mirror of
https://github.com/UberGames/ioef.git
synced 2024-12-11 05:11:29 +00:00
103 lines
5 KiB
C
103 lines
5 KiB
C
/***********************************************************************
|
|
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_FLP.h"
|
|
#include "tuning_parameters.h"
|
|
|
|
/* Processing of gains */
|
|
void silk_process_gains_FLP(
|
|
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
|
|
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
|
|
opus_int condCoding /* I The type of conditional coding to use */
|
|
)
|
|
{
|
|
silk_shape_state_FLP *psShapeSt = &psEnc->sShape;
|
|
opus_int k;
|
|
opus_int32 pGains_Q16[ MAX_NB_SUBFR ];
|
|
silk_float s, InvMaxSqrVal, gain, quant_offset;
|
|
|
|
/* Gain reduction when LTP coding gain is high */
|
|
if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) {
|
|
s = 1.0f - 0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) );
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
psEncCtrl->Gains[ k ] *= s;
|
|
}
|
|
}
|
|
|
|
/* Limit the quantized signal */
|
|
InvMaxSqrVal = ( silk_float )( pow( 2.0f, 0.33f * ( 21.0f - psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) ) ) / psEnc->sCmn.subfr_length );
|
|
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
/* Soft limit on ratio residual energy and squared gains */
|
|
gain = psEncCtrl->Gains[ k ];
|
|
gain = ( silk_float )sqrt( gain * gain + psEncCtrl->ResNrg[ k ] * InvMaxSqrVal );
|
|
psEncCtrl->Gains[ k ] = silk_min_float( gain, 32767.0f );
|
|
}
|
|
|
|
/* Prepare gains for noise shaping quantization */
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
pGains_Q16[ k ] = (opus_int32)( psEncCtrl->Gains[ k ] * 65536.0f );
|
|
}
|
|
|
|
/* Save unquantized gains and gain Index */
|
|
silk_memcpy( psEncCtrl->GainsUnq_Q16, pGains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) );
|
|
psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex;
|
|
|
|
/* Quantize gains */
|
|
silk_gains_quant( psEnc->sCmn.indices.GainsIndices, pGains_Q16,
|
|
&psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr );
|
|
|
|
/* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */
|
|
for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
|
|
psEncCtrl->Gains[ k ] = pGains_Q16[ k ] / 65536.0f;
|
|
}
|
|
|
|
/* 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 + psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f ) > 1.0f ) {
|
|
psEnc->sCmn.indices.quantOffsetType = 0;
|
|
} else {
|
|
psEnc->sCmn.indices.quantOffsetType = 1;
|
|
}
|
|
}
|
|
|
|
/* Quantizer boundary adjustment */
|
|
quant_offset = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ] / 1024.0f;
|
|
psEncCtrl->Lambda = LAMBDA_OFFSET
|
|
+ LAMBDA_DELAYED_DECISIONS * psEnc->sCmn.nStatesDelayedDecision
|
|
+ LAMBDA_SPEECH_ACT * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f )
|
|
+ LAMBDA_INPUT_QUALITY * psEncCtrl->input_quality
|
|
+ LAMBDA_CODING_QUALITY * psEncCtrl->coding_quality
|
|
+ LAMBDA_QUANT_OFFSET * quant_offset;
|
|
|
|
silk_assert( psEncCtrl->Lambda > 0.0f );
|
|
silk_assert( psEncCtrl->Lambda < 2.0f );
|
|
}
|