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730 lines
39 KiB
730 lines
39 KiB
/*********************************************************************** |
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Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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- Neither the name of Internet Society, IETF or IETF Trust, nor the |
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names of specific contributors, may be used to endorse or promote |
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products derived from this software without specific prior written |
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permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE. |
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***********************************************************************/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include "main.h" |
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#include "stack_alloc.h" |
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#include "NSQ.h" |
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typedef struct { |
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opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ]; |
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opus_int32 RandState[ DECISION_DELAY ]; |
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opus_int32 Q_Q10[ DECISION_DELAY ]; |
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opus_int32 Xq_Q14[ DECISION_DELAY ]; |
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opus_int32 Pred_Q15[ DECISION_DELAY ]; |
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opus_int32 Shape_Q14[ DECISION_DELAY ]; |
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opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ]; |
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opus_int32 LF_AR_Q14; |
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opus_int32 Diff_Q14; |
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opus_int32 Seed; |
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opus_int32 SeedInit; |
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opus_int32 RD_Q10; |
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} NSQ_del_dec_struct; |
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typedef struct { |
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opus_int32 Q_Q10; |
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opus_int32 RD_Q10; |
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opus_int32 xq_Q14; |
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opus_int32 LF_AR_Q14; |
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opus_int32 Diff_Q14; |
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opus_int32 sLTP_shp_Q14; |
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opus_int32 LPC_exc_Q14; |
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} NSQ_sample_struct; |
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typedef NSQ_sample_struct NSQ_sample_pair[ 2 ]; |
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|
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static OPUS_INLINE void silk_nsq_del_dec_scale_states( |
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const silk_encoder_state *psEncC, /* I Encoder State */ |
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silk_nsq_state *NSQ, /* I/O NSQ state */ |
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NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
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const opus_int16 x16[], /* I Input */ |
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opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ |
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const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ |
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opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
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opus_int subfr, /* I Subframe number */ |
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opus_int nStatesDelayedDecision, /* I Number of del dec states */ |
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const opus_int LTP_scale_Q14, /* I LTP state scaling */ |
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const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
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const opus_int signal_type, /* I Signal type */ |
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const opus_int decisionDelay /* I Decision delay */ |
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); |
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/******************************************/ |
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/* Noise shape quantizer for one subframe */ |
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/******************************************/ |
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static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( |
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silk_nsq_state *NSQ, /* I/O NSQ state */ |
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NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
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opus_int signalType, /* I Signal type */ |
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const opus_int32 x_Q10[], /* I */ |
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opus_int8 pulses[], /* O */ |
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opus_int16 xq[], /* O */ |
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opus_int32 sLTP_Q15[], /* I/O LTP filter state */ |
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opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ |
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const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
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const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
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const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ |
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opus_int lag, /* I Pitch lag */ |
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opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
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opus_int Tilt_Q14, /* I Spectral tilt */ |
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opus_int32 LF_shp_Q14, /* I */ |
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opus_int32 Gain_Q16, /* I */ |
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opus_int Lambda_Q10, /* I */ |
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opus_int offset_Q10, /* I */ |
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opus_int length, /* I Input length */ |
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opus_int subfr, /* I Subframe number */ |
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opus_int shapingLPCOrder, /* I Shaping LPC filter order */ |
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opus_int predictLPCOrder, /* I Prediction filter order */ |
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opus_int warping_Q16, /* I */ |
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opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ |
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opus_int *smpl_buf_idx, /* I/O Index to newest samples in buffers */ |
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opus_int decisionDelay, /* I */ |
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int arch /* I */ |
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); |
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void silk_NSQ_del_dec_c( |
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const silk_encoder_state *psEncC, /* I Encoder State */ |
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silk_nsq_state *NSQ, /* I/O NSQ state */ |
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SideInfoIndices *psIndices, /* I/O Quantization Indices */ |
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const opus_int16 x16[], /* I Input */ |
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opus_int8 pulses[], /* O Quantized pulse signal */ |
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const opus_int16 *PredCoef_Q12, /* I Short term prediction coefs */ |
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const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ |
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const opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ |
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const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ |
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const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ |
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const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ |
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const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ |
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
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const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ |
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const opus_int LTP_scale_Q14 /* I LTP state scaling */ |
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) |
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{ |
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opus_int i, k, lag, start_idx, LSF_interpolation_flag, Winner_ind, subfr; |
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opus_int last_smple_idx, smpl_buf_idx, decisionDelay; |
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const opus_int16 *A_Q12, *B_Q14, *AR_shp_Q13; |
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opus_int16 *pxq; |
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VARDECL( opus_int32, sLTP_Q15 ); |
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VARDECL( opus_int16, sLTP ); |
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opus_int32 HarmShapeFIRPacked_Q14; |
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opus_int offset_Q10; |
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opus_int32 RDmin_Q10, Gain_Q10; |
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VARDECL( opus_int32, x_sc_Q10 ); |
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VARDECL( opus_int32, delayedGain_Q10 ); |
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VARDECL( NSQ_del_dec_struct, psDelDec ); |
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NSQ_del_dec_struct *psDD; |
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SAVE_STACK; |
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/* Set unvoiced lag to the previous one, overwrite later for voiced */ |
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lag = NSQ->lagPrev; |
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silk_assert( NSQ->prev_gain_Q16 != 0 ); |
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/* Initialize delayed decision states */ |
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ALLOC( psDelDec, psEncC->nStatesDelayedDecision, NSQ_del_dec_struct ); |
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silk_memset( psDelDec, 0, psEncC->nStatesDelayedDecision * sizeof( NSQ_del_dec_struct ) ); |
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for( k = 0; k < psEncC->nStatesDelayedDecision; k++ ) { |
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psDD = &psDelDec[ k ]; |
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psDD->Seed = ( k + psIndices->Seed ) & 3; |
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psDD->SeedInit = psDD->Seed; |
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psDD->RD_Q10 = 0; |
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psDD->LF_AR_Q14 = NSQ->sLF_AR_shp_Q14; |
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psDD->Diff_Q14 = NSQ->sDiff_shp_Q14; |
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psDD->Shape_Q14[ 0 ] = NSQ->sLTP_shp_Q14[ psEncC->ltp_mem_length - 1 ]; |
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silk_memcpy( psDD->sLPC_Q14, NSQ->sLPC_Q14, NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
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silk_memcpy( psDD->sAR2_Q14, NSQ->sAR2_Q14, sizeof( NSQ->sAR2_Q14 ) ); |
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} |
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offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ]; |
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smpl_buf_idx = 0; /* index of oldest samples */ |
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decisionDelay = silk_min_int( DECISION_DELAY, psEncC->subfr_length ); |
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/* For voiced frames limit the decision delay to lower than the pitch lag */ |
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if( psIndices->signalType == TYPE_VOICED ) { |
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for( k = 0; k < psEncC->nb_subfr; k++ ) { |
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decisionDelay = silk_min_int( decisionDelay, pitchL[ k ] - LTP_ORDER / 2 - 1 ); |
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} |
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} else { |
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if( lag > 0 ) { |
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decisionDelay = silk_min_int( decisionDelay, lag - LTP_ORDER / 2 - 1 ); |
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} |
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} |
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if( psIndices->NLSFInterpCoef_Q2 == 4 ) { |
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LSF_interpolation_flag = 0; |
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} else { |
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LSF_interpolation_flag = 1; |
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} |
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ALLOC( sLTP_Q15, psEncC->ltp_mem_length + psEncC->frame_length, opus_int32 ); |
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ALLOC( sLTP, psEncC->ltp_mem_length + psEncC->frame_length, opus_int16 ); |
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ALLOC( x_sc_Q10, psEncC->subfr_length, opus_int32 ); |
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ALLOC( delayedGain_Q10, DECISION_DELAY, opus_int32 ); |
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/* Set up pointers to start of sub frame */ |
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pxq = &NSQ->xq[ psEncC->ltp_mem_length ]; |
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NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length; |
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NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
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subfr = 0; |
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for( k = 0; k < psEncC->nb_subfr; k++ ) { |
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A_Q12 = &PredCoef_Q12[ ( ( k >> 1 ) | ( 1 - LSF_interpolation_flag ) ) * MAX_LPC_ORDER ]; |
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B_Q14 = <PCoef_Q14[ k * LTP_ORDER ]; |
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AR_shp_Q13 = &AR_Q13[ k * MAX_SHAPE_LPC_ORDER ]; |
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/* Noise shape parameters */ |
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silk_assert( HarmShapeGain_Q14[ k ] >= 0 ); |
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HarmShapeFIRPacked_Q14 = silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 ); |
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HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 ); |
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NSQ->rewhite_flag = 0; |
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if( psIndices->signalType == TYPE_VOICED ) { |
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/* Voiced */ |
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lag = pitchL[ k ]; |
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/* Re-whitening */ |
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if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) { |
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if( k == 2 ) { |
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/* RESET DELAYED DECISIONS */ |
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/* Find winner */ |
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RDmin_Q10 = psDelDec[ 0 ].RD_Q10; |
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Winner_ind = 0; |
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for( i = 1; i < psEncC->nStatesDelayedDecision; i++ ) { |
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if( psDelDec[ i ].RD_Q10 < RDmin_Q10 ) { |
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RDmin_Q10 = psDelDec[ i ].RD_Q10; |
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Winner_ind = i; |
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} |
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} |
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for( i = 0; i < psEncC->nStatesDelayedDecision; i++ ) { |
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if( i != Winner_ind ) { |
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psDelDec[ i ].RD_Q10 += ( silk_int32_MAX >> 4 ); |
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silk_assert( psDelDec[ i ].RD_Q10 >= 0 ); |
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} |
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} |
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/* Copy final part of signals from winner state to output and long-term filter states */ |
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psDD = &psDelDec[ Winner_ind ]; |
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last_smple_idx = smpl_buf_idx + decisionDelay; |
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for( i = 0; i < decisionDelay; i++ ) { |
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last_smple_idx = ( last_smple_idx - 1 ) % DECISION_DELAY; |
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if( last_smple_idx < 0 ) last_smple_idx += DECISION_DELAY; |
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pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
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pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
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silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gains_Q16[ 1 ] ), 14 ) ); |
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NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; |
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} |
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subfr = 0; |
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} |
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/* Rewhiten with new A coefs */ |
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start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2; |
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celt_assert( start_idx > 0 ); |
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silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ], |
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A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder, psEncC->arch ); |
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NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
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NSQ->rewhite_flag = 1; |
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} |
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} |
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silk_nsq_del_dec_scale_states( psEncC, NSQ, psDelDec, x16, x_sc_Q10, sLTP, sLTP_Q15, k, |
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psEncC->nStatesDelayedDecision, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType, decisionDelay ); |
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silk_noise_shape_quantizer_del_dec( NSQ, psDelDec, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, |
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delayedGain_Q10, A_Q12, B_Q14, AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], |
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Gains_Q16[ k ], Lambda_Q10, offset_Q10, psEncC->subfr_length, subfr++, psEncC->shapingLPCOrder, |
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psEncC->predictLPCOrder, psEncC->warping_Q16, psEncC->nStatesDelayedDecision, &smpl_buf_idx, decisionDelay, psEncC->arch ); |
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x16 += psEncC->subfr_length; |
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pulses += psEncC->subfr_length; |
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pxq += psEncC->subfr_length; |
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} |
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/* Find winner */ |
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RDmin_Q10 = psDelDec[ 0 ].RD_Q10; |
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Winner_ind = 0; |
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for( k = 1; k < psEncC->nStatesDelayedDecision; k++ ) { |
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if( psDelDec[ k ].RD_Q10 < RDmin_Q10 ) { |
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RDmin_Q10 = psDelDec[ k ].RD_Q10; |
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Winner_ind = k; |
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} |
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} |
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/* Copy final part of signals from winner state to output and long-term filter states */ |
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psDD = &psDelDec[ Winner_ind ]; |
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psIndices->Seed = psDD->SeedInit; |
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last_smple_idx = smpl_buf_idx + decisionDelay; |
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Gain_Q10 = silk_RSHIFT32( Gains_Q16[ psEncC->nb_subfr - 1 ], 6 ); |
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for( i = 0; i < decisionDelay; i++ ) { |
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last_smple_idx = ( last_smple_idx - 1 ) % DECISION_DELAY; |
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if( last_smple_idx < 0 ) last_smple_idx += DECISION_DELAY; |
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pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
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pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
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silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gain_Q10 ), 8 ) ); |
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NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; |
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} |
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silk_memcpy( NSQ->sLPC_Q14, &psDD->sLPC_Q14[ psEncC->subfr_length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
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silk_memcpy( NSQ->sAR2_Q14, psDD->sAR2_Q14, sizeof( psDD->sAR2_Q14 ) ); |
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/* Update states */ |
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NSQ->sLF_AR_shp_Q14 = psDD->LF_AR_Q14; |
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NSQ->sDiff_shp_Q14 = psDD->Diff_Q14; |
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NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ]; |
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/* Save quantized speech signal */ |
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silk_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) ); |
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silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) ); |
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RESTORE_STACK; |
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} |
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/******************************************/ |
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/* Noise shape quantizer for one subframe */ |
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/******************************************/ |
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#ifndef OVERRIDE_silk_noise_shape_quantizer_del_dec |
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static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( |
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silk_nsq_state *NSQ, /* I/O NSQ state */ |
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NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
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opus_int signalType, /* I Signal type */ |
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const opus_int32 x_Q10[], /* I */ |
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opus_int8 pulses[], /* O */ |
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opus_int16 xq[], /* O */ |
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opus_int32 sLTP_Q15[], /* I/O LTP filter state */ |
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opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ |
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const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
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const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
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const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ |
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opus_int lag, /* I Pitch lag */ |
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opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
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opus_int Tilt_Q14, /* I Spectral tilt */ |
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opus_int32 LF_shp_Q14, /* I */ |
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opus_int32 Gain_Q16, /* I */ |
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opus_int Lambda_Q10, /* I */ |
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opus_int offset_Q10, /* I */ |
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opus_int length, /* I Input length */ |
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opus_int subfr, /* I Subframe number */ |
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opus_int shapingLPCOrder, /* I Shaping LPC filter order */ |
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opus_int predictLPCOrder, /* I Prediction filter order */ |
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opus_int warping_Q16, /* I */ |
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opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ |
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opus_int *smpl_buf_idx, /* I/O Index to newest samples in buffers */ |
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opus_int decisionDelay, /* I */ |
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int arch /* I */ |
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) |
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{ |
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opus_int i, j, k, Winner_ind, RDmin_ind, RDmax_ind, last_smple_idx; |
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opus_int32 Winner_rand_state; |
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opus_int32 LTP_pred_Q14, LPC_pred_Q14, n_AR_Q14, n_LTP_Q14; |
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opus_int32 n_LF_Q14, r_Q10, rr_Q10, rd1_Q10, rd2_Q10, RDmin_Q10, RDmax_Q10; |
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opus_int32 q1_Q0, q1_Q10, q2_Q10, exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10; |
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opus_int32 tmp1, tmp2, sLF_AR_shp_Q14; |
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opus_int32 *pred_lag_ptr, *shp_lag_ptr, *psLPC_Q14; |
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#ifdef silk_short_prediction_create_arch_coef |
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opus_int32 a_Q12_arch[MAX_LPC_ORDER]; |
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#endif |
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|
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VARDECL( NSQ_sample_pair, psSampleState ); |
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NSQ_del_dec_struct *psDD; |
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NSQ_sample_struct *psSS; |
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SAVE_STACK; |
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celt_assert( nStatesDelayedDecision > 0 ); |
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ALLOC( psSampleState, nStatesDelayedDecision, NSQ_sample_pair ); |
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shp_lag_ptr = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ]; |
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pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ]; |
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Gain_Q10 = silk_RSHIFT( Gain_Q16, 6 ); |
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|
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#ifdef silk_short_prediction_create_arch_coef |
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silk_short_prediction_create_arch_coef(a_Q12_arch, a_Q12, predictLPCOrder); |
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#endif |
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|
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for( i = 0; i < length; i++ ) { |
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/* Perform common calculations used in all states */ |
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|
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/* Long-term prediction */ |
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if( signalType == TYPE_VOICED ) { |
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/* Unrolled loop */ |
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/* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ |
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LTP_pred_Q14 = 2; |
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LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ 0 ], b_Q14[ 0 ] ); |
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LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] ); |
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LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] ); |
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LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] ); |
|
LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] ); |
|
LTP_pred_Q14 = silk_LSHIFT( LTP_pred_Q14, 1 ); /* Q13 -> Q14 */ |
|
pred_lag_ptr++; |
|
} else { |
|
LTP_pred_Q14 = 0; |
|
} |
|
|
|
/* Long-term shaping */ |
|
if( lag > 0 ) { |
|
/* Symmetric, packed FIR coefficients */ |
|
n_LTP_Q14 = silk_SMULWB( silk_ADD_SAT32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 ); |
|
n_LTP_Q14 = silk_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 ); |
|
n_LTP_Q14 = silk_SUB_LSHIFT32( LTP_pred_Q14, n_LTP_Q14, 2 ); /* Q12 -> Q14 */ |
|
shp_lag_ptr++; |
|
} else { |
|
n_LTP_Q14 = 0; |
|
} |
|
|
|
for( k = 0; k < nStatesDelayedDecision; k++ ) { |
|
/* Delayed decision state */ |
|
psDD = &psDelDec[ k ]; |
|
|
|
/* Sample state */ |
|
psSS = psSampleState[ k ]; |
|
|
|
/* Generate dither */ |
|
psDD->Seed = silk_RAND( psDD->Seed ); |
|
|
|
/* Pointer used in short term prediction and shaping */ |
|
psLPC_Q14 = &psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 + i ]; |
|
/* Short-term prediction */ |
|
LPC_pred_Q14 = silk_noise_shape_quantizer_short_prediction(psLPC_Q14, a_Q12, a_Q12_arch, predictLPCOrder, arch); |
|
LPC_pred_Q14 = silk_LSHIFT( LPC_pred_Q14, 4 ); /* Q10 -> Q14 */ |
|
|
|
/* Noise shape feedback */ |
|
celt_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */ |
|
/* Output of lowpass section */ |
|
tmp2 = silk_SMLAWB( psDD->Diff_Q14, psDD->sAR2_Q14[ 0 ], warping_Q16 ); |
|
/* Output of allpass section */ |
|
tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ 0 ], silk_SUB32_ovflw(psDD->sAR2_Q14[ 1 ], tmp2), warping_Q16 ); |
|
psDD->sAR2_Q14[ 0 ] = tmp2; |
|
n_AR_Q14 = silk_RSHIFT( shapingLPCOrder, 1 ); |
|
n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ 0 ] ); |
|
/* Loop over allpass sections */ |
|
for( j = 2; j < shapingLPCOrder; j += 2 ) { |
|
/* Output of allpass section */ |
|
tmp2 = silk_SMLAWB( psDD->sAR2_Q14[ j - 1 ], silk_SUB32_ovflw(psDD->sAR2_Q14[ j + 0 ], tmp1), warping_Q16 ); |
|
psDD->sAR2_Q14[ j - 1 ] = tmp1; |
|
n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ j - 1 ] ); |
|
/* Output of allpass section */ |
|
tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ j + 0 ], silk_SUB32_ovflw(psDD->sAR2_Q14[ j + 1 ], tmp2), warping_Q16 ); |
|
psDD->sAR2_Q14[ j + 0 ] = tmp2; |
|
n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ j ] ); |
|
} |
|
psDD->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1; |
|
n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] ); |
|
|
|
n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 1 ); /* Q11 -> Q12 */ |
|
n_AR_Q14 = silk_SMLAWB( n_AR_Q14, psDD->LF_AR_Q14, Tilt_Q14 ); /* Q12 */ |
|
n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 2 ); /* Q12 -> Q14 */ |
|
|
|
n_LF_Q14 = silk_SMULWB( psDD->Shape_Q14[ *smpl_buf_idx ], LF_shp_Q14 ); /* Q12 */ |
|
n_LF_Q14 = silk_SMLAWT( n_LF_Q14, psDD->LF_AR_Q14, LF_shp_Q14 ); /* Q12 */ |
|
n_LF_Q14 = silk_LSHIFT( n_LF_Q14, 2 ); /* Q12 -> Q14 */ |
|
|
|
/* Input minus prediction plus noise feedback */ |
|
/* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP */ |
|
tmp1 = silk_ADD_SAT32( n_AR_Q14, n_LF_Q14 ); /* Q14 */ |
|
tmp2 = silk_ADD32_ovflw( n_LTP_Q14, LPC_pred_Q14 ); /* Q13 */ |
|
tmp1 = silk_SUB_SAT32( tmp2, tmp1 ); /* Q13 */ |
|
tmp1 = silk_RSHIFT_ROUND( tmp1, 4 ); /* Q10 */ |
|
|
|
r_Q10 = silk_SUB32( x_Q10[ i ], tmp1 ); /* residual error Q10 */ |
|
|
|
/* Flip sign depending on dither */ |
|
if ( psDD->Seed < 0 ) { |
|
r_Q10 = -r_Q10; |
|
} |
|
r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 ); |
|
|
|
/* Find two quantization level candidates and measure their rate-distortion */ |
|
q1_Q10 = silk_SUB32( r_Q10, offset_Q10 ); |
|
q1_Q0 = silk_RSHIFT( q1_Q10, 10 ); |
|
if (Lambda_Q10 > 2048) { |
|
/* For aggressive RDO, the bias becomes more than one pulse. */ |
|
int rdo_offset = Lambda_Q10/2 - 512; |
|
if (q1_Q10 > rdo_offset) { |
|
q1_Q0 = silk_RSHIFT( q1_Q10 - rdo_offset, 10 ); |
|
} else if (q1_Q10 < -rdo_offset) { |
|
q1_Q0 = silk_RSHIFT( q1_Q10 + rdo_offset, 10 ); |
|
} else if (q1_Q10 < 0) { |
|
q1_Q0 = -1; |
|
} else { |
|
q1_Q0 = 0; |
|
} |
|
} |
|
if( q1_Q0 > 0 ) { |
|
q1_Q10 = silk_SUB32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
|
q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
|
q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
|
rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
|
rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
|
} else if( q1_Q0 == 0 ) { |
|
q1_Q10 = offset_Q10; |
|
q2_Q10 = silk_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
|
rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
|
rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
|
} else if( q1_Q0 == -1 ) { |
|
q2_Q10 = offset_Q10; |
|
q1_Q10 = silk_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
|
rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
|
rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
|
} else { /* q1_Q0 < -1 */ |
|
q1_Q10 = silk_ADD32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
|
q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
|
q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
|
rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
|
rd2_Q10 = silk_SMULBB( -q2_Q10, Lambda_Q10 ); |
|
} |
|
rr_Q10 = silk_SUB32( r_Q10, q1_Q10 ); |
|
rd1_Q10 = silk_RSHIFT( silk_SMLABB( rd1_Q10, rr_Q10, rr_Q10 ), 10 ); |
|
rr_Q10 = silk_SUB32( r_Q10, q2_Q10 ); |
|
rd2_Q10 = silk_RSHIFT( silk_SMLABB( rd2_Q10, rr_Q10, rr_Q10 ), 10 ); |
|
|
|
if( rd1_Q10 < rd2_Q10 ) { |
|
psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); |
|
psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); |
|
psSS[ 0 ].Q_Q10 = q1_Q10; |
|
psSS[ 1 ].Q_Q10 = q2_Q10; |
|
} else { |
|
psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); |
|
psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); |
|
psSS[ 0 ].Q_Q10 = q2_Q10; |
|
psSS[ 1 ].Q_Q10 = q1_Q10; |
|
} |
|
|
|
/* Update states for best quantization */ |
|
|
|
/* Quantized excitation */ |
|
exc_Q14 = silk_LSHIFT32( psSS[ 0 ].Q_Q10, 4 ); |
|
if ( psDD->Seed < 0 ) { |
|
exc_Q14 = -exc_Q14; |
|
} |
|
|
|
/* Add predictions */ |
|
LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); |
|
xq_Q14 = silk_ADD32_ovflw( LPC_exc_Q14, LPC_pred_Q14 ); |
|
|
|
/* Update states */ |
|
psSS[ 0 ].Diff_Q14 = silk_SUB32_ovflw( xq_Q14, silk_LSHIFT32( x_Q10[ i ], 4 ) ); |
|
sLF_AR_shp_Q14 = silk_SUB32_ovflw( psSS[ 0 ].Diff_Q14, n_AR_Q14 ); |
|
psSS[ 0 ].sLTP_shp_Q14 = silk_SUB_SAT32( sLF_AR_shp_Q14, n_LF_Q14 ); |
|
psSS[ 0 ].LF_AR_Q14 = sLF_AR_shp_Q14; |
|
psSS[ 0 ].LPC_exc_Q14 = LPC_exc_Q14; |
|
psSS[ 0 ].xq_Q14 = xq_Q14; |
|
|
|
/* Update states for second best quantization */ |
|
|
|
/* Quantized excitation */ |
|
exc_Q14 = silk_LSHIFT32( psSS[ 1 ].Q_Q10, 4 ); |
|
if ( psDD->Seed < 0 ) { |
|
exc_Q14 = -exc_Q14; |
|
} |
|
|
|
/* Add predictions */ |
|
LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); |
|
xq_Q14 = silk_ADD32_ovflw( LPC_exc_Q14, LPC_pred_Q14 ); |
|
|
|
/* Update states */ |
|
psSS[ 1 ].Diff_Q14 = silk_SUB32_ovflw( xq_Q14, silk_LSHIFT32( x_Q10[ i ], 4 ) ); |
|
sLF_AR_shp_Q14 = silk_SUB32_ovflw( psSS[ 1 ].Diff_Q14, n_AR_Q14 ); |
|
psSS[ 1 ].sLTP_shp_Q14 = silk_SUB_SAT32( sLF_AR_shp_Q14, n_LF_Q14 ); |
|
psSS[ 1 ].LF_AR_Q14 = sLF_AR_shp_Q14; |
|
psSS[ 1 ].LPC_exc_Q14 = LPC_exc_Q14; |
|
psSS[ 1 ].xq_Q14 = xq_Q14; |
|
} |
|
|
|
*smpl_buf_idx = ( *smpl_buf_idx - 1 ) % DECISION_DELAY; |
|
if( *smpl_buf_idx < 0 ) *smpl_buf_idx += DECISION_DELAY; |
|
last_smple_idx = ( *smpl_buf_idx + decisionDelay ) % DECISION_DELAY; |
|
|
|
/* Find winner */ |
|
RDmin_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; |
|
Winner_ind = 0; |
|
for( k = 1; k < nStatesDelayedDecision; k++ ) { |
|
if( psSampleState[ k ][ 0 ].RD_Q10 < RDmin_Q10 ) { |
|
RDmin_Q10 = psSampleState[ k ][ 0 ].RD_Q10; |
|
Winner_ind = k; |
|
} |
|
} |
|
|
|
/* Increase RD values of expired states */ |
|
Winner_rand_state = psDelDec[ Winner_ind ].RandState[ last_smple_idx ]; |
|
for( k = 0; k < nStatesDelayedDecision; k++ ) { |
|
if( psDelDec[ k ].RandState[ last_smple_idx ] != Winner_rand_state ) { |
|
psSampleState[ k ][ 0 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 0 ].RD_Q10, silk_int32_MAX >> 4 ); |
|
psSampleState[ k ][ 1 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 1 ].RD_Q10, silk_int32_MAX >> 4 ); |
|
silk_assert( psSampleState[ k ][ 0 ].RD_Q10 >= 0 ); |
|
} |
|
} |
|
|
|
/* Find worst in first set and best in second set */ |
|
RDmax_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; |
|
RDmin_Q10 = psSampleState[ 0 ][ 1 ].RD_Q10; |
|
RDmax_ind = 0; |
|
RDmin_ind = 0; |
|
for( k = 1; k < nStatesDelayedDecision; k++ ) { |
|
/* find worst in first set */ |
|
if( psSampleState[ k ][ 0 ].RD_Q10 > RDmax_Q10 ) { |
|
RDmax_Q10 = psSampleState[ k ][ 0 ].RD_Q10; |
|
RDmax_ind = k; |
|
} |
|
/* find best in second set */ |
|
if( psSampleState[ k ][ 1 ].RD_Q10 < RDmin_Q10 ) { |
|
RDmin_Q10 = psSampleState[ k ][ 1 ].RD_Q10; |
|
RDmin_ind = k; |
|
} |
|
} |
|
|
|
/* Replace a state if best from second set outperforms worst in first set */ |
|
if( RDmin_Q10 < RDmax_Q10 ) { |
|
silk_memcpy( ( (opus_int32 *)&psDelDec[ RDmax_ind ] ) + i, |
|
( (opus_int32 *)&psDelDec[ RDmin_ind ] ) + i, sizeof( NSQ_del_dec_struct ) - i * sizeof( opus_int32) ); |
|
silk_memcpy( &psSampleState[ RDmax_ind ][ 0 ], &psSampleState[ RDmin_ind ][ 1 ], sizeof( NSQ_sample_struct ) ); |
|
} |
|
|
|
/* Write samples from winner to output and long-term filter states */ |
|
psDD = &psDelDec[ Winner_ind ]; |
|
if( subfr > 0 || i >= decisionDelay ) { |
|
pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
|
xq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
|
silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], delayedGain_Q10[ last_smple_idx ] ), 8 ) ); |
|
NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay ] = psDD->Shape_Q14[ last_smple_idx ]; |
|
sLTP_Q15[ NSQ->sLTP_buf_idx - decisionDelay ] = psDD->Pred_Q15[ last_smple_idx ]; |
|
} |
|
NSQ->sLTP_shp_buf_idx++; |
|
NSQ->sLTP_buf_idx++; |
|
|
|
/* Update states */ |
|
for( k = 0; k < nStatesDelayedDecision; k++ ) { |
|
psDD = &psDelDec[ k ]; |
|
psSS = &psSampleState[ k ][ 0 ]; |
|
psDD->LF_AR_Q14 = psSS->LF_AR_Q14; |
|
psDD->Diff_Q14 = psSS->Diff_Q14; |
|
psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH + i ] = psSS->xq_Q14; |
|
psDD->Xq_Q14[ *smpl_buf_idx ] = psSS->xq_Q14; |
|
psDD->Q_Q10[ *smpl_buf_idx ] = psSS->Q_Q10; |
|
psDD->Pred_Q15[ *smpl_buf_idx ] = silk_LSHIFT32( psSS->LPC_exc_Q14, 1 ); |
|
psDD->Shape_Q14[ *smpl_buf_idx ] = psSS->sLTP_shp_Q14; |
|
psDD->Seed = silk_ADD32_ovflw( psDD->Seed, silk_RSHIFT_ROUND( psSS->Q_Q10, 10 ) ); |
|
psDD->RandState[ *smpl_buf_idx ] = psDD->Seed; |
|
psDD->RD_Q10 = psSS->RD_Q10; |
|
} |
|
delayedGain_Q10[ *smpl_buf_idx ] = Gain_Q10; |
|
} |
|
/* Update LPC states */ |
|
for( k = 0; k < nStatesDelayedDecision; k++ ) { |
|
psDD = &psDelDec[ k ]; |
|
silk_memcpy( psDD->sLPC_Q14, &psDD->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
|
} |
|
RESTORE_STACK; |
|
} |
|
#endif /* OVERRIDE_silk_noise_shape_quantizer_del_dec */ |
|
|
|
static OPUS_INLINE void silk_nsq_del_dec_scale_states( |
|
const silk_encoder_state *psEncC, /* I Encoder State */ |
|
silk_nsq_state *NSQ, /* I/O NSQ state */ |
|
NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
|
const opus_int16 x16[], /* I Input */ |
|
opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ |
|
const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ |
|
opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
|
opus_int subfr, /* I Subframe number */ |
|
opus_int nStatesDelayedDecision, /* I Number of del dec states */ |
|
const opus_int LTP_scale_Q14, /* I LTP state scaling */ |
|
const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
|
const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
|
const opus_int signal_type, /* I Signal type */ |
|
const opus_int decisionDelay /* I Decision delay */ |
|
) |
|
{ |
|
opus_int i, k, lag; |
|
opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q26; |
|
NSQ_del_dec_struct *psDD; |
|
|
|
lag = pitchL[ subfr ]; |
|
inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 ); |
|
silk_assert( inv_gain_Q31 != 0 ); |
|
|
|
/* Scale input */ |
|
inv_gain_Q26 = silk_RSHIFT_ROUND( inv_gain_Q31, 5 ); |
|
for( i = 0; i < psEncC->subfr_length; i++ ) { |
|
x_sc_Q10[ i ] = silk_SMULWW( x16[ i ], inv_gain_Q26 ); |
|
} |
|
|
|
/* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */ |
|
if( NSQ->rewhite_flag ) { |
|
if( subfr == 0 ) { |
|
/* Do LTP downscaling */ |
|
inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 ); |
|
} |
|
for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) { |
|
silk_assert( i < MAX_FRAME_LENGTH ); |
|
sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] ); |
|
} |
|
} |
|
|
|
/* Adjust for changing gain */ |
|
if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) { |
|
gain_adj_Q16 = silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 ); |
|
|
|
/* Scale long-term shaping state */ |
|
for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) { |
|
NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] ); |
|
} |
|
|
|
/* Scale long-term prediction state */ |
|
if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) { |
|
for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx - decisionDelay; i++ ) { |
|
sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] ); |
|
} |
|
} |
|
|
|
for( k = 0; k < nStatesDelayedDecision; k++ ) { |
|
psDD = &psDelDec[ k ]; |
|
|
|
/* Scale scalar states */ |
|
psDD->LF_AR_Q14 = silk_SMULWW( gain_adj_Q16, psDD->LF_AR_Q14 ); |
|
psDD->Diff_Q14 = silk_SMULWW( gain_adj_Q16, psDD->Diff_Q14 ); |
|
|
|
/* Scale short-term prediction and shaping states */ |
|
for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) { |
|
psDD->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sLPC_Q14[ i ] ); |
|
} |
|
for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) { |
|
psDD->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sAR2_Q14[ i ] ); |
|
} |
|
for( i = 0; i < DECISION_DELAY; i++ ) { |
|
psDD->Pred_Q15[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Pred_Q15[ i ] ); |
|
psDD->Shape_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Shape_Q14[ i ] ); |
|
} |
|
} |
|
|
|
/* Save inverse gain */ |
|
NSQ->prev_gain_Q16 = Gains_Q16[ subfr ]; |
|
} |
|
}
|
|
|