diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/decode_frame.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/decode_frame.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/decode_frame.c b/lib/rbcodec/codecs/libopus/silk/decode_frame.c new file mode 100644 index 0000000000..349df506e5 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/decode_frame.c | |||
@@ -0,0 +1,128 @@ | |||
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 | #include "stack_alloc.h" | ||
34 | #include "PLC.h" | ||
35 | |||
36 | /****************/ | ||
37 | /* Decode frame */ | ||
38 | /****************/ | ||
39 | opus_int silk_decode_frame( | ||
40 | silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */ | ||
41 | ec_dec *psRangeDec, /* I/O Compressor data structure */ | ||
42 | opus_int16 pOut[], /* O Pointer to output speech frame */ | ||
43 | opus_int32 *pN, /* O Pointer to size of output frame */ | ||
44 | opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */ | ||
45 | opus_int condCoding /* I The type of conditional coding to use */ | ||
46 | ) | ||
47 | { | ||
48 | VARDECL( silk_decoder_control, psDecCtrl ); | ||
49 | opus_int L, mv_len, ret = 0; | ||
50 | VARDECL( opus_int, pulses ); | ||
51 | SAVE_STACK; | ||
52 | |||
53 | L = psDec->frame_length; | ||
54 | ALLOC( psDecCtrl, 1, silk_decoder_control ); | ||
55 | ALLOC( pulses, (L + SHELL_CODEC_FRAME_LENGTH - 1) & | ||
56 | ~(SHELL_CODEC_FRAME_LENGTH - 1), opus_int ); | ||
57 | psDecCtrl->LTP_scale_Q14 = 0; | ||
58 | |||
59 | /* Safety checks */ | ||
60 | silk_assert( L > 0 && L <= MAX_FRAME_LENGTH ); | ||
61 | |||
62 | if( lostFlag == FLAG_DECODE_NORMAL || | ||
63 | ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) ) | ||
64 | { | ||
65 | /*********************************************/ | ||
66 | /* Decode quantization indices of side info */ | ||
67 | /*********************************************/ | ||
68 | silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag, condCoding ); | ||
69 | |||
70 | /*********************************************/ | ||
71 | /* Decode quantization indices of excitation */ | ||
72 | /*********************************************/ | ||
73 | silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType, | ||
74 | psDec->indices.quantOffsetType, psDec->frame_length ); | ||
75 | |||
76 | /********************************************/ | ||
77 | /* Decode parameters and pulse signal */ | ||
78 | /********************************************/ | ||
79 | silk_decode_parameters( psDec, psDecCtrl, condCoding ); | ||
80 | |||
81 | /********************************************************/ | ||
82 | /* Run inverse NSQ */ | ||
83 | /********************************************************/ | ||
84 | silk_decode_core( psDec, psDecCtrl, pOut, pulses ); | ||
85 | |||
86 | /********************************************************/ | ||
87 | /* Update PLC state */ | ||
88 | /********************************************************/ | ||
89 | silk_PLC( psDec, psDecCtrl, pOut, 0 ); | ||
90 | |||
91 | psDec->lossCnt = 0; | ||
92 | psDec->prevSignalType = psDec->indices.signalType; | ||
93 | silk_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 ); | ||
94 | |||
95 | /* A frame has been decoded without errors */ | ||
96 | psDec->first_frame_after_reset = 0; | ||
97 | } else { | ||
98 | /* Handle packet loss by extrapolation */ | ||
99 | silk_PLC( psDec, psDecCtrl, pOut, 1 ); | ||
100 | } | ||
101 | |||
102 | /*************************/ | ||
103 | /* Update output buffer. */ | ||
104 | /*************************/ | ||
105 | silk_assert( psDec->ltp_mem_length >= psDec->frame_length ); | ||
106 | mv_len = psDec->ltp_mem_length - psDec->frame_length; | ||
107 | silk_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(opus_int16) ); | ||
108 | silk_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( opus_int16 ) ); | ||
109 | |||
110 | /****************************************************************/ | ||
111 | /* Ensure smooth connection of extrapolated and good frames */ | ||
112 | /****************************************************************/ | ||
113 | silk_PLC_glue_frames( psDec, pOut, L ); | ||
114 | |||
115 | /************************************************/ | ||
116 | /* Comfort noise generation / estimation */ | ||
117 | /************************************************/ | ||
118 | silk_CNG( psDec, psDecCtrl, pOut, L ); | ||
119 | |||
120 | /* Update some decoder state variables */ | ||
121 | psDec->lagPrev = psDecCtrl->pitchL[ psDec->nb_subfr - 1 ]; | ||
122 | |||
123 | /* Set output frame length */ | ||
124 | *pN = L; | ||
125 | |||
126 | RESTORE_STACK; | ||
127 | return ret; | ||
128 | } | ||