michael@0: /*********************************************************************** michael@0: Copyright (c) 2006-2011, Skype Limited. All rights reserved. michael@0: Redistribution and use in source and binary forms, with or without michael@0: modification, are permitted provided that the following conditions michael@0: are met: michael@0: - Redistributions of source code must retain the above copyright notice, michael@0: this list of conditions and the following disclaimer. michael@0: - Redistributions in binary form must reproduce the above copyright michael@0: notice, this list of conditions and the following disclaimer in the michael@0: documentation and/or other materials provided with the distribution. michael@0: - Neither the name of Internet Society, IETF or IETF Trust, nor the michael@0: names of specific contributors, may be used to endorse or promote michael@0: products derived from this software without specific prior written michael@0: permission. michael@0: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" michael@0: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE michael@0: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE michael@0: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE michael@0: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR michael@0: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF michael@0: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS michael@0: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN michael@0: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) michael@0: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE michael@0: POSSIBILITY OF SUCH DAMAGE. michael@0: ***********************************************************************/ michael@0: michael@0: #ifdef HAVE_CONFIG_H michael@0: #include "config.h" michael@0: #endif michael@0: michael@0: #include "main.h" michael@0: #include "stack_alloc.h" michael@0: michael@0: typedef struct { michael@0: opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ]; michael@0: opus_int32 RandState[ DECISION_DELAY ]; michael@0: opus_int32 Q_Q10[ DECISION_DELAY ]; michael@0: opus_int32 Xq_Q14[ DECISION_DELAY ]; michael@0: opus_int32 Pred_Q15[ DECISION_DELAY ]; michael@0: opus_int32 Shape_Q14[ DECISION_DELAY ]; michael@0: opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ]; michael@0: opus_int32 LF_AR_Q14; michael@0: opus_int32 Seed; michael@0: opus_int32 SeedInit; michael@0: opus_int32 RD_Q10; michael@0: } NSQ_del_dec_struct; michael@0: michael@0: typedef struct { michael@0: opus_int32 Q_Q10; michael@0: opus_int32 RD_Q10; michael@0: opus_int32 xq_Q14; michael@0: opus_int32 LF_AR_Q14; michael@0: opus_int32 sLTP_shp_Q14; michael@0: opus_int32 LPC_exc_Q14; michael@0: } NSQ_sample_struct; michael@0: michael@0: typedef NSQ_sample_struct NSQ_sample_pair[ 2 ]; michael@0: michael@0: static OPUS_INLINE void silk_nsq_del_dec_scale_states( michael@0: const silk_encoder_state *psEncC, /* I Encoder State */ michael@0: silk_nsq_state *NSQ, /* I/O NSQ state */ michael@0: NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ michael@0: const opus_int32 x_Q3[], /* I Input in Q3 */ michael@0: opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ michael@0: const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ michael@0: opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ michael@0: opus_int subfr, /* I Subframe number */ michael@0: opus_int nStatesDelayedDecision, /* I Number of del dec states */ michael@0: const opus_int LTP_scale_Q14, /* I LTP state scaling */ michael@0: const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ michael@0: const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ michael@0: const opus_int signal_type, /* I Signal type */ michael@0: const opus_int decisionDelay /* I Decision delay */ michael@0: ); michael@0: michael@0: /******************************************/ michael@0: /* Noise shape quantizer for one subframe */ michael@0: /******************************************/ michael@0: static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( michael@0: silk_nsq_state *NSQ, /* I/O NSQ state */ michael@0: NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ michael@0: opus_int signalType, /* I Signal type */ michael@0: const opus_int32 x_Q10[], /* I */ michael@0: opus_int8 pulses[], /* O */ michael@0: opus_int16 xq[], /* O */ michael@0: opus_int32 sLTP_Q15[], /* I/O LTP filter state */ michael@0: opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ michael@0: const opus_int16 a_Q12[], /* I Short term prediction coefs */ michael@0: const opus_int16 b_Q14[], /* I Long term prediction coefs */ michael@0: const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ michael@0: opus_int lag, /* I Pitch lag */ michael@0: opus_int32 HarmShapeFIRPacked_Q14, /* I */ michael@0: opus_int Tilt_Q14, /* I Spectral tilt */ michael@0: opus_int32 LF_shp_Q14, /* I */ michael@0: opus_int32 Gain_Q16, /* I */ michael@0: opus_int Lambda_Q10, /* I */ michael@0: opus_int offset_Q10, /* I */ michael@0: opus_int length, /* I Input length */ michael@0: opus_int subfr, /* I Subframe number */ michael@0: opus_int shapingLPCOrder, /* I Shaping LPC filter order */ michael@0: opus_int predictLPCOrder, /* I Prediction filter order */ michael@0: opus_int warping_Q16, /* I */ michael@0: opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ michael@0: opus_int *smpl_buf_idx, /* I Index to newest samples in buffers */ michael@0: opus_int decisionDelay /* I */ michael@0: ); michael@0: michael@0: void silk_NSQ_del_dec( michael@0: const silk_encoder_state *psEncC, /* I/O Encoder State */ michael@0: silk_nsq_state *NSQ, /* I/O NSQ state */ michael@0: SideInfoIndices *psIndices, /* I/O Quantization Indices */ michael@0: const opus_int32 x_Q3[], /* I Prefiltered input signal */ michael@0: opus_int8 pulses[], /* O Quantized pulse signal */ michael@0: const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ michael@0: const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ michael@0: const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ michael@0: const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ michael@0: const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ michael@0: const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ michael@0: const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ michael@0: const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ michael@0: const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ michael@0: const opus_int LTP_scale_Q14 /* I LTP state scaling */ michael@0: ) michael@0: { michael@0: opus_int i, k, lag, start_idx, LSF_interpolation_flag, Winner_ind, subfr; michael@0: opus_int last_smple_idx, smpl_buf_idx, decisionDelay; michael@0: const opus_int16 *A_Q12, *B_Q14, *AR_shp_Q13; michael@0: opus_int16 *pxq; michael@0: VARDECL( opus_int32, sLTP_Q15 ); michael@0: VARDECL( opus_int16, sLTP ); michael@0: opus_int32 HarmShapeFIRPacked_Q14; michael@0: opus_int offset_Q10; michael@0: opus_int32 RDmin_Q10, Gain_Q10; michael@0: VARDECL( opus_int32, x_sc_Q10 ); michael@0: VARDECL( opus_int32, delayedGain_Q10 ); michael@0: VARDECL( NSQ_del_dec_struct, psDelDec ); michael@0: NSQ_del_dec_struct *psDD; michael@0: SAVE_STACK; michael@0: michael@0: /* Set unvoiced lag to the previous one, overwrite later for voiced */ michael@0: lag = NSQ->lagPrev; michael@0: michael@0: silk_assert( NSQ->prev_gain_Q16 != 0 ); michael@0: michael@0: /* Initialize delayed decision states */ michael@0: ALLOC( psDelDec, psEncC->nStatesDelayedDecision, NSQ_del_dec_struct ); michael@0: silk_memset( psDelDec, 0, psEncC->nStatesDelayedDecision * sizeof( NSQ_del_dec_struct ) ); michael@0: for( k = 0; k < psEncC->nStatesDelayedDecision; k++ ) { michael@0: psDD = &psDelDec[ k ]; michael@0: psDD->Seed = ( k + psIndices->Seed ) & 3; michael@0: psDD->SeedInit = psDD->Seed; michael@0: psDD->RD_Q10 = 0; michael@0: psDD->LF_AR_Q14 = NSQ->sLF_AR_shp_Q14; michael@0: psDD->Shape_Q14[ 0 ] = NSQ->sLTP_shp_Q14[ psEncC->ltp_mem_length - 1 ]; michael@0: silk_memcpy( psDD->sLPC_Q14, NSQ->sLPC_Q14, NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); michael@0: silk_memcpy( psDD->sAR2_Q14, NSQ->sAR2_Q14, sizeof( NSQ->sAR2_Q14 ) ); michael@0: } michael@0: michael@0: offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ]; michael@0: smpl_buf_idx = 0; /* index of oldest samples */ michael@0: michael@0: decisionDelay = silk_min_int( DECISION_DELAY, psEncC->subfr_length ); michael@0: michael@0: /* For voiced frames limit the decision delay to lower than the pitch lag */ michael@0: if( psIndices->signalType == TYPE_VOICED ) { michael@0: for( k = 0; k < psEncC->nb_subfr; k++ ) { michael@0: decisionDelay = silk_min_int( decisionDelay, pitchL[ k ] - LTP_ORDER / 2 - 1 ); michael@0: } michael@0: } else { michael@0: if( lag > 0 ) { michael@0: decisionDelay = silk_min_int( decisionDelay, lag - LTP_ORDER / 2 - 1 ); michael@0: } michael@0: } michael@0: michael@0: if( psIndices->NLSFInterpCoef_Q2 == 4 ) { michael@0: LSF_interpolation_flag = 0; michael@0: } else { michael@0: LSF_interpolation_flag = 1; michael@0: } michael@0: michael@0: ALLOC( sLTP_Q15, michael@0: psEncC->ltp_mem_length + psEncC->frame_length, opus_int32 ); michael@0: ALLOC( sLTP, psEncC->ltp_mem_length + psEncC->frame_length, opus_int16 ); michael@0: ALLOC( x_sc_Q10, psEncC->subfr_length, opus_int32 ); michael@0: ALLOC( delayedGain_Q10, DECISION_DELAY, opus_int32 ); michael@0: /* Set up pointers to start of sub frame */ michael@0: pxq = &NSQ->xq[ psEncC->ltp_mem_length ]; michael@0: NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length; michael@0: NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; michael@0: subfr = 0; michael@0: for( k = 0; k < psEncC->nb_subfr; k++ ) { michael@0: A_Q12 = &PredCoef_Q12[ ( ( k >> 1 ) | ( 1 - LSF_interpolation_flag ) ) * MAX_LPC_ORDER ]; michael@0: B_Q14 = <PCoef_Q14[ k * LTP_ORDER ]; michael@0: AR_shp_Q13 = &AR2_Q13[ k * MAX_SHAPE_LPC_ORDER ]; michael@0: michael@0: /* Noise shape parameters */ michael@0: silk_assert( HarmShapeGain_Q14[ k ] >= 0 ); michael@0: HarmShapeFIRPacked_Q14 = silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 ); michael@0: HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 ); michael@0: michael@0: NSQ->rewhite_flag = 0; michael@0: if( psIndices->signalType == TYPE_VOICED ) { michael@0: /* Voiced */ michael@0: lag = pitchL[ k ]; michael@0: michael@0: /* Re-whitening */ michael@0: if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) { michael@0: if( k == 2 ) { michael@0: /* RESET DELAYED DECISIONS */ michael@0: /* Find winner */ michael@0: RDmin_Q10 = psDelDec[ 0 ].RD_Q10; michael@0: Winner_ind = 0; michael@0: for( i = 1; i < psEncC->nStatesDelayedDecision; i++ ) { michael@0: if( psDelDec[ i ].RD_Q10 < RDmin_Q10 ) { michael@0: RDmin_Q10 = psDelDec[ i ].RD_Q10; michael@0: Winner_ind = i; michael@0: } michael@0: } michael@0: for( i = 0; i < psEncC->nStatesDelayedDecision; i++ ) { michael@0: if( i != Winner_ind ) { michael@0: psDelDec[ i ].RD_Q10 += ( silk_int32_MAX >> 4 ); michael@0: silk_assert( psDelDec[ i ].RD_Q10 >= 0 ); michael@0: } michael@0: } michael@0: michael@0: /* Copy final part of signals from winner state to output and long-term filter states */ michael@0: psDD = &psDelDec[ Winner_ind ]; michael@0: last_smple_idx = smpl_buf_idx + decisionDelay; michael@0: for( i = 0; i < decisionDelay; i++ ) { michael@0: last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK; michael@0: pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); michael@0: pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( michael@0: silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gains_Q16[ 1 ] ), 14 ) ); michael@0: NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; michael@0: } michael@0: michael@0: subfr = 0; michael@0: } michael@0: michael@0: /* Rewhiten with new A coefs */ michael@0: start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2; michael@0: silk_assert( start_idx > 0 ); michael@0: michael@0: silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ], michael@0: A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder ); michael@0: michael@0: NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; michael@0: NSQ->rewhite_flag = 1; michael@0: } michael@0: } michael@0: michael@0: silk_nsq_del_dec_scale_states( psEncC, NSQ, psDelDec, x_Q3, x_sc_Q10, sLTP, sLTP_Q15, k, michael@0: psEncC->nStatesDelayedDecision, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType, decisionDelay ); michael@0: michael@0: silk_noise_shape_quantizer_del_dec( NSQ, psDelDec, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, michael@0: delayedGain_Q10, A_Q12, B_Q14, AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], michael@0: Gains_Q16[ k ], Lambda_Q10, offset_Q10, psEncC->subfr_length, subfr++, psEncC->shapingLPCOrder, michael@0: psEncC->predictLPCOrder, psEncC->warping_Q16, psEncC->nStatesDelayedDecision, &smpl_buf_idx, decisionDelay ); michael@0: michael@0: x_Q3 += psEncC->subfr_length; michael@0: pulses += psEncC->subfr_length; michael@0: pxq += psEncC->subfr_length; michael@0: } michael@0: michael@0: /* Find winner */ michael@0: RDmin_Q10 = psDelDec[ 0 ].RD_Q10; michael@0: Winner_ind = 0; michael@0: for( k = 1; k < psEncC->nStatesDelayedDecision; k++ ) { michael@0: if( psDelDec[ k ].RD_Q10 < RDmin_Q10 ) { michael@0: RDmin_Q10 = psDelDec[ k ].RD_Q10; michael@0: Winner_ind = k; michael@0: } michael@0: } michael@0: michael@0: /* Copy final part of signals from winner state to output and long-term filter states */ michael@0: psDD = &psDelDec[ Winner_ind ]; michael@0: psIndices->Seed = psDD->SeedInit; michael@0: last_smple_idx = smpl_buf_idx + decisionDelay; michael@0: Gain_Q10 = silk_RSHIFT32( Gains_Q16[ psEncC->nb_subfr - 1 ], 6 ); michael@0: for( i = 0; i < decisionDelay; i++ ) { michael@0: last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK; michael@0: pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); michael@0: pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( michael@0: silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gain_Q10 ), 8 ) ); michael@0: NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; michael@0: } michael@0: silk_memcpy( NSQ->sLPC_Q14, &psDD->sLPC_Q14[ psEncC->subfr_length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); michael@0: silk_memcpy( NSQ->sAR2_Q14, psDD->sAR2_Q14, sizeof( psDD->sAR2_Q14 ) ); michael@0: michael@0: /* Update states */ michael@0: NSQ->sLF_AR_shp_Q14 = psDD->LF_AR_Q14; michael@0: NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ]; michael@0: michael@0: /* Save quantized speech signal */ michael@0: /* DEBUG_STORE_DATA( enc.pcm, &NSQ->xq[psEncC->ltp_mem_length], psEncC->frame_length * sizeof( opus_int16 ) ) */ michael@0: silk_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) ); michael@0: silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) ); michael@0: RESTORE_STACK; michael@0: } michael@0: michael@0: /******************************************/ michael@0: /* Noise shape quantizer for one subframe */ michael@0: /******************************************/ michael@0: static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( michael@0: silk_nsq_state *NSQ, /* I/O NSQ state */ michael@0: NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ michael@0: opus_int signalType, /* I Signal type */ michael@0: const opus_int32 x_Q10[], /* I */ michael@0: opus_int8 pulses[], /* O */ michael@0: opus_int16 xq[], /* O */ michael@0: opus_int32 sLTP_Q15[], /* I/O LTP filter state */ michael@0: opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ michael@0: const opus_int16 a_Q12[], /* I Short term prediction coefs */ michael@0: const opus_int16 b_Q14[], /* I Long term prediction coefs */ michael@0: const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ michael@0: opus_int lag, /* I Pitch lag */ michael@0: opus_int32 HarmShapeFIRPacked_Q14, /* I */ michael@0: opus_int Tilt_Q14, /* I Spectral tilt */ michael@0: opus_int32 LF_shp_Q14, /* I */ michael@0: opus_int32 Gain_Q16, /* I */ michael@0: opus_int Lambda_Q10, /* I */ michael@0: opus_int offset_Q10, /* I */ michael@0: opus_int length, /* I Input length */ michael@0: opus_int subfr, /* I Subframe number */ michael@0: opus_int shapingLPCOrder, /* I Shaping LPC filter order */ michael@0: opus_int predictLPCOrder, /* I Prediction filter order */ michael@0: opus_int warping_Q16, /* I */ michael@0: opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ michael@0: opus_int *smpl_buf_idx, /* I Index to newest samples in buffers */ michael@0: opus_int decisionDelay /* I */ michael@0: ) michael@0: { michael@0: opus_int i, j, k, Winner_ind, RDmin_ind, RDmax_ind, last_smple_idx; michael@0: opus_int32 Winner_rand_state; michael@0: opus_int32 LTP_pred_Q14, LPC_pred_Q14, n_AR_Q14, n_LTP_Q14; michael@0: opus_int32 n_LF_Q14, r_Q10, rr_Q10, rd1_Q10, rd2_Q10, RDmin_Q10, RDmax_Q10; michael@0: opus_int32 q1_Q0, q1_Q10, q2_Q10, exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10; michael@0: opus_int32 tmp1, tmp2, sLF_AR_shp_Q14; michael@0: opus_int32 *pred_lag_ptr, *shp_lag_ptr, *psLPC_Q14; michael@0: VARDECL( NSQ_sample_pair, psSampleState ); michael@0: NSQ_del_dec_struct *psDD; michael@0: NSQ_sample_struct *psSS; michael@0: SAVE_STACK; michael@0: michael@0: silk_assert( nStatesDelayedDecision > 0 ); michael@0: ALLOC( psSampleState, nStatesDelayedDecision, NSQ_sample_pair ); michael@0: michael@0: shp_lag_ptr = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ]; michael@0: pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ]; michael@0: Gain_Q10 = silk_RSHIFT( Gain_Q16, 6 ); michael@0: michael@0: for( i = 0; i < length; i++ ) { michael@0: /* Perform common calculations used in all states */ michael@0: michael@0: /* Long-term prediction */ michael@0: if( signalType == TYPE_VOICED ) { michael@0: /* Unrolled loop */ michael@0: /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ michael@0: LTP_pred_Q14 = 2; michael@0: LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ 0 ], b_Q14[ 0 ] ); michael@0: LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] ); michael@0: LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] ); michael@0: LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] ); michael@0: LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] ); michael@0: LTP_pred_Q14 = silk_LSHIFT( LTP_pred_Q14, 1 ); /* Q13 -> Q14 */ michael@0: pred_lag_ptr++; michael@0: } else { michael@0: LTP_pred_Q14 = 0; michael@0: } michael@0: michael@0: /* Long-term shaping */ michael@0: if( lag > 0 ) { michael@0: /* Symmetric, packed FIR coefficients */ michael@0: n_LTP_Q14 = silk_SMULWB( silk_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 ); michael@0: n_LTP_Q14 = silk_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 ); michael@0: n_LTP_Q14 = silk_SUB_LSHIFT32( LTP_pred_Q14, n_LTP_Q14, 2 ); /* Q12 -> Q14 */ michael@0: shp_lag_ptr++; michael@0: } else { michael@0: n_LTP_Q14 = 0; michael@0: } michael@0: michael@0: for( k = 0; k < nStatesDelayedDecision; k++ ) { michael@0: /* Delayed decision state */ michael@0: psDD = &psDelDec[ k ]; michael@0: michael@0: /* Sample state */ michael@0: psSS = psSampleState[ k ]; michael@0: michael@0: /* Generate dither */ michael@0: psDD->Seed = silk_RAND( psDD->Seed ); michael@0: michael@0: /* Pointer used in short term prediction and shaping */ michael@0: psLPC_Q14 = &psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 + i ]; michael@0: /* Short-term prediction */ michael@0: silk_assert( predictLPCOrder == 10 || predictLPCOrder == 16 ); michael@0: /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ michael@0: LPC_pred_Q14 = silk_RSHIFT( predictLPCOrder, 1 ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ 0 ], a_Q12[ 0 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -1 ], a_Q12[ 1 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -2 ], a_Q12[ 2 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -3 ], a_Q12[ 3 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -4 ], a_Q12[ 4 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -5 ], a_Q12[ 5 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -6 ], a_Q12[ 6 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -7 ], a_Q12[ 7 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -8 ], a_Q12[ 8 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -9 ], a_Q12[ 9 ] ); michael@0: if( predictLPCOrder == 16 ) { michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -10 ], a_Q12[ 10 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -11 ], a_Q12[ 11 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -12 ], a_Q12[ 12 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -13 ], a_Q12[ 13 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -14 ], a_Q12[ 14 ] ); michael@0: LPC_pred_Q14 = silk_SMLAWB( LPC_pred_Q14, psLPC_Q14[ -15 ], a_Q12[ 15 ] ); michael@0: } michael@0: LPC_pred_Q14 = silk_LSHIFT( LPC_pred_Q14, 4 ); /* Q10 -> Q14 */ michael@0: michael@0: /* Noise shape feedback */ michael@0: silk_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */ michael@0: /* Output of lowpass section */ michael@0: tmp2 = silk_SMLAWB( psLPC_Q14[ 0 ], psDD->sAR2_Q14[ 0 ], warping_Q16 ); michael@0: /* Output of allpass section */ michael@0: tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ 0 ], psDD->sAR2_Q14[ 1 ] - tmp2, warping_Q16 ); michael@0: psDD->sAR2_Q14[ 0 ] = tmp2; michael@0: n_AR_Q14 = silk_RSHIFT( shapingLPCOrder, 1 ); michael@0: n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ 0 ] ); michael@0: /* Loop over allpass sections */ michael@0: for( j = 2; j < shapingLPCOrder; j += 2 ) { michael@0: /* Output of allpass section */ michael@0: tmp2 = silk_SMLAWB( psDD->sAR2_Q14[ j - 1 ], psDD->sAR2_Q14[ j + 0 ] - tmp1, warping_Q16 ); michael@0: psDD->sAR2_Q14[ j - 1 ] = tmp1; michael@0: n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ j - 1 ] ); michael@0: /* Output of allpass section */ michael@0: tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ j + 0 ], psDD->sAR2_Q14[ j + 1 ] - tmp2, warping_Q16 ); michael@0: psDD->sAR2_Q14[ j + 0 ] = tmp2; michael@0: n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ j ] ); michael@0: } michael@0: psDD->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1; michael@0: n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] ); michael@0: michael@0: n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 1 ); /* Q11 -> Q12 */ michael@0: n_AR_Q14 = silk_SMLAWB( n_AR_Q14, psDD->LF_AR_Q14, Tilt_Q14 ); /* Q12 */ michael@0: n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 2 ); /* Q12 -> Q14 */ michael@0: michael@0: n_LF_Q14 = silk_SMULWB( psDD->Shape_Q14[ *smpl_buf_idx ], LF_shp_Q14 ); /* Q12 */ michael@0: n_LF_Q14 = silk_SMLAWT( n_LF_Q14, psDD->LF_AR_Q14, LF_shp_Q14 ); /* Q12 */ michael@0: n_LF_Q14 = silk_LSHIFT( n_LF_Q14, 2 ); /* Q12 -> Q14 */ michael@0: michael@0: /* Input minus prediction plus noise feedback */ michael@0: /* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP */ michael@0: tmp1 = silk_ADD32( n_AR_Q14, n_LF_Q14 ); /* Q14 */ michael@0: tmp2 = silk_ADD32( n_LTP_Q14, LPC_pred_Q14 ); /* Q13 */ michael@0: tmp1 = silk_SUB32( tmp2, tmp1 ); /* Q13 */ michael@0: tmp1 = silk_RSHIFT_ROUND( tmp1, 4 ); /* Q10 */ michael@0: michael@0: r_Q10 = silk_SUB32( x_Q10[ i ], tmp1 ); /* residual error Q10 */ michael@0: michael@0: /* Flip sign depending on dither */ michael@0: if ( psDD->Seed < 0 ) { michael@0: r_Q10 = -r_Q10; michael@0: } michael@0: r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 ); michael@0: michael@0: /* Find two quantization level candidates and measure their rate-distortion */ michael@0: q1_Q10 = silk_SUB32( r_Q10, offset_Q10 ); michael@0: q1_Q0 = silk_RSHIFT( q1_Q10, 10 ); michael@0: if( q1_Q0 > 0 ) { michael@0: q1_Q10 = silk_SUB32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); michael@0: q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); michael@0: q2_Q10 = silk_ADD32( q1_Q10, 1024 ); michael@0: rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); michael@0: rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); michael@0: } else if( q1_Q0 == 0 ) { michael@0: q1_Q10 = offset_Q10; michael@0: q2_Q10 = silk_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); michael@0: rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); michael@0: rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); michael@0: } else if( q1_Q0 == -1 ) { michael@0: q2_Q10 = offset_Q10; michael@0: q1_Q10 = silk_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); michael@0: rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); michael@0: rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); michael@0: } else { /* q1_Q0 < -1 */ michael@0: q1_Q10 = silk_ADD32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); michael@0: q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); michael@0: q2_Q10 = silk_ADD32( q1_Q10, 1024 ); michael@0: rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); michael@0: rd2_Q10 = silk_SMULBB( -q2_Q10, Lambda_Q10 ); michael@0: } michael@0: rr_Q10 = silk_SUB32( r_Q10, q1_Q10 ); michael@0: rd1_Q10 = silk_RSHIFT( silk_SMLABB( rd1_Q10, rr_Q10, rr_Q10 ), 10 ); michael@0: rr_Q10 = silk_SUB32( r_Q10, q2_Q10 ); michael@0: rd2_Q10 = silk_RSHIFT( silk_SMLABB( rd2_Q10, rr_Q10, rr_Q10 ), 10 ); michael@0: michael@0: if( rd1_Q10 < rd2_Q10 ) { michael@0: psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); michael@0: psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); michael@0: psSS[ 0 ].Q_Q10 = q1_Q10; michael@0: psSS[ 1 ].Q_Q10 = q2_Q10; michael@0: } else { michael@0: psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); michael@0: psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); michael@0: psSS[ 0 ].Q_Q10 = q2_Q10; michael@0: psSS[ 1 ].Q_Q10 = q1_Q10; michael@0: } michael@0: michael@0: /* Update states for best quantization */ michael@0: michael@0: /* Quantized excitation */ michael@0: exc_Q14 = silk_LSHIFT32( psSS[ 0 ].Q_Q10, 4 ); michael@0: if ( psDD->Seed < 0 ) { michael@0: exc_Q14 = -exc_Q14; michael@0: } michael@0: michael@0: /* Add predictions */ michael@0: LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); michael@0: xq_Q14 = silk_ADD32( LPC_exc_Q14, LPC_pred_Q14 ); michael@0: michael@0: /* Update states */ michael@0: sLF_AR_shp_Q14 = silk_SUB32( xq_Q14, n_AR_Q14 ); michael@0: psSS[ 0 ].sLTP_shp_Q14 = silk_SUB32( sLF_AR_shp_Q14, n_LF_Q14 ); michael@0: psSS[ 0 ].LF_AR_Q14 = sLF_AR_shp_Q14; michael@0: psSS[ 0 ].LPC_exc_Q14 = LPC_exc_Q14; michael@0: psSS[ 0 ].xq_Q14 = xq_Q14; michael@0: michael@0: /* Update states for second best quantization */ michael@0: michael@0: /* Quantized excitation */ michael@0: exc_Q14 = silk_LSHIFT32( psSS[ 1 ].Q_Q10, 4 ); michael@0: if ( psDD->Seed < 0 ) { michael@0: exc_Q14 = -exc_Q14; michael@0: } michael@0: michael@0: michael@0: /* Add predictions */ michael@0: LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); michael@0: xq_Q14 = silk_ADD32( LPC_exc_Q14, LPC_pred_Q14 ); michael@0: michael@0: /* Update states */ michael@0: sLF_AR_shp_Q14 = silk_SUB32( xq_Q14, n_AR_Q14 ); michael@0: psSS[ 1 ].sLTP_shp_Q14 = silk_SUB32( sLF_AR_shp_Q14, n_LF_Q14 ); michael@0: psSS[ 1 ].LF_AR_Q14 = sLF_AR_shp_Q14; michael@0: psSS[ 1 ].LPC_exc_Q14 = LPC_exc_Q14; michael@0: psSS[ 1 ].xq_Q14 = xq_Q14; michael@0: } michael@0: michael@0: *smpl_buf_idx = ( *smpl_buf_idx - 1 ) & DECISION_DELAY_MASK; /* Index to newest samples */ michael@0: last_smple_idx = ( *smpl_buf_idx + decisionDelay ) & DECISION_DELAY_MASK; /* Index to decisionDelay old samples */ michael@0: michael@0: /* Find winner */ michael@0: RDmin_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; michael@0: Winner_ind = 0; michael@0: for( k = 1; k < nStatesDelayedDecision; k++ ) { michael@0: if( psSampleState[ k ][ 0 ].RD_Q10 < RDmin_Q10 ) { michael@0: RDmin_Q10 = psSampleState[ k ][ 0 ].RD_Q10; michael@0: Winner_ind = k; michael@0: } michael@0: } michael@0: michael@0: /* Increase RD values of expired states */ michael@0: Winner_rand_state = psDelDec[ Winner_ind ].RandState[ last_smple_idx ]; michael@0: for( k = 0; k < nStatesDelayedDecision; k++ ) { michael@0: if( psDelDec[ k ].RandState[ last_smple_idx ] != Winner_rand_state ) { michael@0: psSampleState[ k ][ 0 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 0 ].RD_Q10, silk_int32_MAX >> 4 ); michael@0: psSampleState[ k ][ 1 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 1 ].RD_Q10, silk_int32_MAX >> 4 ); michael@0: silk_assert( psSampleState[ k ][ 0 ].RD_Q10 >= 0 ); michael@0: } michael@0: } michael@0: michael@0: /* Find worst in first set and best in second set */ michael@0: RDmax_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; michael@0: RDmin_Q10 = psSampleState[ 0 ][ 1 ].RD_Q10; michael@0: RDmax_ind = 0; michael@0: RDmin_ind = 0; michael@0: for( k = 1; k < nStatesDelayedDecision; k++ ) { michael@0: /* find worst in first set */ michael@0: if( psSampleState[ k ][ 0 ].RD_Q10 > RDmax_Q10 ) { michael@0: RDmax_Q10 = psSampleState[ k ][ 0 ].RD_Q10; michael@0: RDmax_ind = k; michael@0: } michael@0: /* find best in second set */ michael@0: if( psSampleState[ k ][ 1 ].RD_Q10 < RDmin_Q10 ) { michael@0: RDmin_Q10 = psSampleState[ k ][ 1 ].RD_Q10; michael@0: RDmin_ind = k; michael@0: } michael@0: } michael@0: michael@0: /* Replace a state if best from second set outperforms worst in first set */ michael@0: if( RDmin_Q10 < RDmax_Q10 ) { michael@0: silk_memcpy( ( (opus_int32 *)&psDelDec[ RDmax_ind ] ) + i, michael@0: ( (opus_int32 *)&psDelDec[ RDmin_ind ] ) + i, sizeof( NSQ_del_dec_struct ) - i * sizeof( opus_int32) ); michael@0: silk_memcpy( &psSampleState[ RDmax_ind ][ 0 ], &psSampleState[ RDmin_ind ][ 1 ], sizeof( NSQ_sample_struct ) ); michael@0: } michael@0: michael@0: /* Write samples from winner to output and long-term filter states */ michael@0: psDD = &psDelDec[ Winner_ind ]; michael@0: if( subfr > 0 || i >= decisionDelay ) { michael@0: pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); michael@0: xq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( michael@0: silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], delayedGain_Q10[ last_smple_idx ] ), 8 ) ); michael@0: NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay ] = psDD->Shape_Q14[ last_smple_idx ]; michael@0: sLTP_Q15[ NSQ->sLTP_buf_idx - decisionDelay ] = psDD->Pred_Q15[ last_smple_idx ]; michael@0: } michael@0: NSQ->sLTP_shp_buf_idx++; michael@0: NSQ->sLTP_buf_idx++; michael@0: michael@0: /* Update states */ michael@0: for( k = 0; k < nStatesDelayedDecision; k++ ) { michael@0: psDD = &psDelDec[ k ]; michael@0: psSS = &psSampleState[ k ][ 0 ]; michael@0: psDD->LF_AR_Q14 = psSS->LF_AR_Q14; michael@0: psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH + i ] = psSS->xq_Q14; michael@0: psDD->Xq_Q14[ *smpl_buf_idx ] = psSS->xq_Q14; michael@0: psDD->Q_Q10[ *smpl_buf_idx ] = psSS->Q_Q10; michael@0: psDD->Pred_Q15[ *smpl_buf_idx ] = silk_LSHIFT32( psSS->LPC_exc_Q14, 1 ); michael@0: psDD->Shape_Q14[ *smpl_buf_idx ] = psSS->sLTP_shp_Q14; michael@0: psDD->Seed = silk_ADD32_ovflw( psDD->Seed, silk_RSHIFT_ROUND( psSS->Q_Q10, 10 ) ); michael@0: psDD->RandState[ *smpl_buf_idx ] = psDD->Seed; michael@0: psDD->RD_Q10 = psSS->RD_Q10; michael@0: } michael@0: delayedGain_Q10[ *smpl_buf_idx ] = Gain_Q10; michael@0: } michael@0: /* Update LPC states */ michael@0: for( k = 0; k < nStatesDelayedDecision; k++ ) { michael@0: psDD = &psDelDec[ k ]; michael@0: silk_memcpy( psDD->sLPC_Q14, &psDD->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); michael@0: } michael@0: RESTORE_STACK; michael@0: } michael@0: michael@0: static OPUS_INLINE void silk_nsq_del_dec_scale_states( michael@0: const silk_encoder_state *psEncC, /* I Encoder State */ michael@0: silk_nsq_state *NSQ, /* I/O NSQ state */ michael@0: NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ michael@0: const opus_int32 x_Q3[], /* I Input in Q3 */ michael@0: opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ michael@0: const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ michael@0: opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ michael@0: opus_int subfr, /* I Subframe number */ michael@0: opus_int nStatesDelayedDecision, /* I Number of del dec states */ michael@0: const opus_int LTP_scale_Q14, /* I LTP state scaling */ michael@0: const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ michael@0: const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ michael@0: const opus_int signal_type, /* I Signal type */ michael@0: const opus_int decisionDelay /* I Decision delay */ michael@0: ) michael@0: { michael@0: opus_int i, k, lag; michael@0: opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q23; michael@0: NSQ_del_dec_struct *psDD; michael@0: michael@0: lag = pitchL[ subfr ]; michael@0: inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 ); michael@0: silk_assert( inv_gain_Q31 != 0 ); michael@0: michael@0: /* Calculate gain adjustment factor */ michael@0: if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) { michael@0: gain_adj_Q16 = silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 ); michael@0: } else { michael@0: gain_adj_Q16 = (opus_int32)1 << 16; michael@0: } michael@0: michael@0: /* Scale input */ michael@0: inv_gain_Q23 = silk_RSHIFT_ROUND( inv_gain_Q31, 8 ); michael@0: for( i = 0; i < psEncC->subfr_length; i++ ) { michael@0: x_sc_Q10[ i ] = silk_SMULWW( x_Q3[ i ], inv_gain_Q23 ); michael@0: } michael@0: michael@0: /* Save inverse gain */ michael@0: NSQ->prev_gain_Q16 = Gains_Q16[ subfr ]; michael@0: michael@0: /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */ michael@0: if( NSQ->rewhite_flag ) { michael@0: if( subfr == 0 ) { michael@0: /* Do LTP downscaling */ michael@0: inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 ); michael@0: } michael@0: for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) { michael@0: silk_assert( i < MAX_FRAME_LENGTH ); michael@0: sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] ); michael@0: } michael@0: } michael@0: michael@0: /* Adjust for changing gain */ michael@0: if( gain_adj_Q16 != (opus_int32)1 << 16 ) { michael@0: /* Scale long-term shaping state */ michael@0: for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) { michael@0: NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] ); michael@0: } michael@0: michael@0: /* Scale long-term prediction state */ michael@0: if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) { michael@0: for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx - decisionDelay; i++ ) { michael@0: sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] ); michael@0: } michael@0: } michael@0: michael@0: for( k = 0; k < nStatesDelayedDecision; k++ ) { michael@0: psDD = &psDelDec[ k ]; michael@0: michael@0: /* Scale scalar states */ michael@0: psDD->LF_AR_Q14 = silk_SMULWW( gain_adj_Q16, psDD->LF_AR_Q14 ); michael@0: michael@0: /* Scale short-term prediction and shaping states */ michael@0: for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) { michael@0: psDD->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sLPC_Q14[ i ] ); michael@0: } michael@0: for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) { michael@0: psDD->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sAR2_Q14[ i ] ); michael@0: } michael@0: for( i = 0; i < DECISION_DELAY; i++ ) { michael@0: psDD->Pred_Q15[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Pred_Q15[ i ] ); michael@0: psDD->Shape_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Shape_Q14[ i ] ); michael@0: } michael@0: } michael@0: } michael@0: }