FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2024-12-12 01:08:13
Exec Total Coverage
Lines: 1112 1941 57.3%
Functions: 49 70 70.0%
Branches: 608 1303 46.7%
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/buffer.h"
25 #include "libavutil/crc.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/log.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/mem.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/avassert.h"
33 #include "libavutil/dovi_meta.h"
34 #include "libavcodec/bytestream.h"
35 #include "libavcodec/defs.h"
36 #include "libavcodec/get_bits.h"
37 #include "libavcodec/opus/opus.h"
38 #include "avformat.h"
39 #include "mpegts.h"
40 #include "internal.h"
41 #include "avio_internal.h"
42 #include "demux.h"
43 #include "mpeg.h"
44 #include "isom.h"
45 #if CONFIG_ICONV
46 #include <iconv.h>
47 #endif
48
49 /* maximum size in which we look for synchronization if
50 * synchronization is lost */
51 #define MAX_RESYNC_SIZE 65536
52
53 #define MAX_MP4_DESCR_COUNT 16
54
55 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
56 do { \
57 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
58 (modulus) = (dividend) % (divisor); \
59 (prev_dividend) = (dividend); \
60 } while (0)
61
62 #define PROBE_PACKET_MAX_BUF 8192
63 #define PROBE_PACKET_MARGIN 5
64
65 enum MpegTSFilterType {
66 MPEGTS_PES,
67 MPEGTS_SECTION,
68 MPEGTS_PCR,
69 };
70
71 typedef struct MpegTSFilter MpegTSFilter;
72
73 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
74 int is_start, int64_t pos);
75
76 typedef struct MpegTSPESFilter {
77 PESCallback *pes_cb;
78 void *opaque;
79 } MpegTSPESFilter;
80
81 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
82
83 typedef void SetServiceCallback (void *opaque, int ret);
84
85 typedef struct MpegTSSectionFilter {
86 int section_index;
87 int section_h_size;
88 int last_ver;
89 unsigned crc;
90 unsigned last_crc;
91 uint8_t *section_buf;
92 unsigned int check_crc : 1;
93 unsigned int end_of_section_reached : 1;
94 SectionCallback *section_cb;
95 void *opaque;
96 } MpegTSSectionFilter;
97
98 struct MpegTSFilter {
99 int pid;
100 int es_id;
101 int last_cc; /* last cc code (-1 if first packet) */
102 int64_t last_pcr;
103 int discard;
104 enum MpegTSFilterType type;
105 union {
106 MpegTSPESFilter pes_filter;
107 MpegTSSectionFilter section_filter;
108 } u;
109 };
110
111 struct Stream {
112 int idx;
113 int stream_identifier;
114 };
115
116 #define MAX_STREAMS_PER_PROGRAM 128
117 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
118 struct Program {
119 unsigned int id; // program id/service id
120 unsigned int nb_pids;
121 unsigned int pids[MAX_PIDS_PER_PROGRAM];
122 unsigned int nb_streams;
123 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
124
125 /** have we found pmt for this program */
126 int pmt_found;
127 };
128
129 struct MpegTSContext {
130 const AVClass *class;
131 /* user data */
132 AVFormatContext *stream;
133 /** raw packet size, including FEC if present */
134 int raw_packet_size;
135
136 int64_t pos47_full;
137
138 /** if true, all pids are analyzed to find streams */
139 int auto_guess;
140
141 /** compute exact PCR for each transport stream packet */
142 int mpeg2ts_compute_pcr;
143
144 /** fix dvb teletext pts */
145 int fix_teletext_pts;
146
147 int64_t cur_pcr; /**< used to estimate the exact PCR */
148 int64_t pcr_incr; /**< used to estimate the exact PCR */
149
150 /* data needed to handle file based ts */
151 /** stop parsing loop */
152 int stop_parse;
153 /** packet containing Audio/Video data */
154 AVPacket *pkt;
155 /** to detect seek */
156 int64_t last_pos;
157
158 int skip_changes;
159 int skip_clear;
160 int skip_unknown_pmt;
161
162 int scan_all_pmts;
163
164 int resync_size;
165 int merge_pmt_versions;
166 int max_packet_size;
167
168 int id;
169
170 /******************************************/
171 /* private mpegts data */
172 /* scan context */
173 /** structure to keep track of Program->pids mapping */
174 unsigned int nb_prg;
175 struct Program *prg;
176
177 int8_t crc_validity[NB_PID_MAX];
178 /** filters for various streams specified by PMT + for the PAT and PMT */
179 MpegTSFilter *pids[NB_PID_MAX];
180 int current_pid;
181
182 AVStream *epg_stream;
183 AVBufferPool* pools[32];
184 };
185
186 #define MPEGTS_OPTIONS \
187 { "resync_size", "set size limit for looking up a new synchronization", \
188 offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, \
189 { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, \
190 { "ts_id", "transport stream id", \
191 offsetof(MpegTSContext, id), AV_OPT_TYPE_INT, \
192 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, \
193 { "ts_packetsize", "output option carrying the raw packet size", \
194 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, \
195 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }
196
197 static const AVOption options[] = {
198 MPEGTS_OPTIONS,
199 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
200 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
201 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
202 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
203 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
204 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
205 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
206 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
207 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
208 {.i64 = 0}, 0, 1, 0 },
209 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
210 {.i64 = 0}, 0, 1, 0 },
211 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
212 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
213 { NULL },
214 };
215
216 static const AVClass mpegts_class = {
217 .class_name = "mpegts demuxer",
218 .item_name = av_default_item_name,
219 .option = options,
220 .version = LIBAVUTIL_VERSION_INT,
221 };
222
223 static const AVOption raw_options[] = {
224 MPEGTS_OPTIONS,
225 { "compute_pcr", "compute exact PCR for each transport stream packet",
226 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
227 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
228 { NULL },
229 };
230
231 static const AVClass mpegtsraw_class = {
232 .class_name = "mpegtsraw demuxer",
233 .item_name = av_default_item_name,
234 .option = raw_options,
235 .version = LIBAVUTIL_VERSION_INT,
236 };
237
238 /* TS stream handling */
239
240 enum MpegTSState {
241 MPEGTS_HEADER = 0,
242 MPEGTS_PESHEADER,
243 MPEGTS_PESHEADER_FILL,
244 MPEGTS_PAYLOAD,
245 MPEGTS_SKIP,
246 };
247
248 /* enough for PES header + length */
249 #define PES_START_SIZE 6
250 #define PES_HEADER_SIZE 9
251 #define MAX_PES_HEADER_SIZE (9 + 255)
252
253 typedef struct PESContext {
254 int pid;
255 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
256 int stream_type;
257 MpegTSContext *ts;
258 AVFormatContext *stream;
259 AVStream *st;
260 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
261 enum MpegTSState state;
262 /* used to get the format */
263 int data_index;
264 int flags; /**< copied to the AVPacket flags */
265 int PES_packet_length;
266 int pes_header_size;
267 int extended_stream_id;
268 uint8_t stream_id;
269 int64_t pts, dts;
270 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
271 uint8_t header[MAX_PES_HEADER_SIZE];
272 AVBufferRef *buffer;
273 SLConfigDescr sl;
274 int merged_st;
275 } PESContext;
276
277 extern const FFInputFormat ff_mpegts_demuxer;
278
279 484 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
280 {
281 int i;
282
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 484 for (i = 0; i < ts->nb_prg; i++) {
283
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 429 if (ts->prg[i].id == programid) {
284 429 return &ts->prg[i];
285 }
286 }
287 55 return NULL;
288 }
289
290 172 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
291 {
292 172 AVProgram *prg = NULL;
293 int i;
294
295
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 172 for (i = 0; i < ts->stream->nb_programs; i++)
296
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 172 if (ts->stream->programs[i]->id == programid) {
297 172 prg = ts->stream->programs[i];
298 172 break;
299 }
300
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 172 if (!prg)
301 ✗ return;
302 172 prg->nb_stream_indexes = 0;
303 }
304
305 326 static void clear_program(struct Program *p)
306 {
307
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 326 if (!p)
308 ✗ return;
309 326 p->nb_pids = 0;
310 326 p->nb_streams = 0;
311 326 p->pmt_found = 0;
312 }
313
314 55 static void clear_programs(MpegTSContext *ts)
315 {
316 55 av_freep(&ts->prg);
317 55 ts->nb_prg = 0;
318 55 }
319
320 213 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
321 {
322 213 struct Program *p = get_program(ts, programid);
323
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 213 if (p)
324 158 return p;
325
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 55 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
326 ✗ ts->nb_prg = 0;
327 ✗ return NULL;
328 }
329 55 p = &ts->prg[ts->nb_prg];
330 55 p->id = programid;
331 55 clear_program(p);
332 55 ts->nb_prg++;
333 55 return p;
334 }
335
336 1314 static void add_pid_to_program(struct Program *p, unsigned int pid)
337 {
338 int i;
339
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 1314 if (!p)
340 ✗ return;
341
342
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 1314 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
343 ✗ return;
344
345
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 2638 for (i = 0; i < p->nb_pids; i++)
346
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 1759 if (p->pids[i] == pid)
347 435 return;
348
349 879 p->pids[p->nb_pids++] = pid;
350 }
351
352 271 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
353 unsigned int pid, int version)
354 {
355 int i;
356
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 271 for (i = 0; i < s->nb_programs; i++) {
357 271 AVProgram *program = s->programs[i];
358
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 271 if (program->id == programid) {
359 271 int old_pcr_pid = program->pcr_pid,
360 271 old_version = program->pmt_version;
361 271 program->pcr_pid = pid;
362 271 program->pmt_version = version;
363
364
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 271 if (old_version != -1 && old_version != version) {
365 18 av_log(s, AV_LOG_VERBOSE,
366 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
367 programid, old_version, version, old_pcr_pid, pid);
368 }
369 271 break;
370 }
371 }
372 271 }
373
374 /**
375 * @brief discard_pid() decides if the pid is to be discarded according
376 * to caller's programs selection
377 * @param ts : - TS context
378 * @param pid : - pid
379 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
380 * 0 otherwise
381 */
382 36016 static int discard_pid(MpegTSContext *ts, unsigned int pid)
383 {
384 int i, j, k;
385 36016 int used = 0, discarded = 0;
386 struct Program *p;
387
388
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 36016 if (pid == PAT_PID)
389 3005 return 0;
390
391 /* If none of the programs have .discard=AVDISCARD_ALL then there's
392 * no way we have to discard this packet */
393
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 65995 for (k = 0; k < ts->stream->nb_programs; k++)
394
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 32984 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
395 ✗ break;
396
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 33011 if (k == ts->stream->nb_programs)
397 33011 return 0;
398
399 ✗ for (i = 0; i < ts->nb_prg; i++) {
400 ✗ p = &ts->prg[i];
401 ✗ for (j = 0; j < p->nb_pids; j++) {
402 ✗ if (p->pids[j] != pid)
403 ✗ continue;
404 // is program with id p->id set to be discarded?
405 ✗ for (k = 0; k < ts->stream->nb_programs; k++) {
406 ✗ if (ts->stream->programs[k]->id == p->id) {
407 ✗ if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
408 ✗ discarded++;
409 else
410 ✗ used++;
411 }
412 }
413 }
414 }
415
416 ✗ return !used && discarded;
417 }
418
419 /**
420 * Assemble PES packets out of TS packets, and then call the "section_cb"
421 * function when they are complete.
422 */
423 6474 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
424 const uint8_t *buf, int buf_size, int is_start)
425 {
426 6474 MpegTSSectionFilter *tss = &tss1->u.section_filter;
427 6474 uint8_t *cur_section_buf = NULL;
428 int len, offset;
429
430
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 6474 if (is_start) {
431 6439 memcpy(tss->section_buf, buf, buf_size);
432 6439 tss->section_index = buf_size;
433 6439 tss->section_h_size = -1;
434 6439 tss->end_of_section_reached = 0;
435 } else {
436
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 35 if (tss->end_of_section_reached)
437 ✗ return;
438 35 len = MAX_SECTION_SIZE - tss->section_index;
439
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 35 if (buf_size < len)
440 35 len = buf_size;
441 35 memcpy(tss->section_buf + tss->section_index, buf, len);
442 35 tss->section_index += len;
443 }
444
445 6474 offset = 0;
446 6474 cur_section_buf = tss->section_buf;
447
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 12913 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != STUFFING_BYTE) {
448 /* compute section length if possible */
449
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 6682 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
450 6474 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
451
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 6474 if (len > MAX_SECTION_SIZE)
452 ✗ return;
453 6474 tss->section_h_size = len;
454 }
455
456
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 6682 if (tss->section_h_size != -1 &&
457
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 6474 tss->section_index >= offset + tss->section_h_size) {
458 6439 int crc_valid = 1;
459 6439 tss->end_of_section_reached = 1;
460
461
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 6439 if (tss->check_crc) {
462 6439 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
463
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 6439 if (tss->section_h_size >= 4)
464 6439 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
465
466
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 6439 if (crc_valid) {
467 6439 ts->crc_validity[ tss1->pid ] = 100;
468 ✗ }else if (ts->crc_validity[ tss1->pid ] > -10) {
469 ✗ ts->crc_validity[ tss1->pid ]--;
470 }else
471 ✗ crc_valid = 2;
472 }
473
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 6439 if (crc_valid) {
474 6439 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
475
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 6439 if (crc_valid != 1)
476 ✗ tss->last_ver = -1;
477 }
478
479 6439 cur_section_buf += tss->section_h_size;
480 6439 offset += tss->section_h_size;
481 6439 tss->section_h_size = -1;
482 } else {
483 243 tss->section_h_size = -1;
484 243 tss->end_of_section_reached = 0;
485 243 break;
486 }
487 }
488 }
489
490 353 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
491 enum MpegTSFilterType type)
492 {
493 MpegTSFilter *filter;
494
495 353 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
496
497
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 353 if (pid >= NB_PID_MAX || ts->pids[pid])
498 ✗ return NULL;
499 353 filter = av_mallocz(sizeof(MpegTSFilter));
500
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 353 if (!filter)
501 ✗ return NULL;
502 353 ts->pids[pid] = filter;
503
504 353 filter->type = type;
505 353 filter->pid = pid;
506 353 filter->es_id = -1;
507 353 filter->last_cc = -1;
508 353 filter->last_pcr= -1;
509
510 353 return filter;
511 }
512
513 227 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
514 unsigned int pid,
515 SectionCallback *section_cb,
516 void *opaque,
517 int check_crc)
518 {
519 MpegTSFilter *filter;
520 MpegTSSectionFilter *sec;
521 227 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
522
523
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 227 if (!section_buf)
524 ✗ return NULL;
525
526
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 227 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
527 ✗ av_free(section_buf);
528 ✗ return NULL;
529 }
530 227 sec = &filter->u.section_filter;
531 227 sec->section_cb = section_cb;
532 227 sec->opaque = opaque;
533 227 sec->section_buf = section_buf;
534 227 sec->check_crc = check_crc;
535 227 sec->last_ver = -1;
536
537 227 return filter;
538 }
539
540 126 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
541 PESCallback *pes_cb,
542 void *opaque)
543 {
544 MpegTSFilter *filter;
545 MpegTSPESFilter *pes;
546
547
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 126 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
548 ✗ return NULL;
549
550 126 pes = &filter->u.pes_filter;
551 126 pes->pes_cb = pes_cb;
552 126 pes->opaque = opaque;
553 126 return filter;
554 }
555
556 ✗ static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
557 {
558 ✗ return mpegts_open_filter(ts, pid, MPEGTS_PCR);
559 }
560
561 353 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
562 {
563 int pid;
564
565 353 pid = filter->pid;
566
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 353 if (filter->type == MPEGTS_SECTION)
567 227 av_freep(&filter->u.section_filter.section_buf);
568
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 126 else if (filter->type == MPEGTS_PES) {
569 126 PESContext *pes = filter->u.pes_filter.opaque;
570 126 av_buffer_unref(&pes->buffer);
571 /* referenced private data will be freed later in
572 * avformat_close_input (pes->st->priv_data == pes) */
573
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 126 if (!pes->st || pes->merged_st) {
574 21 av_freep(&filter->u.pes_filter.opaque);
575 }
576 }
577
578 353 av_free(filter);
579 353 ts->pids[pid] = NULL;
580 353 }
581
582 70839 static int analyze(const uint8_t *buf, int size, int packet_size,
583 int probe)
584 {
585 int stat[TS_MAX_PACKET_SIZE];
586 70839 int stat_all = 0;
587 int i;
588 70839 int best_score = 0;
589
590 70839 memset(stat, 0, packet_size * sizeof(*stat));
591
592
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 1077641426 for (i = 0; i < size - 3; i++) {
593
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 1077570587 if (buf[i] == SYNC_BYTE) {
594 1906528 int pid = AV_RB16(buf+1) & 0x1FFF;
595 1906528 int asc = buf[i + 3] & 0x30;
596
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 1906528 if (!probe || pid == 0x1FFF || asc) {
597 1566230 int x = i % packet_size;
598 1566230 stat[x]++;
599 1566230 stat_all++;
600
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 1566230 if (stat[x] > best_score) {
601 118767 best_score = stat[x];
602 }
603 }
604 }
605 }
606
607 70839 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
608 }
609
610 /* autodetect fec presence */
611 114 static int get_packet_size(AVFormatContext* s)
612 {
613 int score, fec_score, dvhs_score;
614 int margin;
615 int ret;
616
617 /*init buffer to store stream for probing */
618 114 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
619 114 int buf_size = 0;
620 114 int max_iterations = 16;
621
622
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 114 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
623 114 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
624
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 114 if (ret < 0)
625 ✗ return AVERROR_INVALIDDATA;
626 114 buf_size += ret;
627
628 114 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
629 114 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
630 114 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
631 114 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
632 buf_size, score, dvhs_score, fec_score);
633
634 114 margin = mid_pred(score, fec_score, dvhs_score);
635
636
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 114 if (buf_size < PROBE_PACKET_MAX_BUF)
637 1 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
638
639
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 114 if (score > margin)
640 114 return TS_PACKET_SIZE;
641 ✗ else if (dvhs_score > margin)
642 ✗ return TS_DVHS_PACKET_SIZE;
643 ✗ else if (fec_score > margin)
644 ✗ return TS_FEC_PACKET_SIZE;
645 }
646 ✗ return AVERROR_INVALIDDATA;
647 }
648
649 typedef struct SectionHeader {
650 uint8_t tid;
651 uint16_t id;
652 uint8_t version;
653 uint8_t current_next;
654 uint8_t sec_num;
655 uint8_t last_sec_num;
656 } SectionHeader;
657
658 5759 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
659 {
660
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 5759 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
661 5175 return 1;
662
663 584 tssf->last_ver = h->version;
664 584 tssf->last_crc = tssf->crc;
665
666 584 return 0;
667 }
668
669 31526 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
670 {
671 const uint8_t *p;
672 int c;
673
674 31526 p = *pp;
675
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 31526 if (p >= p_end)
676 1461 return AVERROR_INVALIDDATA;
677 30065 c = *p++;
678 30065 *pp = p;
679 30065 return c;
680 }
681
682 9699 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
683 {
684 const uint8_t *p;
685 int c;
686
687 9699 p = *pp;
688
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 9699 if (1 >= p_end - p)
689 313 return AVERROR_INVALIDDATA;
690 9386 c = AV_RB16(p);
691 9386 p += 2;
692 9386 *pp = p;
693 9386 return c;
694 }
695
696 /* read and allocate a DVB string preceded by its length */
697 200 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
698 {
699 int len;
700 const uint8_t *p;
701 char *str;
702
703 200 p = *pp;
704 200 len = get8(&p, p_end);
705
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 200 if (len < 0)
706 ✗ return NULL;
707
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 200 if (len > p_end - p)
708 ✗ return NULL;
709 #if CONFIG_ICONV
710
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 200 if (len) {
711 200 const char *encodings[] = {
712 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
713 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
714 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
715 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
716 "", "", "", "", "", "", "", ""
717 };
718 iconv_t cd;
719 char *in, *out;
720 200 size_t inlen = len, outlen = inlen * 6 + 1;
721
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 200 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
722 char iso8859[12];
723 ✗ snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
724 ✗ inlen -= 3;
725 ✗ in = (char *)p + 3;
726 ✗ cd = iconv_open("UTF-8", iso8859);
727
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 200 } else if (p[0] < 0x20) {
728 8 inlen -= 1;
729 8 in = (char *)p + 1;
730 8 cd = iconv_open("UTF-8", encodings[*p]);
731 } else {
732 192 in = (char *)p;
733 192 cd = iconv_open("UTF-8", encodings[0]);
734 }
735
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 200 if (cd == (iconv_t)-1)
736 ✗ goto no_iconv;
737 200 str = out = av_malloc(outlen);
738
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 200 if (!str) {
739 ✗ iconv_close(cd);
740 200 return NULL;
741 }
742
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 200 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
743 ✗ iconv_close(cd);
744 ✗ av_freep(&str);
745 ✗ goto no_iconv;
746 }
747 200 iconv_close(cd);
748 200 *out = 0;
749 200 *pp = p + len;
750 200 return str;
751 }
752 ✗ no_iconv:
753 #endif
754 ✗ str = av_malloc(len + 1);
755 ✗ if (!str)
756 ✗ return NULL;
757 ✗ memcpy(str, p, len);
758 ✗ str[len] = '\0';
759 ✗ p += len;
760 ✗ *pp = p;
761 ✗ return str;
762 }
763
764 6437 static int parse_section_header(SectionHeader *h,
765 const uint8_t **pp, const uint8_t *p_end)
766 {
767 int val;
768
769 6437 val = get8(pp, p_end);
770
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 6437 if (val < 0)
771 ✗ return val;
772 6437 h->tid = val;
773 6437 *pp += 2;
774 6437 val = get16(pp, p_end);
775
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 6437 if (val < 0)
776 ✗ return val;
777 6437 h->id = val;
778 6437 val = get8(pp, p_end);
779
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 6437 if (val < 0)
780 ✗ return val;
781 6437 h->version = (val >> 1) & 0x1f;
782 6437 h->current_next = val & 0x01;
783 6437 val = get8(pp, p_end);
784
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 6437 if (val < 0)
785 ✗ return val;
786 6437 h->sec_num = val;
787 6437 val = get8(pp, p_end);
788
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 6437 if (val < 0)
789 ✗ return val;
790 6437 h->last_sec_num = val;
791 6437 return 0;
792 }
793
794 typedef struct StreamType {
795 uint32_t stream_type;
796 enum AVMediaType codec_type;
797 enum AVCodecID codec_id;
798 } StreamType;
799
800 static const StreamType ISO_types[] = {
801 { STREAM_TYPE_VIDEO_MPEG1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
802 { STREAM_TYPE_VIDEO_MPEG2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
803 { STREAM_TYPE_AUDIO_MPEG1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
804 { STREAM_TYPE_AUDIO_MPEG2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
805 { STREAM_TYPE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
806 { STREAM_TYPE_VIDEO_MPEG4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
807 /* Makito encoder sets stream type 0x11 for AAC,
808 * so auto-detect LOAS/LATM instead of hardcoding it. */
809 #if !CONFIG_LOAS_DEMUXER
810 { STREAM_TYPE_AUDIO_AAC_LATM, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
811 #endif
812 { STREAM_TYPE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
813 { STREAM_TYPE_AUDIO_MPEG4, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
814 { STREAM_TYPE_VIDEO_MVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
815 { STREAM_TYPE_VIDEO_JPEG2000, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
816 { STREAM_TYPE_VIDEO_HEVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
817 { STREAM_TYPE_VIDEO_VVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
818 { STREAM_TYPE_VIDEO_CAVS, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
819 { STREAM_TYPE_VIDEO_DIRAC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
820 { STREAM_TYPE_VIDEO_AVS2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
821 { STREAM_TYPE_VIDEO_AVS3, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
822 { STREAM_TYPE_VIDEO_VC1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
823 { 0 },
824 };
825
826 static const StreamType HDMV_types[] = {
827 { STREAM_TYPE_BLURAY_AUDIO_PCM_BLURAY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
828 { STREAM_TYPE_BLURAY_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
829 { STREAM_TYPE_BLURAY_AUDIO_DTS, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
830 { STREAM_TYPE_BLURAY_AUDIO_TRUEHD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
831 { STREAM_TYPE_BLURAY_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
832 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
833 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD_MASTER, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
834 { STREAM_TYPE_BLURAY_AUDIO_EAC3_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
835 { STREAM_TYPE_BLURAY_AUDIO_DTS_EXPRESS_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
836 { STREAM_TYPE_BLURAY_SUBTITLE_PGS, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
837 { STREAM_TYPE_BLURAY_SUBTITLE_TEXT, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
838 { 0 },
839 };
840
841 /* SCTE types */
842 static const StreamType SCTE_types[] = {
843 { STREAM_TYPE_SCTE_DATA_SCTE_35, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
844 { 0 },
845 };
846
847 /* ATSC ? */
848 static const StreamType MISC_types[] = {
849 { STREAM_TYPE_ATSC_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
850 { STREAM_TYPE_ATSC_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
851 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
852 { 0 },
853 };
854
855 /* HLS Sample Encryption Types */
856 static const StreamType HLS_SAMPLE_ENC_types[] = {
857 { STREAM_TYPE_HLS_SE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
858 { STREAM_TYPE_HLS_SE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
859 { STREAM_TYPE_HLS_SE_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
860 { STREAM_TYPE_HLS_SE_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
861 { 0 },
862 };
863
864 static const StreamType REGD_types[] = {
865 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
866 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
867 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
868 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
869 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
870 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
871 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
872 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
873 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
874 { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
875 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
876 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
877 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
878 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
879 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
880 { 0 },
881 };
882
883 static const StreamType METADATA_types[] = {
884 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
885 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
886 { 0 },
887 };
888
889 /* descriptor present */
890 static const StreamType DESC_types[] = {
891 { AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
892 { ENHANCED_AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
893 { DTS_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
894 { TELETEXT_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
895 { SUBTITLING_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE },
896 { 0 },
897 };
898
899 165 static void mpegts_find_stream_type(AVStream *st,
900 uint32_t stream_type,
901 const StreamType *types)
902 {
903 165 FFStream *const sti = ffstream(st);
904
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 955 for (; types->stream_type; types++)
905
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 902 if (stream_type == types->stream_type) {
906
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 112 if (st->codecpar->codec_type != types->codec_type ||
907
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 10 st->codecpar->codec_id != types->codec_id) {
908 111 st->codecpar->codec_type = types->codec_type;
909 111 st->codecpar->codec_id = types->codec_id;
910 111 sti->need_context_update = 1;
911 }
912 112 sti->request_probe = 0;
913 112 return;
914 }
915 }
916
917 105 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
918 uint32_t stream_type, uint32_t prog_reg_desc)
919 {
920 105 FFStream *const sti = ffstream(st);
921 105 int old_codec_type = st->codecpar->codec_type;
922 105 int old_codec_id = st->codecpar->codec_id;
923 105 int old_codec_tag = st->codecpar->codec_tag;
924
925 105 avpriv_set_pts_info(st, 33, 1, 90000);
926 105 st->priv_data = pes;
927 105 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
928 105 st->codecpar->codec_id = AV_CODEC_ID_NONE;
929 105 sti->need_parsing = AVSTREAM_PARSE_FULL;
930 105 pes->st = st;
931 105 pes->stream_type = stream_type;
932
933 105 av_log(pes->stream, AV_LOG_DEBUG,
934 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
935 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
936
937 105 st->codecpar->codec_tag = pes->stream_type;
938
939 105 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
940
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 105 if (pes->stream_type == STREAM_TYPE_AUDIO_MPEG2 || pes->stream_type == STREAM_TYPE_AUDIO_AAC)
941 7 sti->request_probe = 50;
942
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 105 if ((prog_reg_desc == AV_RL32("HDMV") ||
943
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 105 prog_reg_desc == AV_RL32("HDPR")) &&
944 ✗ st->codecpar->codec_id == AV_CODEC_ID_NONE) {
945 ✗ mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
946 ✗ if (pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD) {
947 // HDMV TrueHD streams also contain an AC3 coded version of the
948 // audio track - add a second stream for this
949 AVStream *sub_st;
950 // priv_data cannot be shared between streams
951 ✗ PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
952 ✗ if (!sub_pes)
953 ✗ return AVERROR(ENOMEM);
954
955 ✗ sub_st = avformat_new_stream(pes->stream, NULL);
956 ✗ if (!sub_st) {
957 ✗ av_free(sub_pes);
958 ✗ return AVERROR(ENOMEM);
959 }
960
961 ✗ sub_st->id = pes->pid;
962 ✗ avpriv_set_pts_info(sub_st, 33, 1, 90000);
963 ✗ sub_st->priv_data = sub_pes;
964 ✗ sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
965 ✗ sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
966 ✗ ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
967 ✗ sub_pes->sub_st = pes->sub_st = sub_st;
968 }
969 }
970
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
971 29 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
972
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
973 8 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
974
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
975 8 st->codecpar->codec_id = old_codec_id;
976 8 st->codecpar->codec_type = old_codec_type;
977 }
978
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 105 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
979
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 97 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
980
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 8 sti->probe_packets > 0 &&
981 stream_type == STREAM_TYPE_PRIVATE_DATA) {
982 5 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
983 5 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
984 5 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
985 }
986
987 /* queue a context update if properties changed */
988
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 105 if (old_codec_type != st->codecpar->codec_type ||
989
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 3 old_codec_id != st->codecpar->codec_id ||
990
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 3 old_codec_tag != st->codecpar->codec_tag)
991 105 sti->need_context_update = 1;
992
993 105 return 0;
994 }
995
996 55578 static void reset_pes_packet_state(PESContext *pes)
997 {
998 55578 pes->pts = AV_NOPTS_VALUE;
999 55578 pes->dts = AV_NOPTS_VALUE;
1000 55578 pes->data_index = 0;
1001 55578 pes->flags = 0;
1002 55578 av_buffer_unref(&pes->buffer);
1003 55578 }
1004
1005 12 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1006 {
1007 12 av_packet_unref(pkt);
1008 12 pkt->data = (uint8_t *)buffer;
1009 12 pkt->size = len;
1010 12 }
1011
1012 28864 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1013 {
1014 uint8_t *sd;
1015
1016 28864 av_packet_unref(pkt);
1017
1018 28864 pkt->buf = pes->buffer;
1019 28864 pkt->data = pes->buffer->data;
1020 28864 pkt->size = pes->data_index;
1021
1022
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 28864 if (pes->PES_packet_length &&
1023
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 25941 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1024 PES_START_SIZE) {
1025 90 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1026 90 pes->flags |= AV_PKT_FLAG_CORRUPT;
1027 }
1028 28864 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1029
1030 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1031
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 28864 if (pes->sub_st && pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD && pes->extended_stream_id == 0x76)
1032 ✗ pkt->stream_index = pes->sub_st->index;
1033 else
1034 28864 pkt->stream_index = pes->st->index;
1035 28864 pkt->pts = pes->pts;
1036 28864 pkt->dts = pes->dts;
1037 /* store position of first TS packet of this PES packet */
1038 28864 pkt->pos = pes->ts_packet_pos;
1039 28864 pkt->flags = pes->flags;
1040
1041 28864 pes->buffer = NULL;
1042 28864 reset_pes_packet_state(pes);
1043
1044 28864 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1045
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 28864 if (!sd)
1046 ✗ return AVERROR(ENOMEM);
1047 28864 *sd = pes->stream_id;
1048
1049 28864 return 0;
1050 }
1051
1052 ✗ static uint64_t get_ts64(GetBitContext *gb, int bits)
1053 {
1054 ✗ if (get_bits_left(gb) < bits)
1055 ✗ return AV_NOPTS_VALUE;
1056 ✗ return get_bits64(gb, bits);
1057 }
1058
1059 ✗ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1060 const uint8_t *buf, int buf_size)
1061 {
1062 GetBitContext gb;
1063 ✗ int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1064 ✗ int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1065 ✗ int dts_flag = -1, cts_flag = -1;
1066 ✗ int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1067 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1068 ✗ int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1069
1070 ✗ memcpy(buf_padded, buf, buf_padded_size);
1071
1072 ✗ init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1073
1074 ✗ if (sl->use_au_start)
1075 ✗ au_start_flag = get_bits1(&gb);
1076 ✗ if (sl->use_au_end)
1077 ✗ au_end_flag = get_bits1(&gb);
1078 ✗ if (!sl->use_au_start && !sl->use_au_end)
1079 ✗ au_start_flag = au_end_flag = 1;
1080 ✗ if (sl->ocr_len > 0)
1081 ✗ ocr_flag = get_bits1(&gb);
1082 ✗ if (sl->use_idle)
1083 ✗ idle_flag = get_bits1(&gb);
1084 ✗ if (sl->use_padding)
1085 ✗ padding_flag = get_bits1(&gb);
1086 ✗ if (padding_flag)
1087 ✗ padding_bits = get_bits(&gb, 3);
1088
1089 ✗ if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1090 ✗ if (sl->packet_seq_num_len)
1091 ✗ skip_bits_long(&gb, sl->packet_seq_num_len);
1092 ✗ if (sl->degr_prior_len)
1093 ✗ if (get_bits1(&gb))
1094 ✗ skip_bits(&gb, sl->degr_prior_len);
1095 ✗ if (ocr_flag)
1096 ✗ skip_bits_long(&gb, sl->ocr_len);
1097 ✗ if (au_start_flag) {
1098 ✗ if (sl->use_rand_acc_pt)
1099 ✗ get_bits1(&gb);
1100 ✗ if (sl->au_seq_num_len > 0)
1101 ✗ skip_bits_long(&gb, sl->au_seq_num_len);
1102 ✗ if (sl->use_timestamps) {
1103 ✗ dts_flag = get_bits1(&gb);
1104 ✗ cts_flag = get_bits1(&gb);
1105 }
1106 }
1107 ✗ if (sl->inst_bitrate_len)
1108 ✗ inst_bitrate_flag = get_bits1(&gb);
1109 ✗ if (dts_flag == 1)
1110 ✗ dts = get_ts64(&gb, sl->timestamp_len);
1111 ✗ if (cts_flag == 1)
1112 ✗ cts = get_ts64(&gb, sl->timestamp_len);
1113 ✗ if (sl->au_len > 0)
1114 ✗ skip_bits_long(&gb, sl->au_len);
1115 ✗ if (inst_bitrate_flag)
1116 ✗ skip_bits_long(&gb, sl->inst_bitrate_len);
1117 }
1118
1119 ✗ if (dts != AV_NOPTS_VALUE)
1120 ✗ pes->dts = dts;
1121 ✗ if (cts != AV_NOPTS_VALUE)
1122 ✗ pes->pts = cts;
1123
1124 ✗ if (sl->timestamp_len && sl->timestamp_res)
1125 ✗ avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1126
1127 ✗ return (get_bits_count(&gb) + 7) >> 3;
1128 }
1129
1130 28965 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1131 {
1132 28965 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1133
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 28965 if (!ts->pools[index]) {
1134
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 158 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1135 158 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1136
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 158 if (!ts->pools[index])
1137 ✗ return NULL;
1138 }
1139 28965 return av_buffer_pool_get(ts->pools[index]);
1140 }
1141
1142 /* return non zero if a packet could be constructed */
1143 373889 static int mpegts_push_data(MpegTSFilter *filter,
1144 const uint8_t *buf, int buf_size, int is_start,
1145 int64_t pos)
1146 {
1147 373889 PESContext *pes = filter->u.pes_filter.opaque;
1148 373889 MpegTSContext *ts = pes->ts;
1149 const uint8_t *p;
1150 int ret, len;
1151
1152
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 373889 if (!ts->pkt)
1153 ✗ return 0;
1154
1155
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 373889 if (is_start) {
1156
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 29565 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1157 2851 ret = new_pes_packet(pes, ts->pkt);
1158
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 2851 if (ret < 0)
1159 ✗ return ret;
1160 2851 ts->stop_parse = 1;
1161 } else {
1162 26714 reset_pes_packet_state(pes);
1163 }
1164 29565 pes->state = MPEGTS_HEADER;
1165 29565 pes->ts_packet_pos = pos;
1166 }
1167 373889 p = buf;
1168
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 1209160 while (buf_size > 0) {
1169
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 461382 switch (pes->state) {
1170 29565 case MPEGTS_HEADER:
1171 29565 len = PES_START_SIZE - pes->data_index;
1172
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 29565 if (len > buf_size)
1173 2 len = buf_size;
1174 29565 memcpy(pes->header + pes->data_index, p, len);
1175 29565 pes->data_index += len;
1176 29565 p += len;
1177 29565 buf_size -= len;
1178
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 29565 if (pes->data_index == PES_START_SIZE) {
1179 /* we got all the PES or section header. We can now
1180 * decide */
1181
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 29563 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1182
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 29556 pes->header[2] == 0x01) {
1183 /* it must be an MPEG-2 PES stream */
1184 29556 pes->stream_id = pes->header[3];
1185 29556 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1186
1187
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 29556 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1188
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 591 (!pes->sub_st ||
1189 ✗ pes->sub_st->discard == AVDISCARD_ALL)) ||
1190
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 28965 pes->stream_id == STREAM_ID_PADDING_STREAM)
1191 591 goto skip;
1192
1193 /* stream not present in PMT */
1194
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 28965 if (!pes->st) {
1195 ✗ if (ts->skip_changes)
1196 ✗ goto skip;
1197 ✗ if (ts->merge_pmt_versions)
1198 ✗ goto skip; /* wait for PMT to merge new stream */
1199
1200 ✗ pes->st = avformat_new_stream(ts->stream, NULL);
1201 ✗ if (!pes->st)
1202 ✗ return AVERROR(ENOMEM);
1203 ✗ pes->st->id = pes->pid;
1204 ✗ mpegts_set_stream_info(pes->st, pes, 0, 0);
1205 }
1206
1207 28965 pes->PES_packet_length = AV_RB16(pes->header + 4);
1208 /* NOTE: zero length means the PES size is unbounded */
1209
1210
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 28965 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1211
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 28965 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1212
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 28965 pes->stream_id != STREAM_ID_ECM_STREAM &&
1213
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 28965 pes->stream_id != STREAM_ID_EMM_STREAM &&
1214
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 28965 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1215
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 28965 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1216
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 57930 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1217 28965 FFStream *const pes_sti = ffstream(pes->st);
1218 28965 pes->state = MPEGTS_PESHEADER;
1219
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 28965 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1220 2 av_log(pes->stream, AV_LOG_TRACE,
1221 "pid=%x stream_type=%x probing\n",
1222 pes->pid,
1223 pes->stream_type);
1224 2 pes_sti->request_probe = 1;
1225 }
1226 } else {
1227 ✗ pes->pes_header_size = 6;
1228 ✗ pes->state = MPEGTS_PAYLOAD;
1229 ✗ pes->data_index = 0;
1230 }
1231 } else {
1232 /* otherwise, it should be a table */
1233 /* skip packet */
1234 7 skip:
1235 598 pes->state = MPEGTS_SKIP;
1236 598 continue;
1237 }
1238 }
1239 28967 break;
1240 /**********************************************/
1241 /* PES packing parsing */
1242 28965 case MPEGTS_PESHEADER:
1243 28965 len = PES_HEADER_SIZE - pes->data_index;
1244
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 28965 if (len < 0)
1245 ✗ return AVERROR_INVALIDDATA;
1246
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 28965 if (len > buf_size)
1247 ✗ len = buf_size;
1248 28965 memcpy(pes->header + pes->data_index, p, len);
1249 28965 pes->data_index += len;
1250 28965 p += len;
1251 28965 buf_size -= len;
1252
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 28965 if (pes->data_index == PES_HEADER_SIZE) {
1253 28965 pes->pes_header_size = pes->header[8] + 9;
1254 28965 pes->state = MPEGTS_PESHEADER_FILL;
1255 }
1256 28965 break;
1257 28965 case MPEGTS_PESHEADER_FILL:
1258 28965 len = pes->pes_header_size - pes->data_index;
1259
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 28965 if (len < 0)
1260 ✗ return AVERROR_INVALIDDATA;
1261
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 28965 if (len > buf_size)
1262 ✗ len = buf_size;
1263 28965 memcpy(pes->header + pes->data_index, p, len);
1264 28965 pes->data_index += len;
1265 28965 p += len;
1266 28965 buf_size -= len;
1267
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 28965 if (pes->data_index == pes->pes_header_size) {
1268 const uint8_t *r;
1269 unsigned int flags, pes_ext, skip;
1270
1271 28965 flags = pes->header[7];
1272 28965 r = pes->header + 9;
1273 28965 pes->pts = AV_NOPTS_VALUE;
1274 28965 pes->dts = AV_NOPTS_VALUE;
1275
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 28965 if ((flags & 0xc0) == 0x80) {
1276 10066 pes->dts = pes->pts = ff_parse_pes_pts(r);
1277 10066 r += 5;
1278
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 18899 } else if ((flags & 0xc0) == 0xc0) {
1279 1854 pes->pts = ff_parse_pes_pts(r);
1280 1854 r += 5;
1281 1854 pes->dts = ff_parse_pes_pts(r);
1282 1854 r += 5;
1283 }
1284 28965 pes->extended_stream_id = -1;
1285
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 28965 if (flags & 0x01) { /* PES extension */
1286 ✗ pes_ext = *r++;
1287 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1288 ✗ skip = (pes_ext >> 4) & 0xb;
1289 ✗ skip += skip & 0x9;
1290 ✗ r += skip;
1291 ✗ if ((pes_ext & 0x41) == 0x01 &&
1292 ✗ (r + 2) <= (pes->header + pes->pes_header_size)) {
1293 /* PES extension 2 */
1294 ✗ if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1295 ✗ pes->extended_stream_id = r[1];
1296 }
1297 }
1298
1299 /* we got the full header. We parse it and get the payload */
1300 28965 pes->state = MPEGTS_PAYLOAD;
1301 28965 pes->data_index = 0;
1302
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 28965 if (pes->stream_type == STREAM_TYPE_ISO_IEC_14496_PES && buf_size > 0) {
1303 ✗ int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1304 buf_size);
1305 ✗ pes->pes_header_size += sl_header_bytes;
1306 ✗ p += sl_header_bytes;
1307 ✗ buf_size -= sl_header_bytes;
1308 }
1309
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 28965 if (pes->stream_type == STREAM_TYPE_METADATA &&
1310
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 6 pes->stream_id == STREAM_ID_METADATA_STREAM &&
1311 ✗ pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV &&
1312 buf_size >= 5) {
1313 /* skip metadata access unit header - see MISB ST 1402 */
1314 ✗ pes->pes_header_size += 5;
1315 ✗ p += 5;
1316 ✗ buf_size -= 5;
1317 }
1318
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 28965 if ( pes->ts->fix_teletext_pts
1319
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 28965 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1320
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✓ Branch 1 taken 28712 times.
 28965 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1321 ) {
1322 253 AVProgram *p = NULL;
1323 253 int pcr_found = 0;
1324
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 506 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1325
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 253 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1326 253 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1327
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 253 if (f) {
1328 253 AVStream *st = NULL;
1329
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✗ Branch 1 not taken.
 253 if (f->type == MPEGTS_PES) {
1330 253 PESContext *pcrpes = f->u.pes_filter.opaque;
1331
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✗ Branch 1 not taken.
 253 if (pcrpes)
1332 253 st = pcrpes->st;
1333 ✗ } else if (f->type == MPEGTS_PCR) {
1334 int i;
1335 ✗ for (i = 0; i < p->nb_stream_indexes; i++) {
1336 ✗ AVStream *pst = pes->stream->streams[p->stream_index[i]];
1337 ✗ if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1338 ✗ st = pst;
1339 }
1340 }
1341
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 253 if (f->last_pcr != -1 && !f->discard) {
1342 // teletext packets do not always have correct timestamps,
1343 // the standard says they should be handled after 40.6 ms at most,
1344 // and the pcr error to this packet should be no more than 100 ms.
1345 // TODO: we should interpolate the PCR, not just use the last one
1346 ✗ int64_t pcr = f->last_pcr / SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1347 ✗ pcr_found = 1;
1348 ✗ if (st) {
1349 ✗ const FFStream *const sti = ffstream(st);
1350 ✗ FFStream *const pes_sti = ffstream(pes->st);
1351
1352 ✗ pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1353 ✗ pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1354 }
1355 ✗ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1356 ✗ pes->pts = pes->dts = pcr;
1357 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1358 ✗ pes->dts > pcr + 3654 + 9000) {
1359 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1360 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1361 ✗ pes->dts > pcr + 10*90000) { //10sec
1362 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1363 }
1364 ✗ break;
1365 }
1366 }
1367 }
1368 }
1369
1370
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 253 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1371 !pcr_found) {
1372 ✗ av_log(pes->stream, AV_LOG_VERBOSE,
1373 "Forcing DTS/PTS to be unset for a "
1374 "non-trustworthy PES packet for PID %d as "
1375 "PCR hasn't been received yet.\n",
1376 pes->pid);
1377 ✗ pes->dts = pes->pts = AV_NOPTS_VALUE;
1378 }
1379 }
1380 }
1381 28965 break;
1382 355345 case MPEGTS_PAYLOAD:
1383 do {
1384 355345 int max_packet_size = ts->max_packet_size;
1385
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 355345 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1386 195089 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1387
1388
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 355345 if (pes->data_index > 0 &&
1389
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 326380 pes->data_index + buf_size > max_packet_size) {
1390 ✗ ret = new_pes_packet(pes, ts->pkt);
1391 ✗ if (ret < 0)
1392 ✗ return ret;
1393 ✗ pes->PES_packet_length = 0;
1394 ✗ max_packet_size = ts->max_packet_size;
1395 ✗ ts->stop_parse = 1;
1396
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 355345 } else if (pes->data_index == 0 &&
1397 buf_size > max_packet_size) {
1398 // pes packet size is < ts size packet and pes data is padded with STUFFING_BYTE
1399 // not sure if this is legal in ts but see issue #2392
1400 ✗ buf_size = max_packet_size;
1401 }
1402
1403
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 355345 if (!pes->buffer) {
1404 28965 pes->buffer = buffer_pool_get(ts, max_packet_size);
1405
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 28965 if (!pes->buffer)
1406 ✗ return AVERROR(ENOMEM);
1407 }
1408
1409 355345 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1410 355345 pes->data_index += buf_size;
1411 /* emit complete packets with known packet size
1412 * decreases demuxer delay for infrequent packets like subtitles from
1413 * a couple of seconds to milliseconds for properly muxed files. */
1414
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 355345 if (!ts->stop_parse && pes->PES_packet_length &&
1415
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 195089 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1416 25851 ts->stop_parse = 1;
1417 25851 ret = new_pes_packet(pes, ts->pkt);
1418 25851 pes->state = MPEGTS_SKIP;
1419
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 25851 if (ret < 0)
1420 ✗ return ret;
1421 }
1422 } while (0);
1423 355345 buf_size = 0;
1424 355345 break;
1425 18542 case MPEGTS_SKIP:
1426 18542 buf_size = 0;
1427 18542 break;
1428 }
1429 }
1430
1431 373889 return 0;
1432 }
1433
1434 126 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1435 {
1436 MpegTSFilter *tss;
1437 PESContext *pes;
1438
1439 /* if no pid found, then add a pid context */
1440 126 pes = av_mallocz(sizeof(PESContext));
1441
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 126 if (!pes)
1442 ✗ return 0;
1443 126 pes->ts = ts;
1444 126 pes->stream = ts->stream;
1445 126 pes->pid = pid;
1446 126 pes->pcr_pid = pcr_pid;
1447 126 pes->state = MPEGTS_SKIP;
1448 126 pes->pts = AV_NOPTS_VALUE;
1449 126 pes->dts = AV_NOPTS_VALUE;
1450 126 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1451
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 126 if (!tss) {
1452 ✗ av_free(pes);
1453 ✗ return 0;
1454 }
1455 126 return pes;
1456 }
1457
1458 #define MAX_LEVEL 4
1459 typedef struct MP4DescrParseContext {
1460 AVFormatContext *s;
1461 FFIOContext pb;
1462 Mp4Descr *descr;
1463 Mp4Descr *active_descr;
1464 int descr_count;
1465 int max_descr_count;
1466 int level;
1467 int predefined_SLConfigDescriptor_seen;
1468 } MP4DescrParseContext;
1469
1470 ✗ static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1471 const uint8_t *buf, unsigned size,
1472 Mp4Descr *descr, int max_descr_count)
1473 {
1474 ✗ if (size > (1 << 30))
1475 ✗ return AVERROR_INVALIDDATA;
1476
1477 ✗ ffio_init_read_context(&d->pb, buf, size);
1478
1479 ✗ d->s = s;
1480 ✗ d->level = 0;
1481 ✗ d->descr_count = 0;
1482 ✗ d->descr = descr;
1483 ✗ d->active_descr = NULL;
1484 ✗ d->max_descr_count = max_descr_count;
1485
1486 ✗ return 0;
1487 }
1488
1489 ✗ static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1490 {
1491 ✗ int64_t new_off = avio_tell(pb);
1492 ✗ (*len) -= new_off - *off;
1493 ✗ *off = new_off;
1494 ✗ }
1495
1496 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1497 int target_tag);
1498
1499 ✗ static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1500 {
1501 ✗ while (len > 0) {
1502 ✗ int ret = parse_mp4_descr(d, off, len, 0);
1503 ✗ if (ret < 0)
1504 ✗ return ret;
1505 ✗ update_offsets(&d->pb.pub, &off, &len);
1506 }
1507 ✗ return 0;
1508 }
1509
1510 ✗ static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1511 {
1512 ✗ AVIOContext *const pb = &d->pb.pub;
1513 ✗ avio_rb16(pb); // ID
1514 ✗ avio_r8(pb);
1515 ✗ avio_r8(pb);
1516 ✗ avio_r8(pb);
1517 ✗ avio_r8(pb);
1518 ✗ avio_r8(pb);
1519 ✗ update_offsets(pb, &off, &len);
1520 ✗ return parse_mp4_descr_arr(d, off, len);
1521 }
1522
1523 ✗ static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1524 {
1525 int id_flags;
1526 ✗ if (len < 2)
1527 ✗ return 0;
1528 ✗ id_flags = avio_rb16(&d->pb.pub);
1529 ✗ if (!(id_flags & 0x0020)) { // URL_Flag
1530 ✗ update_offsets(&d->pb.pub, &off, &len);
1531 ✗ return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1532 } else {
1533 ✗ return 0;
1534 }
1535 }
1536
1537 ✗ static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1538 {
1539 ✗ AVIOContext *const pb = &d->pb.pub;
1540 ✗ int es_id = 0;
1541 ✗ int ret = 0;
1542
1543 ✗ if (d->descr_count >= d->max_descr_count)
1544 ✗ return AVERROR_INVALIDDATA;
1545 ✗ ff_mp4_parse_es_descr(pb, &es_id);
1546 ✗ d->active_descr = d->descr + (d->descr_count++);
1547
1548 ✗ d->active_descr->es_id = es_id;
1549 ✗ update_offsets(pb, &off, &len);
1550 ✗ if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1551 ✗ return ret;
1552 ✗ update_offsets(pb, &off, &len);
1553 ✗ if (len > 0)
1554 ✗ ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1555 ✗ d->active_descr = NULL;
1556 ✗ return ret;
1557 }
1558
1559 ✗ static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1560 int len)
1561 {
1562 ✗ Mp4Descr *descr = d->active_descr;
1563 ✗ if (!descr)
1564 ✗ return AVERROR_INVALIDDATA;
1565 ✗ d->active_descr->dec_config_descr = av_malloc(len);
1566 ✗ if (!descr->dec_config_descr)
1567 ✗ return AVERROR(ENOMEM);
1568 ✗ descr->dec_config_descr_len = len;
1569 ✗ avio_read(&d->pb.pub, descr->dec_config_descr, len);
1570 ✗ return 0;
1571 }
1572
1573 ✗ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1574 {
1575 ✗ Mp4Descr *descr = d->active_descr;
1576 ✗ AVIOContext *const pb = &d->pb.pub;
1577 int predefined;
1578 ✗ if (!descr)
1579 ✗ return AVERROR_INVALIDDATA;
1580
1581 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1582 descr->sl.dst = avio_r8(pb); \
1583 if (descr->sl.dst > maxv) { \
1584 descr->sl.dst = maxv; \
1585 return AVERROR_INVALIDDATA; \
1586 } \
1587 } while (0)
1588
1589 ✗ predefined = avio_r8(pb);
1590 ✗ if (!predefined) {
1591 int lengths;
1592 ✗ int flags = avio_r8(pb);
1593 ✗ descr->sl.use_au_start = !!(flags & 0x80);
1594 ✗ descr->sl.use_au_end = !!(flags & 0x40);
1595 ✗ descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1596 ✗ descr->sl.use_padding = !!(flags & 0x08);
1597 ✗ descr->sl.use_timestamps = !!(flags & 0x04);
1598 ✗ descr->sl.use_idle = !!(flags & 0x02);
1599 ✗ descr->sl.timestamp_res = avio_rb32(pb);
1600 ✗ avio_rb32(pb);
1601 ✗ R8_CHECK_CLIP_MAX(timestamp_len, 63);
1602 ✗ R8_CHECK_CLIP_MAX(ocr_len, 63);
1603 ✗ R8_CHECK_CLIP_MAX(au_len, 31);
1604 ✗ descr->sl.inst_bitrate_len = avio_r8(pb);
1605 ✗ lengths = avio_rb16(pb);
1606 ✗ descr->sl.degr_prior_len = lengths >> 12;
1607 ✗ descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1608 ✗ descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1609 ✗ } else if (!d->predefined_SLConfigDescriptor_seen){
1610 ✗ avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1611 ✗ d->predefined_SLConfigDescriptor_seen = 1;
1612 }
1613 ✗ return 0;
1614 }
1615
1616 ✗ static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1617 int target_tag)
1618 {
1619 int tag;
1620 ✗ AVIOContext *const pb = &d->pb.pub;
1621 ✗ int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1622 ✗ int ret = 0;
1623
1624 ✗ update_offsets(pb, &off, &len);
1625 ✗ if (len < 0 || len1 > len || len1 <= 0) {
1626 ✗ av_log(d->s, AV_LOG_ERROR,
1627 "Tag %x length violation new length %d bytes remaining %d\n",
1628 tag, len1, len);
1629 ✗ return AVERROR_INVALIDDATA;
1630 }
1631
1632 ✗ if (d->level++ >= MAX_LEVEL) {
1633 ✗ av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1634 ✗ ret = AVERROR_INVALIDDATA;
1635 ✗ goto done;
1636 }
1637
1638 ✗ if (target_tag && tag != target_tag) {
1639 ✗ av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1640 target_tag);
1641 ✗ ret = AVERROR_INVALIDDATA;
1642 ✗ goto done;
1643 }
1644
1645 ✗ switch (tag) {
1646 ✗ case MP4IODescrTag:
1647 ✗ ret = parse_MP4IODescrTag(d, off, len1);
1648 ✗ break;
1649 ✗ case MP4ODescrTag:
1650 ✗ ret = parse_MP4ODescrTag(d, off, len1);
1651 ✗ break;
1652 ✗ case MP4ESDescrTag:
1653 ✗ ret = parse_MP4ESDescrTag(d, off, len1);
1654 ✗ break;
1655 ✗ case MP4DecConfigDescrTag:
1656 ✗ ret = parse_MP4DecConfigDescrTag(d, off, len1);
1657 ✗ break;
1658 ✗ case MP4SLDescrTag:
1659 ✗ ret = parse_MP4SLDescrTag(d, off, len1);
1660 ✗ break;
1661 }
1662
1663
1664 ✗ done:
1665 ✗ d->level--;
1666 ✗ avio_seek(pb, off + len1, SEEK_SET);
1667 ✗ return ret;
1668 }
1669
1670 ✗ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1671 Mp4Descr *descr, int *descr_count, int max_descr_count)
1672 {
1673 MP4DescrParseContext d;
1674 int ret;
1675
1676 ✗ d.predefined_SLConfigDescriptor_seen = 0;
1677
1678 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1679 ✗ if (ret < 0)
1680 ✗ return ret;
1681
1682 ✗ ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1683
1684 ✗ *descr_count = d.descr_count;
1685 ✗ return ret;
1686 }
1687
1688 ✗ static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1689 Mp4Descr *descr, int *descr_count, int max_descr_count)
1690 {
1691 MP4DescrParseContext d;
1692 int ret;
1693
1694 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1695 ✗ if (ret < 0)
1696 ✗ return ret;
1697
1698 ✗ ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1699
1700 ✗ *descr_count = d.descr_count;
1701 ✗ return ret;
1702 }
1703
1704 ✗ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1705 int section_len)
1706 {
1707 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1708 ✗ MpegTSSectionFilter *tssf = &filter->u.section_filter;
1709 SectionHeader h;
1710 const uint8_t *p, *p_end;
1711 ✗ int mp4_descr_count = 0;
1712 ✗ Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1713 int i, pid;
1714 ✗ AVFormatContext *s = ts->stream;
1715
1716 ✗ p_end = section + section_len - 4;
1717 ✗ p = section;
1718 ✗ if (parse_section_header(&h, &p, p_end) < 0)
1719 ✗ return;
1720 ✗ if (h.tid != M4OD_TID)
1721 ✗ return;
1722 ✗ if (skip_identical(&h, tssf))
1723 ✗ return;
1724
1725 ✗ mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1726 MAX_MP4_DESCR_COUNT);
1727
1728 ✗ for (pid = 0; pid < NB_PID_MAX; pid++) {
1729 ✗ if (!ts->pids[pid])
1730 ✗ continue;
1731 ✗ for (i = 0; i < mp4_descr_count; i++) {
1732 PESContext *pes;
1733 AVStream *st;
1734 FFStream *sti;
1735 FFIOContext pb;
1736 ✗ if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1737 ✗ continue;
1738 ✗ if (ts->pids[pid]->type != MPEGTS_PES) {
1739 ✗ av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1740 ✗ continue;
1741 }
1742 ✗ pes = ts->pids[pid]->u.pes_filter.opaque;
1743 ✗ st = pes->st;
1744 ✗ if (!st)
1745 ✗ continue;
1746 ✗ sti = ffstream(st);
1747
1748 ✗ pes->sl = mp4_descr[i].sl;
1749
1750 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1751 mp4_descr[i].dec_config_descr_len);
1752 ✗ ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1753 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1754 ✗ st->codecpar->extradata_size > 0)
1755 ✗ sti->need_parsing = 0;
1756 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1757 ✗ st->codecpar->extradata_size > 0)
1758 ✗ sti->need_parsing = 0;
1759
1760 ✗ st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1761 ✗ sti->need_context_update = 1;
1762 }
1763 }
1764 ✗ for (i = 0; i < mp4_descr_count; i++)
1765 ✗ av_free(mp4_descr[i].dec_config_descr);
1766 }
1767
1768 ✗ static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1769 int section_len)
1770 {
1771 ✗ AVProgram *prg = NULL;
1772 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1773
1774 ✗ int idx = ff_find_stream_index(ts->stream, filter->pid);
1775 ✗ if (idx < 0)
1776 ✗ return;
1777
1778 /**
1779 * In case we receive an SCTE-35 packet before mpegts context is fully
1780 * initialized.
1781 */
1782 ✗ if (!ts->pkt)
1783 ✗ return;
1784
1785 ✗ new_data_packet(section, section_len, ts->pkt);
1786 ✗ ts->pkt->stream_index = idx;
1787 ✗ prg = av_find_program_from_stream(ts->stream, NULL, idx);
1788 ✗ if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1789 ✗ MpegTSFilter *f = ts->pids[prg->pcr_pid];
1790 ✗ if (f && f->last_pcr != -1)
1791 ✗ ts->pkt->pts = ts->pkt->dts = f->last_pcr/SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1792 }
1793 ✗ ts->stop_parse = 1;
1794
1795 }
1796
1797 static const uint8_t opus_coupled_stream_cnt[9] = {
1798 1, 0, 1, 1, 2, 2, 2, 3, 3
1799 };
1800
1801 static const uint8_t opus_stream_cnt[9] = {
1802 1, 1, 1, 2, 2, 3, 4, 4, 5,
1803 };
1804
1805 static const uint8_t opus_channel_map[8][8] = {
1806 { 0 },
1807 { 0,1 },
1808 { 0,2,1 },
1809 { 0,1,2,3 },
1810 { 0,4,1,2,3 },
1811 { 0,4,1,2,3,5 },
1812 { 0,4,1,2,3,5,6 },
1813 { 0,6,1,2,3,4,5,7 },
1814 };
1815
1816 933 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1817 const uint8_t **pp, const uint8_t *desc_list_end,
1818 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1819 MpegTSContext *ts)
1820 {
1821 933 FFStream *const sti = ffstream(st);
1822 const uint8_t *desc_end;
1823 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1824 char language[252];
1825 int i;
1826
1827 933 desc_tag = get8(pp, desc_list_end);
1828
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 933 if (desc_tag < 0)
1829 559 return AVERROR_INVALIDDATA;
1830 374 desc_len = get8(pp, desc_list_end);
1831
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 374 if (desc_len < 0)
1832 ✗ return AVERROR_INVALIDDATA;
1833 374 desc_end = *pp + desc_len;
1834
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 374 if (desc_end > desc_list_end)
1835 ✗ return AVERROR_INVALIDDATA;
1836
1837 374 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1838
1839
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 374 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1840 stream_type == STREAM_TYPE_PRIVATE_DATA)
1841 12 mpegts_find_stream_type(st, desc_tag, DESC_types);
1842
1843
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 374 switch (desc_tag) {
1844 ✗ case VIDEO_STREAM_DESCRIPTOR:
1845 ✗ if (get8(pp, desc_end) & 0x1) {
1846 ✗ st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1847 }
1848 ✗ break;
1849 ✗ case SL_DESCRIPTOR:
1850 ✗ desc_es_id = get16(pp, desc_end);
1851 ✗ if (desc_es_id < 0)
1852 ✗ break;
1853 ✗ if (ts && ts->pids[pid])
1854 ✗ ts->pids[pid]->es_id = desc_es_id;
1855 ✗ for (i = 0; i < mp4_descr_count; i++)
1856 ✗ if (mp4_descr[i].dec_config_descr_len &&
1857 ✗ mp4_descr[i].es_id == desc_es_id) {
1858 FFIOContext pb;
1859 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1860 ✗ mp4_descr[i].dec_config_descr_len);
1861 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1862 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1863 ✗ st->codecpar->extradata_size > 0) {
1864 ✗ sti->need_parsing = 0;
1865 ✗ sti->need_context_update = 1;
1866 }
1867 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1868 ✗ mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1869 }
1870 ✗ break;
1871 ✗ case FMC_DESCRIPTOR:
1872 ✗ if (get16(pp, desc_end) < 0)
1873 ✗ break;
1874 ✗ if (mp4_descr_count > 0 &&
1875 ✗ (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1876 ✗ (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1877 ✗ sti->request_probe > 0) &&
1878 ✗ mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1879 FFIOContext pb;
1880 ✗ ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1881 mp4_descr->dec_config_descr_len);
1882 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1883 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1884 ✗ st->codecpar->extradata_size > 0) {
1885 ✗ sti->request_probe = sti->need_parsing = 0;
1886 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1887 ✗ sti->need_context_update = 1;
1888 }
1889 }
1890 ✗ break;
1891 ✗ case TELETEXT_DESCRIPTOR:
1892 {
1893 ✗ uint8_t *extradata = NULL;
1894 ✗ int language_count = desc_len / 5, ret;
1895
1896 ✗ if (desc_len > 0 && desc_len % 5 != 0)
1897 ✗ return AVERROR_INVALIDDATA;
1898
1899 ✗ if (language_count > 0) {
1900 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1901 ✗ av_assert0(language_count <= sizeof(language) / 4);
1902
1903 ✗ if (st->codecpar->extradata == NULL) {
1904 ✗ ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1905 ✗ if (ret < 0)
1906 ✗ return ret;
1907 }
1908
1909 ✗ if (st->codecpar->extradata_size < language_count * 2)
1910 ✗ return AVERROR_INVALIDDATA;
1911
1912 ✗ extradata = st->codecpar->extradata;
1913
1914 ✗ for (i = 0; i < language_count; i++) {
1915 ✗ language[i * 4 + 0] = get8(pp, desc_end);
1916 ✗ language[i * 4 + 1] = get8(pp, desc_end);
1917 ✗ language[i * 4 + 2] = get8(pp, desc_end);
1918 ✗ language[i * 4 + 3] = ',';
1919
1920 ✗ memcpy(extradata, *pp, 2);
1921 ✗ extradata += 2;
1922
1923 ✗ *pp += 2;
1924 }
1925
1926 ✗ language[i * 4 - 1] = 0;
1927 ✗ av_dict_set(&st->metadata, "language", language, 0);
1928 ✗ sti->need_context_update = 1;
1929 }
1930 }
1931 ✗ break;
1932 9 case SUBTITLING_DESCRIPTOR:
1933 {
1934 /* 8 bytes per DVB subtitle substream data:
1935 * ISO_639_language_code (3 bytes),
1936 * subtitling_type (1 byte),
1937 * composition_page_id (2 bytes),
1938 * ancillary_page_id (2 bytes) */
1939 9 int language_count = desc_len / 8, ret;
1940
1941
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 9 if (desc_len > 0 && desc_len % 8 != 0)
1942 ✗ return AVERROR_INVALIDDATA;
1943
1944
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 9 if (language_count > 1) {
1945 ✗ avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1946 }
1947
1948
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 9 if (language_count > 0) {
1949 uint8_t *extradata;
1950
1951 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1952
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 9 av_assert0(language_count <= sizeof(language) / 4);
1953
1954
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 9 if (st->codecpar->extradata == NULL) {
1955 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1956
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 3 if (ret < 0)
1957 ✗ return ret;
1958 }
1959
1960
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 9 if (st->codecpar->extradata_size < language_count * 5)
1961 ✗ return AVERROR_INVALIDDATA;
1962
1963 9 extradata = st->codecpar->extradata;
1964
1965
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 18 for (i = 0; i < language_count; i++) {
1966 9 language[i * 4 + 0] = get8(pp, desc_end);
1967 9 language[i * 4 + 1] = get8(pp, desc_end);
1968 9 language[i * 4 + 2] = get8(pp, desc_end);
1969 9 language[i * 4 + 3] = ',';
1970
1971 /* hearing impaired subtitles detection using subtitling_type */
1972
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 9 switch (*pp[0]) {
1973 ✗ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1974 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1975 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1976 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1977 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1978 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1979 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1980 ✗ break;
1981 }
1982
1983 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1984 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1985 9 extradata += 5;
1986
1987 9 *pp += 4;
1988 }
1989
1990 9 language[i * 4 - 1] = 0;
1991 9 av_dict_set(&st->metadata, "language", language, 0);
1992 9 sti->need_context_update = 1;
1993 }
1994 }
1995 9 break;
1996 252 case ISO_639_LANGUAGE_DESCRIPTOR:
1997
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 498 for (i = 0; i + 4 <= desc_len; i += 4) {
1998 246 language[i + 0] = get8(pp, desc_end);
1999 246 language[i + 1] = get8(pp, desc_end);
2000 246 language[i + 2] = get8(pp, desc_end);
2001 246 language[i + 3] = ',';
2002
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 246 switch (get8(pp, desc_end)) {
2003 ✗ case 0x01:
2004 ✗ st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2005 ✗ break;
2006 ✗ case 0x02:
2007 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2008 ✗ break;
2009 60 case 0x03:
2010 60 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2011 60 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2012 60 break;
2013 }
2014 }
2015
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 252 if (i && language[0]) {
2016 242 language[i - 1] = 0;
2017 /* don't overwrite language, as it may already have been set by
2018 * another, more specific descriptor (e.g. supplementary audio) */
2019 242 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2020 }
2021 252 break;
2022 8 case REGISTRATION_DESCRIPTOR:
2023 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2024 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2025
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 8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2026 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2027
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 3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2028 2 sti->request_probe = 50;
2029 }
2030 8 break;
2031 31 case STREAM_IDENTIFIER_DESCRIPTOR:
2032 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2033 31 break;
2034 4 case METADATA_DESCRIPTOR:
2035
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 4 if (get16(pp, desc_end) == 0xFFFF)
2036 4 *pp += 4;
2037
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 4 if (get8(pp, desc_end) == 0xFF) {
2038 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2039
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2040 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2041 }
2042 4 break;
2043 4 case EXTENSION_DESCRIPTOR: /* DVB extension descriptor */
2044 4 ext_desc_tag = get8(pp, desc_end);
2045
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 4 if (ext_desc_tag < 0)
2046 ✗ return AVERROR_INVALIDDATA;
2047
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2048 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2049
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 3 if (!st->codecpar->extradata) {
2050 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2051 AV_INPUT_BUFFER_PADDING_SIZE);
2052
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 1 if (!st->codecpar->extradata)
2053 ✗ return AVERROR(ENOMEM);
2054
2055 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2056 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2057
2058 1 channel_config_code = get8(pp, desc_end);
2059
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 1 if (channel_config_code < 0)
2060 ✗ return AVERROR_INVALIDDATA;
2061
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 1 if (channel_config_code <= 0x8) {
2062
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 1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2063 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2064
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 1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2065 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2066 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2067 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2068
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 1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2069 } else {
2070 ✗ avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2071 }
2072 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2073 1 sti->need_context_update = 1;
2074 }
2075 }
2076
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 4 if (ext_desc_tag == SUPPLEMENTARY_AUDIO_DESCRIPTOR) {
2077 int flags;
2078
2079 ✗ if (desc_len < 1)
2080 ✗ return AVERROR_INVALIDDATA;
2081 ✗ flags = get8(pp, desc_end);
2082
2083 ✗ if ((flags & 0x80) == 0) /* mix_type */
2084 ✗ st->disposition |= AV_DISPOSITION_DEPENDENT;
2085
2086 ✗ switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2087 ✗ case 0x01:
2088 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2089 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2090 ✗ break;
2091 ✗ case 0x02:
2092 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2093 ✗ break;
2094 ✗ case 0x03:
2095 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2096 ✗ break;
2097 }
2098
2099 ✗ if (flags & 0x01) { /* language_code_present */
2100 ✗ if (desc_len < 4)
2101 ✗ return AVERROR_INVALIDDATA;
2102 ✗ language[0] = get8(pp, desc_end);
2103 ✗ language[1] = get8(pp, desc_end);
2104 ✗ language[2] = get8(pp, desc_end);
2105 ✗ language[3] = 0;
2106
2107 /* This language always has to override a possible
2108 * ISO 639 language descriptor language */
2109 ✗ if (language[0])
2110 ✗ av_dict_set(&st->metadata, "language", language, 0);
2111 }
2112 }
2113 4 break;
2114 6 case AC3_DESCRIPTOR:
2115 {
2116 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2117
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 6 if (component_type_flag) {
2118 ✗ int component_type = get8(pp, desc_end);
2119 ✗ int service_type_mask = 0x38; // 0b00111000
2120 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2121 ✗ if (service_type == 0x02 /* 0b010 */) {
2122 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2123 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2124 }
2125 }
2126 }
2127 6 break;
2128 ✗ case ENHANCED_AC3_DESCRIPTOR:
2129 {
2130 ✗ int component_type_flag = get8(pp, desc_end) & (1 << 7);
2131 ✗ if (component_type_flag) {
2132 ✗ int component_type = get8(pp, desc_end);
2133 ✗ int service_type_mask = 0x38; // 0b00111000
2134 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2135 ✗ if (service_type == 0x02 /* 0b010 */) {
2136 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2137 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2138 }
2139 }
2140 }
2141 ✗ break;
2142 ✗ case DATA_COMPONENT_DESCRIPTOR:
2143 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2144 // for captions
2145 ✗ if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2146 // This structure is defined in STD-B10, part 1, listing 5.4 and
2147 // part 2, 6.2.20).
2148 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2149 // Component tag limits are documented in TR-B14, fascicle 2,
2150 // Vol. 3, Section 2, 4.2.8.1
2151 ✗ int actual_component_tag = sti->stream_identifier - 1;
2152 ✗ int picked_profile = AV_PROFILE_UNKNOWN;
2153 ✗ int data_component_id = get16(pp, desc_end);
2154 ✗ if (data_component_id < 0)
2155 ✗ return AVERROR_INVALIDDATA;
2156
2157 ✗ switch (data_component_id) {
2158 ✗ case 0x0008:
2159 // [0x30..0x37] are component tags utilized for
2160 // non-mobile captioning service ("profile A").
2161 ✗ if (actual_component_tag >= 0x30 &&
2162 actual_component_tag <= 0x37) {
2163 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2164 }
2165 ✗ break;
2166 ✗ case 0x0012:
2167 // component tag 0x87 signifies a mobile/partial reception
2168 // (1seg) captioning service ("profile C").
2169 ✗ if (actual_component_tag == 0x87) {