Ticket #2828: mpegtsenc.c

File mpegtsenc.c, 42.4 KB (added by dlevinson5, 13 years ago)

modified mpegtsenc.c file

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