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40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/******************************************************************
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iLBC Speech Coder ANSI-C Source Code
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WebRtcIlbcfix_IndexConvDec.c
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******************************************************************/
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#include "modules/audio_coding/codecs/ilbc/index_conv_dec.h"
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#include "modules/audio_coding/codecs/ilbc/defines.h"
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void WebRtcIlbcfix_IndexConvDec(
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int16_t *index /* (i/o) Codebook indexes */
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){
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int k;
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for (k=4;k<6;k++) {
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/* Readjust the second and third codebook index for the first 40 sample
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so that they look the same as the first (in terms of lag)
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*/
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if ((index[k]>=44)&&(index[k]<108)) {
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index[k]+=64;
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} else if ((index[k]>=108)&&(index[k]<128)) {
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index[k]+=128;
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} else {
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/* ERROR */
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}
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}
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}
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