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 #include "config_components.h"
25 #if HAVE_UNISTD_H
26 #include <unistd.h>
27 #endif
28
29 #include "libavutil/avassert.h"
30 #include "libavutil/avutil.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/bprint.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/mathematics.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/parseutils.h"
37 #include "libavutil/rational.h"
38 #include "libavutil/time.h"
39 #include "libavutil/time_internal.h"
40
41 #include "av1.h"
42 #include "avc.h"
43 #include "avformat.h"
44 #include "avio_internal.h"
45 #include "hlsplaylist.h"
46 #if CONFIG_HTTP_PROTOCOL
47 #include "http.h"
48 #endif
49 #include "internal.h"
50 #include "isom.h"
51 #include "mux.h"
52 #include "os_support.h"
53 #include "url.h"
54 #include "vpcc.h"
55 #include "dash.h"
56
57 typedef enum {
58 SEGMENT_TYPE_AUTO = 0,
59 SEGMENT_TYPE_MP4,
60 SEGMENT_TYPE_WEBM,
61 SEGMENT_TYPE_NB
62 } SegmentType;
63
64 enum {
65 FRAG_TYPE_NONE = 0,
66 FRAG_TYPE_EVERY_FRAME,
67 FRAG_TYPE_DURATION,
68 FRAG_TYPE_PFRAMES,
69 FRAG_TYPE_NB
70 };
71
72 #define MPD_PROFILE_DASH 1
73 #define MPD_PROFILE_DVB 2
74
75 typedef struct Segment {
76 char file[1024];
77 int64_t start_pos;
78 int range_length, index_length;
79 int64_t time;
80 double prog_date_time;
81 int64_t duration;
82 int n;
83 } Segment;
84
85 typedef struct AdaptationSet {
86 int id;
87 char *descriptor;
88 int64_t seg_duration;
89 int64_t frag_duration;
90 int frag_type;
91 enum AVMediaType media_type;
92 AVDictionary *metadata;
93 AVRational min_frame_rate, max_frame_rate;
94 int ambiguous_frame_rate;
95 int64_t max_frag_duration;
96 int max_width, max_height;
97 int nb_streams;
98 AVRational par;
99 int trick_idx;
100 } AdaptationSet;
101
102 typedef struct OutputStream {
103 AVFormatContext *ctx;
104 int ctx_inited, as_idx;
105 AVIOContext *out;
106 AVCodecParserContext *parser;
107 AVCodecContext *parser_avctx;
108 int packets_written;
109 char initfile[1024];
110 int64_t init_start_pos, pos;
111 int init_range_length;
112 int nb_segments, segments_size, segment_index;
113 int64_t seg_duration;
114 int64_t frag_duration;
115 int64_t last_duration;
116 Segment **segments;
117 int64_t first_pts, start_pts, max_pts;
118 int64_t last_dts, last_pts;
119 int last_flags;
120 int bit_rate;
121 int first_segment_bit_rate;
122 SegmentType segment_type; /* segment type selected for this particular stream */
123 const char *format_name;
124 const char *extension_name;
125 const char *single_file_name; /* file names selected for this particular stream */
126 const char *init_seg_name;
127 const char *media_seg_name;
128
129 char codec_str[100];
130 int written_len;
131 char filename[1024];
132 char full_path[1024];
133 char temp_path[1024];
134 double availability_time_offset;
135 AVProducerReferenceTime producer_reference_time;
136 char producer_reference_time_str[100];
137 int total_pkt_size;
138 int64_t total_pkt_duration;
139 int muxer_overhead;
140 int frag_type;
141 int64_t gop_size;
142 AVRational sar;
143 int coding_dependency;
144 } OutputStream;
145
146 typedef struct DASHContext {
147 const AVClass *class; /* Class for private options. */
148 char *adaptation_sets;
149 AdaptationSet *as;
150 int nb_as;
151 int window_size;
152 int extra_window_size;
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
set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par, AVRational *frame_rate, char *str, int size)336 static void set_vp9_codec_str(AVFormatContext *s, AVCodecParameters *par,
337 AVRational *frame_rate, char *str, int size) {
338 VPCC vpcc;
339 int ret = ff_isom_get_vpcc_features(s, par, frame_rate, &vpcc);
340 if (ret == 0) {
341 av_strlcatf(str, size, "vp09.%02d.%02d.%02d",
342 vpcc.profile, vpcc.level, vpcc.bitdepth);
343 } else {
344 // Default to just vp9 in case of error while finding out profile or level
345 av_log(s, AV_LOG_WARNING, "Could not find VP9 profile and/or level\n");
346 av_strlcpy(str, "vp9", size);
347 }
348 return;
349 }
350
set_codec_str(AVFormatContext *s, AVCodecParameters *par, AVRational *frame_rate, char *str, int size)351 static void set_codec_str(AVFormatContext *s, AVCodecParameters *par,
352 AVRational *frame_rate, char *str, int size)
353 {
354 const AVCodecTag *tags[2] = { NULL, NULL };
355 uint32_t tag;
356 int i;
357
358 // common Webm codecs are not part of RFC 6381
359 for (i = 0; codecs[i].id; i++)
360 if (codecs[i].id == par->codec_id) {
361 if (codecs[i].id == AV_CODEC_ID_VP9) {
362 set_vp9_codec_str(s, par, frame_rate, str, size);
363 } else {
364 av_strlcpy(str, codecs[i].str, size);
365 }
366 return;
367 }
368
369 // for codecs part of RFC 6381
370 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
371 tags[0] = ff_codec_movvideo_tags;
372 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
373 tags[0] = ff_codec_movaudio_tags;
374 else
375 return;
376
377 tag = par->codec_tag;
378 if (!tag)
379 tag = av_codec_get_tag(tags, par->codec_id);
380 if (!tag)
381 return;
382 if (size < 5)
383 return;
384
385 AV_WL32(str, tag);
386 str[4] = '\0';
387 if (!strcmp(str, "mp4a") || !strcmp(str, "mp4v")) {
388 uint32_t oti;
389 tags[0] = ff_mp4_obj_type;
390 oti = av_codec_get_tag(tags, par->codec_id);
391 if (oti)
392 av_strlcatf(str, size, ".%02"PRIx32, oti);
393 else
394 return;
395
396 if (tag == MKTAG('m', 'p', '4', 'a')) {
397 if (par->extradata_size >= 2) {
398 int aot = par->extradata[0] >> 3;
399 if (aot == 31)
400 aot = ((AV_RB16(par->extradata) >> 5) & 0x3f) + 32;
401 av_strlcatf(str, size, ".%d", aot);
402 }
403 } else if (tag == MKTAG('m', 'p', '4', 'v')) {
404 // Unimplemented, should output ProfileLevelIndication as a decimal number
405 av_log(s, AV_LOG_WARNING, "Incomplete RFC 6381 codec string for mp4v\n");
406 }
407 } else if (!strcmp(str, "avc1")) {
408 uint8_t *tmpbuf = NULL;
409 uint8_t *extradata = par->extradata;
410 int extradata_size = par->extradata_size;
411 if (!extradata_size)
412 return;
413 if (extradata[0] != 1) {
414 AVIOContext *pb;
415 if (avio_open_dyn_buf(&pb) < 0)
416 return;
417 if (ff_isom_write_avcc(pb, extradata, extradata_size) < 0) {
418 ffio_free_dyn_buf(&pb);
419 return;
420 }
421 extradata_size = avio_close_dyn_buf(pb, &extradata);
422 tmpbuf = extradata;
423 }
424
425 if (extradata_size >= 4)
426 av_strlcatf(str, size, ".%02x%02x%02x",
427 extradata[1], extradata[2], extradata[3]);
428 av_free(tmpbuf);
429 } else if (!strcmp(str, "av01")) {
430 AV1SequenceParameters seq;
431 if (!par->extradata_size)
432 return;
433 if (ff_av1_parse_seq_header(&seq, par->extradata, par->extradata_size) < 0)
434 return;
435
436 av_strlcatf(str, size, ".%01u.%02u%s.%02u",
437 seq.profile, seq.level, seq.tier ? "H" : "M", seq.bitdepth);
438 if (seq.color_description_present_flag)
439 av_strlcatf(str, size, ".%01u.%01u%01u%01u.%02u.%02u.%02u.%01u",
440 seq.monochrome,
441 seq.chroma_subsampling_x, seq.chroma_subsampling_y, seq.chroma_sample_position,
442 seq.color_primaries, seq.transfer_characteristics, seq.matrix_coefficients,
443 seq.color_range);
444 }
445 }
446
flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)447 static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
448 {
449 uint8_t *buffer;
450
451 if (!os->ctx->pb) {
452 return AVERROR(EINVAL);
453 }
454
455 // flush
456 av_write_frame(os->ctx, NULL);
457 avio_flush(os->ctx->pb);
458
459 if (!c->single_file) {
460 // write out to file
461 *range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
462 os->ctx->pb = NULL;
463 if (os->out)
464 avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
465 os->written_len = 0;
466 av_free(buffer);
467
468 // re-open buffer
469 return avio_open_dyn_buf(&os->ctx->pb);
470 } else {
471 *range_length = avio_tell(os->ctx->pb) - os->pos;
472 return 0;
473 }
474 }
475
set_http_options(AVDictionary **options, DASHContext *c)476 static void set_http_options(AVDictionary **options, DASHContext *c)
477 {
478 if (c->method)
479 av_dict_set(options, "method", c->method, 0);
480 av_dict_copy(options, c->http_opts, 0);
481 if (c->user_agent)
482 av_dict_set(options, "user_agent", c->user_agent, 0);
483 if (c->http_persistent)
484 av_dict_set_int(options, "multiple_requests", 1, 0);
485 if (c->timeout >= 0)
486 av_dict_set_int(options, "timeout", c->timeout, 0);
487 }
488
get_hls_playlist_name(char *playlist_name, int string_size, const char *base_url, int id)489 static void get_hls_playlist_name(char *playlist_name, int string_size,
490 const char *base_url, int id) {
491 if (base_url)
492 snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
493 else
494 snprintf(playlist_name, string_size, "media_%d.m3u8", id);
495 }
496
get_start_index_number(OutputStream *os, DASHContext *c, int *start_index, int *start_number)497 static void get_start_index_number(OutputStream *os, DASHContext *c,
498 int *start_index, int *start_number) {
499 *start_index = 0;
500 *start_number = 1;
501 if (c->window_size) {
502 *start_index = FFMAX(os->nb_segments - c->window_size, 0);
503 *start_number = FFMAX(os->segment_index - c->window_size, 1);
504 }
505 }
506
write_hls_media_playlist(OutputStream *os, AVFormatContext *s, int representation_id, int final, char *prefetch_url)507 static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
508 int representation_id, int final,
509 char *prefetch_url) {
510 DASHContext *c = s->priv_data;
511 int timescale = os->ctx->streams[0]->time_base.den;
512 char temp_filename_hls[1024];
513 char filename_hls[1024];
514 AVDictionary *http_opts = NULL;
515 int target_duration = 0;
516 int ret = 0;
517 const char *proto = avio_find_protocol_name(c->dirname);
518 int use_rename = proto && !strcmp(proto, "file");
519 int i, start_index, start_number;
520 double prog_date_time = 0;
521
522 get_start_index_number(os, c, &start_index, &start_number);
523
524 if (!c->hls_playlist || start_index >= os->nb_segments ||
525 os->segment_type != SEGMENT_TYPE_MP4)
526 return;
527
528 get_hls_playlist_name(filename_hls, sizeof(filename_hls),
529 c->dirname, representation_id);
530
531 snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
532
533 set_http_options(&http_opts, c);
534 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
535 av_dict_free(&http_opts);
536 if (ret < 0) {
537 handle_io_open_error(s, ret, temp_filename_hls);
538 return;
539 }
540 for (i = start_index; i < os->nb_segments; i++) {
541 Segment *seg = os->segments[i];
542 double duration = (double) seg->duration / timescale;
543 if (target_duration <= duration)
544 target_duration = lrint(duration);
545 }
546
547 ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
548 start_number, PLAYLIST_TYPE_NONE, 0);
549
550 ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
551 os->init_range_length, os->init_start_pos);
552
553 for (i = start_index; i < os->nb_segments; i++) {
554 Segment *seg = os->segments[i];
555
556 if (fabs(prog_date_time) < 1e-7) {
557 if (os->nb_segments == 1)
558 prog_date_time = c->start_time_s;
559 else
560 prog_date_time = seg->prog_date_time;
561 }
562 seg->prog_date_time = prog_date_time;
563
564 ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
565 (double) seg->duration / timescale, 0,
566 seg->range_length, seg->start_pos, NULL,
567 c->single_file ? os->initfile : seg->file,
568 &prog_date_time, 0, 0, 0);
569 if (ret < 0) {
570 av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
571 }
572 }
573
574 if (prefetch_url)
575 avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
576
577 if (final)
578 ff_hls_write_end_list(c->m3u8_out);
579
580 dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
581
582 if (use_rename)
583 ff_rename(temp_filename_hls, filename_hls, os->ctx);
584 }
585
flush_init_segment(AVFormatContext *s, OutputStream *os)586 static int flush_init_segment(AVFormatContext *s, OutputStream *os)
587 {
588 DASHContext *c = s->priv_data;
589 int ret, range_length;
590
591 ret = flush_dynbuf(c, os, &range_length);
592 if (ret < 0)
593 return ret;
594
595 os->pos = os->init_range_length = range_length;
596 if (!c->single_file) {
597 char filename[1024];
598 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
599 dashenc_io_close(s, &os->out, filename);
600 }
601 return 0;
602 }
603
dash_free(AVFormatContext *s)604 static void dash_free(AVFormatContext *s)
605 {
606 DASHContext *c = s->priv_data;
607 int i, j;
608
609 if (c->as) {
610 for (i = 0; i < c->nb_as; i++) {
611 av_dict_free(&c->as[i].metadata);
612 av_freep(&c->as[i].descriptor);
613 }
614 av_freep(&c->as);
615 c->nb_as = 0;
616 }
617
618 if (!c->streams)
619 return;
620 for (i = 0; i < s->nb_streams; i++) {
621 OutputStream *os = &c->streams[i];
622 if (os->ctx && os->ctx->pb) {
623 if (!c->single_file)
624 ffio_free_dyn_buf(&os->ctx->pb);
625 else
626 avio_close(os->ctx->pb);
627 }
628 ff_format_io_close(s, &os->out);
629 avformat_free_context(os->ctx);
630 avcodec_free_context(&os->parser_avctx);
631 av_parser_close(os->parser);
632 for (j = 0; j < os->nb_segments; j++)
633 av_free(os->segments[j]);
634 av_free(os->segments);
635 av_freep(&os->single_file_name);
636 av_freep(&os->init_seg_name);
637 av_freep(&os->media_seg_name);
638 }
639 av_freep(&c->streams);
640
641 ff_format_io_close(s, &c->mpd_out);
642 ff_format_io_close(s, &c->m3u8_out);
643 }
644
output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s, int representation_id, int final)645 static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
646 int representation_id, int final)
647 {
648 DASHContext *c = s->priv_data;
649 int i, start_index, start_number;
650 get_start_index_number(os, c, &start_index, &start_number);
651
652 if (c->use_template) {
653 int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
654 avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
655 if (!c->use_timeline) {
656 avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
657 if (c->streaming && os->availability_time_offset)
658 avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
659 os->availability_time_offset);
660 }
661 if (c->streaming && os->availability_time_offset && !final)
662 avio_printf(out, "availabilityTimeComplete=\"false\" ");
663
664 avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
665 if (c->presentation_time_offset)
666 avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
667 avio_printf(out, ">\n");
668 if (c->use_timeline) {
669 int64_t cur_time = 0;
670 avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
671 for (i = start_index; i < os->nb_segments; ) {
672 Segment *seg = os->segments[i];
673 int repeat = 0;
674 avio_printf(out, "\t\t\t\t\t\t<S ");
675 if (i == start_index || seg->time != cur_time) {
676 cur_time = seg->time;
677 avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
678 }
679 avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
680 while (i + repeat + 1 < os->nb_segments &&
681 os->segments[i + repeat + 1]->duration == seg->duration &&
682 os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
683 repeat++;
684 if (repeat > 0)
685 avio_printf(out, "r=\"%d\" ", repeat);
686 avio_printf(out, "/>\n");
687 i += 1 + repeat;
688 cur_time += (1 + repeat) * seg->duration;
689 }
690 avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
691 }
692 avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
693 } else if (c->single_file) {
694 avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
695 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);
696 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);
697 for (i = start_index; i < os->nb_segments; i++) {
698 Segment *seg = os->segments[i];
699 avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
700 if (seg->index_length)
701 avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
702 avio_printf(out, "/>\n");
703 }
704 avio_printf(out, "\t\t\t\t</SegmentList>\n");
705 } else {
706 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);
707 avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
708 for (i = start_index; i < os->nb_segments; i++) {
709 Segment *seg = os->segments[i];
710 avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
711 }
712 avio_printf(out, "\t\t\t\t</SegmentList>\n");
713 }
714 if (!c->lhls || final) {
715 write_hls_media_playlist(os, s, representation_id, final, NULL);
716 }
717
718 }
719
xmlescape(const char *str)720 static char *xmlescape(const char *str) {
721 int outlen = strlen(str)*3/2 + 6;
722 char *out = av_realloc(NULL, outlen + 1);
723 int pos = 0;
724 if (!out)
725 return NULL;
726 for (; *str; str++) {
727 if (pos + 6 > outlen) {
728 char *tmp;
729 outlen = 2 * outlen + 6;
730 tmp = av_realloc(out, outlen + 1);
731 if (!tmp) {
732 av_free(out);
733 return NULL;
734 }
735 out = tmp;
736 }
737 if (*str == '&') {
738 memcpy(&out[pos], "&", 5);
739 pos += 5;
740 } else if (*str == '<') {
741 memcpy(&out[pos], "<", 4);
742 pos += 4;
743 } else if (*str == '>') {
744 memcpy(&out[pos], ">", 4);
745 pos += 4;
746 } else if (*str == '\'') {
747 memcpy(&out[pos], "'", 6);
748 pos += 6;
749 } else if (*str == '\"') {
750 memcpy(&out[pos], """, 6);
751 pos += 6;
752 } else {
753 out[pos++] = *str;
754 }
755 }
756 out[pos] = '\0';
757 return out;
758 }
759
write_time(AVIOContext *out, int64_t time)760 static void write_time(AVIOContext *out, int64_t time)
761 {
762 int seconds = time / AV_TIME_BASE;
763 int fractions = time % AV_TIME_BASE;
764 int minutes = seconds / 60;
765 int hours = minutes / 60;
766 seconds %= 60;
767 minutes %= 60;
768 avio_printf(out, "PT");
769 if (hours)
770 avio_printf(out, "%dH", hours);
771 if (hours || minutes)
772 avio_printf(out, "%dM", minutes);
773 avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
774 }
775
format_date(char *buf, int size, int64_t time_us)776 static void format_date(char *buf, int size, int64_t time_us)
777 {
778 struct tm *ptm, tmbuf;
779 int64_t time_ms = time_us / 1000;
780 const time_t time_s = time_ms / 1000;
781 int millisec = time_ms - (time_s * 1000);
782 ptm = gmtime_r(&time_s, &tmbuf);
783 if (ptm) {
784 int len;
785 if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
786 buf[0] = '\0';
787 return;
788 }
789 len = strlen(buf);
790 snprintf(buf + len, size - len, ".%03dZ", millisec);
791 }
792 }
793
write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index, int final)794 static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
795 int final)
796 {
797 DASHContext *c = s->priv_data;
798 AdaptationSet *as = &c->as[as_index];
799 AVDictionaryEntry *lang, *role;
800 int i;
801
802 avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"%s\" startWithSAP=\"1\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
803 as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
804 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)
805 avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
806 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))
807 avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
808 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
809 avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
810 avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
811 }
812 lang = av_dict_get(as->metadata, "language", NULL, 0);
813 if (lang)
814 avio_printf(out, " lang=\"%s\"", lang->value);
815 avio_printf(out, ">\n");
816
817 if (!final && c->ldash && as->max_frag_duration && !(c->profile & MPD_PROFILE_DVB))
818 avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
819 if (as->trick_idx >= 0)
820 avio_printf(out, "\t\t\t<EssentialProperty id=\"%d\" schemeIdUri=\"http://dashif.org/guidelines/trickmode\" value=\"%d\"/>\n", as->id, as->trick_idx);
821 role = av_dict_get(as->metadata, "role", NULL, 0);
822 if (role)
823 avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
824 if (as->descriptor)
825 avio_printf(out, "\t\t\t%s\n", as->descriptor);
826 for (i = 0; i < s->nb_streams; i++) {
827 AVStream *st = s->streams[i];
828 OutputStream *os = &c->streams[i];
829 char bandwidth_str[64] = {'\0'};
830
831 if (os->as_idx - 1 != as_index)
832 continue;
833
834 if (os->bit_rate > 0)
835 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->bit_rate);
836 else if (final) {
837 int average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
838 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", average_bit_rate);
839 } else if (os->first_segment_bit_rate > 0)
840 snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->first_segment_bit_rate);
841
842 if (as->media_type == AVMEDIA_TYPE_VIDEO) {
843 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
844 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
845 if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
846 avio_printf(out, " scanType=\"unknown\"");
847 else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
848 avio_printf(out, " scanType=\"interlaced\"");
849 avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
850 if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
851 avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
852 if (as->trick_idx >= 0) {
853 AdaptationSet *tas = &c->as[as->trick_idx];
854 if (!as->ambiguous_frame_rate && !tas->ambiguous_frame_rate)
855 avio_printf(out, " maxPlayoutRate=\"%d\"", FFMAX((int)av_q2d(av_div_q(tas->min_frame_rate, as->min_frame_rate)), 1));
856 }
857 if (!os->coding_dependency)
858 avio_printf(out, " codingDependency=\"false\"");
859 avio_printf(out, ">\n");
860 } else {
861 avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
862 i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
863 avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
864 s->streams[i]->codecpar->ch_layout.nb_channels);
865 }
866 if (!final && c->write_prft && os->producer_reference_time_str[0]) {
867 avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"%s\" wallClockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
868 i, os->producer_reference_time.flags ? "captured" : "encoder", os->producer_reference_time_str, c->presentation_time_offset);
869 avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
870 avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
871 }
872 if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE && !(c->profile & MPD_PROFILE_DVB) &&
873 (os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
874 avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
875 output_segment_list(os, out, s, i, final);
876 avio_printf(out, "\t\t\t</Representation>\n");
877 }
878 avio_printf(out, "\t\t</AdaptationSet>\n");
879
880 return 0;
881 }
882
add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)883 static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
884 {
885 DASHContext *c = s->priv_data;
886 void *mem;
887
888 if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
889 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
890 return AVERROR(EINVAL);
891 }
892 mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
893 if (!mem)
894 return AVERROR(ENOMEM);
895 c->as = mem;
896 ++c->nb_as;
897
898 *as = &c->as[c->nb_as - 1];
899 memset(*as, 0, sizeof(**as));
900 (*as)->media_type = type;
901 (*as)->frag_type = -1;
902 (*as)->trick_idx = -1;
903
904 return 0;
905 }
906
adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)907 static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
908 {
909 DASHContext *c = s->priv_data;
910 AdaptationSet *as = &c->as[as_idx - 1];
911 OutputStream *os = &c->streams[i];
912
913 if (as->media_type != s->streams[i]->codecpar->codec_type) {
914 av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
915 return AVERROR(EINVAL);
916 } else if (os->as_idx) {
917 av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
918 return AVERROR(EINVAL);
919 }
920 if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
921 av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
922 return AVERROR(EINVAL);
923 }
924 os->as_idx = as_idx;
925 ++as->nb_streams;
926
927 return 0;
928 }
929
parse_adaptation_sets(AVFormatContext *s)930 static int parse_adaptation_sets(AVFormatContext *s)
931 {
932 DASHContext *c = s->priv_data;
933 const char *p = c->adaptation_sets;
934 enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
935 AdaptationSet *as;
936 int i, n, ret;
937
938 // default: one AdaptationSet for each stream
939 if (!p) {
940 for (i = 0; i < s->nb_streams; i++) {
941 if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
942 return ret;
943 as->id = i;
944
945 c->streams[i].as_idx = c->nb_as;
946 ++as->nb_streams;
947 }
948 goto end;
949 }
950
951 // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
952 // option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
953 // option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2
954 // id=1,trick_id=0,seg_duration=10,frag_type=none,streams=3 and so on
955 // descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
956 // descriptor_str should be a self-closing xml tag.
957 // seg_duration and frag_duration have the same syntax as the global options of
958 // the same name, and the former have precedence over them if set.
959 state = new_set;
960 while (*p) {
961 if (*p == ' ') {
962 p++;
963 continue;
964 } else if (state == new_set && av_strstart(p, "id=", &p)) {
965 char id_str[10], *end_str;
966
967 n = strcspn(p, ",");
968 snprintf(id_str, sizeof(id_str), "%.*s", n, p);
969
970 i = strtol(id_str, &end_str, 10);
971 if (id_str == end_str || i < 0 || i > c->nb_as) {
972 av_log(s, AV_LOG_ERROR, "\"%s\" is not a valid value for an AdaptationSet id\n", id_str);
973 return AVERROR(EINVAL);
974 }
975
976 if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
977 return ret;
978 as->id = i;
979
980 p += n;
981 if (*p)
982 p++;
983 state = parse_default;
984 } else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
985 state = parse_seg_duration;
986 } else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
987 state = parse_frag_duration;
988 } else if (state == parse_seg_duration || state == parse_frag_duration) {
989 char str[32];
990 int64_t usecs = 0;
991
992 n = strcspn(p, ",");
993 snprintf(str, sizeof(str), "%.*s", n, p);
994 p += n;
995 if (*p)
996 p++;
997
998 ret = av_parse_time(&usecs, str, 1);
999 if (ret < 0) {
1000 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
1001 return ret;
1002 }
1003
1004 if (state == parse_seg_duration)
1005 as->seg_duration = usecs;
1006 else
1007 as->frag_duration = usecs;
1008 state = parse_default;
1009 } else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
1010 char type_str[16];
1011
1012 n = strcspn(p, ",");
1013 snprintf(type_str, sizeof(type_str), "%.*s", n, p);
1014 p += n;
1015 if (*p)
1016 p++;
1017
1018 if (!strcmp(type_str, "duration"))
1019 as->frag_type = FRAG_TYPE_DURATION;
1020 else if (!strcmp(type_str, "pframes"))
1021 as->frag_type = FRAG_TYPE_PFRAMES;
1022 else if (!strcmp(type_str, "every_frame"))
1023 as->frag_type = FRAG_TYPE_EVERY_FRAME;
1024 else if (!strcmp(type_str, "none"))
1025 as->frag_type = FRAG_TYPE_NONE;
1026 else {
1027 av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
1028 return ret;
1029 }
1030 state = parse_default;
1031 } else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
1032 n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
1033 if (n < strlen(p)) {
1034 as->descriptor = av_strndup(p, n);
1035 } else {
1036 av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
1037 return AVERROR(EINVAL);
1038 }
1039 p += n;
1040 if (*p)
1041 p++;
1042 state = parse_default;
1043 } else if ((state != new_set) && av_strstart(p, "trick_id=", &p)) {
1044 char trick_id_str[10], *end_str;
1045
1046 n = strcspn(p, ",");
1047 snprintf(trick_id_str, sizeof(trick_id_str), "%.*s", n, p);
1048 p += n;
1049
1050 as->trick_idx = strtol(trick_id_str, &end_str, 10);
1051 if (trick_id_str == end_str || as->trick_idx < 0)
1052 return AVERROR(EINVAL);
1053
1054 if (*p)
1055 p++;
1056 state = parse_default;
1057 } else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
1058 state = parsing_streams;
1059 } else if (state == parsing_streams) {
1060 AdaptationSet *as = &c->as[c->nb_as - 1];
1061 char idx_str[8], *end_str;
1062
1063 n = strcspn(p, " ,");
1064 snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
1065 p += n;
1066
1067 // if value is "a" or "v", map all streams of that type
1068 if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
1069 enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
1070 av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
1071
1072 for (i = 0; i < s->nb_streams; i++) {
1073 if (s->streams[i]->codecpar->codec_type != type)
1074 continue;
1075
1076 as->media_type = s->streams[i]->codecpar->codec_type;
1077
1078 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1079 return ret;
1080 }
1081 } else { // select single stream
1082 i = strtol(idx_str, &end_str, 10);
1083 if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
1084 av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
1085 return AVERROR(EINVAL);
1086 }
1087 av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
1088
1089 if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
1090 as->media_type = s->streams[i]->codecpar->codec_type;
1091 }
1092
1093 if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
1094 return ret;
1095 }
1096
1097 if (*p == ' ')
1098 state = new_set;
1099 if (*p)
1100 p++;
1101 } else {
1102 return AVERROR(EINVAL);
1103 }
1104 }
1105
1106 end:
1107 // check for unassigned streams
1108 for (i = 0; i < s->nb_streams; i++) {
1109 OutputStream *os = &c->streams[i];
1110 if (!os->as_idx) {
1111 av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
1112 return AVERROR(EINVAL);
1113 }
1114 }
1115
1116 // check references for trick mode AdaptationSet
1117 for (i = 0; i < c->nb_as; i++) {
1118 as = &c->as[i];
1119 if (as->trick_idx < 0)
1120 continue;
1121 for (n = 0; n < c->nb_as; n++) {
1122 if (c->as[n].id == as->trick_idx)
1123 break;
1124 }
1125 if (n >= c->nb_as) {
1126 av_log(s, AV_LOG_ERROR, "reference AdaptationSet id \"%d\" not found for trick mode AdaptationSet id \"%d\"\n", as->trick_idx, as->id);
1127 return AVERROR(EINVAL);
1128 }
1129 }
1130
1131 return 0;
1132 }
1133
write_manifest(AVFormatContext *s, int final)1134 static int write_manifest(AVFormatContext *s, int final)
1135 {
1136 DASHContext *c = s->priv_data;
1137 AVIOContext *out;
1138 char temp_filename[1024];
1139 int ret, i;
1140 const char *proto = avio_find_protocol_name(s->url);
1141 int use_rename = proto && !strcmp(proto, "file");
1142 static unsigned int warned_non_file = 0;
1143 AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1144 AVDictionary *opts = NULL;
1145
1146 if (!use_rename && !warned_non_file++)
1147 av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1148
1149 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1150 set_http_options(&opts, c);
1151 ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1152 av_dict_free(&opts);
1153 if (ret < 0) {
1154 return handle_io_open_error(s, ret, temp_filename);
1155 }
1156 out = c->mpd_out;
1157 avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1158 avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1159 "\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1160 "\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1161 "\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1162 "\tprofiles=\"");
1163 if (c->profile & MPD_PROFILE_DASH)
1164 avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1165 if (c->profile & MPD_PROFILE_DVB)
1166 avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1167 avio_printf(out, "\ttype=\"%s\"\n",
1168 final ? "static" : "dynamic");
1169 if (final) {
1170 avio_printf(out, "\tmediaPresentationDuration=\"");
1171 write_time(out, c->total_duration);
1172 avio_printf(out, "\"\n");
1173 } else {
1174 int64_t update_period = c->last_duration / AV_TIME_BASE;
1175 char now_str[100];
1176 if (c->use_template && !c->use_timeline)
1177 update_period = 500;
1178 if (c->update_period)
1179 update_period = c->update_period;
1180 avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1181 if (!c->ldash)
1182 avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1183 if (c->availability_start_time[0])
1184 avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1185 format_date(now_str, sizeof(now_str), av_gettime());
1186 if (now_str[0])
1187 avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1188 if (c->window_size && c->use_template) {
1189 avio_printf(out, "\ttimeShiftBufferDepth=\"");
1190 write_time(out, c->last_duration * c->window_size);
1191 avio_printf(out, "\"\n");
1192 }
1193 }
1194 avio_printf(out, "\tmaxSegmentDuration=\"");
1195 write_time(out, c->max_segment_duration);
1196 avio_printf(out, "\"\n");
1197 avio_printf(out, "\tminBufferTime=\"");
1198 write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1199 avio_printf(out, "\">\n");
1200 avio_printf(out, "\t<ProgramInformation>\n");
1201 if (title) {
1202 char *escaped = xmlescape(title->value);
1203 avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1204 av_free(escaped);
1205 }
1206 avio_printf(out, "\t</ProgramInformation>\n");
1207
1208 avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1209 if (!final && c->target_latency && c->target_latency_refid >= 0) {
1210 avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1211 if (s->nb_streams > 1)
1212 avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1213 avio_printf(out, "/>\n");
1214 }
1215 if (av_cmp_q(c->min_playback_rate, (AVRational) {1, 1}) ||
1216 av_cmp_q(c->max_playback_rate, (AVRational) {1, 1}))
1217 avio_printf(out, "\t\t<PlaybackRate min=\"%.2f\" max=\"%.2f\"/>\n",
1218 av_q2d(c->min_playback_rate), av_q2d(c->max_playback_rate));
1219 avio_printf(out, "\t</ServiceDescription>\n");
1220
1221 if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1222 OutputStream *os = &c->streams[0];
1223 int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1224 int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1225 avio_printf(out, "\t<Period id=\"0\" start=\"");
1226 write_time(out, start_time);
1227 avio_printf(out, "\">\n");
1228 } else {
1229 avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1230 }
1231
1232 for (i = 0; i < c->nb_as; i++) {
1233 if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1234 return ret;
1235 }
1236 avio_printf(out, "\t</Period>\n");
1237
1238 if (c->utc_timing_url)
1239 avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1240
1241 avio_printf(out, "</MPD>\n");
1242 avio_flush(out);
1243 dashenc_io_close(s, &c->mpd_out, temp_filename);
1244
1245 if (use_rename) {
1246 if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1247 return ret;
1248 }
1249
1250 if (c->hls_playlist) {
1251 char filename_hls[1024];
1252
1253 // Publish master playlist only the configured rate
1254 if (c->master_playlist_created && (!c->master_publish_rate ||
1255 c->streams[0].segment_index % c->master_publish_rate))
1256 return 0;
1257
1258 if (*c->dirname)
1259 snprintf(filename_hls, sizeof(filename_hls), "%s%s", c->dirname, c->hls_master_name);
1260 else
1261 snprintf(filename_hls, sizeof(filename_hls), "%s", c->hls_master_name);
1262
1263 snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1264
1265 set_http_options(&opts, c);
1266 ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1267 av_dict_free(&opts);
1268 if (ret < 0) {
1269 return handle_io_open_error(s, ret, temp_filename);
1270 }
1271
1272 ff_hls_write_playlist_version(c->m3u8_out, 7);
1273
1274 if (c->has_video) {
1275 // treat audio streams as alternative renditions for video streams
1276 const char *audio_group = "A1";
1277 char audio_codec_str[128] = "\0";
1278 int is_default = 1;
1279 int max_audio_bitrate = 0;
1280
1281 for (i = 0; i < s->nb_streams; i++) {
1282 char playlist_file[64];
1283 AVStream *st = s->streams[i];
1284 OutputStream *os = &c->streams[i];
1285 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1286 continue;
1287 if (os->segment_type != SEGMENT_TYPE_MP4)
1288 continue;
1289 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1290 ff_hls_write_audio_rendition(c->m3u8_out, (char *)audio_group,
1291 playlist_file, NULL, i, is_default);
1292 max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1293 os->muxer_overhead, max_audio_bitrate);
1294 if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1295 if (strlen(audio_codec_str))
1296 av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1297 av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1298 }
1299 is_default = 0;
1300 }
1301
1302 for (i = 0; i < s->nb_streams; i++) {
1303 char playlist_file[64];
1304 char codec_str[128];
1305 AVStream *st = s->streams[i];
1306 OutputStream *os = &c->streams[i];
1307 char *agroup = NULL;
1308 int stream_bitrate = os->muxer_overhead;
1309 if (os->bit_rate > 0)
1310 stream_bitrate += os->bit_rate;
1311 else if (final)
1312 stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1313 else if (os->first_segment_bit_rate > 0)
1314 stream_bitrate += os->first_segment_bit_rate;
1315 if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1316 continue;
1317 if (os->segment_type != SEGMENT_TYPE_MP4)
1318 continue;
1319 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1320 if (max_audio_bitrate) {
1321 agroup = (char *)audio_group;
1322 stream_bitrate += max_audio_bitrate;
1323 av_strlcat(codec_str, ",", sizeof(codec_str));
1324 av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1325 }
1326 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1327 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1328 playlist_file, agroup,
1329 codec_str, NULL, NULL);
1330 }
1331
1332 } else {
1333 // treat audio streams as separate renditions
1334
1335 for (i = 0; i < s->nb_streams; i++) {
1336 char playlist_file[64];
1337 char codec_str[128];
1338 AVStream *st = s->streams[i];
1339 OutputStream *os = &c->streams[i];
1340 int stream_bitrate = os->muxer_overhead;
1341 if (os->bit_rate > 0)
1342 stream_bitrate += os->bit_rate;
1343 else if (final)
1344 stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1345 else if (os->first_segment_bit_rate > 0)
1346 stream_bitrate += os->first_segment_bit_rate;
1347 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1348 continue;
1349 if (os->segment_type != SEGMENT_TYPE_MP4)
1350 continue;
1351 av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1352 get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1353 ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate,
1354 playlist_file, NULL,
1355 codec_str, NULL, NULL);
1356 }
1357 }
1358
1359 dashenc_io_close(s, &c->m3u8_out, temp_filename);
1360 if (use_rename)
1361 if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1362 return ret;
1363 c->master_playlist_created = 1;
1364 }
1365
1366 return 0;
1367 }
1368
dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)1369 static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1370 {
1371 AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1372 if (entry)
1373 av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1374 return 0;
1375 }
1376
dash_init(AVFormatContext *s)1377 static int dash_init(AVFormatContext *s)
1378 {
1379 DASHContext *c = s->priv_data;
1380 int ret = 0, i;
1381 char *ptr;
1382 char basename[1024];
1383
1384 c->nr_of_streams_to_flush = 0;
1385 if (c->single_file_name)
1386 c->single_file = 1;
1387 if (c->single_file)
1388 c->use_template = 0;
1389
1390 if (!c->profile) {
1391 av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1392 return AVERROR(EINVAL);
1393 }
1394 if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1395 av_log(s, AV_LOG_ERROR,
1396 "LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1397 return AVERROR_EXPERIMENTAL;
1398 }
1399
1400 if (c->lhls && !c->streaming) {
1401 av_log(s, AV_LOG_WARNING, "Enabling streaming as LHLS is enabled\n");
1402 c->streaming = 1;
1403 }
1404
1405 if (c->lhls && !c->hls_playlist) {
1406 av_log(s, AV_LOG_INFO, "Enabling hls_playlist as LHLS is enabled\n");
1407 c->hls_playlist = 1;
1408 }
1409
1410 if (c->ldash && !c->streaming) {
1411 av_log(s, AV_LOG_WARNING, "Enabling streaming as LDash is enabled\n");
1412 c->streaming = 1;
1413 }
1414
1415 if (c->target_latency && !c->streaming) {
1416 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1417 c->target_latency = 0;
1418 }
1419
1420 if (c->global_sidx && !c->single_file) {
1421 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1422 c->global_sidx = 0;
1423 }
1424
1425 if (c->global_sidx && c->streaming) {
1426 av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1427 c->global_sidx = 0;
1428 }
1429 if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1430 av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1431 c->frag_type = FRAG_TYPE_EVERY_FRAME;
1432 }
1433
1434 if (c->write_prft < 0) {
1435 c->write_prft = c->ldash;
1436 if (c->ldash)
1437 av_log(s, AV_LOG_VERBOSE, "Enabling Producer Reference Time element for Low Latency mode\n");
1438 }
1439
1440 if (c->write_prft && !c->utc_timing_url) {
1441 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1442 c->write_prft = 0;
1443 }
1444
1445 if (c->write_prft && !c->streaming) {
1446 av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1447 c->write_prft = 0;
1448 }
1449
1450 if (c->ldash && !c->write_prft) {
1451 av_log(s, AV_LOG_WARNING, "Low Latency mode enabled without Producer Reference Time element option! Resulting manifest may not be complaint\n");
1452 }
1453
1454 if (c->target_latency && !c->write_prft) {
1455 av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1456 c->target_latency = 0;
1457 }
1458
1459 if (av_cmp_q(c->max_playback_rate, c->min_playback_rate) < 0) {
1460 av_log(s, AV_LOG_WARNING, "Minimum playback rate value is higer than the Maximum. Both will be ignored\n");
1461 c->min_playback_rate = c->max_playback_rate = (AVRational) {1, 1};
1462 }
1463
1464 av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1465 ptr = strrchr(c->dirname, '/');
1466 if (ptr) {
1467 av_strlcpy(basename, &ptr[1], sizeof(basename));
1468 ptr[1] = '\0';
1469 } else {
1470 c->dirname[0] = '\0';
1471 av_strlcpy(basename, s->url, sizeof(basename));
1472 }
1473
1474 ptr = strrchr(basename, '.');
1475 if (ptr)
1476 *ptr = '\0';
1477
1478 c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1479 if (!c->streams)
1480 return AVERROR(ENOMEM);
1481
1482 if ((ret = parse_adaptation_sets(s)) < 0)
1483 return ret;
1484
1485 if ((ret = init_segment_types(s)) < 0)
1486 return ret;
1487
1488 for (i = 0; i < s->nb_streams; i++) {
1489 OutputStream *os = &c->streams[i];
1490 AdaptationSet *as = &c->as[os->as_idx - 1];
1491 AVFormatContext *ctx;
1492 AVStream *st;
1493 AVDictionary *opts = NULL;
1494 char filename[1024];
1495
1496 os->bit_rate = s->streams[i]->codecpar->bit_rate;
1497 if (!os->bit_rate) {
1498 int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1499 AV_LOG_ERROR : AV_LOG_WARNING;
1500 av_log(s, level, "No bit rate set for stream %d\n", i);
1501 if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1502 return AVERROR(EINVAL);
1503 }
1504
1505 // copy AdaptationSet language and role from stream metadata
1506 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1507 dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1508
1509 if (c->init_seg_name) {
1510 os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1511 if (!os->init_seg_name)
1512 return AVERROR(ENOMEM);
1513 }
1514 if (c->media_seg_name) {
1515 os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1516 if (!os->media_seg_name)
1517 return AVERROR(ENOMEM);
1518 }
1519 if (c->single_file_name) {
1520 os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1521 if (!os->single_file_name)
1522 return AVERROR(ENOMEM);
1523 }
1524
1525 if (os->segment_type == SEGMENT_TYPE_WEBM) {
1526 if ((!c->single_file && !av_match_ext(os->init_seg_name, os->format_name)) ||
1527 (!c->single_file && !av_match_ext(os->media_seg_name, os->format_name)) ||
1528 ( c->single_file && !av_match_ext(os->single_file_name, os->format_name))) {
1529 av_log(s, AV_LOG_WARNING,
1530 "One or many segment file names doesn't end with .webm. "
1531 "Override -init_seg_name and/or -media_seg_name and/or "
1532 "-single_file_name to end with the extension .webm\n");
1533 }
1534 if (c->streaming) {
1535 // Streaming not supported as matroskaenc buffers internally before writing the output
1536 av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1537 c->streaming = 0;
1538 }
1539 }
1540
1541 os->ctx = ctx = avformat_alloc_context();
1542 if (!ctx)
1543 return AVERROR(ENOMEM);
1544
1545 ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1546 if (!ctx->oformat)
1547 return AVERROR_MUXER_NOT_FOUND;
1548 ctx->interrupt_callback = s->interrupt_callback;
1549 ctx->opaque = s->opaque;
1550 ctx->io_close = s->io_close;
1551 ctx->io_close2 = s->io_close2;
1552 ctx->io_open = s->io_open;
1553 ctx->strict_std_compliance = s->strict_std_compliance;
1554
1555 if (!(st = avformat_new_stream(ctx, NULL)))
1556 return AVERROR(ENOMEM);
1557 avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1558 st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1559 st->time_base = s->streams[i]->time_base;
1560 st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1561 ctx->avoid_negative_ts = s->avoid_negative_ts;
1562 ctx->flags = s->flags;
1563
1564 os->parser = av_parser_init(st->codecpar->codec_id);
1565 if (os->parser) {
1566 os->parser_avctx = avcodec_alloc_context3(NULL);
1567 if (!os->parser_avctx)
1568 return AVERROR(ENOMEM);
1569 ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1570 if (ret < 0)
1571 return ret;
1572 // We only want to parse frame headers
1573 os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1574 }
1575
1576 if (c->single_file) {
1577 if (os->single_file_name)
1578 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1579 else
1580 snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1581 } else {
1582 ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1583 }
1584 snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1585 set_http_options(&opts, c);
1586 if (!c->single_file) {
1587 if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1588 return ret;
1589 ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1590 } else {
1591 ctx->url = av_strdup(filename);
1592 ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1593 }
1594 av_dict_free(&opts);
1595 if (ret < 0)
1596 return ret;
1597 os->init_start_pos = 0;
1598
1599 av_dict_copy(&opts, c->format_options, 0);
1600 if (!as->seg_duration)
1601 as->seg_duration = c->seg_duration;
1602 if (!as->frag_duration)
1603 as->frag_duration = c->frag_duration;
1604 if (as->frag_type < 0)
1605 as->frag_type = c->frag_type;
1606 os->seg_duration = as->seg_duration;
1607 os->frag_duration = as->frag_duration;
1608 os->frag_type = as->frag_type;
1609
1610 c->max_segment_duration = FFMAX(c->max_segment_duration, as->seg_duration);
1611
1612 if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1613 av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1614 return AVERROR(EINVAL);
1615 }
1616
1617 if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1618 av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1619 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1620 }
1621 if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1622 av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1623 return AVERROR(EINVAL);
1624 }
1625 if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1626 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1627 av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1628 os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1629 }
1630 if (os->frag_type != FRAG_TYPE_PFRAMES && as->trick_idx < 0)
1631 // Set this now if a parser isn't used
1632 os->coding_dependency = 1;
1633
1634 if (os->segment_type == SEGMENT_TYPE_MP4) {
1635 if (c->streaming)
1636 // skip_sidx : Reduce bitrate overhead
1637 // skip_trailer : Avoids growing memory usage with time
1638 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1639 else {
1640 if (c->global_sidx)
1641 av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1642 else
1643 av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1644 }
1645 if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1646 av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1647 else
1648 av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1649 if (os->frag_type == FRAG_TYPE_DURATION)
1650 av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1651 if (c->write_prft)
1652 av_dict_set(&opts, "write_prft", "wallclock", 0);
1653 } else {
1654 av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1655 av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1656 av_dict_set_int(&opts, "dash", 1, 0);
1657 av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1658 av_dict_set_int(&opts, "live", 1, 0);
1659 }
1660 ret = avformat_init_output(ctx, &opts);
1661 av_dict_free(&opts);
1662 if (ret < 0)
1663 return ret;
1664 os->ctx_inited = 1;
1665 avio_flush(ctx->pb);
1666
1667 av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1668
1669 s->streams[i]->time_base = st->time_base;
1670 // If the muxer wants to shift timestamps, request to have them shifted
1671 // already before being handed to this muxer, so we don't have mismatches
1672 // between the MPD and the actual segments.
1673 s->avoid_negative_ts = ctx->avoid_negative_ts;
1674 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1675 AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1676 AVRational par;
1677 if (avg_frame_rate.num > 0) {
1678 if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1679 as->min_frame_rate = avg_frame_rate;
1680 if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1681 as->max_frame_rate = avg_frame_rate;
1682 } else {
1683 as->ambiguous_frame_rate = 1;
1684 }
1685
1686 if (st->codecpar->width > as->max_width)
1687 as->max_width = st->codecpar->width;
1688 if (st->codecpar->height > as->max_height)
1689 as->max_height = st->codecpar->height;
1690
1691 if (st->sample_aspect_ratio.num)
1692 os->sar = st->sample_aspect_ratio;
1693 else
1694 os->sar = (AVRational){1,1};
1695 av_reduce(&par.num, &par.den,
1696 st->codecpar->width * (int64_t)os->sar.num,
1697 st->codecpar->height * (int64_t)os->sar.den,
1698 1024 * 1024);
1699
1700 if (as->par.num && av_cmp_q(par, as->par)) {
1701 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);
1702 return AVERROR(EINVAL);
1703 }
1704 as->par = par;
1705
1706 c->has_video = 1;
1707 }
1708
1709 set_codec_str(s, st->codecpar, &st->avg_frame_rate, os->codec_str,
1710 sizeof(os->codec_str));
1711 os->first_pts = AV_NOPTS_VALUE;
1712 os->max_pts = AV_NOPTS_VALUE;
1713 os->last_dts = AV_NOPTS_VALUE;
1714 os->segment_index = 1;
1715
1716 if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1717 c->nr_of_streams_to_flush++;
1718 }
1719
1720 if (!c->has_video && c->seg_duration <= 0) {
1721 av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1722 return AVERROR(EINVAL);
1723 }
1724 if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1725 av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1726
1727 c->nr_of_streams_flushed = 0;
1728 c->target_latency_refid = -1;
1729
1730 return 0;
1731 }
1732
dash_write_header(AVFormatContext *s)1733 static int dash_write_header(AVFormatContext *s)
1734 {
1735 DASHContext *c = s->priv_data;
1736 int i, ret;
1737 for (i = 0; i < s->nb_streams; i++) {
1738 OutputStream *os = &c->streams[i];
1739 if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1740 return ret;
1741
1742 // Flush init segment
1743 // Only for WebM segment, since for mp4 delay_moov is set and
1744 // the init segment is thus flushed after the first packets.
1745 if (os->segment_type == SEGMENT_TYPE_WEBM &&
1746 (ret = flush_init_segment(s, os)) < 0)
1747 return ret;
1748 }
1749 return ret;
1750 }
1751
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)1752 static int add_segment(OutputStream *os, const char *file,
1753 int64_t time, int64_t duration,
1754 int64_t start_pos, int64_t range_length,
1755 int64_t index_length, int next_exp_index)
1756 {
1757 int err;
1758 Segment *seg;
1759 if (os->nb_segments >= os->segments_size) {
1760 os->segments_size = (os->segments_size + 1) * 2;
1761 if ((err = av_reallocp_array(&os->segments, sizeof(*os->segments),
1762 os->segments_size)) < 0) {
1763 os->segments_size = 0;
1764 os->nb_segments = 0;
1765 return err;
1766 }
1767 }
1768 seg = av_mallocz(sizeof(*seg));
1769 if (!seg)
1770 return AVERROR(ENOMEM);
1771 av_strlcpy(seg->file, file, sizeof(seg->file));
1772 seg->time = time;
1773 seg->duration = duration;
1774 if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1775 seg->duration += seg->time;
1776 seg->time = 0;
1777 }
1778 seg->start_pos = start_pos;
1779 seg->range_length = range_length;
1780 seg->index_length = index_length;
1781 os->segments[os->nb_segments++] = seg;
1782 os->segment_index++;
1783 //correcting the segment index if it has fallen behind the expected value
1784 if (os->segment_index < next_exp_index) {
1785 av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1786 file, os->segment_index, next_exp_index);
1787 os->segment_index = next_exp_index;
1788 }
1789 return 0;
1790 }
1791
write_styp(AVIOContext *pb)1792 static void write_styp(AVIOContext *pb)
1793 {
1794 avio_wb32(pb, 24);
1795 ffio_wfourcc(pb, "styp");
1796 ffio_wfourcc(pb, "msdh");
1797 avio_wb32(pb, 0); /* minor */
1798 ffio_wfourcc(pb, "msdh");
1799 ffio_wfourcc(pb, "msix");
1800 }
1801
find_index_range(AVFormatContext *s, const char *full_path, int64_t pos, int *index_length)1802 static void find_index_range(AVFormatContext *s, const char *full_path,
1803 int64_t pos, int *index_length)
1804 {
1805 uint8_t buf[8];
1806 AVIOContext *pb;
1807 int ret;
1808
1809 ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1810 if (ret < 0)
1811 return;
1812 if (avio_seek(pb, pos, SEEK_SET) != pos) {
1813 ff_format_io_close(s, &pb);
1814 return;
1815 }
1816 ret = avio_read(pb, buf, 8);
1817 ff_format_io_close(s, &pb);
1818 if (ret < 8)
1819 return;
1820 if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1821 return;
1822 *index_length = AV_RB32(&buf[0]);
1823 }
1824
update_stream_extradata(AVFormatContext *s, OutputStream *os, AVPacket *pkt, AVRational *frame_rate)1825 static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1826 AVPacket *pkt, AVRational *frame_rate)
1827 {
1828 AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1829 uint8_t *extradata;
1830 size_t extradata_size;
1831 int ret;
1832
1833 if (par->extradata_size)
1834 return 0;
1835
1836 extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1837 if (!extradata_size)
1838 return 0;
1839
1840 ret = ff_alloc_extradata(par, extradata_size);
1841 if (ret < 0)
1842 return ret;
1843
1844 memcpy(par->extradata, extradata, extradata_size);
1845
1846 set_codec_str(s, par, frame_rate, os->codec_str, sizeof(os->codec_str));
1847
1848 return 0;
1849 }
1850
dashenc_delete_file(AVFormatContext *s, char *filename)1851 static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1852 DASHContext *c = s->priv_data;
1853 int http_base_proto = ff_is_http_proto(filename);
1854
1855 if (http_base_proto) {
1856 AVIOContext *out = NULL;
1857 AVDictionary *http_opts = NULL;
1858
1859 set_http_options(&http_opts, c);
1860 av_dict_set(&http_opts, "method", "DELETE", 0);
1861
1862 if (dashenc_io_open(s, &out, filename, &http_opts) < 0) {
1863 av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1864 }
1865
1866 av_dict_free(&http_opts);
1867 ff_format_io_close(s, &out);
1868 } else {
1869 int res = ffurl_delete(filename);
1870 if (res < 0) {
1871 char errbuf[AV_ERROR_MAX_STRING_SIZE];
1872 av_strerror(res, errbuf, sizeof(errbuf));
1873 av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR), "failed to delete %s: %s\n", filename, errbuf);
1874 }
1875 }
1876 }
1877
dashenc_delete_segment_file(AVFormatContext *s, const char* file)1878 static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1879 {
1880 DASHContext *c = s->priv_data;
1881 AVBPrint buf;
1882
1883 av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1884
1885 av_bprintf(&buf, "%s%s", c->dirname, file);
1886 if (!av_bprint_is_complete(&buf)) {
1887 av_bprint_finalize(&buf, NULL);
1888 av_log(s, AV_LOG_WARNING, "Out of memory for filename\n");
1889 return AVERROR(ENOMEM);
1890 }
1891
1892 dashenc_delete_file(s, buf.str);
1893
1894 av_bprint_finalize(&buf, NULL);
1895 return 0;
1896 }
1897
dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)1898 static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1899 {
1900 for (int i = 0; i < remove_count; ++i) {
1901 dashenc_delete_segment_file(s, os->segments[i]->file);
1902
1903 // Delete the segment regardless of whether the file was successfully deleted
1904 av_free(os->segments[i]);
1905 }
1906
1907 os->nb_segments -= remove_count;
1908 memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1909 }
1910
dash_flush(AVFormatContext *s, int final, int stream)1911 static int dash_flush(AVFormatContext *s, int final, int stream)
1912 {
1913 DASHContext *c = s->priv_data;
1914 int i, ret = 0;
1915
1916 const char *proto = avio_find_protocol_name(s->url);
1917 int use_rename = proto && !strcmp(proto, "file");
1918
1919 int cur_flush_segment_index = 0, next_exp_index = -1;
1920 if (stream >= 0) {
1921 cur_flush_segment_index = c->streams[stream].segment_index;
1922
1923 //finding the next segment's expected index, based on the current pts value
1924 if (c->use_template && !c->use_timeline && c->index_correction &&
1925 c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1926 c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1927 int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1928 c->streams[stream].first_pts,
1929 s->streams[stream]->time_base,
1930 AV_TIME_BASE_Q);
1931 next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1932 }
1933 }
1934
1935 for (i = 0; i < s->nb_streams; i++) {
1936 OutputStream *os = &c->streams[i];
1937 AVStream *st = s->streams[i];
1938 int range_length, index_length = 0;
1939 int64_t duration;
1940
1941 if (!os->packets_written)
1942 continue;
1943
1944 // Flush the single stream that got a keyframe right now.
1945 // Flush all audio streams as well, in sync with video keyframes,
1946 // but not the other video streams.
1947 if (stream >= 0 && i != stream) {
1948 if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1949 s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1950 continue;
1951 if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1952 continue;
1953 // Make sure we don't flush audio streams multiple times, when
1954 // all video streams are flushed one at a time.
1955 if (c->has_video && os->segment_index > cur_flush_segment_index)
1956 continue;
1957 }
1958
1959 if (c->single_file)
1960 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1961
1962 ret = flush_dynbuf(c, os, &range_length);
1963 if (ret < 0)
1964 break;
1965 os->packets_written = 0;
1966
1967 if (c->single_file) {
1968 find_index_range(s, os->full_path, os->pos, &index_length);
1969 } else {
1970 dashenc_io_close(s, &os->out, os->temp_path);
1971
1972 if (use_rename) {
1973 ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1974 if (ret < 0)
1975 break;
1976 }
1977 }
1978
1979 duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
1980 os->last_duration = FFMAX(os->last_duration, duration);
1981
1982 if (!os->muxer_overhead && os->max_pts > os->start_pts)
1983 os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1984 8 * AV_TIME_BASE) / duration;
1985 os->total_pkt_size = 0;
1986 os->total_pkt_duration = 0;
1987
1988 if (!os->bit_rate && !os->first_segment_bit_rate) {
1989 os->first_segment_bit_rate = (int64_t) range_length * 8 * AV_TIME_BASE / duration;
1990 }
1991 add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1992 av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1993
1994 os->pos += range_length;
1995 }
1996
1997 if (c->window_size) {
1998 for (i = 0; i < s->nb_streams; i++) {
1999 OutputStream *os = &c->streams[i];
2000 int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
2001 if (remove_count > 0)
2002 dashenc_delete_media_segments(s, os, remove_count);
2003 }
2004 }
2005
2006 if (final) {
2007 for (i = 0; i < s->nb_streams; i++) {
2008 OutputStream *os = &c->streams[i];
2009 if (os->ctx && os->ctx_inited) {
2010 int64_t file_size = avio_tell(os->ctx->pb);
2011 av_write_trailer(os->ctx);
2012 if (c->global_sidx) {
2013 int j, start_index, start_number;
2014 int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
2015 get_start_index_number(os, c, &start_index, &start_number);
2016 if (start_index >= os->nb_segments ||
2017 os->segment_type != SEGMENT_TYPE_MP4)
2018 continue;
2019 os->init_range_length += sidx_size;
2020 for (j = start_index; j < os->nb_segments; j++) {
2021 Segment *seg = os->segments[j];
2022 seg->start_pos += sidx_size;
2023 }
2024 }
2025
2026 }
2027 }
2028 }
2029 if (ret >= 0) {
2030 if (c->has_video && !final) {
2031 c->nr_of_streams_flushed++;
2032 if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
2033 return ret;
2034
2035 c->nr_of_streams_flushed = 0;
2036 }
2037 // In streaming mode the manifest is written at the beginning
2038 // of the segment instead
2039 if (!c->streaming || final)
2040 ret = write_manifest(s, final);
2041 }
2042 return ret;
2043 }
2044
dash_parse_prft(DASHContext *c, AVPacket *pkt)2045 static int dash_parse_prft(DASHContext *c, AVPacket *pkt)
2046 {
2047 OutputStream *os = &c->streams[pkt->stream_index];
2048 AVProducerReferenceTime *prft;
2049 size_t side_data_size;
2050
2051 prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
2052 if (!prft || side_data_size != sizeof(AVProducerReferenceTime) || (prft->flags && prft->flags != 24)) {
2053 // No encoder generated or user provided capture time AVProducerReferenceTime side data. Instead
2054 // of letting the mov muxer generate one, do it here so we can also use it for the manifest.
2055 prft = (AVProducerReferenceTime *)av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT,
2056 sizeof(AVProducerReferenceTime));
2057 if (!prft)
2058 return AVERROR(ENOMEM);
2059 prft->wallclock = av_gettime();
2060 prft->flags = 24;
2061 }
2062 if (os->first_pts == AV_NOPTS_VALUE) {
2063 os->producer_reference_time = *prft;
2064 if (c->target_latency_refid < 0)
2065 c->target_latency_refid = pkt->stream_index;
2066 }
2067
2068 return 0;
2069 }
2070
dash_write_packet(AVFormatContext *s, AVPacket *pkt)2071 static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
2072 {
2073 DASHContext *c = s->priv_data;
2074 AVStream *st = s->streams[pkt->stream_index];
2075 OutputStream *os = &c->streams[pkt->stream_index];
2076 AdaptationSet *as = &c->as[os->as_idx - 1];
2077 int64_t seg_end_duration, elapsed_duration;
2078 int ret;
2079
2080 ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
2081 if (ret < 0)
2082 return ret;
2083
2084 // Fill in a heuristic guess of the packet duration, if none is available.
2085 // The mp4 muxer will do something similar (for the last packet in a fragment)
2086 // if nothing is set (setting it for the other packets doesn't hurt).
2087 // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
2088 // invoke its heuristic (this doesn't have to be identical to that algorithm),
2089 // so that we know the exact timestamps of fragments.
2090 if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
2091 pkt->duration = pkt->dts - os->last_dts;
2092 os->last_dts = pkt->dts;
2093
2094 // If forcing the stream to start at 0, the mp4 muxer will set the start
2095 // timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
2096 if (os->first_pts == AV_NOPTS_VALUE &&
2097 s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
2098 pkt->pts -= pkt->dts;
2099 pkt->dts = 0;
2100 }
2101
2102 if (c->write_prft) {
2103 ret = dash_parse_prft(c, pkt);
2104 if (ret < 0)
2105 return ret;
2106 }
2107
2108 if (os->first_pts == AV_NOPTS_VALUE) {
2109 os->first_pts = pkt->pts;
2110 }
2111 os->last_pts = pkt->pts;
2112
2113 if (!c->availability_start_time[0]) {
2114 int64_t start_time_us = av_gettime();
2115 c->start_time_s = start_time_us / 1000000;
2116 format_date(c->availability_start_time,
2117 sizeof(c->availability_start_time), start_time_us);
2118 }
2119
2120 if (!os->packets_written)
2121 os->availability_time_offset = 0;
2122
2123 if (!os->availability_time_offset &&
2124 ((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
2125 (os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
2126 AdaptationSet *as = &c->as[os->as_idx - 1];
2127 int64_t frame_duration = 0;
2128
2129 switch (os->frag_type) {
2130 case FRAG_TYPE_DURATION:
2131 frame_duration = os->frag_duration;
2132 break;
2133 case FRAG_TYPE_EVERY_FRAME:
2134 frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2135 break;
2136 }
2137
2138 os->availability_time_offset = ((double) os->seg_duration -
2139 frame_duration) / AV_TIME_BASE;
2140 as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2141 }
2142
2143 if (c->use_template && !c->use_timeline) {
2144 elapsed_duration = pkt->pts - os->first_pts;
2145 seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2146 } else {
2147 elapsed_duration = pkt->pts - os->start_pts;
2148 seg_end_duration = os->seg_duration;
2149 }
2150
2151 if (os->parser &&
2152 (os->frag_type == FRAG_TYPE_PFRAMES ||
2153 as->trick_idx >= 0)) {
2154 // Parse the packets only in scenarios where it's needed
2155 uint8_t *data;
2156 int size;
2157 av_parser_parse2(os->parser, os->parser_avctx,
2158 &data, &size, pkt->data, pkt->size,
2159 pkt->pts, pkt->dts, pkt->pos);
2160
2161 os->coding_dependency |= os->parser->pict_type != AV_PICTURE_TYPE_I;
2162 }
2163
2164 if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2165 av_compare_ts(elapsed_duration, st->time_base,
2166 seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2167 if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2168 c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2169 st->time_base,
2170 AV_TIME_BASE_Q);
2171 c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2172 st->time_base,
2173 AV_TIME_BASE_Q);
2174
2175 if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2176 if (c->last_duration < os->last_duration*9/10 ||
2177 c->last_duration > os->last_duration*11/10) {
2178 av_log(s, AV_LOG_WARNING,
2179 "Segment durations differ too much, enable use_timeline "
2180 "and use_template, or keep a stricter keyframe interval\n");
2181 }
2182 }
2183 }
2184
2185 if (c->write_prft && os->producer_reference_time.wallclock && !os->producer_reference_time_str[0])
2186 format_date(os->producer_reference_time_str,
2187 sizeof(os->producer_reference_time_str),
2188 os->producer_reference_time.wallclock);
2189
2190 if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2191 return ret;
2192 }
2193
2194 if (!os->packets_written) {
2195 // If we wrote a previous segment, adjust the start time of the segment
2196 // to the end of the previous one (which is the same as the mp4 muxer
2197 // does). This avoids gaps in the timeline.
2198 if (os->max_pts != AV_NOPTS_VALUE)
2199 os->start_pts = os->max_pts;
2200 else
2201 os->start_pts = pkt->pts;
2202 }
2203 if (os->max_pts == AV_NOPTS_VALUE)
2204 os->max_pts = pkt->pts + pkt->duration;
2205 else
2206 os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2207
2208 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2209 os->frag_type == FRAG_TYPE_PFRAMES &&
2210 os->packets_written) {
2211 av_assert0(os->parser);
2212 if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2213 st->codecpar->video_delay &&
2214 !(os->last_flags & AV_PKT_FLAG_KEY)) ||
2215 pkt->flags & AV_PKT_FLAG_KEY) {
2216 ret = av_write_frame(os->ctx, NULL);
2217 if (ret < 0)
2218 return ret;
2219
2220 if (!os->availability_time_offset) {
2221 int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2222 AV_TIME_BASE_Q);
2223 os->availability_time_offset = ((double) os->seg_duration -
2224 frag_duration) / AV_TIME_BASE;
2225 as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2226 }
2227 }
2228 }
2229
2230 if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size && as->trick_idx < 0) {
2231 os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2232 c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2233 }
2234
2235 if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2236 return ret;
2237
2238 os->packets_written++;
2239 os->total_pkt_size += pkt->size;
2240 os->total_pkt_duration += pkt->duration;
2241 os->last_flags = pkt->flags;
2242
2243 if (!os->init_range_length)
2244 flush_init_segment(s, os);
2245
2246 //open the output context when the first frame of a segment is ready
2247 if (!c->single_file && os->packets_written == 1) {
2248 AVDictionary *opts = NULL;
2249 const char *proto = avio_find_protocol_name(s->url);
2250 int use_rename = proto && !strcmp(proto, "file");
2251 if (os->segment_type == SEGMENT_TYPE_MP4)
2252 write_styp(os->ctx->pb);
2253 os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2254 ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2255 os->media_seg_name, pkt->stream_index,
2256 os->segment_index, os->bit_rate, os->start_pts);
2257 snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2258 os->filename);
2259 snprintf(os->temp_path, sizeof(os->temp_path),
2260 use_rename ? "%s.tmp" : "%s", os->full_path);
2261 set_http_options(&opts, c);
2262 ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2263 av_dict_free(&opts);
2264 if (ret < 0) {
2265 return handle_io_open_error(s, ret, os->temp_path);
2266 }
2267
2268 // in streaming mode, the segments are available for playing
2269 // before fully written but the manifest is needed so that
2270 // clients and discover the segment filenames.
2271 if (c->streaming) {
2272 write_manifest(s, 0);
2273 }
2274
2275 if (c->lhls) {
2276 char *prefetch_url = use_rename ? NULL : os->filename;
2277 write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2278 }
2279 }
2280
2281 //write out the data immediately in streaming mode
2282 if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2283 int len = 0;
2284 uint8_t *buf = NULL;
2285 avio_flush(os->ctx->pb);
2286 len = avio_get_dyn_buf (os->ctx->pb, &buf);
2287 if (os->out) {
2288 avio_write(os->out, buf + os->written_len, len - os->written_len);
2289 avio_flush(os->out);
2290 }
2291 os->written_len = len;
2292 }
2293
2294 return ret;
2295 }
2296
dash_write_trailer(AVFormatContext *s)2297 static int dash_write_trailer(AVFormatContext *s)
2298 {
2299 DASHContext *c = s->priv_data;
2300 int i;
2301
2302 if (s->nb_streams > 0) {
2303 OutputStream *os = &c->streams[0];
2304 // If no segments have been written so far, try to do a crude
2305 // guess of the segment duration
2306 if (!c->last_duration)
2307 c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2308 s->streams[0]->time_base,
2309 AV_TIME_BASE_Q);
2310 c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2311 s->streams[0]->time_base,
2312 AV_TIME_BASE_Q);
2313 }
2314 dash_flush(s, 1, -1);
2315
2316 if (c->remove_at_exit) {
2317 for (i = 0; i < s->nb_streams; ++i) {
2318 OutputStream *os = &c->streams[i];
2319 dashenc_delete_media_segments(s, os, os->nb_segments);
2320 dashenc_delete_segment_file(s, os->initfile);
2321 if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2322 char filename[1024];
2323 get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2324 dashenc_delete_file(s, filename);
2325 }
2326 }
2327 dashenc_delete_file(s, s->url);
2328
2329 if (c->hls_playlist && c->master_playlist_created) {
2330 char filename[1024];
2331 snprintf(filename, sizeof(filename), "%s%s", c->dirname, c->hls_master_name);
2332 dashenc_delete_file(s, filename);
2333 }
2334 }
2335
2336 return 0;
2337 }
2338
dash_check_bitstream(AVFormatContext *s, AVStream *st, const AVPacket *avpkt)2339 static int dash_check_bitstream(AVFormatContext *s, AVStream *st,
2340 const AVPacket *avpkt)
2341 {
2342 DASHContext *c = s->priv_data;
2343 OutputStream *os = &c->streams[st->index];
2344 AVFormatContext *oc = os->ctx;
2345 if (oc->oformat->check_bitstream) {
2346 AVStream *const ost = oc->streams[0];
2347 int ret;
2348 ret = oc->oformat->check_bitstream(oc, ost, avpkt);
2349 if (ret == 1) {
2350 FFStream *const sti = ffstream(st);
2351 FFStream *const osti = ffstream(ost);
2352 sti->bsfc = osti->bsfc;
2353 osti->bsfc = NULL;
2354 }
2355 return ret;
2356 }
2357 return 1;
2358 }
2359
2360 #define OFFSET(x) offsetof(DASHContext, x)
2361 #define E AV_OPT_FLAG_ENCODING_PARAM
2362 static const AVOption options[] = {
2363 { "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 },
2364 { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2365 { "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 },
2366 { "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
2367 { "frag_duration", "fragment duration (in seconds, fractional value can be set)", OFFSET(frag_duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2368 { "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"},
2369 { "none", "one fragment per segment", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_NONE }, 0, UINT_MAX, E, "frag_type"},
2370 { "every_frame", "fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_EVERY_FRAME }, 0, UINT_MAX, E, "frag_type"},
2371 { "duration", "fragment at specific time intervals", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_DURATION }, 0, UINT_MAX, E, "frag_type"},
2372 { "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"},
2373 { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2374 { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2375 { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2376 { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2377 { "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 },
2378 { "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 },
2379 { "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 },
2380 { "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 },
2381 { "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
2382 { "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
2383 { "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
2384 { "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2385 { "hls_master_name", "HLS master playlist name", OFFSET(hls_master_name), AV_OPT_TYPE_STRING, {.str = "master.m3u8"}, 0, 0, E },
2386 { "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2387 { "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
2388 { "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2389 { "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},
2390 { "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 },
2391 { "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"},
2392 { "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, "segment_type"},
2393 { "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, "segment_type"},
2394 { "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, "segment_type"},
2395 { "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 },
2396 { "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 },
2397 { "ldash", "Enable Low-latency dash. Constrains the value of a few elements", OFFSET(ldash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2398 { "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},
2399 { "write_prft", "Write producer reference time element", OFFSET(write_prft), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, E},
2400 { "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"},
2401 { "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"},
2402 { "dvb_dash", "DVB-DASH profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DVB }, 0, UINT_MAX, E, "mpd_profile"},
2403 { "http_opts", "HTTP protocol options", OFFSET(http_opts), AV_OPT_TYPE_DICT, { .str = NULL }, 0, 0, E },
2404 { "target_latency", "Set desired target latency for Low-latency dash", OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2405 { "min_playback_rate", "Set desired minimum playback rate", OFFSET(min_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2406 { "max_playback_rate", "Set desired maximum playback rate", OFFSET(max_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2407 { "update_period", "Set the mpd update interval", OFFSET(update_period), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
2408 { NULL },
2409 };
2410
2411 static const AVClass dash_class = {
2412 .class_name = "dash muxer",
2413 .item_name = av_default_item_name,
2414 .option = options,
2415 .version = LIBAVUTIL_VERSION_INT,
2416 };
2417
2418 const AVOutputFormat ff_dash_muxer = {
2419 .name = "dash",
2420 .long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2421 .extensions = "mpd",
2422 .priv_data_size = sizeof(DASHContext),
2423 .audio_codec = AV_CODEC_ID_AAC,
2424 .video_codec = AV_CODEC_ID_H264,
2425 .flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2426 .init = dash_init,
2427 .write_header = dash_write_header,
2428 .write_packet = dash_write_packet,
2429 .write_trailer = dash_write_trailer,
2430 .deinit = dash_free,
2431 .check_bitstream = dash_check_bitstream,
2432 .priv_class = &dash_class,
2433 };
2434