path: root/libavformat/mpegts.c (plain)
blob: c10e3f256bac811ab4cef9169f258ec3b96fafcf

1	/*
2	* MPEG-2 transport stream (aka DVB) demuxer
3	* Copyright (c) 2002-2003 Fabrice Bellard
4	*
5	* This file is part of FFmpeg.
6	*
7	* FFmpeg is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU Lesser General Public
9	* License as published by the Free Software Foundation; either
10	* version 2.1 of the License, or (at your option) any later version.
11	*
12	* FFmpeg is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* Lesser General Public License for more details.
16	*
17	* You should have received a copy of the GNU Lesser General Public
18	* License along with FFmpeg; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20	*/
21
22	#include "libavutil/buffer.h"
23	#include "libavutil/crc.h"
24	#include "libavutil/internal.h"
25	#include "libavutil/intreadwrite.h"
26	#include "libavutil/log.h"
27	#include "libavutil/dict.h"
28	#include "libavutil/mathematics.h"
29	#include "libavutil/opt.h"
30	#include "libavutil/avassert.h"
31	#include "libavcodec/bytestream.h"
32	#include "libavcodec/get_bits.h"
33	#include "libavcodec/opus.h"
34	#include "avformat.h"
35	#include "mpegts.h"
36	#include "internal.h"
37	#include "avio_internal.h"
38	#include "mpeg.h"
39	#include "isom.h"
40
41	/* maximum size in which we look for synchronization if
42	* synchronization is lost */
43	#define MAX_RESYNC_SIZE 65536
44
45	#define MAX_PES_PAYLOAD 200 * 1024
46
47	#define MAX_MP4_DESCR_COUNT 16
48
49	#define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
50	do { \
51	if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
52	(modulus) = (dividend) % (divisor); \
53	(prev_dividend) = (dividend); \
54	} while (0)
55
56	enum MpegTSFilterType {
57	MPEGTS_PES,
58	MPEGTS_SECTION,
59	MPEGTS_PCR,
60	};
61
62	typedef struct MpegTSFilter MpegTSFilter;
63
64	typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
65	int is_start, int64_t pos);
66
67	typedef struct MpegTSPESFilter {
68	PESCallback *pes_cb;
69	void *opaque;
70	} MpegTSPESFilter;
71
72	typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
73
74	typedef void SetServiceCallback (void *opaque, int ret);
75
76	typedef struct MpegTSSectionFilter {
77	int section_index;
78	int section_h_size;
79	int last_ver;
80	unsigned crc;
81	unsigned last_crc;
82	uint8_t *section_buf;
83	unsigned int check_crc : 1;
84	unsigned int end_of_section_reached : 1;
85	SectionCallback *section_cb;
86	void *opaque;
87	} MpegTSSectionFilter;
88
89	struct MpegTSFilter {
90	int pid;
91	int es_id;
92	int last_cc; /* last cc code (-1 if first packet) */
93	int64_t last_pcr;
94	enum MpegTSFilterType type;
95	union {
96	MpegTSPESFilter pes_filter;
97	MpegTSSectionFilter section_filter;
98	} u;
99	};
100
101	#define MAX_PIDS_PER_PROGRAM 64
102	struct Program {
103	unsigned int id; // program id/service id
104	unsigned int nb_pids;
105	unsigned int pids[MAX_PIDS_PER_PROGRAM];
106
107	/** have we found pmt for this program */
108	int pmt_found;
109	};
110
111	struct MpegTSContext {
112	const AVClass *class;
113	/* user data */
114	AVFormatContext *stream;
115	/** raw packet size, including FEC if present */
116	int raw_packet_size;
117
118	int size_stat[3];
119	int size_stat_count;
120	#define SIZE_STAT_THRESHOLD 10
121
122	int64_t pos47_full;
123
124	/** if true, all pids are analyzed to find streams */
125	int auto_guess;
126
127	/** compute exact PCR for each transport stream packet */
128	int mpeg2ts_compute_pcr;
129
130	/** fix dvb teletext pts */
131	int fix_teletext_pts;
132
133	int64_t cur_pcr; /**< used to estimate the exact PCR */
134	int pcr_incr; /**< used to estimate the exact PCR */
135
136	/* data needed to handle file based ts */
137	/** stop parsing loop */
138	int stop_parse;
139	/** packet containing Audio/Video data */
140	AVPacket *pkt;
141	/** to detect seek */
142	int64_t last_pos;
143
144	int skip_changes;
145	int skip_clear;
146
147	int scan_all_pmts;
148
149	int resync_size;
150
151	/******************************************/
152	/* private mpegts data */
153	/* scan context */
154	/** structure to keep track of Program->pids mapping */
155	unsigned int nb_prg;
156	struct Program *prg;
157
158	int8_t crc_validity[NB_PID_MAX];
159	/** filters for various streams specified by PMT + for the PAT and PMT */
160	MpegTSFilter *pids[NB_PID_MAX];
161	int current_pid;
162	};
163
164	#define MPEGTS_OPTIONS \
165	{ "resync_size", "set size limit for looking up a new synchronization", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
166
167	static const AVOption options[] = {
168	MPEGTS_OPTIONS,
169	{"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
170	{.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
171	{"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
172	{.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
173	{"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
174	{ .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
175	{"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
176	{.i64 = 0}, 0, 1, 0 },
177	{"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
178	{.i64 = 0}, 0, 1, 0 },
179	{ NULL },
180	};
181
182	static const AVClass mpegts_class = {
183	.class_name = "mpegts demuxer",
184	.item_name = av_default_item_name,
185	.option = options,
186	.version = LIBAVUTIL_VERSION_INT,
187	};
188
189	static const AVOption raw_options[] = {
190	MPEGTS_OPTIONS,
191	{ "compute_pcr", "compute exact PCR for each transport stream packet",
192	offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
193	{ .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
194	{ "ts_packetsize", "output option carrying the raw packet size",
195	offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
196	{ .i64 = 0 }, 0, 0,
197	AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
198	{ NULL },
199	};
200
201	static const AVClass mpegtsraw_class = {
202	.class_name = "mpegtsraw demuxer",
203	.item_name = av_default_item_name,
204	.option = raw_options,
205	.version = LIBAVUTIL_VERSION_INT,
206	};
207
208	/* TS stream handling */
209
210	enum MpegTSState {
211	MPEGTS_HEADER = 0,
212	MPEGTS_PESHEADER,
213	MPEGTS_PESHEADER_FILL,
214	MPEGTS_PAYLOAD,
215	MPEGTS_SKIP,
216	};
217
218	/* enough for PES header + length */
219	#define PES_START_SIZE 6
220	#define PES_HEADER_SIZE 9
221	#define MAX_PES_HEADER_SIZE (9 + 255)
222
223	typedef struct PESContext {
224	int pid;
225	int pcr_pid; /**< if -1 then all packets containing PCR are considered */
226	int stream_type;
227	MpegTSContext *ts;
228	AVFormatContext *stream;
229	AVStream *st;
230	AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
231	enum MpegTSState state;
232	/* used to get the format */
233	int data_index;
234	int flags; /**< copied to the AVPacket flags */
235	int total_size;
236	int pes_header_size;
237	int extended_stream_id;
238	uint8_t stream_id;
239	int64_t pts, dts;
240	int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
241	uint8_t header[MAX_PES_HEADER_SIZE];
242	AVBufferRef *buffer;
243	SLConfigDescr sl;
244	} PESContext;
245
246	extern AVInputFormat ff_mpegts_demuxer;
247
248	static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
249	{
250	int i;
251	for (i = 0; i < ts->nb_prg; i++) {
252	if (ts->prg[i].id == programid) {
253	return &ts->prg[i];
254	}
255	}
256	return NULL;
257	}
258
259	static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
260	{
261	AVProgram *prg = NULL;
262	int i;
263
264	for (i = 0; i < ts->stream->nb_programs; i++)
265	if (ts->stream->programs[i]->id == programid) {
266	prg = ts->stream->programs[i];
267	break;
268	}
269	if (!prg)
270	return;
271	prg->nb_stream_indexes = 0;
272	}
273
274	static void clear_program(MpegTSContext *ts, unsigned int programid)
275	{
276	int i;
277
278	clear_avprogram(ts, programid);
279	for (i = 0; i < ts->nb_prg; i++)
280	if (ts->prg[i].id == programid) {
281	ts->prg[i].nb_pids = 0;
282	ts->prg[i].pmt_found = 0;
283	}
284	}
285
286	static void clear_programs(MpegTSContext *ts)
287	{
288	av_freep(&ts->prg);
289	ts->nb_prg = 0;
290	}
291
292	static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
293	{
294	struct Program *p;
295	if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
296	ts->nb_prg = 0;
297	return;
298	}
299	p = &ts->prg[ts->nb_prg];
300	p->id = programid;
301	p->nb_pids = 0;
302	p->pmt_found = 0;
303	ts->nb_prg++;
304	}
305
306	static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid,
307	unsigned int pid)
308	{
309	struct Program *p = get_program(ts, programid);
310	int i;
311	if (!p)
312	return;
313
314	if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
315	return;
316
317	for (i = 0; i < p->nb_pids; i++)
318	if (p->pids[i] == pid)
319	return;
320
321	p->pids[p->nb_pids++] = pid;
322	}
323
324	static void set_pmt_found(MpegTSContext *ts, unsigned int programid)
325	{
326	struct Program *p = get_program(ts, programid);
327	if (!p)
328	return;
329
330	p->pmt_found = 1;
331	}
332
333	static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid)
334	{
335	int i;
336	for (i = 0; i < s->nb_programs; i++) {
337	if (s->programs[i]->id == programid) {
338	s->programs[i]->pcr_pid = pid;
339	break;
340	}
341	}
342	}
343
344	/**
345	* @brief discard_pid() decides if the pid is to be discarded according
346	* to caller's programs selection
347	* @param ts : - TS context
348	* @param pid : - pid
349	* @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
350	* 0 otherwise
351	*/
352	static int discard_pid(MpegTSContext *ts, unsigned int pid)
353	{
354	int i, j, k;
355	int used = 0, discarded = 0;
356	struct Program *p;
357
358	/* If none of the programs have .discard=AVDISCARD_ALL then there's
359	* no way we have to discard this packet */
360	for (k = 0; k < ts->stream->nb_programs; k++)
361	if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
362	break;
363	if (k == ts->stream->nb_programs)
364	return 0;
365
366	for (i = 0; i < ts->nb_prg; i++) {
367	p = &ts->prg[i];
368	for (j = 0; j < p->nb_pids; j++) {
369	if (p->pids[j] != pid)
370	continue;
371	// is program with id p->id set to be discarded?
372	for (k = 0; k < ts->stream->nb_programs; k++) {
373	if (ts->stream->programs[k]->id == p->id) {
374	if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
375	discarded++;
376	else
377	used++;
378	}
379	}
380	}
381	}
382
383	return !used && discarded;
384	}
385
386	/**
387	* Assemble PES packets out of TS packets, and then call the "section_cb"
388	* function when they are complete.
389	*/
390	static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
391	const uint8_t *buf, int buf_size, int is_start)
392	{
393	MpegTSSectionFilter *tss = &tss1->u.section_filter;
394	int len;
395
396	if (is_start) {
397	memcpy(tss->section_buf, buf, buf_size);
398	tss->section_index = buf_size;
399	tss->section_h_size = -1;
400	tss->end_of_section_reached = 0;
401	} else {
402	if (tss->end_of_section_reached)
403	return;
404	len = 4096 - tss->section_index;
405	if (buf_size < len)
406	len = buf_size;
407	memcpy(tss->section_buf + tss->section_index, buf, len);
408	tss->section_index += len;
409	}
410
411	/* compute section length if possible */
412	if (tss->section_h_size == -1 && tss->section_index >= 3) {
413	len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3;
414	if (len > 4096)
415	return;
416	tss->section_h_size = len;
417	}
418
419	if (tss->section_h_size != -1 &&
420	tss->section_index >= tss->section_h_size) {
421	int crc_valid = 1;
422	tss->end_of_section_reached = 1;
423
424	if (tss->check_crc) {
425	crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size);
426	if (tss->section_h_size >= 4)
427	tss->crc = AV_RB32(tss->section_buf + tss->section_h_size - 4);
428
429	if (crc_valid) {
430	ts->crc_validity[ tss1->pid ] = 100;
431	}else if (ts->crc_validity[ tss1->pid ] > -10) {
432	ts->crc_validity[ tss1->pid ]--;
433	}else
434	crc_valid = 2;
435	}
436	if (crc_valid) {
437	tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
438	if (crc_valid != 1)
439	tss->last_ver = -1;
440	}
441	}
442	}
443
444	static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
445	enum MpegTSFilterType type)
446	{
447	MpegTSFilter *filter;
448
449	av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
450
451	if (pid >= NB_PID_MAX || ts->pids[pid])
452	return NULL;
453	filter = av_mallocz(sizeof(MpegTSFilter));
454	if (!filter)
455	return NULL;
456	ts->pids[pid] = filter;
457
458	filter->type = type;
459	filter->pid = pid;
460	filter->es_id = -1;
461	filter->last_cc = -1;
462	filter->last_pcr= -1;
463
464	return filter;
465	}
466
467	static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
468	unsigned int pid,
469	SectionCallback *section_cb,
470	void *opaque,
471	int check_crc)
472	{
473	MpegTSFilter *filter;
474	MpegTSSectionFilter *sec;
475
476	if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION)))
477	return NULL;
478	sec = &filter->u.section_filter;
479	sec->section_cb = section_cb;
480	sec->opaque = opaque;
481	sec->section_buf = av_malloc(MAX_SECTION_SIZE);
482	sec->check_crc = check_crc;
483	sec->last_ver = -1;
484
485	if (!sec->section_buf) {
486	av_free(filter);
487	return NULL;
488	}
489	return filter;
490	}
491
492	static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
493	PESCallback *pes_cb,
494	void *opaque)
495	{
496	MpegTSFilter *filter;
497	MpegTSPESFilter *pes;
498
499	if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
500	return NULL;
501
502	pes = &filter->u.pes_filter;
503	pes->pes_cb = pes_cb;
504	pes->opaque = opaque;
505	return filter;
506	}
507
508	static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
509	{
510	return mpegts_open_filter(ts, pid, MPEGTS_PCR);
511	}
512
513	static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
514	{
515	int pid;
516
517	pid = filter->pid;
518	if (filter->type == MPEGTS_SECTION)
519	av_freep(&filter->u.section_filter.section_buf);
520	else if (filter->type == MPEGTS_PES) {
521	PESContext *pes = filter->u.pes_filter.opaque;
522	av_buffer_unref(&pes->buffer);
523	/* referenced private data will be freed later in
524	* avformat_close_input */
525	if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
526	av_freep(&filter->u.pes_filter.opaque);
527	}
528	}
529
530	av_free(filter);
531	ts->pids[pid] = NULL;
532	}
533
534	static int analyze(const uint8_t *buf, int size, int packet_size,
535	int probe)
536	{
537	int stat[TS_MAX_PACKET_SIZE];
538	int stat_all = 0;
539	int i;
540	int best_score = 0;
541
542	memset(stat, 0, packet_size * sizeof(*stat));
543
544	for (i = 0; i < size - 3; i++) {
545	if (buf[i] == 0x47) {
546	int pid = AV_RB16(buf+1) & 0x1FFF;
547	int asc = buf[i + 3] & 0x30;
548	if (!probe || pid == 0x1FFF || asc) {
549	int x = i % packet_size;
550	stat[x]++;
551	stat_all++;
552	if (stat[x] > best_score) {
553	best_score = stat[x];
554	}
555	}
556	}
557	}
558
559	return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
560	}
561
562	/* autodetect fec presence. Must have at least 1024 bytes */
563	static int get_packet_size(const uint8_t *buf, int size)
564	{
565	int score, fec_score, dvhs_score;
566
567	if (size < (TS_FEC_PACKET_SIZE * 5 + 1))
568	return AVERROR_INVALIDDATA;
569
570	score = analyze(buf, size, TS_PACKET_SIZE, 0);
571	dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, 0);
572	fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, 0);
573	av_log(NULL, AV_LOG_TRACE, "score: %d, dvhs_score: %d, fec_score: %d \n",
574	score, dvhs_score, fec_score);
575
576	if (score > fec_score && score > dvhs_score)
577	return TS_PACKET_SIZE;
578	else if (dvhs_score > score && dvhs_score > fec_score)
579	return TS_DVHS_PACKET_SIZE;
580	else if (score < fec_score && dvhs_score < fec_score)
581	return TS_FEC_PACKET_SIZE;
582	else
583	return AVERROR_INVALIDDATA;
584	}
585
586	typedef struct SectionHeader {
587	uint8_t tid;
588	uint16_t id;
589	uint8_t version;
590	uint8_t sec_num;
591	uint8_t last_sec_num;
592	} SectionHeader;
593
594	static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
595	{
596	if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
597	return 1;
598
599	tssf->last_ver = h->version;
600	tssf->last_crc = tssf->crc;
601
602	return 0;
603	}
604
605	static inline int get8(const uint8_t **pp, const uint8_t *p_end)
606	{
607	const uint8_t *p;
608	int c;
609
610	p = *pp;
611	if (p >= p_end)
612	return AVERROR_INVALIDDATA;
613	c = *p++;
614	*pp = p;
615	return c;
616	}
617
618	static inline int get16(const uint8_t **pp, const uint8_t *p_end)
619	{
620	const uint8_t *p;
621	int c;
622
623	p = *pp;
624	if (1 >= p_end - p)
625	return AVERROR_INVALIDDATA;
626	c = AV_RB16(p);
627	p += 2;
628	*pp = p;
629	return c;
630	}
631
632	/* read and allocate a DVB string preceded by its length */
633	static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
634	{
635	int len;
636	const uint8_t *p;
637	char *str;
638
639	p = *pp;
640	len = get8(&p, p_end);
641	if (len < 0)
642	return NULL;
643	if (len > p_end - p)
644	return NULL;
645	str = av_malloc(len + 1);
646	if (!str)
647	return NULL;
648	memcpy(str, p, len);
649	str[len] = '\0';
650	p += len;
651	*pp = p;
652	return str;
653	}
654
655	static int parse_section_header(SectionHeader *h,
656	const uint8_t **pp, const uint8_t *p_end)
657	{
658	int val;
659
660	val = get8(pp, p_end);
661	if (val < 0)
662	return val;
663	h->tid = val;
664	*pp += 2;
665	val = get16(pp, p_end);
666	if (val < 0)
667	return val;
668	h->id = val;
669	val = get8(pp, p_end);
670	if (val < 0)
671	return val;
672	h->version = (val >> 1) & 0x1f;
673	val = get8(pp, p_end);
674	if (val < 0)
675	return val;
676	h->sec_num = val;
677	val = get8(pp, p_end);
678	if (val < 0)
679	return val;
680	h->last_sec_num = val;
681	return 0;
682	}
683
684	typedef struct StreamType {
685	uint32_t stream_type;
686	enum AVMediaType codec_type;
687	enum AVCodecID codec_id;
688	} StreamType;
689
690	static const StreamType ISO_types[] = {
691	{ 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
692	{ 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
693	{ 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
694	{ 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
695	{ 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
696	{ 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
697	/* Makito encoder sets stream type 0x11 for AAC,
698	* so auto-detect LOAS/LATM instead of hardcoding it. */
699	#if !CONFIG_LOAS_DEMUXER
700	{ 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
701	#endif
702	{ 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
703	{ 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
704	{ 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
705	{ 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
706	{ 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
707	{ 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
708	{ 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
709	{ 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
710	{ 0 },
711	};
712
713	static const StreamType HDMV_types[] = {
714	{ 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
715	{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
716	{ 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
717	{ 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
718	{ 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
719	{ 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
720	{ 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
721	{ 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
722	{ 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
723	{ 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
724	{ 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
725	{ 0 },
726	};
727
728	/* SCTE types */
729	static const StreamType SCTE_types[] = {
730	{ 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
731	{ 0 },
732	};
733
734	/* ATSC ? */
735	static const StreamType MISC_types[] = {
736	{ 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
737	{ 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
738	{ 0 },
739	};
740
741	static const StreamType REGD_types[] = {
742	{ MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
743	{ MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
744	{ MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
745	{ MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
746	{ MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
747	{ MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
748	{ MKTAG('D', 'T', 'S', 'H'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
749	{ MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
750	{ MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
751	{ MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
752	{ MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
753	{ MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
754	{ MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
755	{ MKTAG('D', 'R', 'A', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DRA },
756	{ 0 },
757	};
758
759	static const StreamType METADATA_types[] = {
760	{ MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
761	{ MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
762	{ 0 },
763	};
764
765	/* descriptor present */
766	static const StreamType DESC_types[] = {
767	{ 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
768	{ 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
769	{ 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
770	{ 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
771	{ 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
772	{ 0 },
773	};
774
775	static void mpegts_find_stream_type(AVStream *st,
776	uint32_t stream_type,
777	const StreamType *types)
778	{
779	for (; types->stream_type; types++)
780	if (stream_type == types->stream_type) {
781	if (st->codecpar->codec_type != types->codec_type ||
782	st->codecpar->codec_id != types->codec_id) {
783	st->codecpar->codec_type = types->codec_type;
784	st->codecpar->codec_id = types->codec_id;
785	st->internal->need_context_update = 1;
786	}
787	st->request_probe = 0;
788	return;
789	}
790	}
791
792	static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
793	uint32_t stream_type, uint32_t prog_reg_desc)
794	{
795	int old_codec_type = st->codecpar->codec_type;
796	int old_codec_id = st->codecpar->codec_id;
797	int old_codec_tag = st->codecpar->codec_tag;
798
799	if (avcodec_is_open(st->internal->avctx)) {
800	av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
801	return 0;
802	}
803
804	avpriv_set_pts_info(st, 33, 1, 90000);
805	st->priv_data = pes;
806	st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
807	st->codecpar->codec_id = AV_CODEC_ID_NONE;
808	st->need_parsing = AVSTREAM_PARSE_FULL;
809	pes->st = st;
810	pes->stream_type = stream_type;
811
812	av_log(pes->stream, AV_LOG_DEBUG,
813	"stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
814	st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
815
816	st->codecpar->codec_tag = pes->stream_type;
817
818	mpegts_find_stream_type(st, pes->stream_type, ISO_types);
819	if (pes->stream_type == 4)
820	st->request_probe = 50;
821	if ((prog_reg_desc == AV_RL32("HDMV") ||
822	prog_reg_desc == AV_RL32("HDPR")) &&
823	st->codecpar->codec_id == AV_CODEC_ID_NONE) {
824	mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
825	if (pes->stream_type == 0x83) {
826	// HDMV TrueHD streams also contain an AC3 coded version of the
827	// audio track - add a second stream for this
828	AVStream *sub_st;
829	// priv_data cannot be shared between streams
830	PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
831	if (!sub_pes)
832	return AVERROR(ENOMEM);
833	memcpy(sub_pes, pes, sizeof(*sub_pes));
834
835	sub_st = avformat_new_stream(pes->stream, NULL);
836	if (!sub_st) {
837	av_free(sub_pes);
838	return AVERROR(ENOMEM);
839	}
840
841	sub_st->id = pes->pid;
842	avpriv_set_pts_info(sub_st, 33, 1, 90000);
843	sub_st->priv_data = sub_pes;
844	sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
845	sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
846	sub_st->need_parsing = AVSTREAM_PARSE_FULL;
847	sub_pes->sub_st = pes->sub_st = sub_st;
848	}
849	if (pes->stream_type == 0x81) {
850	// HDMV AC3 streams also contain an TRUEHD coded version of the
851	// audio track - add a second stream for this
852	AVStream *sub_st;
853	// priv_data cannot be shared between streams
854	PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
855	if (!sub_pes)
856	return AVERROR(ENOMEM);
857	memcpy(sub_pes, pes, sizeof(*sub_pes));
858
859	sub_st = avformat_new_stream(pes->stream, NULL);
860	if (!sub_st) {
861	av_free(sub_pes);
862	return AVERROR(ENOMEM);
863	}
864
865	sub_st->id = pes->pid;
866	avpriv_set_pts_info(sub_st, 33, 1, 90000);
867	sub_st->priv_data = sub_pes;
868	sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
869	sub_st->codec->codec_id = AV_CODEC_ID_TRUEHD;
870	sub_st->need_parsing = AVSTREAM_PARSE_FULL;
871	sub_st->discard = AVDISCARD_ALL;
872	sub_pes->sub_st = pes->sub_st = sub_st;
873	}
874	}
875	if (st->codec->codec_id == AV_CODEC_ID_NONE && pes->stream_type == 0x82) {
876	AVStream *sub_st;
877	PESContext *sub_pes = av_malloc(sizeof(*sub_pes));
878	if (!sub_pes)
879	return AVERROR(ENOMEM);
880	memcpy(sub_pes, pes, sizeof(*sub_pes));
881	sub_st = avformat_new_stream(pes->stream, NULL);
882	if (!sub_st) {
883	av_free(sub_pes);
884	return AVERROR(ENOMEM);
885	}
886
887	sub_st->id = pes->pid;
888	avpriv_set_pts_info(sub_st, 33, 1, 90000);
889	sub_st->priv_data = sub_pes;
890	sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
891	sub_st->codec->codec_id = AV_CODEC_ID_DTS;
892	sub_st->need_parsing = AVSTREAM_PARSE_FULL;
893	sub_pes->sub_st = pes->sub_st = sub_st;
894	}
895	if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
896	mpegts_find_stream_type(st, pes->stream_type, MISC_types);
897	if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
898	st->codecpar->codec_id = old_codec_id;
899	st->codecpar->codec_type = old_codec_type;
900	}
901	if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
902	(st->request_probe > 0 && st->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
903	st->probe_packets > 0 &&
904	stream_type == STREAM_TYPE_PRIVATE_DATA) {
905	st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
906	st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
907	st->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
908	}
909
910	/* queue a context update if properties changed */
911	if (old_codec_type != st->codecpar->codec_type ||
912	old_codec_id != st->codecpar->codec_id ||
913	old_codec_tag != st->codecpar->codec_tag)
914	st->internal->need_context_update = 1;
915
916	return 0;
917	}
918
919	static void reset_pes_packet_state(PESContext *pes)
920	{
921	pes->pts = AV_NOPTS_VALUE;
922	pes->dts = AV_NOPTS_VALUE;
923	pes->data_index = 0;
924	pes->flags = 0;
925	av_buffer_unref(&pes->buffer);
926	}
927
928	static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
929	{
930	av_init_packet(pkt);
931	pkt->data = (uint8_t *)buffer;
932	pkt->size = len;
933	}
934
935	static int new_pes_packet(PESContext *pes, AVPacket *pkt)
936	{
937	char *sd;
938
939	av_init_packet(pkt);
940
941	pkt->buf = pes->buffer;
942	pkt->data = pes->buffer->data;
943	pkt->size = pes->data_index;
944
945	if (pes->total_size != MAX_PES_PAYLOAD &&
946	pes->pes_header_size + pes->data_index != pes->total_size +
947	PES_START_SIZE) {
948	av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
949	pes->flags |= AV_PKT_FLAG_CORRUPT;
950	}
951	memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
952
953	// Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
954	if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
955	pkt->stream_index = pes->sub_st->index;
956	else if (pes->sub_st && pes->stream_type == 0x81 && pes->extended_stream_id == 0x72)
957	pkt->stream_index = pes->sub_st->index;
958	else
959	pkt->stream_index = pes->st->index;
960	pkt->pts = pes->pts;
961	pkt->dts = pes->dts;
962	/* store position of first TS packet of this PES packet */
963	pkt->pos = pes->ts_packet_pos;
964	pkt->flags = pes->flags;
965
966	pes->buffer = NULL;
967	reset_pes_packet_state(pes);
968
969	sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
970	if (!sd)
971	return AVERROR(ENOMEM);
972	*sd = pes->stream_id;
973
974	return 0;
975	}
976
977	static uint64_t get_ts64(GetBitContext *gb, int bits)
978	{
979	if (get_bits_left(gb) < bits)
980	return AV_NOPTS_VALUE;
981	return get_bits64(gb, bits);
982	}
983
984	static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
985	const uint8_t *buf, int buf_size)
986	{
987	GetBitContext gb;
988	int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
989	int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
990	int dts_flag = -1, cts_flag = -1;
991	int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
992	uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
993	int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
994
995	memcpy(buf_padded, buf, buf_padded_size);
996
997	init_get_bits(&gb, buf_padded, buf_padded_size * 8);
998
999	if (sl->use_au_start)
1000	au_start_flag = get_bits1(&gb);
1001	if (sl->use_au_end)
1002	au_end_flag = get_bits1(&gb);
1003	if (!sl->use_au_start && !sl->use_au_end)
1004	au_start_flag = au_end_flag = 1;
1005	if (sl->ocr_len > 0)
1006	ocr_flag = get_bits1(&gb);
1007	if (sl->use_idle)
1008	idle_flag = get_bits1(&gb);
1009	if (sl->use_padding)
1010	padding_flag = get_bits1(&gb);
1011	if (padding_flag)
1012	padding_bits = get_bits(&gb, 3);
1013
1014	if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1015	if (sl->packet_seq_num_len)
1016	skip_bits_long(&gb, sl->packet_seq_num_len);
1017	if (sl->degr_prior_len)
1018	if (get_bits1(&gb))
1019	skip_bits(&gb, sl->degr_prior_len);
1020	if (ocr_flag)
1021	skip_bits_long(&gb, sl->ocr_len);
1022	if (au_start_flag) {
1023	if (sl->use_rand_acc_pt)
1024	get_bits1(&gb);
1025	if (sl->au_seq_num_len > 0)
1026	skip_bits_long(&gb, sl->au_seq_num_len);
1027	if (sl->use_timestamps) {
1028	dts_flag = get_bits1(&gb);
1029	cts_flag = get_bits1(&gb);
1030	}
1031	}
1032	if (sl->inst_bitrate_len)
1033	inst_bitrate_flag = get_bits1(&gb);
1034	if (dts_flag == 1)
1035	dts = get_ts64(&gb, sl->timestamp_len);
1036	if (cts_flag == 1)
1037	cts = get_ts64(&gb, sl->timestamp_len);
1038	if (sl->au_len > 0)
1039	skip_bits_long(&gb, sl->au_len);
1040	if (inst_bitrate_flag)
1041	skip_bits_long(&gb, sl->inst_bitrate_len);
1042	}
1043
1044	if (dts != AV_NOPTS_VALUE)
1045	pes->dts = dts;
1046	if (cts != AV_NOPTS_VALUE)
1047	pes->pts = cts;
1048
1049	if (sl->timestamp_len && sl->timestamp_res)
1050	avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1051
1052	return (get_bits_count(&gb) + 7) >> 3;
1053	}
1054
1055	/* return non zero if a packet could be constructed */
1056	static int mpegts_push_data(MpegTSFilter *filter,
1057	const uint8_t *buf, int buf_size, int is_start,
1058	int64_t pos)
1059	{
1060	PESContext *pes = filter->u.pes_filter.opaque;
1061	MpegTSContext *ts = pes->ts;
1062	const uint8_t *p;
1063	int ret, len, code;
1064
1065	if (!ts->pkt)
1066	return 0;
1067
1068	if (is_start) {
1069	if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1070	ret = new_pes_packet(pes, ts->pkt);
1071	if (ret < 0)
1072	return ret;
1073	ts->stop_parse = 1;
1074	} else {
1075	reset_pes_packet_state(pes);
1076	}
1077	pes->state = MPEGTS_HEADER;
1078	pes->ts_packet_pos = pos;
1079	}
1080	p = buf;
1081	while (buf_size > 0) {
1082	switch (pes->state) {
1083	case MPEGTS_HEADER:
1084	len = PES_START_SIZE - pes->data_index;
1085	if (len > buf_size)
1086	len = buf_size;
1087	memcpy(pes->header + pes->data_index, p, len);
1088	pes->data_index += len;
1089	p += len;
1090	buf_size -= len;
1091	if (pes->data_index == PES_START_SIZE) {
1092	/* we got all the PES or section header. We can now
1093	* decide */
1094	if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1095	pes->header[2] == 0x01) {
1096	/* it must be an MPEG-2 PES stream */
1097	code = pes->header[3] | 0x100;
1098	av_log(pes->stream, AV_LOG_TRACE, "pid=%x pes_code=%#x\n", pes->pid,
1099	code);
1100	pes->stream_id = pes->header[3];
1101
1102	if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1103	(!pes->sub_st ||
1104	pes->sub_st->discard == AVDISCARD_ALL)) ||
1105	code == 0x1be) /* padding_stream */
1106	goto skip;
1107
1108	/* stream not present in PMT */
1109	if (!pes->st) {
1110	if (ts->skip_changes)
1111	goto skip;
1112
1113	pes->st = avformat_new_stream(ts->stream, NULL);
1114	if (!pes->st)
1115	return AVERROR(ENOMEM);
1116	pes->st->id = pes->pid;
1117	mpegts_set_stream_info(pes->st, pes, 0, 0);
1118	}
1119
1120	pes->total_size = AV_RB16(pes->header + 4);
1121	/* NOTE: a zero total size means the PES size is
1122	* unbounded */
1123	if (!pes->total_size)
1124	pes->total_size = MAX_PES_PAYLOAD;
1125
1126	/* allocate pes buffer */
1127	pes->buffer = av_buffer_alloc(pes->total_size +
1128	AV_INPUT_BUFFER_PADDING_SIZE);
1129	if (!pes->buffer)
1130	return AVERROR(ENOMEM);
1131
1132	if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */
1133	code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */
1134	code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */
1135	code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */
1136	pes->state = MPEGTS_PESHEADER;
1137	if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) {
1138	av_log(pes->stream, AV_LOG_TRACE,
1139	"pid=%x stream_type=%x probing\n",
1140	pes->pid,
1141	pes->stream_type);
1142	pes->st->request_probe = 1;
1143	}
1144	} else {
1145	pes->pes_header_size = 6;
1146	pes->state = MPEGTS_PAYLOAD;
1147	pes->data_index = 0;
1148	}
1149	} else {
1150	/* otherwise, it should be a table */
1151	/* skip packet */
1152	skip:
1153	pes->state = MPEGTS_SKIP;
1154	continue;
1155	}
1156	}
1157	break;
1158	/**********************************************/
1159	/* PES packing parsing */
1160	case MPEGTS_PESHEADER:
1161	len = PES_HEADER_SIZE - pes->data_index;
1162	if (len < 0)
1163	return AVERROR_INVALIDDATA;
1164	if (len > buf_size)
1165	len = buf_size;
1166	memcpy(pes->header + pes->data_index, p, len);
1167	pes->data_index += len;
1168	p += len;
1169	buf_size -= len;
1170	if (pes->data_index == PES_HEADER_SIZE) {
1171	pes->pes_header_size = pes->header[8] + 9;
1172	pes->state = MPEGTS_PESHEADER_FILL;
1173	}
1174	break;
1175	case MPEGTS_PESHEADER_FILL:
1176	len = pes->pes_header_size - pes->data_index;
1177	if (len < 0)
1178	return AVERROR_INVALIDDATA;
1179	if (len > buf_size)
1180	len = buf_size;
1181	memcpy(pes->header + pes->data_index, p, len);
1182	pes->data_index += len;
1183	p += len;
1184	buf_size -= len;
1185	if (pes->data_index == pes->pes_header_size) {
1186	const uint8_t *r;
1187	unsigned int flags, pes_ext, skip;
1188
1189	flags = pes->header[7];
1190	r = pes->header + 9;
1191	pes->pts = AV_NOPTS_VALUE;
1192	pes->dts = AV_NOPTS_VALUE;
1193	if ((flags & 0xc0) == 0x80) {
1194	pes->dts = pes->pts = ff_parse_pes_pts(r);
1195	r += 5;
1196	} else if ((flags & 0xc0) == 0xc0) {
1197	pes->pts = ff_parse_pes_pts(r);
1198	r += 5;
1199	pes->dts = ff_parse_pes_pts(r);
1200	r += 5;
1201	}
1202	pes->extended_stream_id = -1;
1203	if (flags & 0x01) { /* PES extension */
1204	pes_ext = *r++;
1205	/* Skip PES private data, program packet sequence counter and P-STD buffer */
1206	skip = (pes_ext >> 4) & 0xb;
1207	skip += skip & 0x9;
1208	r += skip;
1209	if ((pes_ext & 0x41) == 0x01 &&
1210	(r + 2) <= (pes->header + pes->pes_header_size)) {
1211	/* PES extension 2 */
1212	if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1213	pes->extended_stream_id = r[1];
1214	}
1215	}
1216
1217	/* we got the full header. We parse it and get the payload */
1218	pes->state = MPEGTS_PAYLOAD;
1219	pes->data_index = 0;
1220	if (pes->stream_type == 0x12 && buf_size > 0) {
1221	int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1222	buf_size);
1223	pes->pes_header_size += sl_header_bytes;
1224	p += sl_header_bytes;
1225	buf_size -= sl_header_bytes;
1226	}
1227	if (pes->stream_type == 0x15 && buf_size >= 5) {
1228	/* skip metadata access unit header */
1229	pes->pes_header_size += 5;
1230	p += 5;
1231	buf_size -= 5;
1232	}
1233	if ( pes->ts->fix_teletext_pts
1234	&& ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1235	|| pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1236	) {
1237	AVProgram *p = NULL;
1238	while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1239	if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1240	MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1241	if (f) {
1242	AVStream *st = NULL;
1243	if (f->type == MPEGTS_PES) {
1244	PESContext *pcrpes = f->u.pes_filter.opaque;
1245	if (pcrpes)
1246	st = pcrpes->st;
1247	} else if (f->type == MPEGTS_PCR) {
1248	int i;
1249	for (i = 0; i < p->nb_stream_indexes; i++) {
1250	AVStream *pst = pes->stream->streams[p->stream_index[i]];
1251	if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1252	st = pst;
1253	}
1254	}
1255	if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) {
1256	// teletext packets do not always have correct timestamps,
1257	// the standard says they should be handled after 40.6 ms at most,
1258	// and the pcr error to this packet should be no more than 100 ms.
1259	// TODO: we should interpolate the PCR, not just use the last one
1260	int64_t pcr = f->last_pcr / 300;
1261	pes->st->pts_wrap_reference = st->pts_wrap_reference;
1262	pes->st->pts_wrap_behavior = st->pts_wrap_behavior;
1263	if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1264	pes->pts = pes->dts = pcr;
1265	} else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1266	pes->dts > pcr + 3654 + 9000) {
1267	pes->pts = pes->dts = pcr + 3654 + 9000;
1268	} else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1269	pes->dts > pcr + 10*90000) { //10sec
1270	pes->pts = pes->dts = pcr + 3654 + 9000;
1271	}
1272	break;
1273	}
1274	}
1275	}
1276	}
1277	}
1278	}
1279	break;
1280	case MPEGTS_PAYLOAD:
1281	if (pes->buffer) {
1282	if (pes->data_index > 0 &&
1283	pes->data_index + buf_size > pes->total_size) {
1284	ret = new_pes_packet(pes, ts->pkt);
1285	if (ret < 0)
1286	return ret;
1287	pes->total_size = MAX_PES_PAYLOAD;
1288	pes->buffer = av_buffer_alloc(pes->total_size +
1289	AV_INPUT_BUFFER_PADDING_SIZE);
1290	if (!pes->buffer)
1291	return AVERROR(ENOMEM);
1292	ts->stop_parse = 1;
1293	} else if (pes->data_index == 0 &&
1294	buf_size > pes->total_size) {
1295	// pes packet size is < ts size packet and pes data is padded with 0xff
1296	// not sure if this is legal in ts but see issue #2392
1297	buf_size = pes->total_size;
1298	}
1299	memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1300	pes->data_index += buf_size;
1301	/* emit complete packets with known packet size
1302	* decreases demuxer delay for infrequent packets like subtitles from
1303	* a couple of seconds to milliseconds for properly muxed files.
1304	* total_size is the number of bytes following pes_packet_length
1305	* in the pes header, i.e. not counting the first PES_START_SIZE bytes */
1306	if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD &&
1307	pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) {
1308	ts->stop_parse = 1;
1309	ret = new_pes_packet(pes, ts->pkt);
1310	if (ret < 0)
1311	return ret;
1312	}
1313	}
1314	buf_size = 0;
1315	break;
1316	case MPEGTS_SKIP:
1317	buf_size = 0;
1318	break;
1319	}
1320	}
1321
1322	return 0;
1323	}
1324
1325	static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1326	{
1327	MpegTSFilter *tss;
1328	PESContext *pes;
1329
1330	/* if no pid found, then add a pid context */
1331	pes = av_mallocz(sizeof(PESContext));
1332	if (!pes)
1333	return 0;
1334	pes->ts = ts;
1335	pes->stream = ts->stream;
1336	pes->pid = pid;
1337	pes->pcr_pid = pcr_pid;
1338	pes->state = MPEGTS_SKIP;
1339	pes->pts = AV_NOPTS_VALUE;
1340	pes->dts = AV_NOPTS_VALUE;
1341	tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1342	if (!tss) {
1343	av_free(pes);
1344	return 0;
1345	}
1346	return pes;
1347	}
1348
1349	#define MAX_LEVEL 4
1350	typedef struct MP4DescrParseContext {
1351	AVFormatContext *s;
1352	AVIOContext pb;
1353	Mp4Descr *descr;
1354	Mp4Descr *active_descr;
1355	int descr_count;
1356	int max_descr_count;
1357	int level;
1358	int predefined_SLConfigDescriptor_seen;
1359	} MP4DescrParseContext;
1360
1361	static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1362	const uint8_t *buf, unsigned size,
1363	Mp4Descr *descr, int max_descr_count)
1364	{
1365	int ret;
1366	if (size > (1 << 30))
1367	return AVERROR_INVALIDDATA;
1368
1369	if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0,
1370	NULL, NULL, NULL, NULL)) < 0)
1371	return ret;
1372
1373	d->s = s;
1374	d->level = 0;
1375	d->descr_count = 0;
1376	d->descr = descr;
1377	d->active_descr = NULL;
1378	d->max_descr_count = max_descr_count;
1379
1380	return 0;
1381	}
1382
1383	static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1384	{
1385	int64_t new_off = avio_tell(pb);
1386	(*len) -= new_off - *off;
1387	*off = new_off;
1388	}
1389
1390	static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1391	int target_tag);
1392
1393	static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1394	{
1395	while (len > 0) {
1396	int ret = parse_mp4_descr(d, off, len, 0);
1397	if (ret < 0)
1398	return ret;
1399	update_offsets(&d->pb, &off, &len);
1400	}
1401	return 0;
1402	}
1403
1404	static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1405	{
1406	avio_rb16(&d->pb); // ID
1407	avio_r8(&d->pb);
1408	avio_r8(&d->pb);
1409	avio_r8(&d->pb);
1410	avio_r8(&d->pb);
1411	avio_r8(&d->pb);
1412	update_offsets(&d->pb, &off, &len);
1413	return parse_mp4_descr_arr(d, off, len);
1414	}
1415
1416	static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1417	{
1418	int id_flags;
1419	if (len < 2)
1420	return 0;
1421	id_flags = avio_rb16(&d->pb);
1422	if (!(id_flags & 0x0020)) { // URL_Flag
1423	update_offsets(&d->pb, &off, &len);
1424	return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1425	} else {
1426	return 0;
1427	}
1428	}
1429
1430	static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1431	{
1432	int es_id = 0;
1433	int ret = 0;
1434
1435	if (d->descr_count >= d->max_descr_count)
1436	return AVERROR_INVALIDDATA;
1437	ff_mp4_parse_es_descr(&d->pb, &es_id);
1438	d->active_descr = d->descr + (d->descr_count++);
1439
1440	d->active_descr->es_id = es_id;
1441	update_offsets(&d->pb, &off, &len);
1442	if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1443	return ret;
1444	update_offsets(&d->pb, &off, &len);
1445	if (len > 0)
1446	ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1447	d->active_descr = NULL;
1448	return ret;
1449	}
1450
1451	static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1452	int len)
1453	{
1454	Mp4Descr *descr = d->active_descr;
1455	if (!descr)
1456	return AVERROR_INVALIDDATA;
1457	d->active_descr->dec_config_descr = av_malloc(len);
1458	if (!descr->dec_config_descr)
1459	return AVERROR(ENOMEM);
1460	descr->dec_config_descr_len = len;
1461	avio_read(&d->pb, descr->dec_config_descr, len);
1462	return 0;
1463	}
1464
1465	static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1466	{
1467	Mp4Descr *descr = d->active_descr;
1468	int predefined;
1469	if (!descr)
1470	return AVERROR_INVALIDDATA;
1471
1472	#define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1473	descr->sl.dst = avio_r8(&d->pb); \
1474	if (descr->sl.dst > maxv) { \
1475	descr->sl.dst = maxv; \
1476	return AVERROR_INVALIDDATA; \
1477	} \
1478	} while (0)
1479
1480	predefined = avio_r8(&d->pb);
1481	if (!predefined) {
1482	int lengths;
1483	int flags = avio_r8(&d->pb);
1484	descr->sl.use_au_start = !!(flags & 0x80);
1485	descr->sl.use_au_end = !!(flags & 0x40);
1486	descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1487	descr->sl.use_padding = !!(flags & 0x08);
1488	descr->sl.use_timestamps = !!(flags & 0x04);
1489	descr->sl.use_idle = !!(flags & 0x02);
1490	descr->sl.timestamp_res = avio_rb32(&d->pb);
1491	avio_rb32(&d->pb);
1492	R8_CHECK_CLIP_MAX(timestamp_len, 63);
1493	R8_CHECK_CLIP_MAX(ocr_len, 63);
1494	R8_CHECK_CLIP_MAX(au_len, 31);
1495	descr->sl.inst_bitrate_len = avio_r8(&d->pb);
1496	lengths = avio_rb16(&d->pb);
1497	descr->sl.degr_prior_len = lengths >> 12;
1498	descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1499	descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1500	} else if (!d->predefined_SLConfigDescriptor_seen){
1501	avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1502	d->predefined_SLConfigDescriptor_seen = 1;
1503	}
1504	return 0;
1505	}
1506
1507	static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1508	int target_tag)
1509	{
1510	int tag;
1511	int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag);
1512	int ret = 0;
1513
1514	update_offsets(&d->pb, &off, &len);
1515	if (len < 0 || len1 > len || len1 <= 0) {
1516	av_log(d->s, AV_LOG_ERROR,
1517	"Tag %x length violation new length %d bytes remaining %d\n",
1518	tag, len1, len);
1519	return AVERROR_INVALIDDATA;
1520	}
1521
1522	if (d->level++ >= MAX_LEVEL) {
1523	av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1524	ret = AVERROR_INVALIDDATA;
1525	goto done;
1526	}
1527
1528	if (target_tag && tag != target_tag) {
1529	av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1530	target_tag);
1531	ret = AVERROR_INVALIDDATA;
1532	goto done;
1533	}
1534
1535	switch (tag) {
1536	case MP4IODescrTag:
1537	ret = parse_MP4IODescrTag(d, off, len1);
1538	break;
1539	case MP4ODescrTag:
1540	ret = parse_MP4ODescrTag(d, off, len1);
1541	break;
1542	case MP4ESDescrTag:
1543	ret = parse_MP4ESDescrTag(d, off, len1);
1544	break;
1545	case MP4DecConfigDescrTag:
1546	ret = parse_MP4DecConfigDescrTag(d, off, len1);
1547	break;
1548	case MP4SLDescrTag:
1549	ret = parse_MP4SLDescrTag(d, off, len1);
1550	break;
1551	}
1552
1553
1554	done:
1555	d->level--;
1556	avio_seek(&d->pb, off + len1, SEEK_SET);
1557	return ret;
1558	}
1559
1560	static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1561	Mp4Descr *descr, int *descr_count, int max_descr_count)
1562	{
1563	MP4DescrParseContext d;
1564	int ret;
1565
1566	ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1567	if (ret < 0)
1568	return ret;
1569
1570	ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag);
1571
1572	*descr_count = d.descr_count;
1573	return ret;
1574	}
1575
1576	static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1577	Mp4Descr *descr, int *descr_count, int max_descr_count)
1578	{
1579	MP4DescrParseContext d;
1580	int ret;
1581
1582	ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1583	if (ret < 0)
1584	return ret;
1585
1586	ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size);
1587
1588	*descr_count = d.descr_count;
1589	return ret;
1590	}
1591
1592	static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1593	int section_len)
1594	{
1595	MpegTSContext *ts = filter->u.section_filter.opaque;
1596	MpegTSSectionFilter *tssf = &filter->u.section_filter;
1597	SectionHeader h;
1598	const uint8_t *p, *p_end;
1599	AVIOContext pb;
1600	int mp4_descr_count = 0;
1601	Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1602	int i, pid;
1603	AVFormatContext *s = ts->stream;
1604
1605	p_end = section + section_len - 4;
1606	p = section;
1607	if (parse_section_header(&h, &p, p_end) < 0)
1608	return;
1609	if (h.tid != M4OD_TID)
1610	return;
1611	if (skip_identical(&h, tssf))
1612	return;
1613
1614	mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1615	MAX_MP4_DESCR_COUNT);
1616
1617	for (pid = 0; pid < NB_PID_MAX; pid++) {
1618	if (!ts->pids[pid])
1619	continue;
1620	for (i = 0; i < mp4_descr_count; i++) {
1621	PESContext *pes;
1622	AVStream *st;
1623	if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1624	continue;
1625	if (ts->pids[pid]->type != MPEGTS_PES) {
1626	av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1627	continue;
1628	}
1629	pes = ts->pids[pid]->u.pes_filter.opaque;
1630	st = pes->st;
1631	if (!st)
1632	continue;
1633
1634	pes->sl = mp4_descr[i].sl;
1635
1636	ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1637	mp4_descr[i].dec_config_descr_len, 0,
1638	NULL, NULL, NULL, NULL);
1639	ff_mp4_read_dec_config_descr(s, st, &pb);
1640	if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1641	st->codecpar->extradata_size > 0)
1642	st->need_parsing = 0;
1643	if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1644	st->codecpar->extradata_size > 0)
1645	st->need_parsing = 0;
1646
1647	st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1648	st->internal->need_context_update = 1;
1649	}
1650	}
1651	for (i = 0; i < mp4_descr_count; i++)
1652	av_free(mp4_descr[i].dec_config_descr);
1653	}
1654
1655	static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1656	int section_len)
1657	{
1658	AVProgram *prg = NULL;
1659	MpegTSContext *ts = filter->u.section_filter.opaque;
1660
1661	int idx = ff_find_stream_index(ts->stream, filter->pid);
1662	if (idx < 0)
1663	return;
1664
1665	new_data_packet(section, section_len, ts->pkt);
1666	ts->pkt->stream_index = idx;
1667	prg = av_find_program_from_stream(ts->stream, NULL, idx);
1668	if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1669	MpegTSFilter *f = ts->pids[prg->pcr_pid];
1670	if (f && f->last_pcr != -1)
1671	ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1672	}
1673	ts->stop_parse = 1;
1674
1675	}
1676
1677	static const uint8_t opus_coupled_stream_cnt[9] = {
1678	1, 0, 1, 1, 2, 2, 2, 3, 3
1679	};
1680
1681	static const uint8_t opus_stream_cnt[9] = {
1682	1, 1, 1, 2, 2, 3, 4, 4, 5,
1683	};
1684
1685	static const uint8_t opus_channel_map[8][8] = {
1686	{ 0 },
1687	{ 0,1 },
1688	{ 0,2,1 },
1689	{ 0,1,2,3 },
1690	{ 0,4,1,2,3 },
1691	{ 0,4,1,2,3,5 },
1692	{ 0,4,1,2,3,5,6 },
1693	{ 0,6,1,2,3,4,5,7 },
1694	};
1695
1696	int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1697	const uint8_t **pp, const uint8_t *desc_list_end,
1698	Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1699	MpegTSContext *ts)
1700	{
1701	const uint8_t *desc_end;
1702	int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1703	char language[252];
1704	int i;
1705
1706	desc_tag = get8(pp, desc_list_end);
1707	if (desc_tag < 0)
1708	return AVERROR_INVALIDDATA;
1709	desc_len = get8(pp, desc_list_end);
1710	if (desc_len < 0)
1711	return AVERROR_INVALIDDATA;
1712	desc_end = *pp + desc_len;
1713	if (desc_end > desc_list_end)
1714	return AVERROR_INVALIDDATA;
1715
1716	av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1717
1718	if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) &&
1719	stream_type == STREAM_TYPE_PRIVATE_DATA)
1720	mpegts_find_stream_type(st, desc_tag, DESC_types);
1721
1722	switch (desc_tag) {
1723	case 0x1E: /* SL descriptor */
1724	desc_es_id = get16(pp, desc_end);
1725	if (desc_es_id < 0)
1726	break;
1727	if (ts && ts->pids[pid])
1728	ts->pids[pid]->es_id = desc_es_id;
1729	for (i = 0; i < mp4_descr_count; i++)
1730	if (mp4_descr[i].dec_config_descr_len &&
1731	mp4_descr[i].es_id == desc_es_id) {
1732	AVIOContext pb;
1733	ffio_init_context(&pb, mp4_descr[i].dec_config_descr,
1734	mp4_descr[i].dec_config_descr_len, 0,
1735	NULL, NULL, NULL, NULL);
1736	ff_mp4_read_dec_config_descr(fc, st, &pb);
1737	if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1738	st->codecpar->extradata_size > 0) {
1739	st->need_parsing = 0;
1740	st->internal->need_context_update = 1;
1741	}
1742	if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1743	mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1744	}
1745	break;
1746	case 0x1F: /* FMC descriptor */
1747	if (get16(pp, desc_end) < 0)
1748	break;
1749	if (mp4_descr_count > 0 &&
1750	(st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1751	(st->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1752	st->request_probe > 0) &&
1753	mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1754	AVIOContext pb;
1755	ffio_init_context(&pb, mp4_descr->dec_config_descr,
1756	mp4_descr->dec_config_descr_len, 0,
1757	NULL, NULL, NULL, NULL);
1758	ff_mp4_read_dec_config_descr(fc, st, &pb);
1759	if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1760	st->codecpar->extradata_size > 0) {
1761	st->request_probe = st->need_parsing = 0;
1762	st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1763	st->internal->need_context_update = 1;
1764	}
1765	}
1766	break;
1767	case 0x56: /* DVB teletext descriptor */
1768	{
1769	uint8_t *extradata = NULL;
1770	int language_count = desc_len / 5;
1771
1772	if (desc_len > 0 && desc_len % 5 != 0)
1773	return AVERROR_INVALIDDATA;
1774
1775	if (language_count > 0) {
1776	/* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1777	av_assert0(language_count <= sizeof(language) / 4);
1778
1779	if (st->codecpar->extradata == NULL) {
1780	if (ff_alloc_extradata(st->codecpar, language_count * 2)) {
1781	return AVERROR(ENOMEM);
1782	}
1783	}
1784
1785	if (st->codecpar->extradata_size < language_count * 2)
1786	return AVERROR_INVALIDDATA;
1787
1788	extradata = st->codecpar->extradata;
1789
1790	for (i = 0; i < language_count; i++) {
1791	language[i * 4 + 0] = get8(pp, desc_end);
1792	language[i * 4 + 1] = get8(pp, desc_end);
1793	language[i * 4 + 2] = get8(pp, desc_end);
1794	language[i * 4 + 3] = ',';
1795
1796	memcpy(extradata, *pp, 2);
1797	extradata += 2;
1798
1799	*pp += 2;
1800	}
1801
1802	language[i * 4 - 1] = 0;
1803	av_dict_set(&st->metadata, "language", language, 0);
1804	st->internal->need_context_update = 1;
1805	}
1806	}
1807	break;
1808	case 0x59: /* subtitling descriptor */
1809	{
1810	/* 8 bytes per DVB subtitle substream data:
1811	* ISO_639_language_code (3 bytes),
1812	* subtitling_type (1 byte),
1813	* composition_page_id (2 bytes),
1814	* ancillary_page_id (2 bytes) */
1815	int language_count = desc_len / 8;
1816
1817	if (desc_len > 0 && desc_len % 8 != 0)
1818	return AVERROR_INVALIDDATA;
1819
1820	if (language_count > 1) {
1821	avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1822	}
1823
1824	if (language_count > 0) {
1825	uint8_t *extradata;
1826
1827	/* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1828	av_assert0(language_count <= sizeof(language) / 4);
1829
1830	if (st->codecpar->extradata == NULL) {
1831	if (ff_alloc_extradata(st->codecpar, language_count * 5)) {
1832	return AVERROR(ENOMEM);
1833	}
1834	}
1835
1836	if (st->codecpar->extradata_size < language_count * 5)
1837	return AVERROR_INVALIDDATA;
1838
1839	extradata = st->codecpar->extradata;
1840
1841	for (i = 0; i < language_count; i++) {
1842	language[i * 4 + 0] = get8(pp, desc_end);
1843	language[i * 4 + 1] = get8(pp, desc_end);
1844	language[i * 4 + 2] = get8(pp, desc_end);
1845	language[i * 4 + 3] = ',';
1846
1847	/* hearing impaired subtitles detection using subtitling_type */
1848	switch (*pp[0]) {
1849	case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1850	case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1851	case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1852	case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1853	case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1854	case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1855	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1856	break;
1857	}
1858
1859	extradata[4] = get8(pp, desc_end); /* subtitling_type */
1860	memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1861	extradata += 5;
1862
1863	*pp += 4;
1864	}
1865
1866	language[i * 4 - 1] = 0;
1867	av_dict_set(&st->metadata, "language", language, 0);
1868	st->internal->need_context_update = 1;
1869	}
1870	}
1871	break;
1872	case 0x0a: /* ISO 639 language descriptor */
1873	for (i = 0; i + 4 <= desc_len; i += 4) {
1874	language[i + 0] = get8(pp, desc_end);
1875	language[i + 1] = get8(pp, desc_end);
1876	language[i + 2] = get8(pp, desc_end);
1877	language[i + 3] = ',';
1878	switch (get8(pp, desc_end)) {
1879	case 0x01:
1880	st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1881	break;
1882	case 0x02:
1883	st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1884	break;
1885	case 0x03:
1886	st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
1887	break;
1888	}
1889	}
1890	if (i && language[0]) {
1891	language[i - 1] = 0;
1892	av_dict_set(&st->metadata, "language", language, 0);
1893	}
1894	break;
1895	case 0x05: /* registration descriptor */
1896	st->codecpar->codec_tag = bytestream_get_le32(pp);
1897	av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
1898	if (st->codecpar->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) {
1899	mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
1900	if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
1901	st->request_probe = 50;
1902	}
1903	break;
1904	case 0x52: /* stream identifier descriptor */
1905	st->stream_identifier = 1 + get8(pp, desc_end);
1906	break;
1907	case 0x26: /* metadata descriptor */
1908	if (get16(pp, desc_end) == 0xFFFF)
1909	*pp += 4;
1910	if (get8(pp, desc_end) == 0xFF) {
1911	st->codecpar->codec_tag = bytestream_get_le32(pp);
1912	if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
1913	mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
1914	}
1915	break;
1916	case 0x7f: /* DVB extension descriptor */
1917	ext_desc_tag = get8(pp, desc_end);
1918	if (ext_desc_tag < 0)
1919	return AVERROR_INVALIDDATA;
1920	if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
1921	ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
1922	if (!st->codecpar->extradata) {
1923	st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
1924	AV_INPUT_BUFFER_PADDING_SIZE);
1925	if (!st->codecpar->extradata)
1926	return AVERROR(ENOMEM);
1927
1928	st->codecpar->extradata_size = sizeof(opus_default_extradata);
1929	memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
1930
1931	channel_config_code = get8(pp, desc_end);
1932	if (channel_config_code < 0)
1933	return AVERROR_INVALIDDATA;
1934	if (channel_config_code <= 0x8) {
1935	st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
1936	st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
1937	st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
1938	st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
1939	memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
1940	} else {
1941	avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
1942	}
1943	st->need_parsing = AVSTREAM_PARSE_FULL;
1944	st->internal->need_context_update = 1;
1945	}
1946	}
1947	break;
1948	default:
1949	break;
1950	}
1951	*pp = desc_end;
1952	return 0;
1953	}
1954
1955	static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
1956	{
1957	return !(stream_type == 0x13 ||
1958	(stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
1959	}
1960
1961	static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
1962	{
1963	MpegTSContext *ts = filter->u.section_filter.opaque;
1964	MpegTSSectionFilter *tssf = &filter->u.section_filter;
1965	SectionHeader h1, *h = &h1;
1966	PESContext *pes;
1967	AVStream *st;
1968	const uint8_t *p, *p_end, *desc_list_end;
1969	int program_info_length, pcr_pid, pid, stream_type;
1970	int desc_list_len;
1971	uint32_t prog_reg_desc = 0; /* registration descriptor */
1972
1973	int mp4_descr_count = 0;
1974	Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1975	int i;
1976
1977	av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
1978	hex_dump_debug(ts->stream, section, section_len);
1979
1980	p_end = section + section_len - 4;
1981	p = section;
1982	if (parse_section_header(h, &p, p_end) < 0)
1983	return;
1984	if (skip_identical(h, tssf))
1985	return;
1986
1987	av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
1988	h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
1989
1990	if (h->tid != PMT_TID)
1991	return;
1992	if (!ts->scan_all_pmts && ts->skip_changes)
1993	return;
1994
1995	if (!ts->skip_clear)
1996	clear_program(ts, h->id);
1997
1998	pcr_pid = get16(&p, p_end);
1999	if (pcr_pid < 0)
2000	return;
2001	pcr_pid &= 0x1fff;
2002	add_pid_to_pmt(ts, h->id, pcr_pid);
2003	set_pcr_pid(ts->stream, h->id, pcr_pid);
2004
2005	av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2006
2007	program_info_length = get16(&p, p_end);
2008	if (program_info_length < 0)
2009	return;
2010	program_info_length &= 0xfff;
2011	while (program_info_length >= 2) {
2012	uint8_t tag, len;
2013	tag = get8(&p, p_end);
2014	len = get8(&p, p_end);
2015
2016	av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2017
2018	if (len > program_info_length - 2)
2019	// something else is broken, exit the program_descriptors_loop
2020	break;
2021	program_info_length -= len + 2;
2022	if (tag == 0x1d) { // IOD descriptor
2023	get8(&p, p_end); // scope
2024	get8(&p, p_end); // label
2025	len -= 2;
2026	mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2027	&mp4_descr_count, MAX_MP4_DESCR_COUNT);
2028	} else if (tag == 0x05 && len >= 4) { // registration descriptor
2029	prog_reg_desc = bytestream_get_le32(&p);
2030	len -= 4;
2031	}
2032	p += len;
2033	}
2034	p += program_info_length;
2035	if (p >= p_end)
2036	goto out;
2037
2038	// stop parsing after pmt, we found header
2039	if (!ts->stream->nb_streams)
2040	ts->stop_parse = 2;
2041
2042	set_pmt_found(ts, h->id);
2043
2044
2045	for (;;) {
2046	st = 0;
2047	pes = NULL;
2048	stream_type = get8(&p, p_end);
2049	if (stream_type < 0)
2050	break;
2051	pid = get16(&p, p_end);
2052	if (pid < 0)
2053	goto out;
2054	pid &= 0x1fff;
2055	if (pid == ts->current_pid)
2056	goto out;
2057
2058	/* now create stream */
2059	if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2060	pes = ts->pids[pid]->u.pes_filter.opaque;
2061	if (!pes->st) {
2062	pes->st = avformat_new_stream(pes->stream, NULL);
2063	if (!pes->st)
2064	goto out;
2065	pes->st->id = pes->pid;
2066	}
2067	st = pes->st;
2068	} else if (is_pes_stream(stream_type, prog_reg_desc)) {
2069	if (ts->pids[pid])
2070	mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2071	pes = add_pes_stream(ts, pid, pcr_pid);
2072	if (pes) {
2073	st = avformat_new_stream(pes->stream, NULL);
2074	if (!st)
2075	goto out;
2076	st->id = pes->pid;
2077	}
2078	} else {
2079	int idx = ff_find_stream_index(ts->stream, pid);
2080	if (idx >= 0) {
2081	st = ts->stream->streams[idx];
2082	} else {
2083	st = avformat_new_stream(ts->stream, NULL);
2084	if (!st)
2085	goto out;
2086	st->id = pid;
2087	st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2088	if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2089	mpegts_find_stream_type(st, stream_type, SCTE_types);
2090	mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2091	}
2092	}
2093	}
2094
2095	if (!st)
2096	goto out;
2097
2098	if (pes && !pes->stream_type)
2099	mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2100
2101	add_pid_to_pmt(ts, h->id, pid);
2102
2103	av_program_add_stream_index(ts->stream, h->id, st->index);
2104
2105	desc_list_len = get16(&p, p_end);
2106	if (desc_list_len < 0)
2107	goto out;
2108	desc_list_len &= 0xfff;
2109	desc_list_end = p + desc_list_len;
2110	if (desc_list_end > p_end)
2111	goto out;
2112	for (;;) {
2113	if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2114	desc_list_end, mp4_descr,
2115	mp4_descr_count, pid, ts) < 0)
2116	break;
2117
2118	if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2119	(stream_type == 0x83 || stream_type == 0x81) && pes->sub_st) {
2120	av_program_add_stream_index(ts->stream, h->id,
2121	pes->sub_st->index);
2122	pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2123	}
2124	}
2125	p = desc_list_end;
2126	}
2127
2128	if (!ts->pids[pcr_pid])
2129	mpegts_open_pcr_filter(ts, pcr_pid);
2130
2131	out:
2132	for (i = 0; i < mp4_descr_count; i++)
2133	av_free(mp4_descr[i].dec_config_descr);
2134	}
2135
2136	static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2137	{
2138	MpegTSContext *ts = filter->u.section_filter.opaque;
2139	MpegTSSectionFilter *tssf = &filter->u.section_filter;
2140	SectionHeader h1, *h = &h1;
2141	const uint8_t *p, *p_end;
2142	int sid, pmt_pid;
2143	AVProgram *program;
2144
2145	av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2146	hex_dump_debug(ts->stream, section, section_len);
2147
2148	p_end = section + section_len - 4;
2149	p = section;
2150	if (parse_section_header(h, &p, p_end) < 0)
2151	return;
2152	if (h->tid != PAT_TID)
2153	return;
2154	if (ts->skip_changes)
2155	return;
2156
2157	if (skip_identical(h, tssf))
2158	return;
2159	ts->stream->ts_id = h->id;
2160
2161	clear_programs(ts);
2162	for (;;) {
2163	sid = get16(&p, p_end);
2164	if (sid < 0)
2165	break;
2166	pmt_pid = get16(&p, p_end);
2167	if (pmt_pid < 0)
2168	break;
2169	pmt_pid &= 0x1fff;
2170
2171	if (pmt_pid == ts->current_pid)
2172	break;
2173
2174	av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2175
2176	if (sid == 0x0000) {
2177	/* NIT info */
2178	} else {
2179	MpegTSFilter *fil = ts->pids[pmt_pid];
2180	program = av_new_program(ts->stream, sid);
2181	if (program) {
2182	program->program_num = sid;
2183	program->pmt_pid = pmt_pid;
2184	}
2185	if (fil)
2186	if ( fil->type != MPEGTS_SECTION
2187	|| fil->pid != pmt_pid
2188	|| fil->u.section_filter.section_cb != pmt_cb)
2189	mpegts_close_filter(ts, ts->pids[pmt_pid]);
2190
2191	if (!ts->pids[pmt_pid])
2192	mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2193	add_pat_entry(ts, sid);
2194	add_pid_to_pmt(ts, sid, 0); // add pat pid to program
2195	add_pid_to_pmt(ts, sid, pmt_pid);
2196	}
2197	}
2198
2199	if (sid < 0) {
2200	int i,j;
2201	for (j=0; j<ts->stream->nb_programs; j++) {
2202	for (i = 0; i < ts->nb_prg; i++)
2203	if (ts->prg[i].id == ts->stream->programs[j]->id)
2204	break;
2205	if (i==ts->nb_prg && !ts->skip_clear)
2206	clear_avprogram(ts, ts->stream->programs[j]->id);
2207	}
2208	}
2209	}
2210
2211	static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2212	{
2213	MpegTSContext *ts = filter->u.section_filter.opaque;
2214	MpegTSSectionFilter *tssf = &filter->u.section_filter;
2215	SectionHeader h1, *h = &h1;
2216	const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2217	int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2218	char *name, *provider_name;
2219
2220	av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2221	hex_dump_debug(ts->stream, section, section_len);
2222
2223	p_end = section + section_len - 4;
2224	p = section;
2225	if (parse_section_header(h, &p, p_end) < 0)
2226	return;
2227	if (h->tid != SDT_TID)
2228	return;
2229	if (ts->skip_changes)
2230	return;
2231	if (skip_identical(h, tssf))
2232	return;
2233
2234	onid = get16(&p, p_end);
2235	if (onid < 0)
2236	return;
2237	val = get8(&p, p_end);
2238	if (val < 0)
2239	return;
2240	for (;;) {
2241	sid = get16(&p, p_end);
2242	if (sid < 0)
2243	break;
2244	val = get8(&p, p_end);
2245	if (val < 0)
2246	break;
2247	desc_list_len = get16(&p, p_end);
2248	if (desc_list_len < 0)
2249	break;
2250	desc_list_len &= 0xfff;
2251	desc_list_end = p + desc_list_len;
2252	if (desc_list_end > p_end)
2253	break;
2254	for (;;) {
2255	desc_tag = get8(&p, desc_list_end);
2256	if (desc_tag < 0)
2257	break;
2258	desc_len = get8(&p, desc_list_end);
2259	desc_end = p + desc_len;
2260	if (desc_len < 0 || desc_end > desc_list_end)
2261	break;
2262
2263	av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2264	desc_tag, desc_len);
2265
2266	switch (desc_tag) {
2267	case 0x48:
2268	service_type = get8(&p, p_end);
2269	if (service_type < 0)
2270	break;
2271	provider_name = getstr8(&p, p_end);
2272	if (!provider_name)
2273	break;
2274	name = getstr8(&p, p_end);
2275	if (name) {
2276	AVProgram *program = av_new_program(ts->stream, sid);
2277	if (program) {
2278	av_dict_set(&program->metadata, "service_name", name, 0);
2279	av_dict_set(&program->metadata, "service_provider",
2280	provider_name, 0);
2281	}
2282	}
2283	av_free(name);
2284	av_free(provider_name);
2285	break;
2286	default:
2287	break;
2288	}
2289	p = desc_end;
2290	}
2291	p = desc_list_end;
2292	}
2293	}
2294
2295	static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2296	const uint8_t *packet);
2297
2298	/* handle one TS packet */
2299	static int handle_packet(MpegTSContext *ts, const uint8_t *packet)
2300	{
2301	MpegTSFilter *tss;
2302	int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2303	has_adaptation, has_payload;
2304	const uint8_t *p, *p_end;
2305	int64_t pos;
2306
2307	pid = AV_RB16(packet + 1) & 0x1fff;
2308	if (pid && discard_pid(ts, pid))
2309	return 0;
2310	is_start = packet[1] & 0x40;
2311	tss = ts->pids[pid];
2312	if (ts->auto_guess && !tss && is_start) {
2313	add_pes_stream(ts, pid, -1);
2314	tss = ts->pids[pid];
2315	}
2316	if (!tss)
2317	return 0;
2318	ts->current_pid = pid;
2319
2320	afc = (packet[3] >> 4) & 3;
2321	if (afc == 0) /* reserved value */
2322	return 0;
2323	has_adaptation = afc & 2;
2324	has_payload = afc & 1;
2325	is_discontinuity = has_adaptation &&
2326	packet[4] != 0 && /* with length > 0 */
2327	(packet[5] & 0x80); /* and discontinuity indicated */
2328
2329	/* continuity check (currently not used) */
2330	cc = (packet[3] & 0xf);
2331	expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2332	cc_ok = pid == 0x1FFF || // null packet PID
2333	is_discontinuity ||
2334	tss->last_cc < 0 ||
2335	expected_cc == cc;
2336
2337	tss->last_cc = cc;
2338	if (!cc_ok) {
2339	av_log(ts->stream, AV_LOG_DEBUG,
2340	"Continuity check failed for pid %d expected %d got %d\n",
2341	pid, expected_cc, cc);
2342	if (tss->type == MPEGTS_PES) {
2343	PESContext *pc = tss->u.pes_filter.opaque;
2344	pc->flags |= AV_PKT_FLAG_CORRUPT;
2345	}
2346	}
2347
2348	p = packet + 4;
2349	if (has_adaptation) {
2350	int64_t pcr_h;
2351	int pcr_l;
2352	if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2353	tss->last_pcr = pcr_h * 300 + pcr_l;
2354	/* skip adaptation field */
2355	p += p[0] + 1;
2356	}
2357	/* if past the end of packet, ignore */
2358	p_end = packet + TS_PACKET_SIZE;
2359	if (p >= p_end || !has_payload)
2360	return 0;
2361
2362	pos = avio_tell(ts->stream->pb);
2363	if (pos >= 0) {
2364	av_assert0(pos >= TS_PACKET_SIZE);
2365	ts->pos47_full = pos - TS_PACKET_SIZE;
2366	}
2367
2368	if (tss->type == MPEGTS_SECTION) {
2369	if (is_start) {
2370	/* pointer field present */
2371	len = *p++;
2372	if (len > p_end - p)
2373	return 0;
2374	if (len && cc_ok) {
2375	/* write remaining section bytes */
2376	write_section_data(ts, tss,
2377	p, len, 0);
2378	/* check whether filter has been closed */
2379	if (!ts->pids[pid])
2380	return 0;
2381	}
2382	p += len;
2383	if (p < p_end) {
2384	write_section_data(ts, tss,
2385	p, p_end - p, 1);
2386	}
2387	} else {
2388	if (cc_ok) {
2389	write_section_data(ts, tss,
2390	p, p_end - p, 0);
2391	}
2392	}
2393
2394	// stop find_stream_info from waiting for more streams
2395	// when all programs have received a PMT
2396	if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2397	int i;
2398	for (i = 0; i < ts->nb_prg; i++) {
2399	if (!ts->prg[i].pmt_found)
2400	break;
2401	}
2402	if (i == ts->nb_prg && ts->nb_prg > 0) {
2403	int types = 0;
2404	for (i = 0; i < ts->stream->nb_streams; i++) {
2405	AVStream *st = ts->stream->streams[i];
2406	if (st->codecpar->codec_type >= 0)
2407	types |= 1<<st->codecpar->codec_type;
2408	}
2409	if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) {
2410	av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2411	ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2412	}
2413	}
2414	}
2415
2416	} else {
2417	int ret;
2418	// Note: The position here points actually behind the current packet.
2419	if (tss->type == MPEGTS_PES) {
2420	if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2421	pos - ts->raw_packet_size)) < 0)
2422	return ret;
2423	}
2424	}
2425
2426	return 0;
2427	}
2428
2429	static void reanalyze(MpegTSContext *ts) {
2430	AVIOContext *pb = ts->stream->pb;
2431	int64_t pos = avio_tell(pb);
2432	if (pos < 0)
2433	return;
2434	pos -= ts->pos47_full;
2435	if (pos == TS_PACKET_SIZE) {
2436	ts->size_stat[0] ++;
2437	} else if (pos == TS_DVHS_PACKET_SIZE) {
2438	ts->size_stat[1] ++;
2439	} else if (pos == TS_FEC_PACKET_SIZE) {
2440	ts->size_stat[2] ++;
2441	}
2442
2443	ts->size_stat_count ++;
2444	if (ts->size_stat_count > SIZE_STAT_THRESHOLD) {
2445	int newsize = 0;
2446	if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) {
2447	newsize = TS_PACKET_SIZE;
2448	} else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) {
2449	newsize = TS_DVHS_PACKET_SIZE;
2450	} else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) {
2451	newsize = TS_FEC_PACKET_SIZE;
2452	}
2453	if (newsize && newsize != ts->raw_packet_size) {
2454	av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize);
2455	ts->raw_packet_size = newsize;
2456	}
2457	ts->size_stat_count = 0;
2458	memset(ts->size_stat, 0, sizeof(ts->size_stat));
2459	}
2460	}
2461
2462	/* XXX: try to find a better synchro over several packets (use
2463	* get_packet_size() ?) */
2464	static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2465	{
2466	MpegTSContext *ts = s->priv_data;
2467	AVIOContext *pb = s->pb;
2468	int c, i;
2469	uint64_t pos = avio_tell(pb);
2470
2471	avio_seek(pb, -FFMIN(seekback, pos), SEEK_CUR);
2472
2473	//Special case for files like 01c56b0dc1.ts
2474	if (current_packet[0] == 0x80 && current_packet[12] == 0x47) {
2475	avio_seek(pb, 12, SEEK_CUR);
2476	return 0;
2477	}
2478
2479	for (i = 0; i < ts->resync_size; i++) {
2480	c = avio_r8(pb);
2481	if (avio_feof(pb))
2482	return AVERROR_EOF;
2483	if (c == 0x47) {
2484	avio_seek(pb, -1, SEEK_CUR);
2485	reanalyze(s->priv_data);
2486	return 0;
2487	}
2488	}
2489	av_log(s, AV_LOG_ERROR,
2490	"max resync size reached, could not find sync byte\n");
2491	/* no sync found */
2492	return AVERROR_INVALIDDATA;
2493	}
2494
2495	/* return AVERROR_something if error or EOF. Return 0 if OK. */
2496	static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2497	const uint8_t **data)
2498	{
2499	AVIOContext *pb = s->pb;
2500	int len;
2501
2502	for (;;) {
2503	len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2504	if (len != TS_PACKET_SIZE)
2505	return len < 0 ? len : AVERROR_EOF;
2506	/* check packet sync byte */
2507	if ((*data)[0] != 0x47) {
2508	/* find a new packet start */
2509
2510	if (mpegts_resync(s, raw_packet_size, *data) < 0)
2511	return AVERROR(EAGAIN);
2512	else
2513	continue;
2514	} else {
2515	break;
2516	}
2517	}
2518	return 0;
2519	}
2520
2521	static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2522	{
2523	AVIOContext *pb = s->pb;
2524	int skip = raw_packet_size - TS_PACKET_SIZE;
2525	if (skip > 0)
2526	avio_skip(pb, skip);
2527	}
2528
2529	static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2530	{
2531	AVFormatContext *s = ts->stream;
2532	uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2533	const uint8_t *data;
2534	int64_t packet_num;
2535	int ret = 0;
2536
2537	if (avio_tell(s->pb) != ts->last_pos) {
2538	int i;
2539	av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2540	/* seek detected, flush pes buffer */
2541	for (i = 0; i < NB_PID_MAX; i++) {
2542	if (ts->pids[i]) {
2543	if (ts->pids[i]->type == MPEGTS_PES) {
2544	PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2545	av_buffer_unref(&pes->buffer);
2546	pes->data_index = 0;
2547	pes->state = MPEGTS_SKIP; /* skip until pes header */
2548	} else if (ts->pids[i]->type == MPEGTS_SECTION) {
2549	ts->pids[i]->u.section_filter.last_ver = -1;
2550	}
2551	ts->pids[i]->last_cc = -1;
2552	ts->pids[i]->last_pcr = -1;
2553	}
2554	}
2555	}
2556
2557	ts->stop_parse = 0;
2558	packet_num = 0;
2559	memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
2560	for (;;) {
2561	packet_num++;
2562	if (nb_packets != 0 && packet_num >= nb_packets ||
2563	ts->stop_parse > 1) {
2564	ret = AVERROR(EAGAIN);
2565	break;
2566	}
2567	if (ts->stop_parse > 0)
2568	break;
2569
2570	ret = read_packet(s, packet, ts->raw_packet_size, &data);
2571	if (ret != 0)
2572	break;
2573	ret = handle_packet(ts, data);
2574	finished_reading_packet(s, ts->raw_packet_size);
2575	if (ret != 0)
2576	break;
2577	}
2578	ts->last_pos = avio_tell(s->pb);
2579	return ret;
2580	}
2581
2582	static int mpegts_probe(AVProbeData *p)
2583	{
2584	const int size = p->buf_size;
2585	int maxscore = 0;
2586	int sumscore = 0;
2587	int i;
2588	int check_count = size / TS_FEC_PACKET_SIZE;
2589	#define CHECK_COUNT 10
2590	#define CHECK_BLOCK 100
2591
2592	if (!check_count)
2593	return 0;
2594
2595	for (i = 0; i<check_count; i+=CHECK_BLOCK) {
2596	int left = FFMIN(check_count - i, CHECK_BLOCK);
2597	int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
2598	int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
2599	int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
2600	score = FFMAX3(score, dvhs_score, fec_score);
2601	sumscore += score;
2602	maxscore = FFMAX(maxscore, score);
2603	}
2604
2605	sumscore = sumscore * CHECK_COUNT / check_count;
2606	maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
2607
2608	ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
2609
2610	if (check_count > CHECK_COUNT && sumscore > 6) {
2611	return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
2612	} else if (check_count >= CHECK_COUNT && sumscore > 6) {
2613	return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2614	} else if (check_count >= CHECK_COUNT && maxscore > 6) {
2615	return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
2616	} else if (sumscore > 6) {
2617	return 2;
2618	} else {
2619	return 0;
2620	}
2621	}
2622
2623	/* return the 90kHz PCR and the extension for the 27MHz PCR. return
2624	* (-1) if not available */
2625	static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
2626	{
2627	int afc, len, flags;
2628	const uint8_t *p;
2629	unsigned int v;
2630
2631	afc = (packet[3] >> 4) & 3;
2632	if (afc <= 1)
2633	return AVERROR_INVALIDDATA;
2634	p = packet + 4;
2635	len = p[0];
2636	p++;
2637	if (len == 0)
2638	return AVERROR_INVALIDDATA;
2639	flags = *p++;
2640	len--;
2641	if (!(flags & 0x10))
2642	return AVERROR_INVALIDDATA;
2643	if (len < 6)
2644	return AVERROR_INVALIDDATA;
2645	v = AV_RB32(p);
2646	*ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
2647	*ppcr_low = ((p[4] & 1) << 8) | p[5];
2648	return 0;
2649	}
2650
2651	static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
2652
2653	/* NOTE: We attempt to seek on non-seekable files as well, as the
2654	* probe buffer usually is big enough. Only warn if the seek failed
2655	* on files where the seek should work. */
2656	if (avio_seek(pb, pos, SEEK_SET) < 0)
2657	av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
2658	}
2659
2660	static int mpegts_read_header(AVFormatContext *s)
2661	{
2662	MpegTSContext *ts = s->priv_data;
2663	AVIOContext *pb = s->pb;
2664	uint8_t buf[8 * 1024] = {0};
2665	int len;
2666	int64_t pos, probesize = s->probesize;
2667
2668	if (ffio_ensure_seekback(pb, probesize) < 0)
2669	av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
2670
2671	/* read the first 8192 bytes to get packet size */
2672	pos = avio_tell(pb);
2673	len = avio_read(pb, buf, sizeof(buf));
2674	ts->raw_packet_size = get_packet_size(buf, len);
2675	if (ts->raw_packet_size <= 0) {
2676	av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
2677	ts->raw_packet_size = TS_PACKET_SIZE;
2678	}
2679	ts->stream = s;
2680	ts->auto_guess = 0;
2681
2682	if (s->iformat == &ff_mpegts_demuxer) {
2683	/* normal demux */
2684
2685	/* first do a scan to get all the services */
2686	seek_back(s, pb, pos);
2687
2688	mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2689
2690	mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2691
2692	handle_packets(ts, probesize / ts->raw_packet_size);
2693	/* if could not find service, enable auto_guess */
2694
2695	ts->auto_guess = 1;
2696
2697	av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
2698
2699	s->ctx_flags |= AVFMTCTX_NOHEADER;
2700	} else {
2701	AVStream *st;
2702	int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
2703	int64_t pcrs[2], pcr_h;
2704	int packet_count[2];
2705	uint8_t packet[TS_PACKET_SIZE];
2706	const uint8_t *data;
2707
2708	/* only read packets */
2709
2710	st = avformat_new_stream(s, NULL);
2711	if (!st)
2712	return AVERROR(ENOMEM);
2713	avpriv_set_pts_info(st, 60, 1, 27000000);
2714	st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2715	st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
2716
2717	/* we iterate until we find two PCRs to estimate the bitrate */
2718	pcr_pid = -1;
2719	nb_pcrs = 0;
2720	nb_packets = 0;
2721	for (;;) {
2722	ret = read_packet(s, packet, ts->raw_packet_size, &data);
2723	if (ret < 0)
2724	return ret;
2725	pid = AV_RB16(data + 1) & 0x1fff;
2726	if ((pcr_pid == -1 || pcr_pid == pid) &&
2727	parse_pcr(&pcr_h, &pcr_l, data) == 0) {
2728	finished_reading_packet(s, ts->raw_packet_size);
2729	pcr_pid = pid;
2730	packet_count[nb_pcrs] = nb_packets;
2731	pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
2732	nb_pcrs++;
2733	if (nb_pcrs >= 2) {
2734	if (pcrs[1] - pcrs[0] > 0) {
2735	/* the difference needs to be positive to make sense for bitrate computation */
2736	break;
2737	} else {
2738	av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
2739	pcrs[0] = pcrs[1];
2740	packet_count[0] = packet_count[1];
2741	nb_pcrs--;
2742	}
2743	}
2744	} else {
2745	finished_reading_packet(s, ts->raw_packet_size);
2746	}
2747	nb_packets++;
2748	}
2749
2750	/* NOTE1: the bitrate is computed without the FEC */
2751	/* NOTE2: it is only the bitrate of the start of the stream */
2752	ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]);
2753	ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0];
2754	s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
2755	st->codecpar->bit_rate = s->bit_rate;
2756	st->start_time = ts->cur_pcr;
2757	av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%d\n",
2758	st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
2759	}
2760
2761	seek_back(s, pb, pos);
2762	return 0;
2763	}
2764
2765	#define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
2766
2767	static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
2768	{
2769	MpegTSContext *ts = s->priv_data;
2770	int ret, i;
2771	int64_t pcr_h, next_pcr_h, pos;
2772	int pcr_l, next_pcr_l;
2773	uint8_t pcr_buf[12];
2774	const uint8_t *data;
2775
2776	if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
2777	return AVERROR(ENOMEM);
2778	ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
2779	pkt->pos = avio_tell(s->pb);
2780	if (ret < 0) {
2781	av_packet_unref(pkt);
2782	return ret;
2783	}
2784	if (data != pkt->data)
2785	memcpy(pkt->data, data, ts->raw_packet_size);
2786	finished_reading_packet(s, ts->raw_packet_size);
2787	if (ts->mpeg2ts_compute_pcr) {
2788	/* compute exact PCR for each packet */
2789	if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
2790	/* we read the next PCR (XXX: optimize it by using a bigger buffer */
2791	pos = avio_tell(s->pb);
2792	for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
2793	avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
2794	avio_read(s->pb, pcr_buf, 12);
2795	if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
2796	/* XXX: not precise enough */
2797	ts->pcr_incr =
2798	((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
2799	(i + 1);
2800	break;
2801	}
2802	}
2803	avio_seek(s->pb, pos, SEEK_SET);
2804	/* no next PCR found: we use previous increment */
2805	ts->cur_pcr = pcr_h * 300 + pcr_l;
2806	}
2807	pkt->pts = ts->cur_pcr;
2808	pkt->duration = ts->pcr_incr;
2809	ts->cur_pcr += ts->pcr_incr;
2810	}
2811	pkt->stream_index = 0;
2812	return 0;
2813	}
2814
2815	static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
2816	{
2817	MpegTSContext *ts = s->priv_data;
2818	int ret, i;
2819
2820	pkt->size = -1;
2821	ts->pkt = pkt;
2822	ret = handle_packets(ts, 0);
2823	if (ret < 0) {
2824	av_packet_unref(ts->pkt);
2825	/* flush pes data left */
2826	for (i = 0; i < NB_PID_MAX; i++)
2827	if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
2828	PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2829	if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
2830	ret = new_pes_packet(pes, pkt);
2831	if (ret < 0)
2832	return ret;
2833	pes->state = MPEGTS_SKIP;
2834	ret = 0;
2835	break;
2836	}
2837	}
2838	}
2839
2840	if (!ret && pkt->size < 0)
2841	ret = AVERROR_INVALIDDATA;
2842	return ret;
2843	}
2844
2845	static void mpegts_free(MpegTSContext *ts)
2846	{
2847	int i;
2848
2849	clear_programs(ts);
2850
2851	for (i = 0; i < NB_PID_MAX; i++)
2852	if (ts->pids[i])
2853	mpegts_close_filter(ts, ts->pids[i]);
2854	}
2855
2856	static int mpegts_read_close(AVFormatContext *s)
2857	{
2858	MpegTSContext *ts = s->priv_data;
2859	mpegts_free(ts);
2860	return 0;
2861	}
2862
2863	static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
2864	int64_t *ppos, int64_t pos_limit)
2865	{
2866	MpegTSContext *ts = s->priv_data;
2867	int64_t pos, timestamp;
2868	uint8_t buf[TS_PACKET_SIZE];
2869	int pcr_l, pcr_pid =
2870	((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
2871	int pos47 = ts->pos47_full % ts->raw_packet_size;
2872	pos =
2873	((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
2874	ts->raw_packet_size + pos47;
2875	while(pos < pos_limit) {
2876	if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2877	return AV_NOPTS_VALUE;
2878	if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
2879	return AV_NOPTS_VALUE;
2880	if (buf[0] != 0x47) {
2881	if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
2882	return AV_NOPTS_VALUE;
2883	pos = avio_tell(s->pb);
2884	continue;
2885	}
2886	if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
2887	parse_pcr(&timestamp, &pcr_l, buf) == 0) {
2888	*ppos = pos;
2889	return timestamp;
2890	}
2891	pos += ts->raw_packet_size;
2892	}
2893
2894	return AV_NOPTS_VALUE;
2895	}
2896
2897	static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
2898	int64_t *ppos, int64_t pos_limit)
2899	{
2900	MpegTSContext *ts = s->priv_data;
2901	int64_t pos;
2902	int pos47 = ts->pos47_full % ts->raw_packet_size;
2903	pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
2904	ff_read_frame_flush(s);
2905	if (avio_seek(s->pb, pos, SEEK_SET) < 0)
2906	return AV_NOPTS_VALUE;
2907	while(pos < pos_limit) {
2908	int ret;
2909	AVPacket pkt;
2910	av_init_packet(&pkt);
2911	ret = av_read_frame(s, &pkt);
2912	if (ret < 0)
2913	return AV_NOPTS_VALUE;
2914	if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) {
2915	ff_reduce_index(s, pkt.stream_index);
2916	av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
2917	if (pkt.stream_index == stream_index && pkt.pos >= *ppos) {
2918	int64_t dts = pkt.dts;
2919	*ppos = pkt.pos;
2920	av_packet_unref(&pkt);
2921	return dts;
2922	}
2923	}
2924	pos = pkt.pos;
2925	av_packet_unref(&pkt);
2926	}
2927
2928	return AV_NOPTS_VALUE;
2929	}
2930
2931	/**************************************************************/
2932	/* parsing functions - called from other demuxers such as RTP */
2933
2934	MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
2935	{
2936	MpegTSContext *ts;
2937
2938	ts = av_mallocz(sizeof(MpegTSContext));
2939	if (!ts)
2940	return NULL;
2941	/* no stream case, currently used by RTP */
2942	ts->raw_packet_size = TS_PACKET_SIZE;
2943	ts->stream = s;
2944	ts->auto_guess = 1;
2945	mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
2946	mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
2947
2948	return ts;
2949	}
2950
2951	/* return the consumed length if a packet was output, or -1 if no
2952	* packet is output */
2953	int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
2954	const uint8_t *buf, int len)
2955	{
2956	int len1;
2957
2958	len1 = len;
2959	ts->pkt = pkt;
2960	for (;;) {
2961	ts->stop_parse = 0;
2962	if (len < TS_PACKET_SIZE)
2963	return AVERROR_INVALIDDATA;
2964	if (buf[0] != 0x47) {
2965	buf++;
2966	len--;
2967	} else {
2968	handle_packet(ts, buf);
2969	buf += TS_PACKET_SIZE;
2970	len -= TS_PACKET_SIZE;
2971	if (ts->stop_parse == 1)
2972	break;
2973	}
2974	}
2975	return len1 - len;
2976	}
2977
2978	void avpriv_mpegts_parse_close(MpegTSContext *ts)
2979	{
2980	mpegts_free(ts);
2981	av_free(ts);
2982	}
2983
2984	AVInputFormat ff_mpegts_demuxer = {
2985	.name = "mpegts",
2986	.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2987	.priv_data_size = sizeof(MpegTSContext),
2988	.read_probe = mpegts_probe,
2989	.read_header = mpegts_read_header,
2990	.read_packet = mpegts_read_packet,
2991	.read_close = mpegts_read_close,
2992	.read_timestamp = mpegts_get_dts,
2993	.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
2994	.priv_class = &mpegts_class,
2995	};
2996
2997	AVInputFormat ff_mpegtsraw_demuxer = {
2998	.name = "mpegtsraw",
2999	.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3000	.priv_data_size = sizeof(MpegTSContext),
3001	.read_header = mpegts_read_header,
3002	.read_packet = mpegts_raw_read_packet,
3003	.read_close = mpegts_read_close,
3004	.read_timestamp = mpegts_get_dts,
3005	.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3006	.priv_class = &mpegtsraw_class,
3007	};
3008