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Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavformat / mpegtsenc.c
CommitLineData
2ba45a60
DM		 1/*
2 * MPEG2 transport stream (aka DVB) muxer
3 * Copyright (c) 2003 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include "libavutil/avassert.h"
23#include "libavutil/bswap.h"
24#include "libavutil/crc.h"
25#include "libavutil/dict.h"
26#include "libavutil/intreadwrite.h"
27#include "libavutil/mathematics.h"
28#include "libavutil/opt.h"
29
30#include "libavcodec/internal.h"
31
32#include "avformat.h"
33#include "internal.h"
34#include "mpegts.h"
35
36#define PCR_TIME_BASE 27000000
37
38/* write DVB SI sections */
39
40/*********************************************/
41/* mpegts section writer */
42
43typedef struct MpegTSSection {
44 int pid;
45 int cc;
46 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
47 void *opaque;
48} MpegTSSection;
49
50typedef struct MpegTSService {
51 MpegTSSection pmt; /* MPEG2 pmt table context */
52 int sid; /* service ID */
53 char *name;
54 char *provider_name;
55 int pcr_pid;
56 int pcr_packet_count;
57 int pcr_packet_period;
58} MpegTSService;
59
60typedef struct MpegTSWrite {
61 const AVClass *av_class;
62 MpegTSSection pat; /* MPEG2 pat table */
63 MpegTSSection sdt; /* MPEG2 sdt table context */
64 MpegTSService **services;
65 int sdt_packet_count;
66 int sdt_packet_period;
67 int pat_packet_count;
68 int pat_packet_period;
69 int nb_services;
70 int onid;
71 int tsid;
72 int64_t first_pcr;
73 int mux_rate; ///< set to 1 when VBR
74 int pes_payload_size;
75
76 int transport_stream_id;
77 int original_network_id;
78 int service_id;
79
80 int pmt_start_pid;
81 int start_pid;
82 int m2ts_mode;
83
84 int reemit_pat_pmt; // backward compatibility
85
86 int pcr_period;
87#define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
88#define MPEGTS_FLAG_AAC_LATM 0x02
89 int flags;
90 int copyts;
91 int tables_version;
92
93 int omit_video_pes_length;
94} MpegTSWrite;
95
96/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
97#define DEFAULT_PES_HEADER_FREQ 16
98#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
99
100/* The section length is 12 bits. The first 2 are set to 0, the remaining
101 * 10 bits should not exceed 1021. */
102#define SECTION_LENGTH 1020
103
104/* NOTE: 4 bytes must be left at the end for the crc32 */
105static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
106{
107 unsigned int crc;
108 unsigned char packet[TS_PACKET_SIZE];
109 const unsigned char *buf_ptr;
110 unsigned char *q;
111 int first, b, len1, left;
112
113 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
114 -1, buf, len - 4));
115
116 buf[len - 4] = (crc >> 24) & 0xff;
117 buf[len - 3] = (crc >> 16) & 0xff;
118 buf[len - 2] = (crc >> 8) & 0xff;
119 buf[len - 1] = crc & 0xff;
120
121 /* send each packet */
122 buf_ptr = buf;
123 while (len > 0) {
124 first = buf == buf_ptr;
125 q = packet;
126 *q++ = 0x47;
127 b = s->pid >> 8;
128 if (first)
129 b |= 0x40;
130 *q++ = b;
131 *q++ = s->pid;
132 s->cc = s->cc + 1 & 0xf;
133 *q++ = 0x10 | s->cc;
134 if (first)
135 *q++ = 0; /* 0 offset */
136 len1 = TS_PACKET_SIZE - (q - packet);
137 if (len1 > len)
138 len1 = len;
139 memcpy(q, buf_ptr, len1);
140 q += len1;
141 /* add known padding data */
142 left = TS_PACKET_SIZE - (q - packet);
143 if (left > 0)
144 memset(q, 0xff, left);
145
146 s->write_packet(s, packet);
147
148 buf_ptr += len1;
149 len -= len1;
150 }
151}
152
153static inline void put16(uint8_t **q_ptr, int val)
154{
155 uint8_t *q;
156 q = *q_ptr;
157 *q++ = val >> 8;
158 *q++ = val;
159 *q_ptr = q;
160}
161
162static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
163 int version, int sec_num, int last_sec_num,
164 uint8_t *buf, int len)
165{
166 uint8_t section[1024], *q;
167 unsigned int tot_len;
168 /* reserved_future_use field must be set to 1 for SDT */
169 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
170
171 tot_len = 3 + 5 + len + 4;
172 /* check if not too big */
173 if (tot_len > 1024)
174 return AVERROR_INVALIDDATA;
175
176 q = section;
177 *q++ = tid;
178 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
179 put16(&q, id);
180 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
181 *q++ = sec_num;
182 *q++ = last_sec_num;
183 memcpy(q, buf, len);
184
185 mpegts_write_section(s, section, tot_len);
186 return 0;
187}
188
189/*********************************************/
190/* mpegts writer */
191
192#define DEFAULT_PROVIDER_NAME "FFmpeg"
193#define DEFAULT_SERVICE_NAME "Service01"
194
195/* we retransmit the SI info at this rate */
196#define SDT_RETRANS_TIME 500
197#define PAT_RETRANS_TIME 100
198#define PCR_RETRANS_TIME 20
199
200typedef struct MpegTSWriteStream {
201 struct MpegTSService *service;
202 int pid; /* stream associated pid */
203 int cc;
204 int payload_size;
205 int first_pts_check; ///< first pts check needed
206 int prev_payload_key;
207 int64_t payload_pts;
208 int64_t payload_dts;
209 int payload_flags;
210 uint8_t *payload;
211 AVFormatContext *amux;
212 AVRational user_tb;
213} MpegTSWriteStream;
214
215static void mpegts_write_pat(AVFormatContext *s)
216{
217 MpegTSWrite *ts = s->priv_data;
218 MpegTSService *service;
219 uint8_t data[SECTION_LENGTH], *q;
220 int i;
221
222 q = data;
223 for (i = 0; i < ts->nb_services; i++) {
224 service = ts->services[i];
225 put16(&q, service->sid);
226 put16(&q, 0xe000 | service->pmt.pid);
227 }
228 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,
229 data, q - data);
230}
231
232static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
233{
234 MpegTSWrite *ts = s->priv_data;
235 uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
236 int val, stream_type, i, err = 0;
237
238 q = data;
239 put16(&q, 0xe000 | service->pcr_pid);
240
241 program_info_length_ptr = q;
242 q += 2; /* patched after */
243
244 /* put program info here */
245
246 val = 0xf000 | (q - program_info_length_ptr - 2);
247 program_info_length_ptr[0] = val >> 8;
248 program_info_length_ptr[1] = val;
249
250 for (i = 0; i < s->nb_streams; i++) {
251 AVStream *st = s->streams[i];
252 MpegTSWriteStream *ts_st = st->priv_data;
253 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
254
255 if (q - data > SECTION_LENGTH - 32) {
256 err = 1;
257 break;
258 }
259 switch (st->codec->codec_id) {
260 case AV_CODEC_ID_MPEG1VIDEO:
261 case AV_CODEC_ID_MPEG2VIDEO:
262 stream_type = STREAM_TYPE_VIDEO_MPEG2;
263 break;
264 case AV_CODEC_ID_MPEG4:
265 stream_type = STREAM_TYPE_VIDEO_MPEG4;
266 break;
267 case AV_CODEC_ID_H264:
268 stream_type = STREAM_TYPE_VIDEO_H264;
269 break;
270 case AV_CODEC_ID_HEVC:
271 stream_type = STREAM_TYPE_VIDEO_HEVC;
272 break;
273 case AV_CODEC_ID_CAVS:
274 stream_type = STREAM_TYPE_VIDEO_CAVS;
275 break;
276 case AV_CODEC_ID_DIRAC:
277 stream_type = STREAM_TYPE_VIDEO_DIRAC;
278 break;
279 case AV_CODEC_ID_MP2:
280 case AV_CODEC_ID_MP3:
281 stream_type = STREAM_TYPE_AUDIO_MPEG1;
282 break;
283 case AV_CODEC_ID_AAC:
284 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
285 ? STREAM_TYPE_AUDIO_AAC_LATM
286 : STREAM_TYPE_AUDIO_AAC;
287 break;
288 case AV_CODEC_ID_AAC_LATM:
289 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
290 break;
291 case AV_CODEC_ID_AC3:
292 stream_type = STREAM_TYPE_AUDIO_AC3;
293 break;
294 case AV_CODEC_ID_DTS:
295 stream_type = STREAM_TYPE_AUDIO_DTS;
296 break;
297 case AV_CODEC_ID_TRUEHD:
298 stream_type = STREAM_TYPE_AUDIO_TRUEHD;
299 break;
300 default:
301 stream_type = STREAM_TYPE_PRIVATE_DATA;
302 break;
303 }
304
305 *q++ = stream_type;
306 put16(&q, 0xe000 | ts_st->pid);
307 desc_length_ptr = q;
308 q += 2; /* patched after */
309
310 /* write optional descriptors here */
311 switch (st->codec->codec_type) {
312 case AVMEDIA_TYPE_AUDIO:
313 if (st->codec->codec_id==AV_CODEC_ID_EAC3) {
314 *q++=0x7a; // EAC3 descriptor see A038 DVB SI
315 *q++=1; // 1 byte, all flags sets to 0
316 *q++=0; // omit all fields...
317 }
318 if (st->codec->codec_id==AV_CODEC_ID_S302M) {
319 *q++ = 0x05; /* MPEG-2 registration descriptor*/
320 *q++ = 4;
321 *q++ = 'B';
322 *q++ = 'S';
323 *q++ = 'S';
324 *q++ = 'D';
325 }
326
327 if (lang) {
328 char *p;
329 char *next = lang->value;
330 uint8_t *len_ptr;
331
332 *q++ = 0x0a; /* ISO 639 language descriptor */
333 len_ptr = q++;
334 *len_ptr = 0;
335
336 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
337 if (q - data > SECTION_LENGTH - 4) {
338 err = 1;
339 break;
340 }
341 next = strchr(p, ',');
342 if (strlen(p) != 3 && (!next || next != p + 3))
343 continue; /* not a 3-letter code */
344
345 *q++ = *p++;
346 *q++ = *p++;
347 *q++ = *p++;
348
349 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
350 *q++ = 0x01;
351 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
352 *q++ = 0x02;
353 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
354 *q++ = 0x03;
355 else
356 *q++ = 0; /* undefined type */
357
358 *len_ptr += 4;
359 }
360
361 if (*len_ptr == 0)
362 q -= 2; /* no language codes were written */
363 }
364 break;
365 case AVMEDIA_TYPE_SUBTITLE:
366 {
367 const char default_language[] = "und";
368 const char *language = lang && strlen(lang->value) >= 3 ? lang->value : default_language;
369
370 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
371 uint8_t *len_ptr;
372 int extradata_copied = 0;
373
374 *q++ = 0x59; /* subtitling_descriptor */
375 len_ptr = q++;
376
377 while (strlen(language) >= 3) {
378 if (sizeof(data) - (q - data) < 8) { /* 8 bytes per DVB subtitle substream data */
379 err = 1;
380 break;
381 }
382 *q++ = *language++;
383 *q++ = *language++;
384 *q++ = *language++;
385 /* Skip comma */
386 if (*language != '\0')
387 language++;
388
389 if (st->codec->extradata_size - extradata_copied >= 5) {
390 *q++ = st->codec->extradata[extradata_copied + 4]; /* subtitling_type */
391 memcpy(q, st->codec->extradata + extradata_copied, 4); /* composition_page_id and ancillary_page_id */
392 extradata_copied += 5;
393 q += 4;
394 } else {
395 /* subtitling_type:
396 * 0x10 - normal with no monitor aspect ratio criticality
397 * 0x20 - for the hard of hearing with no monitor aspect ratio criticality */
398 *q++ = (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) ? 0x20 : 0x10;
399 if ((st->codec->extradata_size == 4) && (extradata_copied == 0)) {
400 /* support of old 4-byte extradata format */
401 memcpy(q, st->codec->extradata, 4); /* composition_page_id and ancillary_page_id */
402 extradata_copied += 4;
403 q += 4;
404 } else {
405 put16(&q, 1); /* composition_page_id */
406 put16(&q, 1); /* ancillary_page_id */
407 }
408 }
409 }
410
411 *len_ptr = q - len_ptr - 1;
412 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
413 uint8_t *len_ptr = NULL;
414 int extradata_copied = 0;
415
416 /* The descriptor tag. teletext_descriptor */
417 *q++ = 0x56;
418 len_ptr = q++;
419
420 while (strlen(language) >= 3 && q - data < sizeof(data) - 6) {
421 *q++ = *language++;
422 *q++ = *language++;
423 *q++ = *language++;
424 /* Skip comma */
425 if (*language != '\0')
426 language++;
427
428 if (st->codec->extradata_size - 1 > extradata_copied) {
429 memcpy(q, st->codec->extradata + extradata_copied, 2);
430 extradata_copied += 2;
431 q += 2;
432 } else {
433 /* The Teletext descriptor:
434 * teletext_type: This 5-bit field indicates the type of Teletext page indicated. (0x01 Initial Teletext page)
435 * teletext_magazine_number: This is a 3-bit field which identifies the magazine number.
436 * teletext_page_number: This is an 8-bit field giving two 4-bit hex digits identifying the page number. */
437 *q++ = 0x08;
438 *q++ = 0x00;
439 }
440 }
441
442 *len_ptr = q - len_ptr - 1;
443 }
444 }
445 break;
446 case AVMEDIA_TYPE_VIDEO:
447 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
448 *q++ = 0x05; /*MPEG-2 registration descriptor*/
449 *q++ = 4;
450 *q++ = 'd';
451 *q++ = 'r';
452 *q++ = 'a';
453 *q++ = 'c';
454 }
455 break;
456 case AVMEDIA_TYPE_DATA:
457 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {
458 *q++ = 0x05; /* MPEG-2 registration descriptor */
459 *q++ = 4;
460 *q++ = 'K';
461 *q++ = 'L';
462 *q++ = 'V';
463 *q++ = 'A';
464 }
465 break;
466 }
467
468 val = 0xf000 | (q - desc_length_ptr - 2);
469 desc_length_ptr[0] = val >> 8;
470 desc_length_ptr[1] = val;
471 }
472
473 if (err)
474 av_log(s, AV_LOG_ERROR,
475 "The PMT section cannot fit stream %d and all following streams.\n"
476 "Try reducing the number of languages in the audio streams "
477 "or the total number of streams.\n", i);
478
479 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,
480 data, q - data);
481 return 0;
482}
483
484/* NOTE: !str is accepted for an empty string */
485static void putstr8(uint8_t **q_ptr, const char *str)
486{
487 uint8_t *q;
488 int len;
489
490 q = *q_ptr;
491 if (!str)
492 len = 0;
493 else
494 len = strlen(str);
495 *q++ = len;
496 memcpy(q, str, len);
497 q += len;
498 *q_ptr = q;
499}
500
501static void mpegts_write_sdt(AVFormatContext *s)
502{
503 MpegTSWrite *ts = s->priv_data;
504 MpegTSService *service;
505 uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
506 int i, running_status, free_ca_mode, val;
507
508 q = data;
509 put16(&q, ts->onid);
510 *q++ = 0xff;
511 for (i = 0; i < ts->nb_services; i++) {
512 service = ts->services[i];
513 put16(&q, service->sid);
514 *q++ = 0xfc | 0x00; /* currently no EIT info */
515 desc_list_len_ptr = q;
516 q += 2;
517 running_status = 4; /* running */
518 free_ca_mode = 0;
519
520 /* write only one descriptor for the service name and provider */
521 *q++ = 0x48;
522 desc_len_ptr = q;
523 q++;
524 *q++ = 0x01; /* digital television service */
525 putstr8(&q, service->provider_name);
526 putstr8(&q, service->name);
527 desc_len_ptr[0] = q - desc_len_ptr - 1;
528
529 /* fill descriptor length */
530 val = (running_status << 13) | (free_ca_mode << 12) |
531 (q - desc_list_len_ptr - 2);
532 desc_list_len_ptr[0] = val >> 8;
533 desc_list_len_ptr[1] = val;
534 }
535 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,
536 data, q - data);
537}
538
539static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
540 const char *provider_name,
541 const char *name)
542{
543 MpegTSService *service;
544
545 service = av_mallocz(sizeof(MpegTSService));
546 if (!service)
547 return NULL;
548 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
549 service->sid = sid;
550 service->pcr_pid = 0x1fff;
551 service->provider_name = av_strdup(provider_name);
552 service->name = av_strdup(name);
553 if (!service->provider_name || !service->name)
554 goto fail;
555 if (av_dynarray_add_nofree(&ts->services, &ts->nb_services, service) < 0)
556 goto fail;
557
558 return service;
559fail:
560 av_freep(&service->provider_name);
561 av_freep(&service->name);
562 av_free(service);
563 return NULL;
564}
565
566static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
567{
568 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
569 ts->first_pcr;
570}
571
572static void mpegts_prefix_m2ts_header(AVFormatContext *s)
573{
574 MpegTSWrite *ts = s->priv_data;
575 if (ts->m2ts_mode) {
576 int64_t pcr = get_pcr(s->priv_data, s->pb);
577 uint32_t tp_extra_header = pcr % 0x3fffffff;
578 tp_extra_header = AV_RB32(&tp_extra_header);
579 avio_write(s->pb, (unsigned char *) &tp_extra_header,
f6fa7814 580 sizeof(tp_extra_header));
2ba45a60
DM		 581 }
582}
583
584static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
585{
586 AVFormatContext *ctx = s->opaque;
587 mpegts_prefix_m2ts_header(ctx);
588 avio_write(ctx->pb, packet, TS_PACKET_SIZE);
589}
590
591static int mpegts_write_header(AVFormatContext *s)
592{
593 MpegTSWrite *ts = s->priv_data;
594 MpegTSWriteStream *ts_st;
595 MpegTSService *service;
596 AVStream *st, *pcr_st = NULL;
597 AVDictionaryEntry *title, *provider;
598 int i, j;
599 const char *service_name;
600 const char *provider_name;
601 int *pids;
602 int ret;
603
604 if (s->max_delay < 0) /* Not set by the caller */
605 s->max_delay = 0;
606
607 // round up to a whole number of TS packets
608 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
609
610 ts->tsid = ts->transport_stream_id;
611 ts->onid = ts->original_network_id;
612 /* allocate a single DVB service */
613 title = av_dict_get(s->metadata, "service_name", NULL, 0);
614 if (!title)
615 title = av_dict_get(s->metadata, "title", NULL, 0);
616 service_name = title ? title->value : DEFAULT_SERVICE_NAME;
617 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
618 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
619 service = mpegts_add_service(ts, ts->service_id,
620 provider_name, service_name);
621
622 if (!service)
623 return AVERROR(ENOMEM);
624
625 service->pmt.write_packet = section_write_packet;
626 service->pmt.opaque = s;
627 service->pmt.cc = 15;
628
629 ts->pat.pid = PAT_PID;
630 /* Initialize at 15 so that it wraps and is equal to 0 for the
631 * first packet we write. */
632 ts->pat.cc = 15;
633 ts->pat.write_packet = section_write_packet;
634 ts->pat.opaque = s;
635
636 ts->sdt.pid = SDT_PID;
637 ts->sdt.cc = 15;
638 ts->sdt.write_packet = section_write_packet;
639 ts->sdt.opaque = s;
640
641 pids = av_malloc_array(s->nb_streams, sizeof(*pids));
642 if (!pids) {
643 ret = AVERROR(ENOMEM);
644 goto fail;
645 }
646
647 /* assign pids to each stream */
648 for (i = 0; i < s->nb_streams; i++) {
649 st = s->streams[i];
650
651 ts_st = av_mallocz(sizeof(MpegTSWriteStream));
652 if (!ts_st) {
653 ret = AVERROR(ENOMEM);
654 goto fail;
655 }
656 st->priv_data = ts_st;
657
658 ts_st->user_tb = st->time_base;
659 avpriv_set_pts_info(st, 33, 1, 90000);
660
661 ts_st->payload = av_mallocz(ts->pes_payload_size);
662 if (!ts_st->payload) {
663 ret = AVERROR(ENOMEM);
664 goto fail;
665 }
666 ts_st->service = service;
667 /* MPEG pid values < 16 are reserved. Applications which set st->id in
668 * this range are assigned a calculated pid. */
669 if (st->id < 16) {
670 ts_st->pid = ts->start_pid + i;
671 } else if (st->id < 0x1FFF) {
672 ts_st->pid = st->id;
673 } else {
674 av_log(s, AV_LOG_ERROR,
675 "Invalid stream id %d, must be less than 8191\n", st->id);
676 ret = AVERROR(EINVAL);
677 goto fail;
678 }
679 if (ts_st->pid == service->pmt.pid) {
680 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
681 ret = AVERROR(EINVAL);
682 goto fail;
683 }
684 for (j = 0; j < i; j++) {
685 if (pids[j] == ts_st->pid) {
686 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
687 ret = AVERROR(EINVAL);
688 goto fail;
689 }
690 }
691 pids[i] = ts_st->pid;
692 ts_st->payload_pts = AV_NOPTS_VALUE;
693 ts_st->payload_dts = AV_NOPTS_VALUE;
694 ts_st->first_pts_check = 1;
695 ts_st->cc = 15;
696 /* update PCR pid by using the first video stream */
697 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
698 service->pcr_pid == 0x1fff) {
699 service->pcr_pid = ts_st->pid;
700 pcr_st = st;
701 }
702 if (st->codec->codec_id == AV_CODEC_ID_AAC &&
703 st->codec->extradata_size > 0) {
704 AVStream *ast;
705 ts_st->amux = avformat_alloc_context();
706 if (!ts_st->amux) {
707 ret = AVERROR(ENOMEM);
708 goto fail;
709 }
710 ts_st->amux->oformat =
711 av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
712 NULL, NULL);
713 if (!ts_st->amux->oformat) {
714 ret = AVERROR(EINVAL);
715 goto fail;
716 }
717 if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
718 ret = AVERROR(ENOMEM);
719 goto fail;
720 }
721 ret = avcodec_copy_context(ast->codec, st->codec);
722 if (ret != 0)
723 goto fail;
f6fa7814 724 ast->time_base = st->time_base;
2ba45a60
DM		 725 ret = avformat_write_header(ts_st->amux, NULL);
726 if (ret < 0)
727 goto fail;
728 }
729 }
730
731 av_freep(&pids);
732
733 /* if no video stream, use the first stream as PCR */
734 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
735 pcr_st = s->streams[0];
736 ts_st = pcr_st->priv_data;
737 service->pcr_pid = ts_st->pid;
738 } else
739 ts_st = pcr_st->priv_data;
740
741 if (ts->mux_rate > 1) {
742 service->pcr_packet_period = (ts->mux_rate * ts->pcr_period) /
743 (TS_PACKET_SIZE * 8 * 1000);
744 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
745 (TS_PACKET_SIZE * 8 * 1000);
746 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
747 (TS_PACKET_SIZE * 8 * 1000);
748
749 if (ts->copyts < 1)
750 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
751 } else {
752 /* Arbitrary values, PAT/PMT will also be written on video key frames */
753 ts->sdt_packet_period = 200;
754 ts->pat_packet_period = 40;
755 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
756 if (!pcr_st->codec->frame_size) {
757 av_log(s, AV_LOG_WARNING, "frame size not set\n");
758 service->pcr_packet_period =
759 pcr_st->codec->sample_rate / (10 * 512);
760 } else {
761 service->pcr_packet_period =
762 pcr_st->codec->sample_rate / (10 * pcr_st->codec->frame_size);
763 }
764 } else {
765 // max delta PCR 0.1s
766 // TODO: should be avg_frame_rate
767 service->pcr_packet_period =
768 ts_st->user_tb.den / (10 * ts_st->user_tb.num);
769 }
770 if (!service->pcr_packet_period)
771 service->pcr_packet_period = 1;
772 }
773
774 // output a PCR as soon as possible
775 service->pcr_packet_count = service->pcr_packet_period;
776 ts->pat_packet_count = ts->pat_packet_period - 1;
777 ts->sdt_packet_count = ts->sdt_packet_period - 1;
778
779 if (ts->mux_rate == 1)
780 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
781 else
782 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
783 av_log(s, AV_LOG_VERBOSE,
784 "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
785 service->pcr_packet_period,
786 ts->sdt_packet_period, ts->pat_packet_period);
787
788 if (ts->m2ts_mode == -1) {
789 if (av_match_ext(s->filename, "m2ts")) {
790 ts->m2ts_mode = 1;
791 } else {
792 ts->m2ts_mode = 0;
793 }
794 }
795
796 return 0;
797
798fail:
799 av_freep(&pids);
800 for (i = 0; i < s->nb_streams; i++) {
801 st = s->streams[i];
802 ts_st = st->priv_data;
803 if (ts_st) {
804 av_freep(&ts_st->payload);
805 if (ts_st->amux) {
806 avformat_free_context(ts_st->amux);
807 ts_st->amux = NULL;
808 }
809 }
810 av_freep(&st->priv_data);
811 }
812
813 for (i = 0; i < ts->nb_services; i++) {
814 service = ts->services[i];
815 av_freep(&service->provider_name);
816 av_freep(&service->name);
817 av_free(service);
818 }
819 av_free(ts->services);
820 return ret;
821}
822
823/* send SDT, PAT and PMT tables regulary */
824static void retransmit_si_info(AVFormatContext *s, int force_pat)
825{
826 MpegTSWrite *ts = s->priv_data;
827 int i;
828
829 if (++ts->sdt_packet_count == ts->sdt_packet_period) {
830 ts->sdt_packet_count = 0;
831 mpegts_write_sdt(s);
832 }
833 if (++ts->pat_packet_count == ts->pat_packet_period || force_pat) {
834 ts->pat_packet_count = 0;
835 mpegts_write_pat(s);
836 for (i = 0; i < ts->nb_services; i++)
837 mpegts_write_pmt(s, ts->services[i]);
838 }
839}
840
841static int write_pcr_bits(uint8_t *buf, int64_t pcr)
842{
843 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
844
845 *buf++ = pcr_high >> 25;
846 *buf++ = pcr_high >> 17;
847 *buf++ = pcr_high >> 9;
848 *buf++ = pcr_high >> 1;
849 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
850 *buf++ = pcr_low;
851
852 return 6;
853}
854
855/* Write a single null transport stream packet */
856static void mpegts_insert_null_packet(AVFormatContext *s)
857{
858 uint8_t *q;
859 uint8_t buf[TS_PACKET_SIZE];
860
861 q = buf;
862 *q++ = 0x47;
863 *q++ = 0x00 | 0x1f;
864 *q++ = 0xff;
865 *q++ = 0x10;
866 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
867 mpegts_prefix_m2ts_header(s);
868 avio_write(s->pb, buf, TS_PACKET_SIZE);
869}
870
871/* Write a single transport stream packet with a PCR and no payload */
872static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
873{
874 MpegTSWrite *ts = s->priv_data;
875 MpegTSWriteStream *ts_st = st->priv_data;
876 uint8_t *q;
877 uint8_t buf[TS_PACKET_SIZE];
878
879 q = buf;
880 *q++ = 0x47;
881 *q++ = ts_st->pid >> 8;
882 *q++ = ts_st->pid;
883 *q++ = 0x20 | ts_st->cc; /* Adaptation only */
884 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
885 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
886 *q++ = 0x10; /* Adaptation flags: PCR present */
887
888 /* PCR coded into 6 bytes */
889 q += write_pcr_bits(q, get_pcr(ts, s->pb));
890
891 /* stuffing bytes */
892 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
893 mpegts_prefix_m2ts_header(s);
894 avio_write(s->pb, buf, TS_PACKET_SIZE);
895}
896
897static void write_pts(uint8_t *q, int fourbits, int64_t pts)
898{
899 int val;
900
901 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
902 *q++ = val;
903 val = (((pts >> 15) & 0x7fff) << 1) | 1;
904 *q++ = val >> 8;
905 *q++ = val;
906 val = (((pts) & 0x7fff) << 1) | 1;
907 *q++ = val >> 8;
908 *q++ = val;
909}
910
911/* Set an adaptation field flag in an MPEG-TS packet*/
912static void set_af_flag(uint8_t *pkt, int flag)
913{
914 // expect at least one flag to set
915 av_assert0(flag);
916
917 if ((pkt[3] & 0x20) == 0) {
918 // no AF yet, set adaptation field flag
919 pkt[3] |= 0x20;
920 // 1 byte length, no flags
921 pkt[4] = 1;
922 pkt[5] = 0;
923 }
924 pkt[5] |= flag;
925}
926
927/* Extend the adaptation field by size bytes */
928static void extend_af(uint8_t *pkt, int size)
929{
930 // expect already existing adaptation field
931 av_assert0(pkt[3] & 0x20);
932 pkt[4] += size;
933}
934
935/* Get a pointer to MPEG-TS payload (right after TS packet header) */
936static uint8_t *get_ts_payload_start(uint8_t *pkt)
937{
938 if (pkt[3] & 0x20)
939 return pkt + 5 + pkt[4];
940 else
941 return pkt + 4;
942}
943
944/* Add a PES header to the front of the payload, and segment into an integer
945 * number of TS packets. The final TS packet is padded using an oversized
946 * adaptation header to exactly fill the last TS packet.
947 * NOTE: 'payload' contains a complete PES payload. */
948static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
949 const uint8_t *payload, int payload_size,
950 int64_t pts, int64_t dts, int key)
951{
952 MpegTSWriteStream *ts_st = st->priv_data;
953 MpegTSWrite *ts = s->priv_data;
954 uint8_t buf[TS_PACKET_SIZE];
955 uint8_t *q;
956 int val, is_start, len, header_len, write_pcr, is_dvb_subtitle, is_dvb_teletext, flags;
957 int afc_len, stuffing_len;
958 int64_t pcr = -1; /* avoid warning */
959 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
960 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;
961
962 is_start = 1;
963 while (payload_size > 0) {
964 retransmit_si_info(s, force_pat);
965 force_pat = 0;
966
967 write_pcr = 0;
968 if (ts_st->pid == ts_st->service->pcr_pid) {
969 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
970 ts_st->service->pcr_packet_count++;
971 if (ts_st->service->pcr_packet_count >=
972 ts_st->service->pcr_packet_period) {
973 ts_st->service->pcr_packet_count = 0;
974 write_pcr = 1;
975 }
976 }
977
978 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
979 (dts - get_pcr(ts, s->pb) / 300) > delay) {
980 /* pcr insert gets priority over null packet insert */
981 if (write_pcr)
982 mpegts_insert_pcr_only(s, st);
983 else
984 mpegts_insert_null_packet(s);
985 /* recalculate write_pcr and possibly retransmit si_info */
986 continue;
987 }
988
989 /* prepare packet header */
990 q = buf;
991 *q++ = 0x47;
992 val = ts_st->pid >> 8;
993 if (is_start)
994 val |= 0x40;
995 *q++ = val;
996 *q++ = ts_st->pid;
997 ts_st->cc = ts_st->cc + 1 & 0xf;
998 *q++ = 0x10 | ts_st->cc; // payload indicator + CC
999 if (key && is_start && pts != AV_NOPTS_VALUE) {
1000 // set Random Access for key frames
1001 if (ts_st->pid == ts_st->service->pcr_pid)
1002 write_pcr = 1;
1003 set_af_flag(buf, 0x40);
1004 q = get_ts_payload_start(buf);
1005 }
1006 if (write_pcr) {
1007 set_af_flag(buf, 0x10);
1008 q = get_ts_payload_start(buf);
1009 // add 11, pcr references the last byte of program clock reference base
1010 if (ts->mux_rate > 1)
1011 pcr = get_pcr(ts, s->pb);
1012 else
1013 pcr = (dts - delay) * 300;
1014 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
1015 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
1016 extend_af(buf, write_pcr_bits(q, pcr));
1017 q = get_ts_payload_start(buf);
1018 }
1019 if (is_start) {
1020 int pes_extension = 0;
1021 int pes_header_stuffing_bytes = 0;
1022 /* write PES header */
1023 *q++ = 0x00;
1024 *q++ = 0x00;
1025 *q++ = 0x01;
1026 is_dvb_subtitle = 0;
1027 is_dvb_teletext = 0;
1028 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1029 if (st->codec->codec_id == AV_CODEC_ID_DIRAC)
1030 *q++ = 0xfd;
1031 else
1032 *q++ = 0xe0;
1033 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1034 (st->codec->codec_id == AV_CODEC_ID_MP2 ||
1035 st->codec->codec_id == AV_CODEC_ID_MP3 ||
1036 st->codec->codec_id == AV_CODEC_ID_AAC)) {
1037 *q++ = 0xc0;
1038 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1039 st->codec->codec_id == AV_CODEC_ID_AC3 &&
1040 ts->m2ts_mode) {
1041 *q++ = 0xfd;
1042 } else {
1043 *q++ = 0xbd;
1044 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
1045 if (st->codec->codec_id == AV_CODEC_ID_DVB_SUBTITLE) {
1046 is_dvb_subtitle = 1;
1047 } else if (st->codec->codec_id == AV_CODEC_ID_DVB_TELETEXT) {
1048 is_dvb_teletext = 1;
1049 }
1050 }
1051 }
1052 header_len = 0;
1053 flags = 0;
1054 if (pts != AV_NOPTS_VALUE) {
1055 header_len += 5;
1056 flags |= 0x80;
1057 }
1058 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1059 header_len += 5;
1060 flags |= 0x40;
1061 }
1062 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
1063 st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1064 /* set PES_extension_flag */
1065 pes_extension = 1;
1066 flags |= 0x01;
1067
1068 /* One byte for PES2 extension flag +
1069 * one byte for extension length +
1070 * one byte for extension id */
1071 header_len += 3;
1072 }
1073 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow
1074 * otherwise it will not play sound on blu-ray
1075 */
1076 if (ts->m2ts_mode &&
1077 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
1078 st->codec->codec_id == AV_CODEC_ID_AC3) {
1079 /* set PES_extension_flag */
1080 pes_extension = 1;
1081 flags |= 0x01;
1082 header_len += 3;
1083 }
1084 if (is_dvb_teletext) {
1085 pes_header_stuffing_bytes = 0x24 - header_len;
1086 header_len = 0x24;
1087 }
1088 len = payload_size + header_len + 3;
1089 /* 3 extra bytes should be added to DVB subtitle payload: 0x20 0x00 at the beginning and trailing 0xff */
1090 if (is_dvb_subtitle) {
1091 len += 3;
1092 payload_size++;
1093 }
1094 if (len > 0xffff)
1095 len = 0;
1096 if (ts->omit_video_pes_length && st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1097 len = 0;
1098 }
1099 *q++ = len >> 8;
1100 *q++ = len;
1101 val = 0x80;
1102 /* data alignment indicator is required for subtitle and data streams */
1103 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)
1104 val |= 0x04;
1105 *q++ = val;
1106 *q++ = flags;
1107 *q++ = header_len;
1108 if (pts != AV_NOPTS_VALUE) {
1109 write_pts(q, flags >> 6, pts);
1110 q += 5;
1111 }
1112 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
1113 write_pts(q, 1, dts);
1114 q += 5;
1115 }
1116 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {
1117 flags = 0x01; /* set PES_extension_flag_2 */
1118 *q++ = flags;
1119 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1120 /* Set the stream ID extension flag bit to 0 and
1121 * write the extended stream ID. */
1122 *q++ = 0x00 | 0x60;
1123 }
1124 /* For Blu-ray AC3 Audio Setting extended flags */
1125 if (ts->m2ts_mode &&
1126 pes_extension &&
1127 st->codec->codec_id == AV_CODEC_ID_AC3) {
1128 flags = 0x01; /* set PES_extension_flag_2 */
1129 *q++ = flags;
1130 *q++ = 0x80 | 0x01; /* marker bit + extension length */
1131 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */
1132 }
1133
1134
1135 if (is_dvb_subtitle) {
1136 /* First two fields of DVB subtitles PES data:
1137 * data_identifier: for DVB subtitle streams shall be coded with the value 0x20
1138 * subtitle_stream_id: for DVB subtitle stream shall be identified by the value 0x00 */
1139 *q++ = 0x20;
1140 *q++ = 0x00;
1141 }
1142 if (is_dvb_teletext) {
1143 memset(q, 0xff, pes_header_stuffing_bytes);
1144 q += pes_header_stuffing_bytes;
1145 }
1146 is_start = 0;
1147 }
1148 /* header size */
1149 header_len = q - buf;
1150 /* data len */
1151 len = TS_PACKET_SIZE - header_len;
1152 if (len > payload_size)
1153 len = payload_size;
1154 stuffing_len = TS_PACKET_SIZE - header_len - len;
1155 if (stuffing_len > 0) {
1156 /* add stuffing with AFC */
1157 if (buf[3] & 0x20) {
1158 /* stuffing already present: increase its size */
1159 afc_len = buf[4] + 1;
1160 memmove(buf + 4 + afc_len + stuffing_len,
1161 buf + 4 + afc_len,
1162 header_len - (4 + afc_len));
1163 buf[4] += stuffing_len;
1164 memset(buf + 4 + afc_len, 0xff, stuffing_len);
1165 } else {
1166 /* add stuffing */
1167 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
1168 buf[3] |= 0x20;
1169 buf[4] = stuffing_len - 1;
1170 if (stuffing_len >= 2) {
1171 buf[5] = 0x00;
1172 memset(buf + 6, 0xff, stuffing_len - 2);
1173 }
1174 }
1175 }
1176
1177 if (is_dvb_subtitle && payload_size == len) {
1178 memcpy(buf + TS_PACKET_SIZE - len, payload, len - 1);
1179 buf[TS_PACKET_SIZE - 1] = 0xff; /* end_of_PES_data_field_marker: an 8-bit field with fixed contents 0xff for DVB subtitle */
1180 } else {
1181 memcpy(buf + TS_PACKET_SIZE - len, payload, len);
1182 }
1183
1184 payload += len;
1185 payload_size -= len;
1186 mpegts_prefix_m2ts_header(s);
1187 avio_write(s->pb, buf, TS_PACKET_SIZE);
1188 }
1189 ts_st->prev_payload_key = key;
1190}
1191
1192int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1193{
1194 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
1195 if (!st->nb_frames) {
1196 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
1197 "no startcode found, use the video bitstream filter 'h264_mp4toannexb' to fix it "
1198 "('-bsf:v h264_mp4toannexb' option with ffmpeg)\n");
1199 return AVERROR_INVALIDDATA;
1200 }
f6fa7814
DM		 1201 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing, size %d", pkt->size);
1202 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1203 av_log(s, AV_LOG_WARNING, "\n");
2ba45a60
DM		 1204 }
1205 return 0;
1206}
1207
1208static int check_hevc_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
1209{
1210 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
1211 if (!st->nb_frames) {
1212 av_log(s, AV_LOG_ERROR, "HEVC bitstream malformed, no startcode found\n");
1213 return AVERROR_PATCHWELCOME;
1214 }
f6fa7814
DM		 1215 av_log(s, AV_LOG_WARNING, "HEVC bitstream error, startcode missing, size %d", pkt->size);
1216 if (pkt->size) av_log(s, AV_LOG_WARNING, " data %08X", AV_RB32(pkt->data));
1217 av_log(s, AV_LOG_WARNING, "\n");
2ba45a60
DM		 1218 }
1219 return 0;
1220}
1221
1222static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
1223{
1224 AVStream *st = s->streams[pkt->stream_index];
1225 int size = pkt->size;
1226 uint8_t *buf = pkt->data;
1227 uint8_t *data = NULL;
1228 MpegTSWrite *ts = s->priv_data;
1229 MpegTSWriteStream *ts_st = st->priv_data;
1230 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
1231 int64_t dts = pkt->dts, pts = pkt->pts;
1232
1233 if (ts->reemit_pat_pmt) {
1234 av_log(s, AV_LOG_WARNING,
1235 "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
1236 ts->reemit_pat_pmt = 0;
1237 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
1238 }
1239
1240 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
1241 ts->pat_packet_count = ts->pat_packet_period - 1;
1242 ts->sdt_packet_count = ts->sdt_packet_period - 1;
1243 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
1244 }
1245
1246 if (ts->copyts < 1) {
1247 if (pts != AV_NOPTS_VALUE)
1248 pts += delay;
1249 if (dts != AV_NOPTS_VALUE)
1250 dts += delay;
1251 }
1252
1253 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
1254 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");
1255 return AVERROR_INVALIDDATA;
1256 }
1257 ts_st->first_pts_check = 0;
1258
1259 if (st->codec->codec_id == AV_CODEC_ID_H264) {
1260 const uint8_t *p = buf, *buf_end = p + size;
1261 uint32_t state = -1;
1262 int ret = ff_check_h264_startcode(s, st, pkt);
1263 if (ret < 0)
1264 return ret;
1265
1266 do {
1267 p = avpriv_find_start_code(p, buf_end, &state);
1268 av_dlog(s, "nal %d\n", state & 0x1f);
1269 } while (p < buf_end && (state & 0x1f) != 9 &&
1270 (state & 0x1f) != 5 && (state & 0x1f) != 1);
1271
1272 if ((state & 0x1f) != 9) { // AUD NAL
1273 data = av_malloc(pkt->size + 6);
1274 if (!data)
1275 return AVERROR(ENOMEM);
1276 memcpy(data + 6, pkt->data, pkt->size);
1277 AV_WB32(data, 0x00000001);
1278 data[4] = 0x09;
1279 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
1280 buf = data;
1281 size = pkt->size + 6;
1282 }
1283 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {
1284 if (pkt->size < 2) {
1285 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
1286 return AVERROR_INVALIDDATA;
1287 }
1288 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
1289 int ret;
1290 AVPacket pkt2;
1291
1292 if (!ts_st->amux) {
1293 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
1294 "and extradata missing\n");
1295 return AVERROR_INVALIDDATA;
1296 }
1297
1298 av_init_packet(&pkt2);
1299 pkt2.data = pkt->data;
1300 pkt2.size = pkt->size;
1301 av_assert0(pkt->dts != AV_NOPTS_VALUE);
1302 pkt2.dts = av_rescale_q(pkt->dts, st->time_base, ts_st->amux->streams[0]->time_base);
1303
1304 ret = avio_open_dyn_buf(&ts_st->amux->pb);
1305 if (ret < 0)
1306 return AVERROR(ENOMEM);
1307
1308 ret = av_write_frame(ts_st->amux, &pkt2);
1309 if (ret < 0) {
1310 avio_close_dyn_buf(ts_st->amux->pb, &data);
1311 ts_st->amux->pb = NULL;
1312 av_free(data);
1313 return ret;
1314 }
1315 size = avio_close_dyn_buf(ts_st->amux->pb, &data);
1316 ts_st->amux->pb = NULL;
1317 buf = data;
1318 }
1319 } else if (st->codec->codec_id == AV_CODEC_ID_HEVC) {
1320 int ret = check_hevc_startcode(s, st, pkt);
1321 if (ret < 0)
1322 return ret;
1323 }
1324
1325 if (pkt->dts != AV_NOPTS_VALUE) {
1326 int i;
1327 for(i=0; i<s->nb_streams; i++) {
1328 AVStream *st2 = s->streams[i];
1329 MpegTSWriteStream *ts_st2 = st2->priv_data;
1330 if ( ts_st2->payload_size
1331 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)) {
1332 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,
1333 ts_st2->payload_pts, ts_st2->payload_dts,
1334 ts_st2->payload_flags & AV_PKT_FLAG_KEY);
1335 ts_st2->payload_size = 0;
1336 }
1337 }
1338 }
1339
1340 if (ts_st->payload_size && ts_st->payload_size + size > ts->pes_payload_size) {
1341 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1342 ts_st->payload_pts, ts_st->payload_dts,
1343 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1344 ts_st->payload_size = 0;
1345 }
1346
1347 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {
1348 av_assert0(!ts_st->payload_size);
1349 // for video and subtitle, write a single pes packet
1350 mpegts_write_pes(s, st, buf, size, pts, dts,
1351 pkt->flags & AV_PKT_FLAG_KEY);
1352 av_free(data);
1353 return 0;
1354 }
1355
1356 if (!ts_st->payload_size) {
1357 ts_st->payload_pts = pts;
1358 ts_st->payload_dts = dts;
1359 ts_st->payload_flags = pkt->flags;
1360 }
1361
1362 memcpy(ts_st->payload + ts_st->payload_size, buf, size);
1363 ts_st->payload_size += size;
1364
1365 av_free(data);
1366
1367 return 0;
1368}
1369
1370static void mpegts_write_flush(AVFormatContext *s)
1371{
1372 int i;
1373
1374 /* flush current packets */
1375 for (i = 0; i < s->nb_streams; i++) {
1376 AVStream *st = s->streams[i];
1377 MpegTSWriteStream *ts_st = st->priv_data;
1378 if (ts_st->payload_size > 0) {
1379 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
1380 ts_st->payload_pts, ts_st->payload_dts,
1381 ts_st->payload_flags & AV_PKT_FLAG_KEY);
1382 ts_st->payload_size = 0;
1383 }
1384 }
1385}
1386
1387static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
1388{
1389 if (!pkt) {
1390 mpegts_write_flush(s);
1391 return 1;
1392 } else {
1393 return mpegts_write_packet_internal(s, pkt);
1394 }
1395}
1396
1397static int mpegts_write_end(AVFormatContext *s)
1398{
1399 MpegTSWrite *ts = s->priv_data;
1400 MpegTSService *service;
1401 int i;
1402
1403 mpegts_write_flush(s);
1404
1405 for (i = 0; i < s->nb_streams; i++) {
1406 AVStream *st = s->streams[i];
1407 MpegTSWriteStream *ts_st = st->priv_data;
1408 av_freep(&ts_st->payload);
1409 if (ts_st->amux) {
1410 avformat_free_context(ts_st->amux);
1411 ts_st->amux = NULL;
1412 }
1413 }
1414
1415 for (i = 0; i < ts->nb_services; i++) {
1416 service = ts->services[i];
1417 av_freep(&service->provider_name);
1418 av_freep(&service->name);
1419 av_free(service);
1420 }
1421 av_free(ts->services);
1422
1423 return 0;
1424}
1425
1426static const AVOption options[] = {
1427 { "mpegts_transport_stream_id", "Set transport_stream_id field.",
1428 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
1429 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1430 { "mpegts_original_network_id", "Set original_network_id field.",
1431 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
1432 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1433 { "mpegts_service_id", "Set service_id field.",
1434 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
1435 { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
1436 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
1437 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
1438 { .i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
1439 { "mpegts_start_pid", "Set the first pid.",
1440 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
f6fa7814 1441 { .i64 = 0x0100 }, 0x0020, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
2ba45a60
DM		 1442 { "mpegts_m2ts_mode", "Enable m2ts mode.",
1443 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT,
1444 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1445 { "muxrate", NULL,
1446 offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
1447 { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1448 { "pes_payload_size", "Minimum PES packet payload in bytes",
1449 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
1450 { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1451 { "mpegts_flags", "MPEG-TS muxing flags",
1452 offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
1453 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1454 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1455 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
1456 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1457 { "latm", "Use LATM packetization for AAC",
1458 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
1459 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
1460 // backward compatibility
1461 { "resend_headers", "Reemit PAT/PMT before writing the next packet",
1462 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
1463 { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1464 { "mpegts_copyts", "don't offset dts/pts",
1465 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_INT,
1466 { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM },
1467 { "tables_version", "set PAT, PMT and SDT version",
1468 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT,
1469 { .i64 = 0 }, 0, 31, AV_OPT_FLAG_ENCODING_PARAM },
1470 { "omit_video_pes_length", "Omit the PES packet length for video packets",
1471 offsetof(MpegTSWrite, omit_video_pes_length), AV_OPT_TYPE_INT,
1472 { .i64 = 1 }, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
1473 { "pcr_period", "PCR retransmission time",
1474 offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
1475 { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1476 { NULL },
1477};
1478
1479static const AVClass mpegts_muxer_class = {
1480 .class_name = "MPEGTS muxer",
1481 .item_name = av_default_item_name,
1482 .option = options,
1483 .version = LIBAVUTIL_VERSION_INT,
1484};
1485
1486AVOutputFormat ff_mpegts_muxer = {
1487 .name = "mpegts",
1488 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
1489 .mime_type = "video/MP2T",
1490 .extensions = "ts,m2t,m2ts,mts",
1491 .priv_data_size = sizeof(MpegTSWrite),
1492 .audio_codec = AV_CODEC_ID_MP2,
1493 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1494 .write_header = mpegts_write_header,
1495 .write_packet = mpegts_write_packet,
1496 .write_trailer = mpegts_write_end,
1497 .flags = AVFMT_ALLOW_FLUSH,
1498 .priv_class = &mpegts_muxer_class,
1499};
ffmpeg Piment Noir Debian package repository