mirror of
https://github.com/musix-org/musix-oss
synced 2024-11-14 06:40:21 +00:00
182 lines
9.1 KiB
C
182 lines
9.1 KiB
C
/***********************************************************************
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, 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
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
- Neither the name of Internet Society, IETF or IETF Trust, nor the
|
|
names of specific contributors, may be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
***********************************************************************/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "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 condCoding /* I The type of conditional coding to use */
|
|
)
|
|
{
|
|
opus_int i, k, 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( encode_LBRR ) {
|
|
psIndices = &psEncC->indices_LBRR[ FrameIndex ];
|
|
} else {
|
|
psIndices = &psEncC->indices;
|
|
}
|
|
|
|
/*******************************************/
|
|
/* Encode signal type and quantizer offset */
|
|
/*******************************************/
|
|
typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
|
|
silk_assert( typeOffset >= 0 && typeOffset < 6 );
|
|
silk_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 */
|
|
/****************/
|
|
/* first subframe */
|
|
if( condCoding == CODE_CONDITIONALLY ) {
|
|
/* conditional coding */
|
|
silk_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 */
|
|
silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
|
|
ec_enc_icdf( psRangeEnc, silk_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++ ) {
|
|
silk_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 );
|
|
}
|
|
|
|
/****************/
|
|
/* Encode NLSFs */
|
|
/****************/
|
|
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 ] );
|
|
silk_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 ) {
|
|
silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
|
|
ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 );
|
|
}
|
|
|
|
if( psIndices->signalType == TYPE_VOICED )
|
|
{
|
|
/*********************/
|
|
/* Encode pitch lags */
|
|
/*********************/
|
|
/* lag index */
|
|
encode_absolute_lagIndex = 1;
|
|
if( condCoding == CODE_CONDITIONALLY && 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 */
|
|
}
|
|
silk_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 = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
|
|
pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
|
|
silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
|
|
silk_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;
|
|
|
|
/* Countour index */
|
|
silk_assert( psIndices->contourIndex >= 0 );
|
|
silk_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 );
|
|
|
|
/********************/
|
|
/* Encode LTP gains */
|
|
/********************/
|
|
/* PERIndex value */
|
|
silk_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++ ) {
|
|
silk_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 == CODE_INDEPENDENTLY ) {
|
|
silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
|
|
ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 );
|
|
}
|
|
silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
|
|
}
|
|
|
|
psEncC->ec_prevSignalType = psIndices->signalType;
|
|
|
|
/***************/
|
|
/* Encode seed */
|
|
/***************/
|
|
silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
|
|
ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 );
|
|
}
|