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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/samplefmt.h"
30 
31 #define BITSTREAM_READER_LE
32 #include "audiodsp.h"
33 #include "thread.h"
34 #include "avcodec.h"
35 #include "internal.h"
36 #include "unary.h"
37 #include "tak.h"
38 #include "takdsp.h"
39 
40 #define MAX_SUBFRAMES 8 ///< max number of subframes per channel
41 #define MAX_PREDICTORS 256
42 
43 typedef struct MCDParam {
44  int8_t present; ///< decorrelation parameter availability for this channel
45  int8_t index; ///< index into array of decorrelation types
46  int8_t chan1;
47  int8_t chan2;
48 } MCDParam;
49 
50 typedef struct TAKDecContext {
51  AVCodecContext *avctx; ///< parent AVCodecContext
55  GetBitContext gb; ///< bitstream reader initialized to start at the current frame
56 
57  int uval;
58  int nb_samples; ///< number of samples in the current frame
60  unsigned int decode_buffer_size;
61  int32_t *decoded[TAK_MAX_CHANNELS]; ///< decoded samples for each channel
62 
64  int8_t sample_shift[TAK_MAX_CHANNELS]; ///< shift applied to every sample in the channel
66  int nb_subframes; ///< number of subframes in the current frame
67  int16_t subframe_len[MAX_SUBFRAMES]; ///< subframe length in samples
69 
70  int8_t dmode; ///< channel decorrelation type in the current frame
71 
72  MCDParam mcdparams[TAK_MAX_CHANNELS]; ///< multichannel decorrelation parameters
73 
74  int8_t coding_mode[128];
76  DECLARE_ALIGNED(16, int16_t, residues)[544];
78 
79 static const int8_t mc_dmodes[] = { 1, 3, 4, 6, };
80 
81 static const uint16_t predictor_sizes[] = {
82  4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0,
83 };
84 
85 static const struct CParam {
86  int init;
87  int escape;
88  int scale;
89  int aescape;
90  int bias;
91 } xcodes[50] = {
92  { 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 },
93  { 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 },
94  { 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D },
95  { 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 },
96  { 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 },
97  { 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 },
98  { 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 },
99  { 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 },
100  { 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 },
101  { 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 },
102  { 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 },
103  { 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 },
104  { 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 },
105  { 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 },
106  { 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 },
107  { 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 },
108  { 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 },
109  { 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 },
110  { 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 },
111  { 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 },
112  { 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 },
113  { 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 },
114  { 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 },
115  { 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 },
116  { 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 },
117  { 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 },
118  { 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 },
119  { 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 },
120  { 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 },
121  { 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 },
122  { 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 },
123  { 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 },
124  { 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 },
125  { 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 },
126  { 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 },
127  { 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 },
128  { 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 },
129  { 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 },
130  { 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 },
131  { 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 },
132  { 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 },
133  { 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 },
134  { 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 },
135  { 0x17, 0x0300000, 0x0300000, 0x0D00000, 0x1800000 },
136  { 0x18, 0x0B00000, 0x0400000, 0x1C00000, 0x1900000 },
137  { 0x18, 0x0600000, 0x0600000, 0x1A00000, 0x3000000 },
138  { 0x19, 0x1600000, 0x0800000, 0x3800000, 0x3200000 },
139  { 0x19, 0x0C00000, 0x0C00000, 0x3400000, 0x6000000 },
140  { 0x1A, 0x2C00000, 0x1000000, 0x7000000, 0x6400000 },
141  { 0x1A, 0x1800000, 0x1800000, 0x6800000, 0xC000000 },
142 };
143 
144 static int set_bps_params(AVCodecContext *avctx)
145 {
146  switch (avctx->bits_per_raw_sample) {
147  case 8:
148  avctx->sample_fmt = AV_SAMPLE_FMT_U8P;
149  break;
150  case 16:
152  break;
153  case 24:
155  break;
156  default:
157  av_log(avctx, AV_LOG_ERROR, "invalid/unsupported bits per sample: %d\n",
158  avctx->bits_per_raw_sample);
159  return AVERROR_INVALIDDATA;
160  }
161 
162  return 0;
163 }
164 
166 {
167  TAKDecContext *s = avctx->priv_data;
168  int shift;
169 
170  if (avctx->sample_rate < 11025) {
171  shift = 3;
172  } else if (avctx->sample_rate < 22050) {
173  shift = 2;
174  } else if (avctx->sample_rate < 44100) {
175  shift = 1;
176  } else {
177  shift = 0;
178  }
179  s->uval = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << shift;
180  s->subframe_scale = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << 1;
181 }
182 
184 {
185  TAKDecContext *s = avctx->priv_data;
186 
187  ff_audiodsp_init(&s->adsp);
188  ff_takdsp_init(&s->tdsp);
189 
190  s->avctx = avctx;
192 
193  set_sample_rate_params(avctx);
194 
195  return set_bps_params(avctx);
196 }
197 
198 static void decode_lpc(int32_t *coeffs, int mode, int length)
199 {
200  int i;
201 
202  if (length < 2)
203  return;
204 
205  if (mode == 1) {
206  int a1 = *coeffs++;
207  for (i = 0; i < length - 1 >> 1; i++) {
208  *coeffs += a1;
209  coeffs[1] += *coeffs;
210  a1 = coeffs[1];
211  coeffs += 2;
212  }
213  if (length - 1 & 1)
214  *coeffs += a1;
215  } else if (mode == 2) {
216  int a1 = coeffs[1];
217  int a2 = a1 + *coeffs;
218  coeffs[1] = a2;
219  if (length > 2) {
220  coeffs += 2;
221  for (i = 0; i < length - 2 >> 1; i++) {
222  int a3 = *coeffs + a1;
223  int a4 = a3 + a2;
224  *coeffs = a4;
225  a1 = coeffs[1] + a3;
226  a2 = a1 + a4;
227  coeffs[1] = a2;
228  coeffs += 2;
229  }
230  if (length & 1)
231  *coeffs += a1 + a2;
232  }
233  } else if (mode == 3) {
234  int a1 = coeffs[1];
235  int a2 = a1 + *coeffs;
236  coeffs[1] = a2;
237  if (length > 2) {
238  int a3 = coeffs[2];
239  int a4 = a3 + a1;
240  int a5 = a4 + a2;
241  coeffs[2] = a5;
242  coeffs += 3;
243  for (i = 0; i < length - 3; i++) {
244  a3 += *coeffs;
245  a4 += a3;
246  a5 += a4;
247  *coeffs = a5;
248  coeffs++;
249  }
250  }
251  }
252 }
253 
254 static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
255 {
256  struct CParam code;
257  GetBitContext *gb = &s->gb;
258  int i;
259 
260  if (!mode) {
261  memset(decoded, 0, len * sizeof(*decoded));
262  return 0;
263  }
264 
265  if (mode > FF_ARRAY_ELEMS(xcodes))
266  return AVERROR_INVALIDDATA;
267  code = xcodes[mode - 1];
268 
269  for (i = 0; i < len; i++) {
270  int x = get_bits_long(gb, code.init);
271  if (x >= code.escape && get_bits1(gb)) {
272  x |= 1 << code.init;
273  if (x >= code.aescape) {
274  int scale = get_unary(gb, 1, 9);
275  if (scale == 9) {
276  int scale_bits = get_bits(gb, 3);
277  if (scale_bits > 0) {
278  if (scale_bits == 7) {
279  scale_bits += get_bits(gb, 5);
280  if (scale_bits > 29)
281  return AVERROR_INVALIDDATA;
282  }
283  scale = get_bits_long(gb, scale_bits) + 1;
284  x += code.scale * scale;
285  }
286  x += code.bias;
287  } else
288  x += code.scale * scale - code.escape;
289  } else
290  x -= code.escape;
291  }
292  decoded[i] = (x >> 1) ^ -(x & 1);
293  }
294 
295  return 0;
296 }
297 
298 static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
299 {
300  GetBitContext *gb = &s->gb;
301  int i, mode, ret;
302 
303  if (length > s->nb_samples)
304  return AVERROR_INVALIDDATA;
305 
306  if (get_bits1(gb)) {
307  int wlength, rval;
308 
309  wlength = length / s->uval;
310 
311  rval = length - (wlength * s->uval);
312 
313  if (rval < s->uval / 2)
314  rval += s->uval;
315  else
316  wlength++;
317 
318  if (wlength <= 1 || wlength > 128)
319  return AVERROR_INVALIDDATA;
320 
321  s->coding_mode[0] = mode = get_bits(gb, 6);
322 
323  for (i = 1; i < wlength; i++) {
324  int c = get_unary(gb, 1, 6);
325 
326  switch (c) {
327  case 6:
328  mode = get_bits(gb, 6);
329  break;
330  case 5:
331  case 4:
332  case 3: {
333  /* mode += sign ? (1 - c) : (c - 1) */
334  int sign = get_bits1(gb);
335  mode += (-sign ^ (c - 1)) + sign;
336  break;
337  }
338  case 2:
339  mode++;
340  break;
341  case 1:
342  mode--;
343  break;
344  }
345  s->coding_mode[i] = mode;
346  }
347 
348  i = 0;
349  while (i < wlength) {
350  int len = 0;
351 
352  mode = s->coding_mode[i];
353  do {
354  if (i >= wlength - 1)
355  len += rval;
356  else
357  len += s->uval;
358  i++;
359 
360  if (i == wlength)
361  break;
362  } while (s->coding_mode[i] == mode);
363 
364  if ((ret = decode_segment(s, mode, decoded, len)) < 0)
365  return ret;
366  decoded += len;
367  }
368  } else {
369  mode = get_bits(gb, 6);
370  if ((ret = decode_segment(s, mode, decoded, length)) < 0)
371  return ret;
372  }
373 
374  return 0;
375 }
376 
378 {
379  if (get_bits1(gb))
380  return get_bits(gb, 4) + 1;
381  else
382  return 0;
383 }
384 
385 static int decode_subframe(TAKDecContext *s, int32_t *decoded,
386  int subframe_size, int prev_subframe_size)
387 {
388  GetBitContext *gb = &s->gb;
389  int x, y, i, j, ret = 0;
390  int dshift, size, filter_quant, filter_order;
391  int tfilter[MAX_PREDICTORS];
392 
393  if (!get_bits1(gb))
394  return decode_residues(s, decoded, subframe_size);
395 
396  filter_order = predictor_sizes[get_bits(gb, 4)];
397 
398  if (prev_subframe_size > 0 && get_bits1(gb)) {
399  if (filter_order > prev_subframe_size)
400  return AVERROR_INVALIDDATA;
401 
402  decoded -= filter_order;
403  subframe_size += filter_order;
404 
405  if (filter_order > subframe_size)
406  return AVERROR_INVALIDDATA;
407  } else {
408  int lpc_mode;
409 
410  if (filter_order > subframe_size)
411  return AVERROR_INVALIDDATA;
412 
413  lpc_mode = get_bits(gb, 2);
414  if (lpc_mode > 2)
415  return AVERROR_INVALIDDATA;
416 
417  if ((ret = decode_residues(s, decoded, filter_order)) < 0)
418  return ret;
419 
420  if (lpc_mode)
421  decode_lpc(decoded, lpc_mode, filter_order);
422  }
423 
424  dshift = get_bits_esc4(gb);
425  size = get_bits1(gb) + 6;
426 
427  filter_quant = 10;
428  if (get_bits1(gb)) {
429  filter_quant -= get_bits(gb, 3) + 1;
430  if (filter_quant < 3)
431  return AVERROR_INVALIDDATA;
432  }
433 
434  s->predictors[0] = get_sbits(gb, 10);
435  s->predictors[1] = get_sbits(gb, 10);
436  s->predictors[2] = get_sbits(gb, size) << (10 - size);
437  s->predictors[3] = get_sbits(gb, size) << (10 - size);
438  if (filter_order > 4) {
439  int tmp = size - get_bits1(gb);
440 
441  for (i = 4; i < filter_order; i++) {
442  if (!(i & 3))
443  x = tmp - get_bits(gb, 2);
444  s->predictors[i] = get_sbits(gb, x) << (10 - size);
445  }
446  }
447 
448  tfilter[0] = s->predictors[0] << 6;
449  for (i = 1; i < filter_order; i++) {
450  int32_t *p1 = &tfilter[0];
451  int32_t *p2 = &tfilter[i - 1];
452 
453  for (j = 0; j < (i + 1) / 2; j++) {
454  x = *p1 + (s->predictors[i] * *p2 + 256 >> 9);
455  *p2 += s->predictors[i] * *p1 + 256 >> 9;
456  *p1++ = x;
457  p2--;
458  }
459 
460  tfilter[i] = s->predictors[i] << 6;
461  }
462 
463  x = 1 << (32 - (15 - filter_quant));
464  y = 1 << ((15 - filter_quant) - 1);
465  for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) {
466  s->filter[j] = x - ((tfilter[i] + y) >> (15 - filter_quant));
467  s->filter[i] = x - ((tfilter[j] + y) >> (15 - filter_quant));
468  }
469 
470  if ((ret = decode_residues(s, &decoded[filter_order],
471  subframe_size - filter_order)) < 0)
472  return ret;
473 
474  for (i = 0; i < filter_order; i++)
475  s->residues[i] = *decoded++ >> dshift;
476 
477  y = FF_ARRAY_ELEMS(s->residues) - filter_order;
478  x = subframe_size - filter_order;
479  while (x > 0) {
480  int tmp = FFMIN(y, x);
481 
482  for (i = 0; i < tmp; i++) {
483  int v = 1 << (filter_quant - 1);
484 
485  if (filter_order & -16)
486  v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
487  filter_order & -16);
488  for (j = filter_order & -16; j < filter_order; j += 4) {
489  v += s->residues[i + j + 3] * s->filter[j + 3] +
490  s->residues[i + j + 2] * s->filter[j + 2] +
491  s->residues[i + j + 1] * s->filter[j + 1] +
492  s->residues[i + j ] * s->filter[j ];
493  }
494  v = (av_clip_intp2(v >> filter_quant, 13) << dshift) - *decoded;
495  *decoded++ = v;
496  s->residues[filter_order + i] = v >> dshift;
497  }
498 
499  x -= tmp;
500  if (x > 0)
501  memcpy(s->residues, &s->residues[y], 2 * filter_order);
502  }
503 
504  emms_c();
505 
506  return 0;
507 }
508 
509 static int decode_channel(TAKDecContext *s, int chan)
510 {
511  AVCodecContext *avctx = s->avctx;
512  GetBitContext *gb = &s->gb;
513  int32_t *decoded = s->decoded[chan];
514  int left = s->nb_samples - 1;
515  int i = 0, ret, prev = 0;
516 
517  s->sample_shift[chan] = get_bits_esc4(gb);
518  if (s->sample_shift[chan] >= avctx->bits_per_raw_sample)
519  return AVERROR_INVALIDDATA;
520 
521  *decoded++ = get_sbits(gb, avctx->bits_per_raw_sample - s->sample_shift[chan]);
522  s->lpc_mode[chan] = get_bits(gb, 2);
523  s->nb_subframes = get_bits(gb, 3) + 1;
524 
525  if (s->nb_subframes > 1) {
526  if (get_bits_left(gb) < (s->nb_subframes - 1) * 6)
527  return AVERROR_INVALIDDATA;
528 
529  for (; i < s->nb_subframes - 1; i++) {
530  int v = get_bits(gb, 6);
531 
532  s->subframe_len[i] = (v - prev) * s->subframe_scale;
533  if (s->subframe_len[i] <= 0)
534  return AVERROR_INVALIDDATA;
535 
536  left -= s->subframe_len[i];
537  prev = v;
538  }
539 
540  if (left <= 0)
541  return AVERROR_INVALIDDATA;
542  }
543  s->subframe_len[i] = left;
544 
545  prev = 0;
546  for (i = 0; i < s->nb_subframes; i++) {
547  if ((ret = decode_subframe(s, decoded, s->subframe_len[i], prev)) < 0)
548  return ret;
549  decoded += s->subframe_len[i];
550  prev = s->subframe_len[i];
551  }
552 
553  return 0;
554 }
555 
556 static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
557 {
558  GetBitContext *gb = &s->gb;
559  int32_t *p1 = s->decoded[c1] + (s->dmode > 5);
560  int32_t *p2 = s->decoded[c2] + (s->dmode > 5);
561  int32_t bp1 = p1[0];
562  int32_t bp2 = p2[0];
563  int i;
564  int dshift, dfactor;
565 
566  length += s->dmode < 6;
567 
568  switch (s->dmode) {
569  case 1: /* left/side */
570  s->tdsp.decorrelate_ls(p1, p2, length);
571  break;
572  case 2: /* side/right */
573  s->tdsp.decorrelate_sr(p1, p2, length);
574  break;
575  case 3: /* side/mid */
576  s->tdsp.decorrelate_sm(p1, p2, length);
577  break;
578  case 4: /* side/left with scale factor */
579  FFSWAP(int32_t*, p1, p2);
580  FFSWAP(int32_t, bp1, bp2);
581  case 5: /* side/right with scale factor */
582  dshift = get_bits_esc4(gb);
583  dfactor = get_sbits(gb, 10);
584  s->tdsp.decorrelate_sf(p1, p2, length, dshift, dfactor);
585  break;
586  case 6:
587  FFSWAP(int32_t*, p1, p2);
588  case 7: {
589  int length2, order_half, filter_order, dval1, dval2;
590  int tmp, x, code_size;
591 
592  if (length < 256)
593  return AVERROR_INVALIDDATA;
594 
595  dshift = get_bits_esc4(gb);
596  filter_order = 8 << get_bits1(gb);
597  dval1 = get_bits1(gb);
598  dval2 = get_bits1(gb);
599 
600  for (i = 0; i < filter_order; i++) {
601  if (!(i & 3))
602  code_size = 14 - get_bits(gb, 3);
603  s->filter[i] = get_sbits(gb, code_size);
604  }
605 
606  order_half = filter_order / 2;
607  length2 = length - (filter_order - 1);
608 
609  /* decorrelate beginning samples */
610  if (dval1) {
611  for (i = 0; i < order_half; i++) {
612  int32_t a = p1[i];
613  int32_t b = p2[i];
614  p1[i] = a + b;
615  }
616  }
617 
618  /* decorrelate ending samples */
619  if (dval2) {
620  for (i = length2 + order_half; i < length; i++) {
621  int32_t a = p1[i];
622  int32_t b = p2[i];
623  p1[i] = a + b;
624  }
625  }
626 
627 
628  for (i = 0; i < filter_order; i++)
629  s->residues[i] = *p2++ >> dshift;
630 
631  p1 += order_half;
632  x = FF_ARRAY_ELEMS(s->residues) - filter_order;
633  for (; length2 > 0; length2 -= tmp) {
634  tmp = FFMIN(length2, x);
635 
636  for (i = 0; i < tmp - (tmp == length2); i++)
637  s->residues[filter_order + i] = *p2++ >> dshift;
638 
639  for (i = 0; i < tmp; i++) {
640  int v = 1 << 9;
641 
642  if (filter_order == 16) {
643  v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
644  filter_order);
645  } else {
646  v += s->residues[i + 7] * s->filter[7] +
647  s->residues[i + 6] * s->filter[6] +
648  s->residues[i + 5] * s->filter[5] +
649  s->residues[i + 4] * s->filter[4] +
650  s->residues[i + 3] * s->filter[3] +
651  s->residues[i + 2] * s->filter[2] +
652  s->residues[i + 1] * s->filter[1] +
653  s->residues[i ] * s->filter[0];
654  }
655 
656  v = (av_clip_intp2(v >> 10, 13) << dshift) - *p1;
657  *p1++ = v;
658  }
659 
660  memmove(s->residues, &s->residues[tmp], 2 * filter_order);
661  }
662 
663  emms_c();
664  break;
665  }
666  }
667 
668  if (s->dmode > 0 && s->dmode < 6) {
669  p1[0] = bp1;
670  p2[0] = bp2;
671  }
672 
673  return 0;
674 }
675 
676 static int tak_decode_frame(AVCodecContext *avctx, void *data,
677  int *got_frame_ptr, AVPacket *pkt)
678 {
679  TAKDecContext *s = avctx->priv_data;
680  AVFrame *frame = data;
681  ThreadFrame tframe = { .f = data };
682  GetBitContext *gb = &s->gb;
683  int chan, i, ret, hsize;
684 
685  if (pkt->size < TAK_MIN_FRAME_HEADER_BYTES)
686  return AVERROR_INVALIDDATA;
687 
688  if ((ret = init_get_bits8(gb, pkt->data, pkt->size)) < 0)
689  return ret;
690 
691  if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0)
692  return ret;
693 
694  hsize = get_bits_count(gb) / 8;
696  if (ff_tak_check_crc(pkt->data, hsize)) {
697  av_log(avctx, AV_LOG_ERROR, "CRC error\n");
698  if (avctx->err_recognition & AV_EF_EXPLODE)
699  return AVERROR_INVALIDDATA;
700  }
701  }
702 
703  if (s->ti.codec != TAK_CODEC_MONO_STEREO &&
705  av_log(avctx, AV_LOG_ERROR, "unsupported codec: %d\n", s->ti.codec);
706  return AVERROR_PATCHWELCOME;
707  }
708  if (s->ti.data_type) {
709  av_log(avctx, AV_LOG_ERROR,
710  "unsupported data type: %d\n", s->ti.data_type);
711  return AVERROR_INVALIDDATA;
712  }
713  if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) {
714  av_log(avctx, AV_LOG_ERROR,
715  "invalid number of channels: %d\n", s->ti.channels);
716  return AVERROR_INVALIDDATA;
717  }
718  if (s->ti.channels > 6) {
719  av_log(avctx, AV_LOG_ERROR,
720  "unsupported number of channels: %d\n", s->ti.channels);
721  return AVERROR_INVALIDDATA;
722  }
723 
724  if (s->ti.frame_samples <= 0) {
725  av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n");
726  return AVERROR_INVALIDDATA;
727  }
728 
729  avctx->bits_per_raw_sample = s->ti.bps;
730  if ((ret = set_bps_params(avctx)) < 0)
731  return ret;
732  if (s->ti.sample_rate != avctx->sample_rate) {
733  avctx->sample_rate = s->ti.sample_rate;
734  set_sample_rate_params(avctx);
735  }
736  if (s->ti.ch_layout)
737  avctx->channel_layout = s->ti.ch_layout;
738  avctx->channels = s->ti.channels;
739 
741  : s->ti.frame_samples;
742 
743  frame->nb_samples = s->nb_samples;
744  if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
745  return ret;
746  ff_thread_finish_setup(avctx);
747 
748  if (avctx->bits_per_raw_sample <= 16) {
749  int buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
750  s->nb_samples,
751  AV_SAMPLE_FMT_S32P, 0);
752  if (buf_size < 0)
753  return buf_size;
754  av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size);
755  if (!s->decode_buffer)
756  return AVERROR(ENOMEM);
758  s->decode_buffer, avctx->channels,
760  if (ret < 0)
761  return ret;
762  } else {
763  for (chan = 0; chan < avctx->channels; chan++)
764  s->decoded[chan] = (int32_t *)frame->extended_data[chan];
765  }
766 
767  if (s->nb_samples < 16) {
768  for (chan = 0; chan < avctx->channels; chan++) {
769  int32_t *decoded = s->decoded[chan];
770  for (i = 0; i < s->nb_samples; i++)
771  decoded[i] = get_sbits(gb, avctx->bits_per_raw_sample);
772  }
773  } else {
774  if (s->ti.codec == TAK_CODEC_MONO_STEREO) {
775  for (chan = 0; chan < avctx->channels; chan++)
776  if (ret = decode_channel(s, chan))
777  return ret;
778 
779  if (avctx->channels == 2) {
780  s->nb_subframes = get_bits(gb, 1) + 1;
781  if (s->nb_subframes > 1) {
782  s->subframe_len[1] = get_bits(gb, 6);
783  }
784 
785  s->dmode = get_bits(gb, 3);
786  if (ret = decorrelate(s, 0, 1, s->nb_samples - 1))
787  return ret;
788  }
789  } else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) {
790  if (get_bits1(gb)) {
791  int ch_mask = 0;
792 
793  chan = get_bits(gb, 4) + 1;
794  if (chan > avctx->channels)
795  return AVERROR_INVALIDDATA;
796 
797  for (i = 0; i < chan; i++) {
798  int nbit = get_bits(gb, 4);
799 
800  if (nbit >= avctx->channels)
801  return AVERROR_INVALIDDATA;
802 
803  if (ch_mask & 1 << nbit)
804  return AVERROR_INVALIDDATA;
805 
806  s->mcdparams[i].present = get_bits1(gb);
807  if (s->mcdparams[i].present) {
808  s->mcdparams[i].index = get_bits(gb, 2);
809  s->mcdparams[i].chan2 = get_bits(gb, 4);
810  if (s->mcdparams[i].chan2 >= avctx->channels) {
811  av_log(avctx, AV_LOG_ERROR,
812  "invalid channel 2 (%d) for %d channel(s)\n",
813  s->mcdparams[i].chan2, avctx->channels);
814  return AVERROR_INVALIDDATA;
815  }
816  if (s->mcdparams[i].index == 1) {
817  if ((nbit == s->mcdparams[i].chan2) ||
818  (ch_mask & 1 << s->mcdparams[i].chan2))
819  return AVERROR_INVALIDDATA;
820 
821  ch_mask |= 1 << s->mcdparams[i].chan2;
822  } else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) {
823  return AVERROR_INVALIDDATA;
824  }
825  }
826  s->mcdparams[i].chan1 = nbit;
827 
828  ch_mask |= 1 << nbit;
829  }
830  } else {
831  chan = avctx->channels;
832  for (i = 0; i < chan; i++) {
833  s->mcdparams[i].present = 0;
834  s->mcdparams[i].chan1 = i;
835  }
836  }
837 
838  for (i = 0; i < chan; i++) {
839  if (s->mcdparams[i].present && s->mcdparams[i].index == 1)
840  if (ret = decode_channel(s, s->mcdparams[i].chan2))
841  return ret;
842 
843  if (ret = decode_channel(s, s->mcdparams[i].chan1))
844  return ret;
845 
846  if (s->mcdparams[i].present) {
847  s->dmode = mc_dmodes[s->mcdparams[i].index];
848  if (ret = decorrelate(s,
849  s->mcdparams[i].chan2,
850  s->mcdparams[i].chan1,
851  s->nb_samples - 1))
852  return ret;
853  }
854  }
855  }
856 
857  for (chan = 0; chan < avctx->channels; chan++) {
858  int32_t *decoded = s->decoded[chan];
859 
860  if (s->lpc_mode[chan])
861  decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples);
862 
863  if (s->sample_shift[chan] > 0)
864  for (i = 0; i < s->nb_samples; i++)
865  decoded[i] <<= s->sample_shift[chan];
866  }
867  }
868 
869  align_get_bits(gb);
870  skip_bits(gb, 24);
871  if (get_bits_left(gb) < 0)
872  av_log(avctx, AV_LOG_DEBUG, "overread\n");
873  else if (get_bits_left(gb) > 0)
874  av_log(avctx, AV_LOG_DEBUG, "underread\n");
875 
877  if (ff_tak_check_crc(pkt->data + hsize,
878  get_bits_count(gb) / 8 - hsize)) {
879  av_log(avctx, AV_LOG_ERROR, "CRC error\n");
880  if (avctx->err_recognition & AV_EF_EXPLODE)
881  return AVERROR_INVALIDDATA;
882  }
883  }
884 
885  /* convert to output buffer */
886  switch (avctx->sample_fmt) {
887  case AV_SAMPLE_FMT_U8P:
888  for (chan = 0; chan < avctx->channels; chan++) {
889  uint8_t *samples = (uint8_t *)frame->extended_data[chan];
890  int32_t *decoded = s->decoded[chan];
891  for (i = 0; i < s->nb_samples; i++)
892  samples[i] = decoded[i] + 0x80;
893  }
894  break;
895  case AV_SAMPLE_FMT_S16P:
896  for (chan = 0; chan < avctx->channels; chan++) {
897  int16_t *samples = (int16_t *)frame->extended_data[chan];
898  int32_t *decoded = s->decoded[chan];
899  for (i = 0; i < s->nb_samples; i++)
900  samples[i] = decoded[i];
901  }
902  break;
903  case AV_SAMPLE_FMT_S32P:
904  for (chan = 0; chan < avctx->channels; chan++) {
905  int32_t *samples = (int32_t *)frame->extended_data[chan];
906  for (i = 0; i < s->nb_samples; i++)
907  samples[i] <<= 8;
908  }
909  break;
910  }
911 
912  *got_frame_ptr = 1;
913 
914  return pkt->size;
915 }
916 
917 #if HAVE_THREADS
918 static int init_thread_copy(AVCodecContext *avctx)
919 {
920  TAKDecContext *s = avctx->priv_data;
921  s->avctx = avctx;
922  return 0;
923 }
924 
925 static int update_thread_context(AVCodecContext *dst,
926  const AVCodecContext *src)
927 {
928  TAKDecContext *tsrc = src->priv_data;
929  TAKDecContext *tdst = dst->priv_data;
930 
931  if (dst == src)
932  return 0;
933  memcpy(&tdst->ti, &tsrc->ti, sizeof(TAKStreamInfo));
934  return 0;
935 }
936 #endif
937 
939 {
940  TAKDecContext *s = avctx->priv_data;
941 
942  av_freep(&s->decode_buffer);
943 
944  return 0;
945 }
946 
948  .name = "tak",
949  .long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
950  .type = AVMEDIA_TYPE_AUDIO,
951  .id = AV_CODEC_ID_TAK,
952  .priv_data_size = sizeof(TAKDecContext),
954  .close = tak_decode_close,
957  .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
959  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
963 };
#define TAK_MAX_CHANNELS
Definition: tak.h:64
#define NULL
Definition: coverity.c:32
static int set_bps_params(AVCodecContext *avctx)
Definition: takdec.c:144
const char * s
Definition: avisynth_c.h:768
static const uint16_t predictor_sizes[]
Definition: takdec.c:81
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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:128
int32_t(* scalarproduct_int16)(const int16_t *v1, const int16_t *v2, int len)
Calculate scalar product of two vectors.
Definition: audiodsp.h:29
static int shift(int a, int b)
Definition: sonic.c:82
int16_t subframe_len[MAX_SUBFRAMES]
subframe length in samples
Definition: takdec.c:67
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
int channels
Definition: tak.h:133
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
av_cold void ff_takdsp_init(TAKDSPContext *c)
Definition: takdsp.c:73
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:392
AVFrame * f
Definition: thread.h:36
TAKDSPContext tdsp
Definition: takdec.c:53
int aescape
Definition: takdec.c:89
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
MCDParam mcdparams[TAK_MAX_CHANNELS]
multichannel decorrelation parameters
Definition: takdec.c:72
int16_t filter[MAX_PREDICTORS]
Definition: takdec.c:75
int size
Definition: avcodec.h:1591
const char * b
Definition: vf_curves.c:113
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
Definition: avcodec.h:2962
static int decode_subframe(TAKDecContext *s, int32_t *decoded, int subframe_size, int prev_subframe_size)
Definition: takdec.c:385
av_cold void ff_audiodsp_init(AudioDSPContext *c)
Definition: audiodsp.c:106
uint64_t ch_layout
Definition: tak.h:138
#define a1
Definition: regdef.h:47
static AVPacket pkt
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3060
static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
Definition: takdec.c:254
void(* decorrelate_ls)(int32_t *p1, int32_t *p2, int length)
Definition: takdsp.h:25
AVCodec.
Definition: avcodec.h:3573
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:232
int8_t lpc_mode[TAK_MAX_CHANNELS]
Definition: takdec.c:63
unsigned int decode_buffer_size
Definition: takdec.c:60
#define a3
Definition: regdef.h:49
int init
Definition: takdec.c:86
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2429
uint8_t
#define av_cold
Definition: attributes.h:82
mode
Definition: f_perms.c:27
static av_cold int tak_decode_close(AVCodecContext *avctx)
Definition: takdec.c:938
Multithreading support functions.
int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size)
Definition: tak.c:77
static AVFrame * frame
AVCodecContext * avctx
parent AVCodecContext
Definition: takdec.c:51
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:101
uint8_t * data
Definition: avcodec.h:1590
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
static const uint64_t c1
Definition: murmur3.c:49
int escape
Definition: takdec.c:87
ptrdiff_t size
Definition: opengl_enc.c:101
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:3053
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 FFALIGN(x, a)
Definition: macros.h:48
int data_type
Definition: tak.h:131
static int decode_channel(TAKDecContext *s, int chan)
Definition: takdec.c:509
#define av_log(a,...)
#define MAX_SUBFRAMES
max number of subframes per channel
Definition: takdec.c:40
int8_t index
index into array of decorrelation types
Definition: takdec.c:45
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:568
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int uval
Definition: takdec.c:57
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
GLsizei GLsizei * length
Definition: opengl_enc.c:115
const char * name
Name of the codec implementation.
Definition: avcodec.h:3580
int8_t present
decorrelation parameter availability for this channel
Definition: takdec.c:44
int last_frame_samples
Definition: tak.h:137
static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
Definition: takdec.c:298
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1021
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2472
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:215
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:499
int bps
Definition: tak.h:134
common internal API header
int8_t coding_mode[128]
Definition: takdec.c:74
static av_cold int tak_decode_init(AVCodecContext *avctx)
Definition: takdec.c:183
int8_t chan2
Definition: takdec.c:47
void(* decorrelate_sr)(int32_t *p1, int32_t *p2, int length)
Definition: takdsp.h:26
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2947
#define FFMIN(a, b)
Definition: common.h:96
signed 32 bits, planar
Definition: samplefmt.h:68
static const struct CParam xcodes[50]
void(* decorrelate_sm)(int32_t *p1, int32_t *p2, int length)
Definition: takdsp.h:27
int scale
Definition: takdec.c:88
int32_t
#define a2
Definition: regdef.h:48
static int get_bits_esc4(GetBitContext *gb)
Definition: takdec.c:377
void(* decorrelate_sf)(int32_t *p1, int32_t *p2, int length, int dshift, int dfactor)
Definition: takdsp.h:28
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2958
unsigned 8 bits, planar
Definition: samplefmt.h:66
AudioDSPContext adsp
Definition: takdec.c:52
#define src
Definition: vp9dsp.c:530
uint8_t * decode_buffer
Definition: takdec.c:59
static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
Definition: takdec.c:556
static void decode_lpc(int32_t *coeffs, int mode, int length)
Definition: takdec.c:198
#define FF_ARRAY_ELEMS(a)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AVCodec ff_tak_decoder
Definition: takdec.c:947
Definition: takdec.c:85
#define a5
Definition: regdef.h:51
Libavcodec external API header.
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
#define TAK_MIN_FRAME_HEADER_BYTES
Definition: tak.h:97
int sample_rate
samples per second
Definition: avcodec.h:2421
int16_t predictors[MAX_PREDICTORS]
Definition: takdec.c:65
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:437
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1659
enum TAKCodecType codec
Definition: tak.h:130
int32_t * decoded[TAK_MAX_CHANNELS]
decoded samples for each channel
Definition: takdec.c:61
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
int frame_samples
Definition: tak.h:136
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
TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions.
GetBitContext gb
bitstream reader initialized to start at the current frame
Definition: takdec.c:55
int8_t dmode
channel decorrelation type in the current frame
Definition: takdec.c:70
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data...
Definition: avcodec.h:2955
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
int sample_rate
Definition: tak.h:132
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:752
int bias
Definition: takdec.c:90
int nb_samples
number of samples in the current frame
Definition: takdec.c:58
TAKStreamInfo ti
Definition: takdec.c:54
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
int8_t chan1
Definition: takdec.c:46
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:33
static double c[64]
int16_t residues[544]
Definition: takdec.c:76
static const uint64_t c2
Definition: murmur3.c:50
static const int8_t mc_dmodes[]
Definition: takdec.c:79
int subframe_scale
Definition: takdec.c:68
int nb_subframes
number of subframes in the current frame
Definition: takdec.c:66
#define a4
Definition: regdef.h:50
void * priv_data
Definition: avcodec.h:1701
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
static int tak_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *pkt)
Definition: takdec.c:676
static const int16_t coeffs[]
int len
int channels
number of audio channels
Definition: avcodec.h:2422
static uint8_t tmp[8]
Definition: des.c:38
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:445
#define MAX_PREDICTORS
Definition: takdec.c:41
static void set_sample_rate_params(AVCodecContext *avctx)
Definition: takdec.c:165
#define av_freep(p)
int8_t sample_shift[TAK_MAX_CHANNELS]
shift applied to every sample in the channel
Definition: takdec.c:64
signed 16 bits, planar
Definition: samplefmt.h:67
#define FFSWAP(type, a, b)
Definition: common.h:99
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
This structure stores compressed data.
Definition: avcodec.h:1567
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958
for(j=16;j >0;--j)