Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
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| 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "main.h" |
| 33 | #include "stack_alloc.h" |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 34 | #include "NSQ.h" |
| 35 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 36 | |
| 37 | typedef struct { |
| 38 | opus_int32 sLPC_Q14[ MAX_SUB_FRAME_LENGTH + NSQ_LPC_BUF_LENGTH ]; |
| 39 | opus_int32 RandState[ DECISION_DELAY ]; |
| 40 | opus_int32 Q_Q10[ DECISION_DELAY ]; |
| 41 | opus_int32 Xq_Q14[ DECISION_DELAY ]; |
| 42 | opus_int32 Pred_Q15[ DECISION_DELAY ]; |
| 43 | opus_int32 Shape_Q14[ DECISION_DELAY ]; |
| 44 | opus_int32 sAR2_Q14[ MAX_SHAPE_LPC_ORDER ]; |
| 45 | opus_int32 LF_AR_Q14; |
| 46 | opus_int32 Seed; |
| 47 | opus_int32 SeedInit; |
| 48 | opus_int32 RD_Q10; |
| 49 | } NSQ_del_dec_struct; |
| 50 | |
| 51 | typedef struct { |
| 52 | opus_int32 Q_Q10; |
| 53 | opus_int32 RD_Q10; |
| 54 | opus_int32 xq_Q14; |
| 55 | opus_int32 LF_AR_Q14; |
| 56 | opus_int32 sLTP_shp_Q14; |
| 57 | opus_int32 LPC_exc_Q14; |
| 58 | } NSQ_sample_struct; |
| 59 | |
| 60 | typedef NSQ_sample_struct NSQ_sample_pair[ 2 ]; |
| 61 | |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 62 | #if defined(MIPSr1_ASM) |
| 63 | #include "mips/NSQ_del_dec_mipsr1.h" |
| 64 | #endif |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 65 | static OPUS_INLINE void silk_nsq_del_dec_scale_states( |
| 66 | const silk_encoder_state *psEncC, /* I Encoder State */ |
| 67 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 68 | NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
| 69 | const opus_int32 x_Q3[], /* I Input in Q3 */ |
| 70 | opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ |
| 71 | const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ |
| 72 | opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
| 73 | opus_int subfr, /* I Subframe number */ |
| 74 | opus_int nStatesDelayedDecision, /* I Number of del dec states */ |
| 75 | const opus_int LTP_scale_Q14, /* I LTP state scaling */ |
| 76 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
| 77 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
| 78 | const opus_int signal_type, /* I Signal type */ |
| 79 | const opus_int decisionDelay /* I Decision delay */ |
| 80 | ); |
| 81 | |
| 82 | /******************************************/ |
| 83 | /* Noise shape quantizer for one subframe */ |
| 84 | /******************************************/ |
| 85 | static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( |
| 86 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 87 | NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
| 88 | opus_int signalType, /* I Signal type */ |
| 89 | const opus_int32 x_Q10[], /* I */ |
| 90 | opus_int8 pulses[], /* O */ |
| 91 | opus_int16 xq[], /* O */ |
| 92 | opus_int32 sLTP_Q15[], /* I/O LTP filter state */ |
| 93 | opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ |
| 94 | const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
| 95 | const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
| 96 | const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ |
| 97 | opus_int lag, /* I Pitch lag */ |
| 98 | opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
| 99 | opus_int Tilt_Q14, /* I Spectral tilt */ |
| 100 | opus_int32 LF_shp_Q14, /* I */ |
| 101 | opus_int32 Gain_Q16, /* I */ |
| 102 | opus_int Lambda_Q10, /* I */ |
| 103 | opus_int offset_Q10, /* I */ |
| 104 | opus_int length, /* I Input length */ |
| 105 | opus_int subfr, /* I Subframe number */ |
| 106 | opus_int shapingLPCOrder, /* I Shaping LPC filter order */ |
| 107 | opus_int predictLPCOrder, /* I Prediction filter order */ |
| 108 | opus_int warping_Q16, /* I */ |
| 109 | opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ |
| 110 | opus_int *smpl_buf_idx, /* I Index to newest samples in buffers */ |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 111 | opus_int decisionDelay, /* I */ |
| 112 | int arch /* I */ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 113 | ); |
| 114 | |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 115 | void silk_NSQ_del_dec_c( |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 116 | const silk_encoder_state *psEncC, /* I/O Encoder State */ |
| 117 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 118 | SideInfoIndices *psIndices, /* I/O Quantization Indices */ |
| 119 | const opus_int32 x_Q3[], /* I Prefiltered input signal */ |
| 120 | opus_int8 pulses[], /* O Quantized pulse signal */ |
| 121 | const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ |
| 122 | const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ |
| 123 | const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ |
| 124 | const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ |
| 125 | const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ |
| 126 | const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ |
| 127 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ |
| 128 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
| 129 | const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ |
| 130 | const opus_int LTP_scale_Q14 /* I LTP state scaling */ |
| 131 | ) |
| 132 | { |
| 133 | opus_int i, k, lag, start_idx, LSF_interpolation_flag, Winner_ind, subfr; |
| 134 | opus_int last_smple_idx, smpl_buf_idx, decisionDelay; |
| 135 | const opus_int16 *A_Q12, *B_Q14, *AR_shp_Q13; |
| 136 | opus_int16 *pxq; |
| 137 | VARDECL( opus_int32, sLTP_Q15 ); |
| 138 | VARDECL( opus_int16, sLTP ); |
| 139 | opus_int32 HarmShapeFIRPacked_Q14; |
| 140 | opus_int offset_Q10; |
| 141 | opus_int32 RDmin_Q10, Gain_Q10; |
| 142 | VARDECL( opus_int32, x_sc_Q10 ); |
| 143 | VARDECL( opus_int32, delayedGain_Q10 ); |
| 144 | VARDECL( NSQ_del_dec_struct, psDelDec ); |
| 145 | NSQ_del_dec_struct *psDD; |
| 146 | SAVE_STACK; |
| 147 | |
| 148 | /* Set unvoiced lag to the previous one, overwrite later for voiced */ |
| 149 | lag = NSQ->lagPrev; |
| 150 | |
| 151 | silk_assert( NSQ->prev_gain_Q16 != 0 ); |
| 152 | |
| 153 | /* Initialize delayed decision states */ |
| 154 | ALLOC( psDelDec, psEncC->nStatesDelayedDecision, NSQ_del_dec_struct ); |
| 155 | silk_memset( psDelDec, 0, psEncC->nStatesDelayedDecision * sizeof( NSQ_del_dec_struct ) ); |
| 156 | for( k = 0; k < psEncC->nStatesDelayedDecision; k++ ) { |
| 157 | psDD = &psDelDec[ k ]; |
| 158 | psDD->Seed = ( k + psIndices->Seed ) & 3; |
| 159 | psDD->SeedInit = psDD->Seed; |
| 160 | psDD->RD_Q10 = 0; |
| 161 | psDD->LF_AR_Q14 = NSQ->sLF_AR_shp_Q14; |
| 162 | psDD->Shape_Q14[ 0 ] = NSQ->sLTP_shp_Q14[ psEncC->ltp_mem_length - 1 ]; |
| 163 | silk_memcpy( psDD->sLPC_Q14, NSQ->sLPC_Q14, NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
| 164 | silk_memcpy( psDD->sAR2_Q14, NSQ->sAR2_Q14, sizeof( NSQ->sAR2_Q14 ) ); |
| 165 | } |
| 166 | |
| 167 | offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ]; |
| 168 | smpl_buf_idx = 0; /* index of oldest samples */ |
| 169 | |
| 170 | decisionDelay = silk_min_int( DECISION_DELAY, psEncC->subfr_length ); |
| 171 | |
| 172 | /* For voiced frames limit the decision delay to lower than the pitch lag */ |
| 173 | if( psIndices->signalType == TYPE_VOICED ) { |
| 174 | for( k = 0; k < psEncC->nb_subfr; k++ ) { |
| 175 | decisionDelay = silk_min_int( decisionDelay, pitchL[ k ] - LTP_ORDER / 2 - 1 ); |
| 176 | } |
| 177 | } else { |
| 178 | if( lag > 0 ) { |
| 179 | decisionDelay = silk_min_int( decisionDelay, lag - LTP_ORDER / 2 - 1 ); |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | if( psIndices->NLSFInterpCoef_Q2 == 4 ) { |
| 184 | LSF_interpolation_flag = 0; |
| 185 | } else { |
| 186 | LSF_interpolation_flag = 1; |
| 187 | } |
| 188 | |
| 189 | ALLOC( sLTP_Q15, |
| 190 | psEncC->ltp_mem_length + psEncC->frame_length, opus_int32 ); |
| 191 | ALLOC( sLTP, psEncC->ltp_mem_length + psEncC->frame_length, opus_int16 ); |
| 192 | ALLOC( x_sc_Q10, psEncC->subfr_length, opus_int32 ); |
| 193 | ALLOC( delayedGain_Q10, DECISION_DELAY, opus_int32 ); |
| 194 | /* Set up pointers to start of sub frame */ |
| 195 | pxq = &NSQ->xq[ psEncC->ltp_mem_length ]; |
| 196 | NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length; |
| 197 | NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
| 198 | subfr = 0; |
| 199 | for( k = 0; k < psEncC->nb_subfr; k++ ) { |
| 200 | A_Q12 = &PredCoef_Q12[ ( ( k >> 1 ) | ( 1 - LSF_interpolation_flag ) ) * MAX_LPC_ORDER ]; |
| 201 | B_Q14 = <PCoef_Q14[ k * LTP_ORDER ]; |
| 202 | AR_shp_Q13 = &AR2_Q13[ k * MAX_SHAPE_LPC_ORDER ]; |
| 203 | |
| 204 | /* Noise shape parameters */ |
| 205 | silk_assert( HarmShapeGain_Q14[ k ] >= 0 ); |
| 206 | HarmShapeFIRPacked_Q14 = silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 ); |
| 207 | HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 ); |
| 208 | |
| 209 | NSQ->rewhite_flag = 0; |
| 210 | if( psIndices->signalType == TYPE_VOICED ) { |
| 211 | /* Voiced */ |
| 212 | lag = pitchL[ k ]; |
| 213 | |
| 214 | /* Re-whitening */ |
| 215 | if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) { |
| 216 | if( k == 2 ) { |
| 217 | /* RESET DELAYED DECISIONS */ |
| 218 | /* Find winner */ |
| 219 | RDmin_Q10 = psDelDec[ 0 ].RD_Q10; |
| 220 | Winner_ind = 0; |
| 221 | for( i = 1; i < psEncC->nStatesDelayedDecision; i++ ) { |
| 222 | if( psDelDec[ i ].RD_Q10 < RDmin_Q10 ) { |
| 223 | RDmin_Q10 = psDelDec[ i ].RD_Q10; |
| 224 | Winner_ind = i; |
| 225 | } |
| 226 | } |
| 227 | for( i = 0; i < psEncC->nStatesDelayedDecision; i++ ) { |
| 228 | if( i != Winner_ind ) { |
| 229 | psDelDec[ i ].RD_Q10 += ( silk_int32_MAX >> 4 ); |
| 230 | silk_assert( psDelDec[ i ].RD_Q10 >= 0 ); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | /* Copy final part of signals from winner state to output and long-term filter states */ |
| 235 | psDD = &psDelDec[ Winner_ind ]; |
| 236 | last_smple_idx = smpl_buf_idx + decisionDelay; |
| 237 | for( i = 0; i < decisionDelay; i++ ) { |
| 238 | last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK; |
| 239 | pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
| 240 | pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
| 241 | silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gains_Q16[ 1 ] ), 14 ) ); |
| 242 | NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; |
| 243 | } |
| 244 | |
| 245 | subfr = 0; |
| 246 | } |
| 247 | |
| 248 | /* Rewhiten with new A coefs */ |
| 249 | start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2; |
| 250 | silk_assert( start_idx > 0 ); |
| 251 | |
| 252 | silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ], |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 253 | A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder, psEncC->arch ); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 254 | |
| 255 | NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
| 256 | NSQ->rewhite_flag = 1; |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | silk_nsq_del_dec_scale_states( psEncC, NSQ, psDelDec, x_Q3, x_sc_Q10, sLTP, sLTP_Q15, k, |
| 261 | psEncC->nStatesDelayedDecision, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType, decisionDelay ); |
| 262 | |
| 263 | silk_noise_shape_quantizer_del_dec( NSQ, psDelDec, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, |
| 264 | delayedGain_Q10, A_Q12, B_Q14, AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], |
| 265 | Gains_Q16[ k ], Lambda_Q10, offset_Q10, psEncC->subfr_length, subfr++, psEncC->shapingLPCOrder, |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 266 | psEncC->predictLPCOrder, psEncC->warping_Q16, psEncC->nStatesDelayedDecision, &smpl_buf_idx, decisionDelay, psEncC->arch ); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 267 | |
| 268 | x_Q3 += psEncC->subfr_length; |
| 269 | pulses += psEncC->subfr_length; |
| 270 | pxq += psEncC->subfr_length; |
| 271 | } |
| 272 | |
| 273 | /* Find winner */ |
| 274 | RDmin_Q10 = psDelDec[ 0 ].RD_Q10; |
| 275 | Winner_ind = 0; |
| 276 | for( k = 1; k < psEncC->nStatesDelayedDecision; k++ ) { |
| 277 | if( psDelDec[ k ].RD_Q10 < RDmin_Q10 ) { |
| 278 | RDmin_Q10 = psDelDec[ k ].RD_Q10; |
| 279 | Winner_ind = k; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | /* Copy final part of signals from winner state to output and long-term filter states */ |
| 284 | psDD = &psDelDec[ Winner_ind ]; |
| 285 | psIndices->Seed = psDD->SeedInit; |
| 286 | last_smple_idx = smpl_buf_idx + decisionDelay; |
| 287 | Gain_Q10 = silk_RSHIFT32( Gains_Q16[ psEncC->nb_subfr - 1 ], 6 ); |
| 288 | for( i = 0; i < decisionDelay; i++ ) { |
| 289 | last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK; |
| 290 | pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
| 291 | pxq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
| 292 | silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], Gain_Q10 ), 8 ) ); |
| 293 | NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q14[ last_smple_idx ]; |
| 294 | } |
| 295 | silk_memcpy( NSQ->sLPC_Q14, &psDD->sLPC_Q14[ psEncC->subfr_length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
| 296 | silk_memcpy( NSQ->sAR2_Q14, psDD->sAR2_Q14, sizeof( psDD->sAR2_Q14 ) ); |
| 297 | |
| 298 | /* Update states */ |
| 299 | NSQ->sLF_AR_shp_Q14 = psDD->LF_AR_Q14; |
| 300 | NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ]; |
| 301 | |
| 302 | /* Save quantized speech signal */ |
| 303 | /* DEBUG_STORE_DATA( enc.pcm, &NSQ->xq[psEncC->ltp_mem_length], psEncC->frame_length * sizeof( opus_int16 ) ) */ |
| 304 | silk_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) ); |
| 305 | silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) ); |
| 306 | RESTORE_STACK; |
| 307 | } |
| 308 | |
| 309 | /******************************************/ |
| 310 | /* Noise shape quantizer for one subframe */ |
| 311 | /******************************************/ |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 312 | #ifndef OVERRIDE_silk_noise_shape_quantizer_del_dec |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 313 | static OPUS_INLINE void silk_noise_shape_quantizer_del_dec( |
| 314 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 315 | NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
| 316 | opus_int signalType, /* I Signal type */ |
| 317 | const opus_int32 x_Q10[], /* I */ |
| 318 | opus_int8 pulses[], /* O */ |
| 319 | opus_int16 xq[], /* O */ |
| 320 | opus_int32 sLTP_Q15[], /* I/O LTP filter state */ |
| 321 | opus_int32 delayedGain_Q10[], /* I/O Gain delay buffer */ |
| 322 | const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
| 323 | const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
| 324 | const opus_int16 AR_shp_Q13[], /* I Noise shaping coefs */ |
| 325 | opus_int lag, /* I Pitch lag */ |
| 326 | opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
| 327 | opus_int Tilt_Q14, /* I Spectral tilt */ |
| 328 | opus_int32 LF_shp_Q14, /* I */ |
| 329 | opus_int32 Gain_Q16, /* I */ |
| 330 | opus_int Lambda_Q10, /* I */ |
| 331 | opus_int offset_Q10, /* I */ |
| 332 | opus_int length, /* I Input length */ |
| 333 | opus_int subfr, /* I Subframe number */ |
| 334 | opus_int shapingLPCOrder, /* I Shaping LPC filter order */ |
| 335 | opus_int predictLPCOrder, /* I Prediction filter order */ |
| 336 | opus_int warping_Q16, /* I */ |
| 337 | opus_int nStatesDelayedDecision, /* I Number of states in decision tree */ |
| 338 | opus_int *smpl_buf_idx, /* I Index to newest samples in buffers */ |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 339 | opus_int decisionDelay, /* I */ |
| 340 | int arch /* I */ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 341 | ) |
| 342 | { |
| 343 | opus_int i, j, k, Winner_ind, RDmin_ind, RDmax_ind, last_smple_idx; |
| 344 | opus_int32 Winner_rand_state; |
| 345 | opus_int32 LTP_pred_Q14, LPC_pred_Q14, n_AR_Q14, n_LTP_Q14; |
| 346 | opus_int32 n_LF_Q14, r_Q10, rr_Q10, rd1_Q10, rd2_Q10, RDmin_Q10, RDmax_Q10; |
| 347 | opus_int32 q1_Q0, q1_Q10, q2_Q10, exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10; |
| 348 | opus_int32 tmp1, tmp2, sLF_AR_shp_Q14; |
| 349 | opus_int32 *pred_lag_ptr, *shp_lag_ptr, *psLPC_Q14; |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 350 | #ifdef silk_short_prediction_create_arch_coef |
| 351 | opus_int32 a_Q12_arch[MAX_LPC_ORDER]; |
| 352 | #endif |
| 353 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 354 | VARDECL( NSQ_sample_pair, psSampleState ); |
| 355 | NSQ_del_dec_struct *psDD; |
| 356 | NSQ_sample_struct *psSS; |
| 357 | SAVE_STACK; |
| 358 | |
| 359 | silk_assert( nStatesDelayedDecision > 0 ); |
| 360 | ALLOC( psSampleState, nStatesDelayedDecision, NSQ_sample_pair ); |
| 361 | |
| 362 | shp_lag_ptr = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ]; |
| 363 | pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ]; |
| 364 | Gain_Q10 = silk_RSHIFT( Gain_Q16, 6 ); |
| 365 | |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 366 | #ifdef silk_short_prediction_create_arch_coef |
| 367 | silk_short_prediction_create_arch_coef(a_Q12_arch, a_Q12, predictLPCOrder); |
| 368 | #endif |
| 369 | |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 370 | for( i = 0; i < length; i++ ) { |
| 371 | /* Perform common calculations used in all states */ |
| 372 | |
| 373 | /* Long-term prediction */ |
| 374 | if( signalType == TYPE_VOICED ) { |
| 375 | /* Unrolled loop */ |
| 376 | /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ |
| 377 | LTP_pred_Q14 = 2; |
| 378 | LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ 0 ], b_Q14[ 0 ] ); |
| 379 | LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] ); |
| 380 | LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] ); |
| 381 | LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] ); |
| 382 | LTP_pred_Q14 = silk_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] ); |
| 383 | LTP_pred_Q14 = silk_LSHIFT( LTP_pred_Q14, 1 ); /* Q13 -> Q14 */ |
| 384 | pred_lag_ptr++; |
| 385 | } else { |
| 386 | LTP_pred_Q14 = 0; |
| 387 | } |
| 388 | |
| 389 | /* Long-term shaping */ |
| 390 | if( lag > 0 ) { |
| 391 | /* Symmetric, packed FIR coefficients */ |
| 392 | n_LTP_Q14 = silk_SMULWB( silk_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 ); |
| 393 | n_LTP_Q14 = silk_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 ); |
| 394 | n_LTP_Q14 = silk_SUB_LSHIFT32( LTP_pred_Q14, n_LTP_Q14, 2 ); /* Q12 -> Q14 */ |
| 395 | shp_lag_ptr++; |
| 396 | } else { |
| 397 | n_LTP_Q14 = 0; |
| 398 | } |
| 399 | |
| 400 | for( k = 0; k < nStatesDelayedDecision; k++ ) { |
| 401 | /* Delayed decision state */ |
| 402 | psDD = &psDelDec[ k ]; |
| 403 | |
| 404 | /* Sample state */ |
| 405 | psSS = psSampleState[ k ]; |
| 406 | |
| 407 | /* Generate dither */ |
| 408 | psDD->Seed = silk_RAND( psDD->Seed ); |
| 409 | |
| 410 | /* Pointer used in short term prediction and shaping */ |
| 411 | psLPC_Q14 = &psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 + i ]; |
| 412 | /* Short-term prediction */ |
Felicia Lim | d03c373 | 2016-07-25 20:28:37 +0200 | [diff] [blame] | 413 | LPC_pred_Q14 = silk_noise_shape_quantizer_short_prediction(psLPC_Q14, a_Q12, a_Q12_arch, predictLPCOrder, arch); |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 414 | LPC_pred_Q14 = silk_LSHIFT( LPC_pred_Q14, 4 ); /* Q10 -> Q14 */ |
| 415 | |
| 416 | /* Noise shape feedback */ |
| 417 | silk_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */ |
| 418 | /* Output of lowpass section */ |
| 419 | tmp2 = silk_SMLAWB( psLPC_Q14[ 0 ], psDD->sAR2_Q14[ 0 ], warping_Q16 ); |
| 420 | /* Output of allpass section */ |
| 421 | tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ 0 ], psDD->sAR2_Q14[ 1 ] - tmp2, warping_Q16 ); |
| 422 | psDD->sAR2_Q14[ 0 ] = tmp2; |
| 423 | n_AR_Q14 = silk_RSHIFT( shapingLPCOrder, 1 ); |
| 424 | n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ 0 ] ); |
| 425 | /* Loop over allpass sections */ |
| 426 | for( j = 2; j < shapingLPCOrder; j += 2 ) { |
| 427 | /* Output of allpass section */ |
| 428 | tmp2 = silk_SMLAWB( psDD->sAR2_Q14[ j - 1 ], psDD->sAR2_Q14[ j + 0 ] - tmp1, warping_Q16 ); |
| 429 | psDD->sAR2_Q14[ j - 1 ] = tmp1; |
| 430 | n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ j - 1 ] ); |
| 431 | /* Output of allpass section */ |
| 432 | tmp1 = silk_SMLAWB( psDD->sAR2_Q14[ j + 0 ], psDD->sAR2_Q14[ j + 1 ] - tmp2, warping_Q16 ); |
| 433 | psDD->sAR2_Q14[ j + 0 ] = tmp2; |
| 434 | n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp2, AR_shp_Q13[ j ] ); |
| 435 | } |
| 436 | psDD->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1; |
| 437 | n_AR_Q14 = silk_SMLAWB( n_AR_Q14, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] ); |
| 438 | |
| 439 | n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 1 ); /* Q11 -> Q12 */ |
| 440 | n_AR_Q14 = silk_SMLAWB( n_AR_Q14, psDD->LF_AR_Q14, Tilt_Q14 ); /* Q12 */ |
| 441 | n_AR_Q14 = silk_LSHIFT( n_AR_Q14, 2 ); /* Q12 -> Q14 */ |
| 442 | |
| 443 | n_LF_Q14 = silk_SMULWB( psDD->Shape_Q14[ *smpl_buf_idx ], LF_shp_Q14 ); /* Q12 */ |
| 444 | n_LF_Q14 = silk_SMLAWT( n_LF_Q14, psDD->LF_AR_Q14, LF_shp_Q14 ); /* Q12 */ |
| 445 | n_LF_Q14 = silk_LSHIFT( n_LF_Q14, 2 ); /* Q12 -> Q14 */ |
| 446 | |
| 447 | /* Input minus prediction plus noise feedback */ |
| 448 | /* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP */ |
| 449 | tmp1 = silk_ADD32( n_AR_Q14, n_LF_Q14 ); /* Q14 */ |
| 450 | tmp2 = silk_ADD32( n_LTP_Q14, LPC_pred_Q14 ); /* Q13 */ |
| 451 | tmp1 = silk_SUB32( tmp2, tmp1 ); /* Q13 */ |
| 452 | tmp1 = silk_RSHIFT_ROUND( tmp1, 4 ); /* Q10 */ |
| 453 | |
| 454 | r_Q10 = silk_SUB32( x_Q10[ i ], tmp1 ); /* residual error Q10 */ |
| 455 | |
| 456 | /* Flip sign depending on dither */ |
| 457 | if ( psDD->Seed < 0 ) { |
| 458 | r_Q10 = -r_Q10; |
| 459 | } |
| 460 | r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 ); |
| 461 | |
| 462 | /* Find two quantization level candidates and measure their rate-distortion */ |
| 463 | q1_Q10 = silk_SUB32( r_Q10, offset_Q10 ); |
| 464 | q1_Q0 = silk_RSHIFT( q1_Q10, 10 ); |
| 465 | if( q1_Q0 > 0 ) { |
| 466 | q1_Q10 = silk_SUB32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
| 467 | q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
| 468 | q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
| 469 | rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
| 470 | rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 471 | } else if( q1_Q0 == 0 ) { |
| 472 | q1_Q10 = offset_Q10; |
| 473 | q2_Q10 = silk_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
| 474 | rd1_Q10 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
| 475 | rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 476 | } else if( q1_Q0 == -1 ) { |
| 477 | q2_Q10 = offset_Q10; |
| 478 | q1_Q10 = silk_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
| 479 | rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
| 480 | rd2_Q10 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 481 | } else { /* q1_Q0 < -1 */ |
| 482 | q1_Q10 = silk_ADD32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
| 483 | q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
| 484 | q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
| 485 | rd1_Q10 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
| 486 | rd2_Q10 = silk_SMULBB( -q2_Q10, Lambda_Q10 ); |
| 487 | } |
| 488 | rr_Q10 = silk_SUB32( r_Q10, q1_Q10 ); |
| 489 | rd1_Q10 = silk_RSHIFT( silk_SMLABB( rd1_Q10, rr_Q10, rr_Q10 ), 10 ); |
| 490 | rr_Q10 = silk_SUB32( r_Q10, q2_Q10 ); |
| 491 | rd2_Q10 = silk_RSHIFT( silk_SMLABB( rd2_Q10, rr_Q10, rr_Q10 ), 10 ); |
| 492 | |
| 493 | if( rd1_Q10 < rd2_Q10 ) { |
| 494 | psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); |
| 495 | psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); |
| 496 | psSS[ 0 ].Q_Q10 = q1_Q10; |
| 497 | psSS[ 1 ].Q_Q10 = q2_Q10; |
| 498 | } else { |
| 499 | psSS[ 0 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd2_Q10 ); |
| 500 | psSS[ 1 ].RD_Q10 = silk_ADD32( psDD->RD_Q10, rd1_Q10 ); |
| 501 | psSS[ 0 ].Q_Q10 = q2_Q10; |
| 502 | psSS[ 1 ].Q_Q10 = q1_Q10; |
| 503 | } |
| 504 | |
| 505 | /* Update states for best quantization */ |
| 506 | |
| 507 | /* Quantized excitation */ |
| 508 | exc_Q14 = silk_LSHIFT32( psSS[ 0 ].Q_Q10, 4 ); |
| 509 | if ( psDD->Seed < 0 ) { |
| 510 | exc_Q14 = -exc_Q14; |
| 511 | } |
| 512 | |
| 513 | /* Add predictions */ |
| 514 | LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); |
| 515 | xq_Q14 = silk_ADD32( LPC_exc_Q14, LPC_pred_Q14 ); |
| 516 | |
| 517 | /* Update states */ |
| 518 | sLF_AR_shp_Q14 = silk_SUB32( xq_Q14, n_AR_Q14 ); |
| 519 | psSS[ 0 ].sLTP_shp_Q14 = silk_SUB32( sLF_AR_shp_Q14, n_LF_Q14 ); |
| 520 | psSS[ 0 ].LF_AR_Q14 = sLF_AR_shp_Q14; |
| 521 | psSS[ 0 ].LPC_exc_Q14 = LPC_exc_Q14; |
| 522 | psSS[ 0 ].xq_Q14 = xq_Q14; |
| 523 | |
| 524 | /* Update states for second best quantization */ |
| 525 | |
| 526 | /* Quantized excitation */ |
| 527 | exc_Q14 = silk_LSHIFT32( psSS[ 1 ].Q_Q10, 4 ); |
| 528 | if ( psDD->Seed < 0 ) { |
| 529 | exc_Q14 = -exc_Q14; |
| 530 | } |
| 531 | |
| 532 | |
| 533 | /* Add predictions */ |
| 534 | LPC_exc_Q14 = silk_ADD32( exc_Q14, LTP_pred_Q14 ); |
| 535 | xq_Q14 = silk_ADD32( LPC_exc_Q14, LPC_pred_Q14 ); |
| 536 | |
| 537 | /* Update states */ |
| 538 | sLF_AR_shp_Q14 = silk_SUB32( xq_Q14, n_AR_Q14 ); |
| 539 | psSS[ 1 ].sLTP_shp_Q14 = silk_SUB32( sLF_AR_shp_Q14, n_LF_Q14 ); |
| 540 | psSS[ 1 ].LF_AR_Q14 = sLF_AR_shp_Q14; |
| 541 | psSS[ 1 ].LPC_exc_Q14 = LPC_exc_Q14; |
| 542 | psSS[ 1 ].xq_Q14 = xq_Q14; |
| 543 | } |
| 544 | |
| 545 | *smpl_buf_idx = ( *smpl_buf_idx - 1 ) & DECISION_DELAY_MASK; /* Index to newest samples */ |
| 546 | last_smple_idx = ( *smpl_buf_idx + decisionDelay ) & DECISION_DELAY_MASK; /* Index to decisionDelay old samples */ |
| 547 | |
| 548 | /* Find winner */ |
| 549 | RDmin_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; |
| 550 | Winner_ind = 0; |
| 551 | for( k = 1; k < nStatesDelayedDecision; k++ ) { |
| 552 | if( psSampleState[ k ][ 0 ].RD_Q10 < RDmin_Q10 ) { |
| 553 | RDmin_Q10 = psSampleState[ k ][ 0 ].RD_Q10; |
| 554 | Winner_ind = k; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* Increase RD values of expired states */ |
| 559 | Winner_rand_state = psDelDec[ Winner_ind ].RandState[ last_smple_idx ]; |
| 560 | for( k = 0; k < nStatesDelayedDecision; k++ ) { |
| 561 | if( psDelDec[ k ].RandState[ last_smple_idx ] != Winner_rand_state ) { |
| 562 | psSampleState[ k ][ 0 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 0 ].RD_Q10, silk_int32_MAX >> 4 ); |
| 563 | psSampleState[ k ][ 1 ].RD_Q10 = silk_ADD32( psSampleState[ k ][ 1 ].RD_Q10, silk_int32_MAX >> 4 ); |
| 564 | silk_assert( psSampleState[ k ][ 0 ].RD_Q10 >= 0 ); |
| 565 | } |
| 566 | } |
| 567 | |
| 568 | /* Find worst in first set and best in second set */ |
| 569 | RDmax_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10; |
| 570 | RDmin_Q10 = psSampleState[ 0 ][ 1 ].RD_Q10; |
| 571 | RDmax_ind = 0; |
| 572 | RDmin_ind = 0; |
| 573 | for( k = 1; k < nStatesDelayedDecision; k++ ) { |
| 574 | /* find worst in first set */ |
| 575 | if( psSampleState[ k ][ 0 ].RD_Q10 > RDmax_Q10 ) { |
| 576 | RDmax_Q10 = psSampleState[ k ][ 0 ].RD_Q10; |
| 577 | RDmax_ind = k; |
| 578 | } |
| 579 | /* find best in second set */ |
| 580 | if( psSampleState[ k ][ 1 ].RD_Q10 < RDmin_Q10 ) { |
| 581 | RDmin_Q10 = psSampleState[ k ][ 1 ].RD_Q10; |
| 582 | RDmin_ind = k; |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /* Replace a state if best from second set outperforms worst in first set */ |
| 587 | if( RDmin_Q10 < RDmax_Q10 ) { |
| 588 | silk_memcpy( ( (opus_int32 *)&psDelDec[ RDmax_ind ] ) + i, |
| 589 | ( (opus_int32 *)&psDelDec[ RDmin_ind ] ) + i, sizeof( NSQ_del_dec_struct ) - i * sizeof( opus_int32) ); |
| 590 | silk_memcpy( &psSampleState[ RDmax_ind ][ 0 ], &psSampleState[ RDmin_ind ][ 1 ], sizeof( NSQ_sample_struct ) ); |
| 591 | } |
| 592 | |
| 593 | /* Write samples from winner to output and long-term filter states */ |
| 594 | psDD = &psDelDec[ Winner_ind ]; |
| 595 | if( subfr > 0 || i >= decisionDelay ) { |
| 596 | pulses[ i - decisionDelay ] = (opus_int8)silk_RSHIFT_ROUND( psDD->Q_Q10[ last_smple_idx ], 10 ); |
| 597 | xq[ i - decisionDelay ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( |
| 598 | silk_SMULWW( psDD->Xq_Q14[ last_smple_idx ], delayedGain_Q10[ last_smple_idx ] ), 8 ) ); |
| 599 | NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - decisionDelay ] = psDD->Shape_Q14[ last_smple_idx ]; |
| 600 | sLTP_Q15[ NSQ->sLTP_buf_idx - decisionDelay ] = psDD->Pred_Q15[ last_smple_idx ]; |
| 601 | } |
| 602 | NSQ->sLTP_shp_buf_idx++; |
| 603 | NSQ->sLTP_buf_idx++; |
| 604 | |
| 605 | /* Update states */ |
| 606 | for( k = 0; k < nStatesDelayedDecision; k++ ) { |
| 607 | psDD = &psDelDec[ k ]; |
| 608 | psSS = &psSampleState[ k ][ 0 ]; |
| 609 | psDD->LF_AR_Q14 = psSS->LF_AR_Q14; |
| 610 | psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH + i ] = psSS->xq_Q14; |
| 611 | psDD->Xq_Q14[ *smpl_buf_idx ] = psSS->xq_Q14; |
| 612 | psDD->Q_Q10[ *smpl_buf_idx ] = psSS->Q_Q10; |
| 613 | psDD->Pred_Q15[ *smpl_buf_idx ] = silk_LSHIFT32( psSS->LPC_exc_Q14, 1 ); |
| 614 | psDD->Shape_Q14[ *smpl_buf_idx ] = psSS->sLTP_shp_Q14; |
| 615 | psDD->Seed = silk_ADD32_ovflw( psDD->Seed, silk_RSHIFT_ROUND( psSS->Q_Q10, 10 ) ); |
| 616 | psDD->RandState[ *smpl_buf_idx ] = psDD->Seed; |
| 617 | psDD->RD_Q10 = psSS->RD_Q10; |
| 618 | } |
| 619 | delayedGain_Q10[ *smpl_buf_idx ] = Gain_Q10; |
| 620 | } |
| 621 | /* Update LPC states */ |
| 622 | for( k = 0; k < nStatesDelayedDecision; k++ ) { |
| 623 | psDD = &psDelDec[ k ]; |
| 624 | silk_memcpy( psDD->sLPC_Q14, &psDD->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
| 625 | } |
| 626 | RESTORE_STACK; |
| 627 | } |
flim | c91ee5b | 2016-01-26 14:33:44 +0100 | [diff] [blame] | 628 | #endif /* OVERRIDE_silk_noise_shape_quantizer_del_dec */ |
Vignesh Venkatasubramanian | 2bd8b54 | 2014-02-20 10:50:35 -0800 | [diff] [blame] | 629 | |
| 630 | static OPUS_INLINE void silk_nsq_del_dec_scale_states( |
| 631 | const silk_encoder_state *psEncC, /* I Encoder State */ |
| 632 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 633 | NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */ |
| 634 | const opus_int32 x_Q3[], /* I Input in Q3 */ |
| 635 | opus_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */ |
| 636 | const opus_int16 sLTP[], /* I Re-whitened LTP state in Q0 */ |
| 637 | opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
| 638 | opus_int subfr, /* I Subframe number */ |
| 639 | opus_int nStatesDelayedDecision, /* I Number of del dec states */ |
| 640 | const opus_int LTP_scale_Q14, /* I LTP state scaling */ |
| 641 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
| 642 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
| 643 | const opus_int signal_type, /* I Signal type */ |
| 644 | const opus_int decisionDelay /* I Decision delay */ |
| 645 | ) |
| 646 | { |
| 647 | opus_int i, k, lag; |
| 648 | opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q23; |
| 649 | NSQ_del_dec_struct *psDD; |
| 650 | |
| 651 | lag = pitchL[ subfr ]; |
| 652 | inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 ); |
| 653 | silk_assert( inv_gain_Q31 != 0 ); |
| 654 | |
| 655 | /* Calculate gain adjustment factor */ |
| 656 | if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) { |
| 657 | gain_adj_Q16 = silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 ); |
| 658 | } else { |
| 659 | gain_adj_Q16 = (opus_int32)1 << 16; |
| 660 | } |
| 661 | |
| 662 | /* Scale input */ |
| 663 | inv_gain_Q23 = silk_RSHIFT_ROUND( inv_gain_Q31, 8 ); |
| 664 | for( i = 0; i < psEncC->subfr_length; i++ ) { |
| 665 | x_sc_Q10[ i ] = silk_SMULWW( x_Q3[ i ], inv_gain_Q23 ); |
| 666 | } |
| 667 | |
| 668 | /* Save inverse gain */ |
| 669 | NSQ->prev_gain_Q16 = Gains_Q16[ subfr ]; |
| 670 | |
| 671 | /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */ |
| 672 | if( NSQ->rewhite_flag ) { |
| 673 | if( subfr == 0 ) { |
| 674 | /* Do LTP downscaling */ |
| 675 | inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 ); |
| 676 | } |
| 677 | for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) { |
| 678 | silk_assert( i < MAX_FRAME_LENGTH ); |
| 679 | sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] ); |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | /* Adjust for changing gain */ |
| 684 | if( gain_adj_Q16 != (opus_int32)1 << 16 ) { |
| 685 | /* Scale long-term shaping state */ |
| 686 | for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) { |
| 687 | NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] ); |
| 688 | } |
| 689 | |
| 690 | /* Scale long-term prediction state */ |
| 691 | if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) { |
| 692 | for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx - decisionDelay; i++ ) { |
| 693 | sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] ); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | for( k = 0; k < nStatesDelayedDecision; k++ ) { |
| 698 | psDD = &psDelDec[ k ]; |
| 699 | |
| 700 | /* Scale scalar states */ |
| 701 | psDD->LF_AR_Q14 = silk_SMULWW( gain_adj_Q16, psDD->LF_AR_Q14 ); |
| 702 | |
| 703 | /* Scale short-term prediction and shaping states */ |
| 704 | for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) { |
| 705 | psDD->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sLPC_Q14[ i ] ); |
| 706 | } |
| 707 | for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) { |
| 708 | psDD->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->sAR2_Q14[ i ] ); |
| 709 | } |
| 710 | for( i = 0; i < DECISION_DELAY; i++ ) { |
| 711 | psDD->Pred_Q15[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Pred_Q15[ i ] ); |
| 712 | psDD->Shape_Q14[ i ] = silk_SMULWW( gain_adj_Q16, psDD->Shape_Q14[ i ] ); |
| 713 | } |
| 714 | } |
| 715 | } |
| 716 | } |