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72 lines
2.5 KiB
C
72 lines
2.5 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/******************************************************************
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iLBC Speech Coder ANSI-C Source Code
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WebRtcIlbcfix_InitEncode.c
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******************************************************************/
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#include "defines.h"
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#include "constants.h"
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/*----------------------------------------------------------------*
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* Initiation of encoder instance.
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*---------------------------------------------------------------*/
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int16_t WebRtcIlbcfix_InitEncode( /* (o) Number of bytes encoded */
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iLBC_Enc_Inst_t *iLBCenc_inst, /* (i/o) Encoder instance */
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int16_t mode) { /* (i) frame size mode */
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iLBCenc_inst->mode = mode;
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/* Set all the variables that are dependent on the frame size mode */
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if (mode==30) {
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iLBCenc_inst->blockl = BLOCKL_30MS;
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iLBCenc_inst->nsub = NSUB_30MS;
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iLBCenc_inst->nasub = NASUB_30MS;
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iLBCenc_inst->lpc_n = LPC_N_30MS;
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iLBCenc_inst->no_of_bytes = NO_OF_BYTES_30MS;
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iLBCenc_inst->no_of_words = NO_OF_WORDS_30MS;
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iLBCenc_inst->state_short_len=STATE_SHORT_LEN_30MS;
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}
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else if (mode==20) {
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iLBCenc_inst->blockl = BLOCKL_20MS;
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iLBCenc_inst->nsub = NSUB_20MS;
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iLBCenc_inst->nasub = NASUB_20MS;
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iLBCenc_inst->lpc_n = LPC_N_20MS;
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iLBCenc_inst->no_of_bytes = NO_OF_BYTES_20MS;
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iLBCenc_inst->no_of_words = NO_OF_WORDS_20MS;
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iLBCenc_inst->state_short_len=STATE_SHORT_LEN_20MS;
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}
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else {
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return(-1);
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}
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/* Clear the buffers and set the previous LSF and LSP to the mean value */
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WebRtcSpl_MemSetW16(iLBCenc_inst->anaMem, 0, LPC_FILTERORDER);
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WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER);
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WEBRTC_SPL_MEMCPY_W16(iLBCenc_inst->lsfdeqold, WebRtcIlbcfix_kLsfMean, LPC_FILTERORDER);
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WebRtcSpl_MemSetW16(iLBCenc_inst->lpc_buffer, 0, LPC_LOOKBACK + BLOCKL_MAX);
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/* Set the filter state of the HP filter to 0 */
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WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemx, 0, 2);
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WebRtcSpl_MemSetW16(iLBCenc_inst->hpimemy, 0, 4);
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#ifdef SPLIT_10MS
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/*Zeroing the past samples for 10msec Split*/
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WebRtcSpl_MemSetW16(iLBCenc_inst->past_samples,0,160);
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iLBCenc_inst->section = 0;
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#endif
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return (iLBCenc_inst->no_of_bytes);
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}
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