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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 the implementation of functions
* WebRtcSpl_MaxAbsValueW16()
* WebRtcSpl_MaxAbsIndexW16()
* WebRtcSpl_MaxAbsValueW32()
* WebRtcSpl_MaxValueW16()
* WebRtcSpl_MaxIndexW16()
* WebRtcSpl_MaxValueW32()
* WebRtcSpl_MaxIndexW32()
* WebRtcSpl_MinValueW16()
* WebRtcSpl_MinIndexW16()
* WebRtcSpl_MinValueW32()
* WebRtcSpl_MinIndexW32()
*
* The description header can be found in signal_processing_library.h.
*
*/
#include "signal_processing_library.h"
// Maximum absolute value of word16 vector.
WebRtc_Word16 WebRtcSpl_MaxAbsValueW16(G_CONST WebRtc_Word16 *vector, WebRtc_Word16 length)
{
WebRtc_Word32 tempMax = 0;
WebRtc_Word32 absVal;
WebRtc_Word16 totMax;
int i;
G_CONST WebRtc_Word16 *tmpvector = vector;
#ifdef _ARM_OPT_
#pragma message("NOTE: _ARM_OPT_ optimizations are used")
WebRtc_Word16 len4 = (length >> 2) << 2;
for (i = 0; i < len4; i = i + 4)
{
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
}
for (i = len4; i < len; i++)
{
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
}
#else
for (i = 0; i < length; i++)
{
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
}
totMax = (WebRtc_Word16)WEBRTC_SPL_MIN(tempMax, WEBRTC_SPL_WORD16_MAX);
return totMax;
#endif
}
// Index of maximum absolute value in a word16 vector.
WebRtc_Word16 WebRtcSpl_MaxAbsIndexW16(G_CONST WebRtc_Word16* vector, WebRtc_Word16 length)
{
WebRtc_Word16 tempMax;
WebRtc_Word16 absTemp;
WebRtc_Word16 tempMaxIndex = 0;
WebRtc_Word16 i = 0;
G_CONST WebRtc_Word16 *tmpvector = vector;
tempMax = WEBRTC_SPL_ABS_W16(*tmpvector);
tmpvector++;
for (i = 1; i < length; i++)
{
absTemp = WEBRTC_SPL_ABS_W16(*tmpvector);
tmpvector++;
if (absTemp > tempMax)
{
tempMax = absTemp;
tempMaxIndex = i;
}
}
return tempMaxIndex;
}
// Maximum absolute value of word32 vector.
WebRtc_Word32 WebRtcSpl_MaxAbsValueW32(G_CONST WebRtc_Word32 *vector, WebRtc_Word16 length)
{
WebRtc_UWord32 tempMax = 0;
WebRtc_UWord32 absVal;
WebRtc_Word32 retval;
int i;
G_CONST WebRtc_Word32 *tmpvector = vector;
for (i = 0; i < length; i++)
{
absVal = WEBRTC_SPL_ABS_W32((*tmpvector));
if (absVal > tempMax)
{
tempMax = absVal;
}
tmpvector++;
}
retval = (WebRtc_Word32)(WEBRTC_SPL_MIN(tempMax, WEBRTC_SPL_WORD32_MAX));
return retval;
}
// Maximum value of word16 vector.
#ifndef XSCALE_OPT
WebRtc_Word16 WebRtcSpl_MaxValueW16(G_CONST WebRtc_Word16* vector, WebRtc_Word16 length)
{
WebRtc_Word16 tempMax;
WebRtc_Word16 i;
G_CONST WebRtc_Word16 *tmpvector = vector;
tempMax = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ > tempMax)
tempMax = vector[i];
}
return tempMax;
}
#else
#pragma message(">> WebRtcSpl_MaxValueW16 is excluded from this build")
#endif
// Index of maximum value in a word16 vector.
WebRtc_Word16 WebRtcSpl_MaxIndexW16(G_CONST WebRtc_Word16 *vector, WebRtc_Word16 length)
{
WebRtc_Word16 tempMax;
WebRtc_Word16 tempMaxIndex = 0;
WebRtc_Word16 i = 0;
G_CONST WebRtc_Word16 *tmpvector = vector;
tempMax = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ > tempMax)
{
tempMax = vector[i];
tempMaxIndex = i;
}
}
return tempMaxIndex;
}
// Maximum value of word32 vector.
#ifndef XSCALE_OPT
WebRtc_Word32 WebRtcSpl_MaxValueW32(G_CONST WebRtc_Word32* vector, WebRtc_Word16 length)
{
WebRtc_Word32 tempMax;
WebRtc_Word16 i;
G_CONST WebRtc_Word32 *tmpvector = vector;
tempMax = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ > tempMax)
tempMax = vector[i];
}
return tempMax;
}
#else
#pragma message(">> WebRtcSpl_MaxValueW32 is excluded from this build")
#endif
// Index of maximum value in a word32 vector.
WebRtc_Word16 WebRtcSpl_MaxIndexW32(G_CONST WebRtc_Word32* vector, WebRtc_Word16 length)
{
WebRtc_Word32 tempMax;
WebRtc_Word16 tempMaxIndex = 0;
WebRtc_Word16 i = 0;
G_CONST WebRtc_Word32 *tmpvector = vector;
tempMax = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ > tempMax)
{
tempMax = vector[i];
tempMaxIndex = i;
}
}
return tempMaxIndex;
}
// Minimum value of word16 vector.
WebRtc_Word16 WebRtcSpl_MinValueW16(G_CONST WebRtc_Word16 *vector, WebRtc_Word16 length)
{
WebRtc_Word16 tempMin;
WebRtc_Word16 i;
G_CONST WebRtc_Word16 *tmpvector = vector;
// Find the minimum value
tempMin = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ < tempMin)
tempMin = (vector[i]);
}
return tempMin;
}
// Index of minimum value in a word16 vector.
#ifndef XSCALE_OPT
WebRtc_Word16 WebRtcSpl_MinIndexW16(G_CONST WebRtc_Word16* vector, WebRtc_Word16 length)
{
WebRtc_Word16 tempMin;
WebRtc_Word16 tempMinIndex = 0;
WebRtc_Word16 i = 0;
G_CONST WebRtc_Word16* tmpvector = vector;
// Find index of smallest value
tempMin = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ < tempMin)
{
tempMin = vector[i];
tempMinIndex = i;
}
}
return tempMinIndex;
}
#else
#pragma message(">> WebRtcSpl_MinIndexW16 is excluded from this build")
#endif
// Minimum value of word32 vector.
WebRtc_Word32 WebRtcSpl_MinValueW32(G_CONST WebRtc_Word32 *vector, WebRtc_Word16 length)
{
WebRtc_Word32 tempMin;
WebRtc_Word16 i;
G_CONST WebRtc_Word32 *tmpvector = vector;
// Find the minimum value
tempMin = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ < tempMin)
tempMin = (vector[i]);
}
return tempMin;
}
// Index of minimum value in a word32 vector.
#ifndef XSCALE_OPT
WebRtc_Word16 WebRtcSpl_MinIndexW32(G_CONST WebRtc_Word32* vector, WebRtc_Word16 length)
{
WebRtc_Word32 tempMin;
WebRtc_Word16 tempMinIndex = 0;
WebRtc_Word16 i = 0;
G_CONST WebRtc_Word32 *tmpvector = vector;
// Find index of smallest value
tempMin = *tmpvector++;
for (i = 1; i < length; i++)
{
if (*tmpvector++ < tempMin)
{
tempMin = vector[i];
tempMinIndex = i;
}
}
return tempMinIndex;
}
#else
#pragma message(">> WebRtcSpl_MinIndexW32 is excluded from this build")
#endif
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