FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
iff.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2008 Jaikrishnan Menon <realityman@gmx.net>
3  * Copyright (c) 2010 Peter Ross <pross@xvid.org>
4  * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * IFF file demuxer
26  * by Jaikrishnan Menon
27  * for more information on the .iff file format, visit:
28  * http://wiki.multimedia.cx/index.php?title=IFF
29  */
30 
31 #include <inttypes.h>
32 
33 #include "libavutil/avassert.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/dict.h"
37 #include "libavcodec/bytestream.h"
38 #include "avformat.h"
39 #include "id3v2.h"
40 #include "internal.h"
41 
42 #define ID_8SVX MKTAG('8','S','V','X')
43 #define ID_16SV MKTAG('1','6','S','V')
44 #define ID_MAUD MKTAG('M','A','U','D')
45 #define ID_MHDR MKTAG('M','H','D','R')
46 #define ID_MDAT MKTAG('M','D','A','T')
47 #define ID_VHDR MKTAG('V','H','D','R')
48 #define ID_ATAK MKTAG('A','T','A','K')
49 #define ID_RLSE MKTAG('R','L','S','E')
50 #define ID_CHAN MKTAG('C','H','A','N')
51 #define ID_PBM MKTAG('P','B','M',' ')
52 #define ID_ILBM MKTAG('I','L','B','M')
53 #define ID_BMHD MKTAG('B','M','H','D')
54 #define ID_DGBL MKTAG('D','G','B','L')
55 #define ID_CAMG MKTAG('C','A','M','G')
56 #define ID_CMAP MKTAG('C','M','A','P')
57 #define ID_ACBM MKTAG('A','C','B','M')
58 #define ID_DEEP MKTAG('D','E','E','P')
59 #define ID_RGB8 MKTAG('R','G','B','8')
60 #define ID_RGBN MKTAG('R','G','B','N')
61 #define ID_DSD MKTAG('D','S','D',' ')
62 #define ID_DST MKTAG('D','S','T',' ')
63 #define ID_DSTC MKTAG('D','S','T','C')
64 #define ID_DSTF MKTAG('D','S','T','F')
65 #define ID_FRTE MKTAG('F','R','T','E')
66 #define ID_ANIM MKTAG('A','N','I','M')
67 #define ID_ANHD MKTAG('A','N','H','D')
68 #define ID_DLTA MKTAG('D','L','T','A')
69 #define ID_DPAN MKTAG('D','P','A','N')
70 
71 #define ID_FORM MKTAG('F','O','R','M')
72 #define ID_FRM8 MKTAG('F','R','M','8')
73 #define ID_ANNO MKTAG('A','N','N','O')
74 #define ID_AUTH MKTAG('A','U','T','H')
75 #define ID_CHRS MKTAG('C','H','R','S')
76 #define ID_COPYRIGHT MKTAG('(','c',')',' ')
77 #define ID_CSET MKTAG('C','S','E','T')
78 #define ID_FVER MKTAG('F','V','E','R')
79 #define ID_NAME MKTAG('N','A','M','E')
80 #define ID_TEXT MKTAG('T','E','X','T')
81 #define ID_ABIT MKTAG('A','B','I','T')
82 #define ID_BODY MKTAG('B','O','D','Y')
83 #define ID_DBOD MKTAG('D','B','O','D')
84 #define ID_DPEL MKTAG('D','P','E','L')
85 #define ID_DLOC MKTAG('D','L','O','C')
86 #define ID_TVDC MKTAG('T','V','D','C')
87 
88 #define LEFT 2
89 #define RIGHT 4
90 #define STEREO 6
91 
92 /**
93  * This number of bytes if added at the beginning of each AVPacket
94  * which contain additional information about video properties
95  * which has to be shared between demuxer and decoder.
96  * This number may change between frames, e.g. the demuxer might
97  * set it to smallest possible size of 2 to indicate that there's
98  * no extradata changing in this frame.
99  */
100 #define IFF_EXTRA_VIDEO_SIZE 41
101 
102 typedef enum {
107 
108 typedef struct IffDemuxContext {
109  int is_64bit; ///< chunk size is 64-bit
110  int64_t body_pos;
111  int64_t body_end;
112  uint32_t body_size;
114  unsigned maud_bits;
116  unsigned bitmap_compression; ///< delta compression method used
117  unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
118  unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
119  unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
120  unsigned transparency; ///< transparency color index in palette
121  unsigned masking; ///< masking method used
122  uint8_t tvdc[32]; ///< TVDC lookup table
123  int64_t pts;
125 
126 /* Metadata string read */
128  const char *const tag,
129  const unsigned data_size)
130 {
131  uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
132 
133  if (!buf)
134  return AVERROR(ENOMEM);
135 
136  if (avio_read(s->pb, buf, data_size) != data_size) {
137  av_free(buf);
138  return AVERROR(EIO);
139  }
140  buf[data_size] = 0;
142  return 0;
143 }
144 
145 static int iff_probe(AVProbeData *p)
146 {
147  const uint8_t *d = p->buf;
148 
149  if ( (AV_RL32(d) == ID_FORM &&
150  (AV_RL32(d+8) == ID_8SVX ||
151  AV_RL32(d+8) == ID_16SV ||
152  AV_RL32(d+8) == ID_MAUD ||
153  AV_RL32(d+8) == ID_PBM ||
154  AV_RL32(d+8) == ID_ACBM ||
155  AV_RL32(d+8) == ID_DEEP ||
156  AV_RL32(d+8) == ID_ILBM ||
157  AV_RL32(d+8) == ID_RGB8 ||
158  AV_RL32(d+8) == ID_ANIM ||
159  AV_RL32(d+8) == ID_RGBN)) ||
160  (AV_RL32(d) == ID_FRM8 && AV_RL32(d+12) == ID_DSD))
161  return AVPROBE_SCORE_MAX;
162  return 0;
163 }
164 
165 static const AVCodecTag dsd_codec_tags[] = {
167  { AV_CODEC_ID_DST, ID_DST },
168  { AV_CODEC_ID_NONE, 0 },
169 };
170 
171 
172 #define DSD_SLFT MKTAG('S','L','F','T')
173 #define DSD_SRGT MKTAG('S','R','G','T')
174 #define DSD_MLFT MKTAG('M','L','F','T')
175 #define DSD_MRGT MKTAG('M','R','G','T')
176 #define DSD_C MKTAG('C',' ',' ',' ')
177 #define DSD_LS MKTAG('L','S',' ',' ')
178 #define DSD_RS MKTAG('R','S',' ',' ')
179 #define DSD_LFE MKTAG('L','F','E',' ')
180 
181 static const uint32_t dsd_stereo[] = { DSD_SLFT, DSD_SRGT };
182 static const uint32_t dsd_5point0[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LS, DSD_RS };
183 static const uint32_t dsd_5point1[] = { DSD_MLFT, DSD_MRGT, DSD_C, DSD_LFE, DSD_LS, DSD_RS };
184 
185 typedef struct {
186  uint64_t layout;
187  const uint32_t * dsd_layout;
188 } DSDLayoutDesc;
189 
194 };
195 
196 static const uint64_t dsd_loudspeaker_config[] = {
198  0, 0,
200 };
201 
202 static const char * dsd_source_comment[] = {
203  "dsd_source_comment",
204  "analogue_source_comment",
205  "pcm_source_comment",
206 };
207 
208 static const char * dsd_history_comment[] = {
209  "general_remark",
210  "operator_name",
211  "creating_machine",
212  "timezone",
213  "file_revision"
214 };
215 
216 static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
217 {
218  AVIOContext *pb = s->pb;
219 
220  while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
221  uint32_t tag = avio_rl32(pb);
222  uint64_t size = avio_rb64(pb);
223  uint64_t orig_pos = avio_tell(pb);
224  const char * metadata_tag = NULL;
225 
226  switch(tag) {
227  case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
228  case MKTAG('D','I','T','I'): metadata_tag = "title"; break;
229  }
230 
231  if (metadata_tag && size > 4) {
232  unsigned int tag_size = avio_rb32(pb);
233  int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
234  if (ret < 0) {
235  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
236  return ret;
237  }
238  }
239 
240  avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
241  }
242 
243  return 0;
244 }
245 
246 static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
247 {
248  AVIOContext *pb = s->pb;
249  char abss[24];
250  int hour, min, sec, i, ret, config;
251  int dsd_layout[6];
252  ID3v2ExtraMeta *id3v2_extra_meta;
253 
254  while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
255  uint32_t tag = avio_rl32(pb);
256  uint64_t size = avio_rb64(pb);
257  uint64_t orig_pos = avio_tell(pb);
258 
259  switch(tag) {
260  case MKTAG('A','B','S','S'):
261  if (size < 8)
262  return AVERROR_INVALIDDATA;
263  hour = avio_rb16(pb);
264  min = avio_r8(pb);
265  sec = avio_r8(pb);
266  snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
267  av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
268  break;
269 
270  case MKTAG('C','H','N','L'):
271  if (size < 2)
272  return AVERROR_INVALIDDATA;
273  st->codecpar->channels = avio_rb16(pb);
274  if (size < 2 + st->codecpar->channels * 4)
275  return AVERROR_INVALIDDATA;
276  st->codecpar->channel_layout = 0;
277  if (st->codecpar->channels > FF_ARRAY_ELEMS(dsd_layout)) {
278  avpriv_request_sample(s, "channel layout");
279  break;
280  }
281  for (i = 0; i < st->codecpar->channels; i++)
282  dsd_layout[i] = avio_rl32(pb);
283  for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
284  const DSDLayoutDesc * d = &dsd_channel_layout[i];
286  !memcmp(d->dsd_layout, dsd_layout, st->codecpar->channels * sizeof(uint32_t))) {
287  st->codecpar->channel_layout = d->layout;
288  break;
289  }
290  }
291  break;
292 
293  case MKTAG('C','M','P','R'):
294  if (size < 4)
295  return AVERROR_INVALIDDATA;
296  st->codecpar->codec_tag = tag = avio_rl32(pb);
297  st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag);
298  if (!st->codecpar->codec_id) {
299  av_log(s, AV_LOG_ERROR, "'%c%c%c%c' compression is not supported\n",
300  tag&0xFF, (tag>>8)&0xFF, (tag>>16)&0xFF, (tag>>24)&0xFF);
301  return AVERROR_PATCHWELCOME;
302  }
303  break;
304 
305  case MKTAG('F','S',' ',' '):
306  if (size < 4)
307  return AVERROR_INVALIDDATA;
308  st->codecpar->sample_rate = avio_rb32(pb) / 8;
309  break;
310 
311  case MKTAG('I','D','3',' '):
312  id3v2_extra_meta = NULL;
313  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
314  if (id3v2_extra_meta) {
315  if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) {
316  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
317  return ret;
318  }
319  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
320  }
321 
322  if (size < avio_tell(pb) - orig_pos) {
323  av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
324  return AVERROR_INVALIDDATA;
325  }
326  break;
327 
328  case MKTAG('L','S','C','O'):
329  if (size < 2)
330  return AVERROR_INVALIDDATA;
331  config = avio_rb16(pb);
332  if (config != 0xFFFF) {
335  if (!st->codecpar->channel_layout)
336  avpriv_request_sample(s, "loudspeaker configuration %d", config);
337  }
338  break;
339  }
340 
341  avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
342  }
343 
344  return 0;
345 }
346 
348 {
349  IffDemuxContext *iff = s->priv_data;
350  AVIOContext *pb = s->pb;
351  uint32_t chunk_id;
352  uint64_t chunk_pos, data_pos, data_size;
353  int ret = AVERROR_EOF;
354 
355  while (!avio_feof(pb)) {
356  chunk_pos = avio_tell(pb);
357  if (chunk_pos >= iff->body_end)
358  return AVERROR_EOF;
359 
360  chunk_id = avio_rl32(pb);
361  data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
362  data_pos = avio_tell(pb);
363 
364  if (data_size < 1)
365  return AVERROR_INVALIDDATA;
366 
367  switch (chunk_id) {
368  case ID_DSTF:
369  if (!pkt) {
370  iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
371  iff->body_size = iff->body_end - iff->body_pos;
372  return 0;
373  }
374  ret = av_get_packet(pb, pkt, data_size);
375  if (ret < 0)
376  return ret;
377  if (data_size & 1)
378  avio_skip(pb, 1);
379  pkt->flags |= AV_PKT_FLAG_KEY;
380  pkt->stream_index = 0;
381  pkt->duration = 588 * s->streams[0]->codecpar->sample_rate / 44100;
382  pkt->pos = chunk_pos;
383 
384  chunk_pos = avio_tell(pb);
385  if (chunk_pos >= iff->body_end)
386  return 0;
387 
388  avio_seek(pb, chunk_pos, SEEK_SET);
389  return 0;
390 
391  case ID_FRTE:
392  if (data_size < 4)
393  return AVERROR_INVALIDDATA;
394  s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100;
395  break;
396  }
397 
398  avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
399  }
400 
401  return ret;
402 }
403 
404 static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
405 static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
406 static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
407 static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
408 static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
409 
411 {
412  IffDemuxContext *iff = s->priv_data;
413  AVIOContext *pb = s->pb;
414  AVStream *st;
415  uint8_t *buf;
416  uint32_t chunk_id;
417  uint64_t data_size;
418  uint32_t screenmode = 0, num, den;
419  unsigned transparency = 0;
420  unsigned masking = 0; // no mask
421  uint8_t fmt[16];
422  int fmt_size;
423 
424  st = avformat_new_stream(s, NULL);
425  if (!st)
426  return AVERROR(ENOMEM);
427 
428  st->codecpar->channels = 1;
430  iff->is_64bit = avio_rl32(pb) == ID_FRM8;
431  avio_skip(pb, iff->is_64bit ? 8 : 4);
432  // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
433  st->codecpar->codec_tag = avio_rl32(pb);
434  if (st->codecpar->codec_tag == ID_ANIM) {
435  avio_skip(pb, 12);
436  }
437  iff->bitmap_compression = -1;
438  iff->svx8_compression = -1;
439  iff->maud_bits = -1;
440  iff->maud_compression = -1;
441 
442  while(!avio_feof(pb)) {
443  uint64_t orig_pos;
444  int res;
445  const char *metadata_tag = NULL;
446  int version, nb_comments, i;
447  chunk_id = avio_rl32(pb);
448  data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
449  orig_pos = avio_tell(pb);
450 
451  switch(chunk_id) {
452  case ID_VHDR:
454 
455  if (data_size < 14)
456  return AVERROR_INVALIDDATA;
457  avio_skip(pb, 12);
458  st->codecpar->sample_rate = avio_rb16(pb);
459  if (data_size >= 16) {
460  avio_skip(pb, 1);
461  iff->svx8_compression = avio_r8(pb);
462  }
463  break;
464 
465  case ID_MHDR:
467 
468  if (data_size < 32)
469  return AVERROR_INVALIDDATA;
470  avio_skip(pb, 4);
471  iff->maud_bits = avio_rb16(pb);
472  avio_skip(pb, 2);
473  num = avio_rb32(pb);
474  den = avio_rb16(pb);
475  if (!den)
476  return AVERROR_INVALIDDATA;
477  avio_skip(pb, 2);
478  st->codecpar->sample_rate = num / den;
479  st->codecpar->channels = avio_rb16(pb);
480  iff->maud_compression = avio_rb16(pb);
481  if (st->codecpar->channels == 1)
483  else if (st->codecpar->channels == 2)
485  break;
486 
487  case ID_ABIT:
488  case ID_BODY:
489  case ID_DBOD:
490  case ID_DSD:
491  case ID_DST:
492  case ID_MDAT:
493  iff->body_pos = avio_tell(pb);
494  iff->body_end = iff->body_pos + data_size;
495  iff->body_size = data_size;
496  if (chunk_id == ID_DST) {
497  int ret = read_dst_frame(s, NULL);
498  if (ret < 0)
499  return ret;
500  }
501  break;
502 
503  case ID_CHAN:
504  if (data_size < 4)
505  return AVERROR_INVALIDDATA;
506  if (avio_rb32(pb) < 6) {
507  st->codecpar->channels = 1;
509  } else {
510  st->codecpar->channels = 2;
512  }
513  break;
514 
515  case ID_CAMG:
516  if (data_size < 4)
517  return AVERROR_INVALIDDATA;
518  screenmode = avio_rb32(pb);
519  break;
520 
521  case ID_CMAP:
522  if (data_size < 3 || data_size > 768 || data_size % 3) {
523  av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
524  data_size);
525  return AVERROR_INVALIDDATA;
526  }
527  st->codecpar->extradata_size = data_size + IFF_EXTRA_VIDEO_SIZE;
528  st->codecpar->extradata = av_malloc(data_size + IFF_EXTRA_VIDEO_SIZE + AV_INPUT_BUFFER_PADDING_SIZE);
529  if (!st->codecpar->extradata)
530  return AVERROR(ENOMEM);
531  if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0)
532  return AVERROR(EIO);
533  break;
534 
535  case ID_BMHD:
537  if (data_size <= 8)
538  return AVERROR_INVALIDDATA;
539  st->codecpar->width = avio_rb16(pb);
540  st->codecpar->height = avio_rb16(pb);
541  avio_skip(pb, 4); // x, y offset
543  if (data_size >= 10)
544  masking = avio_r8(pb);
545  if (data_size >= 11)
546  iff->bitmap_compression = avio_r8(pb);
547  if (data_size >= 14) {
548  avio_skip(pb, 1); // padding
549  transparency = avio_rb16(pb);
550  }
551  if (data_size >= 16) {
552  st->sample_aspect_ratio.num = avio_r8(pb);
553  st->sample_aspect_ratio.den = avio_r8(pb);
554  }
555  break;
556 
557  case ID_ANHD:
558  break;
559 
560  case ID_DPAN:
561  avio_skip(pb, 2);
562  st->duration = avio_rb16(pb);
563  break;
564 
565  case ID_DPEL:
566  if (data_size < 4 || (data_size & 3))
567  return AVERROR_INVALIDDATA;
568  if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
569  return fmt_size;
570  if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
572  else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
574  else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
576  else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
578  else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
580  else {
581  avpriv_request_sample(s, "color format %.16s", fmt);
582  return AVERROR_PATCHWELCOME;
583  }
584  break;
585 
586  case ID_DGBL:
588  if (data_size < 8)
589  return AVERROR_INVALIDDATA;
590  st->codecpar->width = avio_rb16(pb);
591  st->codecpar->height = avio_rb16(pb);
592  iff->bitmap_compression = avio_rb16(pb);
593  st->sample_aspect_ratio.num = avio_r8(pb);
594  st->sample_aspect_ratio.den = avio_r8(pb);
596  break;
597 
598  case ID_DLOC:
599  if (data_size < 4)
600  return AVERROR_INVALIDDATA;
601  st->codecpar->width = avio_rb16(pb);
602  st->codecpar->height = avio_rb16(pb);
603  break;
604 
605  case ID_TVDC:
606  if (data_size < sizeof(iff->tvdc))
607  return AVERROR_INVALIDDATA;
608  res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
609  if (res < 0)
610  return res;
611  break;
612 
613  case ID_ANNO:
614  case ID_TEXT: metadata_tag = "comment"; break;
615  case ID_AUTH: metadata_tag = "artist"; break;
616  case ID_COPYRIGHT: metadata_tag = "copyright"; break;
617  case ID_NAME: metadata_tag = "title"; break;
618 
619  /* DSD tags */
620 
621  case MKTAG('F','V','E','R'):
622  if (data_size < 4)
623  return AVERROR_INVALIDDATA;
624  version = avio_rb32(pb);
625  av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
627  break;
628 
629  case MKTAG('D','I','I','N'):
630  res = parse_dsd_diin(s, st, orig_pos + data_size);
631  if (res < 0)
632  return res;
633  break;
634 
635  case MKTAG('P','R','O','P'):
636  if (data_size < 4)
637  return AVERROR_INVALIDDATA;
638  if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
639  avpriv_request_sample(s, "unknown property type");
640  break;
641  }
642  res = parse_dsd_prop(s, st, orig_pos + data_size);
643  if (res < 0)
644  return res;
645  break;
646 
647  case MKTAG('C','O','M','T'):
648  if (data_size < 2)
649  return AVERROR_INVALIDDATA;
650  nb_comments = avio_rb16(pb);
651  for (i = 0; i < nb_comments; i++) {
652  int year, mon, day, hour, min, type, ref;
653  char tmp[24];
654  const char *tag;
655  int metadata_size;
656 
657  year = avio_rb16(pb);
658  mon = avio_r8(pb);
659  day = avio_r8(pb);
660  hour = avio_r8(pb);
661  min = avio_r8(pb);
662  snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
663  av_dict_set(&st->metadata, "comment_time", tmp, 0);
664 
665  type = avio_rb16(pb);
666  ref = avio_rb16(pb);
667  switch (type) {
668  case 1:
669  if (!i)
670  tag = "channel_comment";
671  else {
672  snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
673  tag = tmp;
674  }
675  break;
676  case 2:
677  tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
678  break;
679  case 3:
680  tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
681  break;
682  default:
683  tag = "comment";
684  }
685 
686  metadata_size = avio_rb32(pb);
687  if ((res = get_metadata(s, tag, metadata_size)) < 0) {
688  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
689  return res;
690  }
691 
692  if (metadata_size & 1)
693  avio_skip(pb, 1);
694  }
695  break;
696  }
697 
698  if (metadata_tag) {
699  if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
700  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
701  return res;
702  }
703  }
704  avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
705  }
706 
707  if (st->codecpar->codec_tag == ID_ANIM)
708  avio_seek(pb, 12, SEEK_SET);
709  else
710  avio_seek(pb, iff->body_pos, SEEK_SET);
711 
712  switch(st->codecpar->codec_type) {
713  case AVMEDIA_TYPE_AUDIO:
714  avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
715 
716  if (st->codecpar->codec_tag == ID_16SV)
718  else if (st->codecpar->codec_tag == ID_MAUD) {
719  if (iff->maud_bits == 8 && !iff->maud_compression) {
721  } else if (iff->maud_bits == 16 && !iff->maud_compression) {
723  } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
725  } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
727  } else {
728  avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
729  return AVERROR_PATCHWELCOME;
730  }
731  } else if (st->codecpar->codec_tag != ID_DSD &&
732  st->codecpar->codec_tag != ID_DST) {
733  switch (iff->svx8_compression) {
734  case COMP_NONE:
736  break;
737  case COMP_FIB:
739  break;
740  case COMP_EXP:
742  break;
743  default:
744  av_log(s, AV_LOG_ERROR,
745  "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
746  return -1;
747  }
748  }
749 
753  if (st->codecpar->codec_tag == ID_DSD && st->codecpar->block_align <= 0)
754  return AVERROR_INVALIDDATA;
755  break;
756 
757  case AVMEDIA_TYPE_VIDEO:
758  iff->bpp = st->codecpar->bits_per_coded_sample;
759  if (st->codecpar->codec_tag == ID_ANIM)
760  avpriv_set_pts_info(st, 32, 1, 60);
761  if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
762  iff->ham = iff->bpp > 6 ? 6 : 4;
764  }
765  iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
766  iff->masking = masking;
767  iff->transparency = transparency;
768 
769  if (!st->codecpar->extradata) {
772  if (!st->codecpar->extradata)
773  return AVERROR(ENOMEM);
774  }
776  buf = st->codecpar->extradata;
777  bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
778  bytestream_put_byte(&buf, iff->bitmap_compression);
779  bytestream_put_byte(&buf, iff->bpp);
780  bytestream_put_byte(&buf, iff->ham);
781  bytestream_put_byte(&buf, iff->flags);
782  bytestream_put_be16(&buf, iff->transparency);
783  bytestream_put_byte(&buf, iff->masking);
784  bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
786  break;
787  default:
788  return -1;
789  }
790 
791  return 0;
792 }
793 
794 static unsigned get_anim_duration(uint8_t *buf, int size)
795 {
796  GetByteContext gb;
797 
798  bytestream2_init(&gb, buf, size);
799  bytestream2_skip(&gb, 4);
800  while (bytestream2_get_bytes_left(&gb) > 8) {
801  unsigned chunk = bytestream2_get_le32(&gb);
802  unsigned size = bytestream2_get_be32(&gb);
803 
804  if (chunk == ID_ANHD) {
805  if (size < 40)
806  break;
807  bytestream2_skip(&gb, 14);
808  return bytestream2_get_be32(&gb);
809  } else {
810  bytestream2_skip(&gb, size + size & 1);
811  }
812  }
813  return 10;
814 }
815 
817  AVPacket *pkt)
818 {
819  IffDemuxContext *iff = s->priv_data;
820  AVIOContext *pb = s->pb;
821  AVStream *st = s->streams[0];
822  int ret;
823  int64_t pos = avio_tell(pb);
824 
825  if (avio_feof(pb))
826  return AVERROR_EOF;
827  if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
828  return AVERROR_EOF;
829 
830  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
831  if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
832  ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
833  } else if (st->codecpar->codec_tag == ID_DST) {
834  return read_dst_frame(s, pkt);
835  } else {
836  if (iff->body_size > INT_MAX)
837  return AVERROR_INVALIDDATA;
838  ret = av_get_packet(pb, pkt, iff->body_size);
839  }
840  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
841  st->codecpar->codec_tag == ID_ANIM) {
842  uint64_t data_size, orig_pos;
843  uint32_t chunk_id, chunk_id2;
844 
845  while (!avio_feof(pb)) {
846  if (avio_feof(pb))
847  return AVERROR_EOF;
848 
849  orig_pos = avio_tell(pb);
850  chunk_id = avio_rl32(pb);
851  data_size = avio_rb32(pb);
852  chunk_id2 = avio_rl32(pb);
853 
854  if (chunk_id == ID_FORM &&
855  chunk_id2 == ID_ILBM) {
856  avio_skip(pb, -4);
857  break;
858  } else if (chunk_id == ID_FORM &&
859  chunk_id2 == ID_ANIM) {
860  continue;
861  } else {
862  avio_skip(pb, data_size);
863  }
864  }
865  ret = av_get_packet(pb, pkt, data_size);
866  pkt->pos = orig_pos;
867  pkt->duration = get_anim_duration(pkt->data, pkt->size);
868  if (pos == 12)
869  pkt->flags |= AV_PKT_FLAG_KEY;
870  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
871  st->codecpar->codec_tag != ID_ANIM) {
872  ret = av_get_packet(pb, pkt, iff->body_size);
873  pkt->pos = pos;
874  if (pos == iff->body_pos)
875  pkt->flags |= AV_PKT_FLAG_KEY;
876  } else {
877  av_assert0(0);
878  }
879 
880  if (ret < 0)
881  return ret;
882  pkt->stream_index = 0;
883  return ret;
884 }
885 
887  .name = "iff",
888  .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
889  .priv_data_size = sizeof(IffDemuxContext),
894 };
static const uint8_t deep_abgr[]
Definition: iff.c:408
#define DSD_SRGT
Definition: iff.c:173
#define NULL
Definition: coverity.c:32
#define DSD_SLFT
Definition: iff.c:172
unsigned transparency
transparency color index in palette
Definition: iff.c:120
#define ID_CAMG
Definition: iff.c:55
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:147
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define ID_ANHD
Definition: iff.c:67
static const uint32_t dsd_5point0[]
Definition: iff.c:182
unsigned ham
0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
Definition: iff.c:118
#define ID_RGB8
Definition: iff.c:59
#define ID_ACBM
Definition: iff.c:57
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2955
const char * fmt
Definition: avisynth_c.h:632
#define ID_PBM
Definition: iff.c:51
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1600
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4436
static FFServerConfig config
Definition: ffserver.c:202
static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
Definition: iff.c:246
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3922
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1581
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
unsigned maud_compression
Definition: iff.c:115
int64_t body_end
Definition: iff.c:111
static const uint32_t dsd_5point1[]
Definition: iff.c:183
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
int version
Definition: avisynth_c.h:629
static AVPacket pkt
#define ID_8SVX
Definition: iff.c:42
#define AV_CH_LAYOUT_STEREO
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:736
svx8_compression_type svx8_compression
Definition: iff.c:113
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1078
#define AV_CH_LAYOUT_5POINT0
#define IFF_EXTRA_VIDEO_SIZE
This number of bytes if added at the beginning of each AVPacket which contain additional information ...
Definition: iff.c:100
#define ID_16SV
Definition: iff.c:43
static const DSDLayoutDesc dsd_channel_layout[]
Definition: iff.c:190
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
Format I/O context.
Definition: avformat.h:1325
#define ID_MHDR
Definition: iff.c:45
uint8_t tvdc[32]
TVDC lookup table.
Definition: iff.c:122
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define ID_ANNO
Definition: iff.c:73
#define ID_FRTE
Definition: iff.c:65
uint8_t
#define av_malloc(s)
int width
Video only.
Definition: avcodec.h:3988
#define ID_MAUD
Definition: iff.c:44
#define DSD_LS
Definition: iff.c:177
#define ID_NAME
Definition: iff.c:79
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:751
uint32_t body_size
Definition: iff.c:112
static int iff_probe(AVProbeData *p)
Definition: iff.c:145
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1598
static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
Definition: iff.c:216
#define ID_DSD
Definition: iff.c:61
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4074
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:95
#define ID_DBOD
Definition: iff.c:83
Definition: iff.c:104
uint8_t * data
Definition: avcodec.h:1580
uint64_t layout
Definition: iff.c:186
uint32_t tag
Definition: movenc.c:1367
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:260
ptrdiff_t size
Definition: opengl_enc.c:101
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:818
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
#define ID_DPAN
Definition: iff.c:69
#define ID_CHAN
Definition: iff.c:50
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4024
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:598
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3951
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1612
#define AV_CH_LAYOUT_5POINT1
#define ID_ANIM
Definition: iff.c:66
static int iff_read_header(AVFormatContext *s)
Definition: iff.c:410
#define ID_TEXT
Definition: iff.c:80
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3446
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1539
#define ID_DST
Definition: iff.c:62
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
static const char * dsd_history_comment[]
Definition: iff.c:208
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
#define ID_FRM8
Definition: iff.c:72
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3918
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1062
simple assert() macros that are a bit more flexible than ISO C assert().
#define ID_FORM
Definition: iff.c:71
#define ID_ILBM
Definition: iff.c:52
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:93
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1586
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3940
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:589
#define DSD_C
Definition: iff.c:176
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
unsigned flags
1 for EHB, 0 is no extra half darkening
Definition: iff.c:119
int block_align
Audio only.
Definition: avcodec.h:4039
#define ID_VHDR
Definition: iff.c:47
#define ID_TVDC
Definition: iff.c:86
audio channel layout utility functions
Definition: iff.c:105
#define ID_ABIT
Definition: iff.c:81
#define ID_BODY
Definition: iff.c:82
#define FFMIN(a, b)
Definition: common.h:96
AVInputFormat ff_iff_demuxer
Definition: iff.c:886
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
#define ID_AUTH
Definition: iff.c:74
#define DSD_MLFT
Definition: iff.c:174
static const uint32_t dsd_stereo[]
Definition: iff.c:181
AVDictionary * metadata
Definition: avformat.h:945
int64_t pts
Definition: iff.c:123
#define FF_ARRAY_ELEMS(a)
static int iff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: iff.c:816
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
svx8_compression_type
Definition: iff.c:102
unsigned bpp
bits per plane to decode (differs from bits_per_coded_sample if HAM)
Definition: iff.c:117
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
static const uint64_t dsd_loudspeaker_config[]
Definition: iff.c:196
#define ID_RGBN
Definition: iff.c:60
void * buf
Definition: avisynth_c.h:553
GLint GLenum type
Definition: opengl_enc.c:105
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:69
#define ID_MDAT
Definition: iff.c:46
#define ID_DEEP
Definition: iff.c:58
static const AVCodecTag dsd_codec_tags[]
Definition: iff.c:165
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:485
unsigned maud_bits
Definition: iff.c:114
#define snprintf
Definition: snprintf.h:34
This structure contains the data a format has to probe a file.
Definition: avformat.h:459
#define ID_DGBL
Definition: iff.c:54
#define ID_DLOC
Definition: iff.c:85
const uint32_t * dsd_layout
Definition: iff.c:187
static int flags
Definition: cpu.c:47
static const uint8_t deep_rgba[]
Definition: iff.c:405
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4032
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
Main libavformat public API header.
unsigned bitmap_compression
delta compression method used
Definition: iff.c:116
if(ret< 0)
Definition: vf_mcdeint.c:282
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
int is_64bit
chunk size is 64-bit
Definition: iff.c:109
static const uint8_t deep_bgra[]
Definition: iff.c:406
#define ID_CMAP
Definition: iff.c:56
#define DSD_LFE
Definition: iff.c:179
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata and chapters.
Definition: id3v2.c:1056
int den
denominator
Definition: rational.h:45
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:368
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:731
Definition: iff.c:103
static const uint8_t deep_rgb24[]
Definition: iff.c:404
#define av_free(p)
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:492
static const char * dsd_source_comment[]
Definition: iff.c:202
static uint8_t tmp[8]
Definition: des.c:38
void * priv_data
Format private data.
Definition: avformat.h:1353
int64_t body_pos
Definition: iff.c:110
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3964
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3936
int channels
Audio only.
Definition: avcodec.h:4028
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
#define ID_DPEL
Definition: iff.c:84
static int get_metadata(AVFormatContext *s, const char *const tag, const unsigned data_size)
Definition: iff.c:127
AVCodecParameters * codecpar
Definition: avformat.h:1228
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:328
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3926
#define DSD_MRGT
Definition: iff.c:175
#define DSD_RS
Definition: iff.c:178
static const uint8_t deep_argb[]
Definition: iff.c:407
int stream_index
Definition: avcodec.h:1582
#define ID_COPYRIGHT
Definition: iff.c:76
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:342
#define ID_BMHD
Definition: iff.c:53
float min
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1557
#define ID_DSTF
Definition: iff.c:64
static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
Definition: iff.c:347
unsigned masking
masking method used
Definition: iff.c:121
static unsigned get_anim_duration(uint8_t *buf, int size)
Definition: iff.c:794