FFmpeg  4.3
concatdec.c
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1 /*
2  * Copyright (c) 2012 Nicolas George
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public License
8  * as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/avassert.h"
22 #include "libavutil/avstring.h"
23 #include "libavutil/bprint.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/timestamp.h"
28 #include "avformat.h"
29 #include "internal.h"
30 #include "url.h"
31 
32 typedef enum ConcatMatchMode {
36 
37 typedef struct ConcatStream {
40 } ConcatStream;
41 
42 typedef struct {
43  char *url;
44  int64_t start_time;
45  int64_t file_start_time;
46  int64_t file_inpoint;
47  int64_t duration;
48  int64_t user_duration;
49  int64_t next_dts;
51  int64_t inpoint;
52  int64_t outpoint;
55 } ConcatFile;
56 
57 typedef struct {
58  AVClass *class;
61  unsigned nb_files;
63  int safe;
64  int seekable;
65  int eof;
67  unsigned auto_convert;
70 
71 static int concat_probe(const AVProbeData *probe)
72 {
73  return memcmp(probe->buf, "ffconcat version 1.0", 20) ?
75 }
76 
77 static char *get_keyword(uint8_t **cursor)
78 {
79  char *ret = *cursor += strspn(*cursor, SPACE_CHARS);
80  *cursor += strcspn(*cursor, SPACE_CHARS);
81  if (**cursor) {
82  *((*cursor)++) = 0;
83  *cursor += strspn(*cursor, SPACE_CHARS);
84  }
85  return ret;
86 }
87 
88 static int safe_filename(const char *f)
89 {
90  const char *start = f;
91 
92  for (; *f; f++) {
93  /* A-Za-z0-9_- */
94  if (!((unsigned)((*f | 32) - 'a') < 26 ||
95  (unsigned)(*f - '0') < 10 || *f == '_' || *f == '-')) {
96  if (f == start)
97  return 0;
98  else if (*f == '/')
99  start = f + 1;
100  else if (*f != '.')
101  return 0;
102  }
103  }
104  return 1;
105 }
106 
107 #define FAIL(retcode) do { ret = (retcode); goto fail; } while(0)
108 
109 static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
110  unsigned *nb_files_alloc)
111 {
112  ConcatContext *cat = avf->priv_data;
113  ConcatFile *file;
114  char *url = NULL;
115  const char *proto;
116  size_t url_len, proto_len;
117  int ret;
118 
119  if (cat->safe > 0 && !safe_filename(filename)) {
120  av_log(avf, AV_LOG_ERROR, "Unsafe file name '%s'\n", filename);
121  FAIL(AVERROR(EPERM));
122  }
123 
124  proto = avio_find_protocol_name(filename);
125  proto_len = proto ? strlen(proto) : 0;
126  if (proto && !memcmp(filename, proto, proto_len) &&
127  (filename[proto_len] == ':' || filename[proto_len] == ',')) {
128  url = filename;
129  filename = NULL;
130  } else {
131  url_len = strlen(avf->url) + strlen(filename) + 16;
132  if (!(url = av_malloc(url_len)))
133  FAIL(AVERROR(ENOMEM));
134  ff_make_absolute_url(url, url_len, avf->url, filename);
135  av_freep(&filename);
136  }
137 
138  if (cat->nb_files >= *nb_files_alloc) {
139  size_t n = FFMAX(*nb_files_alloc * 2, 16);
140  ConcatFile *new_files;
141  if (n <= cat->nb_files || n > SIZE_MAX / sizeof(*cat->files) ||
142  !(new_files = av_realloc(cat->files, n * sizeof(*cat->files))))
143  FAIL(AVERROR(ENOMEM));
144  cat->files = new_files;
145  *nb_files_alloc = n;
146  }
147 
148  file = &cat->files[cat->nb_files++];
149  memset(file, 0, sizeof(*file));
150  *rfile = file;
151 
152  file->url = url;
153  file->start_time = AV_NOPTS_VALUE;
154  file->duration = AV_NOPTS_VALUE;
155  file->next_dts = AV_NOPTS_VALUE;
156  file->inpoint = AV_NOPTS_VALUE;
157  file->outpoint = AV_NOPTS_VALUE;
159 
160  return 0;
161 
162 fail:
163  av_free(url);
164  av_free(filename);
165  return ret;
166 }
167 
168 static int copy_stream_props(AVStream *st, AVStream *source_st)
169 {
170  int ret;
171 
172  if (st->codecpar->codec_id || !source_st->codecpar->codec_id) {
173  if (st->codecpar->extradata_size < source_st->codecpar->extradata_size) {
174  ret = ff_alloc_extradata(st->codecpar,
175  source_st->codecpar->extradata_size);
176  if (ret < 0)
177  return ret;
178  }
179  memcpy(st->codecpar->extradata, source_st->codecpar->extradata,
180  source_st->codecpar->extradata_size);
181  return 0;
182  }
183  if ((ret = avcodec_parameters_copy(st->codecpar, source_st->codecpar)) < 0)
184  return ret;
185  st->r_frame_rate = source_st->r_frame_rate;
186  st->avg_frame_rate = source_st->avg_frame_rate;
187  st->sample_aspect_ratio = source_st->sample_aspect_ratio;
188  avpriv_set_pts_info(st, 64, source_st->time_base.num, source_st->time_base.den);
189 
190  av_dict_copy(&st->metadata, source_st->metadata, 0);
191  return 0;
192 }
193 
194 static int detect_stream_specific(AVFormatContext *avf, int idx)
195 {
196  ConcatContext *cat = avf->priv_data;
197  AVStream *st = cat->avf->streams[idx];
198  ConcatStream *cs = &cat->cur_file->streams[idx];
199  const AVBitStreamFilter *filter;
200  AVBSFContext *bsf;
201  int ret;
202 
203  if (cat->auto_convert && st->codecpar->codec_id == AV_CODEC_ID_H264) {
204  if (!st->codecpar->extradata_size ||
205  (st->codecpar->extradata_size >= 3 && AV_RB24(st->codecpar->extradata) == 1) ||
206  (st->codecpar->extradata_size >= 4 && AV_RB32(st->codecpar->extradata) == 1))
207  return 0;
208  av_log(cat->avf, AV_LOG_INFO,
209  "Auto-inserting h264_mp4toannexb bitstream filter\n");
210  filter = av_bsf_get_by_name("h264_mp4toannexb");
211  if (!filter) {
212  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb bitstream filter "
213  "required for H.264 streams\n");
214  return AVERROR_BSF_NOT_FOUND;
215  }
216  ret = av_bsf_alloc(filter, &bsf);
217  if (ret < 0)
218  return ret;
219  cs->bsf = bsf;
220 
221  ret = avcodec_parameters_copy(bsf->par_in, st->codecpar);
222  if (ret < 0)
223  return ret;
224 
225  ret = av_bsf_init(bsf);
226  if (ret < 0)
227  return ret;
228 
229  ret = avcodec_parameters_copy(st->codecpar, bsf->par_out);
230  if (ret < 0)
231  return ret;
232  }
233  return 0;
234 }
235 
237 {
238  ConcatContext *cat = avf->priv_data;
239  AVStream *st;
240  int i, ret;
241 
242  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
243  if (i < avf->nb_streams) {
244  st = avf->streams[i];
245  } else {
246  if (!(st = avformat_new_stream(avf, NULL)))
247  return AVERROR(ENOMEM);
248  }
249  if ((ret = copy_stream_props(st, cat->avf->streams[i])) < 0)
250  return ret;
252  }
253  return 0;
254 }
255 
257 {
258  ConcatContext *cat = avf->priv_data;
259  AVStream *st;
260  int i, j, ret;
261 
262  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
263  st = cat->avf->streams[i];
264  for (j = 0; j < avf->nb_streams; j++) {
265  if (avf->streams[j]->id == st->id) {
266  av_log(avf, AV_LOG_VERBOSE,
267  "Match slave stream #%d with stream #%d id 0x%x\n",
268  i, j, st->id);
269  if ((ret = copy_stream_props(avf->streams[j], st)) < 0)
270  return ret;
271  cat->cur_file->streams[i].out_stream_index = j;
272  }
273  }
274  }
275  return 0;
276 }
277 
279 {
280  ConcatContext *cat = avf->priv_data;
281  ConcatStream *map;
282  int i, ret;
283 
284  if (cat->cur_file->nb_streams >= cat->avf->nb_streams)
285  return 0;
286  map = av_realloc(cat->cur_file->streams,
287  cat->avf->nb_streams * sizeof(*map));
288  if (!map)
289  return AVERROR(ENOMEM);
290  cat->cur_file->streams = map;
291  memset(map + cat->cur_file->nb_streams, 0,
292  (cat->avf->nb_streams - cat->cur_file->nb_streams) * sizeof(*map));
293 
294  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
295  map[i].out_stream_index = -1;
296  if ((ret = detect_stream_specific(avf, i)) < 0)
297  return ret;
298  }
299  switch (cat->stream_match_mode) {
300  case MATCH_ONE_TO_ONE:
301  ret = match_streams_one_to_one(avf);
302  break;
303  case MATCH_EXACT_ID:
304  ret = match_streams_exact_id(avf);
305  break;
306  default:
307  ret = AVERROR_BUG;
308  }
309  if (ret < 0)
310  return ret;
311  cat->cur_file->nb_streams = cat->avf->nb_streams;
312  return 0;
313 }
314 
316 {
317  if (file->user_duration != AV_NOPTS_VALUE)
318  return file->user_duration;
319  if (file->outpoint != AV_NOPTS_VALUE)
320  return file->outpoint - file->file_inpoint;
321  if (avf->duration > 0)
322  return avf->duration - (file->file_inpoint - file->file_start_time);
323  if (file->next_dts != AV_NOPTS_VALUE)
324  return file->next_dts - file->file_inpoint;
325  return AV_NOPTS_VALUE;
326 }
327 
328 static int open_file(AVFormatContext *avf, unsigned fileno)
329 {
330  ConcatContext *cat = avf->priv_data;
331  ConcatFile *file = &cat->files[fileno];
332  int ret;
333 
334  if (cat->avf)
335  avformat_close_input(&cat->avf);
336 
337  cat->avf = avformat_alloc_context();
338  if (!cat->avf)
339  return AVERROR(ENOMEM);
340 
341  cat->avf->flags |= avf->flags & ~AVFMT_FLAG_CUSTOM_IO;
343 
344  if ((ret = ff_copy_whiteblacklists(cat->avf, avf)) < 0)
345  return ret;
346 
347  if ((ret = avformat_open_input(&cat->avf, file->url, NULL, NULL)) < 0 ||
348  (ret = avformat_find_stream_info(cat->avf, NULL)) < 0) {
349  av_log(avf, AV_LOG_ERROR, "Impossible to open '%s'\n", file->url);
350  avformat_close_input(&cat->avf);
351  return ret;
352  }
353  cat->cur_file = file;
354  file->start_time = !fileno ? 0 :
355  cat->files[fileno - 1].start_time +
356  cat->files[fileno - 1].duration;
357  file->file_start_time = (cat->avf->start_time == AV_NOPTS_VALUE) ? 0 : cat->avf->start_time;
358  file->file_inpoint = (file->inpoint == AV_NOPTS_VALUE) ? file->file_start_time : file->inpoint;
359  file->duration = get_best_effort_duration(file, cat->avf);
360 
361  if (cat->segment_time_metadata) {
362  av_dict_set_int(&file->metadata, "lavf.concatdec.start_time", file->start_time, 0);
363  if (file->duration != AV_NOPTS_VALUE)
364  av_dict_set_int(&file->metadata, "lavf.concatdec.duration", file->duration, 0);
365  }
366 
367  if ((ret = match_streams(avf)) < 0)
368  return ret;
369  if (file->inpoint != AV_NOPTS_VALUE) {
370  if ((ret = avformat_seek_file(cat->avf, -1, INT64_MIN, file->inpoint, file->inpoint, 0)) < 0)
371  return ret;
372  }
373  return 0;
374 }
375 
377 {
378  ConcatContext *cat = avf->priv_data;
379  unsigned i, j;
380 
381  for (i = 0; i < cat->nb_files; i++) {
382  av_freep(&cat->files[i].url);
383  for (j = 0; j < cat->files[i].nb_streams; j++) {
384  if (cat->files[i].streams[j].bsf)
385  av_bsf_free(&cat->files[i].streams[j].bsf);
386  }
387  av_freep(&cat->files[i].streams);
388  av_dict_free(&cat->files[i].metadata);
389  }
390  if (cat->avf)
391  avformat_close_input(&cat->avf);
392  av_freep(&cat->files);
393  return 0;
394 }
395 
397 {
398  ConcatContext *cat = avf->priv_data;
399  AVBPrint bp;
400  uint8_t *cursor, *keyword;
401  int line = 0, i;
402  unsigned nb_files_alloc = 0;
403  ConcatFile *file = NULL;
404  int64_t ret, time = 0;
405 
407 
408  while ((ret = ff_read_line_to_bprint_overwrite(avf->pb, &bp)) >= 0) {
409  line++;
410  cursor = bp.str;
411  keyword = get_keyword(&cursor);
412  if (!*keyword || *keyword == '#')
413  continue;
414 
415  if (!strcmp(keyword, "file")) {
416  char *filename = av_get_token((const char **)&cursor, SPACE_CHARS);
417  if (!filename) {
418  av_log(avf, AV_LOG_ERROR, "Line %d: filename required\n", line);
420  }
421  if ((ret = add_file(avf, filename, &file, &nb_files_alloc)) < 0)
422  goto fail;
423  } else if (!strcmp(keyword, "duration") || !strcmp(keyword, "inpoint") || !strcmp(keyword, "outpoint")) {
424  char *dur_str = get_keyword(&cursor);
425  int64_t dur;
426  if (!file) {
427  av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n",
428  line, keyword);
430  }
431  if ((ret = av_parse_time(&dur, dur_str, 1)) < 0) {
432  av_log(avf, AV_LOG_ERROR, "Line %d: invalid %s '%s'\n",
433  line, keyword, dur_str);
434  goto fail;
435  }
436  if (!strcmp(keyword, "duration"))
437  file->user_duration = dur;
438  else if (!strcmp(keyword, "inpoint"))
439  file->inpoint = dur;
440  else if (!strcmp(keyword, "outpoint"))
441  file->outpoint = dur;
442  } else if (!strcmp(keyword, "file_packet_metadata")) {
443  char *metadata;
444  if (!file) {
445  av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n",
446  line, keyword);
448  }
449  metadata = av_get_token((const char **)&cursor, SPACE_CHARS);
450  if (!metadata) {
451  av_log(avf, AV_LOG_ERROR, "Line %d: packet metadata required\n", line);
453  }
454  if ((ret = av_dict_parse_string(&file->metadata, metadata, "=", "", 0)) < 0) {
455  av_log(avf, AV_LOG_ERROR, "Line %d: failed to parse metadata string\n", line);
456  av_freep(&metadata);
458  }
459  av_freep(&metadata);
460  } else if (!strcmp(keyword, "stream")) {
461  if (!avformat_new_stream(avf, NULL))
462  FAIL(AVERROR(ENOMEM));
463  } else if (!strcmp(keyword, "exact_stream_id")) {
464  if (!avf->nb_streams) {
465  av_log(avf, AV_LOG_ERROR, "Line %d: exact_stream_id without stream\n",
466  line);
468  }
469  avf->streams[avf->nb_streams - 1]->id =
470  strtol(get_keyword(&cursor), NULL, 0);
471  } else if (!strcmp(keyword, "ffconcat")) {
472  char *ver_kw = get_keyword(&cursor);
473  char *ver_val = get_keyword(&cursor);
474  if (strcmp(ver_kw, "version") || strcmp(ver_val, "1.0")) {
475  av_log(avf, AV_LOG_ERROR, "Line %d: invalid version\n", line);
477  }
478  if (cat->safe < 0)
479  cat->safe = 1;
480  } else {
481  av_log(avf, AV_LOG_ERROR, "Line %d: unknown keyword '%s'\n",
482  line, keyword);
484  }
485  }
486  if (ret != AVERROR_EOF && ret < 0)
487  goto fail;
488  if (!cat->nb_files)
490 
491  for (i = 0; i < cat->nb_files; i++) {
492  if (cat->files[i].start_time == AV_NOPTS_VALUE)
493  cat->files[i].start_time = time;
494  else
495  time = cat->files[i].start_time;
496  if (cat->files[i].user_duration == AV_NOPTS_VALUE) {
497  if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE)
498  break;
499  cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint;
500  }
501  cat->files[i].duration = cat->files[i].user_duration;
502  time += cat->files[i].user_duration;
503  }
504  if (i == cat->nb_files) {
505  avf->duration = time;
506  cat->seekable = 1;
507  }
508 
511  if ((ret = open_file(avf, 0)) < 0)
512  goto fail;
513  av_bprint_finalize(&bp, NULL);
514  return 0;
515 
516 fail:
517  av_bprint_finalize(&bp, NULL);
518  concat_read_close(avf);
519  return ret;
520 }
521 
523 {
524  ConcatContext *cat = avf->priv_data;
525  unsigned fileno = cat->cur_file - cat->files;
526 
528 
529  if (++fileno >= cat->nb_files) {
530  cat->eof = 1;
531  return AVERROR_EOF;
532  }
533  return open_file(avf, fileno);
534 }
535 
537 {
538  int ret;
539 
540  if (cs->bsf) {
541  ret = av_bsf_send_packet(cs->bsf, pkt);
542  if (ret < 0) {
543  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
544  "failed to send input packet\n");
545  return ret;
546  }
547 
548  while (!ret)
549  ret = av_bsf_receive_packet(cs->bsf, pkt);
550 
551  if (ret < 0 && (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)) {
552  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
553  "failed to receive output packet\n");
554  return ret;
555  }
556  }
557  return 0;
558 }
559 
560 /* Returns true if the packet dts is greater or equal to the specified outpoint. */
562 {
563  if (cat->cur_file->outpoint != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE) {
564  return av_compare_ts(pkt->dts, cat->avf->streams[pkt->stream_index]->time_base,
565  cat->cur_file->outpoint, AV_TIME_BASE_Q) >= 0;
566  }
567  return 0;
568 }
569 
571 {
572  ConcatContext *cat = avf->priv_data;
573  int ret;
574  int64_t delta;
575  ConcatStream *cs;
576  AVStream *st;
577 
578  if (cat->eof)
579  return AVERROR_EOF;
580 
581  if (!cat->avf)
582  return AVERROR(EIO);
583 
584  while (1) {
585  ret = av_read_frame(cat->avf, pkt);
586  if (ret == AVERROR_EOF) {
587  if ((ret = open_next_file(avf)) < 0)
588  return ret;
589  continue;
590  }
591  if (ret < 0)
592  return ret;
593  if ((ret = match_streams(avf)) < 0) {
594  return ret;
595  }
596  if (packet_after_outpoint(cat, pkt)) {
597  av_packet_unref(pkt);
598  if ((ret = open_next_file(avf)) < 0)
599  return ret;
600  continue;
601  }
602  cs = &cat->cur_file->streams[pkt->stream_index];
603  if (cs->out_stream_index < 0) {
604  av_packet_unref(pkt);
605  continue;
606  }
607  break;
608  }
609  if ((ret = filter_packet(avf, cs, pkt)) < 0)
610  return ret;
611 
612  st = cat->avf->streams[pkt->stream_index];
613  av_log(avf, AV_LOG_DEBUG, "file:%d stream:%d pts:%s pts_time:%s dts:%s dts_time:%s",
614  (unsigned)(cat->cur_file - cat->files), pkt->stream_index,
615  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
616  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
617 
618  delta = av_rescale_q(cat->cur_file->start_time - cat->cur_file->file_inpoint,
620  cat->avf->streams[pkt->stream_index]->time_base);
621  if (pkt->pts != AV_NOPTS_VALUE)
622  pkt->pts += delta;
623  if (pkt->dts != AV_NOPTS_VALUE)
624  pkt->dts += delta;
625  av_log(avf, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
626  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
627  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
628  if (cat->cur_file->metadata) {
629  int metadata_len;
630  char* packed_metadata = av_packet_pack_dictionary(cat->cur_file->metadata, &metadata_len);
631  if (!packed_metadata)
632  return AVERROR(ENOMEM);
634  packed_metadata, metadata_len);
635  if (ret < 0) {
636  av_freep(&packed_metadata);
637  return ret;
638  }
639  }
640 
641  if (cat->cur_file->duration == AV_NOPTS_VALUE && st->cur_dts != AV_NOPTS_VALUE) {
642  int64_t next_dts = av_rescale_q(st->cur_dts, st->time_base, AV_TIME_BASE_Q);
643  if (cat->cur_file->next_dts == AV_NOPTS_VALUE || next_dts > cat->cur_file->next_dts) {
644  cat->cur_file->next_dts = next_dts;
645  }
646  }
647 
648  pkt->stream_index = cs->out_stream_index;
649  return 0;
650 }
651 
652 static void rescale_interval(AVRational tb_in, AVRational tb_out,
653  int64_t *min_ts, int64_t *ts, int64_t *max_ts)
654 {
655  *ts = av_rescale_q (* ts, tb_in, tb_out);
656  *min_ts = av_rescale_q_rnd(*min_ts, tb_in, tb_out,
658  *max_ts = av_rescale_q_rnd(*max_ts, tb_in, tb_out,
660 }
661 
662 static int try_seek(AVFormatContext *avf, int stream,
663  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
664 {
665  ConcatContext *cat = avf->priv_data;
666  int64_t t0 = cat->cur_file->start_time - cat->cur_file->file_inpoint;
667 
668  ts -= t0;
669  min_ts = min_ts == INT64_MIN ? INT64_MIN : min_ts - t0;
670  max_ts = max_ts == INT64_MAX ? INT64_MAX : max_ts - t0;
671  if (stream >= 0) {
672  if (stream >= cat->avf->nb_streams)
673  return AVERROR(EIO);
675  &min_ts, &ts, &max_ts);
676  }
677  return avformat_seek_file(cat->avf, stream, min_ts, ts, max_ts, flags);
678 }
679 
680 static int real_seek(AVFormatContext *avf, int stream,
681  int64_t min_ts, int64_t ts, int64_t max_ts, int flags, AVFormatContext *cur_avf)
682 {
683  ConcatContext *cat = avf->priv_data;
684  int ret, left, right;
685 
686  if (stream >= 0) {
687  if (stream >= avf->nb_streams)
688  return AVERROR(EINVAL);
690  &min_ts, &ts, &max_ts);
691  }
692 
693  left = 0;
694  right = cat->nb_files;
695 
696  /* Always support seek to start */
697  if (ts <= 0)
698  right = 1;
699  else if (!cat->seekable)
700  return AVERROR(ESPIPE); /* XXX: can we use it? */
701 
702  while (right - left > 1) {
703  int mid = (left + right) / 2;
704  if (ts < cat->files[mid].start_time)
705  right = mid;
706  else
707  left = mid;
708  }
709 
710  if (cat->cur_file != &cat->files[left]) {
711  if ((ret = open_file(avf, left)) < 0)
712  return ret;
713  } else {
714  cat->avf = cur_avf;
715  }
716 
717  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
718  if (ret < 0 &&
719  left < cat->nb_files - 1 &&
720  cat->files[left + 1].start_time < max_ts) {
721  if (cat->cur_file == &cat->files[left])
722  cat->avf = NULL;
723  if ((ret = open_file(avf, left + 1)) < 0)
724  return ret;
725  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
726  }
727  return ret;
728 }
729 
730 static int concat_seek(AVFormatContext *avf, int stream,
731  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
732 {
733  ConcatContext *cat = avf->priv_data;
734  ConcatFile *cur_file_saved = cat->cur_file;
735  AVFormatContext *cur_avf_saved = cat->avf;
736  int ret;
737 
738  if (flags & (AVSEEK_FLAG_BYTE | AVSEEK_FLAG_FRAME))
739  return AVERROR(ENOSYS);
740  cat->avf = NULL;
741  if ((ret = real_seek(avf, stream, min_ts, ts, max_ts, flags, cur_avf_saved)) < 0) {
742  if (cat->cur_file != cur_file_saved) {
743  if (cat->avf)
744  avformat_close_input(&cat->avf);
745  }
746  cat->avf = cur_avf_saved;
747  cat->cur_file = cur_file_saved;
748  } else {
749  if (cat->cur_file != cur_file_saved) {
750  avformat_close_input(&cur_avf_saved);
751  }
752  cat->eof = 0;
753  }
754  return ret;
755 }
756 
757 #define OFFSET(x) offsetof(ConcatContext, x)
758 #define DEC AV_OPT_FLAG_DECODING_PARAM
759 
760 static const AVOption options[] = {
761  { "safe", "enable safe mode",
762  OFFSET(safe), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, DEC },
763  { "auto_convert", "automatically convert bitstream format",
764  OFFSET(auto_convert), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, DEC },
765  { "segment_time_metadata", "output file segment start time and duration as packet metadata",
766  OFFSET(segment_time_metadata), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
767  { NULL }
768 };
769 
770 static const AVClass concat_class = {
771  .class_name = "concat demuxer",
772  .item_name = av_default_item_name,
773  .option = options,
774  .version = LIBAVUTIL_VERSION_INT,
775 };
776 
777 
779  .name = "concat",
780  .long_name = NULL_IF_CONFIG_SMALL("Virtual concatenation script"),
781  .priv_data_size = sizeof(ConcatContext),
786  .read_seek2 = concat_seek,
787  .priv_class = &concat_class,
788 };
static int64_t get_best_effort_duration(ConcatFile *file, AVFormatContext *avf)
Definition: concatdec.c:315
#define NULL
Definition: coverity.c:32
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
void ff_make_absolute_url(char *buf, int size, const char *base, const char *rel)
Convert a relative url into an absolute url, given a base url.
Definition: url.c:122
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t next_dts
Definition: concatdec.c:49
AVCodecParameters * par_out
Parameters of the output stream.
Definition: bsf.h:83
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1629
AVOption.
Definition: opt.h:246
static int concat_read_close(AVFormatContext *avf)
Definition: concatdec.c:376
ConcatMatchMode
Definition: concatdec.c:32
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define DEC
Definition: concatdec.c:758
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:4938
int av_parse_time(int64_t *timeval, const char *timestr, int duration)
Parse timestr and return in *time a corresponding number of microseconds.
Definition: parseutils.c:587
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:159
#define FAIL(retcode)
Definition: concatdec.c:107
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:938
static void rescale_interval(AVRational tb_in, AVRational tb_out, int64_t *min_ts, int64_t *ts, int64_t *max_ts)
Definition: concatdec.c:652
int num
Numerator.
Definition: rational.h:59
The bitstream filter state.
Definition: bsf.h:49
AVDictionary * metadata
Definition: concatdec.c:53
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AV_RB24
Definition: intreadwrite.h:64
AVBSFContext * bsf
Definition: concatdec.c:38
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:533
static AVPacket pkt
static const AVOption options[]
Definition: concatdec.c:760
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
int64_t outpoint
Definition: concatdec.c:52
Format I/O context.
Definition: avformat.h:1351
int64_t cur_dts
Definition: avformat.h:1079
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
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhd.c:196
static int concat_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:730
ConcatStream * streams
Definition: concatdec.c:50
static int64_t start_time
Definition: ffplay.c:332
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
static int nb_streams
Definition: ffprobe.c:282
#define av_malloc(s)
float delta
static int match_streams(AVFormatContext *avf)
Definition: concatdec.c:278
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
#define f(width, name)
Definition: cbs_vp9.c:255
#define AV_RB32
Definition: intreadwrite.h:130
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
#define t0
Definition: regdef.h:28
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
AVInputFormat ff_concat_demuxer
Definition: concatdec.c:778
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
int64_t inpoint
Definition: concatdec.c:51
static int concat_read_header(AVFormatContext *avf)
Definition: concatdec.c:396
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
int out_stream_index
Definition: concatdec.c:39
int segment_time_metadata
Definition: concatdec.c:68
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
Allocate a context for a given bitstream filter.
Definition: bsf.c:91
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_BPRINT_SIZE_UNLIMITED
unsigned auto_convert
Definition: concatdec.c:67
#define AVERROR(e)
Definition: error.h:43
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp)
Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting its contents.
Definition: aviobuf.c:842
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
char * url
input or output URL.
Definition: avformat.h:1447
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
Definition: graph2dot.c:48
simple assert() macros that are a bit more flexible than ISO C assert().
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:123
static int concat_probe(const AVProbeData *probe)
Definition: concatdec.c:71
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
Definition: avstring.c:149
int64_t file_start_time
Definition: concatdec.c:45
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:144
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static int match_streams_one_to_one(AVFormatContext *avf)
Definition: concatdec.c:236
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:3321
static int try_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:662
static int packet_after_outpoint(ConcatContext *cat, AVPacket *pkt)
Definition: concatdec.c:561
static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
Definition: concatdec.c:536
static const AVClass concat_class
Definition: concatdec.c:770
static int open_file(AVFormatContext *avf, unsigned fileno)
Definition: concatdec.c:328
#define AVERROR_BSF_NOT_FOUND
Bitstream filter not found.
Definition: error.h:49
AVDictionary * metadata
Definition: avformat.h:940
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don&#39;t avio_close() it.
Definition: avformat.h:1490
ConcatMatchMode stream_match_mode
Definition: concatdec.c:66
#define cat(a, bpp, b)
Definition: vp9dsp_init.h:29
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int av_dict_parse_string(AVDictionary **pm, const char *str, const char *key_val_sep, const char *pairs_sep, int flags)
Parse the key/value pairs list and add the parsed entries to a dictionary.
Definition: dict.c:180
ConcatFile * cur_file
Definition: concatdec.c:60
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:197
A list of zero terminated key/value strings.
Definition: packet.h:172
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
ConcatFile * files
Definition: concatdec.c:59
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
Definition: avpacket.c:494
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:223
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int nb_streams
Definition: concatdec.c:54
Describe the class of an AVClass context structure.
Definition: log.h:67
#define SPACE_CHARS
Definition: internal.h:343
Rational number (pair of numerator and denominator).
Definition: rational.h:58
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:298
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2513
const VDPAUPixFmtMap * map
static int match_streams_exact_id(AVFormatContext *avf)
Definition: concatdec.c:256
unsigned nb_files
Definition: concatdec.c:61
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
misc parsing utilities
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1773
Round toward -infinity.
Definition: mathematics.h:82
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Seek to timestamp ts.
Definition: utils.c:2543
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:472
int64_t start_time
Definition: concatdec.c:44
#define flags(name, subs,...)
Definition: cbs_av1.c:564
static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: concatdec.c:570
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1456
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
char * url
Definition: concatdec.c:43
static int probe(const AVProbeData *p)
Definition: act.c:36
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
Main libavformat public API header.
static char * get_keyword(uint8_t **cursor)
Definition: concatdec.c:77
int64_t user_duration
Definition: concatdec.c:48
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3615
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
int den
Denominator.
Definition: rational.h:60
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4491
Flag telling rescaling functions to pass INT64_MIN/MAX through unchanged, avoiding special cases for ...
Definition: mathematics.h:108
static int open_next_file(AVFormatContext *avf)
Definition: concatdec.c:522
#define av_free(p)
static int copy_stream_props(AVStream *st, AVStream *source_st)
Definition: concatdec.c:168
int64_t duration
Definition: concatdec.c:47
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
void * priv_data
Format private data.
Definition: avformat.h:1379
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2515
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
static int real_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags, AVFormatContext *cur_avf)
Definition: concatdec.c:680
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:354
#define OFFSET(x)
Definition: concatdec.c:757
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile, unsigned *nb_files_alloc)
Definition: concatdec.c:109
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
unbuffered private I/O API
void av_bsf_free(AVBSFContext **pctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
Definition: bsf.c:40
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
Definition: mathematics.c:134
static int detect_stream_specific(AVFormatContext *avf, int idx)
Definition: concatdec.c:194
static int safe_filename(const char *f)
Definition: concatdec.c:88
int stream_index
Definition: packet.h:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2064
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1000
int64_t file_inpoint
Definition: concatdec.c:46
This structure stores compressed data.
Definition: packet.h:332
AVCodecParameters * par_in
Parameters of the input stream.
Definition: bsf.h:77
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AVFormatContext * avf
Definition: concatdec.c:62