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/* Compute gain to make warped filter coefficients have a zero mean log frequency response on a */ 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* non-warped frequency scale. (So that it can be implemented with a minimum-phase monic filter.) */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Note: A monic filter is one with the first coefficient equal to 1.0. In Silk we omit the first */ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* coefficient in an array of coefficients, for monic filters. */ 393c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.comstatic OPUS_INLINE silk_float warped_gain( 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const silk_float *coefs, 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float lambda, 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int order 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) { 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i; 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float gain; 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org lambda = -lambda; 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain = coefs[ order - 1 ]; 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = order - 2; i >= 0; i-- ) { 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain = lambda * gain + coefs[ i ]; 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return (silk_float)( 1.0f / ( 1.0f - lambda * gain ) ); 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Convert warped filter coefficients to monic pseudo-warped coefficients and limit maximum */ 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* amplitude of monic warped coefficients by using bandwidth expansion on the true coefficients */ 573c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.comstatic OPUS_INLINE void warped_true2monic_coefs( 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float *coefs_syn, 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float *coefs_ana, 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float lambda, 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float limit, 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int order 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) { 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, iter, ind = 0; 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float tmp, maxabs, chirp, gain_syn, gain_ana; 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert to monic coefficients */ 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = order - 1; i > 0; i-- ) { 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i - 1 ] -= lambda * coefs_syn[ i ]; 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i - 1 ] -= lambda * coefs_ana[ i ]; 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_syn = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_syn[ 0 ] ); 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_ana = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_ana[ 0 ] ); 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < order; i++ ) { 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i ] *= gain_syn; 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i ] *= gain_ana; 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Limit */ 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( iter = 0; iter < 10; iter++ ) { 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Find maximum absolute value */ 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org maxabs = -1.0f; 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < order; i++ ) { 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org tmp = silk_max( silk_abs_float( coefs_syn[ i ] ), silk_abs_float( coefs_ana[ i ] ) ); 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( tmp > maxabs ) { 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org maxabs = tmp; 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ind = i; 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( maxabs <= limit ) { 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Coefficients are within range - done */ 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return; 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert back to true warped coefficients */ 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 1; i < order; i++ ) { 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i - 1 ] += lambda * coefs_syn[ i ]; 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i - 1 ] += lambda * coefs_ana[ i ]; 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_syn = 1.0f / gain_syn; 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_ana = 1.0f / gain_ana; 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < order; i++ ) { 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i ] *= gain_syn; 104885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i ] *= gain_ana; 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Apply bandwidth expansion */ 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org chirp = 0.99f - ( 0.8f + 0.1f * iter ) * ( maxabs - limit ) / ( maxabs * ( ind + 1 ) ); 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_bwexpander_FLP( coefs_syn, order, chirp ); 110885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_bwexpander_FLP( coefs_ana, order, chirp ); 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert to monic warped coefficients */ 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = order - 1; i > 0; i-- ) { 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i - 1 ] -= lambda * coefs_syn[ i ]; 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i - 1 ] -= lambda * coefs_ana[ i ]; 116885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 117885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_syn = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_syn[ 0 ] ); 118885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_ana = ( 1.0f - lambda * lambda ) / ( 1.0f + lambda * coefs_ana[ 0 ] ); 119885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < order; i++ ) { 120885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_syn[ i ] *= gain_syn; 121885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org coefs_ana[ i ] *= gain_ana; 122885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 123885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 124885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( 0 ); 125885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 126885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 127885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Compute noise shaping coefficients and initial gain values */ 128885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_noise_shape_analysis_FLP( 129885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ 130885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ 131885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const silk_float *pitch_res, /* I LPC residual from pitch analysis */ 132885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const silk_float *x /* I Input signal [frame_length + la_shape] */ 133885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 134885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 135885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_shape_state_FLP *psShapeSt = &psEnc->sShape; 136885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int k, nSamples; 137885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float SNR_adj_dB, HarmBoost, HarmShapeGain, Tilt; 138885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float nrg, pre_nrg, log_energy, log_energy_prev, energy_variation; 139885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float delta, BWExp1, BWExp2, gain_mult, gain_add, strength, b, warping; 140885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float x_windowed[ SHAPE_LPC_WIN_MAX ]; 141885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_float auto_corr[ MAX_SHAPE_LPC_ORDER + 1 ]; 142885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const silk_float *x_ptr, *pitch_res_ptr; 143885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 144885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Point to start of first LPC analysis block */ 145885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_ptr = x - psEnc->sCmn.la_shape; 146885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 147885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************/ 148885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* GAIN CONTROL */ 149885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************/ 150885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SNR_adj_dB = psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ); 151885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 152885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Input quality is the average of the quality in the lowest two VAD bands */ 153885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->input_quality = 0.5f * ( psEnc->sCmn.input_quality_bands_Q15[ 0 ] + psEnc->sCmn.input_quality_bands_Q15[ 1 ] ) * ( 1.0f / 32768.0f ); 154885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 155885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Coding quality level, between 0.0 and 1.0 */ 156885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->coding_quality = silk_sigmoid( 0.25f * ( SNR_adj_dB - 20.0f ) ); 157885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 158885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.useCBR == 0 ) { 159885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Reduce coding SNR during low speech activity */ 160885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org b = 1.0f - psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f ); 161885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SNR_adj_dB -= BG_SNR_DECR_dB * psEncCtrl->coding_quality * ( 0.5f + 0.5f * psEncCtrl->input_quality ) * b * b; 162885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 163885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 164885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 165885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Reduce gains for periodic signals */ 166885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SNR_adj_dB += HARM_SNR_INCR_dB * psEnc->LTPCorr; 167885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 168885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* For unvoiced signals and low-quality input, adjust the quality slower than SNR_dB setting */ 169885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SNR_adj_dB += ( -0.4f * psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) + 6.0f ) * ( 1.0f - psEncCtrl->input_quality ); 170885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 171885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 172885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************/ 173885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* SPARSENESS PROCESSING */ 174885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************/ 175885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set quantizer offset */ 176885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 1776b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org /* Initially set to 0; may be overruled in process_gains(..) */ 178885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.quantOffsetType = 0; 179885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->sparseness = 0.0f; 180885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 181885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Sparseness measure, based on relative fluctuations of energy per 2 milliseconds */ 182885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org nSamples = 2 * psEnc->sCmn.fs_kHz; 183885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org energy_variation = 0.0f; 184885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org log_energy_prev = 0.0f; 185885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pitch_res_ptr = pitch_res; 186885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < silk_SMULBB( SUB_FRAME_LENGTH_MS, psEnc->sCmn.nb_subfr ) / 2; k++ ) { 187885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org nrg = ( silk_float )nSamples + ( silk_float )silk_energy_FLP( pitch_res_ptr, nSamples ); 188885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org log_energy = silk_log2( nrg ); 189885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( k > 0 ) { 190885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org energy_variation += silk_abs_float( log_energy - log_energy_prev ); 191885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 192885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org log_energy_prev = log_energy; 193885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pitch_res_ptr += nSamples; 194885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 195885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->sparseness = silk_sigmoid( 0.4f * ( energy_variation - 5.0f ) ); 196885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 197885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set quantization offset depending on sparseness measure */ 198885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEncCtrl->sparseness > SPARSENESS_THRESHOLD_QNT_OFFSET ) { 199885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.quantOffsetType = 0; 200885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 201885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.quantOffsetType = 1; 202885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 203885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 204885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Increase coding SNR for sparse signals */ 205885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SNR_adj_dB += SPARSE_SNR_INCR_dB * ( psEncCtrl->sparseness - 0.5f ); 206885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 207885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 208885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*******************************/ 209885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Control bandwidth expansion */ 210885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*******************************/ 211885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* More BWE for signals with high prediction gain */ 212885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org strength = FIND_PITCH_WHITE_NOISE_FRACTION * psEncCtrl->predGain; /* between 0.0 and 1.0 */ 213885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org BWExp1 = BWExp2 = BANDWIDTH_EXPANSION / ( 1.0f + strength * strength ); 214885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org delta = LOW_RATE_BANDWIDTH_EXPANSION_DELTA * ( 1.0f - 0.75f * psEncCtrl->coding_quality ); 215885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org BWExp1 -= delta; 216885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org BWExp2 += delta; 217885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* BWExp1 will be applied after BWExp2, so make it relative */ 218885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org BWExp1 /= BWExp2; 219885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 220885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.warping_Q16 > 0 ) { 221885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Slightly more warping in analysis will move quantization noise up in frequency, where it's better masked */ 222885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org warping = (silk_float)psEnc->sCmn.warping_Q16 / 65536.0f + 0.01f * psEncCtrl->coding_quality; 223885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 224885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org warping = 0.0f; 225885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 226885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 227885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /********************************************/ 228885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Compute noise shaping AR coefs and gains */ 229885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /********************************************/ 230885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 231885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Apply window: sine slope followed by flat part followed by cosine slope */ 232885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int shift, slope_part, flat_part; 233885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org flat_part = psEnc->sCmn.fs_kHz * 3; 234885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org slope_part = ( psEnc->sCmn.shapeWinLength - flat_part ) / 2; 235885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 236885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_apply_sine_window_FLP( x_windowed, x_ptr, 1, slope_part ); 237885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org shift = slope_part; 238885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( x_windowed + shift, x_ptr + shift, flat_part * sizeof(silk_float) ); 239885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org shift += flat_part; 240885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_apply_sine_window_FLP( x_windowed + shift, x_ptr + shift, 2, slope_part ); 241885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 242885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Update pointer: next LPC analysis block */ 243885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_ptr += psEnc->sCmn.subfr_length; 244885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 245885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.warping_Q16 > 0 ) { 246885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate warped auto correlation */ 247885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_warped_autocorrelation_FLP( auto_corr, x_windowed, warping, 248885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder ); 249885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 250885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate regular auto correlation */ 251885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_autocorrelation_FLP( auto_corr, x_windowed, psEnc->sCmn.shapeWinLength, psEnc->sCmn.shapingLPCOrder + 1 ); 252885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 253885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 254885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Add white noise, as a fraction of energy */ 255885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org auto_corr[ 0 ] += auto_corr[ 0 ] * SHAPE_WHITE_NOISE_FRACTION; 256885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 257885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert correlations to prediction coefficients, and compute residual energy */ 258885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org nrg = silk_levinsondurbin_FLP( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], auto_corr, psEnc->sCmn.shapingLPCOrder ); 259885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] = ( silk_float )sqrt( nrg ); 260885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 261885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.warping_Q16 > 0 ) { 262885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Adjust gain for warping */ 263885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] *= warped_gain( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], warping, psEnc->sCmn.shapingLPCOrder ); 264885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 265885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 266885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Bandwidth expansion for synthesis filter shaping */ 267885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_bwexpander_FLP( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder, BWExp2 ); 268885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 269885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Compute noise shaping filter coefficients */ 270885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( 271885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], 272885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], 273885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.shapingLPCOrder * sizeof( silk_float ) ); 274885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 275885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Bandwidth expansion for analysis filter shaping */ 276885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_bwexpander_FLP( &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder, BWExp1 ); 277885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 278885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Ratio of prediction gains, in energy domain */ 279885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pre_nrg = silk_LPC_inverse_pred_gain_FLP( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder ); 280885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org nrg = silk_LPC_inverse_pred_gain_FLP( &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], psEnc->sCmn.shapingLPCOrder ); 281885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->GainsPre[ k ] = 1.0f - 0.7f * ( 1.0f - pre_nrg / nrg ); 282885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 283885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert to monic warped prediction coefficients and limit absolute values */ 284885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org warped_true2monic_coefs( &psEncCtrl->AR2[ k * MAX_SHAPE_LPC_ORDER ], &psEncCtrl->AR1[ k * MAX_SHAPE_LPC_ORDER ], 285885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org warping, 3.999f, psEnc->sCmn.shapingLPCOrder ); 286885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 287885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 288885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************/ 289885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Gain tweaking */ 290885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************/ 291885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Increase gains during low speech activity */ 292885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_mult = (silk_float)pow( 2.0f, -0.16f * SNR_adj_dB ); 293885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_add = (silk_float)pow( 2.0f, 0.16f * MIN_QGAIN_DB ); 294885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 295885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] *= gain_mult; 296885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Gains[ k ] += gain_add; 297885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 298885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 299885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_mult = 1.0f + INPUT_TILT + psEncCtrl->coding_quality * HIGH_RATE_INPUT_TILT; 300885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 301885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->GainsPre[ k ] *= gain_mult; 302885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 303885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 304885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /************************************************/ 305885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Control low-frequency shaping and noise tilt */ 306885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /************************************************/ 307885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Less low frequency shaping for noisy inputs */ 308885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org strength = LOW_FREQ_SHAPING * ( 1.0f + LOW_QUALITY_LOW_FREQ_SHAPING_DECR * ( psEnc->sCmn.input_quality_bands_Q15[ 0 ] * ( 1.0f / 32768.0f ) - 1.0f ) ); 309885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org strength *= psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f ); 310885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 311885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Reduce low frequencies quantization noise for periodic signals, depending on pitch lag */ 312885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*f = 400; freqz([1, -0.98 + 2e-4 * f], [1, -0.97 + 7e-4 * f], 2^12, Fs); axis([0, 1000, -10, 1])*/ 313885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 314885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org b = 0.2f / psEnc->sCmn.fs_kHz + 3.0f / psEncCtrl->pitchL[ k ]; 315885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_MA_shp[ k ] = -1.0f + b; 316885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_AR_shp[ k ] = 1.0f - b - b * strength; 317885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 318885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Tilt = - HP_NOISE_COEF - 319885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org (1 - HP_NOISE_COEF) * HARM_HP_NOISE_COEF * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f ); 320885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 321885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org b = 1.3f / psEnc->sCmn.fs_kHz; 322885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_MA_shp[ 0 ] = -1.0f + b; 323885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_AR_shp[ 0 ] = 1.0f - b - b * strength * 0.6f; 324885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 1; k < psEnc->sCmn.nb_subfr; k++ ) { 325885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_MA_shp[ k ] = psEncCtrl->LF_MA_shp[ 0 ]; 326885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->LF_AR_shp[ k ] = psEncCtrl->LF_AR_shp[ 0 ]; 327885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 328885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Tilt = -HP_NOISE_COEF; 329885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 330885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 331885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************************/ 332885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* HARMONIC SHAPING CONTROL */ 333885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /****************************/ 334885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Control boosting of harmonic frequencies */ 335885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmBoost = LOW_RATE_HARMONIC_BOOST * ( 1.0f - psEncCtrl->coding_quality ) * psEnc->LTPCorr; 336885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 337885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* More harmonic boost for noisy input signals */ 338885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmBoost += LOW_INPUT_QUALITY_HARMONIC_BOOST * ( 1.0f - psEncCtrl->input_quality ); 339885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 340885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( USE_HARM_SHAPING && psEnc->sCmn.indices.signalType == TYPE_VOICED ) { 341885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Harmonic noise shaping */ 342885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmShapeGain = HARMONIC_SHAPING; 343885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 344885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* More harmonic noise shaping for high bitrates or noisy input */ 345885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmShapeGain += HIGH_RATE_OR_LOW_QUALITY_HARMONIC_SHAPING * 346885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ( 1.0f - ( 1.0f - psEncCtrl->coding_quality ) * psEncCtrl->input_quality ); 347885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 348885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Less harmonic noise shaping for less periodic signals */ 349885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmShapeGain *= ( silk_float )sqrt( psEnc->LTPCorr ); 350885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 351885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org HarmShapeGain = 0.0f; 352885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 353885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 354885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************/ 355885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Smooth over subframes */ 356885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************/ 357885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { 358885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psShapeSt->HarmBoost_smth += SUBFR_SMTH_COEF * ( HarmBoost - psShapeSt->HarmBoost_smth ); 359885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->HarmBoost[ k ] = psShapeSt->HarmBoost_smth; 360885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psShapeSt->HarmShapeGain_smth += SUBFR_SMTH_COEF * ( HarmShapeGain - psShapeSt->HarmShapeGain_smth ); 361885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->HarmShapeGain[ k ] = psShapeSt->HarmShapeGain_smth; 362885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psShapeSt->Tilt_smth += SUBFR_SMTH_COEF * ( Tilt - psShapeSt->Tilt_smth ); 363885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->Tilt[ k ] = psShapeSt->Tilt_smth; 364885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 365885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 366