Alexandre Lision | 744f742 | 2013-09-25 11:39:37 -0400 | [diff] [blame] | 1 | /* Copyright (c) 2007-2008 CSIRO |
| 2 | Copyright (c) 2007-2010 Xiph.Org Foundation |
| 3 | Copyright (c) 2008 Gregory Maxwell |
| 4 | Written by Jean-Marc Valin and Gregory Maxwell */ |
| 5 | /* |
| 6 | Redistribution and use in source and binary forms, with or without |
| 7 | modification, are permitted provided that the following conditions |
| 8 | are met: |
| 9 | |
| 10 | - Redistributions of source code must retain the above copyright |
| 11 | notice, this list of conditions and the following disclaimer. |
| 12 | |
| 13 | - Redistributions in binary form must reproduce the above copyright |
| 14 | notice, this list of conditions and the following disclaimer in the |
| 15 | documentation and/or other materials provided with the distribution. |
| 16 | |
| 17 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 20 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
| 21 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 22 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 23 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 24 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 25 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 26 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 27 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | #include "config.h" |
| 32 | #endif |
| 33 | |
| 34 | #define CELT_C |
| 35 | |
| 36 | #include "os_support.h" |
| 37 | #include "mdct.h" |
| 38 | #include <math.h> |
| 39 | #include "celt.h" |
| 40 | #include "pitch.h" |
| 41 | #include "bands.h" |
| 42 | #include "modes.h" |
| 43 | #include "entcode.h" |
| 44 | #include "quant_bands.h" |
| 45 | #include "rate.h" |
| 46 | #include "stack_alloc.h" |
| 47 | #include "mathops.h" |
| 48 | #include "float_cast.h" |
| 49 | #include <stdarg.h> |
| 50 | #include "celt_lpc.h" |
| 51 | #include "vq.h" |
| 52 | |
| 53 | #ifndef PACKAGE_VERSION |
| 54 | #define PACKAGE_VERSION "unknown" |
| 55 | #endif |
| 56 | |
| 57 | #ifdef CUSTOM_MODES |
| 58 | #define OPUS_CUSTOM_NOSTATIC |
| 59 | #else |
| 60 | #define OPUS_CUSTOM_NOSTATIC static inline |
| 61 | #endif |
| 62 | |
| 63 | static const unsigned char trim_icdf[11] = {126, 124, 119, 109, 87, 41, 19, 9, 4, 2, 0}; |
| 64 | /* Probs: NONE: 21.875%, LIGHT: 6.25%, NORMAL: 65.625%, AGGRESSIVE: 6.25% */ |
| 65 | static const unsigned char spread_icdf[4] = {25, 23, 2, 0}; |
| 66 | |
| 67 | static const unsigned char tapset_icdf[3]={2,1,0}; |
| 68 | |
| 69 | #ifdef CUSTOM_MODES |
| 70 | static const unsigned char toOpusTable[20] = { |
| 71 | 0xE0, 0xE8, 0xF0, 0xF8, |
| 72 | 0xC0, 0xC8, 0xD0, 0xD8, |
| 73 | 0xA0, 0xA8, 0xB0, 0xB8, |
| 74 | 0x00, 0x00, 0x00, 0x00, |
| 75 | 0x80, 0x88, 0x90, 0x98, |
| 76 | }; |
| 77 | |
| 78 | static const unsigned char fromOpusTable[16] = { |
| 79 | 0x80, 0x88, 0x90, 0x98, |
| 80 | 0x40, 0x48, 0x50, 0x58, |
| 81 | 0x20, 0x28, 0x30, 0x38, |
| 82 | 0x00, 0x08, 0x10, 0x18 |
| 83 | }; |
| 84 | |
| 85 | static inline int toOpus(unsigned char c) |
| 86 | { |
| 87 | int ret=0; |
| 88 | if (c<0xA0) |
| 89 | ret = toOpusTable[c>>3]; |
| 90 | if (ret == 0) |
| 91 | return -1; |
| 92 | else |
| 93 | return ret|(c&0x7); |
| 94 | } |
| 95 | |
| 96 | static inline int fromOpus(unsigned char c) |
| 97 | { |
| 98 | if (c<0x80) |
| 99 | return -1; |
| 100 | else |
| 101 | return fromOpusTable[(c>>3)-16] | (c&0x7); |
| 102 | } |
| 103 | #endif /* CUSTOM_MODES */ |
| 104 | |
| 105 | #define COMBFILTER_MAXPERIOD 1024 |
| 106 | #define COMBFILTER_MINPERIOD 15 |
| 107 | |
| 108 | static int resampling_factor(opus_int32 rate) |
| 109 | { |
| 110 | int ret; |
| 111 | switch (rate) |
| 112 | { |
| 113 | case 48000: |
| 114 | ret = 1; |
| 115 | break; |
| 116 | case 24000: |
| 117 | ret = 2; |
| 118 | break; |
| 119 | case 16000: |
| 120 | ret = 3; |
| 121 | break; |
| 122 | case 12000: |
| 123 | ret = 4; |
| 124 | break; |
| 125 | case 8000: |
| 126 | ret = 6; |
| 127 | break; |
| 128 | default: |
| 129 | #ifndef CUSTOM_MODES |
| 130 | celt_assert(0); |
| 131 | #endif |
| 132 | ret = 0; |
| 133 | break; |
| 134 | } |
| 135 | return ret; |
| 136 | } |
| 137 | |
| 138 | /** Encoder state |
| 139 | @brief Encoder state |
| 140 | */ |
| 141 | struct OpusCustomEncoder { |
| 142 | const OpusCustomMode *mode; /**< Mode used by the encoder */ |
| 143 | int overlap; |
| 144 | int channels; |
| 145 | int stream_channels; |
| 146 | |
| 147 | int force_intra; |
| 148 | int clip; |
| 149 | int disable_pf; |
| 150 | int complexity; |
| 151 | int upsample; |
| 152 | int start, end; |
| 153 | |
| 154 | opus_int32 bitrate; |
| 155 | int vbr; |
| 156 | int signalling; |
| 157 | int constrained_vbr; /* If zero, VBR can do whatever it likes with the rate */ |
| 158 | int loss_rate; |
| 159 | int lsb_depth; |
| 160 | |
| 161 | /* Everything beyond this point gets cleared on a reset */ |
| 162 | #define ENCODER_RESET_START rng |
| 163 | |
| 164 | opus_uint32 rng; |
| 165 | int spread_decision; |
| 166 | opus_val32 delayedIntra; |
| 167 | int tonal_average; |
| 168 | int lastCodedBands; |
| 169 | int hf_average; |
| 170 | int tapset_decision; |
| 171 | |
| 172 | int prefilter_period; |
| 173 | opus_val16 prefilter_gain; |
| 174 | int prefilter_tapset; |
| 175 | #ifdef RESYNTH |
| 176 | int prefilter_period_old; |
| 177 | opus_val16 prefilter_gain_old; |
| 178 | int prefilter_tapset_old; |
| 179 | #endif |
| 180 | int consec_transient; |
| 181 | |
| 182 | opus_val32 preemph_memE[2]; |
| 183 | opus_val32 preemph_memD[2]; |
| 184 | |
| 185 | /* VBR-related parameters */ |
| 186 | opus_int32 vbr_reservoir; |
| 187 | opus_int32 vbr_drift; |
| 188 | opus_int32 vbr_offset; |
| 189 | opus_int32 vbr_count; |
| 190 | |
| 191 | #ifdef RESYNTH |
| 192 | celt_sig syn_mem[2][2*MAX_PERIOD]; |
| 193 | #endif |
| 194 | |
| 195 | celt_sig in_mem[1]; /* Size = channels*mode->overlap */ |
| 196 | /* celt_sig prefilter_mem[], Size = channels*COMBFILTER_MAXPERIOD */ |
| 197 | /* opus_val16 oldBandE[], Size = channels*mode->nbEBands */ |
| 198 | /* opus_val16 oldLogE[], Size = channels*mode->nbEBands */ |
| 199 | /* opus_val16 oldLogE2[], Size = channels*mode->nbEBands */ |
| 200 | #ifdef RESYNTH |
| 201 | /* opus_val16 overlap_mem[], Size = channels*overlap */ |
| 202 | #endif |
| 203 | }; |
| 204 | |
| 205 | int celt_encoder_get_size(int channels) |
| 206 | { |
| 207 | CELTMode *mode = opus_custom_mode_create(48000, 960, NULL); |
| 208 | return opus_custom_encoder_get_size(mode, channels); |
| 209 | } |
| 210 | |
| 211 | OPUS_CUSTOM_NOSTATIC int opus_custom_encoder_get_size(const CELTMode *mode, int channels) |
| 212 | { |
| 213 | int size = sizeof(struct CELTEncoder) |
| 214 | + (channels*mode->overlap-1)*sizeof(celt_sig) /* celt_sig in_mem[channels*mode->overlap]; */ |
| 215 | + channels*COMBFILTER_MAXPERIOD*sizeof(celt_sig) /* celt_sig prefilter_mem[channels*COMBFILTER_MAXPERIOD]; */ |
| 216 | + 3*channels*mode->nbEBands*sizeof(opus_val16); /* opus_val16 oldBandE[channels*mode->nbEBands]; */ |
| 217 | /* opus_val16 oldLogE[channels*mode->nbEBands]; */ |
| 218 | /* opus_val16 oldLogE2[channels*mode->nbEBands]; */ |
| 219 | #ifdef RESYNTH |
| 220 | size += channels*mode->overlap*sizeof(celt_sig); /* celt_sig overlap_mem[channels*mode->nbEBands]; */ |
| 221 | #endif |
| 222 | return size; |
| 223 | } |
| 224 | |
| 225 | #ifdef CUSTOM_MODES |
| 226 | CELTEncoder *opus_custom_encoder_create(const CELTMode *mode, int channels, int *error) |
| 227 | { |
| 228 | int ret; |
| 229 | CELTEncoder *st = (CELTEncoder *)opus_alloc(opus_custom_encoder_get_size(mode, channels)); |
| 230 | /* init will handle the NULL case */ |
| 231 | ret = opus_custom_encoder_init(st, mode, channels); |
| 232 | if (ret != OPUS_OK) |
| 233 | { |
| 234 | opus_custom_encoder_destroy(st); |
| 235 | st = NULL; |
| 236 | } |
| 237 | if (error) |
| 238 | *error = ret; |
| 239 | return st; |
| 240 | } |
| 241 | #endif /* CUSTOM_MODES */ |
| 242 | |
| 243 | int celt_encoder_init(CELTEncoder *st, opus_int32 sampling_rate, int channels) |
| 244 | { |
| 245 | int ret; |
| 246 | ret = opus_custom_encoder_init(st, opus_custom_mode_create(48000, 960, NULL), channels); |
| 247 | if (ret != OPUS_OK) |
| 248 | return ret; |
| 249 | st->upsample = resampling_factor(sampling_rate); |
| 250 | return OPUS_OK; |
| 251 | } |
| 252 | |
| 253 | OPUS_CUSTOM_NOSTATIC int opus_custom_encoder_init(CELTEncoder *st, const CELTMode *mode, int channels) |
| 254 | { |
| 255 | if (channels < 0 || channels > 2) |
| 256 | return OPUS_BAD_ARG; |
| 257 | |
| 258 | if (st==NULL || mode==NULL) |
| 259 | return OPUS_ALLOC_FAIL; |
| 260 | |
| 261 | OPUS_CLEAR((char*)st, opus_custom_encoder_get_size(mode, channels)); |
| 262 | |
| 263 | st->mode = mode; |
| 264 | st->overlap = mode->overlap; |
| 265 | st->stream_channels = st->channels = channels; |
| 266 | |
| 267 | st->upsample = 1; |
| 268 | st->start = 0; |
| 269 | st->end = st->mode->effEBands; |
| 270 | st->signalling = 1; |
| 271 | |
| 272 | st->constrained_vbr = 1; |
| 273 | st->clip = 1; |
| 274 | |
| 275 | st->bitrate = OPUS_BITRATE_MAX; |
| 276 | st->vbr = 0; |
| 277 | st->force_intra = 0; |
| 278 | st->complexity = 5; |
| 279 | st->lsb_depth=24; |
| 280 | |
| 281 | opus_custom_encoder_ctl(st, OPUS_RESET_STATE); |
| 282 | |
| 283 | return OPUS_OK; |
| 284 | } |
| 285 | |
| 286 | #ifdef CUSTOM_MODES |
| 287 | void opus_custom_encoder_destroy(CELTEncoder *st) |
| 288 | { |
| 289 | opus_free(st); |
| 290 | } |
| 291 | #endif /* CUSTOM_MODES */ |
| 292 | |
| 293 | static inline opus_val16 SIG2WORD16(celt_sig x) |
| 294 | { |
| 295 | #ifdef FIXED_POINT |
| 296 | x = PSHR32(x, SIG_SHIFT); |
| 297 | x = MAX32(x, -32768); |
| 298 | x = MIN32(x, 32767); |
| 299 | return EXTRACT16(x); |
| 300 | #else |
| 301 | return (opus_val16)x; |
| 302 | #endif |
| 303 | } |
| 304 | |
| 305 | static int transient_analysis(const opus_val32 * OPUS_RESTRICT in, int len, int C, |
| 306 | int overlap) |
| 307 | { |
| 308 | int i; |
| 309 | VARDECL(opus_val16, tmp); |
| 310 | opus_val32 mem0=0,mem1=0; |
| 311 | int is_transient = 0; |
| 312 | int block; |
| 313 | int N; |
| 314 | VARDECL(opus_val16, bins); |
| 315 | SAVE_STACK; |
| 316 | ALLOC(tmp, len, opus_val16); |
| 317 | |
| 318 | block = overlap/2; |
| 319 | N=len/block; |
| 320 | ALLOC(bins, N, opus_val16); |
| 321 | if (C==1) |
| 322 | { |
| 323 | for (i=0;i<len;i++) |
| 324 | tmp[i] = SHR32(in[i],SIG_SHIFT); |
| 325 | } else { |
| 326 | for (i=0;i<len;i++) |
| 327 | tmp[i] = SHR32(ADD32(in[i],in[i+len]), SIG_SHIFT+1); |
| 328 | } |
| 329 | |
| 330 | /* High-pass filter: (1 - 2*z^-1 + z^-2) / (1 - z^-1 + .5*z^-2) */ |
| 331 | for (i=0;i<len;i++) |
| 332 | { |
| 333 | opus_val32 x,y; |
| 334 | x = tmp[i]; |
| 335 | y = ADD32(mem0, x); |
| 336 | #ifdef FIXED_POINT |
| 337 | mem0 = mem1 + y - SHL32(x,1); |
| 338 | mem1 = x - SHR32(y,1); |
| 339 | #else |
| 340 | mem0 = mem1 + y - 2*x; |
| 341 | mem1 = x - .5f*y; |
| 342 | #endif |
| 343 | tmp[i] = EXTRACT16(SHR32(y,2)); |
| 344 | } |
| 345 | /* First few samples are bad because we don't propagate the memory */ |
| 346 | for (i=0;i<12;i++) |
| 347 | tmp[i] = 0; |
| 348 | |
| 349 | for (i=0;i<N;i++) |
| 350 | { |
| 351 | int j; |
| 352 | opus_val16 max_abs=0; |
| 353 | for (j=0;j<block;j++) |
| 354 | max_abs = MAX16(max_abs, ABS16(tmp[i*block+j])); |
| 355 | bins[i] = max_abs; |
| 356 | } |
| 357 | for (i=0;i<N;i++) |
| 358 | { |
| 359 | int j; |
| 360 | int conseq=0; |
| 361 | opus_val16 t1, t2, t3; |
| 362 | |
| 363 | t1 = MULT16_16_Q15(QCONST16(.15f, 15), bins[i]); |
| 364 | t2 = MULT16_16_Q15(QCONST16(.4f, 15), bins[i]); |
| 365 | t3 = MULT16_16_Q15(QCONST16(.15f, 15), bins[i]); |
| 366 | for (j=0;j<i;j++) |
| 367 | { |
| 368 | if (bins[j] < t1) |
| 369 | conseq++; |
| 370 | if (bins[j] < t2) |
| 371 | conseq++; |
| 372 | else |
| 373 | conseq = 0; |
| 374 | } |
| 375 | if (conseq>=3) |
| 376 | is_transient=1; |
| 377 | conseq = 0; |
| 378 | for (j=i+1;j<N;j++) |
| 379 | { |
| 380 | if (bins[j] < t3) |
| 381 | conseq++; |
| 382 | else |
| 383 | conseq = 0; |
| 384 | } |
| 385 | if (conseq>=7) |
| 386 | is_transient=1; |
| 387 | } |
| 388 | RESTORE_STACK; |
| 389 | #ifdef FUZZING |
| 390 | is_transient = rand()&0x1; |
| 391 | #endif |
| 392 | return is_transient; |
| 393 | } |
| 394 | |
| 395 | /** Apply window and compute the MDCT for all sub-frames and |
| 396 | all channels in a frame */ |
| 397 | static void compute_mdcts(const CELTMode *mode, int shortBlocks, celt_sig * OPUS_RESTRICT in, celt_sig * OPUS_RESTRICT out, int C, int LM) |
| 398 | { |
| 399 | if (C==1 && !shortBlocks) |
| 400 | { |
| 401 | const int overlap = OVERLAP(mode); |
| 402 | clt_mdct_forward(&mode->mdct, in, out, mode->window, overlap, mode->maxLM-LM, 1); |
| 403 | } else { |
| 404 | const int overlap = OVERLAP(mode); |
| 405 | int N = mode->shortMdctSize<<LM; |
| 406 | int B = 1; |
| 407 | int b, c; |
| 408 | if (shortBlocks) |
| 409 | { |
| 410 | N = mode->shortMdctSize; |
| 411 | B = shortBlocks; |
| 412 | } |
| 413 | c=0; do { |
| 414 | for (b=0;b<B;b++) |
| 415 | { |
| 416 | /* Interleaving the sub-frames while doing the MDCTs */ |
| 417 | clt_mdct_forward(&mode->mdct, in+c*(B*N+overlap)+b*N, &out[b+c*N*B], mode->window, overlap, shortBlocks ? mode->maxLM : mode->maxLM-LM, B); |
| 418 | } |
| 419 | } while (++c<C); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | /** Compute the IMDCT and apply window for all sub-frames and |
| 424 | all channels in a frame */ |
| 425 | static void compute_inv_mdcts(const CELTMode *mode, int shortBlocks, celt_sig *X, |
| 426 | celt_sig * OPUS_RESTRICT out_mem[], |
| 427 | celt_sig * OPUS_RESTRICT overlap_mem[], int C, int LM) |
| 428 | { |
| 429 | int c; |
| 430 | const int N = mode->shortMdctSize<<LM; |
| 431 | const int overlap = OVERLAP(mode); |
| 432 | VARDECL(opus_val32, x); |
| 433 | SAVE_STACK; |
| 434 | |
| 435 | ALLOC(x, N+overlap, opus_val32); |
| 436 | c=0; do { |
| 437 | int j; |
| 438 | int b; |
| 439 | int N2 = N; |
| 440 | int B = 1; |
| 441 | |
| 442 | if (shortBlocks) |
| 443 | { |
| 444 | N2 = mode->shortMdctSize; |
| 445 | B = shortBlocks; |
| 446 | } |
| 447 | /* Prevents problems from the imdct doing the overlap-add */ |
| 448 | OPUS_CLEAR(x, overlap); |
| 449 | |
| 450 | for (b=0;b<B;b++) |
| 451 | { |
| 452 | /* IMDCT on the interleaved the sub-frames */ |
| 453 | clt_mdct_backward(&mode->mdct, &X[b+c*N2*B], x+N2*b, mode->window, overlap, shortBlocks ? mode->maxLM : mode->maxLM-LM, B); |
| 454 | } |
| 455 | |
| 456 | for (j=0;j<overlap;j++) |
| 457 | out_mem[c][j] = x[j] + overlap_mem[c][j]; |
| 458 | for (;j<N;j++) |
| 459 | out_mem[c][j] = x[j]; |
| 460 | for (j=0;j<overlap;j++) |
| 461 | overlap_mem[c][j] = x[N+j]; |
| 462 | } while (++c<C); |
| 463 | RESTORE_STACK; |
| 464 | } |
| 465 | |
| 466 | static void deemphasis(celt_sig *in[], opus_val16 *pcm, int N, int C, int downsample, const opus_val16 *coef, celt_sig *mem) |
| 467 | { |
| 468 | int c; |
| 469 | int count=0; |
| 470 | c=0; do { |
| 471 | int j; |
| 472 | celt_sig * OPUS_RESTRICT x; |
| 473 | opus_val16 * OPUS_RESTRICT y; |
| 474 | celt_sig m = mem[c]; |
| 475 | x =in[c]; |
| 476 | y = pcm+c; |
| 477 | for (j=0;j<N;j++) |
| 478 | { |
| 479 | celt_sig tmp = *x + m; |
| 480 | m = MULT16_32_Q15(coef[0], tmp) |
| 481 | - MULT16_32_Q15(coef[1], *x); |
| 482 | tmp = SHL32(MULT16_32_Q15(coef[3], tmp), 2); |
| 483 | x++; |
| 484 | /* Technically the store could be moved outside of the if because |
| 485 | the stores we don't want will just be overwritten */ |
| 486 | if (count==0) |
| 487 | *y = SCALEOUT(SIG2WORD16(tmp)); |
| 488 | if (++count==downsample) |
| 489 | { |
| 490 | y+=C; |
| 491 | count=0; |
| 492 | } |
| 493 | } |
| 494 | mem[c] = m; |
| 495 | } while (++c<C); |
| 496 | } |
| 497 | |
| 498 | static void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N, |
| 499 | opus_val16 g0, opus_val16 g1, int tapset0, int tapset1, |
| 500 | const opus_val16 *window, int overlap) |
| 501 | { |
| 502 | int i; |
| 503 | /* printf ("%d %d %f %f\n", T0, T1, g0, g1); */ |
| 504 | opus_val16 g00, g01, g02, g10, g11, g12; |
| 505 | static const opus_val16 gains[3][3] = { |
| 506 | {QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)}, |
| 507 | {QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)}, |
| 508 | {QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}}; |
| 509 | g00 = MULT16_16_Q15(g0, gains[tapset0][0]); |
| 510 | g01 = MULT16_16_Q15(g0, gains[tapset0][1]); |
| 511 | g02 = MULT16_16_Q15(g0, gains[tapset0][2]); |
| 512 | g10 = MULT16_16_Q15(g1, gains[tapset1][0]); |
| 513 | g11 = MULT16_16_Q15(g1, gains[tapset1][1]); |
| 514 | g12 = MULT16_16_Q15(g1, gains[tapset1][2]); |
| 515 | for (i=0;i<overlap;i++) |
| 516 | { |
| 517 | opus_val16 f; |
| 518 | f = MULT16_16_Q15(window[i],window[i]); |
| 519 | y[i] = x[i] |
| 520 | + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g00),x[i-T0]) |
| 521 | + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g01),x[i-T0-1]) |
| 522 | + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g01),x[i-T0+1]) |
| 523 | + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g02),x[i-T0-2]) |
| 524 | + MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g02),x[i-T0+2]) |
| 525 | + MULT16_32_Q15(MULT16_16_Q15(f,g10),x[i-T1]) |
| 526 | + MULT16_32_Q15(MULT16_16_Q15(f,g11),x[i-T1-1]) |
| 527 | + MULT16_32_Q15(MULT16_16_Q15(f,g11),x[i-T1+1]) |
| 528 | + MULT16_32_Q15(MULT16_16_Q15(f,g12),x[i-T1-2]) |
| 529 | + MULT16_32_Q15(MULT16_16_Q15(f,g12),x[i-T1+2]); |
| 530 | |
| 531 | } |
| 532 | for (i=overlap;i<N;i++) |
| 533 | y[i] = x[i] |
| 534 | + MULT16_32_Q15(g10,x[i-T1]) |
| 535 | + MULT16_32_Q15(g11,x[i-T1-1]) |
| 536 | + MULT16_32_Q15(g11,x[i-T1+1]) |
| 537 | + MULT16_32_Q15(g12,x[i-T1-2]) |
| 538 | + MULT16_32_Q15(g12,x[i-T1+2]); |
| 539 | } |
| 540 | |
| 541 | static const signed char tf_select_table[4][8] = { |
| 542 | {0, -1, 0, -1, 0,-1, 0,-1}, |
| 543 | {0, -1, 0, -2, 1, 0, 1,-1}, |
| 544 | {0, -2, 0, -3, 2, 0, 1,-1}, |
| 545 | {0, -2, 0, -3, 3, 0, 1,-1}, |
| 546 | }; |
| 547 | |
| 548 | static opus_val32 l1_metric(const celt_norm *tmp, int N, int LM, int width) |
| 549 | { |
| 550 | int i, j; |
| 551 | static const opus_val16 sqrtM_1[4] = {Q15ONE, QCONST16(.70710678f,15), QCONST16(0.5f,15), QCONST16(0.35355339f,15)}; |
| 552 | opus_val32 L1; |
| 553 | opus_val16 bias; |
| 554 | L1=0; |
| 555 | for (i=0;i<1<<LM;i++) |
| 556 | { |
| 557 | opus_val32 L2 = 0; |
| 558 | for (j=0;j<N>>LM;j++) |
| 559 | L2 = MAC16_16(L2, tmp[(j<<LM)+i], tmp[(j<<LM)+i]); |
| 560 | L1 += celt_sqrt(L2); |
| 561 | } |
| 562 | L1 = MULT16_32_Q15(sqrtM_1[LM], L1); |
| 563 | if (width==1) |
| 564 | bias = QCONST16(.12f,15)*LM; |
| 565 | else if (width==2) |
| 566 | bias = QCONST16(.05f,15)*LM; |
| 567 | else |
| 568 | bias = QCONST16(.02f,15)*LM; |
| 569 | L1 = MAC16_32_Q15(L1, bias, L1); |
| 570 | return L1; |
| 571 | } |
| 572 | |
| 573 | static int tf_analysis(const CELTMode *m, int len, int C, int isTransient, |
| 574 | int *tf_res, int nbCompressedBytes, celt_norm *X, int N0, int LM, |
| 575 | int start, int *tf_sum) |
| 576 | { |
| 577 | int i; |
| 578 | VARDECL(int, metric); |
| 579 | int cost0; |
| 580 | int cost1; |
| 581 | VARDECL(int, path0); |
| 582 | VARDECL(int, path1); |
| 583 | VARDECL(celt_norm, tmp); |
| 584 | int lambda; |
| 585 | int tf_select=0; |
| 586 | SAVE_STACK; |
| 587 | |
| 588 | if (nbCompressedBytes<15*C || start!=0) |
| 589 | { |
| 590 | *tf_sum = 0; |
| 591 | for (i=0;i<len;i++) |
| 592 | tf_res[i] = isTransient; |
| 593 | return 0; |
| 594 | } |
| 595 | if (nbCompressedBytes<40) |
| 596 | lambda = 12; |
| 597 | else if (nbCompressedBytes<60) |
| 598 | lambda = 6; |
| 599 | else if (nbCompressedBytes<100) |
| 600 | lambda = 4; |
| 601 | else |
| 602 | lambda = 3; |
| 603 | |
| 604 | ALLOC(metric, len, int); |
| 605 | ALLOC(tmp, (m->eBands[len]-m->eBands[len-1])<<LM, celt_norm); |
| 606 | ALLOC(path0, len, int); |
| 607 | ALLOC(path1, len, int); |
| 608 | |
| 609 | *tf_sum = 0; |
| 610 | for (i=0;i<len;i++) |
| 611 | { |
| 612 | int j, k, N; |
| 613 | opus_val32 L1, best_L1; |
| 614 | int best_level=0; |
| 615 | N = (m->eBands[i+1]-m->eBands[i])<<LM; |
| 616 | for (j=0;j<N;j++) |
| 617 | tmp[j] = X[j+(m->eBands[i]<<LM)]; |
| 618 | /* Just add the right channel if we're in stereo */ |
| 619 | if (C==2) |
| 620 | for (j=0;j<N;j++) |
| 621 | tmp[j] = ADD16(SHR16(tmp[j], 1),SHR16(X[N0+j+(m->eBands[i]<<LM)], 1)); |
| 622 | L1 = l1_metric(tmp, N, isTransient ? LM : 0, N>>LM); |
| 623 | best_L1 = L1; |
| 624 | /*printf ("%f ", L1);*/ |
| 625 | for (k=0;k<LM;k++) |
| 626 | { |
| 627 | int B; |
| 628 | |
| 629 | if (isTransient) |
| 630 | B = (LM-k-1); |
| 631 | else |
| 632 | B = k+1; |
| 633 | |
| 634 | if (isTransient) |
| 635 | haar1(tmp, N>>(LM-k), 1<<(LM-k)); |
| 636 | else |
| 637 | haar1(tmp, N>>k, 1<<k); |
| 638 | |
| 639 | L1 = l1_metric(tmp, N, B, N>>LM); |
| 640 | |
| 641 | if (L1 < best_L1) |
| 642 | { |
| 643 | best_L1 = L1; |
| 644 | best_level = k+1; |
| 645 | } |
| 646 | } |
| 647 | /*printf ("%d ", isTransient ? LM-best_level : best_level);*/ |
| 648 | if (isTransient) |
| 649 | metric[i] = best_level; |
| 650 | else |
| 651 | metric[i] = -best_level; |
| 652 | *tf_sum += metric[i]; |
| 653 | } |
| 654 | /*printf("\n");*/ |
| 655 | /* NOTE: Future optimized implementations could detect extreme transients and set |
| 656 | tf_select = 1 but so far we have not found a reliable way of making this useful */ |
| 657 | tf_select = 0; |
| 658 | |
| 659 | cost0 = 0; |
| 660 | cost1 = isTransient ? 0 : lambda; |
| 661 | /* Viterbi forward pass */ |
| 662 | for (i=1;i<len;i++) |
| 663 | { |
| 664 | int curr0, curr1; |
| 665 | int from0, from1; |
| 666 | |
| 667 | from0 = cost0; |
| 668 | from1 = cost1 + lambda; |
| 669 | if (from0 < from1) |
| 670 | { |
| 671 | curr0 = from0; |
| 672 | path0[i]= 0; |
| 673 | } else { |
| 674 | curr0 = from1; |
| 675 | path0[i]= 1; |
| 676 | } |
| 677 | |
| 678 | from0 = cost0 + lambda; |
| 679 | from1 = cost1; |
| 680 | if (from0 < from1) |
| 681 | { |
| 682 | curr1 = from0; |
| 683 | path1[i]= 0; |
| 684 | } else { |
| 685 | curr1 = from1; |
| 686 | path1[i]= 1; |
| 687 | } |
| 688 | cost0 = curr0 + abs(metric[i]-tf_select_table[LM][4*isTransient+2*tf_select+0]); |
| 689 | cost1 = curr1 + abs(metric[i]-tf_select_table[LM][4*isTransient+2*tf_select+1]); |
| 690 | } |
| 691 | tf_res[len-1] = cost0 < cost1 ? 0 : 1; |
| 692 | /* Viterbi backward pass to check the decisions */ |
| 693 | for (i=len-2;i>=0;i--) |
| 694 | { |
| 695 | if (tf_res[i+1] == 1) |
| 696 | tf_res[i] = path1[i+1]; |
| 697 | else |
| 698 | tf_res[i] = path0[i+1]; |
| 699 | } |
| 700 | RESTORE_STACK; |
| 701 | #ifdef FUZZING |
| 702 | tf_select = rand()&0x1; |
| 703 | tf_res[0] = rand()&0x1; |
| 704 | for (i=1;i<len;i++) |
| 705 | tf_res[i] = tf_res[i-1] ^ ((rand()&0xF) == 0); |
| 706 | #endif |
| 707 | return tf_select; |
| 708 | } |
| 709 | |
| 710 | static void tf_encode(int start, int end, int isTransient, int *tf_res, int LM, int tf_select, ec_enc *enc) |
| 711 | { |
| 712 | int curr, i; |
| 713 | int tf_select_rsv; |
| 714 | int tf_changed; |
| 715 | int logp; |
| 716 | opus_uint32 budget; |
| 717 | opus_uint32 tell; |
| 718 | budget = enc->storage*8; |
| 719 | tell = ec_tell(enc); |
| 720 | logp = isTransient ? 2 : 4; |
| 721 | /* Reserve space to code the tf_select decision. */ |
| 722 | tf_select_rsv = LM>0 && tell+logp+1 <= budget; |
| 723 | budget -= tf_select_rsv; |
| 724 | curr = tf_changed = 0; |
| 725 | for (i=start;i<end;i++) |
| 726 | { |
| 727 | if (tell+logp<=budget) |
| 728 | { |
| 729 | ec_enc_bit_logp(enc, tf_res[i] ^ curr, logp); |
| 730 | tell = ec_tell(enc); |
| 731 | curr = tf_res[i]; |
| 732 | tf_changed |= curr; |
| 733 | } |
| 734 | else |
| 735 | tf_res[i] = curr; |
| 736 | logp = isTransient ? 4 : 5; |
| 737 | } |
| 738 | /* Only code tf_select if it would actually make a difference. */ |
| 739 | if (tf_select_rsv && |
| 740 | tf_select_table[LM][4*isTransient+0+tf_changed]!= |
| 741 | tf_select_table[LM][4*isTransient+2+tf_changed]) |
| 742 | ec_enc_bit_logp(enc, tf_select, 1); |
| 743 | else |
| 744 | tf_select = 0; |
| 745 | for (i=start;i<end;i++) |
| 746 | tf_res[i] = tf_select_table[LM][4*isTransient+2*tf_select+tf_res[i]]; |
| 747 | /*printf("%d %d ", isTransient, tf_select); for(i=0;i<end;i++)printf("%d ", tf_res[i]);printf("\n");*/ |
| 748 | } |
| 749 | |
| 750 | static void tf_decode(int start, int end, int isTransient, int *tf_res, int LM, ec_dec *dec) |
| 751 | { |
| 752 | int i, curr, tf_select; |
| 753 | int tf_select_rsv; |
| 754 | int tf_changed; |
| 755 | int logp; |
| 756 | opus_uint32 budget; |
| 757 | opus_uint32 tell; |
| 758 | |
| 759 | budget = dec->storage*8; |
| 760 | tell = ec_tell(dec); |
| 761 | logp = isTransient ? 2 : 4; |
| 762 | tf_select_rsv = LM>0 && tell+logp+1<=budget; |
| 763 | budget -= tf_select_rsv; |
| 764 | tf_changed = curr = 0; |
| 765 | for (i=start;i<end;i++) |
| 766 | { |
| 767 | if (tell+logp<=budget) |
| 768 | { |
| 769 | curr ^= ec_dec_bit_logp(dec, logp); |
| 770 | tell = ec_tell(dec); |
| 771 | tf_changed |= curr; |
| 772 | } |
| 773 | tf_res[i] = curr; |
| 774 | logp = isTransient ? 4 : 5; |
| 775 | } |
| 776 | tf_select = 0; |
| 777 | if (tf_select_rsv && |
| 778 | tf_select_table[LM][4*isTransient+0+tf_changed] != |
| 779 | tf_select_table[LM][4*isTransient+2+tf_changed]) |
| 780 | { |
| 781 | tf_select = ec_dec_bit_logp(dec, 1); |
| 782 | } |
| 783 | for (i=start;i<end;i++) |
| 784 | { |
| 785 | tf_res[i] = tf_select_table[LM][4*isTransient+2*tf_select+tf_res[i]]; |
| 786 | } |
| 787 | } |
| 788 | |
| 789 | static void init_caps(const CELTMode *m,int *cap,int LM,int C) |
| 790 | { |
| 791 | int i; |
| 792 | for (i=0;i<m->nbEBands;i++) |
| 793 | { |
| 794 | int N; |
| 795 | N=(m->eBands[i+1]-m->eBands[i])<<LM; |
| 796 | cap[i] = (m->cache.caps[m->nbEBands*(2*LM+C-1)+i]+64)*C*N>>2; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | static int alloc_trim_analysis(const CELTMode *m, const celt_norm *X, |
| 801 | const opus_val16 *bandLogE, int end, int LM, int C, int N0) |
| 802 | { |
| 803 | int i; |
| 804 | opus_val32 diff=0; |
| 805 | int c; |
| 806 | int trim_index = 5; |
| 807 | if (C==2) |
| 808 | { |
| 809 | opus_val16 sum = 0; /* Q10 */ |
| 810 | /* Compute inter-channel correlation for low frequencies */ |
| 811 | for (i=0;i<8;i++) |
| 812 | { |
| 813 | int j; |
| 814 | opus_val32 partial = 0; |
| 815 | for (j=m->eBands[i]<<LM;j<m->eBands[i+1]<<LM;j++) |
| 816 | partial = MAC16_16(partial, X[j], X[N0+j]); |
| 817 | sum = ADD16(sum, EXTRACT16(SHR32(partial, 18))); |
| 818 | } |
| 819 | sum = MULT16_16_Q15(QCONST16(1.f/8, 15), sum); |
| 820 | /*printf ("%f\n", sum);*/ |
| 821 | if (sum > QCONST16(.995f,10)) |
| 822 | trim_index-=4; |
| 823 | else if (sum > QCONST16(.92f,10)) |
| 824 | trim_index-=3; |
| 825 | else if (sum > QCONST16(.85f,10)) |
| 826 | trim_index-=2; |
| 827 | else if (sum > QCONST16(.8f,10)) |
| 828 | trim_index-=1; |
| 829 | } |
| 830 | |
| 831 | /* Estimate spectral tilt */ |
| 832 | c=0; do { |
| 833 | for (i=0;i<end-1;i++) |
| 834 | { |
| 835 | diff += bandLogE[i+c*m->nbEBands]*(opus_int32)(2+2*i-m->nbEBands); |
| 836 | } |
| 837 | } while (++c<C); |
| 838 | /* We divide by two here to avoid making the tilt larger for stereo as a |
| 839 | result of a bug in the loop above */ |
| 840 | diff /= 2*C*(end-1); |
| 841 | /*printf("%f\n", diff);*/ |
| 842 | if (diff > QCONST16(2.f, DB_SHIFT)) |
| 843 | trim_index--; |
| 844 | if (diff > QCONST16(8.f, DB_SHIFT)) |
| 845 | trim_index--; |
| 846 | if (diff < -QCONST16(4.f, DB_SHIFT)) |
| 847 | trim_index++; |
| 848 | if (diff < -QCONST16(10.f, DB_SHIFT)) |
| 849 | trim_index++; |
| 850 | |
| 851 | if (trim_index<0) |
| 852 | trim_index = 0; |
| 853 | if (trim_index>10) |
| 854 | trim_index = 10; |
| 855 | #ifdef FUZZING |
| 856 | trim_index = rand()%11; |
| 857 | #endif |
| 858 | return trim_index; |
| 859 | } |
| 860 | |
| 861 | static int stereo_analysis(const CELTMode *m, const celt_norm *X, |
| 862 | int LM, int N0) |
| 863 | { |
| 864 | int i; |
| 865 | int thetas; |
| 866 | opus_val32 sumLR = EPSILON, sumMS = EPSILON; |
| 867 | |
| 868 | /* Use the L1 norm to model the entropy of the L/R signal vs the M/S signal */ |
| 869 | for (i=0;i<13;i++) |
| 870 | { |
| 871 | int j; |
| 872 | for (j=m->eBands[i]<<LM;j<m->eBands[i+1]<<LM;j++) |
| 873 | { |
| 874 | opus_val32 L, R, M, S; |
| 875 | /* We cast to 32-bit first because of the -32768 case */ |
| 876 | L = EXTEND32(X[j]); |
| 877 | R = EXTEND32(X[N0+j]); |
| 878 | M = ADD32(L, R); |
| 879 | S = SUB32(L, R); |
| 880 | sumLR = ADD32(sumLR, ADD32(ABS32(L), ABS32(R))); |
| 881 | sumMS = ADD32(sumMS, ADD32(ABS32(M), ABS32(S))); |
| 882 | } |
| 883 | } |
| 884 | sumMS = MULT16_32_Q15(QCONST16(0.707107f, 15), sumMS); |
| 885 | thetas = 13; |
| 886 | /* We don't need thetas for lower bands with LM<=1 */ |
| 887 | if (LM<=1) |
| 888 | thetas -= 8; |
| 889 | return MULT16_32_Q15((m->eBands[13]<<(LM+1))+thetas, sumMS) |
| 890 | > MULT16_32_Q15(m->eBands[13]<<(LM+1), sumLR); |
| 891 | } |
| 892 | |
| 893 | int celt_encode_with_ec(CELTEncoder * OPUS_RESTRICT st, const opus_val16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes, ec_enc *enc) |
| 894 | { |
| 895 | int i, c, N; |
| 896 | opus_int32 bits; |
| 897 | ec_enc _enc; |
| 898 | VARDECL(celt_sig, in); |
| 899 | VARDECL(celt_sig, freq); |
| 900 | VARDECL(celt_norm, X); |
| 901 | VARDECL(celt_ener, bandE); |
| 902 | VARDECL(opus_val16, bandLogE); |
| 903 | VARDECL(int, fine_quant); |
| 904 | VARDECL(opus_val16, error); |
| 905 | VARDECL(int, pulses); |
| 906 | VARDECL(int, cap); |
| 907 | VARDECL(int, offsets); |
| 908 | VARDECL(int, fine_priority); |
| 909 | VARDECL(int, tf_res); |
| 910 | VARDECL(unsigned char, collapse_masks); |
| 911 | celt_sig *prefilter_mem; |
| 912 | opus_val16 *oldBandE, *oldLogE, *oldLogE2; |
| 913 | int shortBlocks=0; |
| 914 | int isTransient=0; |
| 915 | const int CC = st->channels; |
| 916 | const int C = st->stream_channels; |
| 917 | int LM, M; |
| 918 | int tf_select; |
| 919 | int nbFilledBytes, nbAvailableBytes; |
| 920 | int effEnd; |
| 921 | int codedBands; |
| 922 | int tf_sum; |
| 923 | int alloc_trim; |
| 924 | int pitch_index=COMBFILTER_MINPERIOD; |
| 925 | opus_val16 gain1 = 0; |
| 926 | int intensity=0; |
| 927 | int dual_stereo=0; |
| 928 | int effectiveBytes; |
| 929 | opus_val16 pf_threshold; |
| 930 | int dynalloc_logp; |
| 931 | opus_int32 vbr_rate; |
| 932 | opus_int32 total_bits; |
| 933 | opus_int32 total_boost; |
| 934 | opus_int32 balance; |
| 935 | opus_int32 tell; |
| 936 | int prefilter_tapset=0; |
| 937 | int pf_on; |
| 938 | int anti_collapse_rsv; |
| 939 | int anti_collapse_on=0; |
| 940 | int silence=0; |
| 941 | ALLOC_STACK; |
| 942 | |
| 943 | if (nbCompressedBytes<2 || pcm==NULL) |
| 944 | return OPUS_BAD_ARG; |
| 945 | |
| 946 | frame_size *= st->upsample; |
| 947 | for (LM=0;LM<=st->mode->maxLM;LM++) |
| 948 | if (st->mode->shortMdctSize<<LM==frame_size) |
| 949 | break; |
| 950 | if (LM>st->mode->maxLM) |
| 951 | return OPUS_BAD_ARG; |
| 952 | M=1<<LM; |
| 953 | N = M*st->mode->shortMdctSize; |
| 954 | |
| 955 | prefilter_mem = st->in_mem+CC*(st->overlap); |
| 956 | oldBandE = (opus_val16*)(st->in_mem+CC*(st->overlap+COMBFILTER_MAXPERIOD)); |
| 957 | oldLogE = oldBandE + CC*st->mode->nbEBands; |
| 958 | oldLogE2 = oldLogE + CC*st->mode->nbEBands; |
| 959 | |
| 960 | if (enc==NULL) |
| 961 | { |
| 962 | tell=1; |
| 963 | nbFilledBytes=0; |
| 964 | } else { |
| 965 | tell=ec_tell(enc); |
| 966 | nbFilledBytes=(tell+4)>>3; |
| 967 | } |
| 968 | |
| 969 | #ifdef CUSTOM_MODES |
| 970 | if (st->signalling && enc==NULL) |
| 971 | { |
| 972 | int tmp = (st->mode->effEBands-st->end)>>1; |
| 973 | st->end = IMAX(1, st->mode->effEBands-tmp); |
| 974 | compressed[0] = tmp<<5; |
| 975 | compressed[0] |= LM<<3; |
| 976 | compressed[0] |= (C==2)<<2; |
| 977 | /* Convert "standard mode" to Opus header */ |
| 978 | if (st->mode->Fs==48000 && st->mode->shortMdctSize==120) |
| 979 | { |
| 980 | int c0 = toOpus(compressed[0]); |
| 981 | if (c0<0) |
| 982 | return OPUS_BAD_ARG; |
| 983 | compressed[0] = c0; |
| 984 | } |
| 985 | compressed++; |
| 986 | nbCompressedBytes--; |
| 987 | } |
| 988 | #else |
| 989 | celt_assert(st->signalling==0); |
| 990 | #endif |
| 991 | |
| 992 | /* Can't produce more than 1275 output bytes */ |
| 993 | nbCompressedBytes = IMIN(nbCompressedBytes,1275); |
| 994 | nbAvailableBytes = nbCompressedBytes - nbFilledBytes; |
| 995 | |
| 996 | if (st->vbr && st->bitrate!=OPUS_BITRATE_MAX) |
| 997 | { |
| 998 | opus_int32 den=st->mode->Fs>>BITRES; |
| 999 | vbr_rate=(st->bitrate*frame_size+(den>>1))/den; |
| 1000 | #ifdef CUSTOM_MODES |
| 1001 | if (st->signalling) |
| 1002 | vbr_rate -= 8<<BITRES; |
| 1003 | #endif |
| 1004 | effectiveBytes = vbr_rate>>(3+BITRES); |
| 1005 | } else { |
| 1006 | opus_int32 tmp; |
| 1007 | vbr_rate = 0; |
| 1008 | tmp = st->bitrate*frame_size; |
| 1009 | if (tell>1) |
| 1010 | tmp += tell; |
| 1011 | if (st->bitrate!=OPUS_BITRATE_MAX) |
| 1012 | nbCompressedBytes = IMAX(2, IMIN(nbCompressedBytes, |
| 1013 | (tmp+4*st->mode->Fs)/(8*st->mode->Fs)-!!st->signalling)); |
| 1014 | effectiveBytes = nbCompressedBytes; |
| 1015 | } |
| 1016 | |
| 1017 | if (enc==NULL) |
| 1018 | { |
| 1019 | ec_enc_init(&_enc, compressed, nbCompressedBytes); |
| 1020 | enc = &_enc; |
| 1021 | } |
| 1022 | |
| 1023 | if (vbr_rate>0) |
| 1024 | { |
| 1025 | /* Computes the max bit-rate allowed in VBR mode to avoid violating the |
| 1026 | target rate and buffering. |
| 1027 | We must do this up front so that bust-prevention logic triggers |
| 1028 | correctly if we don't have enough bits. */ |
| 1029 | if (st->constrained_vbr) |
| 1030 | { |
| 1031 | opus_int32 vbr_bound; |
| 1032 | opus_int32 max_allowed; |
| 1033 | /* We could use any multiple of vbr_rate as bound (depending on the |
| 1034 | delay). |
| 1035 | This is clamped to ensure we use at least two bytes if the encoder |
| 1036 | was entirely empty, but to allow 0 in hybrid mode. */ |
| 1037 | vbr_bound = vbr_rate; |
| 1038 | max_allowed = IMIN(IMAX(tell==1?2:0, |
| 1039 | (vbr_rate+vbr_bound-st->vbr_reservoir)>>(BITRES+3)), |
| 1040 | nbAvailableBytes); |
| 1041 | if(max_allowed < nbAvailableBytes) |
| 1042 | { |
| 1043 | nbCompressedBytes = nbFilledBytes+max_allowed; |
| 1044 | nbAvailableBytes = max_allowed; |
| 1045 | ec_enc_shrink(enc, nbCompressedBytes); |
| 1046 | } |
| 1047 | } |
| 1048 | } |
| 1049 | total_bits = nbCompressedBytes*8; |
| 1050 | |
| 1051 | effEnd = st->end; |
| 1052 | if (effEnd > st->mode->effEBands) |
| 1053 | effEnd = st->mode->effEBands; |
| 1054 | |
| 1055 | ALLOC(in, CC*(N+st->overlap), celt_sig); |
| 1056 | |
| 1057 | /* Find pitch period and gain */ |
| 1058 | { |
| 1059 | VARDECL(celt_sig, _pre); |
| 1060 | celt_sig *pre[2]; |
| 1061 | SAVE_STACK; |
| 1062 | ALLOC(_pre, CC*(N+COMBFILTER_MAXPERIOD), celt_sig); |
| 1063 | |
| 1064 | pre[0] = _pre; |
| 1065 | pre[1] = _pre + (N+COMBFILTER_MAXPERIOD); |
| 1066 | |
| 1067 | silence = 1; |
| 1068 | c=0; do { |
| 1069 | int count = 0; |
| 1070 | const opus_val16 * OPUS_RESTRICT pcmp = pcm+c; |
| 1071 | celt_sig * OPUS_RESTRICT inp = in+c*(N+st->overlap)+st->overlap; |
| 1072 | |
| 1073 | for (i=0;i<N;i++) |
| 1074 | { |
| 1075 | celt_sig x, tmp; |
| 1076 | |
| 1077 | x = SCALEIN(*pcmp); |
| 1078 | #ifndef FIXED_POINT |
| 1079 | if (!(x==x)) |
| 1080 | x = 0; |
| 1081 | if (st->clip) |
| 1082 | x = MAX32(-65536.f, MIN32(65536.f,x)); |
| 1083 | #endif |
| 1084 | if (++count==st->upsample) |
| 1085 | { |
| 1086 | count=0; |
| 1087 | pcmp+=CC; |
| 1088 | } else { |
| 1089 | x = 0; |
| 1090 | } |
| 1091 | /* Apply pre-emphasis */ |
| 1092 | tmp = MULT16_16(st->mode->preemph[2], x); |
| 1093 | *inp = tmp + st->preemph_memE[c]; |
| 1094 | st->preemph_memE[c] = MULT16_32_Q15(st->mode->preemph[1], *inp) |
| 1095 | - MULT16_32_Q15(st->mode->preemph[0], tmp); |
| 1096 | silence = silence && *inp == 0; |
| 1097 | inp++; |
| 1098 | } |
| 1099 | OPUS_COPY(pre[c], prefilter_mem+c*COMBFILTER_MAXPERIOD, COMBFILTER_MAXPERIOD); |
| 1100 | OPUS_COPY(pre[c]+COMBFILTER_MAXPERIOD, in+c*(N+st->overlap)+st->overlap, N); |
| 1101 | } while (++c<CC); |
| 1102 | |
| 1103 | #ifdef FUZZING |
| 1104 | if ((rand()&0x3F)==0) |
| 1105 | silence = 1; |
| 1106 | #endif |
| 1107 | if (tell==1) |
| 1108 | ec_enc_bit_logp(enc, silence, 15); |
| 1109 | else |
| 1110 | silence=0; |
| 1111 | if (silence) |
| 1112 | { |
| 1113 | /*In VBR mode there is no need to send more than the minimum. */ |
| 1114 | if (vbr_rate>0) |
| 1115 | { |
| 1116 | effectiveBytes=nbCompressedBytes=IMIN(nbCompressedBytes, nbFilledBytes+2); |
| 1117 | total_bits=nbCompressedBytes*8; |
| 1118 | nbAvailableBytes=2; |
| 1119 | ec_enc_shrink(enc, nbCompressedBytes); |
| 1120 | } |
| 1121 | /* Pretend we've filled all the remaining bits with zeros |
| 1122 | (that's what the initialiser did anyway) */ |
| 1123 | tell = nbCompressedBytes*8; |
| 1124 | enc->nbits_total+=tell-ec_tell(enc); |
| 1125 | } |
| 1126 | if (nbAvailableBytes>12*C && st->start==0 && !silence && !st->disable_pf && st->complexity >= 5) |
| 1127 | { |
| 1128 | VARDECL(opus_val16, pitch_buf); |
| 1129 | ALLOC(pitch_buf, (COMBFILTER_MAXPERIOD+N)>>1, opus_val16); |
| 1130 | |
| 1131 | pitch_downsample(pre, pitch_buf, COMBFILTER_MAXPERIOD+N, CC); |
| 1132 | pitch_search(pitch_buf+(COMBFILTER_MAXPERIOD>>1), pitch_buf, N, |
| 1133 | COMBFILTER_MAXPERIOD-COMBFILTER_MINPERIOD, &pitch_index); |
| 1134 | pitch_index = COMBFILTER_MAXPERIOD-pitch_index; |
| 1135 | |
| 1136 | gain1 = remove_doubling(pitch_buf, COMBFILTER_MAXPERIOD, COMBFILTER_MINPERIOD, |
| 1137 | N, &pitch_index, st->prefilter_period, st->prefilter_gain); |
| 1138 | if (pitch_index > COMBFILTER_MAXPERIOD-2) |
| 1139 | pitch_index = COMBFILTER_MAXPERIOD-2; |
| 1140 | gain1 = MULT16_16_Q15(QCONST16(.7f,15),gain1); |
| 1141 | if (st->loss_rate>2) |
| 1142 | gain1 = HALF32(gain1); |
| 1143 | if (st->loss_rate>4) |
| 1144 | gain1 = HALF32(gain1); |
| 1145 | if (st->loss_rate>8) |
| 1146 | gain1 = 0; |
| 1147 | prefilter_tapset = st->tapset_decision; |
| 1148 | } else { |
| 1149 | gain1 = 0; |
| 1150 | } |
| 1151 | |
| 1152 | /* Gain threshold for enabling the prefilter/postfilter */ |
| 1153 | pf_threshold = QCONST16(.2f,15); |
| 1154 | |
| 1155 | /* Adjusting the threshold based on rate and continuity */ |
| 1156 | if (abs(pitch_index-st->prefilter_period)*10>pitch_index) |
| 1157 | pf_threshold += QCONST16(.2f,15); |
| 1158 | if (nbAvailableBytes<25) |
| 1159 | pf_threshold += QCONST16(.1f,15); |
| 1160 | if (nbAvailableBytes<35) |
| 1161 | pf_threshold += QCONST16(.1f,15); |
| 1162 | if (st->prefilter_gain > QCONST16(.4f,15)) |
| 1163 | pf_threshold -= QCONST16(.1f,15); |
| 1164 | if (st->prefilter_gain > QCONST16(.55f,15)) |
| 1165 | pf_threshold -= QCONST16(.1f,15); |
| 1166 | |
| 1167 | /* Hard threshold at 0.2 */ |
| 1168 | pf_threshold = MAX16(pf_threshold, QCONST16(.2f,15)); |
| 1169 | if (gain1<pf_threshold) |
| 1170 | { |
| 1171 | if(st->start==0 && tell+16<=total_bits) |
| 1172 | ec_enc_bit_logp(enc, 0, 1); |
| 1173 | gain1 = 0; |
| 1174 | pf_on = 0; |
| 1175 | } else { |
| 1176 | /*This block is not gated by a total bits check only because |
| 1177 | of the nbAvailableBytes check above.*/ |
| 1178 | int qg; |
| 1179 | int octave; |
| 1180 | |
| 1181 | if (ABS16(gain1-st->prefilter_gain)<QCONST16(.1f,15)) |
| 1182 | gain1=st->prefilter_gain; |
| 1183 | |
| 1184 | #ifdef FIXED_POINT |
| 1185 | qg = ((gain1+1536)>>10)/3-1; |
| 1186 | #else |
| 1187 | qg = (int)floor(.5f+gain1*32/3)-1; |
| 1188 | #endif |
| 1189 | qg = IMAX(0, IMIN(7, qg)); |
| 1190 | ec_enc_bit_logp(enc, 1, 1); |
| 1191 | pitch_index += 1; |
| 1192 | octave = EC_ILOG(pitch_index)-5; |
| 1193 | ec_enc_uint(enc, octave, 6); |
| 1194 | ec_enc_bits(enc, pitch_index-(16<<octave), 4+octave); |
| 1195 | pitch_index -= 1; |
| 1196 | ec_enc_bits(enc, qg, 3); |
| 1197 | if (ec_tell(enc)+2<=total_bits) |
| 1198 | ec_enc_icdf(enc, prefilter_tapset, tapset_icdf, 2); |
| 1199 | else |
| 1200 | prefilter_tapset = 0; |
| 1201 | gain1 = QCONST16(0.09375f,15)*(qg+1); |
| 1202 | pf_on = 1; |
| 1203 | } |
| 1204 | /*printf("%d %f\n", pitch_index, gain1);*/ |
| 1205 | |
| 1206 | c=0; do { |
| 1207 | int offset = st->mode->shortMdctSize-st->mode->overlap; |
| 1208 | st->prefilter_period=IMAX(st->prefilter_period, COMBFILTER_MINPERIOD); |
| 1209 | OPUS_COPY(in+c*(N+st->overlap), st->in_mem+c*(st->overlap), st->overlap); |
| 1210 | if (offset) |
| 1211 | comb_filter(in+c*(N+st->overlap)+st->overlap, pre[c]+COMBFILTER_MAXPERIOD, |
| 1212 | st->prefilter_period, st->prefilter_period, offset, -st->prefilter_gain, -st->prefilter_gain, |
| 1213 | st->prefilter_tapset, st->prefilter_tapset, NULL, 0); |
| 1214 | |
| 1215 | comb_filter(in+c*(N+st->overlap)+st->overlap+offset, pre[c]+COMBFILTER_MAXPERIOD+offset, |
| 1216 | st->prefilter_period, pitch_index, N-offset, -st->prefilter_gain, -gain1, |
| 1217 | st->prefilter_tapset, prefilter_tapset, st->mode->window, st->mode->overlap); |
| 1218 | OPUS_COPY(st->in_mem+c*(st->overlap), in+c*(N+st->overlap)+N, st->overlap); |
| 1219 | |
| 1220 | if (N>COMBFILTER_MAXPERIOD) |
| 1221 | { |
| 1222 | OPUS_MOVE(prefilter_mem+c*COMBFILTER_MAXPERIOD, pre[c]+N, COMBFILTER_MAXPERIOD); |
| 1223 | } else { |
| 1224 | OPUS_MOVE(prefilter_mem+c*COMBFILTER_MAXPERIOD, prefilter_mem+c*COMBFILTER_MAXPERIOD+N, COMBFILTER_MAXPERIOD-N); |
| 1225 | OPUS_MOVE(prefilter_mem+c*COMBFILTER_MAXPERIOD+COMBFILTER_MAXPERIOD-N, pre[c]+COMBFILTER_MAXPERIOD, N); |
| 1226 | } |
| 1227 | } while (++c<CC); |
| 1228 | |
| 1229 | RESTORE_STACK; |
| 1230 | } |
| 1231 | |
| 1232 | isTransient = 0; |
| 1233 | shortBlocks = 0; |
| 1234 | if (LM>0 && ec_tell(enc)+3<=total_bits) |
| 1235 | { |
| 1236 | if (st->complexity > 1) |
| 1237 | { |
| 1238 | isTransient = transient_analysis(in, N+st->overlap, CC, |
| 1239 | st->overlap); |
| 1240 | if (isTransient) |
| 1241 | shortBlocks = M; |
| 1242 | } |
| 1243 | ec_enc_bit_logp(enc, isTransient, 3); |
| 1244 | } |
| 1245 | |
| 1246 | ALLOC(freq, CC*N, celt_sig); /**< Interleaved signal MDCTs */ |
| 1247 | ALLOC(bandE,st->mode->nbEBands*CC, celt_ener); |
| 1248 | ALLOC(bandLogE,st->mode->nbEBands*CC, opus_val16); |
| 1249 | /* Compute MDCTs */ |
| 1250 | compute_mdcts(st->mode, shortBlocks, in, freq, CC, LM); |
| 1251 | |
| 1252 | if (CC==2&&C==1) |
| 1253 | { |
| 1254 | for (i=0;i<N;i++) |
| 1255 | freq[i] = ADD32(HALF32(freq[i]), HALF32(freq[N+i])); |
| 1256 | } |
| 1257 | if (st->upsample != 1) |
| 1258 | { |
| 1259 | c=0; do |
| 1260 | { |
| 1261 | int bound = N/st->upsample; |
| 1262 | for (i=0;i<bound;i++) |
| 1263 | freq[c*N+i] *= st->upsample; |
| 1264 | for (;i<N;i++) |
| 1265 | freq[c*N+i] = 0; |
| 1266 | } while (++c<C); |
| 1267 | } |
| 1268 | ALLOC(X, C*N, celt_norm); /**< Interleaved normalised MDCTs */ |
| 1269 | |
| 1270 | compute_band_energies(st->mode, freq, bandE, effEnd, C, M); |
| 1271 | |
| 1272 | amp2Log2(st->mode, effEnd, st->end, bandE, bandLogE, C); |
| 1273 | |
| 1274 | /* Band normalisation */ |
| 1275 | normalise_bands(st->mode, freq, X, bandE, effEnd, C, M); |
| 1276 | |
| 1277 | ALLOC(tf_res, st->mode->nbEBands, int); |
| 1278 | tf_select = tf_analysis(st->mode, effEnd, C, isTransient, tf_res, effectiveBytes, X, N, LM, st->start, &tf_sum); |
| 1279 | for (i=effEnd;i<st->end;i++) |
| 1280 | tf_res[i] = tf_res[effEnd-1]; |
| 1281 | |
| 1282 | ALLOC(error, C*st->mode->nbEBands, opus_val16); |
| 1283 | quant_coarse_energy(st->mode, st->start, st->end, effEnd, bandLogE, |
| 1284 | oldBandE, total_bits, error, enc, |
| 1285 | C, LM, nbAvailableBytes, st->force_intra, |
| 1286 | &st->delayedIntra, st->complexity >= 4, st->loss_rate); |
| 1287 | |
| 1288 | tf_encode(st->start, st->end, isTransient, tf_res, LM, tf_select, enc); |
| 1289 | |
| 1290 | if (ec_tell(enc)+4<=total_bits) |
| 1291 | { |
| 1292 | if (shortBlocks || st->complexity < 3 |
| 1293 | || nbAvailableBytes < 10*C || st->start!=0) |
| 1294 | { |
| 1295 | if (st->complexity == 0) |
| 1296 | st->spread_decision = SPREAD_NONE; |
| 1297 | else |
| 1298 | st->spread_decision = SPREAD_NORMAL; |
| 1299 | } else { |
| 1300 | st->spread_decision = spreading_decision(st->mode, X, |
| 1301 | &st->tonal_average, st->spread_decision, &st->hf_average, |
| 1302 | &st->tapset_decision, pf_on&&!shortBlocks, effEnd, C, M); |
| 1303 | } |
| 1304 | ec_enc_icdf(enc, st->spread_decision, spread_icdf, 5); |
| 1305 | } |
| 1306 | |
| 1307 | ALLOC(cap, st->mode->nbEBands, int); |
| 1308 | ALLOC(offsets, st->mode->nbEBands, int); |
| 1309 | |
| 1310 | init_caps(st->mode,cap,LM,C); |
| 1311 | for (i=0;i<st->mode->nbEBands;i++) |
| 1312 | offsets[i] = 0; |
| 1313 | /* Dynamic allocation code */ |
| 1314 | /* Make sure that dynamic allocation can't make us bust the budget */ |
| 1315 | if (effectiveBytes > 50 && LM>=1) |
| 1316 | { |
| 1317 | int t1, t2; |
| 1318 | if (LM <= 1) |
| 1319 | { |
| 1320 | t1 = 3; |
| 1321 | t2 = 5; |
| 1322 | } else { |
| 1323 | t1 = 2; |
| 1324 | t2 = 4; |
| 1325 | } |
| 1326 | for (i=st->start+1;i<st->end-1;i++) |
| 1327 | { |
| 1328 | opus_val32 d2; |
| 1329 | d2 = 2*bandLogE[i]-bandLogE[i-1]-bandLogE[i+1]; |
| 1330 | if (C==2) |
| 1331 | d2 = HALF32(d2 + 2*bandLogE[i+st->mode->nbEBands]- |
| 1332 | bandLogE[i-1+st->mode->nbEBands]-bandLogE[i+1+st->mode->nbEBands]); |
| 1333 | #ifdef FUZZING |
| 1334 | if((rand()&0xF)==0) |
| 1335 | { |
| 1336 | offsets[i] += 1; |
| 1337 | if((rand()&0x3)==0) |
| 1338 | offsets[i] += 1+(rand()&0x3); |
| 1339 | } |
| 1340 | #else |
| 1341 | if (d2 > SHL16(t1,DB_SHIFT)) |
| 1342 | offsets[i] += 1; |
| 1343 | if (d2 > SHL16(t2,DB_SHIFT)) |
| 1344 | offsets[i] += 1; |
| 1345 | #endif |
| 1346 | } |
| 1347 | } |
| 1348 | dynalloc_logp = 6; |
| 1349 | total_bits<<=BITRES; |
| 1350 | total_boost = 0; |
| 1351 | tell = ec_tell_frac(enc); |
| 1352 | for (i=st->start;i<st->end;i++) |
| 1353 | { |
| 1354 | int width, quanta; |
| 1355 | int dynalloc_loop_logp; |
| 1356 | int boost; |
| 1357 | int j; |
| 1358 | width = C*(st->mode->eBands[i+1]-st->mode->eBands[i])<<LM; |
| 1359 | /* quanta is 6 bits, but no more than 1 bit/sample |
| 1360 | and no less than 1/8 bit/sample */ |
| 1361 | quanta = IMIN(width<<BITRES, IMAX(6<<BITRES, width)); |
| 1362 | dynalloc_loop_logp = dynalloc_logp; |
| 1363 | boost = 0; |
| 1364 | for (j = 0; tell+(dynalloc_loop_logp<<BITRES) < total_bits-total_boost |
| 1365 | && boost < cap[i]; j++) |
| 1366 | { |
| 1367 | int flag; |
| 1368 | flag = j<offsets[i]; |
| 1369 | ec_enc_bit_logp(enc, flag, dynalloc_loop_logp); |
| 1370 | tell = ec_tell_frac(enc); |
| 1371 | if (!flag) |
| 1372 | break; |
| 1373 | boost += quanta; |
| 1374 | total_boost += quanta; |
| 1375 | dynalloc_loop_logp = 1; |
| 1376 | } |
| 1377 | /* Making dynalloc more likely */ |
| 1378 | if (j) |
| 1379 | dynalloc_logp = IMAX(2, dynalloc_logp-1); |
| 1380 | offsets[i] = boost; |
| 1381 | } |
| 1382 | alloc_trim = 5; |
| 1383 | if (tell+(6<<BITRES) <= total_bits - total_boost) |
| 1384 | { |
| 1385 | alloc_trim = alloc_trim_analysis(st->mode, X, bandLogE, |
| 1386 | st->end, LM, C, N); |
| 1387 | ec_enc_icdf(enc, alloc_trim, trim_icdf, 7); |
| 1388 | tell = ec_tell_frac(enc); |
| 1389 | } |
| 1390 | |
| 1391 | /* Variable bitrate */ |
| 1392 | if (vbr_rate>0) |
| 1393 | { |
| 1394 | opus_val16 alpha; |
| 1395 | opus_int32 delta; |
| 1396 | /* The target rate in 8th bits per frame */ |
| 1397 | opus_int32 target; |
| 1398 | opus_int32 min_allowed; |
| 1399 | int lm_diff = st->mode->maxLM - LM; |
| 1400 | |
| 1401 | /* Don't attempt to use more than 510 kb/s, even for frames smaller than 20 ms. |
| 1402 | The CELT allocator will just not be able to use more than that anyway. */ |
| 1403 | nbCompressedBytes = IMIN(nbCompressedBytes,1275>>(3-LM)); |
| 1404 | target = vbr_rate + (st->vbr_offset>>lm_diff) - ((40*C+20)<<BITRES); |
| 1405 | |
| 1406 | /* Shortblocks get a large boost in bitrate, but since they |
| 1407 | are uncommon long blocks are not greatly affected */ |
| 1408 | if (shortBlocks || tf_sum < -2*(st->end-st->start)) |
| 1409 | target = 7*target/4; |
| 1410 | else if (tf_sum < -(st->end-st->start)) |
| 1411 | target = 3*target/2; |
| 1412 | else if (M > 1) |
| 1413 | target-=(target+14)/28; |
| 1414 | |
| 1415 | /* The current offset is removed from the target and the space used |
| 1416 | so far is added*/ |
| 1417 | target=target+tell; |
| 1418 | |
| 1419 | /* In VBR mode the frame size must not be reduced so much that it would |
| 1420 | result in the encoder running out of bits. |
| 1421 | The margin of 2 bytes ensures that none of the bust-prevention logic |
| 1422 | in the decoder will have triggered so far. */ |
| 1423 | min_allowed = ((tell+total_boost+(1<<(BITRES+3))-1)>>(BITRES+3)) + 2 - nbFilledBytes; |
| 1424 | |
| 1425 | nbAvailableBytes = (target+(1<<(BITRES+2)))>>(BITRES+3); |
| 1426 | nbAvailableBytes = IMAX(min_allowed,nbAvailableBytes); |
| 1427 | nbAvailableBytes = IMIN(nbCompressedBytes,nbAvailableBytes+nbFilledBytes) - nbFilledBytes; |
| 1428 | |
| 1429 | /* By how much did we "miss" the target on that frame */ |
| 1430 | delta = target - vbr_rate; |
| 1431 | |
| 1432 | target=nbAvailableBytes<<(BITRES+3); |
| 1433 | |
| 1434 | /*If the frame is silent we don't adjust our drift, otherwise |
| 1435 | the encoder will shoot to very high rates after hitting a |
| 1436 | span of silence, but we do allow the bitres to refill. |
| 1437 | This means that we'll undershoot our target in CVBR/VBR modes |
| 1438 | on files with lots of silence. */ |
| 1439 | if(silence) |
| 1440 | { |
| 1441 | nbAvailableBytes = 2; |
| 1442 | target = 2*8<<BITRES; |
| 1443 | delta = 0; |
| 1444 | } |
| 1445 | |
| 1446 | if (st->vbr_count < 970) |
| 1447 | { |
| 1448 | st->vbr_count++; |
| 1449 | alpha = celt_rcp(SHL32(EXTEND32(st->vbr_count+20),16)); |
| 1450 | } else |
| 1451 | alpha = QCONST16(.001f,15); |
| 1452 | /* How many bits have we used in excess of what we're allowed */ |
| 1453 | if (st->constrained_vbr) |
| 1454 | st->vbr_reservoir += target - vbr_rate; |
| 1455 | /*printf ("%d\n", st->vbr_reservoir);*/ |
| 1456 | |
| 1457 | /* Compute the offset we need to apply in order to reach the target */ |
| 1458 | st->vbr_drift += (opus_int32)MULT16_32_Q15(alpha,(delta*(1<<lm_diff))-st->vbr_offset-st->vbr_drift); |
| 1459 | st->vbr_offset = -st->vbr_drift; |
| 1460 | /*printf ("%d\n", st->vbr_drift);*/ |
| 1461 | |
| 1462 | if (st->constrained_vbr && st->vbr_reservoir < 0) |
| 1463 | { |
| 1464 | /* We're under the min value -- increase rate */ |
| 1465 | int adjust = (-st->vbr_reservoir)/(8<<BITRES); |
| 1466 | /* Unless we're just coding silence */ |
| 1467 | nbAvailableBytes += silence?0:adjust; |
| 1468 | st->vbr_reservoir = 0; |
| 1469 | /*printf ("+%d\n", adjust);*/ |
| 1470 | } |
| 1471 | nbCompressedBytes = IMIN(nbCompressedBytes,nbAvailableBytes+nbFilledBytes); |
| 1472 | /* This moves the raw bits to take into account the new compressed size */ |
| 1473 | ec_enc_shrink(enc, nbCompressedBytes); |
| 1474 | } |
| 1475 | if (C==2) |
| 1476 | { |
| 1477 | int effectiveRate; |
| 1478 | |
| 1479 | /* Always use MS for 2.5 ms frames until we can do a better analysis */ |
| 1480 | if (LM!=0) |
| 1481 | dual_stereo = stereo_analysis(st->mode, X, LM, N); |
| 1482 | |
| 1483 | /* Account for coarse energy */ |
| 1484 | effectiveRate = (8*effectiveBytes - 80)>>LM; |
| 1485 | |
| 1486 | /* effectiveRate in kb/s */ |
| 1487 | effectiveRate = 2*effectiveRate/5; |
| 1488 | if (effectiveRate<35) |
| 1489 | intensity = 8; |
| 1490 | else if (effectiveRate<50) |
| 1491 | intensity = 12; |
| 1492 | else if (effectiveRate<68) |
| 1493 | intensity = 16; |
| 1494 | else if (effectiveRate<84) |
| 1495 | intensity = 18; |
| 1496 | else if (effectiveRate<102) |
| 1497 | intensity = 19; |
| 1498 | else if (effectiveRate<130) |
| 1499 | intensity = 20; |
| 1500 | else |
| 1501 | intensity = 100; |
| 1502 | intensity = IMIN(st->end,IMAX(st->start, intensity)); |
| 1503 | } |
| 1504 | |
| 1505 | /* Bit allocation */ |
| 1506 | ALLOC(fine_quant, st->mode->nbEBands, int); |
| 1507 | ALLOC(pulses, st->mode->nbEBands, int); |
| 1508 | ALLOC(fine_priority, st->mode->nbEBands, int); |
| 1509 | |
| 1510 | /* bits = packet size - where we are - safety*/ |
| 1511 | bits = (((opus_int32)nbCompressedBytes*8)<<BITRES) - ec_tell_frac(enc) - 1; |
| 1512 | anti_collapse_rsv = isTransient&&LM>=2&&bits>=((LM+2)<<BITRES) ? (1<<BITRES) : 0; |
| 1513 | bits -= anti_collapse_rsv; |
| 1514 | codedBands = compute_allocation(st->mode, st->start, st->end, offsets, cap, |
| 1515 | alloc_trim, &intensity, &dual_stereo, bits, &balance, pulses, |
| 1516 | fine_quant, fine_priority, C, LM, enc, 1, st->lastCodedBands); |
| 1517 | st->lastCodedBands = codedBands; |
| 1518 | |
| 1519 | quant_fine_energy(st->mode, st->start, st->end, oldBandE, error, fine_quant, enc, C); |
| 1520 | |
| 1521 | #ifdef MEASURE_NORM_MSE |
| 1522 | float X0[3000]; |
| 1523 | float bandE0[60]; |
| 1524 | c=0; do |
| 1525 | for (i=0;i<N;i++) |
| 1526 | X0[i+c*N] = X[i+c*N]; |
| 1527 | while (++c<C); |
| 1528 | for (i=0;i<C*st->mode->nbEBands;i++) |
| 1529 | bandE0[i] = bandE[i]; |
| 1530 | #endif |
| 1531 | |
| 1532 | /* Residual quantisation */ |
| 1533 | ALLOC(collapse_masks, C*st->mode->nbEBands, unsigned char); |
| 1534 | quant_all_bands(1, st->mode, st->start, st->end, X, C==2 ? X+N : NULL, collapse_masks, |
| 1535 | bandE, pulses, shortBlocks, st->spread_decision, dual_stereo, intensity, tf_res, |
| 1536 | nbCompressedBytes*(8<<BITRES)-anti_collapse_rsv, balance, enc, LM, codedBands, &st->rng); |
| 1537 | |
| 1538 | if (anti_collapse_rsv > 0) |
| 1539 | { |
| 1540 | anti_collapse_on = st->consec_transient<2; |
| 1541 | #ifdef FUZZING |
| 1542 | anti_collapse_on = rand()&0x1; |
| 1543 | #endif |
| 1544 | ec_enc_bits(enc, anti_collapse_on, 1); |
| 1545 | } |
| 1546 | quant_energy_finalise(st->mode, st->start, st->end, oldBandE, error, fine_quant, fine_priority, nbCompressedBytes*8-ec_tell(enc), enc, C); |
| 1547 | |
| 1548 | if (silence) |
| 1549 | { |
| 1550 | for (i=0;i<C*st->mode->nbEBands;i++) |
| 1551 | oldBandE[i] = -QCONST16(28.f,DB_SHIFT); |
| 1552 | } |
| 1553 | |
| 1554 | #ifdef RESYNTH |
| 1555 | /* Re-synthesis of the coded audio if required */ |
| 1556 | { |
| 1557 | celt_sig *out_mem[2]; |
| 1558 | celt_sig *overlap_mem[2]; |
| 1559 | |
| 1560 | log2Amp(st->mode, st->start, st->end, bandE, oldBandE, C); |
| 1561 | if (silence) |
| 1562 | { |
| 1563 | for (i=0;i<C*st->mode->nbEBands;i++) |
| 1564 | bandE[i] = 0; |
| 1565 | } |
| 1566 | |
| 1567 | #ifdef MEASURE_NORM_MSE |
| 1568 | measure_norm_mse(st->mode, X, X0, bandE, bandE0, M, N, C); |
| 1569 | #endif |
| 1570 | if (anti_collapse_on) |
| 1571 | { |
| 1572 | anti_collapse(st->mode, X, collapse_masks, LM, C, N, |
| 1573 | st->start, st->end, oldBandE, oldLogE, oldLogE2, pulses, st->rng); |
| 1574 | } |
| 1575 | |
| 1576 | /* Synthesis */ |
| 1577 | denormalise_bands(st->mode, X, freq, bandE, effEnd, C, M); |
| 1578 | |
| 1579 | OPUS_MOVE(st->syn_mem[0], st->syn_mem[0]+N, MAX_PERIOD); |
| 1580 | if (CC==2) |
| 1581 | OPUS_MOVE(st->syn_mem[1], st->syn_mem[1]+N, MAX_PERIOD); |
| 1582 | |
| 1583 | c=0; do |
| 1584 | for (i=0;i<M*st->mode->eBands[st->start];i++) |
| 1585 | freq[c*N+i] = 0; |
| 1586 | while (++c<C); |
| 1587 | c=0; do |
| 1588 | for (i=M*st->mode->eBands[st->end];i<N;i++) |
| 1589 | freq[c*N+i] = 0; |
| 1590 | while (++c<C); |
| 1591 | |
| 1592 | if (CC==2&&C==1) |
| 1593 | { |
| 1594 | for (i=0;i<N;i++) |
| 1595 | freq[N+i] = freq[i]; |
| 1596 | } |
| 1597 | |
| 1598 | out_mem[0] = st->syn_mem[0]+MAX_PERIOD; |
| 1599 | if (CC==2) |
| 1600 | out_mem[1] = st->syn_mem[1]+MAX_PERIOD; |
| 1601 | |
| 1602 | overlap_mem[0] = (celt_sig*)(oldLogE2 + CC*st->mode->nbEBands); |
| 1603 | if (CC==2) |
| 1604 | overlap_mem[1] = overlap_mem[0] + st->overlap; |
| 1605 | |
| 1606 | compute_inv_mdcts(st->mode, shortBlocks, freq, out_mem, overlap_mem, CC, LM); |
| 1607 | |
| 1608 | c=0; do { |
| 1609 | st->prefilter_period=IMAX(st->prefilter_period, COMBFILTER_MINPERIOD); |
| 1610 | st->prefilter_period_old=IMAX(st->prefilter_period_old, COMBFILTER_MINPERIOD); |
| 1611 | comb_filter(out_mem[c], out_mem[c], st->prefilter_period_old, st->prefilter_period, st->mode->shortMdctSize, |
| 1612 | st->prefilter_gain_old, st->prefilter_gain, st->prefilter_tapset_old, st->prefilter_tapset, |
| 1613 | st->mode->window, st->overlap); |
| 1614 | if (LM!=0) |
| 1615 | comb_filter(out_mem[c]+st->mode->shortMdctSize, out_mem[c]+st->mode->shortMdctSize, st->prefilter_period, pitch_index, N-st->mode->shortMdctSize, |
| 1616 | st->prefilter_gain, gain1, st->prefilter_tapset, prefilter_tapset, |
| 1617 | st->mode->window, st->mode->overlap); |
| 1618 | } while (++c<CC); |
| 1619 | |
| 1620 | deemphasis(out_mem, (opus_val16*)pcm, N, CC, st->upsample, st->mode->preemph, st->preemph_memD); |
| 1621 | st->prefilter_period_old = st->prefilter_period; |
| 1622 | st->prefilter_gain_old = st->prefilter_gain; |
| 1623 | st->prefilter_tapset_old = st->prefilter_tapset; |
| 1624 | } |
| 1625 | #endif |
| 1626 | |
| 1627 | st->prefilter_period = pitch_index; |
| 1628 | st->prefilter_gain = gain1; |
| 1629 | st->prefilter_tapset = prefilter_tapset; |
| 1630 | #ifdef RESYNTH |
| 1631 | if (LM!=0) |
| 1632 | { |
| 1633 | st->prefilter_period_old = st->prefilter_period; |
| 1634 | st->prefilter_gain_old = st->prefilter_gain; |
| 1635 | st->prefilter_tapset_old = st->prefilter_tapset; |
| 1636 | } |
| 1637 | #endif |
| 1638 | |
| 1639 | if (CC==2&&C==1) { |
| 1640 | for (i=0;i<st->mode->nbEBands;i++) |
| 1641 | oldBandE[st->mode->nbEBands+i]=oldBandE[i]; |
| 1642 | } |
| 1643 | |
| 1644 | if (!isTransient) |
| 1645 | { |
| 1646 | for (i=0;i<CC*st->mode->nbEBands;i++) |
| 1647 | oldLogE2[i] = oldLogE[i]; |
| 1648 | for (i=0;i<CC*st->mode->nbEBands;i++) |
| 1649 | oldLogE[i] = oldBandE[i]; |
| 1650 | } else { |
| 1651 | for (i=0;i<CC*st->mode->nbEBands;i++) |
| 1652 | oldLogE[i] = MIN16(oldLogE[i], oldBandE[i]); |
| 1653 | } |
| 1654 | /* In case start or end were to change */ |
| 1655 | c=0; do |
| 1656 | { |
| 1657 | for (i=0;i<st->start;i++) |
| 1658 | { |
| 1659 | oldBandE[c*st->mode->nbEBands+i]=0; |
| 1660 | oldLogE[c*st->mode->nbEBands+i]=oldLogE2[c*st->mode->nbEBands+i]=-QCONST16(28.f,DB_SHIFT); |
| 1661 | } |
| 1662 | for (i=st->end;i<st->mode->nbEBands;i++) |
| 1663 | { |
| 1664 | oldBandE[c*st->mode->nbEBands+i]=0; |
| 1665 | oldLogE[c*st->mode->nbEBands+i]=oldLogE2[c*st->mode->nbEBands+i]=-QCONST16(28.f,DB_SHIFT); |
| 1666 | } |
| 1667 | } while (++c<CC); |
| 1668 | |
| 1669 | if (isTransient) |
| 1670 | st->consec_transient++; |
| 1671 | else |
| 1672 | st->consec_transient=0; |
| 1673 | st->rng = enc->rng; |
| 1674 | |
| 1675 | /* If there's any room left (can only happen for very high rates), |
| 1676 | it's already filled with zeros */ |
| 1677 | ec_enc_done(enc); |
| 1678 | |
| 1679 | #ifdef CUSTOM_MODES |
| 1680 | if (st->signalling) |
| 1681 | nbCompressedBytes++; |
| 1682 | #endif |
| 1683 | |
| 1684 | RESTORE_STACK; |
| 1685 | if (ec_get_error(enc)) |
| 1686 | return OPUS_INTERNAL_ERROR; |
| 1687 | else |
| 1688 | return nbCompressedBytes; |
| 1689 | } |
| 1690 | |
| 1691 | |
| 1692 | #ifdef CUSTOM_MODES |
| 1693 | |
| 1694 | #ifdef FIXED_POINT |
| 1695 | int opus_custom_encode(CELTEncoder * OPUS_RESTRICT st, const opus_int16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes) |
| 1696 | { |
| 1697 | return celt_encode_with_ec(st, pcm, frame_size, compressed, nbCompressedBytes, NULL); |
| 1698 | } |
| 1699 | |
| 1700 | #ifndef DISABLE_FLOAT_API |
| 1701 | int opus_custom_encode_float(CELTEncoder * OPUS_RESTRICT st, const float * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes) |
| 1702 | { |
| 1703 | int j, ret, C, N; |
| 1704 | VARDECL(opus_int16, in); |
| 1705 | ALLOC_STACK; |
| 1706 | |
| 1707 | if (pcm==NULL) |
| 1708 | return OPUS_BAD_ARG; |
| 1709 | |
| 1710 | C = st->channels; |
| 1711 | N = frame_size; |
| 1712 | ALLOC(in, C*N, opus_int16); |
| 1713 | |
| 1714 | for (j=0;j<C*N;j++) |
| 1715 | in[j] = FLOAT2INT16(pcm[j]); |
| 1716 | |
| 1717 | ret=celt_encode_with_ec(st,in,frame_size,compressed,nbCompressedBytes, NULL); |
| 1718 | #ifdef RESYNTH |
| 1719 | for (j=0;j<C*N;j++) |
| 1720 | ((float*)pcm)[j]=in[j]*(1.f/32768.f); |
| 1721 | #endif |
| 1722 | RESTORE_STACK; |
| 1723 | return ret; |
| 1724 | } |
| 1725 | #endif /* DISABLE_FLOAT_API */ |
| 1726 | #else |
| 1727 | |
| 1728 | int opus_custom_encode(CELTEncoder * OPUS_RESTRICT st, const opus_int16 * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes) |
| 1729 | { |
| 1730 | int j, ret, C, N; |
| 1731 | VARDECL(celt_sig, in); |
| 1732 | ALLOC_STACK; |
| 1733 | |
| 1734 | if (pcm==NULL) |
| 1735 | return OPUS_BAD_ARG; |
| 1736 | |
| 1737 | C=st->channels; |
| 1738 | N=frame_size; |
| 1739 | ALLOC(in, C*N, celt_sig); |
| 1740 | for (j=0;j<C*N;j++) { |
| 1741 | in[j] = SCALEOUT(pcm[j]); |
| 1742 | } |
| 1743 | |
| 1744 | ret = celt_encode_with_ec(st,in,frame_size,compressed,nbCompressedBytes, NULL); |
| 1745 | #ifdef RESYNTH |
| 1746 | for (j=0;j<C*N;j++) |
| 1747 | ((opus_int16*)pcm)[j] = FLOAT2INT16(in[j]); |
| 1748 | #endif |
| 1749 | RESTORE_STACK; |
| 1750 | return ret; |
| 1751 | } |
| 1752 | |
| 1753 | int opus_custom_encode_float(CELTEncoder * OPUS_RESTRICT st, const float * pcm, int frame_size, unsigned char *compressed, int nbCompressedBytes) |
| 1754 | { |
| 1755 | return celt_encode_with_ec(st, pcm, frame_size, compressed, nbCompressedBytes, NULL); |
| 1756 | } |
| 1757 | |
| 1758 | #endif |
| 1759 | |
| 1760 | #endif /* CUSTOM_MODES */ |
| 1761 | |
| 1762 | int opus_custom_encoder_ctl(CELTEncoder * OPUS_RESTRICT st, int request, ...) |
| 1763 | { |
| 1764 | va_list ap; |
| 1765 | |
| 1766 | va_start(ap, request); |
| 1767 | switch (request) |
| 1768 | { |
| 1769 | case OPUS_SET_COMPLEXITY_REQUEST: |
| 1770 | { |
| 1771 | int value = va_arg(ap, opus_int32); |
| 1772 | if (value<0 || value>10) |
| 1773 | goto bad_arg; |
| 1774 | st->complexity = value; |
| 1775 | } |
| 1776 | break; |
| 1777 | case CELT_SET_START_BAND_REQUEST: |
| 1778 | { |
| 1779 | opus_int32 value = va_arg(ap, opus_int32); |
| 1780 | if (value<0 || value>=st->mode->nbEBands) |
| 1781 | goto bad_arg; |
| 1782 | st->start = value; |
| 1783 | } |
| 1784 | break; |
| 1785 | case CELT_SET_END_BAND_REQUEST: |
| 1786 | { |
| 1787 | opus_int32 value = va_arg(ap, opus_int32); |
| 1788 | if (value<1 || value>st->mode->nbEBands) |
| 1789 | goto bad_arg; |
| 1790 | st->end = value; |
| 1791 | } |
| 1792 | break; |
| 1793 | case CELT_SET_PREDICTION_REQUEST: |
| 1794 | { |
| 1795 | int value = va_arg(ap, opus_int32); |
| 1796 | if (value<0 || value>2) |
| 1797 | goto bad_arg; |
| 1798 | st->disable_pf = value<=1; |
| 1799 | st->force_intra = value==0; |
| 1800 | } |
| 1801 | break; |
| 1802 | case OPUS_SET_PACKET_LOSS_PERC_REQUEST: |
| 1803 | { |
| 1804 | int value = va_arg(ap, opus_int32); |
| 1805 | if (value<0 || value>100) |
| 1806 | goto bad_arg; |
| 1807 | st->loss_rate = value; |
| 1808 | } |
| 1809 | break; |
| 1810 | case OPUS_SET_VBR_CONSTRAINT_REQUEST: |
| 1811 | { |
| 1812 | opus_int32 value = va_arg(ap, opus_int32); |
| 1813 | st->constrained_vbr = value; |
| 1814 | } |
| 1815 | break; |
| 1816 | case OPUS_SET_VBR_REQUEST: |
| 1817 | { |
| 1818 | opus_int32 value = va_arg(ap, opus_int32); |
| 1819 | st->vbr = value; |
| 1820 | } |
| 1821 | break; |
| 1822 | case OPUS_SET_BITRATE_REQUEST: |
| 1823 | { |
| 1824 | opus_int32 value = va_arg(ap, opus_int32); |
| 1825 | if (value<=500 && value!=OPUS_BITRATE_MAX) |
| 1826 | goto bad_arg; |
| 1827 | value = IMIN(value, 260000*st->channels); |
| 1828 | st->bitrate = value; |
| 1829 | } |
| 1830 | break; |
| 1831 | case CELT_SET_CHANNELS_REQUEST: |
| 1832 | { |
| 1833 | opus_int32 value = va_arg(ap, opus_int32); |
| 1834 | if (value<1 || value>2) |
| 1835 | goto bad_arg; |
| 1836 | st->stream_channels = value; |
| 1837 | } |
| 1838 | break; |
| 1839 | case OPUS_SET_LSB_DEPTH_REQUEST: |
| 1840 | { |
| 1841 | opus_int32 value = va_arg(ap, opus_int32); |
| 1842 | if (value<8 || value>24) |
| 1843 | goto bad_arg; |
| 1844 | st->lsb_depth=value; |
| 1845 | } |
| 1846 | break; |
| 1847 | case OPUS_GET_LSB_DEPTH_REQUEST: |
| 1848 | { |
| 1849 | opus_int32 *value = va_arg(ap, opus_int32*); |
| 1850 | *value=st->lsb_depth; |
| 1851 | } |
| 1852 | break; |
| 1853 | case OPUS_RESET_STATE: |
| 1854 | { |
| 1855 | int i; |
| 1856 | opus_val16 *oldBandE, *oldLogE, *oldLogE2; |
| 1857 | oldBandE = (opus_val16*)(st->in_mem+st->channels*(st->overlap+COMBFILTER_MAXPERIOD)); |
| 1858 | oldLogE = oldBandE + st->channels*st->mode->nbEBands; |
| 1859 | oldLogE2 = oldLogE + st->channels*st->mode->nbEBands; |
| 1860 | OPUS_CLEAR((char*)&st->ENCODER_RESET_START, |
| 1861 | opus_custom_encoder_get_size(st->mode, st->channels)- |
| 1862 | ((char*)&st->ENCODER_RESET_START - (char*)st)); |
| 1863 | for (i=0;i<st->channels*st->mode->nbEBands;i++) |
| 1864 | oldLogE[i]=oldLogE2[i]=-QCONST16(28.f,DB_SHIFT); |
| 1865 | st->vbr_offset = 0; |
| 1866 | st->delayedIntra = 1; |
| 1867 | st->spread_decision = SPREAD_NORMAL; |
| 1868 | st->tonal_average = 256; |
| 1869 | st->hf_average = 0; |
| 1870 | st->tapset_decision = 0; |
| 1871 | } |
| 1872 | break; |
| 1873 | #ifdef CUSTOM_MODES |
| 1874 | case CELT_SET_INPUT_CLIPPING_REQUEST: |
| 1875 | { |
| 1876 | opus_int32 value = va_arg(ap, opus_int32); |
| 1877 | st->clip = value; |
| 1878 | } |
| 1879 | break; |
| 1880 | #endif |
| 1881 | case CELT_SET_SIGNALLING_REQUEST: |
| 1882 | { |
| 1883 | opus_int32 value = va_arg(ap, opus_int32); |
| 1884 | st->signalling = value; |
| 1885 | } |
| 1886 | break; |
| 1887 | case CELT_GET_MODE_REQUEST: |
| 1888 | { |
| 1889 | const CELTMode ** value = va_arg(ap, const CELTMode**); |
| 1890 | if (value==0) |
| 1891 | goto bad_arg; |
| 1892 | *value=st->mode; |
| 1893 | } |
| 1894 | break; |
| 1895 | case OPUS_GET_FINAL_RANGE_REQUEST: |
| 1896 | { |
| 1897 | opus_uint32 * value = va_arg(ap, opus_uint32 *); |
| 1898 | if (value==0) |
| 1899 | goto bad_arg; |
| 1900 | *value=st->rng; |
| 1901 | } |
| 1902 | break; |
| 1903 | default: |
| 1904 | goto bad_request; |
| 1905 | } |
| 1906 | va_end(ap); |
| 1907 | return OPUS_OK; |
| 1908 | bad_arg: |
| 1909 | va_end(ap); |
| 1910 | return OPUS_BAD_ARG; |
| 1911 | bad_request: |
| 1912 | va_end(ap); |
| 1913 | return OPUS_UNIMPLEMENTED; |
| 1914 | } |
| 1915 | |
| 1916 | /**********************************************************************/ |
| 1917 | /* */ |
| 1918 | /* DECODER */ |
| 1919 | /* */ |
| 1920 | /**********************************************************************/ |
| 1921 | #define DECODE_BUFFER_SIZE 2048 |
| 1922 | |
| 1923 | /** Decoder state |
| 1924 | @brief Decoder state |
| 1925 | */ |
| 1926 | struct OpusCustomDecoder { |
| 1927 | const OpusCustomMode *mode; |
| 1928 | int overlap; |
| 1929 | int channels; |
| 1930 | int stream_channels; |
| 1931 | |
| 1932 | int downsample; |
| 1933 | int start, end; |
| 1934 | int signalling; |
| 1935 | |
| 1936 | /* Everything beyond this point gets cleared on a reset */ |
| 1937 | #define DECODER_RESET_START rng |
| 1938 | |
| 1939 | opus_uint32 rng; |
| 1940 | int error; |
| 1941 | int last_pitch_index; |
| 1942 | int loss_count; |
| 1943 | int postfilter_period; |
| 1944 | int postfilter_period_old; |
| 1945 | opus_val16 postfilter_gain; |
| 1946 | opus_val16 postfilter_gain_old; |
| 1947 | int postfilter_tapset; |
| 1948 | int postfilter_tapset_old; |
| 1949 | |
| 1950 | celt_sig preemph_memD[2]; |
| 1951 | |
| 1952 | celt_sig _decode_mem[1]; /* Size = channels*(DECODE_BUFFER_SIZE+mode->overlap) */ |
| 1953 | /* opus_val16 lpc[], Size = channels*LPC_ORDER */ |
| 1954 | /* opus_val16 oldEBands[], Size = 2*mode->nbEBands */ |
| 1955 | /* opus_val16 oldLogE[], Size = 2*mode->nbEBands */ |
| 1956 | /* opus_val16 oldLogE2[], Size = 2*mode->nbEBands */ |
| 1957 | /* opus_val16 backgroundLogE[], Size = 2*mode->nbEBands */ |
| 1958 | }; |
| 1959 | |
| 1960 | int celt_decoder_get_size(int channels) |
| 1961 | { |
| 1962 | const CELTMode *mode = opus_custom_mode_create(48000, 960, NULL); |
| 1963 | return opus_custom_decoder_get_size(mode, channels); |
| 1964 | } |
| 1965 | |
| 1966 | OPUS_CUSTOM_NOSTATIC int opus_custom_decoder_get_size(const CELTMode *mode, int channels) |
| 1967 | { |
| 1968 | int size = sizeof(struct CELTDecoder) |
| 1969 | + (channels*(DECODE_BUFFER_SIZE+mode->overlap)-1)*sizeof(celt_sig) |
| 1970 | + channels*LPC_ORDER*sizeof(opus_val16) |
| 1971 | + 4*2*mode->nbEBands*sizeof(opus_val16); |
| 1972 | return size; |
| 1973 | } |
| 1974 | |
| 1975 | #ifdef CUSTOM_MODES |
| 1976 | CELTDecoder *opus_custom_decoder_create(const CELTMode *mode, int channels, int *error) |
| 1977 | { |
| 1978 | int ret; |
| 1979 | CELTDecoder *st = (CELTDecoder *)opus_alloc(opus_custom_decoder_get_size(mode, channels)); |
| 1980 | ret = opus_custom_decoder_init(st, mode, channels); |
| 1981 | if (ret != OPUS_OK) |
| 1982 | { |
| 1983 | opus_custom_decoder_destroy(st); |
| 1984 | st = NULL; |
| 1985 | } |
| 1986 | if (error) |
| 1987 | *error = ret; |
| 1988 | return st; |
| 1989 | } |
| 1990 | #endif /* CUSTOM_MODES */ |
| 1991 | |
| 1992 | int celt_decoder_init(CELTDecoder *st, opus_int32 sampling_rate, int channels) |
| 1993 | { |
| 1994 | int ret; |
| 1995 | ret = opus_custom_decoder_init(st, opus_custom_mode_create(48000, 960, NULL), channels); |
| 1996 | if (ret != OPUS_OK) |
| 1997 | return ret; |
| 1998 | st->downsample = resampling_factor(sampling_rate); |
| 1999 | if (st->downsample==0) |
| 2000 | return OPUS_BAD_ARG; |
| 2001 | else |
| 2002 | return OPUS_OK; |
| 2003 | } |
| 2004 | |
| 2005 | OPUS_CUSTOM_NOSTATIC int opus_custom_decoder_init(CELTDecoder *st, const CELTMode *mode, int channels) |
| 2006 | { |
| 2007 | if (channels < 0 || channels > 2) |
| 2008 | return OPUS_BAD_ARG; |
| 2009 | |
| 2010 | if (st==NULL) |
| 2011 | return OPUS_ALLOC_FAIL; |
| 2012 | |
| 2013 | OPUS_CLEAR((char*)st, opus_custom_decoder_get_size(mode, channels)); |
| 2014 | |
| 2015 | st->mode = mode; |
| 2016 | st->overlap = mode->overlap; |
| 2017 | st->stream_channels = st->channels = channels; |
| 2018 | |
| 2019 | st->downsample = 1; |
| 2020 | st->start = 0; |
| 2021 | st->end = st->mode->effEBands; |
| 2022 | st->signalling = 1; |
| 2023 | |
| 2024 | st->loss_count = 0; |
| 2025 | |
| 2026 | opus_custom_decoder_ctl(st, OPUS_RESET_STATE); |
| 2027 | |
| 2028 | return OPUS_OK; |
| 2029 | } |
| 2030 | |
| 2031 | #ifdef CUSTOM_MODES |
| 2032 | void opus_custom_decoder_destroy(CELTDecoder *st) |
| 2033 | { |
| 2034 | opus_free(st); |
| 2035 | } |
| 2036 | #endif /* CUSTOM_MODES */ |
| 2037 | |
| 2038 | static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_RESTRICT pcm, int N, int LM) |
| 2039 | { |
| 2040 | int c; |
| 2041 | int pitch_index; |
| 2042 | opus_val16 fade = Q15ONE; |
| 2043 | int i, len; |
| 2044 | const int C = st->channels; |
| 2045 | int offset; |
| 2046 | celt_sig *out_mem[2]; |
| 2047 | celt_sig *decode_mem[2]; |
| 2048 | celt_sig *overlap_mem[2]; |
| 2049 | opus_val16 *lpc; |
| 2050 | opus_val32 *out_syn[2]; |
| 2051 | opus_val16 *oldBandE, *oldLogE, *oldLogE2, *backgroundLogE; |
| 2052 | const OpusCustomMode *mode; |
| 2053 | int nbEBands; |
| 2054 | int overlap; |
| 2055 | const opus_int16 *eBands; |
| 2056 | SAVE_STACK; |
| 2057 | |
| 2058 | mode = st->mode; |
| 2059 | nbEBands = mode->nbEBands; |
| 2060 | overlap = mode->overlap; |
| 2061 | eBands = mode->eBands; |
| 2062 | |
| 2063 | c=0; do { |
| 2064 | decode_mem[c] = st->_decode_mem + c*(DECODE_BUFFER_SIZE+st->overlap); |
| 2065 | out_mem[c] = decode_mem[c]+DECODE_BUFFER_SIZE-MAX_PERIOD; |
| 2066 | overlap_mem[c] = decode_mem[c]+DECODE_BUFFER_SIZE; |
| 2067 | } while (++c<C); |
| 2068 | lpc = (opus_val16*)(st->_decode_mem+(DECODE_BUFFER_SIZE+st->overlap)*C); |
| 2069 | oldBandE = lpc+C*LPC_ORDER; |
| 2070 | oldLogE = oldBandE + 2*nbEBands; |
| 2071 | oldLogE2 = oldLogE + 2*nbEBands; |
| 2072 | backgroundLogE = oldLogE2 + 2*nbEBands; |
| 2073 | |
| 2074 | c=0; do { |
| 2075 | out_syn[c] = out_mem[c]+MAX_PERIOD-N; |
| 2076 | } while (++c<C); |
| 2077 | |
| 2078 | len = N+overlap; |
| 2079 | |
| 2080 | if (st->loss_count >= 5 || st->start!=0) |
| 2081 | { |
| 2082 | /* Noise-based PLC/CNG */ |
| 2083 | VARDECL(celt_sig, freq); |
| 2084 | VARDECL(celt_norm, X); |
| 2085 | VARDECL(celt_ener, bandE); |
| 2086 | opus_uint32 seed; |
| 2087 | int effEnd; |
| 2088 | |
| 2089 | effEnd = st->end; |
| 2090 | if (effEnd > mode->effEBands) |
| 2091 | effEnd = mode->effEBands; |
| 2092 | |
| 2093 | ALLOC(freq, C*N, celt_sig); /**< Interleaved signal MDCTs */ |
| 2094 | ALLOC(X, C*N, celt_norm); /**< Interleaved normalised MDCTs */ |
| 2095 | ALLOC(bandE, nbEBands*C, celt_ener); |
| 2096 | |
| 2097 | if (st->loss_count >= 5) |
| 2098 | log2Amp(mode, st->start, st->end, bandE, backgroundLogE, C); |
| 2099 | else { |
| 2100 | /* Energy decay */ |
| 2101 | opus_val16 decay = st->loss_count==0 ? QCONST16(1.5f, DB_SHIFT) : QCONST16(.5f, DB_SHIFT); |
| 2102 | c=0; do |
| 2103 | { |
| 2104 | for (i=st->start;i<st->end;i++) |
| 2105 | oldBandE[c*nbEBands+i] -= decay; |
| 2106 | } while (++c<C); |
| 2107 | log2Amp(mode, st->start, st->end, bandE, oldBandE, C); |
| 2108 | } |
| 2109 | seed = st->rng; |
| 2110 | for (c=0;c<C;c++) |
| 2111 | { |
| 2112 | for (i=0;i<(st->mode->eBands[st->start]<<LM);i++) |
| 2113 | X[c*N+i] = 0; |
| 2114 | for (i=st->start;i<mode->effEBands;i++) |
| 2115 | { |
| 2116 | int j; |
| 2117 | int boffs; |
| 2118 | int blen; |
| 2119 | boffs = N*c+(eBands[i]<<LM); |
| 2120 | blen = (eBands[i+1]-eBands[i])<<LM; |
| 2121 | for (j=0;j<blen;j++) |
| 2122 | { |
| 2123 | seed = celt_lcg_rand(seed); |
| 2124 | X[boffs+j] = (celt_norm)((opus_int32)seed>>20); |
| 2125 | } |
| 2126 | renormalise_vector(X+boffs, blen, Q15ONE); |
| 2127 | } |
| 2128 | for (i=(st->mode->eBands[st->end]<<LM);i<N;i++) |
| 2129 | X[c*N+i] = 0; |
| 2130 | } |
| 2131 | st->rng = seed; |
| 2132 | |
| 2133 | denormalise_bands(mode, X, freq, bandE, mode->effEBands, C, 1<<LM); |
| 2134 | |
| 2135 | c=0; do |
| 2136 | for (i=0;i<st->mode->eBands[st->start]<<LM;i++) |
| 2137 | freq[c*N+i] = 0; |
| 2138 | while (++c<C); |
| 2139 | c=0; do { |
| 2140 | int bound = eBands[effEnd]<<LM; |
| 2141 | if (st->downsample!=1) |
| 2142 | bound = IMIN(bound, N/st->downsample); |
| 2143 | for (i=bound;i<N;i++) |
| 2144 | freq[c*N+i] = 0; |
| 2145 | } while (++c<C); |
| 2146 | c=0; do { |
| 2147 | OPUS_MOVE(decode_mem[c], decode_mem[c]+N, DECODE_BUFFER_SIZE-N+overlap); |
| 2148 | } while (++c<C); |
| 2149 | compute_inv_mdcts(mode, 0, freq, out_syn, overlap_mem, C, LM); |
| 2150 | } else { |
| 2151 | /* Pitch-based PLC */ |
| 2152 | VARDECL(opus_val32, etmp); |
| 2153 | |
| 2154 | if (st->loss_count == 0) |
| 2155 | { |
| 2156 | opus_val16 pitch_buf[DECODE_BUFFER_SIZE>>1]; |
| 2157 | /* Corresponds to a min pitch of 67 Hz. It's possible to save CPU in this |
| 2158 | search by using only part of the decode buffer */ |
| 2159 | int poffset = 720; |
| 2160 | pitch_downsample(decode_mem, pitch_buf, DECODE_BUFFER_SIZE, C); |
| 2161 | /* Max pitch is 100 samples (480 Hz) */ |
| 2162 | pitch_search(pitch_buf+((poffset)>>1), pitch_buf, DECODE_BUFFER_SIZE-poffset, |
| 2163 | poffset-100, &pitch_index); |
| 2164 | pitch_index = poffset-pitch_index; |
| 2165 | st->last_pitch_index = pitch_index; |
| 2166 | } else { |
| 2167 | pitch_index = st->last_pitch_index; |
| 2168 | fade = QCONST16(.8f,15); |
| 2169 | } |
| 2170 | |
| 2171 | ALLOC(etmp, overlap, opus_val32); |
| 2172 | c=0; do { |
| 2173 | opus_val16 exc[MAX_PERIOD]; |
| 2174 | opus_val32 ac[LPC_ORDER+1]; |
| 2175 | opus_val16 decay; |
| 2176 | opus_val16 attenuation; |
| 2177 | opus_val32 S1=0; |
| 2178 | opus_val16 mem[LPC_ORDER]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; |
| 2179 | opus_val32 *e = out_syn[c]; |
| 2180 | |
| 2181 | |
| 2182 | offset = MAX_PERIOD-pitch_index; |
| 2183 | for (i=0;i<MAX_PERIOD;i++) |
| 2184 | exc[i] = ROUND16(out_mem[c][i], SIG_SHIFT); |
| 2185 | |
| 2186 | /* Compute LPC coefficients for the last MAX_PERIOD samples before the loss so we can |
| 2187 | work in the excitation-filter domain */ |
| 2188 | if (st->loss_count == 0) |
| 2189 | { |
| 2190 | _celt_autocorr(exc, ac, mode->window, overlap, |
| 2191 | LPC_ORDER, MAX_PERIOD); |
| 2192 | |
| 2193 | /* Noise floor -40 dB */ |
| 2194 | #ifdef FIXED_POINT |
| 2195 | ac[0] += SHR32(ac[0],13); |
| 2196 | #else |
| 2197 | ac[0] *= 1.0001f; |
| 2198 | #endif |
| 2199 | /* Lag windowing */ |
| 2200 | for (i=1;i<=LPC_ORDER;i++) |
| 2201 | { |
| 2202 | /*ac[i] *= exp(-.5*(2*M_PI*.002*i)*(2*M_PI*.002*i));*/ |
| 2203 | #ifdef FIXED_POINT |
| 2204 | ac[i] -= MULT16_32_Q15(2*i*i, ac[i]); |
| 2205 | #else |
| 2206 | ac[i] -= ac[i]*(.008f*i)*(.008f*i); |
| 2207 | #endif |
| 2208 | } |
| 2209 | |
| 2210 | _celt_lpc(lpc+c*LPC_ORDER, ac, LPC_ORDER); |
| 2211 | } |
| 2212 | /* Samples just before the beginning of exc */ |
| 2213 | for (i=0;i<LPC_ORDER;i++) |
| 2214 | mem[i] = ROUND16(out_mem[c][-1-i], SIG_SHIFT); |
| 2215 | /* Compute the excitation for MAX_PERIOD samples before the loss */ |
| 2216 | celt_fir(exc, lpc+c*LPC_ORDER, exc, MAX_PERIOD, LPC_ORDER, mem); |
| 2217 | |
| 2218 | /* Check if the waveform is decaying (and if so how fast) |
| 2219 | We do this to avoid adding energy when concealing in a segment |
| 2220 | with decaying energy */ |
| 2221 | { |
| 2222 | opus_val32 E1=1, E2=1; |
| 2223 | int period; |
| 2224 | #ifdef FIXED_POINT |
| 2225 | int shift; |
| 2226 | #endif |
| 2227 | |
| 2228 | if (pitch_index <= MAX_PERIOD/2) |
| 2229 | period = pitch_index; |
| 2230 | else |
| 2231 | period = MAX_PERIOD/2; |
| 2232 | #ifdef FIXED_POINT |
| 2233 | shift = IMAX(0,2*celt_zlog2(celt_maxabs16(&exc[MAX_PERIOD-2*period], 2*period))-20); |
| 2234 | #endif |
| 2235 | for (i=0;i<period;i++) |
| 2236 | { |
| 2237 | E1 += SHR32(MULT16_16(exc[MAX_PERIOD-period+i],exc[MAX_PERIOD-period+i]),shift); |
| 2238 | E2 += SHR32(MULT16_16(exc[MAX_PERIOD-2*period+i],exc[MAX_PERIOD-2*period+i]),shift); |
| 2239 | } |
| 2240 | if (E1 > E2) |
| 2241 | E1 = E2; |
| 2242 | decay = celt_sqrt(frac_div32(SHR32(E1,1),E2)); |
| 2243 | attenuation = decay; |
| 2244 | } |
| 2245 | |
| 2246 | /* Move memory one frame to the left */ |
| 2247 | OPUS_MOVE(decode_mem[c], decode_mem[c]+N, DECODE_BUFFER_SIZE-N+overlap); |
| 2248 | |
| 2249 | /* Extrapolate excitation with the right period, taking decay into account */ |
| 2250 | for (i=0;i<len;i++) |
| 2251 | { |
| 2252 | opus_val16 tmp; |
| 2253 | if (offset+i >= MAX_PERIOD) |
| 2254 | { |
| 2255 | offset -= pitch_index; |
| 2256 | attenuation = MULT16_16_Q15(attenuation, decay); |
| 2257 | } |
| 2258 | e[i] = SHL32(EXTEND32(MULT16_16_Q15(attenuation, exc[offset+i])), SIG_SHIFT); |
| 2259 | /* Compute the energy of the previously decoded signal whose |
| 2260 | excitation we're copying */ |
| 2261 | tmp = ROUND16(out_mem[c][-N+offset+i],SIG_SHIFT); |
| 2262 | S1 += SHR32(MULT16_16(tmp,tmp),8); |
| 2263 | } |
| 2264 | |
| 2265 | /* Copy the last decoded samples (prior to the overlap region) to |
| 2266 | synthesis filter memory so we can have a continuous signal. */ |
| 2267 | for (i=0;i<LPC_ORDER;i++) |
| 2268 | mem[i] = ROUND16(out_mem[c][MAX_PERIOD-N-1-i], SIG_SHIFT); |
| 2269 | /* Apply the fading if not the first loss */ |
| 2270 | for (i=0;i<len;i++) |
| 2271 | e[i] = MULT16_32_Q15(fade, e[i]); |
| 2272 | /* Synthesis filter -- back in the signal domain */ |
| 2273 | celt_iir(e, lpc+c*LPC_ORDER, e, len, LPC_ORDER, mem); |
| 2274 | |
| 2275 | /* Check if the synthesis energy is higher than expected, which can |
| 2276 | happen with the signal changes during our window. If so, attenuate. */ |
| 2277 | { |
| 2278 | opus_val32 S2=0; |
| 2279 | for (i=0;i<len;i++) |
| 2280 | { |
| 2281 | opus_val16 tmp = ROUND16(e[i],SIG_SHIFT); |
| 2282 | S2 += SHR32(MULT16_16(tmp,tmp),8); |
| 2283 | } |
| 2284 | /* This checks for an "explosion" in the synthesis */ |
| 2285 | #ifdef FIXED_POINT |
| 2286 | if (!(S1 > SHR32(S2,2))) |
| 2287 | #else |
| 2288 | /* Float test is written this way to catch NaNs at the same time */ |
| 2289 | if (!(S1 > 0.2f*S2)) |
| 2290 | #endif |
| 2291 | { |
| 2292 | for (i=0;i<len;i++) |
| 2293 | e[i] = 0; |
| 2294 | } else if (S1 < S2) |
| 2295 | { |
| 2296 | opus_val16 ratio = celt_sqrt(frac_div32(SHR32(S1,1)+1,S2+1)); |
| 2297 | for (i=0;i<overlap;i++) |
| 2298 | { |
| 2299 | opus_val16 tmp_g = Q15ONE - MULT16_16_Q15(mode->window[i], Q15ONE-ratio); |
| 2300 | e[i] = MULT16_32_Q15(tmp_g, e[i]); |
| 2301 | } |
| 2302 | for (i=overlap;i<len;i++) |
| 2303 | e[i] = MULT16_32_Q15(ratio, e[i]); |
| 2304 | } |
| 2305 | } |
| 2306 | |
| 2307 | /* Apply pre-filter to the MDCT overlap for the next frame because the |
| 2308 | post-filter will be re-applied in the decoder after the MDCT overlap */ |
| 2309 | comb_filter(etmp, out_mem[c]+MAX_PERIOD, st->postfilter_period, st->postfilter_period, st->overlap, |
| 2310 | -st->postfilter_gain, -st->postfilter_gain, st->postfilter_tapset, st->postfilter_tapset, |
| 2311 | NULL, 0); |
| 2312 | |
| 2313 | /* Simulate TDAC on the concealed audio so that it blends with the |
| 2314 | MDCT of next frames. */ |
| 2315 | for (i=0;i<overlap/2;i++) |
| 2316 | { |
| 2317 | opus_val32 tmp; |
| 2318 | tmp = MULT16_32_Q15(mode->window[i], etmp[overlap-1-i]) + |
| 2319 | MULT16_32_Q15(mode->window[overlap-i-1], etmp[i ]); |
| 2320 | out_mem[c][MAX_PERIOD+i] = MULT16_32_Q15(mode->window[overlap-i-1], tmp); |
| 2321 | out_mem[c][MAX_PERIOD+overlap-i-1] = MULT16_32_Q15(mode->window[i], tmp); |
| 2322 | } |
| 2323 | } while (++c<C); |
| 2324 | } |
| 2325 | |
| 2326 | deemphasis(out_syn, pcm, N, C, st->downsample, mode->preemph, st->preemph_memD); |
| 2327 | |
| 2328 | st->loss_count++; |
| 2329 | |
| 2330 | RESTORE_STACK; |
| 2331 | } |
| 2332 | |
| 2333 | int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, opus_val16 * OPUS_RESTRICT pcm, int frame_size, ec_dec *dec) |
| 2334 | { |
| 2335 | int c, i, N; |
| 2336 | int spread_decision; |
| 2337 | opus_int32 bits; |
| 2338 | ec_dec _dec; |
| 2339 | VARDECL(celt_sig, freq); |
| 2340 | VARDECL(celt_norm, X); |
| 2341 | VARDECL(celt_ener, bandE); |
| 2342 | VARDECL(int, fine_quant); |
| 2343 | VARDECL(int, pulses); |
| 2344 | VARDECL(int, cap); |
| 2345 | VARDECL(int, offsets); |
| 2346 | VARDECL(int, fine_priority); |
| 2347 | VARDECL(int, tf_res); |
| 2348 | VARDECL(unsigned char, collapse_masks); |
| 2349 | celt_sig *out_mem[2]; |
| 2350 | celt_sig *decode_mem[2]; |
| 2351 | celt_sig *overlap_mem[2]; |
| 2352 | celt_sig *out_syn[2]; |
| 2353 | opus_val16 *lpc; |
| 2354 | opus_val16 *oldBandE, *oldLogE, *oldLogE2, *backgroundLogE; |
| 2355 | |
| 2356 | int shortBlocks; |
| 2357 | int isTransient; |
| 2358 | int intra_ener; |
| 2359 | const int CC = st->channels; |
| 2360 | int LM, M; |
| 2361 | int effEnd; |
| 2362 | int codedBands; |
| 2363 | int alloc_trim; |
| 2364 | int postfilter_pitch; |
| 2365 | opus_val16 postfilter_gain; |
| 2366 | int intensity=0; |
| 2367 | int dual_stereo=0; |
| 2368 | opus_int32 total_bits; |
| 2369 | opus_int32 balance; |
| 2370 | opus_int32 tell; |
| 2371 | int dynalloc_logp; |
| 2372 | int postfilter_tapset; |
| 2373 | int anti_collapse_rsv; |
| 2374 | int anti_collapse_on=0; |
| 2375 | int silence; |
| 2376 | int C = st->stream_channels; |
| 2377 | ALLOC_STACK; |
| 2378 | |
| 2379 | frame_size *= st->downsample; |
| 2380 | |
| 2381 | c=0; do { |
| 2382 | decode_mem[c] = st->_decode_mem + c*(DECODE_BUFFER_SIZE+st->overlap); |
| 2383 | out_mem[c] = decode_mem[c]+DECODE_BUFFER_SIZE-MAX_PERIOD; |
| 2384 | overlap_mem[c] = decode_mem[c]+DECODE_BUFFER_SIZE; |
| 2385 | } while (++c<CC); |
| 2386 | lpc = (opus_val16*)(st->_decode_mem+(DECODE_BUFFER_SIZE+st->overlap)*CC); |
| 2387 | oldBandE = lpc+CC*LPC_ORDER; |
| 2388 | oldLogE = oldBandE + 2*st->mode->nbEBands; |
| 2389 | oldLogE2 = oldLogE + 2*st->mode->nbEBands; |
| 2390 | backgroundLogE = oldLogE2 + 2*st->mode->nbEBands; |
| 2391 | |
| 2392 | #ifdef CUSTOM_MODES |
| 2393 | if (st->signalling && data!=NULL) |
| 2394 | { |
| 2395 | int data0=data[0]; |
| 2396 | /* Convert "standard mode" to Opus header */ |
| 2397 | if (st->mode->Fs==48000 && st->mode->shortMdctSize==120) |
| 2398 | { |
| 2399 | data0 = fromOpus(data0); |
| 2400 | if (data0<0) |
| 2401 | return OPUS_INVALID_PACKET; |
| 2402 | } |
| 2403 | st->end = IMAX(1, st->mode->effEBands-2*(data0>>5)); |
| 2404 | LM = (data0>>3)&0x3; |
| 2405 | C = 1 + ((data0>>2)&0x1); |
| 2406 | data++; |
| 2407 | len--; |
| 2408 | if (LM>st->mode->maxLM) |
| 2409 | return OPUS_INVALID_PACKET; |
| 2410 | if (frame_size < st->mode->shortMdctSize<<LM) |
| 2411 | return OPUS_BUFFER_TOO_SMALL; |
| 2412 | else |
| 2413 | frame_size = st->mode->shortMdctSize<<LM; |
| 2414 | } else { |
| 2415 | #else |
| 2416 | { |
| 2417 | #endif |
| 2418 | for (LM=0;LM<=st->mode->maxLM;LM++) |
| 2419 | if (st->mode->shortMdctSize<<LM==frame_size) |
| 2420 | break; |
| 2421 | if (LM>st->mode->maxLM) |
| 2422 | return OPUS_BAD_ARG; |
| 2423 | } |
| 2424 | M=1<<LM; |
| 2425 | |
| 2426 | if (len<0 || len>1275 || pcm==NULL) |
| 2427 | return OPUS_BAD_ARG; |
| 2428 | |
| 2429 | N = M*st->mode->shortMdctSize; |
| 2430 | |
| 2431 | effEnd = st->end; |
| 2432 | if (effEnd > st->mode->effEBands) |
| 2433 | effEnd = st->mode->effEBands; |
| 2434 | |
| 2435 | if (data == NULL || len<=1) |
| 2436 | { |
| 2437 | celt_decode_lost(st, pcm, N, LM); |
| 2438 | RESTORE_STACK; |
| 2439 | return frame_size/st->downsample; |
| 2440 | } |
| 2441 | |
| 2442 | ALLOC(freq, IMAX(CC,C)*N, celt_sig); /**< Interleaved signal MDCTs */ |
| 2443 | ALLOC(X, C*N, celt_norm); /**< Interleaved normalised MDCTs */ |
| 2444 | ALLOC(bandE, st->mode->nbEBands*C, celt_ener); |
| 2445 | c=0; do |
| 2446 | for (i=0;i<M*st->mode->eBands[st->start];i++) |
| 2447 | X[c*N+i] = 0; |
| 2448 | while (++c<C); |
| 2449 | c=0; do |
| 2450 | for (i=M*st->mode->eBands[effEnd];i<N;i++) |
| 2451 | X[c*N+i] = 0; |
| 2452 | while (++c<C); |
| 2453 | |
| 2454 | if (dec == NULL) |
| 2455 | { |
| 2456 | ec_dec_init(&_dec,(unsigned char*)data,len); |
| 2457 | dec = &_dec; |
| 2458 | } |
| 2459 | |
| 2460 | if (C==1) |
| 2461 | { |
| 2462 | for (i=0;i<st->mode->nbEBands;i++) |
| 2463 | oldBandE[i]=MAX16(oldBandE[i],oldBandE[st->mode->nbEBands+i]); |
| 2464 | } |
| 2465 | |
| 2466 | total_bits = len*8; |
| 2467 | tell = ec_tell(dec); |
| 2468 | |
| 2469 | if (tell >= total_bits) |
| 2470 | silence = 1; |
| 2471 | else if (tell==1) |
| 2472 | silence = ec_dec_bit_logp(dec, 15); |
| 2473 | else |
| 2474 | silence = 0; |
| 2475 | if (silence) |
| 2476 | { |
| 2477 | /* Pretend we've read all the remaining bits */ |
| 2478 | tell = len*8; |
| 2479 | dec->nbits_total+=tell-ec_tell(dec); |
| 2480 | } |
| 2481 | |
| 2482 | postfilter_gain = 0; |
| 2483 | postfilter_pitch = 0; |
| 2484 | postfilter_tapset = 0; |
| 2485 | if (st->start==0 && tell+16 <= total_bits) |
| 2486 | { |
| 2487 | if(ec_dec_bit_logp(dec, 1)) |
| 2488 | { |
| 2489 | int qg, octave; |
| 2490 | octave = ec_dec_uint(dec, 6); |
| 2491 | postfilter_pitch = (16<<octave)+ec_dec_bits(dec, 4+octave)-1; |
| 2492 | qg = ec_dec_bits(dec, 3); |
| 2493 | if (ec_tell(dec)+2<=total_bits) |
| 2494 | postfilter_tapset = ec_dec_icdf(dec, tapset_icdf, 2); |
| 2495 | postfilter_gain = QCONST16(.09375f,15)*(qg+1); |
| 2496 | } |
| 2497 | tell = ec_tell(dec); |
| 2498 | } |
| 2499 | |
| 2500 | if (LM > 0 && tell+3 <= total_bits) |
| 2501 | { |
| 2502 | isTransient = ec_dec_bit_logp(dec, 3); |
| 2503 | tell = ec_tell(dec); |
| 2504 | } |
| 2505 | else |
| 2506 | isTransient = 0; |
| 2507 | |
| 2508 | if (isTransient) |
| 2509 | shortBlocks = M; |
| 2510 | else |
| 2511 | shortBlocks = 0; |
| 2512 | |
| 2513 | /* Decode the global flags (first symbols in the stream) */ |
| 2514 | intra_ener = tell+3<=total_bits ? ec_dec_bit_logp(dec, 3) : 0; |
| 2515 | /* Get band energies */ |
| 2516 | unquant_coarse_energy(st->mode, st->start, st->end, oldBandE, |
| 2517 | intra_ener, dec, C, LM); |
| 2518 | |
| 2519 | ALLOC(tf_res, st->mode->nbEBands, int); |
| 2520 | tf_decode(st->start, st->end, isTransient, tf_res, LM, dec); |
| 2521 | |
| 2522 | tell = ec_tell(dec); |
| 2523 | spread_decision = SPREAD_NORMAL; |
| 2524 | if (tell+4 <= total_bits) |
| 2525 | spread_decision = ec_dec_icdf(dec, spread_icdf, 5); |
| 2526 | |
| 2527 | ALLOC(pulses, st->mode->nbEBands, int); |
| 2528 | ALLOC(cap, st->mode->nbEBands, int); |
| 2529 | ALLOC(offsets, st->mode->nbEBands, int); |
| 2530 | ALLOC(fine_priority, st->mode->nbEBands, int); |
| 2531 | |
| 2532 | init_caps(st->mode,cap,LM,C); |
| 2533 | |
| 2534 | dynalloc_logp = 6; |
| 2535 | total_bits<<=BITRES; |
| 2536 | tell = ec_tell_frac(dec); |
| 2537 | for (i=st->start;i<st->end;i++) |
| 2538 | { |
| 2539 | int width, quanta; |
| 2540 | int dynalloc_loop_logp; |
| 2541 | int boost; |
| 2542 | width = C*(st->mode->eBands[i+1]-st->mode->eBands[i])<<LM; |
| 2543 | /* quanta is 6 bits, but no more than 1 bit/sample |
| 2544 | and no less than 1/8 bit/sample */ |
| 2545 | quanta = IMIN(width<<BITRES, IMAX(6<<BITRES, width)); |
| 2546 | dynalloc_loop_logp = dynalloc_logp; |
| 2547 | boost = 0; |
| 2548 | while (tell+(dynalloc_loop_logp<<BITRES) < total_bits && boost < cap[i]) |
| 2549 | { |
| 2550 | int flag; |
| 2551 | flag = ec_dec_bit_logp(dec, dynalloc_loop_logp); |
| 2552 | tell = ec_tell_frac(dec); |
| 2553 | if (!flag) |
| 2554 | break; |
| 2555 | boost += quanta; |
| 2556 | total_bits -= quanta; |
| 2557 | dynalloc_loop_logp = 1; |
| 2558 | } |
| 2559 | offsets[i] = boost; |
| 2560 | /* Making dynalloc more likely */ |
| 2561 | if (boost>0) |
| 2562 | dynalloc_logp = IMAX(2, dynalloc_logp-1); |
| 2563 | } |
| 2564 | |
| 2565 | ALLOC(fine_quant, st->mode->nbEBands, int); |
| 2566 | alloc_trim = tell+(6<<BITRES) <= total_bits ? |
| 2567 | ec_dec_icdf(dec, trim_icdf, 7) : 5; |
| 2568 | |
| 2569 | bits = (((opus_int32)len*8)<<BITRES) - ec_tell_frac(dec) - 1; |
| 2570 | anti_collapse_rsv = isTransient&&LM>=2&&bits>=((LM+2)<<BITRES) ? (1<<BITRES) : 0; |
| 2571 | bits -= anti_collapse_rsv; |
| 2572 | codedBands = compute_allocation(st->mode, st->start, st->end, offsets, cap, |
| 2573 | alloc_trim, &intensity, &dual_stereo, bits, &balance, pulses, |
| 2574 | fine_quant, fine_priority, C, LM, dec, 0, 0); |
| 2575 | |
| 2576 | unquant_fine_energy(st->mode, st->start, st->end, oldBandE, fine_quant, dec, C); |
| 2577 | |
| 2578 | /* Decode fixed codebook */ |
| 2579 | ALLOC(collapse_masks, C*st->mode->nbEBands, unsigned char); |
| 2580 | quant_all_bands(0, st->mode, st->start, st->end, X, C==2 ? X+N : NULL, collapse_masks, |
| 2581 | NULL, pulses, shortBlocks, spread_decision, dual_stereo, intensity, tf_res, |
| 2582 | len*(8<<BITRES)-anti_collapse_rsv, balance, dec, LM, codedBands, &st->rng); |
| 2583 | |
| 2584 | if (anti_collapse_rsv > 0) |
| 2585 | { |
| 2586 | anti_collapse_on = ec_dec_bits(dec, 1); |
| 2587 | } |
| 2588 | |
| 2589 | unquant_energy_finalise(st->mode, st->start, st->end, oldBandE, |
| 2590 | fine_quant, fine_priority, len*8-ec_tell(dec), dec, C); |
| 2591 | |
| 2592 | if (anti_collapse_on) |
| 2593 | anti_collapse(st->mode, X, collapse_masks, LM, C, N, |
| 2594 | st->start, st->end, oldBandE, oldLogE, oldLogE2, pulses, st->rng); |
| 2595 | |
| 2596 | log2Amp(st->mode, st->start, st->end, bandE, oldBandE, C); |
| 2597 | |
| 2598 | if (silence) |
| 2599 | { |
| 2600 | for (i=0;i<C*st->mode->nbEBands;i++) |
| 2601 | { |
| 2602 | bandE[i] = 0; |
| 2603 | oldBandE[i] = -QCONST16(28.f,DB_SHIFT); |
| 2604 | } |
| 2605 | } |
| 2606 | /* Synthesis */ |
| 2607 | denormalise_bands(st->mode, X, freq, bandE, effEnd, C, M); |
| 2608 | |
| 2609 | OPUS_MOVE(decode_mem[0], decode_mem[0]+N, DECODE_BUFFER_SIZE-N); |
| 2610 | if (CC==2) |
| 2611 | OPUS_MOVE(decode_mem[1], decode_mem[1]+N, DECODE_BUFFER_SIZE-N); |
| 2612 | |
| 2613 | c=0; do |
| 2614 | for (i=0;i<M*st->mode->eBands[st->start];i++) |
| 2615 | freq[c*N+i] = 0; |
| 2616 | while (++c<C); |
| 2617 | c=0; do { |
| 2618 | int bound = M*st->mode->eBands[effEnd]; |
| 2619 | if (st->downsample!=1) |
| 2620 | bound = IMIN(bound, N/st->downsample); |
| 2621 | for (i=bound;i<N;i++) |
| 2622 | freq[c*N+i] = 0; |
| 2623 | } while (++c<C); |
| 2624 | |
| 2625 | out_syn[0] = out_mem[0]+MAX_PERIOD-N; |
| 2626 | if (CC==2) |
| 2627 | out_syn[1] = out_mem[1]+MAX_PERIOD-N; |
| 2628 | |
| 2629 | if (CC==2&&C==1) |
| 2630 | { |
| 2631 | for (i=0;i<N;i++) |
| 2632 | freq[N+i] = freq[i]; |
| 2633 | } |
| 2634 | if (CC==1&&C==2) |
| 2635 | { |
| 2636 | for (i=0;i<N;i++) |
| 2637 | freq[i] = HALF32(ADD32(freq[i],freq[N+i])); |
| 2638 | } |
| 2639 | |
| 2640 | /* Compute inverse MDCTs */ |
| 2641 | compute_inv_mdcts(st->mode, shortBlocks, freq, out_syn, overlap_mem, CC, LM); |
| 2642 | |
| 2643 | c=0; do { |
| 2644 | st->postfilter_period=IMAX(st->postfilter_period, COMBFILTER_MINPERIOD); |
| 2645 | st->postfilter_period_old=IMAX(st->postfilter_period_old, COMBFILTER_MINPERIOD); |
| 2646 | comb_filter(out_syn[c], out_syn[c], st->postfilter_period_old, st->postfilter_period, st->mode->shortMdctSize, |
| 2647 | st->postfilter_gain_old, st->postfilter_gain, st->postfilter_tapset_old, st->postfilter_tapset, |
| 2648 | st->mode->window, st->overlap); |
| 2649 | if (LM!=0) |
| 2650 | comb_filter(out_syn[c]+st->mode->shortMdctSize, out_syn[c]+st->mode->shortMdctSize, st->postfilter_period, postfilter_pitch, N-st->mode->shortMdctSize, |
| 2651 | st->postfilter_gain, postfilter_gain, st->postfilter_tapset, postfilter_tapset, |
| 2652 | st->mode->window, st->mode->overlap); |
| 2653 | |
| 2654 | } while (++c<CC); |
| 2655 | st->postfilter_period_old = st->postfilter_period; |
| 2656 | st->postfilter_gain_old = st->postfilter_gain; |
| 2657 | st->postfilter_tapset_old = st->postfilter_tapset; |
| 2658 | st->postfilter_period = postfilter_pitch; |
| 2659 | st->postfilter_gain = postfilter_gain; |
| 2660 | st->postfilter_tapset = postfilter_tapset; |
| 2661 | if (LM!=0) |
| 2662 | { |
| 2663 | st->postfilter_period_old = st->postfilter_period; |
| 2664 | st->postfilter_gain_old = st->postfilter_gain; |
| 2665 | st->postfilter_tapset_old = st->postfilter_tapset; |
| 2666 | } |
| 2667 | |
| 2668 | if (C==1) { |
| 2669 | for (i=0;i<st->mode->nbEBands;i++) |
| 2670 | oldBandE[st->mode->nbEBands+i]=oldBandE[i]; |
| 2671 | } |
| 2672 | |
| 2673 | /* In case start or end were to change */ |
| 2674 | if (!isTransient) |
| 2675 | { |
| 2676 | for (i=0;i<2*st->mode->nbEBands;i++) |
| 2677 | oldLogE2[i] = oldLogE[i]; |
| 2678 | for (i=0;i<2*st->mode->nbEBands;i++) |
| 2679 | oldLogE[i] = oldBandE[i]; |
| 2680 | for (i=0;i<2*st->mode->nbEBands;i++) |
| 2681 | backgroundLogE[i] = MIN16(backgroundLogE[i] + M*QCONST16(0.001f,DB_SHIFT), oldBandE[i]); |
| 2682 | } else { |
| 2683 | for (i=0;i<2*st->mode->nbEBands;i++) |
| 2684 | oldLogE[i] = MIN16(oldLogE[i], oldBandE[i]); |
| 2685 | } |
| 2686 | c=0; do |
| 2687 | { |
| 2688 | for (i=0;i<st->start;i++) |
| 2689 | { |
| 2690 | oldBandE[c*st->mode->nbEBands+i]=0; |
| 2691 | oldLogE[c*st->mode->nbEBands+i]=oldLogE2[c*st->mode->nbEBands+i]=-QCONST16(28.f,DB_SHIFT); |
| 2692 | } |
| 2693 | for (i=st->end;i<st->mode->nbEBands;i++) |
| 2694 | { |
| 2695 | oldBandE[c*st->mode->nbEBands+i]=0; |
| 2696 | oldLogE[c*st->mode->nbEBands+i]=oldLogE2[c*st->mode->nbEBands+i]=-QCONST16(28.f,DB_SHIFT); |
| 2697 | } |
| 2698 | } while (++c<2); |
| 2699 | st->rng = dec->rng; |
| 2700 | |
| 2701 | deemphasis(out_syn, pcm, N, CC, st->downsample, st->mode->preemph, st->preemph_memD); |
| 2702 | st->loss_count = 0; |
| 2703 | RESTORE_STACK; |
| 2704 | if (ec_tell(dec) > 8*len) |
| 2705 | return OPUS_INTERNAL_ERROR; |
| 2706 | if(ec_get_error(dec)) |
| 2707 | st->error = 1; |
| 2708 | return frame_size/st->downsample; |
| 2709 | } |
| 2710 | |
| 2711 | |
| 2712 | #ifdef CUSTOM_MODES |
| 2713 | |
| 2714 | #ifdef FIXED_POINT |
| 2715 | int opus_custom_decode(CELTDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, opus_int16 * OPUS_RESTRICT pcm, int frame_size) |
| 2716 | { |
| 2717 | return celt_decode_with_ec(st, data, len, pcm, frame_size, NULL); |
| 2718 | } |
| 2719 | |
| 2720 | #ifndef DISABLE_FLOAT_API |
| 2721 | int opus_custom_decode_float(CELTDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, float * OPUS_RESTRICT pcm, int frame_size) |
| 2722 | { |
| 2723 | int j, ret, C, N; |
| 2724 | VARDECL(opus_int16, out); |
| 2725 | ALLOC_STACK; |
| 2726 | |
| 2727 | if (pcm==NULL) |
| 2728 | return OPUS_BAD_ARG; |
| 2729 | |
| 2730 | C = st->channels; |
| 2731 | N = frame_size; |
| 2732 | |
| 2733 | ALLOC(out, C*N, opus_int16); |
| 2734 | ret=celt_decode_with_ec(st, data, len, out, frame_size, NULL); |
| 2735 | if (ret>0) |
| 2736 | for (j=0;j<C*ret;j++) |
| 2737 | pcm[j]=out[j]*(1.f/32768.f); |
| 2738 | |
| 2739 | RESTORE_STACK; |
| 2740 | return ret; |
| 2741 | } |
| 2742 | #endif /* DISABLE_FLOAT_API */ |
| 2743 | |
| 2744 | #else |
| 2745 | |
| 2746 | int opus_custom_decode_float(CELTDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, float * OPUS_RESTRICT pcm, int frame_size) |
| 2747 | { |
| 2748 | return celt_decode_with_ec(st, data, len, pcm, frame_size, NULL); |
| 2749 | } |
| 2750 | |
| 2751 | int opus_custom_decode(CELTDecoder * OPUS_RESTRICT st, const unsigned char *data, int len, opus_int16 * OPUS_RESTRICT pcm, int frame_size) |
| 2752 | { |
| 2753 | int j, ret, C, N; |
| 2754 | VARDECL(celt_sig, out); |
| 2755 | ALLOC_STACK; |
| 2756 | |
| 2757 | if (pcm==NULL) |
| 2758 | return OPUS_BAD_ARG; |
| 2759 | |
| 2760 | C = st->channels; |
| 2761 | N = frame_size; |
| 2762 | ALLOC(out, C*N, celt_sig); |
| 2763 | |
| 2764 | ret=celt_decode_with_ec(st, data, len, out, frame_size, NULL); |
| 2765 | |
| 2766 | if (ret>0) |
| 2767 | for (j=0;j<C*ret;j++) |
| 2768 | pcm[j] = FLOAT2INT16 (out[j]); |
| 2769 | |
| 2770 | RESTORE_STACK; |
| 2771 | return ret; |
| 2772 | } |
| 2773 | |
| 2774 | #endif |
| 2775 | #endif /* CUSTOM_MODES */ |
| 2776 | |
| 2777 | int opus_custom_decoder_ctl(CELTDecoder * OPUS_RESTRICT st, int request, ...) |
| 2778 | { |
| 2779 | va_list ap; |
| 2780 | |
| 2781 | va_start(ap, request); |
| 2782 | switch (request) |
| 2783 | { |
| 2784 | case CELT_SET_START_BAND_REQUEST: |
| 2785 | { |
| 2786 | opus_int32 value = va_arg(ap, opus_int32); |
| 2787 | if (value<0 || value>=st->mode->nbEBands) |
| 2788 | goto bad_arg; |
| 2789 | st->start = value; |
| 2790 | } |
| 2791 | break; |
| 2792 | case CELT_SET_END_BAND_REQUEST: |
| 2793 | { |
| 2794 | opus_int32 value = va_arg(ap, opus_int32); |
| 2795 | if (value<1 || value>st->mode->nbEBands) |
| 2796 | goto bad_arg; |
| 2797 | st->end = value; |
| 2798 | } |
| 2799 | break; |
| 2800 | case CELT_SET_CHANNELS_REQUEST: |
| 2801 | { |
| 2802 | opus_int32 value = va_arg(ap, opus_int32); |
| 2803 | if (value<1 || value>2) |
| 2804 | goto bad_arg; |
| 2805 | st->stream_channels = value; |
| 2806 | } |
| 2807 | break; |
| 2808 | case CELT_GET_AND_CLEAR_ERROR_REQUEST: |
| 2809 | { |
| 2810 | opus_int32 *value = va_arg(ap, opus_int32*); |
| 2811 | if (value==NULL) |
| 2812 | goto bad_arg; |
| 2813 | *value=st->error; |
| 2814 | st->error = 0; |
| 2815 | } |
| 2816 | break; |
| 2817 | case OPUS_GET_LOOKAHEAD_REQUEST: |
| 2818 | { |
| 2819 | opus_int32 *value = va_arg(ap, opus_int32*); |
| 2820 | if (value==NULL) |
| 2821 | goto bad_arg; |
| 2822 | *value = st->overlap/st->downsample; |
| 2823 | } |
| 2824 | break; |
| 2825 | case OPUS_RESET_STATE: |
| 2826 | { |
| 2827 | int i; |
| 2828 | opus_val16 *lpc, *oldBandE, *oldLogE, *oldLogE2; |
| 2829 | lpc = (opus_val16*)(st->_decode_mem+(DECODE_BUFFER_SIZE+st->overlap)*st->channels); |
| 2830 | oldBandE = lpc+st->channels*LPC_ORDER; |
| 2831 | oldLogE = oldBandE + 2*st->mode->nbEBands; |
| 2832 | oldLogE2 = oldLogE + 2*st->mode->nbEBands; |
| 2833 | OPUS_CLEAR((char*)&st->DECODER_RESET_START, |
| 2834 | opus_custom_decoder_get_size(st->mode, st->channels)- |
| 2835 | ((char*)&st->DECODER_RESET_START - (char*)st)); |
| 2836 | for (i=0;i<2*st->mode->nbEBands;i++) |
| 2837 | oldLogE[i]=oldLogE2[i]=-QCONST16(28.f,DB_SHIFT); |
| 2838 | } |
| 2839 | break; |
| 2840 | case OPUS_GET_PITCH_REQUEST: |
| 2841 | { |
| 2842 | opus_int32 *value = va_arg(ap, opus_int32*); |
| 2843 | if (value==NULL) |
| 2844 | goto bad_arg; |
| 2845 | *value = st->postfilter_period; |
| 2846 | } |
| 2847 | break; |
| 2848 | case CELT_GET_MODE_REQUEST: |
| 2849 | { |
| 2850 | const CELTMode ** value = va_arg(ap, const CELTMode**); |
| 2851 | if (value==0) |
| 2852 | goto bad_arg; |
| 2853 | *value=st->mode; |
| 2854 | } |
| 2855 | break; |
| 2856 | case CELT_SET_SIGNALLING_REQUEST: |
| 2857 | { |
| 2858 | opus_int32 value = va_arg(ap, opus_int32); |
| 2859 | st->signalling = value; |
| 2860 | } |
| 2861 | break; |
| 2862 | case OPUS_GET_FINAL_RANGE_REQUEST: |
| 2863 | { |
| 2864 | opus_uint32 * value = va_arg(ap, opus_uint32 *); |
| 2865 | if (value==0) |
| 2866 | goto bad_arg; |
| 2867 | *value=st->rng; |
| 2868 | } |
| 2869 | break; |
| 2870 | default: |
| 2871 | goto bad_request; |
| 2872 | } |
| 2873 | va_end(ap); |
| 2874 | return OPUS_OK; |
| 2875 | bad_arg: |
| 2876 | va_end(ap); |
| 2877 | return OPUS_BAD_ARG; |
| 2878 | bad_request: |
| 2879 | va_end(ap); |
| 2880 | return OPUS_UNIMPLEMENTED; |
| 2881 | } |
| 2882 | |
| 2883 | |
| 2884 | |
| 2885 | const char *opus_strerror(int error) |
| 2886 | { |
| 2887 | static const char * const error_strings[8] = { |
| 2888 | "success", |
| 2889 | "invalid argument", |
| 2890 | "buffer too small", |
| 2891 | "internal error", |
| 2892 | "corrupted stream", |
| 2893 | "request not implemented", |
| 2894 | "invalid state", |
| 2895 | "memory allocation failed" |
| 2896 | }; |
| 2897 | if (error > 0 || error < -7) |
| 2898 | return "unknown error"; |
| 2899 | else |
| 2900 | return error_strings[-error]; |
| 2901 | } |
| 2902 | |
| 2903 | const char *opus_get_version_string(void) |
| 2904 | { |
| 2905 | return "libopus " PACKAGE_VERSION |
| 2906 | #ifdef FIXED_POINT |
| 2907 | "-fixed" |
| 2908 | #endif |
| 2909 | #ifdef FUZZING |
| 2910 | "-fuzzing" |
| 2911 | #endif |
| 2912 | ; |
| 2913 | } |