1 /* 2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /****************************************************************** 12 13 IiLBC Speech Coder ANSI-C Source Code 14 15 WebRtcIlbcfix_IndexConvEnc.c 16 17 ******************************************************************/ 18 19 #include "defines.h" 20 /*----------------------------------------------------------------* 21 * Convert the codebook indexes to make the search easier 22 *---------------------------------------------------------------*/ 23 24 void WebRtcIlbcfix_IndexConvEnc( 25 int16_t *index /* (i/o) Codebook indexes */ 26 ){ 27 int k; 28 29 for (k=4;k<6;k++) { 30 /* Readjust the second and third codebook index so that it is 31 packetized into 7 bits (before it was put in lag-wise the same 32 way as for the first codebook which uses 8 bits) 33 */ 34 if ((index[k]>=108)&&(index[k]<172)) { 35 index[k]-=64; 36 } else if (index[k]>=236) { 37 index[k]-=128; 38 } else { 39 /* ERROR */ 40 } 41 } 42 } 43
