FFmpeg  4.2.1
smoothstreamingenc.c
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1 /*
2  * Live smooth streaming fragmenter
3  * Copyright (c) 2012 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 #include <float.h>
24 #if HAVE_UNISTD_H
25 #include <unistd.h>
26 #endif
27 
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "internal.h"
31 #include "os_support.h"
32 #include "avc.h"
33 #include "url.h"
34 #include "isom.h"
35 
36 #include "libavutil/opt.h"
37 #include "libavutil/avstring.h"
38 #include "libavutil/file.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/intreadwrite.h"
41 
42 typedef struct Fragment {
43  char file[1024];
44  char infofile[1024];
45  int64_t start_time, duration;
46  int n;
47  int64_t start_pos, size;
48 } Fragment;
49 
50 typedef struct OutputStream {
52  int ctx_inited;
53  char dirname[1024];
54  uint8_t iobuf[32768];
55  URLContext *out; // Current output stream where all output is written
56  URLContext *out2; // Auxiliary output stream where all output is also written
57  URLContext *tail_out; // The actual main output stream, if we're currently seeked back to write elsewhere
58  int64_t tail_pos, cur_pos, cur_start_pos;
59  int packets_written;
60  const char *stream_type_tag;
61  int nb_fragments, fragments_size, fragment_index;
62  Fragment **fragments;
63 
64  const char *fourcc;
65  char *private_str;
67  int audio_tag;
68 } OutputStream;
69 
70 typedef struct SmoothStreamingContext {
71  const AVClass *class; /* Class for private options. */
78  int has_video, has_audio;
81 
82 static int ism_write(void *opaque, uint8_t *buf, int buf_size)
83 {
84  OutputStream *os = opaque;
85  if (os->out)
86  ffurl_write(os->out, buf, buf_size);
87  if (os->out2)
88  ffurl_write(os->out2, buf, buf_size);
89  os->cur_pos += buf_size;
90  if (os->cur_pos >= os->tail_pos)
91  os->tail_pos = os->cur_pos;
92  return buf_size;
93 }
94 
95 static int64_t ism_seek(void *opaque, int64_t offset, int whence)
96 {
97  OutputStream *os = opaque;
98  int i;
99  if (whence != SEEK_SET)
100  return AVERROR(ENOSYS);
101  if (os->tail_out) {
102  if (os->out) {
103  ffurl_close(os->out);
104  }
105  if (os->out2) {
106  ffurl_close(os->out2);
107  }
108  os->out = os->tail_out;
109  os->out2 = NULL;
110  os->tail_out = NULL;
111  }
112  if (offset >= os->cur_start_pos) {
113  if (os->out)
114  ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET);
115  os->cur_pos = offset;
116  return offset;
117  }
118  for (i = os->nb_fragments - 1; i >= 0; i--) {
119  Fragment *frag = os->fragments[i];
120  if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) {
121  int ret;
123  os->tail_out = os->out;
124  av_dict_set(&opts, "truncate", "0", 0);
125  ret = ffurl_open_whitelist(&os->out, frag->file, AVIO_FLAG_WRITE,
127  av_dict_free(&opts);
128  if (ret < 0) {
129  os->out = os->tail_out;
130  os->tail_out = NULL;
131  return ret;
132  }
133  av_dict_set(&opts, "truncate", "0", 0);
136  av_dict_free(&opts);
137  ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET);
138  if (os->out2)
139  ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET);
140  os->cur_pos = offset;
141  return offset;
142  }
143  }
144  return AVERROR(EIO);
145 }
146 
148 {
149  AVCodecParameters *par = os->ctx->streams[0]->codecpar;
150  uint8_t *ptr = par->extradata;
151  int size = par->extradata_size;
152  int i;
153  if (par->codec_id == AV_CODEC_ID_H264) {
154  ff_avc_write_annexb_extradata(ptr, &ptr, &size);
155  if (!ptr)
156  ptr = par->extradata;
157  }
158  if (!ptr)
159  return;
160  os->private_str = av_mallocz(2*size + 1);
161  if (!os->private_str)
162  goto fail;
163  for (i = 0; i < size; i++)
164  snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]);
165 fail:
166  if (ptr != par->extradata)
167  av_free(ptr);
168 }
169 
171 {
173  int i, j;
174  if (!c->streams)
175  return;
176  for (i = 0; i < s->nb_streams; i++) {
177  OutputStream *os = &c->streams[i];
178  ffurl_close(os->out);
179  ffurl_close(os->out2);
180  ffurl_close(os->tail_out);
181  os->out = os->out2 = os->tail_out = NULL;
182  if (os->ctx && os->ctx_inited)
183  av_write_trailer(os->ctx);
184  if (os->ctx && os->ctx->pb)
185  avio_context_free(&os->ctx->pb);
186  if (os->ctx)
188  av_freep(&os->private_str);
189  for (j = 0; j < os->nb_fragments; j++)
190  av_freep(&os->fragments[j]);
191  av_freep(&os->fragments);
192  }
193  av_freep(&c->streams);
194 }
195 
196 static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
197 {
198  int removed = 0, i, start = 0;
199  if (os->nb_fragments <= 0)
200  return;
201  if (os->fragments[0]->n > 0)
202  removed = 1;
203  if (final)
204  skip = 0;
205  if (window_size)
206  start = FFMAX(os->nb_fragments - skip - window_size, 0);
207  for (i = start; i < os->nb_fragments - skip; i++) {
208  Fragment *frag = os->fragments[i];
209  if (!final || removed)
210  avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration);
211  else
212  avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration);
213  }
214 }
215 
216 static int write_manifest(AVFormatContext *s, int final)
217 {
219  AVIOContext *out;
220  char filename[1024], temp_filename[1024];
221  int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0;
222  int64_t duration = 0;
223 
224  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
225  snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->url);
226  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
227  if (ret < 0) {
228  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
229  return ret;
230  }
231  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
232  for (i = 0; i < s->nb_streams; i++) {
233  OutputStream *os = &c->streams[i];
234  if (os->nb_fragments > 0) {
235  Fragment *last = os->fragments[os->nb_fragments - 1];
236  duration = last->start_time + last->duration;
237  }
239  video_chunks = os->nb_fragments;
240  video_streams++;
241  } else {
242  audio_chunks = os->nb_fragments;
243  audio_streams++;
244  }
245  }
246  if (!final) {
247  duration = 0;
248  video_chunks = audio_chunks = 0;
249  }
250  if (c->window_size) {
251  video_chunks = FFMIN(video_chunks, c->window_size);
252  audio_chunks = FFMIN(audio_chunks, c->window_size);
253  }
254  avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration);
255  if (!final)
256  avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count);
257  avio_printf(out, ">\n");
258  if (c->has_video) {
259  int last = -1, index = 0;
260  avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks);
261  for (i = 0; i < s->nb_streams; i++) {
262  OutputStream *os = &c->streams[i];
264  continue;
265  last = i;
266  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%"PRId64"\" FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codecpar->bit_rate, os->fourcc, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height, os->private_str);
267  index++;
268  }
269  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
270  avio_printf(out, "</StreamIndex>\n");
271  }
272  if (c->has_audio) {
273  int last = -1, index = 0;
274  avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks);
275  for (i = 0; i < s->nb_streams; i++) {
276  OutputStream *os = &c->streams[i];
278  continue;
279  last = i;
280  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%"PRId64"\" FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" BitsPerSample=\"16\" PacketSize=\"%d\" AudioTag=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codecpar->bit_rate, os->fourcc, s->streams[i]->codecpar->sample_rate, s->streams[i]->codecpar->channels, os->packet_size, os->audio_tag, os->private_str);
281  index++;
282  }
283  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
284  avio_printf(out, "</StreamIndex>\n");
285  }
286  avio_printf(out, "</SmoothStreamingMedia>\n");
287  avio_flush(out);
288  ff_format_io_close(s, &out);
289  return ff_rename(temp_filename, filename, s);
290 }
291 
293 {
295  int ret = 0, i;
296  ff_const59 AVOutputFormat *oformat;
297 
298  if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
299  ret = AVERROR(errno);
300  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
301  goto fail;
302  }
303 
304  oformat = av_guess_format("ismv", NULL, NULL);
305  if (!oformat) {
307  goto fail;
308  }
309 
310  c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams));
311  if (!c->streams) {
312  ret = AVERROR(ENOMEM);
313  goto fail;
314  }
315 
316  for (i = 0; i < s->nb_streams; i++) {
317  OutputStream *os = &c->streams[i];
319  AVStream *st;
321 
322  if (!s->streams[i]->codecpar->bit_rate) {
323  av_log(s, AV_LOG_WARNING, "No bit rate set for stream %d\n", i);
324  // create a tmp name for the directory of fragments
325  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(Tmp_%d)", s->url, i);
326  } else {
327  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
328  }
329 
330  if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
331  ret = AVERROR(errno);
332  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
333  goto fail;
334  }
335 
336  ctx = avformat_alloc_context();
337  if (!ctx || ff_copy_whiteblacklists(ctx, s) < 0) {
338  ret = AVERROR(ENOMEM);
339  goto fail;
340  }
341  os->ctx = ctx;
342  ctx->oformat = oformat;
344 
345  if (!(st = avformat_new_stream(ctx, NULL))) {
346  ret = AVERROR(ENOMEM);
347  goto fail;
348  }
351  st->time_base = s->streams[i]->time_base;
352 
353  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek);
354  if (!ctx->pb) {
355  ret = AVERROR(ENOMEM);
356  goto fail;
357  }
358 
359  av_dict_set_int(&opts, "ism_lookahead", c->lookahead_count, 0);
360  av_dict_set(&opts, "movflags", "frag_custom", 0);
361  if ((ret = avformat_write_header(ctx, &opts)) < 0) {
362  goto fail;
363  }
364  os->ctx_inited = 1;
365  avio_flush(ctx->pb);
366  av_dict_free(&opts);
367  s->streams[i]->time_base = st->time_base;
368  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
369  c->has_video = 1;
370  os->stream_type_tag = "video";
371  if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
372  os->fourcc = "H264";
373  } else if (st->codecpar->codec_id == AV_CODEC_ID_VC1) {
374  os->fourcc = "WVC1";
375  } else {
376  av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
377  ret = AVERROR(EINVAL);
378  goto fail;
379  }
380  } else {
381  c->has_audio = 1;
382  os->stream_type_tag = "audio";
383  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
384  os->fourcc = "AACL";
385  os->audio_tag = 0xff;
386  } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
387  os->fourcc = "WMAP";
388  os->audio_tag = 0x0162;
389  } else {
390  av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
391  ret = AVERROR(EINVAL);
392  goto fail;
393  }
394  os->packet_size = st->codecpar->block_align ? st->codecpar->block_align : 4;
395  }
396  get_private_data(os);
397  }
398 
399  if (!c->has_video && c->min_frag_duration <= 0) {
400  av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
401  ret = AVERROR(EINVAL);
402  goto fail;
403  }
404  ret = write_manifest(s, 0);
405 
406 fail:
407  if (ret)
408  ism_free(s);
409  return ret;
410 }
411 
412 static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
413 {
414  AVIOContext *in;
415  int ret;
416  uint32_t len;
417  if ((ret = s->io_open(s, &in, filename, AVIO_FLAG_READ, NULL)) < 0)
418  return ret;
419  ret = AVERROR(EIO);
420  *moof_size = avio_rb32(in);
421  if (*moof_size < 8 || *moof_size > size)
422  goto fail;
423  if (avio_rl32(in) != MKTAG('m','o','o','f'))
424  goto fail;
425  len = avio_rb32(in);
426  if (len > *moof_size)
427  goto fail;
428  if (avio_rl32(in) != MKTAG('m','f','h','d'))
429  goto fail;
430  avio_seek(in, len - 8, SEEK_CUR);
431  avio_rb32(in); /* traf size */
432  if (avio_rl32(in) != MKTAG('t','r','a','f'))
433  goto fail;
434  while (avio_tell(in) < *moof_size) {
435  uint32_t len = avio_rb32(in);
436  uint32_t tag = avio_rl32(in);
437  int64_t end = avio_tell(in) + len - 8;
438  if (len < 8 || len >= *moof_size)
439  goto fail;
440  if (tag == MKTAG('u','u','i','d')) {
441  static const uint8_t tfxd[] = {
442  0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
443  0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
444  };
445  uint8_t uuid[16];
446  avio_read(in, uuid, 16);
447  if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
448  avio_seek(in, 4, SEEK_CUR);
449  *start_ts = avio_rb64(in);
450  *duration = avio_rb64(in);
451  ret = 0;
452  break;
453  }
454  }
455  avio_seek(in, end, SEEK_SET);
456  }
457 fail:
458  ff_format_io_close(s, &in);
459  return ret;
460 }
461 
462 static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size)
463 {
464  int err;
465  Fragment *frag;
466  if (os->nb_fragments >= os->fragments_size) {
467  os->fragments_size = (os->fragments_size + 1) * 2;
468  if ((err = av_reallocp(&os->fragments, sizeof(*os->fragments) *
469  os->fragments_size)) < 0) {
470  os->fragments_size = 0;
471  os->nb_fragments = 0;
472  return err;
473  }
474  }
475  frag = av_mallocz(sizeof(*frag));
476  if (!frag)
477  return AVERROR(ENOMEM);
478  av_strlcpy(frag->file, file, sizeof(frag->file));
479  av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
480  frag->start_time = start_time;
481  frag->duration = duration;
482  frag->start_pos = start_pos;
483  frag->size = size;
484  frag->n = os->fragment_index;
485  os->fragments[os->nb_fragments++] = frag;
486  os->fragment_index++;
487  return 0;
488 }
489 
490 static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
491 {
492  AVIOContext *in, *out;
493  int ret = 0;
494  if ((ret = s->io_open(s, &in, infile, AVIO_FLAG_READ, NULL)) < 0)
495  return ret;
496  if ((ret = s->io_open(s, &out, outfile, AVIO_FLAG_WRITE, NULL)) < 0) {
497  ff_format_io_close(s, &in);
498  return ret;
499  }
500  while (size > 0) {
501  uint8_t buf[8192];
502  int n = FFMIN(size, sizeof(buf));
503  n = avio_read(in, buf, n);
504  if (n <= 0) {
505  ret = AVERROR(EIO);
506  break;
507  }
508  avio_write(out, buf, n);
509  size -= n;
510  }
511  avio_flush(out);
512  ff_format_io_close(s, &out);
513  ff_format_io_close(s, &in);
514  return ret;
515 }
516 
517 static int ism_flush(AVFormatContext *s, int final)
518 {
520  int i, ret = 0;
521 
522  for (i = 0; i < s->nb_streams; i++) {
523  OutputStream *os = &c->streams[i];
524  char filename[1024], target_filename[1024], header_filename[1024], curr_dirname[1024];
525  int64_t size;
526  int64_t start_ts, duration, moof_size;
527  if (!os->packets_written)
528  continue;
529 
530  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
532  if (ret < 0)
533  break;
534  os->cur_start_pos = os->tail_pos;
535  av_write_frame(os->ctx, NULL);
536  avio_flush(os->ctx->pb);
537  os->packets_written = 0;
538  if (!os->out || os->tail_out)
539  return AVERROR(EIO);
540 
541  ffurl_close(os->out);
542  os->out = NULL;
543  size = os->tail_pos - os->cur_start_pos;
544  if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
545  break;
546 
547  if (!s->streams[i]->codecpar->bit_rate) {
548  int64_t bitrate = (int64_t) size * 8 * AV_TIME_BASE / av_rescale_q(duration, s->streams[i]->time_base, AV_TIME_BASE_Q);
549  if (!bitrate) {
550  av_log(s, AV_LOG_ERROR, "calculating bitrate got zero.\n");
551  ret = AVERROR(EINVAL);
552  return ret;
553  }
554 
555  av_log(s, AV_LOG_DEBUG, "calculated bitrate: %"PRId64"\n", bitrate);
557  memcpy(curr_dirname, os->dirname, sizeof(os->dirname));
558  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
559  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
560 
561  // rename the tmp folder back to the correct name since we now have the bitrate
562  if ((ret = ff_rename((const char*)curr_dirname, os->dirname, s)) < 0)
563  return ret;
564  }
565 
566  snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
567  snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
568  copy_moof(s, filename, header_filename, moof_size);
569  ret = ff_rename(filename, target_filename, s);
570  if (ret < 0)
571  break;
572  add_fragment(os, target_filename, header_filename, start_ts, duration,
573  os->cur_start_pos, size);
574  }
575 
576  if (c->window_size || (final && c->remove_at_exit)) {
577  for (i = 0; i < s->nb_streams; i++) {
578  OutputStream *os = &c->streams[i];
579  int j;
580  int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
581  if (final && c->remove_at_exit)
582  remove = os->nb_fragments;
583  if (remove > 0) {
584  for (j = 0; j < remove; j++) {
585  unlink(os->fragments[j]->file);
586  unlink(os->fragments[j]->infofile);
587  av_freep(&os->fragments[j]);
588  }
589  os->nb_fragments -= remove;
590  memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
591  }
592  if (final && c->remove_at_exit)
593  rmdir(os->dirname);
594  }
595  }
596 
597  if (ret >= 0)
598  ret = write_manifest(s, final);
599  return ret;
600 }
601 
603 {
605  AVStream *st = s->streams[pkt->stream_index];
606  OutputStream *os = &c->streams[pkt->stream_index];
607  int64_t end_dts = (c->nb_fragments + 1) * (int64_t) c->min_frag_duration;
608  int ret;
609 
610  if (st->first_dts == AV_NOPTS_VALUE)
611  st->first_dts = pkt->dts;
612 
613  if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
614  av_compare_ts(pkt->dts - st->first_dts, st->time_base,
615  end_dts, AV_TIME_BASE_Q) >= 0 &&
616  pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
617 
618  if ((ret = ism_flush(s, 0)) < 0)
619  return ret;
620  c->nb_fragments++;
621  }
622 
623  os->packets_written++;
624  return ff_write_chained(os->ctx, 0, pkt, s, 0);
625 }
626 
628 {
630  ism_flush(s, 1);
631 
632  if (c->remove_at_exit) {
633  char filename[1024];
634  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
635  unlink(filename);
636  rmdir(s->url);
637  }
638 
639  ism_free(s);
640  return 0;
641 }
642 
643 #define OFFSET(x) offsetof(SmoothStreamingContext, x)
644 #define E AV_OPT_FLAG_ENCODING_PARAM
645 static const AVOption options[] = {
646  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
647  { "extra_window_size", "number of fragments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
648  { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
649  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
650  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
651  { NULL },
652 };
653 
654 static const AVClass ism_class = {
655  .class_name = "smooth streaming muxer",
656  .item_name = av_default_item_name,
657  .option = options,
658  .version = LIBAVUTIL_VERSION_INT,
659 };
660 
661 
663  .name = "smoothstreaming",
664  .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
665  .priv_data_size = sizeof(SmoothStreamingContext),
666  .audio_codec = AV_CODEC_ID_AAC,
667  .video_codec = AV_CODEC_ID_H264,
672  .priv_class = &ism_class,
673 };
static int write_manifest(AVFormatContext *s, int final)
int nb_fragments
Definition: hdsenc.c:55
static int ism_flush(AVFormatContext *s, int final)
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
int(* io_open)(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **options)
A callback for opening new IO streams.
Definition: avformat.h:1940
char infofile[1024]
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: avformat.h:1083
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
URLContext * tail_out
int ffurl_open_whitelist(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options, const char *whitelist, const char *blacklist, URLContext *parent)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:307
int64_t start_time
Definition: hdsenc.c:41
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1636
AVOption.
Definition: opt.h:246
static int ism_write(void *opaque, uint8_t *buf, int buf_size)
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:878
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define OFFSET(x)
static int ism_write_header(AVFormatContext *s)
int ffurl_write(URLContext *h, const unsigned char *buf, int size)
Write size bytes from buf to the resource accessed by h.
Definition: avio.c:421
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:164
static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
int n
Definition: hdsenc.c:42
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:1318
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
#define AVIO_FLAG_READ
read-only
Definition: avio.h:654
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:655
URLContext * out
AVFormatContext * ctx
Definition: dashenc.c:79
static AVPacket pkt
static void ism_free(AVFormatContext *s)
uint64_t packets_written
Definition: ffmpeg.h:534
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
Format I/O context.
Definition: avformat.h:1358
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
uint8_t
int fragment_index
Definition: hdsenc.c:55
int width
Video only.
Definition: avcodec.h:4023
AVOptions.
miscellaneous OS support macros and functions.
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:800
static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size)
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
char dirname[1024]
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5641
int ctx_inited
Definition: dashenc.c:80
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4459
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:144
Misc file utilities.
uint8_t iobuf[32768]
Definition: hdsenc.c:50
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
Definition: avc.c:198
char * protocol_whitelist
&#39;,&#39; separated list of allowed protocols.
Definition: avformat.h:1918
uint32_t tag
Definition: movenc.c:1496
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:921
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:647
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1509
#define E
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
uint8_t iobuf[32768]
Definition: movenc.c:49
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning...
Definition: avformat.h:549
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:131
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: utils.c:2021
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:769
#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:186
char * url
input or output URL.
Definition: avformat.h:1454
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
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:3953
static const AVOption options[]
URLContext * out2
static const AVClass ism_class
static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#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
#define fail()
Definition: checkasm.h:120
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
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:3975
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
AVDictionary * opts
Definition: movenc.c:50
int block_align
Audio only.
Definition: avcodec.h:4074
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
int64_t start_pos
#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:508
#define FFMIN(a, b)
Definition: common.h:96
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:466
const char * name
Definition: avformat.h:505
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1377
Stream structure.
Definition: avformat.h:881
const char * fourcc
int fragments_size
Definition: hdsenc.c:55
const char * stream_type_tag
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
Fragment ** fragments
Definition: hdsenc.c:56
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
static int64_t ism_seek(void *opaque, int64_t offset, int whence)
int64_t duration
Definition: hdsenc.c:41
void * buf
Definition: avisynth_c.h:766
Definition: url.h:38
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:591
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
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
int index
Definition: gxfenc.c:89
ff_const59 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:51
#define snprintf
Definition: snprintf.h:34
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4393
static int ism_write_trailer(AVFormatContext *s)
AVOutputFormat ff_smoothstreaming_muxer
#define flags(name, subs,...)
Definition: cbs_av1.c:561
int ffurl_close(URLContext *h)
Definition: avio.c:467
int sample_rate
Audio only.
Definition: avcodec.h:4067
int64_t bitrate
Definition: h264_levels.c:131
static int copy_moof(AVFormatContext *s, const char *infile, const char *outfile, int64_t size)
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:463
int64_t ffurl_seek(URLContext *h, int64_t pos, int whence)
Change the position that will be used by the next read/write operation on the resource accessed by h...
Definition: avio.c:434
static double c[64]
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set that converts the value to a string and stores it...
Definition: dict.c:147
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:148
#define av_free(p)
int len
void * priv_data
Format private data.
Definition: avformat.h:1386
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
int channels
Audio only.
Definition: avcodec.h:4063
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1476
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:1254
char * protocol_blacklist
&#39;,&#39; separated list of disallowed protocols.
Definition: avformat.h:1953
FILE * out
Definition: movenc.c:54
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
unbuffered private I/O API
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
static void get_private_data(OutputStream *os)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
AVIOContext * out
Definition: dashenc.c:81
int stream_index
Definition: avcodec.h:1479
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
#define MKTAG(a, b, c, d)
Definition: common.h:366
This structure stores compressed data.
Definition: avcodec.h:1454
char file[1024]
Definition: hdsenc.c:40
FILE * outfile
Definition: audiogen.c:96
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:191