Project Ne10
An Open Optimized Software Library Project for the ARM Architecture
NE10_iir_init.c
1 /*
2  * Copyright 2012-15 ARM Limited and Contributors.
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9  * * Redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
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14  * derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY ARM LIMITED AND CONTRIBUTORS "AS IS" AND
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25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 /*
29  * NE10 Library : dsp/NE10_iir_init.c
30  */
31 #include "NE10_types.h"
32 
33 
46  ne10_uint16_t numStages,
47  ne10_float32_t * pkCoeffs,
48  ne10_float32_t * pvCoeffs,
49  ne10_float32_t * pState,
50  ne10_uint32_t blockSize)
51 {
52  /* Assign filter taps */
53  S->numStages = numStages;
54 
55  /* Assign reflection coefficient pointer */
56  S->pkCoeffs = pkCoeffs;
57 
58  /* Assign ladder coefficient pointer */
59  S->pvCoeffs = pvCoeffs;
60 
61  /* Clear state buffer and size is always blockSize + numStages */
62  memset (pState, 0, (numStages + blockSize) * sizeof (ne10_float32_t));
63 
64  /* Assign state pointer */
65  S->pState = pState;
66 
67  return NE10_OK;
68 }
69 
ne10_iir_lattice_instance_f32_t::pkCoeffs
ne10_float32_t * pkCoeffs
Points to the reflection coefficient array.
Definition: NE10_types.h:423
ne10_iir_lattice_init_float
ne10_result_t ne10_iir_lattice_init_float(ne10_iir_lattice_instance_f32_t *S, ne10_uint16_t numStages, ne10_float32_t *pkCoeffs, ne10_float32_t *pvCoeffs, ne10_float32_t *pState, ne10_uint32_t blockSize)
Initialization function for the floating-point IIR lattice filter.
Definition: NE10_iir_init.c:45
ne10_iir_lattice_instance_f32_t::pState
ne10_float32_t * pState
Points to the state variable array.
Definition: NE10_types.h:422
ne10_iir_lattice_instance_f32_t::pvCoeffs
ne10_float32_t * pvCoeffs
Points to the ladder coefficient array.
Definition: NE10_types.h:424
ne10_iir_lattice_instance_f32_t::numStages
ne10_uint16_t numStages
numStages of the of lattice filter.
Definition: NE10_types.h:421
ne10_iir_lattice_instance_f32_t
Instance structure for the floating point IIR Lattice filter.
Definition: NE10_types.h:419