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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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tree10027f336435511475e392454359edea8e25895d /media/libopus/silk/encode_pulses.c
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Add m-esr52 at 52.6.0
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diff --git a/media/libopus/silk/encode_pulses.c b/media/libopus/silk/encode_pulses.c
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+/***********************************************************************
+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"
+#include "stack_alloc.h"
+
+/*********************************************/
+/* Encode quantization indices of excitation */
+/*********************************************/
+
+static OPUS_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;
+ VARDECL( opus_int, abs_pulses );
+ VARDECL( opus_int, sum_pulses );
+ VARDECL( opus_int, nRshifts );
+ 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;
+ SAVE_STACK;
+
+ 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 */
+ ALLOC( abs_pulses, iter * SHELL_CODEC_FRAME_LENGTH, opus_int );
+ silk_assert( !( SHELL_CODEC_FRAME_LENGTH & 3 ) );
+ 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 */
+ ALLOC( sum_pulses, iter, opus_int );
+ ALLOC( nRshifts, iter, opus_int );
+ 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[ SILK_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, SILK_MAX_PULSES + 1, cdf_ptr, 8 );
+ for( k = 0; k < nRshifts[ i ] - 1; k++ ) {
+ ec_enc_icdf( psRangeEnc, SILK_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 );
+ RESTORE_STACK;
+}