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_FIX.h" 33e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org#include "stack_alloc.h" 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "tuning_parameters.h" 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Find pitch lags */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_find_pitch_lags_FIX( 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_state_FIX *psEnc, /* I/O encoder state */ 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 res[], /* O residual */ 413c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com const opus_int16 x[], /* I Speech signal */ 423c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com int arch /* I Run-time architecture */ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int buf_len, i, scale; 46e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org opus_int32 thrhld_Q13, res_nrg; 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int16 *x_buf, *x_buf_ptr; 48e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org VARDECL( opus_int16, Wsig ); 49e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org opus_int16 *Wsig_ptr; 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 auto_corr[ MAX_FIND_PITCH_LPC_ORDER + 1 ]; 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 rc_Q15[ MAX_FIND_PITCH_LPC_ORDER ]; 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 A_Q24[ MAX_FIND_PITCH_LPC_ORDER ]; 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 A_Q12[ MAX_FIND_PITCH_LPC_ORDER ]; 54e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org SAVE_STACK; 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /******************************************/ 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set up buffer lengths etc based on Fs */ 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /******************************************/ 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org buf_len = psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length + psEnc->sCmn.ltp_mem_length; 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 616b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org /* Safety check */ 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( buf_len >= psEnc->sCmn.pitch_LPC_win_length ); 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_buf = x - psEnc->sCmn.ltp_mem_length; 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************************/ 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Estimate LPC AR coefficients */ 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*************************************/ 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate windowed signal */ 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 72e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org ALLOC( Wsig, psEnc->sCmn.pitch_LPC_win_length, opus_int16 ); 73e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* First LA_LTP samples */ 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_buf_ptr = x_buf + buf_len - psEnc->sCmn.pitch_LPC_win_length; 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Wsig_ptr = Wsig; 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_apply_sine_window( Wsig_ptr, x_buf_ptr, 1, psEnc->sCmn.la_pitch ); 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Middle un - windowed samples */ 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Wsig_ptr += psEnc->sCmn.la_pitch; 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_buf_ptr += psEnc->sCmn.la_pitch; 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( Wsig_ptr, x_buf_ptr, ( psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ) ) * sizeof( opus_int16 ) ); 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Last LA_LTP samples */ 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Wsig_ptr += psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ); 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org x_buf_ptr += psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ); 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_apply_sine_window( Wsig_ptr, x_buf_ptr, 2, psEnc->sCmn.la_pitch ); 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate autocorrelation sequence */ 903c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com silk_autocorr( auto_corr, &scale, Wsig, psEnc->sCmn.pitch_LPC_win_length, psEnc->sCmn.pitchEstimationLPCOrder + 1, arch ); 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Add white noise, as fraction of energy */ 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org auto_corr[ 0 ] = silk_SMLAWB( auto_corr[ 0 ], auto_corr[ 0 ], SILK_FIX_CONST( FIND_PITCH_WHITE_NOISE_FRACTION, 16 ) ) + 1; 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate the reflection coefficients using schur */ 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org res_nrg = silk_schur( rc_Q15, auto_corr, psEnc->sCmn.pitchEstimationLPCOrder ); 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Prediction gain */ 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEncCtrl->predGain_Q16 = silk_DIV32_varQ( auto_corr[ 0 ], silk_max_int( res_nrg, 1 ), 16 ); 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert reflection coefficients to prediction coefficients */ 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_k2a( A_Q24, rc_Q15, psEnc->sCmn.pitchEstimationLPCOrder ); 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 104885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert From 32 bit Q24 to 16 bit Q12 coefs */ 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < psEnc->sCmn.pitchEstimationLPCOrder; i++ ) { 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org A_Q12[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT( A_Q24[ i ], 12 ) ); 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Do BWE */ 1106b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org silk_bwexpander( A_Q12, psEnc->sCmn.pitchEstimationLPCOrder, SILK_FIX_CONST( FIND_PITCH_BANDWIDTH_EXPANSION, 16 ) ); 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************************************/ 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* LPC analysis filtering */ 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************************************/ 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_LPC_analysis_filter( res, x_buf, A_Q12, buf_len, psEnc->sCmn.pitchEstimationLPCOrder ); 116885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 117885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psEnc->sCmn.indices.signalType != TYPE_NO_VOICE_ACTIVITY && psEnc->sCmn.first_frame_after_reset == 0 ) { 118885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Threshold for pitch estimator */ 119e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = SILK_FIX_CONST( 0.6, 13 ); 120e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = silk_SMLABB( thrhld_Q13, SILK_FIX_CONST( -0.004, 13 ), psEnc->sCmn.pitchEstimationLPCOrder ); 121e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = silk_SMLAWB( thrhld_Q13, SILK_FIX_CONST( -0.1, 21 ), psEnc->sCmn.speech_activity_Q8 ); 122e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = silk_SMLABB( thrhld_Q13, SILK_FIX_CONST( -0.15, 13 ), silk_RSHIFT( psEnc->sCmn.prevSignalType, 1 ) ); 123e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = silk_SMLAWB( thrhld_Q13, SILK_FIX_CONST( -0.1, 14 ), psEnc->sCmn.input_tilt_Q15 ); 124e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org thrhld_Q13 = silk_SAT16( thrhld_Q13 ); 125885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 126885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************************************/ 127885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Call pitch estimator */ 128885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /*****************************************/ 129885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( silk_pitch_analysis_core( res, psEncCtrl->pitchL, &psEnc->sCmn.indices.lagIndex, &psEnc->sCmn.indices.contourIndex, 130885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org &psEnc->LTPCorr_Q15, psEnc->sCmn.prevLag, psEnc->sCmn.pitchEstimationThreshold_Q16, 1313c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com (opus_int)thrhld_Q13, psEnc->sCmn.fs_kHz, psEnc->sCmn.pitchEstimationComplexity, psEnc->sCmn.nb_subfr, 1323c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com psEnc->sCmn.arch) == 0 ) 133885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 134885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.signalType = TYPE_VOICED; 135885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 136885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.signalType = TYPE_UNVOICED; 137885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 138885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 139885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( psEncCtrl->pitchL, 0, sizeof( psEncCtrl->pitchL ) ); 140885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.lagIndex = 0; 141885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->sCmn.indices.contourIndex = 0; 142885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psEnc->LTPCorr_Q15 = 0; 143885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 144e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org RESTORE_STACK; 145885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 146