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author | Frederik M J Vestre <freqmod@gmail.com> | 2012-07-26 14:38:32 +0200 |
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committer | Bertrik Sikken <bertrik@sikken.nl> | 2012-09-20 20:47:44 +0200 |
commit | 1b8e3801b2444f6e466e1b7c09cfc51605e80fb3 (patch) | |
tree | bd1d6fe08452d388d0d160ec02e03963f3f9525d /lib/rbcodec/codecs/libopus/silk/decode_pitch.c | |
parent | 72ebcbf73b4db911d517a66c820fdceccb8ec798 (diff) | |
download | rockbox-1b8e3801b2444f6e466e1b7c09cfc51605e80fb3.tar.gz rockbox-1b8e3801b2444f6e466e1b7c09cfc51605e80fb3.zip |
Initial opus codec support
Synchronised with opus repo on github (https://github.com/freqmod/rockbox-opus)
Status:
* Seeking ported from speex, but fails on some cases (e.g. seek to granule 0)
* ReplayGain parsing needs to be reworked, we do vorbis-style replaygain now.
http://wiki.xiph.org/OggOpus#Comment_Header explicitly forbids these in
favour of R128_TRACK_GAIN tag.
* No optimisation yet, source files still nearly identical to opus upstream
* Multi-stream opus files may not be parsed correctly
Change-Id: Ia66f1027dc1d288083e3c57b2816700078376f9a
Reviewed-on: http://gerrit.rockbox.org/300
Reviewed-by: Bertrik Sikken <bertrik@sikken.nl>
Tested-by: Bertrik Sikken <bertrik@sikken.nl>
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. | ||
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13 | products derived from this software without specific prior written | ||
14 | permission. | ||
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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 | ||
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23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
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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 | } | ||