cannam@154: /*********************************************************************** cannam@154: Copyright (c) 2006-2011, Skype Limited. All rights reserved. cannam@154: Redistribution and use in source and binary forms, with or without cannam@154: modification, are permitted provided that the following conditions cannam@154: are met: cannam@154: - Redistributions of source code must retain the above copyright notice, cannam@154: this list of conditions and the following disclaimer. cannam@154: - Redistributions in binary form must reproduce the above copyright cannam@154: notice, this list of conditions and the following disclaimer in the cannam@154: documentation and/or other materials provided with the distribution. cannam@154: - Neither the name of Internet Society, IETF or IETF Trust, nor the cannam@154: names of specific contributors, may be used to endorse or promote cannam@154: products derived from this software without specific prior written cannam@154: permission. cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE cannam@154: POSSIBILITY OF SUCH DAMAGE. cannam@154: ***********************************************************************/ cannam@154: cannam@154: #ifdef HAVE_CONFIG_H cannam@154: #include "config.h" cannam@154: #endif cannam@154: cannam@154: #include "main.h" cannam@154: cannam@154: /* Encode side-information parameters to payload */ cannam@154: void silk_encode_indices( cannam@154: silk_encoder_state *psEncC, /* I/O Encoder state */ cannam@154: ec_enc *psRangeEnc, /* I/O Compressor data structure */ cannam@154: opus_int FrameIndex, /* I Frame number */ cannam@154: opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ cannam@154: opus_int condCoding /* I The type of conditional coding to use */ cannam@154: ) cannam@154: { cannam@154: opus_int i, k, typeOffset; cannam@154: opus_int encode_absolute_lagIndex, delta_lagIndex; cannam@154: opus_int16 ec_ix[ MAX_LPC_ORDER ]; cannam@154: opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; cannam@154: const SideInfoIndices *psIndices; cannam@154: cannam@154: if( encode_LBRR ) { cannam@154: psIndices = &psEncC->indices_LBRR[ FrameIndex ]; cannam@154: } else { cannam@154: psIndices = &psEncC->indices; cannam@154: } cannam@154: cannam@154: /*******************************************/ cannam@154: /* Encode signal type and quantizer offset */ cannam@154: /*******************************************/ cannam@154: typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType; cannam@154: celt_assert( typeOffset >= 0 && typeOffset < 6 ); cannam@154: celt_assert( encode_LBRR == 0 || typeOffset >= 2 ); cannam@154: if( encode_LBRR || typeOffset >= 2 ) { cannam@154: ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 ); cannam@154: } else { cannam@154: ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 ); cannam@154: } cannam@154: cannam@154: /****************/ cannam@154: /* Encode gains */ cannam@154: /****************/ cannam@154: /* first subframe */ cannam@154: if( condCoding == CODE_CONDITIONALLY ) { cannam@154: /* conditional coding */ cannam@154: silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 ); cannam@154: } else { cannam@154: /* independent coding, in two stages: MSB bits followed by 3 LSBs */ cannam@154: silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN ); cannam@154: ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 ); cannam@154: } cannam@154: cannam@154: /* remaining subframes */ cannam@154: for( i = 1; i < psEncC->nb_subfr; i++ ) { cannam@154: silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 ); cannam@154: } cannam@154: cannam@154: /****************/ cannam@154: /* Encode NLSFs */ cannam@154: /****************/ cannam@154: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 ); cannam@154: silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] ); cannam@154: celt_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder ); cannam@154: for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) { cannam@154: if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) { cannam@154: ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); cannam@154: } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) { cannam@154: ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); cannam@154: ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); cannam@154: } else { cannam@154: ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); cannam@154: } cannam@154: } cannam@154: cannam@154: /* Encode NLSF interpolation factor */ cannam@154: if( psEncC->nb_subfr == MAX_NB_SUBFR ) { cannam@154: silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 ); cannam@154: } cannam@154: cannam@154: if( psIndices->signalType == TYPE_VOICED ) cannam@154: { cannam@154: /*********************/ cannam@154: /* Encode pitch lags */ cannam@154: /*********************/ cannam@154: /* lag index */ cannam@154: encode_absolute_lagIndex = 1; cannam@154: if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) { cannam@154: /* Delta Encoding */ cannam@154: delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex; cannam@154: if( delta_lagIndex < -8 || delta_lagIndex > 11 ) { cannam@154: delta_lagIndex = 0; cannam@154: } else { cannam@154: delta_lagIndex = delta_lagIndex + 9; cannam@154: encode_absolute_lagIndex = 0; /* Only use delta */ cannam@154: } cannam@154: silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 ); cannam@154: ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 ); cannam@154: } cannam@154: if( encode_absolute_lagIndex ) { cannam@154: /* Absolute encoding */ cannam@154: opus_int32 pitch_high_bits, pitch_low_bits; cannam@154: pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); cannam@154: pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); cannam@154: silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 ); cannam@154: silk_assert( pitch_high_bits < 32 ); cannam@154: ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 ); cannam@154: ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 ); cannam@154: } cannam@154: psEncC->ec_prevLagIndex = psIndices->lagIndex; cannam@154: cannam@154: /* Countour index */ cannam@154: silk_assert( psIndices->contourIndex >= 0 ); cannam@154: silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) || cannam@154: ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) || cannam@154: ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) || cannam@154: ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 ); cannam@154: cannam@154: /********************/ cannam@154: /* Encode LTP gains */ cannam@154: /********************/ cannam@154: /* PERIndex value */ cannam@154: silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 ); cannam@154: cannam@154: /* Codebook Indices */ cannam@154: for( k = 0; k < psEncC->nb_subfr; k++ ) { cannam@154: silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 ); cannam@154: } cannam@154: cannam@154: /**********************/ cannam@154: /* Encode LTP scaling */ cannam@154: /**********************/ cannam@154: if( condCoding == CODE_INDEPENDENTLY ) { cannam@154: silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 ); cannam@154: } cannam@154: silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 ); cannam@154: } cannam@154: cannam@154: psEncC->ec_prevSignalType = psIndices->signalType; cannam@154: cannam@154: /***************/ cannam@154: /* Encode seed */ cannam@154: /***************/ cannam@154: silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 ); cannam@154: ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 ); cannam@154: }