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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/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/timestamp.h"
27 #include "avformat.h"
28 #include "internal.h"
29 #include "url.h"
30 
31 typedef enum ConcatMatchMode {
35 
36 typedef struct ConcatStream {
39 } ConcatStream;
40 
41 typedef struct {
42  char *url;
43  int64_t start_time;
44  int64_t file_start_time;
45  int64_t file_inpoint;
46  int64_t duration;
47  int64_t next_dts;
49  int64_t inpoint;
50  int64_t outpoint;
53 } ConcatFile;
54 
55 typedef struct {
56  AVClass *class;
59  unsigned nb_files;
61  int safe;
62  int seekable;
63  int eof;
65  unsigned auto_convert;
68 
70 {
71  return memcmp(probe->buf, "ffconcat version 1.0", 20) ?
73 }
74 
75 static char *get_keyword(uint8_t **cursor)
76 {
77  char *ret = *cursor += strspn(*cursor, SPACE_CHARS);
78  *cursor += strcspn(*cursor, SPACE_CHARS);
79  if (**cursor) {
80  *((*cursor)++) = 0;
81  *cursor += strspn(*cursor, SPACE_CHARS);
82  }
83  return ret;
84 }
85 
86 static int safe_filename(const char *f)
87 {
88  const char *start = f;
89 
90  for (; *f; f++) {
91  /* A-Za-z0-9_- */
92  if (!((unsigned)((*f | 32) - 'a') < 26 ||
93  (unsigned)(*f - '0') < 10 || *f == '_' || *f == '-')) {
94  if (f == start)
95  return 0;
96  else if (*f == '/')
97  start = f + 1;
98  else if (*f != '.')
99  return 0;
100  }
101  }
102  return 1;
103 }
104 
105 #define FAIL(retcode) do { ret = (retcode); goto fail; } while(0)
106 
107 static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
108  unsigned *nb_files_alloc)
109 {
110  ConcatContext *cat = avf->priv_data;
111  ConcatFile *file;
112  char *url = NULL;
113  const char *proto;
114  size_t url_len, proto_len;
115  int ret;
116 
117  if (cat->safe > 0 && !safe_filename(filename)) {
118  av_log(avf, AV_LOG_ERROR, "Unsafe file name '%s'\n", filename);
119  FAIL(AVERROR(EPERM));
120  }
121 
122  proto = avio_find_protocol_name(filename);
123  proto_len = proto ? strlen(proto) : 0;
124  if (proto && !memcmp(filename, proto, proto_len) &&
125  (filename[proto_len] == ':' || filename[proto_len] == ',')) {
126  url = filename;
127  filename = NULL;
128  } else {
129  url_len = strlen(avf->filename) + strlen(filename) + 16;
130  if (!(url = av_malloc(url_len)))
131  FAIL(AVERROR(ENOMEM));
132  ff_make_absolute_url(url, url_len, avf->filename, filename);
133  av_freep(&filename);
134  }
135 
136  if (cat->nb_files >= *nb_files_alloc) {
137  size_t n = FFMAX(*nb_files_alloc * 2, 16);
138  ConcatFile *new_files;
139  if (n <= cat->nb_files || n > SIZE_MAX / sizeof(*cat->files) ||
140  !(new_files = av_realloc(cat->files, n * sizeof(*cat->files))))
141  FAIL(AVERROR(ENOMEM));
142  cat->files = new_files;
143  *nb_files_alloc = n;
144  }
145 
146  file = &cat->files[cat->nb_files++];
147  memset(file, 0, sizeof(*file));
148  *rfile = file;
149 
150  file->url = url;
151  file->start_time = AV_NOPTS_VALUE;
152  file->duration = AV_NOPTS_VALUE;
153  file->next_dts = AV_NOPTS_VALUE;
154  file->inpoint = AV_NOPTS_VALUE;
155  file->outpoint = AV_NOPTS_VALUE;
156 
157  return 0;
158 
159 fail:
160  av_free(url);
161  av_free(filename);
162  return ret;
163 }
164 
165 static int copy_stream_props(AVStream *st, AVStream *source_st)
166 {
167  int ret;
168 
169  if (st->codecpar->codec_id || !source_st->codecpar->codec_id) {
170  if (st->codecpar->extradata_size < source_st->codecpar->extradata_size) {
171  if (st->codecpar->extradata) {
172  av_freep(&st->codecpar->extradata);
173  st->codecpar->extradata_size = 0;
174  }
175  ret = ff_alloc_extradata(st->codecpar,
176  source_st->codecpar->extradata_size);
177  if (ret < 0)
178  return ret;
179  }
180  memcpy(st->codecpar->extradata, source_st->codecpar->extradata,
181  source_st->codecpar->extradata_size);
182  return 0;
183  }
184  if ((ret = avcodec_parameters_copy(st->codecpar, source_st->codecpar)) < 0)
185  return ret;
186  st->r_frame_rate = source_st->r_frame_rate;
187  st->avg_frame_rate = source_st->avg_frame_rate;
188  st->time_base = source_st->time_base;
189  st->sample_aspect_ratio = source_st->sample_aspect_ratio;
190 
191  av_dict_copy(&st->metadata, source_st->metadata, 0);
192  return 0;
193 }
194 
195 static int detect_stream_specific(AVFormatContext *avf, int idx)
196 {
197  ConcatContext *cat = avf->priv_data;
198  AVStream *st = cat->avf->streams[idx];
199  ConcatStream *cs = &cat->cur_file->streams[idx];
200  const AVBitStreamFilter *filter;
201  AVBSFContext *bsf;
202  int ret;
203 
204  if (cat->auto_convert && st->codecpar->codec_id == AV_CODEC_ID_H264) {
205  if (!st->codecpar->extradata_size ||
206  (st->codecpar->extradata_size >= 3 && AV_RB24(st->codecpar->extradata) == 1) ||
207  (st->codecpar->extradata_size >= 4 && AV_RB32(st->codecpar->extradata) == 1))
208  return 0;
209  av_log(cat->avf, AV_LOG_INFO,
210  "Auto-inserting h264_mp4toannexb bitstream filter\n");
211  filter = av_bsf_get_by_name("h264_mp4toannexb");
212  if (!filter) {
213  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb bitstream filter "
214  "required for H.264 streams\n");
215  return AVERROR_BSF_NOT_FOUND;
216  }
217  ret = av_bsf_alloc(filter, &bsf);
218  if (ret < 0)
219  return ret;
220  cs->bsf = bsf;
221 
222  ret = avcodec_parameters_copy(bsf->par_in, st->codecpar);
223  if (ret < 0)
224  return ret;
225 
226  ret = av_bsf_init(bsf);
227  if (ret < 0)
228  return ret;
229 
230  ret = avcodec_parameters_copy(st->codecpar, bsf->par_out);
231  if (ret < 0)
232  return ret;
233  }
234  return 0;
235 }
236 
238 {
239  ConcatContext *cat = avf->priv_data;
240  AVStream *st;
241  int i, ret;
242 
243  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
244  if (i < avf->nb_streams) {
245  st = avf->streams[i];
246  } else {
247  if (!(st = avformat_new_stream(avf, NULL)))
248  return AVERROR(ENOMEM);
249  }
250  if ((ret = copy_stream_props(st, cat->avf->streams[i])) < 0)
251  return ret;
252  cat->cur_file->streams[i].out_stream_index = i;
253  }
254  return 0;
255 }
256 
258 {
259  ConcatContext *cat = avf->priv_data;
260  AVStream *st;
261  int i, j, ret;
262 
263  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
264  st = cat->avf->streams[i];
265  for (j = 0; j < avf->nb_streams; j++) {
266  if (avf->streams[j]->id == st->id) {
267  av_log(avf, AV_LOG_VERBOSE,
268  "Match slave stream #%d with stream #%d id 0x%x\n",
269  i, j, st->id);
270  if ((ret = copy_stream_props(avf->streams[j], st)) < 0)
271  return ret;
272  cat->cur_file->streams[i].out_stream_index = j;
273  }
274  }
275  }
276  return 0;
277 }
278 
280 {
281  ConcatContext *cat = avf->priv_data;
282  ConcatStream *map;
283  int i, ret;
284 
285  if (cat->cur_file->nb_streams >= cat->avf->nb_streams)
286  return 0;
287  map = av_realloc(cat->cur_file->streams,
288  cat->avf->nb_streams * sizeof(*map));
289  if (!map)
290  return AVERROR(ENOMEM);
291  cat->cur_file->streams = map;
292  memset(map + cat->cur_file->nb_streams, 0,
293  (cat->avf->nb_streams - cat->cur_file->nb_streams) * sizeof(*map));
294 
295  for (i = cat->cur_file->nb_streams; i < cat->avf->nb_streams; i++) {
296  map[i].out_stream_index = -1;
297  if ((ret = detect_stream_specific(avf, i)) < 0)
298  return ret;
299  }
300  switch (cat->stream_match_mode) {
301  case MATCH_ONE_TO_ONE:
302  ret = match_streams_one_to_one(avf);
303  break;
304  case MATCH_EXACT_ID:
305  ret = match_streams_exact_id(avf);
306  break;
307  default:
308  ret = AVERROR_BUG;
309  }
310  if (ret < 0)
311  return ret;
312  cat->cur_file->nb_streams = cat->avf->nb_streams;
313  return 0;
314 }
315 
316 static int open_file(AVFormatContext *avf, unsigned fileno)
317 {
318  ConcatContext *cat = avf->priv_data;
319  ConcatFile *file = &cat->files[fileno];
320  int ret;
321 
322  if (cat->avf)
323  avformat_close_input(&cat->avf);
324 
325  cat->avf = avformat_alloc_context();
326  if (!cat->avf)
327  return AVERROR(ENOMEM);
328 
329  cat->avf->flags |= avf->flags & ~AVFMT_FLAG_CUSTOM_IO;
331 
332  if ((ret = ff_copy_whiteblacklists(cat->avf, avf)) < 0)
333  return ret;
334 
335  if ((ret = avformat_open_input(&cat->avf, file->url, NULL, NULL)) < 0 ||
336  (ret = avformat_find_stream_info(cat->avf, NULL)) < 0) {
337  av_log(avf, AV_LOG_ERROR, "Impossible to open '%s'\n", file->url);
338  avformat_close_input(&cat->avf);
339  return ret;
340  }
341  cat->cur_file = file;
342  if (file->start_time == AV_NOPTS_VALUE)
343  file->start_time = !fileno ? 0 :
344  cat->files[fileno - 1].start_time +
345  cat->files[fileno - 1].duration;
346  file->file_start_time = (cat->avf->start_time == AV_NOPTS_VALUE) ? 0 : cat->avf->start_time;
347  file->file_inpoint = (file->inpoint == AV_NOPTS_VALUE) ? file->file_start_time : file->inpoint;
348  if (file->duration == AV_NOPTS_VALUE && file->outpoint != AV_NOPTS_VALUE)
349  file->duration = file->outpoint - file->file_inpoint;
350 
351  if (cat->segment_time_metadata) {
352  av_dict_set_int(&file->metadata, "lavf.concatdec.start_time", file->start_time, 0);
353  if (file->duration != AV_NOPTS_VALUE)
354  av_dict_set_int(&file->metadata, "lavf.concatdec.duration", file->duration, 0);
355  }
356 
357  if ((ret = match_streams(avf)) < 0)
358  return ret;
359  if (file->inpoint != AV_NOPTS_VALUE) {
360  if ((ret = avformat_seek_file(cat->avf, -1, INT64_MIN, file->inpoint, file->inpoint, 0)) < 0)
361  return ret;
362  }
363  return 0;
364 }
365 
367 {
368  ConcatContext *cat = avf->priv_data;
369  unsigned i, j;
370 
371  for (i = 0; i < cat->nb_files; i++) {
372  av_freep(&cat->files[i].url);
373  for (j = 0; j < cat->files[i].nb_streams; j++) {
374  if (cat->files[i].streams[j].bsf)
375  av_bsf_free(&cat->files[i].streams[j].bsf);
376  }
377  av_freep(&cat->files[i].streams);
378  av_dict_free(&cat->files[i].metadata);
379  }
380  if (cat->avf)
381  avformat_close_input(&cat->avf);
382  av_freep(&cat->files);
383  return 0;
384 }
385 
387 {
388  ConcatContext *cat = avf->priv_data;
389  uint8_t buf[4096];
390  uint8_t *cursor, *keyword;
391  int ret, line = 0, i;
392  unsigned nb_files_alloc = 0;
393  ConcatFile *file = NULL;
394  int64_t time = 0;
395 
396  while (1) {
397  if ((ret = ff_get_line(avf->pb, buf, sizeof(buf))) <= 0)
398  break;
399  line++;
400  cursor = buf;
401  keyword = get_keyword(&cursor);
402  if (!*keyword || *keyword == '#')
403  continue;
404 
405  if (!strcmp(keyword, "file")) {
406  char *filename = av_get_token((const char **)&cursor, SPACE_CHARS);
407  if (!filename) {
408  av_log(avf, AV_LOG_ERROR, "Line %d: filename required\n", line);
410  }
411  if ((ret = add_file(avf, filename, &file, &nb_files_alloc)) < 0)
412  goto fail;
413  } else if (!strcmp(keyword, "duration") || !strcmp(keyword, "inpoint") || !strcmp(keyword, "outpoint")) {
414  char *dur_str = get_keyword(&cursor);
415  int64_t dur;
416  if (!file) {
417  av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n",
418  line, keyword);
420  }
421  if ((ret = av_parse_time(&dur, dur_str, 1)) < 0) {
422  av_log(avf, AV_LOG_ERROR, "Line %d: invalid %s '%s'\n",
423  line, keyword, dur_str);
424  goto fail;
425  }
426  if (!strcmp(keyword, "duration"))
427  file->duration = dur;
428  else if (!strcmp(keyword, "inpoint"))
429  file->inpoint = dur;
430  else if (!strcmp(keyword, "outpoint"))
431  file->outpoint = dur;
432  } else if (!strcmp(keyword, "file_packet_metadata")) {
433  char *metadata;
434  if (!file) {
435  av_log(avf, AV_LOG_ERROR, "Line %d: %s without file\n",
436  line, keyword);
438  }
439  metadata = av_get_token((const char **)&cursor, SPACE_CHARS);
440  if (!metadata) {
441  av_log(avf, AV_LOG_ERROR, "Line %d: packet metadata required\n", line);
443  }
444  if ((ret = av_dict_parse_string(&file->metadata, metadata, "=", "", 0)) < 0) {
445  av_log(avf, AV_LOG_ERROR, "Line %d: failed to parse metadata string\n", line);
446  av_freep(&metadata);
448  }
449  av_freep(&metadata);
450  } else if (!strcmp(keyword, "stream")) {
451  if (!avformat_new_stream(avf, NULL))
452  FAIL(AVERROR(ENOMEM));
453  } else if (!strcmp(keyword, "exact_stream_id")) {
454  if (!avf->nb_streams) {
455  av_log(avf, AV_LOG_ERROR, "Line %d: exact_stream_id without stream\n",
456  line);
458  }
459  avf->streams[avf->nb_streams - 1]->id =
460  strtol(get_keyword(&cursor), NULL, 0);
461  } else if (!strcmp(keyword, "ffconcat")) {
462  char *ver_kw = get_keyword(&cursor);
463  char *ver_val = get_keyword(&cursor);
464  if (strcmp(ver_kw, "version") || strcmp(ver_val, "1.0")) {
465  av_log(avf, AV_LOG_ERROR, "Line %d: invalid version\n", line);
467  }
468  if (cat->safe < 0)
469  cat->safe = 1;
470  } else {
471  av_log(avf, AV_LOG_ERROR, "Line %d: unknown keyword '%s'\n",
472  line, keyword);
474  }
475  }
476  if (ret < 0)
477  goto fail;
478  if (!cat->nb_files)
480 
481  for (i = 0; i < cat->nb_files; i++) {
482  if (cat->files[i].start_time == AV_NOPTS_VALUE)
483  cat->files[i].start_time = time;
484  else
485  time = cat->files[i].start_time;
486  if (cat->files[i].duration == AV_NOPTS_VALUE) {
487  if (cat->files[i].inpoint == AV_NOPTS_VALUE || cat->files[i].outpoint == AV_NOPTS_VALUE)
488  break;
489  cat->files[i].duration = cat->files[i].outpoint - cat->files[i].inpoint;
490  }
491  time += cat->files[i].duration;
492  }
493  if (i == cat->nb_files) {
494  avf->duration = time;
495  cat->seekable = 1;
496  }
497 
500  if ((ret = open_file(avf, 0)) < 0)
501  goto fail;
502  return 0;
503 
504 fail:
505  concat_read_close(avf);
506  return ret;
507 }
508 
510 {
511  ConcatContext *cat = avf->priv_data;
512  unsigned fileno = cat->cur_file - cat->files;
513 
514  if (cat->cur_file->duration == AV_NOPTS_VALUE) {
515  if (cat->avf->duration > 0 || cat->cur_file->next_dts == AV_NOPTS_VALUE) {
516  cat->cur_file->duration = cat->avf->duration;
517  } else {
518  cat->cur_file->duration = cat->cur_file->next_dts;
519  }
521  }
522 
523  if (++fileno >= cat->nb_files) {
524  cat->eof = 1;
525  return AVERROR_EOF;
526  }
527  return open_file(avf, fileno);
528 }
529 
531 {
532  int ret;
533 
534  if (cs->bsf) {
535  ret = av_bsf_send_packet(cs->bsf, pkt);
536  if (ret < 0) {
537  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
538  "failed to send input packet\n");
539  av_packet_unref(pkt);
540  return ret;
541  }
542 
543  while (!ret)
544  ret = av_bsf_receive_packet(cs->bsf, pkt);
545 
546  if (ret < 0 && (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)) {
547  av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
548  "failed to receive output packet\n");
549  return ret;
550  }
551  }
552  return 0;
553 }
554 
555 /* Returns true if the packet dts is greater or equal to the specified outpoint. */
557 {
558  if (cat->cur_file->outpoint != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE) {
559  return av_compare_ts(pkt->dts, cat->avf->streams[pkt->stream_index]->time_base,
560  cat->cur_file->outpoint, AV_TIME_BASE_Q) >= 0;
561  }
562  return 0;
563 }
564 
566 {
567  ConcatContext *cat = avf->priv_data;
568  int ret;
569  int64_t delta;
570  ConcatStream *cs;
571  AVStream *st;
572 
573  if (cat->eof)
574  return AVERROR_EOF;
575 
576  if (!cat->avf)
577  return AVERROR(EIO);
578 
579  while (1) {
580  ret = av_read_frame(cat->avf, pkt);
581  if (ret == AVERROR_EOF) {
582  if ((ret = open_next_file(avf)) < 0)
583  return ret;
584  continue;
585  }
586  if (ret < 0)
587  return ret;
588  if ((ret = match_streams(avf)) < 0) {
589  av_packet_unref(pkt);
590  return ret;
591  }
592  if (packet_after_outpoint(cat, pkt)) {
593  av_packet_unref(pkt);
594  if ((ret = open_next_file(avf)) < 0)
595  return ret;
596  continue;
597  }
598  cs = &cat->cur_file->streams[pkt->stream_index];
599  if (cs->out_stream_index < 0) {
600  av_packet_unref(pkt);
601  continue;
602  }
603  pkt->stream_index = cs->out_stream_index;
604  break;
605  }
606  if ((ret = filter_packet(avf, cs, pkt)))
607  return ret;
608 
609  st = cat->avf->streams[pkt->stream_index];
610  av_log(avf, AV_LOG_DEBUG, "file:%d stream:%d pts:%s pts_time:%s dts:%s dts_time:%s",
611  (unsigned)(cat->cur_file - cat->files), pkt->stream_index,
612  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
613  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
614 
615  delta = av_rescale_q(cat->cur_file->start_time - cat->cur_file->file_inpoint,
617  cat->avf->streams[pkt->stream_index]->time_base);
618  if (pkt->pts != AV_NOPTS_VALUE)
619  pkt->pts += delta;
620  if (pkt->dts != AV_NOPTS_VALUE)
621  pkt->dts += delta;
622  av_log(avf, AV_LOG_DEBUG, " -> pts:%s pts_time:%s dts:%s dts_time:%s\n",
623  av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
624  av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
625  if (cat->cur_file->metadata) {
626  uint8_t* metadata;
627  int metadata_len;
628  char* packed_metadata = av_packet_pack_dictionary(cat->cur_file->metadata, &metadata_len);
629  if (!packed_metadata)
630  return AVERROR(ENOMEM);
631  if (!(metadata = av_packet_new_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, metadata_len))) {
632  av_freep(&packed_metadata);
633  return AVERROR(ENOMEM);
634  }
635  memcpy(metadata, packed_metadata, metadata_len);
636  av_freep(&packed_metadata);
637  }
638 
639  if (cat->cur_file->duration == AV_NOPTS_VALUE && st->cur_dts != AV_NOPTS_VALUE) {
640  int64_t next_dts = av_rescale_q(st->cur_dts, st->time_base, AV_TIME_BASE_Q);
641  if (cat->cur_file->next_dts == AV_NOPTS_VALUE || next_dts > cat->cur_file->next_dts) {
642  cat->cur_file->next_dts = next_dts;
643  }
644  }
645 
646  return ret;
647 }
648 
649 static void rescale_interval(AVRational tb_in, AVRational tb_out,
650  int64_t *min_ts, int64_t *ts, int64_t *max_ts)
651 {
652  *ts = av_rescale_q (* ts, tb_in, tb_out);
653  *min_ts = av_rescale_q_rnd(*min_ts, tb_in, tb_out,
655  *max_ts = av_rescale_q_rnd(*max_ts, tb_in, tb_out,
657 }
658 
659 static int try_seek(AVFormatContext *avf, int stream,
660  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
661 {
662  ConcatContext *cat = avf->priv_data;
663  int64_t t0 = cat->cur_file->start_time - cat->cur_file->file_inpoint;
664 
665  ts -= t0;
666  min_ts = min_ts == INT64_MIN ? INT64_MIN : min_ts - t0;
667  max_ts = max_ts == INT64_MAX ? INT64_MAX : max_ts - t0;
668  if (stream >= 0) {
669  if (stream >= cat->avf->nb_streams)
670  return AVERROR(EIO);
672  &min_ts, &ts, &max_ts);
673  }
674  return avformat_seek_file(cat->avf, stream, min_ts, ts, max_ts, flags);
675 }
676 
677 static int real_seek(AVFormatContext *avf, int stream,
678  int64_t min_ts, int64_t ts, int64_t max_ts, int flags, AVFormatContext *cur_avf)
679 {
680  ConcatContext *cat = avf->priv_data;
681  int ret, left, right;
682 
683  if (stream >= 0) {
684  if (stream >= avf->nb_streams)
685  return AVERROR(EINVAL);
687  &min_ts, &ts, &max_ts);
688  }
689 
690  left = 0;
691  right = cat->nb_files;
692  while (right - left > 1) {
693  int mid = (left + right) / 2;
694  if (ts < cat->files[mid].start_time)
695  right = mid;
696  else
697  left = mid;
698  }
699 
700  if (cat->cur_file != &cat->files[left]) {
701  if ((ret = open_file(avf, left)) < 0)
702  return ret;
703  } else {
704  cat->avf = cur_avf;
705  }
706 
707  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
708  if (ret < 0 &&
709  left < cat->nb_files - 1 &&
710  cat->files[left + 1].start_time < max_ts) {
711  if (cat->cur_file == &cat->files[left])
712  cat->avf = NULL;
713  if ((ret = open_file(avf, left + 1)) < 0)
714  return ret;
715  ret = try_seek(avf, stream, min_ts, ts, max_ts, flags);
716  }
717  return ret;
718 }
719 
720 static int concat_seek(AVFormatContext *avf, int stream,
721  int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
722 {
723  ConcatContext *cat = avf->priv_data;
724  ConcatFile *cur_file_saved = cat->cur_file;
725  AVFormatContext *cur_avf_saved = cat->avf;
726  int ret;
727 
728  if (!cat->seekable)
729  return AVERROR(ESPIPE); /* XXX: can we use it? */
730  if (flags & (AVSEEK_FLAG_BYTE | AVSEEK_FLAG_FRAME))
731  return AVERROR(ENOSYS);
732  cat->avf = NULL;
733  if ((ret = real_seek(avf, stream, min_ts, ts, max_ts, flags, cur_avf_saved)) < 0) {
734  if (cat->cur_file != cur_file_saved) {
735  if (cat->avf)
736  avformat_close_input(&cat->avf);
737  }
738  cat->avf = cur_avf_saved;
739  cat->cur_file = cur_file_saved;
740  } else {
741  if (cat->cur_file != cur_file_saved) {
742  avformat_close_input(&cur_avf_saved);
743  }
744  cat->eof = 0;
745  }
746  return ret;
747 }
748 
749 #define OFFSET(x) offsetof(ConcatContext, x)
750 #define DEC AV_OPT_FLAG_DECODING_PARAM
751 
752 static const AVOption options[] = {
753  { "safe", "enable safe mode",
754  OFFSET(safe), AV_OPT_TYPE_BOOL, {.i64 = 1}, -1, 1, DEC },
755  { "auto_convert", "automatically convert bitstream format",
756  OFFSET(auto_convert), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, DEC },
757  { "segment_time_metadata", "output file segment start time and duration as packet metadata",
758  OFFSET(segment_time_metadata), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, DEC },
759  { NULL }
760 };
761 
762 static const AVClass concat_class = {
763  .class_name = "concat demuxer",
764  .item_name = av_default_item_name,
765  .option = options,
766  .version = LIBAVUTIL_VERSION_INT,
767 };
768 
769 
771  .name = "concat",
772  .long_name = NULL_IF_CONFIG_SMALL("Virtual concatenation script"),
773  .priv_data_size = sizeof(ConcatContext),
778  .read_seek2 = concat_seek,
779  .priv_class = &concat_class,
780 };
void av_bsf_free(AVBSFContext **ctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
Definition: bsf.c:35
#define NULL
Definition: coverity.c:32
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:80
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t next_dts
Definition: concatdec.c:47
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5591
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1581
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
static int concat_read_close(AVFormatContext *avf)
Definition: concatdec.c:366
ConcatMatchMode
Definition: concatdec.c:31
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define DEC
Definition: concatdec.c:750
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:147
#define FAIL(retcode)
Definition: concatdec.c:105
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3812
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:934
static void rescale_interval(AVRational tb_in, AVRational tb_out, int64_t *min_ts, int64_t *ts, int64_t *max_ts)
Definition: concatdec.c:649
The bitstream filter state.
Definition: avcodec.h:5557
AVDictionary * metadata
Definition: concatdec.c:51
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:193
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
AVBSFContext * bsf
Definition: concatdec.c:37
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static AVPacket pkt
static const AVOption options[]
Definition: concatdec.c:752
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:134
int64_t outpoint
Definition: concatdec.c:50
Format I/O context.
Definition: avformat.h:1325
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx)
Allocate a context for a given bitstream filter.
Definition: bsf.c:81
int64_t cur_dts
Definition: avformat.h:1070
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 av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:196
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:97
static int concat_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:720
ConcatStream * streams
Definition: concatdec.c:48
static int64_t start_time
Definition: ffplay.c:327
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
static int nb_streams
Definition: ffprobe.c:276
#define av_malloc(s)
float delta
static int match_streams(AVFormatContext *avf)
Definition: concatdec.c:279
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
int id
Format-specific stream ID.
Definition: avformat.h:879
#define SPACE_CHARS
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4378
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
#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:770
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1436
static int flags
Definition: log.c:57
#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
static int probe(AVProbeData *p)
Definition: act.c:36
#define av_log(a,...)
int64_t inpoint
Definition: concatdec.c:49
static int concat_read_header(AVFormatContext *avf)
Definition: concatdec.c:386
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:38
int segment_time_metadata
Definition: concatdec.c:66
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2231
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned auto_convert
Definition: concatdec.c:65
#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
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int concat_probe(AVProbeData *probe)
Definition: concatdec.c:69
#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:945
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:112
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:44
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: avcodec.h:3830
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
static int match_streams_one_to_one(AVFormatContext *avf)
Definition: concatdec.c:237
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:3215
static int try_seek(AVFormatContext *avf, int stream, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: concatdec.c:659
char filename[1024]
input or output filename
Definition: avformat.h:1401
static int packet_after_outpoint(ConcatContext *cat, AVPacket *pkt)
Definition: concatdec.c:556
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
Definition: concatdec.c:530
static const AVClass concat_class
Definition: concatdec.c:762
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:175
static int open_file(AVFormatContext *avf, unsigned fileno)
Definition: concatdec.c:316
#define AVERROR_BSF_NOT_FOUND
Bitstream filter not found.
Definition: error.h:49
int n
Definition: avisynth_c.h:684
AVDictionary * metadata
Definition: avformat.h:936
#define AVFMT_FLAG_CUSTOM_IO
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition: avformat.h:1444
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:807
ConcatMatchMode stream_match_mode
Definition: concatdec.c:64
#define cat(a, bpp, b)
Definition: vp9dsp_init.h:29
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:528
Stream structure.
Definition: avformat.h:872
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:58
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
A list of zero terminated key/value strings.
Definition: avcodec.h:1258
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
ConcatFile * files
Definition: concatdec.c:57
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
Definition: avpacket.c:482
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:590
void * buf
Definition: avisynth_c.h:690
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
int nb_streams
Definition: concatdec.c:52
Describe the class of an AVClass context structure.
Definition: log.h:67
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define AVSEEK_FLAG_BYTE
seeking based on position in bytes
Definition: avformat.h:2412
const VDPAUPixFmtMap * map
static int match_streams_exact_id(AVFormatContext *avf)
Definition: concatdec.c:257
unsigned nb_files
Definition: concatdec.c:59
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
misc parsing utilities
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1712
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:2472
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
int64_t start_time
Definition: concatdec.c:43
static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: concatdec.c:565
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1410
char * url
Definition: concatdec.c:42
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
Main libavformat public API header.
static char * get_keyword(uint8_t **cursor)
Definition: concatdec.c:75
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3497
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
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4350
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:509
#define av_free(p)
static int copy_stream_props(AVStream *st, AVStream *source_st)
Definition: concatdec.c:165
int64_t duration
Definition: concatdec.c:46
#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:1353
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:515
#define AVSEEK_FLAG_FRAME
seeking based on frame number
Definition: avformat.h:2414
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3826
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:677
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1399
#define OFFSET(x)
Definition: concatdec.c:749
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1420
static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile, unsigned *nb_files_alloc)
Definition: concatdec.c:107
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
unbuffered private I/O API
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1014
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:195
static int safe_filename(const char *f)
Definition: concatdec.c:86
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
int stream_index
Definition: avcodec.h:1402
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:901
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:996
int64_t file_inpoint
Definition: concatdec.c:45
This structure stores compressed data.
Definition: avcodec.h:1377
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5585
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1393
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
AVFormatContext * avf
Definition: concatdec.c:60