FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2025-05-16 23:44:11
Exec Total Coverage
Lines: 1112 1941 57.3%
Functions: 49 70 70.0%
Branches: 608 1303 46.7%
Line Branch Exec Source
1 /*
2 * MPEG-2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include "libavutil/attributes_internal.h"
25 #include "libavutil/buffer.h"
26 #include "libavutil/crc.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/log.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/bytestream.h"
36 #include "libavcodec/defs.h"
37 #include "libavcodec/get_bits.h"
38 #include "libavcodec/opus/opus.h"
39 #include "avformat.h"
40 #include "mpegts.h"
41 #include "internal.h"
42 #include "avio_internal.h"
43 #include "demux.h"
44 #include "mpeg.h"
45 #include "isom.h"
46 #if CONFIG_ICONV
47 #include <iconv.h>
48 #endif
49
50 /* maximum size in which we look for synchronization if
51 * synchronization is lost */
52 #define MAX_RESYNC_SIZE 65536
53
54 #define MAX_MP4_DESCR_COUNT 16
55
56 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
57 do { \
58 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
59 (modulus) = (dividend) % (divisor); \
60 (prev_dividend) = (dividend); \
61 } while (0)
62
63 #define PROBE_PACKET_MAX_BUF 8192
64 #define PROBE_PACKET_MARGIN 5
65
66 enum MpegTSFilterType {
67 MPEGTS_PES,
68 MPEGTS_SECTION,
69 MPEGTS_PCR,
70 };
71
72 typedef struct MpegTSFilter MpegTSFilter;
73
74 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
75 int is_start, int64_t pos);
76
77 typedef struct MpegTSPESFilter {
78 PESCallback *pes_cb;
79 void *opaque;
80 } MpegTSPESFilter;
81
82 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
83
84 typedef void SetServiceCallback (void *opaque, int ret);
85
86 typedef struct MpegTSSectionFilter {
87 int section_index;
88 int section_h_size;
89 int last_ver;
90 unsigned crc;
91 unsigned last_crc;
92 uint8_t *section_buf;
93 unsigned int check_crc : 1;
94 unsigned int end_of_section_reached : 1;
95 SectionCallback *section_cb;
96 void *opaque;
97 } MpegTSSectionFilter;
98
99 struct MpegTSFilter {
100 int pid;
101 int es_id;
102 int last_cc; /* last cc code (-1 if first packet) */
103 int64_t last_pcr;
104 int discard;
105 enum MpegTSFilterType type;
106 union {
107 MpegTSPESFilter pes_filter;
108 MpegTSSectionFilter section_filter;
109 } u;
110 };
111
112 struct Stream {
113 int idx;
114 int stream_identifier;
115 };
116
117 #define MAX_STREAMS_PER_PROGRAM 128
118 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
119 struct Program {
120 unsigned int id; // program id/service id
121 unsigned int nb_pids;
122 unsigned int pids[MAX_PIDS_PER_PROGRAM];
123 unsigned int nb_streams;
124 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
125
126 /** have we found pmt for this program */
127 int pmt_found;
128 };
129
130 struct MpegTSContext {
131 const AVClass *class;
132 /* user data */
133 AVFormatContext *stream;
134 /** raw packet size, including FEC if present */
135 int raw_packet_size;
136
137 int64_t pos47_full;
138
139 /** if true, all pids are analyzed to find streams */
140 int auto_guess;
141
142 /** compute exact PCR for each transport stream packet */
143 int mpeg2ts_compute_pcr;
144
145 /** fix dvb teletext pts */
146 int fix_teletext_pts;
147
148 int64_t cur_pcr; /**< used to estimate the exact PCR */
149 int64_t pcr_incr; /**< used to estimate the exact PCR */
150
151 /* data needed to handle file based ts */
152 /** stop parsing loop */
153 int stop_parse;
154 /** packet containing Audio/Video data */
155 AVPacket *pkt;
156 /** to detect seek */
157 int64_t last_pos;
158
159 int skip_changes;
160 int skip_clear;
161 int skip_unknown_pmt;
162
163 int scan_all_pmts;
164
165 int resync_size;
166 int merge_pmt_versions;
167 int max_packet_size;
168
169 int id;
170
171 /******************************************/
172 /* private mpegts data */
173 /* scan context */
174 /** structure to keep track of Program->pids mapping */
175 unsigned int nb_prg;
176 struct Program *prg;
177
178 int8_t crc_validity[NB_PID_MAX];
179 /** filters for various streams specified by PMT + for the PAT and PMT */
180 MpegTSFilter *pids[NB_PID_MAX];
181 int current_pid;
182
183 AVStream *epg_stream;
184 AVBufferPool* pools[32];
185 };
186
187 #define MPEGTS_OPTIONS \
188 { "resync_size", "set size limit for looking up a new synchronization", \
189 offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, \
190 { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, \
191 { "ts_id", "transport stream id", \
192 offsetof(MpegTSContext, id), AV_OPT_TYPE_INT, \
193 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, \
194 { "ts_packetsize", "output option carrying the raw packet size", \
195 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, \
196 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }
197
198 static const AVOption options[] = {
199 MPEGTS_OPTIONS,
200 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
201 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
202 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
203 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
204 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
205 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
206 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
207 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
208 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
209 {.i64 = 0}, 0, 1, 0 },
210 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
211 {.i64 = 0}, 0, 1, 0 },
212 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
213 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
214 { NULL },
215 };
216
217 static const AVClass mpegts_class = {
218 .class_name = "mpegts demuxer",
219 .item_name = av_default_item_name,
220 .option = options,
221 .version = LIBAVUTIL_VERSION_INT,
222 };
223
224 static const AVOption raw_options[] = {
225 MPEGTS_OPTIONS,
226 { "compute_pcr", "compute exact PCR for each transport stream packet",
227 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
228 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
229 { NULL },
230 };
231
232 static const AVClass mpegtsraw_class = {
233 .class_name = "mpegtsraw demuxer",
234 .item_name = av_default_item_name,
235 .option = raw_options,
236 .version = LIBAVUTIL_VERSION_INT,
237 };
238
239 /* TS stream handling */
240
241 enum MpegTSState {
242 MPEGTS_HEADER = 0,
243 MPEGTS_PESHEADER,
244 MPEGTS_PESHEADER_FILL,
245 MPEGTS_PAYLOAD,
246 MPEGTS_SKIP,
247 };
248
249 /* enough for PES header + length */
250 #define PES_START_SIZE 6
251 #define PES_HEADER_SIZE 9
252 #define MAX_PES_HEADER_SIZE (9 + 255)
253
254 typedef struct PESContext {
255 int pid;
256 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
257 int stream_type;
258 MpegTSContext *ts;
259 AVFormatContext *stream;
260 AVStream *st;
261 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
262 enum MpegTSState state;
263 /* used to get the format */
264 int data_index;
265 int flags; /**< copied to the AVPacket flags */
266 int PES_packet_length;
267 int pes_header_size;
268 int extended_stream_id;
269 uint8_t stream_id;
270 int64_t pts, dts;
271 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
272 uint8_t header[MAX_PES_HEADER_SIZE];
273 AVBufferRef *buffer;
274 SLConfigDescr sl;
275 int merged_st;
276 } PESContext;
277
278 EXTERN const FFInputFormat ff_mpegts_demuxer;
279
280 484 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
281 {
282 int i;
283
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 484 for (i = 0; i < ts->nb_prg; i++) {
284
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 429 if (ts->prg[i].id == programid) {
285 429 return &ts->prg[i];
286 }
287 }
288 55 return NULL;
289 }
290
291 172 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
292 {
293 172 AVProgram *prg = NULL;
294 int i;
295
296
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 172 for (i = 0; i < ts->stream->nb_programs; i++)
297
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 172 if (ts->stream->programs[i]->id == programid) {
298 172 prg = ts->stream->programs[i];
299 172 break;
300 }
301
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 172 if (!prg)
302 ✗ return;
303 172 prg->nb_stream_indexes = 0;
304 }
305
306 326 static void clear_program(struct Program *p)
307 {
308
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 326 if (!p)
309 ✗ return;
310 326 p->nb_pids = 0;
311 326 p->nb_streams = 0;
312 326 p->pmt_found = 0;
313 }
314
315 55 static void clear_programs(MpegTSContext *ts)
316 {
317 55 av_freep(&ts->prg);
318 55 ts->nb_prg = 0;
319 55 }
320
321 213 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
322 {
323 213 struct Program *p = get_program(ts, programid);
324
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 213 if (p)
325 158 return p;
326
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 55 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
327 ✗ ts->nb_prg = 0;
328 ✗ return NULL;
329 }
330 55 p = &ts->prg[ts->nb_prg];
331 55 p->id = programid;
332 55 clear_program(p);
333 55 ts->nb_prg++;
334 55 return p;
335 }
336
337 1314 static void add_pid_to_program(struct Program *p, unsigned int pid)
338 {
339 int i;
340
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 1314 if (!p)
341 ✗ return;
342
343
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 1314 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
344 ✗ return;
345
346
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 2638 for (i = 0; i < p->nb_pids; i++)
347
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 1759 if (p->pids[i] == pid)
348 435 return;
349
350 879 p->pids[p->nb_pids++] = pid;
351 }
352
353 271 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
354 unsigned int pid, int version)
355 {
356 int i;
357
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 271 for (i = 0; i < s->nb_programs; i++) {
358 271 AVProgram *program = s->programs[i];
359
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 271 if (program->id == programid) {
360 271 int old_pcr_pid = program->pcr_pid,
361 271 old_version = program->pmt_version;
362 271 program->pcr_pid = pid;
363 271 program->pmt_version = version;
364
365
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 271 if (old_version != -1 && old_version != version) {
366 18 av_log(s, AV_LOG_VERBOSE,
367 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
368 programid, old_version, version, old_pcr_pid, pid);
369 }
370 271 break;
371 }
372 }
373 271 }
374
375 /**
376 * @brief discard_pid() decides if the pid is to be discarded according
377 * to caller's programs selection
378 * @param ts : - TS context
379 * @param pid : - pid
380 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
381 * 0 otherwise
382 */
383 36140 static int discard_pid(MpegTSContext *ts, unsigned int pid)
384 {
385 int i, j, k;
386 36140 int used = 0, discarded = 0;
387 struct Program *p;
388
389
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 36140 if (pid == PAT_PID)
390 3015 return 0;
391
392 /* If none of the programs have .discard=AVDISCARD_ALL then there's
393 * no way we have to discard this packet */
394
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 66223 for (k = 0; k < ts->stream->nb_programs; k++)
395
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 33098 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
396 ✗ break;
397
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 33125 if (k == ts->stream->nb_programs)
398 33125 return 0;
399
400 ✗ for (i = 0; i < ts->nb_prg; i++) {
401 ✗ p = &ts->prg[i];
402 ✗ for (j = 0; j < p->nb_pids; j++) {
403 ✗ if (p->pids[j] != pid)
404 ✗ continue;
405 // is program with id p->id set to be discarded?
406 ✗ for (k = 0; k < ts->stream->nb_programs; k++) {
407 ✗ if (ts->stream->programs[k]->id == p->id) {
408 ✗ if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
409 ✗ discarded++;
410 else
411 ✗ used++;
412 }
413 }
414 }
415 }
416
417 ✗ return !used && discarded;
418 }
419
420 /**
421 * Assemble PES packets out of TS packets, and then call the "section_cb"
422 * function when they are complete.
423 */
424 6494 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
425 const uint8_t *buf, int buf_size, int is_start)
426 {
427 6494 MpegTSSectionFilter *tss = &tss1->u.section_filter;
428 6494 uint8_t *cur_section_buf = NULL;
429 int len, offset;
430
431
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 6494 if (is_start) {
432 6459 memcpy(tss->section_buf, buf, buf_size);
433 6459 tss->section_index = buf_size;
434 6459 tss->section_h_size = -1;
435 6459 tss->end_of_section_reached = 0;
436 } else {
437
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 35 if (tss->end_of_section_reached)
438 ✗ return;
439 35 len = MAX_SECTION_SIZE - tss->section_index;
440
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 35 if (buf_size < len)
441 35 len = buf_size;
442 35 memcpy(tss->section_buf + tss->section_index, buf, len);
443 35 tss->section_index += len;
444 }
445
446 6494 offset = 0;
447 6494 cur_section_buf = tss->section_buf;
448
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 12953 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != STUFFING_BYTE) {
449 /* compute section length if possible */
450
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 6702 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
451 6494 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
452
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 6494 if (len > MAX_SECTION_SIZE)
453 ✗ return;
454 6494 tss->section_h_size = len;
455 }
456
457
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 6702 if (tss->section_h_size != -1 &&
458
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 6494 tss->section_index >= offset + tss->section_h_size) {
459 6459 int crc_valid = 1;
460 6459 tss->end_of_section_reached = 1;
461
462
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 6459 if (tss->check_crc) {
463 6459 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
464
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 6459 if (tss->section_h_size >= 4)
465 6459 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
466
467
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 6459 if (crc_valid) {
468 6459 ts->crc_validity[ tss1->pid ] = 100;
469 ✗ }else if (ts->crc_validity[ tss1->pid ] > -10) {
470 ✗ ts->crc_validity[ tss1->pid ]--;
471 }else
472 ✗ crc_valid = 2;
473 }
474
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 6459 if (crc_valid) {
475 6459 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
476
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 6459 if (crc_valid != 1)
477 ✗ tss->last_ver = -1;
478 }
479
480 6459 cur_section_buf += tss->section_h_size;
481 6459 offset += tss->section_h_size;
482 6459 tss->section_h_size = -1;
483 } else {
484 243 tss->section_h_size = -1;
485 243 tss->end_of_section_reached = 0;
486 243 break;
487 }
488 }
489 }
490
491 353 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
492 enum MpegTSFilterType type)
493 {
494 MpegTSFilter *filter;
495
496 353 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
497
498
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 353 if (pid >= NB_PID_MAX || ts->pids[pid])
499 ✗ return NULL;
500 353 filter = av_mallocz(sizeof(MpegTSFilter));
501
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 353 if (!filter)
502 ✗ return NULL;
503 353 ts->pids[pid] = filter;
504
505 353 filter->type = type;
506 353 filter->pid = pid;
507 353 filter->es_id = -1;
508 353 filter->last_cc = -1;
509 353 filter->last_pcr= -1;
510
511 353 return filter;
512 }
513
514 227 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
515 unsigned int pid,
516 SectionCallback *section_cb,
517 void *opaque,
518 int check_crc)
519 {
520 MpegTSFilter *filter;
521 MpegTSSectionFilter *sec;
522 227 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
523
524
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 227 if (!section_buf)
525 ✗ return NULL;
526
527
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 227 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
528 ✗ av_free(section_buf);
529 ✗ return NULL;
530 }
531 227 sec = &filter->u.section_filter;
532 227 sec->section_cb = section_cb;
533 227 sec->opaque = opaque;
534 227 sec->section_buf = section_buf;
535 227 sec->check_crc = check_crc;
536 227 sec->last_ver = -1;
537
538 227 return filter;
539 }
540
541 126 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
542 PESCallback *pes_cb,
543 void *opaque)
544 {
545 MpegTSFilter *filter;
546 MpegTSPESFilter *pes;
547
548
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 126 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
549 ✗ return NULL;
550
551 126 pes = &filter->u.pes_filter;
552 126 pes->pes_cb = pes_cb;
553 126 pes->opaque = opaque;
554 126 return filter;
555 }
556
557 ✗ static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
558 {
559 ✗ return mpegts_open_filter(ts, pid, MPEGTS_PCR);
560 }
561
562 353 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
563 {
564 int pid;
565
566 353 pid = filter->pid;
567
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 353 if (filter->type == MPEGTS_SECTION)
568 227 av_freep(&filter->u.section_filter.section_buf);
569
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 126 else if (filter->type == MPEGTS_PES) {
570 126 PESContext *pes = filter->u.pes_filter.opaque;
571 126 av_buffer_unref(&pes->buffer);
572 /* referenced private data will be freed later in
573 * avformat_close_input (pes->st->priv_data == pes) */
574
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 126 if (!pes->st || pes->merged_st) {
575 21 av_freep(&filter->u.pes_filter.opaque);
576 }
577 }
578
579 353 av_free(filter);
580 353 ts->pids[pid] = NULL;
581 353 }
582
583 72537 static int analyze(const uint8_t *buf, int size, int packet_size,
584 int probe)
585 {
586 int stat[TS_MAX_PACKET_SIZE];
587 72537 int stat_all = 0;
588 int i;
589 72537 int best_score = 0;
590
591 72537 memset(stat, 0, packet_size * sizeof(*stat));
592
593
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 1109087598 for (i = 0; i < size - 3; i++) {
594
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 1109015061 if (buf[i] == SYNC_BYTE) {
595 1961363 int pid = AV_RB16(buf+1) & 0x1FFF;
596 1961363 int asc = buf[i + 3] & 0x30;
597
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 1961363 if (!probe || pid == 0x1FFF || asc) {
598 1616054 int x = i % packet_size;
599 1616054 stat[x]++;
600 1616054 stat_all++;
601
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 1616054 if (stat[x] > best_score) {
602 120821 best_score = stat[x];
603 }
604 }
605 }
606 }
607
608 72537 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
609 }
610
611 /* autodetect fec presence */
612 114 static int get_packet_size(AVFormatContext* s)
613 {
614 int score, fec_score, dvhs_score;
615 int margin;
616 int ret;
617
618 /*init buffer to store stream for probing */
619 114 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
620 114 int buf_size = 0;
621 114 int max_iterations = 16;
622
623
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 114 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
624 114 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
625
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 114 if (ret < 0)
626 ✗ return AVERROR_INVALIDDATA;
627 114 buf_size += ret;
628
629 114 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
630 114 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
631 114 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
632 114 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
633 buf_size, score, dvhs_score, fec_score);
634
635 114 margin = mid_pred(score, fec_score, dvhs_score);
636
637
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 114 if (buf_size < PROBE_PACKET_MAX_BUF)
638 1 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
639
640
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 114 if (score > margin)
641 114 return TS_PACKET_SIZE;
642 ✗ else if (dvhs_score > margin)
643 ✗ return TS_DVHS_PACKET_SIZE;
644 ✗ else if (fec_score > margin)
645 ✗ return TS_FEC_PACKET_SIZE;
646 }
647 ✗ return AVERROR_INVALIDDATA;
648 }
649
650 typedef struct SectionHeader {
651 uint8_t tid;
652 uint16_t id;
653 uint8_t version;
654 uint8_t current_next;
655 uint8_t sec_num;
656 uint8_t last_sec_num;
657 } SectionHeader;
658
659 5779 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
660 {
661
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 5779 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
662 5195 return 1;
663
664 584 tssf->last_ver = h->version;
665 584 tssf->last_crc = tssf->crc;
666
667 584 return 0;
668 }
669
670 31606 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
671 {
672 const uint8_t *p;
673 int c;
674
675 31606 p = *pp;
676
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 31606 if (p >= p_end)
677 1461 return AVERROR_INVALIDDATA;
678 30145 c = *p++;
679 30145 *pp = p;
680 30145 return c;
681 }
682
683 9719 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
684 {
685 const uint8_t *p;
686 int c;
687
688 9719 p = *pp;
689
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 9719 if (1 >= p_end - p)
690 313 return AVERROR_INVALIDDATA;
691 9406 c = AV_RB16(p);
692 9406 p += 2;
693 9406 *pp = p;
694 9406 return c;
695 }
696
697 /* read and allocate a DVB string preceded by its length */
698 200 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
699 {
700 int len;
701 const uint8_t *p;
702 char *str;
703
704 200 p = *pp;
705 200 len = get8(&p, p_end);
706
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 200 if (len < 0)
707 ✗ return NULL;
708
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 200 if (len > p_end - p)
709 ✗ return NULL;
710 #if CONFIG_ICONV
711
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 200 if (len) {
712 200 const char *encodings[] = {
713 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
714 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
715 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
716 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
717 "", "", "", "", "", "", "", ""
718 };
719 iconv_t cd;
720 char *in, *out;
721 200 size_t inlen = len, outlen = inlen * 6 + 1;
722
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 200 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
723 char iso8859[12];
724 ✗ snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
725 ✗ inlen -= 3;
726 ✗ in = (char *)p + 3;
727 ✗ cd = iconv_open("UTF-8", iso8859);
728
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 200 } else if (p[0] < 0x20) {
729 8 inlen -= 1;
730 8 in = (char *)p + 1;
731 8 cd = iconv_open("UTF-8", encodings[*p]);
732 } else {
733 192 in = (char *)p;
734 192 cd = iconv_open("UTF-8", encodings[0]);
735 }
736
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 200 if (cd == (iconv_t)-1)
737 ✗ goto no_iconv;
738 200 str = out = av_malloc(outlen);
739
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 200 if (!str) {
740 ✗ iconv_close(cd);
741 200 return NULL;
742 }
743
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 200 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
744 ✗ iconv_close(cd);
745 ✗ av_freep(&str);
746 ✗ goto no_iconv;
747 }
748 200 iconv_close(cd);
749 200 *out = 0;
750 200 *pp = p + len;
751 200 return str;
752 }
753 ✗ no_iconv:
754 #endif
755 ✗ str = av_malloc(len + 1);
756 ✗ if (!str)
757 ✗ return NULL;
758 ✗ memcpy(str, p, len);
759 ✗ str[len] = '\0';
760 ✗ p += len;
761 ✗ *pp = p;
762 ✗ return str;
763 }
764
765 6457 static int parse_section_header(SectionHeader *h,
766 const uint8_t **pp, const uint8_t *p_end)
767 {
768 int val;
769
770 6457 val = get8(pp, p_end);
771
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 6457 if (val < 0)
772 ✗ return val;
773 6457 h->tid = val;
774 6457 *pp += 2;
775 6457 val = get16(pp, p_end);
776
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 6457 if (val < 0)
777 ✗ return val;
778 6457 h->id = val;
779 6457 val = get8(pp, p_end);
780
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 6457 if (val < 0)
781 ✗ return val;
782 6457 h->version = (val >> 1) & 0x1f;
783 6457 h->current_next = val & 0x01;
784 6457 val = get8(pp, p_end);
785
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 6457 if (val < 0)
786 ✗ return val;
787 6457 h->sec_num = val;
788 6457 val = get8(pp, p_end);
789
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 6457 if (val < 0)
790 ✗ return val;
791 6457 h->last_sec_num = val;
792 6457 return 0;
793 }
794
795 typedef struct StreamType {
796 uint32_t stream_type;
797 enum AVMediaType codec_type;
798 enum AVCodecID codec_id;
799 } StreamType;
800
801 static const StreamType ISO_types[] = {
802 { STREAM_TYPE_VIDEO_MPEG1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
803 { STREAM_TYPE_VIDEO_MPEG2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
804 { STREAM_TYPE_AUDIO_MPEG1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
805 { STREAM_TYPE_AUDIO_MPEG2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
806 { STREAM_TYPE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
807 { STREAM_TYPE_VIDEO_MPEG4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
808 /* Makito encoder sets stream type 0x11 for AAC,
809 * so auto-detect LOAS/LATM instead of hardcoding it. */
810 #if !CONFIG_LOAS_DEMUXER
811 { STREAM_TYPE_AUDIO_AAC_LATM, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
812 #endif
813 { STREAM_TYPE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
814 { STREAM_TYPE_AUDIO_MPEG4, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
815 { STREAM_TYPE_VIDEO_MVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
816 { STREAM_TYPE_VIDEO_JPEG2000, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
817 { STREAM_TYPE_VIDEO_HEVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
818 { STREAM_TYPE_VIDEO_VVC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
819 { STREAM_TYPE_VIDEO_CAVS, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
820 { STREAM_TYPE_VIDEO_DIRAC, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
821 { STREAM_TYPE_VIDEO_AVS2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
822 { STREAM_TYPE_VIDEO_AVS3, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
823 { STREAM_TYPE_VIDEO_VC1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
824 { 0 },
825 };
826
827 static const StreamType HDMV_types[] = {
828 { STREAM_TYPE_BLURAY_AUDIO_PCM_BLURAY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
829 { STREAM_TYPE_BLURAY_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
830 { STREAM_TYPE_BLURAY_AUDIO_DTS, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
831 { STREAM_TYPE_BLURAY_AUDIO_TRUEHD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
832 { STREAM_TYPE_BLURAY_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
833 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
834 { STREAM_TYPE_BLURAY_AUDIO_DTS_HD_MASTER, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
835 { STREAM_TYPE_BLURAY_AUDIO_EAC3_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
836 { STREAM_TYPE_BLURAY_AUDIO_DTS_EXPRESS_SECONDARY, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
837 { STREAM_TYPE_BLURAY_SUBTITLE_PGS, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
838 { STREAM_TYPE_BLURAY_SUBTITLE_TEXT, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
839 { 0 },
840 };
841
842 /* SCTE types */
843 static const StreamType SCTE_types[] = {
844 { STREAM_TYPE_SCTE_DATA_SCTE_35, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
845 { 0 },
846 };
847
848 /* ATSC ? */
849 static const StreamType MISC_types[] = {
850 { STREAM_TYPE_ATSC_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
851 { STREAM_TYPE_ATSC_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
852 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
853 { 0 },
854 };
855
856 /* HLS Sample Encryption Types */
857 static const StreamType HLS_SAMPLE_ENC_types[] = {
858 { STREAM_TYPE_HLS_SE_VIDEO_H264, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
859 { STREAM_TYPE_HLS_SE_AUDIO_AAC, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
860 { STREAM_TYPE_HLS_SE_AUDIO_AC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
861 { STREAM_TYPE_HLS_SE_AUDIO_EAC3, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
862 { 0 },
863 };
864
865 static const StreamType REGD_types[] = {
866 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
867 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
868 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
869 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
870 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
871 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
872 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
873 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
874 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
875 { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
876 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
877 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
878 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
879 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
880 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
881 { 0 },
882 };
883
884 static const StreamType METADATA_types[] = {
885 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
886 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
887 { 0 },
888 };
889
890 /* descriptor present */
891 static const StreamType DESC_types[] = {
892 { AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
893 { ENHANCED_AC3_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
894 { DTS_DESCRIPTOR, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
895 { TELETEXT_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
896 { SUBTITLING_DESCRIPTOR, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE },
897 { 0 },
898 };
899
900 165 static void mpegts_find_stream_type(AVStream *st,
901 uint32_t stream_type,
902 const StreamType *types)
903 {
904 165 FFStream *const sti = ffstream(st);
905
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 955 for (; types->stream_type; types++)
906
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 902 if (stream_type == types->stream_type) {
907
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 112 if (st->codecpar->codec_type != types->codec_type ||
908
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 10 st->codecpar->codec_id != types->codec_id) {
909 111 st->codecpar->codec_type = types->codec_type;
910 111 st->codecpar->codec_id = types->codec_id;
911 111 sti->need_context_update = 1;
912 }
913 112 sti->request_probe = 0;
914 112 return;
915 }
916 }
917
918 105 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
919 uint32_t stream_type, uint32_t prog_reg_desc)
920 {
921 105 FFStream *const sti = ffstream(st);
922 105 int old_codec_type = st->codecpar->codec_type;
923 105 int old_codec_id = st->codecpar->codec_id;
924 105 int old_codec_tag = st->codecpar->codec_tag;
925
926 105 avpriv_set_pts_info(st, 33, 1, 90000);
927 105 st->priv_data = pes;
928 105 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
929 105 st->codecpar->codec_id = AV_CODEC_ID_NONE;
930 105 sti->need_parsing = AVSTREAM_PARSE_FULL;
931 105 pes->st = st;
932 105 pes->stream_type = stream_type;
933
934 105 av_log(pes->stream, AV_LOG_DEBUG,
935 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
936 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
937
938 105 st->codecpar->codec_tag = pes->stream_type;
939
940 105 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
941
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 105 if (pes->stream_type == STREAM_TYPE_AUDIO_MPEG2 || pes->stream_type == STREAM_TYPE_AUDIO_AAC)
942 7 sti->request_probe = 50;
943
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 105 if ((prog_reg_desc == AV_RL32("HDMV") ||
944
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 105 prog_reg_desc == AV_RL32("HDPR")) &&
945 ✗ st->codecpar->codec_id == AV_CODEC_ID_NONE) {
946 ✗ mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
947 ✗ if (pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD) {
948 // HDMV TrueHD streams also contain an AC3 coded version of the
949 // audio track - add a second stream for this
950 AVStream *sub_st;
951 // priv_data cannot be shared between streams
952 ✗ PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
953 ✗ if (!sub_pes)
954 ✗ return AVERROR(ENOMEM);
955
956 ✗ sub_st = avformat_new_stream(pes->stream, NULL);
957 ✗ if (!sub_st) {
958 ✗ av_free(sub_pes);
959 ✗ return AVERROR(ENOMEM);
960 }
961
962 ✗ sub_st->id = pes->pid;
963 ✗ avpriv_set_pts_info(sub_st, 33, 1, 90000);
964 ✗ sub_st->priv_data = sub_pes;
965 ✗ sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
966 ✗ sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
967 ✗ ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
968 ✗ sub_pes->sub_st = pes->sub_st = sub_st;
969 }
970 }
971
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
972 29 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
973
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
974 8 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
975
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 105 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
976 8 st->codecpar->codec_id = old_codec_id;
977 8 st->codecpar->codec_type = old_codec_type;
978 }
979
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 105 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
980
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 97 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
981
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 8 sti->probe_packets > 0 &&
982 stream_type == STREAM_TYPE_PRIVATE_DATA) {
983 5 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
984 5 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
985 5 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
986 }
987
988 /* queue a context update if properties changed */
989
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 105 if (old_codec_type != st->codecpar->codec_type ||
990
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 3 old_codec_id != st->codecpar->codec_id ||
991
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 3 old_codec_tag != st->codecpar->codec_tag)
992 105 sti->need_context_update = 1;
993
994 105 return 0;
995 }
996
997 55786 static void reset_pes_packet_state(PESContext *pes)
998 {
999 55786 pes->pts = AV_NOPTS_VALUE;
1000 55786 pes->dts = AV_NOPTS_VALUE;
1001 55786 pes->data_index = 0;
1002 55786 pes->flags = 0;
1003 55786 av_buffer_unref(&pes->buffer);
1004 55786 }
1005
1006 12 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1007 {
1008 12 av_packet_unref(pkt);
1009 12 pkt->data = (uint8_t *)buffer;
1010 12 pkt->size = len;
1011 12 }
1012
1013 28968 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1014 {
1015 uint8_t *sd;
1016
1017 28968 av_packet_unref(pkt);
1018
1019 28968 pkt->buf = pes->buffer;
1020 28968 pkt->data = pes->buffer->data;
1021 28968 pkt->size = pes->data_index;
1022
1023
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 28968 if (pes->PES_packet_length &&
1024
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 26045 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1025 PES_START_SIZE) {
1026 91 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1027 91 pes->flags |= AV_PKT_FLAG_CORRUPT;
1028 }
1029 28968 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1030
1031 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1032
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 28968 if (pes->sub_st && pes->stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD && pes->extended_stream_id == 0x76)
1033 ✗ pkt->stream_index = pes->sub_st->index;
1034 else
1035 28968 pkt->stream_index = pes->st->index;
1036 28968 pkt->pts = pes->pts;
1037 28968 pkt->dts = pes->dts;
1038 /* store position of first TS packet of this PES packet */
1039 28968 pkt->pos = pes->ts_packet_pos;
1040 28968 pkt->flags = pes->flags;
1041
1042 28968 pes->buffer = NULL;
1043 28968 reset_pes_packet_state(pes);
1044
1045 28968 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1046
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 28968 if (!sd)
1047 ✗ return AVERROR(ENOMEM);
1048 28968 *sd = pes->stream_id;
1049
1050 28968 return 0;
1051 }
1052
1053 ✗ static uint64_t get_ts64(GetBitContext *gb, int bits)
1054 {
1055 ✗ if (get_bits_left(gb) < bits)
1056 ✗ return AV_NOPTS_VALUE;
1057 ✗ return get_bits64(gb, bits);
1058 }
1059
1060 ✗ static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1061 const uint8_t *buf, int buf_size)
1062 {
1063 GetBitContext gb;
1064 ✗ int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1065 ✗ int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1066 ✗ int dts_flag = -1, cts_flag = -1;
1067 ✗ int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1068 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1069 ✗ int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1070
1071 ✗ memcpy(buf_padded, buf, buf_padded_size);
1072
1073 ✗ init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1074
1075 ✗ if (sl->use_au_start)
1076 ✗ au_start_flag = get_bits1(&gb);
1077 ✗ if (sl->use_au_end)
1078 ✗ au_end_flag = get_bits1(&gb);
1079 ✗ if (!sl->use_au_start && !sl->use_au_end)
1080 ✗ au_start_flag = au_end_flag = 1;
1081 ✗ if (sl->ocr_len > 0)
1082 ✗ ocr_flag = get_bits1(&gb);
1083 ✗ if (sl->use_idle)
1084 ✗ idle_flag = get_bits1(&gb);
1085 ✗ if (sl->use_padding)
1086 ✗ padding_flag = get_bits1(&gb);
1087 ✗ if (padding_flag)
1088 ✗ padding_bits = get_bits(&gb, 3);
1089
1090 ✗ if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1091 ✗ if (sl->packet_seq_num_len)
1092 ✗ skip_bits_long(&gb, sl->packet_seq_num_len);
1093 ✗ if (sl->degr_prior_len)
1094 ✗ if (get_bits1(&gb))
1095 ✗ skip_bits(&gb, sl->degr_prior_len);
1096 ✗ if (ocr_flag)
1097 ✗ skip_bits_long(&gb, sl->ocr_len);
1098 ✗ if (au_start_flag) {
1099 ✗ if (sl->use_rand_acc_pt)
1100 ✗ get_bits1(&gb);
1101 ✗ if (sl->au_seq_num_len > 0)
1102 ✗ skip_bits_long(&gb, sl->au_seq_num_len);
1103 ✗ if (sl->use_timestamps) {
1104 ✗ dts_flag = get_bits1(&gb);
1105 ✗ cts_flag = get_bits1(&gb);
1106 }
1107 }
1108 ✗ if (sl->inst_bitrate_len)
1109 ✗ inst_bitrate_flag = get_bits1(&gb);
1110 ✗ if (dts_flag == 1)
1111 ✗ dts = get_ts64(&gb, sl->timestamp_len);
1112 ✗ if (cts_flag == 1)
1113 ✗ cts = get_ts64(&gb, sl->timestamp_len);
1114 ✗ if (sl->au_len > 0)
1115 ✗ skip_bits_long(&gb, sl->au_len);
1116 ✗ if (inst_bitrate_flag)
1117 ✗ skip_bits_long(&gb, sl->inst_bitrate_len);
1118 }
1119
1120 ✗ if (dts != AV_NOPTS_VALUE)
1121 ✗ pes->dts = dts;
1122 ✗ if (cts != AV_NOPTS_VALUE)
1123 ✗ pes->pts = cts;
1124
1125 ✗ if (sl->timestamp_len && sl->timestamp_res)
1126 ✗ avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1127
1128 ✗ return (get_bits_count(&gb) + 7) >> 3;
1129 }
1130
1131 29069 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1132 {
1133 29069 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1134
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 29069 if (!ts->pools[index]) {
1135
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 158 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1136 158 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1137
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 158 if (!ts->pools[index])
1138 ✗ return NULL;
1139 }
1140 29069 return av_buffer_pool_get(ts->pools[index]);
1141 }
1142
1143 /* return non zero if a packet could be constructed */
1144 374521 static int mpegts_push_data(MpegTSFilter *filter,
1145 const uint8_t *buf, int buf_size, int is_start,
1146 int64_t pos)
1147 {
1148 374521 PESContext *pes = filter->u.pes_filter.opaque;
1149 374521 MpegTSContext *ts = pes->ts;
1150 const uint8_t *p;
1151 int ret, len;
1152
1153
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 374521 if (!ts->pkt)
1154 ✗ return 0;
1155
1156
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 374521 if (is_start) {
1157
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 29669 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1158 2851 ret = new_pes_packet(pes, ts->pkt);
1159
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 2851 if (ret < 0)
1160 ✗ return ret;
1161 2851 ts->stop_parse = 1;
1162 } else {
1163 26818 reset_pes_packet_state(pes);
1164 }
1165 29669 pes->state = MPEGTS_HEADER;
1166 29669 pes->ts_packet_pos = pos;
1167 }
1168 374521 p = buf;
1169
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 1211368 while (buf_size > 0) {
1170
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 462326 switch (pes->state) {
1171 29669 case MPEGTS_HEADER:
1172 29669 len = PES_START_SIZE - pes->data_index;
1173
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 29669 if (len > buf_size)
1174 2 len = buf_size;
1175 29669 memcpy(pes->header + pes->data_index, p, len);
1176 29669 pes->data_index += len;
1177 29669 p += len;
1178 29669 buf_size -= len;
1179
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 29669 if (pes->data_index == PES_START_SIZE) {
1180 /* we got all the PES or section header. We can now
1181 * decide */
1182
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 29667 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1183
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 29660 pes->header[2] == 0x01) {
1184 /* it must be an MPEG-2 PES stream */
1185 29660 pes->stream_id = pes->header[3];
1186 29660 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1187
1188
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 29660 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1189
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 591 (!pes->sub_st ||
1190 ✗ pes->sub_st->discard == AVDISCARD_ALL)) ||
1191
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 29069 pes->stream_id == STREAM_ID_PADDING_STREAM)
1192 591 goto skip;
1193
1194 /* stream not present in PMT */
1195
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 29069 if (!pes->st) {
1196 ✗ if (ts->skip_changes)
1197 ✗ goto skip;
1198 ✗ if (ts->merge_pmt_versions)
1199 ✗ goto skip; /* wait for PMT to merge new stream */
1200
1201 ✗ pes->st = avformat_new_stream(ts->stream, NULL);
1202 ✗ if (!pes->st)
1203 ✗ return AVERROR(ENOMEM);
1204 ✗ pes->st->id = pes->pid;
1205 ✗ mpegts_set_stream_info(pes->st, pes, 0, 0);
1206 }
1207
1208 29069 pes->PES_packet_length = AV_RB16(pes->header + 4);
1209 /* NOTE: zero length means the PES size is unbounded */
1210
1211
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 29069 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1212
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 29069 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1213
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 29069 pes->stream_id != STREAM_ID_ECM_STREAM &&
1214
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 29069 pes->stream_id != STREAM_ID_EMM_STREAM &&
1215
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 29069 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1216
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 29069 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1217
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 58138 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1218 29069 FFStream *const pes_sti = ffstream(pes->st);
1219 29069 pes->state = MPEGTS_PESHEADER;
1220
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 29069 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1221 2 av_log(pes->stream, AV_LOG_TRACE,
1222 "pid=%x stream_type=%x probing\n",
1223 pes->pid,
1224 pes->stream_type);
1225 2 pes_sti->request_probe = 1;
1226 }
1227 } else {
1228 ✗ pes->pes_header_size = 6;
1229 ✗ pes->state = MPEGTS_PAYLOAD;
1230 ✗ pes->data_index = 0;
1231 }
1232 } else {
1233 /* otherwise, it should be a table */
1234 /* skip packet */
1235 7 skip:
1236 598 pes->state = MPEGTS_SKIP;
1237 598 continue;
1238 }
1239 }
1240 29071 break;
1241 /**********************************************/
1242 /* PES packing parsing */
1243 29069 case MPEGTS_PESHEADER:
1244 29069 len = PES_HEADER_SIZE - pes->data_index;
1245
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 29069 if (len < 0)
1246 ✗ return AVERROR_INVALIDDATA;
1247
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 29069 if (len > buf_size)
1248 ✗ len = buf_size;
1249 29069 memcpy(pes->header + pes->data_index, p, len);
1250 29069 pes->data_index += len;
1251 29069 p += len;
1252 29069 buf_size -= len;
1253
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 29069 if (pes->data_index == PES_HEADER_SIZE) {
1254 29069 pes->pes_header_size = pes->header[8] + 9;
1255 29069 pes->state = MPEGTS_PESHEADER_FILL;
1256 }
1257 29069 break;
1258 29069 case MPEGTS_PESHEADER_FILL:
1259 29069 len = pes->pes_header_size - pes->data_index;
1260
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 29069 if (len < 0)
1261 ✗ return AVERROR_INVALIDDATA;
1262
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 29069 if (len > buf_size)
1263 ✗ len = buf_size;
1264 29069 memcpy(pes->header + pes->data_index, p, len);
1265 29069 pes->data_index += len;
1266 29069 p += len;
1267 29069 buf_size -= len;
1268
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 29069 if (pes->data_index == pes->pes_header_size) {
1269 const uint8_t *r;
1270 unsigned int flags, pes_ext, skip;
1271
1272 29069 flags = pes->header[7];
1273 29069 r = pes->header + 9;
1274 29069 pes->pts = AV_NOPTS_VALUE;
1275 29069 pes->dts = AV_NOPTS_VALUE;
1276
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 29069 if ((flags & 0xc0) == 0x80) {
1277 10083 pes->dts = pes->pts = ff_parse_pes_pts(r);
1278 10083 r += 5;
1279
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 18986 } else if ((flags & 0xc0) == 0xc0) {
1280 1854 pes->pts = ff_parse_pes_pts(r);
1281 1854 r += 5;
1282 1854 pes->dts = ff_parse_pes_pts(r);
1283 1854 r += 5;
1284 }
1285 29069 pes->extended_stream_id = -1;
1286
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 29069 if (flags & 0x01) { /* PES extension */
1287 ✗ pes_ext = *r++;
1288 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1289 ✗ skip = (pes_ext >> 4) & 0xb;
1290 ✗ skip += skip & 0x9;
1291 ✗ r += skip;
1292 ✗ if ((pes_ext & 0x41) == 0x01 &&
1293 ✗ (r + 2) <= (pes->header + pes->pes_header_size)) {
1294 /* PES extension 2 */
1295 ✗ if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1296 ✗ pes->extended_stream_id = r[1];
1297 }
1298 }
1299
1300 /* we got the full header. We parse it and get the payload */
1301 29069 pes->state = MPEGTS_PAYLOAD;
1302 29069 pes->data_index = 0;
1303
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 29069 if (pes->stream_type == STREAM_TYPE_ISO_IEC_14496_PES && buf_size > 0) {
1304 ✗ int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1305 buf_size);
1306 ✗ pes->pes_header_size += sl_header_bytes;
1307 ✗ p += sl_header_bytes;
1308 ✗ buf_size -= sl_header_bytes;
1309 }
1310
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 29069 if (pes->stream_type == STREAM_TYPE_METADATA &&
1311
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 6 pes->stream_id == STREAM_ID_METADATA_STREAM &&
1312 ✗ pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV &&
1313 buf_size >= 5) {
1314 /* skip metadata access unit header - see MISB ST 1402 */
1315 ✗ pes->pes_header_size += 5;
1316 ✗ p += 5;
1317 ✗ buf_size -= 5;
1318 }
1319
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 29069 if ( pes->ts->fix_teletext_pts
1320
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✗ Branch 1 not taken.
 29069 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1321
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✓ Branch 1 taken 28809 times.
 29069 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1322 ) {
1323 260 AVProgram *p = NULL;
1324 260 int pcr_found = 0;
1325
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✓ Branch 2 taken 260 times.
 520 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1326
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 260 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1327 260 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1328
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 260 if (f) {
1329 260 AVStream *st = NULL;
1330
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✗ Branch 1 not taken.
 260 if (f->type == MPEGTS_PES) {
1331 260 PESContext *pcrpes = f->u.pes_filter.opaque;
1332
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✗ Branch 1 not taken.
 260 if (pcrpes)
1333 260 st = pcrpes->st;
1334 ✗ } else if (f->type == MPEGTS_PCR) {
1335 int i;
1336 ✗ for (i = 0; i < p->nb_stream_indexes; i++) {
1337 ✗ AVStream *pst = pes->stream->streams[p->stream_index[i]];
1338 ✗ if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1339 ✗ st = pst;
1340 }
1341 }
1342
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 260 if (f->last_pcr != -1 && !f->discard) {
1343 // teletext packets do not always have correct timestamps,
1344 // the standard says they should be handled after 40.6 ms at most,
1345 // and the pcr error to this packet should be no more than 100 ms.
1346 // TODO: we should interpolate the PCR, not just use the last one
1347 ✗ int64_t pcr = f->last_pcr / SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1348 ✗ pcr_found = 1;
1349 ✗ if (st) {
1350 ✗ const FFStream *const sti = ffstream(st);
1351 ✗ FFStream *const pes_sti = ffstream(pes->st);
1352
1353 ✗ pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1354 ✗ pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1355 }
1356 ✗ if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1357 ✗ pes->pts = pes->dts = pcr;
1358 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1359 ✗ pes->dts > pcr + 3654 + 9000) {
1360 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1361 ✗ } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1362 ✗ pes->dts > pcr + 10*90000) { //10sec
1363 ✗ pes->pts = pes->dts = pcr + 3654 + 9000;
1364 }
1365 ✗ break;
1366 }
1367 }
1368 }
1369 }
1370
1371
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 260 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1372 !pcr_found) {
1373 ✗ av_log(pes->stream, AV_LOG_VERBOSE,
1374 "Forcing DTS/PTS to be unset for a "
1375 "non-trustworthy PES packet for PID %d as "
1376 "PCR hasn't been received yet.\n",
1377 pes->pid);
1378 ✗ pes->dts = pes->pts = AV_NOPTS_VALUE;
1379 }
1380 }
1381 }
1382 29069 break;
1383 355977 case MPEGTS_PAYLOAD:
1384 do {
1385 355977 int max_packet_size = ts->max_packet_size;
1386
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 355977 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1387 195721 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1388
1389
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 355977 if (pes->data_index > 0 &&
1390
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 326908 pes->data_index + buf_size > max_packet_size) {
1391 ✗ ret = new_pes_packet(pes, ts->pkt);
1392 ✗ if (ret < 0)
1393 ✗ return ret;
1394 ✗ pes->PES_packet_length = 0;
1395 ✗ max_packet_size = ts->max_packet_size;
1396 ✗ ts->stop_parse = 1;
1397
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 355977 } else if (pes->data_index == 0 &&
1398 buf_size > max_packet_size) {
1399 // pes packet size is < ts size packet and pes data is padded with STUFFING_BYTE
1400 // not sure if this is legal in ts but see issue #2392
1401 ✗ buf_size = max_packet_size;
1402 }
1403
1404
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 355977 if (!pes->buffer) {
1405 29069 pes->buffer = buffer_pool_get(ts, max_packet_size);
1406
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 29069 if (!pes->buffer)
1407 ✗ return AVERROR(ENOMEM);
1408 }
1409
1410 355977 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1411 355977 pes->data_index += buf_size;
1412 /* emit complete packets with known packet size
1413 * decreases demuxer delay for infrequent packets like subtitles from
1414 * a couple of seconds to milliseconds for properly muxed files. */
1415
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 355977 if (!ts->stop_parse && pes->PES_packet_length &&
1416
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 195721 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1417 25954 ts->stop_parse = 1;
1418 25954 ret = new_pes_packet(pes, ts->pkt);
1419 25954 pes->state = MPEGTS_SKIP;
1420
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 25954 if (ret < 0)
1421 ✗ return ret;
1422 }
1423 } while (0);
1424 355977 buf_size = 0;
1425 355977 break;
1426 18542 case MPEGTS_SKIP:
1427 18542 buf_size = 0;
1428 18542 break;
1429 }
1430 }
1431
1432 374521 return 0;
1433 }
1434
1435 126 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1436 {
1437 MpegTSFilter *tss;
1438 PESContext *pes;
1439
1440 /* if no pid found, then add a pid context */
1441 126 pes = av_mallocz(sizeof(PESContext));
1442
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 126 if (!pes)
1443 ✗ return 0;
1444 126 pes->ts = ts;
1445 126 pes->stream = ts->stream;
1446 126 pes->pid = pid;
1447 126 pes->pcr_pid = pcr_pid;
1448 126 pes->state = MPEGTS_SKIP;
1449 126 pes->pts = AV_NOPTS_VALUE;
1450 126 pes->dts = AV_NOPTS_VALUE;
1451 126 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1452
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 126 if (!tss) {
1453 ✗ av_free(pes);
1454 ✗ return 0;
1455 }
1456 126 return pes;
1457 }
1458
1459 #define MAX_LEVEL 4
1460 typedef struct MP4DescrParseContext {
1461 AVFormatContext *s;
1462 FFIOContext pb;
1463 Mp4Descr *descr;
1464 Mp4Descr *active_descr;
1465 int descr_count;
1466 int max_descr_count;
1467 int level;
1468 int predefined_SLConfigDescriptor_seen;
1469 } MP4DescrParseContext;
1470
1471 ✗ static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1472 const uint8_t *buf, unsigned size,
1473 Mp4Descr *descr, int max_descr_count)
1474 {
1475 ✗ if (size > (1 << 30))
1476 ✗ return AVERROR_INVALIDDATA;
1477
1478 ✗ ffio_init_read_context(&d->pb, buf, size);
1479
1480 ✗ d->s = s;
1481 ✗ d->level = 0;
1482 ✗ d->descr_count = 0;
1483 ✗ d->descr = descr;
1484 ✗ d->active_descr = NULL;
1485 ✗ d->max_descr_count = max_descr_count;
1486
1487 ✗ return 0;
1488 }
1489
1490 ✗ static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1491 {
1492 ✗ int64_t new_off = avio_tell(pb);
1493 ✗ (*len) -= new_off - *off;
1494 ✗ *off = new_off;
1495 ✗ }
1496
1497 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1498 int target_tag);
1499
1500 ✗ static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1501 {
1502 ✗ while (len > 0) {
1503 ✗ int ret = parse_mp4_descr(d, off, len, 0);
1504 ✗ if (ret < 0)
1505 ✗ return ret;
1506 ✗ update_offsets(&d->pb.pub, &off, &len);
1507 }
1508 ✗ return 0;
1509 }
1510
1511 ✗ static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1512 {
1513 ✗ AVIOContext *const pb = &d->pb.pub;
1514 ✗ avio_rb16(pb); // ID
1515 ✗ avio_r8(pb);
1516 ✗ avio_r8(pb);
1517 ✗ avio_r8(pb);
1518 ✗ avio_r8(pb);
1519 ✗ avio_r8(pb);
1520 ✗ update_offsets(pb, &off, &len);
1521 ✗ return parse_mp4_descr_arr(d, off, len);
1522 }
1523
1524 ✗ static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1525 {
1526 int id_flags;
1527 ✗ if (len < 2)
1528 ✗ return 0;
1529 ✗ id_flags = avio_rb16(&d->pb.pub);
1530 ✗ if (!(id_flags & 0x0020)) { // URL_Flag
1531 ✗ update_offsets(&d->pb.pub, &off, &len);
1532 ✗ return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1533 } else {
1534 ✗ return 0;
1535 }
1536 }
1537
1538 ✗ static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1539 {
1540 ✗ AVIOContext *const pb = &d->pb.pub;
1541 ✗ int es_id = 0;
1542 ✗ int ret = 0;
1543
1544 ✗ if (d->descr_count >= d->max_descr_count)
1545 ✗ return AVERROR_INVALIDDATA;
1546 ✗ ff_mp4_parse_es_descr(pb, &es_id);
1547 ✗ d->active_descr = d->descr + (d->descr_count++);
1548
1549 ✗ d->active_descr->es_id = es_id;
1550 ✗ update_offsets(pb, &off, &len);
1551 ✗ if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1552 ✗ return ret;
1553 ✗ update_offsets(pb, &off, &len);
1554 ✗ if (len > 0)
1555 ✗ ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1556 ✗ d->active_descr = NULL;
1557 ✗ return ret;
1558 }
1559
1560 ✗ static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1561 int len)
1562 {
1563 ✗ Mp4Descr *descr = d->active_descr;
1564 ✗ if (!descr)
1565 ✗ return AVERROR_INVALIDDATA;
1566 ✗ d->active_descr->dec_config_descr = av_malloc(len);
1567 ✗ if (!descr->dec_config_descr)
1568 ✗ return AVERROR(ENOMEM);
1569 ✗ descr->dec_config_descr_len = len;
1570 ✗ avio_read(&d->pb.pub, descr->dec_config_descr, len);
1571 ✗ return 0;
1572 }
1573
1574 ✗ static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1575 {
1576 ✗ Mp4Descr *descr = d->active_descr;
1577 ✗ AVIOContext *const pb = &d->pb.pub;
1578 int predefined;
1579 ✗ if (!descr)
1580 ✗ return AVERROR_INVALIDDATA;
1581
1582 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1583 descr->sl.dst = avio_r8(pb); \
1584 if (descr->sl.dst > maxv) { \
1585 descr->sl.dst = maxv; \
1586 return AVERROR_INVALIDDATA; \
1587 } \
1588 } while (0)
1589
1590 ✗ predefined = avio_r8(pb);
1591 ✗ if (!predefined) {
1592 int lengths;
1593 ✗ int flags = avio_r8(pb);
1594 ✗ descr->sl.use_au_start = !!(flags & 0x80);
1595 ✗ descr->sl.use_au_end = !!(flags & 0x40);
1596 ✗ descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1597 ✗ descr->sl.use_padding = !!(flags & 0x08);
1598 ✗ descr->sl.use_timestamps = !!(flags & 0x04);
1599 ✗ descr->sl.use_idle = !!(flags & 0x02);
1600 ✗ descr->sl.timestamp_res = avio_rb32(pb);
1601 ✗ avio_rb32(pb);
1602 ✗ R8_CHECK_CLIP_MAX(timestamp_len, 63);
1603 ✗ R8_CHECK_CLIP_MAX(ocr_len, 63);
1604 ✗ R8_CHECK_CLIP_MAX(au_len, 31);
1605 ✗ descr->sl.inst_bitrate_len = avio_r8(pb);
1606 ✗ lengths = avio_rb16(pb);
1607 ✗ descr->sl.degr_prior_len = lengths >> 12;
1608 ✗ descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1609 ✗ descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1610 ✗ } else if (!d->predefined_SLConfigDescriptor_seen){
1611 ✗ avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1612 ✗ d->predefined_SLConfigDescriptor_seen = 1;
1613 }
1614 ✗ return 0;
1615 }
1616
1617 ✗ static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1618 int target_tag)
1619 {
1620 int tag;
1621 ✗ AVIOContext *const pb = &d->pb.pub;
1622 ✗ int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1623 ✗ int ret = 0;
1624
1625 ✗ update_offsets(pb, &off, &len);
1626 ✗ if (len < 0 || len1 > len || len1 <= 0) {
1627 ✗ av_log(d->s, AV_LOG_ERROR,
1628 "Tag %x length violation new length %d bytes remaining %d\n",
1629 tag, len1, len);
1630 ✗ return AVERROR_INVALIDDATA;
1631 }
1632
1633 ✗ if (d->level++ >= MAX_LEVEL) {
1634 ✗ av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1635 ✗ ret = AVERROR_INVALIDDATA;
1636 ✗ goto done;
1637 }
1638
1639 ✗ if (target_tag && tag != target_tag) {
1640 ✗ av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1641 target_tag);
1642 ✗ ret = AVERROR_INVALIDDATA;
1643 ✗ goto done;
1644 }
1645
1646 ✗ switch (tag) {
1647 ✗ case MP4IODescrTag:
1648 ✗ ret = parse_MP4IODescrTag(d, off, len1);
1649 ✗ break;
1650 ✗ case MP4ODescrTag:
1651 ✗ ret = parse_MP4ODescrTag(d, off, len1);
1652 ✗ break;
1653 ✗ case MP4ESDescrTag:
1654 ✗ ret = parse_MP4ESDescrTag(d, off, len1);
1655 ✗ break;
1656 ✗ case MP4DecConfigDescrTag:
1657 ✗ ret = parse_MP4DecConfigDescrTag(d, off, len1);
1658 ✗ break;
1659 ✗ case MP4SLDescrTag:
1660 ✗ ret = parse_MP4SLDescrTag(d, off, len1);
1661 ✗ break;
1662 }
1663
1664
1665 ✗ done:
1666 ✗ d->level--;
1667 ✗ avio_seek(pb, off + len1, SEEK_SET);
1668 ✗ return ret;
1669 }
1670
1671 ✗ static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1672 Mp4Descr *descr, int *descr_count, int max_descr_count)
1673 {
1674 MP4DescrParseContext d;
1675 int ret;
1676
1677 ✗ d.predefined_SLConfigDescriptor_seen = 0;
1678
1679 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1680 ✗ if (ret < 0)
1681 ✗ return ret;
1682
1683 ✗ ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1684
1685 ✗ *descr_count = d.descr_count;
1686 ✗ return ret;
1687 }
1688
1689 ✗ static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1690 Mp4Descr *descr, int *descr_count, int max_descr_count)
1691 {
1692 MP4DescrParseContext d;
1693 int ret;
1694
1695 ✗ ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1696 ✗ if (ret < 0)
1697 ✗ return ret;
1698
1699 ✗ ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1700
1701 ✗ *descr_count = d.descr_count;
1702 ✗ return ret;
1703 }
1704
1705 ✗ static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1706 int section_len)
1707 {
1708 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1709 ✗ MpegTSSectionFilter *tssf = &filter->u.section_filter;
1710 SectionHeader h;
1711 const uint8_t *p, *p_end;
1712 ✗ int mp4_descr_count = 0;
1713 ✗ Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1714 int i, pid;
1715 ✗ AVFormatContext *s = ts->stream;
1716
1717 ✗ p_end = section + section_len - 4;
1718 ✗ p = section;
1719 ✗ if (parse_section_header(&h, &p, p_end) < 0)
1720 ✗ return;
1721 ✗ if (h.tid != M4OD_TID)
1722 ✗ return;
1723 ✗ if (skip_identical(&h, tssf))
1724 ✗ return;
1725
1726 ✗ mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1727 MAX_MP4_DESCR_COUNT);
1728
1729 ✗ for (pid = 0; pid < NB_PID_MAX; pid++) {
1730 ✗ if (!ts->pids[pid])
1731 ✗ continue;
1732 ✗ for (i = 0; i < mp4_descr_count; i++) {
1733 PESContext *pes;
1734 AVStream *st;
1735 FFStream *sti;
1736 FFIOContext pb;
1737 ✗ if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1738 ✗ continue;
1739 ✗ if (ts->pids[pid]->type != MPEGTS_PES) {
1740 ✗ av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1741 ✗ continue;
1742 }
1743 ✗ pes = ts->pids[pid]->u.pes_filter.opaque;
1744 ✗ st = pes->st;
1745 ✗ if (!st)
1746 ✗ continue;
1747 ✗ sti = ffstream(st);
1748
1749 ✗ pes->sl = mp4_descr[i].sl;
1750
1751 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1752 mp4_descr[i].dec_config_descr_len);
1753 ✗ ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1754 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1755 ✗ st->codecpar->extradata_size > 0)
1756 ✗ sti->need_parsing = 0;
1757 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1758 ✗ st->codecpar->extradata_size > 0)
1759 ✗ sti->need_parsing = 0;
1760
1761 ✗ st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1762 ✗ sti->need_context_update = 1;
1763 }
1764 }
1765 ✗ for (i = 0; i < mp4_descr_count; i++)
1766 ✗ av_free(mp4_descr[i].dec_config_descr);
1767 }
1768
1769 ✗ static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1770 int section_len)
1771 {
1772 ✗ AVProgram *prg = NULL;
1773 ✗ MpegTSContext *ts = filter->u.section_filter.opaque;
1774
1775 ✗ int idx = ff_find_stream_index(ts->stream, filter->pid);
1776 ✗ if (idx < 0)
1777 ✗ return;
1778
1779 /**
1780 * In case we receive an SCTE-35 packet before mpegts context is fully
1781 * initialized.
1782 */
1783 ✗ if (!ts->pkt)
1784 ✗ return;
1785
1786 ✗ new_data_packet(section, section_len, ts->pkt);
1787 ✗ ts->pkt->stream_index = idx;
1788 ✗ prg = av_find_program_from_stream(ts->stream, NULL, idx);
1789 ✗ if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1790 ✗ MpegTSFilter *f = ts->pids[prg->pcr_pid];
1791 ✗ if (f && f->last_pcr != -1)
1792 ✗ ts->pkt->pts = ts->pkt->dts = f->last_pcr/SYSTEM_CLOCK_FREQUENCY_DIVISOR;
1793 }
1794 ✗ ts->stop_parse = 1;
1795
1796 }
1797
1798 static const uint8_t opus_coupled_stream_cnt[9] = {
1799 1, 0, 1, 1, 2, 2, 2, 3, 3
1800 };
1801
1802 static const uint8_t opus_stream_cnt[9] = {
1803 1, 1, 1, 2, 2, 3, 4, 4, 5,
1804 };
1805
1806 static const uint8_t opus_channel_map[8][8] = {
1807 { 0 },
1808 { 0,1 },
1809 { 0,2,1 },
1810 { 0,1,2,3 },
1811 { 0,4,1,2,3 },
1812 { 0,4,1,2,3,5 },
1813 { 0,4,1,2,3,5,6 },
1814 { 0,6,1,2,3,4,5,7 },
1815 };
1816
1817 933 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1818 const uint8_t **pp, const uint8_t *desc_list_end,
1819 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1820 MpegTSContext *ts)
1821 {
1822 933 FFStream *const sti = ffstream(st);
1823 const uint8_t *desc_end;
1824 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1825 char language[252];
1826 int i;
1827
1828 933 desc_tag = get8(pp, desc_list_end);
1829
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 933 if (desc_tag < 0)
1830 559 return AVERROR_INVALIDDATA;
1831 374 desc_len = get8(pp, desc_list_end);
1832
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 374 if (desc_len < 0)
1833 ✗ return AVERROR_INVALIDDATA;
1834 374 desc_end = *pp + desc_len;
1835
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 374 if (desc_end > desc_list_end)
1836 ✗ return AVERROR_INVALIDDATA;
1837
1838 374 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1839
1840
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 374 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1841 stream_type == STREAM_TYPE_PRIVATE_DATA)
1842 12 mpegts_find_stream_type(st, desc_tag, DESC_types);
1843
1844
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 374 switch (desc_tag) {
1845 ✗ case VIDEO_STREAM_DESCRIPTOR:
1846 ✗ if (get8(pp, desc_end) & 0x1) {
1847 ✗ st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1848 }
1849 ✗ break;
1850 ✗ case SL_DESCRIPTOR:
1851 ✗ desc_es_id = get16(pp, desc_end);
1852 ✗ if (desc_es_id < 0)
1853 ✗ break;
1854 ✗ if (ts && ts->pids[pid])
1855 ✗ ts->pids[pid]->es_id = desc_es_id;
1856 ✗ for (i = 0; i < mp4_descr_count; i++)
1857 ✗ if (mp4_descr[i].dec_config_descr_len &&
1858 ✗ mp4_descr[i].es_id == desc_es_id) {
1859 FFIOContext pb;
1860 ✗ ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1861 ✗ mp4_descr[i].dec_config_descr_len);
1862 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1863 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1864 ✗ st->codecpar->extradata_size > 0) {
1865 ✗ sti->need_parsing = 0;
1866 ✗ sti->need_context_update = 1;
1867 }
1868 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1869 ✗ mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1870 }
1871 ✗ break;
1872 ✗ case FMC_DESCRIPTOR:
1873 ✗ if (get16(pp, desc_end) < 0)
1874 ✗ break;
1875 ✗ if (mp4_descr_count > 0 &&
1876 ✗ (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1877 ✗ (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1878 ✗ sti->request_probe > 0) &&
1879 ✗ mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1880 FFIOContext pb;
1881 ✗ ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1882 mp4_descr->dec_config_descr_len);
1883 ✗ ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1884 ✗ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1885 ✗ st->codecpar->extradata_size > 0) {
1886 ✗ sti->request_probe = sti->need_parsing = 0;
1887 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1888 ✗ sti->need_context_update = 1;
1889 }
1890 }
1891 ✗ break;
1892 ✗ case TELETEXT_DESCRIPTOR:
1893 {
1894 ✗ uint8_t *extradata = NULL;
1895 ✗ int language_count = desc_len / 5, ret;
1896
1897 ✗ if (desc_len > 0 && desc_len % 5 != 0)
1898 ✗ return AVERROR_INVALIDDATA;
1899
1900 ✗ if (language_count > 0) {
1901 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1902 ✗ av_assert0(language_count <= sizeof(language) / 4);
1903
1904 ✗ if (st->codecpar->extradata == NULL) {
1905 ✗ ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1906 ✗ if (ret < 0)
1907 ✗ return ret;
1908 }
1909
1910 ✗ if (st->codecpar->extradata_size < language_count * 2)
1911 ✗ return AVERROR_INVALIDDATA;
1912
1913 ✗ extradata = st->codecpar->extradata;
1914
1915 ✗ for (i = 0; i < language_count; i++) {
1916 ✗ language[i * 4 + 0] = get8(pp, desc_end);
1917 ✗ language[i * 4 + 1] = get8(pp, desc_end);
1918 ✗ language[i * 4 + 2] = get8(pp, desc_end);
1919 ✗ language[i * 4 + 3] = ',';
1920
1921 ✗ memcpy(extradata, *pp, 2);
1922 ✗ extradata += 2;
1923
1924 ✗ *pp += 2;
1925 }
1926
1927 ✗ language[i * 4 - 1] = 0;
1928 ✗ av_dict_set(&st->metadata, "language", language, 0);
1929 ✗ sti->need_context_update = 1;
1930 }
1931 }
1932 ✗ break;
1933 9 case SUBTITLING_DESCRIPTOR:
1934 {
1935 /* 8 bytes per DVB subtitle substream data:
1936 * ISO_639_language_code (3 bytes),
1937 * subtitling_type (1 byte),
1938 * composition_page_id (2 bytes),
1939 * ancillary_page_id (2 bytes) */
1940 9 int language_count = desc_len / 8, ret;
1941
1942
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 9 if (desc_len > 0 && desc_len % 8 != 0)
1943 ✗ return AVERROR_INVALIDDATA;
1944
1945
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 9 if (language_count > 1) {
1946 ✗ avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1947 }
1948
1949
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 9 if (language_count > 0) {
1950 uint8_t *extradata;
1951
1952 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1953
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 9 av_assert0(language_count <= sizeof(language) / 4);
1954
1955
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 9 if (st->codecpar->extradata == NULL) {
1956 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1957
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 3 if (ret < 0)
1958 ✗ return ret;
1959 }
1960
1961
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 9 if (st->codecpar->extradata_size < language_count * 5)
1962 ✗ return AVERROR_INVALIDDATA;
1963
1964 9 extradata = st->codecpar->extradata;
1965
1966
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 18 for (i = 0; i < language_count; i++) {
1967 9 language[i * 4 + 0] = get8(pp, desc_end);
1968 9 language[i * 4 + 1] = get8(pp, desc_end);
1969 9 language[i * 4 + 2] = get8(pp, desc_end);
1970 9 language[i * 4 + 3] = ',';
1971
1972 /* hearing impaired subtitles detection using subtitling_type */
1973
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 9 switch (*pp[0]) {
1974 ✗ case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1975 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1976 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1977 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1978 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1979 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1980 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1981 ✗ break;
1982 }
1983
1984 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1985 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1986 9 extradata += 5;
1987
1988 9 *pp += 4;
1989 }
1990
1991 9 language[i * 4 - 1] = 0;
1992 9 av_dict_set(&st->metadata, "language", language, 0);
1993 9 sti->need_context_update = 1;
1994 }
1995 }
1996 9 break;
1997 252 case ISO_639_LANGUAGE_DESCRIPTOR:
1998
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 498 for (i = 0; i + 4 <= desc_len; i += 4) {
1999 246 language[i + 0] = get8(pp, desc_end);
2000 246 language[i + 1] = get8(pp, desc_end);
2001 246 language[i + 2] = get8(pp, desc_end);
2002 246 language[i + 3] = ',';
2003
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 246 switch (get8(pp, desc_end)) {
2004 ✗ case 0x01:
2005 ✗ st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
2006 ✗ break;
2007 ✗ case 0x02:
2008 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2009 ✗ break;
2010 60 case 0x03:
2011 60 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2012 60 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2013 60 break;
2014 }
2015 }
2016
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 252 if (i && language[0]) {
2017 242 language[i - 1] = 0;
2018 /* don't overwrite language, as it may already have been set by
2019 * another, more specific descriptor (e.g. supplementary audio) */
2020 242 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2021 }
2022 252 break;
2023 8 case REGISTRATION_DESCRIPTOR:
2024 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2025 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2026
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 8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2027 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2028
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✓ Branch 1 taken 1 times.
 3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2029 2 sti->request_probe = 50;
2030 }
2031 8 break;
2032 31 case STREAM_IDENTIFIER_DESCRIPTOR:
2033 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2034 31 break;
2035 4 case METADATA_DESCRIPTOR:
2036
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✗ Branch 2 not taken.
 4 if (get16(pp, desc_end) == 0xFFFF)
2037 4 *pp += 4;
2038
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 4 if (get8(pp, desc_end) == 0xFF) {
2039 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2040
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 4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2041 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2042 }
2043 4 break;
2044 4 case EXTENSION_DESCRIPTOR: /* DVB extension descriptor */
2045 4 ext_desc_tag = get8(pp, desc_end);
2046
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 4 if (ext_desc_tag < 0)
2047 ✗ return AVERROR_INVALIDDATA;
2048
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✗ Branch 3 not taken.
 4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2049 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2050
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 3 if (!st->codecpar->extradata) {
2051 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2052 AV_INPUT_BUFFER_PADDING_SIZE);
2053
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 1 if (!st->codecpar->extradata)
2054 ✗ return AVERROR(ENOMEM);
2055
2056 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2057 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2058
2059 1 channel_config_code = get8(pp, desc_end);
2060
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 1 if (channel_config_code < 0)
2061 ✗ return AVERROR_INVALIDDATA;
2062
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 1 if (channel_config_code <= 0x8) {
2063
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 1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2064 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2065
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 1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2066 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2067 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2068 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2069
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 1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2070 } else {
2071 ✗ avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2072 }
2073 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2074 1 sti->need_context_update = 1;
2075 }
2076 }
2077
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 4 if (ext_desc_tag == SUPPLEMENTARY_AUDIO_DESCRIPTOR) {
2078 int flags;
2079
2080 ✗ if (desc_len < 1)
2081 ✗ return AVERROR_INVALIDDATA;
2082 ✗ flags = get8(pp, desc_end);
2083
2084 ✗ if ((flags & 0x80) == 0) /* mix_type */
2085 ✗ st->disposition |= AV_DISPOSITION_DEPENDENT;
2086
2087 ✗ switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2088 ✗ case 0x01:
2089 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2090 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2091 ✗ break;
2092 ✗ case 0x02:
2093 ✗ st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2094 ✗ break;
2095 ✗ case 0x03:
2096 ✗ st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2097 ✗ break;
2098 }
2099
2100 ✗ if (flags & 0x01) { /* language_code_present */
2101 ✗ if (desc_len < 4)
2102 ✗ return AVERROR_INVALIDDATA;
2103 ✗ language[0] = get8(pp, desc_end);
2104 ✗ language[1] = get8(pp, desc_end);
2105 ✗ language[2] = get8(pp, desc_end);
2106 ✗ language[3] = 0;
2107
2108 /* This language always has to override a possible
2109 * ISO 639 language descriptor language */
2110 ✗ if (language[0])
2111 ✗ av_dict_set(&st->metadata, "language", language, 0);
2112 }
2113 }
2114 4 break;
2115 6 case AC3_DESCRIPTOR:
2116 {
2117 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2118
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 6 if (component_type_flag) {
2119 ✗ int component_type = get8(pp, desc_end);
2120 ✗ int service_type_mask = 0x38; // 0b00111000
2121 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2122 ✗ if (service_type == 0x02 /* 0b010 */) {
2123 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2124 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2125 }
2126 }
2127 }
2128 6 break;
2129 ✗ case ENHANCED_AC3_DESCRIPTOR:
2130 {
2131 ✗ int component_type_flag = get8(pp, desc_end) & (1 << 7);
2132 ✗ if (component_type_flag) {
2133 ✗ int component_type = get8(pp, desc_end);
2134 ✗ int service_type_mask = 0x38; // 0b00111000
2135 ✗ int service_type = ((component_type & service_type_mask) >> 3);
2136 ✗ if (service_type == 0x02 /* 0b010 */) {
2137 ✗ st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2138 ✗ av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2139 }
2140 }
2141 }
2142 ✗ break;
2143 ✗ case DATA_COMPONENT_DESCRIPTOR:
2144 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2145 // for captions
2146 ✗ if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2147 // This structure is defined in STD-B10, part 1, listing 5.4 and
2148 // part 2, 6.2.20).
2149 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2150 // Component tag limits are documented in TR-B14, fascicle 2,
2151 // Vol. 3, Section 2, 4.2.8.1
2152 ✗ int actual_component_tag = sti->stream_identifier - 1;
2153 ✗ int picked_profile = AV_PROFILE_UNKNOWN;
2154 ✗ int data_component_id = get16(pp, desc_end);
2155 ✗ if (data_component_id < 0)
2156 ✗ return AVERROR_INVALIDDATA;
2157
2158 ✗ switch (data_component_id) {
2159 ✗ case 0x0008:
2160 // [0x30..0x37] are component tags utilized for
2161 // non-mobile captioning service ("profile A").
2162 ✗ if (actual_component_tag >= 0x30 &&
2163 actual_component_tag <= 0x37) {
2164 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_A;
2165 }
2166 ✗ break;
2167 ✗ case 0x0012:
2168 // component tag 0x87 signifies a mobile/partial reception
2169 // (1seg) captioning service ("profile C").
2170 ✗ if (actual_component_tag == 0x87) {
2171 ✗ picked_profile = AV_PROFILE_ARIB_PROFILE_C;
2172 }
2173 ✗ break;
2174 ✗ default:
2175 ✗ break;
2176 }
2177
2178 ✗ if (picked_profile == AV_PROFILE_UNKNOWN)
2179 ✗ break;
2180
2181 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2182 ✗ st->codecpar->codec_id = AV_CODEC_ID_ARIB_CAPTION;
2183 ✗ if (st->codecpar->profile != picked_profile) {
2184 ✗ st->codecpar->profile = picked_profile;
2185 ✗ sti->need_context_update = 1;
2186 }
2187 ✗ sti->request_probe = 0;
2188 ✗ sti->need_parsing = 0;
2189 }
2190 ✗ break;
2191 ✗ case DOVI_VIDEO_STREAM_DESCRIPTOR:
2192 {
2193 uint32_t buf;
2194 AVDOVIDecoderConfigurationRecord *dovi;
2195 size_t dovi_size;
2196 ✗ int dependency_pid = -1; // Unset
2197
2198 ✗ if (desc_end - *pp < 4) // (8 + 8 + 7 + 6 + 1 + 1 + 1) / 8
2199 ✗ return AVERROR_INVALIDDATA;
2200
2201 ✗ dovi = av_dovi_alloc(&dovi_size);
2202 ✗ if (!dovi)
2203 ✗ return AVERROR(ENOMEM);
2204
2205 ✗ dovi->dv_version_major = get8(pp, desc_end);
2206 ✗ dovi->dv_version_minor = get8(pp, desc_end);
2207 ✗ buf = get16(pp, desc_end);
2208 ✗ dovi->dv_profile = (buf >> 9) & 0x7f; // 7 bits
2209 ✗ dovi->dv_level = (buf >> 3) & 0x3f; // 6 bits
2210 ✗ dovi->rpu_present_flag = (buf >> 2) & 0x01; // 1 bit
2211 ✗ dovi->el_present_flag = (buf >> 1) & 0x01; // 1 bit
2212 ✗ dovi->bl_present_flag = buf & 0x01; // 1 bit
2213 ✗ if (!dovi->bl_present_flag && desc_end - *pp >= 2) {
2214 ✗ buf = get16(pp, desc_end);
2215 ✗ dependency_pid = buf >> 3; // 13 bits
2216 }
2217 ✗ if (desc_end - *pp >= 1) { // 8 bits
2218 ✗ buf = get8(pp, desc_end);
2219 ✗ dovi->dv_bl_signal_compatibility_id = (buf >> 4) & 0x0f; // 4 bits
2220 ✗ dovi->dv_md_compression = (buf >> 2) & 0x03; // 2 bits
2221 } else {
2222 // 0 stands for None
2223 // Dolby Vision V1.2.93 profiles and levels
2224 ✗ dovi->dv_bl_signal_compatibility_id = 0;
2225 ✗ dovi->dv_md_compression = AV_DOVI_COMPRESSION_NONE;
2226 }
2227
2228 ✗ if (!av_packet_side_data_add(&st->codecpar->coded_side_data,
2229 ✗ &st->codecpar->nb_coded_side_data,
2230 AV_PKT_DATA_DOVI_CONF,
2231 (uint8_t *)dovi, dovi_size, 0)) {
2232 ✗ av_free(dovi);
2233 ✗ return AVERROR(ENOMEM);
2234 }
2235
2236 ✗ av_log(fc, AV_LOG_TRACE, "DOVI, version: %d.%d, profile: %d, level: %d, "
2237 "rpu flag: %d, el flag: %d, bl flag: %d, dependency_pid: %d, "
2238 "compatibility id: %d, compression: %d\n",
2239 ✗ dovi->dv_version_major, dovi->dv_version_minor,
2240 ✗ dovi->dv_profile, dovi->dv_level,
2241 ✗ dovi->rpu_present_flag,
2242 ✗ dovi->el_present_flag,
2243 ✗ dovi->bl_present_flag,
2244 dependency_pid,
2245 ✗ dovi->dv_bl_signal_compatibility_id,
2246 ✗ dovi->dv_md_compression);
2247 }
2248 ✗ break;
2249 60 default:
2250 60 break;
2251 }
2252 374 *pp = desc_end;
2253 374 return 0;
2254 }
2255
2256 12 static AVStream *find_matching_stream(MpegTSContext *ts, int pid, unsigned int programid,
2257 int stream_identifier, int pmt_stream_idx, struct Program *p)
2258 {
2259 12 AVFormatContext *s = ts->stream;
2260 12 AVStream *found = NULL;
2261
2262
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✓ Branch 1 taken 12 times.
 12 if (stream_identifier) { /* match based on "stream identifier descriptor" if present */
2263 ✗ for (int i = 0; i < p->nb_streams; i++) {
2264 ✗ if (p->streams[i].stream_identifier == stream_identifier)
2265 ✗ if (!found || pmt_stream_idx == i) /* fallback to idx based guess if multiple streams have the same identifier */
2266 ✗ found = s->streams[p->streams[i].idx];
2267 }
2268
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 12 } else if (pmt_stream_idx < p->nb_streams) { /* match based on position within the PMT */
2269 7 found = s->streams[p->streams[pmt_stream_idx].idx];
2270 }
2271
2272
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 12 if (found) {
2273 7 av_log(ts->stream, AV_LOG_VERBOSE,
2274 "re-using existing %s stream %d (pid=0x%x) for new pid=0x%x\n",
2275 7 av_get_media_type_string(found->codecpar->codec_type),
2276 found->index, found->id, pid);
2277 }
2278
2279 12 return found;
2280 }
2281
2282 559 static int parse_stream_identifier_desc(const uint8_t *p, const uint8_t *p_end)
2283 {
2284 559 const uint8_t **pp = &p;
2285 const uint8_t *desc_list_end;
2286 const uint8_t *desc_end;
2287 int desc_list_len;
2288 int desc_len, desc_tag;
2289
2290 559 desc_list_len = get16(pp, p_end);
2291
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 559 if (desc_list_len < 0)
2292 ✗ return -1;
2293 559 desc_list_len &= 0xfff;
2294 559 desc_list_end = p + desc_list_len;
2295
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✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2296 ✗ return -1;
2297
2298 while (1) {
2299 893 desc_tag = get8(pp, desc_list_end);
2300
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✓ Branch 1 taken 362 times.
 893 if (desc_tag < 0)
2301 531 return -1;
2302 362 desc_len = get8(pp, desc_list_end);
2303
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 362 if (desc_len < 0)
2304 ✗ return -1;
2305 362 desc_end = *pp + desc_len;
2306
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 362 if (desc_end > desc_list_end)
2307 ✗ return -1;
2308
2309
2/2
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✓ Branch 1 taken 334 times.
 362 if (desc_tag == STREAM_IDENTIFIER_DESCRIPTOR) {
2310 28 return get8(pp, desc_end);
2311 }
2312 334 *pp = desc_end;
2313 }
2314
2315 return -1;
2316 }
2317
2318 139 static int is_pes_stream(int stream_type, uint32_t prog_reg_desc)
2319 {
2320
2/3
✗ Branch 0 not taken.
✓ Branch 1 taken 30 times.
✓ Branch 2 taken 109 times.
 139 switch (stream_type) {
2321 ✗ case STREAM_TYPE_PRIVATE_SECTION:
2322 case STREAM_TYPE_ISO_IEC_14496_SECTION:
2323 ✗ return 0;
2324 30 case STREAM_TYPE_SCTE_DATA_SCTE_35:
2325 /* This User Private stream_type value is used by multiple organizations
2326 for different things. ANSI/SCTE 35 splice_info_section() is a
2327 private_section() not a PES_packet(). */
2328 30 return !(prog_reg_desc == AV_RL32("CUEI"));
2329 109 default:
2330 109 return 1;
2331 }
2332 }
2333
2334 2988 static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2335 {
2336 2988 MpegTSContext *ts = filter->u.section_filter.opaque;
2337 2988 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2338 struct Program old_program;
2339 2988 SectionHeader h1, *h = &h1;
2340 PESContext *pes;
2341 AVStream *st;
2342 const uint8_t *p, *p_end, *desc_list_end;
2343 int program_info_length, pcr_pid, pid, stream_type;
2344 int desc_list_len;
2345 2988 uint32_t prog_reg_desc = 0; /* registration descriptor */
2346 2988 int stream_identifier = -1;
2347 struct Program *prg;
2348
2349 2988 int mp4_descr_count = 0;
2350 2988 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
2351 int i;
2352
2353 2988 av_log(ts->stream, AV_LOG_TRACE, "PMT: len %i\n", section_len);
2354 hex_dump_debug(ts->stream, section, section_len);
2355
2356 2988 p_end = section + section_len - 4;
2357 2988 p = section;
2358
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 2988 times.
 2988 if (parse_section_header(h, &p, p_end) < 0)
2359 2717 return;
2360
2/2
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✓ Branch 1 taken 2913 times.
 2988 if (h->tid != PMT_TID)
2361 75 return;
2362
1/2
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✓ Branch 1 taken 2913 times.
 2913 if (!h->current_next)
2363 ✗ return;
2364
2/2
✓ Branch 1 taken 2642 times.
✓ Branch 2 taken 271 times.
 2913 if (skip_identical(h, tssf))
2365 2642 return;
2366
2367 271 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x sec_num=%d/%d version=%d tid=%d\n",
2368 271 h->id, h->sec_num, h->last_sec_num, h->version, h->tid);
2369
2370
1/4
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✓ Branch 1 taken 271 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (!ts->scan_all_pmts && ts->skip_changes)
2371 ✗ return;
2372
2373 271 prg = get_program(ts, h->id);
2374
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (prg)
2375 271 old_program = *prg;
2376 else
2377 ✗ clear_program(&old_program);
2378
2379
1/4
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✓ Branch 1 taken 271 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
 271 if (ts->skip_unknown_pmt && !prg)
2380 ✗ return;
2381
3/6
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✗ Branch 1 not taken.
✓ Branch 2 taken 271 times.
✗ Branch 3 not taken.
✗ Branch 4 not taken.
✓ Branch 5 taken 271 times.
 271 if (prg && prg->nb_pids && prg->pids[0] != ts->current_pid)
2382 ✗ return;
2383
2/2
✓ Branch 0 taken 172 times.
✓ Branch 1 taken 99 times.
 271 if (!ts->skip_clear)
2384 172 clear_avprogram(ts, h->id);
2385 271 clear_program(prg);
2386 271 add_pid_to_program(prg, ts->current_pid);
2387
2388 271 pcr_pid = get16(&p, p_end);
2389
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (pcr_pid < 0)
2390 ✗ return;
2391 271 pcr_pid &= 0x1fff;
2392 271 add_pid_to_program(prg, pcr_pid);
2393 271 update_av_program_info(ts->stream, h->id, pcr_pid, h->version);
2394
2395 271 av_log(ts->stream, AV_LOG_TRACE, "pcr_pid=0x%x\n", pcr_pid);
2396
2397 271 program_info_length = get16(&p, p_end);
2398
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (program_info_length < 0)
2399 ✗ return;
2400 271 program_info_length &= 0xfff;
2401
2/2
✓ Branch 0 taken 246 times.
✓ Branch 1 taken 271 times.
 517 while (program_info_length >= 2) {
2402 uint8_t tag, len;
2403 246 tag = get8(&p, p_end);
2404 246 len = get8(&p, p_end);
2405
2406 246 av_log(ts->stream, AV_LOG_TRACE, "program tag: 0x%02x len=%d\n", tag, len);
2407
2408 246 program_info_length -= 2;
2409
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (len > program_info_length)
2410 // something else is broken, exit the program_descriptors_loop
2411 ✗ break;
2412 246 program_info_length -= len;
2413
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 246 times.
 246 if (tag == IOD_DESCRIPTOR) {
2414 ✗ get8(&p, p_end); // scope
2415 ✗ get8(&p, p_end); // label
2416 ✗ len -= 2;
2417 ✗ mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count,
2418 &mp4_descr_count, MAX_MP4_DESCR_COUNT);
2419
3/4
✓ Branch 0 taken 120 times.
✓ Branch 1 taken 126 times.
✓ Branch 2 taken 120 times.
✗ Branch 3 not taken.
 246 } else if (tag == REGISTRATION_DESCRIPTOR && len >= 4) {
2420 120 prog_reg_desc = bytestream_get_le32(&p);
2421 120 len -= 4;
2422 }
2423 246 p += len;
2424 }
2425 271 p += program_info_length;
2426
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 if (p >= p_end)
2427 ✗ goto out;
2428
2429 // stop parsing after pmt, we found header
2430
2/2
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✓ Branch 1 taken 216 times.
 271 if (!ts->pkt)
2431 55 ts->stop_parse = 2;
2432
2433
1/2
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✗ Branch 1 not taken.
 271 if (prg)
2434 271 prg->pmt_found = 1;
2435
2436
1/2
✓ Branch 0 taken 830 times.
✗ Branch 1 not taken.
 830 for (i = 0; i < MAX_STREAMS_PER_PROGRAM; i++) {
2437 830 st = 0;
2438 830 pes = NULL;
2439 830 stream_type = get8(&p, p_end);
2440
2/2
✓ Branch 0 taken 271 times.
✓ Branch 1 taken 559 times.
 830 if (stream_type < 0)
2441 271 break;
2442 559 pid = get16(&p, p_end);
2443
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid < 0)
2444 ✗ goto out;
2445 559 pid &= 0x1fff;
2446
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (pid == ts->current_pid)
2447 ✗ goto out;
2448
2449 559 stream_identifier = parse_stream_identifier_desc(p, p_end) + 1;
2450
2451 /* now create stream */
2452
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) {
2453 420 pes = ts->pids[pid]->u.pes_filter.opaque;
2454
3/4
✓ Branch 0 taken 16 times.
✓ Branch 1 taken 404 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 16 times.
 420 if (ts->merge_pmt_versions && !pes->st) {
2455 ✗ st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2456 ✗ if (st) {
2457 ✗ pes->st = st;
2458 ✗ pes->stream_type = stream_type;
2459 ✗ pes->merged_st = 1;
2460 }
2461 }
2462
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 420 times.
 420 if (!pes->st) {
2463 ✗ pes->st = avformat_new_stream(pes->stream, NULL);
2464 ✗ if (!pes->st)
2465 ✗ goto out;
2466 ✗ pes->st->id = pes->pid;
2467 }
2468 420 st = pes->st;
2469
2/2
✓ Branch 1 taken 109 times.
✓ Branch 2 taken 30 times.
 139 } else if (is_pes_stream(stream_type, prog_reg_desc)) {
2470
1/2
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✓ Branch 1 taken 109 times.
 109 if (ts->pids[pid])
2471 ✗ mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably
2472 109 pes = add_pes_stream(ts, pid, pcr_pid);
2473
4/6
✓ Branch 0 taken 8 times.
✓ Branch 1 taken 101 times.
✓ Branch 2 taken 8 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 8 times.
✗ Branch 5 not taken.
 109 if (ts->merge_pmt_versions && pes && !pes->st) {
2474 8 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2475
2/2
✓ Branch 0 taken 4 times.
✓ Branch 1 taken 4 times.
 8 if (st) {
2476 4 pes->st = st;
2477 4 pes->stream_type = stream_type;
2478 4 pes->merged_st = 1;
2479 }
2480 }
2481
3/4
✓ Branch 0 taken 109 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 105 times.
✓ Branch 3 taken 4 times.
 109 if (pes && !pes->st) {
2482 105 st = avformat_new_stream(pes->stream, NULL);
2483
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 105 times.
 105 if (!st)
2484 ✗ goto out;
2485 105 st->id = pes->pid;
2486 }
2487 } else {
2488 30 int idx = ff_find_stream_index(ts->stream, pid);
2489
2/2
✓ Branch 0 taken 20 times.
✓ Branch 1 taken 10 times.
 30 if (idx >= 0) {
2490 20 st = ts->stream->streams[idx];
2491 }
2492
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) {
2493 4 st = find_matching_stream(ts, pid, h->id, stream_identifier, i, &old_program);
2494 }
2495
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 23 times.
 30 if (!st) {
2496 7 st = avformat_new_stream(ts->stream, NULL);
2497
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 7 times.
 7 if (!st)
2498 ✗ goto out;
2499 7 st->id = pid;
2500 7 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2501
2/4
✓ Branch 0 taken 7 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 7 times.
✗ Branch 3 not taken.
 7 if (stream_type == STREAM_TYPE_SCTE_DATA_SCTE_35 && prog_reg_desc == AV_RL32("CUEI")) {
2502 7 mpegts_find_stream_type(st, stream_type, SCTE_types);
2503 7 mpegts_open_section_filter(ts, pid, scte_data_cb, ts, 1);
2504 }
2505 }
2506 }
2507
2508
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (!st)
2509 ✗ goto out;
2510
2511
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)
2512 105 mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc);
2513
2514 559 add_pid_to_program(prg, pid);
2515
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (prg) {
2516 559 prg->streams[i].idx = st->index;
2517 559 prg->streams[i].stream_identifier = stream_identifier;
2518 559 prg->nb_streams++;
2519 }
2520
2521 559 av_program_add_stream_index(ts->stream, h->id, st->index);
2522
2523 559 desc_list_len = get16(&p, p_end);
2524
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 559 times.
 559 if (desc_list_len < 0)
2525 ✗ goto out;
2526 559 desc_list_len &= 0xfff;
2527 559 desc_list_end = p + desc_list_len;
2528
1/2
✓ Branch 0 taken 559 times.
✗ Branch 1 not taken.
 559 if (desc_list_end > p_end)
2529 ✗ goto out;
2530 for (;;) {
2531
2/2
✓ Branch 1 taken 559 times.
✓ Branch 2 taken 370 times.
 929 if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p,
2532 desc_list_end, mp4_descr,
2533 mp4_descr_count, pid, ts) < 0)
2534 559 break;
2535
2536
2/6
✓ Branch 0 taken 370 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 370 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 370 if (pes && prog_reg_desc == AV_RL32("HDMV") &&
2537 ✗ stream_type == STREAM_TYPE_BLURAY_AUDIO_TRUEHD && pes->sub_st) {
2538 ✗ av_program_add_stream_index(ts->stream, h->id,
2539 ✗ pes->sub_st->index);
2540 ✗ pes->sub_st->codecpar->codec_tag = st->codecpar->codec_tag;
2541 }
2542 }
2543 559 p = desc_list_end;
2544 }
2545
2546
1/2
✓ Branch 0 taken 271 times.
✗ Branch 1 not taken.
 271 if (!ts->pids[pcr_pid])
2547 ✗ mpegts_open_pcr_filter(ts, pcr_pid);
2548
2549 271 out:
2550
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 271 times.
 271 for (i = 0; i < mp4_descr_count; i++)
2551 ✗ av_free(mp4_descr[i].dec_config_descr);
2552 }
2553
2554 3015 static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2555 {
2556 3015 MpegTSContext *ts = filter->u.section_filter.opaque;
2557 3015 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2558 3015 SectionHeader h1, *h = &h1;
2559 const uint8_t *p, *p_end;
2560 int sid, pmt_pid;
2561 3015 int nb_prg = 0;
2562 AVProgram *program;
2563
2564 3015 av_log(ts->stream, AV_LOG_TRACE, "PAT:\n");
2565 hex_dump_debug(ts->stream, section, section_len);
2566
2567 3015 p_end = section + section_len - 4;
2568 3015 p = section;
2569
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3015 times.
 3015 if (parse_section_header(h, &p, p_end) < 0)
2570 2802 return;
2571
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3015 times.
 3015 if (h->tid != PAT_TID)
2572 ✗ return;
2573
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3015 times.
 3015 if (!h->current_next)
2574 ✗ return;
2575
2/2
✓ Branch 0 taken 536 times.
✓ Branch 1 taken 2479 times.
 3015 if (ts->skip_changes)
2576 536 return;
2577
2578
2/2
✓ Branch 1 taken 2266 times.
✓ Branch 2 taken 213 times.
 2479 if (skip_identical(h, tssf))
2579 2266 return;
2580 213 ts->id = h->id;
2581
2582 for (;;) {
2583 426 sid = get16(&p, p_end);
2584
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 if (sid < 0)
2585 213 break;
2586 213 pmt_pid = get16(&p, p_end);
2587
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid < 0)
2588 ✗ break;
2589 213 pmt_pid &= 0x1fff;
2590
2591
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (pmt_pid == ts->current_pid)
2592 ✗ break;
2593
2594 213 av_log(ts->stream, AV_LOG_TRACE, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
2595
2596
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid == 0x0000) {
2597 /* NIT info */
2598 } else {
2599 213 MpegTSFilter *fil = ts->pids[pmt_pid];
2600 struct Program *prg;
2601 213 program = av_new_program(ts->stream, sid);
2602
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (program) {
2603 213 program->program_num = sid;
2604 213 program->pmt_pid = pmt_pid;
2605 }
2606
2/2
✓ Branch 0 taken 158 times.
✓ Branch 1 taken 55 times.
 213 if (fil)
2607
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 if ( fil->type != MPEGTS_SECTION
2608
1/2
✓ Branch 0 taken 158 times.
✗ Branch 1 not taken.
 158 || fil->pid != pmt_pid
2609
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 158 times.
 158 || fil->u.section_filter.section_cb != pmt_cb)
2610 ✗ mpegts_close_filter(ts, ts->pids[pmt_pid]);
2611
2612
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 158 times.
 213 if (!ts->pids[pmt_pid])
2613 55 mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
2614 213 prg = add_program(ts, sid);
2615
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg) {
2616 213 unsigned prg_idx = prg - ts->prg;
2617
3/4
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✓ Branch 1 taken 55 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 158 times.
 213 if (prg->nb_pids && prg->pids[0] != pmt_pid)
2618 ✗ clear_program(prg);
2619 213 add_pid_to_program(prg, pmt_pid);
2620
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 213 times.
 213 if (prg_idx > nb_prg)
2621 ✗ FFSWAP(struct Program, ts->prg[nb_prg], ts->prg[prg_idx]);
2622
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (prg_idx >= nb_prg)
2623 213 nb_prg++;
2624 } else
2625 ✗ nb_prg = 0;
2626 }
2627 }
2628 213 ts->nb_prg = nb_prg;
2629
2630
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (sid < 0) {
2631 int i,j;
2632
2/2
✓ Branch 0 taken 213 times.
✓ Branch 1 taken 213 times.
 426 for (j=0; j<ts->stream->nb_programs; j++) {
2633
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 for (i = 0; i < ts->nb_prg; i++)
2634
1/2
✓ Branch 0 taken 213 times.
✗ Branch 1 not taken.
 213 if (ts->prg[i].id == ts->stream->programs[j]->id)
2635 213 break;
2636
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)
2637 ✗ clear_avprogram(ts, ts->stream->programs[j]->id);
2638 }
2639 }
2640 }
2641
2642 14 static void eit_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2643 {
2644 14 MpegTSContext *ts = filter->u.section_filter.opaque;
2645 const uint8_t *p, *p_end;
2646 14 SectionHeader h1, *h = &h1;
2647
2648 /*
2649 * Sometimes we receive EPG packets but SDT table do not have
2650 * eit_pres_following or eit_sched turned on, so we open EPG
2651 * stream directly here.
2652 */
2653
2/2
✓ Branch 0 taken 3 times.
✓ Branch 1 taken 11 times.
 14 if (!ts->epg_stream) {
2654 3 ts->epg_stream = avformat_new_stream(ts->stream, NULL);
2655
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3 times.
 3 if (!ts->epg_stream)
2656 2 return;
2657 3 ts->epg_stream->id = EIT_PID;
2658 3 ts->epg_stream->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2659 3 ts->epg_stream->codecpar->codec_id = AV_CODEC_ID_EPG;
2660 }
2661
2662
2/2
✓ Branch 0 taken 2 times.
✓ Branch 1 taken 12 times.
 14 if (ts->epg_stream->discard == AVDISCARD_ALL)
2663 2 return;
2664
2665 12 p_end = section + section_len - 4;
2666 12 p = section;
2667
2668
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 12 times.
 12 if (parse_section_header(h, &p, p_end) < 0)
2669 ✗ return;
2670
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)
2671 ✗ return;
2672
2673 12 av_log(ts->stream, AV_LOG_TRACE, "EIT: tid received = %.02x\n", h->tid);
2674
2675 /**
2676 * Service_id 0xFFFF is reserved, it indicates that the current EIT table
2677 * is scrambled.
2678 */
2679
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (h->id == 0xFFFF) {
2680 ✗ av_log(ts->stream, AV_LOG_TRACE, "Scrambled EIT table received.\n");
2681 ✗ return;
2682 }
2683
2684 /**
2685 * In case we receive an EPG packet before mpegts context is fully
2686 * initialized.
2687 */
2688
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 12 times.
 12 if (!ts->pkt)
2689 ✗ return;
2690
2691 12 new_data_packet(section, section_len, ts->pkt);
2692 12 ts->pkt->stream_index = ts->epg_stream->index;
2693 12 ts->stop_parse = 1;
2694 }
2695
2696 442 static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
2697 {
2698 442 MpegTSContext *ts = filter->u.section_filter.opaque;
2699 442 MpegTSSectionFilter *tssf = &filter->u.section_filter;
2700 442 SectionHeader h1, *h = &h1;
2701 const uint8_t *p, *p_end, *desc_list_end, *desc_end;
2702 int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
2703 char *name, *provider_name;
2704
2705 442 av_log(ts->stream, AV_LOG_TRACE, "SDT:\n");
2706 hex_dump_debug(ts->stream, section, section_len);
2707
2708 442 p_end = section + section_len - 4;
2709 442 p = section;
2710
1/2
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✓ Branch 2 taken 442 times.
 442 if (parse_section_header(h, &p, p_end) < 0)
2711 342 return;
2712
1/2
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✓ Branch 1 taken 442 times.
 442 if (h->tid != SDT_TID)
2713 ✗ return;
2714
1/2
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✓ Branch 1 taken 442 times.
 442 if (!h->current_next)
2715 ✗ return;
2716
2/2
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✓ Branch 1 taken 387 times.
 442 if (ts->skip_changes)
2717 55 return;
2718
2/2
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✓ Branch 2 taken 100 times.
 387 if (skip_identical(h, tssf))
2719 287 return;
2720
2721 100 onid = get16(&p, p_end);
2722
1/2
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✓ Branch 1 taken 100 times.
 100 if (onid < 0)
2723 ✗ return;
2724 100 val = get8(&p, p_end);
2725
1/2
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✗ Branch 1 not taken.
 100 if (val < 0)
2726 ✗ return;
2727 for (;;) {
2728 200 sid = get16(&p, p_end);
2729
2/2
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✓ Branch 1 taken 100 times.
 200 if (sid < 0)
2730 100 break;
2731 100 val = get8(&p, p_end);
2732
1/2
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✓ Branch 1 taken 100 times.
 100 if (val < 0)
2733 ✗ break;
2734 100 desc_list_len = get16(&p, p_end);
2735
1/2
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✓ Branch 1 taken 100 times.
 100 if (desc_list_len < 0)
2736 ✗ break;
2737 100 desc_list_len &= 0xfff;
2738 100 desc_list_end = p + desc_list_len;
2739
1/2
✓ Branch 0 taken 100 times.
✗ Branch 1 not taken.
 100 if (desc_list_end > p_end)
2740 ✗ break;
2741 for (;;) {
2742 200 desc_tag = get8(&p, desc_list_end);
2743
2/2
✓ Branch 0 taken 100 times.
✓ Branch 1 taken 100 times.
 200 if (desc_tag < 0)
2744 100 break;
2745 100 desc_len = get8(&p, desc_list_end);
2746 100 desc_end = p + desc_len;
2747
2/4
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✗ Branch 1 not taken.
✓ Branch 2 taken 100 times.
✗ Branch 3 not taken.
 100 if (desc_len < 0 || desc_end > desc_list_end)
2748 break;
2749
2750 100 av_log(ts->stream, AV_LOG_TRACE, "tag: 0x%02x len=%d\n",
2751 desc_tag, desc_len);
2752
2753
1/2
✓ Branch 0 taken 100 times.
✗ Branch 1 not taken.
 100 switch (desc_tag) {
2754 100 case SERVICE_DESCRIPTOR:
2755 100 service_type = get8(&p, desc_end);
2756
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 100 times.
 100 if (service_type < 0)
2757 ✗ break;
2758 100 provider_name = getstr8(&p, desc_end);
2759
1/2
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✓ Branch 1 taken 100 times.
 100 if (!provider_name)
2760 ✗ break;
2761 100 name = getstr8(&p, desc_end);
2762
1/2
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✗ Branch 1 not taken.
 100 if (name) {
2763 100 AVProgram *program = av_new_program(ts->stream, sid);
2764
1/2
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✗ Branch 1 not taken.
 100 if (program) {
2765 100 av_dict_set(&program->metadata, "service_name", name, 0);
2766 100 av_dict_set(&program->metadata, "service_provider",
2767 provider_name, 0);
2768 }
2769 }
2770 100 av_free(name);
2771 100 av_free(provider_name);
2772 100 break;
2773 ✗ default:
2774 ✗ break;
2775 }
2776 100 p = desc_end;
2777 }
2778 100 p = desc_list_end;
2779 }
2780 }
2781
2782 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
2783 const uint8_t *packet);
2784
2785 /* handle one TS packet */
2786 398524 static int handle_packet(MpegTSContext *ts, const uint8_t *packet, int64_t pos)
2787 {
2788 MpegTSFilter *tss;
2789 int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity,
2790 has_adaptation, has_payload;
2791 const uint8_t *p, *p_end;
2792
2793 398524 pid = AV_RB16(packet + 1) & 0x1fff;
2794 398524 is_start = packet[1] & 0x40;
2795 398524 tss = ts->pids[pid];
2796
6/6
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✓ Branch 1 taken 8011 times.
✓ Branch 2 taken 6799 times.
✓ Branch 3 taken 383714 times.
✓ Branch 4 taken 17 times.
✓ Branch 5 taken 6782 times.
 398524 if (ts->auto_guess && !tss && is_start) {
2797 17 add_pes_stream(ts, pid, -1);
2798 17 tss = ts->pids[pid];
2799 }
2800
2/2
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✓ Branch 1 taken 383872 times.
 398524 if (!tss)
2801 14652 return 0;
2802
2/2
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✓ Branch 1 taken 347732 times.
 383872 if (is_start)
2803 36140 tss->discard = discard_pid(ts, pid);
2804
1/2
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✓ Branch 1 taken 383872 times.
 383872 if (tss->discard)
2805 ✗ return 0;
2806 383872 ts->current_pid = pid;
2807
2808 383872 afc = (packet[3] >> 4) & 3;
2809
1/2
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✓ Branch 1 taken 383872 times.
 383872 if (afc == 0) /* reserved value */
2810 ✗ return 0;
2811 383872 has_adaptation = afc & 2;
2812 383872 has_payload = afc & 1;
2813 443414 is_discontinuity = has_adaptation &&
2814
4/4
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✓ Branch 1 taken 324330 times.
✓ Branch 2 taken 59504 times.
✓ Branch 3 taken 38 times.
 443376 packet[4] != 0 && /* with length > 0 */
2815
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 59504 times.
 59504 (packet[5] & 0x80); /* and discontinuity indicated */
2816
2817 /* continuity check (currently not used) */
2818 383872 cc = (packet[3] & 0xf);
2819
2/2
✓ Branch 0 taken 381027 times.
✓ Branch 1 taken 2845 times.
 383872 expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc;
2820
1/2
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✗ Branch 1 not taken.
 383872 cc_ok = pid == NULL_PID ||
2821 383872 is_discontinuity ||
2822
5/6
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✗ Branch 1 not taken.
✓ Branch 2 taken 382724 times.
✓ Branch 3 taken 1148 times.
✓ Branch 4 taken 382066 times.
✓ Branch 5 taken 658 times.
 767744 tss->last_cc < 0 ||
2823 expected_cc == cc;
2824
2825 383872 tss->last_cc = cc;
2826
2/2
✓ Branch 0 taken 658 times.
✓ Branch 1 taken 383214 times.
 383872 if (!cc_ok) {
2827 658 av_log(ts->stream, AV_LOG_DEBUG,
2828 "Continuity check failed for pid %d expected %d got %d\n",
2829 pid, expected_cc, cc);
2830
2/2
✓ Branch 0 taken 7 times.
✓ Branch 1 taken 651 times.
 658 if (tss->type == MPEGTS_PES) {
2831 7 PESContext *pc = tss->u.pes_filter.opaque;
2832 7 pc->flags |= AV_PKT_FLAG_CORRUPT;
2833 }
2834 }
2835
2836
2/2
✓ Branch 0 taken 12 times.
✓ Branch 1 taken 383860 times.
 383872 if (packet[1] & 0x80) {
2837 12 av_log(ts->stream, AV_LOG_DEBUG, "Packet had TEI flag set; marking as corrupt\n");
2838
1/2
✓ Branch 0 taken 12 times.
✗ Branch 1 not taken.
 12 if (tss->type == MPEGTS_PES) {
2839 12 PESContext *pc = tss->u.pes_filter.opaque;
2840 12 pc->flags |= AV_PKT_FLAG_CORRUPT;
2841 }
2842 }
2843
2844 383872 p = packet + 4;
2845
2/2
✓ Branch 0 taken 59542 times.
✓ Branch 1 taken 324330 times.
 383872 if (has_adaptation) {
2846 int64_t pcr_h;
2847 int pcr_l;
2848
2/2
✓ Branch 1 taken 27578 times.
✓ Branch 2 taken 31964 times.
 59542 if (parse_pcr(&pcr_h, &pcr_l, packet) == 0)
2849 27578 tss->last_pcr = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
2850 /* skip adaptation field */
2851 59542 p += p[0] + 1;
2852 }
2853 /* if past the end of packet, ignore */
2854 383872 p_end = packet + TS_PACKET_SIZE;
2855
3/4
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✓ Branch 1 taken 2857 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 381015 times.
 383872 if (p >= p_end || !has_payload)
2856 2857 return 0;
2857
2858
1/2
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✗ Branch 1 not taken.
 381015 if (pos >= 0) {
2859
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 381015 times.
 381015 av_assert0(pos >= TS_PACKET_SIZE);
2860 381015 ts->pos47_full = pos - TS_PACKET_SIZE;
2861 }
2862
2863
2/2
✓ Branch 0 taken 6494 times.
✓ Branch 1 taken 374521 times.
 381015 if (tss->type == MPEGTS_SECTION) {
2864
2/2
✓ Branch 0 taken 6459 times.
✓ Branch 1 taken 35 times.
 6494 if (is_start) {
2865 /* pointer field present */
2866 6459 len = *p++;
2867
1/2
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✓ Branch 1 taken 6459 times.
 6459 if (len > p_end - p)
2868 ✗ return 0;
2869
1/4
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✗ Branch 2 not taken.
✗ Branch 3 not taken.
 6459 if (len && cc_ok) {
2870 /* write remaining section bytes */
2871 ✗ write_section_data(ts, tss,
2872 p, len, 0);
2873 /* check whether filter has been closed */
2874 ✗ if (!ts->pids[pid])
2875 ✗ return 0;
2876 }
2877 6459 p += len;
2878
1/2
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✗ Branch 1 not taken.
 6459 if (p < p_end) {
2879 6459 write_section_data(ts, tss,
2880 6459 p, p_end - p, 1);
2881 }
2882 } else {
2883
1/2
✓ Branch 0 taken 35 times.
✗ Branch 1 not taken.
 35 if (cc_ok) {
2884 35 write_section_data(ts, tss,
2885 35 p, p_end - p, 0);
2886 }
2887 }
2888
2889 // stop find_stream_info from waiting for more streams
2890 // when all programs have received a PMT
2891
4/4
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✓ Branch 1 taken 2043 times.
✓ Branch 2 taken 17 times.
✓ Branch 3 taken 4434 times.
 6494 if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) {
2892 int i;
2893
2/2
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✓ Branch 1 taken 17 times.
 34 for (i = 0; i < ts->nb_prg; i++) {
2894
1/2
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✓ Branch 1 taken 17 times.
 17 if (!ts->prg[i].pmt_found)
2895 ✗ break;
2896 }
2897
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) {
2898 17 av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n");
2899 17 ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER;
2900 }
2901 }
2902
2903 } else {
2904 int ret;
2905 // Note: The position here points actually behind the current packet.
2906
1/2
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✗ Branch 1 not taken.
 374521 if (tss->type == MPEGTS_PES) {
2907
1/2
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✓ Branch 1 taken 374521 times.
 374521 if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start,
2908 374521 pos - ts->raw_packet_size)) < 0)
2909 ✗ return ret;
2910 }
2911 }
2912
2913 381015 return 0;
2914 }
2915
2916 59 static int mpegts_resync(AVFormatContext *s, int seekback, const uint8_t *current_packet)
2917 {
2918 59 MpegTSContext *ts = s->priv_data;
2919 59 AVIOContext *pb = s->pb;
2920 int c, i;
2921 59 uint64_t pos = avio_tell(pb);
2922 59 int64_t back = FFMIN(seekback, pos);
2923
2924 //Special case for files like 01c56b0dc1.ts
2925
3/6
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✓ Branch 1 taken 53 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 6 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
 59 if (current_packet[0] == 0x80 && current_packet[12] == SYNC_BYTE && pos >= TS_PACKET_SIZE) {
2926 ✗ avio_seek(pb, 12 - TS_PACKET_SIZE, SEEK_CUR);
2927 ✗ return 0;
2928 }
2929
2930 59 avio_seek(pb, -back, SEEK_CUR);
2931
2932
1/2
✓ Branch 0 taken 4257 times.
✗ Branch 1 not taken.
 4257 for (i = 0; i < ts->resync_size; i++) {
2933 4257 c = avio_r8(pb);
2934
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 4257 times.
 4257 if (avio_feof(pb))
2935 ✗ return AVERROR_EOF;
2936
2/2
✓ Branch 0 taken 59 times.
✓ Branch 1 taken 4198 times.
 4257 if (c == SYNC_BYTE) {
2937 int new_packet_size, ret;
2938 59 avio_seek(pb, -1, SEEK_CUR);
2939 59 pos = avio_tell(pb);
2940 59 ret = ffio_ensure_seekback(pb, PROBE_PACKET_MAX_BUF);
2941
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 59 times.
 59 if (ret < 0)
2942 ✗ return ret;
2943 59 new_packet_size = get_packet_size(s);
2944
2/4
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✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 59 times.
 59 if (new_packet_size > 0 && new_packet_size != ts->raw_packet_size) {
2945 ✗ av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", new_packet_size);
2946 ✗ ts->raw_packet_size = new_packet_size;
2947 }
2948 59 avio_seek(pb, pos, SEEK_SET);
2949 59 return 0;
2950 }
2951 }
2952 ✗ av_log(s, AV_LOG_ERROR,
2953 "max resync size reached, could not find sync byte\n");
2954 /* no sync found */
2955 ✗ return AVERROR_INVALIDDATA;
2956 }
2957
2958 /* return AVERROR_something if error or EOF. Return 0 if OK. */
2959 398894 static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size,
2960 const uint8_t **data)
2961 {
2962 398894 AVIOContext *pb = s->pb;
2963 int len;
2964
2965 // 192 bytes source packet that start with a 4 bytes TP_extra_header
2966 // followed by 188 bytes of TS packet. The sync byte is at offset 4, so skip
2967 // the first 4 bytes otherwise we'll end up syncing to the wrong packet.
2968
1/2
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✓ Branch 1 taken 398894 times.
 398894 if (raw_packet_size == TS_DVHS_PACKET_SIZE)
2969 ✗ avio_skip(pb, 4);
2970
2971 for (;;) {
2972 398953 len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data);
2973
2/2
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✓ Branch 1 taken 398583 times.
 398953 if (len != TS_PACKET_SIZE)
2974
2/2
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✓ Branch 1 taken 56 times.
 370 return len < 0 ? len : AVERROR_EOF;
2975 /* check packet sync byte */
2976
2/2
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✓ Branch 1 taken 398524 times.
 398583 if ((*data)[0] != SYNC_BYTE) {
2977 /* find a new packet start */
2978
2979
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 59 times.
 59 if (mpegts_resync(s, raw_packet_size, *data) < 0)
2980 ✗ return AVERROR(EAGAIN);
2981 else
2982 59 continue;
2983 } else {
2984 398524 break;
2985 }
2986 }
2987 398524 return 0;
2988 }
2989
2990 398524 static void finished_reading_packet(AVFormatContext *s, int raw_packet_size)
2991 {
2992 398524 AVIOContext *pb = s->pb;
2993 int skip;
2994
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 398524 times.
 398524 if (raw_packet_size == TS_DVHS_PACKET_SIZE)
2995 ✗ skip = raw_packet_size - TS_DVHS_PACKET_SIZE;
2996 else
2997 398524 skip = raw_packet_size - TS_PACKET_SIZE;
2998
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 398524 times.
 398524 if (skip > 0)
2999 ✗ avio_skip(pb, skip);
3000 398524 }
3001
3002 29242 static int handle_packets(MpegTSContext *ts, int64_t nb_packets)
3003 {
3004 29242 AVFormatContext *s = ts->stream;
3005 uint8_t packet[TS_PACKET_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
3006 const uint8_t *data;
3007 int64_t packet_num;
3008 29242 int ret = 0;
3009
3010
2/2
✓ Branch 1 taken 260 times.
✓ Branch 2 taken 28982 times.
 29242 if (avio_tell(s->pb) != ts->last_pos) {
3011 int i;
3012 260 av_log(ts->stream, AV_LOG_TRACE, "Skipping after seek\n");
3013 /* seek detected, flush pes buffer */
3014
2/2
✓ Branch 0 taken 2129920 times.
✓ Branch 1 taken 260 times.
 2130180 for (i = 0; i < NB_PID_MAX; i++) {
3015
2/2
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✓ Branch 1 taken 2128297 times.
 2129920 if (ts->pids[i]) {
3016
2/2
✓ Branch 0 taken 559 times.
✓ Branch 1 taken 1064 times.
 1623 if (ts->pids[i]->type == MPEGTS_PES) {
3017 559 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3018 559 av_buffer_unref(&pes->buffer);
3019 559 pes->data_index = 0;
3020 559 pes->state = MPEGTS_SKIP; /* skip until pes header */
3021
1/2
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✗ Branch 1 not taken.
 1064 } else if (ts->pids[i]->type == MPEGTS_SECTION) {
3022 1064 ts->pids[i]->u.section_filter.last_ver = -1;
3023 }
3024 1623 ts->pids[i]->last_cc = -1;
3025 1623 ts->pids[i]->last_pcr = -1;
3026 }
3027 }
3028 }
3029
3030 29242 ts->stop_parse = 0;
3031 29242 packet_num = 0;
3032 29242 memset(packet + TS_PACKET_SIZE, 0, AV_INPUT_BUFFER_PADDING_SIZE);
3033 for (;;) {
3034 427766 packet_num++;
3035
3/4
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✓ Branch 1 taken 419700 times.
✓ Branch 2 taken 8066 times.
✗ Branch 3 not taken.
 427766 if (nb_packets != 0 && packet_num >= nb_packets ||
3036
2/2
✓ Branch 0 taken 55 times.
✓ Branch 1 taken 427711 times.
 427766 ts->stop_parse > 1) {
3037 55 ret = AVERROR(EAGAIN);
3038 55 break;
3039 }
3040
2/2
✓ Branch 0 taken 28817 times.
✓ Branch 1 taken 398894 times.
 427711 if (ts->stop_parse > 0)
3041 28817 break;
3042
3043 398894 ret = read_packet(s, packet, ts->raw_packet_size, &data);
3044
2/2
✓ Branch 0 taken 370 times.
✓ Branch 1 taken 398524 times.
 398894 if (ret != 0)
3045 370 break;
3046 398524 ret = handle_packet(ts, data, avio_tell(s->pb));
3047 398524 finished_reading_packet(s, ts->raw_packet_size);
3048
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 398524 times.
 398524 if (ret != 0)
3049 ✗ break;
3050 }
3051 29242 ts->last_pos = avio_tell(s->pb);
3052 29242 return ret;
3053 }
3054
3055 7224 static int mpegts_probe(const AVProbeData *p)
3056 {
3057 7224 const int size = p->buf_size;
3058 7224 int maxscore = 0;
3059 7224 int sumscore = 0;
3060 int i;
3061 7224 int check_count = size / TS_FEC_PACKET_SIZE;
3062 #define CHECK_COUNT 10
3063 #define CHECK_BLOCK 100
3064
3065
2/2
✓ Branch 0 taken 13 times.
✓ Branch 1 taken 7211 times.
 7224 if (!check_count)
3066 13 return 0;
3067
3068
2/2
✓ Branch 0 taken 24065 times.
✓ Branch 1 taken 7211 times.
 31276 for (i = 0; i<check_count; i+=CHECK_BLOCK) {
3069 24065 int left = FFMIN(check_count - i, CHECK_BLOCK);
3070 24065 int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , 1);
3071 24065 int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, 1);
3072 24065 int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , 1);
3073 24065 score = FFMAX3(score, dvhs_score, fec_score);
3074 24065 sumscore += score;
3075 24065 maxscore = FFMAX(maxscore, score);
3076 }
3077
3078 7211 sumscore = sumscore * CHECK_COUNT / check_count;
3079 7211 maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK;
3080
3081 ff_dlog(0, "TS score: %d %d\n", sumscore, maxscore);
3082
3083
3/4
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✓ Branch 1 taken 3995 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 3216 times.
 7211 if (check_count > CHECK_COUNT && sumscore > 6) {
3084 ✗ return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT;
3085
4/4
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✓ Branch 1 taken 355 times.
✓ Branch 2 taken 47 times.
✓ Branch 3 taken 6809 times.
 7211 } else if (check_count >= CHECK_COUNT && sumscore > 6) {
3086 47 return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3087
3/4
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✓ Branch 1 taken 355 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 6809 times.
 7164 } else if (check_count >= CHECK_COUNT && maxscore > 6) {
3088 ✗ return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT;
3089
2/2
✓ Branch 0 taken 5 times.
✓ Branch 1 taken 7159 times.
 7164 } else if (sumscore > 6) {
3090 5 return 2;
3091 } else {
3092 7159 return 0;
3093 }
3094 }
3095
3096 /* return the 90kHz PCR and the extension for the 27MHz PCR. return
3097 * (-1) if not available */
3098 59542 static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet)
3099 {
3100 int afc, len, flags;
3101 const uint8_t *p;
3102 unsigned int v;
3103
3104 59542 afc = (packet[3] >> 4) & 3;
3105
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 59542 if (afc <= 1)
3106 ✗ return AVERROR_INVALIDDATA;
3107 59542 p = packet + 4;
3108 59542 len = p[0];
3109 59542 p++;
3110
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 59542 if (len == 0)
3111 38 return AVERROR_INVALIDDATA;
3112 59504 flags = *p++;
3113 59504 len--;
3114
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 59504 if (!(flags & 0x10))
3115 31926 return AVERROR_INVALIDDATA;
3116
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 27578 if (len < 6)
3117 ✗ return AVERROR_INVALIDDATA;
3118 27578 v = AV_RB32(p);
3119 27578 *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7);
3120 27578 *ppcr_low = ((p[4] & 1) << 8) | p[5];
3121 27578 return 0;
3122 }
3123
3124 110 static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) {
3125
3126 /* NOTE: We attempt to seek on non-seekable files as well, as the
3127 * probe buffer usually is big enough. Only warn if the seek failed
3128 * on files where the seek should work. */
3129
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 110 if (avio_seek(pb, pos, SEEK_SET) < 0)
3130 ✗ av_log(s, (pb->seekable & AVIO_SEEKABLE_NORMAL) ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n");
3131 110 }
3132
3133 55 static int mpegts_read_header(AVFormatContext *s)
3134 {
3135 55 MpegTSContext *ts = s->priv_data;
3136 55 AVIOContext *pb = s->pb;
3137 55 int64_t pos, probesize = s->probesize;
3138 55 int64_t seekback = FFMAX(s->probesize, (int64_t)ts->resync_size + PROBE_PACKET_MAX_BUF);
3139
3140
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 55 if (ffio_ensure_seekback(pb, seekback) < 0)
3141 ✗ av_log(s, AV_LOG_WARNING, "Failed to allocate buffers for seekback\n");
3142
3143 55 pos = avio_tell(pb);
3144 55 ts->raw_packet_size = get_packet_size(s);
3145
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 55 if (ts->raw_packet_size <= 0) {
3146 ✗ av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n");
3147 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3148 }
3149 55 ts->stream = s;
3150 55 ts->auto_guess = 0;
3151
3152
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 55 if (s->iformat == &ff_mpegts_demuxer.p) {
3153 /* normal demux */
3154
3155 /* first do a scan to get all the services */
3156 55 seek_back(s, pb, pos);
3157
3158 55 mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3159 55 mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3160 55 mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3161
3162 55 handle_packets(ts, probesize / ts->raw_packet_size);
3163 /* if could not find service, enable auto_guess */
3164
3165 55 ts->auto_guess = 1;
3166
3167 55 av_log(ts->stream, AV_LOG_TRACE, "tuning done\n");
3168
3169 55 s->ctx_flags |= AVFMTCTX_NOHEADER;
3170 } else {
3171 AVStream *st;
3172 int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l;
3173 int64_t pcrs[2], pcr_h;
3174 uint8_t packet[TS_PACKET_SIZE];
3175 const uint8_t *data;
3176
3177 /* only read packets */
3178
3179 ✗ st = avformat_new_stream(s, NULL);
3180 ✗ if (!st)
3181 ✗ return AVERROR(ENOMEM);
3182 ✗ avpriv_set_pts_info(st, 60, 1, 27000000);
3183 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
3184 ✗ st->codecpar->codec_id = AV_CODEC_ID_MPEG2TS;
3185
3186 /* we iterate until we find two PCRs to estimate the bitrate */
3187 ✗ pcr_pid = -1;
3188 ✗ nb_pcrs = 0;
3189 ✗ nb_packets = 0;
3190 for (;;) {
3191 ✗ ret = read_packet(s, packet, ts->raw_packet_size, &data);
3192 ✗ if (ret < 0)
3193 ✗ return ret;
3194 ✗ pid = AV_RB16(data + 1) & 0x1fff;
3195 ✗ if ((pcr_pid == -1 || pcr_pid == pid) &&
3196 ✗ parse_pcr(&pcr_h, &pcr_l, data) == 0) {
3197 ✗ finished_reading_packet(s, ts->raw_packet_size);
3198 ✗ pcr_pid = pid;
3199 ✗ pcrs[nb_pcrs] = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
3200 ✗ nb_pcrs++;
3201 ✗ if (nb_pcrs >= 2) {
3202 ✗ if (pcrs[1] - pcrs[0] > 0) {
3203 /* the difference needs to be positive to make sense for bitrate computation */
3204 ✗ break;
3205 } else {
3206 ✗ av_log(ts->stream, AV_LOG_WARNING, "invalid pcr pair %"PRId64" >= %"PRId64"\n", pcrs[0], pcrs[1]);
3207 ✗ pcrs[0] = pcrs[1];
3208 ✗ nb_pcrs--;
3209 }
3210 }
3211 } else {
3212 ✗ finished_reading_packet(s, ts->raw_packet_size);
3213 }
3214 ✗ nb_packets++;
3215 }
3216
3217 /* NOTE1: the bitrate is computed without the FEC */
3218 /* NOTE2: it is only the bitrate of the start of the stream */
3219 ✗ ts->pcr_incr = pcrs[1] - pcrs[0];
3220 ✗ ts->cur_pcr = pcrs[0] - ts->pcr_incr * (nb_packets - 1);
3221 ✗ s->bit_rate = TS_PACKET_SIZE * 8 * 27000000LL / ts->pcr_incr;
3222 ✗ st->codecpar->bit_rate = s->bit_rate;
3223 ✗ st->start_time = ts->cur_pcr;
3224 ✗ av_log(ts->stream, AV_LOG_TRACE, "start=%0.3f pcr=%0.3f incr=%"PRId64"\n",
3225 ✗ st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr);
3226 }
3227
3228 55 seek_back(s, pb, pos);
3229 55 return 0;
3230 }
3231
3232 #define MAX_PACKET_READAHEAD ((128 * 1024) / 188)
3233
3234 ✗ static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt)
3235 {
3236 ✗ MpegTSContext *ts = s->priv_data;
3237 int ret, i;
3238 int64_t pcr_h, next_pcr_h, pos;
3239 int pcr_l, next_pcr_l;
3240 uint8_t pcr_buf[12];
3241 const uint8_t *data;
3242
3243 ✗ if ((ret = av_new_packet(pkt, TS_PACKET_SIZE)) < 0)
3244 ✗ return ret;
3245 ✗ ret = read_packet(s, pkt->data, ts->raw_packet_size, &data);
3246 ✗ pkt->pos = avio_tell(s->pb);
3247 ✗ if (ret < 0) {
3248 ✗ return ret;
3249 }
3250 ✗ if (data != pkt->data)
3251 ✗ memcpy(pkt->data, data, TS_PACKET_SIZE);
3252 ✗ finished_reading_packet(s, ts->raw_packet_size);
3253 ✗ if (ts->mpeg2ts_compute_pcr) {
3254 /* compute exact PCR for each packet */
3255 ✗ if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
3256 /* we read the next PCR (XXX: optimize it by using a bigger buffer */
3257 ✗ pos = avio_tell(s->pb);
3258 ✗ for (i = 0; i < MAX_PACKET_READAHEAD; i++) {
3259 ✗ avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
3260 ✗ avio_read(s->pb, pcr_buf, 12);
3261 ✗ if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
3262 /* XXX: not precise enough */
3263 ✗ ts->pcr_incr =
3264 ✗ ((next_pcr_h - pcr_h) * SYSTEM_CLOCK_FREQUENCY_DIVISOR + (next_pcr_l - pcr_l)) /
3265 ✗ (i + 1);
3266 ✗ break;
3267 }
3268 }
3269 ✗ avio_seek(s->pb, pos, SEEK_SET);
3270 /* no next PCR found: we use previous increment */
3271 ✗ ts->cur_pcr = pcr_h * SYSTEM_CLOCK_FREQUENCY_DIVISOR + pcr_l;
3272 }
3273 ✗ pkt->pts = ts->cur_pcr;
3274 ✗ pkt->duration = ts->pcr_incr;
3275 ✗ ts->cur_pcr += ts->pcr_incr;
3276 }
3277 ✗ pkt->stream_index = 0;
3278 ✗ return 0;
3279 }
3280
3281 29187 static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt)
3282 {
3283 29187 MpegTSContext *ts = s->priv_data;
3284 int ret, i;
3285
3286 29187 pkt->size = -1;
3287 29187 ts->pkt = pkt;
3288 29187 ret = handle_packets(ts, 0);
3289
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 29187 if (ret < 0) {
3290 370 av_packet_unref(ts->pkt);
3291 /* flush pes data left */
3292
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 2194316 for (i = 0; i < NB_PID_MAX; i++)
3293
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 2194109 if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) {
3294 857 PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
3295
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 857 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
3296 163 ret = new_pes_packet(pes, pkt);
3297
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 163 if (ret < 0)
3298 ✗ return ret;
3299 163 pes->state = MPEGTS_SKIP;
3300 163 ret = 0;
3301 163 break;
3302 }
3303 }
3304 }
3305
3306
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 29187 if (!ret && pkt->size < 0)
3307 ✗ ret = AVERROR_INVALIDDATA;
3308 29187 return ret;
3309 }
3310
3311 55 static void mpegts_free(MpegTSContext *ts)
3312 {
3313 int i;
3314
3315 55 clear_programs(ts);
3316
3317
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 1815 for (i = 0; i < FF_ARRAY_ELEMS(ts->pools); i++)
3318 1760 av_buffer_pool_uninit(&ts->pools[i]);
3319
3320
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 450615 for (i = 0; i < NB_PID_MAX; i++)
3321
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 450560 if (ts->pids[i])
3322 353 mpegts_close_filter(ts, ts->pids[i]);
3323 55 }
3324
3325 55 static int mpegts_read_close(AVFormatContext *s)
3326 {
3327 55 MpegTSContext *ts = s->priv_data;
3328 55 mpegts_free(ts);
3329 55 return 0;
3330 }
3331
3332 ✗ static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
3333 int64_t *ppos, int64_t pos_limit)
3334 {
3335 ✗ MpegTSContext *ts = s->priv_data;
3336 int64_t pos, timestamp;
3337 uint8_t buf[TS_PACKET_SIZE];
3338 ✗ int pcr_l, pcr_pid =
3339 ✗ ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid;
3340 ✗ int pos47 = ts->pos47_full % ts->raw_packet_size;
3341 ✗ pos =
3342 ✗ ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) *
3343 ✗ ts->raw_packet_size + pos47;
3344 ✗ while(pos < pos_limit) {
3345 ✗ if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3346 ✗ return AV_NOPTS_VALUE;
3347 ✗ if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
3348 ✗ return AV_NOPTS_VALUE;
3349 ✗ if (buf[0] != SYNC_BYTE) {
3350 ✗ if (mpegts_resync(s, TS_PACKET_SIZE, buf) < 0)
3351 ✗ return AV_NOPTS_VALUE;
3352 ✗ pos = avio_tell(s->pb);
3353 ✗ continue;
3354 }
3355 ✗ if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
3356 ✗ parse_pcr(&timestamp, &pcr_l, buf) == 0) {
3357 ✗ *ppos = pos;
3358 ✗ return timestamp;
3359 }
3360 ✗ pos += ts->raw_packet_size;
3361 }
3362
3363 ✗ return AV_NOPTS_VALUE;
3364 }
3365
3366 90 static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index,
3367 int64_t *ppos, int64_t pos_limit)
3368 {
3369 90 MpegTSContext *ts = s->priv_data;
3370 AVPacket *pkt;
3371 int64_t pos;
3372 90 int pos47 = ts->pos47_full % ts->raw_packet_size;
3373 90 pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47;
3374 90 ff_read_frame_flush(s);
3375
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 90 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
3376 ✗ return AV_NOPTS_VALUE;
3377 90 pkt = av_packet_alloc();
3378
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 90 if (!pkt)
3379 ✗ return AV_NOPTS_VALUE;
3380
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 496 while(pos < pos_limit) {
3381 484 int ret = av_read_frame(s, pkt);
3382
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 484 if (ret < 0) {
3383 18 av_packet_free(&pkt);
3384 18 return AV_NOPTS_VALUE;
3385 }
3386
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 466 if (pkt->dts != AV_NOPTS_VALUE && pkt->pos >= 0) {
3387 163 ff_reduce_index(s, pkt->stream_index);
3388 163 av_add_index_entry(s->streams[pkt->stream_index], pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */);
3389
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 163 if (pkt->stream_index == stream_index && pkt->pos >= *ppos) {
3390 60 int64_t dts = pkt->dts;
3391 60 *ppos = pkt->pos;
3392 60 av_packet_free(&pkt);
3393 60 return dts;
3394 }
3395 }
3396 406 pos = pkt->pos;
3397 406 av_packet_unref(pkt);
3398 }
3399
3400 12 av_packet_free(&pkt);
3401 12 return AV_NOPTS_VALUE;
3402 }
3403
3404 /**************************************************************/
3405 /* parsing functions - called from other demuxers such as RTP */
3406
3407 ✗ MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s)
3408 {
3409 MpegTSContext *ts;
3410
3411 ✗ ts = av_mallocz(sizeof(MpegTSContext));
3412 ✗ if (!ts)
3413 ✗ return NULL;
3414 /* no stream case, currently used by RTP */
3415 ✗ ts->raw_packet_size = TS_PACKET_SIZE;
3416 ✗ ts->max_packet_size = 2048000;
3417 ✗ ts->stream = s;
3418 ✗ ts->auto_guess = 1;
3419
3420 ✗ mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
3421 ✗ mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
3422 ✗ mpegts_open_section_filter(ts, EIT_PID, eit_cb, ts, 1);
3423
3424 ✗ return ts;
3425 }
3426
3427 /* return the consumed length if a packet was output, or -1 if no
3428 * packet is output */
3429 ✗ int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt,
3430 const uint8_t *buf, int len)
3431 {
3432 int len1;
3433
3434 ✗ len1 = len;
3435 ✗ ts->pkt = pkt;
3436 for (;;) {
3437 ✗ ts->stop_parse = 0;
3438 ✗ if (len < TS_PACKET_SIZE)
3439 ✗ return AVERROR_INVALIDDATA;
3440 ✗ if (buf[0] != SYNC_BYTE) {
3441 ✗ buf++;
3442 ✗ len--;
3443 } else {
3444 ✗ handle_packet(ts, buf, len1 - len + TS_PACKET_SIZE);
3445 ✗ buf += TS_PACKET_SIZE;
3446 ✗ len -= TS_PACKET_SIZE;
3447 ✗ if (ts->stop_parse == 1)
3448 ✗ break;
3449 }
3450 }
3451 ✗ return len1 - len;
3452 }
3453
3454 ✗ void avpriv_mpegts_parse_close(MpegTSContext *ts)
3455 {
3456 ✗ mpegts_free(ts);
3457 ✗ av_free(ts);
3458 ✗ }
3459
3460 const FFInputFormat ff_mpegts_demuxer = {
3461 .p.name = "mpegts",
3462 .p.long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
3463 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3464 .p.priv_class = &mpegts_class,
3465 .priv_data_size = sizeof(MpegTSContext),
3466 .read_probe = mpegts_probe,
3467 .read_header = mpegts_read_header,
3468 .read_packet = mpegts_read_packet,
3469 .read_close = mpegts_read_close,
3470 .read_timestamp = mpegts_get_dts,
3471 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3472 };
3473
3474 const FFInputFormat ff_mpegtsraw_demuxer = {
3475 .p.name = "mpegtsraw",
3476 .p.long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"),
3477 .p.flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT,
3478 .p.priv_class = &mpegtsraw_class,
3479 .priv_data_size = sizeof(MpegTSContext),
3480 .read_header = mpegts_read_header,
3481 .read_packet = mpegts_raw_read_packet,
3482 .read_close = mpegts_read_close,
3483 .read_timestamp = mpegts_get_dts,
3484 .flags_internal = FF_INFMT_FLAG_PREFER_CODEC_FRAMERATE,
3485 };
3486