FFmpeg
tee.c
Go to the documentation of this file.
1 /*
2  * Tee pseudo-muxer
3  * Copyright (c) 2012 Nicolas George
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public License
9  * as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 
23 #include "libavutil/avutil.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/opt.h"
26 #include "libavcodec/bsf.h"
27 #include "internal.h"
28 #include "avformat.h"
29 #include "mux.h"
30 #include "tee_common.h"
31 
32 typedef enum {
36 
37 #define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
38 
39 typedef struct {
41  AVBSFContext **bsfs; ///< bitstream filters per stream
42 
44  int use_fifo;
46 
47  /** map from input to output streams indexes,
48  * disabled output streams are set to -1 */
49  int *stream_map;
51 } TeeSlave;
52 
53 typedef struct TeeContext {
54  const AVClass *class;
55  unsigned nb_slaves;
56  unsigned nb_alive;
58  int use_fifo;
60 } TeeContext;
61 
62 static const char *const slave_delim = "|";
63 static const char *const slave_bsfs_spec_sep = "/";
64 static const char *const slave_select_sep = ",";
65 
66 #define OFFSET(x) offsetof(TeeContext, x)
67 static const AVOption options[] = {
68  {"use_fifo", "Use fifo pseudo-muxer to separate actual muxers from encoder",
69  OFFSET(use_fifo), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
70  {"fifo_options", "fifo pseudo-muxer options", OFFSET(fifo_options),
72  {NULL}
73 };
74 
75 static const AVClass tee_muxer_class = {
76  .class_name = "Tee muxer",
77  .item_name = av_default_item_name,
78  .option = options,
79  .version = LIBAVUTIL_VERSION_INT,
80 };
81 
82 static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
83 {
84  if (!opt) {
86  return 0;
87  } else if (!av_strcasecmp("abort", opt)) {
88  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
89  return 0;
90  } else if (!av_strcasecmp("ignore", opt)) {
91  tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
92  return 0;
93  }
94  /* Set failure behaviour to abort, so invalid option error will not be ignored */
95  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
96  return AVERROR(EINVAL);
97 }
98 
99 static int parse_slave_fifo_policy(const char *use_fifo, TeeSlave *tee_slave)
100 {
101  /*TODO - change this to use proper function for parsing boolean
102  * options when there is one */
103  if (av_match_name(use_fifo, "true,y,yes,enable,enabled,on,1")) {
104  tee_slave->use_fifo = 1;
105  } else if (av_match_name(use_fifo, "false,n,no,disable,disabled,off,0")) {
106  tee_slave->use_fifo = 0;
107  } else {
108  return AVERROR(EINVAL);
109  }
110  return 0;
111 }
112 
113 static int parse_slave_fifo_options(const char *fifo_options, TeeSlave *tee_slave)
114 {
115  return av_dict_parse_string(&tee_slave->fifo_options, fifo_options, "=", ":", 0);
116 }
117 
118 static int close_slave(TeeSlave *tee_slave)
119 {
120  AVFormatContext *avf;
121  unsigned i;
122  int ret = 0;
123 
124  av_dict_free(&tee_slave->fifo_options);
125  avf = tee_slave->avf;
126  if (!avf)
127  return 0;
128 
129  if (tee_slave->header_written)
130  ret = av_write_trailer(avf);
131 
132  if (tee_slave->bsfs) {
133  for (i = 0; i < avf->nb_streams; ++i)
134  av_bsf_free(&tee_slave->bsfs[i]);
135  }
136  av_freep(&tee_slave->stream_map);
137  av_freep(&tee_slave->bsfs);
138 
139  ff_format_io_close(avf, &avf->pb);
141  tee_slave->avf = NULL;
142  return ret;
143 }
144 
145 static void close_slaves(AVFormatContext *avf)
146 {
147  TeeContext *tee = avf->priv_data;
148  unsigned i;
149 
150  for (i = 0; i < tee->nb_slaves; i++) {
151  close_slave(&tee->slaves[i]);
152  }
153  av_freep(&tee->slaves);
154 }
155 
156 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
157 {
158  int i, ret;
159  AVDictionary *options = NULL, *bsf_options = NULL;
160  AVDictionaryEntry *entry;
161  char *filename;
162  char *format = NULL, *select = NULL, *on_fail = NULL;
163  char *use_fifo = NULL, *fifo_options_str = NULL;
164  AVFormatContext *avf2 = NULL;
165  AVStream *st, *st2;
166  int stream_count;
167  int fullret;
168  char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
169 
170  if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
171  return ret;
172 
173 #define CONSUME_OPTION(option, field, action) do { \
174  if ((entry = av_dict_get(options, option, NULL, 0))) { \
175  field = entry->value; \
176  { action } \
177  av_dict_set(&options, option, NULL, 0); \
178  } \
179  } while (0)
180 #define STEAL_OPTION(option, field) \
181  CONSUME_OPTION(option, field, \
182  entry->value = NULL; /* prevent it from being freed */)
183 #define PROCESS_OPTION(option, field, function, on_error) \
184  CONSUME_OPTION(option, field, if ((ret = function) < 0) { { on_error } goto end; })
185 
186  STEAL_OPTION("f", format);
187  STEAL_OPTION("select", select);
188  PROCESS_OPTION("onfail", on_fail,
189  parse_slave_failure_policy_option(on_fail, tee_slave),
190  av_log(avf, AV_LOG_ERROR, "Invalid onfail option value, "
191  "valid options are 'abort' and 'ignore'\n"););
192  PROCESS_OPTION("use_fifo", use_fifo,
193  parse_slave_fifo_policy(use_fifo, tee_slave),
194  av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n",
195  av_err2str(ret)););
196  PROCESS_OPTION("fifo_options", fifo_options_str,
197  parse_slave_fifo_options(fifo_options_str, tee_slave), ;);
198  entry = NULL;
199  while ((entry = av_dict_get(options, "bsfs", entry, AV_DICT_IGNORE_SUFFIX))) {
200  /* trim out strlen("bsfs") characters from key */
201  av_dict_set(&bsf_options, entry->key + 4, entry->value, 0);
202  av_dict_set(&options, entry->key, NULL, 0);
203  }
204 
205  if (tee_slave->use_fifo) {
206 
207  if (options) {
208  char *format_options_str = NULL;
209  ret = av_dict_get_string(options, &format_options_str, '=', ':');
210  if (ret < 0)
211  goto end;
212 
213  ret = av_dict_set(&tee_slave->fifo_options, "format_opts", format_options_str,
215  if (ret < 0)
216  goto end;
217  }
218 
219  if (format) {
220  ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
222  format = NULL;
223  if (ret < 0)
224  goto end;
225  }
226 
228  options = tee_slave->fifo_options;
229  tee_slave->fifo_options = NULL;
230  }
232  tee_slave->use_fifo ? "fifo" :format, filename);
233  if (ret < 0)
234  goto end;
235  tee_slave->avf = avf2;
236  av_dict_copy(&avf2->metadata, avf->metadata, 0);
237  avf2->opaque = avf->opaque;
238  avf2->io_open = avf->io_open;
239  avf2->io_close2 = avf->io_close2;
241  avf2->flags = avf->flags;
243 
244  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
245  if (!tee_slave->stream_map) {
246  ret = AVERROR(ENOMEM);
247  goto end;
248  }
249 
250  stream_count = 0;
251  for (i = 0; i < avf->nb_streams; i++) {
252  st = avf->streams[i];
253  if (select) {
254  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
255  if (!tmp_select) {
256  ret = AVERROR(ENOMEM);
257  goto end;
258  }
259  fullret = 0;
260  first_subselect = tmp_select;
261  next_subselect = NULL;
262  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
263  first_subselect = NULL;
264 
265  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
266  if (ret < 0) {
267  av_log(avf, AV_LOG_ERROR,
268  "Invalid stream specifier '%s' for output '%s'\n",
269  subselect, slave);
270  goto end;
271  }
272  if (ret != 0) {
273  fullret = 1; // match
274  break;
275  }
276  }
277  av_freep(&tmp_select);
278 
279  if (fullret == 0) { /* no match */
280  tee_slave->stream_map[i] = -1;
281  continue;
282  }
283  }
284  tee_slave->stream_map[i] = stream_count++;
285 
286  st2 = ff_stream_clone(avf2, st);
287  if (!st2) {
288  ret = AVERROR(ENOMEM);
289  goto end;
290  }
291  }
292 
293  ret = ff_format_output_open(avf2, filename, &options);
294  if (ret < 0) {
295  av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
296  av_err2str(ret));
297  goto end;
298  }
299 
300  if ((ret = avformat_write_header(avf2, &options)) < 0) {
301  av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
302  slave, av_err2str(ret));
303  goto end;
304  }
305  tee_slave->header_written = 1;
306 
307  tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
308  if (!tee_slave->bsfs) {
309  ret = AVERROR(ENOMEM);
310  goto end;
311  }
312 
313  entry = NULL;
314  while (entry = av_dict_get(bsf_options, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
315  const char *spec = entry->key;
316  if (*spec) {
317  if (strspn(spec, slave_bsfs_spec_sep) != 1) {
318  av_log(avf, AV_LOG_ERROR,
319  "Specifier separator in '%s' is '%c', but only characters '%s' "
320  "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
321  ret = AVERROR(EINVAL);
322  goto end;
323  }
324  spec++; /* consume separator */
325  }
326 
327  for (i = 0; i < avf2->nb_streams; i++) {
328  ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
329  if (ret < 0) {
330  av_log(avf, AV_LOG_ERROR,
331  "Invalid stream specifier '%s' in bsfs option '%s' for slave "
332  "output '%s'\n", spec, entry->key, filename);
333  goto end;
334  }
335 
336  if (ret > 0) {
337  av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
338  "output '%s'\n", spec, entry->value, i, filename);
339  if (tee_slave->bsfs[i]) {
340  av_log(avf, AV_LOG_WARNING,
341  "Duplicate bsfs specification associated to stream %d of slave "
342  "output '%s', filters will be ignored\n", i, filename);
343  continue;
344  }
345  ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
346  if (ret < 0) {
347  av_log(avf, AV_LOG_ERROR,
348  "Error parsing bitstream filter sequence '%s' associated to "
349  "stream %d of slave output '%s'\n", entry->value, i, filename);
350  goto end;
351  }
352  }
353  }
354 
355  av_dict_set(&bsf_options, entry->key, NULL, 0);
356  }
357 
358  for (i = 0; i < avf->nb_streams; i++){
359  int target_stream = tee_slave->stream_map[i];
360  if (target_stream < 0)
361  continue;
362 
363  if (!tee_slave->bsfs[target_stream]) {
364  /* Add pass-through bitstream filter */
365  ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
366  if (ret < 0) {
367  av_log(avf, AV_LOG_ERROR,
368  "Failed to create pass-through bitstream filter: %s\n",
369  av_err2str(ret));
370  goto end;
371  }
372  }
373 
374  tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
375  ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
376  avf->streams[i]->codecpar);
377  if (ret < 0)
378  goto end;
379 
380  ret = av_bsf_init(tee_slave->bsfs[target_stream]);
381  if (ret < 0) {
382  av_log(avf, AV_LOG_ERROR,
383  "Failed to initialize bitstream filter(s): %s\n",
384  av_err2str(ret));
385  goto end;
386  }
387  }
388 
389  if (options) {
390  entry = NULL;
391  while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
392  av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
394  goto end;
395  }
396 
397 end:
398  av_free(format);
399  av_free(select);
401  av_dict_free(&bsf_options);
402  av_freep(&tmp_select);
403  return ret;
404 }
405 
406 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
407 {
408  int i;
409  av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
410  slave->avf->url, slave->avf->oformat->name);
411  for (i = 0; i < slave->avf->nb_streams; i++) {
412  AVStream *st = slave->avf->streams[i];
413  AVBSFContext *bsf = slave->bsfs[i];
414  const char *bsf_name;
415 
416  av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
419 
420  bsf_name = bsf->filter->priv_class ?
421  bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
422  av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
423  }
424 }
425 
426 static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
427 {
428  TeeContext *tee = avf->priv_data;
429  TeeSlave *tee_slave = &tee->slaves[slave_idx];
430 
431  tee->nb_alive--;
432 
433  close_slave(tee_slave);
434 
435  if (!tee->nb_alive) {
436  av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
437  return err_n;
438  } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
439  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
440  return err_n;
441  } else {
442  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
443  slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
444  return 0;
445  }
446 }
447 
449 {
450  TeeContext *tee = avf->priv_data;
451  unsigned nb_slaves = 0, i;
452  const char *filename = avf->url;
453  char **slaves = NULL;
454  int ret;
455 
456  while (*filename) {
457  char *slave = av_get_token(&filename, slave_delim);
458  if (!slave) {
459  ret = AVERROR(ENOMEM);
460  goto fail;
461  }
462  ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
463  if (ret < 0) {
464  av_free(slave);
465  goto fail;
466  }
467  if (strspn(filename, slave_delim))
468  filename++;
469  }
470 
471  if (!FF_ALLOCZ_TYPED_ARRAY(tee->slaves, nb_slaves)) {
472  ret = AVERROR(ENOMEM);
473  goto fail;
474  }
475  tee->nb_slaves = tee->nb_alive = nb_slaves;
476 
477  for (i = 0; i < nb_slaves; i++) {
478 
479  tee->slaves[i].use_fifo = tee->use_fifo;
480  ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
481  if (ret < 0)
482  goto fail;
483 
484  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
486  if (ret < 0)
487  goto fail;
488  } else {
489  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
490  }
491  av_freep(&slaves[i]);
492  }
493 
494  for (i = 0; i < avf->nb_streams; i++) {
495  int j, mapped = 0;
496  for (j = 0; j < tee->nb_slaves; j++)
497  if (tee->slaves[j].avf)
498  mapped += tee->slaves[j].stream_map[i] >= 0;
499  if (!mapped)
500  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
501  "to any slave.\n", i);
502  }
503  av_free(slaves);
504  return 0;
505 
506 fail:
507  for (i = 0; i < nb_slaves; i++)
508  av_freep(&slaves[i]);
509  close_slaves(avf);
510  av_free(slaves);
511  return ret;
512 }
513 
515 {
516  TeeContext *tee = avf->priv_data;
517  int ret_all = 0, ret;
518  unsigned i;
519 
520  for (i = 0; i < tee->nb_slaves; i++) {
521  if ((ret = close_slave(&tee->slaves[i])) < 0) {
523  if (!ret_all && ret < 0)
524  ret_all = ret;
525  }
526  }
527  av_freep(&tee->slaves);
528  return ret_all;
529 }
530 
532 {
533  TeeContext *tee = avf->priv_data;
534  AVFormatContext *avf2;
535  AVBSFContext *bsfs;
536  AVPacket *const pkt2 = ffformatcontext(avf)->pkt;
537  int ret_all = 0, ret;
538  unsigned i, s;
539  int s2;
540 
541  for (i = 0; i < tee->nb_slaves; i++) {
542  if (!(avf2 = tee->slaves[i].avf))
543  continue;
544 
545  /* Flush slave if pkt is NULL*/
546  if (!pkt) {
548  if (ret < 0) {
550  if (!ret_all && ret < 0)
551  ret_all = ret;
552  }
553  continue;
554  }
555 
556  s = pkt->stream_index;
557  s2 = tee->slaves[i].stream_map[s];
558  if (s2 < 0)
559  continue;
560 
561  if ((ret = av_packet_ref(pkt2, pkt)) < 0) {
562  if (!ret_all)
563  ret_all = ret;
564  continue;
565  }
566  bsfs = tee->slaves[i].bsfs[s2];
567  pkt2->stream_index = s2;
568 
569  ret = av_bsf_send_packet(bsfs, pkt2);
570  if (ret < 0) {
571  av_packet_unref(pkt2);
572  av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
573  av_err2str(ret));
575  if (!ret_all && ret < 0)
576  ret_all = ret;
577  }
578 
579  while(1) {
580  ret = av_bsf_receive_packet(bsfs, pkt2);
581  if (ret == AVERROR(EAGAIN)) {
582  ret = 0;
583  break;
584  } else if (ret < 0) {
585  break;
586  }
587 
589  avf2->streams[s2]->time_base);
590  ret = av_interleaved_write_frame(avf2, pkt2);
591  if (ret < 0)
592  break;
593  };
594 
595  if (ret < 0) {
597  if (!ret_all && ret < 0)
598  ret_all = ret;
599  }
600  }
601  return ret_all;
602 }
603 
605  .p.name = "tee",
606  .p.long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
607  .priv_data_size = sizeof(TeeContext),
611  .p.priv_class = &tee_muxer_class,
613  .p.flags = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH | AVFMT_TS_NEGATIVE,
614 #else
615  .p.flags = AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
616 #endif
617  .flags_internal = FF_FMT_ALLOW_FLUSH,
618 };
FF_ALLOCZ_TYPED_ARRAY
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem)
Definition: internal.h:88
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:427
AVBSFContext::par_in
AVCodecParameters * par_in
Parameters of the input stream.
Definition: bsf.h:90
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
ON_SLAVE_FAILURE_IGNORE
@ ON_SLAVE_FAILURE_IGNORE
Definition: tee.c:34
AVOutputFormat::name
const char * name
Definition: avformat.h:510
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
TeeSlave::bsfs
AVBSFContext ** bsfs
bitstream filters per stream
Definition: tee.c:41
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
TeeSlave::stream_map
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:49
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:194
AVBitStreamFilter::name
const char * name
Definition: bsf.h:112
av_strcasecmp
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:207
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1323
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1612
parse_slave_fifo_options
static int parse_slave_fifo_options(const char *fifo_options, TeeSlave *tee_slave)
Definition: tee.c:113
OFFSET
#define OFFSET(x)
Definition: tee.c:66
ff_tee_parse_slave_options
int ff_tee_parse_slave_options(void *log, char *slave, AVDictionary **options, char **filename)
Definition: tee_common.c:33
AVOption
AVOption.
Definition: opt.h:346
AV_DICT_IGNORE_SUFFIX
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key,...
Definition: dict.h:75
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
tee_write_trailer
static int tee_write_trailer(AVFormatContext *avf)
Definition: tee.c:514
AVDictionary
Definition: dict.c:34
tee_write_packet
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:531
av_bsf_free
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:52
TeeContext::use_fifo
int use_fifo
Definition: tee.c:58
TeeContext::nb_slaves
unsigned nb_slaves
Definition: tee.c:55
AVBSFContext
The bitstream filter state.
Definition: bsf.h:68
FFOutputFormat::p
AVOutputFormat p
The public AVOutputFormat.
Definition: mux.h:36
ON_SLAVE_FAILURE_ABORT
@ ON_SLAVE_FAILURE_ABORT
Definition: tee.c:33
STEAL_OPTION
#define STEAL_OPTION(option, field)
tee_common.h
AVFormatContext::interrupt_callback
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1528
bsf.h
FF_FMT_ALLOW_FLUSH
#define FF_FMT_ALLOW_FLUSH
Definition: mux.h:30
fail
#define fail()
Definition: checkasm.h:179
AVERROR_OPTION_NOT_FOUND
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:63
parse_slave_fifo_policy
static int parse_slave_fifo_policy(const char *use_fifo, TeeSlave *tee_slave)
Definition: tee.c:99
AV_DICT_DONT_STRDUP_VAL
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that's been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:79
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1490
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:62
s
#define s(width, name)
Definition: cbs_vp9.c:198
tee_muxer_class
static const AVClass tee_muxer_class
Definition: tee.c:75
AVFormatContext::flags
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1406
format
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate. The lists are not just lists
slave_bsfs_spec_sep
static const char *const slave_bsfs_spec_sep
Definition: tee.c:63
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:178
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
TeeContext::slaves
TeeSlave * slaves
Definition: tee.c:57
AVBSFContext::time_base_in
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: bsf.h:102
TeeContext::fifo_options
AVDictionary * fifo_options
Definition: tee.c:59
slave_select_sep
static const char *const slave_select_sep
Definition: tee.c:64
AVFormatContext::opaque
void * opaque
User data.
Definition: avformat.h:1815
tee_process_slave_failure
static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
Definition: tee.c:426
avformat_write_header
av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and write the stream header to an output media file.
Definition: mux.c:456
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
av_bsf_init
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:149
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:782
NULL
#define NULL
Definition: coverity.c:32
av_bsf_receive_packet
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:230
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:101
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Definition: opt.h:242
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
close_slave
static int close_slave(TeeSlave *tee_slave)
Definition: tee.c:118
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1297
TeeContext::nb_alive
unsigned nb_alive
Definition: tee.c:56
ff_tee_muxer
const FFOutputFormat ff_tee_muxer
Definition: tee.c:604
AVBitStreamFilter::priv_class
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: bsf.h:130
FFOutputFormat
Definition: mux.h:32
av_packet_ref
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:435
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
A generic parameter which can be set by the user for muxing or encoding.
Definition: opt.h:269
TeeSlave::on_fail
SlaveFailurePolicy on_fail
Definition: tee.c:43
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1311
s2
#define s2
Definition: regdef.h:39
TeeSlave
Definition: tee.c:39
avformat_match_stream_specifier
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the stream st contained in s is matched by the stream specifier spec.
Definition: avformat.c:681
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
av_bsf_send_packet
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:202
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:121
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1371
close_slaves
static void close_slaves(AVFormatContext *avf)
Definition: tee.c:145
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:468
ff_format_io_close
int ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: avformat.c:944
TeeSlave::fifo_options
AVDictionary * fifo_options
Definition: tee.c:45
DEFAULT_SLAVE_FAILURE_POLICY
#define DEFAULT_SLAVE_FAILURE_POLICY
Definition: tee.c:37
TeeContext
Definition: tee.c:53
av_dict_free
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:223
options
static const AVOption options[]
Definition: tee.c:67
av_packet_rescale_ts
void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
Definition: avpacket.c:531
TeeSlave::use_fifo
int use_fifo
Definition: tee.c:44
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:406
open_slave
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
Definition: tee.c:156
av_write_trailer
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1270
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
TeeSlave::header_written
int header_written
Definition: tee.c:50
else
else
Definition: snow.txt:125
AVBSFContext::time_base_out
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: bsf.h:108
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
FF_API_ALLOW_FLUSH
#define FF_API_ALLOW_FLUSH
Definition: version_major.h:46
write_packet
static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
Definition: ffmpeg_mux.c:209
AVFMT_TS_NEGATIVE
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:494
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
AVClass::class_name
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:71
av_bsf_get_null_filter
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:553
AVFormatContext::oformat
const struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1274
avformat.h
parse_slave_failure_policy_option
static int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
Definition: tee.c:82
log_slave
static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
Definition: tee.c:406
av_dynarray_add_nofree
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:313
av_get_media_type_string
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:28
SlaveFailurePolicy
SlaveFailurePolicy
Definition: tee.c:32
tee_write_header
static int tee_write_header(AVFormatContext *avf)
Definition: tee.c:448
av_get_token
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:143
av_match_name
int av_match_name(const char *name, const char *names)
Match instances of a name in a comma-separated list of names.
Definition: avstring.c:345
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: avformat.c:141
av_dict_parse_string
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:200
AVFormatContext::io_open
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1856
slave_delim
static const char *const slave_delim
Definition: tee.c:62
PROCESS_OPTION
#define PROCESS_OPTION(option, field, function, on_error)
AVPacket::stream_index
int stream_index
Definition: packet.h:524
AVBSFContext::filter
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: bsf.h:77
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:270
av_bsf_list_parse_str
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf_lst)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
Definition: bsf.c:526
avutil.h
TeeSlave::avf
AVFormatContext * avf
Definition: tee.c:40
FFFormatContext::pkt
AVPacket * pkt
Used to hold temporary packets for the generic demuxing code.
Definition: internal.h:140
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVDictionaryEntry
Definition: dict.h:89
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
ff_stream_clone
AVStream * ff_stream_clone(AVFormatContext *dst_ctx, const AVStream *src)
Create a new stream and copy to it all parameters from a source stream, with the exception of the ind...
Definition: avformat.c:306
AVPacket
This structure stores compressed data.
Definition: packet.h:499
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:251
av_interleaved_write_frame
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1255
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:88
av_dict_get_string
int av_dict_get_string(const AVDictionary *m, char **buffer, const char key_val_sep, const char pairs_sep)
Get dictionary entries as a string.
Definition: dict.c:250
av_dict_copy
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:237
AVFormatContext::io_close2
int(* io_close2)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1870
ff_format_output_open
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: mux_utils.c:106
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
avstring.h
AVClass::item_name
const char *(* item_name)(void *ctx)
A pointer to a function which returns the name of a context instance ctx associated with the class.
Definition: log.h:77
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
avformat_alloc_output_context2
int avformat_alloc_output_context2(AVFormatContext **ctx, const AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:93
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1283
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:106
mux.h