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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 #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 
44  /** map from input to output streams indexes,
45  * disabled output streams are set to -1 */
46  int *stream_map;
48 } TeeSlave;
49 
50 typedef struct TeeContext {
51  const AVClass *class;
52  unsigned nb_slaves;
53  unsigned nb_alive;
55 } TeeContext;
56 
57 static const char *const slave_delim = "|";
58 static const char *const slave_bsfs_spec_sep = "/";
59 static const char *const slave_select_sep = ",";
60 
61 static const AVClass tee_muxer_class = {
62  .class_name = "Tee muxer",
63  .item_name = av_default_item_name,
64  .version = LIBAVUTIL_VERSION_INT,
65 };
66 
67 static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
68 {
69  if (!opt) {
71  return 0;
72  } else if (!av_strcasecmp("abort", opt)) {
73  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
74  return 0;
75  } else if (!av_strcasecmp("ignore", opt)) {
76  tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
77  return 0;
78  }
79  /* Set failure behaviour to abort, so invalid option error will not be ignored */
80  tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
81  return AVERROR(EINVAL);
82 }
83 
84 static int close_slave(TeeSlave *tee_slave)
85 {
86  AVFormatContext *avf;
87  unsigned i;
88  int ret = 0;
89 
90  avf = tee_slave->avf;
91  if (!avf)
92  return 0;
93 
94  if (tee_slave->header_written)
95  ret = av_write_trailer(avf);
96 
97  if (tee_slave->bsfs) {
98  for (i = 0; i < avf->nb_streams; ++i)
99  av_bsf_free(&tee_slave->bsfs[i]);
100  }
101  av_freep(&tee_slave->stream_map);
102  av_freep(&tee_slave->bsfs);
103 
104  ff_format_io_close(avf, &avf->pb);
106  tee_slave->avf = NULL;
107  return ret;
108 }
109 
110 static void close_slaves(AVFormatContext *avf)
111 {
112  TeeContext *tee = avf->priv_data;
113  unsigned i;
114 
115  for (i = 0; i < tee->nb_slaves; i++) {
116  close_slave(&tee->slaves[i]);
117  }
118  av_freep(&tee->slaves);
119 }
120 
121 static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
122 {
123  int i, ret;
125  AVDictionaryEntry *entry;
126  char *filename;
127  char *format = NULL, *select = NULL, *on_fail = NULL;
128  AVFormatContext *avf2 = NULL;
129  AVStream *st, *st2;
130  int stream_count;
131  int fullret;
132  char *subselect = NULL, *next_subselect = NULL, *first_subselect = NULL, *tmp_select = NULL;
133 
134  if ((ret = ff_tee_parse_slave_options(avf, slave, &options, &filename)) < 0)
135  return ret;
136 
137 #define STEAL_OPTION(option, field) do { \
138  if ((entry = av_dict_get(options, option, NULL, 0))) { \
139  field = entry->value; \
140  entry->value = NULL; /* prevent it from being freed */ \
141  av_dict_set(&options, option, NULL, 0); \
142  } \
143  } while (0)
144 
145  STEAL_OPTION("f", format);
146  STEAL_OPTION("select", select);
147  STEAL_OPTION("onfail", on_fail);
148 
149  ret = parse_slave_failure_policy_option(on_fail, tee_slave);
150  if (ret < 0) {
151  av_log(avf, AV_LOG_ERROR,
152  "Invalid onfail option value, valid options are 'abort' and 'ignore'\n");
153  goto end;
154  }
155 
156  ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
157  if (ret < 0)
158  goto end;
159  tee_slave->avf = avf2;
160  av_dict_copy(&avf2->metadata, avf->metadata, 0);
161  avf2->opaque = avf->opaque;
162  avf2->io_open = avf->io_open;
163  avf2->io_close = avf->io_close;
164 
165  tee_slave->stream_map = av_calloc(avf->nb_streams, sizeof(*tee_slave->stream_map));
166  if (!tee_slave->stream_map) {
167  ret = AVERROR(ENOMEM);
168  goto end;
169  }
170 
171  stream_count = 0;
172  for (i = 0; i < avf->nb_streams; i++) {
173  st = avf->streams[i];
174  if (select) {
175  tmp_select = av_strdup(select); // av_strtok is destructive so we regenerate it in each loop
176  if (!tmp_select) {
177  ret = AVERROR(ENOMEM);
178  goto end;
179  }
180  fullret = 0;
181  first_subselect = tmp_select;
182  next_subselect = NULL;
183  while (subselect = av_strtok(first_subselect, slave_select_sep, &next_subselect)) {
184  first_subselect = NULL;
185 
186  ret = avformat_match_stream_specifier(avf, avf->streams[i], subselect);
187  if (ret < 0) {
188  av_log(avf, AV_LOG_ERROR,
189  "Invalid stream specifier '%s' for output '%s'\n",
190  subselect, slave);
191  goto end;
192  }
193  if (ret != 0) {
194  fullret = 1; // match
195  break;
196  }
197  }
198  av_freep(&tmp_select);
199 
200  if (fullret == 0) { /* no match */
201  tee_slave->stream_map[i] = -1;
202  continue;
203  }
204  }
205  tee_slave->stream_map[i] = stream_count++;
206 
207  if (!(st2 = avformat_new_stream(avf2, NULL))) {
208  ret = AVERROR(ENOMEM);
209  goto end;
210  }
211 
212  ret = ff_stream_encode_params_copy(st2, st);
213  if (ret < 0)
214  goto end;
215  }
216 
217  ret = ff_format_output_open(avf2, filename, NULL);
218  if (ret < 0) {
219  av_log(avf, AV_LOG_ERROR, "Slave '%s': error opening: %s\n", slave,
220  av_err2str(ret));
221  goto end;
222  }
223 
224  if ((ret = avformat_write_header(avf2, &options)) < 0) {
225  av_log(avf, AV_LOG_ERROR, "Slave '%s': error writing header: %s\n",
226  slave, av_err2str(ret));
227  goto end;
228  }
229  tee_slave->header_written = 1;
230 
231  tee_slave->bsfs = av_calloc(avf2->nb_streams, sizeof(*tee_slave->bsfs));
232  if (!tee_slave->bsfs) {
233  ret = AVERROR(ENOMEM);
234  goto end;
235  }
236 
237  entry = NULL;
238  while (entry = av_dict_get(options, "bsfs", NULL, AV_DICT_IGNORE_SUFFIX)) {
239  const char *spec = entry->key + strlen("bsfs");
240  if (*spec) {
241  if (strspn(spec, slave_bsfs_spec_sep) != 1) {
242  av_log(avf, AV_LOG_ERROR,
243  "Specifier separator in '%s' is '%c', but only characters '%s' "
244  "are allowed\n", entry->key, *spec, slave_bsfs_spec_sep);
245  ret = AVERROR(EINVAL);
246  goto end;
247  }
248  spec++; /* consume separator */
249  }
250 
251  for (i = 0; i < avf2->nb_streams; i++) {
252  ret = avformat_match_stream_specifier(avf2, avf2->streams[i], spec);
253  if (ret < 0) {
254  av_log(avf, AV_LOG_ERROR,
255  "Invalid stream specifier '%s' in bsfs option '%s' for slave "
256  "output '%s'\n", spec, entry->key, filename);
257  goto end;
258  }
259 
260  if (ret > 0) {
261  av_log(avf, AV_LOG_DEBUG, "spec:%s bsfs:%s matches stream %d of slave "
262  "output '%s'\n", spec, entry->value, i, filename);
263  if (tee_slave->bsfs[i]) {
264  av_log(avf, AV_LOG_WARNING,
265  "Duplicate bsfs specification associated to stream %d of slave "
266  "output '%s', filters will be ignored\n", i, filename);
267  continue;
268  }
269  ret = av_bsf_list_parse_str(entry->value, &tee_slave->bsfs[i]);
270  if (ret < 0) {
271  av_log(avf, AV_LOG_ERROR,
272  "Error parsing bitstream filter sequence '%s' associated to "
273  "stream %d of slave output '%s'\n", entry->value, i, filename);
274  goto end;
275  }
276  }
277  }
278 
279  av_dict_set(&options, entry->key, NULL, 0);
280  }
281 
282  for (i = 0; i < avf->nb_streams; i++){
283  int target_stream = tee_slave->stream_map[i];
284  if (target_stream < 0)
285  continue;
286 
287  if (!tee_slave->bsfs[target_stream]) {
288  /* Add pass-through bitstream filter */
289  ret = av_bsf_get_null_filter(&tee_slave->bsfs[target_stream]);
290  if (ret < 0) {
291  av_log(avf, AV_LOG_ERROR,
292  "Failed to create pass-through bitstream filter: %s\n",
293  av_err2str(ret));
294  goto end;
295  }
296  }
297 
298  tee_slave->bsfs[target_stream]->time_base_in = avf->streams[i]->time_base;
299  ret = avcodec_parameters_copy(tee_slave->bsfs[target_stream]->par_in,
300  avf->streams[i]->codecpar);
301  if (ret < 0)
302  goto end;
303 
304  ret = av_bsf_init(tee_slave->bsfs[target_stream]);
305  if (ret < 0) {
306  av_log(avf, AV_LOG_ERROR,
307  "Failed to initialize bitstream filter(s): %s\n",
308  av_err2str(ret));
309  goto end;
310  }
311  }
312 
313  if (options) {
314  entry = NULL;
315  while ((entry = av_dict_get(options, "", entry, AV_DICT_IGNORE_SUFFIX)))
316  av_log(avf2, AV_LOG_ERROR, "Unknown option '%s'\n", entry->key);
318  goto end;
319  }
320 
321 end:
322  av_free(format);
323  av_free(select);
324  av_free(on_fail);
325  av_dict_free(&options);
326  av_freep(&tmp_select);
327  return ret;
328 }
329 
330 static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
331 {
332  int i;
333  av_log(log_ctx, log_level, "filename:'%s' format:%s\n",
334  slave->avf->filename, slave->avf->oformat->name);
335  for (i = 0; i < slave->avf->nb_streams; i++) {
336  AVStream *st = slave->avf->streams[i];
337  AVBSFContext *bsf = slave->bsfs[i];
338  const char *bsf_name;
339 
340  av_log(log_ctx, log_level, " stream:%d codec:%s type:%s",
343 
344  bsf_name = bsf->filter->priv_class ?
345  bsf->filter->priv_class->item_name(bsf) : bsf->filter->name;
346  av_log(log_ctx, log_level, " bsfs: %s\n", bsf_name);
347  }
348 }
349 
350 static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
351 {
352  TeeContext *tee = avf->priv_data;
353  TeeSlave *tee_slave = &tee->slaves[slave_idx];
354 
355  tee->nb_alive--;
356 
357  close_slave(tee_slave);
358 
359  if (!tee->nb_alive) {
360  av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
361  return err_n;
362  } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
363  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n", slave_idx);
364  return err_n;
365  } else {
366  av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed: %s, continuing with %u/%u slaves.\n",
367  slave_idx, av_err2str(err_n), tee->nb_alive, tee->nb_slaves);
368  return 0;
369  }
370 }
371 
373 {
374  TeeContext *tee = avf->priv_data;
375  unsigned nb_slaves = 0, i;
376  const char *filename = avf->filename;
377  char **slaves = NULL;
378  int ret;
379 
380  while (*filename) {
381  char *slave = av_get_token(&filename, slave_delim);
382  if (!slave) {
383  ret = AVERROR(ENOMEM);
384  goto fail;
385  }
386  ret = av_dynarray_add_nofree(&slaves, &nb_slaves, slave);
387  if (ret < 0) {
388  av_free(slave);
389  goto fail;
390  }
391  if (strspn(filename, slave_delim))
392  filename++;
393  }
394 
395  if (!(tee->slaves = av_mallocz_array(nb_slaves, sizeof(*tee->slaves)))) {
396  ret = AVERROR(ENOMEM);
397  goto fail;
398  }
399  tee->nb_slaves = tee->nb_alive = nb_slaves;
400 
401  for (i = 0; i < nb_slaves; i++) {
402  if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
403  ret = tee_process_slave_failure(avf, i, ret);
404  if (ret < 0)
405  goto fail;
406  } else {
407  log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
408  }
409  av_freep(&slaves[i]);
410  }
411 
412  for (i = 0; i < avf->nb_streams; i++) {
413  int j, mapped = 0;
414  for (j = 0; j < tee->nb_slaves; j++)
415  if (tee->slaves[j].avf)
416  mapped += tee->slaves[j].stream_map[i] >= 0;
417  if (!mapped)
418  av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
419  "to any slave.\n", i);
420  }
421  av_free(slaves);
422  return 0;
423 
424 fail:
425  for (i = 0; i < nb_slaves; i++)
426  av_freep(&slaves[i]);
427  close_slaves(avf);
428  av_free(slaves);
429  return ret;
430 }
431 
433 {
434  TeeContext *tee = avf->priv_data;
435  int ret_all = 0, ret;
436  unsigned i;
437 
438  for (i = 0; i < tee->nb_slaves; i++) {
439  if ((ret = close_slave(&tee->slaves[i])) < 0) {
440  ret = tee_process_slave_failure(avf, i, ret);
441  if (!ret_all && ret < 0)
442  ret_all = ret;
443  }
444  }
445  av_freep(&tee->slaves);
446  return ret_all;
447 }
448 
450 {
451  TeeContext *tee = avf->priv_data;
452  AVFormatContext *avf2;
453  AVBSFContext *bsfs;
454  AVPacket pkt2;
455  int ret_all = 0, ret;
456  unsigned i, s;
457  int s2;
458 
459  for (i = 0; i < tee->nb_slaves; i++) {
460  if (!(avf2 = tee->slaves[i].avf))
461  continue;
462 
463  /* Flush slave if pkt is NULL*/
464  if (!pkt) {
465  ret = av_interleaved_write_frame(avf2, NULL);
466  if (ret < 0) {
467  ret = tee_process_slave_failure(avf, i, ret);
468  if (!ret_all && ret < 0)
469  ret_all = ret;
470  }
471  continue;
472  }
473 
474  s = pkt->stream_index;
475  s2 = tee->slaves[i].stream_map[s];
476  if (s2 < 0)
477  continue;
478 
479  memset(&pkt2, 0, sizeof(AVPacket));
480  if ((ret = av_packet_ref(&pkt2, pkt)) < 0)
481  if (!ret_all) {
482  ret_all = ret;
483  continue;
484  }
485  bsfs = tee->slaves[i].bsfs[s2];
486  pkt2.stream_index = s2;
487 
488  ret = av_bsf_send_packet(bsfs, &pkt2);
489  if (ret < 0) {
490  av_log(avf, AV_LOG_ERROR, "Error while sending packet to bitstream filter: %s\n",
491  av_err2str(ret));
492  ret = tee_process_slave_failure(avf, i, ret);
493  if (!ret_all && ret < 0)
494  ret_all = ret;
495  }
496 
497  while(1) {
498  ret = av_bsf_receive_packet(bsfs, &pkt2);
499  if (ret == AVERROR(EAGAIN)) {
500  ret = 0;
501  break;
502  } else if (ret < 0) {
503  break;
504  }
505 
506  av_packet_rescale_ts(&pkt2, bsfs->time_base_out,
507  avf2->streams[s2]->time_base);
508  ret = av_interleaved_write_frame(avf2, &pkt2);
509  if (ret < 0)
510  break;
511  };
512 
513  if (ret < 0) {
514  ret = tee_process_slave_failure(avf, i, ret);
515  if (!ret_all && ret < 0)
516  ret_all = ret;
517  }
518  }
519  return ret_all;
520 }
521 
523  .name = "tee",
524  .long_name = NULL_IF_CONFIG_SMALL("Multiple muxer tee"),
525  .priv_data_size = sizeof(TeeContext),
529  .priv_class = &tee_muxer_class,
531 };
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:36
#define NULL
Definition: coverity.c:32
static int tee_write_packet(AVFormatContext *avf, AVPacket *pkt)
Definition: tee.c:449
const char * s
Definition: avisynth_c.h:768
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions. ...
Definition: avcodec.h:5792
SlaveFailurePolicy
Definition: tee.c:31
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file ensuring correct interleaving.
Definition: mux.c:1189
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
TeeSlave * slaves
Definition: tee.c:54
static int tee_write_trailer(AVFormatContext *avf)
Definition: tee.c:432
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3969
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5736
The bitstream filter state.
Definition: avcodec.h:5727
static const char *const slave_bsfs_spec_sep
Definition: tee.c:58
Convenience header that includes libavutil's core.
static void log_slave(TeeSlave *slave, void *log_ctx, int log_level)
Definition: tee.c:330
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static AVPacket pkt
int header_written
Definition: tee.c:47
SlaveFailurePolicy on_fail
Definition: tee.c:42
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
Definition: bsf.c:540
#define AVFMT_ALLOW_FLUSH
Format allows flushing.
Definition: avformat.h:495
static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx, int err_n)
Definition: tee.c:350
static const char *const slave_delim
Definition: tee.c:57
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
Definition: bsf.c:135
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:260
Format I/O context.
Definition: avformat.h:1330
static void write_packet(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
Definition: ffmpeg.c:635
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
Definition: bsf.c:199
AVOutputFormat ff_tee_muxer
Definition: tee.c:522
static int close_slave(TeeSlave *tee_slave)
Definition: tee.c:84
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5244
static void close_slaves(AVFormatContext *avf)
Definition: tee.c:110
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:4769
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4182
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1398
const char * name
Definition: avcodec.h:5774
unsigned nb_alive
Definition: tee.c:53
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
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5234
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4005
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:310
const OptionDef options[]
Definition: ffserver.c:3969
static int open_slave(AVFormatContext *avf, char *slave, TeeSlave *tee_slave)
Definition: tee.c:121
#define av_log(a,...)
static const char *const slave_select_sep
Definition: tee.c:59
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1349
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
Definition: avpacket.c:576
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
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4086
#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:1546
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:630
#define s2
Definition: regdef.h:39
av_default_item_name
#define DEFAULT_SLAVE_FAILURE_POLICY
Definition: tee.c:36
#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
AVBSFContext ** bsfs
bitstream filters per stream
Definition: tee.c:40
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
unsigned nb_slaves
Definition: tee.c:52
int * stream_map
map from input to output streams indexes, disabled output streams are set to -1
Definition: tee.c:46
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3965
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: avcodec.h:5764
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:226
#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:1812
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1386
Definition: tee.c:38
char filename[1024]
input or output filename
Definition: avformat.h:1406
int ff_tee_parse_slave_options(void *log, char *slave, AVDictionary **options, char **filename)
Definition: tee_common.c:32
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:61
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5770
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
Definition: bsf.c:176
const char * name
Definition: avformat.h:524
#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 *(* 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
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:3098
Stream structure.
Definition: avformat.h:881
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:267
Definition: tee.c:50
AVIOContext * pb
I/O context.
Definition: avformat.h:1372
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
static const char * format
Definition: movenc.c:47
Describe the class of an AVClass context structure.
Definition: log.h:67
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4118
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.
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:504
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
char * key
Definition: dict.h:86
#define av_free(p)
#define AVERROR_OPTION_NOT_FOUND
Option not found.
Definition: error.h:61
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1358
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:344
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1251
#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:1233
int stream_index
Definition: avcodec.h:1602
static int parse_slave_failure_policy_option(const char *opt, TeeSlave *tee_slave)
Definition: tee.c:67
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:918
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1890
This structure stores compressed data.
Definition: avcodec.h:1577
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5753
AVFormatContext * avf
Definition: tee.c:39
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1896
static int tee_write_header(AVFormatContext *avf)
Definition: tee.c:372
#define STEAL_OPTION(option, field)