| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| /****************************************************************** |
| |
| iLBC Speech Coder ANSI-C Source Code |
| |
| WebRtcIlbcfix_InitEncode.c |
| |
| ******************************************************************/ |
| |
| #include "defines.h" |
| #include "constants.h" |
| |
| /*----------------------------------------------------------------* |
| * Initiation of encoder instance. |
| *---------------------------------------------------------------*/ |
| |
| WebRtc_Word16 WebRtcIlbcfix_InitEncode( /* (o) Number of bytes encoded */ |
| iLBC_Enc_Inst_t *iLBCenc_inst, /* (i/o) Encoder instance */ |
| WebRtc_Word16 mode) { /* (i) frame size mode */ |
| WebRtcSpl_Init(); |
| |
| iLBCenc_inst->mode = mode; |
| |
| /* Set all the variables that are dependent on the frame size mode */ |
| if (mode==30) { |
| iLBCenc_inst->blockl = BLOCKL_30MS; |
| iLBCenc_inst->nsub = NSUB_30MS; |
| iLBCenc_inst->nasub = NASUB_30MS; |
| iLBCenc_inst->lpc_n = LPC_N_30MS; |
| iLBCenc_inst->no_of_bytes = NO_OF_BYTES_30MS; |
| iLBCenc_inst->no_of_words = NO_OF_WORDS_30MS; |
| iLBCenc_inst->state_short_len=STATE_SHORT_LEN_30MS; |
| } |
| else if (mode==20) { |
| iLBCenc_inst->blockl = BLOCKL_20MS; |
| iLBCenc_inst->nsub = NSUB_20MS; |
| iLBCenc_inst->nasub = NASUB_20MS; |
| iLBCenc_inst->lpc_n = LPC_N_20MS; |
| iLBCenc_inst->no_of_bytes = NO_OF_BYTES_20MS; |
| iLBCenc_inst->no_of_words = NO_OF_WORDS_20MS; |
| iLBCenc_inst->state_short_len=STATE_SHORT_LEN_20MS; |
| } |
| else { |
| return(-1); |
| } |
| |
| /* Clear the buffers and set the previous LSF and LSP to the mean value */ |
| WebRtcSpl_MemSetW16(iLBCenc_inst->anaMem, 0, LPC_FILTERORDER); |
| WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER); |
| WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER); |
| WebRtcSpl_MemSetW16(iLBCenc_inst->lpc_buffer, 0, LPC_LOOKBACK + BLOCKL_MAX); |
| |
| /* Set the filter state of the HP filter to 0 */ |
| WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemx, 0, 2); |
| WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemy, 0, 4); |
| |
| #ifdef SPLIT_10MS |
| /*Zeroing the past samples for 10msec Split*/ |
| WebRtcSpl_MemSetW16(iLBCenc_inst->past_samples,0,160); |
| iLBCenc_inst->section = 0; |
| #endif |
| |
| return (iLBCenc_inst->no_of_bytes); |
| } |