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 iLBC Speech Coder ANSI-C Source Code 14 15 WebRtcIlbcfix_InitEncode.c 16 17 ******************************************************************/ 18 19 #include "defines.h" 20 #include "constants.h" 21 22 /*----------------------------------------------------------------* 23 * Initiation of encoder instance. 24 *---------------------------------------------------------------*/ 25 26 int WebRtcIlbcfix_InitEncode( /* (o) Number of bytes encoded */ 27 IlbcEncoder *iLBCenc_inst, /* (i/o) Encoder instance */ 28 int16_t mode) { /* (i) frame size mode */ 29 iLBCenc_inst->mode = mode; 30 31 /* Set all the variables that are dependent on the frame size mode */ 32 if (mode==30) { 33 iLBCenc_inst->blockl = BLOCKL_30MS; 34 iLBCenc_inst->nsub = NSUB_30MS; 35 iLBCenc_inst->nasub = NASUB_30MS; 36 iLBCenc_inst->lpc_n = LPC_N_30MS; 37 iLBCenc_inst->no_of_bytes = NO_OF_BYTES_30MS; 38 iLBCenc_inst->no_of_words = NO_OF_WORDS_30MS; 39 iLBCenc_inst->state_short_len=STATE_SHORT_LEN_30MS; 40 } 41 else if (mode==20) { 42 iLBCenc_inst->blockl = BLOCKL_20MS; 43 iLBCenc_inst->nsub = NSUB_20MS; 44 iLBCenc_inst->nasub = NASUB_20MS; 45 iLBCenc_inst->lpc_n = LPC_N_20MS; 46 iLBCenc_inst->no_of_bytes = NO_OF_BYTES_20MS; 47 iLBCenc_inst->no_of_words = NO_OF_WORDS_20MS; 48 iLBCenc_inst->state_short_len=STATE_SHORT_LEN_20MS; 49 } 50 else { 51 return(-1); 52 } 53 54 /* Clear the buffers and set the previous LSF and LSP to the mean value */ 55 WebRtcSpl_MemSetW16(iLBCenc_inst->anaMem, 0, LPC_FILTERORDER); 56 WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER); 57 WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER); 58 WebRtcSpl_MemSetW16(iLBCenc_inst->lpc_buffer, 0, LPC_LOOKBACK + BLOCKL_MAX); 59 60 /* Set the filter state of the HP filter to 0 */ 61 WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemx, 0, 2); 62 WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemy, 0, 4); 63 64 #ifdef SPLIT_10MS 65 /*Zeroing the past samples for 10msec Split*/ 66 WebRtcSpl_MemSetW16(iLBCenc_inst->past_samples,0,160); 67 iLBCenc_inst->section = 0; 68 #endif 69 70 return (int)(iLBCenc_inst->no_of_bytes); 71 } 72
