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 "modules/audio_coding/codecs/ilbc/defines.h"
20 #include "modules/audio_coding/codecs/ilbc/constants.h"
21
22 /*----------------------------------------------------------------*
23 * Initiation of encoder instance.
24 *---------------------------------------------------------------*/
25
WebRtcIlbcfix_InitEncode(IlbcEncoder * iLBCenc_inst,int16_t mode)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