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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*
* This file contains implementations of the iLBC specific functions
* WebRtcSpl_ReverseOrderMultArrayElements()
* WebRtcSpl_ElementwiseVectorMult()
* WebRtcSpl_AddVectorsAndShift()
* WebRtcSpl_AddAffineVectorToVector()
* WebRtcSpl_AffineTransformVector()
*
*/
#include "common_audio/signal_processing/include/signal_processing_library.h"
void WebRtcSpl_ReverseOrderMultArrayElements(int16_t *out, const int16_t *in,
const int16_t *win,
size_t vector_length,
int16_t right_shifts)
{
size_t i;
int16_t *outptr = out;
const int16_t *inptr = in;
const int16_t *winptr = win;
for (i = 0; i < vector_length; i++)
{
*outptr++ = (int16_t)((*inptr++ * *winptr--) >> right_shifts);
}
}
void WebRtcSpl_ElementwiseVectorMult(int16_t *out, const int16_t *in,
const int16_t *win, size_t vector_length,
int16_t right_shifts)
{
size_t i;
int16_t *outptr = out;
const int16_t *inptr = in;
const int16_t *winptr = win;
for (i = 0; i < vector_length; i++)
{
*outptr++ = (int16_t)((*inptr++ * *winptr++) >> right_shifts);
}
}
void WebRtcSpl_AddVectorsAndShift(int16_t *out, const int16_t *in1,
const int16_t *in2, size_t vector_length,
int16_t right_shifts)
{
size_t i;
int16_t *outptr = out;
const int16_t *in1ptr = in1;
const int16_t *in2ptr = in2;
for (i = vector_length; i > 0; i--)
{
(*outptr++) = (int16_t)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
}
}
void WebRtcSpl_AddAffineVectorToVector(int16_t *out, int16_t *in,
int16_t gain, int32_t add_constant,
int16_t right_shifts,
size_t vector_length)
{
size_t i;
for (i = 0; i < vector_length; i++)
{
out[i] += (int16_t)((in[i] * gain + add_constant) >> right_shifts);
}
}
void WebRtcSpl_AffineTransformVector(int16_t *out, int16_t *in,
int16_t gain, int32_t add_constant,
int16_t right_shifts, size_t vector_length)
{
size_t i;
for (i = 0; i < vector_length; i++)
{
out[i] = (int16_t)((in[i] * gain + add_constant) >> right_shifts);
}
}
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