FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2023-09-22 12:20:07
Exec Total Coverage
Lines: 1108 1927 57.5%
Functions: 49 70 70.0%
Branches: 605 1293 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/buffer.h"
25 #include "libavutil/common.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/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/avcodec.h"
36 #include "libavcodec/bytestream.h"
37 #include "libavcodec/defs.h"
38 #include "libavcodec/get_bits.h"
39 #include "libavcodec/opus.h"
40 #include "avformat.h"
41 #include "mpegts.h"
42 #include "internal.h"
43 #include "avio_internal.h"
44 #include "demux.h"
45 #include "mpeg.h"
46 #include "isom.h"
47 #if CONFIG_ICONV
48 #include <iconv.h>
49 #endif
50
51 /* maximum size in which we look for synchronization if
52 * synchronization is lost */
53 #define MAX_RESYNC_SIZE 65536
54
55 #define MAX_MP4_DESCR_COUNT 16
56
57 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
58 do { \
59 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
60 (modulus) = (dividend) % (divisor); \
61 (prev_dividend) = (dividend); \
62 } while (0)
63
64 #define PROBE_PACKET_MAX_BUF 8192
65 #define PROBE_PACKET_MARGIN 5
66
67 enum MpegTSFilterType {
68 MPEGTS_PES,
69 MPEGTS_SECTION,
70 MPEGTS_PCR,
71 };
72
73 typedef struct MpegTSFilter MpegTSFilter;
74
75 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
76 int is_start, int64_t pos);
77
78 typedef struct MpegTSPESFilter {
79 PESCallback *pes_cb;
80 void *opaque;
81 } MpegTSPESFilter;
82
83 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
84
85 typedef void SetServiceCallback (void *opaque, int ret);
86
87 typedef struct MpegTSSectionFilter {
88 int section_index;
89 int section_h_size;
90 int last_ver;
91 unsigned crc;
92 unsigned last_crc;
93 uint8_t *section_buf;
94 unsigned int check_crc : 1;
95 unsigned int end_of_section_reached : 1;
96 SectionCallback *section_cb;
97 void *opaque;
98 } MpegTSSectionFilter;
99
100 struct MpegTSFilter {
101 int pid;
102 int es_id;
103 int last_cc; /* last cc code (-1 if first packet) */
104 int64_t last_pcr;
105 int discard;
106 enum MpegTSFilterType type;
107 union {
108 MpegTSPESFilter pes_filter;
109 MpegTSSectionFilter section_filter;
110 } u;
111 };
112
113 struct Stream {
114 int idx;
115 int stream_identifier;
116 };
117
118 #define MAX_STREAMS_PER_PROGRAM 128
119 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
120 struct Program {
121 unsigned int id; // program id/service id
122 unsigned int nb_pids;
123 unsigned int pids[MAX_PIDS_PER_PROGRAM];
124 unsigned int nb_streams;
125 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
126
127 /** have we found pmt for this program */
128 int pmt_found;
129 };
130
131 struct MpegTSContext {
132 const AVClass *class;
133 /* user data */
134 AVFormatContext *stream;
135 /** raw packet size, including FEC if present */
136 int raw_packet_size;
137
138 int64_t pos47_full;
139
140 /** if true, all pids are analyzed to find streams */
141 int auto_guess;
142
143 /** compute exact PCR for each transport stream packet */
144 int mpeg2ts_compute_pcr;
145
146 /** fix dvb teletext pts */
147 int fix_teletext_pts;
148
149 int64_t cur_pcr; /**< used to estimate the exact PCR */
150 int64_t pcr_incr; /**< used to estimate the exact PCR */
151
152 /* data needed to handle file based ts */
153 /** stop parsing loop */
154 int stop_parse;
155 /** packet containing Audio/Video data */
156 AVPacket *pkt;
157 /** to detect seek */
158 int64_t last_pos;
159
160 int skip_changes;
161 int skip_clear;
162 int skip_unknown_pmt;
163
164 int scan_all_pmts;
165
166 int resync_size;
167 int merge_pmt_versions;
168 int max_packet_size;
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", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
188
189 static const AVOption options[] = {
190 MPEGTS_OPTIONS,
191 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
192 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
194 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
195 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
196 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
197 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
198 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
199 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
200 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
201 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
202 {.i64 = 0}, 0, 1, 0 },
203 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
204 {.i64 = 0}, 0, 1, 0 },
205 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
206 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
207 { NULL },
208 };
209
210 static const AVClass mpegts_class = {
211 .class_name = "mpegts demuxer",
212 .item_name = av_default_item_name,
213 .option = options,
214 .version = LIBAVUTIL_VERSION_INT,
215 };
216
217 static const AVOption raw_options[] = {
218 MPEGTS_OPTIONS,
219 { "compute_pcr", "compute exact PCR for each transport stream packet",
220 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
221 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
222 { "ts_packetsize", "output option carrying the raw packet size",
223 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
224 { .i64 = 0 }, 0, 0,
225 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
226 { NULL },
227 };
228
229 static const AVClass mpegtsraw_class = {
230 .class_name = "mpegtsraw demuxer",
231 .item_name = av_default_item_name,
232 .option = raw_options,
233 .version = LIBAVUTIL_VERSION_INT,
234 };
235
236 /* TS stream handling */
237
238 enum MpegTSState {
239 MPEGTS_HEADER = 0,
240 MPEGTS_PESHEADER,
241 MPEGTS_PESHEADER_FILL,
242 MPEGTS_PAYLOAD,
243 MPEGTS_SKIP,
244 };
245
246 /* enough for PES header + length */
247 #define PES_START_SIZE 6
248 #define PES_HEADER_SIZE 9
249 #define MAX_PES_HEADER_SIZE (9 + 255)
250
251 typedef struct PESContext {
252 int pid;
253 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
254 int stream_type;
255 MpegTSContext *ts;
256 AVFormatContext *stream;
257 AVStream *st;
258 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
259 enum MpegTSState state;
260 /* used to get the format */
261 int data_index;
262 int flags; /**< copied to the AVPacket flags */
263 int PES_packet_length;
264 int pes_header_size;
265 int extended_stream_id;
266 uint8_t stream_id;
267 int64_t pts, dts;
268 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
269 uint8_t header[MAX_PES_HEADER_SIZE];
270 AVBufferRef *buffer;
271 SLConfigDescr sl;
272 int merged_st;
273 } PESContext;
274
275 extern const AVInputFormat ff_mpegts_demuxer;
276
277 473 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
278 {
279 int i;
280
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 473 for (i = 0; i < ts->nb_prg; i++) {
281
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 419 if (ts->prg[i].id == programid) {
282 419 return &ts->prg[i];
283 }
284 }
285 54 return NULL;
286 }
287
288 169 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
289 {
290 169 AVProgram *prg = NULL;
291 int i;
292
293
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 169 for (i = 0; i < ts->stream->nb_programs; i++)
294
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 169 if (ts->stream->programs[i]->id == programid) {
295 169 prg = ts->stream->programs[i];
296 169 break;
297 }
298
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 169 if (!prg)
299 ✗ return;
300 169 prg->nb_stream_indexes = 0;
301 }
302
303 317 static void clear_program(struct Program *p)
304 {
305
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 317 if (!p)
306 ✗ return;
307 317 p->nb_pids = 0;
308 317 p->nb_streams = 0;
309 317 p->pmt_found = 0;
310 }
311
312 54 static void clear_programs(MpegTSContext *ts)
313 {
314 54 av_freep(&ts->prg);
315 54 ts->nb_prg = 0;
316 54 }
317
318 210 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
319 {
320 210 struct Program *p = get_program(ts, programid);
321
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 210 if (p)
322 156 return p;
323
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 54 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
324 ✗ ts->nb_prg = 0;
325 ✗ return NULL;
326 }
327 54 p = &ts->prg[ts->nb_prg];
328 54 p->id = programid;
329 54 clear_program(p);
330 54 ts->nb_prg++;
331 54 return p;
332 }
333
334 1255 static void add_pid_to_program(struct Program *p, unsigned int pid)
335 {
336 int i;
337
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 1255 if (!p)
338 ✗ return;
339
340
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 1255 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
341 ✗ return;
342
343
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 2451 for (i = 0; i < p->nb_pids; i++)
344
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 1621 if (p->pids[i] == pid)
345 425 return;
346
347 830 p->pids[p->nb_pids++] = pid;
348 }
349
350 263 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
351 unsigned int pid, int version)
352 {
353 int i;
354
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 263 for (i = 0; i < s->nb_programs; i++) {
355 263 AVProgram *program = s->programs[i];
356
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 263 if (program->id == programid) {
357 263 int old_pcr_pid = program->pcr_pid,
358 263 old_version = program->pmt_version;
359 263 program->pcr_pid = pid;
360 263 program->pmt_version = version;
361
362
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 263 if (old_version != -1 && old_version != version) {
363 13 av_log(s, AV_LOG_VERBOSE,
364 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
365 programid, old_version, version, old_pcr_pid, pid);
366 }
367 263 break;
368 }
369 }
370 263 }
371
372 /**
373 * @brief discard_pid() decides if the pid is to be discarded according
374 * to caller's programs selection
375 * @param ts : - TS context
376 * @param pid : - pid
377 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
378 * 0 otherwise
379 */
380 36047 static int discard_pid(MpegTSContext *ts, unsigned int pid)
381 {
382 int i, j, k;
383 36047 int used = 0, discarded = 0;
384 struct Program *p;
385
386
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 36047 if (pid == PAT_PID)
387 3007 return 0;
388
389 /* If none of the programs have .discard=AVDISCARD_ALL then there's
390 * no way we have to discard this packet */
391
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 66053 for (k = 0; k < ts->stream->nb_programs; k++)
392
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 33013 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
393 ✗ break;
394
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 33040 if (k == ts->stream->nb_programs)
395 33040 return 0;
396
397 ✗ for (i = 0; i < ts->nb_prg; i++) {
398 ✗ p = &ts->prg[i];
399 ✗ for (j = 0; j < p->nb_pids; j++) {
400 ✗ if (p->pids[j] != pid)
401 ✗ continue;
402 // is program with id p->id set to be discarded?
403 ✗ for (k = 0; k < ts->stream->nb_programs; k++) {
404 ✗ if (ts->stream->programs[k]->id == p->id) {
405 ✗ if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
406 ✗ discarded++;
407 else
408 ✗ used++;
409 }
410 }
411 }
412 }
413
414 ✗ return !used && discarded;
415 }
416
417 /**
418 * Assemble PES packets out of TS packets, and then call the "section_cb"
419 * function when they are complete.
420 */
421 6472 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
422 const uint8_t *buf, int buf_size, int is_start)
423 {
424 6472 MpegTSSectionFilter *tss = &tss1->u.section_filter;
425 6472 uint8_t *cur_section_buf = NULL;
426 int len, offset;
427
428
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 6472 if (is_start) {
429 6437 memcpy(tss->section_buf, buf, buf_size);
430 6437 tss->section_index = buf_size;
431 6437 tss->section_h_size = -1;
432 6437 tss->end_of_section_reached = 0;
433 } else {
434
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 35 if (tss->end_of_section_reached)
435 ✗ return;
436 35 len = MAX_SECTION_SIZE - tss->section_index;
437
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 35 if (buf_size < len)
438 35 len = buf_size;
439 35 memcpy(tss->section_buf + tss->section_index, buf, len);
440 35 tss->section_index += len;
441 }
442
443 6472 offset = 0;
444 6472 cur_section_buf = tss->section_buf;
445
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 12909 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
446 /* compute section length if possible */
447
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 6680 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
448 6472 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
449
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 6472 if (len > MAX_SECTION_SIZE)
450 ✗ return;
451 6472 tss->section_h_size = len;
452 }
453
454
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 6680 if (tss->section_h_size != -1 &&
455
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 6472 tss->section_index >= offset + tss->section_h_size) {
456 6437 int crc_valid = 1;
457 6437 tss->end_of_section_reached = 1;
458
459
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 6437 if (tss->check_crc) {
460 6437 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
461
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 6437 if (tss->section_h_size >= 4)
462 6437 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
463
464
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 6437 if (crc_valid) {
465 6437 ts->crc_validity[ tss1->pid ] = 100;
466 ✗ }else if (ts->crc_validity[ tss1->pid ] > -10) {
467 ✗ ts->crc_validity[ tss1->pid ]--;
468 }else
469 ✗ crc_valid = 2;
470 }
471
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 6437 if (crc_valid) {
472 6437 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
473
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 6437 if (crc_valid != 1)
474 ✗ tss->last_ver = -1;
475 }
476
477 6437 cur_section_buf += tss->section_h_size;
478 6437 offset += tss->section_h_size;
479 6437 tss->section_h_size = -1;
480 } else {
481 243 tss->section_h_size = -1;
482 243 tss->end_of_section_reached = 0;
483 243 break;
484 }
485 }
486 }
487
488 339 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
489 enum MpegTSFilterType type)
490 {
491 MpegTSFilter *filter;
492
493 339 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
494
495
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 339 if (pid >= NB_PID_MAX || ts->pids[pid])
496 ✗ return NULL;
497 339 filter = av_mallocz(sizeof(MpegTSFilter));
498
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 339 if (!filter)
499 ✗ return NULL;
500 339 ts->pids[pid] = filter;
501
502 339 filter->type = type;
503 339 filter->pid = pid;
504 339 filter->es_id = -1;
505 339 filter->last_cc = -1;
506 339 filter->last_pcr= -1;
507
508 339 return filter;
509 }
510
511 221 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
512 unsigned int pid,
513 SectionCallback *section_cb,
514 void *opaque,
515 int check_crc)
516 {
517 MpegTSFilter *filter;
518 MpegTSSectionFilter *sec;
519 221 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
520
521
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 221 if (!section_buf)
522 ✗ return NULL;
523
524
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 221 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
525 ✗ av_free(section_buf);
526 ✗ return NULL;
527 }
528 221 sec = &filter->u.section_filter;
529 221 sec->section_cb = section_cb;
530 221 sec->opaque = opaque;
531 221 sec->section_buf = section_buf;
532 221 sec->check_crc = check_crc;
533 221 sec->last_ver = -1;
534
535 221 return filter;
536 }
537
538 118 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
539 PESCallback *pes_cb,
540 void *opaque)
541 {
542 MpegTSFilter *filter;
543 MpegTSPESFilter *pes;
544
545
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 118 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
546 ✗ return NULL;
547
548 118 pes = &filter->u.pes_filter;
549 118 pes->pes_cb = pes_cb;
550 118 pes->opaque = opaque;
551 118 return filter;
552 }
553
554 ✗ static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
555 {
556 ✗ return mpegts_open_filter(ts, pid, MPEGTS_PCR);
557 }
558
559 339 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
560 {
561 int pid;
562
563 339 pid = filter->pid;
564
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 339 if (filter->type == MPEGTS_SECTION)
565 221 av_freep(&filter->u.section_filter.section_buf);
566
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 118 else if (filter->type == MPEGTS_PES) {
567 118 PESContext *pes = filter->u.pes_filter.opaque;
568 118 av_buffer_unref(&pes->buffer);
569 /* referenced private data will be freed later in
570 * avformat_close_input (pes->st->priv_data == pes) */
571
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 118 if (!pes->st || pes->merged_st) {
572 21 av_freep(&filter->u.pes_filter.opaque);
573 }
574 }
575
576 339 av_free(filter);
577 339 ts->pids[pid] = NULL;
578 339 }
579
580 36417 static int analyze(const uint8_t *buf, int size, int packet_size,
581 int probe)
582 {
583 int stat[TS_MAX_PACKET_SIZE];
584 36417 int stat_all = 0;
585 int i;
586 36417 int best_score = 0;
587
588 36417 memset(stat, 0, packet_size * sizeof(*stat));
589
590
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 410211022 for (i = 0; i < size - 3; i++) {
591
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 410174605 if (buf[i] == 0x47) {
592 758342 int pid = AV_RB16(buf+1) & 0x1FFF;
593 758342 int asc = buf[i + 3] & 0x30;
594
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 758342 if (!probe || pid == 0x1FFF || asc) {
595 611316 int x = i % packet_size;
596 611316 stat[x]++;
597 611316 stat_all++;
598
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 611316 if (stat[x] > best_score) {
599 57654 best_score = stat[x];
600 }
601 }
602 }
603 }
604
605 36417 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
606 }
607
608 /* autodetect fec presence */
609 112 static int get_packet_size(AVFormatContext* s)
610 {
611 int score, fec_score, dvhs_score;
612 int margin;
613 int ret;
614
615 /*init buffer to store stream for probing */
616 112 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
617 112 int buf_size = 0;
618 112 int max_iterations = 16;
619
620
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 112 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
621 112 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
622
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 112 if (ret < 0)
623 ✗ return AVERROR_INVALIDDATA;
624 112 buf_size += ret;
625
626 112 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
627 112 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
628 112 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
629 112 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
630 buf_size, score, dvhs_score, fec_score);
631
632 112 margin = mid_pred(score, fec_score, dvhs_score);
633
634
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 112 if (buf_size < PROBE_PACKET_MAX_BUF)
635 1 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
636
637
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 112 if (score > margin)
638 112 return TS_PACKET_SIZE;
639 ✗ else if (dvhs_score > margin)
640 ✗ return TS_DVHS_PACKET_SIZE;
641 ✗ else if (fec_score > margin)
642 ✗ return TS_FEC_PACKET_SIZE;
643 }
644 ✗ return AVERROR_INVALIDDATA;
645 }
646
647 typedef struct SectionHeader {
648 uint8_t tid;
649 uint16_t id;
650 uint8_t version;
651 uint8_t current_next;
652 uint8_t sec_num;
653 uint8_t last_sec_num;
654 } SectionHeader;
655
656 5790 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
657 {
658
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 5790 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
659 5217 return 1;
660
661 573 tssf->last_ver = h->version;
662 573 tssf->last_crc = tssf->crc;
663
664 573 return 0;
665 }
666
667 30894 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
668 {
669 const uint8_t *p;
670 int c;
671
672 30894 p = *pp;
673
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 30894 if (p >= p_end)
674 1373 return AVERROR_INVALIDDATA;
675 29521 c = *p++;
676 29521 *pp = p;
677 29521 return c;
678 }
679
680 9552 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
681 {
682 const uint8_t *p;
683 int c;
684
685 9552 p = *pp;
686
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 9552 if (1 >= p_end - p)
687 310 return AVERROR_INVALIDDATA;
688 9242 c = AV_RB16(p);
689 9242 p += 2;
690 9242 *pp = p;
691 9242 return c;
692 }
693
694 /* read and allocate a DVB string preceded by its length */
695 200 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
696 {
697 int len;
698 const uint8_t *p;
699 char *str;
700
701 200 p = *pp;
702 200 len = get8(&p, p_end);
703
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 200 if (len < 0)
704 ✗ return NULL;
705
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 200 if (len > p_end - p)
706 ✗ return NULL;
707 #if CONFIG_ICONV
708
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 200 if (len) {
709 200 const char *encodings[] = {
710 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
711 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
712 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
713 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
714 "", "", "", "", "", "", "", ""
715 };
716 iconv_t cd;
717 char *in, *out;
718 200 size_t inlen = len, outlen = inlen * 6 + 1;
719
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 200 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
720 char iso8859[12];
721 ✗ snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
722 ✗ inlen -= 3;
723 ✗ in = (char *)p + 3;
724 ✗ cd = iconv_open("UTF-8", iso8859);
725
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 200 } else if (p[0] < 0x20) {
726 8 inlen -= 1;
727 8 in = (char *)p + 1;
728 8 cd = iconv_open("UTF-8", encodings[*p]);
729 } else {
730 192 in = (char *)p;
731 192 cd = iconv_open("UTF-8", encodings[0]);
732 }
733
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 200 if (cd == (iconv_t)-1)
734 ✗ goto no_iconv;
735 200 str = out = av_malloc(outlen);
736
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 200 if (!str) {
737 ✗ iconv_close(cd);
738 200 return NULL;
739 }
740
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 200 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
741 ✗ iconv_close(cd);
742 ✗ av_freep(&str);
743 ✗ goto no_iconv;
744 }
745 200 iconv_close(cd);
746 200 *out = 0;
747 200 *pp = p + len;
748 200 return str;
749 }
750 ✗ no_iconv:
751 #endif
752 ✗ str = av_malloc(len + 1);
753 ✗ if (!str)
754 ✗ return NULL;
755 ✗ memcpy(str, p, len);
756 ✗ str[len] = '\0';
757 ✗ p += len;
758 ✗ *pp = p;
759 ✗ return str;
760 }
761
762 6435 static int parse_section_header(SectionHeader *h,
763 const uint8_t **pp, const uint8_t *p_end)
764 {
765 int val;
766
767 6435 val = get8(pp, p_end);
768
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 6435 if (val < 0)
769 ✗ return val;
770 6435 h->tid = val;
771 6435 *pp += 2;
772 6435 val = get16(pp, p_end);
773
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 6435 if (val < 0)
774 ✗ return val;
775 6435 h->id = val;
776 6435 val = get8(pp, p_end);
777
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 6435 if (val < 0)
778 ✗ return val;
779 6435 h->version = (val >> 1) & 0x1f;
780 6435 h->current_next = val & 0x01;
781 6435 val = get8(pp, p_end);
782
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 6435 if (val < 0)
783 ✗ return val;
784 6435 h->sec_num = val;
785 6435 val = get8(pp, p_end);
786
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 6435 if (val < 0)
787 ✗ return val;
788 6435 h->last_sec_num = val;
789 6435 return 0;
790 }
791
792 typedef struct StreamType {
793 uint32_t stream_type;
794 enum AVMediaType codec_type;
795 enum AVCodecID codec_id;
796 } StreamType;
797
798 static const StreamType ISO_types[] = {
799 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
800 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
801 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
802 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
803 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
804 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
805 /* Makito encoder sets stream type 0x11 for AAC,
806 * so auto-detect LOAS/LATM instead of hardcoding it. */
807 #if !CONFIG_LOAS_DEMUXER
808 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
809 #endif
810 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
811 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
812 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
813 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
814 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
815 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
816 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
817 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
818 { 0xd4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
819 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
820 { 0 },
821 };
822
823 static const StreamType HDMV_types[] = {
824 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
825 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
826 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
827 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
828 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
829 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
830 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
831 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
832 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
833 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
834 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
835 { 0 },
836 };
837
838 /* SCTE types */
839 static const StreamType SCTE_types[] = {
840 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
841 { 0 },
842 };
843
844 /* ATSC ? */
845 static const StreamType MISC_types[] = {
846 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
847 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
848 { 0 },
849 };
850
851 /* HLS Sample Encryption Types */
852 static const StreamType HLS_SAMPLE_ENC_types[] = {
853 { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
854 { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
855 { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
856 { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
857 { 0 },
858 };
859
860 static const StreamType REGD_types[] = {
861 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
862 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
863 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
864 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
865 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
866 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
867 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
868 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
869 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
870 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
871 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
872 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
873 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
874 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
875 { 0 },
876 };
877
878 static const StreamType METADATA_types[] = {
879 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
880 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
881 { 0 },
882 };
883
884 /* descriptor present */
885 static const StreamType DESC_types[] = {
886 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
887 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
888 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
889 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
890 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
891 { 0 },
892 };
893
894 149 static void mpegts_find_stream_type(AVStream *st,
895 uint32_t stream_type,
896 const StreamType *types)
897 {
898 149 FFStream *const sti = ffstream(st);
899
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 803 for (; types->stream_type; types++)
900
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 756 if (stream_type == types->stream_type) {
901
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 102 if (st->codecpar->codec_type != types->codec_type ||
902
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 8 st->codecpar->codec_id != types->codec_id) {
903 101 st->codecpar->codec_type = types->codec_type;
904 101 st->codecpar->codec_id = types->codec_id;
905 101 sti->need_context_update = 1;
906 }
907 102 sti->request_probe = 0;
908 102 return;
909 }
910 }
911
912 97 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
913 uint32_t stream_type, uint32_t prog_reg_desc)
914 {
915 97 FFStream *const sti = ffstream(st);
916 97 int old_codec_type = st->codecpar->codec_type;
917 97 int old_codec_id = st->codecpar->codec_id;
918 97 int old_codec_tag = st->codecpar->codec_tag;
919
920
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 97 if (avcodec_is_open(sti->avctx)) {
921 ✗ av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, internal codec is open\n");
922 ✗ return 0;
923 }
924
925 97 avpriv_set_pts_info(st, 33, 1, 90000);
926 97 st->priv_data = pes;
927 97 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
928 97 st->codecpar->codec_id = AV_CODEC_ID_NONE;
929 97 sti->need_parsing = AVSTREAM_PARSE_FULL;
930 97 pes->st = st;
931 97 pes->stream_type = stream_type;
932
933 97 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 97 st->codecpar->codec_tag = pes->stream_type;
938
939 97 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
940
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 97 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
941 7 sti->request_probe = 50;
942
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 97 if ((prog_reg_desc == AV_RL32("HDMV") ||
943
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 97 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 == 0x83) {
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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 97 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
971 23 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
972
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 97 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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 97 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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 97 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
979
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 89 (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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 97 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 97 sti->need_context_update = 1;
992
993 97 return 0;
994 }
995
996 55672 static void reset_pes_packet_state(PESContext *pes)
997 {
998 55672 pes->pts = AV_NOPTS_VALUE;
999 55672 pes->dts = AV_NOPTS_VALUE;
1000 55672 pes->data_index = 0;
1001 55672 pes->flags = 0;
1002 55672 av_buffer_unref(&pes->buffer);
1003 55672 }
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 28912 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1013 {
1014 uint8_t *sd;
1015
1016 28912 av_packet_unref(pkt);
1017
1018 28912 pkt->buf = pes->buffer;
1019 28912 pkt->data = pes->buffer->data;
1020 28912 pkt->size = pes->data_index;
1021
1022
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 28912 if (pes->PES_packet_length &&
1023
2/2
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 26006 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1024 PES_START_SIZE) {
1025 83 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1026 83 pes->flags |= AV_PKT_FLAG_CORRUPT;
1027 }
1028 28912 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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 28912 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1032 ✗ pkt->stream_index = pes->sub_st->index;
1033 else
1034 28912 pkt->stream_index = pes->st->index;
1035 28912 pkt->pts = pes->pts;
1036 28912 pkt->dts = pes->dts;
1037 /* store position of first TS packet of this PES packet */
1038 28912 pkt->pos = pes->ts_packet_pos;
1039 28912 pkt->flags = pes->flags;
1040
1041 28912 pes->buffer = NULL;
1042 28912 reset_pes_packet_state(pes);
1043
1044 28912 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1045
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 28912 if (!sd)
1046 ✗ return AVERROR(ENOMEM);
1047 28912 *sd = pes->stream_id;
1048
1049 28912 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 29008 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1131 {
1132 29008 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1133
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 29008 if (!ts->pools[index]) {
1134
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 154 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1135 154 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1136
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 154 if (!ts->pools[index])
1137 ✗ return NULL;
1138 }
1139 29008 return av_buffer_pool_get(ts->pools[index]);
1140 }
1141
1142 /* return non zero if a packet could be constructed */
1143 365066 static int mpegts_push_data(MpegTSFilter *filter,
1144 const uint8_t *buf, int buf_size, int is_start,
1145 int64_t pos)
1146 {
1147 365066 PESContext *pes = filter->u.pes_filter.opaque;
1148 365066 MpegTSContext *ts = pes->ts;
1149 const uint8_t *p;
1150 int ret, len;
1151
1152
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 365066 if (!ts->pkt)
1153 ✗ return 0;
1154
1155
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 365066 if (is_start) {
1156
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 29598 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1157 2838 ret = new_pes_packet(pes, ts->pkt);
1158
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 2838 if (ret < 0)
1159 ✗ return ret;
1160 2838 ts->stop_parse = 1;
1161 } else {
1162 26760 reset_pes_packet_state(pes);
1163 }
1164 29598 pes->state = MPEGTS_HEADER;
1165 29598 pes->ts_packet_pos = pos;
1166 }
1167 365066 p = buf;
1168
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 1182810 while (buf_size > 0) {
1169
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 452678 switch (pes->state) {
1170 29598 case MPEGTS_HEADER:
1171 29598 len = PES_START_SIZE - pes->data_index;
1172
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 29598 if (len > buf_size)
1173 2 len = buf_size;
1174 29598 memcpy(pes->header + pes->data_index, p, len);
1175 29598 pes->data_index += len;
1176 29598 p += len;
1177 29598 buf_size -= len;
1178
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 29598 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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 29596 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1182
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 29589 pes->header[2] == 0x01) {
1183 /* it must be an MPEG-2 PES stream */
1184 29589 pes->stream_id = pes->header[3];
1185 29589 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1186
1187
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 29589 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1188
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 581 (!pes->sub_st ||
1189 ✗ pes->sub_st->discard == AVDISCARD_ALL)) ||
1190
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 29008 pes->stream_id == STREAM_ID_PADDING_STREAM)
1191 581 goto skip;
1192
1193 /* stream not present in PMT */
1194
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 29008 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 29008 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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 29008 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1211
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 29008 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1212
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 29008 pes->stream_id != STREAM_ID_ECM_STREAM &&
1213
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 29008 pes->stream_id != STREAM_ID_EMM_STREAM &&
1214
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 29008 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1215
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 29008 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1216
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 58016 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1217 29008 FFStream *const pes_sti = ffstream(pes->st);
1218 29008 pes->state = MPEGTS_PESHEADER;
1219
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 29008 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 588 pes->state = MPEGTS_SKIP;
1236 588 continue;
1237 }
1238 }
1239 29010 break;
1240 /**********************************************/
1241 /* PES packing parsing */
1242 29008 case MPEGTS_PESHEADER:
1243 29008 len = PES_HEADER_SIZE - pes->data_index;
1244
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 29008 if (len < 0)
1245 ✗ return AVERROR_INVALIDDATA;
1246
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 29008 if (len > buf_size)
1247 ✗ len = buf_size;
1248 29008 memcpy(pes->header + pes->data_index, p, len);
1249 29008 pes->data_index += len;
1250 29008 p += len;
1251 29008 buf_size -= len;
1252
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 29008 if (pes->data_index == PES_HEADER_SIZE) {
1253 29008 pes->pes_header_size = pes->header[8] + 9;
1254 29008 pes->state = MPEGTS_PESHEADER_FILL;
1255 }
1256 29008 break;
1257 29008 case MPEGTS_PESHEADER_FILL:
1258 29008 len = pes->pes_header_size - pes->data_index;
1259
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 29008 if (len < 0)
1260 ✗ return AVERROR_INVALIDDATA;
1261
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 29008 if (len > buf_size)
1262 ✗ len = buf_size;
1263 29008 memcpy(pes->header + pes->data_index, p, len);
1264 29008 pes->data_index += len;
1265 29008 p += len;
1266 29008 buf_size -= len;
1267
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 29008 if (pes->data_index == pes->pes_header_size) {
1268 const uint8_t *r;
1269 unsigned int flags, pes_ext, skip;
1270
1271 29008 flags = pes->header[7];
1272 29008 r = pes->header + 9;
1273 29008 pes->pts = AV_NOPTS_VALUE;
1274 29008 pes->dts = AV_NOPTS_VALUE;
1275
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 29008 if ((flags & 0xc0) == 0x80) {
1276 10419 pes->dts = pes->pts = ff_parse_pes_pts(r);
1277 10419 r += 5;
1278
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 18589 } else if ((flags & 0xc0) == 0xc0) {
1279 1840 pes->pts = ff_parse_pes_pts(r);
1280 1840 r += 5;
1281 1840 pes->dts = ff_parse_pes_pts(r);
1282 1840 r += 5;
1283 }
1284 29008 pes->extended_stream_id = -1;
1285
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 29008 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 29008 pes->state = MPEGTS_PAYLOAD;
1301 29008 pes->data_index = 0;
1302
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 29008 if (pes->stream_type == 0x12 && 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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 29008 if (pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV && buf_size >= 5) {
1310 /* skip metadata access unit header */
1311 ✗ pes->pes_header_size += 5;
1312 ✗ p += 5;
1313 ✗ buf_size -= 5;
1314 }
1315
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✗ Branch 1 not taken.
 29008 if ( pes->ts->fix_teletext_pts
1316
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✗ Branch 1 not taken.
 29008 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1317
2/2
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✓ Branch 1 taken 28754 times.
 29008 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1318 ) {
1319 254 AVProgram *p = NULL;
1320 254 int pcr_found = 0;
1321
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✓ Branch 2 taken 254 times.
 508 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1322
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 254 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1323 254 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1324
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 254 if (f) {
1325 254 AVStream *st = NULL;
1326
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 254 if (f->type == MPEGTS_PES) {
1327 254 PESContext *pcrpes = f->u.pes_filter.opaque;
1328
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✗ Branch 1 not taken.
 254 if (pcrpes)
1329 254 st = pcrpes->st;
1330 ✗ } else if (f->type == MPEGTS_PCR) {
1331 int i;
1332 ✗ for (i = 0; i < p->nb_stream_indexes; i++) {
1333 ✗ AVStream *pst = pes->stream->streams[p->stream_index[i]];
1334 ✗ if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1335 ✗ st = pst;
1336 }
1337 }
1338
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 254 if (f->last_pcr != -1 && !f->discard) {
1339 // teletext packets do not always have correct timestamps,
1340 // the standard says they should be handled after 40.6 ms at most,
1341 // and the pcr error to this packet should be no more than 100 ms.
1342 // TODO: we should interpolate the PCR, not just use the last one
1343 ✗ int64_t pcr = f->last_pcr / 300;
1344 ✗ pcr_found = 1;
1345 ✗ if (st) {
1346 ✗ const FFStream *const sti = ffstream(st);
1347 ✗ FFStream *const pes_sti = ffstream(pes->st);
1348
1349 ✗ pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1350 ✗ pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1351 }
1352 ✗ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1353 ✗ pes->pts = pes->dts = pcr;
1354 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1355 ✗ pes->dts > pcr + 3654 + 9000) {
1356 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1357 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1358 ✗ pes->dts > pcr + 10*90000) { //10sec
1359 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1360 }
1361 ✗ break;
1362 }
1363 }
1364 }
1365 }
1366
1367
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 254 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1368 !pcr_found) {
1369 ✗ av_log(pes->stream, AV_LOG_VERBOSE,
1370 "Forcing DTS/PTS to be unset for a "
1371 "non-trustworthy PES packet for PID %d as "
1372 "PCR hasn't been received yet.\n",
1373 pes->pid);
1374 ✗ pes->dts = pes->pts = AV_NOPTS_VALUE;
1375 }
1376 }
1377 }
1378 29008 break;
1379 349256 case MPEGTS_PAYLOAD:
1380 do {
1381 349256 int max_packet_size = ts->max_packet_size;
1382
3/4
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 349256 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1383 193196 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1384
1385
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 349256 if (pes->data_index > 0 &&
1386
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 320248 pes->data_index + buf_size > max_packet_size) {
1387 ✗ ret = new_pes_packet(pes, ts->pkt);
1388 ✗ if (ret < 0)
1389 ✗ return ret;
1390 ✗ pes->PES_packet_length = 0;
1391 ✗ max_packet_size = ts->max_packet_size;
1392 ✗ ts->stop_parse = 1;
1393
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 349256 } else if (pes->data_index == 0 &&
1394 buf_size > max_packet_size) {
1395 // pes packet size is < ts size packet and pes data is padded with 0xff
1396 // not sure if this is legal in ts but see issue #2392
1397 ✗ buf_size = max_packet_size;
1398 }
1399
1400
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 349256 if (!pes->buffer) {
1401 29008 pes->buffer = buffer_pool_get(ts, max_packet_size);
1402
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 29008 if (!pes->buffer)
1403 ✗ return AVERROR(ENOMEM);
1404 }
1405
1406 349256 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1407 349256 pes->data_index += buf_size;
1408 /* emit complete packets with known packet size
1409 * decreases demuxer delay for infrequent packets like subtitles from
1410 * a couple of seconds to milliseconds for properly muxed files. */
1411
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 349256 if (!ts->stop_parse && pes->PES_packet_length &&
1412
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 193196 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1413 25923 ts->stop_parse = 1;
1414 25923 ret = new_pes_packet(pes, ts->pkt);
1415 25923 pes->state = MPEGTS_SKIP;
1416
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 25923 if (ret < 0)
1417 ✗ return ret;
1418 }
1419 } while (0);
1420 349256 buf_size = 0;
1421 349256 break;
1422 15808 case MPEGTS_SKIP:
1423 15808 buf_size = 0;
1424 15808 break;
1425 }
1426 }
1427
1428 365066 return 0;
1429 }
1430
1431 118 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1432 {
1433 MpegTSFilter *tss;
1434 PESContext *pes;
1435
1436 /* if no pid found, then add a pid context */
1437 118 pes = av_mallocz(sizeof(PESContext));
1438
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 118 if (!pes)
1439 ✗ return 0;
1440 118 pes->ts = ts;
1441 118 pes->stream = ts->stream;
1442 118 pes->pid = pid;
1443 118 pes->pcr_pid = pcr_pid;
1444 118 pes->state = MPEGTS_SKIP;
1445 118 pes->pts = AV_NOPTS_VALUE;
1446 118 pes->dts = AV_NOPTS_VALUE;
1447 118 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1448
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 118 if (!tss) {
1449 ✗ av_free(pes);
1450 ✗ return 0;
1451 }
1452 118 return pes;
1453 }
1454
1455 #define MAX_LEVEL 4
1456 typedef struct MP4DescrParseContext {
1457 AVFormatContext *s;
1458 FFIOContext pb;
1459 Mp4Descr *descr;
1460 Mp4Descr *active_descr;
1461 int descr_count;
1462 int max_descr_count;
1463 int level;
1464 int predefined_SLConfigDescriptor_seen;
1465 } MP4DescrParseContext;
1466
1467 ✗ static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1468 const uint8_t *buf, unsigned size,
1469 Mp4Descr *descr, int max_descr_count)
1470 {
1471 ✗ if (size > (1 << 30))
1472 ✗ return AVERROR_INVALIDDATA;
1473
1474 ✗ ffio_init_read_context(&d->pb, buf, size);
1475
1476 ✗ d->s = s;
1477 ✗ d->level = 0;
1478 ✗ d->descr_count = 0;
1479 ✗ d->descr = descr;
1480 ✗ d->active_descr = NULL;
1481 ✗ d->max_descr_count = max_descr_count;
1482
1483 ✗ return 0;
1484 }
1485
1486 ✗ static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1487 {
1488 ✗ int64_t new_off = avio_tell(pb);
1489 ✗ (*len) -= new_off - *off;
1490 ✗ *off = new_off;
1491 ✗ }
1492
1493 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1494 int target_tag);
1495
1496 ✗ static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1497 {
1498 ✗ while (len > 0) {
1499 ✗ int ret = parse_mp4_descr(d, off, len, 0);
1500 ✗ if (ret < 0)
1501 ✗ return ret;
1502 ✗ update_offsets(&d->pb.pub, &off, &len);
1503 }
1504 ✗ return 0;
1505 }
1506
1507 ✗ static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1508 {
1509 ✗ AVIOContext *const pb = &d->pb.pub;
1510 ✗ avio_rb16(pb); // ID
1511 ✗ avio_r8(pb);
1512 ✗ avio_r8(pb);
1513 ✗ avio_r8(pb);
1514 ✗ avio_r8(pb);
1515 ✗ avio_r8(pb);
1516 ✗ update_offsets(pb, &off, &len);
1517 ✗ return parse_mp4_descr_arr(d, off, len);
1518 }
1519
1520 ✗ static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1521 {
1522 int id_flags;
1523 ✗ if (len < 2)
1524 ✗ return 0;
1525 ✗ id_flags = avio_rb16(&d->pb.pub);
1526 ✗ if (!(id_flags & 0x0020)) { // URL_Flag
1527 ✗ update_offsets(&d->pb.pub, &off, &len);
1528 ✗ return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1529 } else {
1530 ✗ return 0;
1531 }
1532 }
1533
1534 ✗ static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1535 {
1536 ✗ AVIOContext *const pb = &d->pb.pub;
1537 ✗ int es_id = 0;
1538 ✗ int ret = 0;
1539
1540 ✗ if (d->descr_count >= d->max_descr_count)
1541 ✗ return AVERROR_INVALIDDATA;
1542 ✗ ff_mp4_parse_es_descr(pb, &es_id);
1543 ✗ d->active_descr = d->descr + (d->descr_count++);
1544
1545 ✗ d->active_descr->es_id = es_id;
1546 ✗ update_offsets(pb, &off, &len);
1547 ✗ if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1548 ✗ return ret;
1549 ✗ update_offsets(pb, &off, &len);
1550 ✗ if (len > 0)
1551 ✗ ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1552 ✗ d->active_descr = NULL;
1553 ✗ return ret;
1554 }
1555
1556 ✗ static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1557 int len)
1558 {
1559 ✗ Mp4Descr *descr = d->active_descr;
1560 ✗ if (!descr)
1561 ✗ return AVERROR_INVALIDDATA;
1562 ✗ d->active_descr->dec_config_descr = av_malloc(len);
1563 ✗ if (!descr->dec_config_descr)
1564 ✗ return AVERROR(ENOMEM);
1565 ✗ descr->dec_config_descr_len = len;
1566 ✗ avio_read(&d->pb.pub, descr->dec_config_descr, len);
1567 ✗ return 0;
1568 }
1569
1570 ✗ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1571 {
1572 ✗ Mp4Descr *descr = d->active_descr;
1573 ✗ AVIOContext *const pb = &d->pb.pub;
1574 int predefined;
1575 ✗ if (!descr)
1576 ✗ return AVERROR_INVALIDDATA;
1577
1578 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1579 descr->sl.dst = avio_r8(pb); \
1580 if (descr->sl.dst > maxv) { \
1581 descr->sl.dst = maxv; \
1582 return AVERROR_INVALIDDATA; \
1583 } \
1584 } while (0)
1585
1586 ✗ predefined = avio_r8(pb);
1587 ✗ if (!predefined) {
1588 int lengths;
1589 ✗ int flags = avio_r8(pb);
1590 ✗ descr->sl.use_au_start = !!(flags & 0x80);
1591 ✗ descr->sl.use_au_end = !!(flags & 0x40);
1592 ✗ descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1593 ✗ descr->sl.use_padding = !!(flags & 0x08);
1594 ✗ descr->sl.use_timestamps = !!(flags & 0x04);
1595 ✗ descr->sl.use_idle = !!(flags & 0x02);
1596 ✗ descr->sl.timestamp_res = avio_rb32(pb);
1597 ✗ avio_rb32(pb);
1598 ✗ R8_CHECK_CLIP_MAX(timestamp_len, 63);
1599 ✗ R8_CHECK_CLIP_MAX(ocr_len, 63);
1600 ✗ R8_CHECK_CLIP_MAX(au_len, 31);
1601 ✗ descr->sl.inst_bitrate_len = avio_r8(pb);
1602 ✗ lengths = avio_rb16(pb);
1603 ✗ descr->sl.degr_prior_len = lengths >> 12;
1604 ✗ descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1605 ✗ descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1606 ✗ } else if (!d->predefined_SLConfigDescriptor_seen){
1607 ✗ avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1608 ✗ d->predefined_SLConfigDescriptor_seen = 1;
1609 }
1610 ✗ return 0;
1611 }
1612
1613 ✗ static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1614 int target_tag)
1615 {
1616 int tag;
1617 ✗ AVIOContext *const pb = &d->pb.pub;
1618 ✗ int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1619 ✗ int ret = 0;
1620
1621 ✗ update_offsets(pb, &off, &len);
1622 ✗ if (len < 0 || len1 > len || len1 <= 0) {
1623 ✗ av_log(d->s, AV_LOG_ERROR,
1624 "Tag %x length violation new length %d bytes remaining %d\n",
1625 tag, len1, len);
1626 ✗ return AVERROR_INVALIDDATA;
1627 }
1628
1629 ✗ if (d->level++ >= MAX_LEVEL) {
1630 ✗ av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1631 ✗ ret = AVERROR_INVALIDDATA;
1632 ✗ goto done;
1633 }
1634
1635 ✗ if (target_tag && tag != target_tag) {
1636 ✗ av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1637 target_tag);
1638 ✗ ret = AVERROR_INVALIDDATA;
1639 ✗ goto done;
1640 }
1641
1642 ✗ switch (tag) {
1643 ✗ case MP4IODescrTag:
1644 ✗ ret = parse_MP4IODescrTag(d, off, len1);
1645 ✗ break;
1646 ✗ case MP4ODescrTag:
1647 ✗ ret = parse_MP4ODescrTag(d, off, len1);
1648 ✗ break;
1649 ✗ case MP4ESDescrTag:
1650 ✗ ret = parse_MP4ESDescrTag(d, off, len1);
1651 ✗ break;
1652 ✗ case MP4DecConfigDescrTag:
1653 ✗ ret = parse_MP4DecConfigDescrTag(d, off, len1);
1654 ✗ break;
1655 ✗ case MP4SLDescrTag:
1656 ✗ ret = parse_MP4SLDescrTag(d, off, len1);
1657 ✗ break;
1658 }
1659
1660
1661 ✗ done:
1662 ✗ d->level--;
1663 ✗ avio_seek(pb, off + len1, SEEK_SET);
1664 ✗ return ret;
1665 }
1666
1667 ✗ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1668 Mp4Descr *descr, int *descr_count, int max_descr_count)
1669 {
1670 MP4DescrParseContext d;
1671 int ret;
1672
1673 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1674 ✗ if (ret < 0)
1675 ✗ return ret;
1676
1677 ✗ ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1678
1679 ✗ *descr_count = d.descr_count;
1680 ✗ return ret;
1681 }
1682
1683 ✗ static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1684 Mp4Descr *descr, int *descr_count, int max_descr_count)
1685 {
1686 MP4DescrParseContext d;
1687 int ret;
1688
1689 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1690 ✗ if (ret < 0)
1691 ✗ return ret;
1692
1693 ✗ ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1694
1695 ✗ *descr_count = d.descr_count;
1696 ✗ return ret;
1697 }
1698
1699 ✗ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1700 int section_len)
1701 {
1702 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1703 ✗ MpegTSSectionFilter *tssf = &filter->u.section_filter;
1704 SectionHeader h;
1705 const uint8_t *p, *p_end;
1706 ✗ int mp4_descr_count = 0;
1707 ✗ Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1708 int i, pid;
1709 ✗ AVFormatContext *s = ts->stream;
1710
1711 ✗ p_end = section + section_len - 4;
1712 ✗ p = section;
1713 ✗ if (parse_section_header(&h, &p, p_end) < 0)
1714 ✗ return;
1715 ✗ if (h.tid != M4OD_TID)
1716 ✗ return;
1717 ✗ if (skip_identical(&h, tssf))
1718 ✗ return;
1719
1720 ✗ mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1721 MAX_MP4_DESCR_COUNT);
1722
1723 ✗ for (pid = 0; pid < NB_PID_MAX; pid++) {
1724 ✗ if (!ts->pids[pid])
1725 ✗ continue;
1726 ✗ for (i = 0; i < mp4_descr_count; i++) {
1727 PESContext *pes;
1728 AVStream *st;
1729 FFStream *sti;
1730 FFIOContext pb;
1731 ✗ if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1732 ✗ continue;
1733 ✗ if (ts->pids[pid]->type != MPEGTS_PES) {
1734 ✗ av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1735 ✗ continue;
1736 }
1737 ✗ pes = ts->pids[pid]->u.pes_filter.opaque;
1738 ✗ st = pes->st;
1739 ✗ if (!st)
1740 ✗ continue;
1741 ✗ sti = ffstream(st);
1742
1743 ✗ pes->sl = mp4_descr[i].sl;
1744
1745 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1746 mp4_descr[i].dec_config_descr_len);
1747 ✗ ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1748 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1749 ✗ st->codecpar->extradata_size > 0)
1750 ✗ sti->need_parsing = 0;
1751 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1752 ✗ st->codecpar->extradata_size > 0)
1753 ✗ sti->need_parsing = 0;
1754
1755 ✗ st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1756 ✗ sti->need_context_update = 1;
1757 }
1758 }
1759 ✗ for (i = 0; i < mp4_descr_count; i++)
1760 ✗ av_free(mp4_descr[i].dec_config_descr);
1761 }
1762
1763 ✗ static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1764 int section_len)
1765 {
1766 ✗ AVProgram *prg = NULL;
1767 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1768
1769 ✗ int idx = ff_find_stream_index(ts->stream, filter->pid);
1770 ✗ if (idx < 0)
1771 ✗ return;
1772
1773 /**
1774 * In case we receive an SCTE-35 packet before mpegts context is fully
1775 * initialized.
1776 */
1777 ✗ if (!ts->pkt)
1778 ✗ return;
1779
1780 ✗ new_data_packet(section, section_len, ts->pkt);
1781 ✗ ts->pkt->stream_index = idx;
1782 ✗ prg = av_find_program_from_stream(ts->stream, NULL, idx);
1783 ✗ if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1784 ✗ MpegTSFilter *f = ts->pids[prg->pcr_pid];
1785 ✗ if (f && f->last_pcr != -1)
1786 ✗ ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1787 }
1788 ✗ ts->stop_parse = 1;
1789
1790 }
1791
1792 static const uint8_t opus_coupled_stream_cnt[9] = {
1793 1, 0, 1, 1, 2, 2, 2, 3, 3
1794 };
1795
1796 static const uint8_t opus_stream_cnt[9] = {
1797 1, 1, 1, 2, 2, 3, 4, 4, 5,
1798 };
1799
1800 static const uint8_t opus_channel_map[8][8] = {
1801 { 0 },
1802 { 0,1 },
1803 { 0,2,1 },
1804 { 0,1,2,3 },
1805 { 0,4,1,2,3 },
1806 { 0,4,1,2,3,5 },
1807 { 0,4,1,2,3,5,6 },
1808 { 0,6,1,2,3,4,5,7 },
1809 };
1810
1811 845 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1812 const uint8_t **pp, const uint8_t *desc_list_end,
1813 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1814 MpegTSContext *ts)
1815 {
1816 845 FFStream *const sti = ffstream(st);
1817 const uint8_t *desc_end;
1818 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1819 char language[252];
1820 int i;
1821
1822 845 desc_tag = get8(pp, desc_list_end);
1823
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 845 if (desc_tag < 0)
1824 519 return AVERROR_INVALIDDATA;
1825 326 desc_len = get8(pp, desc_list_end);
1826
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 326 if (desc_len < 0)
1827 ✗ return AVERROR_INVALIDDATA;
1828 326 desc_end = *pp + desc_len;
1829
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 326 if (desc_end > desc_list_end)
1830 ✗ return AVERROR_INVALIDDATA;
1831
1832 326 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1833
1834
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 326 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1835 stream_type == STREAM_TYPE_PRIVATE_DATA)
1836 12 mpegts_find_stream_type(st, desc_tag, DESC_types);
1837
1838
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 326 switch (desc_tag) {
1839 ✗ case VIDEO_STREAM_DESCRIPTOR:
1840 ✗ if (get8(pp, desc_end) & 0x1) {
1841 ✗ st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1842 }
1843 ✗ break;
1844 ✗ case SL_DESCRIPTOR:
1845 ✗ desc_es_id = get16(pp, desc_end);
1846 ✗ if (desc_es_id < 0)
1847 ✗ break;
1848 ✗ if (ts && ts->pids[pid])
1849 ✗ ts->pids[pid]->es_id = desc_es_id;
1850 ✗ for (i = 0; i < mp4_descr_count; i++)
1851 ✗ if (mp4_descr[i].dec_config_descr_len &&
1852 ✗ mp4_descr[i].es_id == desc_es_id) {
1853 FFIOContext pb;
1854 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1855 ✗ mp4_descr[i].dec_config_descr_len);
1856 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1857 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1858 ✗ st->codecpar->extradata_size > 0) {
1859 ✗ sti->need_parsing = 0;
1860 ✗ sti->need_context_update = 1;
1861 }
1862 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1863 ✗ mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1864 }
1865 ✗ break;
1866 ✗ case FMC_DESCRIPTOR:
1867 ✗ if (get16(pp, desc_end) < 0)
1868 ✗ break;
1869 ✗ if (mp4_descr_count > 0 &&
1870 ✗ (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1871 ✗ (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1872 ✗ sti->request_probe > 0) &&
1873 ✗ mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1874 FFIOContext pb;
1875 ✗ ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1876 mp4_descr->dec_config_descr_len);
1877 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1878 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1879 ✗ st->codecpar->extradata_size > 0) {
1880 ✗ sti->request_probe = sti->need_parsing = 0;
1881 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1882 ✗ sti->need_context_update = 1;
1883 }
1884 }
1885 ✗ break;
1886 ✗ case 0x56: /* DVB teletext descriptor */
1887 {
1888 ✗ uint8_t *extradata = NULL;
1889 ✗ int language_count = desc_len / 5, ret;
1890
1891 ✗ if (desc_len > 0 && desc_len % 5 != 0)
1892 ✗ return AVERROR_INVALIDDATA;
1893
1894 ✗ if (language_count > 0) {
1895 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1896 ✗ av_assert0(language_count <= sizeof(language) / 4);
1897
1898 ✗ if (st->codecpar->extradata == NULL) {
1899 ✗ ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1900 ✗ if (ret < 0)
1901 ✗ return ret;
1902 }
1903
1904 ✗ if (st->codecpar->extradata_size < language_count * 2)
1905 ✗ return AVERROR_INVALIDDATA;
1906
1907 ✗ extradata = st->codecpar->extradata;
1908
1909 ✗ for (i = 0; i < language_count; i++) {
1910 ✗ language[i * 4 + 0] = get8(pp, desc_end);
1911 ✗ language[i * 4 + 1] = get8(pp, desc_end);
1912 ✗ language[i * 4 + 2] = get8(pp, desc_end);
1913 ✗ language[i * 4 + 3] = ',';
1914
1915 ✗ memcpy(extradata, *pp, 2);
1916 ✗ extradata += 2;
1917
1918 ✗ *pp += 2;
1919 }
1920
1921 ✗ language[i * 4 - 1] = 0;
1922 ✗ av_dict_set(&st->metadata, "language", language, 0);
1923 ✗ sti->need_context_update = 1;
1924 }
1925 }
1926 ✗ break;
1927 9 case 0x59: /* subtitling descriptor */
1928 {
1929 /* 8 bytes per DVB subtitle substream data:
1930 * ISO_639_language_code (3 bytes),
1931 * subtitling_type (1 byte),
1932 * composition_page_id (2 bytes),
1933 * ancillary_page_id (2 bytes) */
1934 9 int language_count = desc_len / 8, ret;
1935
1936
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 9 if (desc_len > 0 && desc_len % 8 != 0)
1937 ✗ return AVERROR_INVALIDDATA;
1938
1939
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 9 if (language_count > 1) {
1940 ✗ avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1941 }
1942
1943
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 9 if (language_count > 0) {
1944 uint8_t *extradata;
1945
1946 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1947
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 9 av_assert0(language_count <= sizeof(language) / 4);
1948
1949
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 9 if (st->codecpar->extradata == NULL) {
1950 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1951
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 3 if (ret < 0)
1952 ✗ return ret;
1953 }
1954
1955
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 9 if (st->codecpar->extradata_size < language_count * 5)
1956 ✗ return AVERROR_INVALIDDATA;
1957
1958 9 extradata = st->codecpar->extradata;
1959
1960
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 18 for (i = 0; i < language_count; i++) {
1961 9 language[i * 4 + 0] = get8(pp, desc_end);
1962 9 language[i * 4 + 1] = get8(pp, desc_end);
1963 9 language[i * 4 + 2] = get8(pp, desc_end);
1964 9 language[i * 4 + 3] = ',';
1965
1966 /* hearing impaired subtitles detection using subtitling_type */
1967
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 9 switch (*pp[0]) {
1968 ✗ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1969 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1970 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1971 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1972 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1973 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1974 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1975 ✗ break;
1976 }
1977
1978 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1979 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1980 9 extradata += 5;
1981
1982 9 *pp += 4;
1983 }
1984
1985 9 language[i * 4 - 1] = 0;
1986 9 av_dict_set(&st->metadata, "language", language, 0);
1987 9 sti->need_context_update = 1;
1988 }
1989 }
1990 9 break;
1991 204 case ISO_639_LANGUAGE_DESCRIPTOR:
1992
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 402 for (i = 0; i + 4 <= desc_len; i += 4) {
1993 198 language[i + 0] = get8(pp, desc_end);
1994 198 language[i + 1] = get8(pp, desc_end);
1995 198 language[i + 2] = get8(pp, desc_end);
1996 198 language[i + 3] = ',';
1997 198 switch (get8(pp, desc_end)) {
1998 ✗ case 0x01:
1999 ✗ st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2000 ✗ break;
2001 ✗ case 0x02:
2002 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2003 ✗ break;
2004 44 case 0x03:
2005 44 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2006 44 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2007 44 break;
2008 }
2009 }
2010
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 204 if (i && language[0]) {
2011 194 language[i - 1] = 0;
2012 /* don't overwrite language, as it may already have been set by
2013 * another, more specific descriptor (e.g. supplementary audio) */
2014 194 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2015 }
2016 204 break;
2017 8 case REGISTRATION_DESCRIPTOR:
2018 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2019 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2020
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 8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2021 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2022
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 3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2023 2 sti->request_probe = 50;
2024 }
2025 8 break;
2026 31 case 0x52: /* stream identifier descriptor */
2027 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2028 31 break;
2029 4 case METADATA_DESCRIPTOR:
2030
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 4 if (get16(pp, desc_end) == 0xFFFF)
2031 4 *pp += 4;
2032
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 4 if (get8(pp, desc_end) == 0xFF) {
2033 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2034
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2035 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2036 }
2037 4 break;
2038 4 case 0x7f: /* DVB extension descriptor */
2039 4 ext_desc_tag = get8(pp, desc_end);
2040
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 4 if (ext_desc_tag < 0)
2041 ✗ return AVERROR_INVALIDDATA;
2042
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2043 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2044
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 3 if (!st->codecpar->extradata) {
2045 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2046 AV_INPUT_BUFFER_PADDING_SIZE);
2047
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 1 if (!st->codecpar->extradata)
2048 ✗ return AVERROR(ENOMEM);
2049
2050 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2051 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2052
2053 1 channel_config_code = get8(pp, desc_end);
2054
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 1 if (channel_config_code < 0)
2055 ✗ return AVERROR_INVALIDDATA;
2056
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 1 if (channel_config_code <= 0x8) {
2057
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 1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2058 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2059
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 1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2060 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2061 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2062 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2063
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 1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2064 } else {
2065 ✗ avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2066 }
2067 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2068 1 sti->need_context_update = 1;
2069 }
2070 }
2071
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 4 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2072 int flags;
2073
2074 ✗ if (desc_len < 1)
2075 ✗ return AVERROR_INVALIDDATA;
2076 ✗ flags = get8(pp, desc_end);
2077
2078 ✗ if ((flags & 0x80) == 0) /* mix_type */
2079 ✗ st->disposition |= AV_DISPOSITION_DEPENDENT;
2080
2081 ✗ switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2082 ✗ case 0x01:
2083 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2084 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2085 ✗ break;
2086 ✗ case 0x02:
2087 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2088 ✗ break;
2089 ✗ case 0x03:
2090 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2091 ✗ break;
2092 }
2093
2094 ✗ if (flags & 0x01) { /* language_code_present */
2095 ✗ if (desc_len < 4)
2096 ✗ return AVERROR_INVALIDDATA;
2097 ✗ language[0] = get8(pp, desc_end);
2098 ✗ language[1] = get8(pp, desc_end);
2099 ✗ language[2] = get8(pp, desc_end);
2100 ✗ language[3] = 0;
2101
2102 /* This language always has to override a possible
2103 * ISO 639 language descriptor language */
2104 ✗ if (language[0])
2105 ✗ av_dict_set(&st->metadata, "language", language, 0);
2106 }
2107 }
2108 4 break;
2109 6 case 0x6a: /* ac-3_descriptor */
2110 {
2111 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2112
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 6 if (component_type_flag) {
2113 ✗ int component_type = get8(pp, desc_end);
2114 ✗ int service_type_mask = 0x38; // 0b00111000
2115 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2116 ✗ if (service_type == 0x02 /* 0b010 */) {
2117 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2118 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2119 }
2120 }
2121 }
2122 6 break;
2123 ✗ case 0x7a: /* enhanced_ac-3_descriptor */
2124 {
2125 ✗ int component_type_flag = get8(pp, desc_end) & (1 << 7);
2126 ✗ if (component_type_flag) {
2127 ✗ int component_type = get8(pp, desc_end);
2128 ✗ int service_type_mask = 0x38; // 0b00111000
2129 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2130 ✗ if (service_type == 0x02 /* 0b010 */) {
2131 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2132 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2133 }
2134 }
2135 }
2136 ✗ break;
2137 ✗ case 0xfd: /* ARIB data coding type descriptor */
2138 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2139 // for captions
2140 ✗ if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2141 // This structure is defined in STD-B10, part 1, listing 5.4 and
2142 // part 2, 6.2.20).
2143 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2144 // Component tag limits are documented in TR-B14, fascicle 2,
2145 // Vol. 3, Section 2, 4.2.8.1
2146 ✗ int actual_component_tag = sti->stream_identifier - 1;
2147 ✗ int picked_profile = AV_PROFILE_UNKNOWN;
2148 ✗ int data_component_id = get16(pp, desc_end);
2149 ✗ if (data_component_id < 0)
2150 ✗ return AVERROR_INVALIDDATA;
2151
2152 switch (data_component_id) {
2153 ✗ case 0x0008:
2154 // [0x30..0x37] are component tags utilized for
2155 // non-mobile captioning service ("profile A").
2156 ✗ if (actual