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annotate src/opus-1.3/silk/decode_frame.c @ 73:02caadb7509e

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Rebuild with --disable-stack-protector for mingw32
author Chris Cannam
date Fri, 25 Jan 2019 14:31:07 +0000
parents 7aeed7906520
children
rev   line source
Chris@69 1 /***********************************************************************
Chris@69 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Chris@69 3 Redistribution and use in source and binary forms, with or without
Chris@69 4 modification, are permitted provided that the following conditions
Chris@69 5 are met:
Chris@69 6 - Redistributions of source code must retain the above copyright notice,
Chris@69 7 this list of conditions and the following disclaimer.
Chris@69 8 - Redistributions in binary form must reproduce the above copyright
Chris@69 9 notice, this list of conditions and the following disclaimer in the
Chris@69 10 documentation and/or other materials provided with the distribution.
Chris@69 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
Chris@69 12 names of specific contributors, may be used to endorse or promote
Chris@69 13 products derived from this software without specific prior written
Chris@69 14 permission.
Chris@69 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Chris@69 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Chris@69 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Chris@69 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
Chris@69 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
Chris@69 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
Chris@69 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Chris@69 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Chris@69 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
Chris@69 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Chris@69 25 POSSIBILITY OF SUCH DAMAGE.
Chris@69 26 ***********************************************************************/
Chris@69 27
Chris@69 28 #ifdef HAVE_CONFIG_H
Chris@69 29 #include "config.h"
Chris@69 30 #endif
Chris@69 31
Chris@69 32 #include "main.h"
Chris@69 33 #include "stack_alloc.h"
Chris@69 34 #include "PLC.h"
Chris@69 35
Chris@69 36 /****************/
Chris@69 37 /* Decode frame */
Chris@69 38 /****************/
Chris@69 39 opus_int silk_decode_frame(
Chris@69 40 silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
Chris@69 41 ec_dec *psRangeDec, /* I/O Compressor data structure */
Chris@69 42 opus_int16 pOut[], /* O Pointer to output speech frame */
Chris@69 43 opus_int32 *pN, /* O Pointer to size of output frame */
Chris@69 44 opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */
Chris@69 45 opus_int condCoding, /* I The type of conditional coding to use */
Chris@69 46 int arch /* I Run-time architecture */
Chris@69 47 )
Chris@69 48 {
Chris@69 49 VARDECL( silk_decoder_control, psDecCtrl );
Chris@69 50 opus_int L, mv_len, ret = 0;
Chris@69 51 SAVE_STACK;
Chris@69 52
Chris@69 53 L = psDec->frame_length;
Chris@69 54 ALLOC( psDecCtrl, 1, silk_decoder_control );
Chris@69 55 psDecCtrl->LTP_scale_Q14 = 0;
Chris@69 56
Chris@69 57 /* Safety checks */
Chris@69 58 celt_assert( L > 0 && L <= MAX_FRAME_LENGTH );
Chris@69 59
Chris@69 60 if( lostFlag == FLAG_DECODE_NORMAL ||
Chris@69 61 ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) )
Chris@69 62 {
Chris@69 63 VARDECL( opus_int16, pulses );
Chris@69 64 ALLOC( pulses, (L + SHELL_CODEC_FRAME_LENGTH - 1) &
Chris@69 65 ~(SHELL_CODEC_FRAME_LENGTH - 1), opus_int16 );
Chris@69 66 /*********************************************/
Chris@69 67 /* Decode quantization indices of side info */
Chris@69 68 /*********************************************/
Chris@69 69 silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag, condCoding );
Chris@69 70
Chris@69 71 /*********************************************/
Chris@69 72 /* Decode quantization indices of excitation */
Chris@69 73 /*********************************************/
Chris@69 74 silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType,
Chris@69 75 psDec->indices.quantOffsetType, psDec->frame_length );
Chris@69 76
Chris@69 77 /********************************************/
Chris@69 78 /* Decode parameters and pulse signal */
Chris@69 79 /********************************************/
Chris@69 80 silk_decode_parameters( psDec, psDecCtrl, condCoding );
Chris@69 81
Chris@69 82 /********************************************************/
Chris@69 83 /* Run inverse NSQ */
Chris@69 84 /********************************************************/
Chris@69 85 silk_decode_core( psDec, psDecCtrl, pOut, pulses, arch );
Chris@69 86
Chris@69 87 /********************************************************/
Chris@69 88 /* Update PLC state */
Chris@69 89 /********************************************************/
Chris@69 90 silk_PLC( psDec, psDecCtrl, pOut, 0, arch );
Chris@69 91
Chris@69 92 psDec->lossCnt = 0;
Chris@69 93 psDec->prevSignalType = psDec->indices.signalType;
Chris@69 94 celt_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 );
Chris@69 95
Chris@69 96 /* A frame has been decoded without errors */
Chris@69 97 psDec->first_frame_after_reset = 0;
Chris@69 98 } else {
Chris@69 99 /* Handle packet loss by extrapolation */
Chris@69 100 psDec->indices.signalType = psDec->prevSignalType;
Chris@69 101 silk_PLC( psDec, psDecCtrl, pOut, 1, arch );
Chris@69 102 }
Chris@69 103
Chris@69 104 /*************************/
Chris@69 105 /* Update output buffer. */
Chris@69 106 /*************************/
Chris@69 107 celt_assert( psDec->ltp_mem_length >= psDec->frame_length );
Chris@69 108 mv_len = psDec->ltp_mem_length - psDec->frame_length;
Chris@69 109 silk_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(opus_int16) );
Chris@69 110 silk_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( opus_int16 ) );
Chris@69 111
Chris@69 112 /************************************************/
Chris@69 113 /* Comfort noise generation / estimation */
Chris@69 114 /************************************************/
Chris@69 115 silk_CNG( psDec, psDecCtrl, pOut, L );
Chris@69 116
Chris@69 117 /****************************************************************/
Chris@69 118 /* Ensure smooth connection of extrapolated and good frames */
Chris@69 119 /****************************************************************/
Chris@69 120 silk_PLC_glue_frames( psDec, pOut, L );
Chris@69 121
Chris@69 122 /* Update some decoder state variables */
Chris@69 123 psDec->lagPrev = psDecCtrl->pitchL[ psDec->nb_subfr - 1 ];
Chris@69 124
Chris@69 125 /* Set output frame length */
Chris@69 126 *pN = L;
Chris@69 127
Chris@69 128 RESTORE_STACK;
Chris@69 129 return ret;
Chris@69 130 }