FFmpeg  4.4.5
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;
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  const char *ptr;
117  size_t url_len;
118  int ret;
119 
120  if (cat->safe > 0 && !safe_filename(filename)) {
121  av_log(avf, AV_LOG_ERROR, "Unsafe file name '%s'\n", filename);
122  FAIL(AVERROR(EPERM));
123  }
124 
125  proto = avio_find_protocol_name(filename);
126  if (proto && av_strstart(filename, proto, &ptr) &&
127  (*ptr == ':' || *ptr == ',')) {
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;
251  cat->cur_file->streams[i].out_stream_index = i;
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 av_sat_sub64(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;
342  cat->avf->interrupt_callback = avf->interrupt_callback;
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  cat->files[i].outpoint - (uint64_t)cat->files[i].inpoint != av_sat_sub64(cat->files[i].outpoint, cat->files[i].inpoint)
499  )
500  break;
501  cat->files[i].user_duration = cat->files[i].outpoint - cat->files[i].inpoint;
502  }
503  cat->files[i].duration = cat->files[i].user_duration;
504  if (time + (uint64_t)cat->files[i].user_duration > INT64_MAX)
505  return AVERROR_INVALIDDATA;
506  time += cat->files[i].user_duration;
507  }
508  if (i == cat->nb_files) {
509  avf->duration = time;
510  cat->seekable = 1;
511  }
512 
513  cat->stream_match_mode = avf->nb_streams ? MATCH_EXACT_ID :
515  if ((ret = open_file(avf, 0)) < 0)
516  goto fail;
517  av_bprint_finalize(&bp, NULL);
518  return 0;
519 
520 fail:
521  av_bprint_finalize(&bp, NULL);
522  concat_read_close(avf);
523  return ret;
524 }
525 
527 {
528  ConcatContext *cat = avf->priv_data;
529  unsigned fileno = cat->cur_file - cat->files;
530 
531  cat->cur_file->duration = get_best_effort_duration(cat->cur_file, cat->avf);
532 
533  if (++fileno >= cat->nb_files) {
534  cat->eof = 1;
535  return AVERROR_EOF;
536  }
537  return open_file(avf, fileno);
538 }
539 
541 {
542  int ret;
543 
544  if (cs->bsf) {
545  ret = av_bsf_send_packet(cs->bsf, pkt);
546  if (ret < 0) {
547  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
548  "failed to send input packet\n");
549  return ret;
550  }
551 
552  while (!ret)
553  ret = av_bsf_receive_packet(cs->bsf, pkt);
554 
555  if (ret < 0 && (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)) {
556  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
557  "failed to receive output packet\n");
558  return ret;
559  }
560  }
561  return 0;
562 }
563 
564 /* Returns true if the packet dts is greater or equal to the specified outpoint. */
566 {
567  if (cat->cur_file->outpoint != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE) {
568  return av_compare_ts(pkt->dts, cat->avf->streams[pkt->stream_index]->time_base,
569  cat->cur_file->outpoint, AV_TIME_BASE_Q) >= 0;
570  }
571  return 0;
572 }
573 
575 {
576  ConcatContext *cat = avf->priv_data;
577  int ret;
578  int64_t delta;
579  ConcatStream *cs;
580  AVStream *st;
581 
582  if (cat->eof)
583  return AVERROR_EOF;
584 
585  if (!cat->avf)
586  return AVERROR(EIO);
587 
588  while (1) {
589  ret = av_read_frame(cat->avf, pkt);
590  if (ret == AVERROR_EOF) {
591  if ((ret = open_next_file(avf)) < 0)
592  return ret;
593  continue;
594  }
595  if (ret < 0)
596  return ret;
597  if ((ret = match_streams(avf)) < 0) {
598  return ret;
599  }
600  if (packet_after_outpoint(cat, pkt)) {
602  if ((ret = open_next_file(avf)) < 0)
603  return ret;
604  continue;
605  }
606  cs = &cat->cur_file->streams[pkt->stream_index];
607  if (cs->out_stream_index < 0) {
609  continue;
610  }
611  break;
612  }
613  if ((ret = filter_packet(avf, cs, pkt)) < 0)
614  return ret;
615 
616  st = cat->avf->streams[pkt->stream_index];
617  av_log(avf, AV_LOG_DEBUG, "file:%d stream:%d pts:%s pts_time:%s dts:%s dts_time:%s",
618  (unsigned)(cat->cur_file - cat->files), pkt->stream_index,
621 
622  delta = av_rescale_q(cat->cur_file->start_time - cat->cur_file->file_inpoint,
624  cat->avf->streams[pkt->stream_index]->time_base);
625  if (pkt->pts != AV_NOPTS_VALUE)
626  pkt->pts += delta;
627  if (pkt->dts != AV_NOPTS_VALUE)
628  pkt->dts += delta;
629  av_log(avf, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
632  if (cat->cur_file->metadata) {
633  buffer_size_t metadata_len;
634  char* packed_metadata = av_packet_pack_dictionary(cat->cur_file->metadata, &metadata_len);
635  if (!packed_metadata)
636  return AVERROR(ENOMEM);
638  packed_metadata, metadata_len);
639  if (ret < 0) {
640  av_freep(&packed_metadata);
641  return ret;
642  }
643  }
644 
645  if (cat->cur_file->duration == AV_NOPTS_VALUE && st->cur_dts != AV_NOPTS_VALUE) {
646  int64_t next_dts = av_rescale_q(st->cur_dts, st->time_base, AV_TIME_BASE_Q);
647  if (cat->cur_file->next_dts == AV_NOPTS_VALUE || next_dts > cat->cur_file->next_dts) {
648  cat->cur_file->next_dts = next_dts;
649  }
650  }
651 
653  return 0;
654 }
655 
656 static void rescale_interval(AVRational tb_in, AVRational tb_out,
657  int64_t *min_ts, int64_t *ts, int64_t *max_ts)
658 {
659  *ts = av_rescale_q (* ts, tb_in, tb_out);
660  *min_ts = av_rescale_q_rnd(*min_ts, tb_in, tb_out,
662  *max_ts = av_rescale_q_rnd(*max_ts, tb_in, tb_out,
664 }
665 
666 static int try_seek(AVFormatContext *avf, int stream,
667  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
668 {
669  ConcatContext *cat = avf->priv_data;
670  int64_t t0 = cat->cur_file->start_time - cat->cur_file->file_inpoint;
671 
672  ts -= t0;
673  min_ts = min_ts == INT64_MIN ? INT64_MIN : min_ts - t0;
674  max_ts = max_ts == INT64_MAX ? INT64_MAX : max_ts - t0;
675  if (stream >= 0) {
676  if (stream >= cat->avf->nb_streams)
677  return AVERROR(EIO);
678  rescale_interval(AV_TIME_BASE_Q, cat->avf->streams[stream]->time_base,
679  &min_ts, &ts, &max_ts);
680  }
681  return avformat_seek_file(cat->avf, stream, min_ts, ts, max_ts, flags);
682 }
683 
684 static int real_seek(AVFormatContext *avf, int stream,
685  int64_t min_ts, int64_t ts, int64_t max_ts, int flags, AVFormatContext *cur_avf)
686 {
687  ConcatContext *cat = avf->priv_data;
688  int ret, left, right;
689 
690  if (stream >= 0) {
691  if (stream >= avf->nb_streams)
692  return AVERROR(EINVAL);
694  &min_ts, &ts, &max_ts);
695  }
696 
697  left = 0;
698  right = cat->nb_files;
699 
700  /* Always support seek to start */
701  if (ts <= 0)
702  right = 1;
703  else if (!cat->seekable)
704  return AVERROR(ESPIPE); /* XXX: can we use it? */
705 
706  while (right - left > 1) {
707  int mid = (left + right) / 2;
708  if (ts < cat->files[mid].start_time)
709  right = mid;
710  else
711  left = mid;
712  }
713 
714  if (cat->cur_file != &cat->files[left]) {
715  if ((ret = open_file(avf, left)) < 0)
716  return ret;
717  } else {
718  cat->avf = cur_avf;
719  }
720 
721  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
722  if (ret < 0 &&
723  left < cat->nb_files - 1 &&
724  cat->files[left + 1].start_time < max_ts) {
725  if (cat->cur_file == &cat->files[left])
726  cat->avf = NULL;
727  if ((ret = open_file(avf, left + 1)) < 0)
728  return ret;
729  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
730  }
731  return ret;
732 }
733 
734 static int concat_seek(AVFormatContext *avf, int stream,
735  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
736 {
737  ConcatContext *cat = avf->priv_data;
738  ConcatFile *cur_file_saved = cat->cur_file;
739  AVFormatContext *cur_avf_saved = cat->avf;
740  int ret;
741 
743  return AVERROR(ENOSYS);
744  cat->avf = NULL;
745  if ((ret = real_seek(avf, stream, min_ts, ts, max_ts, flags, cur_avf_saved)) < 0) {
746  if (cat->cur_file != cur_file_saved) {
747  if (cat->avf)
748  avformat_close_input(&cat->avf);
749  }
750  cat->avf = cur_avf_saved;
751  cat->cur_file = cur_file_saved;
752  } else {
753  if (cat->cur_file != cur_file_saved) {
754  avformat_close_input(&cur_avf_saved);
755  }
756  cat->eof = 0;
757  }
758  return ret;
759 }
760 
761 #define OFFSET(x) offsetof(ConcatContext, x)
762 #define DEC AV_OPT_FLAG_DECODING_PARAM
763 
764 static const AVOption options[] = {
765  { "safe", "enable safe mode",
766  OFFSET(safe), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, DEC },
767  { "auto_convert", "automatically convert bitstream format",
768  OFFSET(auto_convert), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, DEC },
769  { "segment_time_metadata", "output file segment start time and duration as packet metadata",
770  OFFSET(segment_time_metadata), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
771  { NULL }
772 };
773 
774 static const AVClass concat_class = {
775  .class_name = "concat demuxer",
776  .item_name = av_default_item_name,
777  .option = options,
778  .version = LIBAVUTIL_VERSION_INT,
779 };
780 
781 
783  .name = "concat",
784  .long_name = NULL_IF_CONFIG_SMALL("Virtual concatenation script"),
785  .priv_data_size = sizeof(ConcatContext),
790  .read_seek2 = concat_seek,
791  .priv_class = &concat_class,
792 };
static int probe(const AVProbeData *p)
Definition: act.c:36
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2416
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2418
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1371
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:470
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
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:845
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Definition: avpacket.c:511
#define AV_RB24
Definition: intreadwrite.h:64
#define AV_RB32
Definition: intreadwrite.h:130
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
#define AV_BPRINT_SIZE_UNLIMITED
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define f(width, name)
Definition: cbs_vp9.c:255
static av_always_inline void filter(int16_t *output, ptrdiff_t out_stride, const int16_t *low, ptrdiff_t low_stride, const int16_t *high, ptrdiff_t high_stride, int len, int clip)
Definition: cfhddsp.c:27
#define fail()
Definition: checkasm.h:133
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
#define av_sat_sub64
Definition: common.h:167
#define FFMAX(a, b)
Definition: common.h:103
static int concat_read_header(AVFormatContext *avf)
Definition: concatdec.c:396
static int match_streams(AVFormatContext *avf)
Definition: concatdec.c:278
static int safe_filename(const char *f)
Definition: concatdec.c:88
static int concat_probe(const AVProbeData *probe)
Definition: concatdec.c:71
static const AVOption options[]
Definition: concatdec.c:764
static int copy_stream_props(AVStream *st, AVStream *source_st)
Definition: concatdec.c:168
static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: concatdec.c:574
static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile, unsigned *nb_files_alloc)
Definition: concatdec.c:109
static int packet_after_outpoint(ConcatContext *cat, AVPacket *pkt)
Definition: concatdec.c:565
static char * get_keyword(uint8_t **cursor)
Definition: concatdec.c:77
static const AVClass concat_class
Definition: concatdec.c:774
static int try_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:666
AVInputFormat ff_concat_demuxer
Definition: concatdec.c:782
static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
Definition: concatdec.c:540
static int open_next_file(AVFormatContext *avf)
Definition: concatdec.c:526
#define FAIL(retcode)
Definition: concatdec.c:107
static int concat_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:734
static void rescale_interval(AVRational tb_in, AVRational tb_out, int64_t *min_ts, int64_t *ts, int64_t *max_ts)
Definition: concatdec.c:656
static int match_streams_exact_id(AVFormatContext *avf)
Definition: concatdec.c:256
static int concat_read_close(AVFormatContext *avf)
Definition: concatdec.c:376
#define OFFSET(x)
Definition: concatdec.c:761
static int open_file(AVFormatContext *avf, unsigned fileno)
Definition: concatdec.c:328
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:684
static int detect_stream_specific(AVFormatContext *avf, int idx)
Definition: concatdec.c:194
static int64_t get_best_effort_duration(ConcatFile *file, AVFormatContext *avf)
Definition: concatdec.c:315
static int match_streams_one_to_one(AVFormatContext *avf)
Definition: concatdec.c:236
ConcatMatchMode
Definition: concatdec.c:32
@ MATCH_EXACT_ID
Definition: concatdec.c:34
@ MATCH_ONE_TO_ONE
Definition: concatdec.c:33
#define DEC
Definition: concatdec.c:762
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static int64_t start_time
Definition: ffplay.c:332
static int nb_streams
Definition: ffprobe.c:283
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
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
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:148
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
Allocate a context for a given bitstream filter.
Definition: bsf.c:95
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:227
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:201
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
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
@ AV_PKT_DATA_STRINGS_METADATA
A list of zero terminated key/value strings.
Definition: packet.h:172
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:211
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
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:2512
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1741
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3602
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4481
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:512
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_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
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
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
#define AVERROR_BSF_NOT_FOUND
Bitstream filter not found.
Definition: error.h:49
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#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
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
@ AV_ROUND_DOWN
Round toward -infinity.
Definition: mathematics.h:82
@ AV_ROUND_PASS_MINMAX
Flag telling rescaling functions to pass INT64_MIN/MAX through unchanged, avoiding special cases for ...
Definition: mathematics.h:108
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:83
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
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
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
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:151
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
const VDPAUPixFmtMap * map
int i
Definition: input.c:407
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:160
#define SPACE_CHARS
Definition: internal.h:499
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:4945
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:3314
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
AVOptions.
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
misc parsing utilities
#define t0
Definition: regdef.h:28
The bitstream filter state.
Definition: bsf.h:49
AVCodecParameters * par_in
Parameters of the input stream.
Definition: bsf.h:77
AVCodecParameters * par_out
Parameters of the output stream.
Definition: bsf.h:83
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
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
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
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1288
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1363
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1512
char * url
input or output URL.
Definition: avformat.h:1328
void * priv_data
Format private data.
Definition: avformat.h:1260
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1347
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:935
AVDictionary * metadata
Definition: avformat.h:937
int id
Format-specific stream ID.
Definition: avformat.h:880
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
int64_t cur_dts
Definition: avformat.h:1066
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1015
ConcatFile * cur_file
Definition: concatdec.c:60
ConcatMatchMode stream_match_mode
Definition: concatdec.c:66
ConcatFile * files
Definition: concatdec.c:59
unsigned nb_files
Definition: concatdec.c:61
int segment_time_metadata
Definition: concatdec.c:68
AVFormatContext * avf
Definition: concatdec.c:62
unsigned auto_convert
Definition: concatdec.c:67
int64_t file_start_time
Definition: concatdec.c:45
int64_t outpoint
Definition: concatdec.c:52
char * url
Definition: concatdec.c:43
int64_t next_dts
Definition: concatdec.c:49
int64_t user_duration
Definition: concatdec.c:48
int64_t inpoint
Definition: concatdec.c:51
ConcatStream * streams
Definition: concatdec.c:50
AVDictionary * metadata
Definition: concatdec.c:53
int64_t duration
Definition: concatdec.c:47
int64_t start_time
Definition: concatdec.c:44
int64_t file_inpoint
Definition: concatdec.c:46
int nb_streams
Definition: concatdec.c:54
AVBSFContext * bsf
Definition: concatdec.c:38
int out_stream_index
Definition: concatdec.c:39
Definition: graph2dot.c:48
#define av_free(p)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
timestamp utils, mostly useful for debugging/logging purposes
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
#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
int 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:319
unbuffered private I/O API
float delta
#define cat(a, bpp, b)
Definition: vp9dsp_init.h:31