Libav
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 Libav.
6  *
7  * Libav 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  * Libav 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 Libav; 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 "internal.h"
30 #include "os_support.h"
31 #include "avc.h"
32 #include "url.h"
33 #include "isom.h"
34 
35 #include "libavutil/opt.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/file.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/intreadwrite.h"
40 
41 typedef struct {
42  char file[1024];
43  char infofile[1024];
44  int64_t start_time, duration;
45  int n;
46  int64_t start_pos, size;
47 } Fragment;
48 
49 typedef struct {
50  AVFormatContext *ctx;
51  int ctx_inited;
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
57  int64_t tail_pos, cur_pos, cur_start_pos;
58  int packets_written;
59  const char *stream_type_tag;
60  int nb_fragments, fragments_size, fragment_index;
61  Fragment **fragments;
62 
63  const char *fourcc;
64  char *private_str;
66  int audio_tag;
67 } OutputStream;
68 
69 typedef struct {
70  const AVClass *class; /* Class for private options. */
77  int has_video, has_audio;
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  if (os->out) {
102  ffurl_close(os->out);
103  }
104  if (os->out2) {
105  ffurl_close(os->out2);
106  }
107  os->out = os->tail_out;
108  os->out2 = NULL;
109  os->tail_out = NULL;
110  }
111  if (offset >= os->cur_start_pos) {
112  if (os->out)
113  ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET);
114  os->cur_pos = offset;
115  return offset;
116  }
117  for (i = os->nb_fragments - 1; i >= 0; i--) {
118  Fragment *frag = os->fragments[i];
119  if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) {
120  int ret;
121  AVDictionary *opts = NULL;
122  os->tail_out = os->out;
123  av_dict_set(&opts, "truncate", "0", 0);
124  ret = ffurl_open(&os->out, frag->file, AVIO_FLAG_READ_WRITE, &os->ctx->interrupt_callback, &opts);
125  av_dict_free(&opts);
126  if (ret < 0) {
127  os->out = os->tail_out;
128  os->tail_out = NULL;
129  return ret;
130  }
131  av_dict_set(&opts, "truncate", "0", 0);
133  av_dict_free(&opts);
134  ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET);
135  if (os->out2)
136  ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET);
137  os->cur_pos = offset;
138  return offset;
139  }
140  }
141  return AVERROR(EIO);
142 }
143 
145 {
146  AVCodecContext *codec = os->ctx->streams[0]->codec;
147  uint8_t *ptr = codec->extradata;
148  int size = codec->extradata_size;
149  int i;
150  if (codec->codec_id == AV_CODEC_ID_H264) {
151  ff_avc_write_annexb_extradata(ptr, &ptr, &size);
152  if (!ptr)
153  ptr = codec->extradata;
154  }
155  if (!ptr)
156  return;
157  os->private_str = av_mallocz(2*size + 1);
158  if (!os->private_str)
159  goto fail;
160  for (i = 0; i < size; i++)
161  snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]);
162 fail:
163  if (ptr != codec->extradata)
164  av_free(ptr);
165 }
166 
167 static void ism_free(AVFormatContext *s)
168 {
170  int i, j;
171  if (!c->streams)
172  return;
173  for (i = 0; i < s->nb_streams; i++) {
174  OutputStream *os = &c->streams[i];
175  ffurl_close(os->out);
176  ffurl_close(os->out2);
177  ffurl_close(os->tail_out);
178  os->out = os->out2 = os->tail_out = NULL;
179  if (os->ctx && os->ctx_inited)
180  av_write_trailer(os->ctx);
181  if (os->ctx && os->ctx->pb)
182  av_free(os->ctx->pb);
183  if (os->ctx)
185  av_free(os->private_str);
186  for (j = 0; j < os->nb_fragments; j++)
187  av_free(os->fragments[j]);
188  av_free(os->fragments);
189  }
190  av_freep(&c->streams);
191 }
192 
193 static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
194 {
195  int removed = 0, i, start = 0;
196  if (os->nb_fragments <= 0)
197  return;
198  if (os->fragments[0]->n > 0)
199  removed = 1;
200  if (final)
201  skip = 0;
202  if (window_size)
203  start = FFMAX(os->nb_fragments - skip - window_size, 0);
204  for (i = start; i < os->nb_fragments - skip; i++) {
205  Fragment *frag = os->fragments[i];
206  if (!final || removed)
207  avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration);
208  else
209  avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration);
210  }
211 }
212 
213 static int write_manifest(AVFormatContext *s, int final)
214 {
216  AVIOContext *out;
217  char filename[1024], temp_filename[1024];
218  int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0;
219  int64_t duration = 0;
220 
221  snprintf(filename, sizeof(filename), "%s/Manifest", s->filename);
222  snprintf(temp_filename, sizeof(temp_filename), "%s/Manifest.tmp", s->filename);
223  ret = avio_open2(&out, temp_filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
224  if (ret < 0) {
225  av_log(s, AV_LOG_ERROR, "Unable to open %s for writing\n", temp_filename);
226  return ret;
227  }
228  avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
229  for (i = 0; i < s->nb_streams; i++) {
230  OutputStream *os = &c->streams[i];
231  if (os->nb_fragments > 0) {
232  Fragment *last = os->fragments[os->nb_fragments - 1];
233  duration = last->start_time + last->duration;
234  }
235  if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
236  video_chunks = os->nb_fragments;
237  video_streams++;
238  } else {
239  audio_chunks = os->nb_fragments;
240  audio_streams++;
241  }
242  }
243  if (!final) {
244  duration = 0;
245  video_chunks = audio_chunks = 0;
246  }
247  if (c->window_size) {
248  video_chunks = FFMIN(video_chunks, c->window_size);
249  audio_chunks = FFMIN(audio_chunks, c->window_size);
250  }
251  avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration);
252  if (!final)
253  avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count);
254  avio_printf(out, ">\n");
255  if (c->has_video) {
256  int last = -1, index = 0;
257  avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks);
258  for (i = 0; i < s->nb_streams; i++) {
259  OutputStream *os = &c->streams[i];
261  continue;
262  last = i;
263  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->width, s->streams[i]->codec->height, os->private_str);
264  index++;
265  }
266  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
267  avio_printf(out, "</StreamIndex>\n");
268  }
269  if (c->has_audio) {
270  int last = -1, index = 0;
271  avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks);
272  for (i = 0; i < s->nb_streams; i++) {
273  OutputStream *os = &c->streams[i];
275  continue;
276  last = i;
277  avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" BitsPerSample=\"16\" PacketSize=\"%d\" AudioTag=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->sample_rate, s->streams[i]->codec->channels, os->packet_size, os->audio_tag, os->private_str);
278  index++;
279  }
280  output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size);
281  avio_printf(out, "</StreamIndex>\n");
282  }
283  avio_printf(out, "</SmoothStreamingMedia>\n");
284  avio_flush(out);
285  avio_close(out);
286  return ff_rename(temp_filename, filename);
287 }
288 
290 {
292  int ret = 0, i;
293  AVOutputFormat *oformat;
294 
295  mkdir(s->filename, 0777);
296 
297  oformat = av_guess_format("ismv", NULL, NULL);
298  if (!oformat) {
300  goto fail;
301  }
302 
303  c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
304  if (!c->streams) {
305  ret = AVERROR(ENOMEM);
306  goto fail;
307  }
308 
309  for (i = 0; i < s->nb_streams; i++) {
310  OutputStream *os = &c->streams[i];
311  AVFormatContext *ctx;
312  AVStream *st;
313  AVDictionary *opts = NULL;
314  char buf[10];
315 
316  if (!s->streams[i]->codec->bit_rate) {
317  av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i);
318  ret = AVERROR(EINVAL);
319  goto fail;
320  }
321  snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%d)", s->filename, s->streams[i]->codec->bit_rate);
322  mkdir(os->dirname, 0777);
323 
324  ctx = avformat_alloc_context();
325  if (!ctx) {
326  ret = AVERROR(ENOMEM);
327  goto fail;
328  }
329  os->ctx = ctx;
330  ctx->oformat = oformat;
332 
333  if (!(st = avformat_new_stream(ctx, NULL))) {
334  ret = AVERROR(ENOMEM);
335  goto fail;
336  }
339 
340  ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek);
341  if (!ctx->pb) {
342  ret = AVERROR(ENOMEM);
343  goto fail;
344  }
345 
346  snprintf(buf, sizeof(buf), "%d", c->lookahead_count);
347  av_dict_set(&opts, "ism_lookahead", buf, 0);
348  av_dict_set(&opts, "movflags", "frag_custom", 0);
349  if ((ret = avformat_write_header(ctx, &opts)) < 0) {
350  goto fail;
351  }
352  os->ctx_inited = 1;
353  avio_flush(ctx->pb);
354  av_dict_free(&opts);
355  s->streams[i]->time_base = st->time_base;
356  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
357  c->has_video = 1;
358  os->stream_type_tag = "video";
359  if (st->codec->codec_id == AV_CODEC_ID_H264) {
360  os->fourcc = "H264";
361  } else if (st->codec->codec_id == AV_CODEC_ID_VC1) {
362  os->fourcc = "WVC1";
363  } else {
364  av_log(s, AV_LOG_ERROR, "Unsupported video codec\n");
365  ret = AVERROR(EINVAL);
366  goto fail;
367  }
368  } else {
369  c->has_audio = 1;
370  os->stream_type_tag = "audio";
371  if (st->codec->codec_id == AV_CODEC_ID_AAC) {
372  os->fourcc = "AACL";
373  os->audio_tag = 0xff;
374  } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
375  os->fourcc = "WMAP";
376  os->audio_tag = 0x0162;
377  } else {
378  av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n");
379  ret = AVERROR(EINVAL);
380  goto fail;
381  }
382  os->packet_size = st->codec->block_align ? st->codec->block_align : 4;
383  }
384  get_private_data(os);
385  }
386 
387  if (!c->has_video && c->min_frag_duration <= 0) {
388  av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n");
389  ret = AVERROR(EINVAL);
390  }
391  ret = write_manifest(s, 0);
392 
393 fail:
394  if (ret)
395  ism_free(s);
396  return ret;
397 }
398 
399 static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size)
400 {
401  AVIOContext *in;
402  int ret;
403  uint32_t len;
404  if ((ret = avio_open2(&in, filename, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0)
405  return ret;
406  ret = AVERROR(EIO);
407  *moof_size = avio_rb32(in);
408  if (*moof_size < 8 || *moof_size > size)
409  goto fail;
410  if (avio_rl32(in) != MKTAG('m','o','o','f'))
411  goto fail;
412  len = avio_rb32(in);
413  if (len > *moof_size)
414  goto fail;
415  if (avio_rl32(in) != MKTAG('m','f','h','d'))
416  goto fail;
417  avio_seek(in, len - 8, SEEK_CUR);
418  avio_rb32(in); /* traf size */
419  if (avio_rl32(in) != MKTAG('t','r','a','f'))
420  goto fail;
421  while (avio_tell(in) < *moof_size) {
422  uint32_t len = avio_rb32(in);
423  uint32_t tag = avio_rl32(in);
424  int64_t end = avio_tell(in) + len - 8;
425  if (len < 8 || len >= *moof_size)
426  goto fail;
427  if (tag == MKTAG('u','u','i','d')) {
428  const uint8_t tfxd[] = {
429  0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6,
430  0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2
431  };
432  uint8_t uuid[16];
433  avio_read(in, uuid, 16);
434  if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) {
435  avio_seek(in, 4, SEEK_CUR);
436  *start_ts = avio_rb64(in);
437  *duration = avio_rb64(in);
438  ret = 0;
439  break;
440  }
441  }
442  avio_seek(in, end, SEEK_SET);
443  }
444 fail:
445  avio_close(in);
446  return ret;
447 }
448 
449 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)
450 {
451  int err;
452  Fragment *frag;
453  if (os->nb_fragments >= os->fragments_size) {
454  os->fragments_size = (os->fragments_size + 1) * 2;
455  if ((err = av_reallocp(&os->fragments, sizeof(*os->fragments) *
456  os->fragments_size)) < 0) {
457  os->fragments_size = 0;
458  os->nb_fragments = 0;
459  return err;
460  }
461  }
462  frag = av_mallocz(sizeof(*frag));
463  if (!frag)
464  return AVERROR(ENOMEM);
465  av_strlcpy(frag->file, file, sizeof(frag->file));
466  av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile));
467  frag->start_time = start_time;
468  frag->duration = duration;
469  frag->start_pos = start_pos;
470  frag->size = size;
471  frag->n = os->fragment_index;
472  os->fragments[os->nb_fragments++] = frag;
473  os->fragment_index++;
474  return 0;
475 }
476 
477 static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size)
478 {
479  AVIOContext *in, *out;
480  int ret = 0;
481  if ((ret = avio_open2(&in, infile, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0)
482  return ret;
483  if ((ret = avio_open2(&out, outfile, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL)) < 0) {
484  avio_close(in);
485  return ret;
486  }
487  while (size > 0) {
488  uint8_t buf[8192];
489  int n = FFMIN(size, sizeof(buf));
490  n = avio_read(in, buf, n);
491  if (n <= 0) {
492  ret = AVERROR(EIO);
493  break;
494  }
495  avio_write(out, buf, n);
496  size -= n;
497  }
498  avio_flush(out);
499  avio_close(out);
500  avio_close(in);
501  return ret;
502 }
503 
504 static int ism_flush(AVFormatContext *s, int final)
505 {
507  int i, ret = 0;
508 
509  for (i = 0; i < s->nb_streams; i++) {
510  OutputStream *os = &c->streams[i];
511  char filename[1024], target_filename[1024], header_filename[1024];
512  int64_t start_pos = os->tail_pos, size;
513  int64_t start_ts, duration, moof_size;
514  if (!os->packets_written)
515  continue;
516 
517  snprintf(filename, sizeof(filename), "%s/temp", os->dirname);
518  ret = ffurl_open(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL);
519  if (ret < 0)
520  break;
521  os->cur_start_pos = os->tail_pos;
522  av_write_frame(os->ctx, NULL);
523  avio_flush(os->ctx->pb);
524  os->packets_written = 0;
525  if (!os->out || os->tail_out)
526  return AVERROR(EIO);
527 
528  ffurl_close(os->out);
529  os->out = NULL;
530  size = os->tail_pos - start_pos;
531  if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0)
532  break;
533  snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
534  snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
535  copy_moof(s, filename, header_filename, moof_size);
536  ret = ff_rename(filename, target_filename);
537  if (ret < 0)
538  break;
539  add_fragment(os, target_filename, header_filename, start_ts, duration,
540  os->cur_start_pos, size);
541  }
542 
543  if (c->window_size || (final && c->remove_at_exit)) {
544  for (i = 0; i < s->nb_streams; i++) {
545  OutputStream *os = &c->streams[i];
546  int j;
547  int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count;
548  if (final && c->remove_at_exit)
549  remove = os->nb_fragments;
550  if (remove > 0) {
551  for (j = 0; j < remove; j++) {
552  unlink(os->fragments[j]->file);
553  unlink(os->fragments[j]->infofile);
554  av_free(os->fragments[j]);
555  }
556  os->nb_fragments -= remove;
557  memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments));
558  }
559  if (final && c->remove_at_exit)
560  rmdir(os->dirname);
561  }
562  }
563 
564  if (ret >= 0)
565  ret = write_manifest(s, final);
566  return ret;
567 }
568 
570 {
572  AVStream *st = s->streams[pkt->stream_index];
573  OutputStream *os = &c->streams[pkt->stream_index];
574  int64_t end_dts = (c->nb_fragments + 1) * c->min_frag_duration;
575  int ret;
576 
577  if (st->first_dts == AV_NOPTS_VALUE)
578  st->first_dts = pkt->dts;
579 
580  if ((!c->has_video || st->codec->codec_type == AVMEDIA_TYPE_VIDEO) &&
581  av_compare_ts(pkt->dts - st->first_dts, st->time_base,
582  end_dts, AV_TIME_BASE_Q) >= 0 &&
583  pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) {
584 
585  if ((ret = ism_flush(s, 0)) < 0)
586  return ret;
587  c->nb_fragments++;
588  }
589 
590  os->packets_written++;
591  return ff_write_chained(os->ctx, 0, pkt, s);
592 }
593 
595 {
597  ism_flush(s, 1);
598 
599  if (c->remove_at_exit) {
600  char filename[1024];
601  snprintf(filename, sizeof(filename), "%s/Manifest", s->filename);
602  unlink(filename);
603  rmdir(s->filename);
604  }
605 
606  ism_free(s);
607  return 0;
608 }
609 
610 #define OFFSET(x) offsetof(SmoothStreamingContext, x)
611 #define E AV_OPT_FLAG_ENCODING_PARAM
612 static const AVOption options[] = {
613  { "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
614  { "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 },
615  { "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E },
616  { "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
617  { "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
618  { NULL },
619 };
620 
621 static const AVClass ism_class = {
622  .class_name = "smooth streaming muxer",
623  .item_name = av_default_item_name,
624  .option = options,
625  .version = LIBAVUTIL_VERSION_INT,
626 };
627 
628 
630  .name = "smoothstreaming",
631  .long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"),
632  .priv_data_size = sizeof(SmoothStreamingContext),
633  .audio_codec = AV_CODEC_ID_AAC,
634  .video_codec = AV_CODEC_ID_H264,
639  .codec_tag = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
640  .priv_class = &ism_class,
641 };
static int write_manifest(AVFormatContext *s, int final)
int nb_fragments
Definition: hdsenc.c:54
static int ism_flush(AVFormatContext *s, int final)
char infofile[1024]
int64_t first_dts
Definition: avformat.h:850
Bytestream IO Context.
Definition: avio.h:68
URLContext * tail_out
int size
int64_t start_time
Definition: hdsenc.c:40
AVIOInterruptCB interrupt_callback
Custom interrupt callbacks for the I/O layer.
Definition: avformat.h:1163
AVOption.
Definition: opt.h:234
static int ism_write(void *opaque, uint8_t *buf, int buf_size)
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:238
int av_write_frame(AVFormatContext *s, AVPacket *pkt)
Write a packet to an output media file.
Definition: mux.c:365
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
#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:276
static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size)
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: assenc.c:58
int n
Definition: hdsenc.c:41
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:769
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:186
#define AVIO_FLAG_READ
read-only
Definition: avio.h:292
#define AVIO_FLAG_WRITE
write-only
Definition: avio.h:293
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
URLContext * out
AVFormatContext * ctx
Definition: hdsenc.c:47
static void ism_free(AVFormatContext *s)
uint64_t packets_written
Definition: avconv.h:357
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
Definition: options.c:154
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1844
static int64_t duration
Definition: avplay.c:246
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
Format I/O context.
Definition: avformat.h:922
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:38
uint8_t
int fragment_index
Definition: hdsenc.c:54
AVOptions.
miscellaneous OS support macros and functions.
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:595
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)
char dirname[1024]
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
int ctx_inited
Definition: hdsenc.c:48
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
AVFormatContext * avformat_alloc_context(void)
Allocate an AVFormatContext.
Definition: options.c:98
Misc file utilities.
uint8_t iobuf[32768]
Definition: hdsenc.c:49
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size)
Definition: avc.c:164
int av_reallocp(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:140
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:660
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:165
static int write_trailer(AVFormatContext *s)
Definition: assenc.c:64
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:452
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:941
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1019
#define E
static int ff_rename(const char *oldpath, const char *newpath)
Wrap errno on rename() error.
Definition: internal.h:363
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:107
static int64_t start_time
Definition: avplay.c:245
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:564
#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:145
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:800
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:170
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_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
#define FFMAX(a, b)
Definition: common.h:55
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:81
const AVCodecTag ff_mp4_obj_type[]
Definition: isom.c:34
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:979
int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b)
Compare 2 timestamps each in its own timebases.
Definition: mathematics.c:134
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:978
int bit_rate
the average bitrate
Definition: avcodec.h:1114
int void avio_flush(AVIOContext *s)
Definition: aviobuf.c:180
int64_t start_pos
char filename[1024]
input or output filename
Definition: avformat.h:998
#define FFMIN(a, b)
Definition: common.h:57
int width
picture width / height.
Definition: avcodec.h:1229
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:415
const char * name
Definition: avformat.h:446
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:104
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
if(ac->has_optimized_func)
Stream structure.
Definition: avformat.h:699
const char * fourcc
int fragments_size
Definition: hdsenc.c:54
NULL
Definition: eval.c:55
const char * stream_type_tag
enum AVMediaType codec_type
Definition: avcodec.h:1058
Fragment ** fragments
Definition: hdsenc.c:55
enum AVCodecID codec_id
Definition: avcodec.h:1067
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:240
int sample_rate
samples per second
Definition: avcodec.h:1807
AVIOContext * pb
I/O context.
Definition: avformat.h:964
av_default_item_name
Definition: dnxhdenc.c:52
main external API structure.
Definition: avcodec.h:1050
static int64_t ism_seek(void *opaque, int64_t offset, int whence)
int64_t duration
Definition: hdsenc.c:40
Definition: url.h:41
int extradata_size
Definition: avcodec.h:1165
#define AVIO_FLAG_READ_WRITE
read-write pseudo flag
Definition: avio.h:294
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:68
Describe the class of an AVClass context structure.
Definition: log.h:33
AVIOContext * out
Definition: hdsenc.c:52
int index
Definition: gxfenc.c:72
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
Definition: aviobuf.c:783
void avformat_free_context(AVFormatContext *s)
Free an AVFormatContext and all its streams.
Definition: utils.c:2445
static int ism_write_trailer(AVFormatContext *s)
AVOutputFormat ff_smoothstreaming_muxer
int ffurl_close(URLContext *h)
Close the resource accessed by the URLContext h, and free the memory used by it.
Definition: avio.c:297
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
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:409
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:287
int ffurl_open(URLContext **puc, const char *filename, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create an URLContext for accessing to the resource indicated by url, and open it. ...
Definition: avio.c:211
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:628
int len
int channels
number of audio channels
Definition: avcodec.h:1808
void * priv_data
Format private data.
Definition: avformat.h:950
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:380
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:972
int av_write_trailer(AVFormatContext *s)
Write the stream trailer to an output media file and free the file private data.
Definition: mux.c:589
unbuffered private I/O API
#define AVERROR_MUXER_NOT_FOUND
Muxer not found.
Definition: error.h:55
static void get_private_data(OutputStream *os)
int stream_index
Definition: avcodec.h:975
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:741
#define MKTAG(a, b, c, d)
Definition: common.h:238
This structure stores compressed data.
Definition: avcodec.h:950
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
char file[1024]
Definition: hdsenc.c:39
FILE * outfile
Definition: audiogen.c:96
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2