media/libopus/silk/decode_pitch.c@b8a032363ba2 (annotated)
media/libopus/silk/decode_pitch.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 | /*********************************************************** |
| michael@0 | 33 | * Pitch analyser function |
| michael@0 | 34 | ********************************************************** */ |
| michael@0 | 35 | #include "SigProc_FIX.h" |
| michael@0 | 36 | #include "pitch_est_defines.h" |
| michael@0 | 37 | |
| michael@0 | 38 | void silk_decode_pitch( |
| michael@0 | 39 | opus_int16 lagIndex, /* I */ |
| michael@0 | 40 | opus_int8 contourIndex, /* O */ |
| michael@0 | 41 | opus_int pitch_lags[], /* O 4 pitch values */ |
| michael@0 | 42 | const opus_int Fs_kHz, /* I sampling frequency (kHz) */ |
| michael@0 | 43 | const opus_int nb_subfr /* I number of sub frames */ |
| michael@0 | 44 | ) |
| michael@0 | 45 | { |
| michael@0 | 46 | opus_int lag, k, min_lag, max_lag, cbk_size; |
| michael@0 | 47 | const opus_int8 *Lag_CB_ptr; |
| michael@0 | 48 | |
| michael@0 | 49 | if( Fs_kHz == 8 ) { |
| michael@0 | 50 | if( nb_subfr == PE_MAX_NB_SUBFR ) { |
| michael@0 | 51 | Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ]; |
| michael@0 | 52 | cbk_size = PE_NB_CBKS_STAGE2_EXT; |
| michael@0 | 53 | } else { |
| michael@0 | 54 | silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 ); |
| michael@0 | 55 | Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ]; |
| michael@0 | 56 | cbk_size = PE_NB_CBKS_STAGE2_10MS; |
| michael@0 | 57 | } |
| michael@0 | 58 | } else { |
| michael@0 | 59 | if( nb_subfr == PE_MAX_NB_SUBFR ) { |
| michael@0 | 60 | Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ]; |
| michael@0 | 61 | cbk_size = PE_NB_CBKS_STAGE3_MAX; |
| michael@0 | 62 | } else { |
| michael@0 | 63 | silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 ); |
| michael@0 | 64 | Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ]; |
| michael@0 | 65 | cbk_size = PE_NB_CBKS_STAGE3_10MS; |
| michael@0 | 66 | } |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz ); |
| michael@0 | 70 | max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz ); |
| michael@0 | 71 | lag = min_lag + lagIndex; |
| michael@0 | 72 | |
| michael@0 | 73 | for( k = 0; k < nb_subfr; k++ ) { |
| michael@0 | 74 | pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size ); |
| michael@0 | 75 | pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag ); |
| michael@0 | 76 | } |
| michael@0 | 77 | } |
