1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************************************************************** 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCopyright (c) 2006-2011, Skype Limited. All rights reserved. 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgRedistribution and use in source and binary forms, with or without 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgmodification, are permitted provided that the following conditions 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgare met: 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions of source code must retain the above copyright notice, 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgthis list of conditions and the following disclaimer. 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions in binary form must reproduce the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnotice, this list of conditions and the following disclaimer in the 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgdocumentation and/or other materials provided with the distribution. 11e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org- Neither the name of Internet Society, IETF or IETF Trust, nor the 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnames of specific contributors, may be used to endorse or promote 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgproducts derived from this software without specific prior written 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgpermission. 15e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgLIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgPOSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org***********************************************************************/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "main_FLP.h" 33885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "tuning_parameters.h" 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Processing of gains */ 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_process_gains_FLP( 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int condCoding /* I The type of conditional coding to use */ 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_shape_state_FLP *psShapeSt = &psEnc->sShape; 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int k; 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 pGains_Q16[ MAX_NB_SUBFR ]; 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float s, InvMaxSqrVal, gain, quant_offset; 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Gain reduction when LTP coding gain is high */ 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org s = 1.0f - 0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] *= s; 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Limit the quantized signal */ 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org InvMaxSqrVal = ( silk_float )( pow( 2.0f, 0.33f * ( 21.0f - psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) ) ) / psEnc->sCmn.subfr_length ); 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Soft limit on ratio residual energy and squared gains */ 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain = psEncCtrl->Gains[ k ]; 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain = ( silk_float )sqrt( gain * gain + psEncCtrl->ResNrg[ k ] * InvMaxSqrVal ); 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] = silk_min_float( gain, 32767.0f ); 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Prepare gains for noise shaping quantization */ 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pGains_Q16[ k ] = (opus_int32)( psEncCtrl->Gains[ k ] * 65536.0f ); 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Save unquantized gains and gain Index */ 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( psEncCtrl->GainsUnq_Q16, pGains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex; 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Quantize gains */ 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_gains_quant( psEnc->sCmn.indices.GainsIndices, pGains_Q16, 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org &psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */ 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] = pGains_Q16[ k ] / 65536.0f; 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */ 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEncCtrl->LTPredCodGain + psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f ) > 1.0f ) { 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.quantOffsetType = 0; 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.quantOffsetType = 1; 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Quantizer boundary adjustment */ 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org quant_offset = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ] / 1024.0f; 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Lambda = LAMBDA_OFFSET 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org + LAMBDA_DELAYED_DECISIONS * psEnc->sCmn.nStatesDelayedDecision 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org + LAMBDA_SPEECH_ACT * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f ) 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org + LAMBDA_INPUT_QUALITY * psEncCtrl->input_quality 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org + LAMBDA_CODING_QUALITY * psEncCtrl->coding_quality 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org + LAMBDA_QUANT_OFFSET * quant_offset; 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( psEncCtrl->Lambda > 0.0f ); 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( psEncCtrl->Lambda < 2.0f ); 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 104