FFmpeg  4.4.6
takdec.c
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1 /*
2  * TAK decoder
3  * Copyright (c) 2012 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * TAK (Tom's lossless Audio Kompressor) decoder
25  * @author Paul B Mahol
26  */
27 
28 #include "libavutil/internal.h"
29 #include "libavutil/mem_internal.h"
30 #include "libavutil/samplefmt.h"
31 
32 #define BITSTREAM_READER_LE
33 #include "audiodsp.h"
34 #include "thread.h"
35 #include "avcodec.h"
36 #include "internal.h"
37 #include "unary.h"
38 #include "tak.h"
39 #include "takdsp.h"
40 
41 #define MAX_SUBFRAMES 8 ///< max number of subframes per channel
42 #define MAX_PREDICTORS 256
43 
44 typedef struct MCDParam {
45  int8_t present; ///< decorrelation parameter availability for this channel
46  int8_t index; ///< index into array of decorrelation types
47  int8_t chan1;
48  int8_t chan2;
49 } MCDParam;
50 
51 typedef struct TAKDecContext {
52  AVCodecContext *avctx; ///< parent AVCodecContext
56  GetBitContext gb; ///< bitstream reader initialized to start at the current frame
57 
58  int uval;
59  int nb_samples; ///< number of samples in the current frame
61  unsigned int decode_buffer_size;
62  int32_t *decoded[TAK_MAX_CHANNELS]; ///< decoded samples for each channel
63 
65  int8_t sample_shift[TAK_MAX_CHANNELS]; ///< shift applied to every sample in the channel
67  int nb_subframes; ///< number of subframes in the current frame
68  int16_t subframe_len[MAX_SUBFRAMES]; ///< subframe length in samples
70 
71  int8_t dmode; ///< channel decorrelation type in the current frame
72 
73  MCDParam mcdparams[TAK_MAX_CHANNELS]; ///< multichannel decorrelation parameters
74 
75  int8_t coding_mode[128];
77  DECLARE_ALIGNED(16, int16_t, residues)[544];
79 
80 static const int8_t mc_dmodes[] = { 1, 3, 4, 6, };
81 
82 static const uint16_t predictor_sizes[] = {
83  4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0,
84 };
85 
86 static const struct CParam {
87  int init;
88  int escape;
89  int scale;
90  int aescape;
91  int bias;
92 } xcodes[50] = {
93  { 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 },
94  { 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 },
95  { 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D },
96  { 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 },
97  { 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 },
98  { 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 },
99  { 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 },
100  { 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 },
101  { 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 },
102  { 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 },
103  { 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 },
104  { 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 },
105  { 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 },
106  { 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 },
107  { 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 },
108  { 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 },
109  { 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 },
110  { 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 },
111  { 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 },
112  { 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 },
113  { 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 },
114  { 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 },
115  { 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 },
116  { 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 },
117  { 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 },
118  { 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 },
119  { 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 },
120  { 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 },
121  { 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 },
122  { 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 },
123  { 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 },
124  { 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 },
125  { 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 },
126  { 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 },
127  { 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 },
128  { 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 },
129  { 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 },
130  { 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 },
131  { 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 },
132  { 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 },
133  { 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 },
134  { 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 },
135  { 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 },
136  { 0x17, 0x0300000, 0x0300000, 0x0D00000, 0x1800000 },
137  { 0x18, 0x0B00000, 0x0400000, 0x1C00000, 0x1900000 },
138  { 0x18, 0x0600000, 0x0600000, 0x1A00000, 0x3000000 },
139  { 0x19, 0x1600000, 0x0800000, 0x3800000, 0x3200000 },
140  { 0x19, 0x0C00000, 0x0C00000, 0x3400000, 0x6000000 },
141  { 0x1A, 0x2C00000, 0x1000000, 0x7000000, 0x6400000 },
142  { 0x1A, 0x1800000, 0x1800000, 0x6800000, 0xC000000 },
143 };
144 
145 static int set_bps_params(AVCodecContext *avctx)
146 {
147  switch (avctx->bits_per_raw_sample) {
148  case 8:
149  avctx->sample_fmt = AV_SAMPLE_FMT_U8P;
150  break;
151  case 16:
153  break;
154  case 24:
156  break;
157  default:
158  av_log(avctx, AV_LOG_ERROR, "invalid/unsupported bits per sample: %d\n",
159  avctx->bits_per_raw_sample);
160  return AVERROR_INVALIDDATA;
161  }
162 
163  return 0;
164 }
165 
167 {
168  TAKDecContext *s = avctx->priv_data;
169  int shift;
170 
171  if (avctx->sample_rate < 11025) {
172  shift = 3;
173  } else if (avctx->sample_rate < 22050) {
174  shift = 2;
175  } else if (avctx->sample_rate < 44100) {
176  shift = 1;
177  } else {
178  shift = 0;
179  }
180  s->uval = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << shift;
181  s->subframe_scale = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << 1;
182 }
183 
185 {
186  TAKDecContext *s = avctx->priv_data;
187 
188  ff_audiodsp_init(&s->adsp);
189  ff_takdsp_init(&s->tdsp);
190 
191  s->avctx = avctx;
193 
194  set_sample_rate_params(avctx);
195 
196  return set_bps_params(avctx);
197 }
198 
199 static void decode_lpc(int32_t *coeffs, int mode, int length)
200 {
201  int i;
202 
203  if (length < 2)
204  return;
205 
206  if (mode == 1) {
207  unsigned a1 = *coeffs++;
208  for (i = 0; i < length - 1 >> 1; i++) {
209  *coeffs += a1;
210  coeffs[1] += (unsigned)*coeffs;
211  a1 = coeffs[1];
212  coeffs += 2;
213  }
214  if (length - 1 & 1)
215  *coeffs += a1;
216  } else if (mode == 2) {
217  unsigned a1 = coeffs[1];
218  unsigned a2 = a1 + *coeffs;
219  coeffs[1] = a2;
220  if (length > 2) {
221  coeffs += 2;
222  for (i = 0; i < length - 2 >> 1; i++) {
223  unsigned a3 = *coeffs + a1;
224  unsigned a4 = a3 + a2;
225  *coeffs = a4;
226  a1 = coeffs[1] + a3;
227  a2 = a1 + a4;
228  coeffs[1] = a2;
229  coeffs += 2;
230  }
231  if (length & 1)
232  *coeffs += a1 + a2;
233  }
234  } else if (mode == 3) {
235  unsigned a1 = coeffs[1];
236  unsigned a2 = a1 + *coeffs;
237  coeffs[1] = a2;
238  if (length > 2) {
239  unsigned a3 = coeffs[2];
240  unsigned a4 = a3 + a1;
241  unsigned a5 = a4 + a2;
242  coeffs[2] = a5;
243  coeffs += 3;
244  for (i = 0; i < length - 3; i++) {
245  a3 += *coeffs;
246  a4 += a3;
247  a5 += a4;
248  *coeffs = a5;
249  coeffs++;
250  }
251  }
252  }
253 }
254 
255 static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
256 {
257  struct CParam code;
258  GetBitContext *gb = &s->gb;
259  int i;
260 
261  if (!mode) {
262  memset(decoded, 0, len * sizeof(*decoded));
263  return 0;
264  }
265 
266  if (mode > FF_ARRAY_ELEMS(xcodes))
267  return AVERROR_INVALIDDATA;
268  code = xcodes[mode - 1];
269 
270  for (i = 0; i < len; i++) {
271  unsigned x = get_bits_long(gb, code.init);
272  if (x >= code.escape && get_bits1(gb)) {
273  x |= 1 << code.init;
274  if (x >= code.aescape) {
275  unsigned scale = get_unary(gb, 1, 9);
276  if (scale == 9) {
277  int scale_bits = get_bits(gb, 3);
278  if (scale_bits > 0) {
279  if (scale_bits == 7) {
280  scale_bits += get_bits(gb, 5);
281  if (scale_bits > 29)
282  return AVERROR_INVALIDDATA;
283  }
284  scale = get_bits_long(gb, scale_bits) + 1;
285  x += code.scale * scale;
286  }
287  x += code.bias;
288  } else
289  x += code.scale * scale - code.escape;
290  } else
291  x -= code.escape;
292  }
293  decoded[i] = (x >> 1) ^ -(x & 1);
294  }
295 
296  return 0;
297 }
298 
299 static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
300 {
301  GetBitContext *gb = &s->gb;
302  int i, mode, ret;
303 
304  if (length > s->nb_samples)
305  return AVERROR_INVALIDDATA;
306 
307  if (get_bits1(gb)) {
308  int wlength, rval;
309 
310  wlength = length / s->uval;
311 
312  rval = length - (wlength * s->uval);
313 
314  if (rval < s->uval / 2)
315  rval += s->uval;
316  else
317  wlength++;
318 
319  if (wlength <= 1 || wlength > 128)
320  return AVERROR_INVALIDDATA;
321 
322  s->coding_mode[0] = mode = get_bits(gb, 6);
323 
324  for (i = 1; i < wlength; i++) {
325  int c = get_unary(gb, 1, 6);
326 
327  switch (c) {
328  case 6:
329  mode = get_bits(gb, 6);
330  break;
331  case 5:
332  case 4:
333  case 3: {
334  /* mode += sign ? (1 - c) : (c - 1) */
335  int sign = get_bits1(gb);
336  mode += (-sign ^ (c - 1)) + sign;
337  break;
338  }
339  case 2:
340  mode++;
341  break;
342  case 1:
343  mode--;
344  break;
345  }
346  s->coding_mode[i] = mode;
347  }
348 
349  i = 0;
350  while (i < wlength) {
351  int len = 0;
352 
353  mode = s->coding_mode[i];
354  do {
355  if (i >= wlength - 1)
356  len += rval;
357  else
358  len += s->uval;
359  i++;
360 
361  if (i == wlength)
362  break;
363  } while (s->coding_mode[i] == mode);
364 
365  if ((ret = decode_segment(s, mode, decoded, len)) < 0)
366  return ret;
367  decoded += len;
368  }
369  } else {
370  mode = get_bits(gb, 6);
371  if ((ret = decode_segment(s, mode, decoded, length)) < 0)
372  return ret;
373  }
374 
375  return 0;
376 }
377 
379 {
380  if (get_bits1(gb))
381  return get_bits(gb, 4) + 1;
382  else
383  return 0;
384 }
385 
386 static int decode_subframe(TAKDecContext *s, int32_t *decoded,
387  int subframe_size, int prev_subframe_size)
388 {
389  GetBitContext *gb = &s->gb;
390  int x, y, i, j, ret = 0;
391  int dshift, size, filter_quant, filter_order;
392  int tfilter[MAX_PREDICTORS];
393 
394  if (!get_bits1(gb))
395  return decode_residues(s, decoded, subframe_size);
396 
397  filter_order = predictor_sizes[get_bits(gb, 4)];
398 
399  if (prev_subframe_size > 0 && get_bits1(gb)) {
400  if (filter_order > prev_subframe_size)
401  return AVERROR_INVALIDDATA;
402 
403  decoded -= filter_order;
404  subframe_size += filter_order;
405 
406  if (filter_order > subframe_size)
407  return AVERROR_INVALIDDATA;
408  } else {
409  int lpc_mode;
410 
411  if (filter_order > subframe_size)
412  return AVERROR_INVALIDDATA;
413 
414  lpc_mode = get_bits(gb, 2);
415  if (lpc_mode > 2)
416  return AVERROR_INVALIDDATA;
417 
418  if ((ret = decode_residues(s, decoded, filter_order)) < 0)
419  return ret;
420 
421  if (lpc_mode)
422  decode_lpc(decoded, lpc_mode, filter_order);
423  }
424 
425  dshift = get_bits_esc4(gb);
426  size = get_bits1(gb) + 6;
427 
428  filter_quant = 10;
429  if (get_bits1(gb)) {
430  filter_quant -= get_bits(gb, 3) + 1;
431  if (filter_quant < 3)
432  return AVERROR_INVALIDDATA;
433  }
434 
435  if (get_bits_left(gb) < 2*10 + 2*size)
436  return AVERROR_INVALIDDATA;
437 
438  s->predictors[0] = get_sbits(gb, 10);
439  s->predictors[1] = get_sbits(gb, 10);
440  s->predictors[2] = get_sbits(gb, size) * (1 << (10 - size));
441  s->predictors[3] = get_sbits(gb, size) * (1 << (10 - size));
442  if (filter_order > 4) {
443  int tmp = size - get_bits1(gb);
444 
445  for (i = 4; i < filter_order; i++) {
446  if (!(i & 3))
447  x = tmp - get_bits(gb, 2);
448  s->predictors[i] = get_sbits(gb, x) * (1 << (10 - size));
449  }
450  }
451 
452  tfilter[0] = s->predictors[0] * 64;
453  for (i = 1; i < filter_order; i++) {
454  uint32_t *p1 = &tfilter[0];
455  uint32_t *p2 = &tfilter[i - 1];
456 
457  for (j = 0; j < (i + 1) / 2; j++) {
458  x = *p1 + ((int32_t)(s->predictors[i] * *p2 + 256) >> 9);
459  *p2 += (int32_t)(s->predictors[i] * *p1 + 256) >> 9;
460  *p1++ = x;
461  p2--;
462  }
463 
464  tfilter[i] = s->predictors[i] * 64;
465  }
466 
467  x = 1 << (32 - (15 - filter_quant));
468  y = 1 << ((15 - filter_quant) - 1);
469  for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) {
470  s->filter[j] = x - ((tfilter[i] + y) >> (15 - filter_quant));
471  s->filter[i] = x - ((tfilter[j] + y) >> (15 - filter_quant));
472  }
473 
474  if ((ret = decode_residues(s, &decoded[filter_order],
475  subframe_size - filter_order)) < 0)
476  return ret;
477 
478  for (i = 0; i < filter_order; i++)
479  s->residues[i] = *decoded++ >> dshift;
480 
481  y = FF_ARRAY_ELEMS(s->residues) - filter_order;
482  x = subframe_size - filter_order;
483  while (x > 0) {
484  int tmp = FFMIN(y, x);
485 
486  for (i = 0; i < tmp; i++) {
487  int v = 1 << (filter_quant - 1);
488 
489  if (filter_order & -16)
490  v += (unsigned)s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
491  filter_order & -16);
492  for (j = filter_order & -16; j < filter_order; j += 4) {
493  v += s->residues[i + j + 3] * (unsigned)s->filter[j + 3] +
494  s->residues[i + j + 2] * (unsigned)s->filter[j + 2] +
495  s->residues[i + j + 1] * (unsigned)s->filter[j + 1] +
496  s->residues[i + j ] * (unsigned)s->filter[j ];
497  }
498  v = (av_clip_intp2(v >> filter_quant, 13) * (1 << dshift)) - (unsigned)*decoded;
499  *decoded++ = v;
500  s->residues[filter_order + i] = v >> dshift;
501  }
502 
503  x -= tmp;
504  if (x > 0)
505  memcpy(s->residues, &s->residues[y], 2 * filter_order);
506  }
507 
508  emms_c();
509 
510  return 0;
511 }
512 
513 static int decode_channel(TAKDecContext *s, int chan)
514 {
515  AVCodecContext *avctx = s->avctx;
516  GetBitContext *gb = &s->gb;
517  int32_t *decoded = s->decoded[chan];
518  int left = s->nb_samples - 1;
519  int i = 0, ret, prev = 0;
520 
521  s->sample_shift[chan] = get_bits_esc4(gb);
522  if (s->sample_shift[chan] >= avctx->bits_per_raw_sample)
523  return AVERROR_INVALIDDATA;
524 
525  *decoded++ = get_sbits(gb, avctx->bits_per_raw_sample - s->sample_shift[chan]);
526  s->lpc_mode[chan] = get_bits(gb, 2);
527  s->nb_subframes = get_bits(gb, 3) + 1;
528 
529  if (s->nb_subframes > 1) {
530  if (get_bits_left(gb) < (s->nb_subframes - 1) * 6)
531  return AVERROR_INVALIDDATA;
532 
533  for (; i < s->nb_subframes - 1; i++) {
534  int v = get_bits(gb, 6);
535 
536  s->subframe_len[i] = (v - prev) * s->subframe_scale;
537  if (s->subframe_len[i] <= 0)
538  return AVERROR_INVALIDDATA;
539 
540  left -= s->subframe_len[i];
541  prev = v;
542  }
543 
544  if (left <= 0)
545  return AVERROR_INVALIDDATA;
546  }
547  s->subframe_len[i] = left;
548 
549  prev = 0;
550  for (i = 0; i < s->nb_subframes; i++) {
551  if ((ret = decode_subframe(s, decoded, s->subframe_len[i], prev)) < 0)
552  return ret;
553  decoded += s->subframe_len[i];
554  prev = s->subframe_len[i];
555  }
556 
557  return 0;
558 }
559 
560 static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
561 {
562  GetBitContext *gb = &s->gb;
563  int32_t *p1 = s->decoded[c1] + (s->dmode > 5);
564  int32_t *p2 = s->decoded[c2] + (s->dmode > 5);
565  int32_t bp1 = p1[0];
566  int32_t bp2 = p2[0];
567  int i;
568  int dshift, dfactor;
569 
570  length += s->dmode < 6;
571 
572  switch (s->dmode) {
573  case 1: /* left/side */
574  s->tdsp.decorrelate_ls(p1, p2, length);
575  break;
576  case 2: /* side/right */
577  s->tdsp.decorrelate_sr(p1, p2, length);
578  break;
579  case 3: /* side/mid */
580  s->tdsp.decorrelate_sm(p1, p2, length);
581  break;
582  case 4: /* side/left with scale factor */
583  FFSWAP(int32_t*, p1, p2);
584  FFSWAP(int32_t, bp1, bp2);
585  case 5: /* side/right with scale factor */
586  dshift = get_bits_esc4(gb);
587  dfactor = get_sbits(gb, 10);
588  s->tdsp.decorrelate_sf(p1, p2, length, dshift, dfactor);
589  break;
590  case 6:
591  FFSWAP(int32_t*, p1, p2);
592  case 7: {
593  int length2, order_half, filter_order, dval1, dval2;
594  int tmp, x, code_size;
595 
596  if (length < 256)
597  return AVERROR_INVALIDDATA;
598 
599  dshift = get_bits_esc4(gb);
600  filter_order = 8 << get_bits1(gb);
601  dval1 = get_bits1(gb);
602  dval2 = get_bits1(gb);
603 
604  for (i = 0; i < filter_order; i++) {
605  if (!(i & 3))
606  code_size = 14 - get_bits(gb, 3);
607  s->filter[i] = get_sbits(gb, code_size);
608  }
609 
610  order_half = filter_order / 2;
611  length2 = length - (filter_order - 1);
612 
613  /* decorrelate beginning samples */
614  if (dval1) {
615  for (i = 0; i < order_half; i++) {
616  int32_t a = p1[i];
617  int32_t b = p2[i];
618  p1[i] = a + b;
619  }
620  }
621 
622  /* decorrelate ending samples */
623  if (dval2) {
624  for (i = length2 + order_half; i < length; i++) {
625  int32_t a = p1[i];
626  int32_t b = p2[i];
627  p1[i] = a + b;
628  }
629  }
630 
631 
632  for (i = 0; i < filter_order; i++)
633  s->residues[i] = *p2++ >> dshift;
634 
635  p1 += order_half;
636  x = FF_ARRAY_ELEMS(s->residues) - filter_order;
637  for (; length2 > 0; length2 -= tmp) {
638  tmp = FFMIN(length2, x);
639 
640  for (i = 0; i < tmp - (tmp == length2); i++)
641  s->residues[filter_order + i] = *p2++ >> dshift;
642 
643  for (i = 0; i < tmp; i++) {
644  int v = 1 << 9;
645 
646  if (filter_order == 16) {
647  v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
648  filter_order);
649  } else {
650  v += s->residues[i + 7] * s->filter[7] +
651  s->residues[i + 6] * s->filter[6] +
652  s->residues[i + 5] * s->filter[5] +
653  s->residues[i + 4] * s->filter[4] +
654  s->residues[i + 3] * s->filter[3] +
655  s->residues[i + 2] * s->filter[2] +
656  s->residues[i + 1] * s->filter[1] +
657  s->residues[i ] * s->filter[0];
658  }
659 
660  v = av_clip_intp2(v >> 10, 13) * (1U << dshift) - *p1;
661  *p1++ = v;
662  }
663 
664  memmove(s->residues, &s->residues[tmp], 2 * filter_order);
665  }
666 
667  emms_c();
668  break;
669  }
670  }
671 
672  if (s->dmode > 0 && s->dmode < 6) {
673  p1[0] = bp1;
674  p2[0] = bp2;
675  }
676 
677  return 0;
678 }
679 
680 static int tak_decode_frame(AVCodecContext *avctx, void *data,
681  int *got_frame_ptr, AVPacket *pkt)
682 {
683  TAKDecContext *s = avctx->priv_data;
684  AVFrame *frame = data;
685  ThreadFrame tframe = { .f = data };
686  GetBitContext *gb = &s->gb;
687  int chan, i, ret, hsize;
688 
690  return AVERROR_INVALIDDATA;
691 
692  if ((ret = init_get_bits8(gb, pkt->data, pkt->size)) < 0)
693  return ret;
694 
695  if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0)
696  return ret;
697 
698  hsize = get_bits_count(gb) / 8;
700  if (ff_tak_check_crc(pkt->data, hsize)) {
701  av_log(avctx, AV_LOG_ERROR, "CRC error\n");
702  if (avctx->err_recognition & AV_EF_EXPLODE)
703  return AVERROR_INVALIDDATA;
704  }
705  }
706 
707  if (s->ti.codec != TAK_CODEC_MONO_STEREO &&
708  s->ti.codec != TAK_CODEC_MULTICHANNEL) {
709  avpriv_report_missing_feature(avctx, "TAK codec type %d", s->ti.codec);
710  return AVERROR_PATCHWELCOME;
711  }
712  if (s->ti.data_type) {
713  av_log(avctx, AV_LOG_ERROR,
714  "unsupported data type: %d\n", s->ti.data_type);
715  return AVERROR_INVALIDDATA;
716  }
717  if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) {
718  av_log(avctx, AV_LOG_ERROR,
719  "invalid number of channels: %d\n", s->ti.channels);
720  return AVERROR_INVALIDDATA;
721  }
722  if (s->ti.channels > 6) {
723  av_log(avctx, AV_LOG_ERROR,
724  "unsupported number of channels: %d\n", s->ti.channels);
725  return AVERROR_INVALIDDATA;
726  }
727 
728  if (s->ti.frame_samples <= 0) {
729  av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n");
730  return AVERROR_INVALIDDATA;
731  }
732 
733  avctx->bits_per_raw_sample = s->ti.bps;
734  if ((ret = set_bps_params(avctx)) < 0)
735  return ret;
736  if (s->ti.sample_rate != avctx->sample_rate) {
737  avctx->sample_rate = s->ti.sample_rate;
738  set_sample_rate_params(avctx);
739  }
740  if (s->ti.ch_layout)
741  avctx->channel_layout = s->ti.ch_layout;
742  avctx->channels = s->ti.channels;
743 
744  s->nb_samples = s->ti.last_frame_samples ? s->ti.last_frame_samples
745  : s->ti.frame_samples;
746 
747  frame->nb_samples = s->nb_samples;
748  if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
749  return ret;
750  ff_thread_finish_setup(avctx);
751 
752  if (avctx->bits_per_raw_sample <= 16) {
753  int buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
754  s->nb_samples,
755  AV_SAMPLE_FMT_S32P, 0);
756  if (buf_size < 0)
757  return buf_size;
758  av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size);
759  if (!s->decode_buffer)
760  return AVERROR(ENOMEM);
761  ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL,
762  s->decode_buffer, avctx->channels,
763  s->nb_samples, AV_SAMPLE_FMT_S32P, 0);
764  if (ret < 0)
765  return ret;
766  } else {
767  for (chan = 0; chan < avctx->channels; chan++)
768  s->decoded[chan] = (int32_t *)frame->extended_data[chan];
769  }
770 
771  if (s->nb_samples < 16) {
772  for (chan = 0; chan < avctx->channels; chan++) {
773  int32_t *decoded = s->decoded[chan];
774  for (i = 0; i < s->nb_samples; i++)
775  decoded[i] = get_sbits(gb, avctx->bits_per_raw_sample);
776  }
777  } else {
778  if (s->ti.codec == TAK_CODEC_MONO_STEREO) {
779  for (chan = 0; chan < avctx->channels; chan++)
780  if (ret = decode_channel(s, chan))
781  return ret;
782 
783  if (avctx->channels == 2) {
784  s->nb_subframes = get_bits(gb, 1) + 1;
785  if (s->nb_subframes > 1) {
786  s->subframe_len[1] = get_bits(gb, 6);
787  }
788 
789  s->dmode = get_bits(gb, 3);
790  if (ret = decorrelate(s, 0, 1, s->nb_samples - 1))
791  return ret;
792  }
793  } else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) {
794  if (get_bits1(gb)) {
795  int ch_mask = 0;
796 
797  chan = get_bits(gb, 4) + 1;
798  if (chan > avctx->channels)
799  return AVERROR_INVALIDDATA;
800 
801  for (i = 0; i < chan; i++) {
802  int nbit = get_bits(gb, 4);
803 
804  if (nbit >= avctx->channels)
805  return AVERROR_INVALIDDATA;
806 
807  if (ch_mask & 1 << nbit)
808  return AVERROR_INVALIDDATA;
809 
810  s->mcdparams[i].present = get_bits1(gb);
811  if (s->mcdparams[i].present) {
812  s->mcdparams[i].index = get_bits(gb, 2);
813  s->mcdparams[i].chan2 = get_bits(gb, 4);
814  if (s->mcdparams[i].chan2 >= avctx->channels) {
815  av_log(avctx, AV_LOG_ERROR,
816  "invalid channel 2 (%d) for %d channel(s)\n",
817  s->mcdparams[i].chan2, avctx->channels);
818  return AVERROR_INVALIDDATA;
819  }
820  if (s->mcdparams[i].index == 1) {
821  if ((nbit == s->mcdparams[i].chan2) ||
822  (ch_mask & 1 << s->mcdparams[i].chan2))
823  return AVERROR_INVALIDDATA;
824 
825  ch_mask |= 1 << s->mcdparams[i].chan2;
826  } else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) {
827  return AVERROR_INVALIDDATA;
828  }
829  }
830  s->mcdparams[i].chan1 = nbit;
831 
832  ch_mask |= 1 << nbit;
833  }
834  } else {
835  chan = avctx->channels;
836  for (i = 0; i < chan; i++) {
837  s->mcdparams[i].present = 0;
838  s->mcdparams[i].chan1 = i;
839  }
840  }
841 
842  for (i = 0; i < chan; i++) {
843  if (s->mcdparams[i].present && s->mcdparams[i].index == 1)
844  if (ret = decode_channel(s, s->mcdparams[i].chan2))
845  return ret;
846 
847  if (ret = decode_channel(s, s->mcdparams[i].chan1))
848  return ret;
849 
850  if (s->mcdparams[i].present) {
851  s->dmode = mc_dmodes[s->mcdparams[i].index];
852  if (ret = decorrelate(s,
853  s->mcdparams[i].chan2,
854  s->mcdparams[i].chan1,
855  s->nb_samples - 1))
856  return ret;
857  }
858  }
859  }
860 
861  for (chan = 0; chan < avctx->channels; chan++) {
862  int32_t *decoded = s->decoded[chan];
863 
864  if (s->lpc_mode[chan])
865  decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples);
866 
867  if (s->sample_shift[chan] > 0)
868  for (i = 0; i < s->nb_samples; i++)
869  decoded[i] *= 1U << s->sample_shift[chan];
870  }
871  }
872 
873  align_get_bits(gb);
874  skip_bits(gb, 24);
875  if (get_bits_left(gb) < 0)
876  av_log(avctx, AV_LOG_DEBUG, "overread\n");
877  else if (get_bits_left(gb) > 0)
878  av_log(avctx, AV_LOG_DEBUG, "underread\n");
879 
881  if (ff_tak_check_crc(pkt->data + hsize,
882  get_bits_count(gb) / 8 - hsize)) {
883  av_log(avctx, AV_LOG_ERROR, "CRC error\n");
884  if (avctx->err_recognition & AV_EF_EXPLODE)
885  return AVERROR_INVALIDDATA;
886  }
887  }
888 
889  /* convert to output buffer */
890  switch (avctx->sample_fmt) {
891  case AV_SAMPLE_FMT_U8P:
892  for (chan = 0; chan < avctx->channels; chan++) {
893  uint8_t *samples = (uint8_t *)frame->extended_data[chan];
894  int32_t *decoded = s->decoded[chan];
895  for (i = 0; i < s->nb_samples; i++)
896  samples[i] = decoded[i] + 0x80U;
897  }
898  break;
899  case AV_SAMPLE_FMT_S16P:
900  for (chan = 0; chan < avctx->channels; chan++) {
901  int16_t *samples = (int16_t *)frame->extended_data[chan];
902  int32_t *decoded = s->decoded[chan];
903  for (i = 0; i < s->nb_samples; i++)
904  samples[i] = decoded[i];
905  }
906  break;
907  case AV_SAMPLE_FMT_S32P:
908  for (chan = 0; chan < avctx->channels; chan++) {
909  int32_t *samples = (int32_t *)frame->extended_data[chan];
910  for (i = 0; i < s->nb_samples; i++)
911  samples[i] *= 1U << 8;
912  }
913  break;
914  }
915 
916  *got_frame_ptr = 1;
917 
918  return pkt->size;
919 }
920 
921 #if HAVE_THREADS
922 static int update_thread_context(AVCodecContext *dst,
923  const AVCodecContext *src)
924 {
925  TAKDecContext *tsrc = src->priv_data;
926  TAKDecContext *tdst = dst->priv_data;
927 
928  if (dst == src)
929  return 0;
930  memcpy(&tdst->ti, &tsrc->ti, sizeof(TAKStreamInfo));
931  return 0;
932 }
933 #endif
934 
936 {
937  TAKDecContext *s = avctx->priv_data;
938 
939  av_freep(&s->decode_buffer);
940 
941  return 0;
942 }
943 
945  .name = "tak",
946  .long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
947  .type = AVMEDIA_TYPE_AUDIO,
948  .id = AV_CODEC_ID_TAK,
949  .priv_data_size = sizeof(TAKDecContext),
951  .close = tak_decode_close,
953  .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
955  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
959 };
#define av_cold
Definition: attributes.h:88
uint8_t
int32_t
Libavcodec external API header.
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data,...
Definition: avcodec.h:1657
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:1664
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1660
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
#define s(width, name)
Definition: cbs_vp9.c:257
#define av_clip_intp2
Definition: common.h:143
#define FFSWAP(type, a, b)
Definition: common.h:108
#define FFMIN(a, b)
Definition: common.h:105
#define NULL
Definition: coverity.c:32
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:359
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:693
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
Definition: codec.h:104
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:108
@ AV_CODEC_ID_TAK
Definition: codec_id.h:486
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:502
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:117
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Get the required buffer size for the given audio parameters.
Definition: samplefmt.c:119
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
@ AV_SAMPLE_FMT_U8P
unsigned 8 bits, planar
Definition: samplefmt.h:66
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, const uint8_t *buf, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Fill plane data pointers and linesize for samples with sample format sample_fmt.
Definition: samplefmt.c:151
for(j=16;j >0;--j)
int i
Definition: input.c:407
av_cold void ff_audiodsp_init(AudioDSPContext *c)
Definition: audiodsp.c:106
static int get_bits_esc4(GetBitContext *gb)
Definition: takdec.c:378
static const uint16_t predictor_sizes[]
Definition: takdec.c:82
static int decode_channel(TAKDecContext *s, int chan)
Definition: takdec.c:513
static const int8_t mc_dmodes[]
Definition: takdec.c:80
static int decode_subframe(TAKDecContext *s, int32_t *decoded, int subframe_size, int prev_subframe_size)
Definition: takdec.c:386
static av_cold int tak_decode_close(AVCodecContext *avctx)
Definition: takdec.c:935
static const struct CParam xcodes[50]
AVCodec ff_tak_decoder
Definition: takdec.c:944
static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
Definition: takdec.c:560
static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
Definition: takdec.c:299
static void decode_lpc(int32_t *coeffs, int mode, int length)
Definition: takdec.c:199
static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
Definition: takdec.c:255
#define MAX_SUBFRAMES
max number of subframes per channel
Definition: takdec.c:41
static av_cold int tak_decode_init(AVCodecContext *avctx)
Definition: takdec.c:184
static int set_bps_params(AVCodecContext *avctx)
Definition: takdec.c:145
static void set_sample_rate_params(AVCodecContext *avctx)
Definition: takdec.c:166
static int tak_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *pkt)
Definition: takdec.c:680
#define MAX_PREDICTORS
Definition: takdec.c:42
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:156
#define emms_c()
Definition: internal.h:54
#define FFALIGN(x, a)
Definition: macros.h:48
static const uint64_t c2
Definition: murmur3.c:52
static const uint64_t c1
Definition: murmur3.c:51
const char data[16]
Definition: mxf.c:142
FF_ENABLE_DEPRECATION_WARNINGS int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define a4
Definition: regdef.h:50
#define a3
Definition: regdef.h:49
#define a5
Definition: regdef.h:51
#define a2
Definition: regdef.h:48
#define a1
Definition: regdef.h:47
#define FF_ARRAY_ELEMS(a)
static int shift(int a, int b)
Definition: sonic.c:82
const uint8_t * code
Definition: spdifenc.c:413
main external API structure.
Definition: avcodec.h:536
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1204
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1744
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1751
int sample_rate
samples per second
Definition: avcodec.h:1196
int channels
number of audio channels
Definition: avcodec.h:1197
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1247
void * priv_data
Definition: avcodec.h:563
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1649
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:384
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:365
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Definition: takdec.c:86
int scale
Definition: takdec.c:89
int bias
Definition: takdec.c:91
int init
Definition: takdec.c:87
int aescape
Definition: takdec.c:90
int escape
Definition: takdec.c:88
int8_t index
index into array of decorrelation types
Definition: takdec.c:46
int8_t chan2
Definition: takdec.c:48
int8_t chan1
Definition: takdec.c:47
int8_t present
decorrelation parameter availability for this channel
Definition: takdec.c:45
int8_t dmode
channel decorrelation type in the current frame
Definition: takdec.c:71
int16_t filter[MAX_PREDICTORS]
Definition: takdec.c:76
int16_t subframe_len[MAX_SUBFRAMES]
subframe length in samples
Definition: takdec.c:68
int8_t coding_mode[128]
Definition: takdec.c:75
uint8_t * decode_buffer
Definition: takdec.c:60
int subframe_scale
Definition: takdec.c:69
int uval
Definition: takdec.c:58
int16_t predictors[MAX_PREDICTORS]
Definition: takdec.c:66
int8_t lpc_mode[TAK_MAX_CHANNELS]
Definition: takdec.c:64
GetBitContext gb
bitstream reader initialized to start at the current frame
Definition: takdec.c:56
TAKDSPContext tdsp
Definition: takdec.c:54
int nb_subframes
number of subframes in the current frame
Definition: takdec.c:67
MCDParam mcdparams[TAK_MAX_CHANNELS]
multichannel decorrelation parameters
Definition: takdec.c:73
int32_t * decoded[TAK_MAX_CHANNELS]
decoded samples for each channel
Definition: takdec.c:62
unsigned int decode_buffer_size
Definition: takdec.c:61
int nb_samples
number of samples in the current frame
Definition: takdec.c:59
AVCodecContext * avctx
parent AVCodecContext
Definition: takdec.c:52
TAKStreamInfo ti
Definition: takdec.c:55
int8_t sample_shift[TAK_MAX_CHANNELS]
shift applied to every sample in the channel
Definition: takdec.c:65
AudioDSPContext adsp
Definition: takdec.c:53
int16_t residues[544]
Definition: takdec.c:77
AVFrame * f
Definition: thread.h:35
#define av_freep(p)
#define av_log(a,...)
int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size)
Definition: tak.c:77
int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb, TAKStreamInfo *ti, int log_level_offset)
Validate and decode a frame header.
Definition: tak.c:141
TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions.
#define TAK_MAX_CHANNELS
Definition: tak.h:64
#define TAK_MIN_FRAME_HEADER_BYTES
Definition: tak.h:97
@ TAK_CODEC_MONO_STEREO
Definition: tak.h:100
@ TAK_CODEC_MULTICHANNEL
Definition: tak.h:101
av_cold void ff_takdsp_init(TAKDSPContext *c)
Definition: takdsp.c:73
static uint8_t tmp[11]
Definition: aes_ctr.c:27
#define src
Definition: vp8dsp.c:255
AVPacket * pkt
Definition: movenc.c:59
int size
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:46
const char * b
Definition: vf_curves.c:118
if(ret< 0)
Definition: vf_mcdeint.c:282
int len
static double c[64]