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1/*
2 * MPEG-2 transport stream (aka DVB) muxer
3 * Copyright (c) 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/avassert.h"
23#include "libavutil/bswap.h"
24#include "libavutil/crc.h"
25#include "libavutil/dict.h"
26#include "libavutil/intreadwrite.h"
27#include "libavutil/mathematics.h"
28#include "libavutil/opt.h"
29
30#include "libavcodec/internal.h"
31
32#include "avformat.h"
33#include "avio_internal.h"
34#include "internal.h"
35#include "mpegts.h"
36
37#define PCR_TIME_BASE 27000000
38
39/* write DVB SI sections */
40
41#define DVB_PRIVATE_NETWORK_START 0xff01
42
43/*********************************************/
44/* mpegts section writer */
45
46typedef struct MpegTSSection {
47 int pid;
48 int cc;
49 int discontinuity;
50 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
51 void *opaque;
52} MpegTSSection;
53
54typedef struct MpegTSService {
55 MpegTSSection pmt; /* MPEG-2 PMT table context */
56 int sid; /* service ID */
57 char *name;
58 char *provider_name;
59 int pcr_pid;
60 int pcr_packet_count;
61 int pcr_packet_period;
62 AVProgram *program;
63} MpegTSService;
64
65// service_type values as defined in ETSI 300 468
66enum {
67 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
68 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
69 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
70 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
71 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
72 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
73 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
74 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
75};
76typedef struct MpegTSWrite {
77 const AVClass *av_class;
78 MpegTSSection pat; /* MPEG-2 PAT table */
79 MpegTSSection sdt; /* MPEG-2 SDT table context */
80 MpegTSService **services;
81 int sdt_packet_count;
82 int sdt_packet_period;
83 int pat_packet_count;
84 int pat_packet_period;
85 int nb_services;
86 int onid;
87 int tsid;
88 int64_t first_pcr;
89 int mux_rate; ///< set to 1 when VBR
90 int pes_payload_size;
91
92 int transport_stream_id;
93 int original_network_id;
94 int service_id;
95 int service_type;
96
97 int pmt_start_pid;
98 int start_pid;
99 int m2ts_mode;
100
101 int reemit_pat_pmt; // backward compatibility
102
103 int pcr_period;
104#define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
105#define MPEGTS_FLAG_AAC_LATM 0x02
106#define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
107#define MPEGTS_FLAG_SYSTEM_B 0x08
108#define MPEGTS_FLAG_DISCONT 0x10
109 int flags;
110 int copyts;
111 int tables_version;
112 double pat_period;
113 double sdt_period;
114 int64_t last_pat_ts;
115 int64_t last_sdt_ts;
116
117 int omit_video_pes_length;
118} MpegTSWrite;
119
120/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
121#define DEFAULT_PES_HEADER_FREQ 16
122#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
123
124/* The section length is 12 bits. The first 2 are set to 0, the remaining
125 * 10 bits should not exceed 1021. */
126#define SECTION_LENGTH 1020
127
128/* NOTE: 4 bytes must be left at the end for the crc32 */
129static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
130{
131 unsigned int crc;
132 unsigned char packet[TS_PACKET_SIZE];
133 const unsigned char *buf_ptr;
134 unsigned char *q;
135 int first, b, len1, left;
136
137 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
138 -1, buf, len - 4));
139
140 buf[len - 4] = (crc >> 24) & 0xff;
141 buf[len - 3] = (crc >> 16) & 0xff;
142 buf[len - 2] = (crc >> 8) & 0xff;
143 buf[len - 1] = crc & 0xff;
144
145 /* send each packet */
146 buf_ptr = buf;
147 while (len > 0) {
148 first = buf == buf_ptr;
149 q = packet;
150 *q++ = 0x47;
151 b = s->pid >> 8;
152 if (first)
153 b |= 0x40;
154 *q++ = b;
155 *q++ = s->pid;
156 s->cc = s->cc + 1 & 0xf;
157 *q++ = 0x10 | s->cc;
158 if (s->discontinuity) {
159 q[-1] |= 0x20;
160 *q++ = 1;
161 *q++ = 0x80;
162 s->discontinuity = 0;
163 }
164 if (first)
165 *q++ = 0; /* 0 offset */
166 len1 = TS_PACKET_SIZE - (q - packet);
167 if (len1 > len)
168 len1 = len;
169 memcpy(q, buf_ptr, len1);
170 q += len1;
171 /* add known padding data */
172 left = TS_PACKET_SIZE - (q - packet);
173 if (left > 0)
174 memset(q, 0xff, left);
175
176 s->write_packet(s, packet);
177
178 buf_ptr += len1;
179 len -= len1;
180 }
181}
182
183static inline void put16(uint8_t **q_ptr, int val)
184{
185 uint8_t *q;
186 q = *q_ptr;
187 *q++ = val >> 8;
188 *q++ = val;
189 *q_ptr = q;
190}
191
192static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
193 int version, int sec_num, int last_sec_num,
194 uint8_t *buf, int len)
195{
196 uint8_t section[1024], *q;
197 unsigned int tot_len;
198 /* reserved_future_use field must be set to 1 for SDT */
199 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
200
201 tot_len = 3 + 5 + len + 4;
202 /* check if not too big */
203 if (tot_len > 1024)
204 return AVERROR_INVALIDDATA;
205
206 q = section;
207 *q++ = tid;
208 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
209 put16(&q, id);
210 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
211 *q++ = sec_num;
212 *q++ = last_sec_num;
213 memcpy(q, buf, len);
214
215 mpegts_write_section(s, section, tot_len);
216 return 0;
217}
218
219/*********************************************/
220/* mpegts writer */
221
222#define DEFAULT_PROVIDER_NAME "FFmpeg"
223#define DEFAULT_SERVICE_NAME "Service01"
224
225/* we retransmit the SI info at this rate */
226#define SDT_RETRANS_TIME 500
227#define PAT_RETRANS_TIME 100
228#define PCR_RETRANS_TIME 20
229
230typedef struct MpegTSWriteStream {
231 struct MpegTSService *service;
232 int pid; /* stream associated pid */
233 int cc;
234 int discontinuity;
235 int payload_size;
236 int first_pts_check; ///< first pts check needed
237 int prev_payload_key;
238 int64_t payload_pts;
239 int64_t payload_dts;
240 int payload_flags;
241 uint8_t *payload;
242 AVFormatContext *amux;
243 AVRational user_tb;
244
245 /* For Opus */
246 int opus_queued_samples;
247 int opus_pending_trim_start;
248} MpegTSWriteStream;
249
250static void mpegts_write_pat(AVFormatContext *s)
251{
252 MpegTSWrite *ts = s->priv_data;
253 MpegTSService *service;
254 uint8_t data[SECTION_LENGTH], *q;
255 int i;
256
257 q = data;
258 for (i = 0; i < ts->nb_services; i++) {
259 service = ts->services[i];
260 put16(&q, service->sid);
261 put16(&q, 0xe000 | service->pmt.pid);
262 }
263 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
264 data, q - data);
265}
266
267/* NOTE: !str is accepted for an empty string */
268static void putstr8(uint8_t **q_ptr, const char *str, int write_len)
269{
270 uint8_t *q;
271 int len;
272
273 q = *q_ptr;
274 if (!str)
275 len = 0;
276 else
277 len = strlen(str);
278 if (write_len)
279 *q++ = len;
280 memcpy(q, str, len);
281 q += len;
282 *q_ptr = q;
283}
284
285static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
286{
287 MpegTSWrite *ts = s->priv_data;
288 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
289 int val, stream_type, i, err = 0;
290
291 q = data;
292 put16(&q, 0xe000 | service->pcr_pid);
293
294 program_info_length_ptr = q;
295 q += 2; /* patched after */
296
297 /* put program info here */
298
299 val = 0xf000 | (q - program_info_length_ptr - 2);
300 program_info_length_ptr[0] = val >> 8;
301 program_info_length_ptr[1] = val;
302
303 for (i = 0; i < s->nb_streams; i++) {
304 AVStream *st = s->streams[i];
305 MpegTSWriteStream *ts_st = st->priv_data;
306 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
307
308 if (s->nb_programs) {
309 int k, found = 0;
310 AVProgram *program = service->program;
311
312 for (k = 0; k < program->nb_stream_indexes; k++)
313 if (program->stream_index[k] == i) {
314 found = 1;
315 break;
316 }
317
318 if (!found)
319 continue;
320 }
321
322 if (q - data > SECTION_LENGTH - 32) {
323 err = 1;
324 break;
325 }
326 switch (st->codecpar->codec_id) {
327 case AV_CODEC_ID_MPEG1VIDEO:
328 case AV_CODEC_ID_MPEG2VIDEO:
329 stream_type = STREAM_TYPE_VIDEO_MPEG2;
330 break;
331 case AV_CODEC_ID_MPEG4:
332 stream_type = STREAM_TYPE_VIDEO_MPEG4;
333 break;
334 case AV_CODEC_ID_H264:
335 stream_type = STREAM_TYPE_VIDEO_H264;
336 break;
337 case AV_CODEC_ID_HEVC:
338 stream_type = STREAM_TYPE_VIDEO_HEVC;
339 break;
340 case AV_CODEC_ID_CAVS:
341 stream_type = STREAM_TYPE_VIDEO_CAVS;
342 break;
343 case AV_CODEC_ID_DIRAC:
344 stream_type = STREAM_TYPE_VIDEO_DIRAC;
345 break;
346 case AV_CODEC_ID_VC1:
347 stream_type = STREAM_TYPE_VIDEO_VC1;
348 break;
349 case AV_CODEC_ID_MP2:
350 case AV_CODEC_ID_MP3:
351 if ( st->codecpar->sample_rate > 0
352 && st->codecpar->sample_rate < 32000) {
353 stream_type = STREAM_TYPE_AUDIO_MPEG2;
354 } else {
355 stream_type = STREAM_TYPE_AUDIO_MPEG1;
356 }
357 break;
358 case AV_CODEC_ID_AAC:
359 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
360 ? STREAM_TYPE_AUDIO_AAC_LATM
361 : STREAM_TYPE_AUDIO_AAC;
362 break;
363 case AV_CODEC_ID_AAC_LATM:
364 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
365 break;
366 case AV_CODEC_ID_AC3:
367 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
368 ? STREAM_TYPE_PRIVATE_DATA
369 : STREAM_TYPE_AUDIO_AC3;
370 break;
371 case AV_CODEC_ID_EAC3:
372 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
373 ? STREAM_TYPE_PRIVATE_DATA
374 : STREAM_TYPE_AUDIO_EAC3;
375 break;
376 case AV_CODEC_ID_DTS:
377 stream_type = STREAM_TYPE_AUDIO_DTS;
378 break;
379 case AV_CODEC_ID_TRUEHD:
380 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
381 break;
382 case AV_CODEC_ID_OPUS:
383 stream_type = STREAM_TYPE_PRIVATE_DATA;
384 break;
385 case AV_CODEC_ID_TIMED_ID3:
386 stream_type = STREAM_TYPE_METADATA;
387 break;
388 default:
389 stream_type = STREAM_TYPE_PRIVATE_DATA;
390 break;
391 }
392
393 *q++ = stream_type;
394 put16(&q, 0xe000 | ts_st->pid);
395 desc_length_ptr = q;
396 q += 2; /* patched after */
397
398 /* write optional descriptors here */
399 switch (st->codecpar->codec_type) {
400 case AVMEDIA_TYPE_AUDIO:
401 if (st->codecpar->codec_id==AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
402 *q++=0x6a; // AC3 descriptor see A038 DVB SI
403 *q++=1; // 1 byte, all flags sets to 0
404 *q++=0; // omit all fields...
405 }
406 if (st->codecpar->codec_id==AV_CODEC_ID_EAC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
407 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
408 *q++=1; // 1 byte, all flags sets to 0
409 *q++=0; // omit all fields...
410 }
411 if (st->codecpar->codec_id==AV_CODEC_ID_S302M) {
412 *q++ = 0x05; /* MPEG-2 registration descriptor*/
413 *q++ = 4;
414 *q++ = 'B';
415 *q++ = 'S';
416 *q++ = 'S';
417 *q++ = 'D';
418 }
419 if (st->codecpar->codec_id==AV_CODEC_ID_OPUS) {
420 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
421 if (q - data > SECTION_LENGTH - 6 - 4) {
422 err = 1;
423 break;
424 }
425
426 *q++ = 0x05; /* MPEG-2 registration descriptor*/
427 *q++ = 4;
428 *q++ = 'O';
429 *q++ = 'p';
430 *q++ = 'u';
431 *q++ = 's';
432
433 *q++ = 0x7f; /* DVB extension descriptor */
434 *q++ = 2;
435 *q++ = 0x80;
436
437 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
438 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
439 /* RTP mapping family */
440 *q++ = st->codecpar->channels;
441 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
442 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
443 static const uint8_t coupled_stream_counts[9] = {
444 1, 0, 1, 1, 2, 2, 2, 3, 3
445 };
446 static const uint8_t channel_map_a[8][8] = {
447 {0},
448 {0, 1},
449 {0, 2, 1},
450 {0, 1, 2, 3},
451 {0, 4, 1, 2, 3},
452 {0, 4, 1, 2, 3, 5},
453 {0, 4, 1, 2, 3, 5, 6},
454 {0, 6, 1, 2, 3, 4, 5, 7},
455 };
456 static const uint8_t channel_map_b[8][8] = {
457 {0},
458 {0, 1},
459 {0, 1, 2},
460 {0, 1, 2, 3},
461 {0, 1, 2, 3, 4},
462 {0, 1, 2, 3, 4, 5},
463 {0, 1, 2, 3, 4, 5, 6},
464 {0, 1, 2, 3, 4, 5, 6, 7},
465 };
466 /* Vorbis mapping family */
467
468 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
469 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
470 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
471 *q++ = st->codecpar->channels;
472 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
473 st->codecpar->extradata[20] == 0 &&
474 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
475 *q++ = st->codecpar->channels | 0x80;
476 } else {
477 /* Unsupported, could write an extended descriptor here */
478 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
479 *q++ = 0xff;
480 }
481 } else {
482 /* Unsupported */
483 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
484 *q++ = 0xff;
485 }
486 } else if (st->codecpar->channels <= 2) {
487 /* Assume RTP mapping family */
488 *q++ = st->codecpar->channels;
489 } else {
490 /* Unsupported */
491 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
492 *q++ = 0xff;
493 }
494 }
495
496 if (lang) {
497 char *p;
498 char *next = lang->value;
499 uint8_t *len_ptr;
500
501 *q++ = 0x0a; /* ISO 639 language descriptor */
502 len_ptr = q++;
503 *len_ptr = 0;
504
505 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
506 if (q - data > SECTION_LENGTH - 4) {
507 err = 1;
508 break;
509 }
510 next = strchr(p, ',');
511 if (strlen(p) != 3 && (!next || next != p + 3))
512 continue; /* not a 3-letter code */
513
514 *q++ = *p++;
515 *q++ = *p++;
516 *q++ = *p++;
517
518 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
519 *q++ = 0x01;
520 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
521 *q++ = 0x02;
522 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
523 *q++ = 0x03;
524 else
525 *q++ = 0; /* undefined type */
526
527 *len_ptr += 4;
528 }
529
530 if (*len_ptr == 0)
531 q -= 2; /* no language codes were written */
532 }
533 break;
534 case AVMEDIA_TYPE_SUBTITLE:
535 {
536 const char default_language[] = "und";
537 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
538
539 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
540 uint8_t *len_ptr;
541 int extradata_copied = 0;
542
543 *q++ = 0x59; /* subtitling_descriptor */
544 len_ptr = q++;
545
546 while (strlen(language) >= 3) {
547 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
548 err = 1;
549 break;
550 }
551 *q++ = *language++;
552 *q++ = *language++;
553 *q++ = *language++;
554 /* Skip comma */
555 if (*language != '\0')
556 language++;
557
558 if (st->codecpar->extradata_size - extradata_copied >= 5) {
559 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
560 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
561 extradata_copied += 5;
562 q += 4;
563 } else {
564 /* subtitling_type:
565 * 0x10 - normal with no monitor aspect ratio criticality
566 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
567 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
568 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
569 /* support of old 4-byte extradata format */
570 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
571 extradata_copied += 4;
572 q += 4;
573 } else {
574 put16(&q, 1); /* composition_page_id */
575 put16(&q, 1); /* ancillary_page_id */
576 }
577 }
578 }
579
580 *len_ptr = q - len_ptr - 1;
581 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
582 uint8_t *len_ptr = NULL;
583 int extradata_copied = 0;
584
585 /* The descriptor tag. teletext_descriptor */
586 *q++ = 0x56;
587 len_ptr = q++;
588
589 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
590 *q++ = *language++;
591 *q++ = *language++;
592 *q++ = *language++;
593 /* Skip comma */
594 if (*language != '\0')
595 language++;
596
597 if (st->codecpar->extradata_size - 1 > extradata_copied) {
598 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
599 extradata_copied += 2;
600 q += 2;
601 } else {
602 /* The Teletext descriptor:
603 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
604 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
605 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
606 *q++ = 0x08;
607 *q++ = 0x00;
608 }
609 }
610
611 *len_ptr = q - len_ptr - 1;
612 }
613 }
614 break;
615 case AVMEDIA_TYPE_VIDEO:
616 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
617 *q++ = 0x05; /*MPEG-2 registration descriptor*/
618 *q++ = 4;
619 *q++ = 'd';
620 *q++ = 'r';
621 *q++ = 'a';
622 *q++ = 'c';
623 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
624 *q++ = 0x05; /*MPEG-2 registration descriptor*/
625 *q++ = 4;
626 *q++ = 'V';
627 *q++ = 'C';
628 *q++ = '-';
629 *q++ = '1';
630 }
631 break;
632 case AVMEDIA_TYPE_DATA:
633 if (st->codecpar->codec_id == AV_CODEC_ID_SMPTE_KLV) {
634 *q++ = 0x05; /* MPEG-2 registration descriptor */
635 *q++ = 4;
636 *q++ = 'K';
637 *q++ = 'L';
638 *q++ = 'V';
639 *q++ = 'A';
640 } else if (st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
641 const char *tag = "ID3 ";
642 *q++ = 0x26; /* metadata descriptor */
643 *q++ = 13;
644 put16(&q, 0xffff); /* metadata application format */
645 putstr8(&q, tag, 0);
646 *q++ = 0xff; /* metadata format */
647 putstr8(&q, tag, 0);
648 *q++ = 0; /* metadata service ID */
649 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
650 }
651 break;
652 }
653
654 val = 0xf000 | (q - desc_length_ptr - 2);
655 desc_length_ptr[0] = val >> 8;
656 desc_length_ptr[1] = val;
657 }
658
659 if (err)
660 av_log(s, AV_LOG_ERROR,
661 "The PMT section cannot fit stream %d and all following streams.\n"
662 "Try reducing the number of languages in the audio streams "
663 "or the total number of streams.\n", i);
664
665 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
666 data, q - data);
667 return 0;
668}
669
670static void mpegts_write_sdt(AVFormatContext *s)
671{
672 MpegTSWrite *ts = s->priv_data;
673 MpegTSService *service;
674 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
675 int i, running_status, free_ca_mode, val;
676
677 q = data;
678 put16(&q, ts->onid);
679 *q++ = 0xff;
680 for (i = 0; i < ts->nb_services; i++) {
681 service = ts->services[i];
682 put16(&q, service->sid);
683 *q++ = 0xfc | 0x00; /* currently no EIT info */
684 desc_list_len_ptr = q;
685 q += 2;
686 running_status = 4; /* running */
687 free_ca_mode = 0;
688
689 /* write only one descriptor for the service name and provider */
690 *q++ = 0x48;
691 desc_len_ptr = q;
692 q++;
693 *q++ = ts->service_type;
694 putstr8(&q, service->provider_name, 1);
695 putstr8(&q, service->name, 1);
696 desc_len_ptr[0] = q - desc_len_ptr - 1;
697
698 /* fill descriptor length */
699 val = (running_status << 13) | (free_ca_mode << 12) |
700 (q - desc_list_len_ptr - 2);
701 desc_list_len_ptr[0] = val >> 8;
702 desc_list_len_ptr[1] = val;
703 }
704 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
705 data, q - data);
706}
707
708static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
709 const char *provider_name,
710 const char *name)
711{
712 MpegTSService *service;
713
714 service = av_mallocz(sizeof(MpegTSService));
715 if (!service)
716 return NULL;
717 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
718 service->sid = sid;
719 service->pcr_pid = 0x1fff;
720 service->provider_name = av_strdup(provider_name);
721 service->name = av_strdup(name);
722 if (!service->provider_name || !service->name)
723 goto fail;
724 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
725 goto fail;
726
727 return service;
728fail:
729 av_freep(&service->provider_name);
730 av_freep(&service->name);
731 av_free(service);
732 return NULL;
733}
734
735static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
736{
737 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
738 ts->first_pcr;
739}
740
741static void mpegts_prefix_m2ts_header(AVFormatContext *s)
742{
743 MpegTSWrite *ts = s->priv_data;
744 if (ts->m2ts_mode) {
745 int64_t pcr = get_pcr(s->priv_data, s->pb);
746 uint32_t tp_extra_header = pcr % 0x3fffffff;
747 tp_extra_header = AV_RB32(&tp_extra_header);
748 avio_write(s->pb, (unsigned char *) &tp_extra_header,
749 sizeof(tp_extra_header));
750 }
751}
752
753static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
754{
755 AVFormatContext *ctx = s->opaque;
756 mpegts_prefix_m2ts_header(ctx);
757 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
758}
759
760static int mpegts_init(AVFormatContext *s)
761{
762 MpegTSWrite *ts = s->priv_data;
763 MpegTSWriteStream *ts_st;
764 MpegTSService *service;
765 AVStream *st, *pcr_st = NULL;
766 AVDictionaryEntry *title, *provider;
767 int i, j;
768 const char *service_name;
769 const char *provider_name;
770 int *pids;
771 int ret;
772
773 if (s->max_delay < 0) /* Not set by the caller */
774 s->max_delay = 0;
775
776 // round up to a whole number of TS packets
777 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
778
779 ts->tsid = ts->transport_stream_id;
780 ts->onid = ts->original_network_id;
781 if (!s->nb_programs) {
782 /* allocate a single DVB service */
783 title = av_dict_get(s->metadata, "service_name", NULL, 0);
784 if (!title)
785 title = av_dict_get(s->metadata, "title", NULL, 0);
786 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
787 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
788 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
789 service = mpegts_add_service(ts, ts->service_id,
790 provider_name, service_name);
791
792 if (!service)
793 return AVERROR(ENOMEM);
794
795 service->pmt.write_packet = section_write_packet;
796 service->pmt.opaque = s;
797 service->pmt.cc = 15;
798 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
799 } else {
800 for (i = 0; i < s->nb_programs; i++) {
801 AVProgram *program = s->programs[i];
802 title = av_dict_get(program->metadata, "service_name", NULL, 0);
803 if (!title)
804 title = av_dict_get(program->metadata, "title", NULL, 0);
805 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
806 provider = av_dict_get(program->metadata, "service_provider", NULL, 0);
807 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
808 service = mpegts_add_service(ts, program->id,
809 provider_name, service_name);
810
811 if (!service)
812 return AVERROR(ENOMEM);
813
814 service->pmt.write_packet = section_write_packet;
815 service->pmt.opaque = s;
816 service->pmt.cc = 15;
817 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
818 service->program = program;
819 }
820 }
821
822 ts->pat.pid = PAT_PID;
823 /* Initialize at 15 so that it wraps and is equal to 0 for the
824 * first packet we write. */
825 ts->pat.cc = 15;
826 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
827 ts->pat.write_packet = section_write_packet;
828 ts->pat.opaque = s;
829
830 ts->sdt.pid = SDT_PID;
831 ts->sdt.cc = 15;
832 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
833 ts->sdt.write_packet = section_write_packet;
834 ts->sdt.opaque = s;
835
836 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
837 if (!pids) {
838 ret = AVERROR(ENOMEM);
839 goto fail;
840 }
841
842 /* assign pids to each stream */
843 for (i = 0; i < s->nb_streams; i++) {
844 AVProgram *program;
845 st = s->streams[i];
846
847 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
848 if (!ts_st) {
849 ret = AVERROR(ENOMEM);
850 goto fail;
851 }
852 st->priv_data = ts_st;
853
854 ts_st->user_tb = st->time_base;
855 avpriv_set_pts_info(st, 33, 1, 90000);
856
857 ts_st->payload = av_mallocz(ts->pes_payload_size);
858 if (!ts_st->payload) {
859 ret = AVERROR(ENOMEM);
860 goto fail;
861 }
862
863 program = av_find_program_from_stream(s, NULL, i);
864 if (program) {
865 for (j = 0; j < ts->nb_services; j++) {
866 if (ts->services[j]->program == program) {
867 service = ts->services[j];
868 break;
869 }
870 }
871 }
872
873 ts_st->service = service;
874 /* MPEG pid values < 16 are reserved. Applications which set st->id in
875 * this range are assigned a calculated pid. */
876 if (st->id < 16) {
877 ts_st->pid = ts->start_pid + i;
878 } else if (st->id < 0x1FFF) {
879 ts_st->pid = st->id;
880 } else {
881 av_log(s, AV_LOG_ERROR,
882 "Invalid stream id %d, must be less than 8191\n", st->id);
883 ret = AVERROR(EINVAL);
884 goto fail;
885 }
886 if (ts_st->pid == service->pmt.pid) {
887 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
888 ret = AVERROR(EINVAL);
889 goto fail;
890 }
891 for (j = 0; j < i; j++) {
892 if (pids[j] == ts_st->pid) {
893 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
894 ret = AVERROR(EINVAL);
895 goto fail;
896 }
897 }
898 pids[i] = ts_st->pid;
899 ts_st->payload_pts = AV_NOPTS_VALUE;
900 ts_st->payload_dts = AV_NOPTS_VALUE;
901 ts_st->first_pts_check = 1;
902 ts_st->cc = 15;
903 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
904 /* update PCR pid by using the first video stream */
905 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
906 service->pcr_pid == 0x1fff) {
907 service->pcr_pid = ts_st->pid;
908 pcr_st = st;
909 }
910 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
911 st->codecpar->extradata_size > 0) {
912 AVStream *ast;
913 ts_st->amux = avformat_alloc_context();
914 if (!ts_st->amux) {
915 ret = AVERROR(ENOMEM);
916 goto fail;
917 }
918 ts_st->amux->oformat =
919 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
920 NULL, NULL);
921 if (!ts_st->amux->oformat) {
922 ret = AVERROR(EINVAL);
923 goto fail;
924 }
925 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
926 ret = AVERROR(ENOMEM);
927 goto fail;
928 }
929 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
930 if (ret != 0)
931 goto fail;
932 ast->time_base = st->time_base;
933 ret = avformat_write_header(ts_st->amux, NULL);
934 if (ret < 0)
935 goto fail;
936 }
937 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
938 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
939 }
940 }
941
942 av_freep(&pids);
943
944 /* if no video stream, use the first stream as PCR */
945 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
946 pcr_st = s->streams[0];
947 ts_st = pcr_st->priv_data;
948 service->pcr_pid = ts_st->pid;
949 } else
950 ts_st = pcr_st->priv_data;
951
952 if (ts->mux_rate > 1) {
953 service->pcr_packet_period = (int64_t)ts->mux_rate * ts->pcr_period /
954 (TS_PACKET_SIZE * 8 * 1000);
955 ts->sdt_packet_period = (int64_t)ts->mux_rate * SDT_RETRANS_TIME /
956 (TS_PACKET_SIZE * 8 * 1000);
957 ts->pat_packet_period = (int64_t)ts->mux_rate * PAT_RETRANS_TIME /
958 (TS_PACKET_SIZE * 8 * 1000);
959
960 if (ts->copyts < 1)
961 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
962 } else {
963 /* Arbitrary values, PAT/PMT will also be written on video key frames */
964 ts->sdt_packet_period = 200;
965 ts->pat_packet_period = 40;
966 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
967 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
968 if (!frame_size) {
969 av_log(s, AV_LOG_WARNING, "frame size not set\n");
970 service->pcr_packet_period =
971 pcr_st->codecpar->sample_rate / (10 * 512);
972 } else {
973 service->pcr_packet_period =
974 pcr_st->codecpar->sample_rate / (10 * frame_size);
975 }
976 } else {
977 // max delta PCR 0.1s
978 // TODO: should be avg_frame_rate
979 service->pcr_packet_period =
980 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
981 }
982 if (!service->pcr_packet_period)
983 service->pcr_packet_period = 1;
984 }
985
986 ts->last_pat_ts = AV_NOPTS_VALUE;
987 ts->last_sdt_ts = AV_NOPTS_VALUE;
988 // The user specified a period, use only it
989 if (ts->pat_period < INT_MAX/2) {
990 ts->pat_packet_period = INT_MAX;
991 }
992 if (ts->sdt_period < INT_MAX/2) {
993 ts->sdt_packet_period = INT_MAX;
994 }
995
996 // output a PCR as soon as possible
997 service->pcr_packet_count = service->pcr_packet_period;
998 ts->pat_packet_count = ts->pat_packet_period - 1;
999 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1000
1001 if (ts->mux_rate == 1)
1002 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1003 else
1004 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1005 av_log(s, AV_LOG_VERBOSE,
1006 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
1007 service->pcr_packet_period,
1008 ts->sdt_packet_period, ts->pat_packet_period);
1009
1010 if (ts->m2ts_mode == -1) {
1011 if (av_match_ext(s->filename, "m2ts")) {
1012 ts->m2ts_mode = 1;
1013 } else {
1014 ts->m2ts_mode = 0;
1015 }
1016 }
1017
1018 return 0;
1019
1020fail:
1021 av_freep(&pids);
1022 return ret;
1023}
1024
1025/* send SDT, PAT and PMT tables regularly */
1026static void retransmit_si_info(AVFormatContext *s, int force_pat, int64_t dts)
1027{
1028 MpegTSWrite *ts = s->priv_data;
1029 int i;
1030
1031 if (++ts->sdt_packet_count == ts->sdt_packet_period ||
1032 (dts != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1033 (dts != AV_NOPTS_VALUE && dts - ts->last_sdt_ts >= ts->sdt_period*90000.0)
1034 ) {
1035 ts->sdt_packet_count = 0;
1036 if (dts != AV_NOPTS_VALUE)
1037 ts->last_sdt_ts = FFMAX(dts, ts->last_sdt_ts);
1038 mpegts_write_sdt(s);
1039 }
1040 if (++ts->pat_packet_count == ts->pat_packet_period ||
1041 (dts != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1042 (dts != AV_NOPTS_VALUE && dts - ts->last_pat_ts >= ts->pat_period*90000.0) ||
1043 force_pat) {
1044 ts->pat_packet_count = 0;
1045 if (dts != AV_NOPTS_VALUE)
1046 ts->last_pat_ts = FFMAX(dts, ts->last_pat_ts);
1047 mpegts_write_pat(s);
1048 for (i = 0; i < ts->nb_services; i++)
1049 mpegts_write_pmt(s, ts->services[i]);
1050 }
1051}
1052
1053static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1054{
1055 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1056
1057 *buf++ = pcr_high >> 25;
1058 *buf++ = pcr_high >> 17;
1059 *buf++ = pcr_high >> 9;
1060 *buf++ = pcr_high >> 1;
1061 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1062 *buf++ = pcr_low;
1063
1064 return 6;
1065}
1066
1067/* Write a single null transport stream packet */
1068static void mpegts_insert_null_packet(AVFormatContext *s)
1069{
1070 uint8_t *q;
1071 uint8_t buf[TS_PACKET_SIZE];
1072
1073 q = buf;
1074 *q++ = 0x47;
1075 *q++ = 0x00 | 0x1f;
1076 *q++ = 0xff;
1077 *q++ = 0x10;
1078 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1079 mpegts_prefix_m2ts_header(s);
1080 avio_write(s->pb, buf, TS_PACKET_SIZE);
1081}
1082
1083/* Write a single transport stream packet with a PCR and no payload */
1084static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1085{
1086 MpegTSWrite *ts = s->priv_data;
1087 MpegTSWriteStream *ts_st = st->priv_data;
1088 uint8_t *q;
1089 uint8_t buf[TS_PACKET_SIZE];
1090
1091 q = buf;
1092 *q++ = 0x47;
1093 *q++ = ts_st->pid >> 8;
1094 *q++ = ts_st->pid;
1095 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1096 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1097 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1098 *q++ = 0x10; /* Adaptation flags: PCR present */
1099 if (ts_st->discontinuity) {
1100 q[-1] |= 0x80;
1101 ts_st->discontinuity = 0;
1102 }
1103
1104 /* PCR coded into 6 bytes */
1105 q += write_pcr_bits(q, get_pcr(ts, s->pb));
1106
1107 /* stuffing bytes */
1108 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1109 mpegts_prefix_m2ts_header(s);
1110 avio_write(s->pb, buf, TS_PACKET_SIZE);
1111}
1112
1113static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1114{
1115 int val;
1116
1117 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1118 *q++ = val;
1119 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1120 *q++ = val >> 8;
1121 *q++ = val;
1122 val = (((pts) & 0x7fff) << 1) | 1;
1123 *q++ = val >> 8;
1124 *q++ = val;
1125}
1126
1127/* Set an adaptation field flag in an MPEG-TS packet*/
1128static void set_af_flag(uint8_t *pkt, int flag)
1129{
1130 // expect at least one flag to set
1131 av_assert0(flag);
1132
1133 if ((pkt[3] & 0x20) == 0) {
1134 // no AF yet, set adaptation field flag
1135 pkt[3] |= 0x20;
1136 // 1 byte length, no flags
1137 pkt[4] = 1;
1138 pkt[5] = 0;
1139 }
1140 pkt[5] |= flag;
1141}
1142
1143/* Extend the adaptation field by size bytes */
1144static void extend_af(uint8_t *pkt, int size)
1145{
1146 // expect already existing adaptation field
1147 av_assert0(pkt[3] & 0x20);
1148 pkt[4] += size;
1149}
1150
1151/* Get a pointer to MPEG-TS payload (right after TS packet header) */
1152static uint8_t *get_ts_payload_start(uint8_t *pkt)
1153{
1154 if (pkt[3] & 0x20)
1155 return pkt + 5 + pkt[4];
1156 else
1157 return pkt + 4;
1158}
1159
1160/* Add a PES header to the front of the payload, and segment into an integer
1161 * number of TS packets. The final TS packet is padded using an oversized
1162 * adaptation header to exactly fill the last TS packet.
1163 * NOTE: 'payload' contains a complete PES payload. */
1164static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1165 const uint8_t *payload, int payload_size,
1166 int64_t pts, int64_t dts, int key, int stream_id)
1167{
1168 MpegTSWriteStream *ts_st = st->priv_data;
1169 MpegTSWrite *ts = s->priv_data;
1170 uint8_t buf[TS_PACKET_SIZE];
1171 uint8_t *q;
1172 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1173 int afc_len, stuffing_len;
1174 int64_t pcr = -1; /* avoid warning */
1175 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1176 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1177
1178 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1179 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1180 force_pat = 1;
1181 }
1182
1183 is_start = 1;
1184 while (payload_size > 0) {
1185 retransmit_si_info(s, force_pat, dts);
1186 force_pat = 0;
1187
1188 write_pcr = 0;
1189 if (ts_st->pid == ts_st->service->pcr_pid) {
1190 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
1191 ts_st->service->pcr_packet_count++;
1192 if (ts_st->service->pcr_packet_count >=
1193 ts_st->service->pcr_packet_period) {
1194 ts_st->service->pcr_packet_count = 0;
1195 write_pcr = 1;
1196 }
1197 }
1198
1199 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
1200 (dts - get_pcr(ts, s->pb) / 300) > delay) {
1201 /* pcr insert gets priority over null packet insert */
1202 if (write_pcr)
1203 mpegts_insert_pcr_only(s, st);
1204 else
1205 mpegts_insert_null_packet(s);
1206 /* recalculate write_pcr and possibly retransmit si_info */
1207 continue;
1208 }
1209
1210 /* prepare packet header */
1211 q = buf;
1212 *q++ = 0x47;
1213 val = ts_st->pid >> 8;
1214 if (is_start)
1215 val |= 0x40;
1216 *q++ = val;
1217 *q++ = ts_st->pid;
1218 ts_st->cc = ts_st->cc + 1 & 0xf;
1219 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1220 if (ts_st->discontinuity) {
1221 set_af_flag(buf, 0x80);
1222 q = get_ts_payload_start(buf);
1223 ts_st->discontinuity = 0;
1224 }
1225 if (key && is_start && pts != AV_NOPTS_VALUE) {
1226 // set Random Access for key frames
1227 if (ts_st->pid == ts_st->service->pcr_pid)
1228 write_pcr = 1;
1229 set_af_flag(buf, 0x40);
1230 q = get_ts_payload_start(buf);
1231 }
1232 if (write_pcr) {
1233 set_af_flag(buf, 0x10);
1234 q = get_ts_payload_start(buf);
1235 // add 11, pcr references the last byte of program clock reference base
1236 if (ts->mux_rate > 1)
1237 pcr = get_pcr(ts, s->pb);
1238 else
1239 pcr = (dts - delay) * 300;
1240 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1241 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1242 extend_af(buf, write_pcr_bits(q, pcr));
1243 q = get_ts_payload_start(buf);
1244 }
1245 if (is_start) {
1246 int pes_extension = 0;
1247 int pes_header_stuffing_bytes = 0;
1248 /* write PES header */
1249 *q++ = 0x00;
1250 *q++ = 0x00;
1251 *q++ = 0x01;
1252 is_dvb_subtitle = 0;
1253 is_dvb_teletext = 0;
1254 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1255 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1256 *q++ = 0xfd;
1257 else
1258 *q++ = 0xe0;
1259 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1260 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1261 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1262 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1263 *q++ = 0xc0;
1264 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1265 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1266 ts->m2ts_mode) {
1267 *q++ = 0xfd;
1268 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1269 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1270 *q++ = 0xbd;
1271 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1272 *q++ = stream_id != -1 ? stream_id : 0xfc;
1273
1274 if (stream_id == 0xbd) /* asynchronous KLV */
1275 pts = dts = AV_NOPTS_VALUE;
1276 } else {
1277 *q++ = 0xbd;
1278 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1279 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1280 is_dvb_subtitle = 1;
1281 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1282 is_dvb_teletext = 1;
1283 }
1284 }
1285 }
1286 header_len = 0;
1287 flags = 0;
1288 if (pts != AV_NOPTS_VALUE) {
1289 header_len += 5;
1290 flags |= 0x80;
1291 }
1292 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1293 header_len += 5;
1294 flags |= 0x40;
1295 }
1296 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1297 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1298 /* set PES_extension_flag */
1299 pes_extension = 1;
1300 flags |= 0x01;
1301
1302 /* One byte for PES2 extension flag +
1303 * one byte for extension length +
1304 * one byte for extension id */
1305 header_len += 3;
1306 }
1307 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1308 * otherwise it will not play sound on blu-ray
1309 */
1310 if (ts->m2ts_mode &&
1311 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1312 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1313 /* set PES_extension_flag */
1314 pes_extension = 1;
1315 flags |= 0x01;
1316 header_len += 3;
1317 }
1318 if (is_dvb_teletext) {
1319 pes_header_stuffing_bytes = 0x24 - header_len;
1320 header_len = 0x24;
1321 }
1322 len = payload_size + header_len + 3;
1323 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1324 if (is_dvb_subtitle) {
1325 len += 3;
1326 payload_size++;
1327 }
1328 if (len > 0xffff)
1329 len = 0;
1330 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1331 len = 0;
1332 }
1333 *q++ = len >> 8;
1334 *q++ = len;
1335 val = 0x80;
1336 /* data alignment indicator is required for subtitle and data streams */
1337 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1338 val |= 0x04;
1339 *q++ = val;
1340 *q++ = flags;
1341 *q++ = header_len;
1342 if (pts != AV_NOPTS_VALUE) {
1343 write_pts(q, flags >> 6, pts);
1344 q += 5;
1345 }
1346 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1347 write_pts(q, 1, dts);
1348 q += 5;
1349 }
1350 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1351 flags = 0x01; /* set PES_extension_flag_2 */
1352 *q++ = flags;
1353 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1354 /* Set the stream ID extension flag bit to 0 and
1355 * write the extended stream ID. */
1356 *q++ = 0x00 | 0x60;
1357 }
1358 /* For Blu-ray AC3 Audio Setting extended flags */
1359 if (ts->m2ts_mode &&
1360 pes_extension &&
1361 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1362 flags = 0x01; /* set PES_extension_flag_2 */
1363 *q++ = flags;
1364 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1365 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1366 }
1367
1368
1369 if (is_dvb_subtitle) {
1370 /* First two fields of DVB subtitles PES data:
1371 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1372 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1373 *q++ = 0x20;
1374 *q++ = 0x00;
1375 }
1376 if (is_dvb_teletext) {
1377 memset(q, 0xff, pes_header_stuffing_bytes);
1378 q += pes_header_stuffing_bytes;
1379 }
1380 is_start = 0;
1381 }
1382 /* header size */
1383 header_len = q - buf;
1384 /* data len */
1385 len = TS_PACKET_SIZE - header_len;
1386 if (len > payload_size)
1387 len = payload_size;
1388 stuffing_len = TS_PACKET_SIZE - header_len - len;
1389 if (stuffing_len > 0) {
1390 /* add stuffing with AFC */
1391 if (buf[3] & 0x20) {
1392 /* stuffing already present: increase its size */
1393 afc_len = buf[4] + 1;
1394 memmove(buf + 4 + afc_len + stuffing_len,
1395 buf + 4 + afc_len,
1396 header_len - (4 + afc_len));
1397 buf[4] += stuffing_len;
1398 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1399 } else {
1400 /* add stuffing */
1401 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1402 buf[3] |= 0x20;
1403 buf[4] = stuffing_len - 1;
1404 if (stuffing_len >= 2) {
1405 buf[5] = 0x00;
1406 memset(buf + 6, 0xff, stuffing_len - 2);
1407 }
1408 }
1409 }
1410
1411 if (is_dvb_subtitle && payload_size == len) {
1412 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1413 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1414 } else {
1415 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1416 }
1417
1418 payload += len;
1419 payload_size -= len;
1420 mpegts_prefix_m2ts_header(s);
1421 avio_write(s->pb, buf, TS_PACKET_SIZE);
1422 }
1423 ts_st->prev_payload_key = key;
1424}
1425
1426int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1427{
1428 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1429 if (!st->nb_frames) {
1430 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1431 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1432 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1433 return AVERROR_INVALIDDATA;
1434 }
1435 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1436 if (pkt->size)
1437 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1438 av_log(s, AV_LOG_WARNING, "\n");
1439 }
1440 return 0;
1441}
1442
1443static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1444{
1445 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1446 if (!st->nb_frames) {
1447 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1448 return AVERROR_PATCHWELCOME;
1449 }
1450 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1451 if (pkt->size)
1452 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1453 av_log(s, AV_LOG_WARNING, "\n");
1454 }
1455 return 0;
1456}
1457
1458/* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1459 * Released under the LGPL v2.1+, written by
1460 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1461 */
1462static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1463{
1464 static const int durations[32] = {
1465 480, 960, 1920, 2880, /* Silk NB */
1466 480, 960, 1920, 2880, /* Silk MB */
1467 480, 960, 1920, 2880, /* Silk WB */
1468 480, 960, /* Hybrid SWB */
1469 480, 960, /* Hybrid FB */
1470 120, 240, 480, 960, /* CELT NB */
1471 120, 240, 480, 960, /* CELT NB */
1472 120, 240, 480, 960, /* CELT NB */
1473 120, 240, 480, 960, /* CELT NB */
1474 };
1475 int toc, frame_duration, nframes, duration;
1476
1477 if (pkt->size < 1)
1478 return 0;
1479
1480 toc = pkt->data[0];
1481
1482 frame_duration = durations[toc >> 3];
1483 switch (toc & 3) {
1484 case 0:
1485 nframes = 1;
1486 break;
1487 case 1:
1488 nframes = 2;
1489 break;
1490 case 2:
1491 nframes = 2;
1492 break;
1493 case 3:
1494 if (pkt->size < 2)
1495 return 0;
1496 nframes = pkt->data[1] & 63;
1497 break;
1498 }
1499
1500 duration = nframes * frame_duration;
1501 if (duration > 5760) {
1502 av_log(s, AV_LOG_WARNING,
1503 "Opus packet duration > 120 ms, invalid");
1504 return 0;
1505 }
1506
1507 return duration;
1508}
1509
1510static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1511{
1512 AVStream *st = s->streams[pkt->stream_index];
1513 int size = pkt->size;
1514 uint8_t *buf = pkt->data;
1515 uint8_t *data = NULL;
1516 MpegTSWrite *ts = s->priv_data;
1517 MpegTSWriteStream *ts_st = st->priv_data;
1518 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1519 int64_t dts = pkt->dts, pts = pkt->pts;
1520 int opus_samples = 0;
1521 int side_data_size;
1522 char *side_data = NULL;
1523 int stream_id = -1;
1524
1525 side_data = av_packet_get_side_data(pkt,
1526 AV_PKT_DATA_MPEGTS_STREAM_ID,
1527 &side_data_size);
1528 if (side_data)
1529 stream_id = side_data[0];
1530
1531 if (ts->reemit_pat_pmt) {
1532 av_log(s, AV_LOG_WARNING,
1533 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1534 ts->reemit_pat_pmt = 0;
1535 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1536 }
1537
1538 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1539 ts->pat_packet_count = ts->pat_packet_period - 1;
1540 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1541 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1542 }
1543
1544 if (ts->copyts < 1) {
1545 if (pts != AV_NOPTS_VALUE)
1546 pts += delay;
1547 if (dts != AV_NOPTS_VALUE)
1548 dts += delay;
1549 }
1550
1551 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1552 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1553 return AVERROR_INVALIDDATA;
1554 }
1555 ts_st->first_pts_check = 0;
1556
1557 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1558 const uint8_t *p = buf, *buf_end = p + size;
1559 uint32_t state = -1;
1560 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1561 int ret = ff_check_h264_startcode(s, st, pkt);
1562 if (ret < 0)
1563 return ret;
1564
1565 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1566 extradd = 0;
1567
1568 do {
1569 p = avpriv_find_start_code(p, buf_end, &state);
1570 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1571 if ((state & 0x1f) == 7)
1572 extradd = 0;
1573 } while (p < buf_end && (state & 0x1f) != 9 &&
1574 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1575
1576 if ((state & 0x1f) != 5)
1577 extradd = 0;
1578 if ((state & 0x1f) != 9) { // AUD NAL
1579 data = av_malloc(pkt->size + 6 + extradd);
1580 if (!data)
1581 return AVERROR(ENOMEM);
1582 memcpy(data + 6, st->codecpar->extradata, extradd);
1583 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1584 AV_WB32(data, 0x00000001);
1585 data[4] = 0x09;
1586 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1587 buf = data;
1588 size = pkt->size + 6 + extradd;
1589 }
1590 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1591 if (pkt->size < 2) {
1592 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1593 return AVERROR_INVALIDDATA;
1594 }
1595 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1596 int ret;
1597 AVPacket pkt2;
1598
1599 if (!ts_st->amux) {
1600 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1601 "and extradata missing\n");
1602 } else {
1603 av_init_packet(&pkt2);
1604 pkt2.data = pkt->data;
1605 pkt2.size = pkt->size;
1606 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1607 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1608
1609 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1610 if (ret < 0)
1611 return AVERROR(ENOMEM);
1612
1613 ret = av_write_frame(ts_st->amux, &pkt2);
1614 if (ret < 0) {
1615 ffio_free_dyn_buf(&ts_st->amux->pb);
1616 return ret;
1617 }
1618 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1619 ts_st->amux->pb = NULL;
1620 buf = data;
1621 }
1622 }
1623 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1624 const uint8_t *p = buf, *buf_end = p + size;
1625 uint32_t state = -1;
1626 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1627 int ret = check_hevc_startcode(s, st, pkt);
1628 if (ret < 0)
1629 return ret;
1630
1631 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1632 extradd = 0;
1633
1634 do {
1635 p = avpriv_find_start_code(p, buf_end, &state);
1636 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1637 if ((state & 0x7e) == 2*32)
1638 extradd = 0;
1639 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1640 (state & 0x7e) >= 2*32);
1641
1642 if ((state & 0x7e) < 2*16 && (state & 0x7e) >= 2*24)
1643 extradd = 0;
1644 if ((state & 0x7e) != 2*35) { // AUD NAL
1645 data = av_malloc(pkt->size + 7 + extradd);
1646 if (!data)
1647 return AVERROR(ENOMEM);
1648 memcpy(data + 7, st->codecpar->extradata, extradd);
1649 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1650 AV_WB32(data, 0x00000001);
1651 data[4] = 2*35;
1652 data[5] = 1;
1653 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1654 buf = data;
1655 size = pkt->size + 7 + extradd;
1656 }
1657 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1658 if (pkt->size < 2) {
1659 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1660 return AVERROR_INVALIDDATA;
1661 }
1662
1663 /* Add Opus control header */
1664 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1665 uint8_t *side_data;
1666 int side_data_size;
1667 int i, n;
1668 int ctrl_header_size;
1669 int trim_start = 0, trim_end = 0;
1670
1671 opus_samples = opus_get_packet_samples(s, pkt);
1672
1673 side_data = av_packet_get_side_data(pkt,
1674 AV_PKT_DATA_SKIP_SAMPLES,
1675 &side_data_size);
1676
1677 if (side_data && side_data_size >= 10) {
1678 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1679 }
1680
1681 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1682 if (ts_st->opus_pending_trim_start)
1683 ctrl_header_size += 2;
1684 if (trim_end)
1685 ctrl_header_size += 2;
1686
1687 data = av_malloc(ctrl_header_size);
1688 if (!data)
1689 return AVERROR(ENOMEM);
1690
1691 data[0] = 0x7f;
1692 data[1] = 0xe0;
1693 if (ts_st->opus_pending_trim_start)
1694 data[1] |= 0x10;
1695 if (trim_end)
1696 data[1] |= 0x08;
1697
1698 n = pkt->size;
1699 i = 2;
1700 do {
1701 data[i] = FFMIN(n, 255);
1702 n -= 255;
1703 i++;
1704 } while (n >= 0);
1705
1706 av_assert0(2 + pkt->size / 255 + 1 == i);
1707
1708 if (ts_st->opus_pending_trim_start) {
1709 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1710 AV_WB16(data + i, trim_start);
1711 i += 2;
1712 ts_st->opus_pending_trim_start -= trim_start;
1713 }
1714 if (trim_end) {
1715 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1716 AV_WB16(data + i, trim_end);
1717 i += 2;
1718 }
1719
1720 memcpy(data + i, pkt->data, pkt->size);
1721 buf = data;
1722 size = ctrl_header_size;
1723 } else {
1724 /* TODO: Can we get TS formatted data here? If so we will
1725 * need to count the samples of that too! */
1726 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1727 }
1728 }
1729
1730 if (pkt->dts != AV_NOPTS_VALUE) {
1731 int i;
1732 for(i=0; i<s->nb_streams; i++) {
1733 AVStream *st2 = s->streams[i];
1734 MpegTSWriteStream *ts_st2 = st2->priv_data;
1735 if ( ts_st2->payload_size
1736 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1737 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1738 ts_st2->payload_pts, ts_st2->payload_dts,
1739 ts_st2->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1740 ts_st2->payload_size = 0;
1741 }
1742 }
1743 }
1744
1745 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1746 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1747 av_compare_ts(dts - ts_st->payload_dts, st->time_base,
1748 s->max_delay, AV_TIME_BASE_Q) >= 0) ||
1749 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1750 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1751 ts_st->payload_pts, ts_st->payload_dts,
1752 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1753 ts_st->payload_size = 0;
1754 ts_st->opus_queued_samples = 0;
1755 }
1756
1757 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1758 av_assert0(!ts_st->payload_size);
1759 // for video and subtitle, write a single pes packet
1760 mpegts_write_pes(s, st, buf, size, pts, dts,
1761 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1762 ts_st->opus_queued_samples = 0;
1763 av_free(data);
1764 return 0;
1765 }
1766
1767 if (!ts_st->payload_size) {
1768 ts_st->payload_pts = pts;
1769 ts_st->payload_dts = dts;
1770 ts_st->payload_flags = pkt->flags;
1771 }
1772
1773 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1774 ts_st->payload_size += size;
1775 ts_st->opus_queued_samples += opus_samples;
1776
1777 av_free(data);
1778
1779 return 0;
1780}
1781
1782static void mpegts_write_flush(AVFormatContext *s)
1783{
1784 int i;
1785
1786 /* flush current packets */
1787 for (i = 0; i < s->nb_streams; i++) {
1788 AVStream *st = s->streams[i];
1789 MpegTSWriteStream *ts_st = st->priv_data;
1790 if (ts_st->payload_size > 0) {
1791 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1792 ts_st->payload_pts, ts_st->payload_dts,
1793 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1794 ts_st->payload_size = 0;
1795 ts_st->opus_queued_samples = 0;
1796 }
1797 }
1798}
1799
1800static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1801{
1802 if (!pkt) {
1803 mpegts_write_flush(s);
1804 return 1;
1805 } else {
1806 return mpegts_write_packet_internal(s, pkt);
1807 }
1808}
1809
1810static int mpegts_write_end(AVFormatContext *s)
1811{
1812 if (s->pb)
1813 mpegts_write_flush(s);
1814
1815 return 0;
1816}
1817
1818static void mpegts_deinit(AVFormatContext *s)
1819{
1820 MpegTSWrite *ts = s->priv_data;
1821 MpegTSService *service;
1822 int i;
1823
1824 for (i = 0; i < s->nb_streams; i++) {
1825 AVStream *st = s->streams[i];
1826 MpegTSWriteStream *ts_st = st->priv_data;
1827 if (ts_st) {
1828 av_freep(&ts_st->payload);
1829 if (ts_st->amux) {
1830 avformat_free_context(ts_st->amux);
1831 ts_st->amux = NULL;
1832 }
1833 }
1834 }
1835
1836 for (i = 0; i < ts->nb_services; i++) {
1837 service = ts->services[i];
1838 av_freep(&service->provider_name);
1839 av_freep(&service->name);
1840 av_freep(&service);
1841 }
1842 av_freep(&ts->services);
1843}
1844
1845static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
1846{
1847 int ret = 1;
1848 AVStream *st = s->streams[pkt->stream_index];
1849
1850 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1851 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1852 (AV_RB24(pkt->data) != 0x000001 ||
1853 (st->codecpar->extradata_size > 0 &&
1854 st->codecpar->extradata[0] == 1)))
1855 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
1856 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1857 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
1858 (AV_RB24(pkt->data) != 0x000001 ||
1859 (st->codecpar->extradata_size > 0 &&
1860 st->codecpar->extradata[0] == 1)))
1861 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
1862 }
1863
1864 return ret;
1865}
1866
1867static const AVOption options[] = {
1868 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1869 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1870 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1871 { "mpegts_original_network_id", "Set original_network_id field.",
1872 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1873 { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1874 { "mpegts_service_id", "Set service_id field.",
1875 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1876 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1877 { "mpegts_service_type", "Set service_type field.",
1878 offsetof(MpegTSWrite, service_type), AV_OPT_TYPE_INT,
1879 { .i64 = 0x01 }, 0x01, 0xff, AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1880 { "digital_tv", "Digital Television.",
1881 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff,
1882 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1883 { "digital_radio", "Digital Radio.",
1884 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff,
1885 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1886 { "teletext", "Teletext.",
1887 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff,
1888 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1889 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
1890 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff,
1891 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1892 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
1893 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff,
1894 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1895 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
1896 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff,
1897 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1898 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
1899 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff,
1900 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1901 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
1902 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff,
1903 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_service_type" },
1904 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1905 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1906 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1907 { "mpegts_start_pid", "Set the first pid.",
1908 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
1909 { .i64 = 0x0100 }, 0x0010, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
1910 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1911 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_BOOL,
1912 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1913 { "muxrate", NULL,
1914 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1915 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1916 { "pes_payload_size", "Minimum PES packet payload in bytes",
1917 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1918 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1919 { "mpegts_flags", "MPEG-TS muxing flags",
1920 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1921 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1922 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1923 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1924 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1925 { "latm", "Use LATM packetization for AAC",
1926 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1927 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1928 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
1929 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX,
1930 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1931 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
1932 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
1933 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1934 { "initial_discontinuity", "Mark initial packets as discontinuous",
1935 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX,
1936 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1937 // backward compatibility
1938 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1939 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1940 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1941 { "mpegts_copyts", "don't offset dts/pts",
1942 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_BOOL,
1943 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1944 { "tables_version", "set PAT, PMT and SDT version",
1945 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1946 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1947 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1948 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_BOOL,
1949 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1950 { "pcr_period", "PCR retransmission time in milliseconds",
1951 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1952 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1953 { "pat_period", "PAT/PMT retransmission time limit in seconds",
1954 offsetof(MpegTSWrite, pat_period), AV_OPT_TYPE_DOUBLE,
1955 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1956 { "sdt_period", "SDT retransmission time limit in seconds",
1957 offsetof(MpegTSWrite, sdt_period), AV_OPT_TYPE_DOUBLE,
1958 { .dbl = INT_MAX }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1959 { NULL },
1960};
1961
1962static const AVClass mpegts_muxer_class = {
1963 .class_name = "MPEGTS muxer",
1964 .item_name = av_default_item_name,
1965 .option = options,
1966 .version = LIBAVUTIL_VERSION_INT,
1967};
1968
1969AVOutputFormat ff_mpegts_muxer = {
1970 .name = "mpegts",
1971 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1972 .mime_type = "video/MP2T",
1973 .extensions = "ts,m2t,m2ts,mts",
1974 .priv_data_size = sizeof(MpegTSWrite),
1975 .audio_codec = AV_CODEC_ID_MP2,
1976 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1977 .init = mpegts_init,
1978 .write_packet = mpegts_write_packet,
1979 .write_trailer = mpegts_write_end,
1980 .deinit = mpegts_deinit,
1981 .check_bitstream = mpegts_check_bitstream,
1982 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
1983 .priv_class = &mpegts_muxer_class,
1984};
1985
generated by cgit at 2024-05-18 04:42:32 (GMT)