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/startcode.h"
32
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "internal.h"
36 #include "mpegts.h"
37 #include "mux.h"
38
39 #define PCR_TIME_BASE 27000000
40
41 /* write DVB SI sections */
42
43 #define DVB_PRIVATE_NETWORK_START 0xff01
44
45 /*********************************************/
46 /* mpegts section writer */
47
48 typedef struct MpegTSSection {
49 int pid;
50 int cc;
51 int discontinuity;
52 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
53 void *opaque;
54 } MpegTSSection;
55
56 typedef struct MpegTSService {
57 MpegTSSection pmt; /* MPEG-2 PMT table context */
58 int sid; /* service ID */
59 uint8_t name[256];
60 uint8_t provider_name[256];
61 int pcr_pid;
62 AVProgram *program;
63 } MpegTSService;
64
65 // service_type values as defined in ETSI 300 468
66 enum {
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 };
76 typedef struct MpegTSWrite {
77 const AVClass *av_class;
78 MpegTSSection pat; /* MPEG-2 PAT table */
79 MpegTSSection sdt; /* MPEG-2 SDT table context */
80 MpegTSSection nit; /* MPEG-2 NIT table context */
81 MpegTSService **services;
82 AVPacket *pkt;
83 int64_t sdt_period; /* SDT period in PCR time base */
84 int64_t pat_period; /* PAT/PMT period in PCR time base */
85 int64_t nit_period; /* NIT period in PCR time base */
86 int nb_services;
87 int64_t first_pcr;
88 int first_dts_checked;
89 int64_t next_pcr;
90 int mux_rate; ///< set to 1 when VBR
91 int pes_payload_size;
92 int64_t total_size;
93
94 int transport_stream_id;
95 int original_network_id;
96 int service_id;
97 int service_type;
98
99 int pmt_start_pid;
100 int start_pid;
101 int m2ts_mode;
102 int m2ts_video_pid;
103 int m2ts_audio_pid;
104 int m2ts_pgssub_pid;
105 int m2ts_textsub_pid;
106
107 int pcr_period_ms;
108 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
109 #define MPEGTS_FLAG_AAC_LATM 0x02
110 #define MPEGTS_FLAG_PAT_PMT_AT_FRAMES 0x04
111 #define MPEGTS_FLAG_SYSTEM_B 0x08
112 #define MPEGTS_FLAG_DISCONT 0x10
113 #define MPEGTS_FLAG_NIT 0x20
114 int flags;
115 int copyts;
116 int tables_version;
117 int64_t pat_period_us;
118 int64_t sdt_period_us;
119 int64_t nit_period_us;
120 int64_t last_pat_ts;
121 int64_t last_sdt_ts;
122 int64_t last_nit_ts;
123
124 uint8_t provider_name[256];
125
126 int omit_video_pes_length;
127 } MpegTSWrite;
128
129 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
130 #define DEFAULT_PES_HEADER_FREQ 16
131 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
132
133 /* The section length is 12 bits. The first 2 are set to 0, the remaining
134 * 10 bits should not exceed 1021. */
135 #define SECTION_LENGTH 1020
136
137 /* NOTE: 4 bytes must be left at the end for the crc32 */
mpegts_write_section(MpegTSSection * s,uint8_t * buf,int len)138 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
139 {
140 unsigned int crc;
141 unsigned char packet[TS_PACKET_SIZE];
142 const unsigned char *buf_ptr;
143 unsigned char *q;
144 int first, b, len1, left;
145
146 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
147 -1, buf, len - 4));
148
149 buf[len - 4] = (crc >> 24) & 0xff;
150 buf[len - 3] = (crc >> 16) & 0xff;
151 buf[len - 2] = (crc >> 8) & 0xff;
152 buf[len - 1] = crc & 0xff;
153
154 /* send each packet */
155 buf_ptr = buf;
156 while (len > 0) {
157 first = buf == buf_ptr;
158 q = packet;
159 *q++ = 0x47;
160 b = s->pid >> 8;
161 if (first)
162 b |= 0x40;
163 *q++ = b;
164 *q++ = s->pid;
165 s->cc = s->cc + 1 & 0xf;
166 *q++ = 0x10 | s->cc;
167 if (s->discontinuity) {
168 q[-1] |= 0x20;
169 *q++ = 1;
170 *q++ = 0x80;
171 s->discontinuity = 0;
172 }
173 if (first)
174 *q++ = 0; /* 0 offset */
175 len1 = TS_PACKET_SIZE - (q - packet);
176 if (len1 > len)
177 len1 = len;
178 memcpy(q, buf_ptr, len1);
179 q += len1;
180 /* add known padding data */
181 left = TS_PACKET_SIZE - (q - packet);
182 if (left > 0)
183 memset(q, 0xff, left);
184
185 s->write_packet(s, packet);
186
187 buf_ptr += len1;
188 len -= len1;
189 }
190 }
191
put16(uint8_t ** q_ptr,int val)192 static inline void put16(uint8_t **q_ptr, int val)
193 {
194 uint8_t *q;
195 q = *q_ptr;
196 *q++ = val >> 8;
197 *q++ = val;
198 *q_ptr = q;
199 }
200
mpegts_write_section1(MpegTSSection * s,int tid,int id,int version,int sec_num,int last_sec_num,uint8_t * buf,int len)201 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
202 int version, int sec_num, int last_sec_num,
203 uint8_t *buf, int len)
204 {
205 uint8_t section[1024], *q;
206 unsigned int tot_len;
207 /* reserved_future_use field must be set to 1 for SDT and NIT */
208 unsigned int flags = (tid == SDT_TID || tid == NIT_TID) ? 0xf000 : 0xb000;
209
210 tot_len = 3 + 5 + len + 4;
211 /* check if not too big */
212 if (tot_len > 1024)
213 return AVERROR_INVALIDDATA;
214
215 q = section;
216 *q++ = tid;
217 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
218 put16(&q, id);
219 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
220 *q++ = sec_num;
221 *q++ = last_sec_num;
222 memcpy(q, buf, len);
223
224 mpegts_write_section(s, section, tot_len);
225 return 0;
226 }
227
228 /*********************************************/
229 /* mpegts writer */
230
231 #define DEFAULT_PROVIDER_NAME "FFmpeg"
232 #define DEFAULT_SERVICE_NAME "Service"
233
234 /* we retransmit the SI info at this rate */
235 #define SDT_RETRANS_TIME 500
236 #define PAT_RETRANS_TIME 100
237 #define PCR_RETRANS_TIME 20
238 #define NIT_RETRANS_TIME 500
239
240 typedef struct MpegTSWriteStream {
241 int pid; /* stream associated pid */
242 int cc;
243 int discontinuity;
244 int payload_size;
245 int first_timestamp_checked; ///< first pts/dts check needed
246 int prev_payload_key;
247 int64_t payload_pts;
248 int64_t payload_dts;
249 int payload_flags;
250 uint8_t *payload;
251 AVFormatContext *amux;
252 int data_st_warning;
253
254 int64_t pcr_period; /* PCR period in PCR time base */
255 int64_t last_pcr;
256
257 /* For Opus */
258 int opus_queued_samples;
259 int opus_pending_trim_start;
260
261 DVBAC3Descriptor *dvb_ac3_desc;
262 } MpegTSWriteStream;
263
mpegts_write_pat(AVFormatContext * s)264 static void mpegts_write_pat(AVFormatContext *s)
265 {
266 MpegTSWrite *ts = s->priv_data;
267 MpegTSService *service;
268 uint8_t data[SECTION_LENGTH], *q;
269 int i;
270
271 q = data;
272 if (ts->flags & MPEGTS_FLAG_NIT) {
273 put16(&q, 0x0000);
274 put16(&q, NIT_PID);
275 }
276 for (i = 0; i < ts->nb_services; i++) {
277 service = ts->services[i];
278 put16(&q, service->sid);
279 put16(&q, 0xe000 | service->pmt.pid);
280 }
281 mpegts_write_section1(&ts->pat, PAT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
282 data, q - data);
283 }
284
putbuf(uint8_t ** q_ptr,const uint8_t * buf,size_t len)285 static void putbuf(uint8_t **q_ptr, const uint8_t *buf, size_t len)
286 {
287 memcpy(*q_ptr, buf, len);
288 *q_ptr += len;
289 }
290
put_arib_caption_descriptor(AVFormatContext * s,uint8_t ** q_ptr,AVCodecParameters * codecpar)291 static int put_arib_caption_descriptor(AVFormatContext *s, uint8_t **q_ptr,
292 AVCodecParameters *codecpar)
293 {
294 uint8_t stream_identifier;
295 uint16_t data_component_id;
296 uint8_t *q = *q_ptr;
297
298 switch (codecpar->profile) {
299 case FF_PROFILE_ARIB_PROFILE_A:
300 stream_identifier = 0x30;
301 data_component_id = 0x0008;
302 break;
303 case FF_PROFILE_ARIB_PROFILE_C:
304 stream_identifier = 0x87;
305 data_component_id = 0x0012;
306 break;
307 default:
308 av_log(s, AV_LOG_ERROR,
309 "Unset/unknown ARIB caption profile %d utilized!\n",
310 codecpar->profile);
311 return AVERROR_INVALIDDATA;
312 }
313
314 // stream_identifier_descriptor
315 *q++ = 0x52; // descriptor_tag
316 *q++ = 1; // descriptor_length
317 *q++ = stream_identifier; // component_tag: stream_identifier
318
319 // data_component_descriptor, defined in ARIB STD-B10, part 2, 6.2.20
320 *q++ = 0xFD; // descriptor_tag: ARIB data coding type descriptor
321 *q++ = 3; // descriptor_length
322 put16(&q, data_component_id); // data_component_id
323 // additional_arib_caption_info: defined in ARIB STD-B24, fascicle 1, Part 3, 9.6.1
324 // Here we utilize a pre-defined set of values defined in ARIB TR-B14,
325 // Fascicle 2, 4.2.8.5 for PMT usage, with the reserved bits in the middle
326 // set to 1 (as that is what every broadcaster seems to be doing in
327 // production).
328 *q++ = 0x3D; // DMF('0011'), Reserved('11'), Timing('01')
329
330 *q_ptr = q;
331
332 return 0;
333 }
334
put_registration_descriptor(uint8_t ** q_ptr,uint32_t tag)335 static void put_registration_descriptor(uint8_t **q_ptr, uint32_t tag)
336 {
337 uint8_t *q = *q_ptr;
338 *q++ = REGISTRATION_DESCRIPTOR;
339 *q++ = 4;
340 *q++ = tag;
341 *q++ = tag >> 8;
342 *q++ = tag >> 16;
343 *q++ = tag >> 24;
344 *q_ptr = q;
345 }
346
get_dvb_stream_type(AVFormatContext * s,AVStream * st)347 static int get_dvb_stream_type(AVFormatContext *s, AVStream *st)
348 {
349 MpegTSWrite *ts = s->priv_data;
350 MpegTSWriteStream *ts_st = st->priv_data;
351 int stream_type;
352
353 switch (st->codecpar->codec_id) {
354 case AV_CODEC_ID_MPEG1VIDEO:
355 case AV_CODEC_ID_MPEG2VIDEO:
356 stream_type = STREAM_TYPE_VIDEO_MPEG2;
357 break;
358 case AV_CODEC_ID_MPEG4:
359 stream_type = STREAM_TYPE_VIDEO_MPEG4;
360 break;
361 case AV_CODEC_ID_H264:
362 stream_type = STREAM_TYPE_VIDEO_H264;
363 break;
364 case AV_CODEC_ID_HEVC:
365 stream_type = STREAM_TYPE_VIDEO_HEVC;
366 break;
367 case AV_CODEC_ID_CAVS:
368 stream_type = STREAM_TYPE_VIDEO_CAVS;
369 break;
370 case AV_CODEC_ID_AVS2:
371 stream_type = STREAM_TYPE_VIDEO_AVS2;
372 break;
373 case AV_CODEC_ID_AVS3:
374 stream_type = STREAM_TYPE_VIDEO_AVS3;
375 break;
376 case AV_CODEC_ID_DIRAC:
377 stream_type = STREAM_TYPE_VIDEO_DIRAC;
378 break;
379 case AV_CODEC_ID_VC1:
380 stream_type = STREAM_TYPE_VIDEO_VC1;
381 break;
382 case AV_CODEC_ID_MP2:
383 case AV_CODEC_ID_MP3:
384 if ( st->codecpar->sample_rate > 0
385 && st->codecpar->sample_rate < 32000) {
386 stream_type = STREAM_TYPE_AUDIO_MPEG2;
387 } else {
388 stream_type = STREAM_TYPE_AUDIO_MPEG1;
389 }
390 break;
391 case AV_CODEC_ID_AAC:
392 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
393 ? STREAM_TYPE_AUDIO_AAC_LATM
394 : STREAM_TYPE_AUDIO_AAC;
395 break;
396 case AV_CODEC_ID_AAC_LATM:
397 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
398 break;
399 case AV_CODEC_ID_AC3:
400 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
401 ? STREAM_TYPE_PRIVATE_DATA
402 : STREAM_TYPE_AUDIO_AC3;
403 break;
404 case AV_CODEC_ID_EAC3:
405 stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
406 ? STREAM_TYPE_PRIVATE_DATA
407 : STREAM_TYPE_AUDIO_EAC3;
408 break;
409 case AV_CODEC_ID_DTS:
410 stream_type = STREAM_TYPE_AUDIO_DTS;
411 break;
412 case AV_CODEC_ID_PCM_S16BE:
413 stream_type = 0x83;
414 break;
415 case AV_CODEC_ID_TRUEHD:
416 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
417 break;
418 case AV_CODEC_ID_OPUS:
419 stream_type = STREAM_TYPE_PRIVATE_DATA;
420 break;
421 case AV_CODEC_ID_TIMED_ID3:
422 stream_type = STREAM_TYPE_METADATA;
423 break;
424 case AV_CODEC_ID_DVB_SUBTITLE:
425 case AV_CODEC_ID_DVB_TELETEXT:
426 case AV_CODEC_ID_ARIB_CAPTION:
427 stream_type = STREAM_TYPE_PRIVATE_DATA;
428 break;
429 case AV_CODEC_ID_SMPTE_KLV:
430 if (st->codecpar->profile == FF_PROFILE_KLVA_SYNC) {
431 stream_type = STREAM_TYPE_METADATA;
432 } else {
433 stream_type = STREAM_TYPE_PRIVATE_DATA;
434 }
435 break;
436 #ifdef OHOS_AV3A_DEMUXER
437 case AV_CODEC_ID_AVS3DA:
438 stream_type = STREAM_TYPE_AUDIO_AV3A;
439 break;
440 #endif
441 default:
442 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
443 "Stream %d, codec %s, is muxed as a private data stream "
444 "and may not be recognized upon reading.\n", st->index,
445 avcodec_get_name(st->codecpar->codec_id));
446 stream_type = STREAM_TYPE_PRIVATE_DATA;
447 break;
448 }
449
450 return stream_type;
451 }
452
get_m2ts_stream_type(AVFormatContext * s,AVStream * st)453 static int get_m2ts_stream_type(AVFormatContext *s, AVStream *st)
454 {
455 int stream_type;
456 MpegTSWriteStream *ts_st = st->priv_data;
457
458 switch (st->codecpar->codec_id) {
459 case AV_CODEC_ID_MPEG2VIDEO:
460 stream_type = STREAM_TYPE_VIDEO_MPEG2;
461 break;
462 case AV_CODEC_ID_H264:
463 stream_type = STREAM_TYPE_VIDEO_H264;
464 break;
465 case AV_CODEC_ID_VC1:
466 stream_type = STREAM_TYPE_VIDEO_VC1;
467 break;
468 case AV_CODEC_ID_HEVC:
469 stream_type = STREAM_TYPE_VIDEO_HEVC;
470 break;
471 case AV_CODEC_ID_PCM_BLURAY:
472 stream_type = 0x80;
473 break;
474 case AV_CODEC_ID_AC3:
475 stream_type = 0x81;
476 break;
477 case AV_CODEC_ID_DTS:
478 stream_type = (st->codecpar->ch_layout.nb_channels > 6) ? 0x85 : 0x82;
479 break;
480 case AV_CODEC_ID_PCM_S16BE:
481 stream_type = 0x83;
482 break;
483 case AV_CODEC_ID_TRUEHD:
484 stream_type = 0x83;
485 break;
486 case AV_CODEC_ID_EAC3:
487 stream_type = 0x84;
488 break;
489 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
490 stream_type = 0x90;
491 break;
492 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
493 stream_type = 0x92;
494 break;
495 default:
496 av_log_once(s, AV_LOG_WARNING, AV_LOG_DEBUG, &ts_st->data_st_warning,
497 "Stream %d, codec %s, is muxed as a private data stream "
498 "and may not be recognized upon reading.\n", st->index,
499 avcodec_get_name(st->codecpar->codec_id));
500 stream_type = STREAM_TYPE_PRIVATE_DATA;
501 break;
502 }
503
504 return stream_type;
505 }
506
mpegts_write_pmt(AVFormatContext * s,MpegTSService * service)507 static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
508 {
509 MpegTSWrite *ts = s->priv_data;
510 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
511 int val, stream_type, i, err = 0;
512
513 q = data;
514 put16(&q, 0xe000 | service->pcr_pid);
515
516 program_info_length_ptr = q;
517 q += 2; /* patched after */
518
519 /* put program info here */
520 if (ts->m2ts_mode) {
521 put_registration_descriptor(&q, MKTAG('H', 'D', 'M', 'V'));
522 *q++ = 0x88; // descriptor_tag - hdmv_copy_control_descriptor
523 *q++ = 0x04; // descriptor_length
524 put16(&q, 0x0fff); // CA_System_ID
525 *q++ = 0xfc; // private_data_byte
526 *q++ = 0xfc; // private_data_byte
527 }
528
529 val = 0xf000 | (q - program_info_length_ptr - 2);
530 program_info_length_ptr[0] = val >> 8;
531 program_info_length_ptr[1] = val;
532
533 for (i = 0; i < s->nb_streams; i++) {
534 AVStream *st = s->streams[i];
535 MpegTSWriteStream *ts_st = st->priv_data;
536 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
537 const char default_language[] = "und";
538 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
539 enum AVCodecID codec_id = st->codecpar->codec_id;
540
541 if (s->nb_programs) {
542 int k, found = 0;
543 AVProgram *program = service->program;
544
545 for (k = 0; k < program->nb_stream_indexes; k++)
546 if (program->stream_index[k] == i) {
547 found = 1;
548 break;
549 }
550
551 if (!found)
552 continue;
553 }
554
555 if (q - data > SECTION_LENGTH - 32) {
556 err = 1;
557 break;
558 }
559
560 stream_type = ts->m2ts_mode ? get_m2ts_stream_type(s, st) : get_dvb_stream_type(s, st);
561
562 *q++ = stream_type;
563 put16(&q, 0xe000 | ts_st->pid);
564 desc_length_ptr = q;
565 q += 2; /* patched after */
566
567 /* write optional descriptors here */
568 switch (st->codecpar->codec_type) {
569 case AVMEDIA_TYPE_AUDIO:
570 if (codec_id == AV_CODEC_ID_PCM_S16BE) {
571 *q++ = 0x83; // descriptor_tag
572 *q++ = 2; // descriptor_length
573
574 unsigned sampling_frequency = 2; // 1 - 44.1k, 2 - 48k
575 *q++ = (sampling_frequency << 5) // sampling_frequency
576 | (3 << 1) // reserved
577 | 0; // emphasis_flag
578
579 *q++ =
580 (1 << 5) // 1 - number_of_channels = stereo
581 | 0xf; // reserved
582 }
583 if (codec_id == AV_CODEC_ID_AC3)
584 put_registration_descriptor(&q, MKTAG('A', 'C', '-', '3'));
585 if (codec_id == AV_CODEC_ID_EAC3)
586 put_registration_descriptor(&q, MKTAG('E', 'A', 'C', '3'));
587 if (ts->flags & MPEGTS_FLAG_SYSTEM_B) {
588 if (codec_id == AV_CODEC_ID_AC3) {
589 DVBAC3Descriptor *dvb_ac3_desc = ts_st->dvb_ac3_desc;
590
591 *q++=0x6a; // AC3 descriptor see A038 DVB SI
592 if (dvb_ac3_desc) {
593 int len = 1 +
594 !!(dvb_ac3_desc->component_type_flag) +
595 !!(dvb_ac3_desc->bsid_flag) +
596 !!(dvb_ac3_desc->mainid_flag) +
597 !!(dvb_ac3_desc->asvc_flag);
598
599 *q++ = len;
600 *q++ = dvb_ac3_desc->component_type_flag << 7 | dvb_ac3_desc->bsid_flag << 6 |
601 dvb_ac3_desc->mainid_flag << 5 | dvb_ac3_desc->asvc_flag << 4;
602
603 if (dvb_ac3_desc->component_type_flag) *q++ = dvb_ac3_desc->component_type;
604 if (dvb_ac3_desc->bsid_flag) *q++ = dvb_ac3_desc->bsid;
605 if (dvb_ac3_desc->mainid_flag) *q++ = dvb_ac3_desc->mainid;
606 if (dvb_ac3_desc->asvc_flag) *q++ = dvb_ac3_desc->asvc;
607 } else {
608 *q++=1; // 1 byte, all flags sets to 0
609 *q++=0; // omit all fields...
610 }
611 } else if (codec_id == AV_CODEC_ID_EAC3) {
612 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
613 *q++=1; // 1 byte, all flags sets to 0
614 *q++=0; // omit all fields...
615 }
616 }
617 if (codec_id == AV_CODEC_ID_S302M)
618 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));
619 if (codec_id == AV_CODEC_ID_OPUS) {
620 int ch = st->codecpar->ch_layout.nb_channels;
621
622 /* 6 bytes registration descriptor, 4 bytes Opus audio descriptor */
623 if (q - data > SECTION_LENGTH - 6 - 4) {
624 err = 1;
625 break;
626 }
627
628 put_registration_descriptor(&q, MKTAG('O', 'p', 'u', 's'));
629
630 *q++ = 0x7f; /* DVB extension descriptor */
631 *q++ = 2;
632 *q++ = 0x80;
633
634 if (st->codecpar->extradata && st->codecpar->extradata_size >= 19) {
635 if (st->codecpar->extradata[18] == 0 && ch <= 2) {
636 /* RTP mapping family */
637 *q++ = ch;
638 } else if (st->codecpar->extradata[18] == 1 && ch <= 8 &&
639 st->codecpar->extradata_size >= 21 + ch) {
640 static const uint8_t coupled_stream_counts[9] = {
641 1, 0, 1, 1, 2, 2, 2, 3, 3
642 };
643 static const uint8_t channel_map_a[8][8] = {
644 {0},
645 {0, 1},
646 {0, 2, 1},
647 {0, 1, 2, 3},
648 {0, 4, 1, 2, 3},
649 {0, 4, 1, 2, 3, 5},
650 {0, 4, 1, 2, 3, 5, 6},
651 {0, 6, 1, 2, 3, 4, 5, 7},
652 };
653 static const uint8_t channel_map_b[8][8] = {
654 {0},
655 {0, 1},
656 {0, 1, 2},
657 {0, 1, 2, 3},
658 {0, 1, 2, 3, 4},
659 {0, 1, 2, 3, 4, 5},
660 {0, 1, 2, 3, 4, 5, 6},
661 {0, 1, 2, 3, 4, 5, 6, 7},
662 };
663 /* Vorbis mapping family */
664
665 if (st->codecpar->extradata[19] == ch - coupled_stream_counts[ch] &&
666 st->codecpar->extradata[20] == coupled_stream_counts[ch] &&
667 memcmp(&st->codecpar->extradata[21], channel_map_a[ch - 1], ch) == 0) {
668 *q++ = ch;
669 } else if (ch >= 2 && st->codecpar->extradata[19] == ch &&
670 st->codecpar->extradata[20] == 0 &&
671 memcmp(&st->codecpar->extradata[21], channel_map_b[ch - 1], ch) == 0) {
672 *q++ = ch | 0x80;
673 } else {
674 /* Unsupported, could write an extended descriptor here */
675 av_log(s, AV_LOG_ERROR, "Unsupported Opus Vorbis-style channel mapping");
676 *q++ = 0xff;
677 }
678 } else {
679 /* Unsupported */
680 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping for family %d", st->codecpar->extradata[18]);
681 *q++ = 0xff;
682 }
683 } else if (ch <= 2) {
684 /* Assume RTP mapping family */
685 *q++ = ch;
686 } else {
687 /* Unsupported */
688 av_log(s, AV_LOG_ERROR, "Unsupported Opus channel mapping");
689 *q++ = 0xff;
690 }
691 }
692
693 if (language != default_language ||
694 st->disposition & (AV_DISPOSITION_CLEAN_EFFECTS |
695 AV_DISPOSITION_HEARING_IMPAIRED |
696 AV_DISPOSITION_VISUAL_IMPAIRED)) {
697 const char *p, *next;
698 uint8_t *len_ptr;
699
700 *q++ = ISO_639_LANGUAGE_DESCRIPTOR;
701 len_ptr = q++;
702 *len_ptr = 0;
703
704 for (p = next = language; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
705 if (q - data > SECTION_LENGTH - 4) {
706 err = 1;
707 break;
708 }
709 next = strchr(p, ',');
710 if (strlen(p) != 3 && (!next || next != p + 3))
711 continue; /* not a 3-letter code */
712
713 *q++ = *p++;
714 *q++ = *p++;
715 *q++ = *p++;
716
717 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
718 *q++ = 0x01;
719 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
720 *q++ = 0x02;
721 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
722 *q++ = 0x03;
723 else
724 *q++ = 0; /* undefined type */
725
726 *len_ptr += 4;
727 }
728
729 if (*len_ptr == 0)
730 q -= 2; /* no language codes were written */
731 }
732 break;
733 case AVMEDIA_TYPE_SUBTITLE:
734 if (codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
735 uint8_t *len_ptr;
736 int extradata_copied = 0;
737
738 *q++ = 0x59; /* subtitling_descriptor */
739 len_ptr = q++;
740
741 while (strlen(language) >= 3) {
742 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
743 err = 1;
744 break;
745 }
746 *q++ = *language++;
747 *q++ = *language++;
748 *q++ = *language++;
749 /* Skip comma */
750 if (*language != '\0')
751 language++;
752
753 if (st->codecpar->extradata_size - extradata_copied >= 5) {
754 *q++ = st->codecpar->extradata[extradata_copied + 4]; /* subtitling_type */
755 memcpy(q, st->codecpar->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
756 extradata_copied += 5;
757 q += 4;
758 } else {
759 /* subtitling_type:
760 * 0x10 - normal with no monitor aspect ratio criticality
761 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
762 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
763 if ((st->codecpar->extradata_size == 4) && (extradata_copied == 0)) {
764 /* support of old 4-byte extradata format */
765 memcpy(q, st->codecpar->extradata, 4); /* composition_page_id and ancillary_page_id */
766 extradata_copied += 4;
767 q += 4;
768 } else {
769 put16(&q, 1); /* composition_page_id */
770 put16(&q, 1); /* ancillary_page_id */
771 }
772 }
773 }
774
775 *len_ptr = q - len_ptr - 1;
776 } else if (codec_id == AV_CODEC_ID_DVB_TELETEXT) {
777 uint8_t *len_ptr = NULL;
778 int extradata_copied = 0;
779
780 /* The descriptor tag. teletext_descriptor */
781 *q++ = 0x56;
782 len_ptr = q++;
783
784 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
785 *q++ = *language++;
786 *q++ = *language++;
787 *q++ = *language++;
788 /* Skip comma */
789 if (*language != '\0')
790 language++;
791
792 if (st->codecpar->extradata_size - 1 > extradata_copied) {
793 memcpy(q, st->codecpar->extradata + extradata_copied, 2);
794 extradata_copied += 2;
795 q += 2;
796 } else {
797 /* The Teletext descriptor:
798 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
799 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
800 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
801 *q++ = 0x08;
802 *q++ = 0x00;
803 }
804 }
805
806 *len_ptr = q - len_ptr - 1;
807 } else if (codec_id == AV_CODEC_ID_ARIB_CAPTION) {
808 if (put_arib_caption_descriptor(s, &q, st->codecpar) < 0)
809 break;
810 }
811 break;
812 case AVMEDIA_TYPE_VIDEO:
813 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
814 put_registration_descriptor(&q, MKTAG('d', 'r', 'a', 'c'));
815 } else if (stream_type == STREAM_TYPE_VIDEO_VC1) {
816 put_registration_descriptor(&q, MKTAG('V', 'C', '-', '1'));
817 } else if (stream_type == STREAM_TYPE_VIDEO_HEVC && s->strict_std_compliance <= FF_COMPLIANCE_NORMAL) {
818 put_registration_descriptor(&q, MKTAG('H', 'E', 'V', 'C'));
819 } else if (stream_type == STREAM_TYPE_VIDEO_CAVS || stream_type == STREAM_TYPE_VIDEO_AVS2 ||
820 stream_type == STREAM_TYPE_VIDEO_AVS3) {
821 put_registration_descriptor(&q, MKTAG('A', 'V', 'S', 'V'));
822 }
823 break;
824 case AVMEDIA_TYPE_DATA:
825 if (codec_id == AV_CODEC_ID_SMPTE_KLV) {
826 put_registration_descriptor(&q, MKTAG('K', 'L', 'V', 'A'));
827 } else if (codec_id == AV_CODEC_ID_TIMED_ID3) {
828 const char *tag = "ID3 ";
829 *q++ = METADATA_DESCRIPTOR;
830 *q++ = 13;
831 put16(&q, 0xffff); /* metadata application format */
832 putbuf(&q, tag, strlen(tag));
833 *q++ = 0xff; /* metadata format */
834 putbuf(&q, tag, strlen(tag));
835 *q++ = 0; /* metadata service ID */
836 *q++ = 0xF; /* metadata_locator_record_flag|MPEG_carriage_flags|reserved */
837 }
838 break;
839 }
840
841 val = 0xf000 | (q - desc_length_ptr - 2);
842 desc_length_ptr[0] = val >> 8;
843 desc_length_ptr[1] = val;
844 }
845
846 if (err)
847 av_log(s, AV_LOG_ERROR,
848 "The PMT section cannot fit stream %d and all following streams.\n"
849 "Try reducing the number of languages in the audio streams "
850 "or the total number of streams.\n", i);
851
852 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
853 data, q - data);
854 return 0;
855 }
856
mpegts_write_sdt(AVFormatContext * s)857 static void mpegts_write_sdt(AVFormatContext *s)
858 {
859 MpegTSWrite *ts = s->priv_data;
860 MpegTSService *service;
861 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
862 int i, running_status, free_ca_mode, val;
863
864 q = data;
865 put16(&q, ts->original_network_id);
866 *q++ = 0xff;
867 for (i = 0; i < ts->nb_services; i++) {
868 service = ts->services[i];
869 put16(&q, service->sid);
870 *q++ = 0xfc | 0x00; /* currently no EIT info */
871 desc_list_len_ptr = q;
872 q += 2;
873 running_status = 4; /* running */
874 free_ca_mode = 0;
875
876 /* write only one descriptor for the service name and provider */
877 *q++ = 0x48;
878 desc_len_ptr = q;
879 q++;
880 *q++ = ts->service_type;
881 putbuf(&q, service->provider_name, service->provider_name[0] + 1);
882 putbuf(&q, service->name, service->name[0] + 1);
883 desc_len_ptr[0] = q - desc_len_ptr - 1;
884
885 /* fill descriptor length */
886 val = (running_status << 13) | (free_ca_mode << 12) |
887 (q - desc_list_len_ptr - 2);
888 desc_list_len_ptr[0] = val >> 8;
889 desc_list_len_ptr[1] = val;
890 }
891 mpegts_write_section1(&ts->sdt, SDT_TID, ts->transport_stream_id, ts->tables_version, 0, 0,
892 data, q - data);
893 }
894
mpegts_write_nit(AVFormatContext * s)895 static void mpegts_write_nit(AVFormatContext *s)
896 {
897 MpegTSWrite *ts = s->priv_data;
898 uint8_t data[SECTION_LENGTH], *q, *desc_len_ptr, *loop_len_ptr;
899
900 q = data;
901
902 //network_descriptors_length
903 put16(&q, 0xf000 | (ts->provider_name[0] + 2));
904
905 //network_name_descriptor
906 *q++ = 0x40;
907 putbuf(&q, ts->provider_name, ts->provider_name[0] + 1);
908
909 //transport_stream_loop_length
910 loop_len_ptr = q;
911 q += 2;
912
913 put16(&q, ts->transport_stream_id);
914 put16(&q, ts->original_network_id);
915
916 //transport_descriptors_length
917 desc_len_ptr = q;
918 q += 2;
919
920 //service_list_descriptor
921 *q++ = 0x41;
922 *q++ = 3 * ts->nb_services;
923 for (int i = 0; i < ts->nb_services; i++) {
924 put16(&q, ts->services[i]->sid);
925 *q++ = ts->service_type;
926 }
927
928 //calculate lengths
929 put16(&desc_len_ptr, 0xf000 | q - (desc_len_ptr + 2));
930 put16(&loop_len_ptr, 0xf000 | q - (loop_len_ptr + 2));
931
932 mpegts_write_section1(&ts->nit, NIT_TID, ts->original_network_id, ts->tables_version, 0, 0,
933 data, q - data);
934 }
935
936 /* This stores a string in buf with the correct encoding and also sets the
937 * first byte as the length. !str is accepted for an empty string.
938 * If the string is already encoded, invalid UTF-8 or has no multibyte sequence
939 * then we keep it as is, otherwise we signal UTF-8 encoding. */
encode_str8(uint8_t * buf,const char * str)940 static int encode_str8(uint8_t *buf, const char *str)
941 {
942 size_t str_len;
943 if (!str)
944 str = "";
945 str_len = strlen(str);
946 if (str[0] && (unsigned)str[0] >= 0x20) { /* Make sure the string is not already encoded. */
947 const uint8_t *q = str;
948 int has_multibyte = 0;
949 while (*q) {
950 uint32_t code;
951 GET_UTF8(code, *q++, goto invalid;) /* Is it valid UTF-8? */
952 has_multibyte |= (code > 127); /* Does it have multibyte UTF-8 chars in it? */
953 }
954 if (has_multibyte) { /* If we have multibyte chars and valid UTF-8, then encode as such! */
955 if (str_len > 254)
956 return AVERROR(EINVAL);
957 buf[0] = str_len + 1;
958 buf[1] = 0x15;
959 memcpy(&buf[2], str, str_len);
960 return 0;
961 }
962 }
963 invalid:
964 /* Otherwise let's just encode the string as is! */
965 if (str_len > 255)
966 return AVERROR(EINVAL);
967 buf[0] = str_len;
968 memcpy(&buf[1], str, str_len);
969 return 0;
970 }
971
get_pcr(const MpegTSWrite * ts)972 static int64_t get_pcr(const MpegTSWrite *ts)
973 {
974 return av_rescale(ts->total_size + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
975 ts->first_pcr;
976 }
977
write_packet(AVFormatContext * s,const uint8_t * packet)978 static void write_packet(AVFormatContext *s, const uint8_t *packet)
979 {
980 MpegTSWrite *ts = s->priv_data;
981 if (ts->m2ts_mode) {
982 int64_t pcr = get_pcr(s->priv_data);
983 uint32_t tp_extra_header = pcr % 0x3fffffff;
984 tp_extra_header = AV_RB32(&tp_extra_header);
985 avio_write(s->pb, (unsigned char *) &tp_extra_header,
986 sizeof(tp_extra_header));
987 }
988 avio_write(s->pb, packet, TS_PACKET_SIZE);
989 ts->total_size += TS_PACKET_SIZE;
990 }
991
section_write_packet(MpegTSSection * s,const uint8_t * packet)992 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
993 {
994 AVFormatContext *ctx = s->opaque;
995 write_packet(ctx, packet);
996 }
997
mpegts_add_service(AVFormatContext * s,int sid,const AVDictionary * metadata,AVProgram * program)998 static MpegTSService *mpegts_add_service(AVFormatContext *s, int sid,
999 const AVDictionary *metadata,
1000 AVProgram *program)
1001 {
1002 MpegTSWrite *ts = s->priv_data;
1003 MpegTSService *service;
1004 AVDictionaryEntry *title, *provider;
1005 char default_service_name[32];
1006 const char *service_name;
1007 const char *provider_name;
1008
1009 title = av_dict_get(metadata, "service_name", NULL, 0);
1010 if (!title)
1011 title = av_dict_get(metadata, "title", NULL, 0);
1012 snprintf(default_service_name, sizeof(default_service_name), "%s%02d", DEFAULT_SERVICE_NAME, ts->nb_services + 1);
1013 service_name = title ? title->value : default_service_name;
1014 provider = av_dict_get(metadata, "service_provider", NULL, 0);
1015 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
1016
1017 service = av_mallocz(sizeof(MpegTSService));
1018 if (!service)
1019 return NULL;
1020 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
1021 service->sid = sid;
1022 service->pcr_pid = 0x1fff;
1023 if (encode_str8(service->provider_name, provider_name) < 0 ||
1024 encode_str8(service->name, service_name) < 0) {
1025 av_log(s, AV_LOG_ERROR, "Too long service or provider name\n");
1026 goto fail;
1027 }
1028 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
1029 goto fail;
1030
1031 service->pmt.write_packet = section_write_packet;
1032 service->pmt.opaque = s;
1033 service->pmt.cc = 15;
1034 service->pmt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1035 service->program = program;
1036
1037 return service;
1038 fail:
1039 av_free(service);
1040 return NULL;
1041 }
1042
enable_pcr_generation_for_stream(AVFormatContext * s,AVStream * pcr_st)1043 static void enable_pcr_generation_for_stream(AVFormatContext *s, AVStream *pcr_st)
1044 {
1045 MpegTSWrite *ts = s->priv_data;
1046 MpegTSWriteStream *ts_st = pcr_st->priv_data;
1047
1048 if (ts->mux_rate > 1 || ts->pcr_period_ms >= 0) {
1049 int pcr_period_ms = ts->pcr_period_ms == -1 ? PCR_RETRANS_TIME : ts->pcr_period_ms;
1050 ts_st->pcr_period = av_rescale(pcr_period_ms, PCR_TIME_BASE, 1000);
1051 } else {
1052 /* By default, for VBR we select the highest multiple of frame duration which is less than 100 ms. */
1053 int64_t frame_period = 0;
1054 if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1055 int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
1056 if (!frame_size) {
1057 av_log(s, AV_LOG_WARNING, "frame size not set\n");
1058 frame_size = 512;
1059 }
1060 frame_period = av_rescale_rnd(frame_size, PCR_TIME_BASE, pcr_st->codecpar->sample_rate, AV_ROUND_UP);
1061 } else if (pcr_st->avg_frame_rate.num) {
1062 frame_period = av_rescale_rnd(pcr_st->avg_frame_rate.den, PCR_TIME_BASE, pcr_st->avg_frame_rate.num, AV_ROUND_UP);
1063 }
1064 if (frame_period > 0 && frame_period <= PCR_TIME_BASE / 10)
1065 ts_st->pcr_period = frame_period * (PCR_TIME_BASE / 10 / frame_period);
1066 else
1067 ts_st->pcr_period = 1;
1068 }
1069
1070 // output a PCR as soon as possible
1071 ts_st->last_pcr = ts->first_pcr - ts_st->pcr_period;
1072 }
1073
select_pcr_streams(AVFormatContext * s)1074 static void select_pcr_streams(AVFormatContext *s)
1075 {
1076 MpegTSWrite *ts = s->priv_data;
1077
1078 for (int i = 0; i < ts->nb_services; i++) {
1079 MpegTSService *service = ts->services[i];
1080 AVStream *pcr_st = NULL;
1081 AVProgram *program = service->program;
1082 int nb_streams = program ? program->nb_stream_indexes : s->nb_streams;
1083
1084 for (int j = 0; j < nb_streams; j++) {
1085 AVStream *st = s->streams[program ? program->stream_index[j] : j];
1086 if (!pcr_st ||
1087 pcr_st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1088 {
1089 pcr_st = st;
1090 }
1091 }
1092
1093 if (pcr_st) {
1094 MpegTSWriteStream *ts_st = pcr_st->priv_data;
1095 service->pcr_pid = ts_st->pid;
1096 enable_pcr_generation_for_stream(s, pcr_st);
1097 av_log(s, AV_LOG_VERBOSE, "service %i using PCR in pid=%i, pcr_period=%"PRId64"ms\n",
1098 service->sid, service->pcr_pid, av_rescale(ts_st->pcr_period, 1000, PCR_TIME_BASE));
1099 }
1100 }
1101 }
1102
mpegts_init(AVFormatContext * s)1103 static int mpegts_init(AVFormatContext *s)
1104 {
1105 MpegTSWrite *ts = s->priv_data;
1106 AVDictionaryEntry *provider;
1107 const char *provider_name;
1108 int i, j;
1109 int ret;
1110
1111 if (ts->m2ts_mode == -1) {
1112 if (av_match_ext(s->url, "m2ts")) {
1113 ts->m2ts_mode = 1;
1114 } else {
1115 ts->m2ts_mode = 0;
1116 }
1117 }
1118
1119 ts->m2ts_video_pid = M2TS_VIDEO_PID;
1120 ts->m2ts_audio_pid = M2TS_AUDIO_START_PID;
1121 ts->m2ts_pgssub_pid = M2TS_PGSSUB_START_PID;
1122 ts->m2ts_textsub_pid = M2TS_TEXTSUB_PID;
1123
1124 if (ts->m2ts_mode) {
1125 ts->pmt_start_pid = M2TS_PMT_PID;
1126 if (s->nb_programs > 1) {
1127 av_log(s, AV_LOG_ERROR, "Only one program is allowed in m2ts mode!\n");
1128 return AVERROR(EINVAL);
1129 }
1130 }
1131
1132 if (s->max_delay < 0) /* Not set by the caller */
1133 s->max_delay = 0;
1134
1135 // round up to a whole number of TS packets
1136 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
1137
1138 if (!s->nb_programs) {
1139 /* allocate a single DVB service */
1140 if (!mpegts_add_service(s, ts->service_id, s->metadata, NULL))
1141 return AVERROR(ENOMEM);
1142 } else {
1143 for (i = 0; i < s->nb_programs; i++) {
1144 AVProgram *program = s->programs[i];
1145 if (!mpegts_add_service(s, program->id, program->metadata, program))
1146 return AVERROR(ENOMEM);
1147 }
1148 }
1149
1150 ts->pat.pid = PAT_PID;
1151 /* Initialize at 15 so that it wraps and is equal to 0 for the
1152 * first packet we write. */
1153 ts->pat.cc = 15;
1154 ts->pat.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1155 ts->pat.write_packet = section_write_packet;
1156 ts->pat.opaque = s;
1157
1158 ts->sdt.pid = SDT_PID;
1159 ts->sdt.cc = 15;
1160 ts->sdt.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1161 ts->sdt.write_packet = section_write_packet;
1162 ts->sdt.opaque = s;
1163
1164 ts->nit.pid = NIT_PID;
1165 ts->nit.cc = 15;
1166 ts->nit.discontinuity= ts->flags & MPEGTS_FLAG_DISCONT;
1167 ts->nit.write_packet = section_write_packet;
1168 ts->nit.opaque = s;
1169
1170 ts->pkt = ffformatcontext(s)->pkt;
1171
1172 /* assign pids to each stream */
1173 for (i = 0; i < s->nb_streams; i++) {
1174 AVStream *st = s->streams[i];
1175 MpegTSWriteStream *ts_st;
1176
1177 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
1178 if (!ts_st) {
1179 return AVERROR(ENOMEM);
1180 }
1181 st->priv_data = ts_st;
1182
1183 avpriv_set_pts_info(st, 33, 1, 90000);
1184
1185 ts_st->payload = av_mallocz(ts->pes_payload_size);
1186 if (!ts_st->payload) {
1187 return AVERROR(ENOMEM);
1188 }
1189
1190 /* MPEG pid values < 16 are reserved. Applications which set st->id in
1191 * this range are assigned a calculated pid. */
1192 if (st->id < 16) {
1193 if (ts->m2ts_mode) {
1194 switch (st->codecpar->codec_type) {
1195 case AVMEDIA_TYPE_VIDEO:
1196 ts_st->pid = ts->m2ts_video_pid++;
1197 break;
1198 case AVMEDIA_TYPE_AUDIO:
1199 ts_st->pid = ts->m2ts_audio_pid++;
1200 break;
1201 case AVMEDIA_TYPE_SUBTITLE:
1202 switch (st->codecpar->codec_id) {
1203 case AV_CODEC_ID_HDMV_PGS_SUBTITLE:
1204 ts_st->pid = ts->m2ts_pgssub_pid++;
1205 break;
1206 case AV_CODEC_ID_HDMV_TEXT_SUBTITLE:
1207 ts_st->pid = ts->m2ts_textsub_pid++;
1208 break;
1209 }
1210 break;
1211 }
1212 if (ts->m2ts_video_pid > M2TS_VIDEO_PID + 1 ||
1213 ts->m2ts_audio_pid > M2TS_AUDIO_START_PID + 32 ||
1214 ts->m2ts_pgssub_pid > M2TS_PGSSUB_START_PID + 32 ||
1215 ts->m2ts_textsub_pid > M2TS_TEXTSUB_PID + 1 ||
1216 ts_st->pid < 16) {
1217 av_log(s, AV_LOG_ERROR, "Cannot automatically assign PID for stream %d\n", st->index);
1218 return AVERROR(EINVAL);
1219 }
1220 } else {
1221 ts_st->pid = ts->start_pid + i;
1222 }
1223 } else {
1224 ts_st->pid = st->id;
1225 }
1226 if (ts_st->pid >= 0x1FFF) {
1227 av_log(s, AV_LOG_ERROR,
1228 "Invalid stream id %d, must be less than 8191\n", st->id);
1229 return AVERROR(EINVAL);
1230 }
1231 for (j = 0; j < ts->nb_services; j++) {
1232 if (ts->services[j]->pmt.pid > LAST_OTHER_PID) {
1233 av_log(s, AV_LOG_ERROR,
1234 "Invalid PMT PID %d, must be less than %d\n", ts->services[j]->pmt.pid, LAST_OTHER_PID + 1);
1235 return AVERROR(EINVAL);
1236 }
1237 if (ts_st->pid == ts->services[j]->pmt.pid) {
1238 av_log(s, AV_LOG_ERROR, "PID %d cannot be both elementary and PMT PID\n", ts_st->pid);
1239 return AVERROR(EINVAL);
1240 }
1241 }
1242 for (j = 0; j < i; j++) {
1243 MpegTSWriteStream *ts_st_prev = s->streams[j]->priv_data;
1244 if (ts_st_prev->pid == ts_st->pid) {
1245 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
1246 return AVERROR(EINVAL);
1247 }
1248 }
1249 ts_st->payload_pts = AV_NOPTS_VALUE;
1250 ts_st->payload_dts = AV_NOPTS_VALUE;
1251 ts_st->cc = 15;
1252 ts_st->discontinuity = ts->flags & MPEGTS_FLAG_DISCONT;
1253 if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
1254 st->codecpar->extradata_size > 0) {
1255 AVStream *ast;
1256 ts_st->amux = avformat_alloc_context();
1257 if (!ts_st->amux) {
1258 return AVERROR(ENOMEM);
1259 }
1260 ts_st->amux->oformat =
1261 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
1262 NULL, NULL);
1263 if (!ts_st->amux->oformat) {
1264 return AVERROR(EINVAL);
1265 }
1266 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
1267 return AVERROR(ENOMEM);
1268 }
1269 ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
1270 if (ret != 0)
1271 return ret;
1272 ast->time_base = st->time_base;
1273 ret = avformat_write_header(ts_st->amux, NULL);
1274 if (ret < 0)
1275 return ret;
1276 }
1277 if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
1278 ts_st->opus_pending_trim_start = st->codecpar->initial_padding * 48000 / st->codecpar->sample_rate;
1279 }
1280 }
1281
1282 if (ts->copyts < 1)
1283 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
1284
1285 select_pcr_streams(s);
1286
1287 ts->last_pat_ts = AV_NOPTS_VALUE;
1288 ts->last_sdt_ts = AV_NOPTS_VALUE;
1289 ts->last_nit_ts = AV_NOPTS_VALUE;
1290 ts->pat_period = av_rescale(ts->pat_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1291 ts->sdt_period = av_rescale(ts->sdt_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1292 ts->nit_period = av_rescale(ts->nit_period_us, PCR_TIME_BASE, AV_TIME_BASE);
1293
1294 /* assign provider name */
1295 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
1296 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
1297 if (encode_str8(ts->provider_name, provider_name) < 0) {
1298 av_log(s, AV_LOG_ERROR, "Too long provider name\n");
1299 return AVERROR(EINVAL);
1300 }
1301
1302 if (ts->mux_rate == 1)
1303 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
1304 else
1305 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
1306 av_log(s, AV_LOG_VERBOSE,
1307 "sdt every %"PRId64" ms, pat/pmt every %"PRId64" ms",
1308 av_rescale(ts->sdt_period, 1000, PCR_TIME_BASE),
1309 av_rescale(ts->pat_period, 1000, PCR_TIME_BASE));
1310 if (ts->flags & MPEGTS_FLAG_NIT)
1311 av_log(s, AV_LOG_VERBOSE, ", nit every %"PRId64" ms", av_rescale(ts->nit_period, 1000, PCR_TIME_BASE));
1312 av_log(s, AV_LOG_VERBOSE, "\n");
1313
1314 return 0;
1315 }
1316
1317 /* send SDT, NIT, PAT and PMT tables regularly */
retransmit_si_info(AVFormatContext * s,int force_pat,int force_sdt,int force_nit,int64_t pcr)1318 static void retransmit_si_info(AVFormatContext *s, int force_pat, int force_sdt, int force_nit, int64_t pcr)
1319 {
1320 MpegTSWrite *ts = s->priv_data;
1321 int i;
1322
1323 if ((pcr != AV_NOPTS_VALUE && ts->last_sdt_ts == AV_NOPTS_VALUE) ||
1324 (pcr != AV_NOPTS_VALUE && pcr - ts->last_sdt_ts >= ts->sdt_period) ||
1325 force_sdt
1326 ) {
1327 if (pcr != AV_NOPTS_VALUE)
1328 ts->last_sdt_ts = FFMAX(pcr, ts->last_sdt_ts);
1329 mpegts_write_sdt(s);
1330 }
1331 if ((pcr != AV_NOPTS_VALUE && ts->last_pat_ts == AV_NOPTS_VALUE) ||
1332 (pcr != AV_NOPTS_VALUE && pcr - ts->last_pat_ts >= ts->pat_period) ||
1333 force_pat) {
1334 if (pcr != AV_NOPTS_VALUE)
1335 ts->last_pat_ts = FFMAX(pcr, ts->last_pat_ts);
1336 mpegts_write_pat(s);
1337 for (i = 0; i < ts->nb_services; i++)
1338 mpegts_write_pmt(s, ts->services[i]);
1339 }
1340 if ((pcr != AV_NOPTS_VALUE && ts->last_nit_ts == AV_NOPTS_VALUE) ||
1341 (pcr != AV_NOPTS_VALUE && pcr - ts->last_nit_ts >= ts->nit_period) ||
1342 force_nit
1343 ) {
1344 if (pcr != AV_NOPTS_VALUE)
1345 ts->last_nit_ts = FFMAX(pcr, ts->last_nit_ts);
1346 if (ts->flags & MPEGTS_FLAG_NIT)
1347 mpegts_write_nit(s);
1348 }
1349 }
1350
write_pcr_bits(uint8_t * buf,int64_t pcr)1351 static int write_pcr_bits(uint8_t *buf, int64_t pcr)
1352 {
1353 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
1354
1355 *buf++ = pcr_high >> 25;
1356 *buf++ = pcr_high >> 17;
1357 *buf++ = pcr_high >> 9;
1358 *buf++ = pcr_high >> 1;
1359 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
1360 *buf++ = pcr_low;
1361
1362 return 6;
1363 }
1364
1365 /* Write a single null transport stream packet */
mpegts_insert_null_packet(AVFormatContext * s)1366 static void mpegts_insert_null_packet(AVFormatContext *s)
1367 {
1368 uint8_t *q;
1369 uint8_t buf[TS_PACKET_SIZE];
1370
1371 q = buf;
1372 *q++ = 0x47;
1373 *q++ = 0x00 | 0x1f;
1374 *q++ = 0xff;
1375 *q++ = 0x10;
1376 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
1377 write_packet(s, buf);
1378 }
1379
1380 /* Write a single transport stream packet with a PCR and no payload */
mpegts_insert_pcr_only(AVFormatContext * s,AVStream * st)1381 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
1382 {
1383 MpegTSWrite *ts = s->priv_data;
1384 MpegTSWriteStream *ts_st = st->priv_data;
1385 uint8_t *q;
1386 uint8_t buf[TS_PACKET_SIZE];
1387
1388 q = buf;
1389 *q++ = 0x47;
1390 *q++ = ts_st->pid >> 8;
1391 *q++ = ts_st->pid;
1392 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
1393 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
1394 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
1395 *q++ = 0x10; /* Adaptation flags: PCR present */
1396 if (ts_st->discontinuity) {
1397 q[-1] |= 0x80;
1398 ts_st->discontinuity = 0;
1399 }
1400
1401 /* PCR coded into 6 bytes */
1402 q += write_pcr_bits(q, get_pcr(ts));
1403
1404 /* stuffing bytes */
1405 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
1406 write_packet(s, buf);
1407 }
1408
write_pts(uint8_t * q,int fourbits,int64_t pts)1409 static void write_pts(uint8_t *q, int fourbits, int64_t pts)
1410 {
1411 int val;
1412
1413 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
1414 *q++ = val;
1415 val = (((pts >> 15) & 0x7fff) << 1) | 1;
1416 *q++ = val >> 8;
1417 *q++ = val;
1418 val = (((pts) & 0x7fff) << 1) | 1;
1419 *q++ = val >> 8;
1420 *q++ = val;
1421 }
1422
1423 /* Set an adaptation field flag in an MPEG-TS packet*/
set_af_flag(uint8_t * pkt,int flag)1424 static void set_af_flag(uint8_t *pkt, int flag)
1425 {
1426 // expect at least one flag to set
1427 av_assert0(flag);
1428
1429 if ((pkt[3] & 0x20) == 0) {
1430 // no AF yet, set adaptation field flag
1431 pkt[3] |= 0x20;
1432 // 1 byte length, no flags
1433 pkt[4] = 1;
1434 pkt[5] = 0;
1435 }
1436 pkt[5] |= flag;
1437 }
1438
1439 /* Extend the adaptation field by size bytes */
extend_af(uint8_t * pkt,int size)1440 static void extend_af(uint8_t *pkt, int size)
1441 {
1442 // expect already existing adaptation field
1443 av_assert0(pkt[3] & 0x20);
1444 pkt[4] += size;
1445 }
1446
1447 /* Get a pointer to MPEG-TS payload (right after TS packet header) */
get_ts_payload_start(uint8_t * pkt)1448 static uint8_t *get_ts_payload_start(uint8_t *pkt)
1449 {
1450 if (pkt[3] & 0x20)
1451 return pkt + 5 + pkt[4];
1452 else
1453 return pkt + 4;
1454 }
1455
get_pes_stream_id(AVFormatContext * s,AVStream * st,int stream_id,int * async)1456 static int get_pes_stream_id(AVFormatContext *s, AVStream *st, int stream_id, int *async)
1457 {
1458 MpegTSWrite *ts = s->priv_data;
1459 *async = 0;
1460 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1461 if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
1462 return STREAM_ID_EXTENDED_STREAM_ID;
1463 else
1464 return STREAM_ID_VIDEO_STREAM_0;
1465 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1466 (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
1467 st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
1468 st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
1469 return STREAM_ID_AUDIO_STREAM_0;
1470 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1471 st->codecpar->codec_id == AV_CODEC_ID_AC3 &&
1472 ts->m2ts_mode) {
1473 return STREAM_ID_EXTENDED_STREAM_ID;
1474 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA &&
1475 st->codecpar->codec_id == AV_CODEC_ID_TIMED_ID3) {
1476 return STREAM_ID_PRIVATE_STREAM_1;
1477 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
1478 if (stream_id == STREAM_ID_PRIVATE_STREAM_1) /* asynchronous KLV */
1479 *async = 1;
1480 return stream_id != -1 ? stream_id : STREAM_ID_METADATA_STREAM;
1481 } else {
1482 return STREAM_ID_PRIVATE_STREAM_1;
1483 }
1484 }
1485
1486 /* Add a PES header to the front of the payload, and segment into an integer
1487 * number of TS packets. The final TS packet is padded using an oversized
1488 * adaptation header to exactly fill the last TS packet.
1489 * 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)1490 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
1491 const uint8_t *payload, int payload_size,
1492 int64_t pts, int64_t dts, int key, int stream_id)
1493 {
1494 MpegTSWriteStream *ts_st = st->priv_data;
1495 MpegTSWrite *ts = s->priv_data;
1496 uint8_t buf[TS_PACKET_SIZE];
1497 uint8_t *q;
1498 int val, is_start, len, header_len, write_pcr, flags;
1499 int afc_len, stuffing_len;
1500 int is_dvb_subtitle = (st->codecpar->codec_id == AV_CODEC_ID_DVB_SUBTITLE);
1501 int is_dvb_teletext = (st->codecpar->codec_id == AV_CODEC_ID_DVB_TELETEXT);
1502 int is_audio_pcm = (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE);
1503 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
1504 int force_pat = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
1505 int force_sdt = 0;
1506 int force_nit = 0;
1507
1508 av_assert0(ts_st->payload != buf || st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO);
1509 if (ts->flags & MPEGTS_FLAG_PAT_PMT_AT_FRAMES && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1510 force_pat = 1;
1511 }
1512
1513 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1514 force_pat = 1;
1515 force_sdt = 1;
1516 force_nit = 1;
1517 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1518 }
1519
1520 is_start = 1;
1521 while (payload_size > 0) {
1522 int64_t pcr = AV_NOPTS_VALUE;
1523 if (ts->mux_rate > 1)
1524 pcr = get_pcr(ts);
1525 else if (dts != AV_NOPTS_VALUE)
1526 pcr = (dts - delay) * 300;
1527
1528 retransmit_si_info(s, force_pat, force_sdt, force_nit, pcr);
1529 force_pat = 0;
1530 force_sdt = 0;
1531 force_nit = 0;
1532
1533 write_pcr = 0;
1534 if (ts->mux_rate > 1) {
1535 /* Send PCR packets for all PCR streams if needed */
1536 pcr = get_pcr(ts);
1537 if (pcr >= ts->next_pcr) {
1538 int64_t next_pcr = INT64_MAX;
1539 for (int i = 0; i < s->nb_streams; i++) {
1540 /* Make the current stream the last, because for that we
1541 * can insert the pcr into the payload later */
1542 int st2_index = i < st->index ? i : (i + 1 == s->nb_streams ? st->index : i + 1);
1543 AVStream *st2 = s->streams[st2_index];
1544 MpegTSWriteStream *ts_st2 = st2->priv_data;
1545 if (ts_st2->pcr_period) {
1546 if (pcr - ts_st2->last_pcr >= ts_st2->pcr_period) {
1547 ts_st2->last_pcr = FFMAX(pcr - ts_st2->pcr_period, ts_st2->last_pcr + ts_st2->pcr_period);
1548 if (st2 != st) {
1549 mpegts_insert_pcr_only(s, st2);
1550 pcr = get_pcr(ts);
1551 } else {
1552 write_pcr = 1;
1553 }
1554 }
1555 next_pcr = FFMIN(next_pcr, ts_st2->last_pcr + ts_st2->pcr_period);
1556 }
1557 }
1558 ts->next_pcr = next_pcr;
1559 }
1560 if (dts != AV_NOPTS_VALUE && (dts - pcr / 300) > delay) {
1561 /* pcr insert gets priority over null packet insert */
1562 if (write_pcr)
1563 mpegts_insert_pcr_only(s, st);
1564 else
1565 mpegts_insert_null_packet(s);
1566 /* recalculate write_pcr and possibly retransmit si_info */
1567 continue;
1568 }
1569 } else if (ts_st->pcr_period && pcr != AV_NOPTS_VALUE) {
1570 if (pcr - ts_st->last_pcr >= ts_st->pcr_period && is_start) {
1571 ts_st->last_pcr = FFMAX(pcr - ts_st->pcr_period, ts_st->last_pcr + ts_st->pcr_period);
1572 write_pcr = 1;
1573 }
1574 }
1575
1576 /* prepare packet header */
1577 q = buf;
1578 *q++ = 0x47;
1579 val = ts_st->pid >> 8;
1580 if (ts->m2ts_mode && st->codecpar->codec_id == AV_CODEC_ID_AC3)
1581 val |= 0x20;
1582 if (is_start)
1583 val |= 0x40;
1584 *q++ = val;
1585 *q++ = ts_st->pid;
1586 ts_st->cc = ts_st->cc + 1 & 0xf;
1587 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
1588 if (ts_st->discontinuity) {
1589 set_af_flag(buf, 0x80);
1590 q = get_ts_payload_start(buf);
1591 ts_st->discontinuity = 0;
1592 }
1593 if (key && is_start && pts != AV_NOPTS_VALUE &&
1594 !is_dvb_teletext /* adaptation+payload forbidden for teletext (ETSI EN 300 472 V1.3.1 4.1) */) {
1595 // set Random Access for key frames
1596 if (ts_st->pcr_period)
1597 write_pcr = 1;
1598 set_af_flag(buf, 0x40);
1599 q = get_ts_payload_start(buf);
1600 }
1601 if (write_pcr) {
1602 set_af_flag(buf, 0x10);
1603 q = get_ts_payload_start(buf);
1604 // add 11, pcr references the last byte of program clock reference base
1605 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1606 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1607 extend_af(buf, write_pcr_bits(q, pcr));
1608 q = get_ts_payload_start(buf);
1609 }
1610 if (is_start) {
1611 int pes_extension = 0;
1612 int pes_header_stuffing_bytes = 0;
1613 int async;
1614 /* write PES header */
1615 *q++ = 0x00;
1616 *q++ = 0x00;
1617 *q++ = 0x01;
1618 *q++ = stream_id = get_pes_stream_id(s, st, stream_id, &async);
1619 if (async)
1620 pts = dts = AV_NOPTS_VALUE;
1621
1622 header_len = 0;
1623
1624 if (stream_id != STREAM_ID_PROGRAM_STREAM_MAP &&
1625 stream_id != STREAM_ID_PADDING_STREAM &&
1626 stream_id != STREAM_ID_PRIVATE_STREAM_2 &&
1627 stream_id != STREAM_ID_ECM_STREAM &&
1628 stream_id != STREAM_ID_EMM_STREAM &&
1629 stream_id != STREAM_ID_PROGRAM_STREAM_DIRECTORY &&
1630 stream_id != STREAM_ID_DSMCC_STREAM &&
1631 stream_id != STREAM_ID_TYPE_E_STREAM) {
1632
1633 flags = 0;
1634 if (pts != AV_NOPTS_VALUE) {
1635 header_len += 5;
1636 flags |= 0x80;
1637 }
1638 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1639 header_len += 5;
1640 flags |= 0x40;
1641 }
1642 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
1643 st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1644 /* set PES_extension_flag */
1645 pes_extension = 1;
1646 flags |= 0x01;
1647
1648 /* One byte for PES2 extension flag +
1649 * one byte for extension length +
1650 * one byte for extension id */
1651 header_len += 3;
1652 }
1653 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1654 * otherwise it will not play sound on blu-ray
1655 */
1656 if (ts->m2ts_mode &&
1657 st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
1658 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1659 /* set PES_extension_flag */
1660 pes_extension = 1;
1661 flags |= 0x01;
1662 header_len += 3;
1663 }
1664 if (is_dvb_teletext) {
1665 pes_header_stuffing_bytes = 0x24 - header_len;
1666 header_len = 0x24;
1667 }
1668 else if(is_audio_pcm){
1669 pes_header_stuffing_bytes = 2;
1670 header_len += 2;
1671 }
1672 len = payload_size + header_len + 3;
1673 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1674 if (is_dvb_subtitle) {
1675 len += 3;
1676 payload_size++;
1677 }
1678 if (len > 0xffff)
1679 len = 0;
1680 if (ts->omit_video_pes_length && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
1681 len = 0;
1682 }
1683 *q++ = len >> 8;
1684 *q++ = len;
1685 val = 0x80;
1686 /* data alignment indicator is required for subtitle and data streams */
1687 if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1688 val |= 0x04;
1689 *q++ = val;
1690 *q++ = flags;
1691 *q++ = header_len;
1692 if (pts != AV_NOPTS_VALUE) {
1693 write_pts(q, flags >> 6, pts);
1694 q += 5;
1695 }
1696 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1697 write_pts(q, 1, dts);
1698 q += 5;
1699 }
1700 if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
1701 flags = 0x01; /* set PES_extension_flag_2 */
1702 *q++ = flags;
1703 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1704 /* Set the stream ID extension flag bit to 0 and
1705 * write the extended stream ID. */
1706 *q++ = 0x00 | 0x60;
1707 }
1708 /* For Blu-ray AC3 Audio Setting extended flags */
1709 if (ts->m2ts_mode &&
1710 pes_extension &&
1711 st->codecpar->codec_id == AV_CODEC_ID_AC3) {
1712 flags = 0x01; /* set PES_extension_flag_2 */
1713 *q++ = flags;
1714 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1715 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1716 }
1717
1718
1719 if (is_dvb_subtitle) {
1720 /* First two fields of DVB subtitles PES data:
1721 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1722 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1723 *q++ = 0x20;
1724 *q++ = 0x00;
1725 }
1726 if (is_dvb_teletext || is_audio_pcm) {
1727 memset(q, 0xff, pes_header_stuffing_bytes);
1728 q += pes_header_stuffing_bytes;
1729 }
1730 } else {
1731 len = payload_size;
1732 *q++ = len >> 8;
1733 *q++ = len;
1734 }
1735 is_start = 0;
1736 }
1737 /* header size */
1738 header_len = q - buf;
1739 /* data len */
1740 len = TS_PACKET_SIZE - header_len;
1741 if (len > payload_size)
1742 len = payload_size;
1743 stuffing_len = TS_PACKET_SIZE - header_len - len;
1744 if (stuffing_len > 0) {
1745 /* add stuffing with AFC */
1746 if (buf[3] & 0x20) {
1747 /* stuffing already present: increase its size */
1748 afc_len = buf[4] + 1;
1749 memmove(buf + 4 + afc_len + stuffing_len,
1750 buf + 4 + afc_len,
1751 header_len - (4 + afc_len));
1752 buf[4] += stuffing_len;
1753 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1754 } else {
1755 /* add stuffing */
1756 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1757 buf[3] |= 0x20;
1758 buf[4] = stuffing_len - 1;
1759 if (stuffing_len >= 2) {
1760 buf[5] = 0x00;
1761 memset(buf + 6, 0xff, stuffing_len - 2);
1762 }
1763 }
1764 }
1765
1766 if (is_dvb_subtitle && payload_size == len) {
1767 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1768 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1769 } else {
1770 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1771 }
1772
1773 payload += len;
1774 payload_size -= len;
1775 write_packet(s, buf);
1776 }
1777 ts_st->prev_payload_key = key;
1778 }
1779
ff_check_h264_startcode(AVFormatContext * s,const AVStream * st,const AVPacket * pkt)1780 int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1781 {
1782 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1783 if (!st->nb_frames) {
1784 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1785 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1786 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1787 return AVERROR_INVALIDDATA;
1788 }
1789 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1790 if (pkt->size)
1791 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1792 av_log(s, AV_LOG_WARNING, "\n");
1793 }
1794 return 0;
1795 }
1796
check_hevc_startcode(AVFormatContext * s,const AVStream * st,const AVPacket * pkt)1797 static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1798 {
1799 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001 && AV_RB24(pkt->data) != 0x000001) {
1800 if (!st->nb_frames) {
1801 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1802 return AVERROR_PATCHWELCOME;
1803 }
1804 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1805 if (pkt->size)
1806 av_log(s, AV_LOG_WARNING, " data %08"PRIX32, AV_RB32(pkt->data));
1807 av_log(s, AV_LOG_WARNING, "\n");
1808 }
1809 return 0;
1810 }
1811
1812 /* Based on GStreamer's gst-plugins-base/ext/ogg/gstoggstream.c
1813 * Released under the LGPL v2.1+, written by
1814 * Vincent Penquerc'h <vincent.penquerch@collabora.co.uk>
1815 */
opus_get_packet_samples(AVFormatContext * s,AVPacket * pkt)1816 static int opus_get_packet_samples(AVFormatContext *s, AVPacket *pkt)
1817 {
1818 static const int durations[32] = {
1819 480, 960, 1920, 2880, /* Silk NB */
1820 480, 960, 1920, 2880, /* Silk MB */
1821 480, 960, 1920, 2880, /* Silk WB */
1822 480, 960, /* Hybrid SWB */
1823 480, 960, /* Hybrid FB */
1824 120, 240, 480, 960, /* CELT NB */
1825 120, 240, 480, 960, /* CELT NB */
1826 120, 240, 480, 960, /* CELT NB */
1827 120, 240, 480, 960, /* CELT NB */
1828 };
1829 int toc, frame_duration, nframes, duration;
1830
1831 if (pkt->size < 1)
1832 return 0;
1833
1834 toc = pkt->data[0];
1835
1836 frame_duration = durations[toc >> 3];
1837 switch (toc & 3) {
1838 case 0:
1839 nframes = 1;
1840 break;
1841 case 1:
1842 nframes = 2;
1843 break;
1844 case 2:
1845 nframes = 2;
1846 break;
1847 case 3:
1848 if (pkt->size < 2)
1849 return 0;
1850 nframes = pkt->data[1] & 63;
1851 break;
1852 }
1853
1854 duration = nframes * frame_duration;
1855 if (duration > 5760) {
1856 av_log(s, AV_LOG_WARNING,
1857 "Opus packet duration > 120 ms, invalid");
1858 return 0;
1859 }
1860
1861 return duration;
1862 }
1863
mpegts_write_packet_internal(AVFormatContext * s,AVPacket * pkt)1864 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1865 {
1866 AVStream *st = s->streams[pkt->stream_index];
1867 int size = pkt->size;
1868 const uint8_t *buf = pkt->data;
1869 uint8_t *data = NULL;
1870 MpegTSWrite *ts = s->priv_data;
1871 MpegTSWriteStream *ts_st = st->priv_data;
1872 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1873 const int64_t max_audio_delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) / 2;
1874 int64_t dts = pkt->dts, pts = pkt->pts;
1875 int opus_samples = 0;
1876 size_t side_data_size;
1877 uint8_t *side_data = NULL;
1878 int stream_id = -1;
1879
1880 side_data = av_packet_get_side_data(pkt,
1881 AV_PKT_DATA_MPEGTS_STREAM_ID,
1882 &side_data_size);
1883 if (side_data)
1884 stream_id = side_data[0];
1885
1886 if (!ts->first_dts_checked && dts != AV_NOPTS_VALUE) {
1887 ts->first_pcr += dts * 300;
1888 ts->first_dts_checked = 1;
1889 }
1890
1891 if (ts->copyts < 1) {
1892 if (pts != AV_NOPTS_VALUE)
1893 pts += delay;
1894 if (dts != AV_NOPTS_VALUE)
1895 dts += delay;
1896 }
1897
1898 if (!ts_st->first_timestamp_checked && (pts == AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE)) {
1899 av_log(s, AV_LOG_ERROR, "first pts and dts value must be set\n");
1900 return AVERROR_INVALIDDATA;
1901 }
1902 ts_st->first_timestamp_checked = 1;
1903
1904 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
1905 const uint8_t *p = buf, *buf_end = p + size;
1906 uint32_t state = -1;
1907 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1908 int ret = ff_check_h264_startcode(s, st, pkt);
1909 if (ret < 0)
1910 return ret;
1911
1912 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1913 extradd = 0;
1914
1915 do {
1916 p = avpriv_find_start_code(p, buf_end, &state);
1917 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", state & 0x1f);
1918 if ((state & 0x1f) == 7)
1919 extradd = 0;
1920 } while (p < buf_end && (state & 0x1f) != 9 &&
1921 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1922
1923 if ((state & 0x1f) != 5)
1924 extradd = 0;
1925 if ((state & 0x1f) != 9) { // AUD NAL
1926 data = av_malloc(pkt->size + 6 + extradd);
1927 if (!data)
1928 return AVERROR(ENOMEM);
1929 memcpy(data + 6, st->codecpar->extradata, extradd);
1930 memcpy(data + 6 + extradd, pkt->data, pkt->size);
1931 AV_WB32(data, 0x00000001);
1932 data[4] = 0x09;
1933 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1934 buf = data;
1935 size = pkt->size + 6 + extradd;
1936 }
1937 } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
1938 if (pkt->size < 2) {
1939 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1940 return AVERROR_INVALIDDATA;
1941 }
1942 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1943 int ret;
1944 AVPacket *pkt2 = ts->pkt;
1945
1946 if (!ts_st->amux) {
1947 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1948 "and extradata missing\n");
1949 } else {
1950 av_packet_unref(pkt2);
1951 pkt2->data = pkt->data;
1952 pkt2->size = pkt->size;
1953 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1954 pkt2->dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1955
1956 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1957 if (ret < 0)
1958 return ret;
1959
1960 ret = av_write_frame(ts_st->amux, pkt2);
1961 if (ret < 0) {
1962 ffio_free_dyn_buf(&ts_st->amux->pb);
1963 return ret;
1964 }
1965 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1966 ts_st->amux->pb = NULL;
1967 buf = data;
1968 }
1969 }
1970 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
1971 const uint8_t *p = buf, *buf_end = p + size;
1972 uint32_t state = -1;
1973 int extradd = (pkt->flags & AV_PKT_FLAG_KEY) ? st->codecpar->extradata_size : 0;
1974 int ret = check_hevc_startcode(s, st, pkt);
1975 if (ret < 0)
1976 return ret;
1977
1978 if (extradd && AV_RB24(st->codecpar->extradata) > 1)
1979 extradd = 0;
1980
1981 do {
1982 p = avpriv_find_start_code(p, buf_end, &state);
1983 av_log(s, AV_LOG_TRACE, "nal %"PRId32"\n", (state & 0x7e)>>1);
1984 if ((state & 0x7e) == 2*32)
1985 extradd = 0;
1986 } while (p < buf_end && (state & 0x7e) != 2*35 &&
1987 (state & 0x7e) >= 2*32);
1988
1989 if ((state & 0x7e) < 2*16 || (state & 0x7e) >= 2*24)
1990 extradd = 0;
1991 if ((state & 0x7e) != 2*35) { // AUD NAL
1992 data = av_malloc(pkt->size + 7 + extradd);
1993 if (!data)
1994 return AVERROR(ENOMEM);
1995 memcpy(data + 7, st->codecpar->extradata, extradd);
1996 memcpy(data + 7 + extradd, pkt->data, pkt->size);
1997 AV_WB32(data, 0x00000001);
1998 data[4] = 2*35;
1999 data[5] = 1;
2000 data[6] = 0x50; // any slice type (0x4) + rbsp stop one bit
2001 buf = data;
2002 size = pkt->size + 7 + extradd;
2003 }
2004 } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) {
2005 if (pkt->size < 2) {
2006 av_log(s, AV_LOG_ERROR, "Opus packet too short\n");
2007 return AVERROR_INVALIDDATA;
2008 }
2009
2010 /* Add Opus control header */
2011 if ((AV_RB16(pkt->data) >> 5) != 0x3ff) {
2012 uint8_t *side_data;
2013 size_t side_data_size;
2014 int i, n;
2015 int ctrl_header_size;
2016 int trim_start = 0, trim_end = 0;
2017
2018 opus_samples = opus_get_packet_samples(s, pkt);
2019
2020 side_data = av_packet_get_side_data(pkt,
2021 AV_PKT_DATA_SKIP_SAMPLES,
2022 &side_data_size);
2023
2024 if (side_data && side_data_size >= 10) {
2025 trim_end = AV_RL32(side_data + 4) * 48000 / st->codecpar->sample_rate;
2026 }
2027
2028 ctrl_header_size = pkt->size + 2 + pkt->size / 255 + 1;
2029 if (ts_st->opus_pending_trim_start)
2030 ctrl_header_size += 2;
2031 if (trim_end)
2032 ctrl_header_size += 2;
2033
2034 data = av_malloc(ctrl_header_size);
2035 if (!data)
2036 return AVERROR(ENOMEM);
2037
2038 data[0] = 0x7f;
2039 data[1] = 0xe0;
2040 if (ts_st->opus_pending_trim_start)
2041 data[1] |= 0x10;
2042 if (trim_end)
2043 data[1] |= 0x08;
2044
2045 n = pkt->size;
2046 i = 2;
2047 do {
2048 data[i] = FFMIN(n, 255);
2049 n -= 255;
2050 i++;
2051 } while (n >= 0);
2052
2053 av_assert0(2 + pkt->size / 255 + 1 == i);
2054
2055 if (ts_st->opus_pending_trim_start) {
2056 trim_start = FFMIN(ts_st->opus_pending_trim_start, opus_samples);
2057 AV_WB16(data + i, trim_start);
2058 i += 2;
2059 ts_st->opus_pending_trim_start -= trim_start;
2060 }
2061 if (trim_end) {
2062 trim_end = FFMIN(trim_end, opus_samples - trim_start);
2063 AV_WB16(data + i, trim_end);
2064 i += 2;
2065 }
2066
2067 memcpy(data + i, pkt->data, pkt->size);
2068 buf = data;
2069 size = ctrl_header_size;
2070 } else {
2071 /* TODO: Can we get TS formatted data here? If so we will
2072 * need to count the samples of that too! */
2073 av_log(s, AV_LOG_WARNING, "Got MPEG-TS formatted Opus data, unhandled");
2074 }
2075 } else if (st->codecpar->codec_id == AV_CODEC_ID_AC3 && !ts_st->dvb_ac3_desc) {
2076 AC3HeaderInfo *hdr = NULL;
2077
2078 if (avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) >= 0) {
2079 uint8_t number_of_channels_flag;
2080 uint8_t service_type_flag;
2081 uint8_t full_service_flag = 1;
2082 DVBAC3Descriptor *dvb_ac3_desc;
2083
2084 dvb_ac3_desc = av_mallocz(sizeof(*dvb_ac3_desc));
2085 if (!dvb_ac3_desc) {
2086 av_free(hdr);
2087 return AVERROR(ENOMEM);
2088 }
2089
2090 service_type_flag = hdr->bitstream_mode;
2091 switch (hdr->channel_mode) {
2092 case AC3_CHMODE_DUALMONO:
2093 number_of_channels_flag = 1;
2094 break;
2095 case AC3_CHMODE_MONO:
2096 number_of_channels_flag = 0;
2097 break;
2098 case AC3_CHMODE_STEREO:
2099 if (hdr->dolby_surround_mode == AC3_DSURMOD_ON)
2100 number_of_channels_flag = 3;
2101 else
2102 number_of_channels_flag = 2;
2103 break;
2104 case AC3_CHMODE_3F:
2105 case AC3_CHMODE_2F1R:
2106 case AC3_CHMODE_3F1R:
2107 case AC3_CHMODE_2F2R:
2108 case AC3_CHMODE_3F2R:
2109 number_of_channels_flag = 4;
2110 break;
2111 default: /* reserved */
2112 number_of_channels_flag = 7;
2113 break;
2114 }
2115
2116 if (service_type_flag == 1 || service_type_flag == 4 ||
2117 (service_type_flag == 7 && !number_of_channels_flag))
2118 full_service_flag = 0;
2119
2120 dvb_ac3_desc->component_type_flag = 1;
2121 dvb_ac3_desc->component_type = (full_service_flag << 6) |
2122 ((service_type_flag & 0x7) << 3) |
2123 (number_of_channels_flag & 0x7);
2124 dvb_ac3_desc->bsid_flag = 1;
2125 dvb_ac3_desc->bsid = hdr->bitstream_id;
2126 dvb_ac3_desc->mainid_flag = 0;
2127 dvb_ac3_desc->asvc_flag = 0;
2128
2129 ts_st->dvb_ac3_desc = dvb_ac3_desc;
2130 }
2131 av_free(hdr);
2132 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_BLURAY && ts->m2ts_mode) {
2133 mpegts_write_pes(s, st, buf, size, pts, dts,
2134 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
2135 return 0;
2136 }
2137
2138 if (ts_st->payload_size && (ts_st->payload_size + size > ts->pes_payload_size ||
2139 (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
2140 dts - ts_st->payload_dts >= max_audio_delay) ||
2141 ts_st->opus_queued_samples + opus_samples >= 5760 /* 120ms */)) {
2142 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
2143 ts_st->payload_pts, ts_st->payload_dts,
2144 ts_st->payload_flags & AV_PKT_FLAG_KEY, stream_id);
2145 ts_st->payload_size = 0;
2146 ts_st->opus_queued_samples = 0;
2147 }
2148
2149 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
2150 av_assert0(!ts_st->payload_size);
2151 // for video and subtitle, write a single pes packet
2152 mpegts_write_pes(s, st, buf, size, pts, dts,
2153 pkt->flags & AV_PKT_FLAG_KEY, stream_id);
2154 ts_st->opus_queued_samples = 0;
2155 av_free(data);
2156 return 0;
2157 }
2158
2159 if (!ts_st->payload_size) {
2160 ts_st->payload_pts = pts;
2161 ts_st->payload_dts = dts;
2162 ts_st->payload_flags = pkt->flags;
2163 }
2164
2165 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
2166 ts_st->payload_size += size;
2167 ts_st->opus_queued_samples += opus_samples;
2168
2169 av_free(data);
2170
2171 return 0;
2172 }
2173
mpegts_write_flush(AVFormatContext * s)2174 static void mpegts_write_flush(AVFormatContext *s)
2175 {
2176 MpegTSWrite *ts = s->priv_data;
2177 int i;
2178
2179 /* flush current packets */
2180 for (i = 0; i < s->nb_streams; i++) {
2181 AVStream *st = s->streams[i];
2182 MpegTSWriteStream *ts_st = st->priv_data;
2183 if (ts_st->payload_size > 0) {
2184 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
2185 ts_st->payload_pts, ts_st->payload_dts,
2186 ts_st->payload_flags & AV_PKT_FLAG_KEY, -1);
2187 ts_st->payload_size = 0;
2188 ts_st->opus_queued_samples = 0;
2189 }
2190 }
2191
2192 if (ts->m2ts_mode) {
2193 int packets = (avio_tell(s->pb) / (TS_PACKET_SIZE + 4)) % 32;
2194 while (packets++ < 32)
2195 mpegts_insert_null_packet(s);
2196 }
2197 }
2198
mpegts_write_packet(AVFormatContext * s,AVPacket * pkt)2199 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
2200 {
2201 if (!pkt) {
2202 mpegts_write_flush(s);
2203 return 1;
2204 } else {
2205 return mpegts_write_packet_internal(s, pkt);
2206 }
2207 }
2208
mpegts_write_end(AVFormatContext * s)2209 static int mpegts_write_end(AVFormatContext *s)
2210 {
2211 if (s->pb)
2212 mpegts_write_flush(s);
2213
2214 return 0;
2215 }
2216
mpegts_deinit(AVFormatContext * s)2217 static void mpegts_deinit(AVFormatContext *s)
2218 {
2219 MpegTSWrite *ts = s->priv_data;
2220 MpegTSService *service;
2221 int i;
2222
2223 for (i = 0; i < s->nb_streams; i++) {
2224 AVStream *st = s->streams[i];
2225 MpegTSWriteStream *ts_st = st->priv_data;
2226 if (ts_st) {
2227 av_freep(&ts_st->dvb_ac3_desc);
2228 av_freep(&ts_st->payload);
2229 if (ts_st->amux) {
2230 avformat_free_context(ts_st->amux);
2231 ts_st->amux = NULL;
2232 }
2233 }
2234 }
2235
2236 for (i = 0; i < ts->nb_services; i++) {
2237 service = ts->services[i];
2238 av_freep(&service);
2239 }
2240 av_freep(&ts->services);
2241 }
2242
mpegts_check_bitstream(AVFormatContext * s,AVStream * st,const AVPacket * pkt)2243 static int mpegts_check_bitstream(AVFormatContext *s, AVStream *st,
2244 const AVPacket *pkt)
2245 {
2246 int ret = 1;
2247
2248 if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2249 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
2250 (AV_RB24(pkt->data) != 0x000001 ||
2251 (st->codecpar->extradata_size > 0 &&
2252 st->codecpar->extradata[0] == 1)))
2253 ret = ff_stream_add_bitstream_filter(st, "h264_mp4toannexb", NULL);
2254 } else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
2255 if (pkt->size >= 5 && AV_RB32(pkt->data) != 0x0000001 &&
2256 (AV_RB24(pkt->data) != 0x000001 ||
2257 (st->codecpar->extradata_size > 0 &&
2258 st->codecpar->extradata[0] == 1)))
2259 ret = ff_stream_add_bitstream_filter(st, "hevc_mp4toannexb", NULL);
2260 }
2261
2262 return ret;
2263 }
2264
2265 #define OFFSET(x) offsetof(MpegTSWrite, x)
2266 #define ENC AV_OPT_FLAG_ENCODING_PARAM
2267 static const AVOption options[] = {
2268 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
2269 OFFSET(transport_stream_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
2270 { "mpegts_original_network_id", "Set original_network_id field.",
2271 OFFSET(original_network_id), AV_OPT_TYPE_INT, { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, ENC },
2272 { "mpegts_service_id", "Set service_id field.",
2273 OFFSET(service_id), AV_OPT_TYPE_INT, { .i64 = 0x0001 }, 0x0001, 0xffff, ENC },
2274 { "mpegts_service_type", "Set service_type field.",
2275 OFFSET(service_type), AV_OPT_TYPE_INT, { .i64 = 0x01 }, 0x01, 0xff, ENC, "mpegts_service_type" },
2276 { "digital_tv", "Digital Television.",
2277 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_TV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2278 { "digital_radio", "Digital Radio.",
2279 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
2280 { "teletext", "Teletext.",
2281 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_TELETEXT }, 0x01, 0xff, ENC, "mpegts_service_type" },
2282 { "advanced_codec_digital_radio", "Advanced Codec Digital Radio.",
2283 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_RADIO }, 0x01, 0xff, ENC, "mpegts_service_type" },
2284 { "mpeg2_digital_hdtv", "MPEG2 Digital HDTV.",
2285 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_MPEG2_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2286 { "advanced_codec_digital_sdtv", "Advanced Codec Digital SDTV.",
2287 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_SDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2288 { "advanced_codec_digital_hdtv", "Advanced Codec Digital HDTV.",
2289 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_ADVANCED_CODEC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2290 { "hevc_digital_hdtv", "HEVC Digital Television Service.",
2291 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_SERVICE_TYPE_HEVC_DIGITAL_HDTV }, 0x01, 0xff, ENC, "mpegts_service_type" },
2292 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
2293 OFFSET(pmt_start_pid), AV_OPT_TYPE_INT, { .i64 = 0x1000 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2294 { "mpegts_start_pid", "Set the first pid.",
2295 OFFSET(start_pid), AV_OPT_TYPE_INT, { .i64 = 0x0100 }, FIRST_OTHER_PID, LAST_OTHER_PID, ENC },
2296 { "mpegts_m2ts_mode", "Enable m2ts mode.", OFFSET(m2ts_mode), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2297 { "muxrate", NULL, OFFSET(mux_rate), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
2298 { "pes_payload_size", "Minimum PES packet payload in bytes",
2299 OFFSET(pes_payload_size), AV_OPT_TYPE_INT, { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, ENC },
2300 { "mpegts_flags", "MPEG-TS muxing flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX, ENC, "mpegts_flags" },
2301 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
2302 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX, ENC, "mpegts_flags" },
2303 { "latm", "Use LATM packetization for AAC",
2304 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX, ENC, "mpegts_flags" },
2305 { "pat_pmt_at_frames", "Reemit PAT and PMT at each video frame",
2306 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_PAT_PMT_AT_FRAMES}, 0, INT_MAX, ENC, "mpegts_flags" },
2307 { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
2308 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX, ENC, "mpegts_flags" },
2309 { "initial_discontinuity", "Mark initial packets as discontinuous",
2310 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_DISCONT }, 0, INT_MAX, ENC, "mpegts_flags" },
2311 { "nit", "Enable NIT transmission",
2312 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_NIT}, 0, INT_MAX, ENC, "mpegts_flags" },
2313 { "mpegts_copyts", "don't offset dts/pts", OFFSET(copyts), AV_OPT_TYPE_BOOL, { .i64 = -1 }, -1, 1, ENC },
2314 { "tables_version", "set PAT, PMT, SDT and NIT version", OFFSET(tables_version), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 31, ENC },
2315 { "omit_video_pes_length", "Omit the PES packet length for video packets",
2316 OFFSET(omit_video_pes_length), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
2317 { "pcr_period", "PCR retransmission time in milliseconds",
2318 OFFSET(pcr_period_ms), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ENC },
2319 { "pat_period", "PAT/PMT retransmission time limit in seconds",
2320 OFFSET(pat_period_us), AV_OPT_TYPE_DURATION, { .i64 = PAT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2321 { "sdt_period", "SDT retransmission time limit in seconds",
2322 OFFSET(sdt_period_us), AV_OPT_TYPE_DURATION, { .i64 = SDT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2323 { "nit_period", "NIT retransmission time limit in seconds",
2324 OFFSET(nit_period_us), AV_OPT_TYPE_DURATION, { .i64 = NIT_RETRANS_TIME * 1000LL }, 0, INT64_MAX, ENC },
2325 { NULL },
2326 };
2327
2328 static const AVClass mpegts_muxer_class = {
2329 .class_name = "MPEGTS muxer",
2330 .item_name = av_default_item_name,
2331 .option = options,
2332 .version = LIBAVUTIL_VERSION_INT,
2333 };
2334
2335 const AVOutputFormat ff_mpegts_muxer = {
2336 .name = "mpegts",
2337 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
2338 .mime_type = "video/MP2T",
2339 .extensions = "ts,m2t,m2ts,mts",
2340 .priv_data_size = sizeof(MpegTSWrite),
2341 .audio_codec = AV_CODEC_ID_MP2,
2342 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
2343 .init = mpegts_init,
2344 .write_packet = mpegts_write_packet,
2345 .write_trailer = mpegts_write_end,
2346 .deinit = mpegts_deinit,
2347 .check_bitstream = mpegts_check_bitstream,
2348 .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS | AVFMT_NODIMENSIONS,
2349 .priv_class = &mpegts_muxer_class,
2350 };
2351