cannam@154: /*********************************************************************** cannam@154: Copyright (c) 2006-2011, Skype Limited. All rights reserved. cannam@154: Redistribution and use in source and binary forms, with or without cannam@154: modification, are permitted provided that the following conditions cannam@154: are met: cannam@154: - Redistributions of source code must retain the above copyright notice, cannam@154: this list of conditions and the following disclaimer. cannam@154: - Redistributions in binary form must reproduce the above copyright cannam@154: notice, this list of conditions and the following disclaimer in the cannam@154: documentation and/or other materials provided with the distribution. cannam@154: - Neither the name of Internet Society, IETF or IETF Trust, nor the cannam@154: names of specific contributors, may be used to endorse or promote cannam@154: products derived from this software without specific prior written cannam@154: permission. cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE cannam@154: POSSIBILITY OF SUCH DAMAGE. cannam@154: ***********************************************************************/ cannam@154: cannam@154: #ifdef HAVE_CONFIG_H cannam@154: #include "config.h" cannam@154: #endif cannam@154: cannam@154: #include "main.h" cannam@154: #include "stack_alloc.h" cannam@154: #include "PLC.h" cannam@154: cannam@154: /****************/ cannam@154: /* Decode frame */ cannam@154: /****************/ cannam@154: opus_int silk_decode_frame( cannam@154: silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */ cannam@154: ec_dec *psRangeDec, /* I/O Compressor data structure */ cannam@154: opus_int16 pOut[], /* O Pointer to output speech frame */ cannam@154: opus_int32 *pN, /* O Pointer to size of output frame */ cannam@154: opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */ cannam@154: opus_int condCoding, /* I The type of conditional coding to use */ cannam@154: int arch /* I Run-time architecture */ cannam@154: ) cannam@154: { cannam@154: VARDECL( silk_decoder_control, psDecCtrl ); cannam@154: opus_int L, mv_len, ret = 0; cannam@154: SAVE_STACK; cannam@154: cannam@154: L = psDec->frame_length; cannam@154: ALLOC( psDecCtrl, 1, silk_decoder_control ); cannam@154: psDecCtrl->LTP_scale_Q14 = 0; cannam@154: cannam@154: /* Safety checks */ cannam@154: celt_assert( L > 0 && L <= MAX_FRAME_LENGTH ); cannam@154: cannam@154: if( lostFlag == FLAG_DECODE_NORMAL || cannam@154: ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) ) cannam@154: { cannam@154: VARDECL( opus_int16, pulses ); cannam@154: ALLOC( pulses, (L + SHELL_CODEC_FRAME_LENGTH - 1) & cannam@154: ~(SHELL_CODEC_FRAME_LENGTH - 1), opus_int16 ); cannam@154: /*********************************************/ cannam@154: /* Decode quantization indices of side info */ cannam@154: /*********************************************/ cannam@154: silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag, condCoding ); cannam@154: cannam@154: /*********************************************/ cannam@154: /* Decode quantization indices of excitation */ cannam@154: /*********************************************/ cannam@154: silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType, cannam@154: psDec->indices.quantOffsetType, psDec->frame_length ); cannam@154: cannam@154: /********************************************/ cannam@154: /* Decode parameters and pulse signal */ cannam@154: /********************************************/ cannam@154: silk_decode_parameters( psDec, psDecCtrl, condCoding ); cannam@154: cannam@154: /********************************************************/ cannam@154: /* Run inverse NSQ */ cannam@154: /********************************************************/ cannam@154: silk_decode_core( psDec, psDecCtrl, pOut, pulses, arch ); cannam@154: cannam@154: /********************************************************/ cannam@154: /* Update PLC state */ cannam@154: /********************************************************/ cannam@154: silk_PLC( psDec, psDecCtrl, pOut, 0, arch ); cannam@154: cannam@154: psDec->lossCnt = 0; cannam@154: psDec->prevSignalType = psDec->indices.signalType; cannam@154: celt_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 ); cannam@154: cannam@154: /* A frame has been decoded without errors */ cannam@154: psDec->first_frame_after_reset = 0; cannam@154: } else { cannam@154: /* Handle packet loss by extrapolation */ cannam@154: psDec->indices.signalType = psDec->prevSignalType; cannam@154: silk_PLC( psDec, psDecCtrl, pOut, 1, arch ); cannam@154: } cannam@154: cannam@154: /*************************/ cannam@154: /* Update output buffer. */ cannam@154: /*************************/ cannam@154: celt_assert( psDec->ltp_mem_length >= psDec->frame_length ); cannam@154: mv_len = psDec->ltp_mem_length - psDec->frame_length; cannam@154: silk_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(opus_int16) ); cannam@154: silk_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( opus_int16 ) ); cannam@154: cannam@154: /************************************************/ cannam@154: /* Comfort noise generation / estimation */ cannam@154: /************************************************/ cannam@154: silk_CNG( psDec, psDecCtrl, pOut, L ); cannam@154: cannam@154: /****************************************************************/ cannam@154: /* Ensure smooth connection of extrapolated and good frames */ cannam@154: /****************************************************************/ cannam@154: silk_PLC_glue_frames( psDec, pOut, L ); cannam@154: cannam@154: /* Update some decoder state variables */ cannam@154: psDec->lagPrev = psDecCtrl->pitchL[ psDec->nb_subfr - 1 ]; cannam@154: cannam@154: /* Set output frame length */ cannam@154: *pN = L; cannam@154: cannam@154: RESTORE_STACK; cannam@154: return ret; cannam@154: }