diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/decoder_set_fs.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/decoder_set_fs.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/decoder_set_fs.c b/lib/rbcodec/codecs/libopus/silk/decoder_set_fs.c new file mode 100644 index 0000000000..fcc26d7a0e --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/decoder_set_fs.c | |||
@@ -0,0 +1,108 @@ | |||
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 "opus_config.h" | ||
30 | #endif | ||
31 | |||
32 | #include "main.h" | ||
33 | |||
34 | /* Set decoder sampling rate */ | ||
35 | 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 | opus_int frame_length, ret = 0; | ||
42 | |||
43 | silk_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 ); | ||
44 | silk_assert( psDec->nb_subfr == MAX_NB_SUBFR || psDec->nb_subfr == MAX_NB_SUBFR/2 ); | ||
45 | |||
46 | /* New (sub)frame length */ | ||
47 | psDec->subfr_length = silk_SMULBB( SUB_FRAME_LENGTH_MS, fs_kHz ); | ||
48 | frame_length = silk_SMULBB( psDec->nb_subfr, psDec->subfr_length ); | ||
49 | |||
50 | /* Initialize resampler when switching internal or external sampling frequency */ | ||
51 | 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 | ret += silk_resampler_init( &psDec->resampler_state, silk_SMULBB( fs_kHz, 1000 ), fs_API_Hz, 0 ); | ||
54 | |||
55 | psDec->fs_API_hz = fs_API_Hz; | ||
56 | } | ||
57 | |||
58 | if( psDec->fs_kHz != fs_kHz || frame_length != psDec->frame_length ) { | ||
59 | if( fs_kHz == 8 ) { | ||
60 | if( psDec->nb_subfr == MAX_NB_SUBFR ) { | ||
61 | psDec->pitch_contour_iCDF = silk_pitch_contour_NB_iCDF; | ||
62 | } else { | ||
63 | psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF; | ||
64 | } | ||
65 | } else { | ||
66 | if( psDec->nb_subfr == MAX_NB_SUBFR ) { | ||
67 | psDec->pitch_contour_iCDF = silk_pitch_contour_iCDF; | ||
68 | } else { | ||
69 | psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF; | ||
70 | } | ||
71 | } | ||
72 | if( psDec->fs_kHz != fs_kHz ) { | ||
73 | psDec->ltp_mem_length = silk_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz ); | ||
74 | if( fs_kHz == 8 || fs_kHz == 12 ) { | ||
75 | psDec->LPC_order = MIN_LPC_ORDER; | ||
76 | psDec->psNLSF_CB = &silk_NLSF_CB_NB_MB; | ||
77 | } else { | ||
78 | psDec->LPC_order = MAX_LPC_ORDER; | ||
79 | psDec->psNLSF_CB = &silk_NLSF_CB_WB; | ||
80 | } | ||
81 | if( fs_kHz == 16 ) { | ||
82 | psDec->pitch_lag_low_bits_iCDF = silk_uniform8_iCDF; | ||
83 | } else if( fs_kHz == 12 ) { | ||
84 | psDec->pitch_lag_low_bits_iCDF = silk_uniform6_iCDF; | ||
85 | } else if( fs_kHz == 8 ) { | ||
86 | psDec->pitch_lag_low_bits_iCDF = silk_uniform4_iCDF; | ||
87 | } else { | ||
88 | /* unsupported sampling rate */ | ||
89 | silk_assert( 0 ); | ||
90 | } | ||
91 | psDec->first_frame_after_reset = 1; | ||
92 | psDec->lagPrev = 100; | ||
93 | psDec->LastGainIndex = 10; | ||
94 | psDec->prevSignalType = TYPE_NO_VOICE_ACTIVITY; | ||
95 | silk_memset( psDec->outBuf, 0, sizeof(psDec->outBuf)); | ||
96 | silk_memset( psDec->sLPC_Q14_buf, 0, sizeof(psDec->sLPC_Q14_buf) ); | ||
97 | } | ||
98 | |||
99 | psDec->fs_kHz = fs_kHz; | ||
100 | psDec->frame_length = frame_length; | ||
101 | } | ||
102 | |||
103 | /* Check that settings are valid */ | ||
104 | silk_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH ); | ||
105 | |||
106 | return ret; | ||
107 | } | ||
108 | |||