1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* 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 "modules/audio_coding/codecs/ilbc/init_encode.h"
#include "modules/audio_coding/codecs/ilbc/constants.h"
#include "modules/audio_coding/codecs/ilbc/defines.h"
/*----------------------------------------------------------------*
* Initiation of encoder instance.
*---------------------------------------------------------------*/
int WebRtcIlbcfix_InitEncode( /* (o) Number of bytes encoded */
IlbcEncoder *iLBCenc_inst, /* (i/o) Encoder instance */
int16_t mode) { /* (i) frame size mode */
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 (int)(iLBCenc_inst->no_of_bytes);
}
|
