Chris@69: /*********************************************************************** Chris@69: Copyright (c) 2006-2011, Skype Limited. All rights reserved. Chris@69: Redistribution and use in source and binary forms, with or without Chris@69: modification, are permitted provided that the following conditions Chris@69: are met: Chris@69: - Redistributions of source code must retain the above copyright notice, Chris@69: this list of conditions and the following disclaimer. Chris@69: - Redistributions in binary form must reproduce the above copyright Chris@69: notice, this list of conditions and the following disclaimer in the Chris@69: documentation and/or other materials provided with the distribution. Chris@69: - Neither the name of Internet Society, IETF or IETF Trust, nor the Chris@69: names of specific contributors, may be used to endorse or promote Chris@69: products derived from this software without specific prior written Chris@69: permission. Chris@69: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" Chris@69: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE Chris@69: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Chris@69: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE Chris@69: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR Chris@69: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF Chris@69: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS Chris@69: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN Chris@69: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) Chris@69: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE Chris@69: POSSIBILITY OF SUCH DAMAGE. Chris@69: ***********************************************************************/ Chris@69: Chris@69: #ifdef HAVE_CONFIG_H Chris@69: #include "config.h" Chris@69: #endif Chris@69: Chris@69: #include "main.h" Chris@69: Chris@69: /* Encode side-information parameters to payload */ Chris@69: void silk_encode_indices( Chris@69: silk_encoder_state *psEncC, /* I/O Encoder state */ Chris@69: ec_enc *psRangeEnc, /* I/O Compressor data structure */ Chris@69: opus_int FrameIndex, /* I Frame number */ Chris@69: opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ Chris@69: opus_int condCoding /* I The type of conditional coding to use */ Chris@69: ) Chris@69: { Chris@69: opus_int i, k, typeOffset; Chris@69: opus_int encode_absolute_lagIndex, delta_lagIndex; Chris@69: opus_int16 ec_ix[ MAX_LPC_ORDER ]; Chris@69: opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; Chris@69: const SideInfoIndices *psIndices; Chris@69: Chris@69: if( encode_LBRR ) { Chris@69: psIndices = &psEncC->indices_LBRR[ FrameIndex ]; Chris@69: } else { Chris@69: psIndices = &psEncC->indices; Chris@69: } Chris@69: Chris@69: /*******************************************/ Chris@69: /* Encode signal type and quantizer offset */ Chris@69: /*******************************************/ Chris@69: typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType; Chris@69: celt_assert( typeOffset >= 0 && typeOffset < 6 ); Chris@69: celt_assert( encode_LBRR == 0 || typeOffset >= 2 ); Chris@69: if( encode_LBRR || typeOffset >= 2 ) { Chris@69: ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 ); Chris@69: } else { Chris@69: ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 ); Chris@69: } Chris@69: Chris@69: /****************/ Chris@69: /* Encode gains */ Chris@69: /****************/ Chris@69: /* first subframe */ Chris@69: if( condCoding == CODE_CONDITIONALLY ) { Chris@69: /* conditional coding */ Chris@69: silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 ); Chris@69: } else { Chris@69: /* independent coding, in two stages: MSB bits followed by 3 LSBs */ Chris@69: silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN ); Chris@69: ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 ); Chris@69: } Chris@69: Chris@69: /* remaining subframes */ Chris@69: for( i = 1; i < psEncC->nb_subfr; i++ ) { Chris@69: silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 ); Chris@69: } Chris@69: Chris@69: /****************/ Chris@69: /* Encode NLSFs */ Chris@69: /****************/ Chris@69: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 ); Chris@69: silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] ); Chris@69: celt_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder ); Chris@69: for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) { Chris@69: if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) { Chris@69: ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); Chris@69: } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) { Chris@69: ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); Chris@69: ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); Chris@69: } else { Chris@69: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); Chris@69: } Chris@69: } Chris@69: Chris@69: /* Encode NLSF interpolation factor */ Chris@69: if( psEncC->nb_subfr == MAX_NB_SUBFR ) { Chris@69: silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 ); Chris@69: } Chris@69: Chris@69: if( psIndices->signalType == TYPE_VOICED ) Chris@69: { Chris@69: /*********************/ Chris@69: /* Encode pitch lags */ Chris@69: /*********************/ Chris@69: /* lag index */ Chris@69: encode_absolute_lagIndex = 1; Chris@69: if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) { Chris@69: /* Delta Encoding */ Chris@69: delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex; Chris@69: if( delta_lagIndex < -8 || delta_lagIndex > 11 ) { Chris@69: delta_lagIndex = 0; Chris@69: } else { Chris@69: delta_lagIndex = delta_lagIndex + 9; Chris@69: encode_absolute_lagIndex = 0; /* Only use delta */ Chris@69: } Chris@69: silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 ); Chris@69: ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 ); Chris@69: } Chris@69: if( encode_absolute_lagIndex ) { Chris@69: /* Absolute encoding */ Chris@69: opus_int32 pitch_high_bits, pitch_low_bits; Chris@69: pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); Chris@69: pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); Chris@69: silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 ); Chris@69: silk_assert( pitch_high_bits < 32 ); Chris@69: ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 ); Chris@69: ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 ); Chris@69: } Chris@69: psEncC->ec_prevLagIndex = psIndices->lagIndex; Chris@69: Chris@69: /* Countour index */ Chris@69: silk_assert( psIndices->contourIndex >= 0 ); Chris@69: silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) || Chris@69: ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) || Chris@69: ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) || Chris@69: ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 ); Chris@69: Chris@69: /********************/ Chris@69: /* Encode LTP gains */ Chris@69: /********************/ Chris@69: /* PERIndex value */ Chris@69: silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 ); Chris@69: Chris@69: /* Codebook Indices */ Chris@69: for( k = 0; k < psEncC->nb_subfr; k++ ) { Chris@69: silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 ); Chris@69: } Chris@69: Chris@69: /**********************/ Chris@69: /* Encode LTP scaling */ Chris@69: /**********************/ Chris@69: if( condCoding == CODE_INDEPENDENTLY ) { Chris@69: silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 ); Chris@69: } Chris@69: silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 ); Chris@69: } Chris@69: Chris@69: psEncC->ec_prevSignalType = psIndices->signalType; Chris@69: Chris@69: /***************/ Chris@69: /* Encode seed */ Chris@69: /***************/ Chris@69: silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 ); Chris@69: ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 ); Chris@69: }