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dashenc.c
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1 /*
2  * MPEG-DASH ISO BMFF segmenter
3  * Copyright (c) 2014 Martin Storsjo
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
9  * License 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 GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "config.h"
23 #if HAVE_UNISTD_H
24 #include <unistd.h>
25 #endif
26 
27 #include "libavutil/avassert.h"
28 #include "libavutil/avstring.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/rational.h"
34 
35 #include "avc.h"
36 #include "avformat.h"
37 #include "avio_internal.h"
38 #include "internal.h"
39 #include "isom.h"
40 #include "os_support.h"
41 #include "url.h"
42 
43 // See ISO/IEC 23009-1:2014 5.3.9.4.4
44 typedef enum {
51 } DASHTmplId;
52 
53 typedef struct Segment {
54  char file[1024];
55  int64_t start_pos;
57  int64_t time;
58  int duration;
59  int n;
60 } Segment;
61 
62 typedef struct OutputStream {
65  uint8_t iobuf[32768];
68  char initfile[1024];
69  int64_t init_start_pos;
74  int64_t last_dts;
75  int bit_rate;
76  char bandwidth_str[64];
77 
78  char codec_str[100];
79 } OutputStream;
80 
81 typedef struct DASHContext {
82  const AVClass *class; /* Class for private options. */
92  int64_t last_duration;
93  int64_t total_duration;
95  char dirname[1024];
96  const char *single_file_name;
97  const char *init_seg_name;
98  const char *media_seg_name;
101 } DASHContext;
102 
103 static int dash_write(void *opaque, uint8_t *buf, int buf_size)
104 {
105  OutputStream *os = opaque;
106  if (os->out)
107  avio_write(os->out, buf, buf_size);
108  return buf_size;
109 }
110 
111 // RFC 6381
113  char *str, int size)
114 {
115  const AVCodecTag *tags[2] = { NULL, NULL };
116  uint32_t tag;
117  if (par->codec_type == AVMEDIA_TYPE_VIDEO)
118  tags[0] = ff_codec_movvideo_tags;
119  else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
120  tags[0] = ff_codec_movaudio_tags;
121  else
122  return;
123 
124  tag = av_codec_get_tag(tags, par->codec_id);
125  if (!tag)
126  return;
127  if (size < 5)
128  return;
129 
130  AV_WL32(str, tag);
131  str[4] = '\0';
132  if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
133  uint32_t oti;
134  tags[0] = ff_mp4_obj_type;
135  oti = av_codec_get_tag(tags, par->codec_id);
136  if (oti)
137  av_strlcatf(str, size, ".%02"PRIx32, oti);
138  else
139  return;
140 
141  if (tag == MKTAG('m', 'p', '4', 'a')) {
142  if (par->extradata_size >= 2) {
143  int aot = par->extradata[0] >> 3;
144  if (aot == 31)
145  aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
146  av_strlcatf(str, size, ".%d", aot);
147  }
148  } else if (tag == MKTAG('m', 'p', '4', 'v')) {
149  // Unimplemented, should output ProfileLevelIndication as a decimal number
150  av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
151  }
152  } else if (!strcmp(str, "avc1")) {
153  uint8_t *tmpbuf = NULL;
154  uint8_t *extradata = par->extradata;
155  int extradata_size = par->extradata_size;
156  if (!extradata_size)
157  return;
158  if (extradata[0] != 1) {
159  AVIOContext *pb;
160  if (avio_open_dyn_buf(&pb) < 0)
161  return;
162  if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
163  ffio_free_dyn_buf(&pb);
164  return;
165  }
166  extradata_size = avio_close_dyn_buf(pb, &extradata);
167  tmpbuf = extradata;
168  }
169 
170  if (extradata_size >= 4)
171  av_strlcatf(str, size, ".%02x%02x%02x",
172  extradata[1], extradata[2], extradata[3]);
173  av_free(tmpbuf);
174  }
175 }
176 
178 {
179  DASHContext *c = s->priv_data;
180  int i, j;
181  if (!c->streams)
182  return;
183  for (i = 0; i < s->nb_streams; i++) {
184  OutputStream *os = &c->streams[i];
185  if (os->ctx && os->ctx_inited)
186  av_write_trailer(os->ctx);
187  if (os->ctx && os->ctx->pb)
188  av_free(os->ctx->pb);
189  ff_format_io_close(s, &os->out);
190  if (os->ctx)
192  for (j = 0; j < os->nb_segments; j++)
193  av_free(os->segments[j]);
194  av_free(os->segments);
195  }
196  av_freep(&c->streams);
197 }
198 
200 {
201  int i, start_index = 0, start_number = 1;
202  if (c->window_size) {
203  start_index = FFMAX(os->nb_segments - c->window_size, 0);
204  start_number = FFMAX(os->segment_index - c->window_size, 1);
205  }
206 
207  if (c->use_template) {
208  int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
209  avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
210  if (!c->use_timeline)
211  avio_printf(out, "duration=\"%"PRId64"\" ", c->last_duration);
212  avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
213  if (c->use_timeline) {
214  int64_t cur_time = 0;
215  avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
216  for (i = start_index; i < os->nb_segments; ) {
217  Segment *seg = os->segments[i];
218  int repeat = 0;
219  avio_printf(out, "\t\t\t\t\t\t<S ");
220  if (i == start_index || seg->time != cur_time) {
221  cur_time = seg->time;
222  avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
223  }
224  avio_printf(out, "d=\"%d\" ", seg->duration);
225  while (i + repeat + 1 < os->nb_segments &&
226  os->segments[i + repeat + 1]->duration == seg->duration &&
227  os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
228  repeat++;
229  if (repeat > 0)
230  avio_printf(out, "r=\"%d\" ", repeat);
231  avio_printf(out, "/>\n");
232  i += 1 + repeat;
233  cur_time += (1 + repeat) * seg->duration;
234  }
235  avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
236  }
237  avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
238  } else if (c->single_file) {
239  avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
240  avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
241  avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1);
242  for (i = start_index; i < os->nb_segments; i++) {
243  Segment *seg = os->segments[i];
244  avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
245  if (seg->index_length)
246  avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
247  avio_printf(out, "/>\n");
248  }
249  avio_printf(out, "\t\t\t\t</SegmentList>\n");
250  } else {
251  avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, c->last_duration, start_number);
252  avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
253  for (i = start_index; i < os->nb_segments; i++) {
254  Segment *seg = os->segments[i];
255  avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
256  }
257  avio_printf(out, "\t\t\t\t</SegmentList>\n");
258  }
259 }
260 
261 static DASHTmplId dash_read_tmpl_id(const char *identifier, char *format_tag,
262  size_t format_tag_size, const char **ptr) {
263  const char *next_ptr;
265 
266  if (av_strstart(identifier, "$$", &next_ptr)) {
267  id_type = DASH_TMPL_ID_ESCAPE;
268  *ptr = next_ptr;
269  } else if (av_strstart(identifier, "$RepresentationID$", &next_ptr)) {
270  id_type = DASH_TMPL_ID_REP_ID;
271  // default to basic format, as $RepresentationID$ identifiers
272  // are not allowed to have custom format-tags.
273  av_strlcpy(format_tag, "%d", format_tag_size);
274  *ptr = next_ptr;
275  } else { // the following identifiers may have an explicit format_tag
276  if (av_strstart(identifier, "$Number", &next_ptr))
277  id_type = DASH_TMPL_ID_NUMBER;
278  else if (av_strstart(identifier, "$Bandwidth", &next_ptr))
279  id_type = DASH_TMPL_ID_BANDWIDTH;
280  else if (av_strstart(identifier, "$Time", &next_ptr))
281  id_type = DASH_TMPL_ID_TIME;
282  else
283  id_type = DASH_TMPL_ID_UNDEFINED;
284 
285  // next parse the dash format-tag and generate a c-string format tag
286  // (next_ptr now points at the first '%' at the beginning of the format-tag)
287  if (id_type != DASH_TMPL_ID_UNDEFINED) {
288  const char *number_format = (id_type == DASH_TMPL_ID_TIME) ? PRId64 : "d";
289  if (next_ptr[0] == '$') { // no dash format-tag
290  snprintf(format_tag, format_tag_size, "%%%s", number_format);
291  *ptr = &next_ptr[1];
292  } else {
293  const char *width_ptr;
294  // only tolerate single-digit width-field (i.e. up to 9-digit width)
295  if (av_strstart(next_ptr, "%0", &width_ptr) &&
296  av_isdigit(width_ptr[0]) &&
297  av_strstart(&width_ptr[1], "d$", &next_ptr)) {
298  // yes, we're using a format tag to build format_tag.
299  snprintf(format_tag, format_tag_size, "%s%c%s", "%0", width_ptr[0], number_format);
300  *ptr = next_ptr;
301  } else {
302  av_log(NULL, AV_LOG_WARNING, "Failed to parse format-tag beginning with %s. Expected either a "
303  "closing '$' character or a format-string like '%%0[width]d', "
304  "where width must be a single digit\n", next_ptr);
305  id_type = DASH_TMPL_ID_UNDEFINED;
306  }
307  }
308  }
309  }
310  return id_type;
311 }
312 
313 static void dash_fill_tmpl_params(char *dst, size_t buffer_size,
314  const char *template, int rep_id,
315  int number, int bit_rate,
316  int64_t time) {
317  int dst_pos = 0;
318  const char *t_cur = template;
319  while (dst_pos < buffer_size - 1 && *t_cur) {
320  char format_tag[7]; // May be "%d", "%0Xd", or "%0Xlld" (for $Time$), where X is in [0-9]
321  int n = 0;
322  DASHTmplId id_type;
323  const char *t_next = strchr(t_cur, '$'); // copy over everything up to the first '$' character
324  if (t_next) {
325  int num_copy_bytes = FFMIN(t_next - t_cur, buffer_size - dst_pos - 1);
326  av_strlcpy(&dst[dst_pos], t_cur, num_copy_bytes + 1);
327  // advance
328  dst_pos += num_copy_bytes;
329  t_cur = t_next;
330  } else { // no more DASH identifiers to substitute - just copy the rest over and break
331  av_strlcpy(&dst[dst_pos], t_cur, buffer_size - dst_pos);
332  break;
333  }
334 
335  if (dst_pos >= buffer_size - 1 || !*t_cur)
336  break;
337 
338  // t_cur is now pointing to a '$' character
339  id_type = dash_read_tmpl_id(t_cur, format_tag, sizeof(format_tag), &t_next);
340  switch (id_type) {
341  case DASH_TMPL_ID_ESCAPE:
342  av_strlcpy(&dst[dst_pos], "$", 2);
343  n = 1;
344  break;
345  case DASH_TMPL_ID_REP_ID:
346  n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, rep_id);
347  break;
348  case DASH_TMPL_ID_NUMBER:
349  n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, number);
350  break;
352  n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, bit_rate);
353  break;
354  case DASH_TMPL_ID_TIME:
355  n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, time);
356  break;
358  // copy over one byte and advance
359  av_strlcpy(&dst[dst_pos], t_cur, 2);
360  n = 1;
361  t_next = &t_cur[1];
362  break;
363  }
364  // t_next points just past the processed identifier
365  // n is the number of bytes that were attempted to be written to dst
366  // (may have failed to write all because buffer_size).
367 
368  // advance
369  dst_pos += FFMIN(n, buffer_size - dst_pos - 1);
370  t_cur = t_next;
371  }
372 }
373 
374 static char *xmlescape(const char *str) {
375  int outlen = strlen(str)*3/2 + 6;
376  char *out = av_realloc(NULL, outlen + 1);
377  int pos = 0;
378  if (!out)
379  return NULL;
380  for (; *str; str++) {
381  if (pos + 6 > outlen) {
382  char *tmp;
383  outlen = 2 * outlen + 6;
384  tmp = av_realloc(out, outlen + 1);
385  if (!tmp) {
386  av_free(out);
387  return NULL;
388  }
389  out = tmp;
390  }
391  if (*str == '&') {
392  memcpy(&out[pos], "&amp;", 5);
393  pos += 5;
394  } else if (*str == '<') {
395  memcpy(&out[pos], "&lt;", 4);
396  pos += 4;
397  } else if (*str == '>') {
398  memcpy(&out[pos], "&gt;", 4);
399  pos += 4;
400  } else if (*str == '\'') {
401  memcpy(&out[pos], "&apos;", 6);
402  pos += 6;
403  } else if (*str == '\"') {
404  memcpy(&out[pos], "&quot;", 6);
405  pos += 6;
406  } else {
407  out[pos++] = *str;
408  }
409  }
410  out[pos] = '\0';
411  return out;
412 }
413 
414 static void write_time(AVIOContext *out, int64_t time)
415 {
416  int seconds = time / AV_TIME_BASE;
417  int fractions = time % AV_TIME_BASE;
418  int minutes = seconds / 60;
419  int hours = minutes / 60;
420  seconds %= 60;
421  minutes %= 60;
422  avio_printf(out, "PT");
423  if (hours)
424  avio_printf(out, "%dH", hours);
425  if (hours || minutes)
426  avio_printf(out, "%dM", minutes);
427  avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
428 }
429 
430 static void format_date_now(char *buf, int size)
431 {
432  time_t t = time(NULL);
433  struct tm *ptm, tmbuf;
434  ptm = gmtime_r(&t, &tmbuf);
435  if (ptm) {
436  if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm))
437  buf[0] = '\0';
438  }
439 }
440 
441 static int write_manifest(AVFormatContext *s, int final)
442 {
443  DASHContext *c = s->priv_data;
444  AVIOContext *out;
445  char temp_filename[1024];
446  int ret, i;
447  const char *proto = avio_find_protocol_name(s->filename);
448  int use_rename = proto && !strcmp(proto, "file");
449  static unsigned int warned_non_file = 0;
450  AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
451 
452  if (!use_rename && !warned_non_file++)
453  av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
454 
455  snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
456  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
457  if (ret < 0) {
458  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
459  return ret;
460  }
461  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
462  avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
463  "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
464  "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
465  "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
466  "\tprofiles=\"urn:mpeg:dash:profile:isoff-live:2011\"\n"
467  "\ttype=\"%s\"\n", final ? "static" : "dynamic");
468  if (final) {
469  avio_printf(out, "\tmediaPresentationDuration=\"");
470  write_time(out, c->total_duration);
471  avio_printf(out, "\"\n");
472  } else {
473  int64_t update_period = c->last_duration / AV_TIME_BASE;
474  char now_str[100];
475  if (c->use_template && !c->use_timeline)
476  update_period = 500;
477  avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
478  avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
479  if (!c->availability_start_time[0] && s->nb_streams > 0 && c->streams[0].nb_segments > 0) {
481  }
482  if (c->availability_start_time[0])
483  avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
484  format_date_now(now_str, sizeof(now_str));
485  if (now_str[0])
486  avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
487  if (c->window_size && c->use_template) {
488  avio_printf(out, "\ttimeShiftBufferDepth=\"");
489  write_time(out, c->last_duration * c->window_size);
490  avio_printf(out, "\"\n");
491  }
492  }
493  avio_printf(out, "\tminBufferTime=\"");
494  write_time(out, c->last_duration);
495  avio_printf(out, "\">\n");
496  avio_printf(out, "\t<ProgramInformation>\n");
497  if (title) {
498  char *escaped = xmlescape(title->value);
499  avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
500  av_free(escaped);
501  }
502  avio_printf(out, "\t</ProgramInformation>\n");
503  if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
504  OutputStream *os = &c->streams[0];
505  int start_index = FFMAX(os->nb_segments - c->window_size, 0);
506  int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
507  avio_printf(out, "\t<Period start=\"");
508  write_time(out, start_time);
509  avio_printf(out, "\">\n");
510  } else {
511  avio_printf(out, "\t<Period start=\"PT0.0S\">\n");
512  }
513 
514  if (c->has_video) {
515  avio_printf(out, "\t\t<AdaptationSet contentType=\"video\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"");
517  avio_printf(out, " %s=\"%d/%d\"", (av_cmp_q(c->min_frame_rate, c->max_frame_rate) < 0) ? "maxFrameRate" : "frameRate", c->max_frame_rate.num, c->max_frame_rate.den);
518  avio_printf(out, ">\n");
519 
520  for (i = 0; i < s->nb_streams; i++) {
521  AVStream *st = s->streams[i];
522  OutputStream *os = &c->streams[i];
523 
525  continue;
526 
527  avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/mp4\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"", i, os->codec_str, os->bandwidth_str, st->codecpar->width, st->codecpar->height);
528  if (st->avg_frame_rate.num)
529  avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
530  avio_printf(out, ">\n");
531 
532  output_segment_list(&c->streams[i], out, c);
533  avio_printf(out, "\t\t\t</Representation>\n");
534  }
535  avio_printf(out, "\t\t</AdaptationSet>\n");
536  }
537  if (c->has_audio) {
538  avio_printf(out, "\t\t<AdaptationSet contentType=\"audio\" segmentAlignment=\"true\" bitstreamSwitching=\"true\">\n");
539  for (i = 0; i < s->nb_streams; i++) {
540  AVStream *st = s->streams[i];
541  OutputStream *os = &c->streams[i];
542 
544  continue;
545 
546  avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/mp4\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n", i, os->codec_str, os->bandwidth_str, st->codecpar->sample_rate);
547  avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n", st->codecpar->channels);
548  output_segment_list(&c->streams[i], out, c);
549  avio_printf(out, "\t\t\t</Representation>\n");
550  }
551  avio_printf(out, "\t\t</AdaptationSet>\n");
552  }
553  avio_printf(out, "\t</Period>\n");
554  avio_printf(out, "</MPD>\n");
555  avio_flush(out);
556  ff_format_io_close(s, &out);
557 
558  if (use_rename)
559  return avpriv_io_move(temp_filename, s->filename);
560 
561  return 0;
562 }
563 
565 {
566  DASHContext *c = s->priv_data;
567  int i;
568 
569  for (i = 0; i < s->nb_streams; i++) {
570  OutputStream *os = &c->streams[i];
571 
572  os->bit_rate = s->streams[i]->codecpar->bit_rate;
573  if (os->bit_rate) {
574  snprintf(os->bandwidth_str, sizeof(os->bandwidth_str),
575  " bandwidth=\"%d\"", os->bit_rate);
576  } else {
579  av_log(s, level, "No bit rate set for stream %d\n", i);
581  return AVERROR(EINVAL);
582  }
583  }
584 
585  return 0;
586 }
587 
589 {
590  DASHContext *c = s->priv_data;
591  int ret = 0, i;
592  AVOutputFormat *oformat;
593  char *ptr;
594  char basename[1024];
595 
596  if (c->single_file_name)
597  c->single_file = 1;
598  if (c->single_file)
599  c->use_template = 0;
600  c->ambiguous_frame_rate = 0;
601 
602  av_strlcpy(c->dirname, s->filename, sizeof(c->dirname));
603  ptr = strrchr(c->dirname, '/');
604  if (ptr) {
605  av_strlcpy(basename, &ptr[1], sizeof(basename));
606  ptr[1] = '\0';
607  } else {
608  c->dirname[0] = '\0';
609  av_strlcpy(basename, s->filename, sizeof(basename));
610  }
611 
612  ptr = strrchr(basename, '.');
613  if (ptr)
614  *ptr = '\0';
615 
616  oformat = av_guess_format("mp4", NULL, NULL);
617  if (!oformat)
619 
620  c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
621  if (!c->streams)
622  return AVERROR(ENOMEM);
623 
624  ret = set_bitrate(s);
625  if (ret < 0)
626  return ret;
627 
628  for (i = 0; i < s->nb_streams; i++) {
629  OutputStream *os = &c->streams[i];
631  AVStream *st;
633  char filename[1024];
634 
635  ctx = avformat_alloc_context();
636  if (!ctx)
637  return AVERROR(ENOMEM);
638  os->ctx = ctx;
639  ctx->oformat = oformat;
641  ctx->opaque = s->opaque;
642  ctx->io_close = s->io_close;
643  ctx->io_open = s->io_open;
644 
645  if (!(st = avformat_new_stream(ctx, NULL)))
646  return AVERROR(ENOMEM);
649  st->time_base = s->streams[i]->time_base;
651  ctx->flags = s->flags;
652 
653  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, dash_write, NULL);
654  if (!ctx->pb)
655  return AVERROR(ENOMEM);
656 
657  if (c->single_file) {
658  if (c->single_file_name)
659  dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
660  else
661  snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
662  } else {
663  dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
664  }
665  snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
666  ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, NULL);
667  if (ret < 0)
668  return ret;
669  os->init_start_pos = 0;
670 
671  av_dict_set(&opts, "movflags", "frag_custom+dash+delay_moov", 0);
672  if ((ret = avformat_init_output(ctx, &opts)) < 0)
673  return ret;
674  os->ctx_inited = 1;
675  avio_flush(ctx->pb);
676  av_dict_free(&opts);
677 
678  av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
679 
680  s->streams[i]->time_base = st->time_base;
681  // If the muxer wants to shift timestamps, request to have them shifted
682  // already before being handed to this muxer, so we don't have mismatches
683  // between the MPD and the actual segments.
685  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
686  AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
687  if (avg_frame_rate.num > 0) {
688  if (av_cmp_q(avg_frame_rate, c->min_frame_rate) < 0)
689  c->min_frame_rate = avg_frame_rate;
690  if (av_cmp_q(c->max_frame_rate, avg_frame_rate) < 0)
691  c->max_frame_rate = avg_frame_rate;
692  } else {
693  c->ambiguous_frame_rate = 1;
694  }
695  c->has_video = 1;
696  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
697  c->has_audio = 1;
698  }
699 
700  set_codec_str(s, st->codecpar, os->codec_str, sizeof(os->codec_str));
702  os->max_pts = AV_NOPTS_VALUE;
703  os->last_dts = AV_NOPTS_VALUE;
704  os->segment_index = 1;
705  }
706 
707  if (!c->has_video && c->min_seg_duration <= 0) {
708  av_log(s, AV_LOG_WARNING, "no video stream and no min seg duration set\n");
709  return AVERROR(EINVAL);
710  }
711  return 0;
712 }
713 
715 {
716  DASHContext *c = s->priv_data;
717  int i, ret;
718  for (i = 0; i < s->nb_streams; i++) {
719  OutputStream *os = &c->streams[i];
720  if ((ret = avformat_write_header(os->ctx, NULL)) < 0) {
721  dash_free(s);
722  return ret;
723  }
724  }
725  ret = write_manifest(s, 0);
726  if (!ret)
727  av_log(s, AV_LOG_VERBOSE, "Manifest written to: %s\n", s->filename);
728  return ret;
729 }
730 
731 static int add_segment(OutputStream *os, const char *file,
732  int64_t time, int duration,
733  int64_t start_pos, int64_t range_length,
734  int64_t index_length)
735 {
736  int err;
737  Segment *seg;
738  if (os->nb_segments >= os->segments_size) {
739  os->segments_size = (os->segments_size + 1) * 2;
740  if ((err = av_reallocp(&os->segments, sizeof(*os->segments) *
741  os->segments_size)) < 0) {
742  os->segments_size = 0;
743  os->nb_segments = 0;
744  return err;
745  }
746  }
747  seg = av_mallocz(sizeof(*seg));
748  if (!seg)
749  return AVERROR(ENOMEM);
750  av_strlcpy(seg->file, file, sizeof(seg->file));
751  seg->time = time;
752  seg->duration = duration;
753  if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
754  seg->duration += seg->time;
755  seg->time = 0;
756  }
757  seg->start_pos = start_pos;
758  seg->range_length = range_length;
759  seg->index_length = index_length;
760  os->segments[os->nb_segments++] = seg;
761  os->segment_index++;
762  return 0;
763 }
764 
765 static void write_styp(AVIOContext *pb)
766 {
767  avio_wb32(pb, 24);
768  ffio_wfourcc(pb, "styp");
769  ffio_wfourcc(pb, "msdh");
770  avio_wb32(pb, 0); /* minor */
771  ffio_wfourcc(pb, "msdh");
772  ffio_wfourcc(pb, "msix");
773 }
774 
775 static void find_index_range(AVFormatContext *s, const char *full_path,
776  int64_t pos, int *index_length)
777 {
778  uint8_t buf[8];
779  AVIOContext *pb;
780  int ret;
781 
782  ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
783  if (ret < 0)
784  return;
785  if (avio_seek(pb, pos, SEEK_SET) != pos) {
786  ff_format_io_close(s, &pb);
787  return;
788  }
789  ret = avio_read(pb, buf, 8);
790  ff_format_io_close(s, &pb);
791  if (ret < 8)
792  return;
793  if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
794  return;
795  *index_length = AV_RB32(&buf[0]);
796 }
797 
799  AVCodecParameters *par)
800 {
801  uint8_t *extradata;
802 
803  if (os->ctx->streams[0]->codecpar->extradata_size || !par->extradata_size)
804  return 0;
805 
806  extradata = av_malloc(par->extradata_size);
807 
808  if (!extradata)
809  return AVERROR(ENOMEM);
810 
811  memcpy(extradata, par->extradata, par->extradata_size);
812 
813  os->ctx->streams[0]->codecpar->extradata = extradata;
815 
816  set_codec_str(s, par, os->codec_str, sizeof(os->codec_str));
817 
818  return 0;
819 }
820 
821 static int dash_flush(AVFormatContext *s, int final, int stream)
822 {
823  DASHContext *c = s->priv_data;
824  int i, ret = 0;
825 
826  const char *proto = avio_find_protocol_name(s->filename);
827  int use_rename = proto && !strcmp(proto, "file");
828 
829  int cur_flush_segment_index = 0;
830  if (stream >= 0)
831  cur_flush_segment_index = c->streams[stream].segment_index;
832 
833  for (i = 0; i < s->nb_streams; i++) {
834  OutputStream *os = &c->streams[i];
835  char filename[1024] = "", full_path[1024], temp_path[1024];
836  int64_t start_pos;
837  int range_length, index_length = 0;
838 
839  if (!os->packets_written)
840  continue;
841 
842  // Flush the single stream that got a keyframe right now.
843  // Flush all audio streams as well, in sync with video keyframes,
844  // but not the other video streams.
845  if (stream >= 0 && i != stream) {
847  continue;
848  // Make sure we don't flush audio streams multiple times, when
849  // all video streams are flushed one at a time.
850  if (c->has_video && os->segment_index > cur_flush_segment_index)
851  continue;
852  }
853 
854  if (!os->init_range_length) {
855  av_write_frame(os->ctx, NULL);
856  os->init_range_length = avio_tell(os->ctx->pb);
857  if (!c->single_file)
858  ff_format_io_close(s, &os->out);
859  }
860 
861  start_pos = avio_tell(os->ctx->pb);
862 
863  if (!c->single_file) {
864  dash_fill_tmpl_params(filename, sizeof(filename), c->media_seg_name, i, os->segment_index, os->bit_rate, os->start_pts);
865  snprintf(full_path, sizeof(full_path), "%s%s", c->dirname, filename);
866  snprintf(temp_path, sizeof(temp_path), use_rename ? "%s.tmp" : "%s", full_path);
867  ret = s->io_open(s, &os->out, temp_path, AVIO_FLAG_WRITE, NULL);
868  if (ret < 0)
869  break;
870  write_styp(os->ctx->pb);
871  } else {
872  snprintf(full_path, sizeof(full_path), "%s%s", c->dirname, os->initfile);
873  }
874 
875  av_write_frame(os->ctx, NULL);
876  avio_flush(os->ctx->pb);
877  os->packets_written = 0;
878 
879  range_length = avio_tell(os->ctx->pb) - start_pos;
880  if (c->single_file) {
881  find_index_range(s, full_path, start_pos, &index_length);
882  } else {
883  ff_format_io_close(s, &os->out);
884 
885  if (use_rename) {
886  ret = avpriv_io_move(temp_path, full_path);
887  if (ret < 0)
888  break;
889  }
890  }
891  add_segment(os, filename, os->start_pts, os->max_pts - os->start_pts, start_pos, range_length, index_length);
892  av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, full_path);
893  }
894 
895  if (c->window_size || (final && c->remove_at_exit)) {
896  for (i = 0; i < s->nb_streams; i++) {
897  OutputStream *os = &c->streams[i];
898  int j;
899  int remove = os->nb_segments - c->window_size - c->extra_window_size;
900  if (final && c->remove_at_exit)
901  remove = os->nb_segments;
902  if (remove > 0) {
903  for (j = 0; j < remove; j++) {
904  char filename[1024];
905  snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->segments[j]->file);
906  unlink(filename);
907  av_free(os->segments[j]);
908  }
909  os->nb_segments -= remove;
910  memmove(os->segments, os->segments + remove, os->nb_segments * sizeof(*os->segments));
911  }
912  }
913  }
914 
915  if (ret >= 0)
916  ret = write_manifest(s, final);
917  return ret;
918 }
919 
921 {
922  DASHContext *c = s->priv_data;
923  AVStream *st = s->streams[pkt->stream_index];
924  OutputStream *os = &c->streams[pkt->stream_index];
925  int64_t seg_end_duration = (os->segment_index) * (int64_t) c->min_seg_duration;
926  int ret;
927 
928  ret = update_stream_extradata(s, os, st->codecpar);
929  if (ret < 0)
930  return ret;
931 
932  // Fill in a heuristic guess of the packet duration, if none is available.
933  // The mp4 muxer will do something similar (for the last packet in a fragment)
934  // if nothing is set (setting it for the other packets doesn't hurt).
935  // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
936  // invoke its heuristic (this doesn't have to be identical to that algorithm),
937  // so that we know the exact timestamps of fragments.
938  if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
939  pkt->duration = pkt->dts - os->last_dts;
940  os->last_dts = pkt->dts;
941 
942  // If forcing the stream to start at 0, the mp4 muxer will set the start
943  // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
944  if (os->first_pts == AV_NOPTS_VALUE &&
946  pkt->pts -= pkt->dts;
947  pkt->dts = 0;
948  }
949 
950  if (os->first_pts == AV_NOPTS_VALUE)
951  os->first_pts = pkt->pts;
952 
953  if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
954  pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
955  av_compare_ts(pkt->pts - os->first_pts, st->time_base,
956  seg_end_duration, AV_TIME_BASE_Q) >= 0) {
957  int64_t prev_duration = c->last_duration;
958 
959  c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
960  st->time_base,
962  c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
963  st->time_base,
965 
966  if ((!c->use_timeline || !c->use_template) && prev_duration) {
967  if (c->last_duration < prev_duration*9/10 ||
968  c->last_duration > prev_duration*11/10) {
970  "Segment durations differ too much, enable use_timeline "
971  "and use_template, or keep a stricter keyframe interval\n");
972  }
973  }
974 
975  if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
976  return ret;
977  }
978 
979  if (!os->packets_written) {
980  // If we wrote a previous segment, adjust the start time of the segment
981  // to the end of the previous one (which is the same as the mp4 muxer
982  // does). This avoids gaps in the timeline.
983  if (os->max_pts != AV_NOPTS_VALUE)
984  os->start_pts = os->max_pts;
985  else
986  os->start_pts = pkt->pts;
987  }
988  if (os->max_pts == AV_NOPTS_VALUE)
989  os->max_pts = pkt->pts + pkt->duration;
990  else
991  os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
992  os->packets_written++;
993  return ff_write_chained(os->ctx, 0, pkt, s, 0);
994 }
995 
997 {
998  DASHContext *c = s->priv_data;
999 
1000  set_bitrate(s);
1001 
1002  if (s->nb_streams > 0) {
1003  OutputStream *os = &c->streams[0];
1004  // If no segments have been written so far, try to do a crude
1005  // guess of the segment duration
1006  if (!c->last_duration)
1008  s->streams[0]->time_base,
1009  AV_TIME_BASE_Q);
1011  s->streams[0]->time_base,
1012  AV_TIME_BASE_Q);
1013  }
1014  dash_flush(s, 1, -1);
1015 
1016  if (c->remove_at_exit) {
1017  char filename[1024];
1018  int i;
1019  for (i = 0; i < s->nb_streams; i++) {
1020  OutputStream *os = &c->streams[i];
1021  snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1022  unlink(filename);
1023  }
1024  unlink(s->filename);
1025  }
1026 
1027  return 0;
1028 }
1029 
1030 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
1031 {
1032  DASHContext *c = s->priv_data;
1033  OutputStream *os = &c->streams[avpkt->stream_index];
1034  AVFormatContext *oc = os->ctx;
1035  if (oc->oformat->check_bitstream) {
1036  int ret;
1037  AVPacket pkt = *avpkt;
1038  pkt.stream_index = 0;
1039  ret = oc->oformat->check_bitstream(oc, &pkt);
1040  if (ret == 1) {
1041  AVStream *st = s->streams[avpkt->stream_index];
1042  AVStream *ost = oc->streams[0];
1043  st->internal->bsfcs = ost->internal->bsfcs;
1044  st->internal->nb_bsfcs = ost->internal->nb_bsfcs;
1045  ost->internal->bsfcs = NULL;
1046  ost->internal->nb_bsfcs = 0;
1047  }
1048  return ret;
1049  }
1050  return 1;
1051 }
1052 
1053 #define OFFSET(x) offsetof(DASHContext, x)
1054 #define E AV_OPT_FLAG_ENCODING_PARAM
1055 static const AVOption options[] = {
1056  { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
1057  { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
1058  { "min_seg_duration", "minimum segment duration (in microseconds)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
1059  { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1060  { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1061  { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
1062  { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
1063  { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
1064  { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E },
1065  { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E },
1066  { NULL },
1067 };
1068 
1069 static const AVClass dash_class = {
1070  .class_name = "dash muxer",
1071  .item_name = av_default_item_name,
1072  .option = options,
1073  .version = LIBAVUTIL_VERSION_INT,
1074 };
1075 
1077  .name = "dash",
1078  .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
1079  .priv_data_size = sizeof(DASHContext),
1080  .audio_codec = AV_CODEC_ID_AAC,
1081  .video_codec = AV_CODEC_ID_H264,
1083  .init = dash_init,
1087  .deinit = dash_free,
1088  .codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
1089  .check_bitstream = dash_check_bitstream,
1090  .priv_class = &dash_class,
1091 };
AVRational max_frame_rate
Definition: dashenc.c:99
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:672
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:155
int use_timeline
Definition: dashenc.c:88
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:206
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1605
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1319
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
int min_seg_duration
Definition: dashenc.c:85
static const AVOption options[]
Definition: dashenc.c:1055
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:932
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int range_length
Definition: dashenc.c:56
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int64_t cur_time
Definition: ffserver.c:252
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1378
int nb_segments
Definition: dashenc.c:71
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:4066
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:959
int num
Numerator.
Definition: rational.h:59
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
#define AVIO_FLAG_READ
read-only
Definition: avio.h:620
int n
Definition: dashenc.c:59
int(* check_bitstream)(struct AVFormatContext *, const AVPacket *pkt)
Set up any necessary bitstream filtering and extract any extra data needed for the global header...
Definition: avformat.h:649
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:621
char codec_str[100]
Definition: dashenc.c:78
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
AVFormatContext * ctx
Definition: dashenc.c:63
int single_file
Definition: dashenc.c:89
static AVPacket pkt
char availability_start_time[100]
Definition: dashenc.c:94
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:87
static void output_segment_list(OutputStream *os, AVIOContext *out, DASHContext *c)
Definition: dashenc.c:199
int packets_written
Definition: dashenc.c:67
int64_t start_pts
Definition: dashenc.c:73
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1290
int strict_std_compliance
Allow non-standard and experimental extension.
Definition: avformat.h:1635
static int dash_init(AVFormatContext *s)
Definition: dashenc.c:588
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4058
int avpriv_io_move(const char *url_src, const char *url_dst)
Move or rename a resource.
Definition: avio.c:499
int64_t last_dts
Definition: dashenc.c:74
Format I/O context.
Definition: avformat.h:1349
int64_t init_start_pos
Definition: dashenc.c:69
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
static int64_t start_time
Definition: ffplay.c:328
uint8_t
#define av_malloc(s)
int width
Video only.
Definition: avcodec.h:4132
AVOptions.
miscellaneous OS support macros and functions.
const AVCodecTag ff_codec_movvideo_tags[]
Definition: isom.c:74
static int set_bitrate(AVFormatContext *s)
Definition: dashenc.c:564
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1675
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5313
int extra_window_size
Definition: dashenc.c:84
int ctx_inited
Definition: dashenc.c:64
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4231
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
int64_t duration
Definition: movenc.c:63
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
uint8_t iobuf[32768]
Definition: dashenc.c:65
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 flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1460
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1413
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
AVRational min_frame_rate
Definition: dashenc.c:99
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:525
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:205
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:66
char initfile[1024]
Definition: dashenc.c:68
static void format_date_now(char *buf, int size)
Definition: dashenc.c:430
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:616
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1368
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:4095
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1689
static void write_time(AVIOContext *out, int64_t time)
Definition: dashenc.c:414
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
static int write_manifest(AVFormatContext *s, int final)
Definition: dashenc.c:441
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:127
#define E
Definition: dashenc.c:1054
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:4189
#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:1567
int remove_at_exit
Definition: dashenc.c:86
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
int64_t last_duration
Definition: dashenc.c:92
static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: dashenc.c:920
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
int duration
Definition: dashenc.c:58
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:4062
simple assert() macros that are a bit more flexible than ISO C assert().
static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
Definition: dashenc.c:1030
int64_t start_pos
Definition: dashenc.c:55
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:970
#define FFMAX(a, b)
Definition: common.h:94
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
char bandwidth_str[64]
Definition: dashenc.c:76
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1663
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare two timestamps each in its own time base.
Definition: mathematics.c:147
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:4084
void * opaque
User data.
Definition: avformat.h:1833
AVOutputFormat ff_dash_muxer
Definition: dashenc.c:1076
int ambiguous_frame_rate
Definition: dashenc.c:100
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
AVDictionary * opts
Definition: movenc.c:50
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:162
const char * media_seg_name
Definition: dashenc.c:98
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:225
char filename[1024]
input or output filename
Definition: avformat.h:1425
static DASHTmplId dash_read_tmpl_id(const char *identifier, char *format_tag, size_t format_tag_size, const char **ptr)
Definition: dashenc.c:261
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
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:519
#define FFMIN(a, b)
Definition: common.h:96
int segment_index
Definition: dashenc.c:71
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:485
const char * name
Definition: avformat.h:524
AVFormatContext * ctx
Definition: movenc.c:48
char dirname[1024]
Definition: dashenc.c:95
int avoid_negative_ts
Avoid negative timestamps during muxing.
Definition: avformat.h:1658
int n
Definition: avisynth_c.h:684
AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)
Return the output format in the list of registered output formats which best matches the provided par...
Definition: format.c:98
static int dash_write(void *opaque, uint8_t *buf, int buf_size)
Definition: dashenc.c:103
DASHTmplId
Definition: dashenc.c:44
av_warn_unused_result int avformat_init_output(AVFormatContext *s, AVDictionary **options)
Allocate the stream private data and initialize the codec, but do not write the header.
Definition: mux.c:491
int segments_size
Definition: dashenc.c:71
#define OFFSET(x)
Definition: dashenc.c:1053
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1347
Stream structure.
Definition: avformat.h:889
int64_t time
Definition: dashenc.c:57
Segment ** segments
Definition: dashenc.c:72
int index_length
Definition: dashenc.c:56
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Definition: mem.c:163
AVStreamInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1241
const AVCodecTag ff_codec_movaudio_tags[]
Definition: isom.c:306
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
int bit_rate
Definition: dashenc.c:75
int use_template
Definition: dashenc.c:87
void * buf
Definition: avisynth_c.h:690
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 void set_codec_str(AVFormatContext *s, AVCodecParameters *par, char *str, int size)
Definition: dashenc.c:112
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * init_seg_name
Definition: dashenc.c:97
Rational number (pair of numerator and denominator).
Definition: rational.h:58
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
#define FF_COMPLIANCE_STRICT
Strictly conform to all the things in the spec no matter what consequences.
Definition: avcodec.h:2953
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4166
int64_t total_duration
Definition: dashenc.c:93
static void find_index_range(AVFormatContext *s, const char *full_path, int64_t pos, int *index_length)
Definition: dashenc.c:775
char file[1024]
Definition: dashenc.c:54
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
Definition: avio.c:473
uint8_t level
Definition: svq3.c:207
OutputStream * streams
Definition: dashenc.c:90
int init_range_length
Definition: dashenc.c:70
int sample_rate
Audio only.
Definition: avcodec.h:4176
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO
Shift timestamps so that they start at 0.
Definition: avformat.h:1661
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
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:478
Utilties for rational number calculation.
const char * single_file_name
Definition: dashenc.c:96
static double c[64]
int den
Denominator.
Definition: rational.h:60
static void write_styp(AVIOContext *pb)
Definition: dashenc.c:765
static int dash_write_header(AVFormatContext *s)
Definition: dashenc.c:714
#define av_free(p)
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1377
static int dash_write_trailer(AVFormatContext *s)
Definition: dashenc.c:996
int window_size
Definition: dashenc.c:83
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
static void dash_free(AVFormatContext *s)
Definition: dashenc.c:177
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4080
int has_video
Definition: dashenc.c:91
int channels
Audio only.
Definition: avcodec.h:4172
int64_t max_pts
Definition: dashenc.c:73
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1656
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1307
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:366
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static int update_stream_extradata(AVFormatContext *s, OutputStream *os, AVCodecParameters *par)
Definition: dashenc.c:798
int has_audio
Definition: dashenc.c:91
unbuffered private I/O API
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
static void dash_fill_tmpl_params(char *dst, size_t buffer_size, const char *template, int rep_id, int number, int bit_rate, int64_t time)
Definition: dashenc.c:313
AVCodecParameters * codecpar
Definition: avformat.h:1252
static char * xmlescape(const char *str)
Definition: dashenc.c:374
AVIOContext * out
Definition: dashenc.c:66
static int dash_flush(AVFormatContext *s, int final, int stream)
Definition: dashenc.c:821
int stream_index
Definition: avcodec.h:1659
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:926
int64_t first_pts
Definition: ffmpeg.h:451
#define MKTAG(a, b, c, d)
Definition: common.h:342
unsigned int av_codec_get_tag(const struct AVCodecTag *const *tags, enum AVCodecID id)
Get the codec tag for the given codec id id.
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:501
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
Definition: avformat.h:1909
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1634
void(* io_close)(struct AVFormatContext *s, AVIOContext *pb)
A callback for closing the streams opened with AVFormatContext.io_open().
Definition: avformat.h:1915
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1650
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
Definition: avc.c:106
static const AVClass dash_class
Definition: dashenc.c:1069
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
#define AV_WL32(p, v)
Definition: intreadwrite.h:431
static int add_segment(OutputStream *os, const char *file, int64_t time, int duration, int64_t start_pos, int64_t range_length, int64_t index_length)
Definition: dashenc.c:731
static uint8_t tmp[11]
Definition: aes_ctr.c:26