Libav
ismindex.c
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1 /*
2  * Copyright (c) 2012 Martin Storsjo
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /*
22  * To create a simple file for smooth streaming:
23  * avconv <normal input/transcoding options> -movflags frag_keyframe foo.ismv
24  * ismindex -n foo foo.ismv
25  * This step creates foo.ism and foo.ismc that is required by IIS for
26  * serving it.
27  *
28  * To pre-split files for serving as static files by a web server without
29  * any extra server support, create the ismv file as above, and split it:
30  * ismindex -split foo.ismv
31  * This step creates a file Manifest and directories QualityLevel(...),
32  * that can be read directly by a smooth streaming player.
33  */
34 
35 #include <stdio.h>
36 #include <string.h>
37 
38 #include "libavformat/avformat.h"
39 #include "libavformat/os_support.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/mathematics.h"
42 
43 static int usage(const char *argv0, int ret)
44 {
45  fprintf(stderr, "%s [-split] [-n basename] file1 [file2] ...\n", argv0);
46  return ret;
47 }
48 
49 struct MoofOffset {
50  int64_t time;
51  int64_t offset;
52  int64_t duration;
53 };
54 
55 struct Track {
56  const char *name;
57  int64_t duration;
58  int bitrate;
59  int track_id;
61  int width, height;
62  int chunks;
67  int timescale;
68  const char *fourcc;
69  int blocksize;
70  int tag;
71 };
72 
73 struct Tracks {
74  int nb_tracks;
75  int64_t duration;
76  struct Track **tracks;
79 };
80 
81 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
82 {
83  int32_t size, tag;
84 
85  size = avio_rb32(in);
86  tag = avio_rb32(in);
87  avio_wb32(out, size);
88  avio_wb32(out, tag);
89  if (tag != tag_name)
90  return -1;
91  size -= 8;
92  while (size > 0) {
93  char buf[1024];
94  int len = FFMIN(sizeof(buf), size);
95  if (avio_read(in, buf, len) != len)
96  break;
97  avio_write(out, buf, len);
98  size -= len;
99  }
100  return 0;
101 }
102 
103 static int write_fragment(const char *filename, AVIOContext *in)
104 {
105  AVIOContext *out = NULL;
106  int ret;
107 
108  if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0)
109  return ret;
110  copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
111  copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
112 
113  avio_flush(out);
114  avio_close(out);
115 
116  return ret;
117 }
118 
119 static int write_fragments(struct Tracks *tracks, int start_index,
120  AVIOContext *in)
121 {
122  char dirname[100], filename[500];
123  int i, j;
124 
125  for (i = start_index; i < tracks->nb_tracks; i++) {
126  struct Track *track = tracks->tracks[i];
127  const char *type = track->is_video ? "video" : "audio";
128  snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
129  mkdir(dirname, 0777);
130  for (j = 0; j < track->chunks; j++) {
131  snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
132  dirname, type, track->offsets[j].time);
133  avio_seek(in, track->offsets[j].offset, SEEK_SET);
134  write_fragment(filename, in);
135  }
136  }
137  return 0;
138 }
139 
140 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
141 {
142  int ret = AVERROR_EOF, track_id;
143  int version, fieldlength, i, j;
144  int64_t pos = avio_tell(f);
145  uint32_t size = avio_rb32(f);
146  struct Track *track = NULL;
147 
148  if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
149  goto fail;
150  version = avio_r8(f);
151  avio_rb24(f);
152  track_id = avio_rb32(f); /* track id */
153  for (i = start_index; i < tracks->nb_tracks && !track; i++)
154  if (tracks->tracks[i]->track_id == track_id)
155  track = tracks->tracks[i];
156  if (!track) {
157  /* Ok, continue parsing the next atom */
158  ret = 0;
159  goto fail;
160  }
161  fieldlength = avio_rb32(f);
162  track->chunks = avio_rb32(f);
163  track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks);
164  if (!track->offsets) {
165  ret = AVERROR(ENOMEM);
166  goto fail;
167  }
168  for (i = 0; i < track->chunks; i++) {
169  if (version == 1) {
170  track->offsets[i].time = avio_rb64(f);
171  track->offsets[i].offset = avio_rb64(f);
172  } else {
173  track->offsets[i].time = avio_rb32(f);
174  track->offsets[i].offset = avio_rb32(f);
175  }
176  for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
177  avio_r8(f);
178  for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
179  avio_r8(f);
180  for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
181  avio_r8(f);
182  if (i > 0)
183  track->offsets[i - 1].duration = track->offsets[i].time -
184  track->offsets[i - 1].time;
185  }
186  if (track->chunks > 0)
187  track->offsets[track->chunks - 1].duration = track->duration -
188  track->offsets[track->chunks - 1].time;
189  ret = 0;
190 
191 fail:
192  avio_seek(f, pos + size, SEEK_SET);
193  return ret;
194 }
195 
196 static int read_mfra(struct Tracks *tracks, int start_index,
197  const char *file, int split)
198 {
199  int err = 0;
200  AVIOContext *f = NULL;
201  int32_t mfra_size;
202 
203  if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
204  goto fail;
205  avio_seek(f, avio_size(f) - 4, SEEK_SET);
206  mfra_size = avio_rb32(f);
207  avio_seek(f, -mfra_size, SEEK_CUR);
208  if (avio_rb32(f) != mfra_size) {
209  err = AVERROR_INVALIDDATA;
210  goto fail;
211  }
212  if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
213  err = AVERROR_INVALIDDATA;
214  goto fail;
215  }
216  while (!read_tfra(tracks, start_index, f)) {
217  /* Empty */
218  }
219 
220  if (split)
221  write_fragments(tracks, start_index, f);
222 
223 fail:
224  if (f)
225  avio_close(f);
226  if (err)
227  fprintf(stderr, "Unable to read the MFRA atom in %s\n", file);
228  return err;
229 }
230 
231 static int get_private_data(struct Track *track, AVCodecContext *codec)
232 {
233  track->codec_private_size = codec->extradata_size;
234  track->codec_private = av_mallocz(codec->extradata_size);
235  if (!track->codec_private)
236  return AVERROR(ENOMEM);
237  memcpy(track->codec_private, codec->extradata, codec->extradata_size);
238  return 0;
239 }
240 
241 static int get_video_private_data(struct Track *track, AVCodecContext *codec)
242 {
243  AVIOContext *io = NULL;
244  uint16_t sps_size, pps_size;
245  int err = AVERROR(EINVAL);
246 
247  if (codec->codec_id == AV_CODEC_ID_VC1)
248  return get_private_data(track, codec);
249 
250  avio_open_dyn_buf(&io);
251  if (codec->extradata_size < 11 || codec->extradata[0] != 1)
252  goto fail;
253  sps_size = AV_RB16(&codec->extradata[6]);
254  if (11 + sps_size > codec->extradata_size)
255  goto fail;
256  avio_wb32(io, 0x00000001);
257  avio_write(io, &codec->extradata[8], sps_size);
258  pps_size = AV_RB16(&codec->extradata[9 + sps_size]);
259  if (11 + sps_size + pps_size > codec->extradata_size)
260  goto fail;
261  avio_wb32(io, 0x00000001);
262  avio_write(io, &codec->extradata[11 + sps_size], pps_size);
263  err = 0;
264 
265 fail:
267  return err;
268 }
269 
270 static int handle_file(struct Tracks *tracks, const char *file, int split)
271 {
272  AVFormatContext *ctx = NULL;
273  int err = 0, i, orig_tracks = tracks->nb_tracks;
274  char errbuf[50], *ptr;
275  struct Track *track;
276 
277  err = avformat_open_input(&ctx, file, NULL, NULL);
278  if (err < 0) {
279  av_strerror(err, errbuf, sizeof(errbuf));
280  fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
281  return 1;
282  }
283 
284  err = avformat_find_stream_info(ctx, NULL);
285  if (err < 0) {
286  av_strerror(err, errbuf, sizeof(errbuf));
287  fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
288  goto fail;
289  }
290 
291  if (ctx->nb_streams < 1) {
292  fprintf(stderr, "No streams found in %s\n", file);
293  goto fail;
294  }
295 
296  for (i = 0; i < ctx->nb_streams; i++) {
297  struct Track **temp;
298  AVStream *st = ctx->streams[i];
299  track = av_mallocz(sizeof(*track));
300  if (!track) {
301  err = AVERROR(ENOMEM);
302  goto fail;
303  }
304  temp = av_realloc(tracks->tracks,
305  sizeof(*tracks->tracks) * (tracks->nb_tracks + 1));
306  if (!temp) {
307  av_free(track);
308  err = AVERROR(ENOMEM);
309  goto fail;
310  }
311  tracks->tracks = temp;
312  tracks->tracks[tracks->nb_tracks] = track;
313 
314  track->name = file;
315  if ((ptr = strrchr(file, '/')) != NULL)
316  track->name = ptr + 1;
317 
318  track->bitrate = st->codec->bit_rate;
319  track->track_id = st->id;
320  track->timescale = st->time_base.den;
321  track->duration = st->duration;
322  track->is_audio = st->codec->codec_type == AVMEDIA_TYPE_AUDIO;
323  track->is_video = st->codec->codec_type == AVMEDIA_TYPE_VIDEO;
324 
325  if (!track->is_audio && !track->is_video) {
326  fprintf(stderr,
327  "Track %d in %s is neither video nor audio, skipping\n",
328  track->track_id, file);
329  av_freep(&tracks->tracks[tracks->nb_tracks]);
330  continue;
331  }
332 
333  tracks->duration = FFMAX(tracks->duration,
335  track->timescale, AV_ROUND_UP));
336 
337  if (track->is_audio) {
338  if (tracks->audio_track < 0)
339  tracks->audio_track = tracks->nb_tracks;
340  tracks->nb_audio_tracks++;
341  track->channels = st->codec->channels;
342  track->sample_rate = st->codec->sample_rate;
343  if (st->codec->codec_id == AV_CODEC_ID_AAC) {
344  track->fourcc = "AACL";
345  track->tag = 255;
346  track->blocksize = 4;
347  } else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) {
348  track->fourcc = "WMAP";
349  track->tag = st->codec->codec_tag;
350  track->blocksize = st->codec->block_align;
351  }
352  get_private_data(track, st->codec);
353  }
354  if (track->is_video) {
355  if (tracks->video_track < 0)
356  tracks->video_track = tracks->nb_tracks;
357  tracks->nb_video_tracks++;
358  track->width = st->codec->width;
359  track->height = st->codec->height;
360  if (st->codec->codec_id == AV_CODEC_ID_H264)
361  track->fourcc = "H264";
362  else if (st->codec->codec_id == AV_CODEC_ID_VC1)
363  track->fourcc = "WVC1";
364  get_video_private_data(track, st->codec);
365  }
366 
367  tracks->nb_tracks++;
368  }
369 
370  avformat_close_input(&ctx);
371 
372  err = read_mfra(tracks, orig_tracks, file, split);
373 
374 fail:
375  if (ctx)
376  avformat_close_input(&ctx);
377  return err;
378 }
379 
380 static void output_server_manifest(struct Tracks *tracks,
381  const char *basename)
382 {
383  char filename[1000];
384  FILE *out;
385  int i;
386 
387  snprintf(filename, sizeof(filename), "%s.ism", basename);
388  out = fopen(filename, "w");
389  if (!out) {
390  perror(filename);
391  return;
392  }
393  fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
394  fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
395  fprintf(out, "\t<head>\n");
396  fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
397  "content=\"%s.ismc\" />\n", basename);
398  fprintf(out, "\t</head>\n");
399  fprintf(out, "\t<body>\n");
400  fprintf(out, "\t\t<switch>\n");
401  for (i = 0; i < tracks->nb_tracks; i++) {
402  struct Track *track = tracks->tracks[i];
403  const char *type = track->is_video ? "video" : "audio";
404  fprintf(out, "\t\t\t<%s src=\"%s\" systemBitrate=\"%d\">\n",
405  type, track->name, track->bitrate);
406  fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
407  "valueType=\"data\" />\n", track->track_id);
408  fprintf(out, "\t\t\t</%s>\n", type);
409  }
410  fprintf(out, "\t\t</switch>\n");
411  fprintf(out, "\t</body>\n");
412  fprintf(out, "</smil>\n");
413  fclose(out);
414 }
415 
416 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
417  const char *type)
418 {
419  int i, j;
420  struct Track *track = tracks->tracks[main];
421  for (i = 0; i < track->chunks; i++) {
422  for (j = main + 1; j < tracks->nb_tracks; j++) {
423  if (tracks->tracks[j]->is_audio == track->is_audio &&
424  track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration)
425  fprintf(stderr, "Mismatched duration of %s chunk %d in %s and %s\n",
426  type, i, track->name, tracks->tracks[j]->name);
427  }
428  fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" />\n",
429  i, track->offsets[i].duration);
430  }
431 }
432 
433 static void output_client_manifest(struct Tracks *tracks,
434  const char *basename, int split)
435 {
436  char filename[1000];
437  FILE *out;
438  int i, j;
439 
440  if (split)
441  snprintf(filename, sizeof(filename), "Manifest");
442  else
443  snprintf(filename, sizeof(filename), "%s.ismc", basename);
444  out = fopen(filename, "w");
445  if (!out) {
446  perror(filename);
447  return;
448  }
449  fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
450  fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
451  "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
452  if (tracks->video_track >= 0) {
453  struct Track *track = tracks->tracks[tracks->video_track];
454  struct Track *first_track = track;
455  int index = 0;
456  fprintf(out,
457  "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
458  "Chunks=\"%d\" "
459  "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
460  tracks->nb_video_tracks, track->chunks);
461  for (i = 0; i < tracks->nb_tracks; i++) {
462  track = tracks->tracks[i];
463  if (!track->is_video)
464  continue;
465  fprintf(out,
466  "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
467  "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
468  "CodecPrivateData=\"",
469  index, track->bitrate, track->fourcc, track->width, track->height);
470  for (j = 0; j < track->codec_private_size; j++)
471  fprintf(out, "%02X", track->codec_private[j]);
472  fprintf(out, "\" />\n");
473  index++;
474  if (track->chunks != first_track->chunks)
475  fprintf(stderr, "Mismatched number of video chunks in %s and %s\n",
476  track->name, first_track->name);
477  }
478  print_track_chunks(out, tracks, tracks->video_track, "video");
479  fprintf(out, "\t</StreamIndex>\n");
480  }
481  if (tracks->audio_track >= 0) {
482  struct Track *track = tracks->tracks[tracks->audio_track];
483  struct Track *first_track = track;
484  int index = 0;
485  fprintf(out,
486  "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
487  "Chunks=\"%d\" "
488  "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
489  tracks->nb_audio_tracks, track->chunks);
490  for (i = 0; i < tracks->nb_tracks; i++) {
491  track = tracks->tracks[i];
492  if (!track->is_audio)
493  continue;
494  fprintf(out,
495  "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
496  "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
497  "BitsPerSample=\"16\" PacketSize=\"%d\" "
498  "AudioTag=\"%d\" CodecPrivateData=\"",
499  index, track->bitrate, track->fourcc, track->sample_rate,
500  track->channels, track->blocksize, track->tag);
501  for (j = 0; j < track->codec_private_size; j++)
502  fprintf(out, "%02X", track->codec_private[j]);
503  fprintf(out, "\" />\n");
504  index++;
505  if (track->chunks != first_track->chunks)
506  fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
507  track->name, first_track->name);
508  }
509  print_track_chunks(out, tracks, tracks->audio_track, "audio");
510  fprintf(out, "\t</StreamIndex>\n");
511  }
512  fprintf(out, "</SmoothStreamingMedia>\n");
513  fclose(out);
514 }
515 
516 static void clean_tracks(struct Tracks *tracks)
517 {
518  int i;
519  for (i = 0; i < tracks->nb_tracks; i++) {
520  av_freep(&tracks->tracks[i]->codec_private);
521  av_freep(&tracks->tracks[i]->offsets);
522  av_freep(&tracks->tracks[i]);
523  }
524  av_freep(&tracks->tracks);
525  tracks->nb_tracks = 0;
526 }
527 
528 int main(int argc, char **argv)
529 {
530  const char *basename = NULL;
531  int split = 0, i;
532  struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
533 
534  av_register_all();
535 
536  for (i = 1; i < argc; i++) {
537  if (!strcmp(argv[i], "-n")) {
538  basename = argv[i + 1];
539  i++;
540  } else if (!strcmp(argv[i], "-split")) {
541  split = 1;
542  } else if (argv[i][0] == '-') {
543  return usage(argv[0], 1);
544  } else {
545  if (handle_file(&tracks, argv[i], split))
546  return 1;
547  }
548  }
549  if (!tracks.nb_tracks || (!basename && !split))
550  return usage(argv[0], 1);
551 
552  if (!split)
553  output_server_manifest(&tracks, basename);
554  output_client_manifest(&tracks, basename, split);
555 
556  clean_tracks(&tracks);
557 
558  return 0;
559 }
static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
Definition: ismindex.c:81
Bytestream IO Context.
Definition: avio.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:241
int size
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:960
static int usage(const char *argv0, int ret)
Definition: ismindex.c:43
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:381
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
int is_audio
Definition: ismindex.c:60
static void print_track_chunks(FILE *out, struct Tracks *tracks, int main, const char *type)
Definition: ismindex.c:416
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:948
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1816
int tag
Definition: ismindex.c:70
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
int height
Definition: ismindex.c:61
Format I/O context.
Definition: avformat.h:871
static int write_fragments(struct Tracks *tracks, int start_index, AVIOContext *in)
Definition: ismindex.c:119
uint8_t
Round toward +infinity.
Definition: mathematics.h:53
struct MoofOffset * offsets
Definition: ismindex.c:66
miscellaneous OS support macros and functions.
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:589
int id
Format-specific stream ID.
Definition: avformat.h:690
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
int bitrate
Definition: ismindex.c:58
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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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_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
int nb_tracks
Definition: ismindex.c:74
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:935
uint32_t tag
Definition: movenc.c:822
#define AVERROR_EOF
End of file.
Definition: error.h:51
Definition: ismindex.c:55
int64_t time
Definition: ismindex.c:50
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:654
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_fragment(const char *filename, AVIOContext *in)
Definition: ismindex.c:103
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:446
int width
Definition: ismindex.c:61
int is_video
Definition: ismindex.c:60
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
int channels
Definition: ismindex.c:63
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
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=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);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_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
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
Definition: aviobuf.c:794
int sample_rate
Definition: ismindex.c:63
int64_t duration
Definition: ismindex.c:75
#define FFMAX(a, b)
Definition: common.h:55
static char * split(char *message, char delim)
Definition: af_channelmap.c:86
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:437
const char * fourcc
Definition: ismindex.c:68
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:702
static int read_mfra(struct Tracks *tracks, int start_index, const char *file, int split)
Definition: ismindex.c:196
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:923
int bit_rate
the average bitrate
Definition: avcodec.h:1112
int void avio_flush(AVIOContext *s)
Definition: aviobuf.c:180
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:582
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:234
#define FFMIN(a, b)
Definition: common.h:57
int width
picture width / height.
Definition: avcodec.h:1217
int chunks
Definition: ismindex.c:62
static void output_client_manifest(struct Tracks *tracks, const char *basename, int split)
Definition: ismindex.c:433
int32_t
int audio_track
Definition: ismindex.c:77
static void output_server_manifest(struct Tracks *tracks, const char *basename)
Definition: ismindex.c:380
Stream structure.
Definition: avformat.h:683
NULL
Definition: eval.c:55
enum AVMediaType codec_type
Definition: avcodec.h:1062
version
Definition: ffv1enc.c:1080
enum AVCodecID codec_id
Definition: avcodec.h:1065
int sample_rate
samples per second
Definition: avcodec.h:1779
int64_t duration
Definition: ismindex.c:57
static int get_private_data(struct Track *track, AVCodecContext *codec)
Definition: ismindex.c:231
main external API structure.
Definition: avcodec.h:1054
uint8_t * codec_private
Definition: ismindex.c:64
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1080
int timescale
Definition: ismindex.c:67
int extradata_size
Definition: avcodec.h:1163
struct Track ** tracks
Definition: ismindex.c:76
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:777
static void clean_tracks(struct Tracks *tracks)
Definition: ismindex.c:516
int track_id
Definition: ismindex.c:59
int64_t duration
Definition: ismindex.c:52
int codec_private_size
Definition: ismindex.c:65
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:23
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:734
static int get_video_private_data(struct Track *track, AVCodecContext *codec)
Definition: ismindex.c:241
Main libavformat public API header.
int video_track
Definition: ismindex.c:77
int blocksize
Definition: ismindex.c:69
static int handle_file(struct Tracks *tracks, const char *file, int split)
Definition: ismindex.c:270
void * av_realloc(void *ptr, size_t size)
Allocate or reallocate a block of memory.
Definition: mem.c:117
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:2201
const char * name
Definition: ismindex.c:56
int den
denominator
Definition: rational.h:45
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:2640
#define MKBETAG(a, b, c, d)
Definition: common.h:239
int len
int channels
number of audio channels
Definition: avcodec.h:1780
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:268
static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
Definition: ismindex.c:140
int nb_audio_tracks
Definition: ismindex.c:78
int main(int argc, char **argv)
Definition: ismindex.c:528
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:719
void av_register_all(void)
Initialize libavformat and register all the muxers, demuxers and protocols.
Definition: allformats.c:51
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
int64_t offset
Definition: ismindex.c:51
int nb_video_tracks
Definition: ismindex.c:78