Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * MPEG2 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 "libavutil/buffer.h" | |
23 | #include "libavutil/crc.h" | |
24 | #include "libavutil/intreadwrite.h" | |
25 | #include "libavutil/log.h" | |
26 | #include "libavutil/dict.h" | |
27 | #include "libavutil/mathematics.h" | |
28 | #include "libavutil/opt.h" | |
29 | #include "libavutil/avassert.h" | |
30 | #include "libavcodec/bytestream.h" | |
31 | #include "libavcodec/get_bits.h" | |
f6fa7814 | 32 | #include "libavcodec/opus.h" |
2ba45a60 DM |
33 | #include "avformat.h" |
34 | #include "mpegts.h" | |
35 | #include "internal.h" | |
36 | #include "avio_internal.h" | |
37 | #include "seek.h" | |
38 | #include "mpeg.h" | |
39 | #include "isom.h" | |
40 | ||
41 | /* maximum size in which we look for synchronisation if | |
42 | * synchronisation is lost */ | |
43 | #define MAX_RESYNC_SIZE 65536 | |
44 | ||
45 | #define MAX_PES_PAYLOAD 200 * 1024 | |
46 | ||
47 | #define MAX_MP4_DESCR_COUNT 16 | |
48 | ||
49 | #define MOD_UNLIKELY(modulus, dividend, divisor, prev_dividend) \ | |
50 | do { \ | |
51 | if ((prev_dividend) == 0 || (dividend) - (prev_dividend) != (divisor)) \ | |
52 | (modulus) = (dividend) % (divisor); \ | |
53 | (prev_dividend) = (dividend); \ | |
54 | } while (0) | |
55 | ||
56 | enum MpegTSFilterType { | |
57 | MPEGTS_PES, | |
58 | MPEGTS_SECTION, | |
59 | MPEGTS_PCR, | |
60 | }; | |
61 | ||
62 | typedef struct MpegTSFilter MpegTSFilter; | |
63 | ||
64 | typedef int PESCallback (MpegTSFilter *f, const uint8_t *buf, int len, | |
65 | int is_start, int64_t pos); | |
66 | ||
67 | typedef struct MpegTSPESFilter { | |
68 | PESCallback *pes_cb; | |
69 | void *opaque; | |
70 | } MpegTSPESFilter; | |
71 | ||
72 | typedef void SectionCallback (MpegTSFilter *f, const uint8_t *buf, int len); | |
73 | ||
74 | typedef void SetServiceCallback (void *opaque, int ret); | |
75 | ||
76 | typedef struct MpegTSSectionFilter { | |
77 | int section_index; | |
78 | int section_h_size; | |
79 | uint8_t *section_buf; | |
80 | unsigned int check_crc : 1; | |
81 | unsigned int end_of_section_reached : 1; | |
82 | SectionCallback *section_cb; | |
83 | void *opaque; | |
84 | } MpegTSSectionFilter; | |
85 | ||
86 | struct MpegTSFilter { | |
87 | int pid; | |
88 | int es_id; | |
89 | int last_cc; /* last cc code (-1 if first packet) */ | |
90 | int64_t last_pcr; | |
91 | enum MpegTSFilterType type; | |
92 | union { | |
93 | MpegTSPESFilter pes_filter; | |
94 | MpegTSSectionFilter section_filter; | |
95 | } u; | |
96 | }; | |
97 | ||
98 | #define MAX_PIDS_PER_PROGRAM 64 | |
99 | struct Program { | |
100 | unsigned int id; // program id/service id | |
101 | unsigned int nb_pids; | |
102 | unsigned int pids[MAX_PIDS_PER_PROGRAM]; | |
103 | ||
104 | /** have we found pmt for this program */ | |
105 | int pmt_found; | |
106 | }; | |
107 | ||
108 | struct MpegTSContext { | |
109 | const AVClass *class; | |
110 | /* user data */ | |
111 | AVFormatContext *stream; | |
112 | /** raw packet size, including FEC if present */ | |
113 | int raw_packet_size; | |
114 | ||
115 | int size_stat[3]; | |
116 | int size_stat_count; | |
117 | #define SIZE_STAT_THRESHOLD 10 | |
118 | ||
119 | int64_t pos47_full; | |
120 | ||
121 | /** if true, all pids are analyzed to find streams */ | |
122 | int auto_guess; | |
123 | ||
124 | /** compute exact PCR for each transport stream packet */ | |
125 | int mpeg2ts_compute_pcr; | |
126 | ||
127 | /** fix dvb teletext pts */ | |
128 | int fix_teletext_pts; | |
129 | ||
130 | int64_t cur_pcr; /**< used to estimate the exact PCR */ | |
131 | int pcr_incr; /**< used to estimate the exact PCR */ | |
132 | ||
133 | /* data needed to handle file based ts */ | |
134 | /** stop parsing loop */ | |
135 | int stop_parse; | |
136 | /** packet containing Audio/Video data */ | |
137 | AVPacket *pkt; | |
138 | /** to detect seek */ | |
139 | int64_t last_pos; | |
140 | ||
141 | int skip_changes; | |
142 | int skip_clear; | |
143 | ||
f6fa7814 DM |
144 | int scan_all_pmts; |
145 | ||
2ba45a60 DM |
146 | int resync_size; |
147 | ||
148 | /******************************************/ | |
149 | /* private mpegts data */ | |
150 | /* scan context */ | |
151 | /** structure to keep track of Program->pids mapping */ | |
152 | unsigned int nb_prg; | |
153 | struct Program *prg; | |
154 | ||
155 | int8_t crc_validity[NB_PID_MAX]; | |
156 | /** filters for various streams specified by PMT + for the PAT and PMT */ | |
157 | MpegTSFilter *pids[NB_PID_MAX]; | |
158 | int current_pid; | |
159 | }; | |
160 | ||
161 | #define MPEGTS_OPTIONS \ | |
162 | { "resync_size", "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 } | |
163 | ||
164 | static const AVOption options[] = { | |
165 | MPEGTS_OPTIONS, | |
166 | {"fix_teletext_pts", "Try to fix pts values of dvb teletext streams.", offsetof(MpegTSContext, fix_teletext_pts), AV_OPT_TYPE_INT, | |
167 | {.i64 = 1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, | |
168 | {"ts_packetsize", "Output option carrying the raw packet size.", offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, | |
169 | {.i64 = 0}, 0, 0, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, | |
f6fa7814 DM |
170 | {"scan_all_pmts", "Scan and combine all PMTs", offsetof(MpegTSContext, scan_all_pmts), AV_OPT_TYPE_INT, |
171 | { .i64 = -1}, -1, 1, AV_OPT_FLAG_DECODING_PARAM }, | |
2ba45a60 DM |
172 | {"skip_changes", "Skip changing / adding streams / programs.", offsetof(MpegTSContext, skip_changes), AV_OPT_TYPE_INT, |
173 | {.i64 = 0}, 0, 1, 0 }, | |
174 | {"skip_clear", "Skip clearing programs.", offsetof(MpegTSContext, skip_clear), AV_OPT_TYPE_INT, | |
175 | {.i64 = 0}, 0, 1, 0 }, | |
176 | { NULL }, | |
177 | }; | |
178 | ||
179 | static const AVClass mpegts_class = { | |
180 | .class_name = "mpegts demuxer", | |
181 | .item_name = av_default_item_name, | |
182 | .option = options, | |
183 | .version = LIBAVUTIL_VERSION_INT, | |
184 | }; | |
185 | ||
186 | static const AVOption raw_options[] = { | |
187 | MPEGTS_OPTIONS, | |
188 | { "compute_pcr", "Compute exact PCR for each transport stream packet.", | |
189 | offsetof(MpegTSContext, mpeg2ts_compute_pcr), AV_OPT_TYPE_INT, | |
190 | { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM }, | |
191 | { "ts_packetsize", "Output option carrying the raw packet size.", | |
192 | offsetof(MpegTSContext, raw_packet_size), AV_OPT_TYPE_INT, | |
193 | { .i64 = 0 }, 0, 0, | |
194 | AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY }, | |
195 | { NULL }, | |
196 | }; | |
197 | ||
198 | static const AVClass mpegtsraw_class = { | |
199 | .class_name = "mpegtsraw demuxer", | |
200 | .item_name = av_default_item_name, | |
201 | .option = raw_options, | |
202 | .version = LIBAVUTIL_VERSION_INT, | |
203 | }; | |
204 | ||
205 | /* TS stream handling */ | |
206 | ||
207 | enum MpegTSState { | |
208 | MPEGTS_HEADER = 0, | |
209 | MPEGTS_PESHEADER, | |
210 | MPEGTS_PESHEADER_FILL, | |
211 | MPEGTS_PAYLOAD, | |
212 | MPEGTS_SKIP, | |
213 | }; | |
214 | ||
215 | /* enough for PES header + length */ | |
216 | #define PES_START_SIZE 6 | |
217 | #define PES_HEADER_SIZE 9 | |
218 | #define MAX_PES_HEADER_SIZE (9 + 255) | |
219 | ||
220 | typedef struct PESContext { | |
221 | int pid; | |
222 | int pcr_pid; /**< if -1 then all packets containing PCR are considered */ | |
223 | int stream_type; | |
224 | MpegTSContext *ts; | |
225 | AVFormatContext *stream; | |
226 | AVStream *st; | |
227 | AVStream *sub_st; /**< stream for the embedded AC3 stream in HDMV TrueHD */ | |
228 | enum MpegTSState state; | |
229 | /* used to get the format */ | |
230 | int data_index; | |
231 | int flags; /**< copied to the AVPacket flags */ | |
232 | int total_size; | |
233 | int pes_header_size; | |
234 | int extended_stream_id; | |
235 | int64_t pts, dts; | |
236 | int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */ | |
237 | uint8_t header[MAX_PES_HEADER_SIZE]; | |
238 | AVBufferRef *buffer; | |
239 | SLConfigDescr sl; | |
240 | } PESContext; | |
241 | ||
242 | extern AVInputFormat ff_mpegts_demuxer; | |
243 | ||
244 | static struct Program * get_program(MpegTSContext *ts, unsigned int programid) | |
245 | { | |
246 | int i; | |
247 | for (i = 0; i < ts->nb_prg; i++) { | |
248 | if (ts->prg[i].id == programid) { | |
249 | return &ts->prg[i]; | |
250 | } | |
251 | } | |
252 | return NULL; | |
253 | } | |
254 | ||
255 | static void clear_avprogram(MpegTSContext *ts, unsigned int programid) | |
256 | { | |
257 | AVProgram *prg = NULL; | |
258 | int i; | |
259 | ||
260 | for (i = 0; i < ts->stream->nb_programs; i++) | |
261 | if (ts->stream->programs[i]->id == programid) { | |
262 | prg = ts->stream->programs[i]; | |
263 | break; | |
264 | } | |
265 | if (!prg) | |
266 | return; | |
267 | prg->nb_stream_indexes = 0; | |
268 | } | |
269 | ||
270 | static void clear_program(MpegTSContext *ts, unsigned int programid) | |
271 | { | |
272 | int i; | |
273 | ||
274 | clear_avprogram(ts, programid); | |
275 | for (i = 0; i < ts->nb_prg; i++) | |
276 | if (ts->prg[i].id == programid) { | |
277 | ts->prg[i].nb_pids = 0; | |
278 | ts->prg[i].pmt_found = 0; | |
279 | } | |
280 | } | |
281 | ||
282 | static void clear_programs(MpegTSContext *ts) | |
283 | { | |
284 | av_freep(&ts->prg); | |
285 | ts->nb_prg = 0; | |
286 | } | |
287 | ||
288 | static void add_pat_entry(MpegTSContext *ts, unsigned int programid) | |
289 | { | |
290 | struct Program *p; | |
291 | if (av_reallocp_array(&ts->prg, ts->nb_prg + 1, sizeof(*ts->prg)) < 0) { | |
292 | ts->nb_prg = 0; | |
293 | return; | |
294 | } | |
295 | p = &ts->prg[ts->nb_prg]; | |
296 | p->id = programid; | |
297 | p->nb_pids = 0; | |
298 | p->pmt_found = 0; | |
299 | ts->nb_prg++; | |
300 | } | |
301 | ||
302 | static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, | |
303 | unsigned int pid) | |
304 | { | |
305 | struct Program *p = get_program(ts, programid); | |
f6fa7814 | 306 | int i; |
2ba45a60 DM |
307 | if (!p) |
308 | return; | |
309 | ||
310 | if (p->nb_pids >= MAX_PIDS_PER_PROGRAM) | |
311 | return; | |
f6fa7814 DM |
312 | |
313 | for (i = 0; i < p->nb_pids; i++) | |
314 | if (p->pids[i] == pid) | |
315 | return; | |
316 | ||
2ba45a60 DM |
317 | p->pids[p->nb_pids++] = pid; |
318 | } | |
319 | ||
320 | static void set_pmt_found(MpegTSContext *ts, unsigned int programid) | |
321 | { | |
322 | struct Program *p = get_program(ts, programid); | |
323 | if (!p) | |
324 | return; | |
325 | ||
326 | p->pmt_found = 1; | |
327 | } | |
328 | ||
329 | static void set_pcr_pid(AVFormatContext *s, unsigned int programid, unsigned int pid) | |
330 | { | |
331 | int i; | |
332 | for (i = 0; i < s->nb_programs; i++) { | |
333 | if (s->programs[i]->id == programid) { | |
334 | s->programs[i]->pcr_pid = pid; | |
335 | break; | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | /** | |
341 | * @brief discard_pid() decides if the pid is to be discarded according | |
342 | * to caller's programs selection | |
343 | * @param ts : - TS context | |
344 | * @param pid : - pid | |
345 | * @return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL | |
346 | * 0 otherwise | |
347 | */ | |
348 | static int discard_pid(MpegTSContext *ts, unsigned int pid) | |
349 | { | |
350 | int i, j, k; | |
351 | int used = 0, discarded = 0; | |
352 | struct Program *p; | |
353 | ||
354 | /* If none of the programs have .discard=AVDISCARD_ALL then there's | |
355 | * no way we have to discard this packet */ | |
356 | for (k = 0; k < ts->stream->nb_programs; k++) | |
357 | if (ts->stream->programs[k]->discard == AVDISCARD_ALL) | |
358 | break; | |
359 | if (k == ts->stream->nb_programs) | |
360 | return 0; | |
361 | ||
362 | for (i = 0; i < ts->nb_prg; i++) { | |
363 | p = &ts->prg[i]; | |
364 | for (j = 0; j < p->nb_pids; j++) { | |
365 | if (p->pids[j] != pid) | |
366 | continue; | |
367 | // is program with id p->id set to be discarded? | |
368 | for (k = 0; k < ts->stream->nb_programs; k++) { | |
369 | if (ts->stream->programs[k]->id == p->id) { | |
370 | if (ts->stream->programs[k]->discard == AVDISCARD_ALL) | |
371 | discarded++; | |
372 | else | |
373 | used++; | |
374 | } | |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | return !used && discarded; | |
380 | } | |
381 | ||
382 | /** | |
383 | * Assemble PES packets out of TS packets, and then call the "section_cb" | |
384 | * function when they are complete. | |
385 | */ | |
386 | static void write_section_data(MpegTSContext *ts, MpegTSFilter *tss1, | |
387 | const uint8_t *buf, int buf_size, int is_start) | |
388 | { | |
389 | MpegTSSectionFilter *tss = &tss1->u.section_filter; | |
390 | int len; | |
391 | ||
392 | if (is_start) { | |
393 | memcpy(tss->section_buf, buf, buf_size); | |
394 | tss->section_index = buf_size; | |
395 | tss->section_h_size = -1; | |
396 | tss->end_of_section_reached = 0; | |
397 | } else { | |
398 | if (tss->end_of_section_reached) | |
399 | return; | |
400 | len = 4096 - tss->section_index; | |
401 | if (buf_size < len) | |
402 | len = buf_size; | |
403 | memcpy(tss->section_buf + tss->section_index, buf, len); | |
404 | tss->section_index += len; | |
405 | } | |
406 | ||
407 | /* compute section length if possible */ | |
408 | if (tss->section_h_size == -1 && tss->section_index >= 3) { | |
409 | len = (AV_RB16(tss->section_buf + 1) & 0xfff) + 3; | |
410 | if (len > 4096) | |
411 | return; | |
412 | tss->section_h_size = len; | |
413 | } | |
414 | ||
415 | if (tss->section_h_size != -1 && | |
416 | tss->section_index >= tss->section_h_size) { | |
417 | int crc_valid = 1; | |
418 | tss->end_of_section_reached = 1; | |
419 | ||
420 | if (tss->check_crc) { | |
421 | crc_valid = !av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, tss->section_buf, tss->section_h_size); | |
422 | if (crc_valid) { | |
423 | ts->crc_validity[ tss1->pid ] = 100; | |
424 | }else if (ts->crc_validity[ tss1->pid ] > -10) { | |
425 | ts->crc_validity[ tss1->pid ]--; | |
426 | }else | |
427 | crc_valid = 2; | |
428 | } | |
429 | if (crc_valid) | |
430 | tss->section_cb(tss1, tss->section_buf, tss->section_h_size); | |
431 | } | |
432 | } | |
433 | ||
434 | static MpegTSFilter *mpegts_open_filter(MpegTSContext *ts, unsigned int pid, | |
435 | enum MpegTSFilterType type) | |
436 | { | |
437 | MpegTSFilter *filter; | |
438 | ||
439 | av_dlog(ts->stream, "Filter: pid=0x%x\n", pid); | |
440 | ||
441 | if (pid >= NB_PID_MAX || ts->pids[pid]) | |
442 | return NULL; | |
443 | filter = av_mallocz(sizeof(MpegTSFilter)); | |
444 | if (!filter) | |
445 | return NULL; | |
446 | ts->pids[pid] = filter; | |
447 | ||
448 | filter->type = type; | |
449 | filter->pid = pid; | |
450 | filter->es_id = -1; | |
451 | filter->last_cc = -1; | |
452 | filter->last_pcr= -1; | |
453 | ||
454 | return filter; | |
455 | } | |
456 | ||
457 | static MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, | |
458 | unsigned int pid, | |
459 | SectionCallback *section_cb, | |
460 | void *opaque, | |
461 | int check_crc) | |
462 | { | |
463 | MpegTSFilter *filter; | |
464 | MpegTSSectionFilter *sec; | |
465 | ||
466 | if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_SECTION))) | |
467 | return NULL; | |
468 | sec = &filter->u.section_filter; | |
469 | sec->section_cb = section_cb; | |
470 | sec->opaque = opaque; | |
471 | sec->section_buf = av_malloc(MAX_SECTION_SIZE); | |
472 | sec->check_crc = check_crc; | |
473 | if (!sec->section_buf) { | |
474 | av_free(filter); | |
475 | return NULL; | |
476 | } | |
477 | return filter; | |
478 | } | |
479 | ||
480 | static MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid, | |
481 | PESCallback *pes_cb, | |
482 | void *opaque) | |
483 | { | |
484 | MpegTSFilter *filter; | |
485 | MpegTSPESFilter *pes; | |
486 | ||
487 | if (!(filter = mpegts_open_filter(ts, pid, MPEGTS_PES))) | |
488 | return NULL; | |
489 | ||
490 | pes = &filter->u.pes_filter; | |
491 | pes->pes_cb = pes_cb; | |
492 | pes->opaque = opaque; | |
493 | return filter; | |
494 | } | |
495 | ||
496 | static MpegTSFilter *mpegts_open_pcr_filter(MpegTSContext *ts, unsigned int pid) | |
497 | { | |
498 | return mpegts_open_filter(ts, pid, MPEGTS_PCR); | |
499 | } | |
500 | ||
501 | static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter) | |
502 | { | |
503 | int pid; | |
504 | ||
505 | pid = filter->pid; | |
506 | if (filter->type == MPEGTS_SECTION) | |
507 | av_freep(&filter->u.section_filter.section_buf); | |
508 | else if (filter->type == MPEGTS_PES) { | |
509 | PESContext *pes = filter->u.pes_filter.opaque; | |
510 | av_buffer_unref(&pes->buffer); | |
511 | /* referenced private data will be freed later in | |
512 | * avformat_close_input */ | |
513 | if (!((PESContext *)filter->u.pes_filter.opaque)->st) { | |
514 | av_freep(&filter->u.pes_filter.opaque); | |
515 | } | |
516 | } | |
517 | ||
518 | av_free(filter); | |
519 | ts->pids[pid] = NULL; | |
520 | } | |
521 | ||
522 | static int analyze(const uint8_t *buf, int size, int packet_size, int *index) | |
523 | { | |
524 | int stat[TS_MAX_PACKET_SIZE]; | |
525 | int stat_all = 0; | |
526 | int i; | |
527 | int best_score = 0; | |
528 | ||
529 | memset(stat, 0, packet_size * sizeof(*stat)); | |
530 | ||
531 | for (i = 0; i < size - 3; i++) { | |
532 | if (buf[i] == 0x47 && !(buf[i + 1] & 0x80) && buf[i + 3] != 0x47) { | |
533 | int x = i % packet_size; | |
534 | stat[x]++; | |
535 | stat_all++; | |
536 | if (stat[x] > best_score) { | |
537 | best_score = stat[x]; | |
538 | if (index) | |
539 | *index = x; | |
540 | } | |
541 | } | |
542 | } | |
543 | ||
544 | return best_score - FFMAX(stat_all - 10*best_score, 0)/10; | |
545 | } | |
546 | ||
547 | /* autodetect fec presence. Must have at least 1024 bytes */ | |
548 | static int get_packet_size(const uint8_t *buf, int size) | |
549 | { | |
550 | int score, fec_score, dvhs_score; | |
551 | ||
552 | if (size < (TS_FEC_PACKET_SIZE * 5 + 1)) | |
553 | return AVERROR_INVALIDDATA; | |
554 | ||
555 | score = analyze(buf, size, TS_PACKET_SIZE, NULL); | |
556 | dvhs_score = analyze(buf, size, TS_DVHS_PACKET_SIZE, NULL); | |
557 | fec_score = analyze(buf, size, TS_FEC_PACKET_SIZE, NULL); | |
558 | av_dlog(NULL, "score: %d, dvhs_score: %d, fec_score: %d \n", | |
559 | score, dvhs_score, fec_score); | |
560 | ||
561 | if (score > fec_score && score > dvhs_score) | |
562 | return TS_PACKET_SIZE; | |
563 | else if (dvhs_score > score && dvhs_score > fec_score) | |
564 | return TS_DVHS_PACKET_SIZE; | |
565 | else if (score < fec_score && dvhs_score < fec_score) | |
566 | return TS_FEC_PACKET_SIZE; | |
567 | else | |
568 | return AVERROR_INVALIDDATA; | |
569 | } | |
570 | ||
571 | typedef struct SectionHeader { | |
572 | uint8_t tid; | |
573 | uint16_t id; | |
574 | uint8_t version; | |
575 | uint8_t sec_num; | |
576 | uint8_t last_sec_num; | |
577 | } SectionHeader; | |
578 | ||
579 | static inline int get8(const uint8_t **pp, const uint8_t *p_end) | |
580 | { | |
581 | const uint8_t *p; | |
582 | int c; | |
583 | ||
584 | p = *pp; | |
585 | if (p >= p_end) | |
586 | return AVERROR_INVALIDDATA; | |
587 | c = *p++; | |
588 | *pp = p; | |
589 | return c; | |
590 | } | |
591 | ||
592 | static inline int get16(const uint8_t **pp, const uint8_t *p_end) | |
593 | { | |
594 | const uint8_t *p; | |
595 | int c; | |
596 | ||
597 | p = *pp; | |
598 | if ((p + 1) >= p_end) | |
599 | return AVERROR_INVALIDDATA; | |
600 | c = AV_RB16(p); | |
601 | p += 2; | |
602 | *pp = p; | |
603 | return c; | |
604 | } | |
605 | ||
606 | /* read and allocate a DVB string preceded by its length */ | |
607 | static char *getstr8(const uint8_t **pp, const uint8_t *p_end) | |
608 | { | |
609 | int len; | |
610 | const uint8_t *p; | |
611 | char *str; | |
612 | ||
613 | p = *pp; | |
614 | len = get8(&p, p_end); | |
615 | if (len < 0) | |
616 | return NULL; | |
617 | if ((p + len) > p_end) | |
618 | return NULL; | |
619 | str = av_malloc(len + 1); | |
620 | if (!str) | |
621 | return NULL; | |
622 | memcpy(str, p, len); | |
623 | str[len] = '\0'; | |
624 | p += len; | |
625 | *pp = p; | |
626 | return str; | |
627 | } | |
628 | ||
629 | static int parse_section_header(SectionHeader *h, | |
630 | const uint8_t **pp, const uint8_t *p_end) | |
631 | { | |
632 | int val; | |
633 | ||
634 | val = get8(pp, p_end); | |
635 | if (val < 0) | |
636 | return val; | |
637 | h->tid = val; | |
638 | *pp += 2; | |
639 | val = get16(pp, p_end); | |
640 | if (val < 0) | |
641 | return val; | |
642 | h->id = val; | |
643 | val = get8(pp, p_end); | |
644 | if (val < 0) | |
645 | return val; | |
646 | h->version = (val >> 1) & 0x1f; | |
647 | val = get8(pp, p_end); | |
648 | if (val < 0) | |
649 | return val; | |
650 | h->sec_num = val; | |
651 | val = get8(pp, p_end); | |
652 | if (val < 0) | |
653 | return val; | |
654 | h->last_sec_num = val; | |
655 | return 0; | |
656 | } | |
657 | ||
658 | typedef struct { | |
659 | uint32_t stream_type; | |
660 | enum AVMediaType codec_type; | |
661 | enum AVCodecID codec_id; | |
662 | } StreamType; | |
663 | ||
664 | static const StreamType ISO_types[] = { | |
665 | { 0x01, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO }, | |
666 | { 0x02, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO }, | |
667 | { 0x03, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 }, | |
668 | { 0x04, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3 }, | |
669 | { 0x0f, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC }, | |
670 | { 0x10, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG4 }, | |
671 | /* Makito encoder sets stream type 0x11 for AAC, | |
672 | * so auto-detect LOAS/LATM instead of hardcoding it. */ | |
673 | #if !CONFIG_LOAS_DEMUXER | |
674 | { 0x11, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC_LATM }, /* LATM syntax */ | |
675 | #endif | |
676 | { 0x1b, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264 }, | |
677 | { 0x24, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC }, | |
678 | { 0x42, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_CAVS }, | |
679 | { 0xd1, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC }, | |
680 | { 0xea, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, | |
681 | { 0 }, | |
682 | }; | |
683 | ||
684 | static const StreamType HDMV_types[] = { | |
685 | { 0x80, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_BLURAY }, | |
686 | { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, | |
687 | { 0x82, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
688 | { 0x83, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_TRUEHD }, | |
689 | { 0x84, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, | |
690 | { 0x85, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD */ | |
691 | { 0x86, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS HD MASTER*/ | |
692 | { 0xa1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC3 Secondary Audio */ | |
693 | { 0xa2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, /* DTS Express Secondary Audio */ | |
694 | { 0x90, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_HDMV_PGS_SUBTITLE }, | |
695 | { 0 }, | |
696 | }; | |
697 | ||
698 | /* ATSC ? */ | |
699 | static const StreamType MISC_types[] = { | |
700 | { 0x81, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, | |
701 | { 0x8a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
702 | { 0 }, | |
703 | }; | |
704 | ||
705 | static const StreamType REGD_types[] = { | |
706 | { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC }, | |
707 | { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, | |
708 | { MKTAG('B', 'S', 'S', 'D'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_S302M }, | |
709 | { MKTAG('D', 'T', 'S', '1'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
710 | { MKTAG('D', 'T', 'S', '2'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
711 | { MKTAG('D', 'T', 'S', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
712 | { MKTAG('H', 'E', 'V', 'C'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_HEVC }, | |
713 | { MKTAG('K', 'L', 'V', 'A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV }, | |
714 | { MKTAG('V', 'C', '-', '1'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_VC1 }, | |
f6fa7814 | 715 | { MKTAG('O', 'p', 'u', 's'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_OPUS }, |
2ba45a60 DM |
716 | { 0 }, |
717 | }; | |
718 | ||
719 | static const StreamType METADATA_types[] = { | |
720 | { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA, AV_CODEC_ID_SMPTE_KLV }, | |
721 | { MKTAG('I','D','3',' '), AVMEDIA_TYPE_DATA, AV_CODEC_ID_TIMED_ID3 }, | |
722 | { 0 }, | |
723 | }; | |
724 | ||
725 | /* descriptor present */ | |
726 | static const StreamType DESC_types[] = { | |
727 | { 0x6a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 }, /* AC-3 descriptor */ | |
728 | { 0x7a, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3 }, /* E-AC-3 descriptor */ | |
729 | { 0x7b, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_DTS }, | |
730 | { 0x56, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_TELETEXT }, | |
731 | { 0x59, AVMEDIA_TYPE_SUBTITLE, AV_CODEC_ID_DVB_SUBTITLE }, /* subtitling descriptor */ | |
732 | { 0 }, | |
733 | }; | |
734 | ||
735 | static void mpegts_find_stream_type(AVStream *st, | |
736 | uint32_t stream_type, | |
737 | const StreamType *types) | |
738 | { | |
739 | if (avcodec_is_open(st->codec)) { | |
740 | av_log(NULL, AV_LOG_DEBUG, "cannot set stream info, codec is open\n"); | |
741 | return; | |
742 | } | |
743 | ||
744 | for (; types->stream_type; types++) | |
745 | if (stream_type == types->stream_type) { | |
746 | st->codec->codec_type = types->codec_type; | |
747 | st->codec->codec_id = types->codec_id; | |
748 | st->request_probe = 0; | |
749 | return; | |
750 | } | |
751 | } | |
752 | ||
753 | static int mpegts_set_stream_info(AVStream *st, PESContext *pes, | |
754 | uint32_t stream_type, uint32_t prog_reg_desc) | |
755 | { | |
756 | int old_codec_type = st->codec->codec_type; | |
757 | int old_codec_id = st->codec->codec_id; | |
758 | ||
759 | if (avcodec_is_open(st->codec)) { | |
760 | av_log(pes->stream, AV_LOG_DEBUG, "cannot set stream info, codec is open\n"); | |
761 | return 0; | |
762 | } | |
763 | ||
764 | avpriv_set_pts_info(st, 33, 1, 90000); | |
765 | st->priv_data = pes; | |
766 | st->codec->codec_type = AVMEDIA_TYPE_DATA; | |
767 | st->codec->codec_id = AV_CODEC_ID_NONE; | |
768 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
769 | pes->st = st; | |
770 | pes->stream_type = stream_type; | |
771 | ||
772 | av_log(pes->stream, AV_LOG_DEBUG, | |
773 | "stream=%d stream_type=%x pid=%x prog_reg_desc=%.4s\n", | |
774 | st->index, pes->stream_type, pes->pid, (char *)&prog_reg_desc); | |
775 | ||
776 | st->codec->codec_tag = pes->stream_type; | |
777 | ||
778 | mpegts_find_stream_type(st, pes->stream_type, ISO_types); | |
779 | if ((prog_reg_desc == AV_RL32("HDMV") || | |
780 | prog_reg_desc == AV_RL32("HDPR")) && | |
781 | st->codec->codec_id == AV_CODEC_ID_NONE) { | |
782 | mpegts_find_stream_type(st, pes->stream_type, HDMV_types); | |
783 | if (pes->stream_type == 0x83) { | |
784 | // HDMV TrueHD streams also contain an AC3 coded version of the | |
785 | // audio track - add a second stream for this | |
786 | AVStream *sub_st; | |
787 | // priv_data cannot be shared between streams | |
788 | PESContext *sub_pes = av_malloc(sizeof(*sub_pes)); | |
789 | if (!sub_pes) | |
790 | return AVERROR(ENOMEM); | |
791 | memcpy(sub_pes, pes, sizeof(*sub_pes)); | |
792 | ||
793 | sub_st = avformat_new_stream(pes->stream, NULL); | |
794 | if (!sub_st) { | |
795 | av_free(sub_pes); | |
796 | return AVERROR(ENOMEM); | |
797 | } | |
798 | ||
799 | sub_st->id = pes->pid; | |
800 | avpriv_set_pts_info(sub_st, 33, 1, 90000); | |
801 | sub_st->priv_data = sub_pes; | |
802 | sub_st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
803 | sub_st->codec->codec_id = AV_CODEC_ID_AC3; | |
804 | sub_st->need_parsing = AVSTREAM_PARSE_FULL; | |
805 | sub_pes->sub_st = pes->sub_st = sub_st; | |
806 | } | |
807 | } | |
808 | if (st->codec->codec_id == AV_CODEC_ID_NONE) | |
809 | mpegts_find_stream_type(st, pes->stream_type, MISC_types); | |
810 | if (st->codec->codec_id == AV_CODEC_ID_NONE) { | |
811 | st->codec->codec_id = old_codec_id; | |
812 | st->codec->codec_type = old_codec_type; | |
813 | } | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
818 | static void reset_pes_packet_state(PESContext *pes) | |
819 | { | |
820 | pes->pts = AV_NOPTS_VALUE; | |
821 | pes->dts = AV_NOPTS_VALUE; | |
822 | pes->data_index = 0; | |
823 | pes->flags = 0; | |
824 | av_buffer_unref(&pes->buffer); | |
825 | } | |
826 | ||
827 | static void new_pes_packet(PESContext *pes, AVPacket *pkt) | |
828 | { | |
829 | av_init_packet(pkt); | |
830 | ||
831 | pkt->buf = pes->buffer; | |
832 | pkt->data = pes->buffer->data; | |
833 | pkt->size = pes->data_index; | |
834 | ||
835 | if (pes->total_size != MAX_PES_PAYLOAD && | |
836 | pes->pes_header_size + pes->data_index != pes->total_size + | |
837 | PES_START_SIZE) { | |
838 | av_log(pes->stream, AV_LOG_WARNING, "PES packet size mismatch\n"); | |
839 | pes->flags |= AV_PKT_FLAG_CORRUPT; | |
840 | } | |
841 | memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
842 | ||
843 | // Separate out the AC3 substream from an HDMV combined TrueHD/AC3 PID | |
844 | if (pes->sub_st && pes->stream_type == 0x83 && pes->extended_stream_id == 0x76) | |
845 | pkt->stream_index = pes->sub_st->index; | |
846 | else | |
847 | pkt->stream_index = pes->st->index; | |
848 | pkt->pts = pes->pts; | |
849 | pkt->dts = pes->dts; | |
850 | /* store position of first TS packet of this PES packet */ | |
851 | pkt->pos = pes->ts_packet_pos; | |
852 | pkt->flags = pes->flags; | |
853 | ||
854 | pes->buffer = NULL; | |
855 | reset_pes_packet_state(pes); | |
856 | } | |
857 | ||
858 | static uint64_t get_ts64(GetBitContext *gb, int bits) | |
859 | { | |
860 | if (get_bits_left(gb) < bits) | |
861 | return AV_NOPTS_VALUE; | |
862 | return get_bits64(gb, bits); | |
863 | } | |
864 | ||
865 | static int read_sl_header(PESContext *pes, SLConfigDescr *sl, | |
866 | const uint8_t *buf, int buf_size) | |
867 | { | |
868 | GetBitContext gb; | |
869 | int au_start_flag = 0, au_end_flag = 0, ocr_flag = 0, idle_flag = 0; | |
870 | int padding_flag = 0, padding_bits = 0, inst_bitrate_flag = 0; | |
871 | int dts_flag = -1, cts_flag = -1; | |
872 | int64_t dts = AV_NOPTS_VALUE, cts = AV_NOPTS_VALUE; | |
873 | uint8_t buf_padded[128 + FF_INPUT_BUFFER_PADDING_SIZE]; | |
874 | int buf_padded_size = FFMIN(buf_size, sizeof(buf_padded) - FF_INPUT_BUFFER_PADDING_SIZE); | |
875 | ||
876 | memcpy(buf_padded, buf, buf_padded_size); | |
877 | ||
878 | init_get_bits(&gb, buf_padded, buf_padded_size * 8); | |
879 | ||
880 | if (sl->use_au_start) | |
881 | au_start_flag = get_bits1(&gb); | |
882 | if (sl->use_au_end) | |
883 | au_end_flag = get_bits1(&gb); | |
884 | if (!sl->use_au_start && !sl->use_au_end) | |
885 | au_start_flag = au_end_flag = 1; | |
886 | if (sl->ocr_len > 0) | |
887 | ocr_flag = get_bits1(&gb); | |
888 | if (sl->use_idle) | |
889 | idle_flag = get_bits1(&gb); | |
890 | if (sl->use_padding) | |
891 | padding_flag = get_bits1(&gb); | |
892 | if (padding_flag) | |
893 | padding_bits = get_bits(&gb, 3); | |
894 | ||
895 | if (!idle_flag && (!padding_flag || padding_bits != 0)) { | |
896 | if (sl->packet_seq_num_len) | |
897 | skip_bits_long(&gb, sl->packet_seq_num_len); | |
898 | if (sl->degr_prior_len) | |
899 | if (get_bits1(&gb)) | |
900 | skip_bits(&gb, sl->degr_prior_len); | |
901 | if (ocr_flag) | |
902 | skip_bits_long(&gb, sl->ocr_len); | |
903 | if (au_start_flag) { | |
904 | if (sl->use_rand_acc_pt) | |
905 | get_bits1(&gb); | |
906 | if (sl->au_seq_num_len > 0) | |
907 | skip_bits_long(&gb, sl->au_seq_num_len); | |
908 | if (sl->use_timestamps) { | |
909 | dts_flag = get_bits1(&gb); | |
910 | cts_flag = get_bits1(&gb); | |
911 | } | |
912 | } | |
913 | if (sl->inst_bitrate_len) | |
914 | inst_bitrate_flag = get_bits1(&gb); | |
915 | if (dts_flag == 1) | |
916 | dts = get_ts64(&gb, sl->timestamp_len); | |
917 | if (cts_flag == 1) | |
918 | cts = get_ts64(&gb, sl->timestamp_len); | |
919 | if (sl->au_len > 0) | |
920 | skip_bits_long(&gb, sl->au_len); | |
921 | if (inst_bitrate_flag) | |
922 | skip_bits_long(&gb, sl->inst_bitrate_len); | |
923 | } | |
924 | ||
925 | if (dts != AV_NOPTS_VALUE) | |
926 | pes->dts = dts; | |
927 | if (cts != AV_NOPTS_VALUE) | |
928 | pes->pts = cts; | |
929 | ||
930 | if (sl->timestamp_len && sl->timestamp_res) | |
931 | avpriv_set_pts_info(pes->st, sl->timestamp_len, 1, sl->timestamp_res); | |
932 | ||
933 | return (get_bits_count(&gb) + 7) >> 3; | |
934 | } | |
935 | ||
936 | /* return non zero if a packet could be constructed */ | |
937 | static int mpegts_push_data(MpegTSFilter *filter, | |
938 | const uint8_t *buf, int buf_size, int is_start, | |
939 | int64_t pos) | |
940 | { | |
941 | PESContext *pes = filter->u.pes_filter.opaque; | |
942 | MpegTSContext *ts = pes->ts; | |
943 | const uint8_t *p; | |
944 | int len, code; | |
945 | ||
946 | if (!ts->pkt) | |
947 | return 0; | |
948 | ||
949 | if (is_start) { | |
950 | if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) { | |
951 | new_pes_packet(pes, ts->pkt); | |
952 | ts->stop_parse = 1; | |
953 | } else { | |
954 | reset_pes_packet_state(pes); | |
955 | } | |
956 | pes->state = MPEGTS_HEADER; | |
957 | pes->ts_packet_pos = pos; | |
958 | } | |
959 | p = buf; | |
960 | while (buf_size > 0) { | |
961 | switch (pes->state) { | |
962 | case MPEGTS_HEADER: | |
963 | len = PES_START_SIZE - pes->data_index; | |
964 | if (len > buf_size) | |
965 | len = buf_size; | |
966 | memcpy(pes->header + pes->data_index, p, len); | |
967 | pes->data_index += len; | |
968 | p += len; | |
969 | buf_size -= len; | |
970 | if (pes->data_index == PES_START_SIZE) { | |
971 | /* we got all the PES or section header. We can now | |
972 | * decide */ | |
973 | if (pes->header[0] == 0x00 && pes->header[1] == 0x00 && | |
974 | pes->header[2] == 0x01) { | |
975 | /* it must be an mpeg2 PES stream */ | |
976 | code = pes->header[3] | 0x100; | |
977 | av_dlog(pes->stream, "pid=%x pes_code=%#x\n", pes->pid, | |
978 | code); | |
979 | ||
980 | if ((pes->st && pes->st->discard == AVDISCARD_ALL && | |
981 | (!pes->sub_st || | |
982 | pes->sub_st->discard == AVDISCARD_ALL)) || | |
983 | code == 0x1be) /* padding_stream */ | |
984 | goto skip; | |
985 | ||
986 | /* stream not present in PMT */ | |
987 | if (!pes->st) { | |
988 | if (ts->skip_changes) | |
989 | goto skip; | |
990 | ||
991 | pes->st = avformat_new_stream(ts->stream, NULL); | |
992 | if (!pes->st) | |
993 | return AVERROR(ENOMEM); | |
994 | pes->st->id = pes->pid; | |
995 | mpegts_set_stream_info(pes->st, pes, 0, 0); | |
996 | } | |
997 | ||
998 | pes->total_size = AV_RB16(pes->header + 4); | |
999 | /* NOTE: a zero total size means the PES size is | |
1000 | * unbounded */ | |
1001 | if (!pes->total_size) | |
1002 | pes->total_size = MAX_PES_PAYLOAD; | |
1003 | ||
1004 | /* allocate pes buffer */ | |
1005 | pes->buffer = av_buffer_alloc(pes->total_size + | |
1006 | FF_INPUT_BUFFER_PADDING_SIZE); | |
1007 | if (!pes->buffer) | |
1008 | return AVERROR(ENOMEM); | |
1009 | ||
1010 | if (code != 0x1bc && code != 0x1bf && /* program_stream_map, private_stream_2 */ | |
1011 | code != 0x1f0 && code != 0x1f1 && /* ECM, EMM */ | |
1012 | code != 0x1ff && code != 0x1f2 && /* program_stream_directory, DSMCC_stream */ | |
1013 | code != 0x1f8) { /* ITU-T Rec. H.222.1 type E stream */ | |
1014 | pes->state = MPEGTS_PESHEADER; | |
1015 | if (pes->st->codec->codec_id == AV_CODEC_ID_NONE && !pes->st->request_probe) { | |
1016 | av_dlog(pes->stream, | |
1017 | "pid=%x stream_type=%x probing\n", | |
1018 | pes->pid, | |
1019 | pes->stream_type); | |
1020 | pes->st->request_probe = 1; | |
1021 | } | |
1022 | } else { | |
1023 | pes->state = MPEGTS_PAYLOAD; | |
1024 | pes->data_index = 0; | |
1025 | } | |
1026 | } else { | |
1027 | /* otherwise, it should be a table */ | |
1028 | /* skip packet */ | |
1029 | skip: | |
1030 | pes->state = MPEGTS_SKIP; | |
1031 | continue; | |
1032 | } | |
1033 | } | |
1034 | break; | |
1035 | /**********************************************/ | |
1036 | /* PES packing parsing */ | |
1037 | case MPEGTS_PESHEADER: | |
1038 | len = PES_HEADER_SIZE - pes->data_index; | |
1039 | if (len < 0) | |
1040 | return AVERROR_INVALIDDATA; | |
1041 | if (len > buf_size) | |
1042 | len = buf_size; | |
1043 | memcpy(pes->header + pes->data_index, p, len); | |
1044 | pes->data_index += len; | |
1045 | p += len; | |
1046 | buf_size -= len; | |
1047 | if (pes->data_index == PES_HEADER_SIZE) { | |
1048 | pes->pes_header_size = pes->header[8] + 9; | |
1049 | pes->state = MPEGTS_PESHEADER_FILL; | |
1050 | } | |
1051 | break; | |
1052 | case MPEGTS_PESHEADER_FILL: | |
1053 | len = pes->pes_header_size - pes->data_index; | |
1054 | if (len < 0) | |
1055 | return AVERROR_INVALIDDATA; | |
1056 | if (len > buf_size) | |
1057 | len = buf_size; | |
1058 | memcpy(pes->header + pes->data_index, p, len); | |
1059 | pes->data_index += len; | |
1060 | p += len; | |
1061 | buf_size -= len; | |
1062 | if (pes->data_index == pes->pes_header_size) { | |
1063 | const uint8_t *r; | |
1064 | unsigned int flags, pes_ext, skip; | |
1065 | ||
1066 | flags = pes->header[7]; | |
1067 | r = pes->header + 9; | |
1068 | pes->pts = AV_NOPTS_VALUE; | |
1069 | pes->dts = AV_NOPTS_VALUE; | |
1070 | if ((flags & 0xc0) == 0x80) { | |
1071 | pes->dts = pes->pts = ff_parse_pes_pts(r); | |
1072 | r += 5; | |
1073 | } else if ((flags & 0xc0) == 0xc0) { | |
1074 | pes->pts = ff_parse_pes_pts(r); | |
1075 | r += 5; | |
1076 | pes->dts = ff_parse_pes_pts(r); | |
1077 | r += 5; | |
1078 | } | |
1079 | pes->extended_stream_id = -1; | |
1080 | if (flags & 0x01) { /* PES extension */ | |
1081 | pes_ext = *r++; | |
1082 | /* Skip PES private data, program packet sequence counter and P-STD buffer */ | |
1083 | skip = (pes_ext >> 4) & 0xb; | |
1084 | skip += skip & 0x9; | |
1085 | r += skip; | |
1086 | if ((pes_ext & 0x41) == 0x01 && | |
1087 | (r + 2) <= (pes->header + pes->pes_header_size)) { | |
1088 | /* PES extension 2 */ | |
1089 | if ((r[0] & 0x7f) > 0 && (r[1] & 0x80) == 0) | |
1090 | pes->extended_stream_id = r[1]; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /* we got the full header. We parse it and get the payload */ | |
1095 | pes->state = MPEGTS_PAYLOAD; | |
1096 | pes->data_index = 0; | |
1097 | if (pes->stream_type == 0x12 && buf_size > 0) { | |
1098 | int sl_header_bytes = read_sl_header(pes, &pes->sl, p, | |
1099 | buf_size); | |
1100 | pes->pes_header_size += sl_header_bytes; | |
1101 | p += sl_header_bytes; | |
1102 | buf_size -= sl_header_bytes; | |
1103 | } | |
1104 | if (pes->stream_type == 0x15 && buf_size >= 5) { | |
1105 | /* skip metadata access unit header */ | |
1106 | pes->pes_header_size += 5; | |
1107 | p += 5; | |
1108 | buf_size -= 5; | |
1109 | } | |
1110 | if (pes->ts->fix_teletext_pts && pes->st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) { | |
1111 | AVProgram *p = NULL; | |
1112 | while ((p = av_find_program_from_stream(pes->stream, p, pes->st->index))) { | |
1113 | if (p->pcr_pid != -1 && p->discard != AVDISCARD_ALL) { | |
1114 | MpegTSFilter *f = pes->ts->pids[p->pcr_pid]; | |
1115 | if (f) { | |
1116 | AVStream *st = NULL; | |
1117 | if (f->type == MPEGTS_PES) { | |
1118 | PESContext *pcrpes = f->u.pes_filter.opaque; | |
1119 | if (pcrpes) | |
1120 | st = pcrpes->st; | |
1121 | } else if (f->type == MPEGTS_PCR) { | |
1122 | int i; | |
1123 | for (i = 0; i < p->nb_stream_indexes; i++) { | |
1124 | AVStream *pst = pes->stream->streams[p->stream_index[i]]; | |
1125 | if (pst->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
1126 | st = pst; | |
1127 | } | |
1128 | } | |
1129 | if (f->last_pcr != -1 && st && st->discard != AVDISCARD_ALL) { | |
1130 | // teletext packets do not always have correct timestamps, | |
1131 | // the standard says they should be handled after 40.6 ms at most, | |
1132 | // and the pcr error to this packet should be no more than 100 ms. | |
1133 | // TODO: we should interpolate the PCR, not just use the last one | |
1134 | int64_t pcr = f->last_pcr / 300; | |
1135 | pes->st->pts_wrap_reference = st->pts_wrap_reference; | |
1136 | pes->st->pts_wrap_behavior = st->pts_wrap_behavior; | |
1137 | if (pes->dts == AV_NOPTS_VALUE || pes->dts < pcr) { | |
1138 | pes->pts = pes->dts = pcr; | |
1139 | } else if (pes->dts > pcr + 3654 + 9000) { | |
1140 | pes->pts = pes->dts = pcr + 3654 + 9000; | |
1141 | } | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | } | |
1146 | } | |
1147 | } | |
1148 | } | |
1149 | break; | |
1150 | case MPEGTS_PAYLOAD: | |
1151 | if (pes->buffer) { | |
1152 | if (pes->data_index > 0 && | |
1153 | pes->data_index + buf_size > pes->total_size) { | |
1154 | new_pes_packet(pes, ts->pkt); | |
1155 | pes->total_size = MAX_PES_PAYLOAD; | |
1156 | pes->buffer = av_buffer_alloc(pes->total_size + | |
1157 | FF_INPUT_BUFFER_PADDING_SIZE); | |
1158 | if (!pes->buffer) | |
1159 | return AVERROR(ENOMEM); | |
1160 | ts->stop_parse = 1; | |
1161 | } else if (pes->data_index == 0 && | |
1162 | buf_size > pes->total_size) { | |
1163 | // pes packet size is < ts size packet and pes data is padded with 0xff | |
1164 | // not sure if this is legal in ts but see issue #2392 | |
1165 | buf_size = pes->total_size; | |
1166 | } | |
1167 | memcpy(pes->buffer->data + pes->data_index, p, buf_size); | |
1168 | pes->data_index += buf_size; | |
1169 | /* emit complete packets with known packet size | |
1170 | * decreases demuxer delay for infrequent packets like subtitles from | |
1171 | * a couple of seconds to milliseconds for properly muxed files. | |
1172 | * total_size is the number of bytes following pes_packet_length | |
1173 | * in the pes header, i.e. not counting the first PES_START_SIZE bytes */ | |
1174 | if (!ts->stop_parse && pes->total_size < MAX_PES_PAYLOAD && | |
1175 | pes->pes_header_size + pes->data_index == pes->total_size + PES_START_SIZE) { | |
1176 | ts->stop_parse = 1; | |
1177 | new_pes_packet(pes, ts->pkt); | |
1178 | } | |
1179 | } | |
1180 | buf_size = 0; | |
1181 | break; | |
1182 | case MPEGTS_SKIP: | |
1183 | buf_size = 0; | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static PESContext *add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid) | |
1192 | { | |
1193 | MpegTSFilter *tss; | |
1194 | PESContext *pes; | |
1195 | ||
1196 | /* if no pid found, then add a pid context */ | |
1197 | pes = av_mallocz(sizeof(PESContext)); | |
1198 | if (!pes) | |
1199 | return 0; | |
1200 | pes->ts = ts; | |
1201 | pes->stream = ts->stream; | |
1202 | pes->pid = pid; | |
1203 | pes->pcr_pid = pcr_pid; | |
1204 | pes->state = MPEGTS_SKIP; | |
1205 | pes->pts = AV_NOPTS_VALUE; | |
1206 | pes->dts = AV_NOPTS_VALUE; | |
1207 | tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes); | |
1208 | if (!tss) { | |
1209 | av_free(pes); | |
1210 | return 0; | |
1211 | } | |
1212 | return pes; | |
1213 | } | |
1214 | ||
1215 | #define MAX_LEVEL 4 | |
1216 | typedef struct { | |
1217 | AVFormatContext *s; | |
1218 | AVIOContext pb; | |
1219 | Mp4Descr *descr; | |
1220 | Mp4Descr *active_descr; | |
1221 | int descr_count; | |
1222 | int max_descr_count; | |
1223 | int level; | |
1224 | int predefined_SLConfigDescriptor_seen; | |
1225 | } MP4DescrParseContext; | |
1226 | ||
1227 | static int init_MP4DescrParseContext(MP4DescrParseContext *d, AVFormatContext *s, | |
1228 | const uint8_t *buf, unsigned size, | |
1229 | Mp4Descr *descr, int max_descr_count) | |
1230 | { | |
1231 | int ret; | |
1232 | if (size > (1 << 30)) | |
1233 | return AVERROR_INVALIDDATA; | |
1234 | ||
1235 | if ((ret = ffio_init_context(&d->pb, (unsigned char *)buf, size, 0, | |
1236 | NULL, NULL, NULL, NULL)) < 0) | |
1237 | return ret; | |
1238 | ||
1239 | d->s = s; | |
1240 | d->level = 0; | |
1241 | d->descr_count = 0; | |
1242 | d->descr = descr; | |
1243 | d->active_descr = NULL; | |
1244 | d->max_descr_count = max_descr_count; | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
1249 | static void update_offsets(AVIOContext *pb, int64_t *off, int *len) | |
1250 | { | |
1251 | int64_t new_off = avio_tell(pb); | |
1252 | (*len) -= new_off - *off; | |
1253 | *off = new_off; | |
1254 | } | |
1255 | ||
1256 | static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, | |
1257 | int target_tag); | |
1258 | ||
1259 | static int parse_mp4_descr_arr(MP4DescrParseContext *d, int64_t off, int len) | |
1260 | { | |
1261 | while (len > 0) { | |
1262 | int ret = parse_mp4_descr(d, off, len, 0); | |
1263 | if (ret < 0) | |
1264 | return ret; | |
1265 | update_offsets(&d->pb, &off, &len); | |
1266 | } | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | static int parse_MP4IODescrTag(MP4DescrParseContext *d, int64_t off, int len) | |
1271 | { | |
1272 | avio_rb16(&d->pb); // ID | |
1273 | avio_r8(&d->pb); | |
1274 | avio_r8(&d->pb); | |
1275 | avio_r8(&d->pb); | |
1276 | avio_r8(&d->pb); | |
1277 | avio_r8(&d->pb); | |
1278 | update_offsets(&d->pb, &off, &len); | |
1279 | return parse_mp4_descr_arr(d, off, len); | |
1280 | } | |
1281 | ||
1282 | static int parse_MP4ODescrTag(MP4DescrParseContext *d, int64_t off, int len) | |
1283 | { | |
1284 | int id_flags; | |
1285 | if (len < 2) | |
1286 | return 0; | |
1287 | id_flags = avio_rb16(&d->pb); | |
1288 | if (!(id_flags & 0x0020)) { // URL_Flag | |
1289 | update_offsets(&d->pb, &off, &len); | |
1290 | return parse_mp4_descr_arr(d, off, len); // ES_Descriptor[] | |
1291 | } else { | |
1292 | return 0; | |
1293 | } | |
1294 | } | |
1295 | ||
1296 | static int parse_MP4ESDescrTag(MP4DescrParseContext *d, int64_t off, int len) | |
1297 | { | |
1298 | int es_id = 0; | |
1299 | if (d->descr_count >= d->max_descr_count) | |
1300 | return AVERROR_INVALIDDATA; | |
1301 | ff_mp4_parse_es_descr(&d->pb, &es_id); | |
1302 | d->active_descr = d->descr + (d->descr_count++); | |
1303 | ||
1304 | d->active_descr->es_id = es_id; | |
1305 | update_offsets(&d->pb, &off, &len); | |
1306 | parse_mp4_descr(d, off, len, MP4DecConfigDescrTag); | |
1307 | update_offsets(&d->pb, &off, &len); | |
1308 | if (len > 0) | |
1309 | parse_mp4_descr(d, off, len, MP4SLDescrTag); | |
1310 | d->active_descr = NULL; | |
1311 | return 0; | |
1312 | } | |
1313 | ||
1314 | static int parse_MP4DecConfigDescrTag(MP4DescrParseContext *d, int64_t off, | |
1315 | int len) | |
1316 | { | |
1317 | Mp4Descr *descr = d->active_descr; | |
1318 | if (!descr) | |
1319 | return AVERROR_INVALIDDATA; | |
1320 | d->active_descr->dec_config_descr = av_malloc(len); | |
1321 | if (!descr->dec_config_descr) | |
1322 | return AVERROR(ENOMEM); | |
1323 | descr->dec_config_descr_len = len; | |
1324 | avio_read(&d->pb, descr->dec_config_descr, len); | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | static int parse_MP4SLDescrTag(MP4DescrParseContext *d, int64_t off, int len) | |
1329 | { | |
1330 | Mp4Descr *descr = d->active_descr; | |
1331 | int predefined; | |
1332 | if (!descr) | |
1333 | return AVERROR_INVALIDDATA; | |
1334 | ||
1335 | predefined = avio_r8(&d->pb); | |
1336 | if (!predefined) { | |
1337 | int lengths; | |
1338 | int flags = avio_r8(&d->pb); | |
1339 | descr->sl.use_au_start = !!(flags & 0x80); | |
1340 | descr->sl.use_au_end = !!(flags & 0x40); | |
1341 | descr->sl.use_rand_acc_pt = !!(flags & 0x20); | |
1342 | descr->sl.use_padding = !!(flags & 0x08); | |
1343 | descr->sl.use_timestamps = !!(flags & 0x04); | |
1344 | descr->sl.use_idle = !!(flags & 0x02); | |
1345 | descr->sl.timestamp_res = avio_rb32(&d->pb); | |
1346 | avio_rb32(&d->pb); | |
1347 | descr->sl.timestamp_len = avio_r8(&d->pb); | |
1348 | if (descr->sl.timestamp_len > 64) { | |
1349 | avpriv_request_sample(NULL, "timestamp_len > 64"); | |
1350 | descr->sl.timestamp_len = 64; | |
1351 | return AVERROR_PATCHWELCOME; | |
1352 | } | |
1353 | descr->sl.ocr_len = avio_r8(&d->pb); | |
1354 | descr->sl.au_len = avio_r8(&d->pb); | |
1355 | descr->sl.inst_bitrate_len = avio_r8(&d->pb); | |
1356 | lengths = avio_rb16(&d->pb); | |
1357 | descr->sl.degr_prior_len = lengths >> 12; | |
1358 | descr->sl.au_seq_num_len = (lengths >> 7) & 0x1f; | |
1359 | descr->sl.packet_seq_num_len = (lengths >> 2) & 0x1f; | |
1360 | } else if (!d->predefined_SLConfigDescriptor_seen){ | |
1361 | avpriv_report_missing_feature(d->s, "Predefined SLConfigDescriptor"); | |
1362 | d->predefined_SLConfigDescriptor_seen = 1; | |
1363 | } | |
1364 | return 0; | |
1365 | } | |
1366 | ||
1367 | static int parse_mp4_descr(MP4DescrParseContext *d, int64_t off, int len, | |
1368 | int target_tag) | |
1369 | { | |
1370 | int tag; | |
1371 | int len1 = ff_mp4_read_descr(d->s, &d->pb, &tag); | |
1372 | update_offsets(&d->pb, &off, &len); | |
1373 | if (len < 0 || len1 > len || len1 <= 0) { | |
1374 | av_log(d->s, AV_LOG_ERROR, | |
1375 | "Tag %x length violation new length %d bytes remaining %d\n", | |
1376 | tag, len1, len); | |
1377 | return AVERROR_INVALIDDATA; | |
1378 | } | |
1379 | ||
1380 | if (d->level++ >= MAX_LEVEL) { | |
1381 | av_log(d->s, AV_LOG_ERROR, "Maximum MP4 descriptor level exceeded\n"); | |
1382 | goto done; | |
1383 | } | |
1384 | ||
1385 | if (target_tag && tag != target_tag) { | |
1386 | av_log(d->s, AV_LOG_ERROR, "Found tag %x expected %x\n", tag, | |
1387 | target_tag); | |
1388 | goto done; | |
1389 | } | |
1390 | ||
1391 | switch (tag) { | |
1392 | case MP4IODescrTag: | |
1393 | parse_MP4IODescrTag(d, off, len1); | |
1394 | break; | |
1395 | case MP4ODescrTag: | |
1396 | parse_MP4ODescrTag(d, off, len1); | |
1397 | break; | |
1398 | case MP4ESDescrTag: | |
1399 | parse_MP4ESDescrTag(d, off, len1); | |
1400 | break; | |
1401 | case MP4DecConfigDescrTag: | |
1402 | parse_MP4DecConfigDescrTag(d, off, len1); | |
1403 | break; | |
1404 | case MP4SLDescrTag: | |
1405 | parse_MP4SLDescrTag(d, off, len1); | |
1406 | break; | |
1407 | } | |
1408 | ||
1409 | ||
1410 | done: | |
1411 | d->level--; | |
1412 | avio_seek(&d->pb, off + len1, SEEK_SET); | |
1413 | return 0; | |
1414 | } | |
1415 | ||
1416 | static int mp4_read_iods(AVFormatContext *s, const uint8_t *buf, unsigned size, | |
1417 | Mp4Descr *descr, int *descr_count, int max_descr_count) | |
1418 | { | |
1419 | MP4DescrParseContext d; | |
1420 | int ret; | |
1421 | ||
1422 | ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count); | |
1423 | if (ret < 0) | |
1424 | return ret; | |
1425 | ||
1426 | ret = parse_mp4_descr(&d, avio_tell(&d.pb), size, MP4IODescrTag); | |
1427 | ||
1428 | *descr_count = d.descr_count; | |
1429 | return ret; | |
1430 | } | |
1431 | ||
1432 | static int mp4_read_od(AVFormatContext *s, const uint8_t *buf, unsigned size, | |
1433 | Mp4Descr *descr, int *descr_count, int max_descr_count) | |
1434 | { | |
1435 | MP4DescrParseContext d; | |
1436 | int ret; | |
1437 | ||
1438 | ret = init_MP4DescrParseContext(&d, s, buf, size, descr, max_descr_count); | |
1439 | if (ret < 0) | |
1440 | return ret; | |
1441 | ||
1442 | ret = parse_mp4_descr_arr(&d, avio_tell(&d.pb), size); | |
1443 | ||
1444 | *descr_count = d.descr_count; | |
1445 | return ret; | |
1446 | } | |
1447 | ||
1448 | static void m4sl_cb(MpegTSFilter *filter, const uint8_t *section, | |
1449 | int section_len) | |
1450 | { | |
1451 | MpegTSContext *ts = filter->u.section_filter.opaque; | |
1452 | SectionHeader h; | |
1453 | const uint8_t *p, *p_end; | |
1454 | AVIOContext pb; | |
1455 | int mp4_descr_count = 0; | |
1456 | Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } }; | |
1457 | int i, pid; | |
1458 | AVFormatContext *s = ts->stream; | |
1459 | ||
1460 | p_end = section + section_len - 4; | |
1461 | p = section; | |
1462 | if (parse_section_header(&h, &p, p_end) < 0) | |
1463 | return; | |
1464 | if (h.tid != M4OD_TID) | |
1465 | return; | |
1466 | ||
1467 | mp4_read_od(s, p, (unsigned) (p_end - p), mp4_descr, &mp4_descr_count, | |
1468 | MAX_MP4_DESCR_COUNT); | |
1469 | ||
1470 | for (pid = 0; pid < NB_PID_MAX; pid++) { | |
1471 | if (!ts->pids[pid]) | |
1472 | continue; | |
1473 | for (i = 0; i < mp4_descr_count; i++) { | |
1474 | PESContext *pes; | |
1475 | AVStream *st; | |
1476 | if (ts->pids[pid]->es_id != mp4_descr[i].es_id) | |
1477 | continue; | |
1478 | if (ts->pids[pid]->type != MPEGTS_PES) { | |
1479 | av_log(s, AV_LOG_ERROR, "pid %x is not PES\n", pid); | |
1480 | continue; | |
1481 | } | |
1482 | pes = ts->pids[pid]->u.pes_filter.opaque; | |
1483 | st = pes->st; | |
1484 | if (!st) | |
1485 | continue; | |
1486 | ||
1487 | pes->sl = mp4_descr[i].sl; | |
1488 | ||
1489 | ffio_init_context(&pb, mp4_descr[i].dec_config_descr, | |
1490 | mp4_descr[i].dec_config_descr_len, 0, | |
1491 | NULL, NULL, NULL, NULL); | |
1492 | ff_mp4_read_dec_config_descr(s, st, &pb); | |
1493 | if (st->codec->codec_id == AV_CODEC_ID_AAC && | |
1494 | st->codec->extradata_size > 0) | |
1495 | st->need_parsing = 0; | |
1496 | if (st->codec->codec_id == AV_CODEC_ID_H264 && | |
1497 | st->codec->extradata_size > 0) | |
1498 | st->need_parsing = 0; | |
1499 | ||
1500 | if (st->codec->codec_id <= AV_CODEC_ID_NONE) { | |
1501 | // do nothing | |
1502 | } else if (st->codec->codec_id < AV_CODEC_ID_FIRST_AUDIO) | |
1503 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
1504 | else if (st->codec->codec_id < AV_CODEC_ID_FIRST_SUBTITLE) | |
1505 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
1506 | else if (st->codec->codec_id < AV_CODEC_ID_FIRST_UNKNOWN) | |
1507 | st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE; | |
1508 | } | |
1509 | } | |
1510 | for (i = 0; i < mp4_descr_count; i++) | |
1511 | av_free(mp4_descr[i].dec_config_descr); | |
1512 | } | |
1513 | ||
f6fa7814 DM |
1514 | static const uint8_t opus_coupled_stream_cnt[9] = { |
1515 | 1, 0, 1, 1, 2, 2, 2, 3, 3 | |
1516 | }; | |
1517 | ||
1518 | static const uint8_t opus_channel_map[8][8] = { | |
1519 | { 0 }, | |
1520 | { 0,1 }, | |
1521 | { 0,2,1 }, | |
1522 | { 0,1,2,3 }, | |
1523 | { 0,4,1,2,3 }, | |
1524 | { 0,4,1,2,3,5 }, | |
1525 | { 0,4,1,2,3,5,6 }, | |
1526 | { 0,6,1,2,3,4,5,7 }, | |
1527 | }; | |
1528 | ||
2ba45a60 DM |
1529 | int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type, |
1530 | const uint8_t **pp, const uint8_t *desc_list_end, | |
1531 | Mp4Descr *mp4_descr, int mp4_descr_count, int pid, | |
1532 | MpegTSContext *ts) | |
1533 | { | |
1534 | const uint8_t *desc_end; | |
f6fa7814 | 1535 | int desc_len, desc_tag, desc_es_id, ext_desc_tag, channels, channel_config_code; |
2ba45a60 DM |
1536 | char language[252]; |
1537 | int i; | |
1538 | ||
1539 | desc_tag = get8(pp, desc_list_end); | |
1540 | if (desc_tag < 0) | |
1541 | return AVERROR_INVALIDDATA; | |
1542 | desc_len = get8(pp, desc_list_end); | |
1543 | if (desc_len < 0) | |
1544 | return AVERROR_INVALIDDATA; | |
1545 | desc_end = *pp + desc_len; | |
1546 | if (desc_end > desc_list_end) | |
1547 | return AVERROR_INVALIDDATA; | |
1548 | ||
1549 | av_dlog(fc, "tag: 0x%02x len=%d\n", desc_tag, desc_len); | |
1550 | ||
1551 | if ((st->codec->codec_id == AV_CODEC_ID_NONE || st->request_probe > 0) && | |
1552 | stream_type == STREAM_TYPE_PRIVATE_DATA) | |
1553 | mpegts_find_stream_type(st, desc_tag, DESC_types); | |
1554 | ||
1555 | switch (desc_tag) { | |
1556 | case 0x1E: /* SL descriptor */ | |
1557 | desc_es_id = get16(pp, desc_end); | |
1558 | if (ts && ts->pids[pid]) | |
1559 | ts->pids[pid]->es_id = desc_es_id; | |
1560 | for (i = 0; i < mp4_descr_count; i++) | |
1561 | if (mp4_descr[i].dec_config_descr_len && | |
1562 | mp4_descr[i].es_id == desc_es_id) { | |
1563 | AVIOContext pb; | |
1564 | ffio_init_context(&pb, mp4_descr[i].dec_config_descr, | |
1565 | mp4_descr[i].dec_config_descr_len, 0, | |
1566 | NULL, NULL, NULL, NULL); | |
1567 | ff_mp4_read_dec_config_descr(fc, st, &pb); | |
1568 | if (st->codec->codec_id == AV_CODEC_ID_AAC && | |
1569 | st->codec->extradata_size > 0) | |
1570 | st->need_parsing = 0; | |
1571 | if (st->codec->codec_id == AV_CODEC_ID_MPEG4SYSTEMS) | |
1572 | mpegts_open_section_filter(ts, pid, m4sl_cb, ts, 1); | |
1573 | } | |
1574 | break; | |
1575 | case 0x1F: /* FMC descriptor */ | |
1576 | get16(pp, desc_end); | |
1577 | if (mp4_descr_count > 0 && | |
1578 | (st->codec->codec_id == AV_CODEC_ID_AAC_LATM || st->request_probe > 0) && | |
1579 | mp4_descr->dec_config_descr_len && mp4_descr->es_id == pid) { | |
1580 | AVIOContext pb; | |
1581 | ffio_init_context(&pb, mp4_descr->dec_config_descr, | |
1582 | mp4_descr->dec_config_descr_len, 0, | |
1583 | NULL, NULL, NULL, NULL); | |
1584 | ff_mp4_read_dec_config_descr(fc, st, &pb); | |
1585 | if (st->codec->codec_id == AV_CODEC_ID_AAC && | |
1586 | st->codec->extradata_size > 0) { | |
1587 | st->request_probe = st->need_parsing = 0; | |
1588 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
1589 | } | |
1590 | } | |
1591 | break; | |
1592 | case 0x56: /* DVB teletext descriptor */ | |
1593 | { | |
1594 | uint8_t *extradata = NULL; | |
1595 | int language_count = desc_len / 5; | |
1596 | ||
1597 | if (desc_len > 0 && desc_len % 5 != 0) | |
1598 | return AVERROR_INVALIDDATA; | |
1599 | ||
1600 | if (language_count > 0) { | |
1601 | /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */ | |
1602 | if (language_count > sizeof(language) / 4) { | |
1603 | language_count = sizeof(language) / 4; | |
1604 | } | |
1605 | ||
1606 | if (st->codec->extradata == NULL) { | |
1607 | if (ff_alloc_extradata(st->codec, language_count * 2)) { | |
1608 | return AVERROR(ENOMEM); | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | if (st->codec->extradata_size < language_count * 2) | |
1613 | return AVERROR_INVALIDDATA; | |
1614 | ||
1615 | extradata = st->codec->extradata; | |
1616 | ||
1617 | for (i = 0; i < language_count; i++) { | |
1618 | language[i * 4 + 0] = get8(pp, desc_end); | |
1619 | language[i * 4 + 1] = get8(pp, desc_end); | |
1620 | language[i * 4 + 2] = get8(pp, desc_end); | |
1621 | language[i * 4 + 3] = ','; | |
1622 | ||
1623 | memcpy(extradata, *pp, 2); | |
1624 | extradata += 2; | |
1625 | ||
1626 | *pp += 2; | |
1627 | } | |
1628 | ||
1629 | language[i * 4 - 1] = 0; | |
1630 | av_dict_set(&st->metadata, "language", language, 0); | |
1631 | } | |
1632 | } | |
1633 | break; | |
1634 | case 0x59: /* subtitling descriptor */ | |
1635 | { | |
1636 | /* 8 bytes per DVB subtitle substream data: | |
1637 | * ISO_639_language_code (3 bytes), | |
1638 | * subtitling_type (1 byte), | |
1639 | * composition_page_id (2 bytes), | |
1640 | * ancillary_page_id (2 bytes) */ | |
1641 | int language_count = desc_len / 8; | |
1642 | ||
1643 | if (desc_len > 0 && desc_len % 8 != 0) | |
1644 | return AVERROR_INVALIDDATA; | |
1645 | ||
1646 | if (language_count > 1) { | |
1647 | avpriv_request_sample(fc, "DVB subtitles with multiple languages"); | |
1648 | } | |
1649 | ||
1650 | if (language_count > 0) { | |
1651 | uint8_t *extradata; | |
1652 | ||
1653 | /* 4 bytes per language code (3 bytes) with comma or NUL byte should fit language buffer */ | |
1654 | if (language_count > sizeof(language) / 4) { | |
1655 | language_count = sizeof(language) / 4; | |
1656 | } | |
1657 | ||
1658 | if (st->codec->extradata == NULL) { | |
1659 | if (ff_alloc_extradata(st->codec, language_count * 5)) { | |
1660 | return AVERROR(ENOMEM); | |
1661 | } | |
1662 | } | |
1663 | ||
1664 | if (st->codec->extradata_size < language_count * 5) | |
1665 | return AVERROR_INVALIDDATA; | |
1666 | ||
1667 | extradata = st->codec->extradata; | |
1668 | ||
1669 | for (i = 0; i < language_count; i++) { | |
1670 | language[i * 4 + 0] = get8(pp, desc_end); | |
1671 | language[i * 4 + 1] = get8(pp, desc_end); | |
1672 | language[i * 4 + 2] = get8(pp, desc_end); | |
1673 | language[i * 4 + 3] = ','; | |
1674 | ||
1675 | /* hearing impaired subtitles detection using subtitling_type */ | |
1676 | switch (*pp[0]) { | |
1677 | case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */ | |
1678 | case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */ | |
1679 | case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */ | |
1680 | case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */ | |
1681 | case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */ | |
1682 | case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */ | |
1683 | st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; | |
1684 | break; | |
1685 | } | |
1686 | ||
1687 | extradata[4] = get8(pp, desc_end); /* subtitling_type */ | |
1688 | memcpy(extradata, *pp, 4); /* composition_page_id and ancillary_page_id */ | |
1689 | extradata += 5; | |
1690 | ||
1691 | *pp += 4; | |
1692 | } | |
1693 | ||
1694 | language[i * 4 - 1] = 0; | |
1695 | av_dict_set(&st->metadata, "language", language, 0); | |
1696 | } | |
1697 | } | |
1698 | break; | |
1699 | case 0x0a: /* ISO 639 language descriptor */ | |
1700 | for (i = 0; i + 4 <= desc_len; i += 4) { | |
1701 | language[i + 0] = get8(pp, desc_end); | |
1702 | language[i + 1] = get8(pp, desc_end); | |
1703 | language[i + 2] = get8(pp, desc_end); | |
1704 | language[i + 3] = ','; | |
1705 | switch (get8(pp, desc_end)) { | |
1706 | case 0x01: | |
1707 | st->disposition |= AV_DISPOSITION_CLEAN_EFFECTS; | |
1708 | break; | |
1709 | case 0x02: | |
1710 | st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; | |
1711 | break; | |
1712 | case 0x03: | |
1713 | st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; | |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | if (i && language[0]) { | |
1718 | language[i - 1] = 0; | |
1719 | av_dict_set(&st->metadata, "language", language, 0); | |
1720 | } | |
1721 | break; | |
1722 | case 0x05: /* registration descriptor */ | |
1723 | st->codec->codec_tag = bytestream_get_le32(pp); | |
1724 | av_dlog(fc, "reg_desc=%.4s\n", (char *)&st->codec->codec_tag); | |
1725 | if (st->codec->codec_id == AV_CODEC_ID_NONE) | |
1726 | mpegts_find_stream_type(st, st->codec->codec_tag, REGD_types); | |
1727 | break; | |
1728 | case 0x52: /* stream identifier descriptor */ | |
1729 | st->stream_identifier = 1 + get8(pp, desc_end); | |
1730 | break; | |
1731 | case 0x26: /* metadata descriptor */ | |
1732 | if (get16(pp, desc_end) == 0xFFFF) | |
1733 | *pp += 4; | |
1734 | if (get8(pp, desc_end) == 0xFF) { | |
1735 | st->codec->codec_tag = bytestream_get_le32(pp); | |
1736 | if (st->codec->codec_id == AV_CODEC_ID_NONE) | |
1737 | mpegts_find_stream_type(st, st->codec->codec_tag, METADATA_types); | |
1738 | } | |
1739 | break; | |
f6fa7814 DM |
1740 | case 0x7f: /* DVB extension descriptor */ |
1741 | ext_desc_tag = get8(pp, desc_end); | |
1742 | if (ext_desc_tag < 0) | |
1743 | return AVERROR_INVALIDDATA; | |
1744 | if (st->codec->codec_id == AV_CODEC_ID_OPUS && | |
1745 | ext_desc_tag == 0x80) { /* User defined (provisional Opus) */ | |
1746 | if (!st->codec->extradata) { | |
1747 | st->codec->extradata = av_mallocz(sizeof(opus_default_extradata) + | |
1748 | FF_INPUT_BUFFER_PADDING_SIZE); | |
1749 | if (!st->codec->extradata) | |
1750 | return AVERROR(ENOMEM); | |
1751 | ||
1752 | st->codec->extradata_size = sizeof(opus_default_extradata); | |
1753 | memcpy(st->codec->extradata, opus_default_extradata, sizeof(opus_default_extradata)); | |
1754 | ||
1755 | channel_config_code = get8(pp, desc_end); | |
1756 | if (channel_config_code < 0) | |
1757 | return AVERROR_INVALIDDATA; | |
1758 | if (channel_config_code <= 0x8) { | |
1759 | st->codec->extradata[9] = channels = channel_config_code ? channel_config_code : 2; | |
1760 | st->codec->extradata[18] = channels > 2; | |
1761 | st->codec->extradata[19] = channel_config_code; | |
1762 | if (channel_config_code == 0) { /* Dual Mono */ | |
1763 | st->codec->extradata[18] = 255; /* Mapping */ | |
1764 | st->codec->extradata[19] = 2; /* Stream Count */ | |
1765 | } | |
1766 | st->codec->extradata[20] = opus_coupled_stream_cnt[channel_config_code]; | |
1767 | memcpy(&st->codec->extradata[21], opus_channel_map[channels - 1], channels); | |
1768 | } else { | |
1769 | avpriv_request_sample(fc, "Opus in MPEG-TS - channel_config_code > 0x8"); | |
1770 | } | |
1771 | st->need_parsing = AVSTREAM_PARSE_FULL; | |
1772 | } | |
1773 | } | |
1774 | break; | |
2ba45a60 DM |
1775 | default: |
1776 | break; | |
1777 | } | |
1778 | *pp = desc_end; | |
1779 | return 0; | |
1780 | } | |
1781 | ||
1782 | static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) | |
1783 | { | |
1784 | MpegTSContext *ts = filter->u.section_filter.opaque; | |
1785 | SectionHeader h1, *h = &h1; | |
1786 | PESContext *pes; | |
1787 | AVStream *st; | |
1788 | const uint8_t *p, *p_end, *desc_list_end; | |
1789 | int program_info_length, pcr_pid, pid, stream_type; | |
1790 | int desc_list_len; | |
1791 | uint32_t prog_reg_desc = 0; /* registration descriptor */ | |
1792 | ||
1793 | int mp4_descr_count = 0; | |
1794 | Mp4Descr mp4_descr[MAX_MP4_DESCR_COUNT] = { { 0 } }; | |
1795 | int i; | |
1796 | ||
1797 | av_dlog(ts->stream, "PMT: len %i\n", section_len); | |
1798 | hex_dump_debug(ts->stream, section, section_len); | |
1799 | ||
1800 | p_end = section + section_len - 4; | |
1801 | p = section; | |
1802 | if (parse_section_header(h, &p, p_end) < 0) | |
1803 | return; | |
1804 | ||
f6fa7814 DM |
1805 | av_dlog(ts->stream, "sid=0x%x sec_num=%d/%d version=%d\n", |
1806 | h->id, h->sec_num, h->last_sec_num, h->version); | |
2ba45a60 DM |
1807 | |
1808 | if (h->tid != PMT_TID) | |
1809 | return; | |
f6fa7814 | 1810 | if (!ts->scan_all_pmts && ts->skip_changes) |
2ba45a60 DM |
1811 | return; |
1812 | ||
f6fa7814 DM |
1813 | if (!ts->skip_clear) |
1814 | clear_program(ts, h->id); | |
1815 | ||
2ba45a60 DM |
1816 | pcr_pid = get16(&p, p_end); |
1817 | if (pcr_pid < 0) | |
1818 | return; | |
1819 | pcr_pid &= 0x1fff; | |
1820 | add_pid_to_pmt(ts, h->id, pcr_pid); | |
1821 | set_pcr_pid(ts->stream, h->id, pcr_pid); | |
1822 | ||
1823 | av_dlog(ts->stream, "pcr_pid=0x%x\n", pcr_pid); | |
1824 | ||
1825 | program_info_length = get16(&p, p_end); | |
1826 | if (program_info_length < 0) | |
1827 | return; | |
1828 | program_info_length &= 0xfff; | |
1829 | while (program_info_length >= 2) { | |
1830 | uint8_t tag, len; | |
1831 | tag = get8(&p, p_end); | |
1832 | len = get8(&p, p_end); | |
1833 | ||
1834 | av_dlog(ts->stream, "program tag: 0x%02x len=%d\n", tag, len); | |
1835 | ||
1836 | if (len > program_info_length - 2) | |
1837 | // something else is broken, exit the program_descriptors_loop | |
1838 | break; | |
1839 | program_info_length -= len + 2; | |
1840 | if (tag == 0x1d) { // IOD descriptor | |
1841 | get8(&p, p_end); // scope | |
1842 | get8(&p, p_end); // label | |
1843 | len -= 2; | |
1844 | mp4_read_iods(ts->stream, p, len, mp4_descr + mp4_descr_count, | |
1845 | &mp4_descr_count, MAX_MP4_DESCR_COUNT); | |
1846 | } else if (tag == 0x05 && len >= 4) { // registration descriptor | |
1847 | prog_reg_desc = bytestream_get_le32(&p); | |
1848 | len -= 4; | |
1849 | } | |
1850 | p += len; | |
1851 | } | |
1852 | p += program_info_length; | |
1853 | if (p >= p_end) | |
1854 | goto out; | |
1855 | ||
1856 | // stop parsing after pmt, we found header | |
1857 | if (!ts->stream->nb_streams) | |
1858 | ts->stop_parse = 2; | |
1859 | ||
1860 | set_pmt_found(ts, h->id); | |
1861 | ||
1862 | ||
1863 | for (;;) { | |
1864 | st = 0; | |
1865 | pes = NULL; | |
1866 | stream_type = get8(&p, p_end); | |
1867 | if (stream_type < 0) | |
1868 | break; | |
1869 | pid = get16(&p, p_end); | |
1870 | if (pid < 0) | |
1871 | goto out; | |
1872 | pid &= 0x1fff; | |
1873 | if (pid == ts->current_pid) | |
1874 | goto out; | |
1875 | ||
1876 | /* now create stream */ | |
1877 | if (ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES) { | |
1878 | pes = ts->pids[pid]->u.pes_filter.opaque; | |
1879 | if (!pes->st) { | |
1880 | pes->st = avformat_new_stream(pes->stream, NULL); | |
1881 | if (!pes->st) | |
1882 | goto out; | |
1883 | pes->st->id = pes->pid; | |
1884 | } | |
1885 | st = pes->st; | |
1886 | } else if (stream_type != 0x13) { | |
1887 | if (ts->pids[pid]) | |
1888 | mpegts_close_filter(ts, ts->pids[pid]); // wrongly added sdt filter probably | |
1889 | pes = add_pes_stream(ts, pid, pcr_pid); | |
1890 | if (pes) { | |
1891 | st = avformat_new_stream(pes->stream, NULL); | |
1892 | if (!st) | |
1893 | goto out; | |
1894 | st->id = pes->pid; | |
1895 | } | |
1896 | } else { | |
1897 | int idx = ff_find_stream_index(ts->stream, pid); | |
1898 | if (idx >= 0) { | |
1899 | st = ts->stream->streams[idx]; | |
1900 | } else { | |
1901 | st = avformat_new_stream(ts->stream, NULL); | |
1902 | if (!st) | |
1903 | goto out; | |
1904 | st->id = pid; | |
1905 | st->codec->codec_type = AVMEDIA_TYPE_DATA; | |
1906 | } | |
1907 | } | |
1908 | ||
1909 | if (!st) | |
1910 | goto out; | |
1911 | ||
1912 | if (pes && !pes->stream_type) | |
1913 | mpegts_set_stream_info(st, pes, stream_type, prog_reg_desc); | |
1914 | ||
1915 | add_pid_to_pmt(ts, h->id, pid); | |
1916 | ||
1917 | ff_program_add_stream_index(ts->stream, h->id, st->index); | |
1918 | ||
1919 | desc_list_len = get16(&p, p_end); | |
1920 | if (desc_list_len < 0) | |
1921 | goto out; | |
1922 | desc_list_len &= 0xfff; | |
1923 | desc_list_end = p + desc_list_len; | |
1924 | if (desc_list_end > p_end) | |
1925 | goto out; | |
1926 | for (;;) { | |
1927 | if (ff_parse_mpeg2_descriptor(ts->stream, st, stream_type, &p, | |
1928 | desc_list_end, mp4_descr, | |
1929 | mp4_descr_count, pid, ts) < 0) | |
1930 | break; | |
1931 | ||
1932 | if (pes && prog_reg_desc == AV_RL32("HDMV") && | |
1933 | stream_type == 0x83 && pes->sub_st) { | |
1934 | ff_program_add_stream_index(ts->stream, h->id, | |
1935 | pes->sub_st->index); | |
1936 | pes->sub_st->codec->codec_tag = st->codec->codec_tag; | |
1937 | } | |
1938 | } | |
1939 | p = desc_list_end; | |
1940 | } | |
1941 | ||
1942 | if (!ts->pids[pcr_pid]) | |
1943 | mpegts_open_pcr_filter(ts, pcr_pid); | |
1944 | ||
1945 | out: | |
1946 | for (i = 0; i < mp4_descr_count; i++) | |
1947 | av_free(mp4_descr[i].dec_config_descr); | |
1948 | } | |
1949 | ||
1950 | static void pat_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) | |
1951 | { | |
1952 | MpegTSContext *ts = filter->u.section_filter.opaque; | |
1953 | SectionHeader h1, *h = &h1; | |
1954 | const uint8_t *p, *p_end; | |
1955 | int sid, pmt_pid; | |
1956 | AVProgram *program; | |
1957 | ||
1958 | av_dlog(ts->stream, "PAT:\n"); | |
1959 | hex_dump_debug(ts->stream, section, section_len); | |
1960 | ||
1961 | p_end = section + section_len - 4; | |
1962 | p = section; | |
1963 | if (parse_section_header(h, &p, p_end) < 0) | |
1964 | return; | |
1965 | if (h->tid != PAT_TID) | |
1966 | return; | |
1967 | if (ts->skip_changes) | |
1968 | return; | |
1969 | ||
1970 | ts->stream->ts_id = h->id; | |
1971 | ||
1972 | clear_programs(ts); | |
1973 | for (;;) { | |
1974 | sid = get16(&p, p_end); | |
1975 | if (sid < 0) | |
1976 | break; | |
1977 | pmt_pid = get16(&p, p_end); | |
1978 | if (pmt_pid < 0) | |
1979 | break; | |
1980 | pmt_pid &= 0x1fff; | |
1981 | ||
1982 | if (pmt_pid == ts->current_pid) | |
1983 | break; | |
1984 | ||
1985 | av_dlog(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid); | |
1986 | ||
1987 | if (sid == 0x0000) { | |
1988 | /* NIT info */ | |
1989 | } else { | |
1990 | MpegTSFilter *fil = ts->pids[pmt_pid]; | |
1991 | program = av_new_program(ts->stream, sid); | |
f6fa7814 DM |
1992 | if (program) { |
1993 | program->program_num = sid; | |
1994 | program->pmt_pid = pmt_pid; | |
1995 | } | |
2ba45a60 DM |
1996 | if (fil) |
1997 | if ( fil->type != MPEGTS_SECTION | |
1998 | || fil->pid != pmt_pid | |
1999 | || fil->u.section_filter.section_cb != pmt_cb) | |
2000 | mpegts_close_filter(ts, ts->pids[pmt_pid]); | |
2001 | ||
2002 | if (!ts->pids[pmt_pid]) | |
2003 | mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1); | |
2004 | add_pat_entry(ts, sid); | |
2005 | add_pid_to_pmt(ts, sid, 0); // add pat pid to program | |
2006 | add_pid_to_pmt(ts, sid, pmt_pid); | |
2007 | } | |
2008 | } | |
2009 | ||
2010 | if (sid < 0) { | |
2011 | int i,j; | |
2012 | for (j=0; j<ts->stream->nb_programs; j++) { | |
2013 | for (i = 0; i < ts->nb_prg; i++) | |
2014 | if (ts->prg[i].id == ts->stream->programs[j]->id) | |
2015 | break; | |
2016 | if (i==ts->nb_prg && !ts->skip_clear) | |
2017 | clear_avprogram(ts, ts->stream->programs[j]->id); | |
2018 | } | |
2019 | } | |
2020 | } | |
2021 | ||
2022 | static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len) | |
2023 | { | |
2024 | MpegTSContext *ts = filter->u.section_filter.opaque; | |
2025 | SectionHeader h1, *h = &h1; | |
2026 | const uint8_t *p, *p_end, *desc_list_end, *desc_end; | |
2027 | int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type; | |
2028 | char *name, *provider_name; | |
2029 | ||
2030 | av_dlog(ts->stream, "SDT:\n"); | |
2031 | hex_dump_debug(ts->stream, section, section_len); | |
2032 | ||
2033 | p_end = section + section_len - 4; | |
2034 | p = section; | |
2035 | if (parse_section_header(h, &p, p_end) < 0) | |
2036 | return; | |
2037 | if (h->tid != SDT_TID) | |
2038 | return; | |
2039 | if (ts->skip_changes) | |
2040 | return; | |
2041 | onid = get16(&p, p_end); | |
2042 | if (onid < 0) | |
2043 | return; | |
2044 | val = get8(&p, p_end); | |
2045 | if (val < 0) | |
2046 | return; | |
2047 | for (;;) { | |
2048 | sid = get16(&p, p_end); | |
2049 | if (sid < 0) | |
2050 | break; | |
2051 | val = get8(&p, p_end); | |
2052 | if (val < 0) | |
2053 | break; | |
2054 | desc_list_len = get16(&p, p_end); | |
2055 | if (desc_list_len < 0) | |
2056 | break; | |
2057 | desc_list_len &= 0xfff; | |
2058 | desc_list_end = p + desc_list_len; | |
2059 | if (desc_list_end > p_end) | |
2060 | break; | |
2061 | for (;;) { | |
2062 | desc_tag = get8(&p, desc_list_end); | |
2063 | if (desc_tag < 0) | |
2064 | break; | |
2065 | desc_len = get8(&p, desc_list_end); | |
2066 | desc_end = p + desc_len; | |
2067 | if (desc_len < 0 || desc_end > desc_list_end) | |
2068 | break; | |
2069 | ||
2070 | av_dlog(ts->stream, "tag: 0x%02x len=%d\n", | |
2071 | desc_tag, desc_len); | |
2072 | ||
2073 | switch (desc_tag) { | |
2074 | case 0x48: | |
2075 | service_type = get8(&p, p_end); | |
2076 | if (service_type < 0) | |
2077 | break; | |
2078 | provider_name = getstr8(&p, p_end); | |
2079 | if (!provider_name) | |
2080 | break; | |
2081 | name = getstr8(&p, p_end); | |
2082 | if (name) { | |
2083 | AVProgram *program = av_new_program(ts->stream, sid); | |
2084 | if (program) { | |
2085 | av_dict_set(&program->metadata, "service_name", name, 0); | |
2086 | av_dict_set(&program->metadata, "service_provider", | |
2087 | provider_name, 0); | |
2088 | } | |
2089 | } | |
2090 | av_free(name); | |
2091 | av_free(provider_name); | |
2092 | break; | |
2093 | default: | |
2094 | break; | |
2095 | } | |
2096 | p = desc_end; | |
2097 | } | |
2098 | p = desc_list_end; | |
2099 | } | |
2100 | } | |
2101 | ||
2102 | static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, | |
2103 | const uint8_t *packet); | |
2104 | ||
2105 | /* handle one TS packet */ | |
2106 | static int handle_packet(MpegTSContext *ts, const uint8_t *packet) | |
2107 | { | |
2108 | MpegTSFilter *tss; | |
2109 | int len, pid, cc, expected_cc, cc_ok, afc, is_start, is_discontinuity, | |
2110 | has_adaptation, has_payload; | |
2111 | const uint8_t *p, *p_end; | |
2112 | int64_t pos; | |
2113 | ||
2114 | pid = AV_RB16(packet + 1) & 0x1fff; | |
2115 | if (pid && discard_pid(ts, pid)) | |
2116 | return 0; | |
2117 | is_start = packet[1] & 0x40; | |
2118 | tss = ts->pids[pid]; | |
2119 | if (ts->auto_guess && !tss && is_start) { | |
2120 | add_pes_stream(ts, pid, -1); | |
2121 | tss = ts->pids[pid]; | |
2122 | } | |
2123 | if (!tss) | |
2124 | return 0; | |
2125 | ts->current_pid = pid; | |
2126 | ||
2127 | afc = (packet[3] >> 4) & 3; | |
2128 | if (afc == 0) /* reserved value */ | |
2129 | return 0; | |
2130 | has_adaptation = afc & 2; | |
2131 | has_payload = afc & 1; | |
2132 | is_discontinuity = has_adaptation && | |
2133 | packet[4] != 0 && /* with length > 0 */ | |
2134 | (packet[5] & 0x80); /* and discontinuity indicated */ | |
2135 | ||
2136 | /* continuity check (currently not used) */ | |
2137 | cc = (packet[3] & 0xf); | |
2138 | expected_cc = has_payload ? (tss->last_cc + 1) & 0x0f : tss->last_cc; | |
2139 | cc_ok = pid == 0x1FFF || // null packet PID | |
2140 | is_discontinuity || | |
2141 | tss->last_cc < 0 || | |
2142 | expected_cc == cc; | |
2143 | ||
2144 | tss->last_cc = cc; | |
2145 | if (!cc_ok) { | |
2146 | av_log(ts->stream, AV_LOG_DEBUG, | |
2147 | "Continuity check failed for pid %d expected %d got %d\n", | |
2148 | pid, expected_cc, cc); | |
2149 | if (tss->type == MPEGTS_PES) { | |
2150 | PESContext *pc = tss->u.pes_filter.opaque; | |
2151 | pc->flags |= AV_PKT_FLAG_CORRUPT; | |
2152 | } | |
2153 | } | |
2154 | ||
2155 | p = packet + 4; | |
2156 | if (has_adaptation) { | |
2157 | int64_t pcr_h; | |
2158 | int pcr_l; | |
2159 | if (parse_pcr(&pcr_h, &pcr_l, packet) == 0) | |
2160 | tss->last_pcr = pcr_h * 300 + pcr_l; | |
2161 | /* skip adaptation field */ | |
2162 | p += p[0] + 1; | |
2163 | } | |
2164 | /* if past the end of packet, ignore */ | |
2165 | p_end = packet + TS_PACKET_SIZE; | |
2166 | if (p >= p_end || !has_payload) | |
2167 | return 0; | |
2168 | ||
2169 | pos = avio_tell(ts->stream->pb); | |
2170 | if (pos >= 0) { | |
2171 | av_assert0(pos >= TS_PACKET_SIZE); | |
2172 | ts->pos47_full = pos - TS_PACKET_SIZE; | |
2173 | } | |
2174 | ||
2175 | if (tss->type == MPEGTS_SECTION) { | |
2176 | if (is_start) { | |
2177 | /* pointer field present */ | |
2178 | len = *p++; | |
2179 | if (p + len > p_end) | |
2180 | return 0; | |
2181 | if (len && cc_ok) { | |
2182 | /* write remaining section bytes */ | |
2183 | write_section_data(ts, tss, | |
2184 | p, len, 0); | |
2185 | /* check whether filter has been closed */ | |
2186 | if (!ts->pids[pid]) | |
2187 | return 0; | |
2188 | } | |
2189 | p += len; | |
2190 | if (p < p_end) { | |
2191 | write_section_data(ts, tss, | |
2192 | p, p_end - p, 1); | |
2193 | } | |
2194 | } else { | |
2195 | if (cc_ok) { | |
2196 | write_section_data(ts, tss, | |
2197 | p, p_end - p, 0); | |
2198 | } | |
2199 | } | |
2200 | ||
2201 | // stop find_stream_info from waiting for more streams | |
2202 | // when all programs have received a PMT | |
f6fa7814 | 2203 | if (ts->stream->ctx_flags & AVFMTCTX_NOHEADER && ts->scan_all_pmts <= 0) { |
2ba45a60 DM |
2204 | int i; |
2205 | for (i = 0; i < ts->nb_prg; i++) { | |
2206 | if (!ts->prg[i].pmt_found) | |
2207 | break; | |
2208 | } | |
2209 | if (i == ts->nb_prg && ts->nb_prg > 0) { | |
f6fa7814 DM |
2210 | int types = 0; |
2211 | for (i = 0; i < ts->stream->nb_streams; i++) { | |
2212 | AVStream *st = ts->stream->streams[i]; | |
2213 | types |= 1<<st->codec->codec_type; | |
2214 | } | |
2215 | if ((types & (1<<AVMEDIA_TYPE_AUDIO) && types & (1<<AVMEDIA_TYPE_VIDEO)) || pos > 100000) { | |
2ba45a60 DM |
2216 | av_log(ts->stream, AV_LOG_DEBUG, "All programs have pmt, headers found\n"); |
2217 | ts->stream->ctx_flags &= ~AVFMTCTX_NOHEADER; | |
2218 | } | |
2219 | } | |
2220 | } | |
2221 | ||
2222 | } else { | |
2223 | int ret; | |
2224 | // Note: The position here points actually behind the current packet. | |
2225 | if (tss->type == MPEGTS_PES) { | |
2226 | if ((ret = tss->u.pes_filter.pes_cb(tss, p, p_end - p, is_start, | |
2227 | pos - ts->raw_packet_size)) < 0) | |
2228 | return ret; | |
2229 | } | |
2230 | } | |
2231 | ||
2232 | return 0; | |
2233 | } | |
2234 | ||
2235 | static void reanalyze(MpegTSContext *ts) { | |
2236 | AVIOContext *pb = ts->stream->pb; | |
2237 | int64_t pos = avio_tell(pb); | |
2238 | if (pos < 0) | |
2239 | return; | |
2240 | pos -= ts->pos47_full; | |
2241 | if (pos == TS_PACKET_SIZE) { | |
2242 | ts->size_stat[0] ++; | |
2243 | } else if (pos == TS_DVHS_PACKET_SIZE) { | |
2244 | ts->size_stat[1] ++; | |
2245 | } else if (pos == TS_FEC_PACKET_SIZE) { | |
2246 | ts->size_stat[2] ++; | |
2247 | } | |
2248 | ||
2249 | ts->size_stat_count ++; | |
2250 | if (ts->size_stat_count > SIZE_STAT_THRESHOLD) { | |
2251 | int newsize = 0; | |
2252 | if (ts->size_stat[0] > SIZE_STAT_THRESHOLD) { | |
2253 | newsize = TS_PACKET_SIZE; | |
2254 | } else if (ts->size_stat[1] > SIZE_STAT_THRESHOLD) { | |
2255 | newsize = TS_DVHS_PACKET_SIZE; | |
2256 | } else if (ts->size_stat[2] > SIZE_STAT_THRESHOLD) { | |
2257 | newsize = TS_FEC_PACKET_SIZE; | |
2258 | } | |
2259 | if (newsize && newsize != ts->raw_packet_size) { | |
2260 | av_log(ts->stream, AV_LOG_WARNING, "changing packet size to %d\n", newsize); | |
2261 | ts->raw_packet_size = newsize; | |
2262 | } | |
2263 | ts->size_stat_count = 0; | |
2264 | memset(ts->size_stat, 0, sizeof(ts->size_stat)); | |
2265 | } | |
2266 | } | |
2267 | ||
2268 | /* XXX: try to find a better synchro over several packets (use | |
2269 | * get_packet_size() ?) */ | |
2270 | static int mpegts_resync(AVFormatContext *s) | |
2271 | { | |
2272 | MpegTSContext *ts = s->priv_data; | |
2273 | AVIOContext *pb = s->pb; | |
2274 | int c, i; | |
2275 | ||
2276 | for (i = 0; i < ts->resync_size; i++) { | |
2277 | c = avio_r8(pb); | |
2278 | if (avio_feof(pb)) | |
2279 | return AVERROR_EOF; | |
2280 | if (c == 0x47) { | |
2281 | avio_seek(pb, -1, SEEK_CUR); | |
2282 | reanalyze(s->priv_data); | |
2283 | return 0; | |
2284 | } | |
2285 | } | |
2286 | av_log(s, AV_LOG_ERROR, | |
2287 | "max resync size reached, could not find sync byte\n"); | |
2288 | /* no sync found */ | |
2289 | return AVERROR_INVALIDDATA; | |
2290 | } | |
2291 | ||
2292 | /* return AVERROR_something if error or EOF. Return 0 if OK. */ | |
2293 | static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size, | |
2294 | const uint8_t **data) | |
2295 | { | |
2296 | AVIOContext *pb = s->pb; | |
2297 | int len; | |
2298 | ||
2299 | for (;;) { | |
2300 | len = ffio_read_indirect(pb, buf, TS_PACKET_SIZE, data); | |
2301 | if (len != TS_PACKET_SIZE) | |
2302 | return len < 0 ? len : AVERROR_EOF; | |
2303 | /* check packet sync byte */ | |
2304 | if ((*data)[0] != 0x47) { | |
2305 | /* find a new packet start */ | |
2306 | uint64_t pos = avio_tell(pb); | |
2307 | avio_seek(pb, -FFMIN(raw_packet_size, pos), SEEK_CUR); | |
2308 | ||
2309 | if (mpegts_resync(s) < 0) | |
2310 | return AVERROR(EAGAIN); | |
2311 | else | |
2312 | continue; | |
2313 | } else { | |
2314 | break; | |
2315 | } | |
2316 | } | |
2317 | return 0; | |
2318 | } | |
2319 | ||
2320 | static void finished_reading_packet(AVFormatContext *s, int raw_packet_size) | |
2321 | { | |
2322 | AVIOContext *pb = s->pb; | |
2323 | int skip = raw_packet_size - TS_PACKET_SIZE; | |
2324 | if (skip > 0) | |
2325 | avio_skip(pb, skip); | |
2326 | } | |
2327 | ||
2328 | static int handle_packets(MpegTSContext *ts, int64_t nb_packets) | |
2329 | { | |
2330 | AVFormatContext *s = ts->stream; | |
2331 | uint8_t packet[TS_PACKET_SIZE + FF_INPUT_BUFFER_PADDING_SIZE]; | |
2332 | const uint8_t *data; | |
2333 | int64_t packet_num; | |
2334 | int ret = 0; | |
2335 | ||
2336 | if (avio_tell(s->pb) != ts->last_pos) { | |
2337 | int i; | |
2338 | av_dlog(ts->stream, "Skipping after seek\n"); | |
2339 | /* seek detected, flush pes buffer */ | |
2340 | for (i = 0; i < NB_PID_MAX; i++) { | |
2341 | if (ts->pids[i]) { | |
2342 | if (ts->pids[i]->type == MPEGTS_PES) { | |
2343 | PESContext *pes = ts->pids[i]->u.pes_filter.opaque; | |
2344 | av_buffer_unref(&pes->buffer); | |
2345 | pes->data_index = 0; | |
2346 | pes->state = MPEGTS_SKIP; /* skip until pes header */ | |
2347 | } | |
2348 | ts->pids[i]->last_cc = -1; | |
2349 | ts->pids[i]->last_pcr = -1; | |
2350 | } | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | ts->stop_parse = 0; | |
2355 | packet_num = 0; | |
2356 | memset(packet + TS_PACKET_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
2357 | for (;;) { | |
2358 | packet_num++; | |
2359 | if (nb_packets != 0 && packet_num >= nb_packets || | |
2360 | ts->stop_parse > 1) { | |
2361 | ret = AVERROR(EAGAIN); | |
2362 | break; | |
2363 | } | |
2364 | if (ts->stop_parse > 0) | |
2365 | break; | |
2366 | ||
2367 | ret = read_packet(s, packet, ts->raw_packet_size, &data); | |
2368 | if (ret != 0) | |
2369 | break; | |
2370 | ret = handle_packet(ts, data); | |
2371 | finished_reading_packet(s, ts->raw_packet_size); | |
2372 | if (ret != 0) | |
2373 | break; | |
2374 | } | |
2375 | ts->last_pos = avio_tell(s->pb); | |
2376 | return ret; | |
2377 | } | |
2378 | ||
2379 | static int mpegts_probe(AVProbeData *p) | |
2380 | { | |
2381 | const int size = p->buf_size; | |
2382 | int maxscore = 0; | |
2383 | int sumscore = 0; | |
2384 | int i; | |
2385 | int check_count = size / TS_FEC_PACKET_SIZE; | |
2386 | #define CHECK_COUNT 10 | |
2387 | #define CHECK_BLOCK 100 | |
2388 | ||
2389 | if (check_count < CHECK_COUNT) | |
2390 | return AVERROR_INVALIDDATA; | |
2391 | ||
2392 | for (i = 0; i<check_count; i+=CHECK_BLOCK) { | |
2393 | int left = FFMIN(check_count - i, CHECK_BLOCK); | |
2394 | int score = analyze(p->buf + TS_PACKET_SIZE *i, TS_PACKET_SIZE *left, TS_PACKET_SIZE , NULL); | |
2395 | int dvhs_score = analyze(p->buf + TS_DVHS_PACKET_SIZE*i, TS_DVHS_PACKET_SIZE*left, TS_DVHS_PACKET_SIZE, NULL); | |
2396 | int fec_score = analyze(p->buf + TS_FEC_PACKET_SIZE *i, TS_FEC_PACKET_SIZE *left, TS_FEC_PACKET_SIZE , NULL); | |
2397 | score = FFMAX3(score, dvhs_score, fec_score); | |
2398 | sumscore += score; | |
2399 | maxscore = FFMAX(maxscore, score); | |
2400 | } | |
2401 | ||
2402 | sumscore = sumscore * CHECK_COUNT / check_count; | |
2403 | maxscore = maxscore * CHECK_COUNT / CHECK_BLOCK; | |
2404 | ||
2405 | av_dlog(0, "TS score: %d %d\n", sumscore, maxscore); | |
2406 | ||
2407 | if (sumscore > 6) return AVPROBE_SCORE_MAX + sumscore - CHECK_COUNT; | |
2408 | else if (maxscore > 6) return AVPROBE_SCORE_MAX/2 + sumscore - CHECK_COUNT; | |
2409 | else | |
2410 | return AVERROR_INVALIDDATA; | |
2411 | } | |
2412 | ||
2413 | /* return the 90kHz PCR and the extension for the 27MHz PCR. return | |
2414 | * (-1) if not available */ | |
2415 | static int parse_pcr(int64_t *ppcr_high, int *ppcr_low, const uint8_t *packet) | |
2416 | { | |
2417 | int afc, len, flags; | |
2418 | const uint8_t *p; | |
2419 | unsigned int v; | |
2420 | ||
2421 | afc = (packet[3] >> 4) & 3; | |
2422 | if (afc <= 1) | |
2423 | return AVERROR_INVALIDDATA; | |
2424 | p = packet + 4; | |
2425 | len = p[0]; | |
2426 | p++; | |
2427 | if (len == 0) | |
2428 | return AVERROR_INVALIDDATA; | |
2429 | flags = *p++; | |
2430 | len--; | |
2431 | if (!(flags & 0x10)) | |
2432 | return AVERROR_INVALIDDATA; | |
2433 | if (len < 6) | |
2434 | return AVERROR_INVALIDDATA; | |
2435 | v = AV_RB32(p); | |
2436 | *ppcr_high = ((int64_t) v << 1) | (p[4] >> 7); | |
2437 | *ppcr_low = ((p[4] & 1) << 8) | p[5]; | |
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static void seek_back(AVFormatContext *s, AVIOContext *pb, int64_t pos) { | |
2442 | ||
2443 | /* NOTE: We attempt to seek on non-seekable files as well, as the | |
2444 | * probe buffer usually is big enough. Only warn if the seek failed | |
2445 | * on files where the seek should work. */ | |
2446 | if (avio_seek(pb, pos, SEEK_SET) < 0) | |
2447 | av_log(s, pb->seekable ? AV_LOG_ERROR : AV_LOG_INFO, "Unable to seek back to the start\n"); | |
2448 | } | |
2449 | ||
2450 | static int mpegts_read_header(AVFormatContext *s) | |
2451 | { | |
2452 | MpegTSContext *ts = s->priv_data; | |
2453 | AVIOContext *pb = s->pb; | |
2454 | uint8_t buf[8 * 1024] = {0}; | |
2455 | int len; | |
2456 | int64_t pos, probesize = s->probesize ? s->probesize : s->probesize2; | |
2457 | ||
2458 | ffio_ensure_seekback(pb, probesize); | |
2459 | ||
2460 | /* read the first 8192 bytes to get packet size */ | |
2461 | pos = avio_tell(pb); | |
2462 | len = avio_read(pb, buf, sizeof(buf)); | |
2463 | ts->raw_packet_size = get_packet_size(buf, len); | |
2464 | if (ts->raw_packet_size <= 0) { | |
2465 | av_log(s, AV_LOG_WARNING, "Could not detect TS packet size, defaulting to non-FEC/DVHS\n"); | |
2466 | ts->raw_packet_size = TS_PACKET_SIZE; | |
2467 | } | |
2468 | ts->stream = s; | |
2469 | ts->auto_guess = 0; | |
2470 | ||
2471 | if (s->iformat == &ff_mpegts_demuxer) { | |
2472 | /* normal demux */ | |
2473 | ||
2474 | /* first do a scan to get all the services */ | |
2475 | seek_back(s, pb, pos); | |
2476 | ||
2477 | mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); | |
2478 | ||
2479 | mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1); | |
2480 | ||
2481 | handle_packets(ts, probesize / ts->raw_packet_size); | |
2482 | /* if could not find service, enable auto_guess */ | |
2483 | ||
2484 | ts->auto_guess = 1; | |
2485 | ||
2486 | av_dlog(ts->stream, "tuning done\n"); | |
2487 | ||
2488 | s->ctx_flags |= AVFMTCTX_NOHEADER; | |
2489 | } else { | |
2490 | AVStream *st; | |
2491 | int pcr_pid, pid, nb_packets, nb_pcrs, ret, pcr_l; | |
2492 | int64_t pcrs[2], pcr_h; | |
2493 | int packet_count[2]; | |
2494 | uint8_t packet[TS_PACKET_SIZE]; | |
2495 | const uint8_t *data; | |
2496 | ||
2497 | /* only read packets */ | |
2498 | ||
2499 | st = avformat_new_stream(s, NULL); | |
2500 | if (!st) | |
2501 | return AVERROR(ENOMEM); | |
2502 | avpriv_set_pts_info(st, 60, 1, 27000000); | |
2503 | st->codec->codec_type = AVMEDIA_TYPE_DATA; | |
2504 | st->codec->codec_id = AV_CODEC_ID_MPEG2TS; | |
2505 | ||
2506 | /* we iterate until we find two PCRs to estimate the bitrate */ | |
2507 | pcr_pid = -1; | |
2508 | nb_pcrs = 0; | |
2509 | nb_packets = 0; | |
2510 | for (;;) { | |
2511 | ret = read_packet(s, packet, ts->raw_packet_size, &data); | |
2512 | if (ret < 0) | |
2513 | return ret; | |
2514 | pid = AV_RB16(data + 1) & 0x1fff; | |
2515 | if ((pcr_pid == -1 || pcr_pid == pid) && | |
2516 | parse_pcr(&pcr_h, &pcr_l, data) == 0) { | |
2517 | finished_reading_packet(s, ts->raw_packet_size); | |
2518 | pcr_pid = pid; | |
2519 | packet_count[nb_pcrs] = nb_packets; | |
2520 | pcrs[nb_pcrs] = pcr_h * 300 + pcr_l; | |
2521 | nb_pcrs++; | |
2522 | if (nb_pcrs >= 2) | |
2523 | break; | |
2524 | } else { | |
2525 | finished_reading_packet(s, ts->raw_packet_size); | |
2526 | } | |
2527 | nb_packets++; | |
2528 | } | |
2529 | ||
2530 | /* NOTE1: the bitrate is computed without the FEC */ | |
2531 | /* NOTE2: it is only the bitrate of the start of the stream */ | |
2532 | ts->pcr_incr = (pcrs[1] - pcrs[0]) / (packet_count[1] - packet_count[0]); | |
2533 | ts->cur_pcr = pcrs[0] - ts->pcr_incr * packet_count[0]; | |
2534 | s->bit_rate = TS_PACKET_SIZE * 8 * 27e6 / ts->pcr_incr; | |
2535 | st->codec->bit_rate = s->bit_rate; | |
2536 | st->start_time = ts->cur_pcr; | |
2537 | av_dlog(ts->stream, "start=%0.3f pcr=%0.3f incr=%d\n", | |
2538 | st->start_time / 1000000.0, pcrs[0] / 27e6, ts->pcr_incr); | |
2539 | } | |
2540 | ||
2541 | seek_back(s, pb, pos); | |
2542 | return 0; | |
2543 | } | |
2544 | ||
2545 | #define MAX_PACKET_READAHEAD ((128 * 1024) / 188) | |
2546 | ||
2547 | static int mpegts_raw_read_packet(AVFormatContext *s, AVPacket *pkt) | |
2548 | { | |
2549 | MpegTSContext *ts = s->priv_data; | |
2550 | int ret, i; | |
2551 | int64_t pcr_h, next_pcr_h, pos; | |
2552 | int pcr_l, next_pcr_l; | |
2553 | uint8_t pcr_buf[12]; | |
2554 | const uint8_t *data; | |
2555 | ||
2556 | if (av_new_packet(pkt, TS_PACKET_SIZE) < 0) | |
2557 | return AVERROR(ENOMEM); | |
2558 | ret = read_packet(s, pkt->data, ts->raw_packet_size, &data); | |
2559 | pkt->pos = avio_tell(s->pb); | |
2560 | if (ret < 0) { | |
2561 | av_free_packet(pkt); | |
2562 | return ret; | |
2563 | } | |
2564 | if (data != pkt->data) | |
2565 | memcpy(pkt->data, data, ts->raw_packet_size); | |
2566 | finished_reading_packet(s, ts->raw_packet_size); | |
2567 | if (ts->mpeg2ts_compute_pcr) { | |
2568 | /* compute exact PCR for each packet */ | |
2569 | if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) { | |
2570 | /* we read the next PCR (XXX: optimize it by using a bigger buffer */ | |
2571 | pos = avio_tell(s->pb); | |
2572 | for (i = 0; i < MAX_PACKET_READAHEAD; i++) { | |
2573 | avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET); | |
2574 | avio_read(s->pb, pcr_buf, 12); | |
2575 | if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) { | |
2576 | /* XXX: not precise enough */ | |
2577 | ts->pcr_incr = | |
2578 | ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) / | |
2579 | (i + 1); | |
2580 | break; | |
2581 | } | |
2582 | } | |
2583 | avio_seek(s->pb, pos, SEEK_SET); | |
2584 | /* no next PCR found: we use previous increment */ | |
2585 | ts->cur_pcr = pcr_h * 300 + pcr_l; | |
2586 | } | |
2587 | pkt->pts = ts->cur_pcr; | |
2588 | pkt->duration = ts->pcr_incr; | |
2589 | ts->cur_pcr += ts->pcr_incr; | |
2590 | } | |
2591 | pkt->stream_index = 0; | |
2592 | return 0; | |
2593 | } | |
2594 | ||
2595 | static int mpegts_read_packet(AVFormatContext *s, AVPacket *pkt) | |
2596 | { | |
2597 | MpegTSContext *ts = s->priv_data; | |
2598 | int ret, i; | |
2599 | ||
2600 | pkt->size = -1; | |
2601 | ts->pkt = pkt; | |
2602 | ret = handle_packets(ts, 0); | |
2603 | if (ret < 0) { | |
2604 | av_free_packet(ts->pkt); | |
2605 | /* flush pes data left */ | |
2606 | for (i = 0; i < NB_PID_MAX; i++) | |
2607 | if (ts->pids[i] && ts->pids[i]->type == MPEGTS_PES) { | |
2608 | PESContext *pes = ts->pids[i]->u.pes_filter.opaque; | |
2609 | if (pes->state == MPEGTS_PAYLOAD && pes->data_index > 0) { | |
2610 | new_pes_packet(pes, pkt); | |
2611 | pes->state = MPEGTS_SKIP; | |
2612 | ret = 0; | |
2613 | break; | |
2614 | } | |
2615 | } | |
2616 | } | |
2617 | ||
2618 | if (!ret && pkt->size < 0) | |
2619 | ret = AVERROR(EINTR); | |
2620 | return ret; | |
2621 | } | |
2622 | ||
2623 | static void mpegts_free(MpegTSContext *ts) | |
2624 | { | |
2625 | int i; | |
2626 | ||
2627 | clear_programs(ts); | |
2628 | ||
2629 | for (i = 0; i < NB_PID_MAX; i++) | |
2630 | if (ts->pids[i]) | |
2631 | mpegts_close_filter(ts, ts->pids[i]); | |
2632 | } | |
2633 | ||
2634 | static int mpegts_read_close(AVFormatContext *s) | |
2635 | { | |
2636 | MpegTSContext *ts = s->priv_data; | |
2637 | mpegts_free(ts); | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2641 | static av_unused int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index, | |
2642 | int64_t *ppos, int64_t pos_limit) | |
2643 | { | |
2644 | MpegTSContext *ts = s->priv_data; | |
2645 | int64_t pos, timestamp; | |
2646 | uint8_t buf[TS_PACKET_SIZE]; | |
2647 | int pcr_l, pcr_pid = | |
2648 | ((PESContext *)s->streams[stream_index]->priv_data)->pcr_pid; | |
2649 | int pos47 = ts->pos47_full % ts->raw_packet_size; | |
2650 | pos = | |
2651 | ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * | |
2652 | ts->raw_packet_size + pos47; | |
2653 | while(pos < pos_limit) { | |
2654 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) | |
2655 | return AV_NOPTS_VALUE; | |
2656 | if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE) | |
2657 | return AV_NOPTS_VALUE; | |
2658 | if (buf[0] != 0x47) { | |
2659 | avio_seek(s->pb, -TS_PACKET_SIZE, SEEK_CUR); | |
2660 | if (mpegts_resync(s) < 0) | |
2661 | return AV_NOPTS_VALUE; | |
2662 | pos = avio_tell(s->pb); | |
2663 | continue; | |
2664 | } | |
2665 | if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) && | |
2666 | parse_pcr(×tamp, &pcr_l, buf) == 0) { | |
2667 | *ppos = pos; | |
2668 | return timestamp; | |
2669 | } | |
2670 | pos += ts->raw_packet_size; | |
2671 | } | |
2672 | ||
2673 | return AV_NOPTS_VALUE; | |
2674 | } | |
2675 | ||
2676 | static int64_t mpegts_get_dts(AVFormatContext *s, int stream_index, | |
2677 | int64_t *ppos, int64_t pos_limit) | |
2678 | { | |
2679 | MpegTSContext *ts = s->priv_data; | |
2680 | int64_t pos; | |
2681 | int pos47 = ts->pos47_full % ts->raw_packet_size; | |
2682 | pos = ((*ppos + ts->raw_packet_size - 1 - pos47) / ts->raw_packet_size) * ts->raw_packet_size + pos47; | |
2683 | ff_read_frame_flush(s); | |
2684 | if (avio_seek(s->pb, pos, SEEK_SET) < 0) | |
2685 | return AV_NOPTS_VALUE; | |
2686 | while(pos < pos_limit) { | |
2687 | int ret; | |
2688 | AVPacket pkt; | |
2689 | av_init_packet(&pkt); | |
2690 | ret = av_read_frame(s, &pkt); | |
2691 | if (ret < 0) | |
2692 | return AV_NOPTS_VALUE; | |
2693 | av_free_packet(&pkt); | |
2694 | if (pkt.dts != AV_NOPTS_VALUE && pkt.pos >= 0) { | |
2695 | ff_reduce_index(s, pkt.stream_index); | |
2696 | av_add_index_entry(s->streams[pkt.stream_index], pkt.pos, pkt.dts, 0, 0, AVINDEX_KEYFRAME /* FIXME keyframe? */); | |
2697 | if (pkt.stream_index == stream_index && pkt.pos >= *ppos) { | |
2698 | *ppos = pkt.pos; | |
2699 | return pkt.dts; | |
2700 | } | |
2701 | } | |
2702 | pos = pkt.pos; | |
2703 | } | |
2704 | ||
2705 | return AV_NOPTS_VALUE; | |
2706 | } | |
2707 | ||
2708 | /**************************************************************/ | |
2709 | /* parsing functions - called from other demuxers such as RTP */ | |
2710 | ||
2711 | MpegTSContext *avpriv_mpegts_parse_open(AVFormatContext *s) | |
2712 | { | |
2713 | MpegTSContext *ts; | |
2714 | ||
2715 | ts = av_mallocz(sizeof(MpegTSContext)); | |
2716 | if (!ts) | |
2717 | return NULL; | |
2718 | /* no stream case, currently used by RTP */ | |
2719 | ts->raw_packet_size = TS_PACKET_SIZE; | |
2720 | ts->stream = s; | |
2721 | ts->auto_guess = 1; | |
2722 | mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1); | |
2723 | mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1); | |
2724 | ||
2725 | return ts; | |
2726 | } | |
2727 | ||
2728 | /* return the consumed length if a packet was output, or -1 if no | |
2729 | * packet is output */ | |
2730 | int avpriv_mpegts_parse_packet(MpegTSContext *ts, AVPacket *pkt, | |
2731 | const uint8_t *buf, int len) | |
2732 | { | |
2733 | int len1; | |
2734 | ||
2735 | len1 = len; | |
2736 | ts->pkt = pkt; | |
2737 | for (;;) { | |
2738 | ts->stop_parse = 0; | |
2739 | if (len < TS_PACKET_SIZE) | |
2740 | return AVERROR_INVALIDDATA; | |
2741 | if (buf[0] != 0x47) { | |
2742 | buf++; | |
2743 | len--; | |
2744 | } else { | |
2745 | handle_packet(ts, buf); | |
2746 | buf += TS_PACKET_SIZE; | |
2747 | len -= TS_PACKET_SIZE; | |
2748 | if (ts->stop_parse == 1) | |
2749 | break; | |
2750 | } | |
2751 | } | |
2752 | return len1 - len; | |
2753 | } | |
2754 | ||
2755 | void avpriv_mpegts_parse_close(MpegTSContext *ts) | |
2756 | { | |
2757 | mpegts_free(ts); | |
2758 | av_free(ts); | |
2759 | } | |
2760 | ||
2761 | AVInputFormat ff_mpegts_demuxer = { | |
2762 | .name = "mpegts", | |
2763 | .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"), | |
2764 | .priv_data_size = sizeof(MpegTSContext), | |
2765 | .read_probe = mpegts_probe, | |
2766 | .read_header = mpegts_read_header, | |
2767 | .read_packet = mpegts_read_packet, | |
2768 | .read_close = mpegts_read_close, | |
2769 | .read_timestamp = mpegts_get_dts, | |
2770 | .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, | |
2771 | .priv_class = &mpegts_class, | |
2772 | }; | |
2773 | ||
2774 | AVInputFormat ff_mpegtsraw_demuxer = { | |
2775 | .name = "mpegtsraw", | |
2776 | .long_name = NULL_IF_CONFIG_SMALL("raw MPEG-TS (MPEG-2 Transport Stream)"), | |
2777 | .priv_data_size = sizeof(MpegTSContext), | |
2778 | .read_header = mpegts_read_header, | |
2779 | .read_packet = mpegts_raw_read_packet, | |
2780 | .read_close = mpegts_read_close, | |
2781 | .read_timestamp = mpegts_get_dts, | |
2782 | .flags = AVFMT_SHOW_IDS | AVFMT_TS_DISCONT, | |
2783 | .priv_class = &mpegtsraw_class, | |
2784 | }; |