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46ae64cd60
This reverts commit e00426c512.
The way we handle platform-specific intrinsics is not good, so the
current state will not compile on armv8. This commit also requires
SSE4.1 support, which is likely not a good idea for portable binaries.
We'll have to redo this with more caution after 3.2 is released, or
we might simply drop opus as we're only using it as dependency for
theora right now.
Fixes #33606.
116 lines
5.5 KiB
C
116 lines
5.5 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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/*********************************************/
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/* Decode quantization indices of excitation */
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/*********************************************/
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void silk_decode_pulses(
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ec_dec *psRangeDec, /* I/O Compressor data structure */
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opus_int16 pulses[], /* O Excitation signal */
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const opus_int signalType, /* I Sigtype */
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const opus_int quantOffsetType, /* I quantOffsetType */
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const opus_int frame_length /* I Frame length */
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)
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{
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opus_int i, j, k, iter, abs_q, nLS, RateLevelIndex;
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opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ], nLshifts[ MAX_NB_SHELL_BLOCKS ];
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opus_int16 *pulses_ptr;
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const opus_uint8 *cdf_ptr;
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/*********************/
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/* Decode rate level */
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/*********************/
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RateLevelIndex = ec_dec_icdf( psRangeDec, silk_rate_levels_iCDF[ signalType >> 1 ], 8 );
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/* Calculate number of shell blocks */
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silk_assert( 1 << LOG2_SHELL_CODEC_FRAME_LENGTH == SHELL_CODEC_FRAME_LENGTH );
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iter = silk_RSHIFT( frame_length, LOG2_SHELL_CODEC_FRAME_LENGTH );
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if( iter * SHELL_CODEC_FRAME_LENGTH < frame_length ) {
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silk_assert( frame_length == 12 * 10 ); /* Make sure only happens for 10 ms @ 12 kHz */
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iter++;
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}
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/***************************************************/
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/* Sum-Weighted-Pulses Decoding */
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/***************************************************/
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cdf_ptr = silk_pulses_per_block_iCDF[ RateLevelIndex ];
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for( i = 0; i < iter; i++ ) {
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nLshifts[ i ] = 0;
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sum_pulses[ i ] = ec_dec_icdf( psRangeDec, cdf_ptr, 8 );
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/* LSB indication */
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while( sum_pulses[ i ] == SILK_MAX_PULSES + 1 ) {
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nLshifts[ i ]++;
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/* When we've already got 10 LSBs, we shift the table to not allow (SILK_MAX_PULSES + 1) */
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sum_pulses[ i ] = ec_dec_icdf( psRangeDec,
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silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1] + ( nLshifts[ i ] == 10 ), 8 );
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}
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}
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/***************************************************/
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/* Shell decoding */
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/***************************************************/
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for( i = 0; i < iter; i++ ) {
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if( sum_pulses[ i ] > 0 ) {
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silk_shell_decoder( &pulses[ silk_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ], psRangeDec, sum_pulses[ i ] );
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} else {
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silk_memset( &pulses[ silk_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ], 0, SHELL_CODEC_FRAME_LENGTH * sizeof( pulses[0] ) );
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}
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}
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/***************************************************/
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/* LSB Decoding */
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/***************************************************/
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for( i = 0; i < iter; i++ ) {
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if( nLshifts[ i ] > 0 ) {
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nLS = nLshifts[ i ];
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pulses_ptr = &pulses[ silk_SMULBB( i, SHELL_CODEC_FRAME_LENGTH ) ];
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for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) {
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abs_q = pulses_ptr[ k ];
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for( j = 0; j < nLS; j++ ) {
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abs_q = silk_LSHIFT( abs_q, 1 );
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abs_q += ec_dec_icdf( psRangeDec, silk_lsb_iCDF, 8 );
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}
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pulses_ptr[ k ] = abs_q;
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}
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/* Mark the number of pulses non-zero for sign decoding. */
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sum_pulses[ i ] |= nLS << 5;
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}
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}
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/****************************************/
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/* Decode and add signs to pulse signal */
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/****************************************/
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silk_decode_signs( psRangeDec, pulses, frame_length, signalType, quantOffsetType, sum_pulses );
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}
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