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