/src/opus/silk/stereo_encode_pred.c
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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 "config.h" |
30 | | #endif |
31 | | |
32 | | #include "main.h" |
33 | | |
34 | | /* Entropy code the mid/side quantization indices */ |
35 | | void silk_stereo_encode_pred( |
36 | | ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
37 | | opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */ |
38 | | ) |
39 | 0 | { |
40 | 0 | opus_int n; |
41 | | |
42 | | /* Entropy coding */ |
43 | 0 | n = 5 * ix[ 0 ][ 2 ] + ix[ 1 ][ 2 ]; |
44 | 0 | celt_assert( n < 25 ); |
45 | 0 | ec_enc_icdf( psRangeEnc, n, silk_stereo_pred_joint_iCDF, 8 ); |
46 | 0 | for( n = 0; n < 2; n++ ) { |
47 | 0 | celt_assert( ix[ n ][ 0 ] < 3 ); |
48 | 0 | celt_assert( ix[ n ][ 1 ] < STEREO_QUANT_SUB_STEPS ); |
49 | 0 | ec_enc_icdf( psRangeEnc, ix[ n ][ 0 ], silk_uniform3_iCDF, 8 ); |
50 | 0 | ec_enc_icdf( psRangeEnc, ix[ n ][ 1 ], silk_uniform5_iCDF, 8 ); |
51 | 0 | } |
52 | 0 | } |
53 | | |
54 | | /* Entropy code the mid-only flag */ |
55 | | void silk_stereo_encode_mid_only( |
56 | | ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
57 | | opus_int8 mid_only_flag |
58 | | ) |
59 | 0 | { |
60 | | /* Encode flag that only mid channel is coded */ |
61 | 0 | ec_enc_icdf( psRangeEnc, mid_only_flag, silk_stereo_only_code_mid_iCDF, 8 ); |
62 | 0 | } |