FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 1107 1932 57.3%
Functions: 49 70 70.0%
Branches: 608 1302 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 36133 static int discard_pid(MpegTSContext *ts, unsigned int pid)
383 {
384 int i, j, k;
385 36133 int used = 0, discarded = 0;
386 struct Program *p;
387
388
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 36133 if (pid == PAT_PID)
389 3009 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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 66221 for (k = 0; k < ts->stream->nb_programs; k++)
394
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 33097 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
395 ✗ break;
396
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 33124 if (k == ts->stream->nb_programs)
397 33124 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 6482 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
424 const uint8_t *buf, int buf_size, int is_start)
425 {
426 6482 MpegTSSectionFilter *tss = &tss1->u.section_filter;
427 6482 uint8_t *cur_section_buf = NULL;
428 int len, offset;
429
430
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 6482 if (is_start) {
431 6447 memcpy(tss->section_buf, buf, buf_size);
432 6447 tss->section_index = buf_size;
433 6447 tss->section_h_size = -1;
434 6447 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 6482 offset = 0;
446 6482 cur_section_buf = tss->section_buf;
447
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 12929 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
448 /* compute section length if possible */
449
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 6690 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
450 6482 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
451
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 6482 if (len > MAX_SECTION_SIZE)
452 ✗ return;
453 6482 tss->section_h_size = len;
454 }
455
456
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 6690 if (tss->section_h_size != -1 &&
457
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 6482 tss->section_index >= offset + tss->section_h_size) {
458 6447 int crc_valid = 1;
459 6447 tss->end_of_section_reached = 1;
460
461
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 6447 if (tss->check_crc) {
462 6447 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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 6447 if (tss->section_h_size >= 4)
464 6447 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
465
466
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 6447 if (crc_valid) {
467 6447 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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 6447 if (crc_valid) {
474 6447 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
475
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 6447 if (crc_valid != 1)
476 ✗ tss->last_ver = -1;
477 }
478
479 6447 cur_section_buf += tss->section_h_size;
480 6447 offset += tss->section_h_size;
481 6447 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] == 0x47) {
594 1906571 int pid = AV_RB16(buf+1) & 0x1FFF;
595 1906571 int asc = buf[i + 3] & 0x30;
596
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 1906571 if (!probe || pid == 0x1FFF || asc) {
597 1566252 int x = i % packet_size;
598 1566252 stat[x]++;
599 1566252 stat_all++;
600
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 1566252 if (stat[x] > best_score) {
601 118765 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 5767 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
659 {
660
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 5767 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
661 5183 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 31558 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
670 {
671 const uint8_t *p;
672 int c;
673
674 31558 p = *pp;
675
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 31558 if (p >= p_end)
676 1461 return AVERROR_INVALIDDATA;
677 30097 c = *p++;
678 30097 *pp = p;
679 30097 return c;
680 }
681
682 9707 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
683 {
684 const uint8_t *p;
685 int c;
686
687 9707 p = *pp;
688
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 9707 if (1 >= p_end - p)
689 313 return AVERROR_INVALIDDATA;
690 9394 c = AV_RB16(p);
691 9394 p += 2;
692 9394 *pp = p;
693 9394 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 6445 static int parse_section_header(SectionHeader *h,
765 const uint8_t **pp, const uint8_t *p_end)
766 {
767 int val;
768
769 6445 val = get8(pp, p_end);
770
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 6445 if (val < 0)
771 ✗ return val;
772 6445 h->tid = val;
773 6445 *pp += 2;
774 6445 val = get16(pp, p_end);
775
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 6445 if (val < 0)
776 ✗ return val;
777 6445 h->id = val;
778 6445 val = get8(pp, p_end);
779
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 6445 if (val < 0)
780 ✗ return val;
781 6445 h->version = (val >> 1) & 0x1f;
782 6445 h->current_next = val & 0x01;
783 6445 val = get8(pp, p_end);
784
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 6445 if (val < 0)
785 ✗ return val;
786 6445 h->sec_num = val;
787 6445 val = get8(pp, p_end);
788
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 6445 if (val < 0)
789 ✗ return val;
790 6445 h->last_sec_num = val;
791 6445 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 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
802 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
803 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
804 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
805 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
806 { 0x10, 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 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
811 #endif
812 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
813 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
814 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
815 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
816 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
817 { 0x33, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
818 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
819 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
820 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
821 { 0xd4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
822 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
823 { 0 },
824 };
825
826 static const StreamType HDMV_types[] = {
827 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
828 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
829 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
830 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
831 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
832 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
833 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
834 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
835 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
836 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
837 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
838 { 0 },
839 };
840
841 /* SCTE types */
842 static const StreamType SCTE_types[] = {
843 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
844 { 0 },
845 };
846
847 /* ATSC ? */
848 static const StreamType MISC_types[] = {
849 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
850 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
851 { 0 },
852 };
853
854 /* HLS Sample Encryption Types */
855 static const StreamType HLS_SAMPLE_ENC_types[] = {
856 { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
857 { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
858 { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
859 { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
860 { 0 },
861 };
862
863 static const StreamType REGD_types[] = {
864 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
865 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
866 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
867 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
868 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
869 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
870 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
871 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
872 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
873 { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
874 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
875 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
876 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
877 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
878 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
879 { 0 },
880 };
881
882 static const StreamType METADATA_types[] = {
883 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
884 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
885 { 0 },
886 };
887
888 /* descriptor present */
889 static const StreamType DESC_types[] = {
890 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
891 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
892 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
893 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
894 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
895 { 0 },
896 };
897
898 165 static void mpegts_find_stream_type(AVStream *st,
899 uint32_t stream_type,
900 const StreamType *types)
901 {
902 165 FFStream *const sti = ffstream(st);
903
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 947 for (; types->stream_type; types++)
904
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 894 if (stream_type == types->stream_type) {
905
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 112 if (st->codecpar->codec_type != types->codec_type ||
906
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 10 st->codecpar->codec_id != types->codec_id) {
907 111 st->codecpar->codec_type = types->codec_type;
908 111 st->codecpar->codec_id = types->codec_id;
909 111 sti->need_context_update = 1;
910 }
911 112 sti->request_probe = 0;
912 112 return;
913 }
914 }
915
916 105 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
917 uint32_t stream_type, uint32_t prog_reg_desc)
918 {
919 105 FFStream *const sti = ffstream(st);
920 105 int old_codec_type = st->codecpar->codec_type;
921 105 int old_codec_id = st->codecpar->codec_id;
922 105 int old_codec_tag = st->codecpar->codec_tag;
923
924 105 avpriv_set_pts_info(st, 33, 1, 90000);
925 105 st->priv_data = pes;
926 105 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
927 105 st->codecpar->codec_id = AV_CODEC_ID_NONE;
928 105 sti->need_parsing = AVSTREAM_PARSE_FULL;
929 105 pes->st = st;
930 105 pes->stream_type = stream_type;
931
932 105 av_log(pes->stream, AV_LOG_DEBUG,
933 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
934 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
935
936 105 st->codecpar->codec_tag = pes->stream_type;
937
938 105 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
939
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 105 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
940 7 sti->request_probe = 50;
941
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 105 if ((prog_reg_desc == AV_RL32("HDMV") ||
942
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 105 prog_reg_desc == AV_RL32("HDPR")) &&
943 ✗ st->codecpar->codec_id == AV_CODEC_ID_NONE) {
944 ✗ mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
945 ✗ if (pes->stream_type == 0x83) {
946 // HDMV TrueHD streams also contain an AC3 coded version of the
947 // audio track - add a second stream for this
948 AVStream *sub_st;
949 // priv_data cannot be shared between streams
950 ✗ PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
951 ✗ if (!sub_pes)
952 ✗ return AVERROR(ENOMEM);
953
954 ✗ sub_st = avformat_new_stream(pes->stream, NULL);
955 ✗ if (!sub_st) {
956 ✗ av_free(sub_pes);
957 ✗ return AVERROR(ENOMEM);
958 }
959
960 ✗ sub_st->id = pes->pid;
961 ✗ avpriv_set_pts_info(sub_st, 33, 1, 90000);
962 ✗ sub_st->priv_data = sub_pes;
963 ✗ sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
964 ✗ sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
965 ✗ ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
966 ✗ sub_pes->sub_st = pes->sub_st = sub_st;
967 }
968 }
969
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
970 29 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
971
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
972 8 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
973
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
974 8 st->codecpar->codec_id = old_codec_id;
975 8 st->codecpar->codec_type = old_codec_type;
976 }
977
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 105 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
978
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 97 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
979
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 8 sti->probe_packets > 0 &&
980 stream_type == STREAM_TYPE_PRIVATE_DATA) {
981 5 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
982 5 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
983 5 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
984 }
985
986 /* queue a context update if properties changed */
987
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 105 if (old_codec_type != st->codecpar->codec_type ||
988
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 3 old_codec_id != st->codecpar->codec_id ||
989
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 3 old_codec_tag != st->codecpar->codec_tag)
990 105 sti->need_context_update = 1;
991
992 105 return 0;
993 }
994
995 55796 static void reset_pes_packet_state(PESContext *pes)
996 {
997 55796 pes->pts = AV_NOPTS_VALUE;
998 55796 pes->dts = AV_NOPTS_VALUE;
999 55796 pes->data_index = 0;
1000 55796 pes->flags = 0;
1001 55796 av_buffer_unref(&pes->buffer);
1002 55796 }
1003
1004 12 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1005 {
1006 12 av_packet_unref(pkt);
1007 12 pkt->data = (uint8_t *)buffer;
1008 12 pkt->size = len;
1009 12 }
1010
1011 28973 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1012 {
1013 uint8_t *sd;
1014
1015 28973 av_packet_unref(pkt);
1016
1017 28973 pkt->buf = pes->buffer;
1018 28973 pkt->data = pes->buffer->data;
1019 28973 pkt->size = pes->data_index;
1020
1021
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 28973 if (pes->PES_packet_length &&
1022
2/2
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 26050 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1023 PES_START_SIZE) {
1024 92 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1025 92 pes->flags |= AV_PKT_FLAG_CORRUPT;
1026 }
1027 28973 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1028
1029 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1030
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 28973 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1031 ✗ pkt->stream_index = pes->sub_st->index;
1032 else
1033 28973 pkt->stream_index = pes->st->index;
1034 28973 pkt->pts = pes->pts;
1035 28973 pkt->dts = pes->dts;
1036 /* store position of first TS packet of this PES packet */
1037 28973 pkt->pos = pes->ts_packet_pos;
1038 28973 pkt->flags = pes->flags;
1039
1040 28973 pes->buffer = NULL;
1041 28973 reset_pes_packet_state(pes);
1042
1043 28973 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1044
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 28973 if (!sd)
1045 ✗ return AVERROR(ENOMEM);
1046 28973 *sd = pes->stream_id;
1047
1048 28973 return 0;
1049 }
1050
1051 ✗ static uint64_t get_ts64(GetBitContext *gb, int bits)
1052 {
1053 ✗ if (get_bits_left(gb) < bits)
1054 ✗ return AV_NOPTS_VALUE;
1055 ✗ return get_bits64(gb, bits);
1056 }
1057
1058 ✗ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1059 const uint8_t *buf, int buf_size)
1060 {
1061 GetBitContext gb;
1062 ✗ int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1063 ✗ int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1064 ✗ int dts_flag = -1, cts_flag = -1;
1065 ✗ int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1066 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1067 ✗ int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1068
1069 ✗ memcpy(buf_padded, buf, buf_padded_size);
1070
1071 ✗ init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1072
1073 ✗ if (sl->use_au_start)
1074 ✗ au_start_flag = get_bits1(&gb);
1075 ✗ if (sl->use_au_end)
1076 ✗ au_end_flag = get_bits1(&gb);
1077 ✗ if (!sl->use_au_start && !sl->use_au_end)
1078 ✗ au_start_flag = au_end_flag = 1;
1079 ✗ if (sl->ocr_len > 0)
1080 ✗ ocr_flag = get_bits1(&gb);
1081 ✗ if (sl->use_idle)
1082 ✗ idle_flag = get_bits1(&gb);
1083 ✗ if (sl->use_padding)
1084 ✗ padding_flag = get_bits1(&gb);
1085 ✗ if (padding_flag)
1086 ✗ padding_bits = get_bits(&gb, 3);
1087
1088 ✗ if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1089 ✗ if (sl->packet_seq_num_len)
1090 ✗ skip_bits_long(&gb, sl->packet_seq_num_len);
1091 ✗ if (sl->degr_prior_len)
1092 ✗ if (get_bits1(&gb))
1093 ✗ skip_bits(&gb, sl->degr_prior_len);
1094 ✗ if (ocr_flag)
1095 ✗ skip_bits_long(&gb, sl->ocr_len);
1096 ✗ if (au_start_flag) {
1097 ✗ if (sl->use_rand_acc_pt)
1098 ✗ get_bits1(&gb);
1099 ✗ if (sl->au_seq_num_len > 0)
1100 ✗ skip_bits_long(&gb, sl->au_seq_num_len);
1101 ✗ if (sl->use_timestamps) {
1102 ✗ dts_flag = get_bits1(&gb);
1103 ✗ cts_flag = get_bits1(&gb);
1104 }
1105 }
1106 ✗ if (sl->inst_bitrate_len)
1107 ✗ inst_bitrate_flag = get_bits1(&gb);
1108 ✗ if (dts_flag == 1)
1109 ✗ dts = get_ts64(&gb, sl->timestamp_len);
1110 ✗ if (cts_flag == 1)
1111 ✗ cts = get_ts64(&gb, sl->timestamp_len);
1112 ✗ if (sl->au_len > 0)
1113 ✗ skip_bits_long(&gb, sl->au_len);
1114 ✗ if (inst_bitrate_flag)
1115 ✗ skip_bits_long(&gb, sl->inst_bitrate_len);
1116 }
1117
1118 ✗ if (dts != AV_NOPTS_VALUE)
1119 ✗ pes->dts = dts;
1120 ✗ if (cts != AV_NOPTS_VALUE)
1121 ✗ pes->pts = cts;
1122
1123 ✗ if (sl->timestamp_len && sl->timestamp_res)
1124 ✗ avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1125
1126 ✗ return (get_bits_count(&gb) + 7) >> 3;
1127 }
1128
1129 29074 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1130 {
1131 29074 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1132
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 29074 if (!ts->pools[index]) {
1133
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 158 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1134 158 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1135
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 158 if (!ts->pools[index])
1136 ✗ return NULL;
1137 }
1138 29074 return av_buffer_pool_get(ts->pools[index]);
1139 }
1140
1141 /* return non zero if a packet could be constructed */
1142 374489 static int mpegts_push_data(MpegTSFilter *filter,
1143 const uint8_t *buf, int buf_size, int is_start,
1144 int64_t pos)
1145 {
1146 374489 PESContext *pes = filter->u.pes_filter.opaque;
1147 374489 MpegTSContext *ts = pes->ts;
1148 const uint8_t *p;
1149 int ret, len;
1150
1151
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 374489 if (!ts->pkt)
1152 ✗ return 0;
1153
1154
2/2
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 374489 if (is_start) {
1155
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✗ Branch 3 not taken.
 29674 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1156 2851 ret = new_pes_packet(pes, ts->pkt);
1157
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 2851 if (ret < 0)
1158 ✗ return ret;
1159 2851 ts->stop_parse = 1;
1160 } else {
1161 26823 reset_pes_packet_state(pes);
1162 }
1163 29674 pes->state = MPEGTS_HEADER;
1164 29674 pes->ts_packet_pos = pos;
1165 }
1166 374489 p = buf;
1167
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 1211287 while (buf_size > 0) {
1168
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 462309 switch (pes->state) {
1169 29674 case MPEGTS_HEADER:
1170 29674 len = PES_START_SIZE - pes->data_index;
1171
2/2
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 29674 if (len > buf_size)
1172 2 len = buf_size;
1173 29674 memcpy(pes->header + pes->data_index, p, len);
1174 29674 pes->data_index += len;
1175 29674 p += len;
1176 29674 buf_size -= len;
1177
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 29674 if (pes->data_index == PES_START_SIZE) {
1178 /* we got all the PES or section header. We can now
1179 * decide */
1180
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 29672 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1181
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 29665 pes->header[2] == 0x01) {
1182 /* it must be an MPEG-2 PES stream */
1183 29665 pes->stream_id = pes->header[3];
1184 29665 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1185
1186
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 29665 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1187
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 591 (!pes->sub_st ||
1188 ✗ pes->sub_st->discard == AVDISCARD_ALL)) ||
1189
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 29074 pes->stream_id == STREAM_ID_PADDING_STREAM)
1190 591 goto skip;
1191
1192 /* stream not present in PMT */
1193
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✓ Branch 1 taken 29074 times.
 29074 if (!pes->st) {
1194 ✗ if (ts->skip_changes)
1195 ✗ goto skip;
1196 ✗ if (ts->merge_pmt_versions)
1197 ✗ goto skip; /* wait for PMT to merge new stream */
1198
1199 ✗ pes->st = avformat_new_stream(ts->stream, NULL);
1200 ✗ if (!pes->st)
1201 ✗ return AVERROR(ENOMEM);
1202 ✗ pes->st->id = pes->pid;
1203 ✗ mpegts_set_stream_info(pes->st, pes, 0, 0);
1204 }
1205
1206 29074 pes->PES_packet_length = AV_RB16(pes->header + 4);
1207 /* NOTE: zero length means the PES size is unbounded */
1208
1209
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 29074 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1210
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 29074 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1211
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 29074 pes->stream_id != STREAM_ID_ECM_STREAM &&
1212
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 29074 pes->stream_id != STREAM_ID_EMM_STREAM &&
1213
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 29074 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1214
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 29074 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1215
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 58148 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1216 29074 FFStream *const pes_sti = ffstream(pes->st);
1217 29074 pes->state = MPEGTS_PESHEADER;
1218
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 29074 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1219 2 av_log(pes->stream, AV_LOG_TRACE,
1220 "pid=%x stream_type=%x probing\n",
1221 pes->pid,
1222 pes->stream_type);
1223 2 pes_sti->request_probe = 1;
1224 }
1225 } else {
1226 ✗ pes->pes_header_size = 6;
1227 ✗ pes->state = MPEGTS_PAYLOAD;
1228 ✗ pes->data_index = 0;
1229 }
1230 } else {
1231 /* otherwise, it should be a table */
1232 /* skip packet */
1233 7 skip:
1234 598 pes->state = MPEGTS_SKIP;
1235 598 continue;
1236 }
1237 }
1238 29076 break;
1239 /**********************************************/
1240 /* PES packing parsing */
1241 29074 case MPEGTS_PESHEADER:
1242 29074 len = PES_HEADER_SIZE - pes->data_index;
1243
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 29074 if (len < 0)
1244 ✗ return AVERROR_INVALIDDATA;
1245
1/2
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 29074 if (len > buf_size)
1246 ✗ len = buf_size;
1247 29074 memcpy(pes->header + pes->data_index, p, len);
1248 29074 pes->data_index += len;
1249 29074 p += len;
1250 29074 buf_size -= len;
1251
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✗ Branch 1 not taken.
 29074 if (pes->data_index == PES_HEADER_SIZE) {
1252 29074 pes->pes_header_size = pes->header[8] + 9;
1253 29074 pes->state = MPEGTS_PESHEADER_FILL;
1254 }
1255 29074 break;
1256 29074 case MPEGTS_PESHEADER_FILL:
1257 29074 len = pes->pes_header_size - pes->data_index;
1258
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 29074 if (len < 0)
1259 ✗ return AVERROR_INVALIDDATA;
1260
1/2
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 29074 if (len > buf_size)
1261 ✗ len = buf_size;
1262 29074 memcpy(pes->header + pes->data_index, p, len);
1263 29074 pes->data_index += len;
1264 29074 p += len;
1265 29074 buf_size -= len;
1266
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✗ Branch 1 not taken.
 29074 if (pes->data_index == pes->pes_header_size) {
1267 const uint8_t *r;
1268 unsigned int flags, pes_ext, skip;
1269
1270 29074 flags = pes->header[7];
1271 29074 r = pes->header + 9;
1272 29074 pes->pts = AV_NOPTS_VALUE;
1273 29074 pes->dts = AV_NOPTS_VALUE;
1274
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 29074 if ((flags & 0xc0) == 0x80) {
1275 10075 pes->dts = pes->pts = ff_parse_pes_pts(r);
1276 10075 r += 5;
1277
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✓ Branch 1 taken 17145 times.
 18999 } else if ((flags & 0xc0) == 0xc0) {
1278 1854 pes->pts = ff_parse_pes_pts(r);
1279 1854 r += 5;
1280 1854 pes->dts = ff_parse_pes_pts(r);
1281 1854 r += 5;
1282 }
1283 29074 pes->extended_stream_id = -1;
1284
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✗ Branch 0 not taken.
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 29074 if (flags & 0x01) { /* PES extension */
1285 ✗ pes_ext = *r++;
1286 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1287 ✗ skip = (pes_ext >> 4) & 0xb;
1288 ✗ skip += skip & 0x9;
1289 ✗ r += skip;
1290 ✗ if ((pes_ext & 0x41) == 0x01 &&
1291 ✗ (r + 2) <= (pes->header + pes->pes_header_size)) {
1292 /* PES extension 2 */
1293 ✗ if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1294 ✗ pes->extended_stream_id = r[1];
1295 }
1296 }
1297
1298 /* we got the full header. We parse it and get the payload */
1299 29074 pes->state = MPEGTS_PAYLOAD;
1300 29074 pes->data_index = 0;
1301
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 29074 if (pes->stream_type == 0x12 && buf_size > 0) {
1302 ✗ int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1303 buf_size);
1304 ✗ pes->pes_header_size += sl_header_bytes;
1305 ✗ p += sl_header_bytes;
1306 ✗ buf_size -= sl_header_bytes;
1307 }
1308
2/2
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 29074 if (pes->stream_type == STREAM_TYPE_METADATA &&
1309
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 6 pes->stream_id == STREAM_ID_METADATA_STREAM &&
1310 ✗ pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV &&
1311 buf_size >= 5) {
1312 /* skip metadata access unit header - see MISB ST 1402 */
1313 ✗ pes->pes_header_size += 5;
1314 ✗ p += 5;
1315 ✗ buf_size -= 5;
1316 }
1317
1/2
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✗ Branch 1 not taken.
 29074 if ( pes->ts->fix_teletext_pts
1318
1/2
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✗ Branch 1 not taken.
 29074 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1319
2/2
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✓ Branch 1 taken 28821 times.
 29074 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1320 ) {
1321 253 AVProgram *p = NULL;
1322 253 int pcr_found = 0;
1323
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✓ Branch 2 taken 253 times.
 506 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1324
2/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 253 times.
✗ Branch 3 not taken.
 253 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1325 253 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1326
1/2
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✗ Branch 1 not taken.
 253 if (f) {
1327 253 AVStream *st = NULL;
1328
1/2
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✗ Branch 1 not taken.
 253 if (f->type == MPEGTS_PES) {
1329 253 PESContext *pcrpes = f->u.pes_filter.opaque;
1330
1/2
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✗ Branch 1 not taken.
 253 if (pcrpes)
1331 253 st = pcrpes->st;
1332 ✗ } else if (f->type == MPEGTS_PCR) {
1333 int i;
1334 ✗ for (i = 0; i < p->nb_stream_indexes; i++) {
1335 ✗ AVStream *pst = pes->stream->streams[p->stream_index[i]];
1336 ✗ if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1337 ✗ st = pst;
1338 }
1339 }
1340
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 253 if (f->last_pcr != -1 && !f->discard) {
1341 // teletext packets do not always have correct timestamps,
1342 // the standard says they should be handled after 40.6 ms at most,
1343 // and the pcr error to this packet should be no more than 100 ms.
1344 // TODO: we should interpolate the PCR, not just use the last one
1345 ✗ int64_t pcr = f->last_pcr / 300;
1346 ✗ pcr_found = 1;
1347 ✗ if (st) {
1348 ✗ const FFStream *const sti = ffstream(st);
1349 ✗ FFStream *const pes_sti = ffstream(pes->st);
1350
1351 ✗ pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1352 ✗ pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1353 }
1354 ✗ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1355 ✗ pes->pts = pes->dts = pcr;
1356 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1357 ✗ pes->dts > pcr + 3654 + 9000) {
1358 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1359 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1360 ✗ pes->dts > pcr + 10*90000) { //10sec
1361 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1362 }
1363 ✗ break;
1364 }
1365 }
1366 }
1367 }
1368
1369
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 253 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1370 !pcr_found) {
1371 ✗ av_log(pes->stream, AV_LOG_VERBOSE,
1372 "Forcing DTS/PTS to be unset for a "
1373 "non-trustworthy PES packet for PID %d as "
1374 "PCR hasn't been received yet.\n",
1375 pes->pid);
1376 ✗ pes->dts = pes->pts = AV_NOPTS_VALUE;
1377 }
1378 }
1379 }
1380 29074 break;
1381 355945 case MPEGTS_PAYLOAD:
1382 do {
1383 355945 int max_packet_size = ts->max_packet_size;
1384
3/4
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✗ Branch 3 not taken.
 355945 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1385 195689 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1386
1387
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 355945 if (pes->data_index > 0 &&
1388
1/2
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 326871 pes->data_index + buf_size > max_packet_size) {
1389 ✗ ret = new_pes_packet(pes, ts->pkt);
1390 ✗ if (ret < 0)
1391 ✗ return ret;
1392 ✗ pes->PES_packet_length = 0;
1393 ✗ max_packet_size = ts->max_packet_size;
1394 ✗ ts->stop_parse = 1;
1395
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 355945 } else if (pes->data_index == 0 &&
1396 buf_size > max_packet_size) {
1397 // pes packet size is < ts size packet and pes data is padded with 0xff
1398 // not sure if this is legal in ts but see issue #2392
1399 ✗ buf_size = max_packet_size;
1400 }
1401
1402
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 355945 if (!pes->buffer) {
1403 29074 pes->buffer = buffer_pool_get(ts, max_packet_size);
1404
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 29074 if (!pes->buffer)
1405 ✗ return AVERROR(ENOMEM);
1406 }
1407
1408 355945 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1409 355945 pes->data_index += buf_size;
1410 /* emit complete packets with known packet size
1411 * decreases demuxer delay for infrequent packets like subtitles from
1412 * a couple of seconds to milliseconds for properly muxed files. */
1413
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 355945 if (!ts->stop_parse && pes->PES_packet_length &&
1414
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 195689 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1415 25958 ts->stop_parse = 1;
1416 25958 ret = new_pes_packet(pes, ts->pkt);
1417 25958 pes->state = MPEGTS_SKIP;
1418
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 25958 if (ret < 0)
1419 ✗ return ret;
1420 }
1421 } while (0);
1422 355945 buf_size = 0;
1423 355945 break;
1424 18542 case MPEGTS_SKIP:
1425 18542 buf_size = 0;
1426 18542 break;
1427 }
1428 }
1429
1430 374489 return 0;
1431 }
1432
1433 126 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1434 {
1435 MpegTSFilter *tss;
1436 PESContext *pes;
1437
1438 /* if no pid found, then add a pid context */
1439 126 pes = av_mallocz(sizeof(PESContext));
1440
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 126 if (!pes)
1441 ✗ return 0;
1442 126 pes->ts = ts;
1443 126 pes->stream = ts->stream;
1444 126 pes->pid = pid;
1445 126 pes->pcr_pid = pcr_pid;
1446 126 pes->state = MPEGTS_SKIP;
1447 126 pes->pts = AV_NOPTS_VALUE;
1448 126 pes->dts = AV_NOPTS_VALUE;
1449 126 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1450
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 126 if (!tss) {
1451 ✗ av_free(pes);
1452 ✗ return 0;
1453 }
1454 126 return pes;
1455 }
1456
1457 #define MAX_LEVEL 4
1458 typedef struct MP4DescrParseContext {
1459 AVFormatContext *s;
1460 FFIOContext pb;
1461 Mp4Descr *descr;
1462 Mp4Descr *active_descr;
1463 int descr_count;
1464 int max_descr_count;
1465 int level;
1466 int predefined_SLConfigDescriptor_seen;
1467 } MP4DescrParseContext;
1468
1469 ✗ static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1470 const uint8_t *buf, unsigned size,
1471 Mp4Descr *descr, int max_descr_count)
1472 {
1473 ✗ if (size > (1 << 30))
1474 ✗ return AVERROR_INVALIDDATA;
1475
1476 ✗ ffio_init_read_context(&d->pb, buf, size);
1477
1478 ✗ d->s = s;
1479 ✗ d->level = 0;
1480 ✗ d->descr_count = 0;
1481 ✗ d->descr = descr;
1482 ✗ d->active_descr = NULL;
1483 ✗ d->max_descr_count = max_descr_count;
1484
1485 ✗ return 0;
1486 }
1487
1488 ✗ static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1489 {
1490 ✗ int64_t new_off = avio_tell(pb);
1491 ✗ (*len) -= new_off - *off;
1492 ✗ *off = new_off;
1493 ✗ }
1494
1495 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1496 int target_tag);
1497
1498 ✗ static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1499 {
1500 ✗ while (len > 0) {
1501 ✗ int ret = parse_mp4_descr(d, off, len, 0);
1502 ✗ if (ret < 0)
1503 ✗ return ret;
1504 ✗ update_offsets(&d->pb.pub, &off, &len);
1505 }
1506 ✗ return 0;
1507 }
1508
1509 ✗ static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1510 {
1511 ✗ AVIOContext *const pb = &d->pb.pub;
1512 ✗ avio_rb16(pb); // ID
1513 ✗ avio_r8(pb);
1514 ✗ avio_r8(pb);
1515 ✗ avio_r8(pb);
1516 ✗ avio_r8(pb);
1517 ✗ avio_r8(pb);
1518 ✗ update_offsets(pb, &off, &len);
1519 ✗ return parse_mp4_descr_arr(d, off, len);
1520 }
1521
1522 ✗ static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1523 {
1524 int id_flags;
1525 ✗ if (len < 2)
1526 ✗ return 0;
1527 ✗ id_flags = avio_rb16(&d->pb.pub);
1528 ✗ if (!(id_flags & 0x0020)) { // URL_Flag
1529 ✗ update_offsets(&d->pb.pub, &off, &len);
1530 ✗ return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1531 } else {
1532 ✗ return 0;
1533 }
1534 }
1535
1536 ✗ static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1537 {
1538 ✗ AVIOContext *const pb = &d->pb.pub;
1539 ✗ int es_id = 0;
1540 ✗ int ret = 0;
1541
1542 ✗ if (d->descr_count >= d->max_descr_count)
1543 ✗ return AVERROR_INVALIDDATA;
1544 ✗ ff_mp4_parse_es_descr(pb, &es_id);
1545 ✗ d->active_descr = d->descr + (d->descr_count++);
1546
1547 ✗ d->active_descr->es_id = es_id;
1548 ✗ update_offsets(pb, &off, &len);
1549 ✗ if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1550 ✗ return ret;
1551 ✗ update_offsets(pb, &off, &len);
1552 ✗ if (len > 0)
1553 ✗ ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1554 ✗ d->active_descr = NULL;
1555 ✗ return ret;
1556 }
1557
1558 ✗ static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1559 int len)
1560 {
1561 ✗ Mp4Descr *descr = d->active_descr;
1562 ✗ if (!descr)
1563 ✗ return AVERROR_INVALIDDATA;
1564 ✗ d->active_descr->dec_config_descr = av_malloc(len);
1565 ✗ if (!descr->dec_config_descr)
1566 ✗ return AVERROR(ENOMEM);
1567 ✗ descr->dec_config_descr_len = len;
1568 ✗ avio_read(&d->pb.pub, descr->dec_config_descr, len);
1569 ✗ return 0;
1570 }
1571
1572 ✗ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1573 {
1574 ✗ Mp4Descr *descr = d->active_descr;
1575 ✗ AVIOContext *const pb = &d->pb.pub;
1576 int predefined;
1577 ✗ if (!descr)
1578 ✗ return AVERROR_INVALIDDATA;
1579
1580 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1581 descr->sl.dst = avio_r8(pb); \
1582 if (descr->sl.dst > maxv) { \
1583 descr->sl.dst = maxv; \
1584 return AVERROR_INVALIDDATA; \
1585 } \
1586 } while (0)
1587
1588 ✗ predefined = avio_r8(pb);
1589 ✗ if (!predefined) {
1590 int lengths;
1591 ✗ int flags = avio_r8(pb);
1592 ✗ descr->sl.use_au_start = !!(flags & 0x80);
1593 ✗ descr->sl.use_au_end = !!(flags & 0x40);
1594 ✗ descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1595 ✗ descr->sl.use_padding = !!(flags & 0x08);
1596 ✗ descr->sl.use_timestamps = !!(flags & 0x04);
1597 ✗ descr->sl.use_idle = !!(flags & 0x02);
1598 ✗ descr->sl.timestamp_res = avio_rb32(pb);
1599 ✗ avio_rb32(pb);
1600 ✗ R8_CHECK_CLIP_MAX(timestamp_len, 63);
1601 ✗ R8_CHECK_CLIP_MAX(ocr_len, 63);
1602 ✗ R8_CHECK_CLIP_MAX(au_len, 31);
1603 ✗ descr->sl.inst_bitrate_len = avio_r8(pb);
1604 ✗ lengths = avio_rb16(pb);
1605 ✗ descr->sl.degr_prior_len = lengths >> 12;
1606 ✗ descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1607 ✗ descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1608 ✗ } else if (!d->predefined_SLConfigDescriptor_seen){
1609 ✗ avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1610 ✗ d->predefined_SLConfigDescriptor_seen = 1;
1611 }
1612 ✗ return 0;
1613 }
1614
1615 ✗ static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1616 int target_tag)
1617 {
1618 int tag;
1619 ✗ AVIOContext *const pb = &d->pb.pub;
1620 ✗ int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1621 ✗ int ret = 0;
1622
1623 ✗ update_offsets(pb, &off, &len);
1624 ✗ if (len < 0 || len1 > len || len1 <= 0) {
1625 ✗ av_log(d->s, AV_LOG_ERROR,
1626 "Tag %x length violation new length %d bytes remaining %d\n",
1627 tag, len1, len);
1628 ✗ return AVERROR_INVALIDDATA;
1629 }
1630
1631 ✗ if (d->level++ >= MAX_LEVEL) {
1632 ✗ av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1633 ✗ ret = AVERROR_INVALIDDATA;
1634 ✗ goto done;
1635 }
1636
1637 ✗ if (target_tag && tag != target_tag) {
1638 ✗ av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1639 target_tag);
1640 ✗ ret = AVERROR_INVALIDDATA;
1641 ✗ goto done;
1642 }
1643
1644 ✗ switch (tag) {
1645 ✗ case MP4IODescrTag:
1646 ✗ ret = parse_MP4IODescrTag(d, off, len1);
1647 ✗ break;
1648 ✗ case MP4ODescrTag:
1649 ✗ ret = parse_MP4ODescrTag(d, off, len1);
1650 ✗ break;
1651 ✗ case MP4ESDescrTag:
1652 ✗ ret = parse_MP4ESDescrTag(d, off, len1);
1653 ✗ break;
1654 ✗ case MP4DecConfigDescrTag:
1655 ✗ ret = parse_MP4DecConfigDescrTag(d, off, len1);
1656 ✗ break;
1657 ✗ case MP4SLDescrTag:
1658 ✗ ret = parse_MP4SLDescrTag(d, off, len1);
1659 ✗ break;
1660 }
1661
1662
1663 ✗ done:
1664 ✗ d->level--;
1665 ✗ avio_seek(pb, off + len1, SEEK_SET);
1666 ✗ return ret;
1667 }
1668
1669 ✗ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1670 Mp4Descr *descr, int *descr_count, int max_descr_count)
1671 {
1672 MP4DescrParseContext d;
1673 int ret;
1674
1675 ✗ d.predefined_SLConfigDescriptor_seen = 0;
1676
1677 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1678 ✗ if (ret < 0)
1679 ✗ return ret;
1680
1681 ✗ ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1682
1683 ✗ *descr_count = d.descr_count;
1684 ✗ return ret;
1685 }
1686
1687 ✗ static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1688 Mp4Descr *descr, int *descr_count, int max_descr_count)
1689 {
1690 MP4DescrParseContext d;
1691 int ret;
1692
1693 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1694 ✗ if (ret < 0)
1695 ✗ return ret;
1696
1697 ✗ ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1698
1699 ✗ *descr_count = d.descr_count;
1700 ✗ return ret;
1701 }
1702
1703 ✗ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1704 int section_len)
1705 {
1706 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1707 ✗ MpegTSSectionFilter *tssf = &filter->u.section_filter;
1708 SectionHeader h;
1709 const uint8_t *p, *p_end;
1710 ✗ int mp4_descr_count = 0;
1711 ✗ Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1712 int i, pid;
1713 ✗ AVFormatContext *s = ts->stream;
1714
1715 ✗ p_end = section + section_len - 4;
1716 ✗ p = section;
1717 ✗ if (parse_section_header(&h, &p, p_end) < 0)
1718 ✗ return;
1719 ✗ if (h.tid != M4OD_TID)
1720 ✗ return;
1721 ✗ if (skip_identical(&h, tssf))
1722 ✗ return;
1723
1724 ✗ mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1725 MAX_MP4_DESCR_COUNT);
1726
1727 ✗ for (pid = 0; pid < NB_PID_MAX; pid++) {
1728 ✗ if (!ts->pids[pid])
1729 ✗ continue;
1730 ✗ for (i = 0; i < mp4_descr_count; i++) {
1731 PESContext *pes;
1732 AVStream *st;
1733 FFStream *sti;
1734 FFIOContext pb;
1735 ✗ if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1736 ✗ continue;
1737 ✗ if (ts->pids[pid]->type != MPEGTS_PES) {
1738 ✗ av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1739 ✗ continue;
1740 }
1741 ✗ pes = ts->pids[pid]->u.pes_filter.opaque;
1742 ✗ st = pes->st;
1743 ✗ if (!st)
1744 ✗ continue;
1745 ✗ sti = ffstream(st);
1746
1747 ✗ pes->sl = mp4_descr[i].sl;
1748
1749 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1750 mp4_descr[i].dec_config_descr_len);
1751 ✗ ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1752 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1753 ✗ st->codecpar->extradata_size > 0)
1754 ✗ sti->need_parsing = 0;
1755 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1756 ✗ st->codecpar->extradata_size > 0)
1757 ✗ sti->need_parsing = 0;
1758
1759 ✗ st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1760 ✗ sti->need_context_update = 1;
1761 }
1762 }
1763 ✗ for (i = 0; i < mp4_descr_count; i++)
1764 ✗ av_free(mp4_descr[i].dec_config_descr);
1765 }
1766
1767 ✗ static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1768 int section_len)
1769 {
1770 ✗ AVProgram *prg = NULL;
1771 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1772
1773 ✗ int idx = ff_find_stream_index(ts->stream, filter->pid);
1774 ✗ if (idx < 0)
1775 ✗ return;
1776
1777 /**
1778 * In case we receive an SCTE-35 packet before mpegts context is fully
1779 * initialized.
1780 */
1781 ✗ if (!ts->pkt)
1782 ✗ return;
1783
1784 ✗ new_data_packet(section, section_len, ts->pkt);
1785 ✗ ts->pkt->stream_index = idx;
1786 ✗ prg = av_find_program_from_stream(ts->stream, NULL, idx);
1787 ✗ if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1788 ✗ MpegTSFilter *f = ts->pids[prg->pcr_pid];
1789 ✗ if (f && f->last_pcr != -1)
1790 ✗ ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1791 }
1792 ✗ ts->stop_parse = 1;
1793
1794 }
1795
1796 static const uint8_t opus_coupled_stream_cnt[9] = {
1797 1, 0, 1, 1, 2, 2, 2, 3, 3
1798 };
1799
1800 static const uint8_t opus_stream_cnt[9] = {
1801 1, 1, 1, 2, 2, 3, 4, 4, 5,
1802 };
1803
1804 static const uint8_t opus_channel_map[8][8] = {
1805 { 0 },
1806 { 0,1 },
1807 { 0,2,1 },
1808 { 0,1,2,3 },
1809 { 0,4,1,2,3 },
1810 { 0,4,1,2,3,5 },
1811 { 0,4,1,2,3,5,6 },
1812 { 0,6,1,2,3,4,5,7 },
1813 };
1814
1815 933 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1816 const uint8_t **pp, const uint8_t *desc_list_end,
1817 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1818 MpegTSContext *ts)
1819 {
1820 933 FFStream *const sti = ffstream(st);
1821 const uint8_t *desc_end;
1822 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1823 char language[252];
1824 int i;
1825
1826 933 desc_tag = get8(pp, desc_list_end);
1827
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 933 if (desc_tag < 0)
1828 559 return AVERROR_INVALIDDATA;
1829 374 desc_len = get8(pp, desc_list_end);
1830
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 374 if (desc_len < 0)
1831 ✗ return AVERROR_INVALIDDATA;
1832 374 desc_end = *pp + desc_len;
1833
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 374 if (desc_end > desc_list_end)
1834 ✗ return AVERROR_INVALIDDATA;
1835
1836 374 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1837
1838
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 374 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1839 stream_type == STREAM_TYPE_PRIVATE_DATA)
1840 12 mpegts_find_stream_type(st, desc_tag, DESC_types);
1841
1842
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 374 switch (desc_tag) {
1843 ✗ case VIDEO_STREAM_DESCRIPTOR:
1844 ✗ if (get8(pp, desc_end) & 0x1) {
1845 ✗ st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1846 }
1847 ✗ break;
1848 ✗ case SL_DESCRIPTOR:
1849 ✗ desc_es_id = get16(pp, desc_end);
1850 ✗ if (desc_es_id < 0)
1851 ✗ break;
1852 ✗ if (ts && ts->pids[pid])
1853 ✗ ts->pids[pid]->es_id = desc_es_id;
1854 ✗ for (i = 0; i < mp4_descr_count; i++)
1855 ✗ if (mp4_descr[i].dec_config_descr_len &&
1856 ✗ mp4_descr[i].es_id == desc_es_id) {
1857 FFIOContext pb;
1858 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1859 ✗ mp4_descr[i].dec_config_descr_len);
1860 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1861 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1862 ✗ st->codecpar->extradata_size > 0) {
1863 ✗ sti->need_parsing = 0;
1864 ✗ sti->need_context_update = 1;
1865 }
1866 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1867 ✗ mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1868 }
1869 ✗ break;
1870 ✗ case FMC_DESCRIPTOR:
1871 ✗ if (get16(pp, desc_end) < 0)
1872 ✗ break;
1873 ✗ if (mp4_descr_count > 0 &&
1874 ✗ (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1875 ✗ (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1876 ✗ sti->request_probe > 0) &&
1877 ✗ mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1878 FFIOContext pb;
1879 ✗ ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1880 mp4_descr->dec_config_descr_len);
1881 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1882 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1883 ✗ st->codecpar->extradata_size > 0) {
1884 ✗ sti->request_probe = sti->need_parsing = 0;
1885 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1886 ✗ sti->need_context_update = 1;
1887 }
1888 }
1889 ✗ break;
1890 ✗ case 0x56: /* DVB teletext descriptor */
1891 {
1892 ✗ uint8_t *extradata = NULL;
1893 ✗ int language_count = desc_len / 5, ret;
1894
1895 ✗ if (desc_len > 0 && desc_len % 5 != 0)
1896 ✗ return AVERROR_INVALIDDATA;
1897
1898 ✗ if (language_count > 0) {
1899 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1900 ✗ av_assert0(language_count <= sizeof(language) / 4);
1901
1902 ✗ if (st->codecpar->extradata == NULL) {
1903 ✗ ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1904 ✗ if (ret < 0)
1905 ✗ return ret;
1906 }
1907
1908 ✗ if (st->codecpar->extradata_size < language_count * 2)
1909 ✗ return AVERROR_INVALIDDATA;
1910
1911 ✗ extradata = st->codecpar->extradata;
1912
1913 ✗ for (i = 0; i < language_count; i++) {
1914 ✗ language[i * 4 + 0] = get8(pp, desc_end);
1915 ✗ language[i * 4 + 1] = get8(pp, desc_end);
1916 ✗ language[i * 4 + 2] = get8(pp, desc_end);
1917 ✗ language[i * 4 + 3] = ',';
1918
1919 ✗ memcpy(extradata, *pp, 2);
1920 ✗ extradata += 2;
1921
1922 ✗ *pp += 2;
1923 }
1924
1925 ✗ language[i * 4 - 1] = 0;
1926 ✗ av_dict_set(&st->metadata, "language", language, 0);
1927 ✗ sti->need_context_update = 1;
1928 }
1929 }
1930 ✗ break;
1931 9 case 0x59: /* subtitling descriptor */
1932 {
1933 /* 8 bytes per DVB subtitle substream data:
1934 * ISO_639_language_code (3 bytes),
1935 * subtitling_type (1 byte),
1936 * composition_page_id (2 bytes),
1937 * ancillary_page_id (2 bytes) */
1938 9 int language_count = desc_len / 8, ret;
1939
1940
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 9 if (desc_len > 0 && desc_len % 8 != 0)
1941 ✗ return AVERROR_INVALIDDATA;
1942
1943
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 9 if (language_count > 1) {
1944 ✗ avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1945 }
1946
1947
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 9 if (language_count > 0) {
1948 uint8_t *extradata;
1949
1950 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1951
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 9 av_assert0(language_count <= sizeof(language) / 4);
1952
1953
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 9 if (st->codecpar->extradata == NULL) {
1954 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1955
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 3 if (ret < 0)
1956 ✗ return ret;
1957 }
1958
1959
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 9 if (st->codecpar->extradata_size < language_count * 5)
1960 ✗ return AVERROR_INVALIDDATA;
1961
1962 9 extradata = st->codecpar->extradata;
1963
1964
2/2
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 18 for (i = 0; i < language_count; i++) {
1965 9 language[i * 4 + 0] = get8(pp, desc_end);
1966 9 language[i * 4 + 1] = get8(pp, desc_end);
1967 9 language[i * 4 + 2] = get8(pp, desc_end);
1968 9 language[i * 4 + 3] = ',';
1969
1970 /* hearing impaired subtitles detection using subtitling_type */
1971
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 9 switch (*pp[0]) {
1972 ✗ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1973 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1974 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1975 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1976 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1977 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1978 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1979 ✗ break;
1980 }
1981
1982 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1983 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1984 9 extradata += 5;
1985
1986 9 *pp += 4;
1987 }
1988
1989 9 language[i * 4 - 1] = 0;
1990 9 av_dict_set(&st->metadata, "language", language, 0);
1991 9 sti->need_context_update = 1;
1992 }
1993 }
1994 9 break;
1995 252 case ISO_639_LANGUAGE_DESCRIPTOR:
1996
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 498 for (i = 0; i + 4 <= desc_len; i += 4) {
1997 246 language[i + 0] = get8(pp, desc_end);
1998 246 language[i + 1] = get8(pp, desc_end);
1999 246 language[i + 2] = get8(pp, desc_end);
2000 246 language[i + 3] = ',';
2001
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 246 switch (get8(pp, desc_end)) {
2002 ✗ case 0x01:
2003 ✗ st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2004 ✗ break;
2005 ✗ case 0x02:
2006 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2007 ✗ break;
2008 60 case 0x03:
2009 60 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2010 60 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2011 60 break;
2012 }
2013 }
2014
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 252 if (i && language[0]) {
2015 242 language[i - 1] = 0;
2016 /* don't overwrite language, as it may already have been set by
2017 * another, more specific descriptor (e.g. supplementary audio) */
2018 242 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2019 }
2020 252 break;
2021 8 case REGISTRATION_DESCRIPTOR:
2022 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2023 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2024
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 8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2025 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2026
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 3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2027 2 sti->request_probe = 50;
2028 }
2029 8 break;
2030 31 case 0x52: /* stream identifier descriptor */
2031 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2032 31 break;
2033 4 case METADATA_DESCRIPTOR:
2034
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✗ Branch 2 not taken.
 4 if (get16(pp, desc_end) == 0xFFFF)
2035 4 *pp += 4;
2036
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 4 if (get8(pp, desc_end) == 0xFF) {
2037 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2038
2/2
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2039 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2040 }
2041 4 break;
2042 4 case 0x7f: /* DVB extension descriptor */
2043 4 ext_desc_tag = get8(pp, desc_end);
2044
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 4 if (ext_desc_tag < 0)
2045 ✗ return AVERROR_INVALIDDATA;
2046
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✗ Branch 3 not taken.
 4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2047 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2048
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 3 if (!st->codecpar->extradata) {
2049 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2050 AV_INPUT_BUFFER_PADDING_SIZE);
2051
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 1 if (!st->codecpar->extradata)
2052 ✗ return AVERROR(ENOMEM);
2053
2054 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2055 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2056
2057 1 channel_config_code = get8(pp, desc_end);
2058
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 1 if (channel_config_code < 0)
2059 ✗ return AVERROR_INVALIDDATA;
2060
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 1 if (channel_config_code <= 0x8) {
2061
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 1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2062 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2063
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 1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2064 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2065 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2066 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2067
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 1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2068 } else {
2069 ✗ avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2070 }
2071 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2072 1 sti->need_context_update = 1;
2073 }
2074 }
2075
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 4 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2076 int flags;
2077
2078 ✗ if (desc_len < 1)
2079 ✗ return AVERROR_INVALIDDATA;
2080 ✗ flags = get8(pp, desc_end);
2081
2082 ✗ if ((flags & 0x80) == 0) /* mix_type */
2083 ✗ st->disposition |= AV_DISPOSITION_DEPENDENT;
2084
2085 ✗ switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2086 ✗ case 0x01:
2087 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2088 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2089 ✗ break;
2090 ✗ case 0x02:
2091 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2092 ✗ break;
2093 ✗ case 0x03:
2094 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2095 ✗ break;
2096 }
2097
2098 ✗ if (flags & 0x01) { /* language_code_present */
2099 ✗ if (desc_len < 4)
2100 ✗ return AVERROR_INVALIDDATA;
2101 ✗ language[0] = get8(pp, desc_end);
2102 ✗ language[1] = get8(pp, desc_end);
2103 ✗ language[2] = get8(pp, desc_end);
2104 ✗ language[3] = 0;
2105
2106 /* This language always has to override a possible
2107 * ISO 639 language descriptor language */
2108 ✗ if (language[0])
2109 ✗ av_dict_set(&st->metadata, "language", language, 0);
2110 }
2111 }
2112 4 break;
2113 6 case 0x6a: /* ac-3_descriptor */
2114 {
2115 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2116
1/2
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✓ Branch 1 taken 6 times.
 6 if (component_type_flag) {
2117 ✗ int component_type = get8(pp, desc_end);
2118 ✗ int service_type_mask = 0x38; // 0b00111000
2119 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2120 ✗ if (service_type == 0x02 /* 0b010 */) {
2121 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2122 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2123 }
2124 }
2125 }
2126 6 break;
2127 ✗ case 0x7a: /* enhanced_ac-3_descriptor */
2128 {
2129 ✗ int component_type_flag = get8(pp, desc_end) & (1 << 7);
2130 ✗ if (component_type_flag) {
2131 ✗ int component_type = get8(pp, desc_end);
2132 ✗ int service_type_mask = 0x38; // 0b00111000
2133 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2134 ✗ if (service_type == 0x02 /* 0b010 */) {
2135 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2136 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2137 }
2138 }
2139 }
2140 ✗ break;
2141 ✗ case 0xfd: /* ARIB data coding type descriptor */
2142 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2143 // for captions
2144 ✗ if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2145 // This structure is defined in STD-B10, part 1, listing 5.4 and
2146 // part 2, 6.2.20).
2147 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2148 // Component tag limits are documented in TR-B14, fascicle 2,
2149 // Vol. 3, Section 2, 4.2.8.1
2150 ✗ int actual_component_tag = sti->stream_identifier - 1;
2151 ✗ int picked_profile = AV_PROFILE_UNKNOWN;
2152 ✗ int data_component_id = get16(pp, desc_end);
2153 ✗ if (data_component_id < 0)
2154 ✗ return AVERROR_INVALIDDATA;
2155
2156 ✗ switch (data_component_id) {
2157 ✗ case 0x0008:
2158 // [0x30..0x37] are component tags utilized for
2159 // non-mobile captioning service ("profile A").
2160 ✗ if (actual_component_tag >= 0x30 &&
2161 actual_component_tag <= 0x37) {
2162 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2163 }
2164 ✗ break;
2165 ✗ case 0x0012:
2166 // component tag 0x87 signifies a mobile/partial reception
2167 // (1seg) captioning service ("profile C").
2168 ✗ if (actual_component_tag == 0x87) {
2169 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_C;
2170 }
2171 ✗ break;
2172 ✗ default:
2173 ✗ break;
2174 }
2175
2176 ✗ if (picked_profile == AV_PROFILE_UNKNOWN)
2177 ✗ break;
2178
2179 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2180 ✗ st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2181 ✗ if (st->codecpar->profile != picked_profile) {
2182 ✗ st->codecpar->profile = picked_profile;
2183 ✗ sti->need_context_update = 1;
2184 }
2185 ✗ sti->request_probe = 0;
2186 ✗ sti->need_parsing = 0;
2187 }
2188 ✗ break;
2189 ✗ case 0xb0: /* DOVI video stream descriptor */
2190 {
2191 uint32_t buf;
2192 AVDOVIDecoderConfigurationRecord *dovi;
2193 size_t dovi_size;
2194 ✗ int dependency_pid = -1; // Unset
2195
2196 ✗ if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2197 ✗ return AVERROR_INVALIDDATA;
2198
2199 ✗ dovi = av_dovi_alloc(&dovi_size);
2200 ✗ if (!dovi)
2201 ✗ return AVERROR(ENOMEM);
2202
2203 ✗ dovi->dv_version_major = get8(pp, desc_end);
2204 ✗ dovi->dv_version_minor = get8(pp, desc_end);
2205 ✗ buf = get16(pp, desc_end);
2206 ✗ dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2207 ✗ dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2208 ✗ dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2209 ✗ dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2210 ✗ dovi->bl_present_flag = buf & 0x01; // 1 bit
2211 ✗ if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
2212 ✗ buf = get16(pp, desc_end);
2213 ✗ dependency_pid = buf >> 3; // 13 bits
2214 }
2215 ✗ if (desc_end - *pp >= 1) { // 8 bits
2216 ✗ buf = get8(pp, desc_end);
2217 ✗ dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2218 ✗ dovi->dv_md_compression = (buf >> 2) & 0x03; // 2 bits
2219 } else {
2220 // 0 stands for None
2221 // Dolby Vision V1.2.93 profiles and levels
2222 ✗ dovi->dv_bl_signal_compatibility_id = 0;
2223 ✗ dovi->dv_md_compression = AV_DOVI_COMPRESSION_NONE;
2224 }
2225
2226 ✗ if (!av_packet_side_data_add(&st->codecpar->coded_side_data,
2227 ✗ &st->codecpar->nb_coded_side_data,
2228 AV_PKT_DATA_DOVI_CONF,
2229 (uint8_t *)dovi, dovi_size, 0)) {
2230 ✗ av_free(dovi);
2231 ✗ return AVERROR(ENOMEM);
2232 }
2233
2234 ✗ av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2235 "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, "
2236 "compatibility id: %d, compression: %d\n",
2237 ✗ dovi->dv_version_major, dovi->dv_version_minor,
2238 ✗ dovi->dv_profile, dovi->dv_level,
2239 ✗ dovi->rpu_present_flag,
2240 ✗ dovi->el_present_flag,
2241 ✗ dovi->bl_present_flag,
2242 dependency_pid,
2243 ✗ dovi->dv_bl_signal_compatibility_id,
2244 ✗ dovi->dv_md_compression);
2245 }
2246 ✗ break;
2247 60 default:
2248 60 break;
2249 }
2250 374 *pp = desc_end;
2251 374 return 0;
2252 }
2253
2254 12 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2255 int stream_identifier, int pmt_stream_idx, struct Program *p)
2256 {
2257 12 AVFormatContext *s = ts->stream;
2258 12 AVStream *found = NULL;
2259
2260
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✓ Branch 1 taken 12 times.
 12 if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2261 ✗ for (int i = 0; i < p->nb_streams; i++) {
2262 ✗ if (p->streams[i].stream_identifier == stream_identifier)
2263 ✗ if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2264 ✗ found = s->streams[p->streams[i].idx];
2265 }
2266
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 12 } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2267 7 found = s->streams[p->streams[pmt_stream_idx].idx];
2268 }
2269
2270
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 12 if (found) {
2271 7 av_log(ts->stream, AV_LOG_VERBOSE,
2272 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2273 7 av_get_media_type_string(found->codecpar->codec_type),
2274 found->index, found->id, pid);
2275 }
2276
2277 12 return found;
2278 }
2279
2280 559 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2281 {
2282 559 const uint8_t **pp = &p;
2283 const uint8_t *desc_list_end;
2284 const uint8_t *desc_end;
2285 int desc_list_len;
2286 int desc_len, desc_tag;
2287
2288 559 desc_list_len = get16(pp, p_end);
2289
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✓ Branch 1 taken 559 times.
 559 if (desc_list_len < 0)
2290 ✗ return -1;
2291 559 desc_list_len &= 0xfff;
2292 559 desc_list_end = p + desc_list_len;
2293
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✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2294 ✗ return -1;
2295
2296 while (1) {
2297 893 desc_tag = get8(pp, desc_list_end);
2298
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 893 if (desc_tag < 0)
2299 531 return -1;
2300 362 desc_len = get8(pp, desc_list_end);
2301
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✓ Branch 1 taken 362 times.
 362 if (desc_len < 0)
2302 ✗ return -1;
2303 362 desc_end = *pp + desc_len;
2304
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 362 if (desc_end > desc_list_end)
2305 ✗ return -1;
2306
2307
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✓ Branch 1 taken 334 times.
 362 if (desc_tag == 0x52) {
2308 28 return get8(pp, desc_end);
2309 }
2310 334 *pp = desc_end;
2311 }
2312
2313 return -1;
2314 }
2315
2316 139 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2317 {
2318
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 169 return !(stream_type == 0x13 ||
2319
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 30 (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) );
2320 }
2321
2322 2982 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2323 {
2324 2982 MpegTSContext *ts = filter->u.section_filter.opaque;
2325 2982 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2326 struct Program old_program;
2327 2982 SectionHeader h1, *h = &h1;
2328 PESContext *pes;
2329 AVStream *st;
2330 const uint8_t *p, *p_end, *desc_list_end;
2331 int program_info_length, pcr_pid, pid, stream_type;
2332 int desc_list_len;
2333 2982 uint32_t prog_reg_desc = 0; /* registration descriptor */
2334 2982 int stream_identifier = -1;
2335 struct Program *prg;
2336
2337 2982 int mp4_descr_count = 0;
2338 2982 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2339 int i;
2340
2341 2982 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2342 hex_dump_debug(ts->stream, section, section_len);
2343
2344 2982 p_end = section + section_len - 4;
2345 2982 p = section;
2346
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 2982 times.
 2982 if (parse_section_header(h, &p, p_end) < 0)
2347 2711 return;
2348
2/2
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✓ Branch 1 taken 2907 times.
 2982 if (h->tid != PMT_TID)
2349 75 return;
2350
1/2
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 2907 if (!h->current_next)
2351 ✗ return;
2352
2/2
✓ Branch 1 taken 2636 times.
✓ Branch 2 taken 271 times.
 2907 if (skip_identical(h, tssf))
2353 2636 return;
2354
2355 271 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2356 271 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2357
2358
1/4
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (!ts->scan_all_pmts && ts->skip_changes)
2359 ✗ return;
2360
2361 271 prg = get_program(ts, h->id);
2362
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (prg)
2363 271 old_program = *prg;
2364 else
2365 ✗ clear_program(&old_program);
2366
2367
1/4
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (ts->skip_unknown_pmt && !prg)
2368 ✗ return;
2369
3/6
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✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 271 times.
 271 if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2370 ✗ return;
2371
2/2
✓ Branch 0 taken 172 times.
✓ Branch 1 taken 99 times.
 271 if (!ts->skip_clear)
2372 172 clear_avprogram(ts, h->id);
2373 271 clear_program(prg);
2374 271 add_pid_to_program(prg, ts->current_pid);
2375
2376 271 pcr_pid = get16(&p, p_end);
2377
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (pcr_pid < 0)
2378 ✗ return;
2379 271 pcr_pid &= 0x1fff;
2380 271 add_pid_to_program(prg, pcr_pid);
2381 271 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2382
2383 271 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2384
2385 271 program_info_length = get16(&p, p_end);
2386
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (program_info_length < 0)
2387 ✗ return;
2388 271 program_info_length &= 0xfff;
2389
2/2
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✓ Branch 1 taken 271 times.
 517 while (program_info_length >= 2) {
2390 uint8_t tag, len;
2391 246 tag = get8(&p, p_end);
2392 246 len = get8(&p, p_end);
2393
2394 246 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2395
2396 246 program_info_length -= 2;
2397
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (len > program_info_length)
2398 // something else is broken, exit the program_descriptors_loop
2399 ✗ break;
2400 246 program_info_length -= len;
2401
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (tag == IOD_DESCRIPTOR) {
2402 ✗ get8(&p, p_end); // scope
2403 ✗ get8(&p, p_end); // label
2404 ✗ len -= 2;
2405 ✗ mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2406 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2407
3/4
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✓ Branch 1 taken 126 times.
✓ Branch 2 taken 120 times.
✗ Branch 3 not taken.
 246 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2408 120 prog_reg_desc = bytestream_get_le32(&p);
2409 120 len -= 4;
2410 }
2411 246 p += len;
2412 }
2413 271 p += program_info_length;
2414
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (p >= p_end)
2415 ✗ goto out;
2416
2417 // stop parsing after pmt, we found header
2418
2/2
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✓ Branch 1 taken 216 times.
 271 if (!ts->pkt)
2419 55 ts->stop_parse = 2;
2420
2421
1/2
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✗ Branch 1 not taken.
 271 if (prg)
2422 271 prg->pmt_found = 1;
2423
2424
1/2
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✗ Branch 1 not taken.
 830 for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2425 830 st = 0;
2426 830 pes = NULL;
2427 830 stream_type = get8(&p, p_end);
2428
2/2
✓ Branch 0 taken 271 times.
✓ Branch 1 taken 559 times.
 830 if (stream_type < 0)
2429 271 break;
2430 559 pid = get16(&p, p_end);
2431
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid < 0)
2432 ✗ goto out;
2433 559 pid &= 0x1fff;
2434
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid == ts->current_pid)
2435 ✗ goto out;
2436
2437 559 stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2438
2439 /* now create stream */
2440
4/4
✓ Branch 0 taken 440 times.
✓ Branch 1 taken 119 times.
✓ Branch 2 taken 420 times.
✓ Branch 3 taken 20 times.
 559 if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) {
2441 420 pes = ts->pids[pid]->u.pes_filter.opaque;
2442
3/4
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✓ Branch 1 taken 404 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 16 times.
 420 if (ts->merge_pmt_versions && !pes->st) {
2443 ✗ st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2444 ✗ if (st) {
2445 ✗ pes->st = st;
2446 ✗ pes->stream_type = stream_type;
2447 ✗ pes->merged_st = 1;
2448 }
2449 }
2450
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 420 times.
 420 if (!pes->st) {
2451 ✗ pes->st = avformat_new_stream(pes->stream, NULL);
2452 ✗ if (!pes->st)
2453 ✗ goto out;
2454 ✗ pes->st->id = pes->pid;
2455 }
2456 420 st = pes->st;
2457
2/2
✓ Branch 1 taken 109 times.
✓ Branch 2 taken 30 times.
 139 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2458
1/2
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✓ Branch 1 taken 109 times.
 109 if (ts->pids[pid])
2459 ✗ mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2460 109 pes = add_pes_stream(ts, pid, pcr_pid);
2461
4/6
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✓ Branch 2 taken 8 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 8 times.
✗ Branch 5 not taken.
 109 if (ts->merge_pmt_versions && pes && !pes->st) {
2462 8 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2463
2/2
✓ Branch 0 taken 4 times.
✓ Branch 1 taken 4 times.
 8 if (st) {
2464 4 pes->st = st;
2465 4 pes->stream_type = stream_type;
2466 4 pes->merged_st = 1;
2467 }
2468 }
2469
3/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 105 times.
✓ Branch 3 taken 4 times.
 109 if (pes && !pes->st) {
2470 105 st = avformat_new_stream(pes->stream, NULL);
2471
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 105 times.
 105 if (!st)
2472 ✗ goto out;
2473 105 st->id = pes->pid;
2474 }
2475 } else {
2476 30 int idx = ff_find_stream_index(ts->stream, pid);
2477
2/2
✓ Branch 0 taken 20 times.
✓ Branch 1 taken 10 times.
 30 if (idx >= 0) {
2478 20 st = ts->stream->streams[idx];
2479 }
2480
4/4
✓ Branch 0 taken 6 times.
✓ Branch 1 taken 24 times.
✓ Branch 2 taken 4 times.
✓ Branch 3 taken 2 times.
 30 if (ts->merge_pmt_versions && !st) {
2481 4 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2482 }
2483
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 23 times.
 30 if (!st) {
2484 7 st = avformat_new_stream(ts->stream, NULL);
2485
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 7 times.
 7 if (!st)
2486 ✗ goto out;
2487 7 st->id = pid;
2488 7 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2489
2/4
✓ Branch 0 taken 7 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 7 times.
✗ Branch 3 not taken.
 7 if (stream_type == 0x86 && prog_reg_desc == AV_RL32("CUEI")) {
2490 7 mpegts_find_stream_type(st, stream_type, SCTE_types);
2491 7 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2492 }
2493 }
2494 }
2495
2496
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (!st)
2497 ✗ goto out;
2498
2499
4/4
✓ Branch 0 taken 529 times.
✓ Branch 1 taken 30 times.
✓ Branch 2 taken 105 times.
✓ Branch 3 taken 424 times.
 559 if (pes && !pes->stream_type)
2500 105 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2501
2502 559 add_pid_to_program(prg, pid);
2503
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (prg) {
2504 559 prg->streams[i].idx = st->index;
2505 559 prg->streams[i].stream_identifier = stream_identifier;
2506 559 prg->nb_streams++;
2507 }
2508
2509 559 av_program_add_stream_index(ts->stream, h->id, st->index);
2510
2511 559 desc_list_len = get16(&p, p_end);
2512
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (desc_list_len < 0)
2513 ✗ goto out;
2514 559 desc_list_len &= 0xfff;
2515 559 desc_list_end = p + desc_list_len;
2516
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2517 ✗ goto out;
2518 for (;;) {
2519
2/2
✓ Branch 1 taken 559 times.
✓ Branch 2 taken 370 times.
 929 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2520 desc_list_end, mp4_descr,
2521 mp4_descr_count, pid, ts) < 0)
2522 559 break;
2523
2524
2/6
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✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 370 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 370 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2525 ✗ stream_type == 0x83 && pes->sub_st) {
2526 ✗ av_program_add_stream_index(ts->stream, h->id,
2527 ✗ pes->sub_st->index);
2528 ✗ pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2529 }
2530 }
2531 559 p = desc_list_end;
2532 }
2533
2534
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (!ts->pids[pcr_pid])
2535 ✗ mpegts_open_pcr_filter(ts, pcr_pid);
2536
2537 271 out:
2538
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 for (i = 0; i < mp4_descr_count; i++)
2539 ✗ av_free(mp4_descr[i].dec_config_descr);
2540 }
2541
2542 3009 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2543 {
2544 3009 MpegTSContext *ts = filter->u.section_filter.opaque;
2545 3009 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2546 3009 SectionHeader h1, *h = &h1;
2547 const uint8_t *p, *p_end;
2548 int sid, pmt_pid;
2549 3009 int nb_prg = 0;
2550 AVProgram *program;
2551
2552 3009 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2553 hex_dump_debug(ts->stream, section, section_len);
2554
2555 3009 p_end = section + section_len - 4;
2556 3009 p = section;
2557
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3009 times.
 3009 if (parse_section_header(h, &p, p_end) < 0)
2558 2796 return;
2559
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3009 times.
 3009 if (h->tid != PAT_TID)
2560 ✗ return;
2561
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3009 times.
 3009 if (!h->current_next)
2562 ✗ return;
2563
2/2
✓ Branch 0 taken 536 times.
✓ Branch 1 taken 2473 times.
 3009 if (ts->skip_changes)
2564 536 return;
2565
2566
2/2
✓ Branch 1 taken 2260 times.
✓ Branch 2 taken 213 times.
 2473 if (skip_identical(h, tssf))
2567 2260 return;
2568 213 ts->id = h->id;
2569
2570 for (;;) {
2571 426 sid = get16(&p, p_end);
2572
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 if (sid < 0)
2573 213 break;
2574 213 pmt_pid = get16(&p, p_end);
2575
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid < 0)
2576 ✗ break;
2577 213 pmt_pid &= 0x1fff;
2578
2579
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid == ts->current_pid)
2580 ✗ break;
2581
2582 213 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2583
2584
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid == 0x0000) {
2585 /* NIT info */
2586 } else {
2587 213 MpegTSFilter *fil = ts->pids[pmt_pid];
2588 struct Program *prg;
2589 213 program = av_new_program(ts->stream, sid);
2590
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (program) {
2591 213 program->program_num = sid;
2592 213 program->pmt_pid = pmt_pid;
2593 }
2594
2/2
✓ Branch 0 taken 158 times.
✓ Branch 1 taken 55 times.
 213 if (fil)
2595
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 if ( fil->type != MPEGTS_SECTION
2596
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 || fil->pid != pmt_pid
2597
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 158 times.
 158 || fil->u.section_filter.section_cb != pmt_cb)
2598 ✗ mpegts_close_filter(ts, ts->pids[pmt_pid]);
2599
2600
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 158 times.
 213 if (!ts->pids[pmt_pid])
2601 55 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2602 213 prg = add_program(ts, sid);
2603
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg) {
2604 213 unsigned prg_idx = prg - ts->prg;
2605
3/4
✓ Branch 0 taken 158 times.
✓ Branch 1 taken 55 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 158 times.
 213 if (prg->nb_pids && prg->pids[0] != pmt_pid)
2606 ✗ clear_program(prg);
2607 213 add_pid_to_program(prg, pmt_pid);
2608
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (prg_idx > nb_prg)
2609 ✗ FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2610
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg_idx >= nb_prg)
2611 213 nb_prg++;
2612 } else
2613 ✗ nb_prg = 0;
2614 }
2615 }
2616 213 ts->nb_prg = nb_prg;
2617
2618
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid < 0) {
2619 int i,j;
2620
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 for (j=0; j<ts->stream->nb_programs; j++) {
2621
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 for (i = 0; i < ts->nb_prg; i++)
2622
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (ts->prg[i].id == ts->stream->programs[j]->id)
2623 213 break;
2624
1/4
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 213 if (i==ts->nb_prg && !ts->skip_clear)
2625 ✗ clear_avprogram(ts, ts->stream->programs[j]->id);
2626 }
2627 }
2628 }
2629
2630 14 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2631 {
2632 14 MpegTSContext *ts = filter->u.section_filter.opaque;
2633 const uint8_t *p, *p_end;
2634 14 SectionHeader h1, *h = &h1;
2635
2636 /*
2637 * Sometimes we receive EPG packets but SDT table do not have
2638 * eit_pres_following or eit_sched turned on, so we open EPG
2639 * stream directly here.
2640 */
2641
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 11 times.
 14 if (!ts->epg_stream) {
2642 3 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2643
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
 3 if (!ts->epg_stream)
2644 2 return;
2645 3 ts->epg_stream->id = EIT_PID;
2646 3 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2647 3 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2648 }
2649
2650
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 12 times.
 14 if (ts->epg_stream->discard == AVDISCARD_ALL)
2651 2 return;
2652
2653 12 p_end = section + section_len - 4;
2654 12 p = section;
2655
2656
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 12 times.
 12 if (parse_section_header(h, &p, p_end) < 0)
2657 ✗ return;
2658
2/4
✓ Branch 0 taken 12 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 12 times.
 12 if (h->tid < EIT_TID || h->tid > OEITS_END_TID)
2659 ✗ return;
2660
2661 12 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2662
2663 /**
2664 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2665 * is scrambled.
2666 */
2667
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (h->id == 0xFFFF) {
2668 ✗ av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2669 ✗ return;
2670 }
2671
2672 /**
2673 * In case we receive an EPG packet before mpegts context is fully
2674 * initialized.
2675 */
2676
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (!ts->pkt)
2677 ✗ return;
2678
2679 12 new_data_packet(section, section_len, ts->pkt);
2680 12 ts->pkt->stream_index = ts->epg_stream->index;
2681 12 ts->stop_parse = 1;
2682 }
2683
2684 442 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2685 {
2686 442 MpegTSContext *ts = filter->u.section_filter.opaque;
2687 442 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2688 442 SectionHeader h1, *h = &h1;
2689 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2690 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2691 char *name, *provider_name;
2692
2693 442 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2694 hex_dump_debug(ts->stream, section, section_len);
2695
2696 442 p_end = section + section_len - 4;
2697 442 p = section;
2698
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 442 times.
 442 if (parse_section_header(h, &p, p_end) < 0)
2699 342 return;
2700
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 442 times.
 442 if (h->tid != SDT_TID)
2701 ✗ return;
2702
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 442 times.
 442 if (!h->current_next)
2703 ✗ return;
2704
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 387 times.
 442 if (ts->skip_changes)
2705 55 return;
2706
2/2
✓ Branch 1 taken 287 times.
✓ Branch 2 taken 100 times.
 387 if (skip_identical(h, tssf))
2707 287 return;
2708
2709 100 onid = get16(&p, p_end);
2710
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 100 times.
 100 if (onid < 0)
2711 ✗ return;
2712 100 val = get8(&p, p_end);
2713
1/2
✓ Branch 0 taken 100 times.
✗ Branch 1 not taken.
 100 if (val < 0)
2714 ✗ return;
2715 for (;;) {
2716 200 sid = get16(&p, p_end);
2717
2/2
✓ Branch 0 taken 100 times.
✓ Branch 1 taken 100 times.
 200 if (sid < 0)
2718 100 break;
2719 100 val = get8(&p, p_end);
2720
1/2
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 100 if (val < 0)
2721 ✗ break;
2722 100 desc_list_len = get16(&p, p_end);
2723
1/2
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✓ Branch 1 taken 100 times.
 100 if (desc_list_len < 0)
2724 ✗ break;
2725 100 desc_list_len &= 0xfff;
2726 100 desc_list_end = p + desc_list_len;
2727
1/2
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✗ Branch 1 not taken.
 100 if (desc_list_end > p_end)
2728 ✗ break;
2729 for (;;) {
2730 200 desc_tag = get8(&p, desc_list_end);
2731
2/2
✓ Branch 0 taken 100 times.
✓ Branch 1 taken 100 times.
 200 if (desc_tag < 0)
2732 100 break;
2733 100 desc_len = get8(&p, desc_list_end);
2734 100 desc_end = p + desc_len;
2735
2/4
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 100 if (desc_len < 0 || desc_end > desc_list_end)
2736 break;
2737
2738 100 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2739 desc_tag, desc_len);
2740
2741
1/2
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 100 switch (desc_tag) {
2742 100 case 0x48:
2743 100 service_type = get8(&p, desc_end);
2744
1/2
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✓ Branch 1 taken 100 times.
 100 if (service_type < 0)
2745 ✗ break;
2746 100 provider_name = getstr8(&p, desc_end);
2747
1/2
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✓ Branch 1 taken 100 times.
 100 if (!provider_name)
2748 ✗ break;
2749 100 name = getstr8(&p, desc_end);
2750
1/2
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✗ Branch 1 not taken.
 100 if (name) {
2751 100 AVProgram *program = av_new_program(ts->stream, sid);
2752
1/2
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✗ Branch 1 not taken.
 100 if (program) {
2753 100 av_dict_set(&program->metadata, "service_name", name, 0);
2754 100 av_dict_set(&program->metadata, "service_provider",
2755 provider_name, 0);
2756 }
2757 }
2758 100 av_free(name);
2759 100 av_free(provider_name);
2760 100 break;
2761 ✗ default:
2762 ✗ break;
2763 }
2764 100 p = desc_end;
2765 }
2766 100 p = desc_list_end;
2767 }
2768 }
2769
2770 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2771 const uint8_t *packet);
2772
2773 /* handle one TS packet */
2774 398491 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2775 {
2776 MpegTSFilter *tss;
2777 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2778 has_adaptation, has_payload;
2779 const uint8_t *p, *p_end;
2780
2781 398491 pid = AV_RB16(packet + 1) & 0x1fff;
2782 398491 is_start = packet[1] & 0x40;
2783 398491 tss = ts->pids[pid];
2784
6/6
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✓ Branch 3 taken 383671 times.
✓ Branch 4 taken 17 times.
✓ Branch 5 taken 6792 times.
 398491 if (ts->auto_guess && !tss && is_start) {
2785 17 add_pes_stream(ts, pid, -1);
2786 17 tss = ts->pids[pid];
2787 }
2788
2/2
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✓ Branch 1 taken 383829 times.
 398491 if (!tss)
2789 14662 return 0;
2790
2/2
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✓ Branch 1 taken 347696 times.
 383829 if (is_start)
2791 36133 tss->discard = discard_pid(ts, pid);
2792
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 383829 if (tss->discard)
2793 ✗ return 0;
2794 383829 ts->current_pid = pid;
2795
2796 383829 afc = (packet[3] >> 4) & 3;
2797
1/2
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 383829 if (afc == 0) /* reserved value */
2798 ✗ return 0;
2799 383829 has_adaptation = afc & 2;
2800 383829 has_payload = afc & 1;
2801 443389 is_discontinuity = has_adaptation &&
2802
4/4
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✓ Branch 3 taken 38 times.
 443351 packet[4] != 0 && /* with length > 0 */
2803
1/2
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✓ Branch 1 taken 59522 times.
 59522 (packet[5] & 0x80); /* and discontinuity indicated */
2804
2805 /* continuity check (currently not used) */
2806 383829 cc = (packet[3] & 0xf);
2807
2/2
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✓ Branch 1 taken 2846 times.
 383829 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2808
1/2
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✗ Branch 1 not taken.
 383829 cc_ok = pid == 0x1FFF || // null packet PID
2809 383829 is_discontinuity ||
2810
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✓ Branch 3 taken 1148 times.
✓ Branch 4 taken 382037 times.
✓ Branch 5 taken 644 times.
 767658 tss->last_cc < 0 ||
2811 expected_cc == cc;
2812
2813 383829 tss->last_cc = cc;
2814
2/2
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✓ Branch 1 taken 383185 times.
 383829 if (!cc_ok) {
2815 644 av_log(ts->stream, AV_LOG_DEBUG,
2816 "Continuity check failed for pid %d expected %d got %d\n",
2817 pid, expected_cc, cc);
2818
2/2
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✓ Branch 1 taken 637 times.
 644 if (tss->type == MPEGTS_PES) {
2819 7 PESContext *pc = tss->u.pes_filter.opaque;
2820 7 pc->flags |= AV_PKT_FLAG_CORRUPT;
2821 }
2822 }
2823
2824
2/2
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✓ Branch 1 taken 383817 times.
 383829 if (packet[1] & 0x80) {
2825 12 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2826
1/2
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✗ Branch 1 not taken.
 12 if (tss->type == MPEGTS_PES) {
2827 12 PESContext *pc = tss->u.pes_filter.opaque;
2828 12 pc->flags |= AV_PKT_FLAG_CORRUPT;
2829 }
2830 }
2831
2832 383829 p = packet + 4;
2833
2/2
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✓ Branch 1 taken 324269 times.
 383829 if (has_adaptation) {
2834 int64_t pcr_h;
2835 int pcr_l;
2836
2/2
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✓ Branch 2 taken 31967 times.
 59560 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2837 27593 tss->last_pcr = pcr_h * 300 + pcr_l;
2838 /* skip adaptation field */
2839 59560 p += p[0] + 1;
2840 }
2841 /* if past the end of packet, ignore */
2842 383829 p_end = packet + TS_PACKET_SIZE;
2843
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✗ Branch 2 not taken.
✓ Branch 3 taken 380971 times.
 383829 if (p >= p_end || !has_payload)
2844 2858 return 0;
2845
2846
1/2
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✗ Branch 1 not taken.
 380971 if (pos >= 0) {
2847
1/2
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✓ Branch 1 taken 380971 times.
 380971 av_assert0(pos >= TS_PACKET_SIZE);
2848 380971 ts->pos47_full = pos - TS_PACKET_SIZE;
2849 }
2850
2851
2/2
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✓ Branch 1 taken 374489 times.
 380971 if (tss->type == MPEGTS_SECTION) {
2852
2/2
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✓ Branch 1 taken 35 times.
 6482 if (is_start) {
2853 /* pointer field present */
2854 6447 len = *p++;
2855
1/2
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 6447 if (len > p_end - p)
2856 ✗ return 0;
2857
1/4
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✗ Branch 3 not taken.
 6447 if (len && cc_ok) {
2858 /* write remaining section bytes */
2859 ✗ write_section_data(ts, tss,
2860 p, len, 0);
2861 /* check whether filter has been closed */
2862 ✗ if (!ts->pids[pid])
2863 ✗ return 0;
2864 }
2865 6447 p += len;
2866
1/2
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✗ Branch 1 not taken.
 6447 if (p < p_end) {
2867 6447 write_section_data(ts, tss,
2868 6447 p, p_end - p, 1);
2869 }
2870 } else {
2871
1/2
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✗ Branch 1 not taken.
 35 if (cc_ok) {
2872 35 write_section_data(ts, tss,
2873 35 p, p_end - p, 0);
2874 }
2875 }
2876
2877 // stop find_stream_info from waiting for more streams
2878 // when all programs have received a PMT
2879
4/4
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✓ Branch 1 taken 2043 times.
✓ Branch 2 taken 17 times.
✓ Branch 3 taken 4422 times.
 6482 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2880 int i;
2881
2/2
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✓ Branch 1 taken 17 times.
 34 for (i = 0; i < ts->nb_prg; i++) {
2882
1/2
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 17 if (!ts->prg[i].pmt_found)
2883 ✗ break;
2884 }
2885
2/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 17 times.
✗ Branch 3 not taken.
 17 if (i == ts->nb_prg && ts->nb_prg > 0) {
2886 17 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2887 17 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2888 }
2889 }
2890
2891 } else {
2892 int ret;
2893 // Note: The position here points actually behind the current packet.
2894
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 374489 if (tss->type == MPEGTS_PES) {
2895
1/2
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 374489 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2896 374489 pos - ts->raw_packet_size)) < 0)
2897 ✗ return ret;
2898 }
2899 }
2900
2901 380971 return 0;
2902 }
2903
2904 59 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2905 {
2906 59 MpegTSContext *ts = s->priv_data;
2907 59 AVIOContext *pb = s->pb;
2908 int c, i;
2909 59 uint64_t pos = avio_tell(pb);
2910 59 int64_t back = FFMIN(seekback, pos);
2911
2912 //Special case for files like 01c56b0dc1.ts
2913
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 59 if (current_packet[0] == 0x80 && current_packet[12] == 0x47 && pos >= TS_PACKET_SIZE) {
2914 ✗ avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2915 ✗ return 0;
2916 }
2917
2918 59 avio_seek(pb, -back, SEEK_CUR);
2919
2920
1/2
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✗ Branch 1 not taken.
 4257 for (i = 0; i < ts->resync_size; i++) {
2921 4257 c = avio_r8(pb);
2922
1/2
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 4257 if (avio_feof(pb))
2923 ✗ return AVERROR_EOF;
2924
2/2
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✓ Branch 1 taken 4198 times.
 4257 if (c == 0x47) {
2925 int new_packet_size, ret;
2926 59 avio_seek(pb, -1, SEEK_CUR);
2927 59 pos = avio_tell(pb);
2928 59 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2929
1/2
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✓ Branch 1 taken 59 times.
 59 if (ret < 0)
2930 ✗ return ret;
2931 59 new_packet_size = get_packet_size(s);
2932
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✗ Branch 1 not taken.
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✓ Branch 3 taken 59 times.
 59 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2933 ✗ av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2934 ✗ ts->raw_packet_size = new_packet_size;
2935 }
2936 59 avio_seek(pb, pos, SEEK_SET);
2937 59 return 0;
2938 }
2939 }
2940 ✗ av_log(s, AV_LOG_ERROR,
2941 "max resync size reached, could not find sync byte\n");
2942 /* no sync found */
2943 ✗ return AVERROR_INVALIDDATA;
2944 }
2945
2946 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2947 398864 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2948 const uint8_t **data)
2949 {
2950 398864 AVIOContext *pb = s->pb;
2951 int len;
2952
2953 for (;;) {
2954 398923 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2955
2/2
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✓ Branch 1 taken 398550 times.
 398923 if (len != TS_PACKET_SIZE)
2956
2/2
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✓ Branch 1 taken 57 times.
 373 return len < 0 ? len : AVERROR_EOF;
2957 /* check packet sync byte */
2958
2/2
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✓ Branch 1 taken 398491 times.
 398550 if ((*data)[0] != 0x47) {
2959 /* find a new packet start */
2960
2961
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 59 times.
 59 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2962 ✗ return AVERROR(EAGAIN);
2963 else
2964 59 continue;
2965 } else {
2966 398491 break;
2967 }
2968 }
2969 398491 return 0;
2970 }
2971
2972 398491 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2973 {
2974 398491 AVIOContext *pb = s->pb;
2975 398491 int skip = raw_packet_size - TS_PACKET_SIZE;
2976
1/2
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✓ Branch 1 taken 398491 times.
 398491 if (skip > 0)
2977 ✗ avio_skip(pb, skip);
2978 398491 }
2979
2980 29249 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
2981 {
2982 29249 AVFormatContext *s = ts->stream;
2983 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
2984 const uint8_t *data;
2985 int64_t packet_num;
2986 29249 int ret = 0;
2987
2988
2/2
✓ Branch 1 taken 260 times.
✓ Branch 2 taken 28989 times.
 29249 if (avio_tell(s->pb) != ts->last_pos) {
2989 int i;
2990 260 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
2991 /* seek detected, flush pes buffer */
2992
2/2
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✓ Branch 1 taken 260 times.
 2130180 for (i = 0; i < NB_PID_MAX; i++) {
2993
2/2
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✓ Branch 1 taken 2128297 times.
 2129920 if (ts->pids[i]) {
2994
2/2
✓ Branch 0 taken 559 times.
✓ Branch 1 taken 1064 times.
 1623 if (ts->pids[i]->type == MPEGTS_PES) {
2995 559 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
2996 559 av_buffer_unref(&pes->buffer);
2997 559 pes->data_index = 0;
2998 559 pes->state = MPEGTS_SKIP; /* skip until pes header */
2999
1/2
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✗ Branch 1 not taken.
 1064 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
3000 1064 ts->pids[i]->u.section_filter.last_ver = -1;
3001 }
3002 1623 ts->pids[i]->last_cc = -1;
3003 1623 ts->pids[i]->last_pcr = -1;
3004 }
3005 }
3006 }
3007
3008 29249 ts->stop_parse = 0;
3009 29249 packet_num = 0;
3010 29249 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3011 for (;;) {
3012 427740 packet_num++;
3013
3/4
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✓ Branch 2 taken 8066 times.
✗ Branch 3 not taken.
 427740 if (nb_packets != 0 && packet_num >= nb_packets ||
3014
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 427685 times.
 427740 ts->stop_parse > 1) {
3015 55 ret = AVERROR(EAGAIN);
3016 55 break;
3017 }
3018
2/2
✓ Branch 0 taken 28821 times.
✓ Branch 1 taken 398864 times.
 427685 if (ts->stop_parse > 0)
3019 28821 break;
3020
3021 398864 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3022
2/2
✓ Branch 0 taken 373 times.
✓ Branch 1 taken 398491 times.
 398864 if (ret != 0)
3023 373 break;
3024 398491 ret = handle_packet(ts, data, avio_tell(s->pb));
3025 398491 finished_reading_packet(s, ts->raw_packet_size);
3026
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 398491 times.
 398491 if (ret != 0)
3027 ✗ break;
3028 }
3029 29249 ts->last_pos = avio_tell(s->pb);
3030 29249 return ret;
3031 }
3032
3033 7186 static int mpegts_probe(const AVProbeData *p)
3034 {
3035 7186 const int size = p->buf_size;
3036 7186 int maxscore = 0;
3037 7186 int sumscore = 0;
3038 int i;
3039 7186 int check_count = size / TS_FEC_PACKET_SIZE;
3040 #define CHECK_COUNT 10
3041 #define CHECK_BLOCK 100
3042
3043
2/2
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✓ Branch 1 taken 7173 times.
 7186 if (!check_count)
3044 13 return 0;
3045
3046
2/2
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✓ Branch 1 taken 7173 times.
 30672 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3047 23499 int left = FFMIN(check_count - i, CHECK_BLOCK);
3048 23499 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3049 23499 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
3050 23499 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
3051 23499 score = FFMAX3(score, dvhs_score, fec_score);
3052 23499 sumscore += score;
3053 23499 maxscore = FFMAX(maxscore, score);
3054 }
3055
3056 7173 sumscore = sumscore * CHECK_COUNT / check_count;
3057 7173 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3058
3059 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3060
3061
3/4
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✗ Branch 2 not taken.
✓ Branch 3 taken 3201 times.
 7173 if (check_count > CHECK_COUNT && sumscore > 6) {
3062 ✗ return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3063
4/4
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✓ Branch 1 taken 354 times.
✓ Branch 2 taken 47 times.
✓ Branch 3 taken 6772 times.
 7173 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3064 47 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3065
3/4
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✓ Branch 1 taken 354 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 6772 times.
 7126 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3066 ✗ return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3067
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 7121 times.
 7126 } else if (sumscore > 6) {
3068 5 return 2;
3069 } else {
3070 7121 return 0;
3071 }
3072 }
3073
3074 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3075 * (-1) if not available */
3076 59560 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3077 {
3078 int afc, len, flags;
3079 const uint8_t *p;
3080 unsigned int v;
3081
3082 59560 afc = (packet[3] >> 4) & 3;
3083
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 59560 times.
 59560 if (afc <= 1)
3084 ✗ return AVERROR_INVALIDDATA;
3085 59560 p = packet + 4;
3086 59560 len = p[0];
3087 59560 p++;
3088
2/2
✓ Branch 0 taken 38 times.
✓ Branch 1 taken 59522 times.
 59560 if (len == 0)
3089 38 return AVERROR_INVALIDDATA;
3090 59522 flags = *p++;
3091 59522 len--;
3092
2/2
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✓ Branch 1 taken 27593 times.
 59522 if (!(flags & 0x10))
3093 31929 return AVERROR_INVALIDDATA;
3094
1/2
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✓ Branch 1 taken 27593 times.
 27593 if (len < 6)
3095 ✗ return AVERROR_INVALIDDATA;
3096 27593 v = AV_RB32(p);
3097 27593 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3098 27593 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3099 27593 return 0;
3100 }
3101
3102 110 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3103
3104 /* NOTE: We attempt to seek on non-seekable files as well, as the
3105 * probe buffer usually is big enough. Only warn if the seek failed
3106 * on files where the seek should work. */
3107
1/2
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✓ Branch 2 taken 110 times.
 110 if (avio_seek(pb, pos, SEEK_SET) < 0)
3108 ✗ av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3109 110 }
3110
3111 55 static int mpegts_read_header(AVFormatContext *s)
3112 {
3113 55 MpegTSContext *ts = s->priv_data;
3114 55 AVIOContext *pb = s->pb;
3115 55 int64_t pos, probesize = s->probesize;
3116 55 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3117
3118
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 55 if (ffio_ensure_seekback(pb, seekback) < 0)
3119 ✗ av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3120
3121 55 pos = avio_tell(pb);
3122 55 ts->raw_packet_size = get_packet_size(s);
3123
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 55 if (ts->raw_packet_size <= 0) {
3124 ✗ av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3125 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3126 }
3127 55 ts->stream = s;
3128 55 ts->auto_guess = 0;
3129
3130
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 55 if (s->iformat == &ff_mpegts_demuxer.p) {
3131 /* normal demux */
3132
3133 /* first do a scan to get all the services */
3134 55 seek_back(s, pb, pos);
3135
3136 55 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3137 55 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3138 55 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3139
3140 55 handle_packets(ts, probesize / ts->raw_packet_size);
3141 /* if could not find service, enable auto_guess */
3142
3143 55 ts->auto_guess = 1;
3144
3145 55 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3146
3147 55 s->ctx_flags |= AVFMTCTX_NOHEADER;
3148 } else {
3149 AVStream *st;
3150 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3151 int64_t pcrs[2], pcr_h;
3152 uint8_t packet[TS_PACKET_SIZE];
3153 const uint8_t *data;
3154
3155 /* only read packets */
3156
3157 ✗ st = avformat_new_stream(s, NULL);
3158 ✗ if (!st)
3159 ✗ return AVERROR(ENOMEM);
3160 ✗ avpriv_set_pts_info(st, 60, 1, 27000000);
3161 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3162 ✗ st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3163
3164 /* we iterate until we find two PCRs to estimate the bitrate */
3165 ✗ pcr_pid = -1;
3166 ✗ nb_pcrs = 0;
3167 ✗ nb_packets = 0;
3168 for (;;) {
3169 ✗ ret = read_packet(s, packet, ts->raw_packet_size, &data);
3170 ✗ if (ret < 0)
3171 ✗ return ret;
3172 ✗ pid = AV_RB16(data + 1) & 0x1fff;
3173 ✗ if ((pcr_pid == -1 || pcr_pid == pid) &&
3174 ✗ parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3175 ✗ finished_reading_packet(s, ts->raw_packet_size);
3176 ✗ pcr_pid = pid;
3177 ✗ pcrs[nb_pcrs] = pcr_h * 300 + pcr_l;
3178 ✗ nb_pcrs++;
3179 ✗ if (nb_pcrs >= 2) {
3180 ✗ if (pcrs[1] - pcrs[0] > 0) {
3181 /* the difference needs to be positive to make sense for bitrate computation */
3182 ✗ break;
3183 } else {
3184 ✗ av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3185 ✗ pcrs[0] = pcrs[1];
3186 ✗ nb_pcrs--;
3187 }
3188 }
3189 } else {
3190 ✗ finished_reading_packet(s, ts->raw_packet_size);
3191 }
3192 ✗ nb_packets++;
3193 }
3194
3195 /* NOTE1: the bitrate is computed without the FEC */
3196 /* NOTE2: it is only the bitrate of the start of the stream */
3197 ✗ ts->pcr_incr = pcrs[1] - pcrs[0];
3198 ✗ ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3199 ✗ s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3200 ✗ st->codecpar->bit_rate = s->bit_rate;
3201 ✗ st->start_time = ts->cur_pcr;
3202 ✗ av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3203 ✗ st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3204 }
3205
3206 55 seek_back(s, pb, pos);
3207 55 return 0;
3208 }
3209
3210 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3211
3212 ✗ static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3213 {
3214 ✗ MpegTSContext *ts = s->priv_data;
3215 int ret, i;
3216 int64_t pcr_h, next_pcr_h, pos;
3217 int pcr_l, next_pcr_l;
3218 uint8_t pcr_buf[12];
3219 const uint8_t *data;
3220
3221 ✗ if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3222 ✗ return ret;
3223 ✗ ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3224 ✗ pkt->pos = avio_tell(s->pb);
3225 ✗ if (ret < 0) {
3226 ✗ return ret;
3227 }
3228 ✗ if (data != pkt->data)
3229 ✗ memcpy(pkt->data, data, TS_PACKET_SIZE);
3230 ✗ finished_reading_packet(s, ts->raw_packet_size);
3231 ✗ if (ts->mpeg2ts_compute_pcr) {
3232 /* compute exact PCR for each packet */
3233 ✗ if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3234 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3235 ✗ pos = avio_tell(s->pb);
3236 ✗ for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3237 ✗ avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3238 ✗ avio_read(s->pb, pcr_buf, 12);
3239 ✗ if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3240 /* XXX: not precise enough */
3241 ✗ ts->pcr_incr =
3242 ✗ ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
3243 ✗ (i + 1);
3244 ✗ break;
3245 }
3246 }
3247 ✗ avio_seek(s->pb, pos, SEEK_SET);
3248 /* no next PCR found: we use previous increment */
3249 ✗ ts->cur_pcr = pcr_h * 300 + pcr_l;
3250 }
3251 ✗ pkt->pts = ts->cur_pcr;
3252 ✗ pkt->duration = ts->pcr_incr;
3253 ✗ ts->cur_pcr += ts->pcr_incr;
3254 }
3255 ✗ pkt->stream_index = 0;
3256 ✗ return 0;
3257 }
3258
3259 29194 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3260 {
3261 29194 MpegTSContext *ts = s->priv_data;
3262 int ret, i;
3263
3264 29194 pkt->size = -1;
3265 29194 ts->pkt = pkt;
3266 29194 ret = handle_packets(ts, 0);
3267
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 29194 if (ret < 0) {
3268 373 av_packet_unref(ts->pkt);
3269 /* flush pes data left */
3270
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 2214834 for (i = 0; i < NB_PID_MAX; i++)
3271
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✓ Branch 3 taken 1487 times.
 2214625 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3272 862 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3273
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 862 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3274 164 ret = new_pes_packet(pes, pkt);
3275
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 164 if (ret < 0)
3276 ✗ return ret;
3277 164 pes->state = MPEGTS_SKIP;
3278 164 ret = 0;
3279 164 break;
3280 }
3281 }
3282 }
3283
3284
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 29194 if (!ret && pkt->size < 0)
3285 ✗ ret = AVERROR_INVALIDDATA;
3286 29194 return ret;
3287 }
3288
3289 55 static void mpegts_free(MpegTSContext *ts)
3290 {
3291 int i;
3292
3293 55 clear_programs(ts);
3294
3295
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 1815 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3296 1760 av_buffer_pool_uninit(&ts->pools[i]);
3297
3298
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 450615 for (i = 0; i < NB_PID_MAX; i++)
3299
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 450560 if (ts->pids[i])
3300 353 mpegts_close_filter(ts, ts->pids[i]);
3301 55 }
3302
3303 55 static int mpegts_read_close(AVFormatContext *s)
3304 {
3305 55 MpegTSContext *ts = s->priv_data;
3306 55 mpegts_free(ts);
3307 55 return 0;
3308 }
3309
3310 ✗ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3311 int64_t *ppos, int64_t pos_limit)
3312 {
3313 ✗ MpegTSContext *ts = s->priv_data;
3314 int64_t pos, timestamp;
3315 uint8_t buf[TS_PACKET_SIZE];
3316 ✗ int pcr_l, pcr_pid =
3317 ✗ ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3318 ✗ int pos47 = ts->pos47_full % ts->raw_packet_size;
3319 ✗ pos =
3320 ✗ ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3321 ✗ ts->raw_packet_size + pos47;
3322 ✗ while(pos < pos_limit) {
3323 ✗ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3324 ✗ return AV_NOPTS_VALUE;
3325 ✗ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3326 ✗ return AV_NOPTS_VALUE;
3327 ✗ if (buf[0] != 0x47) {
3328 ✗ if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3329 ✗ return AV_NOPTS_VALUE;
3330 ✗ pos = avio_tell(s->pb);
3331 ✗ continue;
3332 }
3333 ✗ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3334 ✗ parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3335 ✗ *ppos = pos;
3336 ✗ return timestamp;
3337 }
3338 ✗ pos += ts->raw_packet_size;
3339 }
3340
3341 ✗ return AV_NOPTS_VALUE;
3342 }
3343
3344 90 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3345 int64_t *ppos, int64_t pos_limit)
3346 {
3347 90 MpegTSContext *ts = s->priv_data;
3348 AVPacket *pkt;
3349 int64_t pos;
3350 90 int pos47 = ts->pos47_full % ts->raw_packet_size;
3351 90 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3352 90 ff_read_frame_flush(s);
3353
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 90 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3354 ✗ return AV_NOPTS_VALUE;
3355 90 pkt = av_packet_alloc();
3356
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 90 if (!pkt)
3357 ✗ return AV_NOPTS_VALUE;
3358
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 496 while(pos < pos_limit) {
3359 484 int ret = av_read_frame(s, pkt);
3360
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 484 if (ret < 0) {
3361 18 av_packet_free(&pkt);
3362 18 return AV_NOPTS_VALUE;
3363 }
3364
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 466 if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3365 163 ff_reduce_index(s, pkt->stream_index);
3366 163 av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3367
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 163 if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3368 60 int64_t dts = pkt->dts;
3369 60 *ppos = pkt->pos;
3370 60 av_packet_free(&pkt);
3371 60 return dts;
3372 }
3373 }
3374 406 pos = pkt->pos;
3375 406 av_packet_unref(pkt);
3376 }
3377
3378 12 av_packet_free(&pkt);
3379 12 return AV_NOPTS_VALUE;
3380 }
3381
3382 /**************************************************************/
3383 /* parsing functions - called from other demuxers such as RTP */
3384
3385 ✗ MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3386 {
3387 MpegTSContext *ts;
3388
3389 ✗ ts = av_mallocz(sizeof(MpegTSContext));
3390 ✗ if (!ts)
3391 ✗ return NULL;
3392 /* no stream case, currently used by RTP */
3393 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3394 ✗ ts->max_packet_size = 2048000;
3395 ✗ ts->stream = s;
3396 ✗ ts->auto_guess = 1;
3397
3398 ✗ mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3399 ✗ mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3400 ✗ mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3401
3402 ✗ return ts;
3403 }
3404
3405 /* return the consumed length if a packet was output, or -1 if no
3406 * packet is output */
3407 ✗ int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3408 const uint8_t *buf, int len)
3409 {
3410 int len1;
3411
3412 ✗ len1 = len;
3413 ✗ ts->pkt = pkt;
3414 for (;;) {
3415 ✗ ts->stop_parse = 0;
3416 ✗ if (len < TS_PACKET_SIZE)
3417 ✗ return AVERROR_INVALIDDATA;
3418 ✗ if (buf[0] != 0x47) {
3419 ✗ buf++;
3420 ✗ len--;
3421 } else {
3422 ✗ handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3423 ✗ buf += TS_PACKET_SIZE;
3424 ✗ len -= TS_PACKET_SIZE;
3425 ✗ if (ts->stop_parse == 1)
3426 ✗ break;
3427 }
3428 }
3429 ✗ return len1 - len;
3430 }
3431
3432 ✗ void avpriv_mpegts_parse_close(MpegTSContext *ts)
3433 {
3434 ✗ mpegts_free(ts);
3435 ✗ av_free(ts);
3436 ✗ }
3437
3438 const FFInputFormat ff_mpegts_demuxer = {
3439 .p.name = "mpegts",
3440 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3441 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3442 .p.priv_class = &mpegts_class,
3443 .priv_data_size = sizeof(MpegTSContext),
3444 .read_probe = mpegts_probe,
3445 .read_header = mpegts_read_header,
3446 .read_packet = mpegts_read_packet,
3447 .read_close = mpegts_read_close,
3448 .read_timestamp = mpegts_get_dts,
3449 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3450 };
3451
3452 const FFInputFormat ff_mpegtsraw_demuxer = {
3453 .p.name = "mpegtsraw",
3454 .p.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3455 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3456 .p.priv_class = &mpegtsraw_class,
3457 .priv_data_size = sizeof(MpegTSContext),
3458 .read_header = mpegts_read_header,
3459 .read_packet = mpegts_raw_read_packet,
3460 .read_close = mpegts_read_close,
3461 .read_timestamp = mpegts_get_dts,
3462 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3463 };
3464