1b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org/* 2b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. 3b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * 4b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * Use of this source code is governed by a BSD-style license 5b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * that can be found in the LICENSE file in the root of the source 6b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * tree. An additional intellectual property rights grant can be found 7b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * in the file PATENTS. All contributing project authors may 8b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * be found in the AUTHORS file in the root of the source tree. 9b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org */ 10b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 11b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org/****************************************************************** 12b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 13b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBC Speech Coder ANSI-C Source Code 14b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 15b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcIlbcfix_CbConstruct.c 16b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 17b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org******************************************************************/ 18b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 19b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org#include "defines.h" 20b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org#include "gain_dequant.h" 21b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org#include "get_cd_vec.h" 22b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 23b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org/*----------------------------------------------------------------* 24b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * Construct decoded vector from codebook and gains. 25b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org *---------------------------------------------------------------*/ 26b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 27b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.orgvoid WebRtcIlbcfix_CbConstruct( 28fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t *decvector, /* (o) Decoded vector */ 29fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t *index, /* (i) Codebook indices */ 30fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t *gain_index, /* (i) Gain quantization indices */ 31fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t *mem, /* (i) Buffer for codevector construction */ 32fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t lMem, /* (i) Length of buffer */ 33fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t veclen /* (i) Length of vector */ 34b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org ){ 35b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org int j; 36fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t gain[CB_NSTAGES]; 37b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Stack based */ 38fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t cbvec0[SUBL]; 39fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t cbvec1[SUBL]; 40fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t cbvec2[SUBL]; 41fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int32_t a32; 42fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t *gainPtr; 43b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 44b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* gain de-quantization */ 45b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 46b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org gain[0] = WebRtcIlbcfix_GainDequant(gain_index[0], 16384, 0); 47b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org gain[1] = WebRtcIlbcfix_GainDequant(gain_index[1], gain[0], 1); 48b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org gain[2] = WebRtcIlbcfix_GainDequant(gain_index[2], gain[1], 2); 49b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 50b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* codebook vector construction and construction of total vector */ 51b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 52b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Stack based */ 53b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcIlbcfix_GetCbVec(cbvec0, mem, index[0], lMem, veclen); 54b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcIlbcfix_GetCbVec(cbvec1, mem, index[1], lMem, veclen); 55b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcIlbcfix_GetCbVec(cbvec2, mem, index[2], lMem, veclen); 56b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 57b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org gainPtr = &gain[0]; 58b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org for (j=0;j<veclen;j++) { 59b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org a32 = WEBRTC_SPL_MUL_16_16(*gainPtr++, cbvec0[j]); 60b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org a32 += WEBRTC_SPL_MUL_16_16(*gainPtr++, cbvec1[j]); 61b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org a32 += WEBRTC_SPL_MUL_16_16(*gainPtr, cbvec2[j]); 62b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org gainPtr -= 2; 63fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org decvector[j] = (int16_t) WEBRTC_SPL_RSHIFT_W32(a32 + 8192, 14); 64b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 65b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 66b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org return; 67b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org} 68