1 /*
2 * MPEG-DASH ISO BMFF segmenter
3 * Copyright (c) 2014 Martin Storsjo
4 * Copyright (c) 2018 Akamai Technologies, Inc.
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "config.h"
24 #if HAVE_UNISTD_H
25 #include <unistd.h>
26 #endif
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/avutil.h"
30 #include "libavutil/avstring.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mathematics.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/parseutils.h"
35 #include "libavutil/rational.h"
36 #include "libavutil/time.h"
37 #include "libavutil/time_internal.h"
38
39 #include "av1.h"
40 #include "avc.h"
41 #include "avformat.h"
42 #include "avio_internal.h"
43 #include "hlsplaylist.h"
44 #if CONFIG_HTTP_PROTOCOL
45 #include "http.h"
46 #endif
47 #include "internal.h"
48 #include "isom.h"
49 #include "os_support.h"
50 #include "url.h"
51 #include "vpcc.h"
52 #include "dash.h"
53
54 typedef enum {
55 SEGMENT_TYPE_AUTO = 0,
56 SEGMENT_TYPE_MP4,
57 SEGMENT_TYPE_WEBM,
58 SEGMENT_TYPE_NB
59 } SegmentType;
60
61 enum {
62 FRAG_TYPE_NONE = 0,
63 FRAG_TYPE_EVERY_FRAME,
64 FRAG_TYPE_DURATION,
65 FRAG_TYPE_PFRAMES,
66 FRAG_TYPE_NB
67 };
68
69 #define MPD_PROFILE_DASH 1
70 #define MPD_PROFILE_DVB 2
71
72 typedef struct Segment {
73 char file[1024];
74 int64_t start_pos;
75 int range_length, index_length;
76 int64_t time;
77 double prog_date_time;
78 int64_t duration;
79 int n;
80 } Segment;
81
82 typedef struct AdaptationSet {
83 int id;
84 char *descriptor;
85 int64_t seg_duration;
86 int64_t frag_duration;
87 int frag_type;
88 enum AVMediaType media_type;
89 AVDictionary *metadata;
90 AVRational min_frame_rate, max_frame_rate;
91 int ambiguous_frame_rate;
92 int64_t max_frag_duration;
93 int max_width, max_height;
94 int nb_streams;
95 AVRational par;
96 int trick_idx;
97 } AdaptationSet;
98
99 typedef struct OutputStream {
100 AVFormatContext *ctx;
101 int ctx_inited, as_idx;
102 AVIOContext *out;
103 AVCodecParserContext *parser;
104 AVCodecContext *parser_avctx;
105 int packets_written;
106 char initfile[1024];
107 int64_t init_start_pos, pos;
108 int init_range_length;
109 int nb_segments, segments_size, segment_index;
110 int64_t seg_duration;
111 int64_t frag_duration;
112 int64_t last_duration;
113 Segment **segments;
114 int64_t first_pts, start_pts, max_pts;
115 int64_t last_dts, last_pts;
116 int last_flags;
117 int bit_rate;
118 int first_segment_bit_rate;
119 SegmentType segment_type; /* segment type selected for this particular stream */
120 const char *format_name;
121 const char *extension_name;
122 const char *single_file_name; /* file names selected for this particular stream */
123 const char *init_seg_name;
124 const char *media_seg_name;
125
126 char codec_str[100];
127 int written_len;
128 char filename[1024];
129 char full_path[1024];
130 char temp_path[1024];
131 double availability_time_offset;
132 AVProducerReferenceTime producer_reference_time;
133 char producer_reference_time_str[100];
134 int total_pkt_size;
135 int64_t total_pkt_duration;
136 int muxer_overhead;
137 int frag_type;
138 int64_t gop_size;
139 AVRational sar;
140 int coding_dependency;
141 } OutputStream;
142
143 typedef struct DASHContext {
144 const AVClass *class; /* Class for private options. */
145 char *adaptation_sets;
146 AdaptationSet *as;
147 int nb_as;
148 int window_size;
149 int extra_window_size;
150 #if FF_API_DASH_MIN_SEG_DURATION
151 int min_seg_duration;
152 #endif
153 int64_t seg_duration;
154 int64_t frag_duration;
155 int remove_at_exit;
156 int use_template;
157 int use_timeline;
158 int single_file;
159 OutputStream *streams;
160 int has_video;
161 int64_t last_duration;
162 int64_t total_duration;
163 char availability_start_time[100];
164 time_t start_time_s;
165 int64_t presentation_time_offset;
166 char dirname[1024];
167 const char *single_file_name; /* file names as specified in options */
168 const char *init_seg_name;
169 const char *media_seg_name;
170 const char *utc_timing_url;
171 const char *method;
172 const char *user_agent;
173 AVDictionary *http_opts;
174 int hls_playlist;
175 const char *hls_master_name;
176 int http_persistent;
177 int master_playlist_created;
178 AVIOContext *mpd_out;
179 AVIOContext *m3u8_out;
180 int streaming;
181 int64_t timeout;
182 int index_correction;
183 AVDictionary *format_options;
184 int global_sidx;
185 SegmentType segment_type_option; /* segment type as specified in options */
186 int ignore_io_errors;
187 int lhls;
188 int ldash;
189 int master_publish_rate;
190 int nr_of_streams_to_flush;
191 int nr_of_streams_flushed;
192 int frag_type;
193 int write_prft;
194 int64_t max_gop_size;
195 int64_t max_segment_duration;
196 int profile;
197 int64_t target_latency;
198 int target_latency_refid;
199 AVRational min_playback_rate;
200 AVRational max_playback_rate;
201 int64_t update_period;
202 } DASHContext;
203
204 static struct codec_string {
205 int id;
206 const char *str;
207 } codecs[] = {
208 { AV_CODEC_ID_VP8, "vp8" },
209 { AV_CODEC_ID_VP9, "vp9" },
210 { AV_CODEC_ID_VORBIS, "vorbis" },
211 { AV_CODEC_ID_OPUS, "opus" },
212 { AV_CODEC_ID_FLAC, "flac" },
213 { 0, NULL }
214 };
215
216 static struct format_string {
217 SegmentType segment_type;
218 const char *str;
219 } formats[] = {
220 { SEGMENT_TYPE_AUTO, "auto" },
221 { SEGMENT_TYPE_MP4, "mp4" },
222 { SEGMENT_TYPE_WEBM, "webm" },
223 { 0, NULL }
224 };
225
dashenc_io_open(AVFormatContext * s,AVIOContext ** pb,char * filename,AVDictionary ** options)226 static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
227 AVDictionary **options) {
228 DASHContext *c = s->priv_data;
229 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
230 int err = AVERROR_MUXER_NOT_FOUND;
231 if (!*pb || !http_base_proto || !c->http_persistent) {
232 err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
233 #if CONFIG_HTTP_PROTOCOL
234 } else {
235 URLContext *http_url_context = ffio_geturlcontext(*pb);
236 av_assert0(http_url_context);
237 err = ff_http_do_new_request(http_url_context, filename);
238 if (err < 0)
239 ff_format_io_close(s, pb);
240 #endif
241 }
242 return err;
243 }
244
dashenc_io_close(AVFormatContext * s,AVIOContext ** pb,char * filename)245 static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
246 DASHContext *c = s->priv_data;
247 int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
248
249 if (!*pb)
250 return;
251
252 if (!http_base_proto || !c->http_persistent) {
253 ff_format_io_close(s, pb);
254 #if CONFIG_HTTP_PROTOCOL
255 } else {
256 URLContext *http_url_context = ffio_geturlcontext(*pb);
257 av_assert0(http_url_context);
258 avio_flush(*pb);
259 ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
260 #endif
261 }
262 }
263
get_format_str(SegmentType segment_type)264 static const char *get_format_str(SegmentType segment_type) {
265 int i;
266 for (i = 0; i < SEGMENT_TYPE_NB; i++)
267 if (formats[i].segment_type == segment_type)
268 return formats[i].str;
269 return NULL;
270 }
271
get_extension_str(SegmentType type,int single_file)272 static const char *get_extension_str(SegmentType type, int single_file)
273 {
274 switch (type) {
275
276 case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
277 case SEGMENT_TYPE_WEBM: return "webm";
278 default: return NULL;
279 }
280 }
281
handle_io_open_error(AVFormatContext * s,int err,char * url)282 static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
283 DASHContext *c = s->priv_data;
284 char errbuf[AV_ERROR_MAX_STRING_SIZE];
285 av_strerror(err, errbuf, sizeof(errbuf));
286 av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
287 "Unable to open %s for writing: %s\n", url, errbuf);
288 return c->ignore_io_errors ? 0 : err;
289 }
290
select_segment_type(SegmentType segment_type,enum AVCodecID codec_id)291 static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
292 {
293 if (segment_type == SEGMENT_TYPE_AUTO) {
294 if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
295 codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
296 segment_type = SEGMENT_TYPE_WEBM;
297 } else {
298 segment_type = SEGMENT_TYPE_MP4;
299 }
300 }
301
302 return segment_type;
303 }
304
init_segment_types(AVFormatContext * s)305 static int init_segment_types(AVFormatContext *s)
306 {
307 DASHContext *c = s->priv_data;
308 int has_mp4_streams = 0;
309 for (int i = 0; i < s->nb_streams; ++i) {
310 OutputStream *os = &c->streams[i];
311 SegmentType segment_type = select_segment_type(
312 c->segment_type_option, s->streams[i]->codecpar->codec_id);
313 os->segment_type = segment_type;
314 os->format_name = get_format_str(segment_type);
315 if (!os->format_name) {
316 av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
317 return AVERROR_MUXER_NOT_FOUND;
318 }
319 os->extension_name = get_extension_str(segment_type, c->single_file);
320 if (!os->extension_name) {
321 av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
322 return AVERROR_MUXER_NOT_FOUND;
323 }
324
325 has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
326 }
327
328 if (c->hls_playlist && !has_mp4_streams) {
329 av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
330 c->hls_playlist = 0;
331 }
332
333 return 0;
334 }
335
check_file_extension(const char * filename,const char * extension)336 static int check_file_extension(const char *filename, const char *extension) {
337 char *dot;
338 if (!filename || !extension)
339 return -1;
340 dot = strrchr(filename, '.');
341 if (dot && !strcmp(dot + 1, extension))
342 return 0;
343 return -1;
344 }
345
set_vp9_codec_str(AVFormatContext * s,AVCodecParameters * par,AVRational * frame_rate,char * str,int size)346 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
347 AVRational *frame_rate, char *str, int size) {
348 VPCC vpcc;
349 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
350 if (ret == 0) {
351 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
352 vpcc.profile, vpcc.level, vpcc.bitdepth);
353 } else {
354 // Default to just vp9 in case of error while finding out profile or level
355 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
356 av_strlcpy(str, "vp9", size);
357 }
358 return;
359 }
360
set_codec_str(AVFormatContext * s,AVCodecParameters * par,AVRational * frame_rate,char * str,int size)361 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
362 AVRational *frame_rate, char *str, int size)
363 {
364 const AVCodecTag *tags[2] = { NULL, NULL };
365 uint32_t tag;
366 int i;
367
368 // common Webm codecs are not part of RFC 6381
369 for (i = 0; codecs[i].id; i++)
370 if (codecs[i].id == par->codec_id) {
371 if (codecs[i].id == AV_CODEC_ID_VP9) {
372 set_vp9_codec_str(s, par, frame_rate, str, size);
373 } else {
374 av_strlcpy(str, codecs[i].str, size);
375 }
376 return;
377 }
378
379 // for codecs part of RFC 6381
380 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
381 tags[0] = ff_codec_movvideo_tags;
382 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
383 tags[0] = ff_codec_movaudio_tags;
384 else
385 return;
386
387 tag = par->codec_tag;
388 if (!tag)
389 tag = av_codec_get_tag(tags, par->codec_id);
390 if (!tag)
391 return;
392 if (size < 5)
393 return;
394
395 AV_WL32(str, tag);
396 str[4] = '\0';
397 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
398 uint32_t oti;
399 tags[0] = ff_mp4_obj_type;
400 oti = av_codec_get_tag(tags, par->codec_id);
401 if (oti)
402 av_strlcatf(str, size, ".%02"PRIx32, oti);
403 else
404 return;
405
406 if (tag == MKTAG('m', 'p', '4', 'a')) {
407 if (par->extradata_size >= 2) {
408 int aot = par->extradata[0] >> 3;
409 if (aot == 31)
410 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
411 av_strlcatf(str, size, ".%d", aot);
412 }
413 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
414 // Unimplemented, should output ProfileLevelIndication as a decimal number
415 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
416 }
417 } else if (!strcmp(str, "avc1")) {
418 uint8_t *tmpbuf = NULL;
419 uint8_t *extradata = par->extradata;
420 int extradata_size = par->extradata_size;
421 if (!extradata_size)
422 return;
423 if (extradata[0] != 1) {
424 AVIOContext *pb;
425 if (avio_open_dyn_buf(&pb) < 0)
426 return;
427 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
428 ffio_free_dyn_buf(&pb);
429 return;
430 }
431 extradata_size = avio_close_dyn_buf(pb, &extradata);
432 tmpbuf = extradata;
433 }
434
435 if (extradata_size >= 4)
436 av_strlcatf(str, size, ".%02x%02x%02x",
437 extradata[1], extradata[2], extradata[3]);
438 av_free(tmpbuf);
439 } else if (!strcmp(str, "av01")) {
440 AV1SequenceParameters seq;
441 if (!par->extradata_size)
442 return;
443 if (ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size) < 0)
444 return;
445
446 av_strlcatf(str, size, ".%01u.%02u%s.%02u",
447 seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth);
448 if (seq.color_description_present_flag)
449 av_strlcatf(str, size, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u",
450 seq.monochrome,
451 seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position,
452 seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients,
453 seq.color_range);
454 }
455 }
456
flush_dynbuf(DASHContext * c,OutputStream * os,int * range_length)457 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
458 {
459 uint8_t *buffer;
460
461 if (!os->ctx->pb) {
462 return AVERROR(EINVAL);
463 }
464
465 // flush
466 av_write_frame(os->ctx, NULL);
467 avio_flush(os->ctx->pb);
468
469 if (!c->single_file) {
470 // write out to file
471 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
472 os->ctx->pb = NULL;
473 if (os->out)
474 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
475 os->written_len = 0;
476 av_free(buffer);
477
478 // re-open buffer
479 return avio_open_dyn_buf(&os->ctx->pb);
480 } else {
481 *range_length = avio_tell(os->ctx->pb) - os->pos;
482 return 0;
483 }
484 }
485
set_http_options(AVDictionary ** options,DASHContext * c)486 static void set_http_options(AVDictionary **options, DASHContext *c)
487 {
488 if (c->method)
489 av_dict_set(options, "method", c->method, 0);
490 av_dict_copy(options, c->http_opts, 0);
491 if (c->user_agent)
492 av_dict_set(options, "user_agent", c->user_agent, 0);
493 if (c->http_persistent)
494 av_dict_set_int(options, "multiple_requests", 1, 0);
495 if (c->timeout >= 0)
496 av_dict_set_int(options, "timeout", c->timeout, 0);
497 }
498
get_hls_playlist_name(char * playlist_name,int string_size,const char * base_url,int id)499 static void get_hls_playlist_name(char *playlist_name, int string_size,
500 const char *base_url, int id) {
501 if (base_url)
502 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
503 else
504 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
505 }
506
get_start_index_number(OutputStream * os,DASHContext * c,int * start_index,int * start_number)507 static void get_start_index_number(OutputStream *os, DASHContext *c,
508 int *start_index, int *start_number) {
509 *start_index = 0;
510 *start_number = 1;
511 if (c->window_size) {
512 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
513 *start_number = FFMAX(os->segment_index - c->window_size, 1);
514 }
515 }
516
write_hls_media_playlist(OutputStream * os,AVFormatContext * s,int representation_id,int final,char * prefetch_url)517 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
518 int representation_id, int final,
519 char *prefetch_url) {
520 DASHContext *c = s->priv_data;
521 int timescale = os->ctx->streams[0]->time_base.den;
522 char temp_filename_hls[1024];
523 char filename_hls[1024];
524 AVDictionary *http_opts = NULL;
525 int target_duration = 0;
526 int ret = 0;
527 const char *proto = avio_find_protocol_name(c->dirname);
528 int use_rename = proto && !strcmp(proto, "file");
529 int i, start_index, start_number;
530 double prog_date_time = 0;
531
532 get_start_index_number(os, c, &start_index, &start_number);
533
534 if (!c->hls_playlist || start_index >= os->nb_segments ||
535 os->segment_type != SEGMENT_TYPE_MP4)
536 return;
537
538 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
539 c->dirname, representation_id);
540
541 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
542
543 set_http_options(&http_opts, c);
544 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
545 av_dict_free(&http_opts);
546 if (ret < 0) {
547 handle_io_open_error(s, ret, temp_filename_hls);
548 return;
549 }
550 for (i = start_index; i < os->nb_segments; i++) {
551 Segment *seg = os->segments[i];
552 double duration = (double) seg->duration / timescale;
553 if (target_duration <= duration)
554 target_duration = lrint(duration);
555 }
556
557 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
558 start_number, PLAYLIST_TYPE_NONE, 0);
559
560 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
561 os->init_range_length, os->init_start_pos);
562
563 for (i = start_index; i < os->nb_segments; i++) {
564 Segment *seg = os->segments[i];
565
566 if (prog_date_time == 0) {
567 if (os->nb_segments == 1)
568 prog_date_time = c->start_time_s;
569 else
570 prog_date_time = seg->prog_date_time;
571 }
572 seg->prog_date_time = prog_date_time;
573
574 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
575 (double) seg->duration / timescale, 0,
576 seg->range_length, seg->start_pos, NULL,
577 c->single_file ? os->initfile : seg->file,
578 &prog_date_time, 0, 0, 0);
579 if (ret < 0) {
580 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
581 }
582 }
583
584 if (prefetch_url)
585 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
586
587 if (final)
588 ff_hls_write_end_list(c->m3u8_out);
589
590 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
591
592 if (use_rename)
593 ff_rename(temp_filename_hls, filename_hls, os->ctx);
594 }
595
flush_init_segment(AVFormatContext * s,OutputStream * os)596 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
597 {
598 DASHContext *c = s->priv_data;
599 int ret, range_length;
600
601 ret = flush_dynbuf(c, os, &range_length);
602 if (ret < 0)
603 return ret;
604
605 os->pos = os->init_range_length = range_length;
606 if (!c->single_file) {
607 char filename[1024];
608 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
609 dashenc_io_close(s, &os->out, filename);
610 }
611 return 0;
612 }
613
dash_free(AVFormatContext * s)614 static void dash_free(AVFormatContext *s)
615 {
616 DASHContext *c = s->priv_data;
617 int i, j;
618
619 if (c->as) {
620 for (i = 0; i < c->nb_as; i++) {
621 av_dict_free(&c->as[i].metadata);
622 av_freep(&c->as[i].descriptor);
623 }
624 av_freep(&c->as);
625 c->nb_as = 0;
626 }
627
628 if (!c->streams)
629 return;
630 for (i = 0; i < s->nb_streams; i++) {
631 OutputStream *os = &c->streams[i];
632 if (os->ctx && os->ctx->pb) {
633 if (!c->single_file)
634 ffio_free_dyn_buf(&os->ctx->pb);
635 else
636 avio_close(os->ctx->pb);
637 }
638 ff_format_io_close(s, &os->out);
639 avformat_free_context(os->ctx);
640 avcodec_free_context(&os->parser_avctx);
641 av_parser_close(os->parser);
642 for (j = 0; j < os->nb_segments; j++)
643 av_free(os->segments[j]);
644 av_free(os->segments);
645 av_freep(&os->single_file_name);
646 av_freep(&os->init_seg_name);
647 av_freep(&os->media_seg_name);
648 }
649 av_freep(&c->streams);
650
651 ff_format_io_close(s, &c->mpd_out);
652 ff_format_io_close(s, &c->m3u8_out);
653 }
654
output_segment_list(OutputStream * os,AVIOContext * out,AVFormatContext * s,int representation_id,int final)655 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
656 int representation_id, int final)
657 {
658 DASHContext *c = s->priv_data;
659 int i, start_index, start_number;
660 get_start_index_number(os, c, &start_index, &start_number);
661
662 if (c->use_template) {
663 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
664 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
665 if (!c->use_timeline) {
666 avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
667 if (c->streaming && os->availability_time_offset)
668 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
669 os->availability_time_offset);
670 }
671 if (c->streaming && os->availability_time_offset && !final)
672 avio_printf(out, "availabilityTimeComplete=\"false\" ");
673
674 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
675 if (c->presentation_time_offset)
676 avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
677 avio_printf(out, ">\n");
678 if (c->use_timeline) {
679 int64_t cur_time = 0;
680 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
681 for (i = start_index; i < os->nb_segments; ) {
682 Segment *seg = os->segments[i];
683 int repeat = 0;
684 avio_printf(out, "\t\t\t\t\t\t<S ");
685 if (i == start_index || seg->time != cur_time) {
686 cur_time = seg->time;
687 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
688 }
689 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
690 while (i + repeat + 1 < os->nb_segments &&
691 os->segments[i + repeat + 1]->duration == seg->duration &&
692 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
693 repeat++;
694 if (repeat > 0)
695 avio_printf(out, "r=\"%d\" ", repeat);
696 avio_printf(out, "/>\n");
697 i += 1 + repeat;
698 cur_time += (1 + repeat) * seg->duration;
699 }
700 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
701 }
702 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
703 } else if (c->single_file) {
704 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
705 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
706 avio_printf(out, "\t\t\t\t\t<Initialization range=\"%"PRId64"-%"PRId64"\" />\n", os->init_start_pos, os->init_start_pos + os->init_range_length - 1);
707 for (i = start_index; i < os->nb_segments; i++) {
708 Segment *seg = os->segments[i];
709 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
710 if (seg->index_length)
711 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
712 avio_printf(out, "/>\n");
713 }
714 avio_printf(out, "\t\t\t\t</SegmentList>\n");
715 } else {
716 avio_printf(out, "\t\t\t\t<SegmentList timescale=\"%d\" duration=\"%"PRId64"\" startNumber=\"%d\">\n", AV_TIME_BASE, FFMIN(os->seg_duration, os->last_duration), start_number);
717 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
718 for (i = start_index; i < os->nb_segments; i++) {
719 Segment *seg = os->segments[i];
720 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
721 }
722 avio_printf(out, "\t\t\t\t</SegmentList>\n");
723 }
724 if (!c->lhls || final) {
725 write_hls_media_playlist(os, s, representation_id, final, NULL);
726 }
727
728 }
729
xmlescape(const char * str)730 static char *xmlescape(const char *str) {
731 int outlen = strlen(str)*3/2 + 6;
732 char *out = av_realloc(NULL, outlen + 1);
733 int pos = 0;
734 if (!out)
735 return NULL;
736 for (; *str; str++) {
737 if (pos + 6 > outlen) {
738 char *tmp;
739 outlen = 2 * outlen + 6;
740 tmp = av_realloc(out, outlen + 1);
741 if (!tmp) {
742 av_free(out);
743 return NULL;
744 }
745 out = tmp;
746 }
747 if (*str == '&') {
748 memcpy(&out[pos], "&", 5);
749 pos += 5;
750 } else if (*str == '<') {
751 memcpy(&out[pos], "<", 4);
752 pos += 4;
753 } else if (*str == '>') {
754 memcpy(&out[pos], ">", 4);
755 pos += 4;
756 } else if (*str == '\'') {
757 memcpy(&out[pos], "'", 6);
758 pos += 6;
759 } else if (*str == '\"') {
760 memcpy(&out[pos], """, 6);
761 pos += 6;
762 } else {
763 out[pos++] = *str;
764 }
765 }
766 out[pos] = '\0';
767 return out;
768 }
769
write_time(AVIOContext * out,int64_t time)770 static void write_time(AVIOContext *out, int64_t time)
771 {
772 int seconds = time / AV_TIME_BASE;
773 int fractions = time % AV_TIME_BASE;
774 int minutes = seconds / 60;
775 int hours = minutes / 60;
776 seconds %= 60;
777 minutes %= 60;
778 avio_printf(out, "PT");
779 if (hours)
780 avio_printf(out, "%dH", hours);
781 if (hours || minutes)
782 avio_printf(out, "%dM", minutes);
783 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
784 }
785
format_date(char * buf,int size,int64_t time_us)786 static void format_date(char *buf, int size, int64_t time_us)
787 {
788 struct tm *ptm, tmbuf;
789 int64_t time_ms = time_us / 1000;
790 const time_t time_s = time_ms / 1000;
791 int millisec = time_ms - (time_s * 1000);
792 ptm = gmtime_r(&time_s, &tmbuf);
793 if (ptm) {
794 int len;
795 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
796 buf[0] = '\0';
797 return;
798 }
799 len = strlen(buf);
800 snprintf(buf + len, size - len, ".%03dZ", millisec);
801 }
802 }
803
write_adaptation_set(AVFormatContext * s,AVIOContext * out,int as_index,int final)804 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
805 int final)
806 {
807 DASHContext *c = s->priv_data;
808 AdaptationSet *as = &c->as[as_index];
809 AVDictionaryEntry *lang, *role;
810 int i;
811
812 avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"%s\" startWithSAP=\"1\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
813 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
814 if (as->media_type == AVMEDIA_TYPE_VIDEO && as->max_frame_rate.num && !as->ambiguous_frame_rate && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
815 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
816 else if (as->media_type == AVMEDIA_TYPE_VIDEO && as->max_frame_rate.num && !as->ambiguous_frame_rate && !av_cmp_q(as->min_frame_rate, as->max_frame_rate))
817 avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
818 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
819 avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
820 avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
821 }
822 lang = av_dict_get(as->metadata, "language", NULL, 0);
823 if (lang)
824 avio_printf(out, " lang=\"%s\"", lang->value);
825 avio_printf(out, ">\n");
826
827 if (!final && c->ldash && as->max_frag_duration && !(c->profile & MPD_PROFILE_DVB))
828 avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
829 if (as->trick_idx >= 0)
830 avio_printf(out, "\t\t\t<EssentialProperty id=\"%d\" schemeIdUri=\"http://dashif.org/guidelines/trickmode\" value=\"%d\"/>\n", as->id, as->trick_idx);
831 role = av_dict_get(as->metadata, "role", NULL, 0);
832 if (role)
833 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
834 if (as->descriptor)
835 avio_printf(out, "\t\t\t%s\n", as->descriptor);
836 for (i = 0; i < s->nb_streams; i++) {
837 AVStream *st = s->streams[i];
838 OutputStream *os = &c->streams[i];
839 char bandwidth_str[64] = {'\0'};
840
841 if (os->as_idx - 1 != as_index)
842 continue;
843
844 if (os->bit_rate > 0)
845 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->bit_rate);
846 else if (final) {
847 int average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
848 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", average_bit_rate);
849 } else if (os->first_segment_bit_rate > 0)
850 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->first_segment_bit_rate);
851
852 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
853 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
854 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
855 if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
856 avio_printf(out, " scanType=\"unknown\"");
857 else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
858 avio_printf(out, " scanType=\"interlaced\"");
859 avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
860 if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
861 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
862 if (as->trick_idx >= 0) {
863 AdaptationSet *tas = &c->as[as->trick_idx];
864 if (!as->ambiguous_frame_rate && !tas->ambiguous_frame_rate)
865 avio_printf(out, " maxPlayoutRate=\"%d\"", FFMAX((int)av_q2d(av_div_q(tas->min_frame_rate, as->min_frame_rate)), 1));
866 }
867 if (!os->coding_dependency)
868 avio_printf(out, " codingDependency=\"false\"");
869 avio_printf(out, ">\n");
870 } else {
871 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
872 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
873 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
874 s->streams[i]->codecpar->channels);
875 }
876 if (!final && c->write_prft && os->producer_reference_time_str[0]) {
877 avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"%s\" wallClockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
878 i, os->producer_reference_time.flags ? "captured" : "encoder", os->producer_reference_time_str, c->presentation_time_offset);
879 avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
880 avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
881 }
882 if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE && !(c->profile & MPD_PROFILE_DVB) &&
883 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
884 avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
885 output_segment_list(os, out, s, i, final);
886 avio_printf(out, "\t\t\t</Representation>\n");
887 }
888 avio_printf(out, "\t\t</AdaptationSet>\n");
889
890 return 0;
891 }
892
add_adaptation_set(AVFormatContext * s,AdaptationSet ** as,enum AVMediaType type)893 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
894 {
895 DASHContext *c = s->priv_data;
896 void *mem;
897
898 if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
899 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
900 return AVERROR(EINVAL);
901 }
902 mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
903 if (!mem)
904 return AVERROR(ENOMEM);
905 c->as = mem;
906 ++c->nb_as;
907
908 *as = &c->as[c->nb_as - 1];
909 memset(*as, 0, sizeof(**as));
910 (*as)->media_type = type;
911 (*as)->frag_type = -1;
912 (*as)->trick_idx = -1;
913
914 return 0;
915 }
916
adaptation_set_add_stream(AVFormatContext * s,int as_idx,int i)917 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
918 {
919 DASHContext *c = s->priv_data;
920 AdaptationSet *as = &c->as[as_idx - 1];
921 OutputStream *os = &c->streams[i];
922
923 if (as->media_type != s->streams[i]->codecpar->codec_type) {
924 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
925 return AVERROR(EINVAL);
926 } else if (os->as_idx) {
927 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
928 return AVERROR(EINVAL);
929 }
930 if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
931 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
932 return AVERROR(EINVAL);
933 }
934 os->as_idx = as_idx;
935 ++as->nb_streams;
936
937 return 0;
938 }
939
parse_adaptation_sets(AVFormatContext * s)940 static int parse_adaptation_sets(AVFormatContext *s)
941 {
942 DASHContext *c = s->priv_data;
943 const char *p = c->adaptation_sets;
944 enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
945 AdaptationSet *as;
946 int i, n, ret;
947
948 // default: one AdaptationSet for each stream
949 if (!p) {
950 for (i = 0; i < s->nb_streams; i++) {
951 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
952 return ret;
953 as->id = i;
954
955 c->streams[i].as_idx = c->nb_as;
956 ++as->nb_streams;
957 }
958 goto end;
959 }
960
961 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
962 // option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
963 // option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2
964 // id=1,trick_id=0,seg_duration=10,frag_type=none,streams=3 and so on
965 // descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
966 // descriptor_str should be a self-closing xml tag.
967 // seg_duration and frag_duration have the same syntax as the global options of
968 // the same name, and the former have precedence over them if set.
969 state = new_set;
970 while (*p) {
971 if (*p == ' ') {
972 p++;
973 continue;
974 } else if (state == new_set && av_strstart(p, "id=", &p)) {
975 char id_str[10], *end_str;
976
977 n = strcspn(p, ",");
978 snprintf(id_str, sizeof(id_str), "%.*s", n, p);
979
980 i = strtol(id_str, &end_str, 10);
981 if (id_str == end_str || i < 0 || i > c->nb_as) {
982 av_log(s, AV_LOG_ERROR, "\"%s\" is not a valid value for an AdaptationSet id\n", id_str);
983 return AVERROR(EINVAL);
984 }
985
986 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
987 return ret;
988 as->id = i;
989
990 p += n;
991 if (*p)
992 p++;
993 state = parse_default;
994 } else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
995 state = parse_seg_duration;
996 } else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
997 state = parse_frag_duration;
998 } else if (state == parse_seg_duration || state == parse_frag_duration) {
999 char str[32];
1000 int64_t usecs = 0;
1001
1002 n = strcspn(p, ",");
1003 snprintf(str, sizeof(str), "%.*s", n, p);
1004 p += n;
1005 if (*p)
1006 p++;
1007
1008 ret = av_parse_time(&usecs, str, 1);
1009 if (ret < 0) {
1010 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
1011 return ret;
1012 }
1013
1014 if (state == parse_seg_duration)
1015 as->seg_duration = usecs;
1016 else
1017 as->frag_duration = usecs;
1018 state = parse_default;
1019 } else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
1020 char type_str[16];
1021
1022 n = strcspn(p, ",");
1023 snprintf(type_str, sizeof(type_str), "%.*s", n, p);
1024 p += n;
1025 if (*p)
1026 p++;
1027
1028 if (!strcmp(type_str, "duration"))
1029 as->frag_type = FRAG_TYPE_DURATION;
1030 else if (!strcmp(type_str, "pframes"))
1031 as->frag_type = FRAG_TYPE_PFRAMES;
1032 else if (!strcmp(type_str, "every_frame"))
1033 as->frag_type = FRAG_TYPE_EVERY_FRAME;
1034 else if (!strcmp(type_str, "none"))
1035 as->frag_type = FRAG_TYPE_NONE;
1036 else {
1037 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
1038 return ret;
1039 }
1040 state = parse_default;
1041 } else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
1042 n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
1043 if (n < strlen(p)) {
1044 as->descriptor = av_strndup(p, n);
1045 } else {
1046 av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
1047 return AVERROR(EINVAL);
1048 }
1049 p += n;
1050 if (*p)
1051 p++;
1052 state = parse_default;
1053 } else if ((state != new_set) && av_strstart(p, "trick_id=", &p)) {
1054 char trick_id_str[10], *end_str;
1055
1056 n = strcspn(p, ",");
1057 snprintf(trick_id_str, sizeof(trick_id_str), "%.*s", n, p);
1058 p += n;
1059
1060 as->trick_idx = strtol(trick_id_str, &end_str, 10);
1061 if (trick_id_str == end_str || as->trick_idx < 0)
1062 return AVERROR(EINVAL);
1063
1064 if (*p)
1065 p++;
1066 state = parse_default;
1067 } else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
1068 state = parsing_streams;
1069 } else if (state == parsing_streams) {
1070 AdaptationSet *as = &c->as[c->nb_as - 1];
1071 char idx_str[8], *end_str;
1072
1073 n = strcspn(p, " ,");
1074 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
1075 p += n;
1076
1077 // if value is "a" or "v", map all streams of that type
1078 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
1079 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
1080 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
1081
1082 for (i = 0; i < s->nb_streams; i++) {
1083 if (s->streams[i]->codecpar->codec_type != type)
1084 continue;
1085
1086 as->media_type = s->streams[i]->codecpar->codec_type;
1087
1088 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1089 return ret;
1090 }
1091 } else { // select single stream
1092 i = strtol(idx_str, &end_str, 10);
1093 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
1094 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
1095 return AVERROR(EINVAL);
1096 }
1097 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
1098
1099 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
1100 as->media_type = s->streams[i]->codecpar->codec_type;
1101 }
1102
1103 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1104 return ret;
1105 }
1106
1107 if (*p == ' ')
1108 state = new_set;
1109 if (*p)
1110 p++;
1111 } else {
1112 return AVERROR(EINVAL);
1113 }
1114 }
1115
1116 end:
1117 // check for unassigned streams
1118 for (i = 0; i < s->nb_streams; i++) {
1119 OutputStream *os = &c->streams[i];
1120 if (!os->as_idx) {
1121 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
1122 return AVERROR(EINVAL);
1123 }
1124 }
1125
1126 // check references for trick mode AdaptationSet
1127 for (i = 0; i < c->nb_as; i++) {
1128 as = &c->as[i];
1129 if (as->trick_idx < 0)
1130 continue;
1131 for (n = 0; n < c->nb_as; n++) {
1132 if (c->as[n].id == as->trick_idx)
1133 break;
1134 }
1135 if (n >= c->nb_as) {
1136 av_log(s, AV_LOG_ERROR, "reference AdaptationSet id \"%d\" not found for trick mode AdaptationSet id \"%d\"\n", as->trick_idx, as->id);
1137 return AVERROR(EINVAL);
1138 }
1139 }
1140
1141 return 0;
1142 }
1143
write_manifest(AVFormatContext * s,int final)1144 static int write_manifest(AVFormatContext *s, int final)
1145 {
1146 DASHContext *c = s->priv_data;
1147 AVIOContext *out;
1148 char temp_filename[1024];
1149 int ret, i;
1150 const char *proto = avio_find_protocol_name(s->url);
1151 int use_rename = proto && !strcmp(proto, "file");
1152 static unsigned int warned_non_file = 0;
1153 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1154 AVDictionary *opts = NULL;
1155
1156 if (!use_rename && !warned_non_file++)
1157 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1158
1159 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1160 set_http_options(&opts, c);
1161 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1162 av_dict_free(&opts);
1163 if (ret < 0) {
1164 return handle_io_open_error(s, ret, temp_filename);
1165 }
1166 out = c->mpd_out;
1167 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1168 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1169 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1170 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1171 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1172 "\tprofiles=\"");
1173 if (c->profile & MPD_PROFILE_DASH)
1174 avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1175 if (c->profile & MPD_PROFILE_DVB)
1176 avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1177 avio_printf(out, "\ttype=\"%s\"\n",
1178 final ? "static" : "dynamic");
1179 if (final) {
1180 avio_printf(out, "\tmediaPresentationDuration=\"");
1181 write_time(out, c->total_duration);
1182 avio_printf(out, "\"\n");
1183 } else {
1184 int64_t update_period = c->last_duration / AV_TIME_BASE;
1185 char now_str[100];
1186 if (c->use_template && !c->use_timeline)
1187 update_period = 500;
1188 if (c->update_period)
1189 update_period = c->update_period;
1190 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1191 if (!c->ldash)
1192 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1193 if (c->availability_start_time[0])
1194 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1195 format_date(now_str, sizeof(now_str), av_gettime());
1196 if (now_str[0])
1197 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1198 if (c->window_size && c->use_template) {
1199 avio_printf(out, "\ttimeShiftBufferDepth=\"");
1200 write_time(out, c->last_duration * c->window_size);
1201 avio_printf(out, "\"\n");
1202 }
1203 }
1204 avio_printf(out, "\tmaxSegmentDuration=\"");
1205 write_time(out, c->max_segment_duration);
1206 avio_printf(out, "\"\n");
1207 avio_printf(out, "\tminBufferTime=\"");
1208 write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1209 avio_printf(out, "\">\n");
1210 avio_printf(out, "\t<ProgramInformation>\n");
1211 if (title) {
1212 char *escaped = xmlescape(title->value);
1213 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1214 av_free(escaped);
1215 }
1216 avio_printf(out, "\t</ProgramInformation>\n");
1217
1218 avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1219 if (!final && c->target_latency && c->target_latency_refid >= 0) {
1220 avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1221 if (s->nb_streams > 1)
1222 avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1223 avio_printf(out, "/>\n");
1224 }
1225 if (av_cmp_q(c->min_playback_rate, (AVRational) {1, 1}) ||
1226 av_cmp_q(c->max_playback_rate, (AVRational) {1, 1}))
1227 avio_printf(out, "\t\t<PlaybackRate min=\"%.2f\" max=\"%.2f\"/>\n",
1228 av_q2d(c->min_playback_rate), av_q2d(c->max_playback_rate));
1229 avio_printf(out, "\t</ServiceDescription>\n");
1230
1231 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1232 OutputStream *os = &c->streams[0];
1233 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1234 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1235 avio_printf(out, "\t<Period id=\"0\" start=\"");
1236 write_time(out, start_time);
1237 avio_printf(out, "\">\n");
1238 } else {
1239 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1240 }
1241
1242 for (i = 0; i < c->nb_as; i++) {
1243 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1244 return ret;
1245 }
1246 avio_printf(out, "\t</Period>\n");
1247
1248 if (c->utc_timing_url)
1249 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1250
1251 avio_printf(out, "</MPD>\n");
1252 avio_flush(out);
1253 dashenc_io_close(s, &c->mpd_out, temp_filename);
1254
1255 if (use_rename) {
1256 if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1257 return ret;
1258 }
1259
1260 if (c->hls_playlist) {
1261 char filename_hls[1024];
1262 const char *audio_group = "A1";
1263 char audio_codec_str[128] = "\0";
1264 int is_default = 1;
1265 int max_audio_bitrate = 0;
1266
1267 // Publish master playlist only the configured rate
1268 if (c->master_playlist_created && (!c->master_publish_rate ||
1269 c->streams[0].segment_index % c->master_publish_rate))
1270 return 0;
1271
1272 if (*c->dirname)
1273 snprintf(filename_hls, sizeof(filename_hls), "%s%s", c->dirname, c->hls_master_name);
1274 else
1275 snprintf(filename_hls, sizeof(filename_hls), "%s", c->hls_master_name);
1276
1277 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1278
1279 set_http_options(&opts, c);
1280 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1281 av_dict_free(&opts);
1282 if (ret < 0) {
1283 return handle_io_open_error(s, ret, temp_filename);
1284 }
1285
1286 ff_hls_write_playlist_version(c->m3u8_out, 7);
1287
1288 for (i = 0; i < s->nb_streams; i++) {
1289 char playlist_file[64];
1290 AVStream *st = s->streams[i];
1291 OutputStream *os = &c->streams[i];
1292 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1293 continue;
1294 if (os->segment_type != SEGMENT_TYPE_MP4)
1295 continue;
1296 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1297 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1298 playlist_file, NULL, i, is_default);
1299 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1300 os->muxer_overhead, max_audio_bitrate);
1301 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1302 if (strlen(audio_codec_str))
1303 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1304 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1305 }
1306 is_default = 0;
1307 }
1308
1309 for (i = 0; i < s->nb_streams; i++) {
1310 char playlist_file[64];
1311 char codec_str[128];
1312 AVStream *st = s->streams[i];
1313 OutputStream *os = &c->streams[i];
1314 char *agroup = NULL;
1315 char *codec_str_ptr = NULL;
1316 int stream_bitrate = os->muxer_overhead;
1317 if (os->bit_rate > 0)
1318 stream_bitrate += os->bit_rate;
1319 else if (final)
1320 stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1321 else if (os->first_segment_bit_rate > 0)
1322 stream_bitrate += os->first_segment_bit_rate;
1323 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1324 continue;
1325 if (os->segment_type != SEGMENT_TYPE_MP4)
1326 continue;
1327 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1328 if (max_audio_bitrate) {
1329 agroup = (char *)audio_group;
1330 stream_bitrate += max_audio_bitrate;
1331 av_strlcat(codec_str, ",", sizeof(codec_str));
1332 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1333 }
1334 if (st->codecpar->codec_id != AV_CODEC_ID_HEVC) {
1335 codec_str_ptr = codec_str;
1336 }
1337 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1338 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1339 playlist_file, agroup,
1340 codec_str_ptr, NULL, NULL);
1341 }
1342 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1343 if (use_rename)
1344 if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1345 return ret;
1346 c->master_playlist_created = 1;
1347 }
1348
1349 return 0;
1350 }
1351
dict_copy_entry(AVDictionary ** dst,const AVDictionary * src,const char * key)1352 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1353 {
1354 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1355 if (entry)
1356 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1357 return 0;
1358 }
1359
dash_init(AVFormatContext * s)1360 static int dash_init(AVFormatContext *s)
1361 {
1362 DASHContext *c = s->priv_data;
1363 int ret = 0, i;
1364 char *ptr;
1365 char basename[1024];
1366
1367 c->nr_of_streams_to_flush = 0;
1368 if (c->single_file_name)
1369 c->single_file = 1;
1370 if (c->single_file)
1371 c->use_template = 0;
1372
1373 if (!c->profile) {
1374 av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1375 return AVERROR(EINVAL);
1376 }
1377 #if FF_API_DASH_MIN_SEG_DURATION
1378 if (c->min_seg_duration != 5000000) {
1379 av_log(s, AV_LOG_WARNING, "The min_seg_duration option is deprecated and will be removed. Please use the -seg_duration\n");
1380 c->seg_duration = c->min_seg_duration;
1381 }
1382 #endif
1383 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1384 av_log(s, AV_LOG_ERROR,
1385 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1386 return AVERROR_EXPERIMENTAL;
1387 }
1388
1389 if (c->lhls && !c->streaming) {
1390 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as streaming is not enabled\n");
1391 c->lhls = 0;
1392 }
1393
1394 if (c->lhls && !c->hls_playlist) {
1395 av_log(s, AV_LOG_WARNING, "LHLS option will be ignored as hls_playlist is not enabled\n");
1396 c->lhls = 0;
1397 }
1398
1399 if (c->ldash && !c->streaming) {
1400 av_log(s, AV_LOG_WARNING, "LDash option will be ignored as streaming is not enabled\n");
1401 c->ldash = 0;
1402 }
1403
1404 if (c->target_latency && !c->streaming) {
1405 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1406 c->target_latency = 0;
1407 }
1408
1409 if (c->global_sidx && !c->single_file) {
1410 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1411 c->global_sidx = 0;
1412 }
1413
1414 if (c->global_sidx && c->streaming) {
1415 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1416 c->global_sidx = 0;
1417 }
1418 if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1419 av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1420 c->frag_type = FRAG_TYPE_EVERY_FRAME;
1421 }
1422
1423 if (c->write_prft < 0) {
1424 c->write_prft = c->ldash;
1425 if (c->ldash)
1426 av_log(s, AV_LOG_VERBOSE, "Enabling Producer Reference Time element for Low Latency mode\n");
1427 }
1428
1429 if (c->write_prft && !c->utc_timing_url) {
1430 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1431 c->write_prft = 0;
1432 }
1433
1434 if (c->write_prft && !c->streaming) {
1435 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1436 c->write_prft = 0;
1437 }
1438
1439 if (c->ldash && !c->write_prft) {
1440 av_log(s, AV_LOG_WARNING, "Low Latency mode enabled without Producer Reference Time element option! Resulting manifest may not be complaint\n");
1441 }
1442
1443 if (c->target_latency && !c->write_prft) {
1444 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1445 c->target_latency = 0;
1446 }
1447
1448 if (av_cmp_q(c->max_playback_rate, c->min_playback_rate) < 0) {
1449 av_log(s, AV_LOG_WARNING, "Minimum playback rate value is higer than the Maximum. Both will be ignored\n");
1450 c->min_playback_rate = c->max_playback_rate = (AVRational) {1, 1};
1451 }
1452
1453 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1454 ptr = strrchr(c->dirname, '/');
1455 if (ptr) {
1456 av_strlcpy(basename, &ptr[1], sizeof(basename));
1457 ptr[1] = '\0';
1458 } else {
1459 c->dirname[0] = '\0';
1460 av_strlcpy(basename, s->url, sizeof(basename));
1461 }
1462
1463 ptr = strrchr(basename, '.');
1464 if (ptr)
1465 *ptr = '\0';
1466
1467 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1468 if (!c->streams)
1469 return AVERROR(ENOMEM);
1470
1471 if ((ret = parse_adaptation_sets(s)) < 0)
1472 return ret;
1473
1474 if ((ret = init_segment_types(s)) < 0)
1475 return ret;
1476
1477 for (i = 0; i < s->nb_streams; i++) {
1478 OutputStream *os = &c->streams[i];
1479 AdaptationSet *as = &c->as[os->as_idx - 1];
1480 AVFormatContext *ctx;
1481 AVStream *st;
1482 AVDictionary *opts = NULL;
1483 char filename[1024];
1484
1485 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1486 if (!os->bit_rate) {
1487 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1488 AV_LOG_ERROR : AV_LOG_WARNING;
1489 av_log(s, level, "No bit rate set for stream %d\n", i);
1490 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1491 return AVERROR(EINVAL);
1492 }
1493
1494 // copy AdaptationSet language and role from stream metadata
1495 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1496 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1497
1498 if (c->init_seg_name) {
1499 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1500 if (!os->init_seg_name)
1501 return AVERROR(ENOMEM);
1502 }
1503 if (c->media_seg_name) {
1504 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1505 if (!os->media_seg_name)
1506 return AVERROR(ENOMEM);
1507 }
1508 if (c->single_file_name) {
1509 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1510 if (!os->single_file_name)
1511 return AVERROR(ENOMEM);
1512 }
1513
1514 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1515 if ((!c->single_file && check_file_extension(os->init_seg_name, os->format_name) != 0) ||
1516 (!c->single_file && check_file_extension(os->media_seg_name, os->format_name) != 0) ||
1517 (c->single_file && check_file_extension(os->single_file_name, os->format_name) != 0)) {
1518 av_log(s, AV_LOG_WARNING,
1519 "One or many segment file names doesn't end with .webm. "
1520 "Override -init_seg_name and/or -media_seg_name and/or "
1521 "-single_file_name to end with the extension .webm\n");
1522 }
1523 if (c->streaming) {
1524 // Streaming not supported as matroskaenc buffers internally before writing the output
1525 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1526 c->streaming = 0;
1527 }
1528 }
1529
1530 os->ctx = ctx = avformat_alloc_context();
1531 if (!ctx)
1532 return AVERROR(ENOMEM);
1533
1534 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1535 if (!ctx->oformat)
1536 return AVERROR_MUXER_NOT_FOUND;
1537 ctx->interrupt_callback = s->interrupt_callback;
1538 ctx->opaque = s->opaque;
1539 ctx->io_close = s->io_close;
1540 ctx->io_open = s->io_open;
1541 ctx->strict_std_compliance = s->strict_std_compliance;
1542
1543 if (!(st = avformat_new_stream(ctx, NULL)))
1544 return AVERROR(ENOMEM);
1545 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1546 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1547 st->time_base = s->streams[i]->time_base;
1548 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1549 ctx->avoid_negative_ts = s->avoid_negative_ts;
1550 ctx->flags = s->flags;
1551
1552 os->parser = av_parser_init(st->codecpar->codec_id);
1553 if (os->parser) {
1554 os->parser_avctx = avcodec_alloc_context3(NULL);
1555 if (!os->parser_avctx)
1556 return AVERROR(ENOMEM);
1557 ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1558 if (ret < 0)
1559 return ret;
1560 // We only want to parse frame headers
1561 os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1562 }
1563
1564 if (c->single_file) {
1565 if (os->single_file_name)
1566 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1567 else
1568 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1569 } else {
1570 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1571 }
1572 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1573 set_http_options(&opts, c);
1574 if (!c->single_file) {
1575 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1576 return ret;
1577 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1578 } else {
1579 ctx->url = av_strdup(filename);
1580 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1581 }
1582 av_dict_free(&opts);
1583 if (ret < 0)
1584 return ret;
1585 os->init_start_pos = 0;
1586
1587 av_dict_copy(&opts, c->format_options, 0);
1588 if (!as->seg_duration)
1589 as->seg_duration = c->seg_duration;
1590 if (!as->frag_duration)
1591 as->frag_duration = c->frag_duration;
1592 if (as->frag_type < 0)
1593 as->frag_type = c->frag_type;
1594 os->seg_duration = as->seg_duration;
1595 os->frag_duration = as->frag_duration;
1596 os->frag_type = as->frag_type;
1597
1598 c->max_segment_duration = FFMAX(c->max_segment_duration, as->seg_duration);
1599
1600 if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1601 av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1602 return AVERROR(EINVAL);
1603 }
1604
1605 if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1606 av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1607 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1608 }
1609 if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1610 av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1611 return AVERROR(EINVAL);
1612 }
1613 if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1614 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1615 av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1616 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1617 }
1618 if (os->frag_type != FRAG_TYPE_PFRAMES && as->trick_idx < 0)
1619 // Set this now if a parser isn't used
1620 os->coding_dependency = 1;
1621
1622 if (os->segment_type == SEGMENT_TYPE_MP4) {
1623 if (c->streaming)
1624 // skip_sidx : Reduce bitrate overhead
1625 // skip_trailer : Avoids growing memory usage with time
1626 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1627 else {
1628 if (c->global_sidx)
1629 av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1630 else
1631 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1632 }
1633 if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1634 av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1635 else
1636 av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1637 if (os->frag_type == FRAG_TYPE_DURATION)
1638 av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1639 if (c->write_prft)
1640 av_dict_set(&opts, "write_prft", "wallclock", 0);
1641 } else {
1642 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1643 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1644 av_dict_set_int(&opts, "dash", 1, 0);
1645 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1646 av_dict_set_int(&opts, "live", 1, 0);
1647 }
1648 ret = avformat_init_output(ctx, &opts);
1649 av_dict_free(&opts);
1650 if (ret < 0)
1651 return ret;
1652 os->ctx_inited = 1;
1653 avio_flush(ctx->pb);
1654
1655 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1656
1657 s->streams[i]->time_base = st->time_base;
1658 // If the muxer wants to shift timestamps, request to have them shifted
1659 // already before being handed to this muxer, so we don't have mismatches
1660 // between the MPD and the actual segments.
1661 s->avoid_negative_ts = ctx->avoid_negative_ts;
1662 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1663 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1664 AVRational par;
1665 if (avg_frame_rate.num > 0) {
1666 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1667 as->min_frame_rate = avg_frame_rate;
1668 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1669 as->max_frame_rate = avg_frame_rate;
1670 } else {
1671 as->ambiguous_frame_rate = 1;
1672 }
1673
1674 if (st->codecpar->width > as->max_width)
1675 as->max_width = st->codecpar->width;
1676 if (st->codecpar->height > as->max_height)
1677 as->max_height = st->codecpar->height;
1678
1679 if (st->sample_aspect_ratio.num)
1680 os->sar = st->sample_aspect_ratio;
1681 else
1682 os->sar = (AVRational){1,1};
1683 av_reduce(&par.num, &par.den,
1684 st->codecpar->width * (int64_t)os->sar.num,
1685 st->codecpar->height * (int64_t)os->sar.den,
1686 1024 * 1024);
1687
1688 if (as->par.num && av_cmp_q(par, as->par)) {
1689 av_log(s, AV_LOG_ERROR, "Conflicting stream aspect ratios values in Adaptation Set %d. Please ensure all adaptation sets have the same aspect ratio\n", os->as_idx);
1690 return AVERROR(EINVAL);
1691 }
1692 as->par = par;
1693
1694 c->has_video = 1;
1695 }
1696
1697 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1698 sizeof(os->codec_str));
1699 os->first_pts = AV_NOPTS_VALUE;
1700 os->max_pts = AV_NOPTS_VALUE;
1701 os->last_dts = AV_NOPTS_VALUE;
1702 os->segment_index = 1;
1703
1704 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1705 c->nr_of_streams_to_flush++;
1706 }
1707
1708 if (!c->has_video && c->seg_duration <= 0) {
1709 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1710 return AVERROR(EINVAL);
1711 }
1712 if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1713 av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1714
1715 c->nr_of_streams_flushed = 0;
1716 c->target_latency_refid = -1;
1717
1718 return 0;
1719 }
1720
dash_write_header(AVFormatContext * s)1721 static int dash_write_header(AVFormatContext *s)
1722 {
1723 DASHContext *c = s->priv_data;
1724 int i, ret;
1725 for (i = 0; i < s->nb_streams; i++) {
1726 OutputStream *os = &c->streams[i];
1727 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1728 return ret;
1729
1730 // Flush init segment
1731 // Only for WebM segment, since for mp4 delay_moov is set and
1732 // the init segment is thus flushed after the first packets.
1733 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1734 (ret = flush_init_segment(s, os)) < 0)
1735 return ret;
1736 }
1737 return ret;
1738 }
1739
add_segment(OutputStream * os,const char * file,int64_t time,int64_t duration,int64_t start_pos,int64_t range_length,int64_t index_length,int next_exp_index)1740 static int add_segment(OutputStream *os, const char *file,
1741 int64_t time, int64_t duration,
1742 int64_t start_pos, int64_t range_length,
1743 int64_t index_length, int next_exp_index)
1744 {
1745 int err;
1746 Segment *seg;
1747 if (os->nb_segments >= os->segments_size) {
1748 os->segments_size = (os->segments_size + 1) * 2;
1749 if ((err = av_reallocp_array(&os->segments, sizeof(*os->segments),
1750 os->segments_size)) < 0) {
1751 os->segments_size = 0;
1752 os->nb_segments = 0;
1753 return err;
1754 }
1755 }
1756 seg = av_mallocz(sizeof(*seg));
1757 if (!seg)
1758 return AVERROR(ENOMEM);
1759 av_strlcpy(seg->file, file, sizeof(seg->file));
1760 seg->time = time;
1761 seg->duration = duration;
1762 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1763 seg->duration += seg->time;
1764 seg->time = 0;
1765 }
1766 seg->start_pos = start_pos;
1767 seg->range_length = range_length;
1768 seg->index_length = index_length;
1769 os->segments[os->nb_segments++] = seg;
1770 os->segment_index++;
1771 //correcting the segment index if it has fallen behind the expected value
1772 if (os->segment_index < next_exp_index) {
1773 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1774 file, os->segment_index, next_exp_index);
1775 os->segment_index = next_exp_index;
1776 }
1777 return 0;
1778 }
1779
write_styp(AVIOContext * pb)1780 static void write_styp(AVIOContext *pb)
1781 {
1782 avio_wb32(pb, 24);
1783 ffio_wfourcc(pb, "styp");
1784 ffio_wfourcc(pb, "msdh");
1785 avio_wb32(pb, 0); /* minor */
1786 ffio_wfourcc(pb, "msdh");
1787 ffio_wfourcc(pb, "msix");
1788 }
1789
find_index_range(AVFormatContext * s,const char * full_path,int64_t pos,int * index_length)1790 static void find_index_range(AVFormatContext *s, const char *full_path,
1791 int64_t pos, int *index_length)
1792 {
1793 uint8_t buf[8];
1794 AVIOContext *pb;
1795 int ret;
1796
1797 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1798 if (ret < 0)
1799 return;
1800 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1801 ff_format_io_close(s, &pb);
1802 return;
1803 }
1804 ret = avio_read(pb, buf, 8);
1805 ff_format_io_close(s, &pb);
1806 if (ret < 8)
1807 return;
1808 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1809 return;
1810 *index_length = AV_RB32(&buf[0]);
1811 }
1812
update_stream_extradata(AVFormatContext * s,OutputStream * os,AVPacket * pkt,AVRational * frame_rate)1813 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1814 AVPacket *pkt, AVRational *frame_rate)
1815 {
1816 AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1817 uint8_t *extradata;
1818 buffer_size_t extradata_size;
1819 int ret;
1820
1821 if (par->extradata_size)
1822 return 0;
1823
1824 extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1825 if (!extradata_size)
1826 return 0;
1827
1828 ret = ff_alloc_extradata(par, extradata_size);
1829 if (ret < 0)
1830 return ret;
1831
1832 memcpy(par->extradata, extradata, extradata_size);
1833
1834 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1835
1836 return 0;
1837 }
1838
dashenc_delete_file(AVFormatContext * s,char * filename)1839 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1840 DASHContext *c = s->priv_data;
1841 int http_base_proto = ff_is_http_proto(filename);
1842
1843 if (http_base_proto) {
1844 AVIOContext *out = NULL;
1845 AVDictionary *http_opts = NULL;
1846
1847 set_http_options(&http_opts, c);
1848 av_dict_set(&http_opts, "method", "DELETE", 0);
1849
1850 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1851 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1852 }
1853
1854 av_dict_free(&http_opts);
1855 ff_format_io_close(s, &out);
1856 } else {
1857 int res = avpriv_io_delete(filename);
1858 if (res < 0) {
1859 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1860 av_strerror(res, errbuf, sizeof(errbuf));
1861 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1862 }
1863 }
1864 }
1865
dashenc_delete_segment_file(AVFormatContext * s,const char * file)1866 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1867 {
1868 DASHContext *c = s->priv_data;
1869 AVBPrint buf;
1870
1871 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1872
1873 av_bprintf(&buf, "%s%s", c->dirname, file);
1874 if (!av_bprint_is_complete(&buf)) {
1875 av_bprint_finalize(&buf, NULL);
1876 av_log(s, AV_LOG_WARNING, "Out of memory for filename\n");
1877 return AVERROR(ENOMEM);
1878 }
1879
1880 dashenc_delete_file(s, buf.str);
1881
1882 av_bprint_finalize(&buf, NULL);
1883 return 0;
1884 }
1885
dashenc_delete_media_segments(AVFormatContext * s,OutputStream * os,int remove_count)1886 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1887 {
1888 for (int i = 0; i < remove_count; ++i) {
1889 dashenc_delete_segment_file(s, os->segments[i]->file);
1890
1891 // Delete the segment regardless of whether the file was successfully deleted
1892 av_free(os->segments[i]);
1893 }
1894
1895 os->nb_segments -= remove_count;
1896 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1897 }
1898
dash_flush(AVFormatContext * s,int final,int stream)1899 static int dash_flush(AVFormatContext *s, int final, int stream)
1900 {
1901 DASHContext *c = s->priv_data;
1902 int i, ret = 0;
1903
1904 const char *proto = avio_find_protocol_name(s->url);
1905 int use_rename = proto && !strcmp(proto, "file");
1906
1907 int cur_flush_segment_index = 0, next_exp_index = -1;
1908 if (stream >= 0) {
1909 cur_flush_segment_index = c->streams[stream].segment_index;
1910
1911 //finding the next segment's expected index, based on the current pts value
1912 if (c->use_template && !c->use_timeline && c->index_correction &&
1913 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1914 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1915 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1916 c->streams[stream].first_pts,
1917 s->streams[stream]->time_base,
1918 AV_TIME_BASE_Q);
1919 next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1920 }
1921 }
1922
1923 for (i = 0; i < s->nb_streams; i++) {
1924 OutputStream *os = &c->streams[i];
1925 AVStream *st = s->streams[i];
1926 int range_length, index_length = 0;
1927 int64_t duration;
1928
1929 if (!os->packets_written)
1930 continue;
1931
1932 // Flush the single stream that got a keyframe right now.
1933 // Flush all audio streams as well, in sync with video keyframes,
1934 // but not the other video streams.
1935 if (stream >= 0 && i != stream) {
1936 if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1937 s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1938 continue;
1939 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1940 continue;
1941 // Make sure we don't flush audio streams multiple times, when
1942 // all video streams are flushed one at a time.
1943 if (c->has_video && os->segment_index > cur_flush_segment_index)
1944 continue;
1945 }
1946
1947 if (c->single_file)
1948 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1949
1950 ret = flush_dynbuf(c, os, &range_length);
1951 if (ret < 0)
1952 break;
1953 os->packets_written = 0;
1954
1955 if (c->single_file) {
1956 find_index_range(s, os->full_path, os->pos, &index_length);
1957 } else {
1958 dashenc_io_close(s, &os->out, os->temp_path);
1959
1960 if (use_rename) {
1961 ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1962 if (ret < 0)
1963 break;
1964 }
1965 }
1966
1967 duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
1968 os->last_duration = FFMAX(os->last_duration, duration);
1969
1970 if (!os->muxer_overhead && os->max_pts > os->start_pts)
1971 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1972 8 * AV_TIME_BASE) / duration;
1973 os->total_pkt_size = 0;
1974 os->total_pkt_duration = 0;
1975
1976 if (!os->bit_rate && !os->first_segment_bit_rate) {
1977 os->first_segment_bit_rate = (int64_t) range_length * 8 * AV_TIME_BASE / duration;
1978 }
1979 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1980 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1981
1982 os->pos += range_length;
1983 }
1984
1985 if (c->window_size) {
1986 for (i = 0; i < s->nb_streams; i++) {
1987 OutputStream *os = &c->streams[i];
1988 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1989 if (remove_count > 0)
1990 dashenc_delete_media_segments(s, os, remove_count);
1991 }
1992 }
1993
1994 if (final) {
1995 for (i = 0; i < s->nb_streams; i++) {
1996 OutputStream *os = &c->streams[i];
1997 if (os->ctx && os->ctx_inited) {
1998 int64_t file_size = avio_tell(os->ctx->pb);
1999 av_write_trailer(os->ctx);
2000 if (c->global_sidx) {
2001 int j, start_index, start_number;
2002 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
2003 get_start_index_number(os, c, &start_index, &start_number);
2004 if (start_index >= os->nb_segments ||
2005 os->segment_type != SEGMENT_TYPE_MP4)
2006 continue;
2007 os->init_range_length += sidx_size;
2008 for (j = start_index; j < os->nb_segments; j++) {
2009 Segment *seg = os->segments[j];
2010 seg->start_pos += sidx_size;
2011 }
2012 }
2013
2014 }
2015 }
2016 }
2017 if (ret >= 0) {
2018 if (c->has_video && !final) {
2019 c->nr_of_streams_flushed++;
2020 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
2021 return ret;
2022
2023 c->nr_of_streams_flushed = 0;
2024 }
2025 ret = write_manifest(s, final);
2026 }
2027 return ret;
2028 }
2029
dash_parse_prft(DASHContext * c,AVPacket * pkt)2030 static int dash_parse_prft(DASHContext *c, AVPacket *pkt)
2031 {
2032 OutputStream *os = &c->streams[pkt->stream_index];
2033 AVProducerReferenceTime *prft;
2034 buffer_size_t side_data_size;
2035
2036 prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
2037 if (!prft || side_data_size != sizeof(AVProducerReferenceTime) || (prft->flags && prft->flags != 24)) {
2038 // No encoder generated or user provided capture time AVProducerReferenceTime side data. Instead
2039 // of letting the mov muxer generate one, do it here so we can also use it for the manifest.
2040 prft = (AVProducerReferenceTime *)av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT,
2041 sizeof(AVProducerReferenceTime));
2042 if (!prft)
2043 return AVERROR(ENOMEM);
2044 prft->wallclock = av_gettime();
2045 prft->flags = 24;
2046 }
2047 if (os->first_pts == AV_NOPTS_VALUE) {
2048 os->producer_reference_time = *prft;
2049 if (c->target_latency_refid < 0)
2050 c->target_latency_refid = pkt->stream_index;
2051 }
2052
2053 return 0;
2054 }
2055
dash_write_packet(AVFormatContext * s,AVPacket * pkt)2056 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
2057 {
2058 DASHContext *c = s->priv_data;
2059 AVStream *st = s->streams[pkt->stream_index];
2060 OutputStream *os = &c->streams[pkt->stream_index];
2061 AdaptationSet *as = &c->as[os->as_idx - 1];
2062 int64_t seg_end_duration, elapsed_duration;
2063 int ret;
2064
2065 ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
2066 if (ret < 0)
2067 return ret;
2068
2069 // Fill in a heuristic guess of the packet duration, if none is available.
2070 // The mp4 muxer will do something similar (for the last packet in a fragment)
2071 // if nothing is set (setting it for the other packets doesn't hurt).
2072 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
2073 // invoke its heuristic (this doesn't have to be identical to that algorithm),
2074 // so that we know the exact timestamps of fragments.
2075 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
2076 pkt->duration = pkt->dts - os->last_dts;
2077 os->last_dts = pkt->dts;
2078
2079 // If forcing the stream to start at 0, the mp4 muxer will set the start
2080 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
2081 if (os->first_pts == AV_NOPTS_VALUE &&
2082 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
2083 pkt->pts -= pkt->dts;
2084 pkt->dts = 0;
2085 }
2086
2087 if (c->write_prft) {
2088 ret = dash_parse_prft(c, pkt);
2089 if (ret < 0)
2090 return ret;
2091 }
2092
2093 if (os->first_pts == AV_NOPTS_VALUE) {
2094 os->first_pts = pkt->pts;
2095 }
2096 os->last_pts = pkt->pts;
2097
2098 if (!c->availability_start_time[0]) {
2099 int64_t start_time_us = av_gettime();
2100 c->start_time_s = start_time_us / 1000000;
2101 format_date(c->availability_start_time,
2102 sizeof(c->availability_start_time), start_time_us);
2103 }
2104
2105 if (!os->packets_written)
2106 os->availability_time_offset = 0;
2107
2108 if (!os->availability_time_offset &&
2109 ((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
2110 (os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
2111 AdaptationSet *as = &c->as[os->as_idx - 1];
2112 int64_t frame_duration = 0;
2113
2114 switch (os->frag_type) {
2115 case FRAG_TYPE_DURATION:
2116 frame_duration = os->frag_duration;
2117 break;
2118 case FRAG_TYPE_EVERY_FRAME:
2119 frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2120 break;
2121 }
2122
2123 os->availability_time_offset = ((double) os->seg_duration -
2124 frame_duration) / AV_TIME_BASE;
2125 as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2126 }
2127
2128 if (c->use_template && !c->use_timeline) {
2129 elapsed_duration = pkt->pts - os->first_pts;
2130 seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2131 } else {
2132 elapsed_duration = pkt->pts - os->start_pts;
2133 seg_end_duration = os->seg_duration;
2134 }
2135
2136 if (os->parser &&
2137 (os->frag_type == FRAG_TYPE_PFRAMES ||
2138 as->trick_idx >= 0)) {
2139 // Parse the packets only in scenarios where it's needed
2140 uint8_t *data;
2141 int size;
2142 av_parser_parse2(os->parser, os->parser_avctx,
2143 &data, &size, pkt->data, pkt->size,
2144 pkt->pts, pkt->dts, pkt->pos);
2145
2146 os->coding_dependency |= os->parser->pict_type != AV_PICTURE_TYPE_I;
2147 }
2148
2149 if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2150 av_compare_ts(elapsed_duration, st->time_base,
2151 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2152 if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2153 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2154 st->time_base,
2155 AV_TIME_BASE_Q);
2156 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2157 st->time_base,
2158 AV_TIME_BASE_Q);
2159
2160 if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2161 if (c->last_duration < os->last_duration*9/10 ||
2162 c->last_duration > os->last_duration*11/10) {
2163 av_log(s, AV_LOG_WARNING,
2164 "Segment durations differ too much, enable use_timeline "
2165 "and use_template, or keep a stricter keyframe interval\n");
2166 }
2167 }
2168 }
2169
2170 if (c->write_prft && os->producer_reference_time.wallclock && !os->producer_reference_time_str[0])
2171 format_date(os->producer_reference_time_str,
2172 sizeof(os->producer_reference_time_str),
2173 os->producer_reference_time.wallclock);
2174
2175 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2176 return ret;
2177 }
2178
2179 if (!os->packets_written) {
2180 // If we wrote a previous segment, adjust the start time of the segment
2181 // to the end of the previous one (which is the same as the mp4 muxer
2182 // does). This avoids gaps in the timeline.
2183 if (os->max_pts != AV_NOPTS_VALUE)
2184 os->start_pts = os->max_pts;
2185 else
2186 os->start_pts = pkt->pts;
2187 }
2188 if (os->max_pts == AV_NOPTS_VALUE)
2189 os->max_pts = pkt->pts + pkt->duration;
2190 else
2191 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2192
2193 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2194 os->frag_type == FRAG_TYPE_PFRAMES &&
2195 os->packets_written) {
2196 av_assert0(os->parser);
2197 if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2198 st->codecpar->video_delay &&
2199 !(os->last_flags & AV_PKT_FLAG_KEY)) ||
2200 pkt->flags & AV_PKT_FLAG_KEY) {
2201 ret = av_write_frame(os->ctx, NULL);
2202 if (ret < 0)
2203 return ret;
2204
2205 if (!os->availability_time_offset) {
2206 int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2207 AV_TIME_BASE_Q);
2208 os->availability_time_offset = ((double) os->seg_duration -
2209 frag_duration) / AV_TIME_BASE;
2210 as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2211 }
2212 }
2213 }
2214
2215 if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size && as->trick_idx < 0) {
2216 os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2217 c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2218 }
2219
2220 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2221 return ret;
2222
2223 os->packets_written++;
2224 os->total_pkt_size += pkt->size;
2225 os->total_pkt_duration += pkt->duration;
2226 os->last_flags = pkt->flags;
2227
2228 if (!os->init_range_length)
2229 flush_init_segment(s, os);
2230
2231 //open the output context when the first frame of a segment is ready
2232 if (!c->single_file && os->packets_written == 1) {
2233 AVDictionary *opts = NULL;
2234 const char *proto = avio_find_protocol_name(s->url);
2235 int use_rename = proto && !strcmp(proto, "file");
2236 if (os->segment_type == SEGMENT_TYPE_MP4)
2237 write_styp(os->ctx->pb);
2238 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2239 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2240 os->media_seg_name, pkt->stream_index,
2241 os->segment_index, os->bit_rate, os->start_pts);
2242 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2243 os->filename);
2244 snprintf(os->temp_path, sizeof(os->temp_path),
2245 use_rename ? "%s.tmp" : "%s", os->full_path);
2246 set_http_options(&opts, c);
2247 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2248 av_dict_free(&opts);
2249 if (ret < 0) {
2250 return handle_io_open_error(s, ret, os->temp_path);
2251 }
2252 if (c->lhls) {
2253 char *prefetch_url = use_rename ? NULL : os->filename;
2254 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2255 }
2256 }
2257
2258 //write out the data immediately in streaming mode
2259 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2260 int len = 0;
2261 uint8_t *buf = NULL;
2262 avio_flush(os->ctx->pb);
2263 len = avio_get_dyn_buf (os->ctx->pb, &buf);
2264 if (os->out) {
2265 avio_write(os->out, buf + os->written_len, len - os->written_len);
2266 avio_flush(os->out);
2267 }
2268 os->written_len = len;
2269 }
2270
2271 return ret;
2272 }
2273
dash_write_trailer(AVFormatContext * s)2274 static int dash_write_trailer(AVFormatContext *s)
2275 {
2276 DASHContext *c = s->priv_data;
2277 int i;
2278
2279 if (s->nb_streams > 0) {
2280 OutputStream *os = &c->streams[0];
2281 // If no segments have been written so far, try to do a crude
2282 // guess of the segment duration
2283 if (!c->last_duration)
2284 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2285 s->streams[0]->time_base,
2286 AV_TIME_BASE_Q);
2287 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2288 s->streams[0]->time_base,
2289 AV_TIME_BASE_Q);
2290 }
2291 dash_flush(s, 1, -1);
2292
2293 if (c->remove_at_exit) {
2294 for (i = 0; i < s->nb_streams; ++i) {
2295 OutputStream *os = &c->streams[i];
2296 dashenc_delete_media_segments(s, os, os->nb_segments);
2297 dashenc_delete_segment_file(s, os->initfile);
2298 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2299 char filename[1024];
2300 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2301 dashenc_delete_file(s, filename);
2302 }
2303 }
2304 dashenc_delete_file(s, s->url);
2305
2306 if (c->hls_playlist && c->master_playlist_created) {
2307 char filename[1024];
2308 snprintf(filename, sizeof(filename), "%s%s", c->dirname, c->hls_master_name);
2309 dashenc_delete_file(s, filename);
2310 }
2311 }
2312
2313 return 0;
2314 }
2315
dash_check_bitstream(struct AVFormatContext * s,const AVPacket * avpkt)2316 static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
2317 {
2318 DASHContext *c = s->priv_data;
2319 OutputStream *os = &c->streams[avpkt->stream_index];
2320 AVFormatContext *oc = os->ctx;
2321 if (oc->oformat->check_bitstream) {
2322 int ret;
2323 AVPacket pkt = *avpkt;
2324 pkt.stream_index = 0;
2325 ret = oc->oformat->check_bitstream(oc, &pkt);
2326 if (ret == 1) {
2327 AVStream *st = s->streams[avpkt->stream_index];
2328 AVStream *ost = oc->streams[0];
2329 st->internal->bsfc = ost->internal->bsfc;
2330 ost->internal->bsfc = NULL;
2331 }
2332 return ret;
2333 }
2334 return 1;
2335 }
2336
2337 #define OFFSET(x) offsetof(DASHContext, x)
2338 #define E AV_OPT_FLAG_ENCODING_PARAM
2339 static const AVOption options[] = {
2340 { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
2341 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2342 { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
2343 #if FF_API_DASH_MIN_SEG_DURATION
2344 { "min_seg_duration", "minimum segment duration (in microseconds) (will be deprecated)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT, { .i64 = 5000000 }, 0, INT_MAX, E },
2345 #endif
2346 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
2347 { "frag_duration", "fragment duration (in seconds, fractional value can be set)", OFFSET(frag_duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2348 { "frag_type", "set type of interval for fragments", OFFSET(frag_type), AV_OPT_TYPE_INT, {.i64 = FRAG_TYPE_NONE }, 0, FRAG_TYPE_NB - 1, E, "frag_type"},
2349 { "none", "one fragment per segment", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_NONE }, 0, UINT_MAX, E, "frag_type"},
2350 { "every_frame", "fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_EVERY_FRAME }, 0, UINT_MAX, E, "frag_type"},
2351 { "duration", "fragment at specific time intervals", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_DURATION }, 0, UINT_MAX, E, "frag_type"},
2352 { "pframes", "fragment at keyframes and following P-Frame reordering (Video only, experimental)", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_PFRAMES }, 0, UINT_MAX, E, "frag_type"},
2353 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2354 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2355 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2356 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2357 { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
2358 { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.$ext$"}, 0, 0, E },
2359 { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.$ext$"}, 0, 0, E },
2360 { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E },
2361 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
2362 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
2363 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
2364 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2365 { "hls_master_name", "HLS master playlist name", OFFSET(hls_master_name), AV_OPT_TYPE_STRING, {.str = "master.m3u8"}, 0, 0, E },
2366 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2367 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
2368 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2369 { "format_options","set list of options for the container format (mp4/webm) used for dash", OFFSET(format_options), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, E},
2370 { "global_sidx", "Write global SIDX atom. Applicable only for single file, mp4 output, non-streaming mode", OFFSET(global_sidx), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2371 { "dash_segment_type", "set dash segment files type", OFFSET(segment_type_option), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_AUTO }, 0, SEGMENT_TYPE_NB - 1, E, "segment_type"},
2372 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
2373 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
2374 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
2375 { "ignore_io_errors", "Ignore IO errors during open and write. Useful for long-duration runs with network output", OFFSET(ignore_io_errors), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2376 { "lhls", "Enable Low-latency HLS(Experimental). Adds #EXT-X-PREFETCH tag with current segment's URI", OFFSET(lhls), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2377 { "ldash", "Enable Low-latency dash. Constrains the value of a few elements", OFFSET(ldash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2378 { "master_m3u8_publish_rate", "Publish master playlist every after this many segment intervals", OFFSET(master_publish_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, UINT_MAX, E},
2379 { "write_prft", "Write producer reference time element", OFFSET(write_prft), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, E},
2380 { "mpd_profile", "Set profiles. Elements and values used in the manifest may be constrained by them", OFFSET(profile), AV_OPT_TYPE_FLAGS, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2381 { "dash", "MPEG-DASH ISO Base media file format live profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, "mpd_profile"},
2382 { "dvb_dash", "DVB-DASH profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DVB }, 0, UINT_MAX, E, "mpd_profile"},
2383 { "http_opts", "HTTP protocol options", OFFSET(http_opts), AV_OPT_TYPE_DICT, { .str = NULL }, 0, 0, E },
2384 { "target_latency", "Set desired target latency for Low-latency dash", OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2385 { "min_playback_rate", "Set desired minimum playback rate", OFFSET(min_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2386 { "max_playback_rate", "Set desired maximum playback rate", OFFSET(max_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2387 { "update_period", "Set the mpd update interval", OFFSET(update_period), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
2388 { NULL },
2389 };
2390
2391 static const AVClass dash_class = {
2392 .class_name = "dash muxer",
2393 .item_name = av_default_item_name,
2394 .option = options,
2395 .version = LIBAVUTIL_VERSION_INT,
2396 };
2397
2398 AVOutputFormat ff_dash_muxer = {
2399 .name = "dash",
2400 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2401 .extensions = "mpd",
2402 .priv_data_size = sizeof(DASHContext),
2403 .audio_codec = AV_CODEC_ID_AAC,
2404 .video_codec = AV_CODEC_ID_H264,
2405 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2406 .init = dash_init,
2407 .write_header = dash_write_header,
2408 .write_packet = dash_write_packet,
2409 .write_trailer = dash_write_trailer,
2410 .deinit = dash_free,
2411 .check_bitstream = dash_check_bitstream,
2412 .priv_class = &dash_class,
2413 };
2414