Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions |
| 5 | are met: |
| 6 | - Redistributions of source code must retain the above copyright notice, |
| 7 | this list of conditions and the following disclaimer. |
| 8 | - Redistributions in binary form must reproduce the above copyright |
| 9 | notice, this list of conditions and the following disclaimer in the |
| 10 | documentation and/or other materials provided with the distribution. |
Alexandre Lision | 8538238 | 2014-01-27 15:54:16 -0500 | [diff] [blame] | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 12 | names of specific contributors, may be used to endorse or promote |
| 13 | products derived from this software without specific prior written |
| 14 | permission. |
Alexandre Lision | 8538238 | 2014-01-27 15:54:16 -0500 | [diff] [blame] | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | POSSIBILITY OF SUCH DAMAGE. |
| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "main.h" |
| 33 | |
| 34 | /* Encode side-information parameters to payload */ |
| 35 | void silk_encode_indices( |
| 36 | silk_encoder_state *psEncC, /* I/O Encoder state */ |
| 37 | ec_enc *psRangeEnc, /* I/O Compressor data structure */ |
| 38 | opus_int FrameIndex, /* I Frame number */ |
| 39 | opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */ |
| 40 | opus_int condCoding /* I The type of conditional coding to use */ |
| 41 | ) |
| 42 | { |
| 43 | opus_int i, k, typeOffset; |
| 44 | opus_int encode_absolute_lagIndex, delta_lagIndex; |
| 45 | opus_int16 ec_ix[ MAX_LPC_ORDER ]; |
| 46 | opus_uint8 pred_Q8[ MAX_LPC_ORDER ]; |
| 47 | const SideInfoIndices *psIndices; |
| 48 | |
| 49 | if( encode_LBRR ) { |
| 50 | psIndices = &psEncC->indices_LBRR[ FrameIndex ]; |
| 51 | } else { |
| 52 | psIndices = &psEncC->indices; |
| 53 | } |
| 54 | |
| 55 | /*******************************************/ |
| 56 | /* Encode signal type and quantizer offset */ |
| 57 | /*******************************************/ |
| 58 | typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType; |
| 59 | silk_assert( typeOffset >= 0 && typeOffset < 6 ); |
| 60 | silk_assert( encode_LBRR == 0 || typeOffset >= 2 ); |
| 61 | if( encode_LBRR || typeOffset >= 2 ) { |
| 62 | ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 ); |
| 63 | } else { |
| 64 | ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 ); |
| 65 | } |
| 66 | |
| 67 | /****************/ |
| 68 | /* Encode gains */ |
| 69 | /****************/ |
| 70 | /* first subframe */ |
| 71 | if( condCoding == CODE_CONDITIONALLY ) { |
| 72 | /* conditional coding */ |
| 73 | silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
| 74 | ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 ); |
| 75 | } else { |
| 76 | /* independent coding, in two stages: MSB bits followed by 3 LSBs */ |
| 77 | silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN ); |
| 78 | ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 ); |
| 79 | ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 ); |
| 80 | } |
| 81 | |
| 82 | /* remaining subframes */ |
| 83 | for( i = 1; i < psEncC->nb_subfr; i++ ) { |
| 84 | silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 ); |
| 85 | ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 ); |
| 86 | } |
| 87 | |
| 88 | /****************/ |
| 89 | /* Encode NLSFs */ |
| 90 | /****************/ |
| 91 | ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 ); |
| 92 | silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] ); |
| 93 | silk_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder ); |
| 94 | for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) { |
| 95 | if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) { |
| 96 | ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| 97 | ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
| 98 | } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) { |
| 99 | ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| 100 | ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 ); |
| 101 | } else { |
| 102 | ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 ); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* Encode NLSF interpolation factor */ |
| 107 | if( psEncC->nb_subfr == MAX_NB_SUBFR ) { |
| 108 | silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 ); |
| 109 | ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 ); |
| 110 | } |
| 111 | |
| 112 | if( psIndices->signalType == TYPE_VOICED ) |
| 113 | { |
| 114 | /*********************/ |
| 115 | /* Encode pitch lags */ |
| 116 | /*********************/ |
| 117 | /* lag index */ |
| 118 | encode_absolute_lagIndex = 1; |
| 119 | if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) { |
| 120 | /* Delta Encoding */ |
| 121 | delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex; |
| 122 | if( delta_lagIndex < -8 || delta_lagIndex > 11 ) { |
| 123 | delta_lagIndex = 0; |
| 124 | } else { |
| 125 | delta_lagIndex = delta_lagIndex + 9; |
| 126 | encode_absolute_lagIndex = 0; /* Only use delta */ |
| 127 | } |
| 128 | silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 ); |
| 129 | ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 ); |
| 130 | } |
| 131 | if( encode_absolute_lagIndex ) { |
| 132 | /* Absolute encoding */ |
| 133 | opus_int32 pitch_high_bits, pitch_low_bits; |
| 134 | pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); |
| 135 | pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) ); |
| 136 | silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 ); |
| 137 | silk_assert( pitch_high_bits < 32 ); |
| 138 | ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 ); |
| 139 | ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 ); |
| 140 | } |
| 141 | psEncC->ec_prevLagIndex = psIndices->lagIndex; |
| 142 | |
| 143 | /* Countour index */ |
| 144 | silk_assert( psIndices->contourIndex >= 0 ); |
| 145 | silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) || |
| 146 | ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) || |
| 147 | ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) || |
| 148 | ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) ); |
| 149 | ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 ); |
| 150 | |
| 151 | /********************/ |
| 152 | /* Encode LTP gains */ |
| 153 | /********************/ |
| 154 | /* PERIndex value */ |
| 155 | silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 ); |
| 156 | ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 ); |
| 157 | |
| 158 | /* Codebook Indices */ |
| 159 | for( k = 0; k < psEncC->nb_subfr; k++ ) { |
| 160 | silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) ); |
| 161 | ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 ); |
| 162 | } |
| 163 | |
| 164 | /**********************/ |
| 165 | /* Encode LTP scaling */ |
| 166 | /**********************/ |
| 167 | if( condCoding == CODE_INDEPENDENTLY ) { |
| 168 | silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 ); |
| 169 | ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 ); |
| 170 | } |
| 171 | silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 ); |
| 172 | } |
| 173 | |
| 174 | psEncC->ec_prevSignalType = psIndices->signalType; |
| 175 | |
| 176 | /***************/ |
| 177 | /* Encode seed */ |
| 178 | /***************/ |
| 179 | silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 ); |
| 180 | ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 ); |
| 181 | } |