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_InitDecode.c 16b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 17b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org******************************************************************/ 18b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 19b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org#include "defines.h" 20b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org#include "constants.h" 21b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 22b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org/*----------------------------------------------------------------* 23b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org * Initiation of decoder instance. 24b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org *---------------------------------------------------------------*/ 25b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 26fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.orgint16_t WebRtcIlbcfix_InitDecode( /* (o) Number of decoded samples */ 27b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBC_Dec_Inst_t *iLBCdec_inst, /* (i/o) Decoder instance */ 28fbda0fcf2f9e82c82bcaac138f44d4e5144f6e0dpbos@webrtc.org int16_t mode, /* (i) frame size mode */ 29b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org int use_enhancer) { /* (i) 1: use enhancer, 0: no enhancer */ 30b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org int i; 31b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 32b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->mode = mode; 33b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 34b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Set all the variables that are dependent on the frame size mode */ 35b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org if (mode==30) { 36b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->blockl = BLOCKL_30MS; 37b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->nsub = NSUB_30MS; 38b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->nasub = NASUB_30MS; 39b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->lpc_n = LPC_N_30MS; 40b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->no_of_bytes = NO_OF_BYTES_30MS; 41b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->no_of_words = NO_OF_WORDS_30MS; 42b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->state_short_len=STATE_SHORT_LEN_30MS; 43b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 44b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org else if (mode==20) { 45b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->blockl = BLOCKL_20MS; 46b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->nsub = NSUB_20MS; 47b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->nasub = NASUB_20MS; 48b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->lpc_n = LPC_N_20MS; 49b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->no_of_bytes = NO_OF_BYTES_20MS; 50b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->no_of_words = NO_OF_WORDS_20MS; 51b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->state_short_len=STATE_SHORT_LEN_20MS; 52b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 53b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org else { 54b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org return(-1); 55b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 56b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 57b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Reset all the previous LSF to mean LSF */ 58b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WEBRTC_SPL_MEMCPY_W16(iLBCdec_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER); 59b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 60b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Clear the synthesis filter memory */ 61b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->syntMem, 0, LPC_FILTERORDER); 62b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 63b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Set the old synthesis filter to {1.0 0.0 ... 0.0} */ 64b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->old_syntdenum, 0, ((LPC_FILTERORDER + 1)*NSUB_MAX)); 65b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org for (i=0; i<NSUB_MAX; i++) { 66b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->old_syntdenum[i*(LPC_FILTERORDER+1)] = 4096; 67b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 68b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 69b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Clear the variables that are used for the PLC */ 70b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->last_lag = 20; 71b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->consPLICount = 0; 72b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->prevPLI = 0; 73b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->perSquare = 0; 74b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->prevLag = 120; 75b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->prevLpc[0] = 4096; 76b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->prevLpc+1, 0, LPC_FILTERORDER); 77b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->prevResidual, 0, BLOCKL_MAX); 78b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 79b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Initialize the seed for the random number generator */ 80b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->seed = 777; 81b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 82b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Set the filter state of the HP filter to 0 */ 83b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemx, 0, 2); 84b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->hpimemy, 0, 4); 85b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 86b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org /* Set the variables that are used in the ehnahcer */ 87b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->use_enhancer = use_enhancer; 88b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org WebRtcSpl_MemSetW16(iLBCdec_inst->enh_buf, 0, (ENH_BUFL+ENH_BUFL_FILTEROVERHEAD)); 89b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org for (i=0;i<ENH_NBLOCKS_TOT;i++) { 90b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->enh_period[i]=160; /* Q(-4) */ 91b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org } 92b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 93b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org iLBCdec_inst->prev_enh_pl = 0; 94b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org 95b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org return (iLBCdec_inst->blockl); 96b015cbede88899f67a53fbbe581b02ce8e32794andrew@webrtc.org} 97