FFmpeg  4.4.5
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];
46  int n;
48 } Fragment;
49 
50 typedef struct OutputStream {
52  char dirname[1024];
53  uint8_t iobuf[32768];
54  URLContext *out; // Current output stream where all output is written
55  URLContext *out2; // Auxiliary output stream where all output is also written
56  URLContext *tail_out; // The actual main output stream, if we're currently seeked back to write elsewhere
58  int packets_written;
59  const char *stream_type_tag;
62 
63  const char *fourcc;
64  char *private_str;
66  int audio_tag;
67 } OutputStream;
68 
69 typedef struct SmoothStreamingContext {
70  const AVClass *class; /* Class for private options. */
80 
81 static int ism_write(void *opaque, uint8_t *buf, int buf_size)
82 {
83  OutputStream *os = opaque;
84  if (os->out)
85  ffurl_write(os->out, buf, buf_size);
86  if (os->out2)
87  ffurl_write(os->out2, buf, buf_size);
88  os->cur_pos += buf_size;
89  if (os->cur_pos >= os->tail_pos)
90  os->tail_pos = os->cur_pos;
91  return buf_size;
92 }
93 
94 static int64_t ism_seek(void *opaque, int64_t offset, int whence)
95 {
96  OutputStream *os = opaque;
97  int i;
98  if (whence != SEEK_SET)
99  return AVERROR(ENOSYS);
100  if (os->tail_out) {
101  ffurl_closep(&os->out);
102  ffurl_closep(&os->out2);
103  os->out = os->tail_out;
104  os->tail_out = NULL;
105  }
106  if (offset >= os->cur_start_pos) {
107  if (os->out)
108  ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET);
109  os->cur_pos = offset;
110  return offset;
111  }
112  for (i = os->nb_fragments - 1; i >= 0; i--) {
113  Fragment *frag = os->fragments[i];
114  if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) {
115  int ret;
117  os->tail_out = os->out;
118  av_dict_set(&opts, "truncate", "0", 0);
119  ret = ffurl_open_whitelist(&os->out, frag->file, AVIO_FLAG_WRITE,
121  av_dict_free(&opts);
122  if (ret < 0) {
123  os->out = os->tail_out;
124  os->tail_out = NULL;
125  return ret;
126  }
127  av_dict_set(&opts, "truncate", "0", 0);
130  av_dict_free(&opts);
131  ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET);
132  if (os->out2)
133  ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET);
134  os->cur_pos = offset;
135  return offset;
136  }
137  }
138  return AVERROR(EIO);
139 }
140 
142 {
143  AVCodecParameters *par = os->ctx->streams[0]->codecpar;
144  uint8_t *ptr = par->extradata;
145  int size = par->extradata_size;
146  int i;
147  if (par->codec_id == AV_CODEC_ID_H264) {
148  ff_avc_write_annexb_extradata(ptr, &ptr, &size);
149  if (!ptr)
150  ptr = par->extradata;
151  }
152  if (!ptr)
153  return;
154  os->private_str = av_mallocz(2*size + 1);
155  if (!os->private_str)
156  goto fail;
157  for (i = 0; i < size; i++)
158  snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]);
159 fail:
160  if (ptr != par->extradata)
161  av_free(ptr);
162 }
163 
165 {
166  SmoothStreamingContext *c = s->priv_data;
167  int i, j;
168  if (!c->streams)
169  return;
170  for (i = 0; i < s->nb_streams; i++) {
171  OutputStream *os = &c->streams[i];
172  ffurl_closep(&os->out);
173  ffurl_closep(&os->out2);
174  ffurl_closep(&os->tail_out);
175  if (os->ctx && os->ctx->pb)
176  avio_context_free(&os->ctx->pb);
178  av_freep(&os->private_str);
179  for (j = 0; j < os->nb_fragments; j++)
180  av_freep(&os->fragments[j]);
181  av_freep(&os->fragments);
182  }
183  av_freep(&c->streams);
184 }
185 
186 static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
187 {
188  int removed = 0, i, start = 0;
189  if (os->nb_fragments <= 0)
190  return;
191  if (os->fragments[0]->n > 0)
192  removed = 1;
193  if (final)
194  skip = 0;
195  if (window_size)
196  start = FFMAX(os->nb_fragments - skip - window_size, 0);
197  for (i = start; i < os->nb_fragments - skip; i++) {
198  Fragment *frag = os->fragments[i];
199  if (!final || removed)
200  avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration);
201  else
202  avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration);
203  }
204 }
205 
206 static int write_manifest(AVFormatContext *s, int final)
207 {
208  SmoothStreamingContext *c = s->priv_data;
209  AVIOContext *out;
210  char filename[1024], temp_filename[1024];
211  int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0;
212  int64_t duration = 0;
213 
214  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
215  snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->url);
216  ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, NULL);
217  if (ret < 0) {
218  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
219  return ret;
220  }
221  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
222  for (i = 0; i < s->nb_streams; i++) {
223  OutputStream *os = &c->streams[i];
224  if (os->nb_fragments > 0) {
225  Fragment *last = os->fragments[os->nb_fragments - 1];
226  duration = last->start_time + last->duration;
227  }
228  if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
229  video_chunks = os->nb_fragments;
230  video_streams++;
231  } else {
232  audio_chunks = os->nb_fragments;
233  audio_streams++;
234  }
235  }
236  if (!final) {
237  duration = 0;
238  video_chunks = audio_chunks = 0;
239  }
240  if (c->window_size) {
241  video_chunks = FFMIN(video_chunks, c->window_size);
242  audio_chunks = FFMIN(audio_chunks, c->window_size);
243  }
244  avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration);
245  if (!final)
246  avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count);
247  avio_printf(out, ">\n");
248  if (c->has_video) {
249  int last = -1, index = 0;
250  avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks);
251  for (i = 0; i < s->nb_streams; i++) {
252  OutputStream *os = &c->streams[i];
253  if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
254  continue;
255  last = i;
256  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);
257  index++;
258  }
259  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
260  avio_printf(out, "</StreamIndex>\n");
261  }
262  if (c->has_audio) {
263  int last = -1, index = 0;
264  avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks);
265  for (i = 0; i < s->nb_streams; i++) {
266  OutputStream *os = &c->streams[i];
267  if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
268  continue;
269  last = i;
270  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);
271  index++;
272  }
273  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
274  avio_printf(out, "</StreamIndex>\n");
275  }
276  avio_printf(out, "</SmoothStreamingMedia>\n");
277  avio_flush(out);
279  return ff_rename(temp_filename, filename, s);
280 }
281 
283 {
284  SmoothStreamingContext *c = s->priv_data;
285  int ret = 0, i;
286  ff_const59 AVOutputFormat *oformat;
287 
288  if (mkdir(s->url, 0777) == -1 && errno != EEXIST) {
289  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
290  return AVERROR(errno);
291  }
292 
293  oformat = av_guess_format("ismv", NULL, NULL);
294  if (!oformat) {
296  }
297 
298  c->streams = av_mallocz_array(s->nb_streams, sizeof(*c->streams));
299  if (!c->streams) {
300  return AVERROR(ENOMEM);
301  }
302 
303  for (i = 0; i < s->nb_streams; i++) {
304  OutputStream *os = &c->streams[i];
306  AVStream *st;
308 
309  if (!s->streams[i]->codecpar->bit_rate) {
310  av_log(s, AV_LOG_WARNING, "No bit rate set for stream %d\n", i);
311  // create a tmp name for the directory of fragments
312  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(Tmp_%d)", s->url, i);
313  } else {
314  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
315  }
316 
317  if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
318  av_log(s, AV_LOG_ERROR, "mkdir failed\n");
319  return AVERROR(errno);
320  }
321 
322  os->ctx = ctx = avformat_alloc_context();
323  if (!ctx) {
324  return AVERROR(ENOMEM);
325  }
326  if ((ret = ff_copy_whiteblacklists(ctx, s)) < 0)
327  return ret;
328  ctx->oformat = oformat;
329  ctx->interrupt_callback = s->interrupt_callback;
330 
331  if (!(st = avformat_new_stream(ctx, NULL))) {
332  return AVERROR(ENOMEM);
333  }
334  avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
335  st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
336  st->time_base = s->streams[i]->time_base;
337 
339  if (!ctx->pb) {
340  return AVERROR(ENOMEM);
341  }
342 
343  av_dict_set_int(&opts, "ism_lookahead", c->lookahead_count, 0);
344  av_dict_set(&opts, "movflags", "frag_custom", 0);
345  ret = avformat_write_header(ctx, &opts);
346  av_dict_free(&opts);
347  if (ret < 0) {
348  return ret;
349  }
350  avio_flush(ctx->pb);
351  s->streams[i]->time_base = st->time_base;
352  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
353  c->has_video = 1;
354  os->stream_type_tag = "video";
355  if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
356  os->fourcc = "H264";
357  } else if (st->codecpar->codec_id == AV_CODEC_ID_VC1) {
358  os->fourcc = "WVC1";
359  } else {
360  av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
361  return AVERROR(EINVAL);
362  }
363  } else {
364  c->has_audio = 1;
365  os->stream_type_tag = "audio";
366  if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
367  os->fourcc = "AACL";
368  os->audio_tag = 0xff;
369  } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
370  os->fourcc = "WMAP";
371  os->audio_tag = 0x0162;
372  } else {
373  av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
374  return AVERROR(EINVAL);
375  }
376  os->packet_size = st->codecpar->block_align ? st->codecpar->block_align : 4;
377  }
378  get_private_data(os);
379  }
380 
381  if (!c->has_video && c->min_frag_duration <= 0) {
382  av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
383  return AVERROR(EINVAL);
384  }
385  ret = write_manifest(s, 0);
386  if (ret < 0)
387  return ret;
388 
389  return 0;
390 }
391 
392 static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
393 {
394  AVIOContext *in;
395  int ret;
396  uint32_t len;
397  if ((ret = s->io_open(s, &in, filename, AVIO_FLAG_READ, NULL)) < 0)
398  return ret;
399  ret = AVERROR(EIO);
400  *moof_size = avio_rb32(in);
401  if (*moof_size < 8 || *moof_size > size)
402  goto fail;
403  if (avio_rl32(in) != MKTAG('m','o','o','f'))
404  goto fail;
405  len = avio_rb32(in);
406  if (len > *moof_size)
407  goto fail;
408  if (avio_rl32(in) != MKTAG('m','f','h','d'))
409  goto fail;
410  avio_seek(in, len - 8, SEEK_CUR);
411  avio_rb32(in); /* traf size */
412  if (avio_rl32(in) != MKTAG('t','r','a','f'))
413  goto fail;
414  while (avio_tell(in) < *moof_size) {
415  uint32_t len = avio_rb32(in);
416  uint32_t tag = avio_rl32(in);
417  int64_t end = avio_tell(in) + len - 8;
418  if (len < 8 || len >= *moof_size)
419  goto fail;
420  if (tag == MKTAG('u','u','i','d')) {
421  static const uint8_t tfxd[] = {
422  0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
423  0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
424  };
425  uint8_t uuid[16];
426  avio_read(in, uuid, 16);
427  if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
428  avio_seek(in, 4, SEEK_CUR);
429  *start_ts = avio_rb64(in);
430  *duration = avio_rb64(in);
431  ret = 0;
432  break;
433  }
434  }
435  avio_seek(in, end, SEEK_SET);
436  }
437 fail:
439  return ret;
440 }
441 
442 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)
443 {
444  int err;
445  Fragment *frag;
446  if (os->nb_fragments >= os->fragments_size) {
447  os->fragments_size = (os->fragments_size + 1) * 2;
448  if ((err = av_reallocp_array(&os->fragments, sizeof(*os->fragments),
449  os->fragments_size)) < 0) {
450  os->fragments_size = 0;
451  os->nb_fragments = 0;
452  return err;
453  }
454  }
455  frag = av_mallocz(sizeof(*frag));
456  if (!frag)
457  return AVERROR(ENOMEM);
458  av_strlcpy(frag->file, file, sizeof(frag->file));
459  av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
460  frag->start_time = start_time;
461  frag->duration = duration;
462  frag->start_pos = start_pos;
463  frag->size = size;
464  frag->n = os->fragment_index;
465  os->fragments[os->nb_fragments++] = frag;
466  os->fragment_index++;
467  return 0;
468 }
469 
470 static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
471 {
472  AVIOContext *in, *out;
473  int ret = 0;
474  if ((ret = s->io_open(s, &in, infile, AVIO_FLAG_READ, NULL)) < 0)
475  return ret;
476  if ((ret = s->io_open(s, &out, outfile, AVIO_FLAG_WRITE, NULL)) < 0) {
478  return ret;
479  }
480  while (size > 0) {
481  uint8_t buf[8192];
482  int n = FFMIN(size, sizeof(buf));
483  n = avio_read(in, buf, n);
484  if (n <= 0) {
485  ret = AVERROR(EIO);
486  break;
487  }
488  avio_write(out, buf, n);
489  size -= n;
490  }
491  avio_flush(out);
494  return ret;
495 }
496 
497 static int ism_flush(AVFormatContext *s, int final)
498 {
499  SmoothStreamingContext *c = s->priv_data;
500  int i, ret = 0;
501 
502  for (i = 0; i < s->nb_streams; i++) {
503  OutputStream *os = &c->streams[i];
504  char filename[1024], target_filename[1024], header_filename[1024], curr_dirname[1024];
505  int64_t size;
506  int64_t start_ts, duration, moof_size;
507  if (!os->packets_written)
508  continue;
509 
510  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
511  ret = ffurl_open_whitelist(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL, s->protocol_whitelist, s->protocol_blacklist, NULL);
512  if (ret < 0)
513  break;
514  os->cur_start_pos = os->tail_pos;
515  av_write_frame(os->ctx, NULL);
516  avio_flush(os->ctx->pb);
517  os->packets_written = 0;
518  if (!os->out || os->tail_out)
519  return AVERROR(EIO);
520 
521  ffurl_closep(&os->out);
522  size = os->tail_pos - os->cur_start_pos;
523  if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
524  break;
525 
526  if (!s->streams[i]->codecpar->bit_rate) {
527  int64_t bitrate = (int64_t) size * 8 * AV_TIME_BASE / av_rescale_q(duration, s->streams[i]->time_base, AV_TIME_BASE_Q);
528  if (!bitrate) {
529  av_log(s, AV_LOG_ERROR, "calculating bitrate got zero.\n");
530  ret = AVERROR(EINVAL);
531  return ret;
532  }
533 
534  av_log(s, AV_LOG_DEBUG, "calculated bitrate: %"PRId64"\n", bitrate);
535  s->streams[i]->codecpar->bit_rate = bitrate;
536  memcpy(curr_dirname, os->dirname, sizeof(os->dirname));
537  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
538  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
539 
540  // rename the tmp folder back to the correct name since we now have the bitrate
541  if ((ret = ff_rename((const char*)curr_dirname, os->dirname, s)) < 0)
542  return ret;
543  }
544 
545  snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
546  snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
547  copy_moof(s, filename, header_filename, moof_size);
548  ret = ff_rename(filename, target_filename, s);
549  if (ret < 0)
550  break;
551  add_fragment(os, target_filename, header_filename, start_ts, duration,
552  os->cur_start_pos, size);
553  }
554 
555  if (c->window_size || (final && c->remove_at_exit)) {
556  for (i = 0; i < s->nb_streams; i++) {
557  OutputStream *os = &c->streams[i];
558  int j;
559  int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
560  if (final && c->remove_at_exit)
561  remove = os->nb_fragments;
562  if (remove > 0) {
563  for (j = 0; j < remove; j++) {
564  unlink(os->fragments[j]->file);
565  unlink(os->fragments[j]->infofile);
566  av_freep(&os->fragments[j]);
567  }
568  os->nb_fragments -= remove;
569  memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
570  }
571  if (final && c->remove_at_exit)
572  rmdir(os->dirname);
573  }
574  }
575 
576  if (ret >= 0)
577  ret = write_manifest(s, final);
578  return ret;
579 }
580 
582 {
583  SmoothStreamingContext *c = s->priv_data;
584  AVStream *st = s->streams[pkt->stream_index];
585  OutputStream *os = &c->streams[pkt->stream_index];
586  int64_t end_dts = (c->nb_fragments + 1) * (int64_t) c->min_frag_duration;
587  int ret;
588 
589  if (st->first_dts == AV_NOPTS_VALUE)
590  st->first_dts = pkt->dts;
591 
592  if ((!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
594  end_dts, AV_TIME_BASE_Q) >= 0 &&
596 
597  if ((ret = ism_flush(s, 0)) < 0)
598  return ret;
599  c->nb_fragments++;
600  }
601 
602  os->packets_written++;
603  return ff_write_chained(os->ctx, 0, pkt, s, 0);
604 }
605 
607 {
608  SmoothStreamingContext *c = s->priv_data;
609  ism_flush(s, 1);
610 
611  if (c->remove_at_exit) {
612  char filename[1024];
613  snprintf(filename, sizeof(filename), "%s/Manifest", s->url);
614  unlink(filename);
615  rmdir(s->url);
616  }
617 
618  return 0;
619 }
620 
621 #define OFFSET(x) offsetof(SmoothStreamingContext, x)
622 #define E AV_OPT_FLAG_ENCODING_PARAM
623 static const AVOption options[] = {
624  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
625  { "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 },
626  { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
627  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
628  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
629  { NULL },
630 };
631 
632 static const AVClass ism_class = {
633  .class_name = "smooth streaming muxer",
634  .item_name = av_default_item_name,
635  .option = options,
636  .version = LIBAVUTIL_VERSION_INT,
637 };
638 
639 
641  .name = "smoothstreaming",
642  .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
643  .priv_data_size = sizeof(SmoothStreamingContext),
644  .audio_codec = AV_CODEC_ID_AAC,
645  .video_codec = AV_CODEC_ID_H264,
650  .deinit = ism_free,
651  .priv_class = &ism_class,
652 };
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)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
FILE * outfile
Definition: audiogen.c:96
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
Definition: avc.c:221
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:458
#define ff_const59
The ff_const59 define is not part of the public API and will be removed without further warning.
Definition: avformat.h:533
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:461
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:309
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:431
int ffurl_closep(URLContext **hh)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:441
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:418
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap avpriv_io_move and log if error happens.
Definition: avio.c:668
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:902
#define AVIO_FLAG_READ
read-only
Definition: avio.h:674
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:675
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
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:138
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:155
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:245
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define fail()
Definition: checkasm.h:133
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
Definition: codec_par.c:72
#define FFMIN(a, b)
Definition: common.h:105
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:730
static int64_t start_time
Definition: ffplay.c:332
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
Misc file utilities.
@ AV_OPT_TYPE_INT64
Definition: opt.h:226
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_CODEC_ID_H264
Definition: codec_id.h:76
@ AV_CODEC_ID_VC1
Definition: codec_id.h:119
@ AV_CODEC_ID_AAC
Definition: codec_id.h:426
@ AV_CODEC_ID_WMAPRO
Definition: codec_id.h:461
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:4436
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:211
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
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:506
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
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:1212
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values.
Definition: dict.c:203
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
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
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:60
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
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
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
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:206
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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 AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int index
Definition: gxfenc.c:89
int i
Definition: input.c:407
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:160
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:1328
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5692
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
uint32_t tag
Definition: movenc.c:1611
AVOptions.
miscellaneous OS support macros and functions.
#define E
static const AVClass ism_class
static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
static const AVOption options[]
static int copy_moof(AVFormatContext *s, const char *infile, const char *outfile, int64_t size)
static int ism_flush(AVFormatContext *s, int final)
static int ism_write_packet(AVFormatContext *s, AVPacket *pkt)
static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
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 int ism_write(void *opaque, uint8_t *buf, int buf_size)
static void get_private_data(OutputStream *os)
#define OFFSET(x)
static int64_t ism_seek(void *opaque, int64_t offset, int whence)
static void ism_free(AVFormatContext *s)
static int ism_write_trailer(AVFormatContext *s)
static int write_manifest(AVFormatContext *s, int final)
AVOutputFormat ff_smoothstreaming_muxer
static int ism_write_header(AVFormatContext *s)
#define snprintf
Definition: snprintf.h:34
Describe the class of an AVClass context structure.
Definition: log.h:67
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
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int block_align
Audio only.
Definition: codec_par.h:177
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
Format I/O context.
Definition: avformat.h:1232
AVIOContext * pb
I/O context.
Definition: avformat.h:1274
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1512
ff_const59 struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1251
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
char * protocol_whitelist
',' separated list of allowed protocols.
Definition: avformat.h:1806
char * protocol_blacklist
',' separated list of disallowed protocols.
Definition: avformat.h:1841
Bytestream IO Context.
Definition: avio.h:161
AVOption.
Definition: opt.h:248
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: avformat.h:1065
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:935
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
char infofile[1024]
int64_t duration
Definition: hdsenc.c:41
int64_t start_time
Definition: hdsenc.c:41
char file[1024]
Definition: hdsenc.c:40
int n
Definition: hdsenc.c:42
int64_t start_pos
char dirname[1024]
const char * fourcc
Fragment ** fragments
Definition: hdsenc.c:56
uint64_t packets_written
Definition: ffmpeg.h:546
URLContext * out
uint8_t iobuf[32768]
Definition: hdsenc.c:50
AVFormatContext * ctx
Definition: dashenc.c:100
AVIOContext * out
Definition: dashenc.c:102
URLContext * tail_out
const char * stream_type_tag
int nb_fragments
Definition: hdsenc.c:55
int fragments_size
Definition: hdsenc.c:55
URLContext * out2
int fragment_index
Definition: hdsenc.c:55
Definition: url.h:38
#define av_free(p)
#define av_freep(p)
#define av_log(a,...)
int64_t bitrate
Definition: h264_levels.c:131
FILE * out
Definition: movenc.c:54
int64_t duration
Definition: movenc.c:64
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
AVDictionary * opts
Definition: movenc.c:50
int size
unbuffered private I/O API
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len
static double c[64]