dce40cf804
use of int16_t/uint16_t. This is the upshot of a recommendation by henrik.lundin and kwiberg on an original small change ( https://webrtc-codereview.appspot.com/42569004/#ps1 ) to stop using int16_t just because values could fit in it, and is similar in nature to a previous "mass change to use size_t more" ( https://webrtc-codereview.appspot.com/23129004/ ) which also needed to be split up for review but to land all at once, since, like adding "const", such changes tend to cause a lot of transitive effects. This was be reviewed and approved in pieces: https://codereview.webrtc.org/1224093003 https://codereview.webrtc.org/1224123002 https://codereview.webrtc.org/1224163002 https://codereview.webrtc.org/1225133003 https://codereview.webrtc.org/1225173002 https://codereview.webrtc.org/1227163003 https://codereview.webrtc.org/1227203003 https://codereview.webrtc.org/1227213002 https://codereview.webrtc.org/1227893002 https://codereview.webrtc.org/1228793004 https://codereview.webrtc.org/1228803003 https://codereview.webrtc.org/1228823002 https://codereview.webrtc.org/1228823003 https://codereview.webrtc.org/1228843002 https://codereview.webrtc.org/1230693002 https://codereview.webrtc.org/1231713002 The change is being landed as TBR to all the folks who reviewed the above. BUG=chromium:81439 TEST=none R=andrew@webrtc.org, pbos@webrtc.org TBR=aluebs, andrew, asapersson, henrika, hlundin, jan.skoglund, kwiberg, minyue, pbos, pthatcher Review URL: https://codereview.webrtc.org/1230503003 . Cr-Commit-Position: refs/heads/master@{#9768}
68 lines
2.2 KiB
C
68 lines
2.2 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 "defines.h"
|
|
#include "gain_dequant.h"
|
|
#include "get_cd_vec.h"
|
|
|
|
/*----------------------------------------------------------------*
|
|
* Construct decoded vector from codebook and gains.
|
|
*---------------------------------------------------------------*/
|
|
|
|
void WebRtcIlbcfix_CbConstruct(
|
|
int16_t *decvector, /* (o) Decoded vector */
|
|
int16_t *index, /* (i) Codebook indices */
|
|
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 */
|
|
WebRtcIlbcfix_GetCbVec(cbvec0, mem, (size_t)index[0], lMem, veclen);
|
|
WebRtcIlbcfix_GetCbVec(cbvec1, mem, (size_t)index[1], lMem, veclen);
|
|
WebRtcIlbcfix_GetCbVec(cbvec2, mem, (size_t)index[2], lMem, veclen);
|
|
|
|
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;
|
|
}
|