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NE10_iir_init.c
/*
* Copyright 2012-15 ARM Limited and Contributors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of ARM Limited nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LIMITED AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ARM LIMITED AND CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* NE10 Library : dsp/NE10_iir_init.c
*/
#include "NE10_types.h"
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)
{
/* Assign filter taps */
S->numStages = numStages;
/* Assign reflection coefficient pointer */
S->pkCoeffs = pkCoeffs;
/* Assign ladder coefficient pointer */
S->pvCoeffs = pvCoeffs;
/* Clear state buffer and size is always blockSize + numStages */
memset (pState, 0, (numStages + blockSize) * sizeof (ne10_float32_t));
/* Assign state pointer */
S->pState = pState;
return NE10_OK;
}
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
Instance structure for the floating point IIR Lattice filter.
Definition NE10_types.h:420
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::pkCoeffs
ne10_float32_t * pkCoeffs
Points to the reflection coefficient array.
Definition NE10_types.h:423
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::pvCoeffs
ne10_float32_t * pvCoeffs
Points to the ladder coefficient array.
Definition NE10_types.h:424