Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions |
| 5 | are met: |
| 6 | - Redistributions of source code must retain the above copyright notice, |
| 7 | this list of conditions and the following disclaimer. |
| 8 | - Redistributions in binary form must reproduce the above copyright |
| 9 | notice, this list of conditions and the following disclaimer in the |
| 10 | documentation and/or other materials provided with the distribution. |
| 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| 12 | names of specific contributors, may be used to endorse or promote |
| 13 | products derived from this software without specific prior written |
| 14 | permission. |
| 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” |
| 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | POSSIBILITY OF SUCH DAMAGE. |
| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "main.h" |
| 33 | |
| 34 | static inline void silk_nsq_scale_states( |
| 35 | const silk_encoder_state *psEncC, /* I Encoder State */ |
| 36 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 37 | const opus_int32 x_Q3[], /* I input in Q3 */ |
| 38 | opus_int32 x_sc_Q10[], /* O input scaled with 1/Gain */ |
| 39 | const opus_int16 sLTP[], /* I re-whitened LTP state in Q0 */ |
| 40 | opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
| 41 | opus_int subfr, /* I subframe number */ |
| 42 | const opus_int LTP_scale_Q14, /* I */ |
| 43 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
| 44 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
| 45 | const opus_int signal_type /* I Signal type */ |
| 46 | ); |
| 47 | |
| 48 | static inline void silk_noise_shape_quantizer( |
| 49 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 50 | opus_int signalType, /* I Signal type */ |
| 51 | const opus_int32 x_sc_Q10[], /* I */ |
| 52 | opus_int8 pulses[], /* O */ |
| 53 | opus_int16 xq[], /* O */ |
| 54 | opus_int32 sLTP_Q15[], /* I/O LTP state */ |
| 55 | const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
| 56 | const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
| 57 | const opus_int16 AR_shp_Q13[], /* I Noise shaping AR coefs */ |
| 58 | opus_int lag, /* I Pitch lag */ |
| 59 | opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
| 60 | opus_int Tilt_Q14, /* I Spectral tilt */ |
| 61 | opus_int32 LF_shp_Q14, /* I */ |
| 62 | opus_int32 Gain_Q16, /* I */ |
| 63 | opus_int Lambda_Q10, /* I */ |
| 64 | opus_int offset_Q10, /* I */ |
| 65 | opus_int length, /* I Input length */ |
| 66 | opus_int shapingLPCOrder, /* I Noise shaping AR filter order */ |
| 67 | opus_int predictLPCOrder /* I Prediction filter order */ |
| 68 | ); |
| 69 | |
| 70 | void silk_NSQ( |
| 71 | const silk_encoder_state *psEncC, /* I/O Encoder State */ |
| 72 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 73 | SideInfoIndices *psIndices, /* I/O Quantization Indices */ |
| 74 | const opus_int32 x_Q3[], /* I Prefiltered input signal */ |
| 75 | opus_int8 pulses[], /* O Quantized pulse signal */ |
| 76 | const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */ |
| 77 | const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */ |
| 78 | const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */ |
| 79 | const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */ |
| 80 | const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */ |
| 81 | const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */ |
| 82 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */ |
| 83 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */ |
| 84 | const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */ |
| 85 | const opus_int LTP_scale_Q14 /* I LTP state scaling */ |
| 86 | ) |
| 87 | { |
| 88 | opus_int k, lag, start_idx, LSF_interpolation_flag; |
| 89 | const opus_int16 *A_Q12, *B_Q14, *AR_shp_Q13; |
| 90 | opus_int16 *pxq; |
| 91 | opus_int32 sLTP_Q15[ 2 * MAX_FRAME_LENGTH ]; |
| 92 | opus_int16 sLTP[ 2 * MAX_FRAME_LENGTH ]; |
| 93 | opus_int32 HarmShapeFIRPacked_Q14; |
| 94 | opus_int offset_Q10; |
| 95 | opus_int32 x_sc_Q10[ MAX_SUB_FRAME_LENGTH ]; |
| 96 | |
| 97 | NSQ->rand_seed = psIndices->Seed; |
| 98 | |
| 99 | /* Set unvoiced lag to the previous one, overwrite later for voiced */ |
| 100 | lag = NSQ->lagPrev; |
| 101 | |
| 102 | silk_assert( NSQ->prev_gain_Q16 != 0 ); |
| 103 | |
| 104 | offset_Q10 = silk_Quantization_Offsets_Q10[ psIndices->signalType >> 1 ][ psIndices->quantOffsetType ]; |
| 105 | |
| 106 | if( psIndices->NLSFInterpCoef_Q2 == 4 ) { |
| 107 | LSF_interpolation_flag = 0; |
| 108 | } else { |
| 109 | LSF_interpolation_flag = 1; |
| 110 | } |
| 111 | |
| 112 | /* Set up pointers to start of sub frame */ |
| 113 | NSQ->sLTP_shp_buf_idx = psEncC->ltp_mem_length; |
| 114 | NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
| 115 | pxq = &NSQ->xq[ psEncC->ltp_mem_length ]; |
| 116 | for( k = 0; k < psEncC->nb_subfr; k++ ) { |
| 117 | A_Q12 = &PredCoef_Q12[ (( k >> 1 ) | ( 1 - LSF_interpolation_flag )) * MAX_LPC_ORDER ]; |
| 118 | B_Q14 = <PCoef_Q14[ k * LTP_ORDER ]; |
| 119 | AR_shp_Q13 = &AR2_Q13[ k * MAX_SHAPE_LPC_ORDER ]; |
| 120 | |
| 121 | /* Noise shape parameters */ |
| 122 | silk_assert( HarmShapeGain_Q14[ k ] >= 0 ); |
| 123 | HarmShapeFIRPacked_Q14 = silk_RSHIFT( HarmShapeGain_Q14[ k ], 2 ); |
| 124 | HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 ); |
| 125 | |
| 126 | NSQ->rewhite_flag = 0; |
| 127 | if( psIndices->signalType == TYPE_VOICED ) { |
| 128 | /* Voiced */ |
| 129 | lag = pitchL[ k ]; |
| 130 | |
| 131 | /* Re-whitening */ |
| 132 | if( ( k & ( 3 - silk_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) { |
| 133 | /* Rewhiten with new A coefs */ |
| 134 | start_idx = psEncC->ltp_mem_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2; |
| 135 | silk_assert( start_idx > 0 ); |
| 136 | |
| 137 | silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_idx + k * psEncC->subfr_length ], |
| 138 | A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLPCOrder ); |
| 139 | |
| 140 | NSQ->rewhite_flag = 1; |
| 141 | NSQ->sLTP_buf_idx = psEncC->ltp_mem_length; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | silk_nsq_scale_states( psEncC, NSQ, x_Q3, x_sc_Q10, sLTP, sLTP_Q15, k, LTP_scale_Q14, Gains_Q16, pitchL, psIndices->signalType ); |
| 146 | |
| 147 | silk_noise_shape_quantizer( NSQ, psIndices->signalType, x_sc_Q10, pulses, pxq, sLTP_Q15, A_Q12, B_Q14, |
| 148 | AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ], Lambda_Q10, |
| 149 | offset_Q10, psEncC->subfr_length, psEncC->shapingLPCOrder, psEncC->predictLPCOrder ); |
| 150 | |
| 151 | x_Q3 += psEncC->subfr_length; |
| 152 | pulses += psEncC->subfr_length; |
| 153 | pxq += psEncC->subfr_length; |
| 154 | } |
| 155 | |
| 156 | /* Update lagPrev for next frame */ |
| 157 | NSQ->lagPrev = pitchL[ psEncC->nb_subfr - 1 ]; |
| 158 | |
| 159 | /* Save quantized speech and noise shaping signals */ |
| 160 | /* DEBUG_STORE_DATA( enc.pcm, &NSQ->xq[ psEncC->ltp_mem_length ], psEncC->frame_length * sizeof( opus_int16 ) ) */ |
| 161 | silk_memmove( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int16 ) ); |
| 162 | silk_memmove( NSQ->sLTP_shp_Q14, &NSQ->sLTP_shp_Q14[ psEncC->frame_length ], psEncC->ltp_mem_length * sizeof( opus_int32 ) ); |
| 163 | } |
| 164 | |
| 165 | /***********************************/ |
| 166 | /* silk_noise_shape_quantizer */ |
| 167 | /***********************************/ |
| 168 | static inline void silk_noise_shape_quantizer( |
| 169 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 170 | opus_int signalType, /* I Signal type */ |
| 171 | const opus_int32 x_sc_Q10[], /* I */ |
| 172 | opus_int8 pulses[], /* O */ |
| 173 | opus_int16 xq[], /* O */ |
| 174 | opus_int32 sLTP_Q15[], /* I/O LTP state */ |
| 175 | const opus_int16 a_Q12[], /* I Short term prediction coefs */ |
| 176 | const opus_int16 b_Q14[], /* I Long term prediction coefs */ |
| 177 | const opus_int16 AR_shp_Q13[], /* I Noise shaping AR coefs */ |
| 178 | opus_int lag, /* I Pitch lag */ |
| 179 | opus_int32 HarmShapeFIRPacked_Q14, /* I */ |
| 180 | opus_int Tilt_Q14, /* I Spectral tilt */ |
| 181 | opus_int32 LF_shp_Q14, /* I */ |
| 182 | opus_int32 Gain_Q16, /* I */ |
| 183 | opus_int Lambda_Q10, /* I */ |
| 184 | opus_int offset_Q10, /* I */ |
| 185 | opus_int length, /* I Input length */ |
| 186 | opus_int shapingLPCOrder, /* I Noise shaping AR filter order */ |
| 187 | opus_int predictLPCOrder /* I Prediction filter order */ |
| 188 | ) |
| 189 | { |
| 190 | opus_int i, j; |
| 191 | opus_int32 LTP_pred_Q13, LPC_pred_Q10, n_AR_Q12, n_LTP_Q13; |
| 192 | opus_int32 n_LF_Q12, r_Q10, rr_Q10, q1_Q0, q1_Q10, q2_Q10, rd1_Q20, rd2_Q20; |
| 193 | opus_int32 exc_Q14, LPC_exc_Q14, xq_Q14, Gain_Q10; |
| 194 | opus_int32 tmp1, tmp2, sLF_AR_shp_Q14; |
| 195 | opus_int32 *psLPC_Q14, *shp_lag_ptr, *pred_lag_ptr; |
| 196 | |
| 197 | shp_lag_ptr = &NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ]; |
| 198 | pred_lag_ptr = &sLTP_Q15[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ]; |
| 199 | Gain_Q10 = silk_RSHIFT( Gain_Q16, 6 ); |
| 200 | |
| 201 | /* Set up short term AR state */ |
| 202 | psLPC_Q14 = &NSQ->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 ]; |
| 203 | |
| 204 | for( i = 0; i < length; i++ ) { |
| 205 | /* Generate dither */ |
| 206 | NSQ->rand_seed = silk_RAND( NSQ->rand_seed ); |
| 207 | |
| 208 | /* Short-term prediction */ |
| 209 | silk_assert( predictLPCOrder == 10 || predictLPCOrder == 16 ); |
| 210 | /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ |
| 211 | LPC_pred_Q10 = silk_RSHIFT( predictLPCOrder, 1 ); |
| 212 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ 0 ], a_Q12[ 0 ] ); |
| 213 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -1 ], a_Q12[ 1 ] ); |
| 214 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -2 ], a_Q12[ 2 ] ); |
| 215 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -3 ], a_Q12[ 3 ] ); |
| 216 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -4 ], a_Q12[ 4 ] ); |
| 217 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -5 ], a_Q12[ 5 ] ); |
| 218 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -6 ], a_Q12[ 6 ] ); |
| 219 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -7 ], a_Q12[ 7 ] ); |
| 220 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -8 ], a_Q12[ 8 ] ); |
| 221 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -9 ], a_Q12[ 9 ] ); |
| 222 | if( predictLPCOrder == 16 ) { |
| 223 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -10 ], a_Q12[ 10 ] ); |
| 224 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -11 ], a_Q12[ 11 ] ); |
| 225 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -12 ], a_Q12[ 12 ] ); |
| 226 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -13 ], a_Q12[ 13 ] ); |
| 227 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -14 ], a_Q12[ 14 ] ); |
| 228 | LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -15 ], a_Q12[ 15 ] ); |
| 229 | } |
| 230 | |
| 231 | /* Long-term prediction */ |
| 232 | if( signalType == TYPE_VOICED ) { |
| 233 | /* Unrolled loop */ |
| 234 | /* Avoids introducing a bias because silk_SMLAWB() always rounds to -inf */ |
| 235 | LTP_pred_Q13 = 2; |
| 236 | LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ 0 ], b_Q14[ 0 ] ); |
| 237 | LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -1 ], b_Q14[ 1 ] ); |
| 238 | LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -2 ], b_Q14[ 2 ] ); |
| 239 | LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -3 ], b_Q14[ 3 ] ); |
| 240 | LTP_pred_Q13 = silk_SMLAWB( LTP_pred_Q13, pred_lag_ptr[ -4 ], b_Q14[ 4 ] ); |
| 241 | pred_lag_ptr++; |
| 242 | } else { |
| 243 | LTP_pred_Q13 = 0; |
| 244 | } |
| 245 | |
| 246 | /* Noise shape feedback */ |
| 247 | silk_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */ |
| 248 | tmp2 = psLPC_Q14[ 0 ]; |
| 249 | tmp1 = NSQ->sAR2_Q14[ 0 ]; |
| 250 | NSQ->sAR2_Q14[ 0 ] = tmp2; |
| 251 | n_AR_Q12 = silk_RSHIFT( shapingLPCOrder, 1 ); |
| 252 | n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp2, AR_shp_Q13[ 0 ] ); |
| 253 | for( j = 2; j < shapingLPCOrder; j += 2 ) { |
| 254 | tmp2 = NSQ->sAR2_Q14[ j - 1 ]; |
| 255 | NSQ->sAR2_Q14[ j - 1 ] = tmp1; |
| 256 | n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp1, AR_shp_Q13[ j - 1 ] ); |
| 257 | tmp1 = NSQ->sAR2_Q14[ j + 0 ]; |
| 258 | NSQ->sAR2_Q14[ j + 0 ] = tmp2; |
| 259 | n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp2, AR_shp_Q13[ j ] ); |
| 260 | } |
| 261 | NSQ->sAR2_Q14[ shapingLPCOrder - 1 ] = tmp1; |
| 262 | n_AR_Q12 = silk_SMLAWB( n_AR_Q12, tmp1, AR_shp_Q13[ shapingLPCOrder - 1 ] ); |
| 263 | |
| 264 | n_AR_Q12 = silk_LSHIFT32( n_AR_Q12, 1 ); /* Q11 -> Q12 */ |
| 265 | n_AR_Q12 = silk_SMLAWB( n_AR_Q12, NSQ->sLF_AR_shp_Q14, Tilt_Q14 ); |
| 266 | |
| 267 | n_LF_Q12 = silk_SMULWB( NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx - 1 ], LF_shp_Q14 ); |
| 268 | n_LF_Q12 = silk_SMLAWT( n_LF_Q12, NSQ->sLF_AR_shp_Q14, LF_shp_Q14 ); |
| 269 | |
| 270 | silk_assert( lag > 0 || signalType != TYPE_VOICED ); |
| 271 | |
| 272 | /* Combine prediction and noise shaping signals */ |
| 273 | tmp1 = silk_SUB32( silk_LSHIFT32( LPC_pred_Q10, 2 ), n_AR_Q12 ); /* Q12 */ |
| 274 | tmp1 = silk_SUB32( tmp1, n_LF_Q12 ); /* Q12 */ |
| 275 | if( lag > 0 ) { |
| 276 | /* Symmetric, packed FIR coefficients */ |
| 277 | n_LTP_Q13 = silk_SMULWB( silk_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 ); |
| 278 | n_LTP_Q13 = silk_SMLAWT( n_LTP_Q13, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 ); |
| 279 | n_LTP_Q13 = silk_LSHIFT( n_LTP_Q13, 1 ); |
| 280 | shp_lag_ptr++; |
| 281 | |
| 282 | tmp2 = silk_SUB32( LTP_pred_Q13, n_LTP_Q13 ); /* Q13 */ |
| 283 | tmp1 = silk_ADD_LSHIFT32( tmp2, tmp1, 1 ); /* Q13 */ |
| 284 | tmp1 = silk_RSHIFT_ROUND( tmp1, 3 ); /* Q10 */ |
| 285 | } else { |
| 286 | tmp1 = silk_RSHIFT_ROUND( tmp1, 2 ); /* Q10 */ |
| 287 | } |
| 288 | |
| 289 | r_Q10 = silk_SUB32( x_sc_Q10[ i ], tmp1 ); /* residual error Q10 */ |
| 290 | |
| 291 | /* Flip sign depending on dither */ |
| 292 | if ( NSQ->rand_seed < 0 ) { |
| 293 | r_Q10 = -r_Q10; |
| 294 | } |
| 295 | r_Q10 = silk_LIMIT_32( r_Q10, -(31 << 10), 30 << 10 ); |
| 296 | |
| 297 | /* Find two quantization level candidates and measure their rate-distortion */ |
| 298 | q1_Q10 = silk_SUB32( r_Q10, offset_Q10 ); |
| 299 | q1_Q0 = silk_RSHIFT( q1_Q10, 10 ); |
| 300 | if( q1_Q0 > 0 ) { |
| 301 | q1_Q10 = silk_SUB32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
| 302 | q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
| 303 | q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
| 304 | rd1_Q20 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
| 305 | rd2_Q20 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 306 | } else if( q1_Q0 == 0 ) { |
| 307 | q1_Q10 = offset_Q10; |
| 308 | q2_Q10 = silk_ADD32( q1_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
| 309 | rd1_Q20 = silk_SMULBB( q1_Q10, Lambda_Q10 ); |
| 310 | rd2_Q20 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 311 | } else if( q1_Q0 == -1 ) { |
| 312 | q2_Q10 = offset_Q10; |
| 313 | q1_Q10 = silk_SUB32( q2_Q10, 1024 - QUANT_LEVEL_ADJUST_Q10 ); |
| 314 | rd1_Q20 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
| 315 | rd2_Q20 = silk_SMULBB( q2_Q10, Lambda_Q10 ); |
| 316 | } else { /* Q1_Q0 < -1 */ |
| 317 | q1_Q10 = silk_ADD32( silk_LSHIFT( q1_Q0, 10 ), QUANT_LEVEL_ADJUST_Q10 ); |
| 318 | q1_Q10 = silk_ADD32( q1_Q10, offset_Q10 ); |
| 319 | q2_Q10 = silk_ADD32( q1_Q10, 1024 ); |
| 320 | rd1_Q20 = silk_SMULBB( -q1_Q10, Lambda_Q10 ); |
| 321 | rd2_Q20 = silk_SMULBB( -q2_Q10, Lambda_Q10 ); |
| 322 | } |
| 323 | rr_Q10 = silk_SUB32( r_Q10, q1_Q10 ); |
| 324 | rd1_Q20 = silk_SMLABB( rd1_Q20, rr_Q10, rr_Q10 ); |
| 325 | rr_Q10 = silk_SUB32( r_Q10, q2_Q10 ); |
| 326 | rd2_Q20 = silk_SMLABB( rd2_Q20, rr_Q10, rr_Q10 ); |
| 327 | |
| 328 | if( rd2_Q20 < rd1_Q20 ) { |
| 329 | q1_Q10 = q2_Q10; |
| 330 | } |
| 331 | |
| 332 | pulses[ i ] = (opus_int8)silk_RSHIFT_ROUND( q1_Q10, 10 ); |
| 333 | |
| 334 | /* Excitation */ |
| 335 | exc_Q14 = silk_LSHIFT( q1_Q10, 4 ); |
| 336 | if ( NSQ->rand_seed < 0 ) { |
| 337 | exc_Q14 = -exc_Q14; |
| 338 | } |
| 339 | |
| 340 | /* Add predictions */ |
| 341 | LPC_exc_Q14 = silk_ADD_LSHIFT32( exc_Q14, LTP_pred_Q13, 1 ); |
| 342 | xq_Q14 = silk_ADD_LSHIFT32( LPC_exc_Q14, LPC_pred_Q10, 4 ); |
| 343 | |
| 344 | /* Scale XQ back to normal level before saving */ |
| 345 | xq[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SMULWW( xq_Q14, Gain_Q10 ), 8 ) ); |
| 346 | |
| 347 | /* Update states */ |
| 348 | psLPC_Q14++; |
| 349 | *psLPC_Q14 = xq_Q14; |
| 350 | sLF_AR_shp_Q14 = silk_SUB_LSHIFT32( xq_Q14, n_AR_Q12, 2 ); |
| 351 | NSQ->sLF_AR_shp_Q14 = sLF_AR_shp_Q14; |
| 352 | |
| 353 | NSQ->sLTP_shp_Q14[ NSQ->sLTP_shp_buf_idx ] = silk_SUB_LSHIFT32( sLF_AR_shp_Q14, n_LF_Q12, 2 ); |
| 354 | sLTP_Q15[ NSQ->sLTP_buf_idx ] = silk_LSHIFT( LPC_exc_Q14, 1 ); |
| 355 | NSQ->sLTP_shp_buf_idx++; |
| 356 | NSQ->sLTP_buf_idx++; |
| 357 | |
| 358 | /* Make dither dependent on quantized signal */ |
| 359 | NSQ->rand_seed = silk_ADD32_ovflw( NSQ->rand_seed, pulses[ i ] ); |
| 360 | } |
| 361 | |
| 362 | /* Update LPC synth buffer */ |
| 363 | silk_memcpy( NSQ->sLPC_Q14, &NSQ->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( opus_int32 ) ); |
| 364 | } |
| 365 | |
| 366 | static inline void silk_nsq_scale_states( |
| 367 | const silk_encoder_state *psEncC, /* I Encoder State */ |
| 368 | silk_nsq_state *NSQ, /* I/O NSQ state */ |
| 369 | const opus_int32 x_Q3[], /* I input in Q3 */ |
| 370 | opus_int32 x_sc_Q10[], /* O input scaled with 1/Gain */ |
| 371 | const opus_int16 sLTP[], /* I re-whitened LTP state in Q0 */ |
| 372 | opus_int32 sLTP_Q15[], /* O LTP state matching scaled input */ |
| 373 | opus_int subfr, /* I subframe number */ |
| 374 | const opus_int LTP_scale_Q14, /* I */ |
| 375 | const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I */ |
| 376 | const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag */ |
| 377 | const opus_int signal_type /* I Signal type */ |
| 378 | ) |
| 379 | { |
| 380 | opus_int i, lag; |
| 381 | opus_int32 gain_adj_Q16, inv_gain_Q31, inv_gain_Q23; |
| 382 | |
| 383 | lag = pitchL[ subfr ]; |
| 384 | inv_gain_Q31 = silk_INVERSE32_varQ( silk_max( Gains_Q16[ subfr ], 1 ), 47 ); |
| 385 | silk_assert( inv_gain_Q31 != 0 ); |
| 386 | |
| 387 | /* Calculate gain adjustment factor */ |
| 388 | if( Gains_Q16[ subfr ] != NSQ->prev_gain_Q16 ) { |
| 389 | gain_adj_Q16 = silk_DIV32_varQ( NSQ->prev_gain_Q16, Gains_Q16[ subfr ], 16 ); |
| 390 | } else { |
| 391 | gain_adj_Q16 = (opus_int32)1 << 16; |
| 392 | } |
| 393 | |
| 394 | /* Scale input */ |
| 395 | inv_gain_Q23 = silk_RSHIFT_ROUND( inv_gain_Q31, 8 ); |
| 396 | for( i = 0; i < psEncC->subfr_length; i++ ) { |
| 397 | x_sc_Q10[ i ] = silk_SMULWW( x_Q3[ i ], inv_gain_Q23 ); |
| 398 | } |
| 399 | |
| 400 | /* Save inverse gain */ |
| 401 | NSQ->prev_gain_Q16 = Gains_Q16[ subfr ]; |
| 402 | |
| 403 | /* After rewhitening the LTP state is un-scaled, so scale with inv_gain_Q16 */ |
| 404 | if( NSQ->rewhite_flag ) { |
| 405 | if( subfr == 0 ) { |
| 406 | /* Do LTP downscaling */ |
| 407 | inv_gain_Q31 = silk_LSHIFT( silk_SMULWB( inv_gain_Q31, LTP_scale_Q14 ), 2 ); |
| 408 | } |
| 409 | for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) { |
| 410 | silk_assert( i < MAX_FRAME_LENGTH ); |
| 411 | sLTP_Q15[ i ] = silk_SMULWB( inv_gain_Q31, sLTP[ i ] ); |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | /* Adjust for changing gain */ |
| 416 | if( gain_adj_Q16 != (opus_int32)1 << 16 ) { |
| 417 | /* Scale long-term shaping state */ |
| 418 | for( i = NSQ->sLTP_shp_buf_idx - psEncC->ltp_mem_length; i < NSQ->sLTP_shp_buf_idx; i++ ) { |
| 419 | NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q14[ i ] ); |
| 420 | } |
| 421 | |
| 422 | /* Scale long-term prediction state */ |
| 423 | if( signal_type == TYPE_VOICED && NSQ->rewhite_flag == 0 ) { |
| 424 | for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) { |
| 425 | sLTP_Q15[ i ] = silk_SMULWW( gain_adj_Q16, sLTP_Q15[ i ] ); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | NSQ->sLF_AR_shp_Q14 = silk_SMULWW( gain_adj_Q16, NSQ->sLF_AR_shp_Q14 ); |
| 430 | |
| 431 | /* Scale short-term prediction and shaping states */ |
| 432 | for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) { |
| 433 | NSQ->sLPC_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLPC_Q14[ i ] ); |
| 434 | } |
| 435 | for( i = 0; i < MAX_SHAPE_LPC_ORDER; i++ ) { |
| 436 | NSQ->sAR2_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sAR2_Q14[ i ] ); |
| 437 | } |
| 438 | } |
| 439 | } |