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/ac3_parser_internal.h"
31 #include "libavcodec/internal.h"
32
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "internal.h"
36 #include "mpegts.h"
37
38 #define PCR_TIME_BASE 27000000
39
40 /* write DVB SI sections */
41
42 #define DVB_PRIVATE_NETWORK_START 0xff01
43
44 /*********************************************/
45 /* mpegts section writer */
46
47 typedef struct MpegTSSection {
48 int pid;
49 int cc;
50 int discontinuity;
51 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
52 void *opaque;
53 } MpegTSSection;
54
55 typedef struct MpegTSService {
56 MpegTSSection pmt; /* MPEG-2 PMT table context */
57 int sid; /* service ID */
58 uint8_t name[256];
59 uint8_t provider_name[256];
60 int pcr_pid;
61 AVProgram *program;
62 } MpegTSService;
63
64 // service_type values as defined in ETSI 300 468
65 enum {
66 MPEGTS_SERVICE_TYPE_DIGITAL_TV = 0x01,
67 MPEGTS_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
68 MPEGTS_SERVICE_TYPE_TELETEXT = 0x03,
69 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO = 0x0A,
70 MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV = 0x11,
71 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV = 0x16,
72 MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV = 0x19,
73 MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV = 0x1F,
74 };
75 typedef struct MpegTSWrite {
76 const AVClass *av_class;
77 MpegTSSection pat; /* MPEG-2 PAT table */
78 MpegTSSection sdt; /* MPEG-2 SDT table context */
79 MpegTSService **services;
80 AVPacket *pkt;
81 int64_t sdt_period; /* SDT period in PCR time base */
82 int64_t pat_period; /* PAT/PMT period in PCR time base */
83 int nb_services;
84 int64_t first_pcr;
85 int first_dts_checked;
86 int64_t next_pcr;
87 int mux_rate; ///< set to 1 when VBR
88 int pes_payload_size;
89 int64_t total_size;
90
91 int transport_stream_id;
92 int original_network_id;
93 int service_id;
94 int service_type;
95
96 int pmt_start_pid;
97 int start_pid;
98 int m2ts_mode;
99 int m2ts_video_pid;
100 int m2ts_audio_pid;
101 int m2ts_pgssub_pid;
102 int m2ts_textsub_pid;
103
104 int pcr_period_ms;
105 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
106 #define MPEGTS_FLAG_AAC_LATM 0x02
107 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
108 #define MPEGTS_FLAG_SYSTEM_B 0x08
109 #define MPEGTS_FLAG_DISCONT 0x10
110 int flags;
111 int copyts;
112 int tables_version;
113 int64_t pat_period_us;
114 int64_t sdt_period_us;
115 int64_t last_pat_ts;
116 int64_t last_sdt_ts;
117
118 int omit_video_pes_length;
119 } MpegTSWrite;
120
121 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
122 #define DEFAULT_PES_HEADER_FREQ 16
123 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
124
125 /* The section length is 12 bits. The first 2 are set to 0, the remaining
126 * 10 bits should not exceed 1021. */
127 #define SECTION_LENGTH 1020
128
129 /* NOTE: 4 bytes must be left at the end for the crc32 */
mpegts_write_section(MpegTSSection * s,uint8_t * buf,int len)130 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
131 {
132 unsigned int crc;
133 unsigned char packet[TS_PACKET_SIZE];
134 const unsigned char *buf_ptr;
135 unsigned char *q;
136 int first, b, len1, left;
137
138 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
139 -1, buf, len - 4));
140
141 buf[len - 4] = (crc >> 24) & 0xff;
142 buf[len - 3] = (crc >> 16) & 0xff;
143 buf[len - 2] = (crc >> 8) & 0xff;
144 buf[len - 1] = crc & 0xff;
145
146 /* send each packet */
147 buf_ptr = buf;
148 while (len > 0) {
149 first = buf == buf_ptr;
150 q = packet;
151 *q++ = 0x47;
152 b = s->pid >> 8;
153 if (first)
154 b |= 0x40;
155 *q++ = b;
156 *q++ = s->pid;
157 s->cc = s->cc + 1 & 0xf;
158 *q++ = 0x10 | s->cc;
159 if (s->discontinuity) {
160 q[-1] |= 0x20;
161 *q++ = 1;
162 *q++ = 0x80;
163 s->discontinuity = 0;
164 }
165 if (first)
166 *q++ = 0; /* 0 offset */
167 len1 = TS_PACKET_SIZE - (q - packet);
168 if (len1 > len)
169 len1 = len;
170 memcpy(q, buf_ptr, len1);
171 q += len1;
172 /* add known padding data */
173 left = TS_PACKET_SIZE - (q - packet);
174 if (left > 0)
175 memset(q, 0xff, left);
176
177 s->write_packet(s, packet);
178
179 buf_ptr += len1;
180 len -= len1;
181 }
182 }
183
put16(uint8_t ** q_ptr,int val)184 static inline void put16(uint8_t **q_ptr, int val)
185 {
186 uint8_t *q;
187 q = *q_ptr;
188 *q++ = val >> 8;
189 *q++ = val;
190 *q_ptr = q;
191 }
192
mpegts_write_section1(MpegTSSection * s,int tid,int id,int version,int sec_num,int last_sec_num,uint8_t * buf,int len)193 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
194 int version, int sec_num, int last_sec_num,
195 uint8_t *buf, int len)
196 {
197 uint8_t section[1024], *q;
198 unsigned int tot_len;
199 /* reserved_future_use field must be set to 1 for SDT */
200 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
201
202 tot_len = 3 + 5 + len + 4;
203 /* check if not too big */
204 if (tot_len > 1024)
205 return AVERROR_INVALIDDATA;
206
207 q = section;
208 *q++ = tid;
209 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
210 put16(&q, id);
211 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
212 *q++ = sec_num;
213 *q++ = last_sec_num;
214 memcpy(q, buf, len);
215
216 mpegts_write_section(s, section, tot_len);
217 return 0;
218 }
219
220 /*********************************************/
221 /* mpegts writer */
222
223 #define DEFAULT_PROVIDER_NAME "FFmpeg"
224 #define DEFAULT_SERVICE_NAME "Service"
225
226 /* we retransmit the SI info at this rate */
227 #define SDT_RETRANS_TIME 500
228 #define PAT_RETRANS_TIME 100
229 #define PCR_RETRANS_TIME 20
230
231 typedef struct MpegTSWriteStream {
232 int pid; /* stream associated pid */
233 int cc;
234 int discontinuity;
235 int payload_size;
236 int first_timestamp_checked; ///< first pts/dts 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 int data_st_warning;
244
245 int64_t pcr_period; /* PCR period in PCR time base */
246 int64_t last_pcr;
247
248 /* For Opus */
249 int opus_queued_samples;
250 int opus_pending_trim_start;
251
252 DVBAC3Descriptor *dvb_ac3_desc;
253 } MpegTSWriteStream;
254
mpegts_write_pat(AVFormatContext * s)255 static void mpegts_write_pat(AVFormatContext *s)
256 {
257 MpegTSWrite *ts = s->priv_data;
258 MpegTSService *service;
259 uint8_t data[SECTION_LENGTH], *q;
260 int i;
261
262 q = data;
263 for (i = 0; i < ts->nb_services; i++) {
264 service = ts->services[i];
265 put16(&q, service->sid);
266 put16(&q, 0xe000 | service->pmt.pid);
267 }
268 mpegts_write_section1(&ts->pat, PAT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
269 data, q - data);
270 }
271
putbuf(uint8_t ** q_ptr,const uint8_t * buf,size_t len)272 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
273 {
274 memcpy(*q_ptr, buf, len);
275 *q_ptr += len;
276 }
277
put_registration_descriptor(uint8_t ** q_ptr,uint32_t tag)278 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
279 {
280 uint8_t *q = *q_ptr;
281 *q++ = REGISTRATION_DESCRIPTOR;
282 *q++ = 4;
283 *q++ = tag;
284 *q++ = tag >> 8;
285 *q++ = tag >> 16;
286 *q++ = tag >> 24;
287 *q_ptr = q;
288 }
289
get_dvb_stream_type(AVFormatContext * s,AVStream * st)290 static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
291 {
292 MpegTSWrite *ts = s->priv_data;
293 MpegTSWriteStream *ts_st = st->priv_data;
294 int stream_type;
295
296 switch (st->codecpar->codec_id) {
297 case AV_CODEC_ID_MPEG1VIDEO:
298 case AV_CODEC_ID_MPEG2VIDEO:
299 stream_type = STREAM_TYPE_VIDEO_MPEG2;
300 break;
301 case AV_CODEC_ID_MPEG4:
302 stream_type = STREAM_TYPE_VIDEO_MPEG4;
303 break;
304 case AV_CODEC_ID_H264:
305 stream_type = STREAM_TYPE_VIDEO_H264;
306 break;
307 case AV_CODEC_ID_HEVC:
308 stream_type = STREAM_TYPE_VIDEO_HEVC;
309 break;
310 case AV_CODEC_ID_CAVS:
311 stream_type = STREAM_TYPE_VIDEO_CAVS;
312 break;
313 case AV_CODEC_ID_DIRAC:
314 stream_type = STREAM_TYPE_VIDEO_DIRAC;
315 break;
316 case AV_CODEC_ID_VC1:
317 stream_type = STREAM_TYPE_VIDEO_VC1;
318 break;
319 case AV_CODEC_ID_MP2:
320 case AV_CODEC_ID_MP3:
321 if ( st->codecpar->sample_rate > 0
322 && st->codecpar->sample_rate < 32000) {
323 stream_type = STREAM_TYPE_AUDIO_MPEG2;
324 } else {
325 stream_type = STREAM_TYPE_AUDIO_MPEG1;
326 }
327 break;
328 case AV_CODEC_ID_AAC:
329 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
330 ? STREAM_TYPE_AUDIO_AAC_LATM
331 : STREAM_TYPE_AUDIO_AAC;
332 break;
333 case AV_CODEC_ID_AAC_LATM:
334 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
335 break;
336 case AV_CODEC_ID_AC3:
337 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
338 ? STREAM_TYPE_PRIVATE_DATA
339 : STREAM_TYPE_AUDIO_AC3;
340 break;
341 case AV_CODEC_ID_EAC3:
342 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
343 ? STREAM_TYPE_PRIVATE_DATA
344 : STREAM_TYPE_AUDIO_EAC3;
345 break;
346 case AV_CODEC_ID_DTS:
347 stream_type = STREAM_TYPE_AUDIO_DTS;
348 break;
349 case AV_CODEC_ID_TRUEHD:
350 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
351 break;
352 case AV_CODEC_ID_OPUS:
353 stream_type = STREAM_TYPE_PRIVATE_DATA;
354 break;
355 case AV_CODEC_ID_TIMED_ID3:
356 stream_type = STREAM_TYPE_METADATA;
357 break;
358 case AV_CODEC_ID_DVB_SUBTITLE:
359 case AV_CODEC_ID_DVB_TELETEXT:
360 stream_type = STREAM_TYPE_PRIVATE_DATA;
361 break;
362 case AV_CODEC_ID_SMPTE_KLV:
363 if (st->codecpar->profile == FF_PROFILE_KLVA_SYNC) {
364 stream_type = STREAM_TYPE_METADATA;
365 } else {
366 stream_type = STREAM_TYPE_PRIVATE_DATA;
367 }
368 break;
369 default:
370 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
371 "Stream %d, codec %s, is muxed as a private data stream "
372 "and may not be recognized upon reading.\n", st->index,
373 avcodec_get_name(st->codecpar->codec_id));
374 stream_type = STREAM_TYPE_PRIVATE_DATA;
375 break;
376 }
377
378 return stream_type;
379 }
380
get_m2ts_stream_type(AVFormatContext * s,AVStream * st)381 static int get_m2ts_stream_type(AVFormatContext *s, AVStream *st)
382 {
383 int stream_type;
384 MpegTSWriteStream *ts_st = st->priv_data;
385
386 switch (st->codecpar->codec_id) {
387 case AV_CODEC_ID_MPEG2VIDEO:
388 stream_type = STREAM_TYPE_VIDEO_MPEG2;
389 break;
390 case AV_CODEC_ID_H264:
391 stream_type = STREAM_TYPE_VIDEO_H264;
392 break;
393 case AV_CODEC_ID_VC1:
394 stream_type = STREAM_TYPE_VIDEO_VC1;
395 break;
396 case AV_CODEC_ID_HEVC:
397 stream_type = STREAM_TYPE_VIDEO_HEVC;
398 break;
399 case AV_CODEC_ID_PCM_BLURAY:
400 stream_type = 0x80;
401 break;
402 case AV_CODEC_ID_AC3:
403 stream_type = 0x81;
404 break;
405 case AV_CODEC_ID_DTS:
406 stream_type = (st->codecpar->channels > 6) ? 0x85 : 0x82;
407 break;
408 case AV_CODEC_ID_TRUEHD:
409 stream_type = 0x83;
410 break;
411 case AV_CODEC_ID_EAC3:
412 stream_type = 0x84;
413 break;
414 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
415 stream_type = 0x90;
416 break;
417 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
418 stream_type = 0x92;
419 break;
420 default:
421 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
422 "Stream %d, codec %s, is muxed as a private data stream "
423 "and may not be recognized upon reading.\n", st->index,
424 avcodec_get_name(st->codecpar->codec_id));
425 stream_type = STREAM_TYPE_PRIVATE_DATA;
426 break;
427 }
428
429 return stream_type;
430 }
431
mpegts_write_pmt(AVFormatContext * s,MpegTSService * service)432 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
433 {
434 MpegTSWrite *ts = s->priv_data;
435 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
436 int val, stream_type, i, err = 0;
437
438 q = data;
439 put16(&q, 0xe000 | service->pcr_pid);
440
441 program_info_length_ptr = q;
442 q += 2; /* patched after */
443
444 /* put program info here */
445 if (ts->m2ts_mode) {
446 put_registration_descriptor(&q, MKTAG('H', 'D', 'M', 'V'));
447 *q++ = 0x88; // descriptor_tag - hdmv_copy_control_descriptor
448 *q++ = 0x04; // descriptor_length
449 put16(&q, 0x0fff); // CA_System_ID
450 *q++ = 0xfc; // private_data_byte
451 *q++ = 0xfc; // private_data_byte
452 }
453
454 val = 0xf000 | (q - program_info_length_ptr - 2);
455 program_info_length_ptr[0] = val >> 8;
456 program_info_length_ptr[1] = val;
457
458 for (i = 0; i < s->nb_streams; i++) {
459 AVStream *st = s->streams[i];
460 MpegTSWriteStream *ts_st = st->priv_data;
461 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
462 enum AVCodecID codec_id = st->codecpar->codec_id;
463
464 if (s->nb_programs) {
465 int k, found = 0;
466 AVProgram *program = service->program;
467
468 for (k = 0; k < program->nb_stream_indexes; k++)
469 if (program->stream_index[k] == i) {
470 found = 1;
471 break;
472 }
473
474 if (!found)
475 continue;
476 }
477
478 if (q - data > SECTION_LENGTH - 32) {
479 err = 1;
480 break;
481 }
482
483 stream_type = ts->m2ts_mode ? get_m2ts_stream_type(s, st) : get_dvb_stream_type(s, st);
484
485 *q++ = stream_type;
486 put16(&q, 0xe000 | ts_st->pid);
487 desc_length_ptr = q;
488 q += 2; /* patched after */
489
490 /* write optional descriptors here */
491 switch (st->codecpar->codec_type) {
492 case AVMEDIA_TYPE_AUDIO:
493 if (codec_id == AV_CODEC_ID_AC3)
494 put_registration_descriptor(&q, MKTAG('A', 'C', '-', '3'));
495 if (codec_id == AV_CODEC_ID_EAC3)
496 put_registration_descriptor(&q, MKTAG('E', 'A', 'C', '3'));
497 if (ts->flags & MPEGTS_FLAG_SYSTEM_B) {
498 if (codec_id == AV_CODEC_ID_AC3) {
499 DVBAC3Descriptor *dvb_ac3_desc = ts_st->dvb_ac3_desc;
500
501 *q++=0x6a; // AC3 descriptor see A038 DVB SI
502 if (dvb_ac3_desc) {
503 int len = 1 +
504 !!(dvb_ac3_desc->component_type_flag) +
505 !!(dvb_ac3_desc->bsid_flag) +
506 !!(dvb_ac3_desc->mainid_flag) +
507 !!(dvb_ac3_desc->asvc_flag);
508
509 *q++ = len;
510 *q++ = dvb_ac3_desc->component_type_flag << 7 | dvb_ac3_desc->bsid_flag << 6 |
511 dvb_ac3_desc->mainid_flag << 5 | dvb_ac3_desc->asvc_flag << 4;
512
513 if (dvb_ac3_desc->component_type_flag) *q++ = dvb_ac3_desc->component_type;
514 if (dvb_ac3_desc->bsid_flag) *q++ = dvb_ac3_desc->bsid;
515 if (dvb_ac3_desc->mainid_flag) *q++ = dvb_ac3_desc->mainid;
516 if (dvb_ac3_desc->asvc_flag) *q++ = dvb_ac3_desc->asvc;
517 } else {
518 *q++=1; // 1 byte, all flags sets to 0
519 *q++=0; // omit all fields...
520 }
521 } else if (codec_id == AV_CODEC_ID_EAC3) {
522 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
523 *q++=1; // 1 byte, all flags sets to 0
524 *q++=0; // omit all fields...
525 }
526 }
527 if (codec_id == AV_CODEC_ID_S302M)
528 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
529 if (codec_id == AV_CODEC_ID_OPUS) {
530 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
531 if (q - data > SECTION_LENGTH - 6 - 4) {
532 err = 1;
533 break;
534 }
535
536 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
537
538 *q++ = 0x7f; /* DVB extension descriptor */
539 *q++ = 2;
540 *q++ = 0x80;
541
542 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
543 if (st->codecpar->extradata[18] == 0 && st->codecpar->channels <= 2) {
544 /* RTP mapping family */
545 *q++ = st->codecpar->channels;
546 } else if (st->codecpar->extradata[18] == 1 && st->codecpar->channels <= 8 &&
547 st->codecpar->extradata_size >= 21 + st->codecpar->channels) {
548 static const uint8_t coupled_stream_counts[9] = {
549 1, 0, 1, 1, 2, 2, 2, 3, 3
550 };
551 static const uint8_t channel_map_a[8][8] = {
552 {0},
553 {0, 1},
554 {0, 2, 1},
555 {0, 1, 2, 3},
556 {0, 4, 1, 2, 3},
557 {0, 4, 1, 2, 3, 5},
558 {0, 4, 1, 2, 3, 5, 6},
559 {0, 6, 1, 2, 3, 4, 5, 7},
560 };
561 static const uint8_t channel_map_b[8][8] = {
562 {0},
563 {0, 1},
564 {0, 1, 2},
565 {0, 1, 2, 3},
566 {0, 1, 2, 3, 4},
567 {0, 1, 2, 3, 4, 5},
568 {0, 1, 2, 3, 4, 5, 6},
569 {0, 1, 2, 3, 4, 5, 6, 7},
570 };
571 /* Vorbis mapping family */
572
573 if (st->codecpar->extradata[19] == st->codecpar->channels - coupled_stream_counts[st->codecpar->channels] &&
574 st->codecpar->extradata[20] == coupled_stream_counts[st->codecpar->channels] &&
575 memcmp(&st->codecpar->extradata[21], channel_map_a[st->codecpar->channels-1], st->codecpar->channels) == 0) {
576 *q++ = st->codecpar->channels;
577 } else if (st->codecpar->channels >= 2 && st->codecpar->extradata[19] == st->codecpar->channels &&
578 st->codecpar->extradata[20] == 0 &&
579 memcmp(&st->codecpar->extradata[21], channel_map_b[st->codecpar->channels-1], st->codecpar->channels) == 0) {
580 *q++ = st->codecpar->channels | 0x80;
581 } else {
582 /* Unsupported, could write an extended descriptor here */
583 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
584 *q++ = 0xff;
585 }
586 } else {
587 /* Unsupported */
588 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
589 *q++ = 0xff;
590 }
591 } else if (st->codecpar->channels <= 2) {
592 /* Assume RTP mapping family */
593 *q++ = st->codecpar->channels;
594 } else {
595 /* Unsupported */
596 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
597 *q++ = 0xff;
598 }
599 }
600
601 if (lang) {
602 char *p;
603 char *next = lang->value;
604 uint8_t *len_ptr;
605
606 *q++ = ISO_639_LANGUAGE_DESCRIPTOR;
607 len_ptr = q++;
608 *len_ptr = 0;
609
610 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
611 if (q - data > SECTION_LENGTH - 4) {
612 err = 1;
613 break;
614 }
615 next = strchr(p, ',');
616 if (strlen(p) != 3 && (!next || next != p + 3))
617 continue; /* not a 3-letter code */
618
619 *q++ = *p++;
620 *q++ = *p++;
621 *q++ = *p++;
622
623 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
624 *q++ = 0x01;
625 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
626 *q++ = 0x02;
627 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
628 *q++ = 0x03;
629 else
630 *q++ = 0; /* undefined type */
631
632 *len_ptr += 4;
633 }
634
635 if (*len_ptr == 0)
636 q -= 2; /* no language codes were written */
637 }
638 break;
639 case AVMEDIA_TYPE_SUBTITLE:
640 {
641 const char default_language[] = "und";
642 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
643
644 if (codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
645 uint8_t *len_ptr;
646 int extradata_copied = 0;
647
648 *q++ = 0x59; /* subtitling_descriptor */
649 len_ptr = q++;
650
651 while (strlen(language) >= 3) {
652 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
653 err = 1;
654 break;
655 }
656 *q++ = *language++;
657 *q++ = *language++;
658 *q++ = *language++;
659 /* Skip comma */
660 if (*language != '\0')
661 language++;
662
663 if (st->codecpar->extradata_size - extradata_copied >= 5) {
664 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
665 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
666 extradata_copied += 5;
667 q += 4;
668 } else {
669 /* subtitling_type:
670 * 0x10 - normal with no monitor aspect ratio criticality
671 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
672 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
673 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
674 /* support of old 4-byte extradata format */
675 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
676 extradata_copied += 4;
677 q += 4;
678 } else {
679 put16(&q, 1); /* composition_page_id */
680 put16(&q, 1); /* ancillary_page_id */
681 }
682 }
683 }
684
685 *len_ptr = q - len_ptr - 1;
686 } else if (codec_id == AV_CODEC_ID_DVB_TELETEXT) {
687 uint8_t *len_ptr = NULL;
688 int extradata_copied = 0;
689
690 /* The descriptor tag. teletext_descriptor */
691 *q++ = 0x56;
692 len_ptr = q++;
693
694 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
695 *q++ = *language++;
696 *q++ = *language++;
697 *q++ = *language++;
698 /* Skip comma */
699 if (*language != '\0')
700 language++;
701
702 if (st->codecpar->extradata_size - 1 > extradata_copied) {
703 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
704 extradata_copied += 2;
705 q += 2;
706 } else {
707 /* The Teletext descriptor:
708 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
709 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
710 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
711 *q++ = 0x08;
712 *q++ = 0x00;
713 }
714 }
715
716 *len_ptr = q - len_ptr - 1;
717 }
718 }
719 break;
720 case AVMEDIA_TYPE_VIDEO:
721 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
722 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
723 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
724 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
725 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
726 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
727 }
728 break;
729 case AVMEDIA_TYPE_DATA:
730 if (codec_id == AV_CODEC_ID_SMPTE_KLV) {
731 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
732 } else if (codec_id == AV_CODEC_ID_TIMED_ID3) {
733 const char *tag = "ID3 ";
734 *q++ = METADATA_DESCRIPTOR;
735 *q++ = 13;
736 put16(&q, 0xffff); /* metadata application format */
737 putbuf(&q, tag, strlen(tag));
738 *q++ = 0xff; /* metadata format */
739 putbuf(&q, tag, strlen(tag));
740 *q++ = 0; /* metadata service ID */
741 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
742 }
743 break;
744 }
745
746 val = 0xf000 | (q - desc_length_ptr - 2);
747 desc_length_ptr[0] = val >> 8;
748 desc_length_ptr[1] = val;
749 }
750
751 if (err)
752 av_log(s, AV_LOG_ERROR,
753 "The PMT section cannot fit stream %d and all following streams.\n"
754 "Try reducing the number of languages in the audio streams "
755 "or the total number of streams.\n", i);
756
757 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
758 data, q - data);
759 return 0;
760 }
761
mpegts_write_sdt(AVFormatContext * s)762 static void mpegts_write_sdt(AVFormatContext *s)
763 {
764 MpegTSWrite *ts = s->priv_data;
765 MpegTSService *service;
766 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
767 int i, running_status, free_ca_mode, val;
768
769 q = data;
770 put16(&q, ts->original_network_id);
771 *q++ = 0xff;
772 for (i = 0; i < ts->nb_services; i++) {
773 service = ts->services[i];
774 put16(&q, service->sid);
775 *q++ = 0xfc | 0x00; /* currently no EIT info */
776 desc_list_len_ptr = q;
777 q += 2;
778 running_status = 4; /* running */
779 free_ca_mode = 0;
780
781 /* write only one descriptor for the service name and provider */
782 *q++ = 0x48;
783 desc_len_ptr = q;
784 q++;
785 *q++ = ts->service_type;
786 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
787 putbuf(&q, service->name, service->name[0] + 1);
788 desc_len_ptr[0] = q - desc_len_ptr - 1;
789
790 /* fill descriptor length */
791 val = (running_status << 13) | (free_ca_mode << 12) |
792 (q - desc_list_len_ptr - 2);
793 desc_list_len_ptr[0] = val >> 8;
794 desc_list_len_ptr[1] = val;
795 }
796 mpegts_write_section1(&ts->sdt, SDT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
797 data, q - data);
798 }
799
800 /* This stores a string in buf with the correct encoding and also sets the
801 * first byte as the length. !str is accepted for an empty string.
802 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
803 * then we keep it as is, otherwise we signal UTF-8 encoding. */
encode_str8(uint8_t * buf,const char * str)804 static int encode_str8(uint8_t *buf, const char *str)
805 {
806 size_t str_len;
807 if (!str)
808 str = "";
809 str_len = strlen(str);
810 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
811 const uint8_t *q = str;
812 int has_multibyte = 0;
813 while (*q) {
814 uint32_t code;
815 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
816 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
817 }
818 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
819 if (str_len > 254)
820 return AVERROR(EINVAL);
821 buf[0] = str_len + 1;
822 buf[1] = 0x15;
823 memcpy(&buf[2], str, str_len);
824 return 0;
825 }
826 }
827 invalid:
828 /* Otherwise let's just encode the string as is! */
829 if (str_len > 255)
830 return AVERROR(EINVAL);
831 buf[0] = str_len;
832 memcpy(&buf[1], str, str_len);
833 return 0;
834 }
835
get_pcr(const MpegTSWrite * ts)836 static int64_t get_pcr(const MpegTSWrite *ts)
837 {
838 return av_rescale(ts->total_size + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
839 ts->first_pcr;
840 }
841
write_packet(AVFormatContext * s,const uint8_t * packet)842 static void write_packet(AVFormatContext *s, const uint8_t *packet)
843 {
844 MpegTSWrite *ts = s->priv_data;
845 if (ts->m2ts_mode) {
846 int64_t pcr = get_pcr(s->priv_data);
847 uint32_t tp_extra_header = pcr % 0x3fffffff;
848 tp_extra_header = AV_RB32(&tp_extra_header);
849 avio_write(s->pb, (unsigned char *) &tp_extra_header,
850 sizeof(tp_extra_header));
851 }
852 avio_write(s->pb, packet, TS_PACKET_SIZE);
853 ts->total_size += TS_PACKET_SIZE;
854 }
855
section_write_packet(MpegTSSection * s,const uint8_t * packet)856 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
857 {
858 AVFormatContext *ctx = s->opaque;
859 write_packet(ctx, packet);
860 }
861
mpegts_add_service(AVFormatContext * s,int sid,const AVDictionary * metadata,AVProgram * program)862 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
863 const AVDictionary *metadata,
864 AVProgram *program)
865 {
866 MpegTSWrite *ts = s->priv_data;
867 MpegTSService *service;
868 AVDictionaryEntry *title, *provider;
869 char default_service_name[32];
870 const char *service_name;
871 const char *provider_name;
872
873 title = av_dict_get(metadata, "service_name", NULL, 0);
874 if (!title)
875 title = av_dict_get(metadata, "title", NULL, 0);
876 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
877 service_name = title ? title->value : default_service_name;
878 provider = av_dict_get(metadata, "service_provider", NULL, 0);
879 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
880
881 service = av_mallocz(sizeof(MpegTSService));
882 if (!service)
883 return NULL;
884 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
885 service->sid = sid;
886 service->pcr_pid = 0x1fff;
887 if (encode_str8(service->provider_name, provider_name) < 0 ||
888 encode_str8(service->name, service_name) < 0) {
889 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
890 goto fail;
891 }
892 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
893 goto fail;
894
895 service->pmt.write_packet = section_write_packet;
896 service->pmt.opaque = s;
897 service->pmt.cc = 15;
898 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
899 service->program = program;
900
901 return service;
902 fail:
903 av_free(service);
904 return NULL;
905 }
906
enable_pcr_generation_for_stream(AVFormatContext * s,AVStream * pcr_st)907 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
908 {
909 MpegTSWrite *ts = s->priv_data;
910 MpegTSWriteStream *ts_st = pcr_st->priv_data;
911
912 if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
913 int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
914 ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
915 } else {
916 /* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
917 int64_t frame_period = 0;
918 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
919 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
920 if (!frame_size) {
921 av_log(s, AV_LOG_WARNING, "frame size not set\n");
922 frame_size = 512;
923 }
924 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
925 } else if (pcr_st->avg_frame_rate.num) {
926 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
927 }
928 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
929 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
930 else
931 ts_st->pcr_period = 1;
932 }
933
934 // output a PCR as soon as possible
935 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
936 }
937
select_pcr_streams(AVFormatContext * s)938 static void select_pcr_streams(AVFormatContext *s)
939 {
940 MpegTSWrite *ts = s->priv_data;
941
942 for (int i = 0; i < ts->nb_services; i++) {
943 MpegTSService *service = ts->services[i];
944 AVStream *pcr_st = NULL;
945 AVProgram *program = service->program;
946 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
947
948 for (int j = 0; j < nb_streams; j++) {
949 AVStream *st = s->streams[program ? program->stream_index[j] : j];
950 if (!pcr_st ||
951 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
952 {
953 pcr_st = st;
954 }
955 }
956
957 if (pcr_st) {
958 MpegTSWriteStream *ts_st = pcr_st->priv_data;
959 service->pcr_pid = ts_st->pid;
960 enable_pcr_generation_for_stream(s, pcr_st);
961 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
962 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
963 }
964 }
965 }
966
mpegts_init(AVFormatContext * s)967 static int mpegts_init(AVFormatContext *s)
968 {
969 MpegTSWrite *ts = s->priv_data;
970 int i, j;
971 int ret;
972
973 if (ts->m2ts_mode == -1) {
974 if (av_match_ext(s->url, "m2ts")) {
975 ts->m2ts_mode = 1;
976 } else {
977 ts->m2ts_mode = 0;
978 }
979 }
980
981 ts->m2ts_video_pid = M2TS_VIDEO_PID;
982 ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
983 ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
984 ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
985
986 if (ts->m2ts_mode) {
987 ts->pmt_start_pid = M2TS_PMT_PID;
988 if (s->nb_programs > 1) {
989 av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
990 return AVERROR(EINVAL);
991 }
992 }
993
994 if (s->max_delay < 0) /* Not set by the caller */
995 s->max_delay = 0;
996
997 // round up to a whole number of TS packets
998 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
999
1000 if (!s->nb_programs) {
1001 /* allocate a single DVB service */
1002 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
1003 return AVERROR(ENOMEM);
1004 } else {
1005 for (i = 0; i < s->nb_programs; i++) {
1006 AVProgram *program = s->programs[i];
1007 if (!mpegts_add_service(s, program->id, program->metadata, program))
1008 return AVERROR(ENOMEM);
1009 }
1010 }
1011
1012 ts->pat.pid = PAT_PID;
1013 /* Initialize at 15 so that it wraps and is equal to 0 for the
1014 * first packet we write. */
1015 ts->pat.cc = 15;
1016 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1017 ts->pat.write_packet = section_write_packet;
1018 ts->pat.opaque = s;
1019
1020 ts->sdt.pid = SDT_PID;
1021 ts->sdt.cc = 15;
1022 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1023 ts->sdt.write_packet = section_write_packet;
1024 ts->sdt.opaque = s;
1025
1026 ts->pkt = av_packet_alloc();
1027 if (!ts->pkt)
1028 return AVERROR(ENOMEM);
1029
1030 /* assign pids to each stream */
1031 for (i = 0; i < s->nb_streams; i++) {
1032 AVStream *st = s->streams[i];
1033 MpegTSWriteStream *ts_st;
1034
1035 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
1036 if (!ts_st) {
1037 return AVERROR(ENOMEM);
1038 }
1039 st->priv_data = ts_st;
1040
1041 avpriv_set_pts_info(st, 33, 1, 90000);
1042
1043 ts_st->payload = av_mallocz(ts->pes_payload_size);
1044 if (!ts_st->payload) {
1045 return AVERROR(ENOMEM);
1046 }
1047
1048 /* MPEG pid values < 16 are reserved. Applications which set st->id in
1049 * this range are assigned a calculated pid. */
1050 if (st->id < 16) {
1051 if (ts->m2ts_mode) {
1052 switch (st->codecpar->codec_type) {
1053 case AVMEDIA_TYPE_VIDEO:
1054 ts_st->pid = ts->m2ts_video_pid++;
1055 break;
1056 case AVMEDIA_TYPE_AUDIO:
1057 ts_st->pid = ts->m2ts_audio_pid++;
1058 break;
1059 case AVMEDIA_TYPE_SUBTITLE:
1060 switch (st->codecpar->codec_id) {
1061 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
1062 ts_st->pid = ts->m2ts_pgssub_pid++;
1063 break;
1064 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
1065 ts_st->pid = ts->m2ts_textsub_pid++;
1066 break;
1067 }
1068 break;
1069 }
1070 if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
1071 ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
1072 ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
1073 ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
1074 ts_st->pid < 16) {
1075 av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
1076 return AVERROR(EINVAL);
1077 }
1078 } else {
1079 ts_st->pid = ts->start_pid + i;
1080 }
1081 } else {
1082 ts_st->pid = st->id;
1083 }
1084 if (ts_st->pid >= 0x1FFF) {
1085 av_log(s, AV_LOG_ERROR,
1086 "Invalid stream id %d, must be less than 8191\n", st->id);
1087 return AVERROR(EINVAL);
1088 }
1089 for (j = 0; j < ts->nb_services; j++) {
1090 if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
1091 av_log(s, AV_LOG_ERROR,
1092 "Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
1093 return AVERROR(EINVAL);
1094 }
1095 if (ts_st->pid == ts->services[j]->pmt.pid) {
1096 av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
1097 return AVERROR(EINVAL);
1098 }
1099 }
1100 for (j = 0; j < i; j++) {
1101 MpegTSWriteStream *ts_st_prev = s->streams[j]->priv_data;
1102 if (ts_st_prev->pid == ts_st->pid) {
1103 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
1104 return AVERROR(EINVAL);
1105 }
1106 }
1107 ts_st->payload_pts = AV_NOPTS_VALUE;
1108 ts_st->payload_dts = AV_NOPTS_VALUE;
1109 ts_st->cc = 15;
1110 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
1111 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1112 st->codecpar->extradata_size > 0) {
1113 AVStream *ast;
1114 ts_st->amux = avformat_alloc_context();
1115 if (!ts_st->amux) {
1116 return AVERROR(ENOMEM);
1117 }
1118 ts_st->amux->oformat =
1119 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
1120 NULL, NULL);
1121 if (!ts_st->amux->oformat) {
1122 return AVERROR(EINVAL);
1123 }
1124 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
1125 return AVERROR(ENOMEM);
1126 }
1127 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
1128 if (ret != 0)
1129 return ret;
1130 ast->time_base = st->time_base;
1131 ret = avformat_write_header(ts_st->amux, NULL);
1132 if (ret < 0)
1133 return ret;
1134 }
1135 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1136 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
1137 }
1138 }
1139
1140 if (ts->copyts < 1)
1141 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
1142
1143 select_pcr_streams(s);
1144
1145 ts->last_pat_ts = AV_NOPTS_VALUE;
1146 ts->last_sdt_ts = AV_NOPTS_VALUE;
1147 ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1148 ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1149
1150 if (ts->mux_rate == 1)
1151 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1152 else
1153 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1154 av_log(s, AV_LOG_VERBOSE,
1155 "sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms\n",
1156 av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
1157 av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
1158
1159 return 0;
1160 }
1161
1162 /* send SDT, PAT and PMT tables regularly */
retransmit_si_info(AVFormatContext * s,int force_pat,int force_sdt,int64_t pcr)1163 static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int64_t pcr)
1164 {
1165 MpegTSWrite *ts = s->priv_data;
1166 int i;
1167
1168 if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1169 (pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
1170 force_sdt
1171 ) {
1172 if (pcr != AV_NOPTS_VALUE)
1173 ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
1174 mpegts_write_sdt(s);
1175 }
1176 if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1177 (pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
1178 force_pat) {
1179 if (pcr != AV_NOPTS_VALUE)
1180 ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
1181 mpegts_write_pat(s);
1182 for (i = 0; i < ts->nb_services; i++)
1183 mpegts_write_pmt(s, ts->services[i]);
1184 }
1185 }
1186
write_pcr_bits(uint8_t * buf,int64_t pcr)1187 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1188 {
1189 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1190
1191 *buf++ = pcr_high >> 25;
1192 *buf++ = pcr_high >> 17;
1193 *buf++ = pcr_high >> 9;
1194 *buf++ = pcr_high >> 1;
1195 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1196 *buf++ = pcr_low;
1197
1198 return 6;
1199 }
1200
1201 /* Write a single null transport stream packet */
mpegts_insert_null_packet(AVFormatContext * s)1202 static void mpegts_insert_null_packet(AVFormatContext *s)
1203 {
1204 uint8_t *q;
1205 uint8_t buf[TS_PACKET_SIZE];
1206
1207 q = buf;
1208 *q++ = 0x47;
1209 *q++ = 0x00 | 0x1f;
1210 *q++ = 0xff;
1211 *q++ = 0x10;
1212 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1213 write_packet(s, buf);
1214 }
1215
1216 /* Write a single transport stream packet with a PCR and no payload */
mpegts_insert_pcr_only(AVFormatContext * s,AVStream * st)1217 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1218 {
1219 MpegTSWrite *ts = s->priv_data;
1220 MpegTSWriteStream *ts_st = st->priv_data;
1221 uint8_t *q;
1222 uint8_t buf[TS_PACKET_SIZE];
1223
1224 q = buf;
1225 *q++ = 0x47;
1226 *q++ = ts_st->pid >> 8;
1227 *q++ = ts_st->pid;
1228 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1229 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1230 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1231 *q++ = 0x10; /* Adaptation flags: PCR present */
1232 if (ts_st->discontinuity) {
1233 q[-1] |= 0x80;
1234 ts_st->discontinuity = 0;
1235 }
1236
1237 /* PCR coded into 6 bytes */
1238 q += write_pcr_bits(q, get_pcr(ts));
1239
1240 /* stuffing bytes */
1241 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1242 write_packet(s, buf);
1243 }
1244
write_pts(uint8_t * q,int fourbits,int64_t pts)1245 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1246 {
1247 int val;
1248
1249 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1250 *q++ = val;
1251 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1252 *q++ = val >> 8;
1253 *q++ = val;
1254 val = (((pts) & 0x7fff) << 1) | 1;
1255 *q++ = val >> 8;
1256 *q++ = val;
1257 }
1258
1259 /* Set an adaptation field flag in an MPEG-TS packet*/
set_af_flag(uint8_t * pkt,int flag)1260 static void set_af_flag(uint8_t *pkt, int flag)
1261 {
1262 // expect at least one flag to set
1263 av_assert0(flag);
1264
1265 if ((pkt[3] & 0x20) == 0) {
1266 // no AF yet, set adaptation field flag
1267 pkt[3] |= 0x20;
1268 // 1 byte length, no flags
1269 pkt[4] = 1;
1270 pkt[5] = 0;
1271 }
1272 pkt[5] |= flag;
1273 }
1274
1275 /* Extend the adaptation field by size bytes */
extend_af(uint8_t * pkt,int size)1276 static void extend_af(uint8_t *pkt, int size)
1277 {
1278 // expect already existing adaptation field
1279 av_assert0(pkt[3] & 0x20);
1280 pkt[4] += size;
1281 }
1282
1283 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
get_ts_payload_start(uint8_t * pkt)1284 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1285 {
1286 if (pkt[3] & 0x20)
1287 return pkt + 5 + pkt[4];
1288 else
1289 return pkt + 4;
1290 }
1291
1292 /* Add a PES header to the front of the payload, and segment into an integer
1293 * number of TS packets. The final TS packet is padded using an oversized
1294 * adaptation header to exactly fill the last TS packet.
1295 * NOTE: 'payload' contains a complete PES payload. */
mpegts_write_pes(AVFormatContext * s,AVStream * st,const uint8_t * payload,int payload_size,int64_t pts,int64_t dts,int key,int stream_id)1296 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1297 const uint8_t *payload, int payload_size,
1298 int64_t pts, int64_t dts, int key, int stream_id)
1299 {
1300 MpegTSWriteStream *ts_st = st->priv_data;
1301 MpegTSWrite *ts = s->priv_data;
1302 uint8_t buf[TS_PACKET_SIZE];
1303 uint8_t *q;
1304 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
1305 int afc_len, stuffing_len;
1306 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1307 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1308 int force_sdt = 0;
1309
1310 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1311 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1312 force_pat = 1;
1313 }
1314
1315 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1316 force_pat = 1;
1317 force_sdt = 1;
1318 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1319 }
1320
1321 is_start = 1;
1322 while (payload_size > 0) {
1323 int64_t pcr = AV_NOPTS_VALUE;
1324 if (ts->mux_rate > 1)
1325 pcr = get_pcr(ts);
1326 else if (dts != AV_NOPTS_VALUE)
1327 pcr = (dts - delay) * 300;
1328
1329 retransmit_si_info(s, force_pat, force_sdt, pcr);
1330 force_pat = 0;
1331 force_sdt = 0;
1332
1333 write_pcr = 0;
1334 if (ts->mux_rate > 1) {
1335 /* Send PCR packets for all PCR streams if needed */
1336 pcr = get_pcr(ts);
1337 if (pcr >= ts->next_pcr) {
1338 int64_t next_pcr = INT64_MAX;
1339 for (int i = 0; i < s->nb_streams; i++) {
1340 /* Make the current stream the last, because for that we
1341 * can insert the pcr into the payload later */
1342 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1343 AVStream *st2 = s->streams[st2_index];
1344 MpegTSWriteStream *ts_st2 = st2->priv_data;
1345 if (ts_st2->pcr_period) {
1346 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1347 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1348 if (st2 != st) {
1349 mpegts_insert_pcr_only(s, st2);
1350 pcr = get_pcr(ts);
1351 } else {
1352 write_pcr = 1;
1353 }
1354 }
1355 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1356 }
1357 }
1358 ts->next_pcr = next_pcr;
1359 }
1360 if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
1361 /* pcr insert gets priority over null packet insert */
1362 if (write_pcr)
1363 mpegts_insert_pcr_only(s, st);
1364 else
1365 mpegts_insert_null_packet(s);
1366 /* recalculate write_pcr and possibly retransmit si_info */
1367 continue;
1368 }
1369 } else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
1370 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1371 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1372 write_pcr = 1;
1373 }
1374 }
1375
1376 /* prepare packet header */
1377 q = buf;
1378 *q++ = 0x47;
1379 val = ts_st->pid >> 8;
1380 if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
1381 val |= 0x20;
1382 if (is_start)
1383 val |= 0x40;
1384 *q++ = val;
1385 *q++ = ts_st->pid;
1386 ts_st->cc = ts_st->cc + 1 & 0xf;
1387 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1388 if (ts_st->discontinuity) {
1389 set_af_flag(buf, 0x80);
1390 q = get_ts_payload_start(buf);
1391 ts_st->discontinuity = 0;
1392 }
1393 if (key && is_start && pts != AV_NOPTS_VALUE) {
1394 // set Random Access for key frames
1395 if (ts_st->pcr_period)
1396 write_pcr = 1;
1397 set_af_flag(buf, 0x40);
1398 q = get_ts_payload_start(buf);
1399 }
1400 if (write_pcr) {
1401 set_af_flag(buf, 0x10);
1402 q = get_ts_payload_start(buf);
1403 // add 11, pcr references the last byte of program clock reference base
1404 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1405 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1406 extend_af(buf, write_pcr_bits(q, pcr));
1407 q = get_ts_payload_start(buf);
1408 }
1409 if (is_start) {
1410 int pes_extension = 0;
1411 int pes_header_stuffing_bytes = 0;
1412 /* write PES header */
1413 *q++ = 0x00;
1414 *q++ = 0x00;
1415 *q++ = 0x01;
1416 is_dvb_subtitle = 0;
1417 is_dvb_teletext = 0;
1418 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1419 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1420 *q++ = STREAM_ID_EXTENDED_STREAM_ID;
1421 else
1422 *q++ = STREAM_ID_VIDEO_STREAM_0;
1423 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1424 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1425 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1426 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1427 *q++ = STREAM_ID_AUDIO_STREAM_0;
1428 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1429 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1430 ts->m2ts_mode) {
1431 *q++ = STREAM_ID_EXTENDED_STREAM_ID;
1432 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1433 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1434 *q++ = STREAM_ID_PRIVATE_STREAM_1;
1435 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1436 *q++ = stream_id != -1 ? stream_id : STREAM_ID_METADATA_STREAM;
1437
1438 if (stream_id == STREAM_ID_PRIVATE_STREAM_1) /* asynchronous KLV */
1439 pts = dts = AV_NOPTS_VALUE;
1440 } else {
1441 *q++ = STREAM_ID_PRIVATE_STREAM_1;
1442 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1443 if (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1444 is_dvb_subtitle = 1;
1445 } else if (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1446 is_dvb_teletext = 1;
1447 }
1448 }
1449 }
1450 header_len = 0;
1451 flags = 0;
1452 if (pts != AV_NOPTS_VALUE) {
1453 header_len += 5;
1454 flags |= 0x80;
1455 }
1456 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1457 header_len += 5;
1458 flags |= 0x40;
1459 }
1460 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1461 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1462 /* set PES_extension_flag */
1463 pes_extension = 1;
1464 flags |= 0x01;
1465
1466 /* One byte for PES2 extension flag +
1467 * one byte for extension length +
1468 * one byte for extension id */
1469 header_len += 3;
1470 }
1471 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1472 * otherwise it will not play sound on blu-ray
1473 */
1474 if (ts->m2ts_mode &&
1475 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1476 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1477 /* set PES_extension_flag */
1478 pes_extension = 1;
1479 flags |= 0x01;
1480 header_len += 3;
1481 }
1482 if (is_dvb_teletext) {
1483 pes_header_stuffing_bytes = 0x24 - header_len;
1484 header_len = 0x24;
1485 }
1486 len = payload_size + header_len + 3;
1487 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1488 if (is_dvb_subtitle) {
1489 len += 3;
1490 payload_size++;
1491 }
1492 if (len > 0xffff)
1493 len = 0;
1494 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1495 len = 0;
1496 }
1497 *q++ = len >> 8;
1498 *q++ = len;
1499 val = 0x80;
1500 /* data alignment indicator is required for subtitle and data streams */
1501 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1502 val |= 0x04;
1503 *q++ = val;
1504 *q++ = flags;
1505 *q++ = header_len;
1506 if (pts != AV_NOPTS_VALUE) {
1507 write_pts(q, flags >> 6, pts);
1508 q += 5;
1509 }
1510 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1511 write_pts(q, 1, dts);
1512 q += 5;
1513 }
1514 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1515 flags = 0x01; /* set PES_extension_flag_2 */
1516 *q++ = flags;
1517 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1518 /* Set the stream ID extension flag bit to 0 and
1519 * write the extended stream ID. */
1520 *q++ = 0x00 | 0x60;
1521 }
1522 /* For Blu-ray AC3 Audio Setting extended flags */
1523 if (ts->m2ts_mode &&
1524 pes_extension &&
1525 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1526 flags = 0x01; /* set PES_extension_flag_2 */
1527 *q++ = flags;
1528 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1529 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1530 }
1531
1532
1533 if (is_dvb_subtitle) {
1534 /* First two fields of DVB subtitles PES data:
1535 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1536 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1537 *q++ = 0x20;
1538 *q++ = 0x00;
1539 }
1540 if (is_dvb_teletext) {
1541 memset(q, 0xff, pes_header_stuffing_bytes);
1542 q += pes_header_stuffing_bytes;
1543 }
1544 is_start = 0;
1545 }
1546 /* header size */
1547 header_len = q - buf;
1548 /* data len */
1549 len = TS_PACKET_SIZE - header_len;
1550 if (len > payload_size)
1551 len = payload_size;
1552 stuffing_len = TS_PACKET_SIZE - header_len - len;
1553 if (stuffing_len > 0) {
1554 /* add stuffing with AFC */
1555 if (buf[3] & 0x20) {
1556 /* stuffing already present: increase its size */
1557 afc_len = buf[4] + 1;
1558 memmove(buf + 4 + afc_len + stuffing_len,
1559 buf + 4 + afc_len,
1560 header_len - (4 + afc_len));
1561 buf[4] += stuffing_len;
1562 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1563 } else {
1564 /* add stuffing */
1565 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1566 buf[3] |= 0x20;
1567 buf[4] = stuffing_len - 1;
1568 if (stuffing_len >= 2) {
1569 buf[5] = 0x00;
1570 memset(buf + 6, 0xff, stuffing_len - 2);
1571 }
1572 }
1573 }
1574
1575 if (is_dvb_subtitle && payload_size == len) {
1576 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1577 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1578 } else {
1579 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1580 }
1581
1582 payload += len;
1583 payload_size -= len;
1584 write_packet(s, buf);
1585 }
1586 ts_st->prev_payload_key = key;
1587 }
1588
ff_check_h264_startcode(AVFormatContext * s,const AVStream * st,const AVPacket * pkt)1589 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1590 {
1591 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1592 if (!st->nb_frames) {
1593 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1594 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1595 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1596 return AVERROR_INVALIDDATA;
1597 }
1598 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1599 if (pkt->size)
1600 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1601 av_log(s, AV_LOG_WARNING, "\n");
1602 }
1603 return 0;
1604 }
1605
check_hevc_startcode(AVFormatContext * s,const AVStream * st,const AVPacket * pkt)1606 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1607 {
1608 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1609 if (!st->nb_frames) {
1610 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1611 return AVERROR_PATCHWELCOME;
1612 }
1613 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1614 if (pkt->size)
1615 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1616 av_log(s, AV_LOG_WARNING, "\n");
1617 }
1618 return 0;
1619 }
1620
1621 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1622 * Released under the LGPL v2.1+, written by
1623 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1624 */
opus_get_packet_samples(AVFormatContext * s,AVPacket * pkt)1625 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1626 {
1627 static const int durations[32] = {
1628 480, 960, 1920, 2880, /* Silk NB */
1629 480, 960, 1920, 2880, /* Silk MB */
1630 480, 960, 1920, 2880, /* Silk WB */
1631 480, 960, /* Hybrid SWB */
1632 480, 960, /* Hybrid FB */
1633 120, 240, 480, 960, /* CELT NB */
1634 120, 240, 480, 960, /* CELT NB */
1635 120, 240, 480, 960, /* CELT NB */
1636 120, 240, 480, 960, /* CELT NB */
1637 };
1638 int toc, frame_duration, nframes, duration;
1639
1640 if (pkt->size < 1)
1641 return 0;
1642
1643 toc = pkt->data[0];
1644
1645 frame_duration = durations[toc >> 3];
1646 switch (toc & 3) {
1647 case 0:
1648 nframes = 1;
1649 break;
1650 case 1:
1651 nframes = 2;
1652 break;
1653 case 2:
1654 nframes = 2;
1655 break;
1656 case 3:
1657 if (pkt->size < 2)
1658 return 0;
1659 nframes = pkt->data[1] & 63;
1660 break;
1661 }
1662
1663 duration = nframes * frame_duration;
1664 if (duration > 5760) {
1665 av_log(s, AV_LOG_WARNING,
1666 "Opus packet duration > 120 ms, invalid");
1667 return 0;
1668 }
1669
1670 return duration;
1671 }
1672
mpegts_write_packet_internal(AVFormatContext * s,AVPacket * pkt)1673 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1674 {
1675 AVStream *st = s->streams[pkt->stream_index];
1676 int size = pkt->size;
1677 uint8_t *buf = pkt->data;
1678 uint8_t *data = NULL;
1679 MpegTSWrite *ts = s->priv_data;
1680 MpegTSWriteStream *ts_st = st->priv_data;
1681 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1682 const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
1683 int64_t dts = pkt->dts, pts = pkt->pts;
1684 int opus_samples = 0;
1685 buffer_size_t side_data_size;
1686 uint8_t *side_data = NULL;
1687 int stream_id = -1;
1688
1689 side_data = av_packet_get_side_data(pkt,
1690 AV_PKT_DATA_MPEGTS_STREAM_ID,
1691 &side_data_size);
1692 if (side_data)
1693 stream_id = side_data[0];
1694
1695 if (ts->copyts < 1) {
1696 if (!ts->first_dts_checked && dts != AV_NOPTS_VALUE) {
1697 ts->first_pcr += dts * 300;
1698 ts->first_dts_checked = 1;
1699 }
1700
1701 if (pts != AV_NOPTS_VALUE)
1702 pts += delay;
1703 if (dts != AV_NOPTS_VALUE)
1704 dts += delay;
1705 }
1706
1707 if (!ts_st->first_timestamp_checked && (pts == AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE)) {
1708 av_log(s, AV_LOG_ERROR, "first pts and dts value must be set\n");
1709 return AVERROR_INVALIDDATA;
1710 }
1711 ts_st->first_timestamp_checked = 1;
1712
1713 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1714 const uint8_t *p = buf, *buf_end = p + size;
1715 uint32_t state = -1;
1716 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1717 int ret = ff_check_h264_startcode(s, st, pkt);
1718 if (ret < 0)
1719 return ret;
1720
1721 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1722 extradd = 0;
1723
1724 do {
1725 p = avpriv_find_start_code(p, buf_end, &state);
1726 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1727 if ((state & 0x1f) == 7)
1728 extradd = 0;
1729 } while (p < buf_end && (state & 0x1f) != 9 &&
1730 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1731
1732 if ((state & 0x1f) != 5)
1733 extradd = 0;
1734 if ((state & 0x1f) != 9) { // AUD NAL
1735 data = av_malloc(pkt->size + 6 + extradd);
1736 if (!data)
1737 return AVERROR(ENOMEM);
1738 memcpy(data + 6, st->codecpar->extradata, extradd);
1739 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1740 AV_WB32(data, 0x00000001);
1741 data[4] = 0x09;
1742 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1743 buf = data;
1744 size = pkt->size + 6 + extradd;
1745 }
1746 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1747 if (pkt->size < 2) {
1748 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1749 return AVERROR_INVALIDDATA;
1750 }
1751 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1752 int ret;
1753 AVPacket *pkt2 = ts->pkt;
1754
1755 if (!ts_st->amux) {
1756 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1757 "and extradata missing\n");
1758 } else {
1759 av_packet_unref(pkt2);
1760 pkt2->data = pkt->data;
1761 pkt2->size = pkt->size;
1762 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1763 pkt2->dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1764
1765 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1766 if (ret < 0)
1767 return ret;
1768
1769 ret = av_write_frame(ts_st->amux, pkt2);
1770 if (ret < 0) {
1771 ffio_free_dyn_buf(&ts_st->amux->pb);
1772 return ret;
1773 }
1774 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1775 ts_st->amux->pb = NULL;
1776 buf = data;
1777 }
1778 }
1779 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1780 const uint8_t *p = buf, *buf_end = p + size;
1781 uint32_t state = -1;
1782 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1783 int ret = check_hevc_startcode(s, st, pkt);
1784 if (ret < 0)
1785 return ret;
1786
1787 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1788 extradd = 0;
1789
1790 do {
1791 p = avpriv_find_start_code(p, buf_end, &state);
1792 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1793 if ((state & 0x7e) == 2*32)
1794 extradd = 0;
1795 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1796 (state & 0x7e) >= 2*32);
1797
1798 if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
1799 extradd = 0;
1800 if ((state & 0x7e) != 2*35) { // AUD NAL
1801 data = av_malloc(pkt->size + 7 + extradd);
1802 if (!data)
1803 return AVERROR(ENOMEM);
1804 memcpy(data + 7, st->codecpar->extradata, extradd);
1805 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1806 AV_WB32(data, 0x00000001);
1807 data[4] = 2*35;
1808 data[5] = 1;
1809 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
1810 buf = data;
1811 size = pkt->size + 7 + extradd;
1812 }
1813 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1814 if (pkt->size < 2) {
1815 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
1816 return AVERROR_INVALIDDATA;
1817 }
1818
1819 /* Add Opus control header */
1820 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
1821 uint8_t *side_data;
1822 buffer_size_t side_data_size;
1823 int i, n;
1824 int ctrl_header_size;
1825 int trim_start = 0, trim_end = 0;
1826
1827 opus_samples = opus_get_packet_samples(s, pkt);
1828
1829 side_data = av_packet_get_side_data(pkt,
1830 AV_PKT_DATA_SKIP_SAMPLES,
1831 &side_data_size);
1832
1833 if (side_data && side_data_size >= 10) {
1834 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
1835 }
1836
1837 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
1838 if (ts_st->opus_pending_trim_start)
1839 ctrl_header_size += 2;
1840 if (trim_end)
1841 ctrl_header_size += 2;
1842
1843 data = av_malloc(ctrl_header_size);
1844 if (!data)
1845 return AVERROR(ENOMEM);
1846
1847 data[0] = 0x7f;
1848 data[1] = 0xe0;
1849 if (ts_st->opus_pending_trim_start)
1850 data[1] |= 0x10;
1851 if (trim_end)
1852 data[1] |= 0x08;
1853
1854 n = pkt->size;
1855 i = 2;
1856 do {
1857 data[i] = FFMIN(n, 255);
1858 n -= 255;
1859 i++;
1860 } while (n >= 0);
1861
1862 av_assert0(2 + pkt->size / 255 + 1 == i);
1863
1864 if (ts_st->opus_pending_trim_start) {
1865 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
1866 AV_WB16(data + i, trim_start);
1867 i += 2;
1868 ts_st->opus_pending_trim_start -= trim_start;
1869 }
1870 if (trim_end) {
1871 trim_end = FFMIN(trim_end, opus_samples - trim_start);
1872 AV_WB16(data + i, trim_end);
1873 i += 2;
1874 }
1875
1876 memcpy(data + i, pkt->data, pkt->size);
1877 buf = data;
1878 size = ctrl_header_size;
1879 } else {
1880 /* TODO: Can we get TS formatted data here? If so we will
1881 * need to count the samples of that too! */
1882 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
1883 }
1884 } else if (st->codecpar->codec_id == AV_CODEC_ID_AC3 && !ts_st->dvb_ac3_desc) {
1885 AC3HeaderInfo *hdr = NULL;
1886
1887 if (avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) >= 0) {
1888 uint8_t number_of_channels_flag;
1889 uint8_t service_type_flag;
1890 uint8_t full_service_flag = 1;
1891 DVBAC3Descriptor *dvb_ac3_desc;
1892
1893 dvb_ac3_desc = av_mallocz(sizeof(*dvb_ac3_desc));
1894 if (!dvb_ac3_desc) {
1895 av_free(hdr);
1896 return AVERROR(ENOMEM);
1897 }
1898
1899 service_type_flag = hdr->bitstream_mode;
1900 switch (hdr->channel_mode) {
1901 case AC3_CHMODE_DUALMONO:
1902 number_of_channels_flag = 1;
1903 break;
1904 case AC3_CHMODE_MONO:
1905 number_of_channels_flag = 0;
1906 break;
1907 case AC3_CHMODE_STEREO:
1908 if (hdr->dolby_surround_mode == AC3_DSURMOD_ON)
1909 number_of_channels_flag = 3;
1910 else
1911 number_of_channels_flag = 2;
1912 break;
1913 case AC3_CHMODE_3F:
1914 case AC3_CHMODE_2F1R:
1915 case AC3_CHMODE_3F1R:
1916 case AC3_CHMODE_2F2R:
1917 case AC3_CHMODE_3F2R:
1918 number_of_channels_flag = 4;
1919 break;
1920 default: /* reserved */
1921 number_of_channels_flag = 7;
1922 break;
1923 }
1924
1925 if (service_type_flag == 1 || service_type_flag == 4 ||
1926 (service_type_flag == 7 && !number_of_channels_flag))
1927 full_service_flag = 0;
1928
1929 dvb_ac3_desc->component_type_flag = 1;
1930 dvb_ac3_desc->component_type = (full_service_flag << 6) |
1931 ((service_type_flag & 0x7) << 3) |
1932 (number_of_channels_flag & 0x7);
1933 dvb_ac3_desc->bsid_flag = 1;
1934 dvb_ac3_desc->bsid = hdr->bitstream_id;
1935 dvb_ac3_desc->mainid_flag = 0;
1936 dvb_ac3_desc->asvc_flag = 0;
1937
1938 ts_st->dvb_ac3_desc = dvb_ac3_desc;
1939 }
1940 av_free(hdr);
1941 }
1942
1943 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
1944 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
1945 dts - ts_st->payload_dts >= max_audio_delay) ||
1946 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
1947 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1948 ts_st->payload_pts, ts_st->payload_dts,
1949 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
1950 ts_st->payload_size = 0;
1951 ts_st->opus_queued_samples = 0;
1952 }
1953
1954 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1955 av_assert0(!ts_st->payload_size);
1956 // for video and subtitle, write a single pes packet
1957 mpegts_write_pes(s, st, buf, size, pts, dts,
1958 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
1959 ts_st->opus_queued_samples = 0;
1960 av_free(data);
1961 return 0;
1962 }
1963
1964 if (!ts_st->payload_size) {
1965 ts_st->payload_pts = pts;
1966 ts_st->payload_dts = dts;
1967 ts_st->payload_flags = pkt->flags;
1968 }
1969
1970 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1971 ts_st->payload_size += size;
1972 ts_st->opus_queued_samples += opus_samples;
1973
1974 av_free(data);
1975
1976 return 0;
1977 }
1978
mpegts_write_flush(AVFormatContext * s)1979 static void mpegts_write_flush(AVFormatContext *s)
1980 {
1981 MpegTSWrite *ts = s->priv_data;
1982 int i;
1983
1984 /* flush current packets */
1985 for (i = 0; i < s->nb_streams; i++) {
1986 AVStream *st = s->streams[i];
1987 MpegTSWriteStream *ts_st = st->priv_data;
1988 if (ts_st->payload_size > 0) {
1989 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1990 ts_st->payload_pts, ts_st->payload_dts,
1991 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
1992 ts_st->payload_size = 0;
1993 ts_st->opus_queued_samples = 0;
1994 }
1995 }
1996
1997 if (ts->m2ts_mode) {
1998 int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
1999 while (packets++ < 32)
2000 mpegts_insert_null_packet(s);
2001 }
2002 }
2003
mpegts_write_packet(AVFormatContext * s,AVPacket * pkt)2004 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
2005 {
2006 if (!pkt) {
2007 mpegts_write_flush(s);
2008 return 1;
2009 } else {
2010 return mpegts_write_packet_internal(s, pkt);
2011 }
2012 }
2013
mpegts_write_end(AVFormatContext * s)2014 static int mpegts_write_end(AVFormatContext *s)
2015 {
2016 if (s->pb)
2017 mpegts_write_flush(s);
2018
2019 return 0;
2020 }
2021
mpegts_deinit(AVFormatContext * s)2022 static void mpegts_deinit(AVFormatContext *s)
2023 {
2024 MpegTSWrite *ts = s->priv_data;
2025 MpegTSService *service;
2026 int i;
2027
2028 av_packet_free(&ts->pkt);
2029
2030 for (i = 0; i < s->nb_streams; i++) {
2031 AVStream *st = s->streams[i];
2032 MpegTSWriteStream *ts_st = st->priv_data;
2033 if (ts_st) {
2034 av_freep(&ts_st->dvb_ac3_desc);
2035 av_freep(&ts_st->payload);
2036 if (ts_st->amux) {
2037 avformat_free_context(ts_st->amux);
2038 ts_st->amux = NULL;
2039 }
2040 }
2041 }
2042
2043 for (i = 0; i < ts->nb_services; i++) {
2044 service = ts->services[i];
2045 av_freep(&service);
2046 }
2047 av_freep(&ts->services);
2048 }
2049
mpegts_check_bitstream(struct AVFormatContext * s,const AVPacket * pkt)2050 static int mpegts_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
2051 {
2052 int ret = 1;
2053 AVStream *st = s->streams[pkt->stream_index];
2054
2055 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2056 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
2057 (AV_RB24(pkt->data) != 0x000001 ||
2058 (st->codecpar->extradata_size > 0 &&
2059 st->codecpar->extradata[0] == 1)))
2060 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
2061 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
2062 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
2063 (AV_RB24(pkt->data) != 0x000001 ||
2064 (st->codecpar->extradata_size > 0 &&
2065 st->codecpar->extradata[0] == 1)))
2066 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
2067 }
2068
2069 return ret;
2070 }
2071
2072 #define OFFSET(x) offsetof(MpegTSWrite, x)
2073 #define ENC AV_OPT_FLAG_ENCODING_PARAM
2074 static const AVOption options[] = {
2075 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
2076 OFFSET(transport_stream_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
2077 { "mpegts_original_network_id", "Set original_network_id field.",
2078 OFFSET(original_network_id), AV_OPT_TYPE_INT, { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, ENC },
2079 { "mpegts_service_id", "Set service_id field.",
2080 OFFSET(service_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
2081 { "mpegts_service_type", "Set service_type field.",
2082 OFFSET(service_type), AV_OPT_TYPE_INT, { .i64 = 0x01 }, 0x01, 0xff, ENC, "mpegts_service_type" },
2083 { "digital_tv", "Digital Television.",
2084 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2085 { "digital_radio", "Digital Radio.",
2086 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
2087 { "teletext", "Teletext.",
2088 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff, ENC, "mpegts_service_type" },
2089 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
2090 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
2091 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
2092 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2093 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
2094 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2095 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
2096 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2097 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
2098 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2099 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
2100 OFFSET(pmt_start_pid), AV_OPT_TYPE_INT, { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2101 { "mpegts_start_pid", "Set the first pid.",
2102 OFFSET(start_pid), AV_OPT_TYPE_INT, { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2103 { "mpegts_m2ts_mode", "Enable m2ts mode.", OFFSET(m2ts_mode), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2104 { "muxrate", NULL, OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
2105 { "pes_payload_size", "Minimum PES packet payload in bytes",
2106 OFFSET(pes_payload_size), AV_OPT_TYPE_INT, { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, ENC },
2107 { "mpegts_flags", "MPEG-TS muxing flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX, ENC, "mpegts_flags" },
2108 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
2109 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX, ENC, "mpegts_flags" },
2110 { "latm", "Use LATM packetization for AAC",
2111 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX, ENC, "mpegts_flags" },
2112 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
2113 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX, ENC, "mpegts_flags" },
2114 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
2115 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX, ENC, "mpegts_flags" },
2116 { "initial_discontinuity", "Mark initial packets as discontinuous",
2117 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX, ENC, "mpegts_flags" },
2118 { "mpegts_copyts", "don't offset dts/pts", OFFSET(copyts), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2119 { "tables_version", "set PAT, PMT and SDT version", OFFSET(tables_version), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 31, ENC },
2120 { "omit_video_pes_length", "Omit the PES packet length for video packets",
2121 OFFSET(omit_video_pes_length), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
2122 { "pcr_period", "PCR retransmission time in milliseconds",
2123 OFFSET(pcr_period_ms), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ENC },
2124 { "pat_period", "PAT/PMT retransmission time limit in seconds",
2125 OFFSET(pat_period_us), AV_OPT_TYPE_DURATION, { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2126 { "sdt_period", "SDT retransmission time limit in seconds",
2127 OFFSET(sdt_period_us), AV_OPT_TYPE_DURATION, { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2128 { NULL },
2129 };
2130
2131 static const AVClass mpegts_muxer_class = {
2132 .class_name = "MPEGTS muxer",
2133 .item_name = av_default_item_name,
2134 .option = options,
2135 .version = LIBAVUTIL_VERSION_INT,
2136 };
2137
2138 AVOutputFormat ff_mpegts_muxer = {
2139 .name = "mpegts",
2140 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2141 .mime_type = "video/MP2T",
2142 .extensions = "ts,m2t,m2ts,mts",
2143 .priv_data_size = sizeof(MpegTSWrite),
2144 .audio_codec = AV_CODEC_ID_MP2,
2145 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2146 .init = mpegts_init,
2147 .write_packet = mpegts_write_packet,
2148 .write_trailer = mpegts_write_end,
2149 .deinit = mpegts_deinit,
2150 .check_bitstream = mpegts_check_bitstream,
2151 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2152 .priv_class = &mpegts_muxer_class,
2153 };
2154