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comparison: media/libopus/silk/encode_indices.c
media/libopus/silk/encode_indices.c
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| 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. | |
| 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the | |
| 12 names of specific contributors, may be used to endorse or promote | |
| 13 products derived from this software without specific prior written | |
| 14 permission. | |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 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 } |
