media/libopus/silk/decoder_set_fs.c@b8a032363ba2 (annotated)
media/libopus/silk/decoder_set_fs.c
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /*********************************************************************** |
| michael@0 | 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| michael@0 | 3 | Redistribution and use in source and binary forms, with or without |
| michael@0 | 4 | modification, are permitted provided that the following conditions |
| michael@0 | 5 | are met: |
| michael@0 | 6 | - Redistributions of source code must retain the above copyright notice, |
| michael@0 | 7 | this list of conditions and the following disclaimer. |
| michael@0 | 8 | - Redistributions in binary form must reproduce the above copyright |
| michael@0 | 9 | notice, this list of conditions and the following disclaimer in the |
| michael@0 | 10 | documentation and/or other materials provided with the distribution. |
| michael@0 | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| michael@0 | 12 | names of specific contributors, may be used to endorse or promote |
| michael@0 | 13 | products derived from this software without specific prior written |
| michael@0 | 14 | permission. |
| michael@0 | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| michael@0 | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| michael@0 | 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| michael@0 | 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| michael@0 | 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| michael@0 | 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| michael@0 | 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| michael@0 | 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| michael@0 | 25 | POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 26 | ***********************************************************************/ |
| michael@0 | 27 | |
| michael@0 | 28 | #ifdef HAVE_CONFIG_H |
| michael@0 | 29 | #include "config.h" |
| michael@0 | 30 | #endif |
| michael@0 | 31 | |
| michael@0 | 32 | #include "main.h" |
| michael@0 | 33 | |
| michael@0 | 34 | /* Set decoder sampling rate */ |
| michael@0 | 35 | opus_int silk_decoder_set_fs( |
| michael@0 | 36 | silk_decoder_state *psDec, /* I/O Decoder state pointer */ |
| michael@0 | 37 | opus_int fs_kHz, /* I Sampling frequency (kHz) */ |
| michael@0 | 38 | opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */ |
| michael@0 | 39 | ) |
| michael@0 | 40 | { |
| michael@0 | 41 | opus_int frame_length, ret = 0; |
| michael@0 | 42 | |
| michael@0 | 43 | silk_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 ); |
| michael@0 | 44 | silk_assert( psDec->nb_subfr == MAX_NB_SUBFR || psDec->nb_subfr == MAX_NB_SUBFR/2 ); |
| michael@0 | 45 | |
| michael@0 | 46 | /* New (sub)frame length */ |
| michael@0 | 47 | psDec->subfr_length = silk_SMULBB( SUB_FRAME_LENGTH_MS, fs_kHz ); |
| michael@0 | 48 | frame_length = silk_SMULBB( psDec->nb_subfr, psDec->subfr_length ); |
| michael@0 | 49 | |
| michael@0 | 50 | /* Initialize resampler when switching internal or external sampling frequency */ |
| michael@0 | 51 | if( psDec->fs_kHz != fs_kHz || psDec->fs_API_hz != fs_API_Hz ) { |
| michael@0 | 52 | /* Initialize the resampler for dec_API.c preparing resampling from fs_kHz to API_fs_Hz */ |
| michael@0 | 53 | ret += silk_resampler_init( &psDec->resampler_state, silk_SMULBB( fs_kHz, 1000 ), fs_API_Hz, 0 ); |
| michael@0 | 54 | |
| michael@0 | 55 | psDec->fs_API_hz = fs_API_Hz; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | if( psDec->fs_kHz != fs_kHz || frame_length != psDec->frame_length ) { |
| michael@0 | 59 | if( fs_kHz == 8 ) { |
| michael@0 | 60 | if( psDec->nb_subfr == MAX_NB_SUBFR ) { |
| michael@0 | 61 | psDec->pitch_contour_iCDF = silk_pitch_contour_NB_iCDF; |
| michael@0 | 62 | } else { |
| michael@0 | 63 | psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF; |
| michael@0 | 64 | } |
| michael@0 | 65 | } else { |
| michael@0 | 66 | if( psDec->nb_subfr == MAX_NB_SUBFR ) { |
| michael@0 | 67 | psDec->pitch_contour_iCDF = silk_pitch_contour_iCDF; |
| michael@0 | 68 | } else { |
| michael@0 | 69 | psDec->pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF; |
| michael@0 | 70 | } |
| michael@0 | 71 | } |
| michael@0 | 72 | if( psDec->fs_kHz != fs_kHz ) { |
| michael@0 | 73 | psDec->ltp_mem_length = silk_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz ); |
| michael@0 | 74 | if( fs_kHz == 8 || fs_kHz == 12 ) { |
| michael@0 | 75 | psDec->LPC_order = MIN_LPC_ORDER; |
| michael@0 | 76 | psDec->psNLSF_CB = &silk_NLSF_CB_NB_MB; |
| michael@0 | 77 | } else { |
| michael@0 | 78 | psDec->LPC_order = MAX_LPC_ORDER; |
| michael@0 | 79 | psDec->psNLSF_CB = &silk_NLSF_CB_WB; |
| michael@0 | 80 | } |
| michael@0 | 81 | if( fs_kHz == 16 ) { |
| michael@0 | 82 | psDec->pitch_lag_low_bits_iCDF = silk_uniform8_iCDF; |
| michael@0 | 83 | } else if( fs_kHz == 12 ) { |
| michael@0 | 84 | psDec->pitch_lag_low_bits_iCDF = silk_uniform6_iCDF; |
| michael@0 | 85 | } else if( fs_kHz == 8 ) { |
| michael@0 | 86 | psDec->pitch_lag_low_bits_iCDF = silk_uniform4_iCDF; |
| michael@0 | 87 | } else { |
| michael@0 | 88 | /* unsupported sampling rate */ |
| michael@0 | 89 | silk_assert( 0 ); |
| michael@0 | 90 | } |
| michael@0 | 91 | psDec->first_frame_after_reset = 1; |
| michael@0 | 92 | psDec->lagPrev = 100; |
| michael@0 | 93 | psDec->LastGainIndex = 10; |
| michael@0 | 94 | psDec->prevSignalType = TYPE_NO_VOICE_ACTIVITY; |
| michael@0 | 95 | silk_memset( psDec->outBuf, 0, sizeof(psDec->outBuf)); |
| michael@0 | 96 | silk_memset( psDec->sLPC_Q14_buf, 0, sizeof(psDec->sLPC_Q14_buf) ); |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | psDec->fs_kHz = fs_kHz; |
| michael@0 | 100 | psDec->frame_length = frame_length; |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | /* Check that settings are valid */ |
| michael@0 | 104 | silk_assert( psDec->frame_length > 0 && psDec->frame_length <= MAX_FRAME_LENGTH ); |
| michael@0 | 105 | |
| michael@0 | 106 | return ret; |
| michael@0 | 107 | } |
| michael@0 | 108 |
