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/*
* Copyright (c) 2011 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_ScaleAndAddVectorsWithRound()
* WebRtcSpl_ReverseOrderMultArrayElements()
* WebRtcSpl_ElementwiseVectorMult()
* WebRtcSpl_AddVectorsAndShift()
* WebRtcSpl_AddAffineVectorToVector()
* WebRtcSpl_AffineTransformVector()
*
* The description header can be found in signal_processing_library.h
*
*/
#include "signal_processing_library.h"
void WebRtcSpl_ScaleAndAddVectorsWithRound(WebRtc_Word16 *vector1, WebRtc_Word16 scale1,
WebRtc_Word16 *vector2, WebRtc_Word16 scale2,
WebRtc_Word16 right_shifts, WebRtc_Word16 *out,
WebRtc_Word16 vector_length)
{
int i;
WebRtc_Word16 roundVal;
roundVal = 1 << right_shifts;
roundVal = roundVal >> 1;
for (i = 0; i < vector_length; i++)
{
out[i] = (WebRtc_Word16)((WEBRTC_SPL_MUL_16_16(vector1[i], scale1)
+ WEBRTC_SPL_MUL_16_16(vector2[i], scale2) + roundVal) >> right_shifts);
}
}
void WebRtcSpl_ReverseOrderMultArrayElements(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in,
G_CONST WebRtc_Word16 *win,
WebRtc_Word16 vector_length,
WebRtc_Word16 right_shifts)
{
int i;
WebRtc_Word16 *outptr = out;
G_CONST WebRtc_Word16 *inptr = in;
G_CONST WebRtc_Word16 *winptr = win;
for (i = 0; i < vector_length; i++)
{
(*outptr++) = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
*winptr--, right_shifts);
}
}
void WebRtcSpl_ElementwiseVectorMult(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in,
G_CONST WebRtc_Word16 *win, WebRtc_Word16 vector_length,
WebRtc_Word16 right_shifts)
{
int i;
WebRtc_Word16 *outptr = out;
G_CONST WebRtc_Word16 *inptr = in;
G_CONST WebRtc_Word16 *winptr = win;
for (i = 0; i < vector_length; i++)
{
(*outptr++) = (WebRtc_Word16)WEBRTC_SPL_MUL_16_16_RSFT(*inptr++,
*winptr++, right_shifts);
}
}
void WebRtcSpl_AddVectorsAndShift(WebRtc_Word16 *out, G_CONST WebRtc_Word16 *in1,
G_CONST WebRtc_Word16 *in2, WebRtc_Word16 vector_length,
WebRtc_Word16 right_shifts)
{
int i;
WebRtc_Word16 *outptr = out;
G_CONST WebRtc_Word16 *in1ptr = in1;
G_CONST WebRtc_Word16 *in2ptr = in2;
for (i = vector_length; i > 0; i--)
{
(*outptr++) = (WebRtc_Word16)(((*in1ptr++) + (*in2ptr++)) >> right_shifts);
}
}
void WebRtcSpl_AddAffineVectorToVector(WebRtc_Word16 *out, WebRtc_Word16 *in,
WebRtc_Word16 gain, WebRtc_Word32 add_constant,
WebRtc_Word16 right_shifts, int vector_length)
{
WebRtc_Word16 *inPtr;
WebRtc_Word16 *outPtr;
int i;
inPtr = in;
outPtr = out;
for (i = 0; i < vector_length; i++)
{
(*outPtr++) += (WebRtc_Word16)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
+ (WebRtc_Word32)add_constant) >> right_shifts);
}
}
void WebRtcSpl_AffineTransformVector(WebRtc_Word16 *out, WebRtc_Word16 *in,
WebRtc_Word16 gain, WebRtc_Word32 add_constant,
WebRtc_Word16 right_shifts, int vector_length)
{
WebRtc_Word16 *inPtr;
WebRtc_Word16 *outPtr;
int i;
inPtr = in;
outPtr = out;
for (i = 0; i < vector_length; i++)
{
(*outPtr++) = (WebRtc_Word16)((WEBRTC_SPL_MUL_16_16((*inPtr++), gain)
+ (WebRtc_Word32)add_constant) >> right_shifts);
}
}
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