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| 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 scale
d 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 co
efs */ |
| 56 const opus_int16 b_Q14[], /* I Long term prediction coe
fs */ |
| 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 ][ ps
Indices->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( HarmShap
eGain_Q14[ k ], 2 ); |
| 124 HarmShapeFIRPacked_Q14 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShap
eGain_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->predictLPCOrd
er - LTP_ORDER / 2; |
| 135 silk_assert( start_idx > 0 ); |
| 136 |
| 137 silk_LPC_analysis_filter( &sLTP[ start_idx ], &NSQ->xq[ start_id
x + k * psEncC->subfr_length ], |
| 138 A_Q12, psEncC->ltp_mem_length - start_idx, psEncC->predictLP
COrder ); |
| 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, L
TP_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->p
redictLPCOrder ); |
| 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->fr
ame_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 co
efs */ |
| 176 const opus_int16 b_Q14[], /* I Long term prediction coe
fs */ |
| 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_Q2
0; |
| 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[ 1
0 ] ); |
| 224 LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -11 ], a_Q12[ 1
1 ] ); |
| 225 LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -12 ], a_Q12[ 1
2 ] ); |
| 226 LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -13 ], a_Q12[ 1
3 ] ); |
| 227 LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -14 ], a_Q12[ 1
4 ] ); |
| 228 LPC_pred_Q10 = silk_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -15 ], a_Q12[ 1
5 ] ); |
| 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 ev
en */ |
| 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-distort
ion */ |
| 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_Q
10 ); |
| 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_Q
10 ); |
| 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_s
hp_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 * s
izeof( 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 scale
d 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_s
hp_buf_idx; i++ ) { |
| 419 NSQ->sLTP_shp_Q14[ i ] = silk_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q1
4[ 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 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 11196031:
Add copy of opus library in deps/third_party. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/