1 /*
2 * Copyright (c) 2012 Martin Storsjo
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 * ffmpeg <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 * With -ismf, it also creates foo.ismf, which maps fragment names to
29 * start-end offsets in the ismv, for use in your own streaming server.
30 *
31 * By adding -path-prefix path/, the produced foo.ism will refer to the
32 * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc
33 * file can be set with the -ismc-prefix option similarly.
34 *
35 * To pre-split files for serving as static files by a web server without
36 * any extra server support, create the ismv file as above, and split it:
37 * ismindex -split foo.ismv
38 * This step creates a file Manifest and directories QualityLevel(...),
39 * that can be read directly by a smooth streaming player.
40 *
41 * The -output dir option can be used to request that output files
42 * (both .ism/.ismc, or Manifest/QualityLevels* when splitting)
43 * should be written to this directory instead of in the current directory.
44 * (The directory itself isn't created if it doesn't already exist.)
45 */
46
47 #include <stdio.h>
48 #include <string.h>
49
50 #include "libavformat/avformat.h"
51 #include "libavformat/isom.h"
52 #include "libavformat/os_support.h"
53 #include "libavutil/intreadwrite.h"
54 #include "libavutil/mathematics.h"
55
usage(const char * argv0,int ret)56 static int usage(const char *argv0, int ret)
57 {
58 fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] "
59 "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0);
60 return ret;
61 }
62
63 struct MoofOffset {
64 int64_t time;
65 int64_t offset;
66 int64_t duration;
67 };
68
69 struct Track {
70 const char *name;
71 int64_t duration;
72 int bitrate;
73 int track_id;
74 int is_audio, is_video;
75 int width, height;
76 int chunks;
77 int sample_rate, channels;
78 uint8_t *codec_private;
79 int codec_private_size;
80 struct MoofOffset *offsets;
81 int timescale;
82 const char *fourcc;
83 int blocksize;
84 int tag;
85 };
86
87 struct Tracks {
88 int nb_tracks;
89 int64_t duration;
90 struct Track **tracks;
91 int video_track, audio_track;
92 int nb_video_tracks, nb_audio_tracks;
93 };
94
expect_tag(int32_t got_tag,int32_t expected_tag)95 static int expect_tag(int32_t got_tag, int32_t expected_tag) {
96 if (got_tag != expected_tag) {
97 char got_tag_str[4], expected_tag_str[4];
98 AV_WB32(got_tag_str, got_tag);
99 AV_WB32(expected_tag_str, expected_tag);
100 fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str,
101 got_tag_str);
102 return -1;
103 }
104 return 0;
105 }
106
copy_tag(AVIOContext * in,AVIOContext * out,int32_t tag_name)107 static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name)
108 {
109 int32_t size, tag;
110
111 size = avio_rb32(in);
112 tag = avio_rb32(in);
113 avio_wb32(out, size);
114 avio_wb32(out, tag);
115 if (expect_tag(tag, tag_name) != 0)
116 return -1;
117 size -= 8;
118 while (size > 0) {
119 char buf[1024];
120 int len = FFMIN(sizeof(buf), size);
121 int got;
122 if ((got = avio_read(in, buf, len)) != len) {
123 fprintf(stderr, "short read, wanted %d, got %d\n", len, got);
124 break;
125 }
126 avio_write(out, buf, len);
127 size -= len;
128 }
129 return 0;
130 }
131
skip_tag(AVIOContext * in,int32_t tag_name)132 static int skip_tag(AVIOContext *in, int32_t tag_name)
133 {
134 int64_t pos = avio_tell(in);
135 int32_t size, tag;
136
137 size = avio_rb32(in);
138 tag = avio_rb32(in);
139 if (expect_tag(tag, tag_name) != 0)
140 return -1;
141 avio_seek(in, pos + size, SEEK_SET);
142 return 0;
143 }
144
write_fragment(const char * filename,AVIOContext * in)145 static int write_fragment(const char *filename, AVIOContext *in)
146 {
147 AVIOContext *out = NULL;
148 int ret;
149
150 if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) {
151 char errbuf[100];
152 av_strerror(ret, errbuf, sizeof(errbuf));
153 fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf);
154 return ret;
155 }
156 ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f'));
157 if (!ret)
158 ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't'));
159
160 avio_flush(out);
161 avio_close(out);
162
163 return ret;
164 }
165
skip_fragment(AVIOContext * in)166 static int skip_fragment(AVIOContext *in)
167 {
168 int ret;
169 ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f'));
170 if (!ret)
171 ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't'));
172 return ret;
173 }
174
write_fragments(struct Tracks * tracks,int start_index,AVIOContext * in,const char * basename,int split,int ismf,const char * output_prefix)175 static int write_fragments(struct Tracks *tracks, int start_index,
176 AVIOContext *in, const char *basename,
177 int split, int ismf, const char* output_prefix)
178 {
179 char dirname[2048], filename[2048], idxname[2048];
180 int i, j, ret = 0, fragment_ret;
181 FILE* out = NULL;
182
183 if (ismf) {
184 snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename);
185 out = fopen(idxname, "w");
186 if (!out) {
187 ret = AVERROR(errno);
188 perror(idxname);
189 goto fail;
190 }
191 }
192 for (i = start_index; i < tracks->nb_tracks; i++) {
193 struct Track *track = tracks->tracks[i];
194 const char *type = track->is_video ? "video" : "audio";
195 snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate);
196 if (split) {
197 if (mkdir(dirname, 0777) == -1 && errno != EEXIST) {
198 ret = AVERROR(errno);
199 perror(dirname);
200 goto fail;
201 }
202 }
203 for (j = 0; j < track->chunks; j++) {
204 snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
205 dirname, type, track->offsets[j].time);
206 avio_seek(in, track->offsets[j].offset, SEEK_SET);
207 if (ismf)
208 fprintf(out, "%s %"PRId64, filename, avio_tell(in));
209 if (split)
210 fragment_ret = write_fragment(filename, in);
211 else
212 fragment_ret = skip_fragment(in);
213 if (ismf)
214 fprintf(out, " %"PRId64"\n", avio_tell(in));
215 if (fragment_ret != 0) {
216 fprintf(stderr, "failed fragment %d in track %d (%s)\n", j,
217 track->track_id, track->name);
218 ret = fragment_ret;
219 }
220 }
221 }
222 fail:
223 if (out)
224 fclose(out);
225 return ret;
226 }
227
read_trun_duration(AVIOContext * in,int default_duration,int64_t end)228 static int64_t read_trun_duration(AVIOContext *in, int default_duration,
229 int64_t end)
230 {
231 int64_t dts = 0;
232 int64_t pos;
233 int flags, i;
234 int entries;
235 int64_t first_pts = 0;
236 int64_t max_pts = 0;
237 avio_r8(in); /* version */
238 flags = avio_rb24(in);
239 if (default_duration <= 0 && !(flags & MOV_TRUN_SAMPLE_DURATION)) {
240 fprintf(stderr, "No sample duration in trun flags\n");
241 return -1;
242 }
243 entries = avio_rb32(in);
244
245 if (flags & MOV_TRUN_DATA_OFFSET) avio_rb32(in);
246 if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) avio_rb32(in);
247
248 pos = avio_tell(in);
249 for (i = 0; i < entries && pos < end; i++) {
250 int sample_duration = default_duration;
251 int64_t pts = dts;
252 if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(in);
253 if (flags & MOV_TRUN_SAMPLE_SIZE) avio_rb32(in);
254 if (flags & MOV_TRUN_SAMPLE_FLAGS) avio_rb32(in);
255 if (flags & MOV_TRUN_SAMPLE_CTS) pts += avio_rb32(in);
256 if (sample_duration < 0) {
257 fprintf(stderr, "Negative sample duration %d\n", sample_duration);
258 return -1;
259 }
260 if (i == 0)
261 first_pts = pts;
262 max_pts = FFMAX(max_pts, pts + sample_duration);
263 dts += sample_duration;
264 pos = avio_tell(in);
265 }
266
267 return max_pts - first_pts;
268 }
269
read_moof_duration(AVIOContext * in,int64_t offset)270 static int64_t read_moof_duration(AVIOContext *in, int64_t offset)
271 {
272 int64_t ret = -1;
273 int32_t moof_size, size, tag;
274 int64_t pos = 0;
275 int default_duration = 0;
276
277 avio_seek(in, offset, SEEK_SET);
278 moof_size = avio_rb32(in);
279 tag = avio_rb32(in);
280 if (expect_tag(tag, MKBETAG('m', 'o', 'o', 'f')) != 0)
281 goto fail;
282 while (pos < offset + moof_size) {
283 pos = avio_tell(in);
284 size = avio_rb32(in);
285 tag = avio_rb32(in);
286 if (tag == MKBETAG('t', 'r', 'a', 'f')) {
287 int64_t traf_pos = pos;
288 int64_t traf_size = size;
289 while (pos < traf_pos + traf_size) {
290 pos = avio_tell(in);
291 size = avio_rb32(in);
292 tag = avio_rb32(in);
293 if (tag == MKBETAG('t', 'f', 'h', 'd')) {
294 int flags = 0;
295 avio_r8(in); /* version */
296 flags = avio_rb24(in);
297 avio_rb32(in); /* track_id */
298 if (flags & MOV_TFHD_BASE_DATA_OFFSET)
299 avio_rb64(in);
300 if (flags & MOV_TFHD_STSD_ID)
301 avio_rb32(in);
302 if (flags & MOV_TFHD_DEFAULT_DURATION)
303 default_duration = avio_rb32(in);
304 }
305 if (tag == MKBETAG('t', 'r', 'u', 'n')) {
306 return read_trun_duration(in, default_duration,
307 pos + size);
308 }
309 avio_seek(in, pos + size, SEEK_SET);
310 }
311 fprintf(stderr, "Couldn't find trun\n");
312 goto fail;
313 }
314 avio_seek(in, pos + size, SEEK_SET);
315 }
316 fprintf(stderr, "Couldn't find traf\n");
317
318 fail:
319 return ret;
320 }
321
read_tfra(struct Tracks * tracks,int start_index,AVIOContext * f)322 static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f)
323 {
324 int ret = AVERROR_EOF, track_id;
325 int version, fieldlength, i, j;
326 int64_t pos = avio_tell(f);
327 uint32_t size = avio_rb32(f);
328 struct Track *track = NULL;
329
330 if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a'))
331 goto fail;
332 version = avio_r8(f);
333 avio_rb24(f);
334 track_id = avio_rb32(f); /* track id */
335 for (i = start_index; i < tracks->nb_tracks && !track; i++)
336 if (tracks->tracks[i]->track_id == track_id)
337 track = tracks->tracks[i];
338 if (!track) {
339 /* Ok, continue parsing the next atom */
340 ret = 0;
341 goto fail;
342 }
343 fieldlength = avio_rb32(f);
344 track->chunks = avio_rb32(f);
345 track->offsets = av_mallocz_array(track->chunks, sizeof(*track->offsets));
346 if (!track->offsets) {
347 track->chunks = 0;
348 ret = AVERROR(ENOMEM);
349 goto fail;
350 }
351 // The duration here is always the difference between consecutive
352 // start times.
353 for (i = 0; i < track->chunks; i++) {
354 if (version == 1) {
355 track->offsets[i].time = avio_rb64(f);
356 track->offsets[i].offset = avio_rb64(f);
357 } else {
358 track->offsets[i].time = avio_rb32(f);
359 track->offsets[i].offset = avio_rb32(f);
360 }
361 for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++)
362 avio_r8(f);
363 for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++)
364 avio_r8(f);
365 for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++)
366 avio_r8(f);
367 if (i > 0)
368 track->offsets[i - 1].duration = track->offsets[i].time -
369 track->offsets[i - 1].time;
370 }
371 if (track->chunks > 0) {
372 track->offsets[track->chunks - 1].duration = track->offsets[0].time +
373 track->duration -
374 track->offsets[track->chunks - 1].time;
375 }
376 // Now try to read the actual durations from the trun sample data.
377 for (i = 0; i < track->chunks; i++) {
378 int64_t duration = read_moof_duration(f, track->offsets[i].offset);
379 if (duration > 0 && llabs(duration - track->offsets[i].duration) > 3) {
380 // 3 allows for integer duration to drift a few units,
381 // e.g., for 1/3 durations
382 track->offsets[i].duration = duration;
383 }
384 }
385 if (track->chunks > 0) {
386 if (track->offsets[track->chunks - 1].duration <= 0) {
387 fprintf(stderr, "Calculated last chunk duration for track %d "
388 "was non-positive (%"PRId64"), probably due to missing "
389 "fragments ", track->track_id,
390 track->offsets[track->chunks - 1].duration);
391 if (track->chunks > 1) {
392 track->offsets[track->chunks - 1].duration =
393 track->offsets[track->chunks - 2].duration;
394 } else {
395 track->offsets[track->chunks - 1].duration = 1;
396 }
397 fprintf(stderr, "corrected to %"PRId64"\n",
398 track->offsets[track->chunks - 1].duration);
399 track->duration = track->offsets[track->chunks - 1].time +
400 track->offsets[track->chunks - 1].duration -
401 track->offsets[0].time;
402 fprintf(stderr, "Track duration corrected to %"PRId64"\n",
403 track->duration);
404 }
405 }
406 ret = 0;
407
408 fail:
409 avio_seek(f, pos + size, SEEK_SET);
410 return ret;
411 }
412
read_mfra(struct Tracks * tracks,int start_index,const char * file,int split,int ismf,const char * basename,const char * output_prefix)413 static int read_mfra(struct Tracks *tracks, int start_index,
414 const char *file, int split, int ismf,
415 const char *basename, const char* output_prefix)
416 {
417 int err = 0;
418 const char* err_str = "";
419 AVIOContext *f = NULL;
420 int32_t mfra_size;
421
422 if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0)
423 goto fail;
424 avio_seek(f, avio_size(f) - 4, SEEK_SET);
425 mfra_size = avio_rb32(f);
426 avio_seek(f, -mfra_size, SEEK_CUR);
427 if (avio_rb32(f) != mfra_size) {
428 err = AVERROR_INVALIDDATA;
429 err_str = "mfra size mismatch";
430 goto fail;
431 }
432 if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) {
433 err = AVERROR_INVALIDDATA;
434 err_str = "mfra tag mismatch";
435 goto fail;
436 }
437 while (!read_tfra(tracks, start_index, f)) {
438 /* Empty */
439 }
440
441 if (split || ismf)
442 err = write_fragments(tracks, start_index, f, basename, split, ismf,
443 output_prefix);
444 err_str = "error in write_fragments";
445
446 fail:
447 if (f)
448 avio_close(f);
449 if (err)
450 fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str);
451 return err;
452 }
453
get_private_data(struct Track * track,AVCodecParameters * codecpar)454 static int get_private_data(struct Track *track, AVCodecParameters *codecpar)
455 {
456 track->codec_private_size = 0;
457 track->codec_private = av_mallocz(codecpar->extradata_size);
458 if (!track->codec_private)
459 return AVERROR(ENOMEM);
460 track->codec_private_size = codecpar->extradata_size;
461 memcpy(track->codec_private, codecpar->extradata, codecpar->extradata_size);
462 return 0;
463 }
464
get_video_private_data(struct Track * track,AVCodecParameters * codecpar)465 static int get_video_private_data(struct Track *track, AVCodecParameters *codecpar)
466 {
467 AVIOContext *io = NULL;
468 uint16_t sps_size, pps_size;
469 int err;
470
471 if (codecpar->codec_id == AV_CODEC_ID_VC1)
472 return get_private_data(track, codecpar);
473
474 if ((err = avio_open_dyn_buf(&io)) < 0)
475 goto fail;
476 err = AVERROR(EINVAL);
477 if (codecpar->extradata_size < 11 || codecpar->extradata[0] != 1)
478 goto fail;
479 sps_size = AV_RB16(&codecpar->extradata[6]);
480 if (11 + sps_size > codecpar->extradata_size)
481 goto fail;
482 avio_wb32(io, 0x00000001);
483 avio_write(io, &codecpar->extradata[8], sps_size);
484 pps_size = AV_RB16(&codecpar->extradata[9 + sps_size]);
485 if (11 + sps_size + pps_size > codecpar->extradata_size)
486 goto fail;
487 avio_wb32(io, 0x00000001);
488 avio_write(io, &codecpar->extradata[11 + sps_size], pps_size);
489 err = 0;
490
491 fail:
492 track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private);
493 return err;
494 }
495
handle_file(struct Tracks * tracks,const char * file,int split,int ismf,const char * basename,const char * output_prefix)496 static int handle_file(struct Tracks *tracks, const char *file, int split,
497 int ismf, const char *basename,
498 const char* output_prefix)
499 {
500 AVFormatContext *ctx = NULL;
501 int err = 0, i, orig_tracks = tracks->nb_tracks;
502 char errbuf[50], *ptr;
503 struct Track *track;
504
505 err = avformat_open_input(&ctx, file, NULL, NULL);
506 if (err < 0) {
507 av_strerror(err, errbuf, sizeof(errbuf));
508 fprintf(stderr, "Unable to open %s: %s\n", file, errbuf);
509 return 1;
510 }
511
512 err = avformat_find_stream_info(ctx, NULL);
513 if (err < 0) {
514 av_strerror(err, errbuf, sizeof(errbuf));
515 fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf);
516 goto fail;
517 }
518
519 if (ctx->nb_streams < 1) {
520 fprintf(stderr, "No streams found in %s\n", file);
521 goto fail;
522 }
523
524 for (i = 0; i < ctx->nb_streams; i++) {
525 struct Track **temp;
526 AVStream *st = ctx->streams[i];
527
528 if (st->codecpar->bit_rate == 0) {
529 fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n",
530 st->id, file);
531 continue;
532 }
533
534 track = av_mallocz(sizeof(*track));
535 if (!track) {
536 err = AVERROR(ENOMEM);
537 goto fail;
538 }
539 temp = av_realloc_array(tracks->tracks,
540 tracks->nb_tracks + 1,
541 sizeof(*tracks->tracks));
542 if (!temp) {
543 av_free(track);
544 err = AVERROR(ENOMEM);
545 goto fail;
546 }
547 tracks->tracks = temp;
548 tracks->tracks[tracks->nb_tracks] = track;
549
550 track->name = file;
551 if ((ptr = strrchr(file, '/')))
552 track->name = ptr + 1;
553
554 track->bitrate = st->codecpar->bit_rate;
555 track->track_id = st->id;
556 track->timescale = st->time_base.den;
557 track->duration = st->duration;
558 track->is_audio = st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
559 track->is_video = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
560
561 if (!track->is_audio && !track->is_video) {
562 fprintf(stderr,
563 "Track %d in %s is neither video nor audio, skipping\n",
564 track->track_id, file);
565 av_freep(&tracks->tracks[tracks->nb_tracks]);
566 continue;
567 }
568
569 tracks->duration = FFMAX(tracks->duration,
570 av_rescale_rnd(track->duration, AV_TIME_BASE,
571 track->timescale, AV_ROUND_UP));
572
573 if (track->is_audio) {
574 if (tracks->audio_track < 0)
575 tracks->audio_track = tracks->nb_tracks;
576 tracks->nb_audio_tracks++;
577 track->channels = st->codecpar->channels;
578 track->sample_rate = st->codecpar->sample_rate;
579 if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
580 track->fourcc = "AACL";
581 track->tag = 255;
582 track->blocksize = 4;
583 } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) {
584 track->fourcc = "WMAP";
585 track->tag = st->codecpar->codec_tag;
586 track->blocksize = st->codecpar->block_align;
587 }
588 get_private_data(track, st->codecpar);
589 }
590 if (track->is_video) {
591 if (tracks->video_track < 0)
592 tracks->video_track = tracks->nb_tracks;
593 tracks->nb_video_tracks++;
594 track->width = st->codecpar->width;
595 track->height = st->codecpar->height;
596 if (st->codecpar->codec_id == AV_CODEC_ID_H264)
597 track->fourcc = "H264";
598 else if (st->codecpar->codec_id == AV_CODEC_ID_VC1)
599 track->fourcc = "WVC1";
600 get_video_private_data(track, st->codecpar);
601 }
602
603 tracks->nb_tracks++;
604 }
605
606 avformat_close_input(&ctx);
607
608 err = read_mfra(tracks, orig_tracks, file, split, ismf, basename,
609 output_prefix);
610
611 fail:
612 if (ctx)
613 avformat_close_input(&ctx);
614 return err;
615 }
616
output_server_manifest(struct Tracks * tracks,const char * basename,const char * output_prefix,const char * path_prefix,const char * ismc_prefix)617 static void output_server_manifest(struct Tracks *tracks, const char *basename,
618 const char *output_prefix,
619 const char *path_prefix,
620 const char *ismc_prefix)
621 {
622 char filename[1000];
623 FILE *out;
624 int i;
625
626 snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename);
627 out = fopen(filename, "w");
628 if (!out) {
629 perror(filename);
630 return;
631 }
632 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
633 fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n");
634 fprintf(out, "\t<head>\n");
635 fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" "
636 "content=\"%s%s.ismc\" />\n", ismc_prefix, basename);
637 fprintf(out, "\t</head>\n");
638 fprintf(out, "\t<body>\n");
639 fprintf(out, "\t\t<switch>\n");
640 for (i = 0; i < tracks->nb_tracks; i++) {
641 struct Track *track = tracks->tracks[i];
642 const char *type = track->is_video ? "video" : "audio";
643 fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n",
644 type, path_prefix, track->name, track->bitrate);
645 fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" "
646 "valueType=\"data\" />\n", track->track_id);
647 fprintf(out, "\t\t\t</%s>\n", type);
648 }
649 fprintf(out, "\t\t</switch>\n");
650 fprintf(out, "\t</body>\n");
651 fprintf(out, "</smil>\n");
652 fclose(out);
653 }
654
print_track_chunks(FILE * out,struct Tracks * tracks,int main,const char * type)655 static void print_track_chunks(FILE *out, struct Tracks *tracks, int main,
656 const char *type)
657 {
658 int i, j;
659 int64_t pos = 0;
660 struct Track *track = tracks->tracks[main];
661 int should_print_time_mismatch = 1;
662
663 for (i = 0; i < track->chunks; i++) {
664 for (j = main + 1; j < tracks->nb_tracks; j++) {
665 if (tracks->tracks[j]->is_audio == track->is_audio) {
666 if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) {
667 fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n",
668 type, i, track->name, main, tracks->tracks[j]->name, j);
669 should_print_time_mismatch = 1;
670 }
671 if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) {
672 if (should_print_time_mismatch)
673 fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n",
674 type, i, track->name, main, tracks->tracks[j]->name, j);
675 should_print_time_mismatch = 0;
676 }
677 }
678 }
679 fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" ",
680 i, track->offsets[i].duration);
681 if (pos != track->offsets[i].time) {
682 fprintf(out, "t=\"%"PRId64"\" ", track->offsets[i].time);
683 pos = track->offsets[i].time;
684 }
685 pos += track->offsets[i].duration;
686 fprintf(out, "/>\n");
687 }
688 }
689
output_client_manifest(struct Tracks * tracks,const char * basename,const char * output_prefix,int split)690 static void output_client_manifest(struct Tracks *tracks, const char *basename,
691 const char *output_prefix, int split)
692 {
693 char filename[1000];
694 FILE *out;
695 int i, j;
696
697 if (split)
698 snprintf(filename, sizeof(filename), "%sManifest", output_prefix);
699 else
700 snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename);
701 out = fopen(filename, "w");
702 if (!out) {
703 perror(filename);
704 return;
705 }
706 fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
707 fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" "
708 "Duration=\"%"PRId64 "\">\n", tracks->duration * 10);
709 if (tracks->video_track >= 0) {
710 struct Track *track = tracks->tracks[tracks->video_track];
711 struct Track *first_track = track;
712 int index = 0;
713 fprintf(out,
714 "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" "
715 "Chunks=\"%d\" "
716 "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n",
717 tracks->nb_video_tracks, track->chunks);
718 for (i = 0; i < tracks->nb_tracks; i++) {
719 track = tracks->tracks[i];
720 if (!track->is_video)
721 continue;
722 fprintf(out,
723 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
724 "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" "
725 "CodecPrivateData=\"",
726 index, track->bitrate, track->fourcc, track->width, track->height);
727 for (j = 0; j < track->codec_private_size; j++)
728 fprintf(out, "%02X", track->codec_private[j]);
729 fprintf(out, "\" />\n");
730 index++;
731 if (track->chunks != first_track->chunks)
732 fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n",
733 track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks);
734 }
735 print_track_chunks(out, tracks, tracks->video_track, "video");
736 fprintf(out, "\t</StreamIndex>\n");
737 }
738 if (tracks->audio_track >= 0) {
739 struct Track *track = tracks->tracks[tracks->audio_track];
740 struct Track *first_track = track;
741 int index = 0;
742 fprintf(out,
743 "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" "
744 "Chunks=\"%d\" "
745 "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n",
746 tracks->nb_audio_tracks, track->chunks);
747 for (i = 0; i < tracks->nb_tracks; i++) {
748 track = tracks->tracks[i];
749 if (!track->is_audio)
750 continue;
751 fprintf(out,
752 "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" "
753 "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" "
754 "BitsPerSample=\"16\" PacketSize=\"%d\" "
755 "AudioTag=\"%d\" CodecPrivateData=\"",
756 index, track->bitrate, track->fourcc, track->sample_rate,
757 track->channels, track->blocksize, track->tag);
758 for (j = 0; j < track->codec_private_size; j++)
759 fprintf(out, "%02X", track->codec_private[j]);
760 fprintf(out, "\" />\n");
761 index++;
762 if (track->chunks != first_track->chunks)
763 fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n",
764 track->name, first_track->name);
765 }
766 print_track_chunks(out, tracks, tracks->audio_track, "audio");
767 fprintf(out, "\t</StreamIndex>\n");
768 }
769 fprintf(out, "</SmoothStreamingMedia>\n");
770 fclose(out);
771 }
772
clean_tracks(struct Tracks * tracks)773 static void clean_tracks(struct Tracks *tracks)
774 {
775 int i;
776 for (i = 0; i < tracks->nb_tracks; i++) {
777 av_freep(&tracks->tracks[i]->codec_private);
778 av_freep(&tracks->tracks[i]->offsets);
779 av_freep(&tracks->tracks[i]);
780 }
781 av_freep(&tracks->tracks);
782 tracks->nb_tracks = 0;
783 }
784
main(int argc,char ** argv)785 int main(int argc, char **argv)
786 {
787 const char *basename = NULL;
788 const char *path_prefix = "", *ismc_prefix = "";
789 const char *output_prefix = "";
790 char output_prefix_buf[2048];
791 int split = 0, ismf = 0, i;
792 struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 };
793
794 for (i = 1; i < argc; i++) {
795 if (!strcmp(argv[i], "-n")) {
796 basename = argv[i + 1];
797 i++;
798 } else if (!strcmp(argv[i], "-path-prefix")) {
799 path_prefix = argv[i + 1];
800 i++;
801 } else if (!strcmp(argv[i], "-ismc-prefix")) {
802 ismc_prefix = argv[i + 1];
803 i++;
804 } else if (!strcmp(argv[i], "-output")) {
805 output_prefix = argv[i + 1];
806 i++;
807 if (output_prefix[strlen(output_prefix) - 1] != '/') {
808 snprintf(output_prefix_buf, sizeof(output_prefix_buf),
809 "%s/", output_prefix);
810 output_prefix = output_prefix_buf;
811 }
812 } else if (!strcmp(argv[i], "-split")) {
813 split = 1;
814 } else if (!strcmp(argv[i], "-ismf")) {
815 ismf = 1;
816 } else if (argv[i][0] == '-') {
817 return usage(argv[0], 1);
818 } else {
819 if (!basename)
820 ismf = 0;
821 if (handle_file(&tracks, argv[i], split, ismf,
822 basename, output_prefix))
823 return 1;
824 }
825 }
826 if (!tracks.nb_tracks || (!basename && !split))
827 return usage(argv[0], 1);
828
829 if (!split)
830 output_server_manifest(&tracks, basename, output_prefix,
831 path_prefix, ismc_prefix);
832 output_client_manifest(&tracks, basename, output_prefix, split);
833
834 clean_tracks(&tracks);
835
836 return 0;
837 }
838