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
26int16_t WebRtcIlbcfix_InitEncode(  /* (o) Number of bytes encoded */
27    iLBC_Enc_Inst_t *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 (iLBCenc_inst->no_of_bytes);
71}
72