Mercurial > hg > sv-dependency-builds

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
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_FIX.h"
Chris@69 33 #include "tuning_parameters.h"
Chris@69 34
Chris@69 35 /* Processing of gains */
Chris@69 36 void silk_process_gains_FIX(
Chris@69 37 silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
Chris@69 38 silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */
Chris@69 39 opus_int condCoding /* I The type of conditional coding to use */
Chris@69 40 )
Chris@69 41 {
Chris@69 42 silk_shape_state_FIX *psShapeSt = &psEnc->sShape;
Chris@69 43 opus_int k;
Chris@69 44 opus_int32 s_Q16, InvMaxSqrVal_Q16, gain, gain_squared, ResNrg, ResNrgPart, quant_offset_Q10;
Chris@69 45
Chris@69 46 /* Gain reduction when LTP coding gain is high */
Chris@69 47 if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
Chris@69 48 /*s = -0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); */
Chris@69 49 s_Q16 = -silk_sigm_Q15( silk_RSHIFT_ROUND( psEncCtrl->LTPredCodGain_Q7 - SILK_FIX_CONST( 12.0, 7 ), 4 ) );
Chris@69 50 for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
Chris@69 51 psEncCtrl->Gains_Q16[ k ] = silk_SMLAWB( psEncCtrl->Gains_Q16[ k ], psEncCtrl->Gains_Q16[ k ], s_Q16 );
Chris@69 52 }
Chris@69 53 }
Chris@69 54
Chris@69 55 /* Limit the quantized signal */
Chris@69 56 /* InvMaxSqrVal = pow( 2.0f, 0.33f * ( 21.0f - SNR_dB ) ) / subfr_length; */
Chris@69 57 InvMaxSqrVal_Q16 = silk_DIV32_16( silk_log2lin(
Chris@69 58 silk_SMULWB( SILK_FIX_CONST( 21 + 16 / 0.33, 7 ) - psEnc->sCmn.SNR_dB_Q7, SILK_FIX_CONST( 0.33, 16 ) ) ), psEnc->sCmn.subfr_length );
Chris@69 59
Chris@69 60 for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
Chris@69 61 /* Soft limit on ratio residual energy and squared gains */
Chris@69 62 ResNrg = psEncCtrl->ResNrg[ k ];
Chris@69 63 ResNrgPart = silk_SMULWW( ResNrg, InvMaxSqrVal_Q16 );
Chris@69 64 if( psEncCtrl->ResNrgQ[ k ] > 0 ) {
Chris@69 65 ResNrgPart = silk_RSHIFT_ROUND( ResNrgPart, psEncCtrl->ResNrgQ[ k ] );
Chris@69 66 } else {
Chris@69 67 if( ResNrgPart >= silk_RSHIFT( silk_int32_MAX, -psEncCtrl->ResNrgQ[ k ] ) ) {
Chris@69 68 ResNrgPart = silk_int32_MAX;
Chris@69 69 } else {
Chris@69 70 ResNrgPart = silk_LSHIFT( ResNrgPart, -psEncCtrl->ResNrgQ[ k ] );
Chris@69 71 }
Chris@69 72 }
Chris@69 73 gain = psEncCtrl->Gains_Q16[ k ];
Chris@69 74 gain_squared = silk_ADD_SAT32( ResNrgPart, silk_SMMUL( gain, gain ) );
Chris@69 75 if( gain_squared < silk_int16_MAX ) {
Chris@69 76 /* recalculate with higher precision */
Chris@69 77 gain_squared = silk_SMLAWW( silk_LSHIFT( ResNrgPart, 16 ), gain, gain );
Chris@69 78 silk_assert( gain_squared > 0 );
Chris@69 79 gain = silk_SQRT_APPROX( gain_squared ); /* Q8 */
Chris@69 80 gain = silk_min( gain, silk_int32_MAX >> 8 );
Chris@69 81 psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 8 ); /* Q16 */
Chris@69 82 } else {
Chris@69 83 gain = silk_SQRT_APPROX( gain_squared ); /* Q0 */
Chris@69 84 gain = silk_min( gain, silk_int32_MAX >> 16 );
Chris@69 85 psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 16 ); /* Q16 */
Chris@69 86 }
Chris@69 87 }
Chris@69 88
Chris@69 89 /* Save unquantized gains and gain Index */
Chris@69 90 silk_memcpy( psEncCtrl->GainsUnq_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) );
Chris@69 91 psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex;
Chris@69 92
Chris@69 93 /* Quantize gains */
Chris@69 94 silk_gains_quant( psEnc->sCmn.indices.GainsIndices, psEncCtrl->Gains_Q16,
Chris@69 95 &psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr );
Chris@69 96
Chris@69 97 /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */
Chris@69 98 if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
Chris@69 99 if( psEncCtrl->LTPredCodGain_Q7 + silk_RSHIFT( psEnc->sCmn.input_tilt_Q15, 8 ) > SILK_FIX_CONST( 1.0, 7 ) ) {
Chris@69 100 psEnc->sCmn.indices.quantOffsetType = 0;
Chris@69 101 } else {
Chris@69 102 psEnc->sCmn.indices.quantOffsetType = 1;
Chris@69 103 }
Chris@69 104 }
Chris@69 105
Chris@69 106 /* Quantizer boundary adjustment */
Chris@69 107 quant_offset_Q10 = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ];
Chris@69 108 psEncCtrl->Lambda_Q10 = SILK_FIX_CONST( LAMBDA_OFFSET, 10 )
Chris@69 109 + silk_SMULBB( SILK_FIX_CONST( LAMBDA_DELAYED_DECISIONS, 10 ), psEnc->sCmn.nStatesDelayedDecision )
Chris@69 110 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_SPEECH_ACT, 18 ), psEnc->sCmn.speech_activity_Q8 )
Chris@69 111 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_INPUT_QUALITY, 12 ), psEncCtrl->input_quality_Q14 )
Chris@69 112 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_CODING_QUALITY, 12 ), psEncCtrl->coding_quality_Q14 )
Chris@69 113 + silk_SMULWB( SILK_FIX_CONST( LAMBDA_QUANT_OFFSET, 16 ), quant_offset_Q10 );
Chris@69 114
Chris@69 115 silk_assert( psEncCtrl->Lambda_Q10 > 0 );
Chris@69 116 silk_assert( psEncCtrl->Lambda_Q10 < SILK_FIX_CONST( 2, 10 ) );
Chris@69 117 }