diff options
author | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2011-09-16 12:16:53 +0400 |
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committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2011-09-16 12:16:53 +0400 |
commit | 1c2f5633d101c08b5ef8095a8682d3d52cbd952d (patch) | |
tree | 66f80e67f075db5fa5233759a89f475d8bedade2 /silk/decode_frame.c | |
parent | fb3a437c9dabb4aafe4a3927158161590ed745ab (diff) |
Removed all the silk_ prefixes in source file names (not symbols)
Diffstat (limited to 'silk/decode_frame.c')
-rw-r--r-- | silk/decode_frame.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/silk/decode_frame.c b/silk/decode_frame.c new file mode 100644 index 00000000..d70dccb1 --- /dev/null +++ b/silk/decode_frame.c @@ -0,0 +1,137 @@ +/*********************************************************************** +Copyright (c) 2006-2011, Skype Limited. All rights reserved. +Redistribution and use in source and binary forms, with or without +modification, (subject to the limitations in the disclaimer below) +are permitted provided that the following conditions are met: +- Redistributions of source code must retain the above copyright notice, +this list of conditions and the following disclaimer. +- Redistributions in binary form must reproduce the above copyright +notice, this list of conditions and the following disclaimer in the +documentation and/or other materials provided with the distribution. +- Neither the name of Skype Limited, nor the names of specific +contributors, may be used to endorse or promote products derived from +this software without specific prior written permission. +NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED +BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND +CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, +BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND +FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT +NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF +USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON +ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +***********************************************************************/ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "main.h" +#include "PLC.h" + +/****************/ +/* Decode frame */ +/****************/ +opus_int silk_decode_frame( + silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */ + ec_dec *psRangeDec, /* I/O Compressor data structure */ + opus_int16 pOut[], /* O Pointer to output speech frame */ + opus_int32 *pN, /* O Pointer to size of output frame */ + opus_int lostFlag /* I 0: no loss, 1 loss, 2 decode fec */ +) +{ + silk_decoder_control sDecCtrl; + opus_int L, mv_len, ret = 0; + opus_int pulses[ MAX_FRAME_LENGTH ]; + +TIC(DECODE_FRAME) + + L = psDec->frame_length; + sDecCtrl.LTP_scale_Q14 = 0; + + /* Safety checks */ + silk_assert( L > 0 && L <= MAX_FRAME_LENGTH ); + + if( lostFlag == FLAG_DECODE_NORMAL || + ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) ) + { + /*********************************************/ + /* Decode quantization indices of side info */ + /*********************************************/ +TIC(decode_indices) + silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag ); +TOC(decode_indices) + + /*********************************************/ + /* Decode quantization indices of excitation */ + /*********************************************/ +TIC(decode_pulses) + silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType, + psDec->indices.quantOffsetType, psDec->frame_length ); +TOC(decode_pulses) + + /********************************************/ + /* Decode parameters and pulse signal */ + /********************************************/ +TIC(decode_params) + silk_decode_parameters( psDec, &sDecCtrl ); +TOC(decode_params) + + /* Update length. Sampling frequency may have changed */ + L = psDec->frame_length; + + /********************************************************/ + /* Run inverse NSQ */ + /********************************************************/ +TIC(decode_core) + silk_decode_core( psDec, &sDecCtrl, pOut, pulses ); +TOC(decode_core) + + /********************************************************/ + /* Update PLC state */ + /********************************************************/ + silk_PLC( psDec, &sDecCtrl, pOut, L, 0 ); + + psDec->lossCnt = 0; + psDec->prevSignalType = psDec->indices.signalType; + silk_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 ); + + /* A frame has been decoded without errors */ + psDec->first_frame_after_reset = 0; + } else { + /* Handle packet loss by extrapolation */ + silk_PLC( psDec, &sDecCtrl, pOut, L, 1 ); + } + + /*************************/ + /* Update output buffer. */ + /*************************/ + silk_assert( psDec->ltp_mem_length >= psDec->frame_length ); + mv_len = psDec->ltp_mem_length - psDec->frame_length; + silk_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(opus_int16) ); + silk_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( opus_int16 ) ); + + /****************************************************************/ + /* Ensure smooth connection of extrapolated and good frames */ + /****************************************************************/ + silk_PLC_glue_frames( psDec, &sDecCtrl, pOut, L ); + + /************************************************/ + /* Comfort noise generation / estimation */ + /************************************************/ + silk_CNG( psDec, &sDecCtrl, pOut, L ); + + /* Update some decoder state variables */ + psDec->lagPrev = sDecCtrl.pitchL[ psDec->nb_subfr - 1 ]; + psDec->nFramesDecoded++; + + /* Set output frame length */ + *pN = L; + +TOC(DECODE_FRAME) + + return ret; +} |