1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/silk/encode_indices.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,181 @@
1.4 +/***********************************************************************
1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
1.6 +Redistribution and use in source and binary forms, with or without
1.7 +modification, are permitted provided that the following conditions
1.8 +are met:
1.9 +- Redistributions of source code must retain the above copyright notice,
1.10 +this list of conditions and the following disclaimer.
1.11 +- Redistributions in binary form must reproduce the above copyright
1.12 +notice, this list of conditions and the following disclaimer in the
1.13 +documentation and/or other materials provided with the distribution.
1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
1.15 +names of specific contributors, may be used to endorse or promote
1.16 +products derived from this software without specific prior written
1.17 +permission.
1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 +POSSIBILITY OF SUCH DAMAGE.
1.29 +***********************************************************************/
1.30 +
1.31 +#ifdef HAVE_CONFIG_H
1.32 +#include "config.h"
1.33 +#endif
1.34 +
1.35 +#include "main.h"
1.36 +
1.37 +/* Encode side-information parameters to payload */
1.38 +void silk_encode_indices(
1.39 + silk_encoder_state *psEncC, /* I/O Encoder state */
1.40 + ec_enc *psRangeEnc, /* I/O Compressor data structure */
1.41 + opus_int FrameIndex, /* I Frame number */
1.42 + opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */
1.43 + opus_int condCoding /* I The type of conditional coding to use */
1.44 +)
1.45 +{
1.46 + opus_int i, k, typeOffset;
1.47 + opus_int encode_absolute_lagIndex, delta_lagIndex;
1.48 + opus_int16 ec_ix[ MAX_LPC_ORDER ];
1.49 + opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
1.50 + const SideInfoIndices *psIndices;
1.51 +
1.52 + if( encode_LBRR ) {
1.53 + psIndices = &psEncC->indices_LBRR[ FrameIndex ];
1.54 + } else {
1.55 + psIndices = &psEncC->indices;
1.56 + }
1.57 +
1.58 + /*******************************************/
1.59 + /* Encode signal type and quantizer offset */
1.60 + /*******************************************/
1.61 + typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
1.62 + silk_assert( typeOffset >= 0 && typeOffset < 6 );
1.63 + silk_assert( encode_LBRR == 0 || typeOffset >= 2 );
1.64 + if( encode_LBRR || typeOffset >= 2 ) {
1.65 + ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 );
1.66 + } else {
1.67 + ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 );
1.68 + }
1.69 +
1.70 + /****************/
1.71 + /* Encode gains */
1.72 + /****************/
1.73 + /* first subframe */
1.74 + if( condCoding == CODE_CONDITIONALLY ) {
1.75 + /* conditional coding */
1.76 + silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
1.77 + ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 );
1.78 + } else {
1.79 + /* independent coding, in two stages: MSB bits followed by 3 LSBs */
1.80 + silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
1.81 + ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 );
1.82 + ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 );
1.83 + }
1.84 +
1.85 + /* remaining subframes */
1.86 + for( i = 1; i < psEncC->nb_subfr; i++ ) {
1.87 + silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
1.88 + ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 );
1.89 + }
1.90 +
1.91 + /****************/
1.92 + /* Encode NLSFs */
1.93 + /****************/
1.94 + ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 );
1.95 + silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] );
1.96 + silk_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder );
1.97 + for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) {
1.98 + if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) {
1.99 + ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
1.100 + ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
1.101 + } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) {
1.102 + ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
1.103 + ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
1.104 + } else {
1.105 + ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
1.106 + }
1.107 + }
1.108 +
1.109 + /* Encode NLSF interpolation factor */
1.110 + if( psEncC->nb_subfr == MAX_NB_SUBFR ) {
1.111 + silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
1.112 + ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 );
1.113 + }
1.114 +
1.115 + if( psIndices->signalType == TYPE_VOICED )
1.116 + {
1.117 + /*********************/
1.118 + /* Encode pitch lags */
1.119 + /*********************/
1.120 + /* lag index */
1.121 + encode_absolute_lagIndex = 1;
1.122 + if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) {
1.123 + /* Delta Encoding */
1.124 + delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex;
1.125 + if( delta_lagIndex < -8 || delta_lagIndex > 11 ) {
1.126 + delta_lagIndex = 0;
1.127 + } else {
1.128 + delta_lagIndex = delta_lagIndex + 9;
1.129 + encode_absolute_lagIndex = 0; /* Only use delta */
1.130 + }
1.131 + silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 );
1.132 + ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 );
1.133 + }
1.134 + if( encode_absolute_lagIndex ) {
1.135 + /* Absolute encoding */
1.136 + opus_int32 pitch_high_bits, pitch_low_bits;
1.137 + pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
1.138 + pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
1.139 + silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
1.140 + silk_assert( pitch_high_bits < 32 );
1.141 + ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 );
1.142 + ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 );
1.143 + }
1.144 + psEncC->ec_prevLagIndex = psIndices->lagIndex;
1.145 +
1.146 + /* Countour index */
1.147 + silk_assert( psIndices->contourIndex >= 0 );
1.148 + silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) ||
1.149 + ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) ||
1.150 + ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) ||
1.151 + ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) );
1.152 + ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 );
1.153 +
1.154 + /********************/
1.155 + /* Encode LTP gains */
1.156 + /********************/
1.157 + /* PERIndex value */
1.158 + silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 );
1.159 + ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 );
1.160 +
1.161 + /* Codebook Indices */
1.162 + for( k = 0; k < psEncC->nb_subfr; k++ ) {
1.163 + silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) );
1.164 + ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 );
1.165 + }
1.166 +
1.167 + /**********************/
1.168 + /* Encode LTP scaling */
1.169 + /**********************/
1.170 + if( condCoding == CODE_INDEPENDENTLY ) {
1.171 + silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
1.172 + ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 );
1.173 + }
1.174 + silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
1.175 + }
1.176 +
1.177 + psEncC->ec_prevSignalType = psIndices->signalType;
1.178 +
1.179 + /***************/
1.180 + /* Encode seed */
1.181 + /***************/
1.182 + silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
1.183 + ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 );
1.184 +}
