1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************************************************************** 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCopyright (c) 2006-2011, Skype Limited. All rights reserved. 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgRedistribution and use in source and binary forms, with or without 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgmodification, are permitted provided that the following conditions 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgare met: 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions of source code must retain the above copyright notice, 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgthis list of conditions and the following disclaimer. 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions in binary form must reproduce the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnotice, this list of conditions and the following disclaimer in the 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgdocumentation and/or other materials provided with the distribution. 11e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org- Neither the name of Internet Society, IETF or IETF Trust, nor the 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnames of specific contributors, may be used to endorse or promote 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgproducts derived from this software without specific prior written 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgpermission. 15e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgLIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgPOSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org***********************************************************************/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "main.h" 33885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Decode side-information parameters from payload */ 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_decode_indices( 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_state *psDec, /* I/O State */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ec_dec *psRangeDec, /* I/O Compressor data structure */ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int FrameIndex, /* I Frame number */ 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */ 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int condCoding /* I The type of conditional coding to use */ 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, k, Ix; 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int decode_absolute_lagIndex, delta_lagIndex; 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 ec_ix[ MAX_LPC_ORDER ]; 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*******************************************/ 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode signal type and quantizer offset */ 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*******************************************/ 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decode_LBRR || psDec->VAD_flags[ FrameIndex ] ) { 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Ix = ec_dec_icdf( psRangeDec, silk_type_offset_VAD_iCDF, 8 ) + 2; 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Ix = ec_dec_icdf( psRangeDec, silk_type_offset_no_VAD_iCDF, 8 ); 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.signalType = (opus_int8)silk_RSHIFT( Ix, 1 ); 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.quantOffsetType = (opus_int8)( Ix & 1 ); 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************/ 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode gains */ 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************/ 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* First subframe */ 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( condCoding == CODE_CONDITIONALLY ) { 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Conditional coding */ 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.GainsIndices[ 0 ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_delta_gain_iCDF, 8 ); 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Independent coding, in two stages: MSB bits followed by 3 LSBs */ 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.GainsIndices[ 0 ] = (opus_int8)silk_LSHIFT( ec_dec_icdf( psRangeDec, silk_gain_iCDF[ psDec->indices.signalType ], 8 ), 3 ); 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.GainsIndices[ 0 ] += (opus_int8)ec_dec_icdf( psRangeDec, silk_uniform8_iCDF, 8 ); 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Remaining subframes */ 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 1; i < psDec->nb_subfr; i++ ) { 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.GainsIndices[ i ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_delta_gain_iCDF, 8 ); 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************/ 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode LSF Indices */ 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************/ 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.NLSFIndices[ 0 ] = (opus_int8)ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->CB1_iCDF[ ( psDec->indices.signalType >> 1 ) * psDec->psNLSF_CB->nVectors ], 8 ); 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_NLSF_unpack( ec_ix, pred_Q8, psDec->psNLSF_CB, psDec->indices.NLSFIndices[ 0 ] ); 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( psDec->psNLSF_CB->order == psDec->LPC_order ); 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < psDec->psNLSF_CB->order; i++ ) { 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Ix = ec_dec_icdf( psRangeDec, &psDec->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( Ix == 0 ) { 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Ix -= ec_dec_icdf( psRangeDec, silk_NLSF_EXT_iCDF, 8 ); 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( Ix == 2 * NLSF_QUANT_MAX_AMPLITUDE ) { 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Ix += ec_dec_icdf( psRangeDec, silk_NLSF_EXT_iCDF, 8 ); 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.NLSFIndices[ i+1 ] = (opus_int8)( Ix - NLSF_QUANT_MAX_AMPLITUDE ); 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode LSF interpolation factor */ 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->nb_subfr == MAX_NB_SUBFR ) { 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.NLSFInterpCoef_Q2 = (opus_int8)ec_dec_icdf( psRangeDec, silk_NLSF_interpolation_factor_iCDF, 8 ); 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.NLSFInterpCoef_Q2 = 4; 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->indices.signalType == TYPE_VOICED ) 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*********************/ 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode pitch lags */ 104885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*********************/ 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Get lag index */ 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org decode_absolute_lagIndex = 1; 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( condCoding == CODE_CONDITIONALLY && psDec->ec_prevSignalType == TYPE_VOICED ) { 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode Delta index */ 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org delta_lagIndex = (opus_int16)ec_dec_icdf( psRangeDec, silk_pitch_delta_iCDF, 8 ); 110885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( delta_lagIndex > 0 ) { 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org delta_lagIndex = delta_lagIndex - 9; 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.lagIndex = (opus_int16)( psDec->ec_prevLagIndex + delta_lagIndex ); 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org decode_absolute_lagIndex = 0; 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 116885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decode_absolute_lagIndex ) { 117885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Absolute decoding */ 118885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.lagIndex = (opus_int16)ec_dec_icdf( psRangeDec, silk_pitch_lag_iCDF, 8 ) * silk_RSHIFT( psDec->fs_kHz, 1 ); 119885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.lagIndex += (opus_int16)ec_dec_icdf( psRangeDec, psDec->pitch_lag_low_bits_iCDF, 8 ); 120885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 121885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->ec_prevLagIndex = psDec->indices.lagIndex; 122885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 123885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Get countour index */ 124885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.contourIndex = (opus_int8)ec_dec_icdf( psRangeDec, psDec->pitch_contour_iCDF, 8 ); 125885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 126885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /********************/ 127885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode LTP gains */ 128885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /********************/ 129885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode PERIndex value */ 130885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.PERIndex = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTP_per_index_iCDF, 8 ); 131885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 132885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psDec->nb_subfr; k++ ) { 133885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.LTPIndex[ k ] = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTP_gain_iCDF_ptrs[ psDec->indices.PERIndex ], 8 ); 134885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 135885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 136885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************/ 137885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode LTP scaling */ 138885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************/ 139885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( condCoding == CODE_INDEPENDENTLY ) { 140885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.LTP_scaleIndex = (opus_int8)ec_dec_icdf( psRangeDec, silk_LTPscale_iCDF, 8 ); 141885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 142885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.LTP_scaleIndex = 0; 143885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 144885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 145885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->ec_prevSignalType = psDec->indices.signalType; 146885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 147885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /***************/ 148885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode seed */ 149885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /***************/ 150885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.Seed = (opus_int8)ec_dec_icdf( psRangeDec, silk_uniform4_iCDF, 8 ); 151885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 152