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annotate src/opus-1.3/silk/code_signs.c @ 79:91c729825bca pa_catalina

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Update build for AUDIO_COMPONENT_FIX
author Chris Cannam
date Wed, 30 Oct 2019 12:40:34 +0000
parents 7aeed7906520
children
rev   line source
Chris@69 1 /***********************************************************************
Chris@69 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Chris@69 3 Redistribution and use in source and binary forms, with or without
Chris@69 4 modification, are permitted provided that the following conditions
Chris@69 5 are met:
Chris@69 6 - Redistributions of source code must retain the above copyright notice,
Chris@69 7 this list of conditions and the following disclaimer.
Chris@69 8 - Redistributions in binary form must reproduce the above copyright
Chris@69 9 notice, this list of conditions and the following disclaimer in the
Chris@69 10 documentation and/or other materials provided with the distribution.
Chris@69 11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
Chris@69 12 names of specific contributors, may be used to endorse or promote
Chris@69 13 products derived from this software without specific prior written
Chris@69 14 permission.
Chris@69 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Chris@69 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Chris@69 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Chris@69 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
Chris@69 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
Chris@69 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
Chris@69 21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Chris@69 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Chris@69 23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
Chris@69 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Chris@69 25 POSSIBILITY OF SUCH DAMAGE.
Chris@69 26 ***********************************************************************/
Chris@69 27
Chris@69 28 #ifdef HAVE_CONFIG_H
Chris@69 29 #include "config.h"
Chris@69 30 #endif
Chris@69 31
Chris@69 32 #include "main.h"
Chris@69 33
Chris@69 34 /*#define silk_enc_map(a) ((a) > 0 ? 1 : 0)*/
Chris@69 35 /*#define silk_dec_map(a) ((a) > 0 ? 1 : -1)*/
Chris@69 36 /* shifting avoids if-statement */
Chris@69 37 #define silk_enc_map(a) ( silk_RSHIFT( (a), 15 ) + 1 )
Chris@69 38 #define silk_dec_map(a) ( silk_LSHIFT( (a), 1 ) - 1 )
Chris@69 39
Chris@69 40 /* Encodes signs of excitation */
Chris@69 41 void silk_encode_signs(
Chris@69 42 ec_enc *psRangeEnc, /* I/O Compressor data structure */
Chris@69 43 const opus_int8 pulses[], /* I pulse signal */
Chris@69 44 opus_int length, /* I length of input */
Chris@69 45 const opus_int signalType, /* I Signal type */
Chris@69 46 const opus_int quantOffsetType, /* I Quantization offset type */
Chris@69 47 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
Chris@69 48 )
Chris@69 49 {
Chris@69 50 opus_int i, j, p;
Chris@69 51 opus_uint8 icdf[ 2 ];
Chris@69 52 const opus_int8 *q_ptr;
Chris@69 53 const opus_uint8 *icdf_ptr;
Chris@69 54
Chris@69 55 icdf[ 1 ] = 0;
Chris@69 56 q_ptr = pulses;
Chris@69 57 i = silk_SMULBB( 7, silk_ADD_LSHIFT( quantOffsetType, signalType, 1 ) );
Chris@69 58 icdf_ptr = &silk_sign_iCDF[ i ];
Chris@69 59 length = silk_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH );
Chris@69 60 for( i = 0; i < length; i++ ) {
Chris@69 61 p = sum_pulses[ i ];
Chris@69 62 if( p > 0 ) {
Chris@69 63 icdf[ 0 ] = icdf_ptr[ silk_min( p & 0x1F, 6 ) ];
Chris@69 64 for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) {
Chris@69 65 if( q_ptr[ j ] != 0 ) {
Chris@69 66 ec_enc_icdf( psRangeEnc, silk_enc_map( q_ptr[ j ]), icdf, 8 );
Chris@69 67 }
Chris@69 68 }
Chris@69 69 }
Chris@69 70 q_ptr += SHELL_CODEC_FRAME_LENGTH;
Chris@69 71 }
Chris@69 72 }
Chris@69 73
Chris@69 74 /* Decodes signs of excitation */
Chris@69 75 void silk_decode_signs(
Chris@69 76 ec_dec *psRangeDec, /* I/O Compressor data structure */
Chris@69 77 opus_int16 pulses[], /* I/O pulse signal */
Chris@69 78 opus_int length, /* I length of input */
Chris@69 79 const opus_int signalType, /* I Signal type */
Chris@69 80 const opus_int quantOffsetType, /* I Quantization offset type */
Chris@69 81 const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
Chris@69 82 )
Chris@69 83 {
Chris@69 84 opus_int i, j, p;
Chris@69 85 opus_uint8 icdf[ 2 ];
Chris@69 86 opus_int16 *q_ptr;
Chris@69 87 const opus_uint8 *icdf_ptr;
Chris@69 88
Chris@69 89 icdf[ 1 ] = 0;
Chris@69 90 q_ptr = pulses;
Chris@69 91 i = silk_SMULBB( 7, silk_ADD_LSHIFT( quantOffsetType, signalType, 1 ) );
Chris@69 92 icdf_ptr = &silk_sign_iCDF[ i ];
Chris@69 93 length = silk_RSHIFT( length + SHELL_CODEC_FRAME_LENGTH/2, LOG2_SHELL_CODEC_FRAME_LENGTH );
Chris@69 94 for( i = 0; i < length; i++ ) {
Chris@69 95 p = sum_pulses[ i ];
Chris@69 96 if( p > 0 ) {
Chris@69 97 icdf[ 0 ] = icdf_ptr[ silk_min( p & 0x1F, 6 ) ];
Chris@69 98 for( j = 0; j < SHELL_CODEC_FRAME_LENGTH; j++ ) {
Chris@69 99 if( q_ptr[ j ] > 0 ) {
Chris@69 100 /* attach sign */
Chris@69 101 #if 0
Chris@69 102 /* conditional implementation */
Chris@69 103 if( ec_dec_icdf( psRangeDec, icdf, 8 ) == 0 ) {
Chris@69 104 q_ptr[ j ] = -q_ptr[ j ];
Chris@69 105 }
Chris@69 106 #else
Chris@69 107 /* implementation with shift, subtraction, multiplication */
Chris@69 108 q_ptr[ j ] *= silk_dec_map( ec_dec_icdf( psRangeDec, icdf, 8 ) );
Chris@69 109 #endif
Chris@69 110 }
Chris@69 111 }
Chris@69 112 }
Chris@69 113 q_ptr += SHELL_CODEC_FRAME_LENGTH;
Chris@69 114 }
Chris@69 115 }