FFmpeg  4.4
img2dec.c
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1 /*
2  * Image format
3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  * Copyright (c) 2004 Michael Niedermayer
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 #define _DEFAULT_SOURCE
24 #define _BSD_SOURCE
25 #include <sys/stat.h>
26 #include "libavutil/avstring.h"
27 #include "libavutil/log.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "libavutil/parseutils.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavcodec/gif.h"
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "internal.h"
36 #include "img2.h"
37 #include "libavcodec/mjpeg.h"
38 #include "libavcodec/xwd.h"
39 #include "subtitles.h"
40 
41 #if HAVE_GLOB
42 /* Locally define as 0 (bitwise-OR no-op) any missing glob options that
43  are non-posix glibc/bsd extensions. */
44 #ifndef GLOB_NOMAGIC
45 #define GLOB_NOMAGIC 0
46 #endif
47 #ifndef GLOB_BRACE
48 #define GLOB_BRACE 0
49 #endif
50 
51 #endif /* HAVE_GLOB */
52 
53 static const int sizes[][2] = {
54  { 640, 480 },
55  { 720, 480 },
56  { 720, 576 },
57  { 352, 288 },
58  { 352, 240 },
59  { 160, 128 },
60  { 512, 384 },
61  { 640, 352 },
62  { 640, 240 },
63 };
64 
65 static int infer_size(int *width_ptr, int *height_ptr, int size)
66 {
67  int i;
68 
69  for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
70  if ((sizes[i][0] * sizes[i][1]) == size) {
71  *width_ptr = sizes[i][0];
72  *height_ptr = sizes[i][1];
73  return 0;
74  }
75  }
76 
77  return -1;
78 }
79 
80 static int is_glob(const char *path)
81 {
82 #if HAVE_GLOB
83  size_t span = 0;
84  const char *p = path;
85 
86  while (p = strchr(p, '%')) {
87  if (*(++p) == '%') {
88  ++p;
89  continue;
90  }
91  if (span = strspn(p, "*?[]{}"))
92  break;
93  }
94  /* Did we hit a glob char or get to the end? */
95  return span != 0;
96 #else
97  return 0;
98 #endif
99 }
100 
101 /**
102  * Get index range of image files matched by path.
103  *
104  * @param pfirst_index pointer to index updated with the first number in the range
105  * @param plast_index pointer to index updated with the last number in the range
106  * @param path path which has to be matched by the image files in the range
107  * @param start_index minimum accepted value for the first index in the range
108  * @return -1 if no image file could be found
109  */
110 static int find_image_range(AVIOContext *pb, int *pfirst_index, int *plast_index,
111  const char *path, int start_index, int start_index_range)
112 {
113  char buf[1024];
114  int range, last_index, range1, first_index;
115 
116  /* find the first image */
117  for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
118  if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
119  *pfirst_index =
120  *plast_index = 1;
121  if (pb || avio_check(buf, AVIO_FLAG_READ) > 0)
122  return 0;
123  return -1;
124  }
125  if (avio_check(buf, AVIO_FLAG_READ) > 0)
126  break;
127  }
128  if (first_index == start_index + start_index_range)
129  goto fail;
130 
131  /* find the last image */
132  last_index = first_index;
133  for (;;) {
134  range = 0;
135  for (;;) {
136  if (!range)
137  range1 = 1;
138  else
139  range1 = 2 * range;
140  if (av_get_frame_filename(buf, sizeof(buf), path,
141  last_index + range1) < 0)
142  goto fail;
143  if (avio_check(buf, AVIO_FLAG_READ) <= 0)
144  break;
145  range = range1;
146  /* just in case... */
147  if (range >= (1 << 30))
148  goto fail;
149  }
150  /* we are sure than image last_index + range exists */
151  if (!range)
152  break;
153  last_index += range;
154  }
155  *pfirst_index = first_index;
156  *plast_index = last_index;
157  return 0;
158 
159 fail:
160  return -1;
161 }
162 
163 static int img_read_probe(const AVProbeData *p)
164 {
165  if (p->filename && ff_guess_image2_codec(p->filename)) {
167  return AVPROBE_SCORE_MAX;
168  else if (is_glob(p->filename))
169  return AVPROBE_SCORE_MAX;
170  else if (p->filename[strcspn(p->filename, "*?{")]) // probably PT_GLOB
171  return AVPROBE_SCORE_EXTENSION + 2; // score chosen to be a tad above the image pipes
172  else if (p->buf_size == 0)
173  return 0;
174  else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
175  return 5;
176  else
178  }
179  return 0;
180 }
181 
183 {
184  VideoDemuxData *s = s1->priv_data;
185  int first_index = 1, last_index = 1;
186  AVStream *st;
188 
189  s1->ctx_flags |= AVFMTCTX_NOHEADER;
190 
191  st = avformat_new_stream(s1, NULL);
192  if (!st) {
193  return AVERROR(ENOMEM);
194  }
195 
196  if (s->pixel_format &&
197  (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
198  av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
199  s->pixel_format);
200  return AVERROR(EINVAL);
201  }
202 
203  av_strlcpy(s->path, s1->url, sizeof(s->path));
204  s->img_number = 0;
205  s->img_count = 0;
206 
207  /* find format */
208  if (s1->iformat->flags & AVFMT_NOFILE)
209  s->is_pipe = 0;
210  else {
211  s->is_pipe = 1;
213  }
214 
215  if (s->ts_from_file == 2) {
216 #if !HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
217  av_log(s1, AV_LOG_ERROR, "POSIX.1-2008 not supported, nanosecond file timestamps unavailable\n");
218  return AVERROR(ENOSYS);
219 #endif
220  avpriv_set_pts_info(st, 64, 1, 1000000000);
221  } else if (s->ts_from_file)
222  avpriv_set_pts_info(st, 64, 1, 1);
223  else {
224  avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
225  st->avg_frame_rate = s->framerate;
226  }
227 
228  if (s->width && s->height) {
229  st->codecpar->width = s->width;
230  st->codecpar->height = s->height;
231  }
232 
233  if (!s->is_pipe) {
234  if (s->pattern_type == PT_DEFAULT) {
235  if (s1->pb) {
236  s->pattern_type = PT_NONE;
237  } else
238  s->pattern_type = PT_GLOB_SEQUENCE;
239  }
240 
241  if (s->pattern_type == PT_GLOB_SEQUENCE) {
242  s->use_glob = is_glob(s->path);
243  if (s->use_glob) {
244 #if HAVE_GLOB
245  char *p = s->path, *q, *dup;
246  int gerr;
247 #endif
248 
249  av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
250  "use pattern_type 'glob' instead\n");
251 #if HAVE_GLOB
252  dup = q = av_strdup(p);
253  while (*q) {
254  /* Do we have room for the next char and a \ insertion? */
255  if ((p - s->path) >= (sizeof(s->path) - 2))
256  break;
257  if (*q == '%' && strspn(q + 1, "%*?[]{}"))
258  ++q;
259  else if (strspn(q, "\\*?[]{}"))
260  *p++ = '\\';
261  *p++ = *q++;
262  }
263  *p = 0;
264  av_free(dup);
265 
266  gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
267  if (gerr != 0) {
268  return AVERROR(ENOENT);
269  }
270  first_index = 0;
271  last_index = s->globstate.gl_pathc - 1;
272 #endif
273  }
274  }
275  if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
276  if (find_image_range(s1->pb, &first_index, &last_index, s->path,
277  s->start_number, s->start_number_range) < 0) {
279  "Could find no file with path '%s' and index in the range %d-%d\n",
280  s->path, s->start_number, s->start_number + s->start_number_range - 1);
281  return AVERROR(ENOENT);
282  }
283  } else if (s->pattern_type == PT_GLOB) {
284 #if HAVE_GLOB
285  int gerr;
286  gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
287  if (gerr != 0) {
288  return AVERROR(ENOENT);
289  }
290  first_index = 0;
291  last_index = s->globstate.gl_pathc - 1;
292  s->use_glob = 1;
293 #else
295  "Pattern type 'glob' was selected but globbing "
296  "is not supported by this libavformat build\n");
297  return AVERROR(ENOSYS);
298 #endif
299  } else if (s->pattern_type != PT_GLOB_SEQUENCE && s->pattern_type != PT_NONE) {
301  "Unknown value '%d' for pattern_type option\n", s->pattern_type);
302  return AVERROR(EINVAL);
303  }
304  s->img_first = first_index;
305  s->img_last = last_index;
306  s->img_number = first_index;
307  /* compute duration */
308  if (!s->ts_from_file) {
309  st->start_time = 0;
310  st->duration = last_index - first_index + 1;
311  }
312  }
313 
314  if (s1->video_codec_id) {
316  st->codecpar->codec_id = s1->video_codec_id;
317  } else if (s1->audio_codec_id) {
319  st->codecpar->codec_id = s1->audio_codec_id;
320  } else if (s1->iformat->raw_codec_id) {
322  st->codecpar->codec_id = s1->iformat->raw_codec_id;
323  } else {
324  const char *str = strrchr(s->path, '.');
325  s->split_planes = str && !av_strcasecmp(str + 1, "y");
327  if (s1->pb) {
328  int probe_buffer_size = 2048;
329  uint8_t *probe_buffer = av_realloc(NULL, probe_buffer_size + AVPROBE_PADDING_SIZE);
330  const AVInputFormat *fmt = NULL;
331  void *fmt_iter = NULL;
332  AVProbeData pd = { 0 };
333 
334  if (!probe_buffer)
335  return AVERROR(ENOMEM);
336 
337  probe_buffer_size = avio_read(s1->pb, probe_buffer, probe_buffer_size);
338  if (probe_buffer_size < 0) {
339  av_free(probe_buffer);
340  return probe_buffer_size;
341  }
342  memset(probe_buffer + probe_buffer_size, 0, AVPROBE_PADDING_SIZE);
343 
344  pd.buf = probe_buffer;
345  pd.buf_size = probe_buffer_size;
346  pd.filename = s1->url;
347 
348  while ((fmt = av_demuxer_iterate(&fmt_iter))) {
349  if (fmt->read_header != ff_img_read_header ||
350  !fmt->read_probe ||
351  (fmt->flags & AVFMT_NOFILE) ||
352  !fmt->raw_codec_id)
353  continue;
354  if (fmt->read_probe(&pd) > 0) {
355  st->codecpar->codec_id = fmt->raw_codec_id;
356  break;
357  }
358  }
359  if (s1->flags & AVFMT_FLAG_CUSTOM_IO) {
360  avio_seek(s1->pb, 0, SEEK_SET);
361  av_freep(&probe_buffer);
362  } else
363  ffio_rewind_with_probe_data(s1->pb, &probe_buffer, probe_buffer_size);
364  }
365  if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
367  if (st->codecpar->codec_id == AV_CODEC_ID_LJPEG)
369  if (st->codecpar->codec_id == AV_CODEC_ID_ALIAS_PIX) // we cannot distingiush this from BRENDER_PIX
371  }
372  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
374  st->codecpar->format = pix_fmt;
375 
376  return 0;
377 }
378 
379 /**
380  * Add this frame's source path and basename to packet's sidedata
381  * as a dictionary, so it can be used by filters like 'drawtext'.
382  */
383 static int add_filename_as_pkt_side_data(char *filename, AVPacket *pkt) {
384  AVDictionary *d = NULL;
385  char *packed_metadata = NULL;
386  buffer_size_t metadata_len;
387  int ret;
388 
389  av_dict_set(&d, "lavf.image2dec.source_path", filename, 0);
390  av_dict_set(&d, "lavf.image2dec.source_basename", av_basename(filename), 0);
391 
392  packed_metadata = av_packet_pack_dictionary(d, &metadata_len);
393  av_dict_free(&d);
394  if (!packed_metadata)
395  return AVERROR(ENOMEM);
397  packed_metadata, metadata_len);
398  if (ret < 0) {
399  av_freep(&packed_metadata);
400  return ret;
401  }
402  return 0;
403 }
404 
406 {
407  VideoDemuxData *s = s1->priv_data;
408  char filename_bytes[1024];
409  char *filename = filename_bytes;
410  int i, res;
411  int size[3] = { 0 }, ret[3] = { 0 };
412  AVIOContext *f[3] = { NULL };
413  AVCodecParameters *par = s1->streams[0]->codecpar;
414 
415  if (!s->is_pipe) {
416  /* loop over input */
417  if (s->loop && s->img_number > s->img_last) {
418  s->img_number = s->img_first;
419  }
420  if (s->img_number > s->img_last)
421  return AVERROR_EOF;
422  if (s->pattern_type == PT_NONE) {
423  av_strlcpy(filename_bytes, s->path, sizeof(filename_bytes));
424  } else if (s->use_glob) {
425 #if HAVE_GLOB
426  filename = s->globstate.gl_pathv[s->img_number];
427 #endif
428  } else {
429  if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
430  s->path,
431  s->img_number) < 0 && s->img_number > 1)
432  return AVERROR(EIO);
433  }
434  for (i = 0; i < 3; i++) {
435  if (s1->pb &&
436  !strcmp(filename_bytes, s->path) &&
437  !s->loop &&
438  !s->split_planes) {
439  f[i] = s1->pb;
440  } else if (s1->io_open(s1, &f[i], filename, AVIO_FLAG_READ, NULL) < 0) {
441  if (i >= 1)
442  break;
443  av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
444  filename);
445  return AVERROR(EIO);
446  }
447  size[i] = avio_size(f[i]);
448 
449  if (!s->split_planes)
450  break;
451  filename[strlen(filename) - 1] = 'U' + i;
452  }
453 
454  if (par->codec_id == AV_CODEC_ID_NONE) {
455  AVProbeData pd = { 0 };
456  const AVInputFormat *ifmt;
458  int ret;
459  int score = 0;
460 
461  ret = avio_read(f[0], header, PROBE_BUF_MIN);
462  if (ret < 0)
463  return ret;
464  memset(header + ret, 0, sizeof(header) - ret);
465  avio_skip(f[0], -ret);
466  pd.buf = header;
467  pd.buf_size = ret;
468  pd.filename = filename;
469 
470  ifmt = av_probe_input_format3(&pd, 1, &score);
471  if (ifmt && ifmt->read_packet == ff_img_read_packet && ifmt->raw_codec_id)
472  par->codec_id = ifmt->raw_codec_id;
473  }
474 
475  if (par->codec_id == AV_CODEC_ID_RAWVIDEO && !par->width)
476  infer_size(&par->width, &par->height, size[0]);
477  } else {
478  f[0] = s1->pb;
479  if (avio_feof(f[0]) && s->loop && s->is_pipe)
480  avio_seek(f[0], 0, SEEK_SET);
481  if (avio_feof(f[0]))
482  return AVERROR_EOF;
483  if (s->frame_size > 0) {
484  size[0] = s->frame_size;
485  } else if (!s1->streams[0]->parser) {
486  size[0] = avio_size(s1->pb);
487  } else {
488  size[0] = 4096;
489  }
490  }
491 
492  res = av_new_packet(pkt, size[0] + size[1] + size[2]);
493  if (res < 0) {
494  goto fail;
495  }
496  pkt->stream_index = 0;
498  if (s->ts_from_file) {
499  struct stat img_stat;
500  if (stat(filename, &img_stat)) {
501  res = AVERROR(EIO);
502  goto fail;
503  }
504  pkt->pts = (int64_t)img_stat.st_mtime;
506  if (s->ts_from_file == 2)
507  pkt->pts = 1000000000*pkt->pts + img_stat.st_mtim.tv_nsec;
508 #endif
509  av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
510  } else if (!s->is_pipe) {
511  pkt->pts = s->pts;
512  }
513 
514  if (s->is_pipe)
515  pkt->pos = avio_tell(f[0]);
516 
517  /*
518  * export_path_metadata must be explicitly enabled via
519  * command line options for path metadata to be exported
520  * as packet side_data.
521  */
522  if (!s->is_pipe && s->export_path_metadata == 1) {
523  res = add_filename_as_pkt_side_data(filename, pkt);
524  if (res < 0)
525  goto fail;
526  }
527 
528  pkt->size = 0;
529  for (i = 0; i < 3; i++) {
530  if (f[i]) {
531  ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
532  if (s->loop && s->is_pipe && ret[i] == AVERROR_EOF) {
533  if (avio_seek(f[i], 0, SEEK_SET) >= 0) {
534  pkt->pos = 0;
535  ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
536  }
537  }
538  if (!s->is_pipe && f[i] != s1->pb)
539  ff_format_io_close(s1, &f[i]);
540  if (ret[i] > 0)
541  pkt->size += ret[i];
542  }
543  }
544 
545  if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
546  if (ret[0] < 0) {
547  res = ret[0];
548  } else if (ret[1] < 0) {
549  res = ret[1];
550  } else if (ret[2] < 0) {
551  res = ret[2];
552  } else {
553  res = AVERROR_EOF;
554  }
555  goto fail;
556  } else {
557  s->img_count++;
558  s->img_number++;
559  s->pts++;
560  return 0;
561  }
562 
563 fail:
564  if (!s->is_pipe) {
565  for (i = 0; i < 3; i++) {
566  if (f[i] != s1->pb)
567  ff_format_io_close(s1, &f[i]);
568  }
569  }
570  return res;
571 }
572 
573 static int img_read_close(struct AVFormatContext* s1)
574 {
575 #if HAVE_GLOB
576  VideoDemuxData *s = s1->priv_data;
577  if (s->use_glob) {
578  globfree(&s->globstate);
579  }
580 #endif
581  return 0;
582 }
583 
584 static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
585 {
586  VideoDemuxData *s1 = s->priv_data;
587  AVStream *st = s->streams[0];
588 
589  if (s1->ts_from_file) {
590  int index = av_index_search_timestamp(st, timestamp, flags);
591  if(index < 0)
592  return -1;
593  s1->img_number = st->index_entries[index].pos;
594  return 0;
595  }
596 
597  if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
598  return -1;
599  s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
600  s1->pts = timestamp;
601  return 0;
602 }
603 
604 #define OFFSET(x) offsetof(VideoDemuxData, x)
605 #define DEC AV_OPT_FLAG_DECODING_PARAM
606 #define COMMON_OPTIONS \
607  { "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC }, \
608  { "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, \
609  { "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC }, \
610  { "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, DEC }, \
611  { NULL },
612 
613 #if CONFIG_IMAGE2_DEMUXER
614 const AVOption ff_img_options[] = {
615  { "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_DEFAULT}, 0, INT_MAX, DEC, "pattern_type"},
616  { "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
617  { "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
618  { "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
619  { "none", "disable pattern matching", 0, AV_OPT_TYPE_CONST, {.i64=PT_NONE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
620  { "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, DEC },
621  { "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
622  { "ts_from_file", "set frame timestamp from file's one", OFFSET(ts_from_file), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
623  { "none", "none", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 2, DEC, "ts_type" },
624  { "sec", "second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 2, DEC, "ts_type" },
625  { "ns", "nano second precision", 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 2, DEC, "ts_type" },
626  { "export_path_metadata", "enable metadata containing input path information", OFFSET(export_path_metadata), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, DEC }, \
627  COMMON_OPTIONS
628 };
629 
630 static const AVClass img2_class = {
631  .class_name = "image2 demuxer",
632  .item_name = av_default_item_name,
633  .option = ff_img_options,
634  .version = LIBAVUTIL_VERSION_INT,
635 };
637  .name = "image2",
638  .long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
639  .priv_data_size = sizeof(VideoDemuxData),
645  .flags = AVFMT_NOFILE,
646  .priv_class = &img2_class,
647 };
648 #endif
649 
651  { "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
653 };
654 
655 #if CONFIG_IMAGE2PIPE_DEMUXER
656 static const AVClass img2pipe_class = {
657  .class_name = "image2pipe demuxer",
658  .item_name = av_default_item_name,
659  .option = ff_img2pipe_options,
660  .version = LIBAVUTIL_VERSION_INT,
661 };
663  .name = "image2pipe",
664  .long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
665  .priv_data_size = sizeof(VideoDemuxData),
668  .priv_class = &img2pipe_class,
669 };
670 #endif
671 
672 static int bmp_probe(const AVProbeData *p)
673 {
674  const uint8_t *b = p->buf;
675  int ihsize;
676 
677  if (AV_RB16(b) != 0x424d)
678  return 0;
679 
680  ihsize = AV_RL32(b+14);
681  if (ihsize < 12 || ihsize > 255)
682  return 0;
683 
684  if (!AV_RN32(b + 6)) {
685  return AVPROBE_SCORE_EXTENSION + 1;
686  }
687  return AVPROBE_SCORE_EXTENSION / 4;
688 }
689 
690 static int cri_probe(const AVProbeData *p)
691 {
692  const uint8_t *b = p->buf;
693 
694  if ( AV_RL32(b) == 1
695  && AV_RL32(b + 4) == 4
696  && AV_RN32(b + 8) == AV_RN32("DVCC"))
697  return AVPROBE_SCORE_MAX - 1;
698  return 0;
699 }
700 
701 static int dds_probe(const AVProbeData *p)
702 {
703  const uint8_t *b = p->buf;
704 
705  if ( AV_RB64(b) == 0x444453207c000000
706  && AV_RL32(b + 8)
707  && AV_RL32(b + 12))
708  return AVPROBE_SCORE_MAX - 1;
709  return 0;
710 }
711 
712 static int dpx_probe(const AVProbeData *p)
713 {
714  const uint8_t *b = p->buf;
715  int w, h;
716  int is_big = (AV_RN32(b) == AV_RN32("SDPX"));
717 
718  if (p->buf_size < 0x304+8)
719  return 0;
720  w = is_big ? AV_RB32(p->buf + 0x304) : AV_RL32(p->buf + 0x304);
721  h = is_big ? AV_RB32(p->buf + 0x308) : AV_RL32(p->buf + 0x308);
722  if (w <= 0 || h <= 0)
723  return 0;
724 
725  if (is_big || AV_RN32(b) == AV_RN32("XPDS"))
726  return AVPROBE_SCORE_EXTENSION + 1;
727  return 0;
728 }
729 
730 static int exr_probe(const AVProbeData *p)
731 {
732  const uint8_t *b = p->buf;
733 
734  if (AV_RL32(b) == 20000630)
735  return AVPROBE_SCORE_EXTENSION + 1;
736  return 0;
737 }
738 
739 static int j2k_probe(const AVProbeData *p)
740 {
741  const uint8_t *b = p->buf;
742 
743  if (AV_RB64(b) == 0x0000000c6a502020 ||
744  AV_RB32(b) == 0xff4fff51)
745  return AVPROBE_SCORE_EXTENSION + 1;
746  return 0;
747 }
748 
749 static int jpeg_probe(const AVProbeData *p)
750 {
751  const uint8_t *b = p->buf;
752  int i, state = SOI;
753 
754  if (AV_RB16(b) != 0xFFD8 ||
755  AV_RB32(b) == 0xFFD8FFF7)
756  return 0;
757 
758  b += 2;
759  for (i = 0; i < p->buf_size - 3; i++) {
760  int c;
761  if (b[i] != 0xFF)
762  continue;
763  c = b[i + 1];
764  switch (c) {
765  case SOI:
766  return 0;
767  case SOF0:
768  case SOF1:
769  case SOF2:
770  case SOF3:
771  case SOF5:
772  case SOF6:
773  case SOF7:
774  i += AV_RB16(&b[i + 2]) + 1;
775  if (state != SOI)
776  return 0;
777  state = SOF0;
778  break;
779  case SOS:
780  i += AV_RB16(&b[i + 2]) + 1;
781  if (state != SOF0 && state != SOS)
782  return 0;
783  state = SOS;
784  break;
785  case EOI:
786  if (state != SOS)
787  return 0;
788  state = EOI;
789  break;
790  case DQT:
791  case APP0:
792  case APP1:
793  case APP2:
794  case APP3:
795  case APP4:
796  case APP5:
797  case APP6:
798  case APP7:
799  case APP8:
800  case APP9:
801  case APP10:
802  case APP11:
803  case APP12:
804  case APP13:
805  case APP14:
806  case APP15:
807  case COM:
808  i += AV_RB16(&b[i + 2]) + 1;
809  break;
810  default:
811  if ( (c > TEM && c < SOF0)
812  || c == JPG)
813  return 0;
814  }
815  }
816 
817  if (state == EOI)
818  return AVPROBE_SCORE_EXTENSION + 1;
819  if (state == SOS)
820  return AVPROBE_SCORE_EXTENSION / 2;
821  return AVPROBE_SCORE_EXTENSION / 8 + 1;
822 }
823 
824 static int jpegls_probe(const AVProbeData *p)
825 {
826  const uint8_t *b = p->buf;
827 
828  if (AV_RB32(b) == 0xffd8fff7)
829  return AVPROBE_SCORE_EXTENSION + 1;
830  return 0;
831 }
832 
833 static int pcx_probe(const AVProbeData *p)
834 {
835  const uint8_t *b = p->buf;
836 
837  if ( p->buf_size < 128
838  || b[0] != 10
839  || b[1] > 5
840  || b[2] > 1
841  || av_popcount(b[3]) != 1 || b[3] > 8
842  || AV_RL16(&b[4]) > AV_RL16(&b[8])
843  || AV_RL16(&b[6]) > AV_RL16(&b[10])
844  || b[64])
845  return 0;
846  b += 73;
847  while (++b < p->buf + 128)
848  if (*b)
849  return AVPROBE_SCORE_EXTENSION / 4;
850 
851  return AVPROBE_SCORE_EXTENSION + 1;
852 }
853 
854 static int qdraw_probe(const AVProbeData *p)
855 {
856  const uint8_t *b = p->buf;
857 
858  if ( p->buf_size >= 528
859  && (AV_RB64(b + 520) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
860  && AV_RB16(b + 520)
861  && AV_RB16(b + 518))
862  return AVPROBE_SCORE_MAX * 3 / 4;
863  if ( (AV_RB64(b + 8) & 0xFFFFFFFFFFFF) == 0x001102ff0c00
864  && AV_RB16(b + 8)
865  && AV_RB16(b + 6))
866  return AVPROBE_SCORE_EXTENSION / 4;
867  return 0;
868 }
869 
870 static int pictor_probe(const AVProbeData *p)
871 {
872  const uint8_t *b = p->buf;
873 
874  if (AV_RL16(b) == 0x1234)
875  return AVPROBE_SCORE_EXTENSION / 4;
876  return 0;
877 }
878 
879 static int png_probe(const AVProbeData *p)
880 {
881  const uint8_t *b = p->buf;
882 
883  if (AV_RB64(b) == 0x89504e470d0a1a0a)
884  return AVPROBE_SCORE_MAX - 1;
885  return 0;
886 }
887 
888 static int psd_probe(const AVProbeData *p)
889 {
890  const uint8_t *b = p->buf;
891  int ret = 0;
892  uint16_t color_mode;
893 
894  if (AV_RL32(b) == MKTAG('8','B','P','S')) {
895  ret += 1;
896  } else {
897  return 0;
898  }
899 
900  if ((b[4] == 0) && (b[5] == 1)) {/* version 1 is PSD, version 2 is PSB */
901  ret += 1;
902  } else {
903  return 0;
904  }
905 
906  if ((AV_RL32(b+6) == 0) && (AV_RL16(b+10) == 0))/* reserved must be 0 */
907  ret += 1;
908 
909  color_mode = AV_RB16(b+24);
910  if ((color_mode <= 9) && (color_mode != 5) && (color_mode != 6))
911  ret += 1;
912 
913  return AVPROBE_SCORE_EXTENSION + ret;
914 }
915 
916 static int sgi_probe(const AVProbeData *p)
917 {
918  const uint8_t *b = p->buf;
919 
920  if (AV_RB16(b) == 474 &&
921  (b[2] & ~1) == 0 &&
922  (b[3] & ~3) == 0 && b[3] &&
923  (AV_RB16(b + 4) & ~7) == 0 && AV_RB16(b + 4))
924  return AVPROBE_SCORE_EXTENSION + 1;
925  return 0;
926 }
927 
928 static int sunrast_probe(const AVProbeData *p)
929 {
930  const uint8_t *b = p->buf;
931 
932  if (AV_RB32(b) == 0x59a66a95)
933  return AVPROBE_SCORE_EXTENSION + 1;
934  return 0;
935 }
936 
937 static int svg_probe(const AVProbeData *p)
938 {
939  const uint8_t *b = p->buf;
940  const uint8_t *end = p->buf + p->buf_size;
941 
942  if (memcmp(p->buf, "<?xml", 5))
943  return 0;
944  while (b < end) {
945  int inc = ff_subtitles_next_line(b);
946  if (!inc)
947  break;
948  b += inc;
949  if (b >= end - 4)
950  return 0;
951  if (!memcmp(b, "<svg", 4))
952  return AVPROBE_SCORE_EXTENSION + 1;
953  }
954  return 0;
955 }
956 
957 static int tiff_probe(const AVProbeData *p)
958 {
959  const uint8_t *b = p->buf;
960 
961  if (AV_RB32(b) == 0x49492a00 ||
962  AV_RB32(b) == 0x4D4D002a)
963  return AVPROBE_SCORE_EXTENSION + 1;
964  return 0;
965 }
966 
967 static int webp_probe(const AVProbeData *p)
968 {
969  const uint8_t *b = p->buf;
970 
971  if (AV_RB32(b) == 0x52494646 &&
972  AV_RB32(b + 8) == 0x57454250)
973  return AVPROBE_SCORE_MAX - 1;
974  return 0;
975 }
976 
977 static int pnm_magic_check(const AVProbeData *p, int magic)
978 {
979  const uint8_t *b = p->buf;
980 
981  return b[0] == 'P' && b[1] == magic + '0';
982 }
983 
984 static inline int pnm_probe(const AVProbeData *p)
985 {
986  const uint8_t *b = p->buf;
987 
988  while (b[2] == '\r')
989  b++;
990  if (b[2] == '\n' && (b[3] == '#' || (b[3] >= '0' && b[3] <= '9')))
991  return AVPROBE_SCORE_EXTENSION + 2;
992  return 0;
993 }
994 
995 static int pbm_probe(const AVProbeData *p)
996 {
997  return pnm_magic_check(p, 1) || pnm_magic_check(p, 4) || pnm_magic_check(p, 22) || pnm_magic_check(p, 54) ? pnm_probe(p) : 0;
998 }
999 
1000 static inline int pgmx_probe(const AVProbeData *p)
1001 {
1002  return pnm_magic_check(p, 2) || pnm_magic_check(p, 5) ? pnm_probe(p) : 0;
1003 }
1004 
1005 static int pgm_probe(const AVProbeData *p)
1006 {
1007  int ret = pgmx_probe(p);
1008  return ret && !av_match_ext(p->filename, "pgmyuv") ? ret : 0;
1009 }
1010 
1011 static int pgmyuv_probe(const AVProbeData *p) // custom FFmpeg format recognized by file extension
1012 {
1013  int ret = pgmx_probe(p);
1014  return ret && av_match_ext(p->filename, "pgmyuv") ? ret : 0;
1015 }
1016 
1017 static int pgx_probe(const AVProbeData *p)
1018 {
1019  const uint8_t *b = p->buf;
1020  if (!memcmp(b, "PG ML ", 6))
1021  return AVPROBE_SCORE_EXTENSION + 1;
1022  return 0;
1023 }
1024 
1025 static int ppm_probe(const AVProbeData *p)
1026 {
1027  return pnm_magic_check(p, 3) || pnm_magic_check(p, 6) ? pnm_probe(p) : 0;
1028 }
1029 
1030 static int pam_probe(const AVProbeData *p)
1031 {
1032  return pnm_magic_check(p, 7) ? pnm_probe(p) : 0;
1033 }
1034 
1035 static int xbm_probe(const AVProbeData *p)
1036 {
1037  if (!memcmp(p->buf, "/* XBM X10 format */", 20))
1038  return AVPROBE_SCORE_MAX;
1039 
1040  if (!memcmp(p->buf, "#define", 7))
1041  return AVPROBE_SCORE_MAX - 1;
1042  return 0;
1043 }
1044 
1045 static int xpm_probe(const AVProbeData *p)
1046 {
1047  const uint8_t *b = p->buf;
1048 
1049  if (AV_RB64(b) == 0x2f2a2058504d202a && *(b+8) == '/')
1050  return AVPROBE_SCORE_MAX - 1;
1051  return 0;
1052 }
1053 
1054 static int xwd_probe(const AVProbeData *p)
1055 {
1056  const uint8_t *b = p->buf;
1057  unsigned width, bpp, bpad, lsize;
1058 
1059  if ( p->buf_size < XWD_HEADER_SIZE
1060  || AV_RB32(b ) < XWD_HEADER_SIZE // header size
1061  || AV_RB32(b + 4) != XWD_VERSION // version
1062  || AV_RB32(b + 8) != XWD_Z_PIXMAP // format
1063  || AV_RB32(b + 12) > 32 || !AV_RB32(b + 12) // depth
1064  || AV_RB32(b + 16) == 0 // width
1065  || AV_RB32(b + 20) == 0 // height
1066  || AV_RB32(b + 28) > 1 // byteorder
1067  || AV_RB32(b + 32) & ~56 || av_popcount(AV_RB32(b + 32)) != 1 // bitmap unit
1068  || AV_RB32(b + 36) > 1 // bitorder
1069  || AV_RB32(b + 40) & ~56 || av_popcount(AV_RB32(b + 40)) != 1 // padding
1070  || AV_RB32(b + 44) > 32 || !AV_RB32(b + 44) // bpp
1071  || AV_RB32(b + 68) > 256) // colours
1072  return 0;
1073 
1074  width = AV_RB32(b + 16);
1075  bpad = AV_RB32(b + 40);
1076  bpp = AV_RB32(b + 44);
1077  lsize = AV_RB32(b + 48);
1078  if (lsize < FFALIGN(width * bpp, bpad) >> 3)
1079  return 0;
1080 
1081  return AVPROBE_SCORE_MAX / 2 + 1;
1082 }
1083 
1084 static int gif_probe(const AVProbeData *p)
1085 {
1086  /* check magick */
1087  if (memcmp(p->buf, gif87a_sig, 6) && memcmp(p->buf, gif89a_sig, 6))
1088  return 0;
1089 
1090  /* width or height contains zero? */
1091  if (!AV_RL16(&p->buf[6]) || !AV_RL16(&p->buf[8]))
1092  return 0;
1093 
1094  return AVPROBE_SCORE_MAX - 1;
1095 }
1096 
1097 static int photocd_probe(const AVProbeData *p)
1098 {
1099  if (!memcmp(p->buf, "PCD_OPA", 7))
1100  return AVPROBE_SCORE_MAX - 1;
1101 
1102  if (p->buf_size < 0x807 || memcmp(p->buf + 0x800, "PCD_IPI", 7))
1103  return 0;
1104 
1105  return AVPROBE_SCORE_MAX - 1;
1106 }
1107 
1108 #define IMAGEAUTO_DEMUXER(imgname, codecid)\
1109 static const AVClass imgname ## _class = {\
1110  .class_name = AV_STRINGIFY(imgname) " demuxer",\
1111  .item_name = av_default_item_name,\
1112  .option = ff_img2pipe_options,\
1113  .version = LIBAVUTIL_VERSION_INT,\
1114 };\
1115 AVInputFormat ff_image_ ## imgname ## _pipe_demuxer = {\
1116  .name = AV_STRINGIFY(imgname) "_pipe",\
1117  .long_name = NULL_IF_CONFIG_SMALL("piped " AV_STRINGIFY(imgname) " sequence"),\
1118  .priv_data_size = sizeof(VideoDemuxData),\
1119  .read_probe = imgname ## _probe,\
1120  .read_header = ff_img_read_header,\
1121  .read_packet = ff_img_read_packet,\
1122  .priv_class = & imgname ## _class,\
1123  .flags = AVFMT_GENERIC_INDEX, \
1124  .raw_codec_id = codecid,\
1125 };
1126 
AVInputFormat ff_image2_demuxer
AVInputFormat ff_image2pipe_demuxer
uint8_t
Main libavformat public API header.
#define AVINDEX_KEYFRAME
Definition: avformat.h:811
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:455
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1177
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:458
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1371
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:794
int avio_check(const char *url, int flags)
Return AVIO_FLAG_* access flags corresponding to the access permissions of the resource in url,...
Definition: avio.c:474
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:342
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
int ffio_rewind_with_probe_data(AVIOContext *s, unsigned char **buf, int buf_size)
Rewind the AVIOContext using the specified buffer containing the first buf_size bytes of the file.
Definition: aviobuf.c:1094
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Definition: avpacket.c:511
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RB32
Definition: intreadwrite.h:130
#define AV_RB16
Definition: intreadwrite.h:53
#define AV_RL32
Definition: intreadwrite.h:146
#define AV_RB64
Definition: intreadwrite.h:164
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define f(width, name)
Definition: cbs_vp9.c:255
static struct @321 state
#define fail()
Definition: checkasm.h:133
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define av_popcount
Definition: common.h:176
#define HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
Definition: config.h:377
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat pix_fmt
static int loop
Definition: ffplay.c:341
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
GIF format definitions.
static const uint8_t gif89a_sig[6]
Definition: gif.h:35
static const uint8_t gif87a_sig[6]
Definition: gif.h:34
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_CODEC_ID_PNG
Definition: codec_id.h:110
@ AV_CODEC_ID_XPM
Definition: codec_id.h:278
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:62
@ AV_CODEC_ID_PSD
Definition: codec_id.h:272
@ AV_CODEC_ID_PICTOR
Definition: codec_id.h:190
@ AV_CODEC_ID_GIF
Definition: codec_id.h:146
@ AV_CODEC_ID_PHOTOCD
Definition: codec_id.h:304
@ AV_CODEC_ID_PGM
Definition: codec_id.h:113
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_PGX
Definition: codec_id.h:244
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:137
@ AV_CODEC_ID_SUNRAST
Definition: codec_id.h:159
@ AV_CODEC_ID_SGI
Definition: codec_id.h:150
@ AV_CODEC_ID_PAM
Definition: codec_id.h:115
@ AV_CODEC_ID_XBM
Definition: codec_id.h:209
@ AV_CODEC_ID_PBM
Definition: codec_id.h:112
@ AV_CODEC_ID_CRI
Definition: codec_id.h:307
@ AV_CODEC_ID_PCX
Definition: codec_id.h:158
@ AV_CODEC_ID_PGMYUV
Definition: codec_id.h:114
@ AV_CODEC_ID_TIFF
Definition: codec_id.h:145
@ AV_CODEC_ID_XWD
Definition: codec_id.h:207
@ AV_CODEC_ID_PPM
Definition: codec_id.h:111
@ AV_CODEC_ID_ALIAS_PIX
Definition: codec_id.h:226
@ AV_CODEC_ID_BMP
Definition: codec_id.h:127
@ AV_CODEC_ID_EXR
Definition: codec_id.h:229
@ AV_CODEC_ID_LJPEG
Definition: codec_id.h:58
@ AV_CODEC_ID_WEBP
Definition: codec_id.h:221
@ AV_CODEC_ID_JPEGLS
Definition: codec_id.h:60
@ AV_CODEC_ID_QDRAW
Definition: codec_id.h:107
@ AV_CODEC_ID_SVG
Definition: codec_id.h:283
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_DPX
Definition: codec_id.h:177
@ AV_CODEC_ID_DDS
Definition: codec_id.h:239
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
FF_ENABLE_DEPRECATION_WARNINGS int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
Definition: avpacket.c:309
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
@ AV_PKT_DATA_STRINGS_METADATA
A list of zero terminated key/value strings.
Definition: packet.h:172
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
const AVInputFormat * av_demuxer_iterate(void **opaque)
Iterate over all registered demuxers.
Definition: allformats.c:558
ff_const59 AVInputFormat * av_probe_input_format3(ff_const59 AVProbeData *pd, int is_opened, int *score_ret)
Guess the file format.
Definition: format.c:128
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2011
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:38
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
Definition: utils.c:4790
int av_filename_number_test(const char *filename)
Check whether filename actually is a numbered sequence generator.
Definition: utils.c:333
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2128
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
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
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:215
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int index
Definition: gxfenc.c:89
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:106
@ PT_NONE
Definition: img2.h:37
@ PT_DEFAULT
Definition: img2.h:38
@ PT_SEQUENCE
Definition: img2.h:36
@ PT_GLOB
Definition: img2.h:35
@ PT_GLOB_SEQUENCE
Definition: img2.h:34
const AVOption ff_img_options[]
static int is_glob(const char *path)
Definition: img2dec.c:80
#define IMAGEAUTO_DEMUXER(imgname, codecid)
Definition: img2dec.c:1108
static int pbm_probe(const AVProbeData *p)
Definition: img2dec.c:995
static int jpegls_probe(const AVProbeData *p)
Definition: img2dec.c:824
static int photocd_probe(const AVProbeData *p)
Definition: img2dec.c:1097
static int xwd_probe(const AVProbeData *p)
Definition: img2dec.c:1054
static int xbm_probe(const AVProbeData *p)
Definition: img2dec.c:1035
static int sgi_probe(const AVProbeData *p)
Definition: img2dec.c:916
static int img_read_close(struct AVFormatContext *s1)
Definition: img2dec.c:573
#define COMMON_OPTIONS
Definition: img2dec.c:606
static int cri_probe(const AVProbeData *p)
Definition: img2dec.c:690
static int exr_probe(const AVProbeData *p)
Definition: img2dec.c:730
static int tiff_probe(const AVProbeData *p)
Definition: img2dec.c:957
static int ppm_probe(const AVProbeData *p)
Definition: img2dec.c:1025
const AVOption ff_img2pipe_options[]
Definition: img2dec.c:650
static int pnm_probe(const AVProbeData *p)
Definition: img2dec.c:984
static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: img2dec.c:584
static int xpm_probe(const AVProbeData *p)
Definition: img2dec.c:1045
static int j2k_probe(const AVProbeData *p)
Definition: img2dec.c:739
static int pgx_probe(const AVProbeData *p)
Definition: img2dec.c:1017
static int psd_probe(const AVProbeData *p)
Definition: img2dec.c:888
static int sunrast_probe(const AVProbeData *p)
Definition: img2dec.c:928
static int dpx_probe(const AVProbeData *p)
Definition: img2dec.c:712
static int pgm_probe(const AVProbeData *p)
Definition: img2dec.c:1005
static int find_image_range(AVIOContext *pb, int *pfirst_index, int *plast_index, const char *path, int start_index, int start_index_range)
Get index range of image files matched by path.
Definition: img2dec.c:110
static const int sizes[][2]
Definition: img2dec.c:53
static int pcx_probe(const AVProbeData *p)
Definition: img2dec.c:833
static int qdraw_probe(const AVProbeData *p)
Definition: img2dec.c:854
static int infer_size(int *width_ptr, int *height_ptr, int size)
Definition: img2dec.c:65
static int add_filename_as_pkt_side_data(char *filename, AVPacket *pkt)
Add this frame's source path and basename to packet's sidedata as a dictionary, so it can be used by ...
Definition: img2dec.c:383
static int bmp_probe(const AVProbeData *p)
Definition: img2dec.c:672
static int pgmyuv_probe(const AVProbeData *p)
Definition: img2dec.c:1011
static int dds_probe(const AVProbeData *p)
Definition: img2dec.c:701
static int svg_probe(const AVProbeData *p)
Definition: img2dec.c:937
int ff_img_read_header(AVFormatContext *s1)
Definition: img2dec.c:182
static int pnm_magic_check(const AVProbeData *p, int magic)
Definition: img2dec.c:977
static int gif_probe(const AVProbeData *p)
Definition: img2dec.c:1084
static int webp_probe(const AVProbeData *p)
Definition: img2dec.c:967
static int pam_probe(const AVProbeData *p)
Definition: img2dec.c:1030
#define OFFSET(x)
Definition: img2dec.c:604
int ff_img_read_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: img2dec.c:405
static int pgmx_probe(const AVProbeData *p)
Definition: img2dec.c:1000
static int pictor_probe(const AVProbeData *p)
Definition: img2dec.c:870
static int img_read_probe(const AVProbeData *p)
Definition: img2dec.c:163
static int jpeg_probe(const AVProbeData *p)
Definition: img2dec.c:749
static int png_probe(const AVProbeData *p)
Definition: img2dec.c:879
#define DEC
Definition: img2dec.c:605
int i
Definition: input.c:407
#define AV_RN32(p)
Definition: intreadwrite.h:364
#define PROBE_BUF_MIN
size of probe buffer, for guessing file type from file contents
Definition: internal.h:33
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:4941
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5688
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
int buffer_size_t
Definition: internal.h:306
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
uint8_t w
Definition: llviddspenc.c:39
#define FFALIGN(x, a)
Definition: macros.h:48
MJPEG encoder and decoder.
@ APP5
Definition: mjpeg.h:84
@ APP15
Definition: mjpeg.h:94
@ APP9
Definition: mjpeg.h:88
@ JPG
Definition: mjpeg.h:47
@ DQT
Definition: mjpeg.h:73
@ SOF5
Definition: mjpeg.h:44
@ SOF2
Definition: mjpeg.h:41
@ APP6
Definition: mjpeg.h:85
@ APP10
Definition: mjpeg.h:89
@ APP1
Definition: mjpeg.h:80
@ SOF1
Definition: mjpeg.h:40
@ SOF6
Definition: mjpeg.h:45
@ APP2
Definition: mjpeg.h:81
@ APP8
Definition: mjpeg.h:87
@ SOS
Definition: mjpeg.h:72
@ SOF7
Definition: mjpeg.h:46
@ APP11
Definition: mjpeg.h:90
@ APP0
Definition: mjpeg.h:79
@ APP13
Definition: mjpeg.h:92
@ TEM
Definition: mjpeg.h:113
@ APP14
Definition: mjpeg.h:93
@ SOI
Definition: mjpeg.h:70
@ EOI
Definition: mjpeg.h:71
@ APP3
Definition: mjpeg.h:82
@ COM
Definition: mjpeg.h:111
@ APP4
Definition: mjpeg.h:83
@ APP7
Definition: mjpeg.h:86
@ SOF3
Definition: mjpeg.h:42
@ SOF0
Definition: mjpeg.h:39
@ APP12
Definition: mjpeg.h:91
int frame_size
Definition: mxfenc.c:2206
AVOptions.
misc parsing utilities
enum AVPixelFormat av_get_pix_fmt(const char *name)
Return the pixel format corresponding to name.
Definition: pixdesc.c:2501
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
#define s1
Definition: regdef.h:38
static const uint8_t header[24]
Definition: sdr2.c:67
#define FF_ARRAY_ELEMS(a)
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
int64_t pos
Definition: avformat.h:804
int flags
Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS, AVFMT_NOTIMESTAMPS,...
Definition: avformat.h:659
int(* read_header)(struct AVFormatContext *)
Read the format header and initialize the AVFormatContext structure.
Definition: avformat.h:712
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:693
int(* read_probe)(const AVProbeData *)
Tell if a given file has a chance of being parsed as this format.
Definition: avformat.h:705
int(* read_packet)(struct AVFormatContext *, AVPacket *pkt)
Read one packet and put it in 'pkt'.
Definition: avformat.h:722
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
uint8_t * data
Definition: packet.h:369
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:389
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
const char * filename
Definition: avformat.h:442
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1090
enum AVStreamParseType need_parsing
Definition: avformat.h:1081
static av_always_inline int ff_subtitles_next_line(const char *ptr)
Get the number of characters to increment to jump to the next line, or to the end of the string.
Definition: subtitles.h:187
#define av_free(p)
#define av_freep(p)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
#define width
int size
const char * b
Definition: vf_curves.c:118
if(ret< 0)
Definition: vf_mcdeint.c:282
static double c[64]
#define XWD_VERSION
Definition: xwd.h:26
#define XWD_Z_PIXMAP
Definition: xwd.h:32
#define XWD_HEADER_SIZE
Definition: xwd.h:27