Line data Source code
1 : /***********************************************************************
2 : Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3 : Redistribution and use in source and binary forms, with or without
4 : modification, are permitted provided that the following conditions
5 : are met:
6 : - Redistributions of source code must retain the above copyright notice,
7 : this list of conditions and the following disclaimer.
8 : - Redistributions in binary form must reproduce the above copyright
9 : notice, this list of conditions and the following disclaimer in the
10 : documentation and/or other materials provided with the distribution.
11 : - Neither the name of Internet Society, IETF or IETF Trust, nor the
12 : names of specific contributors, may be used to endorse or promote
13 : products derived from this software without specific prior written
14 : permission.
15 : THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 : AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 : IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 : ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 : LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 : CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 : SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 : INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 : CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 : ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 : POSSIBILITY OF SUCH DAMAGE.
26 : ***********************************************************************/
27 :
28 : #ifdef HAVE_CONFIG_H
29 : #include "config.h"
30 : #endif
31 :
32 : #include "main.h"
33 :
34 : /* Set decoder sampling rate */
35 0 : opus_int silk_decoder_set_fs(
36 : silk_decoder_state *psDec, /* I/O Decoder state pointer */
37 : opus_int fs_kHz, /* I Sampling frequency (kHz) */
38 : opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */
39 : )
40 : {
41 0 : opus_int frame_length, ret = 0;
42 :
43 0 : silk_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 );
44 0 : silk_assert( psDec->nb_subfr == MAX_NB_SUBFR || psDec->nb_subfr == MAX_NB_SUBFR/2 );
45 :
46 : /* New (sub)frame length */
47 0 : psDec->subfr_length = silk_SMULBB( SUB_FRAME_LENGTH_MS, fs_kHz );
48 0 : frame_length = silk_SMULBB( psDec->nb_subfr, psDec->subfr_length );
49 :
50 : /* Initialize resampler when switching internal or external sampling frequency */
51 0 : if( psDec->fs_kHz != fs_kHz || psDec->fs_API_hz != fs_API_Hz ) {
52 : /* Initialize the resampler for dec_API.c preparing resampling from fs_kHz to API_fs_Hz */
53 0 : ret += silk_resampler_init( &psDec->resampler_state, silk_SMULBB( fs_kHz, 1000 ), fs_API_Hz, 0 );
54 :
55 0 : psDec->fs_API_hz = fs_API_Hz;
56 : }
57 :
58 0 : if( psDec->fs_kHz != fs_kHz || frame_length != psDec->frame_length ) {
59 0 : if( fs_kHz == 8 ) {
60 0 : if( psDec->nb_subfr == MAX_NB_SUBFR ) {
61 0 : psDec->pitch_contour_iCDF = silk_pitch_contour_NB_iCDF;
62 : } else {
63 0 : psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF;
64 : }
65 : } else {
66 0 : if( psDec->nb_subfr == MAX_NB_SUBFR ) {
67 0 : psDec->pitch_contour_iCDF = silk_pitch_contour_iCDF;
68 : } else {
69 0 : psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF;
70 : }
71 : }
72 0 : if( psDec->fs_kHz != fs_kHz ) {
73 0 : psDec->ltp_mem_length = silk_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz );
74 0 : if( fs_kHz == 8 || fs_kHz == 12 ) {
75 0 : psDec->LPC_order = MIN_LPC_ORDER;
76 0 : psDec->psNLSF_CB = &silk_NLSF_CB_NB_MB;
77 : } else {
78 0 : psDec->LPC_order = MAX_LPC_ORDER;
79 0 : psDec->psNLSF_CB = &silk_NLSF_CB_WB;
80 : }
81 0 : if( fs_kHz == 16 ) {
82 0 : psDec->pitch_lag_low_bits_iCDF = silk_uniform8_iCDF;
83 0 : } else if( fs_kHz == 12 ) {
84 0 : psDec->pitch_lag_low_bits_iCDF = silk_uniform6_iCDF;
85 0 : } else if( fs_kHz == 8 ) {
86 0 : psDec->pitch_lag_low_bits_iCDF = silk_uniform4_iCDF;
87 : } else {
88 : /* unsupported sampling rate */
89 0 : silk_assert( 0 );
90 : }
91 0 : psDec->first_frame_after_reset = 1;
92 0 : psDec->lagPrev = 100;
93 0 : psDec->LastGainIndex = 10;
94 0 : psDec->prevSignalType = TYPE_NO_VOICE_ACTIVITY;
95 0 : silk_memset( psDec->outBuf, 0, sizeof(psDec->outBuf));
96 0 : silk_memset( psDec->sLPC_Q14_buf, 0, sizeof(psDec->sLPC_Q14_buf) );
97 : }
98 :
99 0 : psDec->fs_kHz = fs_kHz;
100 0 : psDec->frame_length = frame_length;
101 : }
102 :
103 : /* Check that settings are valid */
104 0 : silk_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH );
105 :
106 0 : return ret;
107 : }
108 :
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