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