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.h" 336b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org#include "stack_alloc.h" 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/**********************************************************/ 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Core decoder. Performs inverse NSQ operation LTP + LPC */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/**********************************************************/ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgvoid silk_decode_core( 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_state *psDec, /* I/O Decoder state */ 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_control *psDecCtrl, /* I Decoder control */ 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 xq[], /* O Decoded speech */ 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse signal */ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, k, lag = 0, start_idx, sLTP_buf_idx, NLSF_interpolation_flag, signalType; 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 *A_Q12, *B_Q14, *pxq, A_Q12_tmp[ MAX_LPC_ORDER ]; 476b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int16, sLTP ); 486b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int32, sLTP_Q15 ); 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 LTP_pred_Q13, LPC_pred_Q10, Gain_Q10, inv_gain_Q31, gain_adj_Q16, rand_seed, offset_Q10; 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 *pred_lag_ptr, *pexc_Q14, *pres_Q14; 516b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int32, res_Q14 ); 526b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int32, sLPC_Q14 ); 536b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org SAVE_STACK; 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( psDec->prev_gain_Q16 != 0 ); 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 576b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( sLTP, psDec->ltp_mem_length, opus_int16 ); 586b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( sLTP_Q15, psDec->ltp_mem_length + psDec->frame_length, opus_int32 ); 596b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( res_Q14, psDec->subfr_length, opus_int32 ); 606b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( sLPC_Q14, psDec->subfr_length + MAX_LPC_ORDER, opus_int32 ); 616b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org offset_Q10 = silk_Quantization_Offsets_Q10[ psDec->indices.signalType >> 1 ][ psDec->indices.quantOffsetType ]; 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->indices.NLSFInterpCoef_Q2 < 1 << 2 ) { 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org NLSF_interpolation_flag = 1; 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org NLSF_interpolation_flag = 0; 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode excitation */ 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org rand_seed = psDec->indices.Seed; 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < psDec->frame_length; i++ ) { 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org rand_seed = silk_RAND( rand_seed ); 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->exc_Q14[ i ] = silk_LSHIFT( (opus_int32)pulses[ i ], 14 ); 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->exc_Q14[ i ] > 0 ) { 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->exc_Q14[ i ] -= QUANT_LEVEL_ADJUST_Q10 << 4; 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->exc_Q14[ i ] < 0 ) { 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->exc_Q14[ i ] += QUANT_LEVEL_ADJUST_Q10 << 4; 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->exc_Q14[ i ] += offset_Q10 << 4; 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( rand_seed < 0 ) { 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->exc_Q14[ i ] = -psDec->exc_Q14[ i ]; 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org rand_seed = silk_ADD32_ovflw( rand_seed, pulses[ i ] ); 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Copy LPC state */ 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( sLPC_Q14, psDec->sLPC_Q14_buf, MAX_LPC_ORDER * sizeof( opus_int32 ) ); 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pexc_Q14 = psDec->exc_Q14; 93885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pxq = xq; 94885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLTP_buf_idx = psDec->ltp_mem_length; 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Loop over subframes */ 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( k = 0; k < psDec->nb_subfr; k++ ) { 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pres_Q14 = res_Q14; 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org A_Q12 = psDecCtrl->PredCoef_Q12[ k >> 1 ]; 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Preload LPC coeficients to array on stack. Gives small performance gain */ 101885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( A_Q12_tmp, A_Q12, psDec->LPC_order * sizeof( opus_int16 ) ); 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org B_Q14 = &psDecCtrl->LTPCoef_Q14[ k * LTP_ORDER ]; 103885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org signalType = psDec->indices.signalType; 104885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Gain_Q10 = silk_RSHIFT( psDecCtrl->Gains_Q16[ k ], 6 ); 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org inv_gain_Q31 = silk_INVERSE32_varQ( psDecCtrl->Gains_Q16[ k ], 47 ); 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Calculate gain adjustment factor */ 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDecCtrl->Gains_Q16[ k ] != psDec->prev_gain_Q16 ) { 110885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_adj_Q16 = silk_DIV32_varQ( psDec->prev_gain_Q16, psDecCtrl->Gains_Q16[ k ], 16 ); 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Scale short term state */ 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < MAX_LPC_ORDER; i++ ) { 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, sLPC_Q14[ i ] ); 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 116885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 117885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org gain_adj_Q16 = (opus_int32)1 << 16; 118885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 119885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 120885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Save inv_gain */ 121885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( inv_gain_Q31 != 0 ); 122885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->prev_gain_Q16 = psDecCtrl->Gains_Q16[ k ]; 123885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 124885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Avoid abrupt transition from voiced PLC to unvoiced normal decoding */ 125885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->lossCnt && psDec->prevSignalType == TYPE_VOICED && 126885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->indices.signalType != TYPE_VOICED && k < MAX_NB_SUBFR/2 ) { 127885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 128885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( B_Q14, 0, LTP_ORDER * sizeof( opus_int16 ) ); 129885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org B_Q14[ LTP_ORDER/2 ] = SILK_FIX_CONST( 0.25, 14 ); 130885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 131885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org signalType = TYPE_VOICED; 132885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDecCtrl->pitchL[ k ] = psDec->lagPrev; 133885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 134885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 135885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( signalType == TYPE_VOICED ) { 136885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Voiced */ 137885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org lag = psDecCtrl->pitchL[ k ]; 138885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 139885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Re-whitening */ 140885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( k == 0 || ( k == 2 && NLSF_interpolation_flag ) ) { 141885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Rewhiten with new A coefs */ 142885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org start_idx = psDec->ltp_mem_length - lag - psDec->LPC_order - LTP_ORDER / 2; 143885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( start_idx > 0 ); 144885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 145885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( k == 2 ) { 146885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( &psDec->outBuf[ psDec->ltp_mem_length ], xq, 2 * psDec->subfr_length * sizeof( opus_int16 ) ); 147885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 148885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 149885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_LPC_analysis_filter( &sLTP[ start_idx ], &psDec->outBuf[ start_idx + k * psDec->subfr_length ], 150885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org A_Q12, psDec->ltp_mem_length - start_idx, psDec->LPC_order ); 151885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 152885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* After rewhitening the LTP state is unscaled */ 153885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( k == 0 ) { 154885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Do LTP downscaling to reduce inter-packet dependency */ 155885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, psDecCtrl->LTP_scale_Q14 ), 2 ); 156885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 157885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < lag + LTP_ORDER/2; i++ ) { 158885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLTP_Q15[ sLTP_buf_idx - i - 1 ] = silk_SMULWB( inv_gain_Q31, sLTP[ psDec->ltp_mem_length - i - 1 ] ); 159885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 160885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 161885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Update LTP state when Gain changes */ 162885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( gain_adj_Q16 != (opus_int32)1 << 16 ) { 163885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < lag + LTP_ORDER/2; i++ ) { 164885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLTP_Q15[ sLTP_buf_idx - i - 1 ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ sLTP_buf_idx - i - 1 ] ); 165885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 166885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 167885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 168885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 169885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 170885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Long-term prediction */ 171885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( signalType == TYPE_VOICED ) { 172885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set up pointer */ 173885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pred_lag_ptr = &sLTP_Q15[ sLTP_buf_idx - lag + LTP_ORDER / 2 ]; 174885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < psDec->subfr_length; i++ ) { 175885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Unrolled loop */ 176885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ 177885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = 2; 178885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ 0 ], B_Q14[ 0 ] ); 179885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -1 ], B_Q14[ 1 ] ); 180885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -2 ], B_Q14[ 2 ] ); 181885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -3 ], B_Q14[ 3 ] ); 182885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -4 ], B_Q14[ 4 ] ); 183885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pred_lag_ptr++; 184885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 185885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Generate LPC excitation */ 186885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pres_Q14[ i ] = silk_ADD_LSHIFT32( pexc_Q14[ i ], LTP_pred_Q13, 1 ); 187885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 188885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Update states */ 189885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLTP_Q15[ sLTP_buf_idx ] = silk_LSHIFT( pres_Q14[ i ], 1 ); 190885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLTP_buf_idx++; 191885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 192885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 193885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pres_Q14 = pexc_Q14; 194885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 195885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 196885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < psDec->subfr_length; i++ ) { 197885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Short-term prediction */ 198885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( psDec->LPC_order == 10 || psDec->LPC_order == 16 ); 199885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ 200885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_RSHIFT( psDec->LPC_order, 1 ); 201885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 1 ], A_Q12_tmp[ 0 ] ); 202885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 2 ], A_Q12_tmp[ 1 ] ); 203885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 3 ], A_Q12_tmp[ 2 ] ); 204885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 4 ], A_Q12_tmp[ 3 ] ); 205885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 5 ], A_Q12_tmp[ 4 ] ); 206885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 6 ], A_Q12_tmp[ 5 ] ); 207885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 7 ], A_Q12_tmp[ 6 ] ); 208885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 8 ], A_Q12_tmp[ 7 ] ); 209885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 9 ], A_Q12_tmp[ 8 ] ); 210885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 10 ], A_Q12_tmp[ 9 ] ); 211885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( psDec->LPC_order == 16 ) { 212885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 11 ], A_Q12_tmp[ 10 ] ); 213885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 12 ], A_Q12_tmp[ 11 ] ); 214885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 13 ], A_Q12_tmp[ 12 ] ); 215885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 14 ], A_Q12_tmp[ 13 ] ); 216885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 15 ], A_Q12_tmp[ 14 ] ); 217885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, sLPC_Q14[ MAX_LPC_ORDER + i - 16 ], A_Q12_tmp[ 15 ] ); 218885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 219885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 220885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Add prediction to LPC excitation */ 221885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org sLPC_Q14[ MAX_LPC_ORDER + i ] = silk_ADD_LSHIFT32( pres_Q14[ i ], LPC_pred_Q10, 4 ); 222885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 223885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Scale with gain */ 224885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pxq[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( sLPC_Q14[ MAX_LPC_ORDER + i ], Gain_Q10 ), 8 ) ); 225885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 226885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 227885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* DEBUG_STORE_DATA( dec.pcm, pxq, psDec->subfr_length * sizeof( opus_int16 ) ) */ 228885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 229885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Update LPC filter state */ 230885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( sLPC_Q14, &sLPC_Q14[ psDec->subfr_length ], MAX_LPC_ORDER * sizeof( opus_int32 ) ); 231885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pexc_Q14 += psDec->subfr_length; 232885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org pxq += psDec->subfr_length; 233885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 234885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 235885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Save LPC state */ 236885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( psDec->sLPC_Q14_buf, sLPC_Q14, MAX_LPC_ORDER * sizeof( opus_int32 ) ); 2376b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org RESTORE_STACK; 238885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 239