diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/decode_pitch.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/decode_pitch.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/decode_pitch.c b/lib/rbcodec/codecs/libopus/silk/decode_pitch.c new file mode 100644 index 0000000000..8190a19e51 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/decode_pitch.c | |||
@@ -0,0 +1,77 @@ | |||
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 | /*********************************************************** | ||
33 | * Pitch analyser function | ||
34 | ********************************************************** */ | ||
35 | #include "SigProc_FIX.h" | ||
36 | #include "pitch_est_defines.h" | ||
37 | |||
38 | void silk_decode_pitch( | ||
39 | opus_int16 lagIndex, /* I */ | ||
40 | opus_int8 contourIndex, /* O */ | ||
41 | opus_int pitch_lags[], /* O 4 pitch values */ | ||
42 | const opus_int Fs_kHz, /* I sampling frequency (kHz) */ | ||
43 | const opus_int nb_subfr /* I number of sub frames */ | ||
44 | ) | ||
45 | { | ||
46 | opus_int lag, k, min_lag, max_lag, cbk_size; | ||
47 | const opus_int8 *Lag_CB_ptr; | ||
48 | |||
49 | if( Fs_kHz == 8 ) { | ||
50 | if( nb_subfr == PE_MAX_NB_SUBFR ) { | ||
51 | Lag_CB_ptr = &silk_CB_lags_stage2[ 0 ][ 0 ]; | ||
52 | cbk_size = PE_NB_CBKS_STAGE2_EXT; | ||
53 | } else { | ||
54 | silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 ); | ||
55 | Lag_CB_ptr = &silk_CB_lags_stage2_10_ms[ 0 ][ 0 ]; | ||
56 | cbk_size = PE_NB_CBKS_STAGE2_10MS; | ||
57 | } | ||
58 | } else { | ||
59 | if( nb_subfr == PE_MAX_NB_SUBFR ) { | ||
60 | Lag_CB_ptr = &silk_CB_lags_stage3[ 0 ][ 0 ]; | ||
61 | cbk_size = PE_NB_CBKS_STAGE3_MAX; | ||
62 | } else { | ||
63 | silk_assert( nb_subfr == PE_MAX_NB_SUBFR >> 1 ); | ||
64 | Lag_CB_ptr = &silk_CB_lags_stage3_10_ms[ 0 ][ 0 ]; | ||
65 | cbk_size = PE_NB_CBKS_STAGE3_10MS; | ||
66 | } | ||
67 | } | ||
68 | |||
69 | min_lag = silk_SMULBB( PE_MIN_LAG_MS, Fs_kHz ); | ||
70 | max_lag = silk_SMULBB( PE_MAX_LAG_MS, Fs_kHz ); | ||
71 | lag = min_lag + lagIndex; | ||
72 | |||
73 | for( k = 0; k < nb_subfr; k++ ) { | ||
74 | pitch_lags[ k ] = lag + matrix_ptr( Lag_CB_ptr, k, contourIndex, cbk_size ); | ||
75 | pitch_lags[ k ] = silk_LIMIT( pitch_lags[ k ], min_lag, max_lag ); | ||
76 | } | ||
77 | } | ||