec.h:1945
AVCodec::channel_layouts
const uint64_t * channel_layouts
array of support channel layouts, or NULL if unknown. array is terminated by 0
Definition: avcodec.h:3506
AVSubtitle::start_display_time
uint32_t start_display_time
Definition: avcodec.h:3936
AV_CODEC_ID_APTX_HD
@ AV_CODEC_ID_APTX_HD
Definition: avcodec.h:652
AV_CODEC_ID_DNXHD
@ AV_CODEC_ID_DNXHD
Definition: avcodec.h:317
avcodec_descriptor_get_by_name
const AVCodecDescriptor * avcodec_descriptor_get_by_name(const char *name)
AV_CODEC_ID_PAF_AUDIO
@ AV_CODEC_ID_PAF_AUDIO
Definition: avcodec.h:629
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
AV_CODEC_ID_MLP
@ AV_CODEC_ID_MLP
Definition: avcodec.h:594
AV_CODEC_ID_NELLYMOSER
@ AV_CODEC_ID_NELLYMOSER
Definition: avcodec.h:598
AVPacket::side_data_elems
int side_data_elems
Definition: avcodec.h:1490
AV_CODEC_ID_PTX
@ AV_CODEC_ID_PTX
Definition: avcodec.h:322
AVCodecContext::compression_level
int compression_level
Definition: avcodec.h:1638
AVBSFList
struct AVBSFList AVBSFList
Structure for chain/list of bitstream filters.
Definition: avcodec.h:5996
av_parser_close
void av_parser_close(AVCodecParserContext *s)
AV_CODEC_ID_AURA
@ AV_CODEC_ID_AURA
Definition: avcodec.h:341
AV_CODEC_ID_PRORES
@ AV_CODEC_ID_PRORES
Definition: avcodec.h:366
av_packet_clone
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
av_bitstream_filter_init
attribute_deprecated AVBitStreamFilterContext * av_bitstream_filter_init(const char *name)
av_init_packet
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
AV_CODEC_ID_ADPCM_SBPRO_3
@ AV_CODEC_ID_ADPCM_SBPRO_3
Definition: avcodec.h:519
AV_CODEC_ID_DAALA
@ AV_CODEC_ID_DAALA
Definition: avcodec.h:430
AV_CODEC_ID_SCTE_35
@ AV_CODEC_ID_SCTE_35
Contain timestamp estimated through PCR of program stream.
Definition: avcodec.h:691
AVHWAccel::id
enum AVCodecID id
Codec implemented by the hardware accelerator.
Definition: avcodec.h:3670
AVCodecContext::side_data_only_packets
attribute_deprecated int side_data_only_packets
Encoding only and set by default.
Definition: avcodec.h:3079