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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 
30 typedef enum {
34 
35 #define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
36 
37 typedef struct {
39  AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
40 
42 
43  /** map from input to output streams indexes,
44  * disabled output streams are set to -1 */
45  int *stream_map;
47 } TeeSlave;
48 
49 typedef struct TeeContext {
50  const AVClass *class;
51  unsigned nb_slaves;
52  unsigned nb_alive;
54 } TeeContext;
55 
56 static const char *const slave_delim = "|";
57 static const char *const slave_opt_open = "[";
58 static const char *const slave_opt_close = "]";
59 static const char *const slave_opt_delim = ":]"; /* must have the close too */
60 static const char *const slave_bsfs_spec_sep = "/";
61 static const char *const slave_select_sep = ",";
62 
63 static const AVClass tee_muxer_class = {
64  .class_name = "Tee muxer",
65  .item_name = av_default_item_name,
66  .version = LIBAVUTIL_VERSION_INT,
67 };
68 
69 static int parse_slave_options(void *log, char *slave,
70  AVDictionary **options, char **filename)
71 {
72  const char *p;
73  char *key, *val;
74  int ret;
75 
76  if (!strspn(slave, slave_opt_open)) {
77  *filename = slave;
78  return 0;
79  }
80  p = slave + 1;
81  if (strspn(p, slave_opt_close)) {
82  *filename = (char *)p + 1;
83  return 0;
84  }
85  while (1) {
86  ret = av_opt_get_key_value(&p, "=", slave_opt_delim, 0, &key, &val);
87  if (ret < 0) {
88  av_log(log, AV_LOG_ERROR, "No option found near \"%s\"\n", p);
89  goto fail;
90  }
91  ret = av_dict_set(options, key, val,
93  if (ret < 0)
94  goto fail;
95  if (strspn(p, slave_opt_close))
96  break;
97  p++;
98  }
99  *filename = (char *)p + 1;
100  return 0;
101 
102 fail:
103  av_dict_free(options);
104  return ret;
105 }
106 
107 /**
108  * Parse list of bitstream filters and add them to the list of filters
109  * pointed to by bsfs.
110  *
111  * The list must be specified in the form:
112  * BSFS ::= BSF[,BSFS]
113  */
114 static int parse_bsfs(void *log_ctx, const char *bsfs_spec,
116 {
117  char *bsf_name, *buf, *dup, *saveptr;
118  int ret = 0;
119 
120  if (!(dup = buf = av_strdup(bsfs_spec)))
121  return AVERROR(ENOMEM);
122 
123  while (bsf_name = av_strtok(buf, ",", &saveptr)) {
125 
126  if (!bsf) {
127  av_log(log_ctx, AV_LOG_ERROR,
128  "Cannot initialize bitstream filter with name '%s', "
129  "unknown filter or internal error happened\n",
130  bsf_name);
131  ret = AVERROR_UNKNOWN;
132  goto end;
133  }
134 
135  /* append bsf context to the list of bsf contexts */
136  *bsfs = bsf;
137  bsfs = &bsf->next;
138 
139  buf = NULL;
140  }
141 
142 end:
143  av_free(dup);
144  return ret;
145 }
146 
147 static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
148 {
149  if (!opt) {
151  return 0;
152  } else if (!av_strcasecmp("abort", opt)) {
153  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
154  return 0;
155  } else if (!av_strcasecmp("ignore", opt)) {
156  tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
157  return 0;
158  }
159  /* Set failure behaviour to abort, so invalid option error will not be ignored */
160  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
161  return AVERROR(EINVAL);
162 }
163 
164 static int close_slave(TeeSlave *tee_slave)
165 {
166  AVFormatContext *avf;
167  unsigned i;
168  int ret = 0;
169 
170  avf = tee_slave->avf;
171  if (!avf)
172  return 0;
173 
174  if (tee_slave->header_written)
175  ret = av_write_trailer(avf);
176 
177  if (tee_slave->bsfs) {
178  for (i = 0; i < avf->nb_streams; ++i) {
179  AVBitStreamFilterContext *bsf_next, *bsf = tee_slave->bsfs[i];
180  while (bsf) {
181  bsf_next = bsf->next;
183  bsf = bsf_next;
184  }
185  }
186  }
187  av_freep(&tee_slave->stream_map);
188  av_freep(&tee_slave->bsfs);
189 
190  ff_format_io_close(avf, &avf->pb);
192  tee_slave->avf = NULL;
193  return ret;
194 }
195 
196 static void close_slaves(AVFormatContext *avf)
197 {
198  TeeContext *tee = avf->priv_data;
199  unsigned i;
200 
201  for (i = 0; i < tee->nb_slaves; i++) {
202  close_slave(&tee->slaves[i]);
203  }
204  av_freep(&tee->slaves);
205 }
206 
207 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
208 {
209  int i, ret;
211  AVDictionaryEntry *entry;
212  char *filename;
213  char *format = NULL, *select = NULL, *on_fail = NULL;
214  AVFormatContext *avf2 = NULL;
215  AVStream *st, *st2;
216  int stream_count;
217  int fullret;
218  char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
219 
220  if ((ret = parse_slave_options(avf, slave, &options, &filename)) < 0)
221  return ret;
222 
223 #define STEAL_OPTION(option, field) do { \
224  if ((entry = av_dict_get(options, option, NULL, 0))) { \
225  field = entry->value; \
226  entry->value = NULL; /* prevent it from being freed */ \
227  av_dict_set(&options, option, NULL, 0); \
228  } \
229  } while (0)
230 
231  STEAL_OPTION("f", format);
232  STEAL_OPTION("select", select);
233  STEAL_OPTION("onfail", on_fail);
234 
235  ret = parse_slave_failure_policy_option(on_fail, tee_slave);
236  if (ret < 0) {
237  av_log(avf, AV_LOG_ERROR,
238  "Invalid onfail option value, valid options are 'abort' and 'ignore'\n");
239  goto end;
240  }
241 
242  ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
243  if (ret < 0)
244  goto end;
245  tee_slave->avf = avf2;
246  av_dict_copy(&avf2->metadata, avf->metadata, 0);
247  avf2->opaque = avf->opaque;
248  avf2->io_open = avf->io_open;
249  avf2->io_close = avf->io_close;
250 
251  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
252  if (!tee_slave->stream_map) {
253  ret = AVERROR(ENOMEM);
254  goto end;
255  }
256 
257  stream_count = 0;
258  for (i = 0; i < avf->nb_streams; i++) {
259  st = avf->streams[i];
260  if (select) {
261  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
262  if (!tmp_select) {
263  ret = AVERROR(ENOMEM);
264  goto end;
265  }
266  fullret = 0;
267  first_subselect = tmp_select;
268  next_subselect = NULL;
269  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
270  first_subselect = NULL;
271 
272  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
273  if (ret < 0) {
274  av_log(avf, AV_LOG_ERROR,
275  "Invalid stream specifier '%s' for output '%s'\n",
276  subselect, slave);
277  goto end;
278  }
279  if (ret != 0) {
280  fullret = 1; // match
281  break;
282  }
283  }
284  av_freep(&tmp_select);
285 
286  if (fullret == 0) { /* no match */
287  tee_slave->stream_map[i] = -1;
288  continue;
289  }
290  }
291  tee_slave->stream_map[i] = stream_count++;
292 
293  if (!(st2 = avformat_new_stream(avf2, NULL))) {
294  ret = AVERROR(ENOMEM);
295  goto end;
296  }
297 
298  ret = ff_stream_encode_params_copy(st2, st);
299  if (ret < 0)
300  goto end;
301  }
302 
303  ret = ff_format_output_open(avf2, filename, NULL);
304  if (ret < 0) {
305  av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
306  av_err2str(ret));
307  goto end;
308  }
309 
310  if ((ret = avformat_write_header(avf2, &options)) < 0) {
311  av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
312  slave, av_err2str(ret));
313  goto end;
314  }
315  tee_slave->header_written = 1;
316 
317  tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
318  if (!tee_slave->bsfs) {
319  ret = AVERROR(ENOMEM);
320  goto end;
321  }
322 
323  entry = NULL;
324  while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
325  const char *spec = entry->key + strlen("bsfs");
326  if (*spec) {
327  if (strspn(spec, slave_bsfs_spec_sep) != 1) {
328  av_log(avf, AV_LOG_ERROR,
329  "Specifier separator in '%s' is '%c', but only characters '%s' "
330  "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
331  ret = AVERROR(EINVAL);
332  goto end;
333  }
334  spec++; /* consume separator */
335  }
336 
337  for (i = 0; i < avf2->nb_streams; i++) {
338  ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
339  if (ret < 0) {
340  av_log(avf, AV_LOG_ERROR,
341  "Invalid stream specifier '%s' in bsfs option '%s' for slave "
342  "output '%s'\n", spec, entry->key, filename);
343  goto end;
344  }
345 
346  if (ret > 0) {
347  av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
348  "output '%s'\n", spec, entry->value, i, filename);
349  if (tee_slave->bsfs[i]) {
350  av_log(avf, AV_LOG_WARNING,
351  "Duplicate bsfs specification associated to stream %d of slave "
352  "output '%s', filters will be ignored\n", i, filename);
353  continue;
354  }
355  ret = parse_bsfs(avf, entry->value, &tee_slave->bsfs[i]);
356  if (ret < 0) {
357  av_log(avf, AV_LOG_ERROR,
358  "Error parsing bitstream filter sequence '%s' associated to "
359  "stream %d of slave output '%s'\n", entry->value, i, filename);
360  goto end;
361  }
362  }
363  }
364 
365  av_dict_set(&options, entry->key, NULL, 0);
366  }
367 
368  if (options) {
369  entry = NULL;
370  while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
371  av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
373  goto end;
374  }
375 
376 end:
377  av_free(format);
378  av_free(select);
379  av_free(on_fail);
380  av_dict_free(&options);
381  av_freep(&tmp_select);
382  return ret;
383 }
384 
385 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
386 {
387  int i;
388  av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
389  slave->avf->filename, slave->avf->oformat->name);
390  for (i = 0; i < slave->avf->nb_streams; i++) {
391  AVStream *st = slave->avf->streams[i];
392  AVBitStreamFilterContext *bsf = slave->bsfs[i];
393 
394  av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
397  if (bsf) {
398  av_log(log_ctx, log_level, " bsfs:");
399  while (bsf) {
400  av_log(log_ctx, log_level, "%s%s",
401  bsf->filter->name, bsf->next ? "," : "");
402  bsf = bsf->next;
403  }
404  }
405  av_log(log_ctx, log_level, "\n");
406  }
407 }
408 
409 static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
410 {
411  TeeContext *tee = avf->priv_data;
412  TeeSlave *tee_slave = &tee->slaves[slave_idx];
413 
414  tee->nb_alive--;
415 
416  close_slave(tee_slave);
417 
418  if (!tee->nb_alive) {
419  av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
420  return err_n;
421  } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
422  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
423  return err_n;
424  } else {
425  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
426  slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
427  return 0;
428  }
429 }
430 
432 {
433  TeeContext *tee = avf->priv_data;
434  unsigned nb_slaves = 0, i;
435  const char *filename = avf->filename;
436  char **slaves = NULL;
437  int ret;
438 
439  while (*filename) {
440  char *slave = av_get_token(&filename, slave_delim);
441  if (!slave) {
442  ret = AVERROR(ENOMEM);
443  goto fail;
444  }
445  ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
446  if (ret < 0) {
447  av_free(slave);
448  goto fail;
449  }
450  if (strspn(filename, slave_delim))
451  filename++;
452  }
453 
454  if (!(tee->slaves = av_mallocz_array(nb_slaves, sizeof(*tee->slaves)))) {
455  ret = AVERROR(ENOMEM);
456  goto fail;
457  }
458  tee->nb_slaves = tee->nb_alive = nb_slaves;
459 
460  for (i = 0; i < nb_slaves; i++) {
461  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
462  ret = tee_process_slave_failure(avf, i, ret);
463  if (ret < 0)
464  goto fail;
465  } else {
466  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
467  }
468  av_freep(&slaves[i]);
469  }
470 
471  for (i = 0; i < avf->nb_streams; i++) {
472  int j, mapped = 0;
473  for (j = 0; j < tee->nb_slaves; j++)
474  if (tee->slaves[j].avf)
475  mapped += tee->slaves[j].stream_map[i] >= 0;
476  if (!mapped)
477  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
478  "to any slave.\n", i);
479  }
480  av_free(slaves);
481  return 0;
482 
483 fail:
484  for (i = 0; i < nb_slaves; i++)
485  av_freep(&slaves[i]);
486  close_slaves(avf);
487  av_free(slaves);
488  return ret;
489 }
490 
492 {
493  TeeContext *tee = avf->priv_data;
494  int ret_all = 0, ret;
495  unsigned i;
496 
497  for (i = 0; i < tee->nb_slaves; i++) {
498  if ((ret = close_slave(&tee->slaves[i])) < 0) {
499  ret = tee_process_slave_failure(avf, i, ret);
500  if (!ret_all && ret < 0)
501  ret_all = ret;
502  }
503  }
504  av_freep(&tee->slaves);
505  return ret_all;
506 }
507 
509 {
510  TeeContext *tee = avf->priv_data;
511  AVFormatContext *avf2;
512  AVPacket pkt2;
513  int ret_all = 0, ret;
514  unsigned i, s;
515  int s2;
516  AVRational tb, tb2;
517 
518  for (i = 0; i < tee->nb_slaves; i++) {
519  if (!(avf2 = tee->slaves[i].avf))
520  continue;
521 
522  /* Flush slave if pkt is NULL*/
523  if (!pkt) {
524  ret = av_interleaved_write_frame(avf2, NULL);
525  if (ret < 0) {
526  ret = tee_process_slave_failure(avf, i, ret);
527  if (!ret_all && ret < 0)
528  ret_all = ret;
529  }
530  continue;
531  }
532 
533  s = pkt->stream_index;
534  s2 = tee->slaves[i].stream_map[s];
535  if (s2 < 0)
536  continue;
537 
538  memset(&pkt2, 0, sizeof(AVPacket));
539  if ((ret = av_packet_ref(&pkt2, pkt)) < 0)
540  if (!ret_all) {
541  ret_all = ret;
542  continue;
543  }
544  tb = avf ->streams[s ]->time_base;
545  tb2 = avf2->streams[s2]->time_base;
546  av_packet_rescale_ts(&pkt2, tb, tb2);
547  pkt2.stream_index = s2;
548 
549  if ((ret = av_apply_bitstream_filters(avf2->streams[s2]->codec, &pkt2,
550  tee->slaves[i].bsfs[s2])) < 0 ||
551  (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0) {
552  ret = tee_process_slave_failure(avf, i, ret);
553  if (!ret_all && ret < 0)
554  ret_all = ret;
555  }
556  }
557  return ret_all;
558 }
559 
561  .name = "tee",
562  .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
563  .priv_data_size = sizeof(TeeContext),
567  .priv_class = &tee_muxer_class,
569 };
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:508
const char * s
Definition: avisynth_c.h:631
SlaveFailurePolicy
Definition: tee.c:30
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1138
AVBitStreamFilterContext ** bsfs
bitstream filters per stream
Definition: tee.c:39
static const char *const slave_opt_delim
Definition: tee.c:59
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
TeeSlave * slaves
Definition: tee.c:53
static int tee_write_trailer(AVFormatContext *avf)
Definition: tee.c:491
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3939
static const char *const slave_bsfs_spec_sep
Definition: tee.c:60
external API header
static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
Definition: tee.c:385
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:216
static AVPacket pkt
int header_written
Definition: tee.c:46
SlaveFailurePolicy on_fail
Definition: tee.c:41
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:493
static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
Definition: tee.c:409
static const char *const slave_delim
Definition: tee.c:56
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that's been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:73
static const char *const slave_opt_close
Definition: tee.c:58
Format I/O context.
Definition: avformat.h:1325
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
AVOutputFormat ff_tee_muxer
Definition: tee.c:560
static int close_slave(TeeSlave *tee_slave)
Definition: tee.c:164
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5182
static void close_slaves(AVFormatContext *avf)
Definition: tee.c:196
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:4712
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4131
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
const char * name
Definition: avcodec.h:5741
unsigned nb_alive
Definition: tee.c:52
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:39
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5172
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:3954
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
const OptionDef options[]
Definition: ffserver.c:3969
struct AVBitStreamFilterContext * next
Definition: avcodec.h:5673
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
Definition: tee.c:207
#define av_log(a,...)
static int parse_slave_options(void *log, char *slave, AVDictionary **options, char **filename)
Definition: tee.c:69
static const char *const slave_select_sep
Definition: tee.c:61
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1344
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:572
int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
Allocate an AVFormatContext for an output format.
Definition: mux.c:148
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1539
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:625
#define s2
Definition: regdef.h:39
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:310
av_default_item_name
#define DEFAULT_SLAVE_FAILURE_POLICY
Definition: tee.c:35
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned nb_slaves
Definition: tee.c:51
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:45
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
attribute_deprecated AVBitStreamFilterContext * av_bitstream_filter_init(const char *name)
Create and initialize a bitstream filter context given a bitstream filter name.
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
#define fail()
Definition: checkasm.h:82
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
void * opaque
User data.
Definition: avformat.h:1805
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
Definition: tee.c:37
char filename[1024]
input or output filename
Definition: avformat.h:1401
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:496
static const AVClass tee_muxer_class
Definition: tee.c:63
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
#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:76
attribute_deprecated void av_bitstream_filter_close(AVBitStreamFilterContext *bsf)
Release bitstream filter context.
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
const char * name
Definition: avformat.h:522
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:3082
Stream structure.
Definition: avformat.h:876
Definition: tee.c:49
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
static const char *const slave_opt_open
Definition: tee.c:57
void * buf
Definition: avisynth_c.h:553
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:69
struct AVBitStreamFilter * filter
Definition: avcodec.h:5671
static const char * format
Definition: movenc.c:47
Describe the class of an AVClass context structure.
Definition: log.h:67
rational number numerator/denominator
Definition: rational.h:43
static int parse_bsfs(void *log_ctx, const char *bsfs_spec, AVBitStreamFilterContext **bsfs)
Parse list of bitstream filters and add them to the list of filters pointed to by bsfs...
Definition: tee.c:114
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4067
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
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:79
static int flags
Definition: cpu.c:47
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
Main libavformat public API header.
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:476
char * key
Definition: dict.h:86
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define av_free(p)
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
char * value
Definition: dict.h:87
int av_opt_get_key_value(const char **ropts, const char *key_val_sep, const char *pairs_sep, unsigned flags, char **rkey, char **rval)
Extract a key-value pair from the beginning of a string.
Definition: opt.c:1442
void * priv_data
Format private data.
Definition: avformat.h:1353
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:498
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1200
#define av_freep(p)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVCodecParameters * codecpar
Definition: avformat.h:1228
int stream_index
Definition: avcodec.h:1590
static int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
Definition: tee.c:147
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1883
This structure stores compressed data.
Definition: avcodec.h:1565
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
AVFormatContext * avf
Definition: tee.c:38
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1889
static int tee_write_header(AVFormatContext *avf)
Definition: tee.c:431
#define STEAL_OPTION(option, field)
#define tb
Definition: regdef.h:68