mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-13 22:00:47 +01:00
bb547203bf
In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
/******************************************************************
|
|
|
|
iLBC Speech Coder ANSI-C Source Code
|
|
|
|
WebRtcIlbcfix_CbConstruct.c
|
|
|
|
******************************************************************/
|
|
|
|
#include "cb_construct.h"
|
|
|
|
#include "defines.h"
|
|
#include "gain_dequant.h"
|
|
#include "get_cd_vec.h"
|
|
|
|
/*----------------------------------------------------------------*
|
|
* Construct decoded vector from codebook and gains.
|
|
*---------------------------------------------------------------*/
|
|
|
|
bool WebRtcIlbcfix_CbConstruct(
|
|
int16_t* decvector, /* (o) Decoded vector */
|
|
const int16_t* index, /* (i) Codebook indices */
|
|
const int16_t* gain_index, /* (i) Gain quantization indices */
|
|
int16_t* mem, /* (i) Buffer for codevector construction */
|
|
size_t lMem, /* (i) Length of buffer */
|
|
size_t veclen) { /* (i) Length of vector */
|
|
size_t j;
|
|
int16_t gain[CB_NSTAGES];
|
|
/* Stack based */
|
|
int16_t cbvec0[SUBL];
|
|
int16_t cbvec1[SUBL];
|
|
int16_t cbvec2[SUBL];
|
|
int32_t a32;
|
|
int16_t *gainPtr;
|
|
|
|
/* gain de-quantization */
|
|
|
|
gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0);
|
|
gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1);
|
|
gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2);
|
|
|
|
/* codebook vector construction and construction of total vector */
|
|
|
|
/* Stack based */
|
|
if (!WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen))
|
|
return false; // Failure.
|
|
if (!WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen))
|
|
return false; // Failure.
|
|
if (!WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen))
|
|
return false; // Failure.
|
|
|
|
gainPtr = &gain[0];
|
|
for (j=0;j<veclen;j++) {
|
|
a32 = (*gainPtr++) * cbvec0[j];
|
|
a32 += (*gainPtr++) * cbvec1[j];
|
|
a32 += (*gainPtr) * cbvec2[j];
|
|
gainPtr -= 2;
|
|
decvector[j] = (int16_t)((a32 + 8192) >> 14);
|
|
}
|
|
|
|
return true; // Success.
|
|
}
|