995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
181 lines
9.1 KiB
C
181 lines
9.1 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "main.h"
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/* Encode side-information parameters to payload */
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void silk_encode_indices(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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ec_enc *psRangeEnc, /* I/O Compressor data structure */
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opus_int FrameIndex, /* I Frame number */
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opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */
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opus_int condCoding /* I The type of conditional coding to use */
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)
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{
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opus_int i, k, typeOffset;
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opus_int encode_absolute_lagIndex, delta_lagIndex;
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opus_int16 ec_ix[ MAX_LPC_ORDER ];
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opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
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const SideInfoIndices *psIndices;
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if( encode_LBRR ) {
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psIndices = &psEncC->indices_LBRR[ FrameIndex ];
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} else {
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psIndices = &psEncC->indices;
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}
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/*******************************************/
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/* Encode signal type and quantizer offset */
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/*******************************************/
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typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
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silk_assert( typeOffset >= 0 && typeOffset < 6 );
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silk_assert( encode_LBRR == 0 || typeOffset >= 2 );
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if( encode_LBRR || typeOffset >= 2 ) {
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ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 );
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} else {
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ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 );
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}
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/****************/
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/* Encode gains */
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/****************/
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/* first subframe */
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if( condCoding == CODE_CONDITIONALLY ) {
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/* conditional coding */
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silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 );
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} else {
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/* independent coding, in two stages: MSB bits followed by 3 LSBs */
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silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
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ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 );
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 );
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}
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/* remaining subframes */
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for( i = 1; i < psEncC->nb_subfr; i++ ) {
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silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
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ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 );
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}
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/****************/
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/* Encode NLSFs */
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/****************/
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 );
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silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] );
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silk_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder );
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for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) {
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if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) {
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ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
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} else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) {
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ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
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ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
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} else {
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ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
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}
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}
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/* Encode NLSF interpolation factor */
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if( psEncC->nb_subfr == MAX_NB_SUBFR ) {
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silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
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ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 );
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}
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if( psIndices->signalType == TYPE_VOICED )
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{
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/*********************/
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/* Encode pitch lags */
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/*********************/
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/* lag index */
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encode_absolute_lagIndex = 1;
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if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) {
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/* Delta Encoding */
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delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex;
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if( delta_lagIndex < -8 || delta_lagIndex > 11 ) {
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delta_lagIndex = 0;
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} else {
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delta_lagIndex = delta_lagIndex + 9;
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encode_absolute_lagIndex = 0; /* Only use delta */
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}
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silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 );
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ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 );
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}
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if( encode_absolute_lagIndex ) {
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/* Absolute encoding */
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opus_int32 pitch_high_bits, pitch_low_bits;
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pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
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pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
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silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
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silk_assert( pitch_high_bits < 32 );
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ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 );
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ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 );
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}
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psEncC->ec_prevLagIndex = psIndices->lagIndex;
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/* Countour index */
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silk_assert( psIndices->contourIndex >= 0 );
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silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) ||
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( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) ||
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( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) ||
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( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) );
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ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 );
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/********************/
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/* Encode LTP gains */
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/********************/
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/* PERIndex value */
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silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 );
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ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 );
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/* Codebook Indices */
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for( k = 0; k < psEncC->nb_subfr; k++ ) {
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silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) );
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ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 );
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}
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/**********************/
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/* Encode LTP scaling */
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/**********************/
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if( condCoding == CODE_INDEPENDENTLY ) {
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silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
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ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 );
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}
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silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
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}
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psEncC->ec_prevSignalType = psIndices->signalType;
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/***************/
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/* Encode seed */
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/***************/
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silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
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ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 );
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}
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