117 lines
6.4 KiB
C
Executable file
117 lines
6.4 KiB
C
Executable file
/***********************************************************************
|
|
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_FIX.h"
|
|
#include "tuning_parameters.h"
|
|
|
|
/* Processing of gains */
|
|
void silk_process_gains_FIX(
|
|
silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
|
|
silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */
|
|
opus_int condCoding /* I The type of conditional coding to use */
|
|
)
|
|
{
|
|
silk_shape_state_FIX *psShapeSt = &psEnc->sShape;
|
|
opus_int k;
|
|
opus_int32 s_Q16, InvMaxSqrVal_Q16, gain, gain_squared, ResNrg, ResNrgPart, quant_offset_Q10;
|
|
|
|
/* Gain reduction when LTP coding gain is high */
|
|
if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
|
|
/*s = -0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); */
|
|
s_Q16 = -silk_sigm_Q15( silk_RSHIFT_ROUND( psEncCtrl->LTPredCodGain_Q7 - SILK_FIX_CONST( 12.0, 7 ), 4 ) );
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
psEncCtrl->Gains_Q16[ k ] = silk_SMLAWB( psEncCtrl->Gains_Q16[ k ], psEncCtrl->Gains_Q16[ k ], s_Q16 );
|
|
}
|
|
}
|
|
|
|
/* Limit the quantized signal */
|
|
/* InvMaxSqrVal = pow( 2.0f, 0.33f * ( 21.0f - SNR_dB ) ) / subfr_length; */
|
|
InvMaxSqrVal_Q16 = silk_DIV32_16( silk_log2lin(
|
|
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 );
|
|
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
/* Soft limit on ratio residual energy and squared gains */
|
|
ResNrg = psEncCtrl->ResNrg[ k ];
|
|
ResNrgPart = silk_SMULWW( ResNrg, InvMaxSqrVal_Q16 );
|
|
if( psEncCtrl->ResNrgQ[ k ] > 0 ) {
|
|
ResNrgPart = silk_RSHIFT_ROUND( ResNrgPart, psEncCtrl->ResNrgQ[ k ] );
|
|
} else {
|
|
if( ResNrgPart >= silk_RSHIFT( silk_int32_MAX, -psEncCtrl->ResNrgQ[ k ] ) ) {
|
|
ResNrgPart = silk_int32_MAX;
|
|
} else {
|
|
ResNrgPart = silk_LSHIFT( ResNrgPart, -psEncCtrl->ResNrgQ[ k ] );
|
|
}
|
|
}
|
|
gain = psEncCtrl->Gains_Q16[ k ];
|
|
gain_squared = silk_ADD_SAT32( ResNrgPart, silk_SMMUL( gain, gain ) );
|
|
if( gain_squared < silk_int16_MAX ) {
|
|
/* recalculate with higher precision */
|
|
gain_squared = silk_SMLAWW( silk_LSHIFT( ResNrgPart, 16 ), gain, gain );
|
|
silk_assert( gain_squared > 0 );
|
|
gain = silk_SQRT_APPROX( gain_squared ); /* Q8 */
|
|
gain = silk_min( gain, silk_int32_MAX >> 8 );
|
|
psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 8 ); /* Q16 */
|
|
} else {
|
|
gain = silk_SQRT_APPROX( gain_squared ); /* Q0 */
|
|
gain = silk_min( gain, silk_int32_MAX >> 16 );
|
|
psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 16 ); /* Q16 */
|
|
}
|
|
}
|
|
|
|
/* Save unquantized gains and gain Index */
|
|
silk_memcpy( psEncCtrl->GainsUnq_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) );
|
|
psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex;
|
|
|
|
/* Quantize gains */
|
|
silk_gains_quant( psEnc->sCmn.indices.GainsIndices, psEncCtrl->Gains_Q16,
|
|
&psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr );
|
|
|
|
/* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */
|
|
if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
|
|
if( psEncCtrl->LTPredCodGain_Q7 + silk_RSHIFT( psEnc->sCmn.input_tilt_Q15, 8 ) > SILK_FIX_CONST( 1.0, 7 ) ) {
|
|
psEnc->sCmn.indices.quantOffsetType = 0;
|
|
} else {
|
|
psEnc->sCmn.indices.quantOffsetType = 1;
|
|
}
|
|
}
|
|
|
|
/* Quantizer boundary adjustment */
|
|
quant_offset_Q10 = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ];
|
|
psEncCtrl->Lambda_Q10 = SILK_FIX_CONST( LAMBDA_OFFSET, 10 )
|
|
+ silk_SMULBB( SILK_FIX_CONST( LAMBDA_DELAYED_DECISIONS, 10 ), psEnc->sCmn.nStatesDelayedDecision )
|
|
+ silk_SMULWB( SILK_FIX_CONST( LAMBDA_SPEECH_ACT, 18 ), psEnc->sCmn.speech_activity_Q8 )
|
|
+ silk_SMULWB( SILK_FIX_CONST( LAMBDA_INPUT_QUALITY, 12 ), psEncCtrl->input_quality_Q14 )
|
|
+ silk_SMULWB( SILK_FIX_CONST( LAMBDA_CODING_QUALITY, 12 ), psEncCtrl->coding_quality_Q14 )
|
|
+ silk_SMULWB( SILK_FIX_CONST( LAMBDA_QUANT_OFFSET, 16 ), quant_offset_Q10 );
|
|
|
|
silk_assert( psEncCtrl->Lambda_Q10 > 0 );
|
|
silk_assert( psEncCtrl->Lambda_Q10 < SILK_FIX_CONST( 2, 10 ) );
|
|
}
|