| /*********************************************************************** |
| Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| Redistribution and use in source and binary forms, with or without |
| modification, (subject to the limitations in the disclaimer below) |
| are permitted provided that the following conditions are met: |
| - Redistributions of source code must retain the above copyright notice, |
| this list of conditions and the following disclaimer. |
| - Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| - Neither the name of Skype Limited, nor the names of specific |
| contributors, may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED |
| BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, |
| BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| ***********************************************************************/ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "silk_main.h" |
| |
| /* Encode side-information parameters to payload */ |
| void silk_encode_indices( |
| silk_encoder_state *psEncC, /* I/O Encoder state */ |
| ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| opus_int FrameIndex, /* I Frame number */ |
| opus_int encode_LBRR /* I Flag indicating LBRR data is being encoded */ |
| ) |
| { |
| opus_int i, k, condCoding, typeOffset; |
| opus_int encode_absolute_lagIndex, delta_lagIndex; |
| opus_int16 ec_ix[ MAX_LPC_ORDER ]; |
| opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; |
| const SideInfoIndices *psIndices; |
| #if SAVE_ALL_INTERNAL_DATA |
| opus_int nBytes_lagIndex, nBytes_contourIndex, nBytes_LTP; |
| opus_int nBytes_after, nBytes_before; |
| #endif |
| |
| /* Use conditional coding if previous frame available */ |
| if( FrameIndex > 0 && ( encode_LBRR == 0 || psEncC->LBRR_flags[ FrameIndex - 1 ] == 1 ) ) { |
| condCoding = 1; |
| } else { |
| condCoding = 0; |
| } |
| |
| if( encode_LBRR ) { |
| psIndices = &psEncC->indices_LBRR[ FrameIndex ]; |
| } else { |
| psIndices = &psEncC->indices; |
| } |
| |
| /*******************************************/ |
| /* Encode signal type and quantizer offset */ |
| /*******************************************/ |
| typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType; |
| SKP_assert( typeOffset >= 0 && typeOffset < 6 ); |
| SKP_assert( encode_LBRR == 0 || typeOffset >= 2 ); |
| if( encode_LBRR || typeOffset >= 2 ) { |
| ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 ); |
| } else { |
| ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 ); |
| } |
| |
| /****************/ |
| /* Encode gains */ |
| /****************/ |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| /* first subframe */ |
| if( condCoding ) { |
| /* conditional coding */ |
| SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
| ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 ); |
| } else { |
| /* independent coding, in two stages: MSB bits followed by 3 LSBs */ |
| SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN ); |
| ec_enc_icdf( psRangeEnc, SKP_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 ); |
| ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 ); |
| } |
| |
| /* remaining subframes */ |
| for( i = 1; i < psEncC->nb_subfr; i++ ) { |
| SKP_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
| ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 ); |
| } |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| nBytes_after -= nBytes_before; // bytes just added |
| DEBUG_STORE_DATA( nBytes_gains.dat, &nBytes_after, sizeof( opus_int ) ); |
| #endif |
| |
| /****************/ |
| /* Encode NLSFs */ |
| /****************/ |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 ); |
| silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] ); |
| SKP_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder ); |
| for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) { |
| if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) { |
| ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
| } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) { |
| ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
| } else { |
| ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| } |
| } |
| |
| /* Encode NLSF interpolation factor */ |
| if( psEncC->nb_subfr == MAX_NB_SUBFR ) { |
| SKP_assert( psEncC->useInterpolatedNLSFs == 1 || psIndices->NLSFInterpCoef_Q2 == ( 1 << 2 ) ); |
| SKP_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 ); |
| ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 ); |
| } |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| DEBUG_STORE_DATA( lsf_interpol.dat, &psIndices->NLSFInterpCoef_Q2, sizeof(int) ); |
| nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| nBytes_after -= nBytes_before; // bytes just added |
| DEBUG_STORE_DATA( nBytes_LSF.dat, &nBytes_after, sizeof( opus_int ) ); |
| #endif |
| |
| if( psIndices->signalType == TYPE_VOICED ) |
| { |
| /*********************/ |
| /* Encode pitch lags */ |
| /*********************/ |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| /* lag index */ |
| encode_absolute_lagIndex = 1; |
| if( condCoding && psEncC->ec_prevSignalType == TYPE_VOICED ) { |
| /* Delta Encoding */ |
| delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex; |
| if( delta_lagIndex < -8 || delta_lagIndex > 11 ) { |
| delta_lagIndex = 0; |
| } else { |
| delta_lagIndex = delta_lagIndex + 9; |
| encode_absolute_lagIndex = 0; /* Only use delta */ |
| } |
| SKP_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 ); |
| ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 ); |
| } |
| if( encode_absolute_lagIndex ) { |
| /* Absolute encoding */ |
| opus_int32 pitch_high_bits, pitch_low_bits; |
| pitch_high_bits = SKP_DIV32_16( psIndices->lagIndex, SKP_RSHIFT( psEncC->fs_kHz, 1 ) ); |
| pitch_low_bits = psIndices->lagIndex - SKP_SMULBB( pitch_high_bits, SKP_RSHIFT( psEncC->fs_kHz, 1 ) ); |
| SKP_assert( pitch_low_bits < psEncC->fs_kHz / 2 ); |
| SKP_assert( pitch_high_bits < 32 ); |
| ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 ); |
| ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 ); |
| } |
| psEncC->ec_prevLagIndex = psIndices->lagIndex; |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| nBytes_lagIndex = nBytes_after - nBytes_before; // bytes just added |
| #endif |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| /* Countour index */ |
| SKP_assert( psIndices->contourIndex >= 0 ); |
| SKP_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) || |
| ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) || |
| ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) || |
| ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) ); |
| ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 ); |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| nBytes_contourIndex = nBytes_after - nBytes_before; // bytes just added |
| #endif |
| |
| /********************/ |
| /* Encode LTP gains */ |
| /********************/ |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| |
| /* PERIndex value */ |
| SKP_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 ); |
| ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 ); |
| |
| /* Codebook Indices */ |
| for( k = 0; k < psEncC->nb_subfr; k++ ) { |
| SKP_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) ); |
| ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 ); |
| } |
| |
| /**********************/ |
| /* Encode LTP scaling */ |
| /**********************/ |
| if( !condCoding ) { |
| SKP_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 ); |
| ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 ); |
| } |
| SKP_assert( !condCoding || psIndices->LTP_scaleIndex == 0 ); |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| nBytes_LTP = nBytes_after - nBytes_before; // bytes just added |
| #endif |
| } |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| else { |
| // Unvoiced speech |
| nBytes_lagIndex = 0; |
| nBytes_contourIndex = 0; |
| nBytes_LTP = 0; |
| } |
| DEBUG_STORE_DATA( nBytes_lagIndex.dat, &nBytes_lagIndex, sizeof( opus_int ) ); |
| DEBUG_STORE_DATA( nBytes_contourIndex.dat, &nBytes_contourIndex, sizeof( opus_int ) ); |
| DEBUG_STORE_DATA( nBytes_LTP.dat, &nBytes_LTP, sizeof( opus_int ) ); |
| #endif |
| |
| psEncC->ec_prevSignalType = psIndices->signalType; |
| |
| #ifdef SAVE_ALL_INTERNAL_DATA |
| nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); |
| #endif |
| |
| /***************/ |
| /* Encode seed */ |
| /***************/ |
| SKP_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 ); |
| ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 ); |
| } |