FFmpeg
tee.c
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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_close = avf->io_close;
240  avf2->io_close2 = avf->io_close2;
242  avf2->flags = avf->flags;
244 
245  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
246  if (!tee_slave->stream_map) {
247  ret = AVERROR(ENOMEM);
248  goto end;
249  }
250 
251  stream_count = 0;
252  for (i = 0; i < avf->nb_streams; i++) {
253  st = avf->streams[i];
254  if (select) {
255  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
256  if (!tmp_select) {
257  ret = AVERROR(ENOMEM);
258  goto end;
259  }
260  fullret = 0;
261  first_subselect = tmp_select;
262  next_subselect = NULL;
263  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
264  first_subselect = NULL;
265 
266  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
267  if (ret < 0) {
268  av_log(avf, AV_LOG_ERROR,
269  "Invalid stream specifier '%s' for output '%s'\n",
270  subselect, slave);
271  goto end;
272  }
273  if (ret != 0) {
274  fullret = 1; // match
275  break;
276  }
277  }
278  av_freep(&tmp_select);
279 
280  if (fullret == 0) { /* no match */
281  tee_slave->stream_map[i] = -1;
282  continue;
283  }
284  }
285  tee_slave->stream_map[i] = stream_count++;
286 
287  st2 = ff_stream_clone(avf2, st);
288  if (!st2) {
289  ret = AVERROR(ENOMEM);
290  goto end;
291  }
292  }
293 
294  ret = ff_format_output_open(avf2, filename, &options);
295  if (ret < 0) {
296  av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
297  av_err2str(ret));
298  goto end;
299  }
300 
301  if ((ret = avformat_write_header(avf2, &options)) < 0) {
302  av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
303  slave, av_err2str(ret));
304  goto end;
305  }
306  tee_slave->header_written = 1;
307 
308  tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
309  if (!tee_slave->bsfs) {
310  ret = AVERROR(ENOMEM);
311  goto end;
312  }
313 
314  entry = NULL;
315  while (entry = av_dict_get(bsf_options, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
316  const char *spec = entry->key;
317  if (*spec) {
318  if (strspn(spec, slave_bsfs_spec_sep) != 1) {
319  av_log(avf, AV_LOG_ERROR,
320  "Specifier separator in '%s' is '%c', but only characters '%s' "
321  "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
322  ret = AVERROR(EINVAL);
323  goto end;
324  }
325  spec++; /* consume separator */
326  }
327 
328  for (i = 0; i < avf2->nb_streams; i++) {
329  ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
330  if (ret < 0) {
331  av_log(avf, AV_LOG_ERROR,
332  "Invalid stream specifier '%s' in bsfs option '%s' for slave "
333  "output '%s'\n", spec, entry->key, filename);
334  goto end;
335  }
336 
337  if (ret > 0) {
338  av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
339  "output '%s'\n", spec, entry->value, i, filename);
340  if (tee_slave->bsfs[i]) {
341  av_log(avf, AV_LOG_WARNING,
342  "Duplicate bsfs specification associated to stream %d of slave "
343  "output '%s', filters will be ignored\n", i, filename);
344  continue;
345  }
346  ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
347  if (ret < 0) {
348  av_log(avf, AV_LOG_ERROR,
349  "Error parsing bitstream filter sequence '%s' associated to "
350  "stream %d of slave output '%s'\n", entry->value, i, filename);
351  goto end;
352  }
353  }
354  }
355 
356  av_dict_set(&bsf_options, entry->key, NULL, 0);
357  }
358 
359  for (i = 0; i < avf->nb_streams; i++){
360  int target_stream = tee_slave->stream_map[i];
361  if (target_stream < 0)
362  continue;
363 
364  if (!tee_slave->bsfs[target_stream]) {
365  /* Add pass-through bitstream filter */
366  ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
367  if (ret < 0) {
368  av_log(avf, AV_LOG_ERROR,
369  "Failed to create pass-through bitstream filter: %s\n",
370  av_err2str(ret));
371  goto end;
372  }
373  }
374 
375  tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
376  ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
377  avf->streams[i]->codecpar);
378  if (ret < 0)
379  goto end;
380 
381  ret = av_bsf_init(tee_slave->bsfs[target_stream]);
382  if (ret < 0) {
383  av_log(avf, AV_LOG_ERROR,
384  "Failed to initialize bitstream filter(s): %s\n",
385  av_err2str(ret));
386  goto end;
387  }
388  }
389 
390  if (options) {
391  entry = NULL;
392  while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
393  av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
395  goto end;
396  }
397 
398 end:
399  av_free(format);
400  av_free(select);
402  av_dict_free(&bsf_options);
403  av_freep(&tmp_select);
404  return ret;
405 }
406 
407 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
408 {
409  int i;
410  av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
411  slave->avf->url, slave->avf->oformat->name);
412  for (i = 0; i < slave->avf->nb_streams; i++) {
413  AVStream *st = slave->avf->streams[i];
414  AVBSFContext *bsf = slave->bsfs[i];
415  const char *bsf_name;
416 
417  av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
420 
421  bsf_name = bsf->filter->priv_class ?
422  bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
423  av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
424  }
425 }
426 
427 static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
428 {
429  TeeContext *tee = avf->priv_data;
430  TeeSlave *tee_slave = &tee->slaves[slave_idx];
431 
432  tee->nb_alive--;
433 
434  close_slave(tee_slave);
435 
436  if (!tee->nb_alive) {
437  av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
438  return err_n;
439  } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
440  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
441  return err_n;
442  } else {
443  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
444  slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
445  return 0;
446  }
447 }
448 
450 {
451  TeeContext *tee = avf->priv_data;
452  unsigned nb_slaves = 0, i;
453  const char *filename = avf->url;
454  char **slaves = NULL;
455  int ret;
456 
457  while (*filename) {
458  char *slave = av_get_token(&filename, slave_delim);
459  if (!slave) {
460  ret = AVERROR(ENOMEM);
461  goto fail;
462  }
463  ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
464  if (ret < 0) {
465  av_free(slave);
466  goto fail;
467  }
468  if (strspn(filename, slave_delim))
469  filename++;
470  }
471 
472  if (!FF_ALLOCZ_TYPED_ARRAY(tee->slaves, nb_slaves)) {
473  ret = AVERROR(ENOMEM);
474  goto fail;
475  }
476  tee->nb_slaves = tee->nb_alive = nb_slaves;
477 
478  for (i = 0; i < nb_slaves; i++) {
479 
480  tee->slaves[i].use_fifo = tee->use_fifo;
481  ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
482  if (ret < 0)
483  goto fail;
484 
485  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
487  if (ret < 0)
488  goto fail;
489  } else {
490  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
491  }
492  av_freep(&slaves[i]);
493  }
494 
495  for (i = 0; i < avf->nb_streams; i++) {
496  int j, mapped = 0;
497  for (j = 0; j < tee->nb_slaves; j++)
498  if (tee->slaves[j].avf)
499  mapped += tee->slaves[j].stream_map[i] >= 0;
500  if (!mapped)
501  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
502  "to any slave.\n", i);
503  }
504  av_free(slaves);
505  return 0;
506 
507 fail:
508  for (i = 0; i < nb_slaves; i++)
509  av_freep(&slaves[i]);
510  close_slaves(avf);
511  av_free(slaves);
512  return ret;
513 }
514 
516 {
517  TeeContext *tee = avf->priv_data;
518  int ret_all = 0, ret;
519  unsigned i;
520 
521  for (i = 0; i < tee->nb_slaves; i++) {
522  if ((ret = close_slave(&tee->slaves[i])) < 0) {
524  if (!ret_all && ret < 0)
525  ret_all = ret;
526  }
527  }
528  av_freep(&tee->slaves);
529  return ret_all;
530 }
531 
533 {
534  TeeContext *tee = avf->priv_data;
535  AVFormatContext *avf2;
536  AVBSFContext *bsfs;
537  AVPacket *const pkt2 = ffformatcontext(avf)->pkt;
538  int ret_all = 0, ret;
539  unsigned i, s;
540  int s2;
541 
542  for (i = 0; i < tee->nb_slaves; i++) {
543  if (!(avf2 = tee->slaves[i].avf))
544  continue;
545 
546  /* Flush slave if pkt is NULL*/
547  if (!pkt) {
549  if (ret < 0) {
551  if (!ret_all && ret < 0)
552  ret_all = ret;
553  }
554  continue;
555  }
556 
557  s = pkt->stream_index;
558  s2 = tee->slaves[i].stream_map[s];
559  if (s2 < 0)
560  continue;
561 
562  if ((ret = av_packet_ref(pkt2, pkt)) < 0) {
563  if (!ret_all)
564  ret_all = ret;
565  continue;
566  }
567  bsfs = tee->slaves[i].bsfs[s2];
568  pkt2->stream_index = s2;
569 
570  ret = av_bsf_send_packet(bsfs, pkt2);
571  if (ret < 0) {
572  av_packet_unref(pkt2);
573  av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
574  av_err2str(ret));
576  if (!ret_all && ret < 0)
577  ret_all = ret;
578  }
579 
580  while(1) {
581  ret = av_bsf_receive_packet(bsfs, pkt2);
582  if (ret == AVERROR(EAGAIN)) {
583  ret = 0;
584  break;
585  } else if (ret < 0) {
586  break;
587  }
588 
590  avf2->streams[s2]->time_base);
591  ret = av_interleaved_write_frame(avf2, pkt2);
592  if (ret < 0)
593  break;
594  };
595 
596  if (ret < 0) {
598  if (!ret_all && ret < 0)
599  ret_all = ret;
600  }
601  }
602  return ret_all;
603 }
604 
606  .name = "tee",
607  .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
608  .priv_data_size = sizeof(TeeContext),
612  .priv_class = &tee_muxer_class,
614 };
FF_ALLOCZ_TYPED_ARRAY
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem)
Definition: internal.h:97
av_packet_unref
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:422
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:57
TeeSlave::stream_map
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:49
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:154
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:191
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:218
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1284
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1513
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:251
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:68
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:515
AVDictionary
Definition: dict.c:31
tee_write_packet
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:532
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:53
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
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:1483
bsf.h
fail
#define fail()
Definition: checkasm.h:133
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:72
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:1445
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:41
s
#define s(width, name)
Definition: cbs_vp9.c:256
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:281
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:1334
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:189
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:1722
tee_process_slave_failure
static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
Definition: tee.c:427
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:449
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
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:150
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:978
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:231
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:100
AV_OPT_TYPE_DICT
@ AV_OPT_TYPE_DICT
Definition: opt.h:232
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:1258
TeeContext::nb_alive
unsigned nb_alive
Definition: tee.c:56
AVBitStreamFilter::priv_class
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: bsf.h:130
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:430
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:1272
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:611
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:115
av_bsf_send_packet
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:203
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:1299
AVFMT_ALLOW_FLUSH
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:490
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:470
ff_format_io_close
int ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: avformat.c:845
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:208
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:526
TeeSlave::use_fifo
int use_fifo
Definition: tee.c:44
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:74
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:436
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:1253
AVOutputFormat
Definition: avformat.h:509
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
TeeSlave::header_written
int header_written
Definition: tee.c:50
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:272
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:948
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:554
AVFormatContext::oformat
const struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1235
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:407
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:323
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:449
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:356
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: avformat.c:95
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:185
AVFormatContext::io_close
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1782
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:1776
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:376
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:280
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:527
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:141
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVDictionaryEntry
Definition: dict.h:79
ff_tee_muxer
const AVOutputFormat ff_tee_muxer
Definition: tee.c:605
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
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:286
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
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:1238
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:71
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:235
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:222
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:1823
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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:117
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:91
write_packet
static int write_packet(OutputFile *of, OutputStream *ost, AVPacket *pkt)
Definition: ffmpeg_mux.c:90
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1244
mux.h