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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/NLSF_unpack.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/NLSF_unpack.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/NLSF_unpack.c b/lib/rbcodec/codecs/libopus/silk/NLSF_unpack.c new file mode 100644 index 0000000000..5e059f2615 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/NLSF_unpack.c | |||
@@ -0,0 +1,55 @@ | |||
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 | #include "main.h" | ||
33 | |||
34 | /* Unpack predictor values and indices for entropy coding tables */ | ||
35 | void silk_NLSF_unpack( | ||
36 | opus_int16 ec_ix[], /* O Indices to entropy tables [ LPC_ORDER ] */ | ||
37 | opus_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */ | ||
38 | const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */ | ||
39 | const opus_int CB1_index /* I Index of vector in first LSF codebook */ | ||
40 | ) | ||
41 | { | ||
42 | opus_int i; | ||
43 | opus_uint8 entry; | ||
44 | const opus_uint8 *ec_sel_ptr; | ||
45 | |||
46 | ec_sel_ptr = &psNLSF_CB->ec_sel[ CB1_index * psNLSF_CB->order / 2 ]; | ||
47 | for( i = 0; i < psNLSF_CB->order; i += 2 ) { | ||
48 | entry = *ec_sel_ptr++; | ||
49 | ec_ix [ i ] = silk_SMULBB( silk_RSHIFT( entry, 1 ) & 7, 2 * NLSF_QUANT_MAX_AMPLITUDE + 1 ); | ||
50 | pred_Q8[ i ] = psNLSF_CB->pred_Q8[ i + ( entry & 1 ) * ( psNLSF_CB->order - 1 ) ]; | ||
51 | ec_ix [ i + 1 ] = silk_SMULBB( silk_RSHIFT( entry, 5 ) & 7, 2 * NLSF_QUANT_MAX_AMPLITUDE + 1 ); | ||
52 | pred_Q8[ i + 1 ] = psNLSF_CB->pred_Q8[ i + ( silk_RSHIFT( entry, 4 ) & 1 ) * ( psNLSF_CB->order - 1 ) + 1 ]; | ||
53 | } | ||
54 | } | ||
55 | |||