mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-14 22:20:58 +00:00
200 lines
8.4 KiB
C
200 lines
8.4 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 quantization indices of excitation */
|
||
|
|
/*********************************************/
|
||
|
|
|
||
|
|
static inline opus_int combine_and_check( /* return ok */
|
||
|
|
opus_int *pulses_comb, /* O */
|
||
|
|
const opus_int *pulses_in, /* I */
|
||
|
|
opus_int max_pulses, /* I max value for sum of pulses */
|
||
|
|
opus_int len /* I number of output values */
|
||
|
|
)
|
||
|
|
{
|
||
|
|
opus_int k, sum;
|
||
|
|
|
||
|
|
for( k = 0; k < len; k++ ) {
|
||
|
|
sum = pulses_in[ 2 * k ] + pulses_in[ 2 * k + 1 ];
|
||
|
|
if( sum > max_pulses ) {
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
pulses_comb[ k ] = sum;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Encode quantization indices of excitation */
|
||
|
|
void silk_encode_pulses(
|
||
|
|
ec_enc *psRangeEnc, /* I/O compressor data structure */
|
||
|
|
const opus_int signalType, /* I Signal type */
|
||
|
|
const opus_int quantOffsetType, /* I quantOffsetType */
|
||
|
|
opus_int8 pulses[], /* I quantization indices */
|
||
|
|
const opus_int frame_length /* I Frame length */
|
||
|
|
)
|
||
|
|
{
|
||
|
|
opus_int i, k, j, iter, bit, nLS, scale_down, RateLevelIndex = 0;
|
||
|
|
opus_int32 abs_q, minSumBits_Q5, sumBits_Q5;
|
||
|
|
opus_int abs_pulses[ MAX_FRAME_LENGTH ];
|
||
|
|
opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ];
|
||
|
|
opus_int nRshifts[ MAX_NB_SHELL_BLOCKS ];
|
||
|
|
opus_int pulses_comb[ 8 ];
|
||
|
|
opus_int *abs_pulses_ptr;
|
||
|
|
const opus_int8 *pulses_ptr;
|
||
|
|
const opus_uint8 *cdf_ptr;
|
||
|
|
const opus_uint8 *nBits_ptr;
|
||
|
|
|
||
|
|
silk_memset( pulses_comb, 0, 8 * sizeof( opus_int ) ); /* Fixing Valgrind reported problem*/
|
||
|
|
|
||
|
|
/****************************/
|
||
|
|
/* Prepare for shell coding */
|
||
|
|
/****************************/
|
||
|
|
/* Calculate number of shell blocks */
|
||
|
|
silk_assert( 1 << LOG2_SHELL_CODEC_FRAME_LENGTH == SHELL_CODEC_FRAME_LENGTH );
|
||
|
|
iter = silk_RSHIFT( frame_length, LOG2_SHELL_CODEC_FRAME_LENGTH );
|
||
|
|
if( iter * SHELL_CODEC_FRAME_LENGTH < frame_length ) {
|
||
|
|
silk_assert( frame_length == 12 * 10 ); /* Make sure only happens for 10 ms @ 12 kHz */
|
||
|
|
iter++;
|
||
|
|
silk_memset( &pulses[ frame_length ], 0, SHELL_CODEC_FRAME_LENGTH * sizeof(opus_int8));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Take the absolute value of the pulses */
|
||
|
|
for( i = 0; i < iter * SHELL_CODEC_FRAME_LENGTH; i+=4 ) {
|
||
|
|
abs_pulses[i+0] = ( opus_int )silk_abs( pulses[ i + 0 ] );
|
||
|
|
abs_pulses[i+1] = ( opus_int )silk_abs( pulses[ i + 1 ] );
|
||
|
|
abs_pulses[i+2] = ( opus_int )silk_abs( pulses[ i + 2 ] );
|
||
|
|
abs_pulses[i+3] = ( opus_int )silk_abs( pulses[ i + 3 ] );
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Calc sum pulses per shell code frame */
|
||
|
|
abs_pulses_ptr = abs_pulses;
|
||
|
|
for( i = 0; i < iter; i++ ) {
|
||
|
|
nRshifts[ i ] = 0;
|
||
|
|
|
||
|
|
while( 1 ) {
|
||
|
|
/* 1+1 -> 2 */
|
||
|
|
scale_down = combine_and_check( pulses_comb, abs_pulses_ptr, silk_max_pulses_table[ 0 ], 8 );
|
||
|
|
/* 2+2 -> 4 */
|
||
|
|
scale_down += combine_and_check( pulses_comb, pulses_comb, silk_max_pulses_table[ 1 ], 4 );
|
||
|
|
/* 4+4 -> 8 */
|
||
|
|
scale_down += combine_and_check( pulses_comb, pulses_comb, silk_max_pulses_table[ 2 ], 2 );
|
||
|
|
/* 8+8 -> 16 */
|
||
|
|
scale_down += combine_and_check( &sum_pulses[ i ], pulses_comb, silk_max_pulses_table[ 3 ], 1 );
|
||
|
|
|
||
|
|
if( scale_down ) {
|
||
|
|
/* We need to downscale the quantization signal */
|
||
|
|
nRshifts[ i ]++;
|
||
|
|
for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
|
||
|
|
abs_pulses_ptr[ k ] = silk_RSHIFT( abs_pulses_ptr[ k ], 1 );
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* Jump out of while(1) loop and go to next shell coding frame */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
abs_pulses_ptr += SHELL_CODEC_FRAME_LENGTH;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**************/
|
||
|
|
/* Rate level */
|
||
|
|
/**************/
|
||
|
|
/* find rate level that leads to fewest bits for coding of pulses per block info */
|
||
|
|
minSumBits_Q5 = silk_int32_MAX;
|
||
|
|
for( k = 0; k < N_RATE_LEVELS - 1; k++ ) {
|
||
|
|
nBits_ptr = silk_pulses_per_block_BITS_Q5[ k ];
|
||
|
|
sumBits_Q5 = silk_rate_levels_BITS_Q5[ signalType >> 1 ][ k ];
|
||
|
|
for( i = 0; i < iter; i++ ) {
|
||
|
|
if( nRshifts[ i ] > 0 ) {
|
||
|
|
sumBits_Q5 += nBits_ptr[ MAX_PULSES + 1 ];
|
||
|
|
} else {
|
||
|
|
sumBits_Q5 += nBits_ptr[ sum_pulses[ i ] ];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if( sumBits_Q5 < minSumBits_Q5 ) {
|
||
|
|
minSumBits_Q5 = sumBits_Q5;
|
||
|
|
RateLevelIndex = k;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
ec_enc_icdf( psRangeEnc, RateLevelIndex, silk_rate_levels_iCDF[ signalType >> 1 ], 8 );
|
||
|
|
|
||
|
|
/***************************************************/
|
||
|
|
/* Sum-Weighted-Pulses Encoding */
|
||
|
|
/***************************************************/
|
||
|
|
cdf_ptr = silk_pulses_per_block_iCDF[ RateLevelIndex ];
|
||
|
|
for( i = 0; i < iter; i++ ) {
|
||
|
|
if( nRshifts[ i ] == 0 ) {
|
||
|
|
ec_enc_icdf( psRangeEnc, sum_pulses[ i ], cdf_ptr, 8 );
|
||
|
|
} else {
|
||
|
|
ec_enc_icdf( psRangeEnc, MAX_PULSES + 1, cdf_ptr, 8 );
|
||
|
|
for( k = 0; k < nRshifts[ i ] - 1; k++ ) {
|
||
|
|
ec_enc_icdf( psRangeEnc, MAX_PULSES + 1, silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 );
|
||
|
|
}
|
||
|
|
ec_enc_icdf( psRangeEnc, sum_pulses[ i ], silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/******************/
|
||
|
|
/* Shell Encoding */
|
||
|
|
/******************/
|
||
|
|
for( i = 0; i < iter; i++ ) {
|
||
|
|
if( sum_pulses[ i ] > 0 ) {
|
||
|
|
silk_shell_encoder( psRangeEnc, &abs_pulses[ i * SHELL_CODEC_FRAME_LENGTH ] );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/****************/
|
||
|
|
/* LSB Encoding */
|
||
|
|
/****************/
|
||
|
|
for( i = 0; i < iter; i++ ) {
|
||
|
|
if( nRshifts[ i ] > 0 ) {
|
||
|
|
pulses_ptr = &pulses[ i * SHELL_CODEC_FRAME_LENGTH ];
|
||
|
|
nLS = nRshifts[ i ] - 1;
|
||
|
|
for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
|
||
|
|
abs_q = (opus_int8)silk_abs( pulses_ptr[ k ] );
|
||
|
|
for( j = nLS; j > 0; j-- ) {
|
||
|
|
bit = silk_RSHIFT( abs_q, j ) & 1;
|
||
|
|
ec_enc_icdf( psRangeEnc, bit, silk_lsb_iCDF, 8 );
|
||
|
|
}
|
||
|
|
bit = abs_q & 1;
|
||
|
|
ec_enc_icdf( psRangeEnc, bit, silk_lsb_iCDF, 8 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/****************/
|
||
|
|
/* Encode signs */
|
||
|
|
/****************/
|
||
|
|
silk_encode_signs( psRangeEnc, pulses, frame_length, signalType, quantOffsetType, sum_pulses );
|
||
|
|
}
|