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181 lines
9.1 KiB
181 lines
9.1 KiB
/*********************************************************************** |
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Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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- Neither the name of Internet Society, IETF or IETF Trust, nor the |
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names of specific contributors, may be used to endorse or promote |
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products derived from this software without specific prior written |
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permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. |
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***********************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "main.h" |
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/* Encode side-information parameters to payload */ |
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void silk_encode_indices( |
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silk_encoder_state *psEncC, /* I/O Encoder state */ |
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ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
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opus_int FrameIndex, /* I Frame number */ |
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opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ |
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opus_int condCoding /* I The type of conditional coding to use */ |
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) |
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{ |
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opus_int i, k, typeOffset; |
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opus_int encode_absolute_lagIndex, delta_lagIndex; |
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opus_int16 ec_ix[ MAX_LPC_ORDER ]; |
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opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; |
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const SideInfoIndices *psIndices; |
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if( encode_LBRR ) { |
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psIndices = &psEncC->indices_LBRR[ FrameIndex ]; |
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} else { |
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psIndices = &psEncC->indices; |
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} |
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/*******************************************/ |
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/* Encode signal type and quantizer offset */ |
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/*******************************************/ |
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typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType; |
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celt_assert( typeOffset >= 0 && typeOffset < 6 ); |
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celt_assert( encode_LBRR == 0 || typeOffset >= 2 ); |
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if( encode_LBRR || typeOffset >= 2 ) { |
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ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 ); |
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} else { |
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ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 ); |
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} |
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/****************/ |
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/* Encode gains */ |
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/****************/ |
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/* first subframe */ |
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if( condCoding == CODE_CONDITIONALLY ) { |
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/* conditional coding */ |
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silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 ); |
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} else { |
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/* independent coding, in two stages: MSB bits followed by 3 LSBs */ |
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silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN ); |
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ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 ); |
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 ); |
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} |
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/* remaining subframes */ |
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for( i = 1; i < psEncC->nb_subfr; i++ ) { |
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silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 ); |
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} |
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/****************/ |
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/* Encode NLSFs */ |
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/****************/ |
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 ); |
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silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] ); |
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celt_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder ); |
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for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) { |
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if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) { |
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ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
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} else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) { |
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ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
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ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
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} else { |
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
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} |
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} |
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/* Encode NLSF interpolation factor */ |
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if( psEncC->nb_subfr == MAX_NB_SUBFR ) { |
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silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 ); |
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ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 ); |
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} |
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if( psIndices->signalType == TYPE_VOICED ) |
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{ |
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/*********************/ |
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/* Encode pitch lags */ |
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/*********************/ |
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/* lag index */ |
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encode_absolute_lagIndex = 1; |
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if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) { |
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/* Delta Encoding */ |
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delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex; |
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if( delta_lagIndex < -8 || delta_lagIndex > 11 ) { |
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delta_lagIndex = 0; |
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} else { |
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delta_lagIndex = delta_lagIndex + 9; |
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encode_absolute_lagIndex = 0; /* Only use delta */ |
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} |
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silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 ); |
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ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 ); |
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} |
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if( encode_absolute_lagIndex ) { |
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/* Absolute encoding */ |
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opus_int32 pitch_high_bits, pitch_low_bits; |
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pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); |
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pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); |
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silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 ); |
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silk_assert( pitch_high_bits < 32 ); |
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ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 ); |
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ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 ); |
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} |
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psEncC->ec_prevLagIndex = psIndices->lagIndex; |
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/* Contour index */ |
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silk_assert( psIndices->contourIndex >= 0 ); |
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silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) || |
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( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) || |
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( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) || |
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( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) ); |
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ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 ); |
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/********************/ |
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/* Encode LTP gains */ |
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/********************/ |
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/* PERIndex value */ |
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silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 ); |
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ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 ); |
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/* Codebook Indices */ |
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for( k = 0; k < psEncC->nb_subfr; k++ ) { |
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silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) ); |
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ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 ); |
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} |
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/**********************/ |
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/* Encode LTP scaling */ |
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/**********************/ |
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if( condCoding == CODE_INDEPENDENTLY ) { |
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silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 ); |
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ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 ); |
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} |
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silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 ); |
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} |
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psEncC->ec_prevSignalType = psIndices->signalType; |
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/***************/ |
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/* Encode seed */ |
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/***************/ |
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silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 ); |
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ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 ); |
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}
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