ref: 25f7f35555168f3426b9aad1efefab466f365af6
dir: /silk/silk_encode_indices.c/
/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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modification, (subject to the limitations in the disclaimer below)
are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
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documentation and/or other materials provided with the distribution.
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this software without specific prior written permission.
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "silk_main.h"
/* Encode side-information parameters to payload */
void silk_encode_indices(
silk_encoder_state *psEncC, /* I/O Encoder state */
ec_enc *psRangeEnc, /* I/O Compressor data structure */
opus_int FrameIndex, /* I Frame number */
opus_int encode_LBRR /* I Flag indicating LBRR data is being encoded */
)
{
opus_int i, k, condCoding, typeOffset;
opus_int encode_absolute_lagIndex, delta_lagIndex;
opus_int16 ec_ix[ MAX_LPC_ORDER ];
opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
const SideInfoIndices *psIndices;
#if SAVE_ALL_INTERNAL_DATA
opus_int nBytes_lagIndex, nBytes_contourIndex, nBytes_LTP;
opus_int nBytes_after, nBytes_before;
#endif
/* Use conditional coding if previous frame available */
if( FrameIndex > 0 && ( encode_LBRR == 0 || psEncC->LBRR_flags[ FrameIndex - 1 ] == 1 ) ) {
condCoding = 1;
} else {
condCoding = 0;
}
if( encode_LBRR ) {
psIndices = &psEncC->indices_LBRR[ FrameIndex ];
} else {
psIndices = &psEncC->indices;
}
/*******************************************/
/* Encode signal type and quantizer offset */
/*******************************************/
typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
SKP_assert( typeOffset >= 0 && typeOffset < 6 );
SKP_assert( encode_LBRR == 0 || typeOffset >= 2 );
if( encode_LBRR || typeOffset >= 2 ) {
ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 );
} else {
ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 );
}
/****************/
/* Encode gains */
/****************/
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
/* first subframe */
if( condCoding ) {
/* conditional coding */
SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 );
} else {
/* independent coding, in two stages: MSB bits followed by 3 LSBs */
SKP_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
ec_enc_icdf( psRangeEnc, SKP_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 );
ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 );
}
/* remaining subframes */
for( i = 1; i < psEncC->nb_subfr; i++ ) {
SKP_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 );
}
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
nBytes_after -= nBytes_before; /* bytes just added*/
DEBUG_STORE_DATA( nBytes_gains.dat, &nBytes_after, sizeof( opus_int ) );
#endif
/****************/
/* Encode NLSFs */
/****************/
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 );
silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] );
SKP_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder );
for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) {
if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) {
ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
} else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) {
ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
} else {
ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
}
}
/* Encode NLSF interpolation factor */
if( psEncC->nb_subfr == MAX_NB_SUBFR ) {
SKP_assert( psEncC->useInterpolatedNLSFs == 1 || psIndices->NLSFInterpCoef_Q2 == ( 1 << 2 ) );
SKP_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 );
}
#ifdef SAVE_ALL_INTERNAL_DATA
DEBUG_STORE_DATA( lsf_interpol.dat, &psIndices->NLSFInterpCoef_Q2, sizeof(int) );
nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
nBytes_after -= nBytes_before; /* bytes just added*/
DEBUG_STORE_DATA( nBytes_LSF.dat, &nBytes_after, sizeof( opus_int ) );
#endif
if( psIndices->signalType == TYPE_VOICED )
{
/*********************/
/* Encode pitch lags */
/*********************/
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
/* lag index */
encode_absolute_lagIndex = 1;
if( condCoding && psEncC->ec_prevSignalType == TYPE_VOICED ) {
/* Delta Encoding */
delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex;
if( delta_lagIndex < -8 || delta_lagIndex > 11 ) {
delta_lagIndex = 0;
} else {
delta_lagIndex = delta_lagIndex + 9;
encode_absolute_lagIndex = 0; /* Only use delta */
}
SKP_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 );
ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 );
}
if( encode_absolute_lagIndex ) {
/* Absolute encoding */
opus_int32 pitch_high_bits, pitch_low_bits;
pitch_high_bits = SKP_DIV32_16( psIndices->lagIndex, SKP_RSHIFT( psEncC->fs_kHz, 1 ) );
pitch_low_bits = psIndices->lagIndex - SKP_SMULBB( pitch_high_bits, SKP_RSHIFT( psEncC->fs_kHz, 1 ) );
SKP_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
SKP_assert( pitch_high_bits < 32 );
ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 );
ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 );
}
psEncC->ec_prevLagIndex = psIndices->lagIndex;
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
nBytes_lagIndex = nBytes_after - nBytes_before; /* bytes just added*/
#endif
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
/* Countour index */
SKP_assert( psIndices->contourIndex >= 0 );
SKP_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) ||
( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) ||
( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) ||
( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) );
ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 );
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
nBytes_contourIndex = nBytes_after - nBytes_before; /* bytes just added*/
#endif
/********************/
/* Encode LTP gains */
/********************/
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
/* PERIndex value */
SKP_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 );
ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 );
/* Codebook Indices */
for( k = 0; k < psEncC->nb_subfr; k++ ) {
SKP_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) );
ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 );
}
/**********************/
/* Encode LTP scaling */
/**********************/
if( !condCoding ) {
SKP_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 );
}
SKP_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_after = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
nBytes_LTP = nBytes_after - nBytes_before; /* bytes just added*/
#endif
}
#ifdef SAVE_ALL_INTERNAL_DATA
else {
/* Unvoiced speech*/
nBytes_lagIndex = 0;
nBytes_contourIndex = 0;
nBytes_LTP = 0;
}
DEBUG_STORE_DATA( nBytes_lagIndex.dat, &nBytes_lagIndex, sizeof( opus_int ) );
DEBUG_STORE_DATA( nBytes_contourIndex.dat, &nBytes_contourIndex, sizeof( opus_int ) );
DEBUG_STORE_DATA( nBytes_LTP.dat, &nBytes_LTP, sizeof( opus_int ) );
#endif
psEncC->ec_prevSignalType = psIndices->signalType;
#ifdef SAVE_ALL_INTERNAL_DATA
nBytes_before = SKP_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
#endif
/***************/
/* Encode seed */
/***************/
SKP_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 );
}