1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************************************************************** 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCopyright (c) 2006-2011, Skype Limited. All rights reserved. 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgRedistribution and use in source and binary forms, with or without 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgmodification, are permitted provided that the following conditions 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgare met: 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions of source code must retain the above copyright notice, 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgthis list of conditions and the following disclaimer. 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions in binary form must reproduce the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnotice, this list of conditions and the following disclaimer in the 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgdocumentation and/or other materials provided with the distribution. 11e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org- Neither the name of Internet Society, IETF or IETF Trust, nor the 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnames of specific contributors, may be used to endorse or promote 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgproducts derived from this software without specific prior written 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgpermission. 15e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgLIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgPOSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org***********************************************************************/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "main.h" 33885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*#define silk_enc_map(a) ((a) > 0 ? 1 : 0)*/ 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*#define silk_dec_map(a) ((a) > 0 ? 1 : -1)*/ 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* shifting avoids if-statement */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#define silk_enc_map(a) ( silk_RSHIFT( (a), 15 ) + 1 ) 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#define silk_dec_map(a) ( silk_LSHIFT( (a), 1 ) - 1 ) 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Encodes signs of excitation */ 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_encode_signs( 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ec_enc *psRangeEnc, /* I/O Compressor data structure */ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int8 pulses[], /* I pulse signal */ 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int length, /* I length of input */ 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int signalType, /* I Signal type */ 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int quantOffsetType, /* I Quantization offset type */ 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, j, p; 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_uint8 icdf[ 2 ]; 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int8 *q_ptr; 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_uint8 *icdf_ptr; 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf[ 1 ] = 0; 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr = pulses; 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org i = silk_SMULBB( 7, silk_ADD_LSHIFT( quantOffsetType, signalType, 1 ) ); 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf_ptr = &silk_sign_iCDF[ i ]; 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org length = silk_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH ); 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < length; i++ ) { 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org p = sum_pulses[ i ]; 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( p > 0 ) { 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf[ 0 ] = icdf_ptr[ silk_min( p & 0x1F, 6 ) ]; 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) { 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( q_ptr[ j ] != 0 ) { 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ec_enc_icdf( psRangeEnc, silk_enc_map( q_ptr[ j ]), icdf, 8 ); 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr += SHELL_CODEC_FRAME_LENGTH; 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Decodes signs of excitation */ 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_decode_signs( 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ec_dec *psRangeDec, /* I/O Compressor data structure */ 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int pulses[], /* I/O pulse signal */ 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int length, /* I length of input */ 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int signalType, /* I Signal type */ 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int quantOffsetType, /* I Quantization offset type */ 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */ 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, j, p; 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_uint8 icdf[ 2 ]; 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int *q_ptr; 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_uint8 *icdf_ptr; 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf[ 1 ] = 0; 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr = pulses; 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org i = silk_SMULBB( 7, silk_ADD_LSHIFT( quantOffsetType, signalType, 1 ) ); 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf_ptr = &silk_sign_iCDF[ i ]; 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org length = silk_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH ); 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < length; i++ ) { 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org p = sum_pulses[ i ]; 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( p > 0 ) { 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org icdf[ 0 ] = icdf_ptr[ silk_min( p & 0x1F, 6 ) ]; 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) { 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( q_ptr[ j ] > 0 ) { 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* attach sign */ 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#if 0 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* conditional implementation */ 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( ec_dec_icdf( psRangeDec, icdf, 8 ) == 0 ) { 104885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr[ j ] = -q_ptr[ j ]; 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#else 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* implementation with shift, subtraction, multiplication */ 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr[ j ] *= silk_dec_map( ec_dec_icdf( psRangeDec, icdf, 8 ) ); 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 110885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org q_ptr += SHELL_CODEC_FRAME_LENGTH; 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 116