FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2025-06-06 23:02:10
Exec Total Coverage
Lines: 1114 1943 57.3%
Functions: 49 70 70.0%
Branches: 611 1305 46.8%
Line Branch Exec Source
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 "config_components.h"
23
24 #include "libavutil/attributes_internal.h"
25 #include "libavutil/buffer.h"
26 #include "libavutil/crc.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/log.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/bytestream.h"
36 #include "libavcodec/defs.h"
37 #include "libavcodec/get_bits.h"
38 #include "libavcodec/opus/opus.h"
39 #include "avformat.h"
40 #include "mpegts.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "demux.h"
44 #include "mpeg.h"
45 #include "isom.h"
46 #if CONFIG_ICONV
47 #include <iconv.h>
48 #endif
49
50 /* maximum size in which we look for synchronization if
51 * synchronization is lost */
52 #define MAX_RESYNC_SIZE 65536
53
54 #define MAX_MP4_DESCR_COUNT 16
55
56 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
57 do { \
58 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
59 (modulus) = (dividend) % (divisor); \
60 (prev_dividend) = (dividend); \
61 } while (0)
62
63 #define PROBE_PACKET_MAX_BUF 8192
64 #define PROBE_PACKET_MARGIN 5
65
66 enum MpegTSFilterType {
67 MPEGTS_PES,
68 MPEGTS_SECTION,
69 MPEGTS_PCR,
70 };
71
72 typedef struct MpegTSFilter MpegTSFilter;
73
74 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
75 int is_start, int64_t pos);
76
77 typedef struct MpegTSPESFilter {
78 PESCallback *pes_cb;
79 void *opaque;
80 } MpegTSPESFilter;
81
82 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
83
84 typedef void SetServiceCallback (void *opaque, int ret);
85
86 typedef struct MpegTSSectionFilter {
87 int section_index;
88 int section_h_size;
89 int last_ver;
90 unsigned crc;
91 unsigned last_crc;
92 uint8_t *section_buf;
93 unsigned int check_crc : 1;
94 unsigned int end_of_section_reached : 1;
95 SectionCallback *section_cb;
96 void *opaque;
97 } MpegTSSectionFilter;
98
99 struct MpegTSFilter {
100 int pid;
101 int es_id;
102 int last_cc; /* last cc code (-1 if first packet) */
103 int64_t last_pcr;
104 int discard;
105 enum MpegTSFilterType type;
106 union {
107 MpegTSPESFilter pes_filter;
108 MpegTSSectionFilter section_filter;
109 } u;
110 };
111
112 struct Stream {
113 int idx;
114 int stream_identifier;
115 };
116
117 #define MAX_STREAMS_PER_PROGRAM 128
118 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
119 struct Program {
120 unsigned int id; // program id/service id
121 unsigned int nb_pids;
122 unsigned int pids[MAX_PIDS_PER_PROGRAM];
123 unsigned int nb_streams;
124 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
125
126 /** have we found pmt for this program */
127 int pmt_found;
128 };
129
130 struct MpegTSContext {
131 const AVClass *class;
132 /* user data */
133 AVFormatContext *stream;
134 /** raw packet size, including FEC if present */
135 int raw_packet_size;
136
137 int64_t pos47_full;
138
139 /** if true, all pids are analyzed to find streams */
140 int auto_guess;
141
142 /** compute exact PCR for each transport stream packet */
143 int mpeg2ts_compute_pcr;
144
145 /** fix dvb teletext pts */
146 int fix_teletext_pts;
147
148 int64_t cur_pcr; /**< used to estimate the exact PCR */
149 int64_t pcr_incr; /**< used to estimate the exact PCR */
150
151 /* data needed to handle file based ts */
152 /** stop parsing loop */
153 int stop_parse;
154 /** packet containing Audio/Video data */
155 AVPacket *pkt;
156 /** to detect seek */
157 int64_t last_pos;
158
159 int skip_changes;
160 int skip_clear;
161 int skip_unknown_pmt;
162
163 int scan_all_pmts;
164
165 int resync_size;
166 int merge_pmt_versions;
167 int max_packet_size;
168
169 int id;
170
171 /******************************************/
172 /* private mpegts data */
173 /* scan context */
174 /** structure to keep track of Program->pids mapping */
175 unsigned int nb_prg;
176 struct Program *prg;
177
178 int8_t crc_validity[NB_PID_MAX];
179 /** filters for various streams specified by PMT + for the PAT and PMT */
180 MpegTSFilter *pids[NB_PID_MAX];
181 int current_pid;
182
183 AVStream *epg_stream;
184 AVBufferPool* pools[32];
185 };
186
187 #define MPEGTS_OPTIONS \
188 { "resync_size", "set size limit for looking up a new synchronization", \
189 offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, \
190 { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, \
191 { "ts_id", "transport stream id", \
192 offsetof(MpegTSContext, id), AV_OPT_TYPE_INT, \
193 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, \
194 { "ts_packetsize", "output option carrying the raw packet size", \
195 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, \
196 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }
197
198 static const AVOption options[] = {
199 MPEGTS_OPTIONS,
200 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
201 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
202 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
203 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
204 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
205 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
206 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
207 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
208 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
209 {.i64 = 0}, 0, 1, 0 },
210 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
211 {.i64 = 0}, 0, 1, 0 },
212 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
213 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
214 { NULL },
215 };
216
217 static const AVClass mpegts_class = {
218 .class_name = "mpegts demuxer",
219 .item_name = av_default_item_name,
220 .option = options,
221 .version = LIBAVUTIL_VERSION_INT,
222 };
223
224 static const AVOption raw_options[] = {
225 MPEGTS_OPTIONS,
226 { "compute_pcr", "compute exact PCR for each transport stream packet",
227 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
228 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
229 { NULL },
230 };
231
232 static const AVClass mpegtsraw_class = {
233 .class_name = "mpegtsraw demuxer",
234 .item_name = av_default_item_name,
235 .option = raw_options,
236 .version = LIBAVUTIL_VERSION_INT,
237 };
238
239 /* TS stream handling */
240
241 enum MpegTSState {
242 MPEGTS_HEADER = 0,
243 MPEGTS_PESHEADER,
244 MPEGTS_PESHEADER_FILL,
245 MPEGTS_PAYLOAD,
246 MPEGTS_SKIP,
247 };
248
249 /* enough for PES header + length */
250 #define PES_START_SIZE 6
251 #define PES_HEADER_SIZE 9
252 #define MAX_PES_HEADER_SIZE (9 + 255)
253
254 typedef struct PESContext {
255 int pid;
256 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
257 int stream_type;
258 MpegTSContext *ts;
259 AVFormatContext *stream;
260 AVStream *st;
261 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
262 enum MpegTSState state;
263 /* used to get the format */
264 int data_index;
265 int flags; /**< copied to the AVPacket flags */
266 int PES_packet_length;
267 int pes_header_size;
268 int extended_stream_id;
269 uint8_t stream_id;
270 int64_t pts, dts;
271 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
272 uint8_t header[MAX_PES_HEADER_SIZE];
273 AVBufferRef *buffer;
274 SLConfigDescr sl;
275 int merged_st;
276 } PESContext;
277
278 EXTERN const FFInputFormat ff_mpegts_demuxer;
279
280 484 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
281 {
282 int i;
283
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 484 for (i = 0; i < ts->nb_prg; i++) {
284
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 429 if (ts->prg[i].id == programid) {
285 429 return &ts->prg[i];
286 }
287 }
288 55 return NULL;
289 }
290
291 172 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
292 {
293 172 AVProgram *prg = NULL;
294 int i;
295
296
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 172 for (i = 0; i < ts->stream->nb_programs; i++)
297
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 172 if (ts->stream->programs[i]->id == programid) {
298 172 prg = ts->stream->programs[i];
299 172 break;
300 }
301
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 172 if (!prg)
302 ✗ return;
303 172 prg->nb_stream_indexes = 0;
304 }
305
306 326 static void clear_program(struct Program *p)
307 {
308
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 326 if (!p)
309 ✗ return;
310 326 p->nb_pids = 0;
311 326 p->nb_streams = 0;
312 326 p->pmt_found = 0;
313 }
314
315 55 static void clear_programs(MpegTSContext *ts)
316 {
317 55 av_freep(&ts->prg);
318 55 ts->nb_prg = 0;
319 55 }
320
321 213 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
322 {
323 213 struct Program *p = get_program(ts, programid);
324
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 213 if (p)
325 158 return p;
326
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 55 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
327 ✗ ts->nb_prg = 0;
328 ✗ return NULL;
329 }
330 55 p = &ts->prg[ts->nb_prg];
331 55 p->id = programid;
332 55 clear_program(p);
333 55 ts->nb_prg++;
334 55 return p;
335 }
336
337 1314 static void add_pid_to_program(struct Program *p, unsigned int pid)
338 {
339 int i;
340
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 1314 if (!p)
341 ✗ return;
342
343
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 1314 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
344 ✗ return;
345
346
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 2638 for (i = 0; i < p->nb_pids; i++)
347
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 1759 if (p->pids[i] == pid)
348 435 return;
349
350 879 p->pids[p->nb_pids++] = pid;
351 }
352
353 271 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
354 unsigned int pid, int version)
355 {
356 int i;
357
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 271 for (i = 0; i < s->nb_programs; i++) {
358 271 AVProgram *program = s->programs[i];
359
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 271 if (program->id == programid) {
360 271 int old_pcr_pid = program->pcr_pid,
361 271 old_version = program->pmt_version;
362 271 program->pcr_pid = pid;
363 271 program->pmt_version = version;
364
365
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 271 if (old_version != -1 && old_version != version) {
366 18 av_log(s, AV_LOG_VERBOSE,
367 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
368 programid, old_version, version, old_pcr_pid, pid);
369 }
370 271 break;
371 }
372 }
373 271 }
374
375 /**
376 * @brief discard_pid() decides if the pid is to be discarded according
377 * to caller's programs selection
378 * @param ts : - TS context
379 * @param pid : - pid
380 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
381 * 0 otherwise
382 */
383 36027 static int discard_pid(MpegTSContext *ts, unsigned int pid)
384 {
385 int i, j, k;
386 36027 int used = 0, discarded = 0;
387 struct Program *p;
388
389
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 36027 if (pid == PAT_PID)
390 3008 return 0;
391
392 /* If none of the programs have .discard=AVDISCARD_ALL then there's
393 * no way we have to discard this packet */
394
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 66011 for (k = 0; k < ts->stream->nb_programs; k++)
395
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 32992 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
396 ✗ break;
397
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 33019 if (k == ts->stream->nb_programs)
398 33019 return 0;
399
400 ✗ for (i = 0; i < ts->nb_prg; i++) {
401 ✗ p = &ts->prg[i];
402 ✗ for (j = 0; j < p->nb_pids; j++) {
403 ✗ if (p->pids[j] != pid)
404 ✗ continue;
405 // is program with id p->id set to be discarded?
406 ✗ for (k = 0; k < ts->stream->nb_programs; k++) {
407 ✗ if (ts->stream->programs[k]->id == p->id) {
408 ✗ if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
409 ✗ discarded++;
410 else
411 ✗ used++;
412 }
413 }
414 }
415 }
416
417 ✗ return !used && discarded;
418 }
419
420 /**
421 * Assemble PES packets out of TS packets, and then call the "section_cb"
422 * function when they are complete.
423 */
424 6480 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
425 const uint8_t *buf, int buf_size, int is_start)
426 {
427 6480 MpegTSSectionFilter *tss = &tss1->u.section_filter;
428 6480 uint8_t *cur_section_buf = NULL;
429 int len, offset;
430
431
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 6480 if (is_start) {
432 6445 memcpy(tss->section_buf, buf, buf_size);
433 6445 tss->section_index = buf_size;
434 6445 tss->section_h_size = -1;
435 6445 tss->end_of_section_reached = 0;
436 } else {
437
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 35 if (tss->end_of_section_reached)
438 ✗ return;
439 35 len = MAX_SECTION_SIZE - tss->section_index;
440
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 35 if (buf_size < len)
441 35 len = buf_size;
442 35 memcpy(tss->section_buf + tss->section_index, buf, len);
443 35 tss->section_index += len;
444 }
445
446 6480 offset = 0;
447 6480 cur_section_buf = tss->section_buf;
448
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 12925 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != STUFFING_BYTE) {
449 /* compute section length if possible */
450
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 6688 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
451 6480 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
452
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 6480 if (len > MAX_SECTION_SIZE)
453 ✗ return;
454 6480 tss->section_h_size = len;
455 }
456
457
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 6688 if (tss->section_h_size != -1 &&
458
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 6480 tss->section_index >= offset + tss->section_h_size) {
459 6445 int crc_valid = 1;
460 6445 tss->end_of_section_reached = 1;
461
462
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 6445 if (tss->check_crc) {
463 6445 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
464
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 6445 if (tss->section_h_size >= 4)
465 6445 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
466
467
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 6445 if (crc_valid) {
468 6445 ts->crc_validity[ tss1->pid ] = 100;
469 ✗ }else if (ts->crc_validity[ tss1->pid ] > -10) {
470 ✗ ts->crc_validity[ tss1->pid ]--;
471 }else
472 ✗ crc_valid = 2;
473 }
474
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 6445 if (crc_valid) {
475 6445 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
476
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 6445 if (crc_valid != 1)
477 ✗ tss->last_ver = -1;
478 }
479
480 6445 cur_section_buf += tss->section_h_size;
481 6445 offset += tss->section_h_size;
482 6445 tss->section_h_size = -1;
483 } else {
484 243 tss->section_h_size = -1;
485 243 tss->end_of_section_reached = 0;
486 243 break;
487 }
488 }
489 }
490
491 353 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
492 enum MpegTSFilterType type)
493 {
494 MpegTSFilter *filter;
495
496 353 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
497
498
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 353 if (pid >= NB_PID_MAX || ts->pids[pid])
499 ✗ return NULL;
500 353 filter = av_mallocz(sizeof(MpegTSFilter));
501
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 353 if (!filter)
502 ✗ return NULL;
503 353 ts->pids[pid] = filter;
504
505 353 filter->type = type;
506 353 filter->pid = pid;
507 353 filter->es_id = -1;
508 353 filter->last_cc = -1;
509 353 filter->last_pcr= -1;
510
511 353 return filter;
512 }
513
514 227 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
515 unsigned int pid,
516 SectionCallback *section_cb,
517 void *opaque,
518 int check_crc)
519 {
520 MpegTSFilter *filter;
521 MpegTSSectionFilter *sec;
522 227 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
523
524
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 227 if (!section_buf)
525 ✗ return NULL;
526
527
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 227 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
528 ✗ av_free(section_buf);
529 ✗ return NULL;
530 }
531 227 sec = &filter->u.section_filter;
532 227 sec->section_cb = section_cb;
533 227 sec->opaque = opaque;
534 227 sec->section_buf = section_buf;
535 227 sec->check_crc = check_crc;
536 227 sec->last_ver = -1;
537
538 227 return filter;
539 }
540
541 126 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
542 PESCallback *pes_cb,
543 void *opaque)
544 {
545 MpegTSFilter *filter;
546 MpegTSPESFilter *pes;
547
548
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 126 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
549 ✗ return NULL;
550
551 126 pes = &filter->u.pes_filter;
552 126 pes->pes_cb = pes_cb;
553 126 pes->opaque = opaque;
554 126 return filter;
555 }
556
557 ✗ static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
558 {
559 ✗ return mpegts_open_filter(ts, pid, MPEGTS_PCR);
560 }
561
562 353 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
563 {
564 int pid;
565
566 353 pid = filter->pid;
567
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 353 if (filter->type == MPEGTS_SECTION)
568 227 av_freep(&filter->u.section_filter.section_buf);
569
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 126 else if (filter->type == MPEGTS_PES) {
570 126 PESContext *pes = filter->u.pes_filter.opaque;
571 126 av_buffer_unref(&pes->buffer);
572 /* referenced private data will be freed later in
573 * avformat_close_input (pes->st->priv_data == pes) */
574
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 126 if (!pes->st || pes->merged_st) {
575 21 av_freep(&filter->u.pes_filter.opaque);
576 }
577 }
578
579 353 av_free(filter);
580 353 ts->pids[pid] = NULL;
581 353 }
582
583 73167 static int analyze(const uint8_t *buf, int size, int packet_size,
584 int probe)
585 {
586 int stat[TS_MAX_PACKET_SIZE];
587 73167 int stat_all = 0;
588 int i;
589 73167 int best_score = 0;
590
591 73167 memset(stat, 0, packet_size * sizeof(*stat));
592
593
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 1120934530 for (i = 0; i < size - 3; i++) {
594
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 1120861363 if (buf[i] == SYNC_BYTE) {
595 1982387 int pid = AV_RB16(buf+1) & 0x1FFF;
596 1982387 int asc = buf[i + 3] & 0x30;
597
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 1982387 if (!probe || pid == 0x1FFF || asc) {
598 1634275 int x = i % packet_size;
599 1634275 stat[x]++;
600 1634275 stat_all++;
601
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 1634275 if (stat[x] > best_score) {
602 121673 best_score = stat[x];
603 }
604 }
605 }
606 }
607
608 73167 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
609 }
610
611 /* autodetect fec presence */
612 114 static int get_packet_size(AVFormatContext* s)
613 {
614 int score, fec_score, dvhs_score;
615 int margin;
616 int ret;
617
618 /*init buffer to store stream for probing */
619 114 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
620 114 int buf_size = 0;
621 114 int max_iterations = 16;
622
623
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 114 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
624 114 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
625
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 114 if (ret < 0)
626 ✗ return AVERROR_INVALIDDATA;
627 114 buf_size += ret;
628
629 114 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
630 114 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
631 114 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
632 114 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
633 buf_size, score, dvhs_score, fec_score);
634
635 114 margin = mid_pred(score, fec_score, dvhs_score);
636
637
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 114 if (buf_size < PROBE_PACKET_MAX_BUF)
638 1 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
639
640
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 114 if (score > margin)
641 114 return TS_PACKET_SIZE;
642 ✗ else if (dvhs_score > margin)
643 ✗ return TS_DVHS_PACKET_SIZE;
644 ✗ else if (fec_score > margin)
645 ✗ return TS_FEC_PACKET_SIZE;
646 }
647 ✗ return AVERROR_INVALIDDATA;
648 }
649
650 typedef struct SectionHeader {
651 uint8_t tid;
652 uint16_t id;
653 uint8_t version;
654 uint8_t current_next;
655 uint8_t sec_num;
656 uint8_t last_sec_num;
657 } SectionHeader;
658
659 5765 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
660 {
661
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 5765 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
662 5181 return 1;
663
664 584 tssf->last_ver = h->version;
665 584 tssf->last_crc = tssf->crc;
666
667 584 return 0;
668 }
669
670 31550 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
671 {
672 const uint8_t *p;
673 int c;
674
675 31550 p = *pp;
676
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 31550 if (p >= p_end)
677 1461 return AVERROR_INVALIDDATA;
678 30089 c = *p++;
679 30089 *pp = p;
680 30089 return c;
681 }
682
683 9705 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
684 {
685 const uint8_t *p;
686 int c;
687
688 9705 p = *pp;
689
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 9705 if (1 >= p_end - p)
690 313 return AVERROR_INVALIDDATA;
691 9392 c = AV_RB16(p);
692 9392 p += 2;
693 9392 *pp = p;
694 9392 return c;
695 }
696
697 /* read and allocate a DVB string preceded by its length */
698 200 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
699 {
700 int len;
701 const uint8_t *p;
702 char *str;
703
704 200 p = *pp;
705 200 len = get8(&p, p_end);
706
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 200 if (len < 0)
707 ✗ return NULL;
708
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 200 if (len > p_end - p)
709 ✗ return NULL;
710 #if CONFIG_ICONV
711
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 200 if (len) {
712 200 const char *encodings[] = {
713 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
714 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
715 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
716 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
717 "", "", "", "", "", "", "", ""
718 };
719 iconv_t cd;
720 char *in, *out;
721 200 size_t inlen = len, outlen = inlen * 6 + 1;
722
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 200 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
723 char iso8859[12];
724 ✗ snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
725 ✗ inlen -= 3;
726 ✗ in = (char *)p + 3;
727 ✗ cd = iconv_open("UTF-8", iso8859);
728
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 200 } else if (p[0] < 0x20) {
729 8 inlen -= 1;
730 8 in = (char *)p + 1;
731 8 cd = iconv_open("UTF-8", encodings[*p]);
732 } else {
733 192 in = (char *)p;
734 192 cd = iconv_open("UTF-8", encodings[0]);
735 }
736
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 200 if (cd == (iconv_t)-1)
737 ✗ goto no_iconv;
738 200 str = out = av_malloc(outlen);
739
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 200 if (!str) {
740 ✗ iconv_close(cd);
741 200 return NULL;
742 }
743
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 200 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
744 ✗ iconv_close(cd);
745 ✗ av_freep(&str);
746 ✗ goto no_iconv;
747 }
748 200 iconv_close(cd);
749 200 *out = 0;
750 200 *pp = p + len;
751 200 return str;
752 }
753 ✗ no_iconv:
754 #endif
755 ✗ str = av_malloc(len + 1);
756 ✗ if (!str)
757 ✗ return NULL;
758 ✗ memcpy(str, p, len);
759 ✗ str[len] = '\0';
760 ✗ p += len;
761 ✗ *pp = p;
762 ✗ return str;
763 }
764
765 6443 static int parse_section_header(SectionHeader *h,
766 const uint8_t **pp, const uint8_t *p_end)
767 {
768 int val;
769
770 6443 val = get8(pp, p_end);
771
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 6443 if (val < 0)
772 ✗ return val;
773 6443 h->tid = val;
774 6443 *pp += 2;
775 6443 val = get16(pp, p_end);
776
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 6443 if (val < 0)
777 ✗ return val;
778 6443 h->id = val;
779 6443 val = get8(pp, p_end);
780
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 6443 if (val < 0)
781 ✗ return val;
782 6443 h->version = (val >> 1) & 0x1f;
783 6443 h->current_next = val & 0x01;
784 6443 val = get8(pp, p_end);
785
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 6443 if (val < 0)
786 ✗ return val;
787 6443 h->sec_num = val;
788 6443 val = get8(pp, p_end);
789
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 6443 if (val < 0)
790 ✗ return val;
791 6443 h->last_sec_num = val;
792 6443 return 0;
793 }
794
795 typedef struct StreamType {
796 uint32_t stream_type;
797 enum AVMediaType codec_type;
798 enum AVCodecID codec_id;
799 } StreamType;
800
801 static const StreamType ISO_types[] = {
802 { STREAM_TYPE_VIDEO_MPEG1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
803 { STREAM_TYPE_VIDEO_MPEG2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
804 { STREAM_TYPE_AUDIO_MPEG1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
805 { STREAM_TYPE_AUDIO_MPEG2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
806 { STREAM_TYPE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
807 { STREAM_TYPE_VIDEO_MPEG4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
808 /* Makito encoder sets stream type 0x11 for AAC,
809 * so auto-detect LOAS/LATM instead of hardcoding it. */
810 #if !CONFIG_LOAS_DEMUXER
811 { STREAM_TYPE_AUDIO_AAC_LATM, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
812 #endif
813 { STREAM_TYPE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
814 { STREAM_TYPE_AUDIO_MPEG4, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
815 { STREAM_TYPE_VIDEO_MVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
816 { STREAM_TYPE_VIDEO_JPEG2000, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
817 { STREAM_TYPE_VIDEO_HEVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
818 { STREAM_TYPE_VIDEO_VVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
819 { STREAM_TYPE_VIDEO_CAVS, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
820 { STREAM_TYPE_VIDEO_DIRAC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
821 { STREAM_TYPE_VIDEO_AVS2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
822 { STREAM_TYPE_VIDEO_AVS3, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
823 { STREAM_TYPE_VIDEO_VC1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
824 { 0 },
825 };
826
827 static const StreamType HDMV_types[] = {
828 { STREAM_TYPE_BLURAY_AUDIO_PCM_BLURAY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
829 { STREAM_TYPE_BLURAY_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
830 { STREAM_TYPE_BLURAY_AUDIO_DTS, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
831 { STREAM_TYPE_BLURAY_AUDIO_TRUEHD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
832 { STREAM_TYPE_BLURAY_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
833 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
834 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD_MASTER, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
835 { STREAM_TYPE_BLURAY_AUDIO_EAC3_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
836 { STREAM_TYPE_BLURAY_AUDIO_DTS_EXPRESS_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
837 { STREAM_TYPE_BLURAY_SUBTITLE_PGS, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
838 { STREAM_TYPE_BLURAY_SUBTITLE_TEXT, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
839 { 0 },
840 };
841
842 /* SCTE types */
843 static const StreamType SCTE_types[] = {
844 { STREAM_TYPE_SCTE_DATA_SCTE_35, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
845 { 0 },
846 };
847
848 /* ATSC ? */
849 static const StreamType MISC_types[] = {
850 { STREAM_TYPE_ATSC_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
851 { STREAM_TYPE_ATSC_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
852 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
853 { 0 },
854 };
855
856 /* HLS Sample Encryption Types */
857 static const StreamType HLS_SAMPLE_ENC_types[] = {
858 { STREAM_TYPE_HLS_SE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
859 { STREAM_TYPE_HLS_SE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
860 { STREAM_TYPE_HLS_SE_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
861 { STREAM_TYPE_HLS_SE_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
862 { 0 },
863 };
864
865 static const StreamType REGD_types[] = {
866 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
867 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
868 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
869 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
870 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
871 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
872 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
873 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
874 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
875 { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
876 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
877 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
878 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
879 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
880 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
881 { 0 },
882 };
883
884 static const StreamType METADATA_types[] = {
885 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
886 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
887 { 0 },
888 };
889
890 /* descriptor present */
891 static const StreamType DESC_types[] = {
892 { AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
893 { ENHANCED_AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
894 { DTS_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
895 { TELETEXT_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
896 { SUBTITLING_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE },
897 { 0 },
898 };
899
900 191 static void mpegts_find_stream_type(AVStream *st,
901 uint32_t stream_type,
902 const StreamType *types)
903 {
904 191 FFStream *const sti = ffstream(st);
905
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 1137 for (; types->stream_type; types++)
906
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 1066 if (stream_type == types->stream_type) {
907
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 120 if (st->codecpar->codec_type != types->codec_type ||
908
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 14 st->codecpar->codec_id != types->codec_id) {
909 119 st->codecpar->codec_type = types->codec_type;
910 119 st->codecpar->codec_id = types->codec_id;
911 119 sti->need_context_update = 1;
912 }
913 120 sti->request_probe = 0;
914 120 return;
915 }
916 }
917
918 115 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
919 uint32_t stream_type, uint32_t prog_reg_desc)
920 {
921 115 FFStream *const sti = ffstream(st);
922 115 int old_codec_type = st->codecpar->codec_type;
923 115 int old_codec_id = st->codecpar->codec_id;
924 115 int old_codec_tag = st->codecpar->codec_tag;
925
926 115 avpriv_set_pts_info(st, 33, 1, 90000);
927 115 st->priv_data = pes;
928 115 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
929 115 st->codecpar->codec_id = AV_CODEC_ID_NONE;
930 115 sti->need_parsing = AVSTREAM_PARSE_FULL;
931 115 pes->st = st;
932 115 pes->stream_type = stream_type;
933
934 115 av_log(pes->stream, AV_LOG_DEBUG,
935 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
936 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
937
938 115 st->codecpar->codec_tag = pes->stream_type;
939
940 115 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
941
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 115 if (pes->stream_type == STREAM_TYPE_AUDIO_MPEG2 || pes->stream_type == STREAM_TYPE_AUDIO_AAC)
942 11 sti->request_probe = 50;
943
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 115 if (pes->stream_type == STREAM_TYPE_PRIVATE_DATA)
944 11 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY;
945
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 115 if ((prog_reg_desc == AV_RL32("HDMV") ||
946
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 115 prog_reg_desc == AV_RL32("HDPR")) &&
947 ✗ st->codecpar->codec_id == AV_CODEC_ID_NONE) {
948 ✗ mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
949 ✗ if (pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD) {
950 // HDMV TrueHD streams also contain an AC3 coded version of the
951 // audio track - add a second stream for this
952 AVStream *sub_st;
953 // priv_data cannot be shared between streams
954 ✗ PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
955 ✗ if (!sub_pes)
956 ✗ return AVERROR(ENOMEM);
957
958 ✗ sub_st = avformat_new_stream(pes->stream, NULL);
959 ✗ if (!sub_st) {
960 ✗ av_free(sub_pes);
961 ✗ return AVERROR(ENOMEM);
962 }
963
964 ✗ sub_st->id = pes->pid;
965 ✗ avpriv_set_pts_info(sub_st, 33, 1, 90000);
966 ✗ sub_st->priv_data = sub_pes;
967 ✗ sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
968 ✗ sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
969 ✗ ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
970 ✗ sub_pes->sub_st = pes->sub_st = sub_st;
971 }
972 }
973
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 115 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
974 35 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
975
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 115 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
976 14 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
977
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 115 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
978 14 st->codecpar->codec_id = old_codec_id;
979 14 st->codecpar->codec_type = old_codec_type;
980 }
981
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 115 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
982
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 107 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
983
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 8 sti->probe_packets > 0 &&
984 stream_type == STREAM_TYPE_PRIVATE_DATA) {
985 5 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
986 5 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
987 5 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
988 }
989
990 /* queue a context update if properties changed */
991
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 115 if (old_codec_type != st->codecpar->codec_type ||
992
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 13 old_codec_id != st->codecpar->codec_id ||
993
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 9 old_codec_tag != st->codecpar->codec_tag)
994 115 sti->need_context_update = 1;
995
996 115 return 0;
997 }
998
999 55588 static void reset_pes_packet_state(PESContext *pes)
1000 {
1001 55588 pes->pts = AV_NOPTS_VALUE;
1002 55588 pes->dts = AV_NOPTS_VALUE;
1003 55588 pes->data_index = 0;
1004 55588 pes->flags = 0;
1005 55588 av_buffer_unref(&pes->buffer);
1006 55588 }
1007
1008 12 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1009 {
1010 12 av_packet_unref(pkt);
1011 12 pkt->data = (uint8_t *)buffer;
1012 12 pkt->size = len;
1013 12 }
1014
1015 28869 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1016 {
1017 uint8_t *sd;
1018
1019 28869 av_packet_unref(pkt);
1020
1021 28869 pkt->buf = pes->buffer;
1022 28869 pkt->data = pes->buffer->data;
1023 28869 pkt->size = pes->data_index;
1024
1025
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 28869 if (pes->PES_packet_length &&
1026
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 25946 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1027 PES_START_SIZE) {
1028 90 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1029 90 pes->flags |= AV_PKT_FLAG_CORRUPT;
1030 }
1031 28869 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1032
1033 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1034
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 28869 if (pes->sub_st && pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD && pes->extended_stream_id == 0x76)
1035 ✗ pkt->stream_index = pes->sub_st->index;
1036 else
1037 28869 pkt->stream_index = pes->st->index;
1038 28869 pkt->pts = pes->pts;
1039 28869 pkt->dts = pes->dts;
1040 /* store position of first TS packet of this PES packet */
1041 28869 pkt->pos = pes->ts_packet_pos;
1042 28869 pkt->flags = pes->flags;
1043
1044 28869 pes->buffer = NULL;
1045 28869 reset_pes_packet_state(pes);
1046
1047 28869 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1048
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 28869 if (!sd)
1049 ✗ return AVERROR(ENOMEM);
1050 28869 *sd = pes->stream_id;
1051
1052 28869 return 0;
1053 }
1054
1055 ✗ static uint64_t get_ts64(GetBitContext *gb, int bits)
1056 {
1057 ✗ if (get_bits_left(gb) < bits)
1058 ✗ return AV_NOPTS_VALUE;
1059 ✗ return get_bits64(gb, bits);
1060 }
1061
1062 ✗ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1063 const uint8_t *buf, int buf_size)
1064 {
1065 GetBitContext gb;
1066 ✗ int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1067 ✗ int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1068 ✗ int dts_flag = -1, cts_flag = -1;
1069 ✗ int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1070 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1071 ✗ int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1072
1073 ✗ memcpy(buf_padded, buf, buf_padded_size);
1074
1075 ✗ init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1076
1077 ✗ if (sl->use_au_start)
1078 ✗ au_start_flag = get_bits1(&gb);
1079 ✗ if (sl->use_au_end)
1080 ✗ au_end_flag = get_bits1(&gb);
1081 ✗ if (!sl->use_au_start && !sl->use_au_end)
1082 ✗ au_start_flag = au_end_flag = 1;
1083 ✗ if (sl->ocr_len > 0)
1084 ✗ ocr_flag = get_bits1(&gb);
1085 ✗ if (sl->use_idle)
1086 ✗ idle_flag = get_bits1(&gb);
1087 ✗ if (sl->use_padding)
1088 ✗ padding_flag = get_bits1(&gb);
1089 ✗ if (padding_flag)
1090 ✗ padding_bits = get_bits(&gb, 3);
1091
1092 ✗ if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1093 ✗ if (sl->packet_seq_num_len)
1094 ✗ skip_bits_long(&gb, sl->packet_seq_num_len);
1095 ✗ if (sl->degr_prior_len)
1096 ✗ if (get_bits1(&gb))
1097 ✗ skip_bits(&gb, sl->degr_prior_len);
1098 ✗ if (ocr_flag)
1099 ✗ skip_bits_long(&gb, sl->ocr_len);
1100 ✗ if (au_start_flag) {
1101 ✗ if (sl->use_rand_acc_pt)
1102 ✗ get_bits1(&gb);
1103 ✗ if (sl->au_seq_num_len > 0)
1104 ✗ skip_bits_long(&gb, sl->au_seq_num_len);
1105 ✗ if (sl->use_timestamps) {
1106 ✗ dts_flag = get_bits1(&gb);
1107 ✗ cts_flag = get_bits1(&gb);
1108 }
1109 }
1110 ✗ if (sl->inst_bitrate_len)
1111 ✗ inst_bitrate_flag = get_bits1(&gb);
1112 ✗ if (dts_flag == 1)
1113 ✗ dts = get_ts64(&gb, sl->timestamp_len);
1114 ✗ if (cts_flag == 1)
1115 ✗ cts = get_ts64(&gb, sl->timestamp_len);
1116 ✗ if (sl->au_len > 0)
1117 ✗ skip_bits_long(&gb, sl->au_len);
1118 ✗ if (inst_bitrate_flag)
1119 ✗ skip_bits_long(&gb, sl->inst_bitrate_len);
1120 }
1121
1122 ✗ if (dts != AV_NOPTS_VALUE)
1123 ✗ pes->dts = dts;
1124 ✗ if (cts != AV_NOPTS_VALUE)
1125 ✗ pes->pts = cts;
1126
1127 ✗ if (sl->timestamp_len && sl->timestamp_res)
1128 ✗ avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1129
1130 ✗ return (get_bits_count(&gb) + 7) >> 3;
1131 }
1132
1133 28970 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1134 {
1135 28970 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1136
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 28970 if (!ts->pools[index]) {
1137
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 158 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1138 158 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1139
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 158 if (!ts->pools[index])
1140 ✗ return NULL;
1141 }
1142 28970 return av_buffer_pool_get(ts->pools[index]);
1143 }
1144
1145 /* return non zero if a packet could be constructed */
1146 373954 static int mpegts_push_data(MpegTSFilter *filter,
1147 const uint8_t *buf, int buf_size, int is_start,
1148 int64_t pos)
1149 {
1150 373954 PESContext *pes = filter->u.pes_filter.opaque;
1151 373954 MpegTSContext *ts = pes->ts;
1152 const uint8_t *p;
1153 int ret, len;
1154
1155
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 373954 if (!ts->pkt)
1156 ✗ return 0;
1157
1158
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 373954 if (is_start) {
1159
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 29570 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1160 2851 ret = new_pes_packet(pes, ts->pkt);
1161
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 2851 if (ret < 0)
1162 ✗ return ret;
1163 2851 ts->stop_parse = 1;
1164 } else {
1165 26719 reset_pes_packet_state(pes);
1166 }
1167 29570 pes->state = MPEGTS_HEADER;
1168 29570 pes->ts_packet_pos = pos;
1169 }
1170 373954 p = buf;
1171
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 1209370 while (buf_size > 0) {
1172
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 461462 switch (pes->state) {
1173 29570 case MPEGTS_HEADER:
1174 29570 len = PES_START_SIZE - pes->data_index;
1175
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 29570 if (len > buf_size)
1176 2 len = buf_size;
1177 29570 memcpy(pes->header + pes->data_index, p, len);
1178 29570 pes->data_index += len;
1179 29570 p += len;
1180 29570 buf_size -= len;
1181
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 29570 if (pes->data_index == PES_START_SIZE) {
1182 /* we got all the PES or section header. We can now
1183 * decide */
1184
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 29568 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1185
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 29561 pes->header[2] == 0x01) {
1186 /* it must be an MPEG-2 PES stream */
1187 29561 pes->stream_id = pes->header[3];
1188 29561 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1189
1190
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 29561 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1191
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 591 (!pes->sub_st ||
1192 ✗ pes->sub_st->discard == AVDISCARD_ALL)) ||
1193
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 28970 pes->stream_id == STREAM_ID_PADDING_STREAM)
1194 591 goto skip;
1195
1196 /* stream not present in PMT */
1197
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 28970 if (!pes->st) {
1198 ✗ if (ts->skip_changes)
1199 ✗ goto skip;
1200 ✗ if (ts->merge_pmt_versions)
1201 ✗ goto skip; /* wait for PMT to merge new stream */
1202
1203 ✗ pes->st = avformat_new_stream(ts->stream, NULL);
1204 ✗ if (!pes->st)
1205 ✗ return AVERROR(ENOMEM);
1206 ✗ pes->st->id = pes->pid;
1207 ✗ mpegts_set_stream_info(pes->st, pes, 0, 0);
1208 }
1209
1210 28970 pes->PES_packet_length = AV_RB16(pes->header + 4);
1211 /* NOTE: zero length means the PES size is unbounded */
1212
1213
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 28970 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1214
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 28970 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1215
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 28970 pes->stream_id != STREAM_ID_ECM_STREAM &&
1216
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 28970 pes->stream_id != STREAM_ID_EMM_STREAM &&
1217
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 28970 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1218
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 28970 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1219
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✗ Branch 1 not taken.
 57940 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1220 28970 FFStream *const pes_sti = ffstream(pes->st);
1221 28970 pes->state = MPEGTS_PESHEADER;
1222
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 28970 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1223 2 av_log(pes->stream, AV_LOG_TRACE,
1224 "pid=%x stream_type=%x probing\n",
1225 pes->pid,
1226 pes->stream_type);
1227 2 pes_sti->request_probe = 1;
1228 }
1229 } else {
1230 ✗ pes->pes_header_size = 6;
1231 ✗ pes->state = MPEGTS_PAYLOAD;
1232 ✗ pes->data_index = 0;
1233 }
1234 } else {
1235 /* otherwise, it should be a table */
1236 /* skip packet */
1237 7 skip:
1238 598 pes->state = MPEGTS_SKIP;
1239 598 continue;
1240 }
1241 }
1242 28972 break;
1243 /**********************************************/
1244 /* PES packing parsing */
1245 28970 case MPEGTS_PESHEADER:
1246 28970 len = PES_HEADER_SIZE - pes->data_index;
1247
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 28970 if (len < 0)
1248 ✗ return AVERROR_INVALIDDATA;
1249
1/2
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 28970 if (len > buf_size)
1250 ✗ len = buf_size;
1251 28970 memcpy(pes->header + pes->data_index, p, len);
1252 28970 pes->data_index += len;
1253 28970 p += len;
1254 28970 buf_size -= len;
1255
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 28970 if (pes->data_index == PES_HEADER_SIZE) {
1256 28970 pes->pes_header_size = pes->header[8] + 9;
1257 28970 pes->state = MPEGTS_PESHEADER_FILL;
1258 }
1259 28970 break;
1260 28970 case MPEGTS_PESHEADER_FILL:
1261 28970 len = pes->pes_header_size - pes->data_index;
1262
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 28970 if (len < 0)
1263 ✗ return AVERROR_INVALIDDATA;
1264
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 28970 if (len > buf_size)
1265 ✗ len = buf_size;
1266 28970 memcpy(pes->header + pes->data_index, p, len);
1267 28970 pes->data_index += len;
1268 28970 p += len;
1269 28970 buf_size -= len;
1270
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✗ Branch 1 not taken.
 28970 if (pes->data_index == pes->pes_header_size) {
1271 const uint8_t *r;
1272 unsigned int flags, pes_ext, skip;
1273
1274 28970 flags = pes->header[7];
1275 28970 r = pes->header + 9;
1276 28970 pes->pts = AV_NOPTS_VALUE;
1277 28970 pes->dts = AV_NOPTS_VALUE;
1278
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 28970 if ((flags & 0xc0) == 0x80) {
1279 10069 pes->dts = pes->pts = ff_parse_pes_pts(r);
1280 10069 r += 5;
1281
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 18901 } else if ((flags & 0xc0) == 0xc0) {
1282 1854 pes->pts = ff_parse_pes_pts(r);
1283 1854 r += 5;
1284 1854 pes->dts = ff_parse_pes_pts(r);
1285 1854 r += 5;
1286 }
1287 28970 pes->extended_stream_id = -1;
1288
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 28970 if (flags & 0x01) { /* PES extension */
1289 ✗ pes_ext = *r++;
1290 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1291 ✗ skip = (pes_ext >> 4) & 0xb;
1292 ✗ skip += skip & 0x9;
1293 ✗ r += skip;
1294 ✗ if ((pes_ext & 0x41) == 0x01 &&
1295 ✗ (r + 2) <= (pes->header + pes->pes_header_size)) {
1296 /* PES extension 2 */
1297 ✗ if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1298 ✗ pes->extended_stream_id = r[1];
1299 }
1300 }
1301
1302 /* we got the full header. We parse it and get the payload */
1303 28970 pes->state = MPEGTS_PAYLOAD;
1304 28970 pes->data_index = 0;
1305
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 28970 if (pes->stream_type == STREAM_TYPE_ISO_IEC_14496_PES && buf_size > 0) {
1306 ✗ int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1307 buf_size);
1308 ✗ pes->pes_header_size += sl_header_bytes;
1309 ✗ p += sl_header_bytes;
1310 ✗ buf_size -= sl_header_bytes;
1311 }
1312
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 28970 if (pes->stream_type == STREAM_TYPE_METADATA &&
1313
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 6 pes->stream_id == STREAM_ID_METADATA_STREAM &&
1314 ✗ pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV &&
1315 buf_size >= 5) {
1316 /* skip metadata access unit header - see MISB ST 1402 */
1317 ✗ pes->pes_header_size += 5;
1318 ✗ p += 5;
1319 ✗ buf_size -= 5;
1320 }
1321
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✗ Branch 1 not taken.
 28970 if ( pes->ts->fix_teletext_pts
1322
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✗ Branch 1 not taken.
 28970 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1323
2/2
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✓ Branch 1 taken 28715 times.
 28970 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1324 ) {
1325 255 AVProgram *p = NULL;
1326 255 int pcr_found = 0;
1327
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✓ Branch 2 taken 255 times.
 510 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1328
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✗ Branch 3 not taken.
 255 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1329 255 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1330
1/2
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✗ Branch 1 not taken.
 255 if (f) {
1331 255 AVStream *st = NULL;
1332
1/2
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✗ Branch 1 not taken.
 255 if (f->type == MPEGTS_PES) {
1333 255 PESContext *pcrpes = f->u.pes_filter.opaque;
1334
1/2
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✗ Branch 1 not taken.
 255 if (pcrpes)
1335 255 st = pcrpes->st;
1336 ✗ } else if (f->type == MPEGTS_PCR) {
1337 int i;
1338 ✗ for (i = 0; i < p->nb_stream_indexes; i++) {
1339 ✗ AVStream *pst = pes->stream->streams[p->stream_index[i]];
1340 ✗ if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1341 ✗ st = pst;
1342 }
1343 }
1344
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 255 if (f->last_pcr != -1 && !f->discard) {
1345 // teletext packets do not always have correct timestamps,
1346 // the standard says they should be handled after 40.6 ms at most,
1347 // and the pcr error to this packet should be no more than 100 ms.
1348 // TODO: we should interpolate the PCR, not just use the last one
1349 ✗ int64_t pcr = f->last_pcr / SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1350 ✗ pcr_found = 1;
1351 ✗ if (st) {
1352 ✗ const FFStream *const sti = ffstream(st);
1353 ✗ FFStream *const pes_sti = ffstream(pes->st);
1354
1355 ✗ pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1356 ✗ pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1357 }
1358 ✗ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1359 ✗ pes->pts = pes->dts = pcr;
1360 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1361 ✗ pes->dts > pcr + 3654 + 9000) {
1362 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1363 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1364 ✗ pes->dts > pcr + 10*90000) { //10sec
1365 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1366 }
1367 ✗ break;
1368 }
1369 }
1370 }
1371 }
1372
1373
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 255 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1374 !pcr_found) {
1375 ✗ av_log(pes->stream, AV_LOG_VERBOSE,
1376 "Forcing DTS/PTS to be unset for a "
1377 "non-trustworthy PES packet for PID %d as "
1378 "PCR hasn't been received yet.\n",
1379 pes->pid);
1380 ✗ pes->dts = pes->pts = AV_NOPTS_VALUE;
1381 }
1382 }
1383 }
1384 28970 break;
1385 355410 case MPEGTS_PAYLOAD:
1386 do {
1387 355410 int max_packet_size = ts->max_packet_size;
1388
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 355410 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1389 195154 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1390
1391
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 355410 if (pes->data_index > 0 &&
1392
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 326440 pes->data_index + buf_size > max_packet_size) {
1393 ✗ ret = new_pes_packet(pes, ts->pkt);
1394 ✗ if (ret < 0)
1395 ✗ return ret;
1396 ✗ pes->PES_packet_length = 0;
1397 ✗ max_packet_size = ts->max_packet_size;
1398 ✗ ts->stop_parse = 1;
1399
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 355410 } else if (pes->data_index == 0 &&
1400 buf_size > max_packet_size) {
1401 // pes packet size is < ts size packet and pes data is padded with STUFFING_BYTE
1402 // not sure if this is legal in ts but see issue #2392
1403 ✗ buf_size = max_packet_size;
1404 }
1405
1406
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 355410 if (!pes->buffer) {
1407 28970 pes->buffer = buffer_pool_get(ts, max_packet_size);
1408
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 28970 if (!pes->buffer)
1409 ✗ return AVERROR(ENOMEM);
1410 }
1411
1412 355410 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1413 355410 pes->data_index += buf_size;
1414 /* emit complete packets with known packet size
1415 * decreases demuxer delay for infrequent packets like subtitles from
1416 * a couple of seconds to milliseconds for properly muxed files. */
1417
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 355410 if (!ts->stop_parse && pes->PES_packet_length &&
1418
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 195154 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1419 25856 ts->stop_parse = 1;
1420 25856 ret = new_pes_packet(pes, ts->pkt);
1421 25856 pes->state = MPEGTS_SKIP;
1422
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 25856 if (ret < 0)
1423 ✗ return ret;
1424 }
1425 } while (0);
1426 355410 buf_size = 0;
1427 355410 break;
1428 18542 case MPEGTS_SKIP:
1429 18542 buf_size = 0;
1430 18542 break;
1431 }
1432 }
1433
1434 373954 return 0;
1435 }
1436
1437 126 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1438 {
1439 MpegTSFilter *tss;
1440 PESContext *pes;
1441
1442 /* if no pid found, then add a pid context */
1443 126 pes = av_mallocz(sizeof(PESContext));
1444
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 126 if (!pes)
1445 ✗ return 0;
1446 126 pes->ts = ts;
1447 126 pes->stream = ts->stream;
1448 126 pes->pid = pid;
1449 126 pes->pcr_pid = pcr_pid;
1450 126 pes->state = MPEGTS_SKIP;
1451 126 pes->pts = AV_NOPTS_VALUE;
1452 126 pes->dts = AV_NOPTS_VALUE;
1453 126 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1454
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 126 if (!tss) {
1455 ✗ av_free(pes);
1456 ✗ return 0;
1457 }
1458 126 return pes;
1459 }
1460
1461 #define MAX_LEVEL 4
1462 typedef struct MP4DescrParseContext {
1463 AVFormatContext *s;
1464 FFIOContext pb;
1465 Mp4Descr *descr;
1466 Mp4Descr *active_descr;
1467 int descr_count;
1468 int max_descr_count;
1469 int level;
1470 int predefined_SLConfigDescriptor_seen;
1471 } MP4DescrParseContext;
1472
1473 ✗ static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1474 const uint8_t *buf, unsigned size,
1475 Mp4Descr *descr, int max_descr_count)
1476 {
1477 ✗ if (size > (1 << 30))
1478 ✗ return AVERROR_INVALIDDATA;
1479
1480 ✗ ffio_init_read_context(&d->pb, buf, size);
1481
1482 ✗ d->s = s;
1483 ✗ d->level = 0;
1484 ✗ d->descr_count = 0;
1485 ✗ d->descr = descr;
1486 ✗ d->active_descr = NULL;
1487 ✗ d->max_descr_count = max_descr_count;
1488
1489 ✗ return 0;
1490 }
1491
1492 ✗ static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1493 {
1494 ✗ int64_t new_off = avio_tell(pb);
1495 ✗ (*len) -= new_off - *off;
1496 ✗ *off = new_off;
1497 ✗ }
1498
1499 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1500 int target_tag);
1501
1502 ✗ static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1503 {
1504 ✗ while (len > 0) {
1505 ✗ int ret = parse_mp4_descr(d, off, len, 0);
1506 ✗ if (ret < 0)
1507 ✗ return ret;
1508 ✗ update_offsets(&d->pb.pub, &off, &len);
1509 }
1510 ✗ return 0;
1511 }
1512
1513 ✗ static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1514 {
1515 ✗ AVIOContext *const pb = &d->pb.pub;
1516 ✗ avio_rb16(pb); // ID
1517 ✗ avio_r8(pb);
1518 ✗ avio_r8(pb);
1519 ✗ avio_r8(pb);
1520 ✗ avio_r8(pb);
1521 ✗ avio_r8(pb);
1522 ✗ update_offsets(pb, &off, &len);
1523 ✗ return parse_mp4_descr_arr(d, off, len);
1524 }
1525
1526 ✗ static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1527 {
1528 int id_flags;
1529 ✗ if (len < 2)
1530 ✗ return 0;
1531 ✗ id_flags = avio_rb16(&d->pb.pub);
1532 ✗ if (!(id_flags & 0x0020)) { // URL_Flag
1533 ✗ update_offsets(&d->pb.pub, &off, &len);
1534 ✗ return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1535 } else {
1536 ✗ return 0;
1537 }
1538 }
1539
1540 ✗ static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1541 {
1542 ✗ AVIOContext *const pb = &d->pb.pub;
1543 ✗ int es_id = 0;
1544 ✗ int ret = 0;
1545
1546 ✗ if (d->descr_count >= d->max_descr_count)
1547 ✗ return AVERROR_INVALIDDATA;
1548 ✗ ff_mp4_parse_es_descr(pb, &es_id);
1549 ✗ d->active_descr = d->descr + (d->descr_count++);
1550
1551 ✗ d->active_descr->es_id = es_id;
1552 ✗ update_offsets(pb, &off, &len);
1553 ✗ if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1554 ✗ return ret;
1555 ✗ update_offsets(pb, &off, &len);
1556 ✗ if (len > 0)
1557 ✗ ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1558 ✗ d->active_descr = NULL;
1559 ✗ return ret;
1560 }
1561
1562 ✗ static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1563 int len)
1564 {
1565 ✗ Mp4Descr *descr = d->active_descr;
1566 ✗ if (!descr)
1567 ✗ return AVERROR_INVALIDDATA;
1568 ✗ d->active_descr->dec_config_descr = av_malloc(len);
1569 ✗ if (!descr->dec_config_descr)
1570 ✗ return AVERROR(ENOMEM);
1571 ✗ descr->dec_config_descr_len = len;
1572 ✗ avio_read(&d->pb.pub, descr->dec_config_descr, len);
1573 ✗ return 0;
1574 }
1575
1576 ✗ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1577 {
1578 ✗ Mp4Descr *descr = d->active_descr;
1579 ✗ AVIOContext *const pb = &d->pb.pub;
1580 int predefined;
1581 ✗ if (!descr)
1582 ✗ return AVERROR_INVALIDDATA;
1583
1584 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1585 descr->sl.dst = avio_r8(pb); \
1586 if (descr->sl.dst > maxv) { \
1587 descr->sl.dst = maxv; \
1588 return AVERROR_INVALIDDATA; \
1589 } \
1590 } while (0)
1591
1592 ✗ predefined = avio_r8(pb);
1593 ✗ if (!predefined) {
1594 int lengths;
1595 ✗ int flags = avio_r8(pb);
1596 ✗ descr->sl.use_au_start = !!(flags & 0x80);
1597 ✗ descr->sl.use_au_end = !!(flags & 0x40);
1598 ✗ descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1599 ✗ descr->sl.use_padding = !!(flags & 0x08);
1600 ✗ descr->sl.use_timestamps = !!(flags & 0x04);
1601 ✗ descr->sl.use_idle = !!(flags & 0x02);
1602 ✗ descr->sl.timestamp_res = avio_rb32(pb);
1603 ✗ avio_rb32(pb);
1604 ✗ R8_CHECK_CLIP_MAX(timestamp_len, 63);
1605 ✗ R8_CHECK_CLIP_MAX(ocr_len, 63);
1606 ✗ R8_CHECK_CLIP_MAX(au_len, 31);
1607 ✗ descr->sl.inst_bitrate_len = avio_r8(pb);
1608 ✗ lengths = avio_rb16(pb);
1609 ✗ descr->sl.degr_prior_len = lengths >> 12;
1610 ✗ descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1611 ✗ descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1612 ✗ } else if (!d->predefined_SLConfigDescriptor_seen){
1613 ✗ avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1614 ✗ d->predefined_SLConfigDescriptor_seen = 1;
1615 }
1616 ✗ return 0;
1617 }
1618
1619 ✗ static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1620 int target_tag)
1621 {
1622 int tag;
1623 ✗ AVIOContext *const pb = &d->pb.pub;
1624 ✗ int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1625 ✗ int ret = 0;
1626
1627 ✗ update_offsets(pb, &off, &len);
1628 ✗ if (len < 0 || len1 > len || len1 <= 0) {
1629 ✗ av_log(d->s, AV_LOG_ERROR,
1630 "Tag %x length violation new length %d bytes remaining %d\n",
1631 tag, len1, len);
1632 ✗ return AVERROR_INVALIDDATA;
1633 }
1634
1635 ✗ if (d->level++ >= MAX_LEVEL) {
1636 ✗ av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1637 ✗ ret = AVERROR_INVALIDDATA;
1638 ✗ goto done;
1639 }
1640
1641 ✗ if (target_tag && tag != target_tag) {
1642 ✗ av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1643 target_tag);
1644 ✗ ret = AVERROR_INVALIDDATA;
1645 ✗ goto done;
1646 }
1647
1648 ✗ switch (tag) {
1649 ✗ case MP4IODescrTag:
1650 ✗ ret = parse_MP4IODescrTag(d, off, len1);
1651 ✗ break;
1652 ✗ case MP4ODescrTag:
1653 ✗ ret = parse_MP4ODescrTag(d, off, len1);
1654 ✗ break;
1655 ✗ case MP4ESDescrTag:
1656 ✗ ret = parse_MP4ESDescrTag(d, off, len1);
1657 ✗ break;
1658 ✗ case MP4DecConfigDescrTag:
1659 ✗ ret = parse_MP4DecConfigDescrTag(d, off, len1);
1660 ✗ break;
1661 ✗ case MP4SLDescrTag:
1662 ✗ ret = parse_MP4SLDescrTag(d, off, len1);
1663 ✗ break;
1664 }
1665
1666
1667 ✗ done:
1668 ✗ d->level--;
1669 ✗ avio_seek(pb, off + len1, SEEK_SET);
1670 ✗ return ret;
1671 }
1672
1673 ✗ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1674 Mp4Descr *descr, int *descr_count, int max_descr_count)
1675 {
1676 MP4DescrParseContext d;
1677 int ret;
1678
1679 ✗ d.predefined_SLConfigDescriptor_seen = 0;
1680
1681 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1682 ✗ if (ret < 0)
1683 ✗ return ret;
1684
1685 ✗ ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1686
1687 ✗ *descr_count = d.descr_count;
1688 ✗ return ret;
1689 }
1690
1691 ✗ static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1692 Mp4Descr *descr, int *descr_count, int max_descr_count)
1693 {
1694 MP4DescrParseContext d;
1695 int ret;
1696
1697 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1698 ✗ if (ret < 0)
1699 ✗ return ret;
1700
1701 ✗ ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1702
1703 ✗ *descr_count = d.descr_count;
1704 ✗ return ret;
1705 }
1706
1707 ✗ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1708 int section_len)
1709 {
1710 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1711 ✗ MpegTSSectionFilter *tssf = &filter->u.section_filter;
1712 SectionHeader h;
1713 const uint8_t *p, *p_end;
1714 ✗ int mp4_descr_count = 0;
1715 ✗ Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1716 int i, pid;
1717 ✗ AVFormatContext *s = ts->stream;
1718
1719 ✗ p_end = section + section_len - 4;
1720 ✗ p = section;
1721 ✗ if (parse_section_header(&h, &p, p_end) < 0)
1722 ✗ return;
1723 ✗ if (h.tid != M4OD_TID)
1724 ✗ return;
1725 ✗ if (skip_identical(&h, tssf))
1726 ✗ return;
1727
1728 ✗ mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1729 MAX_MP4_DESCR_COUNT);
1730
1731 ✗ for (pid = 0; pid < NB_PID_MAX; pid++) {
1732 ✗ if (!ts->pids[pid])
1733 ✗ continue;
1734 ✗ for (i = 0; i < mp4_descr_count; i++) {
1735 PESContext *pes;
1736 AVStream *st;
1737 FFStream *sti;
1738 FFIOContext pb;
1739 ✗ if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1740 ✗ continue;
1741 ✗ if (ts->pids[pid]->type != MPEGTS_PES) {
1742 ✗ av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1743 ✗ continue;
1744 }
1745 ✗ pes = ts->pids[pid]->u.pes_filter.opaque;
1746 ✗ st = pes->st;
1747 ✗ if (!st)
1748 ✗ continue;
1749 ✗ sti = ffstream(st);
1750
1751 ✗ pes->sl = mp4_descr[i].sl;
1752
1753 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1754 mp4_descr[i].dec_config_descr_len);
1755 ✗ ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1756 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1757 ✗ st->codecpar->extradata_size > 0)
1758 ✗ sti->need_parsing = 0;
1759 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1760 ✗ st->codecpar->extradata_size > 0)
1761 ✗ sti->need_parsing = 0;
1762
1763 ✗ st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1764 ✗ sti->need_context_update = 1;
1765 }
1766 }
1767 ✗ for (i = 0; i < mp4_descr_count; i++)
1768 ✗ av_free(mp4_descr[i].dec_config_descr);
1769 }
1770
1771 ✗ static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1772 int section_len)
1773 {
1774 ✗ AVProgram *prg = NULL;
1775 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1776
1777 ✗ int idx = ff_find_stream_index(ts->stream, filter->pid);
1778 ✗ if (idx < 0)
1779 ✗ return;
1780
1781 /**
1782 * In case we receive an SCTE-35 packet before mpegts context is fully
1783 * initialized.
1784 */
1785 ✗ if (!ts->pkt)
1786 ✗ return;
1787
1788 ✗ new_data_packet(section, section_len, ts->pkt);
1789 ✗ ts->pkt->stream_index = idx;
1790 ✗ prg = av_find_program_from_stream(ts->stream, NULL, idx);
1791 ✗ if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1792 ✗ MpegTSFilter *f = ts->pids[prg->pcr_pid];
1793 ✗ if (f && f->last_pcr != -1)
1794 ✗ ts->pkt->pts = ts->pkt->dts = f->last_pcr/SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1795 }
1796 ✗ ts->stop_parse = 1;
1797
1798 }
1799
1800 static const uint8_t opus_coupled_stream_cnt[9] = {
1801 1, 0, 1, 1, 2, 2, 2, 3, 3
1802 };
1803
1804 static const uint8_t opus_stream_cnt[9] = {
1805 1, 1, 1, 2, 2, 3, 4, 4, 5,
1806 };
1807
1808 static const uint8_t opus_channel_map[8][8] = {
1809 { 0 },
1810 { 0,1 },
1811 { 0,2,1 },
1812 { 0,1,2,3 },
1813 { 0,4,1,2,3 },
1814 { 0,4,1,2,3,5 },
1815 { 0,4,1,2,3,5,6 },
1816 { 0,6,1,2,3,4,5,7 },
1817 };
1818
1819 933 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1820 const uint8_t **pp, const uint8_t *desc_list_end,
1821 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1822 MpegTSContext *ts)
1823 {
1824 933 FFStream *const sti = ffstream(st);
1825 const uint8_t *desc_end;
1826 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1827 char language[252];
1828 int i;
1829
1830 933 desc_tag = get8(pp, desc_list_end);
1831
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 933 if (desc_tag < 0)
1832 559 return AVERROR_INVALIDDATA;
1833 374 desc_len = get8(pp, desc_list_end);
1834
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 374 if (desc_len < 0)
1835 ✗ return AVERROR_INVALIDDATA;
1836 374 desc_end = *pp + desc_len;
1837
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 374 if (desc_end > desc_list_end)
1838 ✗ return AVERROR_INVALIDDATA;
1839
1840 374 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1841
1842
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 374 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1843 stream_type == STREAM_TYPE_PRIVATE_DATA)
1844 16 mpegts_find_stream_type(st, desc_tag, DESC_types);
1845
1846
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 374 switch (desc_tag) {
1847 ✗ case VIDEO_STREAM_DESCRIPTOR:
1848 ✗ if (get8(pp, desc_end) & 0x1) {
1849 ✗ st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1850 }
1851 ✗ break;
1852 ✗ case SL_DESCRIPTOR:
1853 ✗ desc_es_id = get16(pp, desc_end);
1854 ✗ if (desc_es_id < 0)
1855 ✗ break;
1856 ✗ if (ts && ts->pids[pid])
1857 ✗ ts->pids[pid]->es_id = desc_es_id;
1858 ✗ for (i = 0; i < mp4_descr_count; i++)
1859 ✗ if (mp4_descr[i].dec_config_descr_len &&
1860 ✗ mp4_descr[i].es_id == desc_es_id) {
1861 FFIOContext pb;
1862 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1863 ✗ mp4_descr[i].dec_config_descr_len);
1864 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1865 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1866 ✗ st->codecpar->extradata_size > 0) {
1867 ✗ sti->need_parsing = 0;
1868 ✗ sti->need_context_update = 1;
1869 }
1870 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1871 ✗ mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1872 }
1873 ✗ break;
1874 ✗ case FMC_DESCRIPTOR:
1875 ✗ if (get16(pp, desc_end) < 0)
1876 ✗ break;
1877 ✗ if (mp4_descr_count > 0 &&
1878 ✗ (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1879 ✗ (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1880 ✗ sti->request_probe > 0) &&
1881 ✗ mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1882 FFIOContext pb;
1883 ✗ ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1884 mp4_descr->dec_config_descr_len);
1885 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1886 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1887 ✗ st->codecpar->extradata_size > 0) {
1888 ✗ sti->request_probe = sti->need_parsing = 0;
1889 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1890 ✗ sti->need_context_update = 1;
1891 }
1892 }
1893 ✗ break;
1894 ✗ case TELETEXT_DESCRIPTOR:
1895 {
1896 ✗ uint8_t *extradata = NULL;
1897 ✗ int language_count = desc_len / 5, ret;
1898
1899 ✗ if (desc_len > 0 && desc_len % 5 != 0)
1900 ✗ return AVERROR_INVALIDDATA;
1901
1902 ✗ if (language_count > 0) {
1903 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1904 ✗ av_assert0(language_count <= sizeof(language) / 4);
1905
1906 ✗ if (st->codecpar->extradata == NULL) {
1907 ✗ ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1908 ✗ if (ret < 0)
1909 ✗ return ret;
1910 }
1911
1912 ✗ if (st->codecpar->extradata_size < language_count * 2)
1913 ✗ return AVERROR_INVALIDDATA;
1914
1915 ✗ extradata = st->codecpar->extradata;
1916
1917 ✗ for (i = 0; i < language_count; i++) {
1918 ✗ language[i * 4 + 0] = get8(pp, desc_end);
1919 ✗ language[i * 4 + 1] = get8(pp, desc_end);
1920 ✗ language[i * 4 + 2] = get8(pp, desc_end);
1921 ✗ language[i * 4 + 3] = ',';
1922
1923 ✗ memcpy(extradata, *pp, 2);
1924 ✗ extradata += 2;
1925
1926 ✗ *pp += 2;
1927 }
1928
1929 ✗ language[i * 4 - 1] = 0;
1930 ✗ av_dict_set(&st->metadata, "language", language, 0);
1931 ✗ sti->need_context_update = 1;
1932 }
1933 }
1934 ✗ break;
1935 9 case SUBTITLING_DESCRIPTOR:
1936 {
1937 /* 8 bytes per DVB subtitle substream data:
1938 * ISO_639_language_code (3 bytes),
1939 * subtitling_type (1 byte),
1940 * composition_page_id (2 bytes),
1941 * ancillary_page_id (2 bytes) */
1942 9 int language_count = desc_len / 8, ret;
1943
1944
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 9 if (desc_len > 0 && desc_len % 8 != 0)
1945 ✗ return AVERROR_INVALIDDATA;
1946
1947
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 9 if (language_count > 1) {
1948 ✗ avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1949 }
1950
1951
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 9 if (language_count > 0) {
1952 uint8_t *extradata;
1953
1954 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1955
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 9 av_assert0(language_count <= sizeof(language) / 4);
1956
1957
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 9 if (st->codecpar->extradata == NULL) {
1958 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1959
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 3 if (ret < 0)
1960 ✗ return ret;
1961 }
1962
1963
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 9 if (st->codecpar->extradata_size < language_count * 5)
1964 ✗ return AVERROR_INVALIDDATA;
1965
1966 9 extradata = st->codecpar->extradata;
1967
1968
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 18 for (i = 0; i < language_count; i++) {
1969 9 language[i * 4 + 0] = get8(pp, desc_end);
1970 9 language[i * 4 + 1] = get8(pp, desc_end);
1971 9 language[i * 4 + 2] = get8(pp, desc_end);
1972 9 language[i * 4 + 3] = ',';
1973
1974 /* hearing impaired subtitles detection using subtitling_type */
1975
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 9 switch (*pp[0]) {
1976 ✗ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1977 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1978 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1979 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1980 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1981 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1982 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1983 ✗ break;
1984 }
1985
1986 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1987 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1988 9 extradata += 5;
1989
1990 9 *pp += 4;
1991 }
1992
1993 9 language[i * 4 - 1] = 0;
1994 9 av_dict_set(&st->metadata, "language", language, 0);
1995 9 sti->need_context_update = 1;
1996 }
1997 }
1998 9 break;
1999 252 case ISO_639_LANGUAGE_DESCRIPTOR:
2000
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 498 for (i = 0; i + 4 <= desc_len; i += 4) {
2001 246 language[i + 0] = get8(pp, desc_end);
2002 246 language[i + 1] = get8(pp, desc_end);
2003 246 language[i + 2] = get8(pp, desc_end);
2004 246 language[i + 3] = ',';
2005
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 246 switch (get8(pp, desc_end)) {
2006 ✗ case 0x01:
2007 ✗ st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2008 ✗ break;
2009 ✗ case 0x02:
2010 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2011 ✗ break;
2012 60 case 0x03:
2013 60 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2014 60 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2015 60 break;
2016 }
2017 }
2018
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 252 if (i && language[0]) {
2019 242 language[i - 1] = 0;
2020 /* don't overwrite language, as it may already have been set by
2021 * another, more specific descriptor (e.g. supplementary audio) */
2022 242 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2023 }
2024 252 break;
2025 8 case REGISTRATION_DESCRIPTOR:
2026 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2027 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2028
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 8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2029 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2030
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 3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2031 2 sti->request_probe = 50;
2032 }
2033 8 break;
2034 31 case STREAM_IDENTIFIER_DESCRIPTOR:
2035 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2036 31 break;
2037 4 case METADATA_DESCRIPTOR:
2038
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✗ Branch 2 not taken.
 4 if (get16(pp, desc_end) == 0xFFFF)
2039 4 *pp += 4;
2040
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 4 if (get8(pp, desc_end) == 0xFF) {
2041 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2042
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2043 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2044 }
2045 4 break;
2046 4 case EXTENSION_DESCRIPTOR: /* DVB extension descriptor */
2047 4 ext_desc_tag = get8(pp, desc_end);
2048
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 4 if (ext_desc_tag < 0)
2049 ✗ return AVERROR_INVALIDDATA;
2050
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✗ Branch 3 not taken.
 4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2051 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2052
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 3 if (!st->codecpar->extradata) {
2053 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2054 AV_INPUT_BUFFER_PADDING_SIZE);
2055
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 1 if (!st->codecpar->extradata)
2056 ✗ return AVERROR(ENOMEM);
2057
2058 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2059 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2060
2061 1 channel_config_code = get8(pp, desc_end);
2062
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 1 if (channel_config_code < 0)
2063 ✗ return AVERROR_INVALIDDATA;
2064
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 1 if (channel_config_code <= 0x8) {
2065
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 1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2066 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2067
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 1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2068 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2069 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2070 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2071
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 1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2072 } else {
2073 ✗ avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2074 }
2075 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2076 1 sti->need_context_update = 1;
2077 }
2078 }
2079
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 4 if (ext_desc_tag == SUPPLEMENTARY_AUDIO_DESCRIPTOR) {
2080 int flags;
2081
2082 ✗ if (desc_len < 1)
2083 ✗ return AVERROR_INVALIDDATA;
2084 ✗ flags = get8(pp, desc_end);
2085
2086 ✗ if ((flags & 0x80) == 0) /* mix_type */
2087 ✗ st->disposition |= AV_DISPOSITION_DEPENDENT;
2088
2089 ✗ switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2090 ✗ case 0x01:
2091 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2092 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2093 ✗ break;
2094 ✗ case 0x02:
2095 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2096 ✗ break;
2097 ✗ case 0x03:
2098 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2099 ✗ break;
2100 }
2101
2102 ✗ if (flags & 0x01) { /* language_code_present */
2103 ✗ if (desc_len < 4)
2104 ✗ return AVERROR_INVALIDDATA;
2105 ✗ language[0] = get8(pp, desc_end);
2106 ✗ language[1] = get8(pp, desc_end);
2107 ✗ language[2] = get8(pp, desc_end);
2108 ✗ language[3] = 0;
2109
2110 /* This language always has to override a possible
2111 * ISO 639 language descriptor language */
2112 ✗ if (language[0])
2113 ✗ av_dict_set(&st->metadata, "language", language, 0);
2114 }
2115 }
2116 4 break;
2117 6 case AC3_DESCRIPTOR:
2118 {
2119 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2120
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 6 if (component_type_flag) {
2121 ✗ int component_type = get8(pp, desc_end);
2122 ✗ int service_type_mask = 0x38; // 0b00111000
2123 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2124 ✗ if (service_type == 0x02 /* 0b010 */) {
2125 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2126 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2127 }
2128 }
2129 }
2130 6 break;
2131 ✗ case ENHANCED_AC3_DESCRIPTOR:
2132 {
2133 ✗ int component_type_flag = get8(pp, desc_end) & (1 << 7);
2134 ✗ if (component_type_flag) {
2135 ✗ int component_type = get8(pp, desc_end);
2136 ✗ int service_type_mask = 0x38; // 0b00111000
2137 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2138 ✗ if (service_type == 0x02 /* 0b010 */) {
2139 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2140 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2141 }
2142 }
2143 }
2144 ✗ break;
2145 ✗ case DATA_COMPONENT_DESCRIPTOR:
2146 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2147 // for captions
2148 ✗ if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2149 // This structure is defined in STD-B10, part 1, listing 5.4 and
2150 // part 2, 6.2.20).
2151 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2152 // Component tag limits are documented in TR-B14, fascicle 2,
2153 // Vol. 3, Section 2, 4.2.8.1
2154 ✗ int actual_component_tag = sti->stream_identifier - 1;
2155 ✗ int picked_profile = AV_PROFILE_UNKNOWN;
2156 ✗ int data_component_id = get16(pp, desc_end);
2157 ✗ if (data_component_id < 0)
2158 ✗ return AVERROR_INVALIDDATA;
2159
2160 ✗ switch (data_component_id) {
2161 ✗ case 0x0008:
2162 // [0x30..0x37] are component tags utilized for
2163 // non-mobile captioning service ("profile A").
2164 ✗ if (actual_component_tag >= 0x30 &&
2165 actual_component_tag <= 0x37) {
2166 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2167 }
2168 ✗ break;
2169 ✗ case 0x0012:
2170 // component tag 0x87 signifies a mobile/partial reception
2171 // (1seg) captioning service ("profile C").
2172 ✗ if (actual_component_tag == 0x87) {
2173 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_C;
2174 }
2175 ✗ break;
2176 ✗ default:
2177 ✗ break;
2178 }
2179
2180 ✗ if (picked_profile == AV_PROFILE_UNKNOWN)
2181 ✗ break;
2182
2183 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2184 ✗ st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2185 ✗ if (st->codecpar->profile != picked_profile) {
2186 ✗ st->codecpar->profile = picked_profile;
2187 ✗ sti->need_context_update = 1;
2188 }
2189 ✗ sti->request_probe = 0;
2190 ✗ sti->need_parsing = 0;
2191 }
2192 ✗ break;
2193 ✗ case DOVI_VIDEO_STREAM_DESCRIPTOR:
2194 {
2195 uint32_t buf;
2196 AVDOVIDecoderConfigurationRecord *dovi;
2197 size_t dovi_size;
2198 ✗ int dependency_pid = -1; // Unset
2199
2200 ✗ if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2201 ✗ return AVERROR_INVALIDDATA;
2202
2203 ✗ dovi = av_dovi_alloc(&dovi_size);
2204 ✗ if (!dovi)
2205 ✗ return AVERROR(ENOMEM);
2206
2207 ✗ dovi->dv_version_major = get8(pp, desc_end);
2208 ✗ dovi->dv_version_minor = get8(pp, desc_end);
2209 ✗ buf = get16(pp, desc_end);
2210 ✗ dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2211 ✗ dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2212 ✗ dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2213 ✗ dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2214 ✗ dovi->bl_present_flag = buf & 0x01; // 1 bit
2215 ✗ if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
2216 ✗ buf = get16(pp, desc_end);
2217 ✗ dependency_pid = buf >> 3; // 13 bits
2218 }
2219 ✗ if (desc_end - *pp >= 1) { // 8 bits
2220 ✗ buf = get8(pp, desc_end);
2221 ✗ dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2222 ✗ dovi->dv_md_compression = (buf >> 2) & 0x03; // 2 bits
2223 } else {
2224 // 0 stands for None
2225 // Dolby Vision V1.2.93 profiles and levels
2226 ✗ dovi->dv_bl_signal_compatibility_id = 0;
2227 ✗ dovi->dv_md_compression = AV_DOVI_COMPRESSION_NONE;
2228 }
2229
2230 ✗ if (!av_packet_side_data_add(&st->codecpar->coded_side_data,
2231 ✗ &st->codecpar->nb_coded_side_data,
2232 AV_PKT_DATA_DOVI_CONF,
2233 (uint8_t *)dovi, dovi_size, 0)) {
2234 ✗ av_free(dovi);
2235 ✗ return AVERROR(ENOMEM);
2236 }
2237
2238 ✗ av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2239 "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, "
2240 "compatibility id: %d, compression: %d\n",
2241 ✗ dovi->dv_version_major, dovi->dv_version_minor,
2242 ✗ dovi->dv_profile, dovi->dv_level,
2243 ✗ dovi->rpu_present_flag,
2244 ✗ dovi->el_present_flag,
2245 ✗ dovi->bl_present_flag,
2246 dependency_pid,
2247 ✗ dovi->dv_bl_signal_compatibility_id,
2248 ✗ dovi->dv_md_compression);
2249 }
2250 ✗ break;
2251 60 default:
2252 60 break;
2253 }
2254 374 *pp = desc_end;
2255 374 return 0;
2256 }
2257
2258 12 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2259 int stream_identifier, int pmt_stream_idx, struct Program *p)
2260 {
2261 12 AVFormatContext *s = ts->stream;
2262 12 AVStream *found = NULL;
2263
2264
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✓ Branch 1 taken 12 times.
 12 if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2265 ✗ for (int i = 0; i < p->nb_streams; i++) {
2266 ✗ if (p->streams[i].stream_identifier == stream_identifier)
2267 ✗ if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2268 ✗ found = s->streams[p->streams[i].idx];
2269 }
2270
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 12 } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2271 7 found = s->streams[p->streams[pmt_stream_idx].idx];
2272 }
2273
2274
2/2
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 12 if (found) {
2275 7 av_log(ts->stream, AV_LOG_VERBOSE,
2276 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2277 7 av_get_media_type_string(found->codecpar->codec_type),
2278 found->index, found->id, pid);
2279 }
2280
2281 12 return found;
2282 }
2283
2284 559 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2285 {
2286 559 const uint8_t **pp = &p;
2287 const uint8_t *desc_list_end;
2288 const uint8_t *desc_end;
2289 int desc_list_len;
2290 int desc_len, desc_tag;
2291
2292 559 desc_list_len = get16(pp, p_end);
2293
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✓ Branch 1 taken 559 times.
 559 if (desc_list_len < 0)
2294 ✗ return -1;
2295 559 desc_list_len &= 0xfff;
2296 559 desc_list_end = p + desc_list_len;
2297
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✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2298 ✗ return -1;
2299
2300 while (1) {
2301 893 desc_tag = get8(pp, desc_list_end);
2302
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✓ Branch 1 taken 362 times.
 893 if (desc_tag < 0)
2303 531 return -1;
2304 362 desc_len = get8(pp, desc_list_end);
2305
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 362 times.
 362 if (desc_len < 0)
2306 ✗ return -1;
2307 362 desc_end = *pp + desc_len;
2308
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 362 times.
 362 if (desc_end > desc_list_end)
2309 ✗ return -1;
2310
2311
2/2
✓ Branch 0 taken 28 times.
✓ Branch 1 taken 334 times.
 362 if (desc_tag == STREAM_IDENTIFIER_DESCRIPTOR) {
2312 28 return get8(pp, desc_end);
2313 }
2314 334 *pp = desc_end;
2315 }
2316
2317 return -1;
2318 }
2319
2320 139 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2321 {
2322
2/3
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
✓ Branch 2 taken 109 times.
 139 switch (stream_type) {
2323 ✗ case STREAM_TYPE_PRIVATE_SECTION:
2324 case STREAM_TYPE_ISO_IEC_14496_SECTION:
2325 ✗ return 0;
2326 30 case STREAM_TYPE_SCTE_DATA_SCTE_35:
2327 /* This User Private stream_type value is used by multiple organizations
2328 for different things. ANSI/SCTE 35 splice_info_section() is a
2329 private_section() not a PES_packet(). */
2330 30 return !(prog_reg_desc == AV_RL32("CUEI"));
2331 109 default:
2332 109 return 1;
2333 }
2334 }
2335
2336 2981 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2337 {
2338 2981 MpegTSContext *ts = filter->u.section_filter.opaque;
2339 2981 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2340 struct Program old_program;
2341 2981 SectionHeader h1, *h = &h1;
2342 PESContext *pes;
2343 AVStream *st;
2344 const uint8_t *p, *p_end, *desc_list_end;
2345 int program_info_length, pcr_pid, pid, stream_type;
2346 int desc_list_len;
2347 2981 uint32_t prog_reg_desc = 0; /* registration descriptor */
2348 2981 int stream_identifier = -1;
2349 struct Program *prg;
2350
2351 2981 int mp4_descr_count = 0;
2352 2981 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2353 int i;
2354
2355 2981 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2356 hex_dump_debug(ts->stream, section, section_len);
2357
2358 2981 p_end = section + section_len - 4;
2359 2981 p = section;
2360
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 2981 times.
 2981 if (parse_section_header(h, &p, p_end) < 0)
2361 2710 return;
2362
2/2
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✓ Branch 1 taken 2906 times.
 2981 if (h->tid != PMT_TID)
2363 75 return;
2364
1/2
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✓ Branch 1 taken 2906 times.
 2906 if (!h->current_next)
2365 ✗ return;
2366
2/2
✓ Branch 1 taken 2635 times.
✓ Branch 2 taken 271 times.
 2906 if (skip_identical(h, tssf))
2367 2635 return;
2368
2369 271 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2370 271 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2371
2372
1/4
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✓ Branch 1 taken 271 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (!ts->scan_all_pmts && ts->skip_changes)
2373 ✗ return;
2374
2375 271 prg = get_program(ts, h->id);
2376
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (prg)
2377 271 old_program = *prg;
2378 else
2379 ✗ clear_program(&old_program);
2380
2381
1/4
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✓ Branch 1 taken 271 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (ts->skip_unknown_pmt && !prg)
2382 ✗ return;
2383
3/6
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✗ Branch 1 not taken.
✓ Branch 2 taken 271 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 271 times.
 271 if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2384 ✗ return;
2385
2/2
✓ Branch 0 taken 172 times.
✓ Branch 1 taken 99 times.
 271 if (!ts->skip_clear)
2386 172 clear_avprogram(ts, h->id);
2387 271 clear_program(prg);
2388 271 add_pid_to_program(prg, ts->current_pid);
2389
2390 271 pcr_pid = get16(&p, p_end);
2391
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (pcr_pid < 0)
2392 ✗ return;
2393 271 pcr_pid &= 0x1fff;
2394 271 add_pid_to_program(prg, pcr_pid);
2395 271 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2396
2397 271 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2398
2399 271 program_info_length = get16(&p, p_end);
2400
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (program_info_length < 0)
2401 ✗ return;
2402 271 program_info_length &= 0xfff;
2403
2/2
✓ Branch 0 taken 246 times.
✓ Branch 1 taken 271 times.
 517 while (program_info_length >= 2) {
2404 uint8_t tag, len;
2405 246 tag = get8(&p, p_end);
2406 246 len = get8(&p, p_end);
2407
2408 246 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2409
2410 246 program_info_length -= 2;
2411
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (len > program_info_length)
2412 // something else is broken, exit the program_descriptors_loop
2413 ✗ break;
2414 246 program_info_length -= len;
2415
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (tag == IOD_DESCRIPTOR) {
2416 ✗ get8(&p, p_end); // scope
2417 ✗ get8(&p, p_end); // label
2418 ✗ len -= 2;
2419 ✗ mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2420 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2421
3/4
✓ Branch 0 taken 120 times.
✓ Branch 1 taken 126 times.
✓ Branch 2 taken 120 times.
✗ Branch 3 not taken.
 246 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2422 120 prog_reg_desc = bytestream_get_le32(&p);
2423 120 len -= 4;
2424 }
2425 246 p += len;
2426 }
2427 271 p += program_info_length;
2428
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (p >= p_end)
2429 ✗ goto out;
2430
2431 // stop parsing after pmt, we found header
2432
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 216 times.
 271 if (!ts->pkt)
2433 55 ts->stop_parse = 2;
2434
2435
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (prg)
2436 271 prg->pmt_found = 1;
2437
2438
1/2
✓ Branch 0 taken 830 times.
✗ Branch 1 not taken.
 830 for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2439 830 st = 0;
2440 830 pes = NULL;
2441 830 stream_type = get8(&p, p_end);
2442
2/2
✓ Branch 0 taken 271 times.
✓ Branch 1 taken 559 times.
 830 if (stream_type < 0)
2443 271 break;
2444 559 pid = get16(&p, p_end);
2445
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid < 0)
2446 ✗ goto out;
2447 559 pid &= 0x1fff;
2448
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid == ts->current_pid)
2449 ✗ goto out;
2450
2451 559 stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2452
2453 /* now create stream */
2454
4/4
✓ Branch 0 taken 440 times.
✓ Branch 1 taken 119 times.
✓ Branch 2 taken 420 times.
✓ Branch 3 taken 20 times.
 559 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2455 420 pes = ts->pids[pid]->u.pes_filter.opaque;
2456
3/4
✓ Branch 0 taken 16 times.
✓ Branch 1 taken 404 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 16 times.
 420 if (ts->merge_pmt_versions && !pes->st) {
2457 ✗ st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2458 ✗ if (st) {
2459 ✗ pes->st = st;
2460 ✗ pes->stream_type = stream_type;
2461 ✗ pes->merged_st = 1;
2462 }
2463 }
2464
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 420 times.
 420 if (!pes->st) {
2465 ✗ pes->st = avformat_new_stream(pes->stream, NULL);
2466 ✗ if (!pes->st)
2467 ✗ goto out;
2468 ✗ pes->st->id = pes->pid;
2469 }
2470 420 st = pes->st;
2471
2/2
✓ Branch 1 taken 109 times.
✓ Branch 2 taken 30 times.
 139 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2472
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 109 times.
 109 if (ts->pids[pid])
2473 ✗ mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2474 109 pes = add_pes_stream(ts, pid, pcr_pid);
2475
4/6
✓ Branch 0 taken 8 times.
✓ Branch 1 taken 101 times.
✓ Branch 2 taken 8 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 8 times.
✗ Branch 5 not taken.
 109 if (ts->merge_pmt_versions && pes && !pes->st) {
2476 8 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2477
2/2
✓ Branch 0 taken 4 times.
✓ Branch 1 taken 4 times.
 8 if (st) {
2478 4 pes->st = st;
2479 4 pes->stream_type = stream_type;
2480 4 pes->merged_st = 1;
2481 }
2482 }
2483
3/4
✓ Branch 0 taken 109 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 105 times.
✓ Branch 3 taken 4 times.
 109 if (pes && !pes->st) {
2484 105 st = avformat_new_stream(pes->stream, NULL);
2485
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 105 times.
 105 if (!st)
2486 ✗ goto out;
2487 105 st->id = pes->pid;
2488 }
2489 } else {
2490 30 int idx = ff_find_stream_index(ts->stream, pid);
2491
2/2
✓ Branch 0 taken 20 times.
✓ Branch 1 taken 10 times.
 30 if (idx >= 0) {
2492 20 st = ts->stream->streams[idx];
2493 }
2494
4/4
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 24 times.
✓ Branch 2 taken 4 times.
✓ Branch 3 taken 2 times.
 30 if (ts->merge_pmt_versions && !st) {
2495 4 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2496 }
2497
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 23 times.
 30 if (!st) {
2498 7 st = avformat_new_stream(ts->stream, NULL);
2499
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 7 times.
 7 if (!st)
2500 ✗ goto out;
2501 7 st->id = pid;
2502 7 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2503
2/4
✓ Branch 0 taken 7 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 7 times.
✗ Branch 3 not taken.
 7 if (stream_type == STREAM_TYPE_SCTE_DATA_SCTE_35 && prog_reg_desc == AV_RL32("CUEI")) {
2504 7 mpegts_find_stream_type(st, stream_type, SCTE_types);
2505 7 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2506 }
2507 }
2508 }
2509
2510
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (!st)
2511 ✗ goto out;
2512
2513
4/4
✓ Branch 0 taken 529 times.
✓ Branch 1 taken 30 times.
✓ Branch 2 taken 115 times.
✓ Branch 3 taken 414 times.
 559 if (pes && pes->stream_type != stream_type)
2514 115 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2515
2516 559 add_pid_to_program(prg, pid);
2517
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (prg) {
2518 559 prg->streams[i].idx = st->index;
2519 559 prg->streams[i].stream_identifier = stream_identifier;
2520 559 prg->nb_streams++;
2521 }
2522
2523 559 av_program_add_stream_index(ts->stream, h->id, st->index);
2524
2525 559 desc_list_len = get16(&p, p_end);
2526
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (desc_list_len < 0)
2527 ✗ goto out;
2528 559 desc_list_len &= 0xfff;
2529 559 desc_list_end = p + desc_list_len;
2530
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2531 ✗ goto out;
2532 for (;;) {
2533
2/2
✓ Branch 1 taken 559 times.
✓ Branch 2 taken 370 times.
 929 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2534 desc_list_end, mp4_descr,
2535 mp4_descr_count, pid, ts) < 0)
2536 559 break;
2537
2538
2/6
✓ Branch 0 taken 370 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 370 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 370 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2539 ✗ stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD && pes->sub_st) {
2540 ✗ av_program_add_stream_index(ts->stream, h->id,
2541 ✗ pes->sub_st->index);
2542 ✗ pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2543 }
2544 }
2545 559 p = desc_list_end;
2546 }
2547
2548
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (!ts->pids[pcr_pid])
2549 ✗ mpegts_open_pcr_filter(ts, pcr_pid);
2550
2551 271 out:
2552
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 for (i = 0; i < mp4_descr_count; i++)
2553 ✗ av_free(mp4_descr[i].dec_config_descr);
2554 }
2555
2556 3008 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2557 {
2558 3008 MpegTSContext *ts = filter->u.section_filter.opaque;
2559 3008 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2560 3008 SectionHeader h1, *h = &h1;
2561 const uint8_t *p, *p_end;
2562 int sid, pmt_pid;
2563 3008 int nb_prg = 0;
2564 AVProgram *program;
2565
2566 3008 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2567 hex_dump_debug(ts->stream, section, section_len);
2568
2569 3008 p_end = section + section_len - 4;
2570 3008 p = section;
2571
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3008 times.
 3008 if (parse_section_header(h, &p, p_end) < 0)
2572 2795 return;
2573
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3008 times.
 3008 if (h->tid != PAT_TID)
2574 ✗ return;
2575
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3008 times.
 3008 if (!h->current_next)
2576 ✗ return;
2577
2/2
✓ Branch 0 taken 536 times.
✓ Branch 1 taken 2472 times.
 3008 if (ts->skip_changes)
2578 536 return;
2579
2580
2/2
✓ Branch 1 taken 2259 times.
✓ Branch 2 taken 213 times.
 2472 if (skip_identical(h, tssf))
2581 2259 return;
2582 213 ts->id = h->id;
2583
2584 for (;;) {
2585 426 sid = get16(&p, p_end);
2586
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 if (sid < 0)
2587 213 break;
2588 213 pmt_pid = get16(&p, p_end);
2589
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid < 0)
2590 ✗ break;
2591 213 pmt_pid &= 0x1fff;
2592
2593
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid == ts->current_pid)
2594 ✗ break;
2595
2596 213 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2597
2598
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid == 0x0000) {
2599 /* NIT info */
2600 } else {
2601 213 MpegTSFilter *fil = ts->pids[pmt_pid];
2602 struct Program *prg;
2603 213 program = av_new_program(ts->stream, sid);
2604
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (program) {
2605 213 program->program_num = sid;
2606 213 program->pmt_pid = pmt_pid;
2607 }
2608
2/2
✓ Branch 0 taken 158 times.
✓ Branch 1 taken 55 times.
 213 if (fil)
2609
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 if ( fil->type != MPEGTS_SECTION
2610
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 || fil->pid != pmt_pid
2611
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 158 times.
 158 || fil->u.section_filter.section_cb != pmt_cb)
2612 ✗ mpegts_close_filter(ts, ts->pids[pmt_pid]);
2613
2614
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 158 times.
 213 if (!ts->pids[pmt_pid])
2615 55 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2616 213 prg = add_program(ts, sid);
2617
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg) {
2618 213 unsigned prg_idx = prg - ts->prg;
2619
3/4
✓ Branch 0 taken 158 times.
✓ Branch 1 taken 55 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 158 times.
 213 if (prg->nb_pids && prg->pids[0] != pmt_pid)
2620 ✗ clear_program(prg);
2621 213 add_pid_to_program(prg, pmt_pid);
2622
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (prg_idx > nb_prg)
2623 ✗ FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2624
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg_idx >= nb_prg)
2625 213 nb_prg++;
2626 } else
2627 ✗ nb_prg = 0;
2628 }
2629 }
2630 213 ts->nb_prg = nb_prg;
2631
2632
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid < 0) {
2633 int i,j;
2634
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 for (j=0; j<ts->stream->nb_programs; j++) {
2635
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 for (i = 0; i < ts->nb_prg; i++)
2636
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (ts->prg[i].id == ts->stream->programs[j]->id)
2637 213 break;
2638
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 213 if (i==ts->nb_prg && !ts->skip_clear)
2639 ✗ clear_avprogram(ts, ts->stream->programs[j]->id);
2640 }
2641 }
2642 }
2643
2644 14 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2645 {
2646 14 MpegTSContext *ts = filter->u.section_filter.opaque;
2647 const uint8_t *p, *p_end;
2648 14 SectionHeader h1, *h = &h1;
2649
2650 /*
2651 * Sometimes we receive EPG packets but SDT table do not have
2652 * eit_pres_following or eit_sched turned on, so we open EPG
2653 * stream directly here.
2654 */
2655
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 11 times.
 14 if (!ts->epg_stream) {
2656 3 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2657
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
 3 if (!ts->epg_stream)
2658 2 return;
2659 3 ts->epg_stream->id = EIT_PID;
2660 3 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2661 3 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2662 }
2663
2664
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 12 times.
 14 if (ts->epg_stream->discard == AVDISCARD_ALL)
2665 2 return;
2666
2667 12 p_end = section + section_len - 4;
2668 12 p = section;
2669
2670
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 12 times.
 12 if (parse_section_header(h, &p, p_end) < 0)
2671 ✗ return;
2672
2/4
✓ Branch 0 taken 12 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 12 times.
 12 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2673 ✗ return;
2674
2675 12 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2676
2677 /**
2678 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2679 * is scrambled.
2680 */
2681
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (h->id == 0xFFFF) {
2682 ✗ av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2683 ✗ return;
2684 }
2685
2686 /**
2687 * In case we receive an EPG packet before mpegts context is fully
2688 * initialized.
2689 */
2690
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (!ts->pkt)
2691 ✗ return;
2692
2693 12 new_data_packet(section, section_len, ts->pkt);
2694 12 ts->pkt->stream_index = ts->epg_stream->index;
2695 12 ts->stop_parse = 1;
2696 }
2697
2698 442 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2699 {
2700 442 MpegTSContext *ts = filter->u.section_filter.opaque;
2701 442 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2702 442 SectionHeader h1, *h = &h1;
2703 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2704 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2705 char *name, *provider_name;
2706
2707 442 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2708 hex_dump_debug(ts->stream, section, section_len);
2709
2710 442 p_end = section + section_len - 4;
2711 442 p = section;
2712
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 442 if (parse_section_header(h, &p, p_end) < 0)
2713 342 return;
2714
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 442 if (h->tid != SDT_TID)
2715 ✗ return;
2716
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 442 if (!h->current_next)
2717 ✗ return;
2718
2/2
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 442 if (ts->skip_changes)
2719 55 return;
2720
2/2
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✓ Branch 2 taken 100 times.
 387 if (skip_identical(h, tssf))
2721 287 return;
2722
2723 100 onid = get16(&p, p_end);
2724
1/2
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 100 if (onid < 0)
2725 ✗ return;
2726 100 val = get8(&p, p_end);
2727
1/2
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✗ Branch 1 not taken.
 100 if (val < 0)
2728 ✗ return;
2729 for (;;) {
2730 200 sid = get16(&p, p_end);
2731
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✓ Branch 1 taken 100 times.
 200 if (sid < 0)
2732 100 break;
2733 100 val = get8(&p, p_end);
2734
1/2
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 100 if (val < 0)
2735 ✗ break;
2736 100 desc_list_len = get16(&p, p_end);
2737
1/2
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✓ Branch 1 taken 100 times.
 100 if (desc_list_len < 0)
2738 ✗ break;
2739 100 desc_list_len &= 0xfff;
2740 100 desc_list_end = p + desc_list_len;
2741
1/2
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✗ Branch 1 not taken.
 100 if (desc_list_end > p_end)
2742 ✗ break;
2743 for (;;) {
2744 200 desc_tag = get8(&p, desc_list_end);
2745
2/2
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✓ Branch 1 taken 100 times.
 200 if (desc_tag < 0)
2746 100 break;
2747 100 desc_len = get8(&p, desc_list_end);
2748 100 desc_end = p + desc_len;
2749
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 100 if (desc_len < 0 || desc_end > desc_list_end)
2750 break;
2751
2752 100 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2753 desc_tag, desc_len);
2754
2755
1/2
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✗ Branch 1 not taken.
 100 switch (desc_tag) {
2756 100 case SERVICE_DESCRIPTOR:
2757 100 service_type = get8(&p, desc_end);
2758
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✓ Branch 1 taken 100 times.
 100 if (service_type < 0)
2759 ✗ break;
2760 100 provider_name = getstr8(&p, desc_end);
2761
1/2
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✓ Branch 1 taken 100 times.
 100 if (!provider_name)
2762 ✗ break;
2763 100 name = getstr8(&p, desc_end);
2764
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✗ Branch 1 not taken.
 100 if (name) {
2765 100 AVProgram *program = av_new_program(ts->stream, sid);
2766
1/2
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✗ Branch 1 not taken.
 100 if (program) {
2767 100 av_dict_set(&program->metadata, "service_name", name, 0);
2768 100 av_dict_set(&program->metadata, "service_provider",
2769 provider_name, 0);
2770 }
2771 }
2772 100 av_free(name);
2773 100 av_free(provider_name);
2774 100 break;
2775 ✗ default:
2776 ✗ break;
2777 }
2778 100 p = desc_end;
2779 }
2780 100 p = desc_list_end;
2781 }
2782 }
2783
2784 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2785 const uint8_t *packet);
2786
2787 /* handle one TS packet */
2788 397912 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2789 {
2790 MpegTSFilter *tss;
2791 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2792 has_adaptation, has_payload;
2793 const uint8_t *p, *p_end;
2794
2795 397912 pid = AV_RB16(packet + 1) & 0x1fff;
2796 397912 is_start = packet[1] & 0x40;
2797 397912 tss = ts->pids[pid];
2798
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✓ Branch 3 taken 383130 times.
✓ Branch 4 taken 17 times.
✓ Branch 5 taken 6754 times.
 397912 if (ts->auto_guess && !tss && is_start) {
2799 17 add_pes_stream(ts, pid, -1);
2800 17 tss = ts->pids[pid];
2801 }
2802
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✓ Branch 1 taken 383288 times.
 397912 if (!tss)
2803 14624 return 0;
2804
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✓ Branch 1 taken 347261 times.
 383288 if (is_start)
2805 36027 tss->discard = discard_pid(ts, pid);
2806
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 383288 if (tss->discard)
2807 ✗ return 0;
2808 383288 ts->current_pid = pid;
2809
2810 383288 afc = (packet[3] >> 4) & 3;
2811
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 383288 if (afc == 0) /* reserved value */
2812 ✗ return 0;
2813 383288 has_adaptation = afc & 2;
2814 383288 has_payload = afc & 1;
2815 442634 is_discontinuity = has_adaptation &&
2816
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✓ Branch 3 taken 38 times.
 442596 packet[4] != 0 && /* with length > 0 */
2817
1/2
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 59308 (packet[5] & 0x80); /* and discontinuity indicated */
2818
2819 /* continuity check (currently not used) */
2820 383288 cc = (packet[3] & 0xf);
2821
2/2
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✓ Branch 1 taken 2842 times.
 383288 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2822
1/2
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✗ Branch 1 not taken.
 383288 cc_ok = pid == NULL_PID ||
2823 383288 is_discontinuity ||
2824
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✓ Branch 4 taken 381492 times.
✓ Branch 5 taken 648 times.
 766576 tss->last_cc < 0 ||
2825 expected_cc == cc;
2826
2827 383288 tss->last_cc = cc;
2828
2/2
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✓ Branch 1 taken 382640 times.
 383288 if (!cc_ok) {
2829 648 av_log(ts->stream, AV_LOG_DEBUG,
2830 "Continuity check failed for pid %d expected %d got %d\n",
2831 pid, expected_cc, cc);
2832
2/2
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✓ Branch 1 taken 641 times.
 648 if (tss->type == MPEGTS_PES) {
2833 7 PESContext *pc = tss->u.pes_filter.opaque;
2834 7 pc->flags |= AV_PKT_FLAG_CORRUPT;
2835 }
2836 }
2837
2838
2/2
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✓ Branch 1 taken 383276 times.
 383288 if (packet[1] & 0x80) {
2839 12 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2840
1/2
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✗ Branch 1 not taken.
 12 if (tss->type == MPEGTS_PES) {
2841 12 PESContext *pc = tss->u.pes_filter.opaque;
2842 12 pc->flags |= AV_PKT_FLAG_CORRUPT;
2843 }
2844 }
2845
2846 383288 p = packet + 4;
2847
2/2
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✓ Branch 1 taken 323942 times.
 383288 if (has_adaptation) {
2848 int64_t pcr_h;
2849 int pcr_l;
2850
2/2
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✓ Branch 2 taken 31868 times.
 59346 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2851 27478 tss->last_pcr = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
2852 /* skip adaptation field */
2853 59346 p += p[0] + 1;
2854 }
2855 /* if past the end of packet, ignore */
2856 383288 p_end = packet + TS_PACKET_SIZE;
2857
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✗ Branch 2 not taken.
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 383288 if (p >= p_end || !has_payload)
2858 2854 return 0;
2859
2860
1/2
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✗ Branch 1 not taken.
 380434 if (pos >= 0) {
2861
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 380434 av_assert0(pos >= TS_PACKET_SIZE);
2862 380434 ts->pos47_full = pos - TS_PACKET_SIZE;
2863 }
2864
2865
2/2
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✓ Branch 1 taken 373954 times.
 380434 if (tss->type == MPEGTS_SECTION) {
2866
2/2
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✓ Branch 1 taken 35 times.
 6480 if (is_start) {
2867 /* pointer field present */
2868 6445 len = *p++;
2869
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 6445 if (len > p_end - p)
2870 ✗ return 0;
2871
1/4
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✗ Branch 3 not taken.
 6445 if (len && cc_ok) {
2872 /* write remaining section bytes */
2873 ✗ write_section_data(ts, tss,
2874 p, len, 0);
2875 /* check whether filter has been closed */
2876 ✗ if (!ts->pids[pid])
2877 ✗ return 0;
2878 }
2879 6445 p += len;
2880
1/2
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✗ Branch 1 not taken.
 6445 if (p < p_end) {
2881 6445 write_section_data(ts, tss,
2882 6445 p, p_end - p, 1);
2883 }
2884 } else {
2885
1/2
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✗ Branch 1 not taken.
 35 if (cc_ok) {
2886 35 write_section_data(ts, tss,
2887 35 p, p_end - p, 0);
2888 }
2889 }
2890
2891 // stop find_stream_info from waiting for more streams
2892 // when all programs have received a PMT
2893
4/4
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✓ Branch 1 taken 2043 times.
✓ Branch 2 taken 17 times.
✓ Branch 3 taken 4420 times.
 6480 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2894 int i;
2895
2/2
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✓ Branch 1 taken 17 times.
 34 for (i = 0; i < ts->nb_prg; i++) {
2896
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 17 if (!ts->prg[i].pmt_found)
2897 ✗ break;
2898 }
2899
2/4
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✓ Branch 2 taken 17 times.
✗ Branch 3 not taken.
 17 if (i == ts->nb_prg && ts->nb_prg > 0) {
2900 17 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2901 17 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2902 }
2903 }
2904
2905 } else {
2906 int ret;
2907 // Note: The position here points actually behind the current packet.
2908
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✗ Branch 1 not taken.
 373954 if (tss->type == MPEGTS_PES) {
2909
1/2
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 373954 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2910 373954 pos - ts->raw_packet_size)) < 0)
2911 ✗ return ret;
2912 }
2913 }
2914
2915 380434 return 0;
2916 }
2917
2918 59 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2919 {
2920 59 MpegTSContext *ts = s->priv_data;
2921 59 AVIOContext *pb = s->pb;
2922 int c, i;
2923 59 uint64_t pos = avio_tell(pb);
2924 59 int64_t back = FFMIN(seekback, pos);
2925
2926 //Special case for files like 01c56b0dc1.ts
2927
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 59 if (current_packet[0] == 0x80 && current_packet[12] == SYNC_BYTE && pos >= TS_PACKET_SIZE) {
2928 ✗ avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2929 ✗ return 0;
2930 }
2931
2932 59 avio_seek(pb, -back, SEEK_CUR);
2933
2934
1/2
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✗ Branch 1 not taken.
 4257 for (i = 0; i < ts->resync_size; i++) {
2935 4257 c = avio_r8(pb);
2936
1/2
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 4257 if (avio_feof(pb))
2937 ✗ return AVERROR_EOF;
2938
2/2
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✓ Branch 1 taken 4198 times.
 4257 if (c == SYNC_BYTE) {
2939 int new_packet_size, ret;
2940 59 avio_seek(pb, -1, SEEK_CUR);
2941 59 pos = avio_tell(pb);
2942 59 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2943
1/2
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✓ Branch 1 taken 59 times.
 59 if (ret < 0)
2944 ✗ return ret;
2945 59 new_packet_size = get_packet_size(s);
2946
2/4
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✗ Branch 1 not taken.
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 59 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2947 ✗ av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2948 ✗ ts->raw_packet_size = new_packet_size;
2949 }
2950 59 avio_seek(pb, pos, SEEK_SET);
2951 59 return 0;
2952 }
2953 }
2954 ✗ av_log(s, AV_LOG_ERROR,
2955 "max resync size reached, could not find sync byte\n");
2956 /* no sync found */
2957 ✗ return AVERROR_INVALIDDATA;
2958 }
2959
2960 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2961 398279 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2962 const uint8_t **data)
2963 {
2964 398279 AVIOContext *pb = s->pb;
2965 int len;
2966
2967 // 192 bytes source packet that start with a 4 bytes TP_extra_header
2968 // followed by 188 bytes of TS packet. The sync byte is at offset 4, so skip
2969 // the first 4 bytes otherwise we'll end up syncing to the wrong packet.
2970
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✓ Branch 1 taken 398279 times.
 398279 if (raw_packet_size == TS_DVHS_PACKET_SIZE)
2971 ✗ avio_skip(pb, 4);
2972
2973 for (;;) {
2974 398338 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2975
2/2
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✓ Branch 1 taken 397971 times.
 398338 if (len != TS_PACKET_SIZE)
2976
2/2
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✓ Branch 1 taken 55 times.
 367 return len < 0 ? len : AVERROR_EOF;
2977 /* check packet sync byte */
2978
2/2
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✓ Branch 1 taken 397912 times.
 397971 if ((*data)[0] != SYNC_BYTE) {
2979 /* find a new packet start */
2980
2981
1/2
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✓ Branch 2 taken 59 times.
 59 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2982 ✗ return AVERROR(EAGAIN);
2983 else
2984 59 continue;
2985 } else {
2986 397912 break;
2987 }
2988 }
2989 397912 return 0;
2990 }
2991
2992 397912 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2993 {
2994 397912 AVIOContext *pb = s->pb;
2995 int skip;
2996
1/2
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 397912 if (raw_packet_size == TS_DVHS_PACKET_SIZE)
2997 ✗ skip = raw_packet_size - TS_DVHS_PACKET_SIZE;
2998 else
2999 397912 skip = raw_packet_size - TS_PACKET_SIZE;
3000
1/2
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✓ Branch 1 taken 397912 times.
 397912 if (skip > 0)
3001 ✗ avio_skip(pb, skip);
3002 397912 }
3003
3004 29141 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
3005 {
3006 29141 AVFormatContext *s = ts->stream;
3007 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
3008 const uint8_t *data;
3009 int64_t packet_num;
3010 29141 int ret = 0;
3011
3012
2/2
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✓ Branch 2 taken 28881 times.
 29141 if (avio_tell(s->pb) != ts->last_pos) {
3013 int i;
3014 260 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
3015 /* seek detected, flush pes buffer */
3016
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 2130180 for (i = 0; i < NB_PID_MAX; i++) {
3017
2/2
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✓ Branch 1 taken 2128297 times.
 2129920 if (ts->pids[i]) {
3018
2/2
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✓ Branch 1 taken 1064 times.
 1623 if (ts->pids[i]->type == MPEGTS_PES) {
3019 559 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3020 559 av_buffer_unref(&pes->buffer);
3021 559 pes->data_index = 0;
3022 559 pes->state = MPEGTS_SKIP; /* skip until pes header */
3023
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✗ Branch 1 not taken.
 1064 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
3024 1064 ts->pids[i]->u.section_filter.last_ver = -1;
3025 }
3026 1623 ts->pids[i]->last_cc = -1;
3027 1623 ts->pids[i]->last_pcr = -1;
3028 }
3029 }
3030 }
3031
3032 29141 ts->stop_parse = 0;
3033 29141 packet_num = 0;
3034 29141 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3035 for (;;) {
3036 427053 packet_num++;
3037
3/4
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✓ Branch 2 taken 8066 times.
✗ Branch 3 not taken.
 427053 if (nb_packets != 0 && packet_num >= nb_packets ||
3038
2/2
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✓ Branch 1 taken 426998 times.
 427053 ts->stop_parse > 1) {
3039 55 ret = AVERROR(EAGAIN);
3040 55 break;
3041 }
3042
2/2
✓ Branch 0 taken 28719 times.
✓ Branch 1 taken 398279 times.
 426998 if (ts->stop_parse > 0)
3043 28719 break;
3044
3045 398279 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3046
2/2
✓ Branch 0 taken 367 times.
✓ Branch 1 taken 397912 times.
 398279 if (ret != 0)
3047 367 break;
3048 397912 ret = handle_packet(ts, data, avio_tell(s->pb));
3049 397912 finished_reading_packet(s, ts->raw_packet_size);
3050
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 397912 times.
 397912 if (ret != 0)
3051 ✗ break;
3052 }
3053 29141 ts->last_pos = avio_tell(s->pb);
3054 29141 return ret;
3055 }
3056
3057 7235 static int mpegts_probe(const AVProbeData *p)
3058 {
3059 7235 const int size = p->buf_size;
3060 7235 int maxscore = 0;
3061 7235 int sumscore = 0;
3062 int i;
3063 7235 int check_count = size / TS_FEC_PACKET_SIZE;
3064 #define CHECK_COUNT 10
3065 #define CHECK_BLOCK 100
3066
3067
2/2
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 7235 if (!check_count)
3068 13 return 0;
3069
3070
2/2
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✓ Branch 1 taken 7222 times.
 31497 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3071 24275 int left = FFMIN(check_count - i, CHECK_BLOCK);
3072 24275 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3073 24275 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
3074 24275 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
3075 24275 score = FFMAX3(score, dvhs_score, fec_score);
3076 24275 sumscore += score;
3077 24275 maxscore = FFMAX(maxscore, score);
3078 }
3079
3080 7222 sumscore = sumscore * CHECK_COUNT / check_count;
3081 7222 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3082
3083 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3084
3085
3/4
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 7222 if (check_count > CHECK_COUNT && sumscore > 6) {
3086 ✗ return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3087
4/4
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✓ Branch 1 taken 355 times.
✓ Branch 2 taken 47 times.
✓ Branch 3 taken 6820 times.
 7222 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3088 47 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3089
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 7175 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3090 ✗ return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3091
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 7175 } else if (sumscore > 6) {
3092 5 return 2;
3093 } else {
3094 7170 return 0;
3095 }
3096 }
3097
3098 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3099 * (-1) if not available */
3100 59346 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3101 {
3102 int afc, len, flags;
3103 const uint8_t *p;
3104 unsigned int v;
3105
3106 59346 afc = (packet[3] >> 4) & 3;
3107
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 59346 if (afc <= 1)
3108 ✗ return AVERROR_INVALIDDATA;
3109 59346 p = packet + 4;
3110 59346 len = p[0];
3111 59346 p++;
3112
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 59346 if (len == 0)
3113 38 return AVERROR_INVALIDDATA;
3114 59308 flags = *p++;
3115 59308 len--;
3116
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 59308 if (!(flags & 0x10))
3117 31830 return AVERROR_INVALIDDATA;
3118
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 27478 if (len < 6)
3119 ✗ return AVERROR_INVALIDDATA;
3120 27478 v = AV_RB32(p);
3121 27478 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3122 27478 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3123 27478 return 0;
3124 }
3125
3126 110 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3127
3128 /* NOTE: We attempt to seek on non-seekable files as well, as the
3129 * probe buffer usually is big enough. Only warn if the seek failed
3130 * on files where the seek should work. */
3131
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 110 if (avio_seek(pb, pos, SEEK_SET) < 0)
3132 ✗ av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3133 110 }
3134
3135 55 static int mpegts_read_header(AVFormatContext *s)
3136 {
3137 55 MpegTSContext *ts = s->priv_data;
3138 55 AVIOContext *pb = s->pb;
3139 55 int64_t pos, probesize = s->probesize;
3140 55 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3141
3142
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 55 if (ffio_ensure_seekback(pb, seekback) < 0)
3143 ✗ av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3144
3145 55 pos = avio_tell(pb);
3146 55 ts->raw_packet_size = get_packet_size(s);
3147
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 55 if (ts->raw_packet_size <= 0) {
3148 ✗ av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3149 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3150 }
3151 55 ts->stream = s;
3152 55 ts->auto_guess = 0;
3153
3154
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 55 if (s->iformat == &ff_mpegts_demuxer.p) {
3155 /* normal demux */
3156
3157 /* first do a scan to get all the services */
3158 55 seek_back(s, pb, pos);
3159
3160 55 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3161 55 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3162 55 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3163
3164 55 handle_packets(ts, probesize / ts->raw_packet_size);
3165 /* if could not find service, enable auto_guess */
3166
3167 55 ts->auto_guess = 1;
3168
3169 55 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3170
3171 55 s->ctx_flags |= AVFMTCTX_NOHEADER;
3172 } else {
3173 AVStream *st;
3174 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3175 int64_t pcrs[2], pcr_h;
3176 uint8_t packet[TS_PACKET_SIZE];
3177 const uint8_t *data;
3178
3179 /* only read packets */
3180
3181 ✗ st = avformat_new_stream(s, NULL);
3182 ✗ if (!st)
3183 ✗ return AVERROR(ENOMEM);
3184 ✗ avpriv_set_pts_info(st, 60, 1, 27000000);
3185 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3186 ✗ st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3187
3188 /* we iterate until we find two PCRs to estimate the bitrate */
3189 ✗ pcr_pid = -1;
3190 ✗ nb_pcrs = 0;
3191 ✗ nb_packets = 0;
3192 for (;;) {
3193 ✗ ret = read_packet(s, packet, ts->raw_packet_size, &data);
3194 ✗ if (ret < 0)
3195 ✗ return ret;
3196 ✗ pid = AV_RB16(data + 1) & 0x1fff;
3197 ✗ if ((pcr_pid == -1 || pcr_pid == pid) &&
3198 ✗ parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3199 ✗ finished_reading_packet(s, ts->raw_packet_size);
3200 ✗ pcr_pid = pid;
3201 ✗ pcrs[nb_pcrs] = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
3202 ✗ nb_pcrs++;
3203 ✗ if (nb_pcrs >= 2) {
3204 ✗ if (pcrs[1] - pcrs[0] > 0) {
3205 /* the difference needs to be positive to make sense for bitrate computation */
3206 ✗ break;
3207 } else {
3208 ✗ av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3209 ✗ pcrs[0] = pcrs[1];
3210 ✗ nb_pcrs--;
3211 }
3212 }
3213 } else {
3214 ✗ finished_reading_packet(s, ts->raw_packet_size);
3215 }
3216 ✗ nb_packets++;
3217 }
3218
3219 /* NOTE1: the bitrate is computed without the FEC */
3220 /* NOTE2: it is only the bitrate of the start of the stream */
3221 ✗ ts->pcr_incr = pcrs[1] - pcrs[0];
3222 ✗ ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3223 ✗ s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3224 ✗ st->codecpar->bit_rate = s->bit_rate;
3225 ✗ st->start_time = ts->cur_pcr;
3226 ✗ av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3227 ✗ st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3228 }
3229
3230 55 seek_back(s, pb, pos);
3231 55 return 0;
3232 }
3233
3234 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3235
3236 ✗ static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3237 {
3238 ✗ MpegTSContext *ts = s->priv_data;
3239 int ret, i;
3240 int64_t pcr_h, next_pcr_h, pos;
3241 int pcr_l, next_pcr_l;
3242 uint8_t pcr_buf[12];
3243 const uint8_t *data;
3244
3245 ✗ if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3246 ✗ return ret;
3247 ✗ ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3248 ✗ pkt->pos = avio_tell(s->pb);
3249 ✗ if (ret < 0) {
3250 ✗ return ret;
3251 }
3252 ✗ if (data != pkt->data)
3253 ✗ memcpy(pkt->data, data, TS_PACKET_SIZE);
3254 ✗ finished_reading_packet(s, ts->raw_packet_size);
3255 ✗ if (ts->mpeg2ts_compute_pcr) {
3256 /* compute exact PCR for each packet */
3257 ✗ if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3258 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3259 ✗ pos = avio_tell(s->pb);
3260 ✗ for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3261 ✗ avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3262 ✗ avio_read(s->pb, pcr_buf, 12);
3263 ✗ if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3264 /* XXX: not precise enough */
3265 ✗ ts->pcr_incr =
3266 ✗ ((next_pcr_h - pcr_h) * SYSTEM_CLOCK_FREQUENCY_DIVISOR + (next_pcr_l - pcr_l)) /
3267 ✗ (i + 1);
3268 ✗ break;
3269 }
3270 }
3271 ✗ avio_seek(s->pb, pos, SEEK_SET);
3272 /* no next PCR found: we use previous increment */
3273 ✗ ts->cur_pcr = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
3274 }
3275 ✗ pkt->pts = ts->cur_pcr;
3276 ✗ pkt->duration = ts->pcr_incr;
3277 ✗ ts->cur_pcr += ts->pcr_incr;
3278 }
3279 ✗ pkt->stream_index = 0;
3280 ✗ return 0;
3281 }
3282
3283 29086 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3284 {
3285 29086 MpegTSContext *ts = s->priv_data;
3286 int ret, i;
3287
3288 29086 pkt->size = -1;
3289 29086 ts->pkt = pkt;
3290 29086 ret = handle_packets(ts, 0);
3291
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 29086 if (ret < 0) {
3292 367 av_packet_unref(ts->pkt);
3293 /* flush pes data left */
3294
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 2173798 for (i = 0; i < NB_PID_MAX; i++)
3295
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 2173593 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3296 852 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3297
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✗ Branch 3 not taken.
 852 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3298 162 ret = new_pes_packet(pes, pkt);
3299
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 162 if (ret < 0)
3300 ✗ return ret;
3301 162 pes->state = MPEGTS_SKIP;
3302 162 ret = 0;
3303 162 break;
3304 }
3305 }
3306 }
3307
3308
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 29086 if (!ret && pkt->size < 0)
3309 ✗ ret = AVERROR_INVALIDDATA;
3310 29086 return ret;
3311 }
3312
3313 55 static void mpegts_free(MpegTSContext *ts)
3314 {
3315 int i;
3316
3317 55 clear_programs(ts);
3318
3319
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 1815 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3320 1760 av_buffer_pool_uninit(&ts->pools[i]);
3321
3322
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 450615 for (i = 0; i < NB_PID_MAX; i++)
3323
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 450560 if (ts->pids[i])
3324 353 mpegts_close_filter(ts, ts->pids[i]);
3325 55 }
3326
3327 55 static int mpegts_read_close(AVFormatContext *s)
3328 {
3329 55 MpegTSContext *ts = s->priv_data;
3330 55 mpegts_free(ts);
3331 55 return 0;
3332 }
3333
3334 ✗ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3335 int64_t *ppos, int64_t pos_limit)
3336 {
3337 ✗ MpegTSContext *ts = s->priv_data;
3338 int64_t pos, timestamp;
3339 uint8_t buf[TS_PACKET_SIZE];
3340 ✗ int pcr_l, pcr_pid =
3341 ✗ ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3342 ✗ int pos47 = ts->pos47_full % ts->raw_packet_size;
3343 ✗ pos =
3344 ✗ ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3345 ✗ ts->raw_packet_size + pos47;
3346 ✗ while(pos < pos_limit) {
3347 ✗ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3348 ✗ return AV_NOPTS_VALUE;
3349 ✗ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3350 ✗ return AV_NOPTS_VALUE;
3351 ✗ if (buf[0] != SYNC_BYTE) {
3352 ✗ if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3353 ✗ return AV_NOPTS_VALUE;
3354 ✗ pos = avio_tell(s->pb);
3355 ✗ continue;
3356 }
3357 ✗ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3358 ✗ parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3359 ✗ *ppos = pos;
3360 ✗ return timestamp;
3361 }
3362 ✗ pos += ts->raw_packet_size;
3363 }
3364
3365 ✗ return AV_NOPTS_VALUE;
3366 }
3367
3368 90 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3369 int64_t *ppos, int64_t pos_limit)
3370 {
3371 90 MpegTSContext *ts = s->priv_data;
3372 AVPacket *pkt;
3373 int64_t pos;
3374 90 int pos47 = ts->pos47_full % ts->raw_packet_size;
3375 90 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3376 90 ff_read_frame_flush(s);
3377
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 90 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3378 ✗ return AV_NOPTS_VALUE;
3379 90 pkt = av_packet_alloc();
3380
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 90 if (!pkt)
3381 ✗ return AV_NOPTS_VALUE;
3382
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 496 while(pos < pos_limit) {
3383 484 int ret = av_read_frame(s, pkt);
3384
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 484 if (ret < 0) {
3385 18 av_packet_free(&pkt);
3386 18 return AV_NOPTS_VALUE;
3387 }
3388
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 466 if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3389 163 ff_reduce_index(s, pkt->stream_index);
3390 163 av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3391
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 163 if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3392 60 int64_t dts = pkt->dts;
3393 60 *ppos = pkt->pos;
3394 60 av_packet_free(&pkt);
3395 60 return dts;
3396 }
3397 }
3398 406 pos = pkt->pos;
3399 406 av_packet_unref(pkt);
3400 }
3401
3402 12 av_packet_free(&pkt);
3403 12 return AV_NOPTS_VALUE;
3404 }
3405
3406 /**************************************************************/
3407 /* parsing functions - called from other demuxers such as RTP */
3408
3409 ✗ MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3410 {
3411 MpegTSContext *ts;
3412
3413 ✗ ts = av_mallocz(sizeof(MpegTSContext));
3414 ✗ if (!ts)
3415 ✗ return NULL;
3416 /* no stream case, currently used by RTP */
3417 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3418 ✗ ts->max_packet_size = 2048000;
3419 ✗ ts->stream = s;
3420 ✗ ts->auto_guess = 1;
3421
3422 ✗ mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3423 ✗ mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3424 ✗ mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3425
3426 ✗ return ts;
3427 }
3428
3429 /* return the consumed length if a packet was output, or -1 if no
3430 * packet is output */
3431 ✗ int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3432 const uint8_t *buf, int len)
3433 {
3434 int len1;
3435
3436 ✗ len1 = len;
3437 ✗ ts->pkt = pkt;
3438 for (;;) {
3439 ✗ ts->stop_parse = 0;
3440 ✗ if (len < TS_PACKET_SIZE)
3441 ✗ return AVERROR_INVALIDDATA;
3442 ✗ if (buf[0] != SYNC_BYTE) {
3443 ✗ buf++;
3444 ✗ len--;
3445 } else {
3446 ✗ handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3447 ✗ buf += TS_PACKET_SIZE;
3448 ✗ len -= TS_PACKET_SIZE;
3449 ✗ if (ts->stop_parse == 1)
3450 ✗ break;
3451 }
3452 }
3453 ✗ return len1 - len;
3454 }
3455
3456 ✗ void avpriv_mpegts_parse_close(MpegTSContext *ts)
3457 {
3458 ✗ mpegts_free(ts);
3459 ✗ av_free(ts);
3460 ✗ }
3461
3462 const FFInputFormat ff_mpegts_demuxer = {
3463 .p.name = "mpegts",
3464 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3465 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3466 .p.priv_class = &mpegts_class,
3467 .priv_data_size = sizeof(MpegTSContext),
3468 .read_probe = mpegts_probe,
3469 .read_header = mpegts_read_header,
3470 .read_packet = mpegts_read_packet,
3471 .read_close = mpegts_read_close,
3472 .read_timestamp = mpegts_get_dts,
3473 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3474 };
3475
3476 const FFInputFormat ff_mpegtsraw_demuxer = {
3477 .p.name = "mpegtsraw",
3478 .p.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3479 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3480 .p.priv_class = &mpegtsraw_class,
3481 .priv_data_size = sizeof(MpegTSContext),
3482 .read_header = mpegts_read_header,
3483 .read_packet = mpegts_raw_read_packet,
3484 .read_close = mpegts_read_close,
3485 .read_timestamp = mpegts_get_dts,
3486 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3487 };
3488