FFmpeg coverage

Line	Branch	Exec	Source
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			#include <time.h>
26			#if HAVE_UNISTD_H
27			#include <unistd.h>
28			#endif
29
30			#include "libavutil/avassert.h"
31			#include "libavutil/avutil.h"
32			#include "libavutil/avstring.h"
33			#include "libavutil/bprint.h"
34			#include "libavutil/intreadwrite.h"
35			#include "libavutil/mathematics.h"
36			#include "libavutil/mem.h"
37			#include "libavutil/opt.h"
38			#include "libavutil/parseutils.h"
39			#include "libavutil/rational.h"
40			#include "libavutil/time.h"
41			#include "libavutil/time_internal.h"
42
43			#include "libavcodec/avcodec.h"
44
45			#include "avformat.h"
46			#include "avio_internal.h"
47			#include "hlsplaylist.h"
48			#if CONFIG_HTTP_PROTOCOL
49			#include "http.h"
50			#endif
51			#include "internal.h"
52			#include "mux.h"
53			#include "os_support.h"
54			#include "url.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			AVIOContext *http_delete;
181			int streaming;
182			int64_t timeout;
183			int index_correction;
184			AVDictionary *format_options;
185			int global_sidx;
186			SegmentType segment_type_option; /* segment type as specified in options */
187			int ignore_io_errors;
188			int lhls;
189			int ldash;
190			int master_publish_rate;
191			int nr_of_streams_to_flush;
192			int nr_of_streams_flushed;
193			int frag_type;
194			int write_prft;
195			int64_t max_gop_size;
196			int64_t max_segment_duration;
197			int profile;
198			int64_t target_latency;
199			int target_latency_refid;
200			AVRational min_playback_rate;
201			AVRational max_playback_rate;
202			int64_t update_period;
203			} DASHContext;
204
205		✗	static int dashenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
206			AVDictionary **options) {
207		✗	DASHContext *c = s->priv_data;
208		✗	int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
209		✗	int err = AVERROR_MUXER_NOT_FOUND;
210		✗	if (!*pb || !http_base_proto || !c->http_persistent) {
211		✗	err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
212			#if CONFIG_HTTP_PROTOCOL
213			} else {
214		✗	URLContext *http_url_context = ffio_geturlcontext(*pb);
215		✗	av_assert0(http_url_context);
216		✗	err = ff_http_do_new_request(http_url_context, filename);
217		✗	if (err < 0)
218		✗	ff_format_io_close(s, pb);
219			#endif
220			}
221		✗	return err;
222			}
223
224		✗	static void dashenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename) {
225		✗	DASHContext *c = s->priv_data;
226		✗	int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
227
228		✗	if (!*pb)
229		✗	return;
230
231		✗	if (!http_base_proto || !c->http_persistent) {
232		✗	ff_format_io_close(s, pb);
233			#if CONFIG_HTTP_PROTOCOL
234			} else {
235		✗	URLContext *http_url_context = ffio_geturlcontext(*pb);
236		✗	av_assert0(http_url_context);
237		✗	avio_flush(*pb);
238		✗	ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
239			#endif
240			}
241			}
242
243		✗	static const char *get_format_str(SegmentType segment_type)
244			{
245		✗	switch (segment_type) {
246		✗	case SEGMENT_TYPE_MP4: return "mp4";
247		✗	case SEGMENT_TYPE_WEBM: return "webm";
248			}
249		✗	return NULL;
250			}
251
252		✗	static const char *get_extension_str(SegmentType type, int single_file)
253			{
254		✗	switch (type) {
255
256		✗	case SEGMENT_TYPE_MP4: return single_file ? "mp4" : "m4s";
257		✗	case SEGMENT_TYPE_WEBM: return "webm";
258		✗	default: return NULL;
259			}
260			}
261
262		✗	static int handle_io_open_error(AVFormatContext *s, int err, char *url) {
263		✗	DASHContext *c = s->priv_data;
264		✗	av_log(s, c->ignore_io_errors ? AV_LOG_WARNING : AV_LOG_ERROR,
265		✗	"Unable to open %s for writing: %s\n", url, av_err2str(err));
266		✗	return c->ignore_io_errors ? 0 : err;
267			}
268
269		✗	static inline SegmentType select_segment_type(SegmentType segment_type, enum AVCodecID codec_id)
270			{
271		✗	if (segment_type == SEGMENT_TYPE_AUTO) {
272		✗	if (codec_id == AV_CODEC_ID_OPUS || codec_id == AV_CODEC_ID_VORBIS ||
273		✗	codec_id == AV_CODEC_ID_VP8 || codec_id == AV_CODEC_ID_VP9) {
274		✗	segment_type = SEGMENT_TYPE_WEBM;
275			} else {
276		✗	segment_type = SEGMENT_TYPE_MP4;
277			}
278			}
279
280		✗	return segment_type;
281			}
282
283		✗	static int init_segment_types(AVFormatContext *s)
284			{
285		✗	DASHContext *c = s->priv_data;
286		✗	int has_mp4_streams = 0;
287		✗	for (int i = 0; i < s->nb_streams; ++i) {
288		✗	OutputStream *os = &c->streams[i];
289		✗	SegmentType segment_type = select_segment_type(
290		✗	c->segment_type_option, s->streams[i]->codecpar->codec_id);
291		✗	os->segment_type = segment_type;
292		✗	os->format_name = get_format_str(segment_type);
293		✗	if (!os->format_name) {
294		✗	av_log(s, AV_LOG_ERROR, "Could not select DASH segment type for stream %d\n", i);
295		✗	return AVERROR_MUXER_NOT_FOUND;
296			}
297		✗	os->extension_name = get_extension_str(segment_type, c->single_file);
298		✗	if (!os->extension_name) {
299		✗	av_log(s, AV_LOG_ERROR, "Could not get extension type for stream %d\n", i);
300		✗	return AVERROR_MUXER_NOT_FOUND;
301			}
302
303		✗	has_mp4_streams |= segment_type == SEGMENT_TYPE_MP4;
304			}
305
306		✗	if (c->hls_playlist && !has_mp4_streams) {
307		✗	av_log(s, AV_LOG_WARNING, "No mp4 streams, disabling HLS manifest generation\n");
308		✗	c->hls_playlist = 0;
309			}
310
311		✗	return 0;
312			}
313
314		✗	static int flush_dynbuf(DASHContext *c, OutputStream *os, int *range_length)
315			{
316			uint8_t *buffer;
317
318		✗	if (!os->ctx->pb) {
319		✗	return AVERROR(EINVAL);
320			}
321
322			// flush
323		✗	av_write_frame(os->ctx, NULL);
324		✗	avio_flush(os->ctx->pb);
325
326		✗	if (!c->single_file) {
327			// write out to file
328		✗	*range_length = avio_close_dyn_buf(os->ctx->pb, &buffer);
329		✗	os->ctx->pb = NULL;
330		✗	if (os->out)
331		✗	avio_write(os->out, buffer + os->written_len, *range_length - os->written_len);
332		✗	os->written_len = 0;
333		✗	av_free(buffer);
334
335			// re-open buffer
336		✗	return avio_open_dyn_buf(&os->ctx->pb);
337			} else {
338		✗	*range_length = avio_tell(os->ctx->pb) - os->pos;
339		✗	return 0;
340			}
341			}
342
343		✗	static void set_http_options(AVDictionary **options, DASHContext *c)
344			{
345		✗	if (c->method)
346		✗	av_dict_set(options, "method", c->method, 0);
347		✗	av_dict_copy(options, c->http_opts, 0);
348		✗	if (c->user_agent)
349		✗	av_dict_set(options, "user_agent", c->user_agent, 0);
350		✗	if (c->http_persistent)
351		✗	av_dict_set_int(options, "multiple_requests", 1, 0);
352		✗	if (c->timeout >= 0)
353		✗	av_dict_set_int(options, "timeout", c->timeout, 0);
354		✗	}
355
356		✗	static void get_hls_playlist_name(char *playlist_name, int string_size,
357			const char *base_url, int id) {
358		✗	if (base_url)
359		✗	snprintf(playlist_name, string_size, "%smedia_%d.m3u8", base_url, id);
360			else
361		✗	snprintf(playlist_name, string_size, "media_%d.m3u8", id);
362		✗	}
363
364		✗	static void get_start_index_number(OutputStream *os, DASHContext *c,
365			int *start_index, int *start_number) {
366		✗	*start_index = 0;
367		✗	*start_number = 1;
368		✗	if (c->window_size) {
369		✗	*start_index = FFMAX(os->nb_segments - c->window_size, 0);
370		✗	*start_number = FFMAX(os->segment_index - c->window_size, 1);
371			}
372		✗	}
373
374		✗	static void write_hls_media_playlist(OutputStream *os, AVFormatContext *s,
375			int representation_id, int final,
376			char *prefetch_url) {
377		✗	DASHContext *c = s->priv_data;
378		✗	int timescale = os->ctx->streams[0]->time_base.den;
379			char temp_filename_hls[1024];
380			char filename_hls[1024];
381		✗	AVDictionary *http_opts = NULL;
382		✗	int target_duration = 0;
383		✗	int ret = 0;
384		✗	const char *proto = avio_find_protocol_name(c->dirname);
385		✗	int use_rename = proto && !strcmp(proto, "file");
386			int i, start_index, start_number;
387		✗	double prog_date_time = 0;
388
389		✗	get_start_index_number(os, c, &start_index, &start_number);
390
391		✗	if (!c->hls_playlist || start_index >= os->nb_segments ||
392		✗	os->segment_type != SEGMENT_TYPE_MP4)
393		✗	return;
394
395		✗	get_hls_playlist_name(filename_hls, sizeof(filename_hls),
396		✗	c->dirname, representation_id);
397
398		✗	snprintf(temp_filename_hls, sizeof(temp_filename_hls), use_rename ? "%s.tmp" : "%s", filename_hls);
399
400		✗	set_http_options(&http_opts, c);
401		✗	ret = dashenc_io_open(s, &c->m3u8_out, temp_filename_hls, &http_opts);
402		✗	av_dict_free(&http_opts);
403		✗	if (ret < 0) {
404		✗	handle_io_open_error(s, ret, temp_filename_hls);
405		✗	return;
406			}
407		✗	for (i = start_index; i < os->nb_segments; i++) {
408		✗	Segment *seg = os->segments[i];
409		✗	double duration = (double) seg->duration / timescale;
410		✗	if (target_duration <= duration)
411		✗	target_duration = lrint(duration);
412			}
413
414		✗	ff_hls_write_playlist_header(c->m3u8_out, 6, -1, target_duration,
415			start_number, PLAYLIST_TYPE_NONE, 0);
416
417		✗	ff_hls_write_init_file(c->m3u8_out, os->initfile, c->single_file,
418		✗	os->init_range_length, os->init_start_pos);
419
420		✗	for (i = start_index; i < os->nb_segments; i++) {
421		✗	Segment *seg = os->segments[i];
422
423		✗	if (fabs(prog_date_time) < 1e-7) {
424		✗	if (os->nb_segments == 1)
425		✗	prog_date_time = c->start_time_s;
426			else
427		✗	prog_date_time = seg->prog_date_time;
428			}
429		✗	seg->prog_date_time = prog_date_time;
430
431		✗	ret = ff_hls_write_file_entry(c->m3u8_out, 0, c->single_file,
432		✗	(double) seg->duration / timescale, 0,
433		✗	seg->range_length, seg->start_pos, NULL,
434		✗	c->single_file ? os->initfile : seg->file,
435			&prog_date_time, 0, 0, 0);
436		✗	if (ret < 0) {
437		✗	av_log(os->ctx, AV_LOG_WARNING, "ff_hls_write_file_entry get error\n");
438			}
439			}
440
441		✗	if (prefetch_url)
442		✗	avio_printf(c->m3u8_out, "#EXT-X-PREFETCH:%s\n", prefetch_url);
443
444		✗	if (final)
445		✗	ff_hls_write_end_list(c->m3u8_out);
446
447		✗	dashenc_io_close(s, &c->m3u8_out, temp_filename_hls);
448
449		✗	if (use_rename)
450		✗	ff_rename(temp_filename_hls, filename_hls, os->ctx);
451			}
452
453		✗	static int flush_init_segment(AVFormatContext *s, OutputStream *os)
454			{
455		✗	DASHContext *c = s->priv_data;
456			int ret, range_length;
457
458		✗	ret = flush_dynbuf(c, os, &range_length);
459		✗	if (ret < 0)
460		✗	return ret;
461
462		✗	os->pos = os->init_range_length = range_length;
463		✗	if (!c->single_file) {
464			char filename[1024];
465		✗	snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
466		✗	dashenc_io_close(s, &os->out, filename);
467			}
468		✗	return 0;
469			}
470
471		✗	static void dash_free(AVFormatContext *s)
472			{
473		✗	DASHContext *c = s->priv_data;
474			int i, j;
475
476		✗	if (c->as) {
477		✗	for (i = 0; i < c->nb_as; i++) {
478		✗	av_dict_free(&c->as[i].metadata);
479		✗	av_freep(&c->as[i].descriptor);
480			}
481		✗	av_freep(&c->as);
482		✗	c->nb_as = 0;
483			}
484
485		✗	if (!c->streams)
486		✗	return;
487		✗	for (i = 0; i < s->nb_streams; i++) {
488		✗	OutputStream *os = &c->streams[i];
489		✗	if (os->ctx && os->ctx->pb) {
490		✗	if (!c->single_file)
491		✗	ffio_free_dyn_buf(&os->ctx->pb);
492			else
493		✗	avio_close(os->ctx->pb);
494			}
495		✗	ff_format_io_close(s, &os->out);
496		✗	avformat_free_context(os->ctx);
497		✗	avcodec_free_context(&os->parser_avctx);
498		✗	av_parser_close(os->parser);
499		✗	for (j = 0; j < os->nb_segments; j++)
500		✗	av_free(os->segments[j]);
501		✗	av_free(os->segments);
502		✗	av_freep(&os->single_file_name);
503		✗	av_freep(&os->init_seg_name);
504		✗	av_freep(&os->media_seg_name);
505			}
506		✗	av_freep(&c->streams);
507
508		✗	ff_format_io_close(s, &c->mpd_out);
509		✗	ff_format_io_close(s, &c->m3u8_out);
510		✗	ff_format_io_close(s, &c->http_delete);
511			}
512
513		✗	static void output_segment_list(OutputStream *os, AVIOContext *out, AVFormatContext *s,
514			int representation_id, int final)
515			{
516		✗	DASHContext *c = s->priv_data;
517			int i, start_index, start_number;
518		✗	get_start_index_number(os, c, &start_index, &start_number);
519
520		✗	if (c->use_template) {
521		✗	int timescale = c->use_timeline ? os->ctx->streams[0]->time_base.den : AV_TIME_BASE;
522		✗	avio_printf(out, "\t\t\t\t<SegmentTemplate timescale=\"%d\" ", timescale);
523		✗	if (!c->use_timeline) {
524		✗	avio_printf(out, "duration=\"%"PRId64"\" ", os->seg_duration);
525		✗	if (c->streaming && os->availability_time_offset)
526		✗	avio_printf(out, "availabilityTimeOffset=\"%.3f\" ",
527			os->availability_time_offset);
528			}
529		✗	if (c->streaming && os->availability_time_offset && !final)
530		✗	avio_printf(out, "availabilityTimeComplete=\"false\" ");
531
532		✗	avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\"", os->init_seg_name, os->media_seg_name, c->use_timeline ? start_number : 1);
533		✗	if (c->presentation_time_offset)
534		✗	avio_printf(out, " presentationTimeOffset=\"%"PRId64"\"", c->presentation_time_offset);
535		✗	avio_printf(out, ">\n");
536		✗	if (c->use_timeline) {
537		✗	int64_t cur_time = 0;
538		✗	avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
539		✗	for (i = start_index; i < os->nb_segments; ) {
540		✗	Segment *seg = os->segments[i];
541		✗	int repeat = 0;
542		✗	avio_printf(out, "\t\t\t\t\t\t<S ");
543		✗	if (i == start_index || seg->time != cur_time) {
544		✗	cur_time = seg->time;
545		✗	avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
546			}
547		✗	avio_printf(out, "d=\"%"PRId64"\" ", seg->duration);
548		✗	while (i + repeat + 1 < os->nb_segments &&
549		✗	os->segments[i + repeat + 1]->duration == seg->duration &&
550		✗	os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
551		✗	repeat++;
552		✗	if (repeat > 0)
553		✗	avio_printf(out, "r=\"%d\" ", repeat);
554		✗	avio_printf(out, "/>\n");
555		✗	i += 1 + repeat;
556		✗	cur_time += (1 + repeat) * seg->duration;
557			}
558		✗	avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
559			}
560		✗	avio_printf(out, "\t\t\t\t</SegmentTemplate>\n");
561		✗	} else if (c->single_file) {
562		✗	avio_printf(out, "\t\t\t\t<BaseURL>%s</BaseURL>\n", os->initfile);
563		✗	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);
564		✗	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);
565		✗	for (i = start_index; i < os->nb_segments; i++) {
566		✗	Segment *seg = os->segments[i];
567		✗	avio_printf(out, "\t\t\t\t\t<SegmentURL mediaRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->range_length - 1);
568		✗	if (seg->index_length)
569		✗	avio_printf(out, "indexRange=\"%"PRId64"-%"PRId64"\" ", seg->start_pos, seg->start_pos + seg->index_length - 1);
570		✗	avio_printf(out, "/>\n");
571			}
572		✗	avio_printf(out, "\t\t\t\t</SegmentList>\n");
573			} else {
574		✗	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);
575		✗	avio_printf(out, "\t\t\t\t\t<Initialization sourceURL=\"%s\" />\n", os->initfile);
576		✗	for (i = start_index; i < os->nb_segments; i++) {
577		✗	Segment *seg = os->segments[i];
578		✗	avio_printf(out, "\t\t\t\t\t<SegmentURL media=\"%s\" />\n", seg->file);
579			}
580		✗	avio_printf(out, "\t\t\t\t</SegmentList>\n");
581			}
582		✗	if (!c->lhls || final) {
583		✗	write_hls_media_playlist(os, s, representation_id, final, NULL);
584			}
585
586		✗	}
587
588		✗	static char *xmlescape(const char *str) {
589		✗	int outlen = strlen(str)*3/2 + 6;
590		✗	char *out = av_realloc(NULL, outlen + 1);
591		✗	int pos = 0;
592		✗	if (!out)
593		✗	return NULL;
594		✗	for (; *str; str++) {
595		✗	if (pos + 6 > outlen) {
596			char *tmp;
597		✗	outlen = 2 * outlen + 6;
598		✗	tmp = av_realloc(out, outlen + 1);
599		✗	if (!tmp) {
600		✗	av_free(out);
601		✗	return NULL;
602			}
603		✗	out = tmp;
604			}
605		✗	if (*str == '&') {
606		✗	memcpy(&out[pos], "&amp;", 5);
607		✗	pos += 5;
608		✗	} else if (*str == '<') {
609		✗	memcpy(&out[pos], "&lt;", 4);
610		✗	pos += 4;
611		✗	} else if (*str == '>') {
612		✗	memcpy(&out[pos], "&gt;", 4);
613		✗	pos += 4;
614		✗	} else if (*str == '\'') {
615		✗	memcpy(&out[pos], "&apos;", 6);
616		✗	pos += 6;
617		✗	} else if (*str == '\"') {
618		✗	memcpy(&out[pos], "&quot;", 6);
619		✗	pos += 6;
620			} else {
621		✗	out[pos++] = *str;
622			}
623			}
624		✗	out[pos] = '\0';
625		✗	return out;
626			}
627
628		✗	static void write_time(AVIOContext *out, int64_t time)
629			{
630		✗	int seconds = time / AV_TIME_BASE;
631		✗	int fractions = time % AV_TIME_BASE;
632		✗	int minutes = seconds / 60;
633		✗	int hours = minutes / 60;
634		✗	seconds %= 60;
635		✗	minutes %= 60;
636		✗	avio_printf(out, "PT");
637		✗	if (hours)
638		✗	avio_printf(out, "%dH", hours);
639		✗	if (hours || minutes)
640		✗	avio_printf(out, "%dM", minutes);
641		✗	avio_printf(out, "%d.%dS", seconds, fractions / (AV_TIME_BASE / 10));
642		✗	}
643
644		✗	static void format_date(char *buf, int size, int64_t time_us)
645			{
646			struct tm *ptm, tmbuf;
647		✗	int64_t time_ms = time_us / 1000;
648		✗	const time_t time_s = time_ms / 1000;
649		✗	int millisec = time_ms - (time_s * 1000);
650		✗	ptm = gmtime_r(&time_s, &tmbuf);
651		✗	if (ptm) {
652			int len;
653		✗	if (!strftime(buf, size, "%Y-%m-%dT%H:%M:%S", ptm)) {
654		✗	buf[0] = '\0';
655		✗	return;
656			}
657		✗	len = strlen(buf);
658		✗	snprintf(buf + len, size - len, ".%03dZ", millisec);
659			}
660			}
661
662		✗	static int write_adaptation_set(AVFormatContext *s, AVIOContext *out, int as_index,
663			int final)
664			{
665		✗	DASHContext *c = s->priv_data;
666		✗	AdaptationSet *as = &c->as[as_index];
667			AVDictionaryEntry *lang, *role;
668			int i;
669
670		✗	avio_printf(out, "\t\t<AdaptationSet id=\"%d\" contentType=\"%s\" startWithSAP=\"1\" segmentAlignment=\"true\" bitstreamSwitching=\"true\"",
671		✗	as->id, as->media_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
672		✗	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)
673		✗	avio_printf(out, " maxFrameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
674		✗	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))
675		✗	avio_printf(out, " frameRate=\"%d/%d\"", as->max_frame_rate.num, as->max_frame_rate.den);
676		✗	if (as->media_type == AVMEDIA_TYPE_VIDEO) {
677		✗	avio_printf(out, " maxWidth=\"%d\" maxHeight=\"%d\"", as->max_width, as->max_height);
678		✗	avio_printf(out, " par=\"%d:%d\"", as->par.num, as->par.den);
679			}
680		✗	lang = av_dict_get(as->metadata, "language", NULL, 0);
681		✗	if (lang)
682		✗	avio_printf(out, " lang=\"%s\"", lang->value);
683		✗	avio_printf(out, ">\n");
684
685		✗	if (!final && c->ldash && as->max_frag_duration && !(c->profile & MPD_PROFILE_DVB))
686		✗	avio_printf(out, "\t\t\t<Resync dT=\"%"PRId64"\" type=\"0\"/>\n", as->max_frag_duration);
687		✗	if (as->trick_idx >= 0)
688		✗	avio_printf(out, "\t\t\t<EssentialProperty id=\"%d\" schemeIdUri=\"http://dashif.org/guidelines/trickmode\" value=\"%d\"/>\n", as->id, as->trick_idx);
689		✗	role = av_dict_get(as->metadata, "role", NULL, 0);
690		✗	if (role)
691		✗	avio_printf(out, "\t\t\t<Role schemeIdUri=\"urn:mpeg:dash:role:2011\" value=\"%s\"/>\n", role->value);
692		✗	if (as->descriptor)
693		✗	avio_printf(out, "\t\t\t%s\n", as->descriptor);
694		✗	for (i = 0; i < s->nb_streams; i++) {
695		✗	AVStream *st = s->streams[i];
696		✗	OutputStream *os = &c->streams[i];
697		✗	char bandwidth_str[64] = {'\0'};
698
699		✗	if (os->as_idx - 1 != as_index)
700		✗	continue;
701
702		✗	if (os->bit_rate > 0)
703		✗	snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->bit_rate);
704		✗	else if (final) {
705		✗	int average_bit_rate = os->pos * 8 * AV_TIME_BASE / c->total_duration;
706		✗	snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", average_bit_rate);
707		✗	} else if (os->first_segment_bit_rate > 0)
708		✗	snprintf(bandwidth_str, sizeof(bandwidth_str), " bandwidth=\"%d\"", os->first_segment_bit_rate);
709
710		✗	if (as->media_type == AVMEDIA_TYPE_VIDEO) {
711		✗	avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"video/%s\" codecs=\"%s\"%s width=\"%d\" height=\"%d\"",
712		✗	i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->width, s->streams[i]->codecpar->height);
713		✗	if (st->codecpar->field_order == AV_FIELD_UNKNOWN)
714		✗	avio_printf(out, " scanType=\"unknown\"");
715		✗	else if (st->codecpar->field_order != AV_FIELD_PROGRESSIVE)
716		✗	avio_printf(out, " scanType=\"interlaced\"");
717		✗	avio_printf(out, " sar=\"%d:%d\"", os->sar.num, os->sar.den);
718		✗	if (st->avg_frame_rate.num && av_cmp_q(as->min_frame_rate, as->max_frame_rate) < 0)
719		✗	avio_printf(out, " frameRate=\"%d/%d\"", st->avg_frame_rate.num, st->avg_frame_rate.den);
720		✗	if (as->trick_idx >= 0) {
721		✗	AdaptationSet *tas = &c->as[as->trick_idx];
722		✗	if (!as->ambiguous_frame_rate && !tas->ambiguous_frame_rate)
723		✗	avio_printf(out, " maxPlayoutRate=\"%d\"", FFMAX((int)av_q2d(av_div_q(tas->min_frame_rate, as->min_frame_rate)), 1));
724			}
725		✗	if (!os->coding_dependency)
726		✗	avio_printf(out, " codingDependency=\"false\"");
727		✗	avio_printf(out, ">\n");
728			} else {
729		✗	avio_printf(out, "\t\t\t<Representation id=\"%d\" mimeType=\"audio/%s\" codecs=\"%s\"%s audioSamplingRate=\"%d\">\n",
730		✗	i, os->format_name, os->codec_str, bandwidth_str, s->streams[i]->codecpar->sample_rate);
731		✗	avio_printf(out, "\t\t\t\t<AudioChannelConfiguration schemeIdUri=\"urn:mpeg:dash:23003:3:audio_channel_configuration:2011\" value=\"%d\" />\n",
732		✗	s->streams[i]->codecpar->ch_layout.nb_channels);
733			}
734		✗	if (!final && c->write_prft && os->producer_reference_time_str[0]) {
735		✗	avio_printf(out, "\t\t\t\t<ProducerReferenceTime id=\"%d\" inband=\"true\" type=\"%s\" wallClockTime=\"%s\" presentationTime=\"%"PRId64"\">\n",
736		✗	i, os->producer_reference_time.flags ? "captured" : "encoder", os->producer_reference_time_str, c->presentation_time_offset);
737		✗	avio_printf(out, "\t\t\t\t\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
738		✗	avio_printf(out, "\t\t\t\t</ProducerReferenceTime>\n");
739			}
740		✗	if (!final && c->ldash && os->gop_size && os->frag_type != FRAG_TYPE_NONE && !(c->profile & MPD_PROFILE_DVB) &&
741		✗	(os->frag_type != FRAG_TYPE_DURATION || os->frag_duration != os->seg_duration))
742		✗	avio_printf(out, "\t\t\t\t<Resync dT=\"%"PRId64"\" type=\"1\"/>\n", os->gop_size);
743		✗	output_segment_list(os, out, s, i, final);
744		✗	avio_printf(out, "\t\t\t</Representation>\n");
745			}
746		✗	avio_printf(out, "\t\t</AdaptationSet>\n");
747
748		✗	return 0;
749			}
750
751		✗	static int add_adaptation_set(AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
752			{
753		✗	DASHContext *c = s->priv_data;
754			void *mem;
755
756		✗	if (c->profile & MPD_PROFILE_DVB && (c->nb_as + 1) > 16) {
757		✗	av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Adaptation Sets\n");
758		✗	return AVERROR(EINVAL);
759			}
760		✗	mem = av_realloc(c->as, sizeof(*c->as) * (c->nb_as + 1));
761		✗	if (!mem)
762		✗	return AVERROR(ENOMEM);
763		✗	c->as = mem;
764		✗	++c->nb_as;
765
766		✗	*as = &c->as[c->nb_as - 1];
767		✗	memset(*as, 0, sizeof(**as));
768		✗	(*as)->media_type = type;
769		✗	(*as)->frag_type = -1;
770		✗	(*as)->trick_idx = -1;
771
772		✗	return 0;
773			}
774
775		✗	static int adaptation_set_add_stream(AVFormatContext *s, int as_idx, int i)
776			{
777		✗	DASHContext *c = s->priv_data;
778		✗	AdaptationSet *as = &c->as[as_idx - 1];
779		✗	OutputStream *os = &c->streams[i];
780
781		✗	if (as->media_type != s->streams[i]->codecpar->codec_type) {
782		✗	av_log(s, AV_LOG_ERROR, "Codec type of stream %d doesn't match AdaptationSet's media type\n", i);
783		✗	return AVERROR(EINVAL);
784		✗	} else if (os->as_idx) {
785		✗	av_log(s, AV_LOG_ERROR, "Stream %d is already assigned to an AdaptationSet\n", i);
786		✗	return AVERROR(EINVAL);
787			}
788		✗	if (c->profile & MPD_PROFILE_DVB && (as->nb_streams + 1) > 16) {
789		✗	av_log(s, AV_LOG_ERROR, "DVB-DASH profile allows a max of 16 Representations per Adaptation Set\n");
790		✗	return AVERROR(EINVAL);
791			}
792		✗	os->as_idx = as_idx;
793		✗	++as->nb_streams;
794
795		✗	return 0;
796			}
797
798		✗	static int parse_adaptation_sets(AVFormatContext *s)
799			{
800		✗	DASHContext *c = s->priv_data;
801		✗	const char *p = c->adaptation_sets;
802			enum { new_set, parse_default, parsing_streams, parse_seg_duration, parse_frag_duration } state;
803			AdaptationSet *as;
804			int i, n, ret;
805
806			// default: one AdaptationSet for each stream
807		✗	if (!p) {
808		✗	for (i = 0; i < s->nb_streams; i++) {
809		✗	if ((ret = add_adaptation_set(s, &as, s->streams[i]->codecpar->codec_type)) < 0)
810		✗	return ret;
811		✗	as->id = i;
812
813		✗	c->streams[i].as_idx = c->nb_as;
814		✗	++as->nb_streams;
815			}
816		✗	goto end;
817			}
818
819			// syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
820			// option id=0,descriptor=descriptor_str,streams=0,1,2 and so on
821			// option id=0,seg_duration=2.5,frag_duration=0.5,streams=0,1,2
822			// id=1,trick_id=0,seg_duration=10,frag_type=none,streams=3 and so on
823			// descriptor is useful to the scheme defined by ISO/IEC 23009-1:2014/Amd.2:2015
824			// descriptor_str should be a self-closing xml tag.
825			// seg_duration and frag_duration have the same syntax as the global options of
826			// the same name, and the former have precedence over them if set.
827		✗	state = new_set;
828		✗	while (*p) {
829		✗	if (*p == ' ') {
830		✗	p++;
831		✗	continue;
832		✗	} else if (state == new_set && av_strstart(p, "id=", &p)) {
833			char id_str[10], *end_str;
834
835		✗	n = strcspn(p, ",");
836		✗	snprintf(id_str, sizeof(id_str), "%.*s", n, p);
837
838		✗	i = strtol(id_str, &end_str, 10);
839		✗	if (id_str == end_str || i < 0 || i > c->nb_as) {
840		✗	av_log(s, AV_LOG_ERROR, "\"%s\" is not a valid value for an AdaptationSet id\n", id_str);
841		✗	return AVERROR(EINVAL);
842			}
843
844		✗	if ((ret = add_adaptation_set(s, &as, AVMEDIA_TYPE_UNKNOWN)) < 0)
845		✗	return ret;
846		✗	as->id = i;
847
848		✗	p += n;
849		✗	if (*p)
850		✗	p++;
851		✗	state = parse_default;
852		✗	} else if (state != new_set && av_strstart(p, "seg_duration=", &p)) {
853		✗	state = parse_seg_duration;
854		✗	} else if (state != new_set && av_strstart(p, "frag_duration=", &p)) {
855		✗	state = parse_frag_duration;
856		✗	} else if (state == parse_seg_duration || state == parse_frag_duration) {
857			char str[32];
858		✗	int64_t usecs = 0;
859
860		✗	n = strcspn(p, ",");
861		✗	snprintf(str, sizeof(str), "%.*s", n, p);
862		✗	p += n;
863		✗	if (*p)
864		✗	p++;
865
866		✗	ret = av_parse_time(&usecs, str, 1);
867		✗	if (ret < 0) {
868		✗	av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as duration\n", str);
869		✗	return ret;
870			}
871
872		✗	if (state == parse_seg_duration)
873		✗	as->seg_duration = usecs;
874			else
875		✗	as->frag_duration = usecs;
876		✗	state = parse_default;
877		✗	} else if (state != new_set && av_strstart(p, "frag_type=", &p)) {
878			char type_str[16];
879
880		✗	n = strcspn(p, ",");
881		✗	snprintf(type_str, sizeof(type_str), "%.*s", n, p);
882		✗	p += n;
883		✗	if (*p)
884		✗	p++;
885
886		✗	if (!strcmp(type_str, "duration"))
887		✗	as->frag_type = FRAG_TYPE_DURATION;
888		✗	else if (!strcmp(type_str, "pframes"))
889		✗	as->frag_type = FRAG_TYPE_PFRAMES;
890		✗	else if (!strcmp(type_str, "every_frame"))
891		✗	as->frag_type = FRAG_TYPE_EVERY_FRAME;
892		✗	else if (!strcmp(type_str, "none"))
893		✗	as->frag_type = FRAG_TYPE_NONE;
894			else {
895		✗	av_log(s, AV_LOG_ERROR, "Unable to parse option value \"%s\" as fragment type\n", type_str);
896		✗	return ret;
897			}
898		✗	state = parse_default;
899		✗	} else if (state != new_set && av_strstart(p, "descriptor=", &p)) {
900		✗	n = strcspn(p, ">") + 1; //followed by one comma, so plus 1
901		✗	if (n < strlen(p)) {
902		✗	as->descriptor = av_strndup(p, n);
903			} else {
904		✗	av_log(s, AV_LOG_ERROR, "Parse error, descriptor string should be a self-closing xml tag\n");
905		✗	return AVERROR(EINVAL);
906			}
907		✗	p += n;
908		✗	if (*p)
909		✗	p++;
910		✗	state = parse_default;
911		✗	} else if ((state != new_set) && av_strstart(p, "trick_id=", &p)) {
912			char trick_id_str[10], *end_str;
913
914		✗	n = strcspn(p, ",");
915		✗	snprintf(trick_id_str, sizeof(trick_id_str), "%.*s", n, p);
916		✗	p += n;
917
918		✗	as->trick_idx = strtol(trick_id_str, &end_str, 10);
919		✗	if (trick_id_str == end_str || as->trick_idx < 0)
920		✗	return AVERROR(EINVAL);
921
922		✗	if (*p)
923		✗	p++;
924		✗	state = parse_default;
925		✗	} else if ((state != new_set) && av_strstart(p, "streams=", &p)) { //descriptor and durations are optional
926		✗	state = parsing_streams;
927		✗	} else if (state == parsing_streams) {
928		✗	AdaptationSet *as = &c->as[c->nb_as - 1];
929			char idx_str[8], *end_str;
930
931		✗	n = strcspn(p, " ,");
932		✗	snprintf(idx_str, sizeof(idx_str), "%.*s", n, p);
933		✗	p += n;
934
935			// if value is "a" or "v", map all streams of that type
936		✗	if (as->media_type == AVMEDIA_TYPE_UNKNOWN && (idx_str[0] == 'v' || idx_str[0] == 'a')) {
937		✗	enum AVMediaType type = (idx_str[0] == 'v') ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
938		✗	av_log(s, AV_LOG_DEBUG, "Map all streams of type %s\n", idx_str);
939
940		✗	for (i = 0; i < s->nb_streams; i++) {
941		✗	if (s->streams[i]->codecpar->codec_type != type)
942		✗	continue;
943
944		✗	as->media_type = s->streams[i]->codecpar->codec_type;
945
946		✗	if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
947		✗	return ret;
948			}
949			} else { // select single stream
950		✗	i = strtol(idx_str, &end_str, 10);
951		✗	if (idx_str == end_str || i < 0 || i >= s->nb_streams) {
952		✗	av_log(s, AV_LOG_ERROR, "Selected stream \"%s\" not found!\n", idx_str);
953		✗	return AVERROR(EINVAL);
954			}
955		✗	av_log(s, AV_LOG_DEBUG, "Map stream %d\n", i);
956
957		✗	if (as->media_type == AVMEDIA_TYPE_UNKNOWN) {
958		✗	as->media_type = s->streams[i]->codecpar->codec_type;
959			}
960
961		✗	if ((ret = adaptation_set_add_stream(s, c->nb_as, i)) < 0)
962		✗	return ret;
963			}
964
965		✗	if (*p == ' ')
966		✗	state = new_set;
967		✗	if (*p)
968		✗	p++;
969			} else {
970		✗	return AVERROR(EINVAL);
971			}
972			}
973
974		✗	end:
975			// check for unassigned streams
976		✗	for (i = 0; i < s->nb_streams; i++) {
977		✗	OutputStream *os = &c->streams[i];
978		✗	if (!os->as_idx) {
979		✗	av_log(s, AV_LOG_ERROR, "Stream %d is not mapped to an AdaptationSet\n", i);
980		✗	return AVERROR(EINVAL);
981			}
982			}
983
984			// check references for trick mode AdaptationSet
985		✗	for (i = 0; i < c->nb_as; i++) {
986		✗	as = &c->as[i];
987		✗	if (as->trick_idx < 0)
988		✗	continue;
989		✗	for (n = 0; n < c->nb_as; n++) {
990		✗	if (c->as[n].id == as->trick_idx)
991		✗	break;
992			}
993		✗	if (n >= c->nb_as) {
994		✗	av_log(s, AV_LOG_ERROR, "reference AdaptationSet id \"%d\" not found for trick mode AdaptationSet id \"%d\"\n", as->trick_idx, as->id);
995		✗	return AVERROR(EINVAL);
996			}
997			}
998
999		✗	return 0;
1000			}
1001
1002		✗	static int write_manifest(AVFormatContext *s, int final)
1003			{
1004		✗	DASHContext *c = s->priv_data;
1005			AVIOContext *out;
1006			char temp_filename[1024];
1007			int ret, i;
1008		✗	const char *proto = avio_find_protocol_name(s->url);
1009		✗	int use_rename = proto && !strcmp(proto, "file");
1010			static unsigned int warned_non_file = 0;
1011		✗	AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
1012		✗	AVDictionary *opts = NULL;
1013
1014		✗	if (!use_rename && !warned_non_file++)
1015		✗	av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
1016
1017		✗	snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->url);
1018		✗	set_http_options(&opts, c);
1019		✗	ret = dashenc_io_open(s, &c->mpd_out, temp_filename, &opts);
1020		✗	av_dict_free(&opts);
1021		✗	if (ret < 0) {
1022		✗	return handle_io_open_error(s, ret, temp_filename);
1023			}
1024		✗	out = c->mpd_out;
1025		✗	avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
1026		✗	avio_printf(out, "<MPD xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n"
1027			"\txmlns=\"urn:mpeg:dash:schema:mpd:2011\"\n"
1028			"\txmlns:xlink=\"http://www.w3.org/1999/xlink\"\n"
1029			"\txsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd\"\n"
1030			"\tprofiles=\"");
1031		✗	if (c->profile & MPD_PROFILE_DASH)
1032		✗	avio_printf(out, "%s%s", "urn:mpeg:dash:profile:isoff-live:2011", c->profile & MPD_PROFILE_DVB ? "," : "\"\n");
1033		✗	if (c->profile & MPD_PROFILE_DVB)
1034		✗	avio_printf(out, "%s", "urn:dvb:dash:profile:dvb-dash:2014\"\n");
1035		✗	avio_printf(out, "\ttype=\"%s\"\n",
1036			final ? "static" : "dynamic");
1037		✗	if (final) {
1038		✗	avio_printf(out, "\tmediaPresentationDuration=\"");
1039		✗	write_time(out, c->total_duration);
1040		✗	avio_printf(out, "\"\n");
1041			} else {
1042		✗	int64_t update_period = c->last_duration / AV_TIME_BASE;
1043			char now_str[100];
1044		✗	if (c->use_template && !c->use_timeline)
1045		✗	update_period = 500;
1046		✗	if (c->update_period)
1047		✗	update_period = c->update_period;
1048		✗	avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
1049		✗	if (!c->ldash)
1050		✗	avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
1051		✗	if (c->availability_start_time[0])
1052		✗	avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
1053		✗	format_date(now_str, sizeof(now_str), av_gettime());
1054		✗	if (now_str[0])
1055		✗	avio_printf(out, "\tpublishTime=\"%s\"\n", now_str);
1056		✗	if (c->window_size && c->use_template) {
1057		✗	avio_printf(out, "\ttimeShiftBufferDepth=\"");
1058		✗	write_time(out, c->last_duration * c->window_size);
1059		✗	avio_printf(out, "\"\n");
1060			}
1061			}
1062		✗	avio_printf(out, "\tmaxSegmentDuration=\"");
1063		✗	write_time(out, c->max_segment_duration);
1064		✗	avio_printf(out, "\"\n");
1065		✗	avio_printf(out, "\tminBufferTime=\"");
1066		✗	write_time(out, c->ldash && c->max_gop_size ? c->max_gop_size : c->last_duration * 2);
1067		✗	avio_printf(out, "\">\n");
1068		✗	avio_printf(out, "\t<ProgramInformation>\n");
1069		✗	if (title) {
1070		✗	char *escaped = xmlescape(title->value);
1071		✗	avio_printf(out, "\t\t<Title>%s</Title>\n", escaped);
1072		✗	av_free(escaped);
1073			}
1074		✗	avio_printf(out, "\t</ProgramInformation>\n");
1075
1076		✗	avio_printf(out, "\t<ServiceDescription id=\"0\">\n");
1077		✗	if (!final && c->target_latency && c->target_latency_refid >= 0) {
1078		✗	avio_printf(out, "\t\t<Latency target=\"%"PRId64"\"", c->target_latency / 1000);
1079		✗	if (s->nb_streams > 1)
1080		✗	avio_printf(out, " referenceId=\"%d\"", c->target_latency_refid);
1081		✗	avio_printf(out, "/>\n");
1082			}
1083		✗	if (av_cmp_q(c->min_playback_rate, (AVRational) {1, 1}) ||
1084		✗	av_cmp_q(c->max_playback_rate, (AVRational) {1, 1}))
1085		✗	avio_printf(out, "\t\t<PlaybackRate min=\"%.2f\" max=\"%.2f\"/>\n",
1086			av_q2d(c->min_playback_rate), av_q2d(c->max_playback_rate));
1087		✗	avio_printf(out, "\t</ServiceDescription>\n");
1088
1089		✗	if (c->window_size && s->nb_streams > 0 && c->streams[0].nb_segments > 0 && !c->use_template) {
1090		✗	OutputStream *os = &c->streams[0];
1091		✗	int start_index = FFMAX(os->nb_segments - c->window_size, 0);
1092		✗	int64_t start_time = av_rescale_q(os->segments[start_index]->time, s->streams[0]->time_base, AV_TIME_BASE_Q);
1093		✗	avio_printf(out, "\t<Period id=\"0\" start=\"");
1094		✗	write_time(out, start_time);
1095		✗	avio_printf(out, "\">\n");
1096			} else {
1097		✗	avio_printf(out, "\t<Period id=\"0\" start=\"PT0.0S\">\n");
1098			}
1099
1100		✗	for (i = 0; i < c->nb_as; i++) {
1101		✗	if ((ret = write_adaptation_set(s, out, i, final)) < 0)
1102		✗	return ret;
1103			}
1104		✗	avio_printf(out, "\t</Period>\n");
1105
1106		✗	if (c->utc_timing_url)
1107		✗	avio_printf(out, "\t<UTCTiming schemeIdUri=\"urn:mpeg:dash:utc:http-xsdate:2014\" value=\"%s\"/>\n", c->utc_timing_url);
1108
1109		✗	avio_printf(out, "</MPD>\n");
1110		✗	avio_flush(out);
1111		✗	dashenc_io_close(s, &c->mpd_out, temp_filename);
1112
1113		✗	if (use_rename) {
1114		✗	if ((ret = ff_rename(temp_filename, s->url, s)) < 0)
1115		✗	return ret;
1116			}
1117
1118		✗	if (c->hls_playlist) {
1119			char filename_hls[1024];
1120
1121			// Publish master playlist only the configured rate
1122		✗	if (c->master_playlist_created && (!c->master_publish_rate ||
1123		✗	c->streams[0].segment_index % c->master_publish_rate))
1124		✗	return 0;
1125
1126		✗	if (*c->dirname)
1127		✗	snprintf(filename_hls, sizeof(filename_hls), "%s%s", c->dirname, c->hls_master_name);
1128			else
1129		✗	snprintf(filename_hls, sizeof(filename_hls), "%s", c->hls_master_name);
1130
1131		✗	snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", filename_hls);
1132
1133		✗	set_http_options(&opts, c);
1134		✗	ret = dashenc_io_open(s, &c->m3u8_out, temp_filename, &opts);
1135		✗	av_dict_free(&opts);
1136		✗	if (ret < 0) {
1137		✗	return handle_io_open_error(s, ret, temp_filename);
1138			}
1139
1140		✗	ff_hls_write_playlist_version(c->m3u8_out, 7);
1141
1142		✗	if (c->has_video) {
1143			// treat audio streams as alternative renditions for video streams
1144		✗	const char *audio_group = "A1";
1145		✗	char audio_codec_str[128] = "\0";
1146		✗	int is_default = 1;
1147		✗	int max_audio_bitrate = 0;
1148
1149		✗	for (i = 0; i < s->nb_streams; i++) {
1150			char playlist_file[64];
1151		✗	AVStream *st = s->streams[i];
1152		✗	OutputStream *os = &c->streams[i];
1153		✗	if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1154		✗	continue;
1155		✗	if (os->segment_type != SEGMENT_TYPE_MP4)
1156		✗	continue;
1157		✗	get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1158		✗	ff_hls_write_audio_rendition(c->m3u8_out, audio_group,
1159			playlist_file, NULL, i, is_default,
1160		✗	s->streams[i]->codecpar->ch_layout.nb_channels);
1161		✗	max_audio_bitrate = FFMAX(st->codecpar->bit_rate +
1162			os->muxer_overhead, max_audio_bitrate);
1163		✗	if (!av_strnstr(audio_codec_str, os->codec_str, sizeof(audio_codec_str))) {
1164		✗	if (strlen(audio_codec_str))
1165		✗	av_strlcat(audio_codec_str, ",", sizeof(audio_codec_str));
1166		✗	av_strlcat(audio_codec_str, os->codec_str, sizeof(audio_codec_str));
1167			}
1168		✗	is_default = 0;
1169			}
1170
1171		✗	for (i = 0; i < s->nb_streams; i++) {
1172			char playlist_file[64];
1173			char codec_str[128];
1174		✗	AVStream *st = s->streams[i];
1175		✗	OutputStream *os = &c->streams[i];
1176		✗	const char *agroup = NULL;
1177		✗	int stream_bitrate = os->muxer_overhead;
1178		✗	if (os->bit_rate > 0)
1179		✗	stream_bitrate += os->bit_rate;
1180		✗	else if (final)
1181		✗	stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1182		✗	else if (os->first_segment_bit_rate > 0)
1183		✗	stream_bitrate += os->first_segment_bit_rate;
1184		✗	if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1185		✗	continue;
1186		✗	if (os->segment_type != SEGMENT_TYPE_MP4)
1187		✗	continue;
1188		✗	av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1189		✗	if (max_audio_bitrate) {
1190		✗	agroup = audio_group;
1191		✗	stream_bitrate += max_audio_bitrate;
1192		✗	av_strlcat(codec_str, ",", sizeof(codec_str));
1193		✗	av_strlcat(codec_str, audio_codec_str, sizeof(codec_str));
1194			}
1195		✗	get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1196		✗	ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate, 0,
1197			playlist_file, agroup,
1198			codec_str, NULL, NULL);
1199			}
1200
1201			} else {
1202			// treat audio streams as separate renditions
1203
1204		✗	for (i = 0; i < s->nb_streams; i++) {
1205			char playlist_file[64];
1206			char codec_str[128];
1207		✗	AVStream *st = s->streams[i];
1208		✗	OutputStream *os = &c->streams[i];
1209		✗	int stream_bitrate = os->muxer_overhead;
1210		✗	if (os->bit_rate > 0)
1211		✗	stream_bitrate += os->bit_rate;
1212		✗	else if (final)
1213		✗	stream_bitrate += os->pos * 8 * AV_TIME_BASE / c->total_duration;
1214		✗	else if (os->first_segment_bit_rate > 0)
1215		✗	stream_bitrate += os->first_segment_bit_rate;
1216		✗	if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1217		✗	continue;
1218		✗	if (os->segment_type != SEGMENT_TYPE_MP4)
1219		✗	continue;
1220		✗	av_strlcpy(codec_str, os->codec_str, sizeof(codec_str));
1221		✗	get_hls_playlist_name(playlist_file, sizeof(playlist_file), NULL, i);
1222		✗	ff_hls_write_stream_info(st, c->m3u8_out, stream_bitrate, 0,
1223			playlist_file, NULL,
1224			codec_str, NULL, NULL);
1225			}
1226			}
1227
1228		✗	dashenc_io_close(s, &c->m3u8_out, temp_filename);
1229		✗	if (use_rename)
1230		✗	if ((ret = ff_rename(temp_filename, filename_hls, s)) < 0)
1231		✗	return ret;
1232		✗	c->master_playlist_created = 1;
1233			}
1234
1235		✗	return 0;
1236			}
1237
1238		✗	static int dict_copy_entry(AVDictionary **dst, const AVDictionary *src, const char *key)
1239			{
1240		✗	AVDictionaryEntry *entry = av_dict_get(src, key, NULL, 0);
1241		✗	if (entry)
1242		✗	av_dict_set(dst, key, entry->value, AV_DICT_DONT_OVERWRITE);
1243		✗	return 0;
1244			}
1245
1246		✗	static int dash_init(AVFormatContext *s)
1247			{
1248		✗	DASHContext *c = s->priv_data;
1249		✗	int ret = 0, i;
1250			char *ptr;
1251			char basename[1024];
1252
1253		✗	c->nr_of_streams_to_flush = 0;
1254		✗	if (c->single_file_name)
1255		✗	c->single_file = 1;
1256		✗	if (c->single_file)
1257		✗	c->use_template = 0;
1258
1259		✗	if (!c->profile) {
1260		✗	av_log(s, AV_LOG_ERROR, "At least one profile must be enabled.\n");
1261		✗	return AVERROR(EINVAL);
1262			}
1263		✗	if (c->lhls && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
1264		✗	av_log(s, AV_LOG_ERROR,
1265			"LHLS is experimental, Please set -strict experimental in order to enable it.\n");
1266		✗	return AVERROR_EXPERIMENTAL;
1267			}
1268
1269		✗	if (c->lhls && !c->streaming) {
1270		✗	av_log(s, AV_LOG_WARNING, "Enabling streaming as LHLS is enabled\n");
1271		✗	c->streaming = 1;
1272			}
1273
1274		✗	if (c->lhls && !c->hls_playlist) {
1275		✗	av_log(s, AV_LOG_INFO, "Enabling hls_playlist as LHLS is enabled\n");
1276		✗	c->hls_playlist = 1;
1277			}
1278
1279		✗	if (c->ldash && !c->streaming) {
1280		✗	av_log(s, AV_LOG_WARNING, "Enabling streaming as LDash is enabled\n");
1281		✗	c->streaming = 1;
1282			}
1283
1284		✗	if (c->target_latency && !c->streaming) {
1285		✗	av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as streaming is not enabled\n");
1286		✗	c->target_latency = 0;
1287			}
1288
1289		✗	if (c->global_sidx && !c->single_file) {
1290		✗	av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as single_file is not enabled\n");
1291		✗	c->global_sidx = 0;
1292			}
1293
1294		✗	if (c->global_sidx && c->streaming) {
1295		✗	av_log(s, AV_LOG_WARNING, "Global SIDX option will be ignored as streaming is enabled\n");
1296		✗	c->global_sidx = 0;
1297			}
1298		✗	if (c->frag_type == FRAG_TYPE_NONE && c->streaming) {
1299		✗	av_log(s, AV_LOG_VERBOSE, "Changing frag_type from none to every_frame as streaming is enabled\n");
1300		✗	c->frag_type = FRAG_TYPE_EVERY_FRAME;
1301			}
1302
1303		✗	if (c->write_prft < 0) {
1304		✗	c->write_prft = c->ldash;
1305		✗	if (c->ldash)
1306		✗	av_log(s, AV_LOG_VERBOSE, "Enabling Producer Reference Time element for Low Latency mode\n");
1307			}
1308
1309		✗	if (c->write_prft && !c->utc_timing_url) {
1310		✗	av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as utc_timing_url is not set\n");
1311		✗	c->write_prft = 0;
1312			}
1313
1314		✗	if (c->write_prft && !c->streaming) {
1315		✗	av_log(s, AV_LOG_WARNING, "Producer Reference Time element option will be ignored as streaming is not enabled\n");
1316		✗	c->write_prft = 0;
1317			}
1318
1319		✗	if (c->ldash && !c->write_prft) {
1320		✗	av_log(s, AV_LOG_WARNING, "Low Latency mode enabled without Producer Reference Time element option! Resulting manifest may not be complaint\n");
1321			}
1322
1323		✗	if (c->target_latency && !c->write_prft) {
1324		✗	av_log(s, AV_LOG_WARNING, "Target latency option will be ignored as Producer Reference Time element will not be written\n");
1325		✗	c->target_latency = 0;
1326			}
1327
1328		✗	if (av_cmp_q(c->max_playback_rate, c->min_playback_rate) < 0) {
1329		✗	av_log(s, AV_LOG_WARNING, "Minimum playback rate value is higher than the Maximum. Both will be ignored\n");
1330		✗	c->min_playback_rate = c->max_playback_rate = (AVRational) {1, 1};
1331			}
1332
1333		✗	av_strlcpy(c->dirname, s->url, sizeof(c->dirname));
1334		✗	ptr = strrchr(c->dirname, '/');
1335		✗	if (ptr) {
1336		✗	av_strlcpy(basename, &ptr[1], sizeof(basename));
1337		✗	ptr[1] = '\0';
1338			} else {
1339		✗	c->dirname[0] = '\0';
1340		✗	av_strlcpy(basename, s->url, sizeof(basename));
1341			}
1342
1343		✗	ptr = strrchr(basename, '.');
1344		✗	if (ptr)
1345		✗	*ptr = '\0';
1346
1347		✗	c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams);
1348		✗	if (!c->streams)
1349		✗	return AVERROR(ENOMEM);
1350
1351		✗	if ((ret = parse_adaptation_sets(s)) < 0)
1352		✗	return ret;
1353
1354		✗	if ((ret = init_segment_types(s)) < 0)
1355		✗	return ret;
1356
1357		✗	for (i = 0; i < s->nb_streams; i++) {
1358		✗	OutputStream *os = &c->streams[i];
1359		✗	AdaptationSet *as = &c->as[os->as_idx - 1];
1360			AVFormatContext *ctx;
1361			AVStream *st;
1362		✗	AVDictionary *opts = NULL;
1363			char filename[1024];
1364			AVBPrint buffer;
1365
1366		✗	os->bit_rate = s->streams[i]->codecpar->bit_rate;
1367		✗	if (!os->bit_rate) {
1368		✗	int level = s->strict_std_compliance >= FF_COMPLIANCE_STRICT ?
1369		✗	AV_LOG_ERROR : AV_LOG_WARNING;
1370		✗	av_log(s, level, "No bit rate set for stream %d\n", i);
1371		✗	if (s->strict_std_compliance >= FF_COMPLIANCE_STRICT)
1372		✗	return AVERROR(EINVAL);
1373			}
1374
1375			// copy AdaptationSet language and role from stream metadata
1376		✗	dict_copy_entry(&as->metadata, s->streams[i]->metadata, "language");
1377		✗	dict_copy_entry(&as->metadata, s->streams[i]->metadata, "role");
1378
1379		✗	if (c->init_seg_name) {
1380		✗	os->init_seg_name = av_strireplace(c->init_seg_name, "$ext$", os->extension_name);
1381		✗	if (!os->init_seg_name)
1382		✗	return AVERROR(ENOMEM);
1383			}
1384		✗	if (c->media_seg_name) {
1385		✗	os->media_seg_name = av_strireplace(c->media_seg_name, "$ext$", os->extension_name);
1386		✗	if (!os->media_seg_name)
1387		✗	return AVERROR(ENOMEM);
1388			}
1389		✗	if (c->single_file_name) {
1390		✗	os->single_file_name = av_strireplace(c->single_file_name, "$ext$", os->extension_name);
1391		✗	if (!os->single_file_name)
1392		✗	return AVERROR(ENOMEM);
1393			}
1394
1395		✗	if (os->segment_type == SEGMENT_TYPE_WEBM) {
1396		✗	if ((!c->single_file && !av_match_ext(os->init_seg_name, os->format_name)) ||
1397		✗	(!c->single_file && !av_match_ext(os->media_seg_name, os->format_name)) ||
1398		✗	( c->single_file && !av_match_ext(os->single_file_name, os->format_name))) {
1399		✗	av_log(s, AV_LOG_WARNING,
1400			"One or many segment file names doesn't end with .webm. "
1401			"Override -init_seg_name and/or -media_seg_name and/or "
1402			"-single_file_name to end with the extension .webm\n");
1403			}
1404		✗	if (c->streaming) {
1405			// Streaming not supported as matroskaenc buffers internally before writing the output
1406		✗	av_log(s, AV_LOG_WARNING, "One or more streams in WebM output format. Streaming option will be ignored\n");
1407		✗	c->streaming = 0;
1408			}
1409			}
1410
1411		✗	os->ctx = ctx = avformat_alloc_context();
1412		✗	if (!ctx)
1413		✗	return AVERROR(ENOMEM);
1414
1415		✗	ctx->oformat = av_guess_format(os->format_name, NULL, NULL);
1416		✗	if (!ctx->oformat)
1417		✗	return AVERROR_MUXER_NOT_FOUND;
1418		✗	ctx->interrupt_callback = s->interrupt_callback;
1419		✗	ctx->opaque = s->opaque;
1420		✗	ctx->io_close2 = s->io_close2;
1421		✗	ctx->io_open = s->io_open;
1422		✗	ctx->strict_std_compliance = s->strict_std_compliance;
1423
1424		✗	if (!(st = avformat_new_stream(ctx, NULL)))
1425		✗	return AVERROR(ENOMEM);
1426		✗	avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
1427		✗	st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
1428		✗	st->time_base = s->streams[i]->time_base;
1429		✗	st->avg_frame_rate = s->streams[i]->avg_frame_rate;
1430		✗	ctx->avoid_negative_ts = s->avoid_negative_ts;
1431		✗	ctx->flags = s->flags;
1432
1433		✗	os->parser = av_parser_init(st->codecpar->codec_id);
1434		✗	if (os->parser) {
1435		✗	os->parser_avctx = avcodec_alloc_context3(NULL);
1436		✗	if (!os->parser_avctx)
1437		✗	return AVERROR(ENOMEM);
1438		✗	ret = avcodec_parameters_to_context(os->parser_avctx, st->codecpar);
1439		✗	if (ret < 0)
1440		✗	return ret;
1441			// We only want to parse frame headers
1442		✗	os->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
1443			}
1444
1445		✗	if (c->single_file) {
1446		✗	if (os->single_file_name)
1447		✗	ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->single_file_name, i, 0, os->bit_rate, 0);
1448			else
1449		✗	snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.%s", basename, i, os->format_name);
1450			} else {
1451		✗	ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), os->init_seg_name, i, 0, os->bit_rate, 0);
1452			}
1453		✗	snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
1454		✗	set_http_options(&opts, c);
1455		✗	if (!c->single_file) {
1456		✗	if ((ret = avio_open_dyn_buf(&ctx->pb)) < 0)
1457		✗	return ret;
1458		✗	ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, &opts);
1459			} else {
1460		✗	ctx->url = av_strdup(filename);
1461		✗	ret = avio_open2(&ctx->pb, filename, AVIO_FLAG_WRITE, NULL, &opts);
1462			}
1463		✗	av_dict_free(&opts);
1464		✗	if (ret < 0)
1465		✗	return ret;
1466		✗	os->init_start_pos = 0;
1467
1468		✗	av_dict_copy(&opts, c->format_options, 0);
1469		✗	if (!as->seg_duration)
1470		✗	as->seg_duration = c->seg_duration;
1471		✗	if (!as->frag_duration)
1472		✗	as->frag_duration = c->frag_duration;
1473		✗	if (as->frag_type < 0)
1474		✗	as->frag_type = c->frag_type;
1475		✗	os->seg_duration = as->seg_duration;
1476		✗	os->frag_duration = as->frag_duration;
1477		✗	os->frag_type = as->frag_type;
1478
1479		✗	c->max_segment_duration = FFMAX(c->max_segment_duration, as->seg_duration);
1480
1481		✗	if (c->profile & MPD_PROFILE_DVB && (os->seg_duration > 15000000 || os->seg_duration < 960000)) {
1482		✗	av_log(s, AV_LOG_ERROR, "Segment duration %"PRId64" is outside the allowed range for DVB-DASH profile\n", os->seg_duration);
1483		✗	return AVERROR(EINVAL);
1484			}
1485
1486		✗	if (os->frag_type == FRAG_TYPE_DURATION && !os->frag_duration) {
1487		✗	av_log(s, AV_LOG_WARNING, "frag_type set to duration for stream %d but no frag_duration set\n", i);
1488		✗	os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1489			}
1490		✗	if (os->frag_type == FRAG_TYPE_DURATION && os->frag_duration > os->seg_duration) {
1491		✗	av_log(s, AV_LOG_ERROR, "Fragment duration %"PRId64" is longer than Segment duration %"PRId64"\n", os->frag_duration, os->seg_duration);
1492		✗	return AVERROR(EINVAL);
1493			}
1494		✗	if (os->frag_type == FRAG_TYPE_PFRAMES && (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO || !os->parser)) {
1495		✗	if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && !os->parser)
1496		✗	av_log(s, AV_LOG_WARNING, "frag_type set to P-Frame reordering, but no parser found for stream %d\n", i);
1497		✗	os->frag_type = c->streaming ? FRAG_TYPE_EVERY_FRAME : FRAG_TYPE_NONE;
1498			}
1499		✗	if (os->frag_type != FRAG_TYPE_PFRAMES && as->trick_idx < 0)
1500			// Set this now if a parser isn't used
1501		✗	os->coding_dependency = 1;
1502
1503		✗	if (os->segment_type == SEGMENT_TYPE_MP4) {
1504		✗	if (c->streaming)
1505			// skip_sidx : Reduce bitrate overhead
1506			// skip_trailer : Avoids growing memory usage with time
1507		✗	av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_sidx+skip_trailer", AV_DICT_APPEND);
1508			else {
1509		✗	if (c->global_sidx)
1510		✗	av_dict_set(&opts, "movflags", "+dash+delay_moov+global_sidx+skip_trailer", AV_DICT_APPEND);
1511			else
1512		✗	av_dict_set(&opts, "movflags", "+dash+delay_moov+skip_trailer", AV_DICT_APPEND);
1513			}
1514		✗	if (os->frag_type == FRAG_TYPE_EVERY_FRAME)
1515		✗	av_dict_set(&opts, "movflags", "+frag_every_frame", AV_DICT_APPEND);
1516			else
1517		✗	av_dict_set(&opts, "movflags", "+frag_custom", AV_DICT_APPEND);
1518		✗	if (os->frag_type == FRAG_TYPE_DURATION)
1519		✗	av_dict_set_int(&opts, "frag_duration", os->frag_duration, 0);
1520		✗	if (c->write_prft)
1521		✗	av_dict_set(&opts, "write_prft", "wallclock", 0);
1522			} else {
1523		✗	av_dict_set_int(&opts, "cluster_time_limit", c->seg_duration / 1000, 0);
1524		✗	av_dict_set_int(&opts, "cluster_size_limit", 5 * 1024 * 1024, 0); // set a large cluster size limit
1525		✗	av_dict_set_int(&opts, "dash", 1, 0);
1526		✗	av_dict_set_int(&opts, "dash_track_number", i + 1, 0);
1527		✗	av_dict_set_int(&opts, "live", 1, 0);
1528			}
1529		✗	ret = avformat_init_output(ctx, &opts);
1530		✗	av_dict_free(&opts);
1531		✗	if (ret < 0)
1532		✗	return ret;
1533		✗	os->ctx_inited = 1;
1534		✗	avio_flush(ctx->pb);
1535
1536		✗	av_log(s, AV_LOG_VERBOSE, "Representation %d init segment will be written to: %s\n", i, filename);
1537
1538		✗	s->streams[i]->time_base = st->time_base;
1539			// If the muxer wants to shift timestamps, request to have them shifted
1540			// already before being handed to this muxer, so we don't have mismatches
1541			// between the MPD and the actual segments.
1542		✗	s->avoid_negative_ts = ctx->avoid_negative_ts;
1543		✗	if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1544		✗	AVRational avg_frame_rate = s->streams[i]->avg_frame_rate;
1545			AVRational par;
1546		✗	if (avg_frame_rate.num > 0) {
1547		✗	if (av_cmp_q(avg_frame_rate, as->min_frame_rate) < 0)
1548		✗	as->min_frame_rate = avg_frame_rate;
1549		✗	if (av_cmp_q(as->max_frame_rate, avg_frame_rate) < 0)
1550		✗	as->max_frame_rate = avg_frame_rate;
1551			} else {
1552		✗	as->ambiguous_frame_rate = 1;
1553			}
1554
1555		✗	if (st->codecpar->width > as->max_width)
1556		✗	as->max_width = st->codecpar->width;
1557		✗	if (st->codecpar->height > as->max_height)
1558		✗	as->max_height = st->codecpar->height;
1559
1560		✗	if (st->sample_aspect_ratio.num)
1561		✗	os->sar = st->sample_aspect_ratio;
1562			else
1563		✗	os->sar = (AVRational){1,1};
1564		✗	av_reduce(&par.num, &par.den,
1565		✗	st->codecpar->width * (int64_t)os->sar.num,
1566		✗	st->codecpar->height * (int64_t)os->sar.den,
1567			1024 * 1024);
1568
1569		✗	if (as->par.num && av_cmp_q(par, as->par)) {
1570		✗	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);
1571		✗	return AVERROR(EINVAL);
1572			}
1573		✗	as->par = par;
1574
1575		✗	c->has_video = 1;
1576			}
1577
1578		✗	av_bprint_init_for_buffer(&buffer, os->codec_str, sizeof(os->codec_str));
1579		✗	ff_make_codec_str(s, st->codecpar, &st->avg_frame_rate, &buffer);
1580		✗	os->first_pts = AV_NOPTS_VALUE;
1581		✗	os->max_pts = AV_NOPTS_VALUE;
1582		✗	os->last_dts = AV_NOPTS_VALUE;
1583		✗	os->segment_index = 1;
1584
1585		✗	if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1586		✗	c->nr_of_streams_to_flush++;
1587			}
1588
1589		✗	if (!c->has_video && c->seg_duration <= 0) {
1590		✗	av_log(s, AV_LOG_WARNING, "no video stream and no seg duration set\n");
1591		✗	return AVERROR(EINVAL);
1592			}
1593		✗	if (!c->has_video && c->frag_type == FRAG_TYPE_PFRAMES)
1594		✗	av_log(s, AV_LOG_WARNING, "no video stream and P-frame fragmentation set\n");
1595
1596		✗	c->nr_of_streams_flushed = 0;
1597		✗	c->target_latency_refid = -1;
1598
1599		✗	return 0;
1600			}
1601
1602		✗	static int dash_write_header(AVFormatContext *s)
1603			{
1604		✗	DASHContext *c = s->priv_data;
1605			int i, ret;
1606		✗	for (i = 0; i < s->nb_streams; i++) {
1607		✗	OutputStream *os = &c->streams[i];
1608		✗	if ((ret = avformat_write_header(os->ctx, NULL)) < 0)
1609		✗	return ret;
1610
1611			// Flush init segment
1612			// Only for WebM segment, since for mp4 delay_moov is set and
1613			// the init segment is thus flushed after the first packets.
1614		✗	if (os->segment_type == SEGMENT_TYPE_WEBM &&
1615		✗	(ret = flush_init_segment(s, os)) < 0)
1616		✗	return ret;
1617			}
1618		✗	return 0;
1619			}
1620
1621		✗	static int add_segment(OutputStream *os, const char *file,
1622			int64_t time, int64_t duration,
1623			int64_t start_pos, int64_t range_length,
1624			int64_t index_length, int next_exp_index)
1625			{
1626			int err;
1627			Segment *seg;
1628		✗	if (os->nb_segments >= os->segments_size) {
1629		✗	os->segments_size = (os->segments_size + 1) * 2;
1630		✗	if ((err = av_reallocp_array(&os->segments, sizeof(*os->segments),
1631		✗	os->segments_size)) < 0) {
1632		✗	os->segments_size = 0;
1633		✗	os->nb_segments = 0;
1634		✗	return err;
1635			}
1636			}
1637		✗	seg = av_mallocz(sizeof(*seg));
1638		✗	if (!seg)
1639		✗	return AVERROR(ENOMEM);
1640		✗	av_strlcpy(seg->file, file, sizeof(seg->file));
1641		✗	seg->time = time;
1642		✗	seg->duration = duration;
1643		✗	if (seg->time < 0) { // If pts<0, it is expected to be cut away with an edit list
1644		✗	seg->duration += seg->time;
1645		✗	seg->time = 0;
1646			}
1647		✗	seg->start_pos = start_pos;
1648		✗	seg->range_length = range_length;
1649		✗	seg->index_length = index_length;
1650		✗	os->segments[os->nb_segments++] = seg;
1651		✗	os->segment_index++;
1652			//correcting the segment index if it has fallen behind the expected value
1653		✗	if (os->segment_index < next_exp_index) {
1654		✗	av_log(NULL, AV_LOG_WARNING, "Correcting the segment index after file %s: current=%d corrected=%d\n",
1655			file, os->segment_index, next_exp_index);
1656		✗	os->segment_index = next_exp_index;
1657			}
1658		✗	return 0;
1659			}
1660
1661		✗	static void write_styp(AVIOContext *pb)
1662			{
1663		✗	avio_wb32(pb, 24);
1664		✗	ffio_wfourcc(pb, "styp");
1665		✗	ffio_wfourcc(pb, "msdh");
1666		✗	avio_wb32(pb, 0); /* minor */
1667		✗	ffio_wfourcc(pb, "msdh");
1668		✗	ffio_wfourcc(pb, "msix");
1669		✗	}
1670
1671		✗	static void find_index_range(AVFormatContext *s, const char *full_path,
1672			int64_t pos, int *index_length)
1673			{
1674			uint8_t buf[8];
1675			AVIOContext *pb;
1676			int ret;
1677
1678		✗	ret = s->io_open(s, &pb, full_path, AVIO_FLAG_READ, NULL);
1679		✗	if (ret < 0)
1680		✗	return;
1681		✗	if (avio_seek(pb, pos, SEEK_SET) != pos) {
1682		✗	ff_format_io_close(s, &pb);
1683		✗	return;
1684			}
1685		✗	ret = avio_read(pb, buf, 8);
1686		✗	ff_format_io_close(s, &pb);
1687		✗	if (ret < 8)
1688		✗	return;
1689		✗	if (AV_RL32(&buf[4]) != MKTAG('s', 'i', 'd', 'x'))
1690		✗	return;
1691		✗	*index_length = AV_RB32(&buf[0]);
1692			}
1693
1694		✗	static int update_stream_extradata(AVFormatContext *s, OutputStream *os,
1695			AVPacket *pkt, AVRational *frame_rate)
1696			{
1697		✗	AVCodecParameters *par = os->ctx->streams[0]->codecpar;
1698			uint8_t *extradata;
1699			size_t extradata_size;
1700			int ret;
1701			AVBPrint buffer;
1702
1703		✗	if (par->extradata_size)
1704		✗	return 0;
1705
1706		✗	extradata = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &extradata_size);
1707		✗	if (!extradata_size)
1708		✗	return 0;
1709
1710		✗	ret = ff_alloc_extradata(par, extradata_size);
1711		✗	if (ret < 0)
1712		✗	return ret;
1713
1714		✗	memcpy(par->extradata, extradata, extradata_size);
1715
1716		✗	av_bprint_init_for_buffer(&buffer, os->codec_str, sizeof(os->codec_str));
1717		✗	ff_make_codec_str(s, par, frame_rate, &buffer);
1718
1719		✗	return 0;
1720			}
1721
1722		✗	static void dashenc_delete_file(AVFormatContext *s, char *filename) {
1723		✗	DASHContext *c = s->priv_data;
1724		✗	int http_base_proto = ff_is_http_proto(filename);
1725
1726		✗	if (http_base_proto) {
1727		✗	AVDictionary *http_opts = NULL;
1728
1729		✗	set_http_options(&http_opts, c);
1730		✗	av_dict_set(&http_opts, "method", "DELETE", 0);
1731
1732		✗	if (dashenc_io_open(s, &c->http_delete, filename, &http_opts) < 0) {
1733		✗	av_log(s, AV_LOG_ERROR, "failed to delete %s\n", filename);
1734			}
1735		✗	av_dict_free(&http_opts);
1736
1737			//Nothing to write
1738		✗	dashenc_io_close(s, &c->http_delete, filename);
1739			} else {
1740		✗	int res = ffurl_delete(filename);
1741		✗	if (res < 0) {
1742		✗	av_log(s, (res == AVERROR(ENOENT) ? AV_LOG_WARNING : AV_LOG_ERROR),
1743		✗	"failed to delete %s: %s\n", filename, av_err2str(res));
1744			}
1745			}
1746		✗	}
1747
1748		✗	static int dashenc_delete_segment_file(AVFormatContext *s, const char* file)
1749			{
1750		✗	DASHContext *c = s->priv_data;
1751			AVBPrint buf;
1752
1753		✗	av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
1754
1755		✗	av_bprintf(&buf, "%s%s", c->dirname, file);
1756		✗	if (!av_bprint_is_complete(&buf)) {
1757		✗	av_bprint_finalize(&buf, NULL);
1758		✗	av_log(s, AV_LOG_WARNING, "Out of memory for filename\n");
1759		✗	return AVERROR(ENOMEM);
1760			}
1761
1762		✗	dashenc_delete_file(s, buf.str);
1763
1764		✗	av_bprint_finalize(&buf, NULL);
1765		✗	return 0;
1766			}
1767
1768		✗	static inline void dashenc_delete_media_segments(AVFormatContext *s, OutputStream *os, int remove_count)
1769			{
1770		✗	for (int i = 0; i < remove_count; ++i) {
1771		✗	dashenc_delete_segment_file(s, os->segments[i]->file);
1772
1773			// Delete the segment regardless of whether the file was successfully deleted
1774		✗	av_free(os->segments[i]);
1775			}
1776
1777		✗	os->nb_segments -= remove_count;
1778		✗	memmove(os->segments, os->segments + remove_count, os->nb_segments * sizeof(*os->segments));
1779		✗	}
1780
1781		✗	static int dash_flush(AVFormatContext *s, int final, int stream)
1782			{
1783		✗	DASHContext *c = s->priv_data;
1784		✗	int i, ret = 0;
1785
1786		✗	const char *proto = avio_find_protocol_name(s->url);
1787		✗	int use_rename = proto && !strcmp(proto, "file");
1788
1789		✗	int cur_flush_segment_index = 0, next_exp_index = -1;
1790		✗	if (stream >= 0) {
1791		✗	cur_flush_segment_index = c->streams[stream].segment_index;
1792
1793			//finding the next segment's expected index, based on the current pts value
1794		✗	if (c->use_template && !c->use_timeline && c->index_correction &&
1795		✗	c->streams[stream].last_pts != AV_NOPTS_VALUE &&
1796		✗	c->streams[stream].first_pts != AV_NOPTS_VALUE) {
1797		✗	int64_t pts_diff = av_rescale_q(c->streams[stream].last_pts -
1798		✗	c->streams[stream].first_pts,
1799		✗	s->streams[stream]->time_base,
1800		✗	AV_TIME_BASE_Q);
1801		✗	next_exp_index = (pts_diff / c->streams[stream].seg_duration) + 1;
1802			}
1803			}
1804
1805		✗	for (i = 0; i < s->nb_streams; i++) {
1806		✗	OutputStream *os = &c->streams[i];
1807		✗	AVStream *st = s->streams[i];
1808		✗	int range_length, index_length = 0;
1809			int64_t duration;
1810
1811		✗	if (!os->packets_written)
1812		✗	continue;
1813
1814			// Flush the single stream that got a keyframe right now.
1815			// Flush all audio streams as well, in sync with video keyframes,
1816			// but not the other video streams.
1817		✗	if (stream >= 0 && i != stream) {
1818		✗	if (s->streams[stream]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
1819		✗	s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1820		✗	continue;
1821		✗	if (s->streams[i]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
1822		✗	continue;
1823			// Make sure we don't flush audio streams multiple times, when
1824			// all video streams are flushed one at a time.
1825		✗	if (c->has_video && os->segment_index > cur_flush_segment_index)
1826		✗	continue;
1827			}
1828
1829		✗	if (c->single_file)
1830		✗	snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname, os->initfile);
1831
1832		✗	ret = flush_dynbuf(c, os, &range_length);
1833		✗	if (ret < 0)
1834		✗	break;
1835		✗	os->packets_written = 0;
1836
1837		✗	if (c->single_file) {
1838		✗	find_index_range(s, os->full_path, os->pos, &index_length);
1839			} else {
1840		✗	dashenc_io_close(s, &os->out, os->temp_path);
1841
1842		✗	if (use_rename) {
1843		✗	ret = ff_rename(os->temp_path, os->full_path, os->ctx);
1844		✗	if (ret < 0)
1845		✗	break;
1846			}
1847			}
1848
1849		✗	duration = av_rescale_q(os->max_pts - os->start_pts, st->time_base, AV_TIME_BASE_Q);
1850		✗	os->last_duration = FFMAX(os->last_duration, duration);
1851
1852		✗	if (!os->muxer_overhead && os->max_pts > os->start_pts)
1853		✗	os->muxer_overhead = ((int64_t) (range_length - os->total_pkt_size) *
1854		✗	8 * AV_TIME_BASE) / duration;
1855		✗	os->total_pkt_size = 0;
1856		✗	os->total_pkt_duration = 0;
1857
1858		✗	if (!os->bit_rate && !os->first_segment_bit_rate) {
1859		✗	os->first_segment_bit_rate = (int64_t) range_length * 8 * AV_TIME_BASE / duration;
1860			}
1861		✗	add_segment(os, os->filename, os->start_pts, os->max_pts - os->start_pts, os->pos, range_length, index_length, next_exp_index);
1862		✗	av_log(s, AV_LOG_VERBOSE, "Representation %d media segment %d written to: %s\n", i, os->segment_index, os->full_path);
1863
1864		✗	os->pos += range_length;
1865			}
1866
1867		✗	if (c->window_size) {
1868		✗	for (i = 0; i < s->nb_streams; i++) {
1869		✗	OutputStream *os = &c->streams[i];
1870		✗	int remove_count = os->nb_segments - c->window_size - c->extra_window_size;
1871		✗	if (remove_count > 0)
1872		✗	dashenc_delete_media_segments(s, os, remove_count);
1873			}
1874			}
1875
1876		✗	if (final) {
1877		✗	for (i = 0; i < s->nb_streams; i++) {
1878		✗	OutputStream *os = &c->streams[i];
1879		✗	if (os->ctx && os->ctx_inited) {
1880		✗	int64_t file_size = avio_tell(os->ctx->pb);
1881		✗	av_write_trailer(os->ctx);
1882		✗	if (c->global_sidx) {
1883			int j, start_index, start_number;
1884		✗	int64_t sidx_size = avio_tell(os->ctx->pb) - file_size;
1885		✗	get_start_index_number(os, c, &start_index, &start_number);
1886		✗	if (start_index >= os->nb_segments ||
1887		✗	os->segment_type != SEGMENT_TYPE_MP4)
1888		✗	continue;
1889		✗	os->init_range_length += sidx_size;
1890		✗	for (j = start_index; j < os->nb_segments; j++) {
1891		✗	Segment *seg = os->segments[j];
1892		✗	seg->start_pos += sidx_size;
1893			}
1894			}
1895
1896			}
1897			}
1898			}
1899		✗	if (ret >= 0) {
1900		✗	if (c->has_video && !final) {
1901		✗	c->nr_of_streams_flushed++;
1902		✗	if (c->nr_of_streams_flushed != c->nr_of_streams_to_flush)
1903		✗	return ret;
1904
1905		✗	c->nr_of_streams_flushed = 0;
1906			}
1907			// In streaming mode the manifest is written at the beginning
1908			// of the segment instead
1909		✗	if (!c->streaming || final)
1910		✗	ret = write_manifest(s, final);
1911			}
1912		✗	return ret;
1913			}
1914
1915		✗	static int dash_parse_prft(DASHContext *c, AVPacket *pkt)
1916			{
1917		✗	OutputStream *os = &c->streams[pkt->stream_index];
1918			AVProducerReferenceTime *prft;
1919			size_t side_data_size;
1920
1921		✗	prft = (AVProducerReferenceTime *)av_packet_get_side_data(pkt, AV_PKT_DATA_PRFT, &side_data_size);
1922		✗	if (!prft || side_data_size != sizeof(AVProducerReferenceTime) || (prft->flags && prft->flags != 24)) {
1923			// No encoder generated or user provided capture time AVProducerReferenceTime side data. Instead
1924			// of letting the mov muxer generate one, do it here so we can also use it for the manifest.
1925		✗	prft = (AVProducerReferenceTime *)av_packet_new_side_data(pkt, AV_PKT_DATA_PRFT,
1926			sizeof(AVProducerReferenceTime));
1927		✗	if (!prft)
1928		✗	return AVERROR(ENOMEM);
1929		✗	prft->wallclock = av_gettime();
1930		✗	prft->flags = 24;
1931			}
1932		✗	if (os->first_pts == AV_NOPTS_VALUE) {
1933		✗	os->producer_reference_time = *prft;
1934		✗	if (c->target_latency_refid < 0)
1935		✗	c->target_latency_refid = pkt->stream_index;
1936			}
1937
1938		✗	return 0;
1939			}
1940
1941		✗	static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
1942			{
1943		✗	DASHContext *c = s->priv_data;
1944		✗	AVStream *st = s->streams[pkt->stream_index];
1945		✗	OutputStream *os = &c->streams[pkt->stream_index];
1946		✗	AdaptationSet *as = &c->as[os->as_idx - 1];
1947			int64_t seg_end_duration, elapsed_duration;
1948			int ret;
1949
1950		✗	ret = update_stream_extradata(s, os, pkt, &st->avg_frame_rate);
1951		✗	if (ret < 0)
1952		✗	return ret;
1953
1954			// Fill in a heuristic guess of the packet duration, if none is available.
1955			// The mp4 muxer will do something similar (for the last packet in a fragment)
1956			// if nothing is set (setting it for the other packets doesn't hurt).
1957			// By setting a nonzero duration here, we can be sure that the mp4 muxer won't
1958			// invoke its heuristic (this doesn't have to be identical to that algorithm),
1959			// so that we know the exact timestamps of fragments.
1960		✗	if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
1961		✗	pkt->duration = pkt->dts - os->last_dts;
1962		✗	os->last_dts = pkt->dts;
1963
1964			// If forcing the stream to start at 0, the mp4 muxer will set the start
1965			// timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
1966		✗	if (os->first_pts == AV_NOPTS_VALUE &&
1967		✗	s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO) {
1968		✗	pkt->pts -= pkt->dts;
1969		✗	pkt->dts = 0;
1970			}
1971
1972		✗	if (c->write_prft) {
1973		✗	ret = dash_parse_prft(c, pkt);
1974		✗	if (ret < 0)
1975		✗	return ret;
1976			}
1977
1978		✗	if (os->first_pts == AV_NOPTS_VALUE) {
1979		✗	os->first_pts = pkt->pts;
1980			}
1981		✗	os->last_pts = pkt->pts;
1982
1983		✗	if (!c->availability_start_time[0]) {
1984		✗	int64_t start_time_us = av_gettime();
1985		✗	c->start_time_s = start_time_us / 1000000;
1986		✗	format_date(c->availability_start_time,
1987			sizeof(c->availability_start_time), start_time_us);
1988			}
1989
1990		✗	if (!os->packets_written)
1991		✗	os->availability_time_offset = 0;
1992
1993		✗	if (!os->availability_time_offset &&
1994		✗	((os->frag_type == FRAG_TYPE_DURATION && os->seg_duration != os->frag_duration) ||
1995		✗	(os->frag_type == FRAG_TYPE_EVERY_FRAME && pkt->duration))) {
1996		✗	AdaptationSet *as = &c->as[os->as_idx - 1];
1997		✗	int64_t frame_duration = 0;
1998
1999		✗	switch (os->frag_type) {
2000		✗	case FRAG_TYPE_DURATION:
2001		✗	frame_duration = os->frag_duration;
2002		✗	break;
2003		✗	case FRAG_TYPE_EVERY_FRAME:
2004		✗	frame_duration = av_rescale_q(pkt->duration, st->time_base, AV_TIME_BASE_Q);
2005		✗	break;
2006			}
2007
2008		✗	os->availability_time_offset = ((double) os->seg_duration -
2009		✗	frame_duration) / AV_TIME_BASE;
2010		✗	as->max_frag_duration = FFMAX(frame_duration, as->max_frag_duration);
2011			}
2012
2013		✗	if (c->use_template && !c->use_timeline) {
2014		✗	elapsed_duration = pkt->pts - os->first_pts;
2015		✗	seg_end_duration = (int64_t) os->segment_index * os->seg_duration;
2016			} else {
2017		✗	elapsed_duration = pkt->pts - os->start_pts;
2018		✗	seg_end_duration = os->seg_duration;
2019			}
2020
2021		✗	if (os->parser &&
2022		✗	(os->frag_type == FRAG_TYPE_PFRAMES ||
2023		✗	as->trick_idx >= 0)) {
2024			// Parse the packets only in scenarios where it's needed
2025			uint8_t *data;
2026			int size;
2027		✗	av_parser_parse2(os->parser, os->parser_avctx,
2028		✗	&data, &size, pkt->data, pkt->size,
2029			pkt->pts, pkt->dts, pkt->pos);
2030
2031		✗	os->coding_dependency |= os->parser->pict_type != AV_PICTURE_TYPE_I;
2032			}
2033
2034		✗	if (pkt->flags & AV_PKT_FLAG_KEY && os->packets_written &&
2035		✗	av_compare_ts(elapsed_duration, st->time_base,
2036		✗	seg_end_duration, AV_TIME_BASE_Q) >= 0) {
2037		✗	if (!c->has_video || st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2038		✗	c->last_duration = av_rescale_q(pkt->pts - os->start_pts,
2039			st->time_base,
2040		✗	AV_TIME_BASE_Q);
2041		✗	c->total_duration = av_rescale_q(pkt->pts - os->first_pts,
2042			st->time_base,
2043		✗	AV_TIME_BASE_Q);
2044
2045		✗	if ((!c->use_timeline || !c->use_template) && os->last_duration) {
2046		✗	if (c->last_duration < os->last_duration*9/10 ||
2047		✗	c->last_duration > os->last_duration*11/10) {
2048		✗	av_log(s, AV_LOG_WARNING,
2049			"Segment durations differ too much, enable use_timeline "
2050			"and use_template, or keep a stricter keyframe interval\n");
2051			}
2052			}
2053			}
2054
2055		✗	if (c->write_prft && os->producer_reference_time.wallclock && !os->producer_reference_time_str[0])
2056		✗	format_date(os->producer_reference_time_str,
2057			sizeof(os->producer_reference_time_str),
2058			os->producer_reference_time.wallclock);
2059
2060		✗	if ((ret = dash_flush(s, 0, pkt->stream_index)) < 0)
2061		✗	return ret;
2062			}
2063
2064		✗	if (!os->packets_written) {
2065			// If we wrote a previous segment, adjust the start time of the segment
2066			// to the end of the previous one (which is the same as the mp4 muxer
2067			// does). This avoids gaps in the timeline.
2068		✗	if (os->max_pts != AV_NOPTS_VALUE)
2069		✗	os->start_pts = os->max_pts;
2070			else
2071		✗	os->start_pts = pkt->pts;
2072			}
2073		✗	if (os->max_pts == AV_NOPTS_VALUE)
2074		✗	os->max_pts = pkt->pts + pkt->duration;
2075			else
2076		✗	os->max_pts = FFMAX(os->max_pts, pkt->pts + pkt->duration);
2077
2078		✗	if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
2079		✗	os->frag_type == FRAG_TYPE_PFRAMES &&
2080		✗	os->packets_written) {
2081		✗	av_assert0(os->parser);
2082		✗	if ((os->parser->pict_type == AV_PICTURE_TYPE_P &&
2083		✗	st->codecpar->video_delay &&
2084		✗	!(os->last_flags & AV_PKT_FLAG_KEY)) ||
2085		✗	pkt->flags & AV_PKT_FLAG_KEY) {
2086		✗	ret = av_write_frame(os->ctx, NULL);
2087		✗	if (ret < 0)
2088		✗	return ret;
2089
2090		✗	if (!os->availability_time_offset) {
2091		✗	int64_t frag_duration = av_rescale_q(os->total_pkt_duration, st->time_base,
2092		✗	AV_TIME_BASE_Q);
2093		✗	os->availability_time_offset = ((double) os->seg_duration -
2094		✗	frag_duration) / AV_TIME_BASE;
2095		✗	as->max_frag_duration = FFMAX(frag_duration, as->max_frag_duration);
2096			}
2097			}
2098			}
2099
2100		✗	if (pkt->flags & AV_PKT_FLAG_KEY && (os->packets_written || os->nb_segments) && !os->gop_size && as->trick_idx < 0) {
2101		✗	os->gop_size = os->last_duration + av_rescale_q(os->total_pkt_duration, st->time_base, AV_TIME_BASE_Q);
2102		✗	c->max_gop_size = FFMAX(c->max_gop_size, os->gop_size);
2103			}
2104
2105		✗	if ((ret = ff_write_chained(os->ctx, 0, pkt, s, 0)) < 0)
2106		✗	return ret;
2107
2108		✗	os->packets_written++;
2109		✗	os->total_pkt_size += pkt->size;
2110		✗	os->total_pkt_duration += pkt->duration;
2111		✗	os->last_flags = pkt->flags;
2112
2113		✗	if (!os->init_range_length)
2114		✗	flush_init_segment(s, os);
2115
2116			//open the output context when the first frame of a segment is ready
2117		✗	if (!c->single_file && os->packets_written == 1) {
2118		✗	AVDictionary *opts = NULL;
2119		✗	const char *proto = avio_find_protocol_name(s->url);
2120		✗	int use_rename = proto && !strcmp(proto, "file");
2121		✗	if (os->segment_type == SEGMENT_TYPE_MP4)
2122		✗	write_styp(os->ctx->pb);
2123		✗	os->filename[0] = os->full_path[0] = os->temp_path[0] = '\0';
2124		✗	ff_dash_fill_tmpl_params(os->filename, sizeof(os->filename),
2125			os->media_seg_name, pkt->stream_index,
2126			os->segment_index, os->bit_rate, os->start_pts);
2127		✗	snprintf(os->full_path, sizeof(os->full_path), "%s%s", c->dirname,
2128		✗	os->filename);
2129		✗	snprintf(os->temp_path, sizeof(os->temp_path),
2130		✗	use_rename ? "%s.tmp" : "%s", os->full_path);
2131		✗	set_http_options(&opts, c);
2132		✗	ret = dashenc_io_open(s, &os->out, os->temp_path, &opts);
2133		✗	av_dict_free(&opts);
2134		✗	if (ret < 0) {
2135		✗	return handle_io_open_error(s, ret, os->temp_path);
2136			}
2137
2138			// in streaming mode, the segments are available for playing
2139			// before fully written but the manifest is needed so that
2140			// clients and discover the segment filenames.
2141		✗	if (c->streaming) {
2142		✗	write_manifest(s, 0);
2143			}
2144
2145		✗	if (c->lhls) {
2146		✗	char *prefetch_url = use_rename ? NULL : os->filename;
2147		✗	write_hls_media_playlist(os, s, pkt->stream_index, 0, prefetch_url);
2148			}
2149			}
2150
2151			//write out the data immediately in streaming mode
2152		✗	if (c->streaming && os->segment_type == SEGMENT_TYPE_MP4) {
2153		✗	int len = 0;
2154		✗	uint8_t *buf = NULL;
2155		✗	avio_flush(os->ctx->pb);
2156		✗	len = avio_get_dyn_buf (os->ctx->pb, &buf);
2157		✗	if (os->out) {
2158		✗	avio_write(os->out, buf + os->written_len, len - os->written_len);
2159		✗	avio_flush(os->out);
2160			}
2161		✗	os->written_len = len;
2162			}
2163
2164		✗	return ret;
2165			}
2166
2167		✗	static int dash_write_trailer(AVFormatContext *s)
2168			{
2169		✗	DASHContext *c = s->priv_data;
2170			int i;
2171
2172		✗	if (s->nb_streams > 0) {
2173		✗	OutputStream *os = &c->streams[0];
2174			// If no segments have been written so far, try to do a crude
2175			// guess of the segment duration
2176		✗	if (!c->last_duration)
2177		✗	c->last_duration = av_rescale_q(os->max_pts - os->start_pts,
2178		✗	s->streams[0]->time_base,
2179		✗	AV_TIME_BASE_Q);
2180		✗	c->total_duration = av_rescale_q(os->max_pts - os->first_pts,
2181		✗	s->streams[0]->time_base,
2182		✗	AV_TIME_BASE_Q);
2183			}
2184		✗	dash_flush(s, 1, -1);
2185
2186		✗	if (c->remove_at_exit) {
2187		✗	for (i = 0; i < s->nb_streams; ++i) {
2188		✗	OutputStream *os = &c->streams[i];
2189		✗	dashenc_delete_media_segments(s, os, os->nb_segments);
2190		✗	dashenc_delete_segment_file(s, os->initfile);
2191		✗	if (c->hls_playlist && os->segment_type == SEGMENT_TYPE_MP4) {
2192			char filename[1024];
2193		✗	get_hls_playlist_name(filename, sizeof(filename), c->dirname, i);
2194		✗	dashenc_delete_file(s, filename);
2195			}
2196			}
2197		✗	dashenc_delete_file(s, s->url);
2198
2199		✗	if (c->hls_playlist && c->master_playlist_created) {
2200			char filename[1024];
2201		✗	snprintf(filename, sizeof(filename), "%s%s", c->dirname, c->hls_master_name);
2202		✗	dashenc_delete_file(s, filename);
2203			}
2204			}
2205
2206		✗	return 0;
2207			}
2208
2209		✗	static int dash_check_bitstream(AVFormatContext *s, AVStream *st,
2210			const AVPacket *avpkt)
2211			{
2212		✗	DASHContext *c = s->priv_data;
2213		✗	OutputStream *os = &c->streams[st->index];
2214		✗	AVFormatContext *oc = os->ctx;
2215		✗	if (ffofmt(oc->oformat)->check_bitstream) {
2216		✗	AVStream *const ost = oc->streams[0];
2217			int ret;
2218		✗	ret = ffofmt(oc->oformat)->check_bitstream(oc, ost, avpkt);
2219		✗	if (ret == 1) {
2220		✗	FFStream *const sti = ffstream(st);
2221		✗	FFStream *const osti = ffstream(ost);
2222		✗	sti->bsfc = osti->bsfc;
2223		✗	osti->bsfc = NULL;
2224			}
2225		✗	return ret;
2226			}
2227		✗	return 1;
2228			}
2229
2230			#define OFFSET(x) offsetof(DASHContext, x)
2231			#define E AV_OPT_FLAG_ENCODING_PARAM
2232			static const AVOption options[] = {
2233			{ "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 },
2234			{ "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, .unit = "segment_type"},
2235			{ "auto", "select segment file format based on codec", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_AUTO }, 0, UINT_MAX, E, .unit = "segment_type"},
2236			{ "mp4", "make segment file in ISOBMFF format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MP4 }, 0, UINT_MAX, E, .unit = "segment_type"},
2237			{ "webm", "make segment file in WebM format", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_WEBM }, 0, UINT_MAX, E, .unit = "segment_type"},
2238			{ "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 },
2239			{ "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},
2240			{ "frag_duration", "fragment duration (in seconds, fractional value can be set)", OFFSET(frag_duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2241			{ "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, .unit = "frag_type"},
2242			{ "none", "one fragment per segment", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_NONE }, 0, UINT_MAX, E, .unit = "frag_type"},
2243			{ "every_frame", "fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_EVERY_FRAME }, 0, UINT_MAX, E, .unit = "frag_type"},
2244			{ "duration", "fragment at specific time intervals", 0, AV_OPT_TYPE_CONST, {.i64 = FRAG_TYPE_DURATION }, 0, UINT_MAX, E, .unit = "frag_type"},
2245			{ "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, .unit = "frag_type"},
2246			{ "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 },
2247			{ "hls_master_name", "HLS master playlist name", OFFSET(hls_master_name), AV_OPT_TYPE_STRING, {.str = "master.m3u8"}, 0, 0, E },
2248			{ "hls_playlist", "Generate HLS playlist files(master.m3u8, media_%d.m3u8)", OFFSET(hls_playlist), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2249			{ "http_opts", "HTTP protocol options", OFFSET(http_opts), AV_OPT_TYPE_DICT, { .str = NULL }, 0, 0, E },
2250			{ "http_persistent", "Use persistent HTTP connections", OFFSET(http_persistent), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
2251			{ "http_user_agent", "override User-Agent field in HTTP header", OFFSET(user_agent), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
2252			{ "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 },
2253			{ "index_correction", "Enable/Disable segment index correction logic", OFFSET(index_correction), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2254			{ "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 },
2255			{ "ldash", "Enable Low-latency dash. Constrains the value of a few elements", OFFSET(ldash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2256			{ "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 },
2257			{ "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},
2258			{ "max_playback_rate", "Set desired maximum playback rate", OFFSET(max_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2259			{ "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 },
2260			{ "method", "set the HTTP method", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E },
2261			{ "min_playback_rate", "Set desired minimum playback rate", OFFSET(min_playback_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 1.0 }, 0.5, 1.5, E },
2262			{ "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, .unit = "mpd_profile"},
2263			{ "dash", "MPEG-DASH ISO Base media file format live profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DASH }, 0, UINT_MAX, E, .unit = "mpd_profile"},
2264			{ "dvb_dash", "DVB-DASH profile", 0, AV_OPT_TYPE_CONST, {.i64 = MPD_PROFILE_DVB }, 0, UINT_MAX, E, .unit = "mpd_profile"},
2265			{ "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2266			{ "seg_duration", "segment duration (in seconds, fractional value can be set)", OFFSET(seg_duration), AV_OPT_TYPE_DURATION, { .i64 = 5000000 }, 0, INT_MAX, E },
2267			{ "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2268			{ "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 },
2269			{ "streaming", "Enable/Disable streaming mode of output. Each frame will be moof fragment", OFFSET(streaming), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
2270			{ "target_latency", "Set desired target latency for Low-latency dash", OFFSET(target_latency), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT_MAX, E },
2271			{ "timeout", "set timeout for socket I/O operations", OFFSET(timeout), AV_OPT_TYPE_DURATION, { .i64 = -1 }, -1, INT_MAX, .flags = E },
2272			{ "update_period", "Set the mpd update interval", OFFSET(update_period), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
2273			{ "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2274			{ "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
2275			{ "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 },
2276			{ "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
2277			{ "write_prft", "Write producer reference time element", OFFSET(write_prft), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, E},
2278			{ NULL },
2279			};
2280
2281			static const AVClass dash_class = {
2282			.class_name = "dash muxer",
2283			.item_name = av_default_item_name,
2284			.option = options,
2285			.version = LIBAVUTIL_VERSION_INT,
2286			};
2287
2288			const FFOutputFormat ff_dash_muxer = {
2289			.p.name = "dash",
2290			.p.long_name = NULL_IF_CONFIG_SMALL("DASH Muxer"),
2291			.p.extensions = "mpd",
2292			.p.audio_codec = AV_CODEC_ID_AAC,
2293			.p.video_codec = AV_CODEC_ID_H264,
2294			.p.flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
2295			.p.priv_class = &dash_class,
2296			.priv_data_size = sizeof(DASHContext),
2297			.init = dash_init,
2298			.write_header = dash_write_header,
2299			.write_packet = dash_write_packet,
2300			.write_trailer = dash_write_trailer,
2301			.deinit = dash_free,
2302			.check_bitstream = dash_check_bitstream,
2303			};
2304