FFmpeg: libavformat/iff.c Source File

FFmpeg
iff.c
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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"
34 #include "libavutil/channel_layout.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 {
103   COMP_NONE,
104   COMP_FIB,
105   COMP_EXP
106 } svx8_compression_type;
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;
113   svx8_compression_type svx8_compression;
114   unsigned maud_bits;
115   unsigned maud_compression;
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;
124 } IffDemuxContext;
125 
126 /* Metadata string read */
127  static int get_metadata(AVFormatContext *s,
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;
141  av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
142  return 0;
143 }
144 
145  static int iff_probe(const 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[] = {
166  { AV_CODEC_ID_DSD_MSBF, ID_DSD },
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   AVChannelLayout layout;
187   const uint32_t * dsd_layout;
188 } DSDLayoutDesc;
189 
190  static const DSDLayoutDesc dsd_channel_layout[] = {
191  { AV_CHANNEL_LAYOUT_STEREO, dsd_stereo },
192  { AV_CHANNEL_LAYOUT_5POINT0, dsd_5point0 },
193  { AV_CHANNEL_LAYOUT_5POINT1, dsd_5point1 },
194 };
195 
196  static const AVChannelLayout dsd_loudspeaker_config[] = {
197  AV_CHANNEL_LAYOUT_STEREO,
198  { 0 }, { 0 },
199  AV_CHANNEL_LAYOUT_5POINT0, AV_CHANNEL_LAYOUT_5POINT1,
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  if (size >= INT64_MAX)
227  return AVERROR_INVALIDDATA;
228 
229  switch(tag) {
230  case MKTAG('D','I','A','R'): metadata_tag = "artist"; break;
231  case MKTAG('D','I','T','I'): metadata_tag = "title"; break;
232  }
233 
234  if (metadata_tag && size > 4) {
235  unsigned int tag_size = avio_rb32(pb);
236  int ret = get_metadata(s, metadata_tag, FFMIN(tag_size, size - 4));
237  if (ret < 0) {
238  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
239  return ret;
240  }
241  }
242 
243  avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
244  }
245 
246  return 0;
247 }
248 
249  static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
250 {
251  AVIOContext *pb = s->pb;
252  char abss[24];
253  int hour, min, sec, i, ret, config;
254  int dsd_layout[6];
255  ID3v2ExtraMeta *id3v2_extra_meta;
256 
257  while (avio_tell(pb) + 12 <= eof && !avio_feof(pb)) {
258  uint32_t tag = avio_rl32(pb);
259  uint64_t size = avio_rb64(pb);
260  uint64_t orig_pos = avio_tell(pb);
261 
262  if (size >= INT64_MAX)
263  return AVERROR_INVALIDDATA;
264 
265  switch(tag) {
266  case MKTAG('A','B','S','S'):
267  if (size < 8)
268  return AVERROR_INVALIDDATA;
269  hour = avio_rb16(pb);
270  min = avio_r8(pb);
271  sec = avio_r8(pb);
272  snprintf(abss, sizeof(abss), "%02dh:%02dm:%02ds:%d", hour, min, sec, avio_rb32(pb));
273  av_dict_set(&st->metadata, "absolute_start_time", abss, 0);
274  break;
275 
276  case MKTAG('C','H','N','L'):
277  if (size < 2)
278  return AVERROR_INVALIDDATA;
279  st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
280  st->codecpar->ch_layout.nb_channels = avio_rb16(pb);
281  if (size < 2 + st->codecpar->ch_layout.nb_channels * 4)
282  return AVERROR_INVALIDDATA;
283  if (st->codecpar->ch_layout.nb_channels > FF_ARRAY_ELEMS(dsd_layout)) {
284  avpriv_request_sample(s, "channel layout");
285  break;
286  }
287  for (i = 0; i < st->codecpar->ch_layout.nb_channels; i++)
288  dsd_layout[i] = avio_rl32(pb);
289  for (i = 0; i < FF_ARRAY_ELEMS(dsd_channel_layout); i++) {
290  const DSDLayoutDesc * d = &dsd_channel_layout[i];
291  if (d->layout.nb_channels == st->codecpar->ch_layout.nb_channels &&
292  !memcmp(d->dsd_layout, dsd_layout, d->layout.nb_channels * sizeof(uint32_t))) {
293  st->codecpar->ch_layout = d->layout;
294  break;
295  }
296  }
297  break;
298 
299  case MKTAG('C','M','P','R'):
300  if (size < 4)
301  return AVERROR_INVALIDDATA;
302  st->codecpar->codec_tag = tag = avio_rl32(pb);
303  st->codecpar->codec_id = ff_codec_get_id(dsd_codec_tags, tag);
304  if (!st->codecpar->codec_id) {
305  av_log(s, AV_LOG_ERROR, "'%s' compression is not supported\n",
306  av_fourcc2str(tag));
307  return AVERROR_PATCHWELCOME;
308  }
309  break;
310 
311  case MKTAG('F','S',' ',' '):
312  if (size < 4)
313  return AVERROR_INVALIDDATA;
314  st->codecpar->sample_rate = avio_rb32(pb) / 8;
315  break;
316 
317  case MKTAG('I','D','3',' '):
318  ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, size);
319  if (id3v2_extra_meta) {
320  if ((ret = ff_id3v2_parse_apic(s, id3v2_extra_meta)) < 0 ||
321  (ret = ff_id3v2_parse_chapters(s, id3v2_extra_meta)) < 0) {
322  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
323  return ret;
324  }
325  ff_id3v2_free_extra_meta(&id3v2_extra_meta);
326  }
327 
328  if (size < avio_tell(pb) - orig_pos) {
329  av_log(s, AV_LOG_ERROR, "id3 exceeds chunk size\n");
330  return AVERROR_INVALIDDATA;
331  }
332  break;
333 
334  case MKTAG('L','S','C','O'):
335  if (size < 2)
336  return AVERROR_INVALIDDATA;
337  config = avio_rb16(pb);
338  if (config != 0xFFFF) {
339  if (config < FF_ARRAY_ELEMS(dsd_loudspeaker_config))
340  st->codecpar->ch_layout = dsd_loudspeaker_config[config];
341  if (!st->codecpar->ch_layout.nb_channels)
342  avpriv_request_sample(s, "loudspeaker configuration %d", config);
343  }
344  break;
345  }
346 
347  avio_skip(pb, size - (avio_tell(pb) - orig_pos) + (size & 1));
348  }
349 
350  return 0;
351 }
352 
353  static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
354 {
355  IffDemuxContext *iff = s->priv_data;
356  AVIOContext *pb = s->pb;
357  uint32_t chunk_id;
358  uint64_t chunk_pos, data_pos, data_size;
359  int ret = AVERROR_EOF;
360 
361  while (!avio_feof(pb)) {
362  chunk_pos = avio_tell(pb);
363  if (chunk_pos >= iff->body_end)
364  return AVERROR_EOF;
365 
366  chunk_id = avio_rl32(pb);
367  data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
368  data_pos = avio_tell(pb);
369 
370  if (data_size < 1 || data_size >= INT64_MAX)
371  return AVERROR_INVALIDDATA;
372 
373  switch (chunk_id) {
374  case ID_DSTF:
375  if (!pkt) {
376  iff->body_pos = avio_tell(pb) - (iff->is_64bit ? 12 : 8);
377  iff->body_size = iff->body_end - iff->body_pos;
378  return 0;
379  }
380  ret = av_get_packet(pb, pkt, data_size);
381  if (ret < 0)
382  return ret;
383  if (data_size & 1)
384  avio_skip(pb, 1);
385  pkt->flags |= AV_PKT_FLAG_KEY;
386  pkt->stream_index = 0;
387  pkt->duration = s->streams[0]->codecpar->sample_rate / 75;
388  pkt->pos = chunk_pos;
389 
390  chunk_pos = avio_tell(pb);
391  if (chunk_pos >= iff->body_end)
392  return 0;
393 
394  avio_seek(pb, chunk_pos, SEEK_SET);
395  return 0;
396 
397  case ID_FRTE:
398  if (data_size < 4)
399  return AVERROR_INVALIDDATA;
400  s->streams[0]->duration = avio_rb32(pb) * (uint64_t)s->streams[0]->codecpar->sample_rate / 75;
401 
402  break;
403  }
404 
405  avio_skip(pb, data_size - (avio_tell(pb) - data_pos) + (data_size & 1));
406  }
407 
408  return ret;
409 }
410 
411  static const uint8_t deep_rgb24[] = {0, 0, 0, 3, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
412  static const uint8_t deep_rgba[] = {0, 0, 0, 4, 0, 1, 0, 8, 0, 2, 0, 8, 0, 3, 0, 8};
413  static const uint8_t deep_bgra[] = {0, 0, 0, 4, 0, 3, 0, 8, 0, 2, 0, 8, 0, 1, 0, 8};
414  static const uint8_t deep_argb[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 1, 0, 8, 0, 2, 0, 8};
415  static const uint8_t deep_abgr[] = {0, 0, 0, 4, 0,17, 0, 8, 0, 3, 0, 8, 0, 2, 0, 8};
416 
417  static int iff_read_header(AVFormatContext *s)
418 {
419  IffDemuxContext *iff = s->priv_data;
420  AVIOContext *pb = s->pb;
421  AVStream *st;
422  uint8_t *buf;
423  uint32_t chunk_id;
424  uint64_t data_size;
425  uint32_t screenmode = 0, num, den;
426  unsigned transparency = 0;
427  unsigned masking = 0; // no mask
428  uint8_t fmt[16];
429  int fmt_size;
430 
431  st = avformat_new_stream(s, NULL);
432  if (!st)
433  return AVERROR(ENOMEM);
434 
435  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
436  iff->is_64bit = avio_rl32(pb) == ID_FRM8;
437  avio_skip(pb, iff->is_64bit ? 8 : 4);
438  // codec_tag used by ByteRun1 decoder to distinguish progressive (PBM) and interlaced (ILBM) content
439  st->codecpar->codec_tag = avio_rl32(pb);
440  if (st->codecpar->codec_tag == ID_ANIM) {
441  avio_skip(pb, 12);
442  }
443  iff->bitmap_compression = -1;
444  iff->svx8_compression = -1;
445  iff->maud_bits = -1;
446  iff->maud_compression = -1;
447 
448  while(!avio_feof(pb)) {
449  uint64_t orig_pos;
450  int res;
451  const char *metadata_tag = NULL;
452  int version, nb_comments, i;
453  chunk_id = avio_rl32(pb);
454  data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb);
455  orig_pos = avio_tell(pb);
456 
457  if (data_size >= INT64_MAX)
458  return AVERROR_INVALIDDATA;
459 
460  switch(chunk_id) {
461  case ID_VHDR:
462  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
463 
464  if (data_size < 14)
465  return AVERROR_INVALIDDATA;
466  avio_skip(pb, 12);
467  st->codecpar->sample_rate = avio_rb16(pb);
468  if (data_size >= 16) {
469  avio_skip(pb, 1);
470  iff->svx8_compression = avio_r8(pb);
471  }
472  break;
473 
474  case ID_MHDR:
475  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
476 
477  if (data_size < 32)
478  return AVERROR_INVALIDDATA;
479  avio_skip(pb, 4);
480  iff->maud_bits = avio_rb16(pb);
481  avio_skip(pb, 2);
482  num = avio_rb32(pb);
483  den = avio_rb16(pb);
484  if (!den)
485  return AVERROR_INVALIDDATA;
486  avio_skip(pb, 2);
487  st->codecpar->sample_rate = num / den;
488  st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
489  st->codecpar->ch_layout.nb_channels = avio_rb16(pb);
490  iff->maud_compression = avio_rb16(pb);
491  if (st->codecpar->ch_layout.nb_channels == 1)
492  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
493  else if (st->codecpar->ch_layout.nb_channels == 2)
494  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
495  break;
496 
497  case ID_ABIT:
498  case ID_BODY:
499  case ID_DBOD:
500  case ID_DSD:
501  case ID_DST:
502  case ID_MDAT:
503  iff->body_pos = avio_tell(pb);
504  iff->body_end = iff->body_pos + data_size;
505  iff->body_size = data_size;
506  if (chunk_id == ID_DST) {
507  int ret = read_dst_frame(s, NULL);
508  if (ret < 0)
509  return ret;
510  }
511  break;
512 
513  case ID_CHAN:
514  if (data_size < 4)
515  return AVERROR_INVALIDDATA;
516  if (avio_rb32(pb) < 6) {
517  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO;
518  } else {
519  st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
520  }
521  break;
522 
523  case ID_CAMG:
524  if (data_size < 4)
525  return AVERROR_INVALIDDATA;
526  screenmode = avio_rb32(pb);
527  break;
528 
529  case ID_CMAP:
530  if (data_size < 3 || data_size > 768 || data_size % 3) {
531  av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %"PRIu64"\n",
532  data_size);
533  return AVERROR_INVALIDDATA;
534  }
535  res = ff_alloc_extradata(st->codecpar,
536  data_size + IFF_EXTRA_VIDEO_SIZE);
537  if (res < 0)
538  return res;
539  if (avio_read(pb, st->codecpar->extradata + IFF_EXTRA_VIDEO_SIZE, data_size) < 0) {
540  av_freep(&st->codecpar->extradata);
541  st->codecpar->extradata_size = 0;
542  return AVERROR(EIO);
543  }
544  break;
545 
546  case ID_BMHD:
547  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
548  if (data_size <= 8)
549  return AVERROR_INVALIDDATA;
550  st->codecpar->width = avio_rb16(pb);
551  st->codecpar->height = avio_rb16(pb);
552  avio_skip(pb, 4); // x, y offset
553  st->codecpar->bits_per_coded_sample = avio_r8(pb);
554  if (data_size >= 10)
555  masking = avio_r8(pb);
556  if (data_size >= 11)
557  iff->bitmap_compression = avio_r8(pb);
558  if (data_size >= 14) {
559  avio_skip(pb, 1); // padding
560  transparency = avio_rb16(pb);
561  }
562  if (data_size >= 16) {
563  st->sample_aspect_ratio.num = avio_r8(pb);
564  st->sample_aspect_ratio.den = avio_r8(pb);
565  }
566  break;
567 
568  case ID_ANHD:
569  break;
570 
571  case ID_DPAN:
572  avio_skip(pb, 2);
573  st->duration = avio_rb16(pb);
574  break;
575 
576  case ID_DPEL:
577  if (data_size < 4 || (data_size & 3))
578  return AVERROR_INVALIDDATA;
579  if ((fmt_size = avio_read(pb, fmt, sizeof(fmt))) < 0)
580  return fmt_size;
581  if (fmt_size == sizeof(deep_rgb24) && !memcmp(fmt, deep_rgb24, sizeof(deep_rgb24)))
582  st->codecpar->format = AV_PIX_FMT_RGB24;
583  else if (fmt_size == sizeof(deep_rgba) && !memcmp(fmt, deep_rgba, sizeof(deep_rgba)))
584  st->codecpar->format = AV_PIX_FMT_RGBA;
585  else if (fmt_size == sizeof(deep_bgra) && !memcmp(fmt, deep_bgra, sizeof(deep_bgra)))
586  st->codecpar->format = AV_PIX_FMT_BGRA;
587  else if (fmt_size == sizeof(deep_argb) && !memcmp(fmt, deep_argb, sizeof(deep_argb)))
588  st->codecpar->format = AV_PIX_FMT_ARGB;
589  else if (fmt_size == sizeof(deep_abgr) && !memcmp(fmt, deep_abgr, sizeof(deep_abgr)))
590  st->codecpar->format = AV_PIX_FMT_ABGR;
591  else {
592  avpriv_request_sample(s, "color format %.16s", fmt);
593  return AVERROR_PATCHWELCOME;
594  }
595  break;
596 
597  case ID_DGBL:
598  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
599  if (data_size < 8)
600  return AVERROR_INVALIDDATA;
601  st->codecpar->width = avio_rb16(pb);
602  st->codecpar->height = avio_rb16(pb);
603  iff->bitmap_compression = avio_rb16(pb);
604  st->sample_aspect_ratio.num = avio_r8(pb);
605  st->sample_aspect_ratio.den = avio_r8(pb);
606  st->codecpar->bits_per_coded_sample = 24;
607  break;
608 
609  case ID_DLOC:
610  if (data_size < 4)
611  return AVERROR_INVALIDDATA;
612  st->codecpar->width = avio_rb16(pb);
613  st->codecpar->height = avio_rb16(pb);
614  break;
615 
616  case ID_TVDC:
617  if (data_size < sizeof(iff->tvdc))
618  return AVERROR_INVALIDDATA;
619  res = avio_read(pb, iff->tvdc, sizeof(iff->tvdc));
620  if (res < 0)
621  return res;
622  break;
623 
624  case ID_ANNO:
625  case ID_TEXT: metadata_tag = "comment"; break;
626  case ID_AUTH: metadata_tag = "artist"; break;
627  case ID_COPYRIGHT: metadata_tag = "copyright"; break;
628  case ID_NAME: metadata_tag = "title"; break;
629 
630  /* DSD tags */
631 
632  case MKTAG('F','V','E','R'):
633  if (data_size < 4)
634  return AVERROR_INVALIDDATA;
635  version = avio_rb32(pb);
636  av_log(s, AV_LOG_DEBUG, "DSIFF v%d.%d.%d.%d\n",version >> 24, (version >> 16) & 0xFF, (version >> 8) & 0xFF, version & 0xFF);
637  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
638  break;
639 
640  case MKTAG('D','I','I','N'):
641  res = parse_dsd_diin(s, st, orig_pos + data_size);
642  if (res < 0)
643  return res;
644  break;
645 
646  case MKTAG('P','R','O','P'):
647  if (data_size < 4)
648  return AVERROR_INVALIDDATA;
649  if (avio_rl32(pb) != MKTAG('S','N','D',' ')) {
650  avpriv_request_sample(s, "unknown property type");
651  break;
652  }
653  res = parse_dsd_prop(s, st, orig_pos + data_size);
654  if (res < 0)
655  return res;
656  break;
657 
658  case MKTAG('C','O','M','T'):
659  if (data_size < 2)
660  return AVERROR_INVALIDDATA;
661  nb_comments = avio_rb16(pb);
662  for (i = 0; i < nb_comments; i++) {
663  int year, mon, day, hour, min, type, ref;
664  char tmp[24];
665  const char *tag;
666  int metadata_size;
667 
668  year = avio_rb16(pb);
669  mon = avio_r8(pb);
670  day = avio_r8(pb);
671  hour = avio_r8(pb);
672  min = avio_r8(pb);
673  snprintf(tmp, sizeof(tmp), "%04d-%02d-%02d %02d:%02d", year, mon, day, hour, min);
674  av_dict_set(&st->metadata, "comment_time", tmp, 0);
675 
676  type = avio_rb16(pb);
677  ref = avio_rb16(pb);
678  switch (type) {
679  case 1:
680  if (!i)
681  tag = "channel_comment";
682  else {
683  snprintf(tmp, sizeof(tmp), "channel%d_comment", ref);
684  tag = tmp;
685  }
686  break;
687  case 2:
688  tag = ref < FF_ARRAY_ELEMS(dsd_source_comment) ? dsd_source_comment[ref] : "source_comment";
689  break;
690  case 3:
691  tag = ref < FF_ARRAY_ELEMS(dsd_history_comment) ? dsd_history_comment[ref] : "file_history";
692  break;
693  default:
694  tag = "comment";
695  }
696 
697  metadata_size = avio_rb32(pb);
698  if ((res = get_metadata(s, tag, metadata_size)) < 0) {
699  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", tag);
700  return res;
701  }
702 
703  if (metadata_size & 1)
704  avio_skip(pb, 1);
705  }
706  break;
707  }
708 
709  if (metadata_tag) {
710  if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
711  av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!\n", metadata_tag);
712  return res;
713  }
714  }
715  avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
716  }
717 
718  if (st->codecpar->codec_tag == ID_ANIM)
719  avio_seek(pb, 12, SEEK_SET);
720  else
721  avio_seek(pb, iff->body_pos, SEEK_SET);
722 
723  switch(st->codecpar->codec_type) {
724  case AVMEDIA_TYPE_AUDIO:
725  avpriv_set_pts_info(st, 32, 1, st->codecpar->sample_rate);
726 
727  if (st->codecpar->codec_tag == ID_16SV)
728  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE_PLANAR;
729  else if (st->codecpar->codec_tag == ID_MAUD) {
730  if (iff->maud_bits == 8 && !iff->maud_compression) {
731  st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
732  } else if (iff->maud_bits == 16 && !iff->maud_compression) {
733  st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE;
734  } else if (iff->maud_bits == 8 && iff->maud_compression == 2) {
735  st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
736  } else if (iff->maud_bits == 8 && iff->maud_compression == 3) {
737  st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
738  } else {
739  avpriv_request_sample(s, "compression %d and bit depth %d", iff->maud_compression, iff->maud_bits);
740  return AVERROR_PATCHWELCOME;
741  }
742  } else if (st->codecpar->codec_tag != ID_DSD &&
743  st->codecpar->codec_tag != ID_DST) {
744  switch (iff->svx8_compression) {
745  case COMP_NONE:
746  st->codecpar->codec_id = AV_CODEC_ID_PCM_S8_PLANAR;
747  break;
748  case COMP_FIB:
749  st->codecpar->codec_id = AV_CODEC_ID_8SVX_FIB;
750  break;
751  case COMP_EXP:
752  st->codecpar->codec_id = AV_CODEC_ID_8SVX_EXP;
753  break;
754  default:
755  av_log(s, AV_LOG_ERROR,
756  "Unknown SVX8 compression method '%d'\n", iff->svx8_compression);
757  return -1;
758  }
759  }
760 
761  st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
762  st->codecpar->bit_rate = (int64_t)st->codecpar->ch_layout.nb_channels *
763  st->codecpar->sample_rate *
764  st->codecpar->bits_per_coded_sample;
765  st->codecpar->block_align = st->codecpar->ch_layout.nb_channels *
766  st->codecpar->bits_per_coded_sample;
767  if ((st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) && st->codecpar->block_align <= 0)
768  return AVERROR_INVALIDDATA;
769  break;
770 
771  case AVMEDIA_TYPE_VIDEO:
772  iff->bpp = st->codecpar->bits_per_coded_sample;
773  if (st->codecpar->codec_tag == ID_ANIM)
774  avpriv_set_pts_info(st, 32, 1, 60);
775  if ((screenmode & 0x800 /* Hold And Modify */) && iff->bpp <= 8) {
776  iff->ham = iff->bpp > 6 ? 6 : 4;
777  st->codecpar->bits_per_coded_sample = 24;
778  }
779  iff->flags = (screenmode & 0x80 /* Extra HalfBrite */) && iff->bpp <= 8;
780  iff->masking = masking;
781  iff->transparency = transparency;
782 
783  if (!st->codecpar->extradata) {
784  int ret = ff_alloc_extradata(st->codecpar, IFF_EXTRA_VIDEO_SIZE);
785  if (ret < 0)
786  return ret;
787  }
788  av_assert0(st->codecpar->extradata_size >= IFF_EXTRA_VIDEO_SIZE);
789  buf = st->codecpar->extradata;
790  bytestream_put_be16(&buf, IFF_EXTRA_VIDEO_SIZE);
791  bytestream_put_byte(&buf, iff->bitmap_compression);
792  bytestream_put_byte(&buf, iff->bpp);
793  bytestream_put_byte(&buf, iff->ham);
794  bytestream_put_byte(&buf, iff->flags);
795  bytestream_put_be16(&buf, iff->transparency);
796  bytestream_put_byte(&buf, iff->masking);
797  bytestream_put_buffer(&buf, iff->tvdc, sizeof(iff->tvdc));
798  st->codecpar->codec_id = AV_CODEC_ID_IFF_ILBM;
799  break;
800  default:
801  return -1;
802  }
803 
804  return 0;
805 }
806 
807  static unsigned get_anim_duration(uint8_t *buf, int size)
808 {
809  GetByteContext gb;
810 
811  bytestream2_init(&gb, buf, size);
812  bytestream2_skip(&gb, 4);
813  while (bytestream2_get_bytes_left(&gb) > 8) {
814  unsigned chunk = bytestream2_get_le32(&gb);
815  unsigned size = bytestream2_get_be32(&gb);
816 
817  if (chunk == ID_ANHD) {
818  if (size < 40)
819  break;
820  bytestream2_skip(&gb, 14);
821  return bytestream2_get_be32(&gb);
822  } else {
823  bytestream2_skip(&gb, size + size & 1);
824  }
825  }
826  return 10;
827 }
828 
829  static int iff_read_packet(AVFormatContext *s,
830  AVPacket *pkt)
831 {
832  IffDemuxContext *iff = s->priv_data;
833  AVIOContext *pb = s->pb;
834  AVStream *st = s->streams[0];
835  int ret;
836  int64_t pos = avio_tell(pb);
837 
838  if (avio_feof(pb))
839  return AVERROR_EOF;
840  if (st->codecpar->codec_tag != ID_ANIM && pos >= iff->body_end)
841  return AVERROR_EOF;
842 
843  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
844  if (st->codecpar->codec_tag == ID_DSD || st->codecpar->codec_tag == ID_MAUD) {
845  ret = av_get_packet(pb, pkt, FFMIN(iff->body_end - pos, 1024 * st->codecpar->block_align));
846  } else if (st->codecpar->codec_tag == ID_DST) {
847  return read_dst_frame(s, pkt);
848  } else {
849  if (iff->body_size > INT_MAX || !iff->body_size)
850  return AVERROR_INVALIDDATA;
851  ret = av_get_packet(pb, pkt, iff->body_size);
852  }
853  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
854  st->codecpar->codec_tag == ID_ANIM) {
855  uint64_t data_size, orig_pos;
856  uint32_t chunk_id, chunk_id2;
857 
858  while (!avio_feof(pb)) {
859  if (avio_feof(pb))
860  return AVERROR_EOF;
861 
862  orig_pos = avio_tell(pb);
863  chunk_id = avio_rl32(pb);
864  data_size = avio_rb32(pb);
865  chunk_id2 = avio_rl32(pb);
866 
867  if (chunk_id == ID_FORM &&
868  chunk_id2 == ID_ILBM) {
869  avio_skip(pb, -4);
870  break;
871  } else if (chunk_id == ID_FORM &&
872  chunk_id2 == ID_ANIM) {
873  continue;
874  } else {
875  avio_skip(pb, data_size);
876  }
877  }
878  ret = av_get_packet(pb, pkt, data_size);
879  pkt->pos = orig_pos;
880  pkt->duration = get_anim_duration(pkt->data, pkt->size);
881  if (pos == 12)
882  pkt->flags |= AV_PKT_FLAG_KEY;
883  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
884  st->codecpar->codec_tag != ID_ANIM) {
885  if (iff->body_size > INT_MAX || !iff->body_size)
886  return AVERROR_INVALIDDATA;
887  ret = av_get_packet(pb, pkt, iff->body_size);
888  pkt->pos = pos;
889  if (pos == iff->body_pos)
890  pkt->flags |= AV_PKT_FLAG_KEY;
891  } else {
892  av_assert0(0);
893  }
894 
895  if (ret < 0)
896  return ret;
897  pkt->stream_index = 0;
898  return ret;
899 }
900 
901  const AVInputFormat ff_iff_demuxer = {
902  .name = "iff",
903  .long_name = NULL_IF_CONFIG_SMALL("IFF (Interchange File Format)"),
904  .priv_data_size = sizeof(IffDemuxContext),
905  .read_probe = iff_probe,
906  .read_header = iff_read_header,
907  .read_packet = iff_read_packet,
908  .flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
909 };
IffDemuxContext::svx8_compression
svx8_compression_type svx8_compression
Definition: iff.c:113
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:75
AVFMT_NO_BYTE_SEEK
#define AVFMT_NO_BYTE_SEEK
Format does not allow seeking by bytes.
Definition: avformat.h:489
AVERROR
Filter the word "frame" indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
deep_argb
static const uint8_t deep_argb[]
Definition: iff.c:414
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
ID_BODY
#define ID_BODY
Definition: iff.c:82
ID_CMAP
#define ID_CMAP
Definition: iff.c:56
GetByteContext
Definition: bytestream.h:33
AV_CHANNEL_LAYOUT_5POINT1
#define AV_CHANNEL_LAYOUT_5POINT1
Definition: channel_layout.h:364
ID_PBM
#define ID_PBM
Definition: iff.c:51
ID_RGBN
#define ID_RGBN
Definition: iff.c:60
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AV_CODEC_ID_8SVX_EXP
@ AV_CODEC_ID_8SVX_EXP
Definition: codec_id.h:481
ID_CHAN
#define ID_CHAN
Definition: iff.c:50
ID_DEEP
#define ID_DEEP
Definition: iff.c:58
ID_DSTF
#define ID_DSTF
Definition: iff.c:64
id3v2.h
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
DSD_MRGT
#define DSD_MRGT
Definition: iff.c:175
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CODEC_ID_PCM_S16BE_PLANAR
@ AV_CODEC_ID_PCM_S16BE_PLANAR
Definition: codec_id.h:348
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
ff_id3v2_read
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.
Definition: id3v2.c:1136
deep_bgra
static const uint8_t deep_bgra[]
Definition: iff.c:413
IffDemuxContext::masking
unsigned masking
masking method used
Definition: iff.c:121
AV_PIX_FMT_BGRA
@ AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:354
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:65
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:295
get_anim_duration
static unsigned get_anim_duration(uint8_t *buf, int size)
Definition: iff.c:807
IffDemuxContext::body_size
uint32_t body_size
Definition: iff.c:112
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
ID_ILBM
#define ID_ILBM
Definition: iff.c:52
tf_sess_config.config
config
Definition: tf_sess_config.py:33
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
COMP_NONE
@ COMP_NONE
Definition: iff.c:103
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
AV_CHANNEL_LAYOUT_5POINT0
#define AV_CHANNEL_LAYOUT_5POINT0
Definition: channel_layout.h:363
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:697
ID_DGBL
#define ID_DGBL
Definition: iff.c:54
ID_TEXT
#define ID_TEXT
Definition: iff.c:80
AV_CODEC_ID_IFF_ILBM
@ AV_CODEC_ID_IFF_ILBM
Definition: codec_id.h:186
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:319
ID_DBOD
#define ID_DBOD
Definition: iff.c:83
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:505
AVFMT_GENERIC_INDEX
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:482
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
dsd_source_comment
static const char * dsd_source_comment[]
Definition: iff.c:202
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
AV_CODEC_ID_8SVX_FIB
@ AV_CODEC_ID_8SVX_FIB
Definition: codec_id.h:482
AVRational::num
int num
Numerator.
Definition: rational.h:59
ID_FORM
#define ID_FORM
Definition: iff.c:71
parse_dsd_prop
static int parse_dsd_prop(AVFormatContext *s, AVStream *st, uint64_t eof)
Definition: iff.c:249
ff_id3v2_parse_chapters
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1189
AV_DICT_DONT_STRDUP_VAL
#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:72
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:586
avassert.h
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:656
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
AVCodecTag
Definition: internal.h:50
ID3v2ExtraMeta
Definition: id3v2.h:84
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
DSD_RS
#define DSD_RS
Definition: iff.c:178
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
iff_read_header
static int iff_read_header(AVFormatContext *s)
Definition: iff.c:417
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AV_CHANNEL_ORDER_UNSPEC
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
Definition: channel_layout.h:106
iff_read_packet
static int iff_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: iff.c:829
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:127
IffDemuxContext::tvdc
uint8_t tvdc[32]
TVDC lookup table.
Definition: iff.c:122
DSD_C
#define DSD_C
Definition: iff.c:176
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ID_DPEL
#define ID_DPEL
Definition: iff.c:84
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ID_8SVX
#define ID_8SVX
Definition: iff.c:42
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:324
ID_AUTH
#define ID_AUTH
Definition: iff.c:74
ID_BMHD
#define ID_BMHD
Definition: iff.c:53
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
if
if(ret)
Definition: filter_design.txt:179
DSD_SRGT
#define DSD_SRGT
Definition: iff.c:173
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:325
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:532
DSD_LFE
#define DSD_LFE
Definition: iff.c:179
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AV_CODEC_ID_DST
@ AV_CODEC_ID_DST
Definition: codec_id.h:508
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
ID_FRTE
#define ID_FRTE
Definition: iff.c:65
ff_id3v2_parse_apic
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:1158
avio_rb64
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:937
dsd_codec_tags
static const AVCodecTag dsd_codec_tags[]
Definition: iff.c:165
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:1019
IffDemuxContext
Definition: iff.c:108
ID_ACBM
#define ID_ACBM
Definition: iff.c:57
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
AV_PIX_FMT_ABGR
@ AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
ID_DPAN
#define ID_DPAN
Definition: iff.c:69
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:79
ID_ABIT
#define ID_ABIT
Definition: iff.c:81
dsd_history_comment
static const char * dsd_history_comment[]
Definition: iff.c:208
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
IffDemuxContext::flags
unsigned flags
1 for EHB, 0 is no extra half darkening
Definition: iff.c:119
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:144
iff_probe
static int iff_probe(const AVProbeData *p)
Definition: iff.c:145
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
AV_CODEC_ID_DSD_MSBF
@ AV_CODEC_ID_DSD_MSBF
Definition: codec_id.h:501
ID_ANIM
#define ID_ANIM
Definition: iff.c:66
size
int size
Definition: twinvq_data.h:10344
ID3v2_DEFAULT_MAGIC
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
ID_CAMG
#define ID_CAMG
Definition: iff.c:55
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:1017
read_dst_frame
static int read_dst_frame(AVFormatContext *s, AVPacket *pkt)
Definition: iff.c:353
ID_MHDR
#define ID_MHDR
Definition: iff.c:45
DSD_MLFT
#define DSD_MLFT
Definition: iff.c:174
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:632
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
version
version
Definition: libkvazaar.c:313
ID_FRM8
#define ID_FRM8
Definition: iff.c:72
deep_rgb24
static const uint8_t deep_rgb24[]
Definition: iff.c:411
DSDLayoutDesc::layout
AVChannelLayout layout
Definition: iff.c:186
AV_PIX_FMT_ARGB
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
COMP_FIB
@ COMP_FIB
Definition: iff.c:104
IffDemuxContext::pts
int64_t pts
Definition: iff.c:123
IffDemuxContext::maud_bits
unsigned maud_bits
Definition: iff.c:114
bytestream_put_buffer
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:372
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
get_metadata
static int get_metadata(AVFormatContext *s, const char *const tag, const unsigned data_size)
Definition: iff.c:127
AVCodecParameters::height
int height
Definition: codec_par.h:128
ID_RGB8
#define ID_RGB8
Definition: iff.c:59
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:184
ID_DST
#define ID_DST
Definition: iff.c:62
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
IffDemuxContext::bitmap_compression
unsigned bitmap_compression
delta compression method used
Definition: iff.c:116
IffDemuxContext::body_pos
int64_t body_pos
Definition: iff.c:110
ID_VHDR
#define ID_VHDR
Definition: iff.c:47
ID_DLOC
#define ID_DLOC
Definition: iff.c:85
ID_DSD
#define ID_DSD
Definition: iff.c:61
av_get_packet
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:102
ID_ANHD
#define ID_ANHD
Definition: iff.c:67
tag
uint32_t tag
Definition: movenc.c:1646
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
DSDLayoutDesc::dsd_layout
const uint32_t * dsd_layout
Definition: iff.c:187
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
dict.h
DSD_SLFT
#define DSD_SLFT
Definition: iff.c:172
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
IffDemuxContext::bpp
unsigned bpp
bits per plane to decode (differs from bits_per_coded_sample if HAM)
Definition: iff.c:117
dsd_5point1
static const uint32_t dsd_5point1[]
Definition: iff.c:183
DSD_LS
#define DSD_LS
Definition: iff.c:177
ID_TVDC
#define ID_TVDC
Definition: iff.c:86
channel_layout.h
deep_abgr
static const uint8_t deep_abgr[]
Definition: iff.c:415
parse_dsd_diin
static int parse_dsd_diin(AVFormatContext *s, AVStream *st, uint64_t eof)
Definition: iff.c:216
AVRational::den
int den
Denominator.
Definition: rational.h:60
ID_MDAT
#define ID_MDAT
Definition: iff.c:46
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
ID_MAUD
#define ID_MAUD
Definition: iff.c:44
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:112
AVPacket::stream_index
int stream_index
Definition: packet.h:376
COMP_EXP
@ COMP_EXP
Definition: iff.c:105
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:103
ID_16SV
#define ID_16SV
Definition: iff.c:43
ID_COPYRIGHT
#define ID_COPYRIGHT
Definition: iff.c:76
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:323
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVCodecParameters::format
int format
Definition: codec_par.h:85
IffDemuxContext::ham
unsigned ham
0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
Definition: iff.c:118
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
dsd_5point0
static const uint32_t dsd_5point0[]
Definition: iff.c:182
AVPacket
This structure stores compressed data.
Definition: packet.h:351
svx8_compression_type
svx8_compression_type
Definition: iff.c:102
IFF_EXTRA_VIDEO_SIZE
#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
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
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:70
ff_id3v2_free_extra_meta
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1142
deep_rgba
static const uint8_t deep_rgba[]
Definition: iff.c:412
AVPacket::pos
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:394
AV_CODEC_ID_PCM_S8_PLANAR
@ AV_CODEC_ID_PCM_S8_PLANAR
Definition: codec_id.h:345
d
d
Definition: ffmpeg_filter.c:153
bytestream.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:90
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
IffDemuxContext::transparency
unsigned transparency
transparency color index in palette
Definition: iff.c:120
dsd_loudspeaker_config
static const AVChannelLayout dsd_loudspeaker_config[]
Definition: iff.c:196
dsd_channel_layout
static const DSDLayoutDesc dsd_channel_layout[]
Definition: iff.c:190
IffDemuxContext::body_end
int64_t body_end
Definition: iff.c:111
dsd_stereo
static const uint32_t dsd_stereo[]
Definition: iff.c:181
snprintf
#define snprintf
Definition: snprintf.h:34
ff_iff_demuxer
const AVInputFormat ff_iff_demuxer
Definition: iff.c:901
IffDemuxContext::is_64bit
int is_64bit
chunk size is 64-bit
Definition: iff.c:109
IffDemuxContext::maud_compression
unsigned maud_compression
Definition: iff.c:115
DSDLayoutDesc
Definition: iff.c:185
av_fourcc2str
#define av_fourcc2str(fourcc)
Definition: avutil.h:354
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:238
min
float min
Definition: vorbis_enc_data.h:429
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375
ID_ANNO
#define ID_ANNO
Definition: iff.c:73
ID_NAME
#define ID_NAME
Definition: iff.c:79
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