diff options
Diffstat (limited to 'src/opus-1.0.2/silk/float/process_gains_FLP.c')
| -rw-r--r-- | src/opus-1.0.2/silk/float/process_gains_FLP.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/src/opus-1.0.2/silk/float/process_gains_FLP.c b/src/opus-1.0.2/silk/float/process_gains_FLP.c deleted file mode 100644 index d572a4cd..00000000 --- a/src/opus-1.0.2/silk/float/process_gains_FLP.c +++ /dev/null @@ -1,103 +0,0 @@ -/*********************************************************************** -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 ); -} |