FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/mpegts.c
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 1107 1924 57.5%
Functions: 49 70 70.0%
Branches: 604 1291 46.8%

Line Branch Exec Source
1 /*
2 * MPEG-2 transport stream (aka DVB) demuxer
3 * Copyright (c) 2002-2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include "libavutil/buffer.h"
25 #include "libavutil/common.h"
26 #include "libavutil/crc.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/log.h"
30 #include "libavutil/dict.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/dovi_meta.h"
35 #include "libavcodec/avcodec.h"
36 #include "libavcodec/bytestream.h"
37 #include "libavcodec/defs.h"
38 #include "libavcodec/get_bits.h"
39 #include "libavcodec/opus.h"
40 #include "avformat.h"
41 #include "mpegts.h"
42 #include "internal.h"
43 #include "avio_internal.h"
44 #include "demux.h"
45 #include "mpeg.h"
46 #include "isom.h"
47 #if CONFIG_ICONV
48 #include <iconv.h>
49 #endif
50
51 /* maximum size in which we look for synchronization if
52 * synchronization is lost */
53 #define MAX_RESYNC_SIZE 65536
54
55 #define MAX_MP4_DESCR_COUNT 16
56
57 #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \
58 do { \
59 if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \
60 (modulus) = (dividend) % (divisor); \
61 (prev_dividend) = (dividend); \
62 } while (0)
63
64 #define PROBE_PACKET_MAX_BUF 8192
65 #define PROBE_PACKET_MARGIN 5
66
67 enum MpegTSFilterType {
68 MPEGTS_PES,
69 MPEGTS_SECTION,
70 MPEGTS_PCR,
71 };
72
73 typedef struct MpegTSFilter MpegTSFilter;
74
75 typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len,
76 int is_start, int64_t pos);
77
78 typedef struct MpegTSPESFilter {
79 PESCallback *pes_cb;
80 void *opaque;
81 } MpegTSPESFilter;
82
83 typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len);
84
85 typedef void SetServiceCallback (void *opaque, int ret);
86
87 typedef struct MpegTSSectionFilter {
88 int section_index;
89 int section_h_size;
90 int last_ver;
91 unsigned crc;
92 unsigned last_crc;
93 uint8_t *section_buf;
94 unsigned int check_crc : 1;
95 unsigned int end_of_section_reached : 1;
96 SectionCallback *section_cb;
97 void *opaque;
98 } MpegTSSectionFilter;
99
100 struct MpegTSFilter {
101 int pid;
102 int es_id;
103 int last_cc; /* last cc code (-1 if first packet) */
104 int64_t last_pcr;
105 int discard;
106 enum MpegTSFilterType type;
107 union {
108 MpegTSPESFilter pes_filter;
109 MpegTSSectionFilter section_filter;
110 } u;
111 };
112
113 struct Stream {
114 int idx;
115 int stream_identifier;
116 };
117
118 #define MAX_STREAMS_PER_PROGRAM 128
119 #define MAX_PIDS_PER_PROGRAM (MAX_STREAMS_PER_PROGRAM + 2)
120 struct Program {
121 unsigned int id; // program id/service id
122 unsigned int nb_pids;
123 unsigned int pids[MAX_PIDS_PER_PROGRAM];
124 unsigned int nb_streams;
125 struct Stream streams[MAX_STREAMS_PER_PROGRAM];
126
127 /** have we found pmt for this program */
128 int pmt_found;
129 };
130
131 struct MpegTSContext {
132 const AVClass *class;
133 /* user data */
134 AVFormatContext *stream;
135 /** raw packet size, including FEC if present */
136 int raw_packet_size;
137
138 int64_t pos47_full;
139
140 /** if true, all pids are analyzed to find streams */
141 int auto_guess;
142
143 /** compute exact PCR for each transport stream packet */
144 int mpeg2ts_compute_pcr;
145
146 /** fix dvb teletext pts */
147 int fix_teletext_pts;
148
149 int64_t cur_pcr; /**< used to estimate the exact PCR */
150 int64_t pcr_incr; /**< used to estimate the exact PCR */
151
152 /* data needed to handle file based ts */
153 /** stop parsing loop */
154 int stop_parse;
155 /** packet containing Audio/Video data */
156 AVPacket *pkt;
157 /** to detect seek */
158 int64_t last_pos;
159
160 int skip_changes;
161 int skip_clear;
162 int skip_unknown_pmt;
163
164 int scan_all_pmts;
165
166 int resync_size;
167 int merge_pmt_versions;
168 int max_packet_size;
169
170 /******************************************/
171 /* private mpegts data */
172 /* scan context */
173 /** structure to keep track of Program->pids mapping */
174 unsigned int nb_prg;
175 struct Program *prg;
176
177 int8_t crc_validity[NB_PID_MAX];
178 /** filters for various streams specified by PMT + for the PAT and PMT */
179 MpegTSFilter *pids[NB_PID_MAX];
180 int current_pid;
181
182 AVStream *epg_stream;
183 AVBufferPool* pools[32];
184 };
185
186 #define MPEGTS_OPTIONS \
187 { "resync_size", "set size limit for looking up a new synchronization", offsetof(MpegTSContext, resync_size), AV_OPT_TYPE_INT, { .i64 = MAX_RESYNC_SIZE}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }
188
189 static const AVOption options[] = {
190 MPEGTS_OPTIONS,
191 {"fix_teletext_pts", "try to fix pts values of dvb teletext streams", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_BOOL,
192 {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
193 {"ts_packetsize", "output option carrying the raw packet size", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
194 {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
195 {"scan_all_pmts", "scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_BOOL,
196 {.i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM },
197 {"skip_unknown_pmt", "skip PMTs for programs not advertised in the PAT", offsetof(MpegTSContext, skip_unknown_pmt), AV_OPT_TYPE_BOOL,
198 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
199 {"merge_pmt_versions", "re-use streams when PMT's version/pids change", offsetof(MpegTSContext, merge_pmt_versions), AV_OPT_TYPE_BOOL,
200 {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
201 {"skip_changes", "skip changing / adding streams / programs", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_BOOL,
202 {.i64 = 0}, 0, 1, 0 },
203 {"skip_clear", "skip clearing programs", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_BOOL,
204 {.i64 = 0}, 0, 1, 0 },
205 {"max_packet_size", "maximum size of emitted packet", offsetof(MpegTSContext, max_packet_size), AV_OPT_TYPE_INT,
206 {.i64 = 204800}, 1, INT_MAX/2, AV_OPT_FLAG_DECODING_PARAM },
207 { NULL },
208 };
209
210 static const AVClass mpegts_class = {
211 .class_name = "mpegts demuxer",
212 .item_name = av_default_item_name,
213 .option = options,
214 .version = LIBAVUTIL_VERSION_INT,
215 };
216
217 static const AVOption raw_options[] = {
218 MPEGTS_OPTIONS,
219 { "compute_pcr", "compute exact PCR for each transport stream packet",
220 offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_BOOL,
221 { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
222 { "ts_packetsize", "output option carrying the raw packet size",
223 offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT,
224 { .i64 = 0 }, 0, 0,
225 AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
226 { NULL },
227 };
228
229 static const AVClass mpegtsraw_class = {
230 .class_name = "mpegtsraw demuxer",
231 .item_name = av_default_item_name,
232 .option = raw_options,
233 .version = LIBAVUTIL_VERSION_INT,
234 };
235
236 /* TS stream handling */
237
238 enum MpegTSState {
239 MPEGTS_HEADER = 0,
240 MPEGTS_PESHEADER,
241 MPEGTS_PESHEADER_FILL,
242 MPEGTS_PAYLOAD,
243 MPEGTS_SKIP,
244 };
245
246 /* enough for PES header + length */
247 #define PES_START_SIZE 6
248 #define PES_HEADER_SIZE 9
249 #define MAX_PES_HEADER_SIZE (9 + 255)
250
251 typedef struct PESContext {
252 int pid;
253 int pcr_pid; /**< if -1 then all packets containing PCR are considered */
254 int stream_type;
255 MpegTSContext *ts;
256 AVFormatContext *stream;
257 AVStream *st;
258 AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */
259 enum MpegTSState state;
260 /* used to get the format */
261 int data_index;
262 int flags; /**< copied to the AVPacket flags */
263 int PES_packet_length;
264 int pes_header_size;
265 int extended_stream_id;
266 uint8_t stream_id;
267 int64_t pts, dts;
268 int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
269 uint8_t header[MAX_PES_HEADER_SIZE];
270 AVBufferRef *buffer;
271 SLConfigDescr sl;
272 int merged_st;
273 } PESContext;
274
275 extern const AVInputFormat ff_mpegts_demuxer;
276
277 473 static struct Program * get_program(MpegTSContext *ts, unsigned int programid)
278 {
279 int i;
280
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473 for (i = 0; i < ts->nb_prg; i++) {
281
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419 if (ts->prg[i].id == programid) {
282 419 return &ts->prg[i];
283 }
284 }
285 54 return NULL;
286 }
287
288 169 static void clear_avprogram(MpegTSContext *ts, unsigned int programid)
289 {
290 169 AVProgram *prg = NULL;
291 int i;
292
293
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169 for (i = 0; i < ts->stream->nb_programs; i++)
294
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169 if (ts->stream->programs[i]->id == programid) {
295 169 prg = ts->stream->programs[i];
296 169 break;
297 }
298
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169 if (!prg)
299 return;
300 169 prg->nb_stream_indexes = 0;
301 }
302
303 317 static void clear_program(struct Program *p)
304 {
305
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317 if (!p)
306 return;
307 317 p->nb_pids = 0;
308 317 p->nb_streams = 0;
309 317 p->pmt_found = 0;
310 }
311
312 54 static void clear_programs(MpegTSContext *ts)
313 {
314 54 av_freep(&ts->prg);
315 54 ts->nb_prg = 0;
316 54 }
317
318 210 static struct Program * add_program(MpegTSContext *ts, unsigned int programid)
319 {
320 210 struct Program *p = get_program(ts, programid);
321
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210 if (p)
322 156 return p;
323
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54 if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) {
324 ts->nb_prg = 0;
325 return NULL;
326 }
327 54 p = &ts->prg[ts->nb_prg];
328 54 p->id = programid;
329 54 clear_program(p);
330 54 ts->nb_prg++;
331 54 return p;
332 }
333
334 1255 static void add_pid_to_program(struct Program *p, unsigned int pid)
335 {
336 int i;
337
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1255 if (!p)
338 return;
339
340
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1255 if (p->nb_pids >= MAX_PIDS_PER_PROGRAM)
341 return;
342
343
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2451 for (i = 0; i < p->nb_pids; i++)
344
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1621 if (p->pids[i] == pid)
345 425 return;
346
347 830 p->pids[p->nb_pids++] = pid;
348 }
349
350 263 static void update_av_program_info(AVFormatContext *s, unsigned int programid,
351 unsigned int pid, int version)
352 {
353 int i;
354
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263 for (i = 0; i < s->nb_programs; i++) {
355 263 AVProgram *program = s->programs[i];
356
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263 if (program->id == programid) {
357 263 int old_pcr_pid = program->pcr_pid,
358 263 old_version = program->pmt_version;
359 263 program->pcr_pid = pid;
360 263 program->pmt_version = version;
361
362
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263 if (old_version != -1 && old_version != version) {
363 13 av_log(s, AV_LOG_VERBOSE,
364 "detected PMT change (program=%d, version=%d/%d, pcr_pid=0x%x/0x%x)\n",
365 programid, old_version, version, old_pcr_pid, pid);
366 }
367 263 break;
368 }
369 }
370 263 }
371
372 /**
373 * @brief discard_pid() decides if the pid is to be discarded according
374 * to caller's programs selection
375 * @param ts : - TS context
376 * @param pid : - pid
377 * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
378 * 0 otherwise
379 */
380 36520 static int discard_pid(MpegTSContext *ts, unsigned int pid)
381 {
382 int i, j, k;
383 36520 int used = 0, discarded = 0;
384 struct Program *p;
385
386
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36520 if (pid == PAT_PID)
387 3017 return 0;
388
389 /* If none of the programs have .discard=AVDISCARD_ALL then there's
390 * no way we have to discard this packet */
391
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66979 for (k = 0; k < ts->stream->nb_programs; k++)
392
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33476 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
393 break;
394
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33503 if (k == ts->stream->nb_programs)
395 33503 return 0;
396
397 for (i = 0; i < ts->nb_prg; i++) {
398 p = &ts->prg[i];
399 for (j = 0; j < p->nb_pids; j++) {
400 if (p->pids[j] != pid)
401 continue;
402 // is program with id p->id set to be discarded?
403 for (k = 0; k < ts->stream->nb_programs; k++) {
404 if (ts->stream->programs[k]->id == p->id) {
405 if (ts->stream->programs[k]->discard == AVDISCARD_ALL)
406 discarded++;
407 else
408 used++;
409 }
410 }
411 }
412 }
413
414 return !used && discarded;
415 }
416
417 /**
418 * Assemble PES packets out of TS packets, and then call the "section_cb"
419 * function when they are complete.
420 */
421 6492 static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1,
422 const uint8_t *buf, int buf_size, int is_start)
423 {
424 6492 MpegTSSectionFilter *tss = &tss1->u.section_filter;
425 6492 uint8_t *cur_section_buf = NULL;
426 int len, offset;
427
428
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6492 if (is_start) {
429 6457 memcpy(tss->section_buf, buf, buf_size);
430 6457 tss->section_index = buf_size;
431 6457 tss->section_h_size = -1;
432 6457 tss->end_of_section_reached = 0;
433 } else {
434
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35 if (tss->end_of_section_reached)
435 return;
436 35 len = MAX_SECTION_SIZE - tss->section_index;
437
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35 if (buf_size < len)
438 35 len = buf_size;
439 35 memcpy(tss->section_buf + tss->section_index, buf, len);
440 35 tss->section_index += len;
441 }
442
443 6492 offset = 0;
444 6492 cur_section_buf = tss->section_buf;
445
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12949 while (cur_section_buf - tss->section_buf < MAX_SECTION_SIZE && cur_section_buf[0] != 0xff) {
446 /* compute section length if possible */
447
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6700 if (tss->section_h_size == -1 && tss->section_index - offset >= 3) {
448 6492 len = (AV_RB16(cur_section_buf + 1) & 0xfff) + 3;
449
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6492 if (len > MAX_SECTION_SIZE)
450 return;
451 6492 tss->section_h_size = len;
452 }
453
454
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6700 if (tss->section_h_size != -1 &&
455
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6492 tss->section_index >= offset + tss->section_h_size) {
456 6457 int crc_valid = 1;
457 6457 tss->end_of_section_reached = 1;
458
459
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6457 if (tss->check_crc) {
460 6457 crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, cur_section_buf, tss->section_h_size);
461
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6457 if (tss->section_h_size >= 4)
462 6457 tss->crc = AV_RB32(cur_section_buf + tss->section_h_size - 4);
463
464
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6457 if (crc_valid) {
465 6457 ts->crc_validity[ tss1->pid ] = 100;
466 }else if (ts->crc_validity[ tss1->pid ] > -10) {
467 ts->crc_validity[ tss1->pid ]--;
468 }else
469 crc_valid = 2;
470 }
471
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6457 if (crc_valid) {
472 6457 tss->section_cb(tss1, cur_section_buf, tss->section_h_size);
473
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6457 if (crc_valid != 1)
474 tss->last_ver = -1;
475 }
476
477 6457 cur_section_buf += tss->section_h_size;
478 6457 offset += tss->section_h_size;
479 6457 tss->section_h_size = -1;
480 } else {
481 243 tss->section_h_size = -1;
482 243 tss->end_of_section_reached = 0;
483 243 break;
484 }
485 }
486 }
487
488 339 static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid,
489 enum MpegTSFilterType type)
490 {
491 MpegTSFilter *filter;
492
493 339 av_log(ts->stream, AV_LOG_TRACE, "Filter: pid=0x%x type=%d\n", pid, type);
494
495
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339 if (pid >= NB_PID_MAX || ts->pids[pid])
496 return NULL;
497 339 filter = av_mallocz(sizeof(MpegTSFilter));
498
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339 if (!filter)
499 return NULL;
500 339 ts->pids[pid] = filter;
501
502 339 filter->type = type;
503 339 filter->pid = pid;
504 339 filter->es_id = -1;
505 339 filter->last_cc = -1;
506 339 filter->last_pcr= -1;
507
508 339 return filter;
509 }
510
511 221 static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts,
512 unsigned int pid,
513 SectionCallback *section_cb,
514 void *opaque,
515 int check_crc)
516 {
517 MpegTSFilter *filter;
518 MpegTSSectionFilter *sec;
519 221 uint8_t *section_buf = av_mallocz(MAX_SECTION_SIZE);
520
521
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221 if (!section_buf)
522 return NULL;
523
524
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221 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) {
525 av_free(section_buf);
526 return NULL;
527 }
528 221 sec = &filter->u.section_filter;
529 221 sec->section_cb = section_cb;
530 221 sec->opaque = opaque;
531 221 sec->section_buf = section_buf;
532 221 sec->check_crc = check_crc;
533 221 sec->last_ver = -1;
534
535 221 return filter;
536 }
537
538 118 static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
539 PESCallback *pes_cb,
540 void *opaque)
541 {
542 MpegTSFilter *filter;
543 MpegTSPESFilter *pes;
544
545
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118 if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES)))
546 return NULL;
547
548 118 pes = &filter->u.pes_filter;
549 118 pes->pes_cb = pes_cb;
550 118 pes->opaque = opaque;
551 118 return filter;
552 }
553
554 static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid)
555 {
556 return mpegts_open_filter(ts, pid, MPEGTS_PCR);
557 }
558
559 339 static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
560 {
561 int pid;
562
563 339 pid = filter->pid;
564
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339 if (filter->type == MPEGTS_SECTION)
565 221 av_freep(&filter->u.section_filter.section_buf);
566
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118 else if (filter->type == MPEGTS_PES) {
567 118 PESContext *pes = filter->u.pes_filter.opaque;
568 118 av_buffer_unref(&pes->buffer);
569 /* referenced private data will be freed later in
570 * avformat_close_input (pes->st->priv_data == pes) */
571
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118 if (!pes->st || pes->merged_st) {
572 21 av_freep(&filter->u.pes_filter.opaque);
573 }
574 }
575
576 339 av_free(filter);
577 339 ts->pids[pid] = NULL;
578 339 }
579
580 36504 static int analyze(const uint8_t *buf, int size, int packet_size,
581 int probe)
582 {
583 int stat[TS_MAX_PACKET_SIZE];
584 36504 int stat_all = 0;
585 int i;
586 36504 int best_score = 0;
587
588 36504 memset(stat, 0, packet_size * sizeof(*stat));
589
590
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407846816 for (i = 0; i < size - 3; i++) {
591
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407810312 if (buf[i] == 0x47) {
592 744215 int pid = AV_RB16(buf+1) & 0x1FFF;
593 744215 int asc = buf[i + 3] & 0x30;
594
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744215 if (!probe || pid == 0x1FFF || asc) {
595 600186 int x = i % packet_size;
596 600186 stat[x]++;
597 600186 stat_all++;
598
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600186 if (stat[x] > best_score) {
599 57508 best_score = stat[x];
600 }
601 }
602 }
603 }
604
605 36504 return best_score - FFMAX(stat_all - 10*best_score, 0)/10;
606 }
607
608 /* autodetect fec presence */
609 112 static int get_packet_size(AVFormatContext* s)
610 {
611 int score, fec_score, dvhs_score;
612 int margin;
613 int ret;
614
615 /*init buffer to store stream for probing */
616 112 uint8_t buf[PROBE_PACKET_MAX_BUF] = {0};
617 112 int buf_size = 0;
618 112 int max_iterations = 16;
619
620
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112 while (buf_size < PROBE_PACKET_MAX_BUF && max_iterations--) {
621 112 ret = avio_read_partial(s->pb, buf + buf_size, PROBE_PACKET_MAX_BUF - buf_size);
622
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112 if (ret < 0)
623 return AVERROR_INVALIDDATA;
624 112 buf_size += ret;
625
626 112 score = analyze(buf, buf_size, TS_PACKET_SIZE, 0);
627 112 dvhs_score = analyze(buf, buf_size, TS_DVHS_PACKET_SIZE, 0);
628 112 fec_score = analyze(buf, buf_size, TS_FEC_PACKET_SIZE, 0);
629 112 av_log(s, AV_LOG_TRACE, "Probe: %d, score: %d, dvhs_score: %d, fec_score: %d \n",
630 buf_size, score, dvhs_score, fec_score);
631
632 112 margin = mid_pred(score, fec_score, dvhs_score);
633
634
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112 if (buf_size < PROBE_PACKET_MAX_BUF)
635 1 margin += PROBE_PACKET_MARGIN; /*if buffer not filled */
636
637
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112 if (score > margin)
638 112 return TS_PACKET_SIZE;
639 else if (dvhs_score > margin)
640 return TS_DVHS_PACKET_SIZE;
641 else if (fec_score > margin)
642 return TS_FEC_PACKET_SIZE;
643 }
644 return AVERROR_INVALIDDATA;
645 }
646
647 typedef struct SectionHeader {
648 uint8_t tid;
649 uint16_t id;
650 uint8_t version;
651 uint8_t current_next;
652 uint8_t sec_num;
653 uint8_t last_sec_num;
654 } SectionHeader;
655
656 5810 static int skip_identical(const SectionHeader *h, MpegTSSectionFilter *tssf)
657 {
658
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5810 if (h->version == tssf->last_ver && tssf->last_crc == tssf->crc)
659 5237 return 1;
660
661 573 tssf->last_ver = h->version;
662 573 tssf->last_crc = tssf->crc;
663
664 573 return 0;
665 }
666
667 30974 static inline int get8(const uint8_t **pp, const uint8_t *p_end)
668 {
669 const uint8_t *p;
670 int c;
671
672 30974 p = *pp;
673
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30974 if (p >= p_end)
674 1373 return AVERROR_INVALIDDATA;
675 29601 c = *p++;
676 29601 *pp = p;
677 29601 return c;
678 }
679
680 9572 static inline int get16(const uint8_t **pp, const uint8_t *p_end)
681 {
682 const uint8_t *p;
683 int c;
684
685 9572 p = *pp;
686
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9572 if (1 >= p_end - p)
687 310 return AVERROR_INVALIDDATA;
688 9262 c = AV_RB16(p);
689 9262 p += 2;
690 9262 *pp = p;
691 9262 return c;
692 }
693
694 /* read and allocate a DVB string preceded by its length */
695 200 static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
696 {
697 int len;
698 const uint8_t *p;
699 char *str;
700
701 200 p = *pp;
702 200 len = get8(&p, p_end);
703
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200 if (len < 0)
704 return NULL;
705
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200 if (len > p_end - p)
706 return NULL;
707 #if CONFIG_ICONV
708
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200 if (len) {
709 200 const char *encodings[] = {
710 "ISO6937", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7",
711 "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11",
712 "", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "", "", "", "",
713 "", "UCS-2BE", "KSC_5601", "GB2312", "UCS-2BE", "UTF-8", "", "",
714 "", "", "", "", "", "", "", ""
715 };
716 iconv_t cd;
717 char *in, *out;
718 200 size_t inlen = len, outlen = inlen * 6 + 1;
719
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200 if (len >= 3 && p[0] == 0x10 && !p[1] && p[2] && p[2] <= 0xf && p[2] != 0xc) {
720 char iso8859[12];
721 snprintf(iso8859, sizeof(iso8859), "ISO-8859-%d", p[2]);
722 inlen -= 3;
723 in = (char *)p + 3;
724 cd = iconv_open("UTF-8", iso8859);
725
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200 } else if (p[0] < 0x20) {
726 8 inlen -= 1;
727 8 in = (char *)p + 1;
728 8 cd = iconv_open("UTF-8", encodings[*p]);
729 } else {
730 192 in = (char *)p;
731 192 cd = iconv_open("UTF-8", encodings[0]);
732 }
733
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200 if (cd == (iconv_t)-1)
734 goto no_iconv;
735 200 str = out = av_malloc(outlen);
736
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200 if (!str) {
737 iconv_close(cd);
738 200 return NULL;
739 }
740
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200 if (iconv(cd, &in, &inlen, &out, &outlen) == -1) {
741 iconv_close(cd);
742 av_freep(&str);
743 goto no_iconv;
744 }
745 200 iconv_close(cd);
746 200 *out = 0;
747 200 *pp = p + len;
748 200 return str;
749 }
750 no_iconv:
751 #endif
752 str = av_malloc(len + 1);
753 if (!str)
754 return NULL;
755 memcpy(str, p, len);
756 str[len] = '\0';
757 p += len;
758 *pp = p;
759 return str;
760 }
761
762 6455 static int parse_section_header(SectionHeader *h,
763 const uint8_t **pp, const uint8_t *p_end)
764 {
765 int val;
766
767 6455 val = get8(pp, p_end);
768
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6455 if (val < 0)
769 return val;
770 6455 h->tid = val;
771 6455 *pp += 2;
772 6455 val = get16(pp, p_end);
773
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6455 if (val < 0)
774 return val;
775 6455 h->id = val;
776 6455 val = get8(pp, p_end);
777
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6455 if (val < 0)
778 return val;
779 6455 h->version = (val >> 1) & 0x1f;
780 6455 h->current_next = val & 0x01;
781 6455 val = get8(pp, p_end);
782
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6455 if (val < 0)
783 return val;
784 6455 h->sec_num = val;
785 6455 val = get8(pp, p_end);
786
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6455 if (val < 0)
787 return val;
788 6455 h->last_sec_num = val;
789 6455 return 0;
790 }
791
792 typedef struct StreamType {
793 uint32_t stream_type;
794 enum AVMediaType codec_type;
795 enum AVCodecID codec_id;
796 } StreamType;
797
798 static const StreamType ISO_types[] = {
799 { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
800 { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO },
801 { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
802 { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 },
803 { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
804 { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 },
805 /* Makito encoder sets stream type 0x11 for AAC,
806 * so auto-detect LOAS/LATM instead of hardcoding it. */
807 #if !CONFIG_LOAS_DEMUXER
808 { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */
809 #endif
810 { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
811 { 0x1c, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
812 { 0x20, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 },
813 { 0x21, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_JPEG2000 },
814 { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
815 { 0x33, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
816 { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS },
817 { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
818 { 0xd2, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS2 },
819 { 0xd4, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_AVS3 },
820 { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
821 { 0 },
822 };
823
824 static const StreamType HDMV_types[] = {
825 { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY },
826 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
827 { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
828 { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD },
829 { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
830 { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */
831 { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/
832 { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */
833 { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */
834 { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE },
835 { 0x92, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_TEXT_SUBTITLE },
836 { 0 },
837 };
838
839 /* SCTE types */
840 static const StreamType SCTE_types[] = {
841 { 0x86, AVMEDIA_TYPE_DATA, AV_CODEC_ID_SCTE_35 },
842 { 0 },
843 };
844
845 /* ATSC ? */
846 static const StreamType MISC_types[] = {
847 { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
848 { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
849 { 0 },
850 };
851
852 /* HLS Sample Encryption Types */
853 static const StreamType HLS_SAMPLE_ENC_types[] = {
854 { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
855 { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
856 { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
857 { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
858 { 0 },
859 };
860
861 static const StreamType REGD_types[] = {
862 { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC },
863 { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
864 { MKTAG('A', 'C', '-', '4'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC4 },
865 { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M },
866 { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
867 { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
868 { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
869 { MKTAG('E', 'A', 'C', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 },
870 { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC },
871 { MKTAG('V', 'V', 'C', ' '), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VVC },
872 { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
873 { MKTAG('V', 'A', 'N', 'C'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_2038 },
874 { MKTAG('I', 'D', '3', ' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
875 { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 },
876 { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS },
877 { 0 },
878 };
879
880 static const StreamType METADATA_types[] = {
881 { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV },
882 { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 },
883 { 0 },
884 };
885
886 /* descriptor present */
887 static const StreamType DESC_types[] = {
888 { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */
889 { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */
890 { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS },
891 { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT },
892 { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */
893 { 0 },
894 };
895
896 149 static void mpegts_find_stream_type(AVStream *st,
897 uint32_t stream_type,
898 const StreamType *types)
899 {
900 149 FFStream *const sti = ffstream(st);
901
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827 for (; types->stream_type; types++)
902
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780 if (stream_type == types->stream_type) {
903
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102 if (st->codecpar->codec_type != types->codec_type ||
904
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8 st->codecpar->codec_id != types->codec_id) {
905 101 st->codecpar->codec_type = types->codec_type;
906 101 st->codecpar->codec_id = types->codec_id;
907 101 sti->need_context_update = 1;
908 }
909 102 sti->request_probe = 0;
910 102 return;
911 }
912 }
913
914 97 static int mpegts_set_stream_info(AVStream *st, PESContext *pes,
915 uint32_t stream_type, uint32_t prog_reg_desc)
916 {
917 97 FFStream *const sti = ffstream(st);
918 97 int old_codec_type = st->codecpar->codec_type;
919 97 int old_codec_id = st->codecpar->codec_id;
920 97 int old_codec_tag = st->codecpar->codec_tag;
921
922 97 avpriv_set_pts_info(st, 33, 1, 90000);
923 97 st->priv_data = pes;
924 97 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
925 97 st->codecpar->codec_id = AV_CODEC_ID_NONE;
926 97 sti->need_parsing = AVSTREAM_PARSE_FULL;
927 97 pes->st = st;
928 97 pes->stream_type = stream_type;
929
930 97 av_log(pes->stream, AV_LOG_DEBUG,
931 "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n",
932 st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc);
933
934 97 st->codecpar->codec_tag = pes->stream_type;
935
936 97 mpegts_find_stream_type(st, pes->stream_type, ISO_types);
937
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97 if (pes->stream_type == 4 || pes->stream_type == 0x0f)
938 7 sti->request_probe = 50;
939
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97 if ((prog_reg_desc == AV_RL32("HDMV") ||
940
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97 prog_reg_desc == AV_RL32("HDPR")) &&
941 st->codecpar->codec_id == AV_CODEC_ID_NONE) {
942 mpegts_find_stream_type(st, pes->stream_type, HDMV_types);
943 if (pes->stream_type == 0x83) {
944 // HDMV TrueHD streams also contain an AC3 coded version of the
945 // audio track - add a second stream for this
946 AVStream *sub_st;
947 // priv_data cannot be shared between streams
948 PESContext *sub_pes = av_memdup(pes, sizeof(*sub_pes));
949 if (!sub_pes)
950 return AVERROR(ENOMEM);
951
952 sub_st = avformat_new_stream(pes->stream, NULL);
953 if (!sub_st) {
954 av_free(sub_pes);
955 return AVERROR(ENOMEM);
956 }
957
958 sub_st->id = pes->pid;
959 avpriv_set_pts_info(sub_st, 33, 1, 90000);
960 sub_st->priv_data = sub_pes;
961 sub_st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
962 sub_st->codecpar->codec_id = AV_CODEC_ID_AC3;
963 ffstream(sub_st)->need_parsing = AVSTREAM_PARSE_FULL;
964 sub_pes->sub_st = pes->sub_st = sub_st;
965 }
966 }
967
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97 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
968 23 mpegts_find_stream_type(st, pes->stream_type, MISC_types);
969
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97 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
970 8 mpegts_find_stream_type(st, pes->stream_type, HLS_SAMPLE_ENC_types);
971
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97 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
972 8 st->codecpar->codec_id = old_codec_id;
973 8 st->codecpar->codec_type = old_codec_type;
974 }
975
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97 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE ||
976
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89 (sti->request_probe > 0 && sti->request_probe < AVPROBE_SCORE_STREAM_RETRY / 5)) &&
977
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8 sti->probe_packets > 0 &&
978 stream_type == STREAM_TYPE_PRIVATE_DATA) {
979 5 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
980 5 st->codecpar->codec_id = AV_CODEC_ID_BIN_DATA;
981 5 sti->request_probe = AVPROBE_SCORE_STREAM_RETRY / 5;
982 }
983
984 /* queue a context update if properties changed */
985
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97 if (old_codec_type != st->codecpar->codec_type ||
986
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3 old_codec_id != st->codecpar->codec_id ||
987
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3 old_codec_tag != st->codecpar->codec_tag)
988 97 sti->need_context_update = 1;
989
990 97 return 0;
991 }
992
993 56578 static void reset_pes_packet_state(PESContext *pes)
994 {
995 56578 pes->pts = AV_NOPTS_VALUE;
996 56578 pes->dts = AV_NOPTS_VALUE;
997 56578 pes->data_index = 0;
998 56578 pes->flags = 0;
999 56578 av_buffer_unref(&pes->buffer);
1000 56578 }
1001
1002 12 static void new_data_packet(const uint8_t *buffer, int len, AVPacket *pkt)
1003 {
1004 12 av_packet_unref(pkt);
1005 12 pkt->data = (uint8_t *)buffer;
1006 12 pkt->size = len;
1007 12 }
1008
1009 29365 static int new_pes_packet(PESContext *pes, AVPacket *pkt)
1010 {
1011 uint8_t *sd;
1012
1013 29365 av_packet_unref(pkt);
1014
1015 29365 pkt->buf = pes->buffer;
1016 29365 pkt->data = pes->buffer->data;
1017 29365 pkt->size = pes->data_index;
1018
1019
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29365 if (pes->PES_packet_length &&
1020
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26459 pes->pes_header_size + pes->data_index != pes->PES_packet_length +
1021 PES_START_SIZE) {
1022 85 av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n");
1023 85 pes->flags |= AV_PKT_FLAG_CORRUPT;
1024 }
1025 29365 memset(pkt->data + pkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1026
1027 // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID
1028
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29365 if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76)
1029 pkt->stream_index = pes->sub_st->index;
1030 else
1031 29365 pkt->stream_index = pes->st->index;
1032 29365 pkt->pts = pes->pts;
1033 29365 pkt->dts = pes->dts;
1034 /* store position of first TS packet of this PES packet */
1035 29365 pkt->pos = pes->ts_packet_pos;
1036 29365 pkt->flags = pes->flags;
1037
1038 29365 pes->buffer = NULL;
1039 29365 reset_pes_packet_state(pes);
1040
1041 29365 sd = av_packet_new_side_data(pkt, AV_PKT_DATA_MPEGTS_STREAM_ID, 1);
1042
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29365 if (!sd)
1043 return AVERROR(ENOMEM);
1044 29365 *sd = pes->stream_id;
1045
1046 29365 return 0;
1047 }
1048
1049 static uint64_t get_ts64(GetBitContext *gb, int bits)
1050 {
1051 if (get_bits_left(gb) < bits)
1052 return AV_NOPTS_VALUE;
1053 return get_bits64(gb, bits);
1054 }
1055
1056 static int read_sl_header(PESContext *pes, SLConfigDescr *sl,
1057 const uint8_t *buf, int buf_size)
1058 {
1059 GetBitContext gb;
1060 int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0;
1061 int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0;
1062 int dts_flag = -1, cts_flag = -1;
1063 int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE;
1064 uint8_t buf_padded[128 + AV_INPUT_BUFFER_PADDING_SIZE];
1065 int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - AV_INPUT_BUFFER_PADDING_SIZE);
1066
1067 memcpy(buf_padded, buf, buf_padded_size);
1068
1069 init_get_bits(&gb, buf_padded, buf_padded_size * 8);
1070
1071 if (sl->use_au_start)
1072 au_start_flag = get_bits1(&gb);
1073 if (sl->use_au_end)
1074 au_end_flag = get_bits1(&gb);
1075 if (!sl->use_au_start && !sl->use_au_end)
1076 au_start_flag = au_end_flag = 1;
1077 if (sl->ocr_len > 0)
1078 ocr_flag = get_bits1(&gb);
1079 if (sl->use_idle)
1080 idle_flag = get_bits1(&gb);
1081 if (sl->use_padding)
1082 padding_flag = get_bits1(&gb);
1083 if (padding_flag)
1084 padding_bits = get_bits(&gb, 3);
1085
1086 if (!idle_flag && (!padding_flag || padding_bits != 0)) {
1087 if (sl->packet_seq_num_len)
1088 skip_bits_long(&gb, sl->packet_seq_num_len);
1089 if (sl->degr_prior_len)
1090 if (get_bits1(&gb))
1091 skip_bits(&gb, sl->degr_prior_len);
1092 if (ocr_flag)
1093 skip_bits_long(&gb, sl->ocr_len);
1094 if (au_start_flag) {
1095 if (sl->use_rand_acc_pt)
1096 get_bits1(&gb);
1097 if (sl->au_seq_num_len > 0)
1098 skip_bits_long(&gb, sl->au_seq_num_len);
1099 if (sl->use_timestamps) {
1100 dts_flag = get_bits1(&gb);
1101 cts_flag = get_bits1(&gb);
1102 }
1103 }
1104 if (sl->inst_bitrate_len)
1105 inst_bitrate_flag = get_bits1(&gb);
1106 if (dts_flag == 1)
1107 dts = get_ts64(&gb, sl->timestamp_len);
1108 if (cts_flag == 1)
1109 cts = get_ts64(&gb, sl->timestamp_len);
1110 if (sl->au_len > 0)
1111 skip_bits_long(&gb, sl->au_len);
1112 if (inst_bitrate_flag)
1113 skip_bits_long(&gb, sl->inst_bitrate_len);
1114 }
1115
1116 if (dts != AV_NOPTS_VALUE)
1117 pes->dts = dts;
1118 if (cts != AV_NOPTS_VALUE)
1119 pes->pts = cts;
1120
1121 if (sl->timestamp_len && sl->timestamp_res)
1122 avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res);
1123
1124 return (get_bits_count(&gb) + 7) >> 3;
1125 }
1126
1127 29461 static AVBufferRef *buffer_pool_get(MpegTSContext *ts, int size)
1128 {
1129 29461 int index = av_log2(size + AV_INPUT_BUFFER_PADDING_SIZE);
1130
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29461 if (!ts->pools[index]) {
1131
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154 int pool_size = FFMIN(ts->max_packet_size + AV_INPUT_BUFFER_PADDING_SIZE, 2 << index);
1132 154 ts->pools[index] = av_buffer_pool_init(pool_size, NULL);
1133
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154 if (!ts->pools[index])
1134 return NULL;
1135 }
1136 29461 return av_buffer_pool_get(ts->pools[index]);
1137 }
1138
1139 /* return non zero if a packet could be constructed */
1140 367689 static int mpegts_push_data(MpegTSFilter *filter,
1141 const uint8_t *buf, int buf_size, int is_start,
1142 int64_t pos)
1143 {
1144 367689 PESContext *pes = filter->u.pes_filter.opaque;
1145 367689 MpegTSContext *ts = pes->ts;
1146 const uint8_t *p;
1147 int ret, len;
1148
1149
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367689 if (!ts->pkt)
1150 return 0;
1151
1152
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367689 if (is_start) {
1153
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30051 if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) {
1154 2838 ret = new_pes_packet(pes, ts->pkt);
1155
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2838 if (ret < 0)
1156 return ret;
1157 2838 ts->stop_parse = 1;
1158 } else {
1159 27213 reset_pes_packet_state(pes);
1160 }
1161 30051 pes->state = MPEGTS_HEADER;
1162 30051 pes->ts_packet_pos = pos;
1163 }
1164 367689 p = buf;
1165
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1192038 while (buf_size > 0) {
1166
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456660 switch (pes->state) {
1167 30051 case MPEGTS_HEADER:
1168 30051 len = PES_START_SIZE - pes->data_index;
1169
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30051 if (len > buf_size)
1170 2 len = buf_size;
1171 30051 memcpy(pes->header + pes->data_index, p, len);
1172 30051 pes->data_index += len;
1173 30051 p += len;
1174 30051 buf_size -= len;
1175
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30051 if (pes->data_index == PES_START_SIZE) {
1176 /* we got all the PES or section header. We can now
1177 * decide */
1178
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30049 if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
1179
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30042 pes->header[2] == 0x01) {
1180 /* it must be an MPEG-2 PES stream */
1181 30042 pes->stream_id = pes->header[3];
1182 30042 av_log(pes->stream, AV_LOG_TRACE, "pid=%x stream_id=%#x\n", pes->pid, pes->stream_id);
1183
1184
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30042 if ((pes->st && pes->st->discard == AVDISCARD_ALL &&
1185
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581 (!pes->sub_st ||
1186 pes->sub_st->discard == AVDISCARD_ALL)) ||
1187
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29461 pes->stream_id == STREAM_ID_PADDING_STREAM)
1188 581 goto skip;
1189
1190 /* stream not present in PMT */
1191
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29461 if (!pes->st) {
1192 if (ts->skip_changes)
1193 goto skip;
1194 if (ts->merge_pmt_versions)
1195 goto skip; /* wait for PMT to merge new stream */
1196
1197 pes->st = avformat_new_stream(ts->stream, NULL);
1198 if (!pes->st)
1199 return AVERROR(ENOMEM);
1200 pes->st->id = pes->pid;
1201 mpegts_set_stream_info(pes->st, pes, 0, 0);
1202 }
1203
1204 29461 pes->PES_packet_length = AV_RB16(pes->header + 4);
1205 /* NOTE: zero length means the PES size is unbounded */
1206
1207
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29461 if (pes->stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1208
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29461 pes->stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1209
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29461 pes->stream_id != STREAM_ID_ECM_STREAM &&
1210
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29461 pes->stream_id != STREAM_ID_EMM_STREAM &&
1211
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29461 pes->stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1212
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29461 pes->stream_id != STREAM_ID_DSMCC_STREAM &&
1213
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58922 pes->stream_id != STREAM_ID_TYPE_E_STREAM) {
1214 29461 FFStream *const pes_sti = ffstream(pes->st);
1215 29461 pes->state = MPEGTS_PESHEADER;
1216
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29461 if (pes->st->codecpar->codec_id == AV_CODEC_ID_NONE && !pes_sti->request_probe) {
1217 2 av_log(pes->stream, AV_LOG_TRACE,
1218 "pid=%x stream_type=%x probing\n",
1219 pes->pid,
1220 pes->stream_type);
1221 2 pes_sti->request_probe = 1;
1222 }
1223 } else {
1224 pes->pes_header_size = 6;
1225 pes->state = MPEGTS_PAYLOAD;
1226 pes->data_index = 0;
1227 }
1228 } else {
1229 /* otherwise, it should be a table */
1230 /* skip packet */
1231 7 skip:
1232 588 pes->state = MPEGTS_SKIP;
1233 588 continue;
1234 }
1235 }
1236 29463 break;
1237 /**********************************************/
1238 /* PES packing parsing */
1239 29461 case MPEGTS_PESHEADER:
1240 29461 len = PES_HEADER_SIZE - pes->data_index;
1241
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29461 if (len < 0)
1242 return AVERROR_INVALIDDATA;
1243
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29461 if (len > buf_size)
1244 len = buf_size;
1245 29461 memcpy(pes->header + pes->data_index, p, len);
1246 29461 pes->data_index += len;
1247 29461 p += len;
1248 29461 buf_size -= len;
1249
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29461 if (pes->data_index == PES_HEADER_SIZE) {
1250 29461 pes->pes_header_size = pes->header[8] + 9;
1251 29461 pes->state = MPEGTS_PESHEADER_FILL;
1252 }
1253 29461 break;
1254 29461 case MPEGTS_PESHEADER_FILL:
1255 29461 len = pes->pes_header_size - pes->data_index;
1256
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29461 if (len < 0)
1257 return AVERROR_INVALIDDATA;
1258
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29461 if (len > buf_size)
1259 len = buf_size;
1260 29461 memcpy(pes->header + pes->data_index, p, len);
1261 29461 pes->data_index += len;
1262 29461 p += len;
1263 29461 buf_size -= len;
1264
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29461 if (pes->data_index == pes->pes_header_size) {
1265 const uint8_t *r;
1266 unsigned int flags, pes_ext, skip;
1267
1268 29461 flags = pes->header[7];
1269 29461 r = pes->header + 9;
1270 29461 pes->pts = AV_NOPTS_VALUE;
1271 29461 pes->dts = AV_NOPTS_VALUE;
1272
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29461 if ((flags & 0xc0) == 0x80) {
1273 10476 pes->dts = pes->pts = ff_parse_pes_pts(r);
1274 10476 r += 5;
1275
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18985 } else if ((flags & 0xc0) == 0xc0) {
1276 1840 pes->pts = ff_parse_pes_pts(r);
1277 1840 r += 5;
1278 1840 pes->dts = ff_parse_pes_pts(r);
1279 1840 r += 5;
1280 }
1281 29461 pes->extended_stream_id = -1;
1282
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29461 if (flags & 0x01) { /* PES extension */
1283 pes_ext = *r++;
1284 /* Skip PES private data, program packet sequence counter and P-STD buffer */
1285 skip = (pes_ext >> 4) & 0xb;
1286 skip += skip & 0x9;
1287 r += skip;
1288 if ((pes_ext & 0x41) == 0x01 &&
1289 (r + 2) <= (pes->header + pes->pes_header_size)) {
1290 /* PES extension 2 */
1291 if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0)
1292 pes->extended_stream_id = r[1];
1293 }
1294 }
1295
1296 /* we got the full header. We parse it and get the payload */
1297 29461 pes->state = MPEGTS_PAYLOAD;
1298 29461 pes->data_index = 0;
1299
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29461 if (pes->stream_type == 0x12 && buf_size > 0) {
1300 int sl_header_bytes = read_sl_header(pes, &pes->sl, p,
1301 buf_size);
1302 pes->pes_header_size += sl_header_bytes;
1303 p += sl_header_bytes;
1304 buf_size -= sl_header_bytes;
1305 }
1306
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29461 if (pes->st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV && buf_size >= 5) {
1307 /* skip metadata access unit header */
1308 pes->pes_header_size += 5;
1309 p += 5;
1310 buf_size -= 5;
1311 }
1312
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29461 if ( pes->ts->fix_teletext_pts
1313
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29461 && ( pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT
1314
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29461 || pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE)
1315 ) {
1316 253 AVProgram *p = NULL;
1317 253 int pcr_found = 0;
1318
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506 while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) {
1319
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253 if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) {
1320 253 MpegTSFilter *f = pes->ts->pids[p->pcr_pid];
1321
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253 if (f) {
1322 253 AVStream *st = NULL;
1323
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253 if (f->type == MPEGTS_PES) {
1324 253 PESContext *pcrpes = f->u.pes_filter.opaque;
1325
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253 if (pcrpes)
1326 253 st = pcrpes->st;
1327 } else if (f->type == MPEGTS_PCR) {
1328 int i;
1329 for (i = 0; i < p->nb_stream_indexes; i++) {
1330 AVStream *pst = pes->stream->streams[p->stream_index[i]];
1331 if (pst->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1332 st = pst;
1333 }
1334 }
1335
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253 if (f->last_pcr != -1 && !f->discard) {
1336 // teletext packets do not always have correct timestamps,
1337 // the standard says they should be handled after 40.6 ms at most,
1338 // and the pcr error to this packet should be no more than 100 ms.
1339 // TODO: we should interpolate the PCR, not just use the last one
1340 int64_t pcr = f->last_pcr / 300;
1341 pcr_found = 1;
1342 if (st) {
1343 const FFStream *const sti = ffstream(st);
1344 FFStream *const pes_sti = ffstream(pes->st);
1345
1346 pes_sti->pts_wrap_reference = sti->pts_wrap_reference;
1347 pes_sti->pts_wrap_behavior = sti->pts_wrap_behavior;
1348 }
1349 if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) {
1350 pes->pts = pes->dts = pcr;
1351 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1352 pes->dts > pcr + 3654 + 9000) {
1353 pes->pts = pes->dts = pcr + 3654 + 9000;
1354 } else if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE &&
1355 pes->dts > pcr + 10*90000) { //10sec
1356 pes->pts = pes->dts = pcr + 3654 + 9000;
1357 }
1358 break;
1359 }
1360 }
1361 }
1362 }
1363
1364
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253 if (pes->st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT &&
1365 !pcr_found) {
1366 av_log(pes->stream, AV_LOG_VERBOSE,
1367 "Forcing DTS/PTS to be unset for a "
1368 "non-trustworthy PES packet for PID %d as "
1369 "PCR hasn't been received yet.\n",
1370 pes->pid);
1371 pes->dts = pes->pts = AV_NOPTS_VALUE;
1372 }
1373 }
1374 }
1375 29461 break;
1376 351879 case MPEGTS_PAYLOAD:
1377 do {
1378 351879 int max_packet_size = ts->max_packet_size;
1379
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351879 if (pes->PES_packet_length && pes->PES_packet_length + PES_START_SIZE > pes->pes_header_size)
1380 195819 max_packet_size = pes->PES_packet_length + PES_START_SIZE - pes->pes_header_size;
1381
1382
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351879 if (pes->data_index > 0 &&
1383
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322418 pes->data_index + buf_size > max_packet_size) {
1384 ret = new_pes_packet(pes, ts->pkt);
1385 if (ret < 0)
1386 return ret;
1387 pes->PES_packet_length = 0;
1388 max_packet_size = ts->max_packet_size;
1389 ts->stop_parse = 1;
1390
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351879 } else if (pes->data_index == 0 &&
1391 buf_size > max_packet_size) {
1392 // pes packet size is < ts size packet and pes data is padded with 0xff
1393 // not sure if this is legal in ts but see issue #2392
1394 buf_size = max_packet_size;
1395 }
1396
1397
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351879 if (!pes->buffer) {
1398 29461 pes->buffer = buffer_pool_get(ts, max_packet_size);
1399
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29461 if (!pes->buffer)
1400 return AVERROR(ENOMEM);
1401 }
1402
1403 351879 memcpy(pes->buffer->data + pes->data_index, p, buf_size);
1404 351879 pes->data_index += buf_size;
1405 /* emit complete packets with known packet size
1406 * decreases demuxer delay for infrequent packets like subtitles from
1407 * a couple of seconds to milliseconds for properly muxed files. */
1408
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351879 if (!ts->stop_parse && pes->PES_packet_length &&
1409
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195819 pes->pes_header_size + pes->data_index == pes->PES_packet_length + PES_START_SIZE) {
1410 26374 ts->stop_parse = 1;
1411 26374 ret = new_pes_packet(pes, ts->pkt);
1412 26374 pes->state = MPEGTS_SKIP;
1413
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26374 if (ret < 0)
1414 return ret;
1415 }
1416 } while (0);
1417 351879 buf_size = 0;
1418 351879 break;
1419 15808 case MPEGTS_SKIP:
1420 15808 buf_size = 0;
1421 15808 break;
1422 }
1423 }
1424
1425 367689 return 0;
1426 }
1427
1428 118 static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid)
1429 {
1430 MpegTSFilter *tss;
1431 PESContext *pes;
1432
1433 /* if no pid found, then add a pid context */
1434 118 pes = av_mallocz(sizeof(PESContext));
1435
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118 if (!pes)
1436 return 0;
1437 118 pes->ts = ts;
1438 118 pes->stream = ts->stream;
1439 118 pes->pid = pid;
1440 118 pes->pcr_pid = pcr_pid;
1441 118 pes->state = MPEGTS_SKIP;
1442 118 pes->pts = AV_NOPTS_VALUE;
1443 118 pes->dts = AV_NOPTS_VALUE;
1444 118 tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
1445
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118 if (!tss) {
1446 av_free(pes);
1447 return 0;
1448 }
1449 118 return pes;
1450 }
1451
1452 #define MAX_LEVEL 4
1453 typedef struct MP4DescrParseContext {
1454 AVFormatContext *s;
1455 FFIOContext pb;
1456 Mp4Descr *descr;
1457 Mp4Descr *active_descr;
1458 int descr_count;
1459 int max_descr_count;
1460 int level;
1461 int predefined_SLConfigDescriptor_seen;
1462 } MP4DescrParseContext;
1463
1464 static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s,
1465 const uint8_t *buf, unsigned size,
1466 Mp4Descr *descr, int max_descr_count)
1467 {
1468 if (size > (1 << 30))
1469 return AVERROR_INVALIDDATA;
1470
1471 ffio_init_read_context(&d->pb, buf, size);
1472
1473 d->s = s;
1474 d->level = 0;
1475 d->descr_count = 0;
1476 d->descr = descr;
1477 d->active_descr = NULL;
1478 d->max_descr_count = max_descr_count;
1479
1480 return 0;
1481 }
1482
1483 static void update_offsets(AVIOContext *pb, int64_t *off, int *len)
1484 {
1485 int64_t new_off = avio_tell(pb);
1486 (*len) -= new_off - *off;
1487 *off = new_off;
1488 }
1489
1490 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1491 int target_tag);
1492
1493 static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len)
1494 {
1495 while (len > 0) {
1496 int ret = parse_mp4_descr(d, off, len, 0);
1497 if (ret < 0)
1498 return ret;
1499 update_offsets(&d->pb.pub, &off, &len);
1500 }
1501 return 0;
1502 }
1503
1504 static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1505 {
1506 AVIOContext *const pb = &d->pb.pub;
1507 avio_rb16(pb); // ID
1508 avio_r8(pb);
1509 avio_r8(pb);
1510 avio_r8(pb);
1511 avio_r8(pb);
1512 avio_r8(pb);
1513 update_offsets(pb, &off, &len);
1514 return parse_mp4_descr_arr(d, off, len);
1515 }
1516
1517 static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len)
1518 {
1519 int id_flags;
1520 if (len < 2)
1521 return 0;
1522 id_flags = avio_rb16(&d->pb.pub);
1523 if (!(id_flags & 0x0020)) { // URL_Flag
1524 update_offsets(&d->pb.pub, &off, &len);
1525 return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[]
1526 } else {
1527 return 0;
1528 }
1529 }
1530
1531 static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1532 {
1533 AVIOContext *const pb = &d->pb.pub;
1534 int es_id = 0;
1535 int ret = 0;
1536
1537 if (d->descr_count >= d->max_descr_count)
1538 return AVERROR_INVALIDDATA;
1539 ff_mp4_parse_es_descr(pb, &es_id);
1540 d->active_descr = d->descr + (d->descr_count++);
1541
1542 d->active_descr->es_id = es_id;
1543 update_offsets(pb, &off, &len);
1544 if ((ret = parse_mp4_descr(d, off, len, MP4DecConfigDescrTag)) < 0)
1545 return ret;
1546 update_offsets(pb, &off, &len);
1547 if (len > 0)
1548 ret = parse_mp4_descr(d, off, len, MP4SLDescrTag);
1549 d->active_descr = NULL;
1550 return ret;
1551 }
1552
1553 static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off,
1554 int len)
1555 {
1556 Mp4Descr *descr = d->active_descr;
1557 if (!descr)
1558 return AVERROR_INVALIDDATA;
1559 d->active_descr->dec_config_descr = av_malloc(len);
1560 if (!descr->dec_config_descr)
1561 return AVERROR(ENOMEM);
1562 descr->dec_config_descr_len = len;
1563 avio_read(&d->pb.pub, descr->dec_config_descr, len);
1564 return 0;
1565 }
1566
1567 static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len)
1568 {
1569 Mp4Descr *descr = d->active_descr;
1570 AVIOContext *const pb = &d->pb.pub;
1571 int predefined;
1572 if (!descr)
1573 return AVERROR_INVALIDDATA;
1574
1575 #define R8_CHECK_CLIP_MAX(dst, maxv) do { \
1576 descr->sl.dst = avio_r8(pb); \
1577 if (descr->sl.dst > maxv) { \
1578 descr->sl.dst = maxv; \
1579 return AVERROR_INVALIDDATA; \
1580 } \
1581 } while (0)
1582
1583 predefined = avio_r8(pb);
1584 if (!predefined) {
1585 int lengths;
1586 int flags = avio_r8(pb);
1587 descr->sl.use_au_start = !!(flags & 0x80);
1588 descr->sl.use_au_end = !!(flags & 0x40);
1589 descr->sl.use_rand_acc_pt = !!(flags & 0x20);
1590 descr->sl.use_padding = !!(flags & 0x08);
1591 descr->sl.use_timestamps = !!(flags & 0x04);
1592 descr->sl.use_idle = !!(flags & 0x02);
1593 descr->sl.timestamp_res = avio_rb32(pb);
1594 avio_rb32(pb);
1595 R8_CHECK_CLIP_MAX(timestamp_len, 63);
1596 R8_CHECK_CLIP_MAX(ocr_len, 63);
1597 R8_CHECK_CLIP_MAX(au_len, 31);
1598 descr->sl.inst_bitrate_len = avio_r8(pb);
1599 lengths = avio_rb16(pb);
1600 descr->sl.degr_prior_len = lengths >> 12;
1601 descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f;
1602 descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f;
1603 } else if (!d->predefined_SLConfigDescriptor_seen){
1604 avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor");
1605 d->predefined_SLConfigDescriptor_seen = 1;
1606 }
1607 return 0;
1608 }
1609
1610 static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len,
1611 int target_tag)
1612 {
1613 int tag;
1614 AVIOContext *const pb = &d->pb.pub;
1615 int len1 = ff_mp4_read_descr(d->s, pb, &tag);
1616 int ret = 0;
1617
1618 update_offsets(pb, &off, &len);
1619 if (len < 0 || len1 > len || len1 <= 0) {
1620 av_log(d->s, AV_LOG_ERROR,
1621 "Tag %x length violation new length %d bytes remaining %d\n",
1622 tag, len1, len);
1623 return AVERROR_INVALIDDATA;
1624 }
1625
1626 if (d->level++ >= MAX_LEVEL) {
1627 av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n");
1628 ret = AVERROR_INVALIDDATA;
1629 goto done;
1630 }
1631
1632 if (target_tag && tag != target_tag) {
1633 av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag,
1634 target_tag);
1635 ret = AVERROR_INVALIDDATA;
1636 goto done;
1637 }
1638
1639 switch (tag) {
1640 case MP4IODescrTag:
1641 ret = parse_MP4IODescrTag(d, off, len1);
1642 break;
1643 case MP4ODescrTag:
1644 ret = parse_MP4ODescrTag(d, off, len1);
1645 break;
1646 case MP4ESDescrTag:
1647 ret = parse_MP4ESDescrTag(d, off, len1);
1648 break;
1649 case MP4DecConfigDescrTag:
1650 ret = parse_MP4DecConfigDescrTag(d, off, len1);
1651 break;
1652 case MP4SLDescrTag:
1653 ret = parse_MP4SLDescrTag(d, off, len1);
1654 break;
1655 }
1656
1657
1658 done:
1659 d->level--;
1660 avio_seek(pb, off + len1, SEEK_SET);
1661 return ret;
1662 }
1663
1664 static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size,
1665 Mp4Descr *descr, int *descr_count, int max_descr_count)
1666 {
1667 MP4DescrParseContext d;
1668 int ret;
1669
1670 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1671 if (ret < 0)
1672 return ret;
1673
1674 ret = parse_mp4_descr(&d, avio_tell(&d.pb.pub), size, MP4IODescrTag);
1675
1676 *descr_count = d.descr_count;
1677 return ret;
1678 }
1679
1680 static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size,
1681 Mp4Descr *descr, int *descr_count, int max_descr_count)
1682 {
1683 MP4DescrParseContext d;
1684 int ret;
1685
1686 ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count);
1687 if (ret < 0)
1688 return ret;
1689
1690 ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb.pub), size);
1691
1692 *descr_count = d.descr_count;
1693 return ret;
1694 }
1695
1696 static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section,
1697 int section_len)
1698 {
1699 MpegTSContext *ts = filter->u.section_filter.opaque;
1700 MpegTSSectionFilter *tssf = &filter->u.section_filter;
1701 SectionHeader h;
1702 const uint8_t *p, *p_end;
1703 int mp4_descr_count = 0;
1704 Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } };
1705 int i, pid;
1706 AVFormatContext *s = ts->stream;
1707
1708 p_end = section + section_len - 4;
1709 p = section;
1710 if (parse_section_header(&h, &p, p_end) < 0)
1711 return;
1712 if (h.tid != M4OD_TID)
1713 return;
1714 if (skip_identical(&h, tssf))
1715 return;
1716
1717 mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count,
1718 MAX_MP4_DESCR_COUNT);
1719
1720 for (pid = 0; pid < NB_PID_MAX; pid++) {
1721 if (!ts->pids[pid])
1722 continue;
1723 for (i = 0; i < mp4_descr_count; i++) {
1724 PESContext *pes;
1725 AVStream *st;
1726 FFStream *sti;
1727 FFIOContext pb;
1728 if (ts->pids[pid]->es_id != mp4_descr[i].es_id)
1729 continue;
1730 if (ts->pids[pid]->type != MPEGTS_PES) {
1731 av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid);
1732 continue;
1733 }
1734 pes = ts->pids[pid]->u.pes_filter.opaque;
1735 st = pes->st;
1736 if (!st)
1737 continue;
1738 sti = ffstream(st);
1739
1740 pes->sl = mp4_descr[i].sl;
1741
1742 ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1743 mp4_descr[i].dec_config_descr_len);
1744 ff_mp4_read_dec_config_descr(s, st, &pb.pub);
1745 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1746 st->codecpar->extradata_size > 0)
1747 sti->need_parsing = 0;
1748 if (st->codecpar->codec_id == AV_CODEC_ID_H264 &&
1749 st->codecpar->extradata_size > 0)
1750 sti->need_parsing = 0;
1751
1752 st->codecpar->codec_type = avcodec_get_type(st->codecpar->codec_id);
1753 sti->need_context_update = 1;
1754 }
1755 }
1756 for (i = 0; i < mp4_descr_count; i++)
1757 av_free(mp4_descr[i].dec_config_descr);
1758 }
1759
1760 static void scte_data_cb(MpegTSFilter *filter, const uint8_t *section,
1761 int section_len)
1762 {
1763 AVProgram *prg = NULL;
1764 MpegTSContext *ts = filter->u.section_filter.opaque;
1765
1766 int idx = ff_find_stream_index(ts->stream, filter->pid);
1767 if (idx < 0)
1768 return;
1769
1770 /**
1771 * In case we receive an SCTE-35 packet before mpegts context is fully
1772 * initialized.
1773 */
1774 if (!ts->pkt)
1775 return;
1776
1777 new_data_packet(section, section_len, ts->pkt);
1778 ts->pkt->stream_index = idx;
1779 prg = av_find_program_from_stream(ts->stream, NULL, idx);
1780 if (prg && prg->pcr_pid != -1 && prg->discard != AVDISCARD_ALL) {
1781 MpegTSFilter *f = ts->pids[prg->pcr_pid];
1782 if (f && f->last_pcr != -1)
1783 ts->pkt->pts = ts->pkt->dts = f->last_pcr/300;
1784 }
1785 ts->stop_parse = 1;
1786
1787 }
1788
1789 static const uint8_t opus_coupled_stream_cnt[9] = {
1790 1, 0, 1, 1, 2, 2, 2, 3, 3
1791 };
1792
1793 static const uint8_t opus_stream_cnt[9] = {
1794 1, 1, 1, 2, 2, 3, 4, 4, 5,
1795 };
1796
1797 static const uint8_t opus_channel_map[8][8] = {
1798 { 0 },
1799 { 0,1 },
1800 { 0,2,1 },
1801 { 0,1,2,3 },
1802 { 0,4,1,2,3 },
1803 { 0,4,1,2,3,5 },
1804 { 0,4,1,2,3,5,6 },
1805 { 0,6,1,2,3,4,5,7 },
1806 };
1807
1808 845 int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type,
1809 const uint8_t **pp, const uint8_t *desc_list_end,
1810 Mp4Descr *mp4_descr, int mp4_descr_count, int pid,
1811 MpegTSContext *ts)
1812 {
1813 845 FFStream *const sti = ffstream(st);
1814 const uint8_t *desc_end;
1815 int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code;
1816 char language[252];
1817 int i;
1818
1819 845 desc_tag = get8(pp, desc_list_end);
1820
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845 if (desc_tag < 0)
1821 519 return AVERROR_INVALIDDATA;
1822 326 desc_len = get8(pp, desc_list_end);
1823
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326 if (desc_len < 0)
1824 return AVERROR_INVALIDDATA;
1825 326 desc_end = *pp + desc_len;
1826
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326 if (desc_end > desc_list_end)
1827 return AVERROR_INVALIDDATA;
1828
1829 326 av_log(fc, AV_LOG_TRACE, "tag: 0x%02x len=%d\n", desc_tag, desc_len);
1830
1831
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326 if ((st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) &&
1832 stream_type == STREAM_TYPE_PRIVATE_DATA)
1833 12 mpegts_find_stream_type(st, desc_tag, DESC_types);
1834
1835
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326 switch (desc_tag) {
1836 case VIDEO_STREAM_DESCRIPTOR:
1837 if (get8(pp, desc_end) & 0x1) {
1838 st->disposition |= AV_DISPOSITION_STILL_IMAGE;
1839 }
1840 break;
1841 case SL_DESCRIPTOR:
1842 desc_es_id = get16(pp, desc_end);
1843 if (desc_es_id < 0)
1844 break;
1845 if (ts && ts->pids[pid])
1846 ts->pids[pid]->es_id = desc_es_id;
1847 for (i = 0; i < mp4_descr_count; i++)
1848 if (mp4_descr[i].dec_config_descr_len &&
1849 mp4_descr[i].es_id == desc_es_id) {
1850 FFIOContext pb;
1851 ffio_init_read_context(&pb, mp4_descr[i].dec_config_descr,
1852 mp4_descr[i].dec_config_descr_len);
1853 ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1854 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1855 st->codecpar->extradata_size > 0) {
1856 sti->need_parsing = 0;
1857 sti->need_context_update = 1;
1858 }
1859 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4SYSTEMS)
1860 mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1);
1861 }
1862 break;
1863 case FMC_DESCRIPTOR:
1864 if (get16(pp, desc_end) < 0)
1865 break;
1866 if (mp4_descr_count > 0 &&
1867 (st->codecpar->codec_id == AV_CODEC_ID_AAC_LATM ||
1868 (sti->request_probe == 0 && st->codecpar->codec_id == AV_CODEC_ID_NONE) ||
1869 sti->request_probe > 0) &&
1870 mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) {
1871 FFIOContext pb;
1872 ffio_init_read_context(&pb, mp4_descr->dec_config_descr,
1873 mp4_descr->dec_config_descr_len);
1874 ff_mp4_read_dec_config_descr(fc, st, &pb.pub);
1875 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1876 st->codecpar->extradata_size > 0) {
1877 sti->request_probe = sti->need_parsing = 0;
1878 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
1879 sti->need_context_update = 1;
1880 }
1881 }
1882 break;
1883 case 0x56: /* DVB teletext descriptor */
1884 {
1885 uint8_t *extradata = NULL;
1886 int language_count = desc_len / 5, ret;
1887
1888 if (desc_len > 0 && desc_len % 5 != 0)
1889 return AVERROR_INVALIDDATA;
1890
1891 if (language_count > 0) {
1892 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1893 av_assert0(language_count <= sizeof(language) / 4);
1894
1895 if (st->codecpar->extradata == NULL) {
1896 ret = ff_alloc_extradata(st->codecpar, language_count * 2);
1897 if (ret < 0)
1898 return ret;
1899 }
1900
1901 if (st->codecpar->extradata_size < language_count * 2)
1902 return AVERROR_INVALIDDATA;
1903
1904 extradata = st->codecpar->extradata;
1905
1906 for (i = 0; i < language_count; i++) {
1907 language[i * 4 + 0] = get8(pp, desc_end);
1908 language[i * 4 + 1] = get8(pp, desc_end);
1909 language[i * 4 + 2] = get8(pp, desc_end);
1910 language[i * 4 + 3] = ',';
1911
1912 memcpy(extradata, *pp, 2);
1913 extradata += 2;
1914
1915 *pp += 2;
1916 }
1917
1918 language[i * 4 - 1] = 0;
1919 av_dict_set(&st->metadata, "language", language, 0);
1920 sti->need_context_update = 1;
1921 }
1922 }
1923 break;
1924 9 case 0x59: /* subtitling descriptor */
1925 {
1926 /* 8 bytes per DVB subtitle substream data:
1927 * ISO_639_language_code (3 bytes),
1928 * subtitling_type (1 byte),
1929 * composition_page_id (2 bytes),
1930 * ancillary_page_id (2 bytes) */
1931 9 int language_count = desc_len / 8, ret;
1932
1933
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9 if (desc_len > 0 && desc_len % 8 != 0)
1934 return AVERROR_INVALIDDATA;
1935
1936
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9 if (language_count > 1) {
1937 avpriv_request_sample(fc, "DVB subtitles with multiple languages");
1938 }
1939
1940
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9 if (language_count > 0) {
1941 uint8_t *extradata;
1942
1943 /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */
1944
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9 av_assert0(language_count <= sizeof(language) / 4);
1945
1946
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9 if (st->codecpar->extradata == NULL) {
1947 3 ret = ff_alloc_extradata(st->codecpar, language_count * 5);
1948
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3 if (ret < 0)
1949 return ret;
1950 }
1951
1952
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9 if (st->codecpar->extradata_size < language_count * 5)
1953 return AVERROR_INVALIDDATA;
1954
1955 9 extradata = st->codecpar->extradata;
1956
1957
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18 for (i = 0; i < language_count; i++) {
1958 9 language[i * 4 + 0] = get8(pp, desc_end);
1959 9 language[i * 4 + 1] = get8(pp, desc_end);
1960 9 language[i * 4 + 2] = get8(pp, desc_end);
1961 9 language[i * 4 + 3] = ',';
1962
1963 /* hearing impaired subtitles detection using subtitling_type */
1964
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9 switch (*pp[0]) {
1965 case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
1966 case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
1967 case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
1968 case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
1969 case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
1970 case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
1971 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
1972 break;
1973 }
1974
1975 9 extradata[4] = get8(pp, desc_end); /* subtitling_type */
1976 9 memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */
1977 9 extradata += 5;
1978
1979 9 *pp += 4;
1980 }
1981
1982 9 language[i * 4 - 1] = 0;
1983 9 av_dict_set(&st->metadata, "language", language, 0);
1984 9 sti->need_context_update = 1;
1985 }
1986 }
1987 9 break;
1988 204 case ISO_639_LANGUAGE_DESCRIPTOR:
1989
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402 for (i = 0; i + 4 <= desc_len; i += 4) {
1990 198 language[i + 0] = get8(pp, desc_end);
1991 198 language[i + 1] = get8(pp, desc_end);
1992 198 language[i + 2] = get8(pp, desc_end);
1993 198 language[i + 3] = ',';
1994 198 switch (get8(pp, desc_end)) {
1995 case 0x01:
1996 st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS;
1997 break;
1998 case 0x02:
1999 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2000 break;
2001 44 case 0x03:
2002 44 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2003 44 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2004 44 break;
2005 }
2006 }
2007
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204 if (i && language[0]) {
2008 194 language[i - 1] = 0;
2009 /* don't overwrite language, as it may already have been set by
2010 * another, more specific descriptor (e.g. supplementary audio) */
2011 194 av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE);
2012 }
2013 204 break;
2014 8 case REGISTRATION_DESCRIPTOR:
2015 8 st->codecpar->codec_tag = bytestream_get_le32(pp);
2016 8 av_log(fc, AV_LOG_TRACE, "reg_desc=%.4s\n", (char *)&st->codecpar->codec_tag);
2017
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8 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || sti->request_probe > 0) {
2018 3 mpegts_find_stream_type(st, st->codecpar->codec_tag, REGD_types);
2019
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3 if (st->codecpar->codec_tag == MKTAG('B', 'S', 'S', 'D'))
2020 2 sti->request_probe = 50;
2021 }
2022 8 break;
2023 31 case 0x52: /* stream identifier descriptor */
2024 31 sti->stream_identifier = 1 + get8(pp, desc_end);
2025 31 break;
2026 4 case METADATA_DESCRIPTOR:
2027
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4 if (get16(pp, desc_end) == 0xFFFF)
2028 4 *pp += 4;
2029
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4 if (get8(pp, desc_end) == 0xFF) {
2030 4 st->codecpar->codec_tag = bytestream_get_le32(pp);
2031
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4 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2032 1 mpegts_find_stream_type(st, st->codecpar->codec_tag, METADATA_types);
2033 }
2034 4 break;
2035 4 case 0x7f: /* DVB extension descriptor */
2036 4 ext_desc_tag = get8(pp, desc_end);
2037
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4 if (ext_desc_tag < 0)
2038 return AVERROR_INVALIDDATA;
2039
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4 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS &&
2040 ext_desc_tag == 0x80) { /* User defined (provisional Opus) */
2041
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3 if (!st->codecpar->extradata) {
2042 1 st->codecpar->extradata = av_mallocz(sizeof(opus_default_extradata) +
2043 AV_INPUT_BUFFER_PADDING_SIZE);
2044
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1 if (!st->codecpar->extradata)
2045 return AVERROR(ENOMEM);
2046
2047 1 st->codecpar->extradata_size = sizeof(opus_default_extradata);
2048 1 memcpy(st->codecpar->extradata, opus_default_extradata, sizeof(opus_default_extradata));
2049
2050 1 channel_config_code = get8(pp, desc_end);
2051
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1 if (channel_config_code < 0)
2052 return AVERROR_INVALIDDATA;
2053
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1 if (channel_config_code <= 0x8) {
2054
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1 st->codecpar->extradata[9] = channels = channel_config_code ? channel_config_code : 2;
2055 1 AV_WL32(&st->codecpar->extradata[12], 48000);
2056
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1 st->codecpar->extradata[18] = channel_config_code ? (channels > 2) : /* Dual Mono */ 255;
2057 1 st->codecpar->extradata[19] = opus_stream_cnt[channel_config_code];
2058 1 st->codecpar->extradata[20] = opus_coupled_stream_cnt[channel_config_code];
2059 1 memcpy(&st->codecpar->extradata[21], opus_channel_map[channels - 1], channels);
2060
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1 st->codecpar->extradata_size = st->codecpar->extradata[18] ? 21 + channels : 19;
2061 } else {
2062 avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8");
2063 }
2064 1 sti->need_parsing = AVSTREAM_PARSE_FULL;
2065 1 sti->need_context_update = 1;
2066 }
2067 }
2068
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4 if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */
2069 int flags;
2070
2071 if (desc_len < 1)
2072 return AVERROR_INVALIDDATA;
2073 flags = get8(pp, desc_end);
2074
2075 if ((flags & 0x80) == 0) /* mix_type */
2076 st->disposition |= AV_DISPOSITION_DEPENDENT;
2077
2078 switch ((flags >> 2) & 0x1F) { /* editorial_classification */
2079 case 0x01:
2080 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2081 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2082 break;
2083 case 0x02:
2084 st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
2085 break;
2086 case 0x03:
2087 st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
2088 break;
2089 }
2090
2091 if (flags & 0x01) { /* language_code_present */
2092 if (desc_len < 4)
2093 return AVERROR_INVALIDDATA;
2094 language[0] = get8(pp, desc_end);
2095 language[1] = get8(pp, desc_end);
2096 language[2] = get8(pp, desc_end);
2097 language[3] = 0;
2098
2099 /* This language always has to override a possible
2100 * ISO 639 language descriptor language */
2101 if (language[0])
2102 av_dict_set(&st->metadata, "language", language, 0);
2103 }
2104 }
2105 4 break;
2106 6 case 0x6a: /* ac-3_descriptor */
2107 {
2108 6 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2109
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6 if (component_type_flag) {
2110 int component_type = get8(pp, desc_end);
2111 int service_type_mask = 0x38; // 0b00111000
2112 int service_type = ((component_type & service_type_mask) >> 3);
2113 if (service_type == 0x02 /* 0b010 */) {
2114 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2115 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2116 }
2117 }
2118 }
2119 6 break;
2120 case 0x7a: /* enhanced_ac-3_descriptor */
2121 {
2122 int component_type_flag = get8(pp, desc_end) & (1 << 7);
2123 if (component_type_flag) {
2124 int component_type = get8(pp, desc_end);
2125 int service_type_mask = 0x38; // 0b00111000
2126 int service_type = ((component_type & service_type_mask) >> 3);
2127 if (service_type == 0x02 /* 0b010 */) {
2128 st->disposition |= AV_DISPOSITION_DESCRIPTIONS;
2129 av_log(ts ? ts->stream : fc, AV_LOG_DEBUG, "New track disposition for id %u: %u\n", st->id, st->disposition);
2130 }
2131 }
2132 }
2133 break;
2134 case 0xfd: /* ARIB data coding type descriptor */
2135 // STD-B24, fascicle 3, chapter 4 defines private_stream_1
2136 // for captions
2137 if (stream_type == STREAM_TYPE_PRIVATE_DATA) {
2138 // This structure is defined in STD-B10, part 1, listing 5.4 and
2139 // part 2, 6.2.20).
2140 // Listing of data_component_ids is in STD-B10, part 2, Annex J.
2141 // Component tag limits are documented in TR-B14, fascicle 2,
2142 // Vol. 3, Section 2, 4.2.8.1
2143 int actual_component_tag = sti->stream_identifier - 1;
2144 int picked_profile = AV_PROFILE_UNKNOWN;
2145 int data_component_id = get16(pp, desc_end);
2146 if (data_component_id < 0)
2147 return AVERROR_INVALIDDATA;
2148
2149 switch (data_component_id) {
2150 case 0x0008:
2151 // [0x30..0x37] are component tags utilized for
2152 // non-mobile captioning service ("profile A").
2153 if (actual_component_tag >= 0x30 &&
2154 actual_component_tag <= 0x37) {
2155 picked_profile =<