Chris@69: /*********************************************************************** Chris@69: Copyright (c) 2006-2011, Skype Limited. All rights reserved. Chris@69: Redistribution and use in source and binary forms, with or without Chris@69: modification, are permitted provided that the following conditions Chris@69: are met: Chris@69: - Redistributions of source code must retain the above copyright notice, Chris@69: this list of conditions and the following disclaimer. Chris@69: - Redistributions in binary form must reproduce the above copyright Chris@69: notice, this list of conditions and the following disclaimer in the Chris@69: documentation and/or other materials provided with the distribution. Chris@69: - Neither the name of Internet Society, IETF or IETF Trust, nor the Chris@69: names of specific contributors, may be used to endorse or promote Chris@69: products derived from this software without specific prior written Chris@69: permission. Chris@69: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" Chris@69: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE Chris@69: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Chris@69: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE Chris@69: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR Chris@69: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF Chris@69: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS Chris@69: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN Chris@69: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) Chris@69: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE Chris@69: POSSIBILITY OF SUCH DAMAGE. Chris@69: ***********************************************************************/ Chris@69: Chris@69: #ifdef HAVE_CONFIG_H Chris@69: #include "config.h" Chris@69: #endif Chris@69: Chris@69: #include "main.h" Chris@69: #include "stack_alloc.h" Chris@69: Chris@69: /*********************************************/ Chris@69: /* Encode quantization indices of excitation */ Chris@69: /*********************************************/ Chris@69: Chris@69: static OPUS_INLINE opus_int combine_and_check( /* return ok */ Chris@69: opus_int *pulses_comb, /* O */ Chris@69: const opus_int *pulses_in, /* I */ Chris@69: opus_int max_pulses, /* I max value for sum of pulses */ Chris@69: opus_int len /* I number of output values */ Chris@69: ) Chris@69: { Chris@69: opus_int k, sum; Chris@69: Chris@69: for( k = 0; k < len; k++ ) { Chris@69: sum = pulses_in[ 2 * k ] + pulses_in[ 2 * k + 1 ]; Chris@69: if( sum > max_pulses ) { Chris@69: return 1; Chris@69: } Chris@69: pulses_comb[ k ] = sum; Chris@69: } Chris@69: Chris@69: return 0; Chris@69: } Chris@69: Chris@69: /* Encode quantization indices of excitation */ Chris@69: void silk_encode_pulses( Chris@69: ec_enc *psRangeEnc, /* I/O compressor data structure */ Chris@69: const opus_int signalType, /* I Signal type */ Chris@69: const opus_int quantOffsetType, /* I quantOffsetType */ Chris@69: opus_int8 pulses[], /* I quantization indices */ Chris@69: const opus_int frame_length /* I Frame length */ Chris@69: ) Chris@69: { Chris@69: opus_int i, k, j, iter, bit, nLS, scale_down, RateLevelIndex = 0; Chris@69: opus_int32 abs_q, minSumBits_Q5, sumBits_Q5; Chris@69: VARDECL( opus_int, abs_pulses ); Chris@69: VARDECL( opus_int, sum_pulses ); Chris@69: VARDECL( opus_int, nRshifts ); Chris@69: opus_int pulses_comb[ 8 ]; Chris@69: opus_int *abs_pulses_ptr; Chris@69: const opus_int8 *pulses_ptr; Chris@69: const opus_uint8 *cdf_ptr; Chris@69: const opus_uint8 *nBits_ptr; Chris@69: SAVE_STACK; Chris@69: Chris@69: silk_memset( pulses_comb, 0, 8 * sizeof( opus_int ) ); /* Fixing Valgrind reported problem*/ Chris@69: Chris@69: /****************************/ Chris@69: /* Prepare for shell coding */ Chris@69: /****************************/ Chris@69: /* Calculate number of shell blocks */ Chris@69: silk_assert( 1 << LOG2_SHELL_CODEC_FRAME_LENGTH == SHELL_CODEC_FRAME_LENGTH ); Chris@69: iter = silk_RSHIFT( frame_length, LOG2_SHELL_CODEC_FRAME_LENGTH ); Chris@69: if( iter * SHELL_CODEC_FRAME_LENGTH < frame_length ) { Chris@69: celt_assert( frame_length == 12 * 10 ); /* Make sure only happens for 10 ms @ 12 kHz */ Chris@69: iter++; Chris@69: silk_memset( &pulses[ frame_length ], 0, SHELL_CODEC_FRAME_LENGTH * sizeof(opus_int8)); Chris@69: } Chris@69: Chris@69: /* Take the absolute value of the pulses */ Chris@69: ALLOC( abs_pulses, iter * SHELL_CODEC_FRAME_LENGTH, opus_int ); Chris@69: silk_assert( !( SHELL_CODEC_FRAME_LENGTH & 3 ) ); Chris@69: for( i = 0; i < iter * SHELL_CODEC_FRAME_LENGTH; i+=4 ) { Chris@69: abs_pulses[i+0] = ( opus_int )silk_abs( pulses[ i + 0 ] ); Chris@69: abs_pulses[i+1] = ( opus_int )silk_abs( pulses[ i + 1 ] ); Chris@69: abs_pulses[i+2] = ( opus_int )silk_abs( pulses[ i + 2 ] ); Chris@69: abs_pulses[i+3] = ( opus_int )silk_abs( pulses[ i + 3 ] ); Chris@69: } Chris@69: Chris@69: /* Calc sum pulses per shell code frame */ Chris@69: ALLOC( sum_pulses, iter, opus_int ); Chris@69: ALLOC( nRshifts, iter, opus_int ); Chris@69: abs_pulses_ptr = abs_pulses; Chris@69: for( i = 0; i < iter; i++ ) { Chris@69: nRshifts[ i ] = 0; Chris@69: Chris@69: while( 1 ) { Chris@69: /* 1+1 -> 2 */ Chris@69: scale_down = combine_and_check( pulses_comb, abs_pulses_ptr, silk_max_pulses_table[ 0 ], 8 ); Chris@69: /* 2+2 -> 4 */ Chris@69: scale_down += combine_and_check( pulses_comb, pulses_comb, silk_max_pulses_table[ 1 ], 4 ); Chris@69: /* 4+4 -> 8 */ Chris@69: scale_down += combine_and_check( pulses_comb, pulses_comb, silk_max_pulses_table[ 2 ], 2 ); Chris@69: /* 8+8 -> 16 */ Chris@69: scale_down += combine_and_check( &sum_pulses[ i ], pulses_comb, silk_max_pulses_table[ 3 ], 1 ); Chris@69: Chris@69: if( scale_down ) { Chris@69: /* We need to downscale the quantization signal */ Chris@69: nRshifts[ i ]++; Chris@69: for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) { Chris@69: abs_pulses_ptr[ k ] = silk_RSHIFT( abs_pulses_ptr[ k ], 1 ); Chris@69: } Chris@69: } else { Chris@69: /* Jump out of while(1) loop and go to next shell coding frame */ Chris@69: break; Chris@69: } Chris@69: } Chris@69: abs_pulses_ptr += SHELL_CODEC_FRAME_LENGTH; Chris@69: } Chris@69: Chris@69: /**************/ Chris@69: /* Rate level */ Chris@69: /**************/ Chris@69: /* find rate level that leads to fewest bits for coding of pulses per block info */ Chris@69: minSumBits_Q5 = silk_int32_MAX; Chris@69: for( k = 0; k < N_RATE_LEVELS - 1; k++ ) { Chris@69: nBits_ptr = silk_pulses_per_block_BITS_Q5[ k ]; Chris@69: sumBits_Q5 = silk_rate_levels_BITS_Q5[ signalType >> 1 ][ k ]; Chris@69: for( i = 0; i < iter; i++ ) { Chris@69: if( nRshifts[ i ] > 0 ) { Chris@69: sumBits_Q5 += nBits_ptr[ SILK_MAX_PULSES + 1 ]; Chris@69: } else { Chris@69: sumBits_Q5 += nBits_ptr[ sum_pulses[ i ] ]; Chris@69: } Chris@69: } Chris@69: if( sumBits_Q5 < minSumBits_Q5 ) { Chris@69: minSumBits_Q5 = sumBits_Q5; Chris@69: RateLevelIndex = k; Chris@69: } Chris@69: } Chris@69: ec_enc_icdf( psRangeEnc, RateLevelIndex, silk_rate_levels_iCDF[ signalType >> 1 ], 8 ); Chris@69: Chris@69: /***************************************************/ Chris@69: /* Sum-Weighted-Pulses Encoding */ Chris@69: /***************************************************/ Chris@69: cdf_ptr = silk_pulses_per_block_iCDF[ RateLevelIndex ]; Chris@69: for( i = 0; i < iter; i++ ) { Chris@69: if( nRshifts[ i ] == 0 ) { Chris@69: ec_enc_icdf( psRangeEnc, sum_pulses[ i ], cdf_ptr, 8 ); Chris@69: } else { Chris@69: ec_enc_icdf( psRangeEnc, SILK_MAX_PULSES + 1, cdf_ptr, 8 ); Chris@69: for( k = 0; k < nRshifts[ i ] - 1; k++ ) { Chris@69: ec_enc_icdf( psRangeEnc, SILK_MAX_PULSES + 1, silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 ); Chris@69: } Chris@69: ec_enc_icdf( psRangeEnc, sum_pulses[ i ], silk_pulses_per_block_iCDF[ N_RATE_LEVELS - 1 ], 8 ); Chris@69: } Chris@69: } Chris@69: Chris@69: /******************/ Chris@69: /* Shell Encoding */ Chris@69: /******************/ Chris@69: for( i = 0; i < iter; i++ ) { Chris@69: if( sum_pulses[ i ] > 0 ) { Chris@69: silk_shell_encoder( psRangeEnc, &abs_pulses[ i * SHELL_CODEC_FRAME_LENGTH ] ); Chris@69: } Chris@69: } Chris@69: Chris@69: /****************/ Chris@69: /* LSB Encoding */ Chris@69: /****************/ Chris@69: for( i = 0; i < iter; i++ ) { Chris@69: if( nRshifts[ i ] > 0 ) { Chris@69: pulses_ptr = &pulses[ i * SHELL_CODEC_FRAME_LENGTH ]; Chris@69: nLS = nRshifts[ i ] - 1; Chris@69: for( k = 0; k < SHELL_CODEC_FRAME_LENGTH; k++ ) { Chris@69: abs_q = (opus_int8)silk_abs( pulses_ptr[ k ] ); Chris@69: for( j = nLS; j > 0; j-- ) { Chris@69: bit = silk_RSHIFT( abs_q, j ) & 1; Chris@69: ec_enc_icdf( psRangeEnc, bit, silk_lsb_iCDF, 8 ); Chris@69: } Chris@69: bit = abs_q & 1; Chris@69: ec_enc_icdf( psRangeEnc, bit, silk_lsb_iCDF, 8 ); Chris@69: } Chris@69: } Chris@69: } Chris@69: Chris@69: /****************/ Chris@69: /* Encode signs */ Chris@69: /****************/ Chris@69: silk_encode_signs( psRangeEnc, pulses, frame_length, signalType, quantOffsetType, sum_pulses ); Chris@69: RESTORE_STACK; Chris@69: }