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 "internal.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "tee_common.h"
30 
31 typedef enum {
35 
36 #define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
37 
38 typedef struct {
40  AVBSFContext **bsfs; ///< bitstream filters per stream
41 
43  int use_fifo;
45 
46  /** map from input to output streams indexes,
47  * disabled output streams are set to -1 */
48  int *stream_map;
50 } TeeSlave;
51 
52 typedef struct TeeContext {
53  const AVClass *class;
54  unsigned nb_slaves;
55  unsigned nb_alive;
57  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_str),
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_options(const char *use_fifo,
100  const char *fifo_options, TeeSlave *tee_slave)
101 {
102  int ret = 0;
103 
104  if (use_fifo) {
105  /*TODO - change this to use proper function for parsing boolean
106  * options when there is one */
107  if (av_match_name(use_fifo, "true,y,yes,enable,enabled,on,1")) {
108  tee_slave->use_fifo = 1;
109  } else if (av_match_name(use_fifo, "false,n,no,disable,disabled,off,0")) {
110  tee_slave->use_fifo = 0;
111  } else {
112  return AVERROR(EINVAL);
113  }
114  }
115 
116  if (fifo_options)
117  ret = av_dict_parse_string(&tee_slave->fifo_options, fifo_options, "=", ":", 0);
118 
119  return ret;
120 }
121 
122 static int close_slave(TeeSlave *tee_slave)
123 {
124  AVFormatContext *avf;
125  unsigned i;
126  int ret = 0;
127 
128  avf = tee_slave->avf;
129  if (!avf)
130  return 0;
131 
132  if (tee_slave->header_written)
133  ret = av_write_trailer(avf);
134 
135  if (tee_slave->bsfs) {
136  for (i = 0; i < avf->nb_streams; ++i)
137  av_bsf_free(&tee_slave->bsfs[i]);
138  }
139  av_freep(&tee_slave->stream_map);
140  av_freep(&tee_slave->bsfs);
141 
142  ff_format_io_close(avf, &avf->pb);
144  tee_slave->avf = NULL;
145  return ret;
146 }
147 
148 static void close_slaves(AVFormatContext *avf)
149 {
150  TeeContext *tee = avf->priv_data;
151  unsigned i;
152 
153  for (i = 0; i < tee->nb_slaves; i++) {
154  close_slave(&tee->slaves[i]);
155  }
156  av_freep(&tee->slaves);
157 }
158 
159 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
160 {
161  int i, ret;
163  AVDictionaryEntry *entry;
164  char *filename;
165  char *format = NULL, *select = NULL, *on_fail = NULL;
166  char *use_fifo = NULL, *fifo_options_str = NULL;
167  AVFormatContext *avf2 = NULL;
168  AVStream *st, *st2;
169  int stream_count;
170  int fullret;
171  char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
172 
173  if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
174  return ret;
175 
176 #define STEAL_OPTION(option, field) do { \
177  if ((entry = av_dict_get(options, option, NULL, 0))) { \
178  field = entry->value; \
179  entry->value = NULL; /* prevent it from being freed */ \
180  av_dict_set(&options, option, NULL, 0); \
181  } \
182  } while (0)
183 
184  STEAL_OPTION("f", format);
185  STEAL_OPTION("select", select);
186  STEAL_OPTION("onfail", on_fail);
187  STEAL_OPTION("use_fifo", use_fifo);
188  STEAL_OPTION("fifo_options", fifo_options_str);
189 
190  ret = parse_slave_failure_policy_option(on_fail, tee_slave);
191  if (ret < 0) {
192  av_log(avf, AV_LOG_ERROR,
193  "Invalid onfail option value, valid options are 'abort' and 'ignore'\n");
194  goto end;
195  }
196 
197  ret = parse_slave_fifo_options(use_fifo, fifo_options_str, tee_slave);
198  if (ret < 0) {
199  av_log(avf, AV_LOG_ERROR, "Error parsing fifo options: %s\n", av_err2str(ret));
200  goto end;
201  }
202 
203  if (tee_slave->use_fifo) {
204 
205  if (options) {
206  char *format_options_str = NULL;
207  ret = av_dict_get_string(options, &format_options_str, '=', ':');
208  if (ret < 0)
209  goto end;
210 
211  ret = av_dict_set(&tee_slave->fifo_options, "format_opts", format_options_str,
213  if (ret < 0)
214  goto end;
215  }
216 
217  if (format) {
218  ret = av_dict_set(&tee_slave->fifo_options, "fifo_format", format,
220  format = NULL;
221  if (ret < 0)
222  goto end;
223  }
224 
226  options = tee_slave->fifo_options;
227  }
229  tee_slave->use_fifo ? "fifo" :format, filename);
230  if (ret < 0)
231  goto end;
232  tee_slave->avf = avf2;
233  av_dict_copy(&avf2->metadata, avf->metadata, 0);
234  avf2->opaque = avf->opaque;
235  avf2->io_open = avf->io_open;
236  avf2->io_close = avf->io_close;
238  avf2->flags = avf->flags;
240 
241  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
242  if (!tee_slave->stream_map) {
243  ret = AVERROR(ENOMEM);
244  goto end;
245  }
246 
247  stream_count = 0;
248  for (i = 0; i < avf->nb_streams; i++) {
249  st = avf->streams[i];
250  if (select) {
251  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
252  if (!tmp_select) {
253  ret = AVERROR(ENOMEM);
254  goto end;
255  }
256  fullret = 0;
257  first_subselect = tmp_select;
258  next_subselect = NULL;
259  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
260  first_subselect = NULL;
261 
262  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
263  if (ret < 0) {
264  av_log(avf, AV_LOG_ERROR,
265  "Invalid stream specifier '%s' for output '%s'\n",
266  subselect, slave);
267  goto end;
268  }
269  if (ret != 0) {
270  fullret = 1; // match
271  break;
272  }
273  }
274  av_freep(&tmp_select);
275 
276  if (fullret == 0) { /* no match */
277  tee_slave->stream_map[i] = -1;
278  continue;
279  }
280  }
281  tee_slave->stream_map[i] = stream_count++;
282 
283  if (!(st2 = avformat_new_stream(avf2, NULL))) {
284  ret = AVERROR(ENOMEM);
285  goto end;
286  }
287 
289  if (ret < 0)
290  goto end;
291  }
292 
293  ret = ff_format_output_open(avf2, filename, NULL);
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(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
315  const char *spec = entry->key + strlen("bsfs");
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(&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);
400  av_free(on_fail);
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 (tee->fifo_options_str) {
472  ret = av_dict_parse_string(&tee->fifo_options, tee->fifo_options_str, "=", ":", 0);
473  if (ret < 0)
474  goto fail;
475  }
476 
477  if (!(tee->slaves = av_mallocz_array(nb_slaves, sizeof(*tee->slaves)))) {
478  ret = AVERROR(ENOMEM);
479  goto fail;
480  }
481  tee->nb_slaves = tee->nb_alive = nb_slaves;
482 
483  for (i = 0; i < nb_slaves; i++) {
484 
485  tee->slaves[i].use_fifo = tee->use_fifo;
486  ret = av_dict_copy(&tee->slaves[i].fifo_options, tee->fifo_options, 0);
487  if (ret < 0)
488  goto fail;
489 
490  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
492  if (ret < 0)
493  goto fail;
494  } else {
495  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
496  }
497  av_freep(&slaves[i]);
498  }
499 
500  for (i = 0; i < avf->nb_streams; i++) {
501  int j, mapped = 0;
502  for (j = 0; j < tee->nb_slaves; j++)
503  if (tee->slaves[j].avf)
504  mapped += tee->slaves[j].stream_map[i] >= 0;
505  if (!mapped)
506  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
507  "to any slave.\n", i);
508  }
509  av_free(slaves);
510  return 0;
511 
512 fail:
513  for (i = 0; i < nb_slaves; i++)
514  av_freep(&slaves[i]);
515  close_slaves(avf);
516  av_free(slaves);
517  return ret;
518 }
519 
521 {
522  TeeContext *tee = avf->priv_data;
523  int ret_all = 0, ret;
524  unsigned i;
525 
526  for (i = 0; i < tee->nb_slaves; i++) {
527  if ((ret = close_slave(&tee->slaves[i])) < 0) {
529  if (!ret_all && ret < 0)
530  ret_all = ret;
531  }
532  }
533  av_freep(&tee->slaves);
534  return ret_all;
535 }
536 
538 {
539  TeeContext *tee = avf->priv_data;
540  AVFormatContext *avf2;
541  AVBSFContext *bsfs;
542  AVPacket pkt2;
543  int ret_all = 0, ret;
544  unsigned i, s;
545  int s2;
546 
547  for (i = 0; i < tee->nb_slaves; i++) {
548  if (!(avf2 = tee->slaves[i].avf))
549  continue;
550 
551  /* Flush slave if pkt is NULL*/
552  if (!pkt) {
554  if (ret < 0) {
556  if (!ret_all && ret < 0)
557  ret_all = ret;
558  }
559  continue;
560  }
561 
562  s = pkt->stream_index;
563  s2 = tee->slaves[i].stream_map[s];
564  if (s2 < 0)
565  continue;
566 
567  memset(&pkt2, 0, sizeof(AVPacket));
568  if ((ret = av_packet_ref(&pkt2, pkt)) < 0)
569  if (!ret_all) {
570  ret_all = ret;
571  continue;
572  }
573  bsfs = tee->slaves[i].bsfs[s2];
574  pkt2.stream_index = s2;
575 
576  ret = av_bsf_send_packet(bsfs, &pkt2);
577  if (ret < 0) {
578  av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
579  av_err2str(ret));
581  if (!ret_all && ret < 0)
582  ret_all = ret;
583  }
584 
585  while(1) {
586  ret = av_bsf_receive_packet(bsfs, &pkt2);
587  if (ret == AVERROR(EAGAIN)) {
588  ret = 0;
589  break;
590  } else if (ret < 0) {
591  break;
592  }
593 
594  av_packet_rescale_ts(&pkt2, bsfs->time_base_out,
595  avf2->streams[s2]->time_base);
596  ret = av_interleaved_write_frame(avf2, &pkt2);
597  if (ret < 0)
598  break;
599  };
600 
601  if (ret < 0) {
603  if (!ret_all && ret < 0)
604  ret_all = ret;
605  }
606  }
607  return ret_all;
608 }
609 
611  .name = "tee",
612  .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
613  .priv_data_size = sizeof(TeeContext),
617  .priv_class = &tee_muxer_class,
619 };
AVBSFContext::par_in
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5791
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
ON_SLAVE_FAILURE_IGNORE
@ ON_SLAVE_FAILURE_IGNORE
Definition: tee.c:33
AVOutputFormat::name
const char * name
Definition: avformat.h:496
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4480
TeeSlave::bsfs
AVBSFContext ** bsfs
bitstream filters per stream
Definition: tee.c:40
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
TeeSlave::stream_map
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:48
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:149
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: utils.c:5655
AVBitStreamFilter::name
const char * name
Definition: avcodec.h:5813
av_strcasecmp
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
av_bsf_send_packet
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:186
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
AVFormatContext::strict_std_compliance
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1650
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:32
AVOption
AVOption.
Definition: opt.h:246
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:70
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
tee_write_trailer
static int tee_write_trailer(AVFormatContext *avf)
Definition: tee.c:520
AVDictionary
Definition: dict.c:30
tee_write_packet
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:537
TeeContext::use_fifo
int use_fifo
Definition: tee.c:57
TeeContext::nb_slaves
unsigned nb_slaves
Definition: tee.c:54
AVBSFContext
The bitstream filter state.
Definition: avcodec.h:5763
av_bsf_get_null_filter
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:565
ON_SLAVE_FAILURE_ABORT
@ ON_SLAVE_FAILURE_ABORT
Definition: tee.c:32
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:1620
fail
#define fail()
Definition: checkasm.h:120
AVERROR_OPTION_NOT_FOUND
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
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:74
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVFormatContext::metadata
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1582
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:40
s
#define s(width, name)
Definition: cbs_vp9.c:257
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:276
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:1473
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
AVDictionaryEntry::key
char * key
Definition: dict.h:82
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:184
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
TeeContext::slaves
TeeSlave * slaves
Definition: tee.c:56
AVBSFContext::time_base_in
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: avcodec.h:5803
TeeContext::fifo_options
AVDictionary * fifo_options
Definition: tee.c:58
slave_select_sep
static const char *const slave_select_sep
Definition: tee.c:64
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1183
av_bsf_free
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
AVFormatContext::opaque
void * opaque
User data.
Definition: avformat.h:1848
TeeContext::fifo_options_str
char * fifo_options_str
Definition: tee.c:59
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:508
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
parse_slave_fifo_options
static int parse_slave_fifo_options(const char *use_fifo, const char *fifo_options, TeeSlave *tee_slave)
Definition: tee.c:99
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1017
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
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:899
NULL
#define NULL
Definition: coverity.c:32
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
close_slave
static int close_slave(TeeSlave *tee_slave)
Definition: tee.c:122
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
TeeContext::nb_alive
unsigned nb_alive
Definition: tee.c:55
AVBitStreamFilter::priv_class
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: avcodec.h:5831
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:608
AVFormatContext::oformat
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1361
TeeSlave::on_fail
SlaveFailurePolicy on_fail
Definition: tee.c:42
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1398
s2
#define s2
Definition: regdef.h:39
TeeSlave
Definition: tee.c:38
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: utils.c:5291
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:188
ff_tee_muxer
AVOutputFormat ff_tee_muxer
Definition: tee.c:610
av_bsf_list_parse_str
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
Definition: bsf.c:527
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:119
AVFormatContext::url
char * url
input or output URL.
Definition: avformat.h:1438
AVFMT_ALLOW_FLUSH
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:476
close_slaves
static void close_slaves(AVFormatContext *avf)
Definition: tee.c:148
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:463
TeeSlave::fifo_options
AVDictionary * fifo_options
Definition: tee.c:44
DEFAULT_SLAVE_FAILURE_POLICY
#define DEFAULT_SLAVE_FAILURE_POLICY
Definition: tee.c:36
TeeContext
Definition: tee.c:52
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:203
avformat_alloc_output_context2
int avformat_alloc_output_context2(AVFormatContext **ctx, ff_const59 AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
options
static const AVOption options[]
Definition: tee.c:67
av_packet_rescale_ts
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
Definition: avpacket.c:704
TeeSlave::use_fifo
int use_fifo
Definition: tee.c:43
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:690
open_slave
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
Definition: tee.c:159
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:1254
AVOutputFormat
Definition: avformat.h:495
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
avio_internal.h
TeeSlave::header_written
int header_written
Definition: tee.c:49
AVBSFContext::time_base_out
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5809
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:870
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:72
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:294
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:76
ff_stream_encode_params_copy
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4293
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
SlaveFailurePolicy
SlaveFailurePolicy
Definition: tee.c:31
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:135
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
tee_write_header
static int tee_write_header(AVFormatContext *avf)
Definition: tee.c:448
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:344
avformat_free_context
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4414
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:180
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:1930
av_bsf_receive_packet
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:212
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:1924
slave_delim
static const char *const slave_delim
Definition: tee.c:62
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1479
AVBSFContext::filter
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5772
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5665
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
avutil.h
TeeSlave::avf
AVFormatContext * avf
Definition: tee.c:39
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry
Definition: dict.h:81
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1454
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:240
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:1192
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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:70
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:230
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:217
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVDictionaryEntry::value
char * value
Definition: dict.h:83
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:78
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:227
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1370
avcodec_parameters_copy
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2080