FFmpeg: libavformat/mpegtsenc.c Source File

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libavformat

mpegtsenc.c

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1 /*

2 * MPEG2 transport stream (aka DVB) muxer

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 */

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"

34 #define PCR_TIME_BASE 27000000

36 /* write DVB SI sections */

38 /*********************************************/

39 /* mpegts section writer */

41 typedef struct MpegTSSection {

42 int pid;

43 int cc;

44 void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);

45 void *opaque;

46 } MpegTSSection;

48 typedef struct MpegTSService {

49 MpegTSSection pmt; /* MPEG2 pmt table context */

50 int sid; /* service ID */

51 char *name;

52 char *provider_name;

53 int pcr_pid;

54 int pcr_packet_count;

55 int pcr_packet_period;

56 } MpegTSService;

58 typedef struct MpegTSWrite {

59 const AVClass *av_class;

60 MpegTSSection pat; /* MPEG2 pat table */

61 MpegTSSection sdt; /* MPEG2 sdt table context */

62 MpegTSService **services;

63 int sdt_packet_count;

64 int sdt_packet_period;

65 int pat_packet_count;

66 int pat_packet_period;

67 int nb_services;

68 int onid;

69 int tsid;

70 int64_t first_pcr;

71 int mux_rate; ///< set to 1 when VBR

72 int pes_payload_size;

74 int transport_stream_id;

75 int original_network_id;

76 int service_id;

78 int pmt_start_pid;

79 int start_pid;

80 int m2ts_mode;

82 int reemit_pat_pmt; // backward compatibility

84 #define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01

85 #define MPEGTS_FLAG_AAC_LATM 0x02

86 int flags;

87 int copyts;

88 } MpegTSWrite;

90 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */

91 #define DEFAULT_PES_HEADER_FREQ 16

92 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)

94 static const AVOption options[] = {

95 { "mpegts_transport_stream_id", "Set transport_stream_id field.",

96 offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},

97 { "mpegts_original_network_id", "Set original_network_id field.",

98 offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},

99 { "mpegts_service_id", "Set service_id field.",

100 offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT, {.i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},

101 { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",

102 offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT, {.i64 = 0x1000 }, 0x0010, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},

103 { "mpegts_start_pid", "Set the first pid.",

104 offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT, {.i64 = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},

105 {"mpegts_m2ts_mode", "Enable m2ts mode.",

106 offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT, {.i64 = -1 },

107 -1,1, AV_OPT_FLAG_ENCODING_PARAM},

108 { "muxrate", NULL, offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},

109 { "pes_payload_size", "Minimum PES packet payload in bytes",

110 offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT, {.i64 = DEFAULT_PES_PAYLOAD_SIZE}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},

111 { "mpegts_flags", "MPEG-TS muxing flags", offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX,

112 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },

113 { "resend_headers", "Reemit PAT/PMT before writing the next packet",

114 0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_REEMIT_PAT_PMT}, 0, INT_MAX,

115 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},

116 { "latm", "Use LATM packetization for AAC",

117 0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_AAC_LATM}, 0, INT_MAX,

118 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},

119 // backward compatibility

120 { "resend_headers", "Reemit PAT/PMT before writing the next packet",

121 offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},

122 { "mpegts_copyts", "don't offset dts/pts",

123 offsetof(MpegTSWrite, copyts), AV_OPT_TYPE_INT, {.i64=-1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},

124 { NULL },

125 };

126

127 static const AVClass mpegts_muxer_class = {

128 .class_name = "MPEGTS muxer",

129 .item_name = av_default_item_name,

130 .option = options,

131 .version = LIBAVUTIL_VERSION_INT,

132 };

133

134 /* NOTE: 4 bytes must be left at the end for the crc32 */

135 static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)

136 {

137 unsigned int crc;

138 unsigned char packet[TS_PACKET_SIZE];

139 const unsigned char *buf_ptr;

140 unsigned char *q;

141 int first, b, len1, left;

142

143 crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1, buf, len - 4));

144 buf[len - 4] = (crc >> 24) & 0xff;

145 buf[len - 3] = (crc >> 16) & 0xff;

146 buf[len - 2] = (crc >> 8) & 0xff;

147 buf[len - 1] = (crc) & 0xff;

148

149 /* send each packet */

150 buf_ptr = buf;

151 while (len > 0) {

152 first = (buf == buf_ptr);

153 q = packet;

154 *q++ = 0x47;

155 b = (s->pid >> 8);

156 if (first)

157 b |= 0x40;

158 *q++ = b;

159 *q++ = s->pid;

160 s->cc = (s->cc + 1) & 0xf;

161 *q++ = 0x10 | s->cc;

162 if (first)

163 *q++ = 0; /* 0 offset */

164 len1 = TS_PACKET_SIZE - (q - packet);

165 if (len1 > len)

166 len1 = len;

167 memcpy(q, buf_ptr, len1);

168 q += len1;

169 /* add known padding data */

170 left = TS_PACKET_SIZE - (q - packet);

171 if (left > 0)

172 memset(q, 0xff, left);

173

174 s->write_packet(s, packet);

175

176 buf_ptr += len1;

177 len -= len1;

178 }

179 }

180

181 static inline void put16(uint8_t **q_ptr, int val)

182 {

183 uint8_t *q;

184 q = *q_ptr;

185 *q++ = val >> 8;

186 *q++ = val;

187 *q_ptr = q;

188 }

189

190 static int mpegts_write_section1(MpegTSSection *s, int tid, int id,

191 int version, int sec_num, int last_sec_num,

192 uint8_t *buf, int len)

193 {

194 uint8_t section[1024], *q;

195 unsigned int tot_len;

196 /* reserved_future_use field must be set to 1 for SDT */

197 unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;

198

199 tot_len = 3 + 5 + len + 4;

200 /* check if not too big */

201 if (tot_len > 1024)

202 return AVERROR_INVALIDDATA;

203

204 q = section;

205 *q++ = tid;

206 put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */

207 put16(&q, id);

208 *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */

209 *q++ = sec_num;

210 *q++ = last_sec_num;

211 memcpy(q, buf, len);

212

213 mpegts_write_section(s, section, tot_len);

214 return 0;

215 }

216

217 /*********************************************/

218 /* mpegts writer */

219

220 #define DEFAULT_PROVIDER_NAME "FFmpeg"

221 #define DEFAULT_SERVICE_NAME "Service01"

222

223 /* we retransmit the SI info at this rate */

224 #define SDT_RETRANS_TIME 500

225 #define PAT_RETRANS_TIME 100

226 #define PCR_RETRANS_TIME 20

227

228 typedef struct MpegTSWriteStream {

229 struct MpegTSService *service;

230 int pid; /* stream associated pid */

231 int cc;

232 int payload_size;

233 int first_pts_check; ///< first pts check needed

234 int prev_payload_key;

235 int64_t payload_pts;

236 int64_t payload_dts;

237 int payload_flags;

238 uint8_t *payload;

239 AVFormatContext *amux;

240 } MpegTSWriteStream;

241

242 static void mpegts_write_pat(AVFormatContext *s)

243 {

244 MpegTSWrite *ts = s->priv_data;

245 MpegTSService *service;

246 uint8_t data[1012], *q;

247 int i;

248

249 q = data;

250 for(i = 0; i < ts->nb_services; i++) {

251 service = ts->services[i];

252 put16(&q, service->sid);

253 put16(&q, 0xe000 | service->pmt.pid);

254 }

255 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,

256 data, q - data);

257 }

258

259 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)

260 {

261 MpegTSWrite *ts = s->priv_data;

262 uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;

263 int val, stream_type, i;

264

265 q = data;

266 put16(&q, 0xe000 | service->pcr_pid);

267

268 program_info_length_ptr = q;

269 q += 2; /* patched after */

270

271 /* put program info here */

272

273 val = 0xf000 | (q - program_info_length_ptr - 2);

274 program_info_length_ptr[0] = val >> 8;

275 program_info_length_ptr[1] = val;

276

277 for(i = 0; i < s->nb_streams; i++) {

278 AVStream *st = s->streams[i];

279 MpegTSWriteStream *ts_st = st->priv_data;

280 AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);

281 switch(st->codec->codec_id) {

282 case AV_CODEC_ID_MPEG1VIDEO:

283 case AV_CODEC_ID_MPEG2VIDEO:

284 stream_type = STREAM_TYPE_VIDEO_MPEG2;

285 break;

286 case AV_CODEC_ID_MPEG4:

287 stream_type = STREAM_TYPE_VIDEO_MPEG4;

288 break;

289 case AV_CODEC_ID_H264:

290 stream_type = STREAM_TYPE_VIDEO_H264;

291 break;

292 case AV_CODEC_ID_CAVS:

293 stream_type = STREAM_TYPE_VIDEO_CAVS;

294 break;

295 case AV_CODEC_ID_DIRAC:

296 stream_type = STREAM_TYPE_VIDEO_DIRAC;

297 break;

298 case AV_CODEC_ID_MP2:

299 case AV_CODEC_ID_MP3:

300 stream_type = STREAM_TYPE_AUDIO_MPEG1;

301 break;

302 case AV_CODEC_ID_AAC:

303 stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM) ? STREAM_TYPE_AUDIO_AAC_LATM : STREAM_TYPE_AUDIO_AAC;

304 break;

305 case AV_CODEC_ID_AAC_LATM:

306 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;

307 break;

308 case AV_CODEC_ID_AC3:

309 stream_type = STREAM_TYPE_AUDIO_AC3;

310 break;

311 default:

312 stream_type = STREAM_TYPE_PRIVATE_DATA;

313 break;

314 }

315 *q++ = stream_type;

316 put16(&q, 0xe000 | ts_st->pid);

317 desc_length_ptr = q;

318 q += 2; /* patched after */

319

320 /* write optional descriptors here */

321 switch(st->codec->codec_type) {

322 case AVMEDIA_TYPE_AUDIO:

323 if(st->codec->codec_id==AV_CODEC_ID_EAC3){

324 *q++=0x7a; // EAC3 descriptor see A038 DVB SI

325 *q++=1; // 1 byte, all flags sets to 0

326 *q++=0; // omit all fields...

327 }

328 if(st->codec->codec_id==AV_CODEC_ID_S302M){

329 *q++ = 0x05; /* MPEG-2 registration descriptor*/

330 *q++ = 4;

331 *q++ = 'B';

332 *q++ = 'S';

333 *q++ = 'S';

334 *q++ = 'D';

335 }

336

337 if (lang) {

338 char *p;

339 char *next = lang->value;

340 uint8_t *len_ptr;

341

342 *q++ = 0x0a; /* ISO 639 language descriptor */

343 len_ptr = q++;

344 *len_ptr = 0;

345

346 for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {

347 next = strchr(p, ',');

348 if (strlen(p) != 3 && (!next || next != p + 3))

349 continue; /* not a 3-letter code */

350

351 *q++ = *p++;

352 *q++ = *p++;

353 *q++ = *p++;

354

355 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)

356 *q++ = 0x01;

357 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)

358 *q++ = 0x02;

359 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)

360 *q++ = 0x03;

361 else

362 *q++ = 0; /* undefined type */

363

364 *len_ptr += 4;

365 }

366

367 if (*len_ptr == 0)

368 q -= 2; /* no language codes were written */

369 }

370 break;

371 case AVMEDIA_TYPE_SUBTITLE:

372 {

373 const char *language;

374 language = lang && strlen(lang->value)==3 ? lang->value : "eng";

375 *q++ = 0x59;

376 *q++ = 8;

377 *q++ = language[0];

378 *q++ = language[1];

379 *q++ = language[2];

380 *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */

381 if(st->codec->extradata_size == 4) {

382 memcpy(q, st->codec->extradata, 4);

383 q += 4;

384 } else {

385 put16(&q, 1); /* page id */

386 put16(&q, 1); /* ancillary page id */

387 }

388 }

389 break;

390 case AVMEDIA_TYPE_VIDEO:

391 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {

392 *q++ = 0x05; /*MPEG-2 registration descriptor*/

393 *q++ = 4;

394 *q++ = 'd';

395 *q++ = 'r';

396 *q++ = 'a';

397 *q++ = 'c';

398 }

399 break;

400 case AVMEDIA_TYPE_DATA:

401 if (st->codec->codec_id == AV_CODEC_ID_SMPTE_KLV) {

402 *q++ = 0x05; /* MPEG-2 registration descriptor */

403 *q++ = 4;

404 *q++ = 'K';

405 *q++ = 'L';

406 *q++ = 'V';

407 *q++ = 'A';

408 }

409 break;

410 }

411

412 val = 0xf000 | (q - desc_length_ptr - 2);

413 desc_length_ptr[0] = val >> 8;

414 desc_length_ptr[1] = val;

415 }

416 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,

417 data, q - data);

418 }

419

420 /* NOTE: str == NULL is accepted for an empty string */

421 static void putstr8(uint8_t **q_ptr, const char *str)

422 {

423 uint8_t *q;

424 int len;

425

426 q = *q_ptr;

427 if (!str)

428 len = 0;

429 else

430 len = strlen(str);

431 *q++ = len;

432 memcpy(q, str, len);

433 q += len;

434 *q_ptr = q;

435 }

436

437 static void mpegts_write_sdt(AVFormatContext *s)

438 {

439 MpegTSWrite *ts = s->priv_data;

440 MpegTSService *service;

441 uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;

442 int i, running_status, free_ca_mode, val;

443

444 q = data;

445 put16(&q, ts->onid);

446 *q++ = 0xff;

447 for(i = 0; i < ts->nb_services; i++) {

448 service = ts->services[i];

449 put16(&q, service->sid);

450 *q++ = 0xfc | 0x00; /* currently no EIT info */

451 desc_list_len_ptr = q;

452 q += 2;

453 running_status = 4; /* running */

454 free_ca_mode = 0;

455

456 /* write only one descriptor for the service name and provider */

457 *q++ = 0x48;

458 desc_len_ptr = q;

459 q++;

460 *q++ = 0x01; /* digital television service */

461 putstr8(&q, service->provider_name);

462 putstr8(&q, service->name);

463 desc_len_ptr[0] = q - desc_len_ptr - 1;

464

465 /* fill descriptor length */

466 val = (running_status << 13) | (free_ca_mode << 12) |

467 (q - desc_list_len_ptr - 2);

468 desc_list_len_ptr[0] = val >> 8;

469 desc_list_len_ptr[1] = val;

470 }

471 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,

472 data, q - data);

473 }

474

475 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,

476 int sid,

477 const char *provider_name,

478 const char *name)

479 {

480 MpegTSService *service;

481

482 service = av_mallocz(sizeof(MpegTSService));

483 if (!service)

484 return NULL;

485 service->pmt.pid = ts->pmt_start_pid + ts->nb_services;

486 service->sid = sid;

487 service->provider_name = av_strdup(provider_name);

488 service->name = av_strdup(name);

489 service->pcr_pid = 0x1fff;

490 dynarray_add(&ts->services, &ts->nb_services, service);

491 return service;

492 }

493

494 static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)

495 {

496 return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +

497 ts->first_pcr;

498 }

499

500 static void mpegts_prefix_m2ts_header(AVFormatContext *s)

501 {

502 MpegTSWrite *ts = s->priv_data;

503 if (ts->m2ts_mode) {

504 int64_t pcr = get_pcr(s->priv_data, s->pb);

505 uint32_t tp_extra_header = pcr % 0x3fffffff;

506 tp_extra_header = AV_RB32(&tp_extra_header);

507 avio_write(s->pb, (unsigned char *) &tp_extra_header,

508 sizeof(tp_extra_header));

509 }

510 }

511

512 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)

513 {

514 AVFormatContext *ctx = s->opaque;

515 mpegts_prefix_m2ts_header(ctx);

516 avio_write(ctx->pb, packet, TS_PACKET_SIZE);

517 }

518

519 static int mpegts_write_header(AVFormatContext *s)

520 {

521 MpegTSWrite *ts = s->priv_data;

522 MpegTSWriteStream *ts_st;

523 MpegTSService *service;

524 AVStream *st, *pcr_st = NULL;

525 AVDictionaryEntry *title, *provider;

526 int i, j;

527 const char *service_name;

528 const char *provider_name;

529 int *pids;

530 int ret;

531

532 if (s->max_delay < 0) /* Not set by the caller */

533 s->max_delay = 0;

534

535 // round up to a whole number of TS packets

536 ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;

537

538 ts->tsid = ts->transport_stream_id;

539 ts->onid = ts->original_network_id;

540 /* allocate a single DVB service */

541 title = av_dict_get(s->metadata, "service_name", NULL, 0);

542 if (!title)

543 title = av_dict_get(s->metadata, "title", NULL, 0);

544 service_name = title ? title->value : DEFAULT_SERVICE_NAME;

545 provider = av_dict_get(s->metadata, "service_provider", NULL, 0);

546 provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;

547 service = mpegts_add_service(ts, ts->service_id, provider_name, service_name);

548 service->pmt.write_packet = section_write_packet;

549 service->pmt.opaque = s;

550 service->pmt.cc = 15;

551

552 ts->pat.pid = PAT_PID;

553 ts->pat.cc = 15; // Initialize at 15 so that it wraps and be equal to 0 for the first packet we write

554 ts->pat.write_packet = section_write_packet;

555 ts->pat.opaque = s;

556

557 ts->sdt.pid = SDT_PID;

558 ts->sdt.cc = 15;

559 ts->sdt.write_packet = section_write_packet;

560 ts->sdt.opaque = s;

561

562 pids = av_malloc(s->nb_streams * sizeof(*pids));

563 if (!pids)

564 return AVERROR(ENOMEM);

565

566 /* assign pids to each stream */

567 for(i = 0;i < s->nb_streams; i++) {

568 st = s->streams[i];

569 avpriv_set_pts_info(st, 33, 1, 90000);

570 ts_st = av_mallocz(sizeof(MpegTSWriteStream));

571 if (!ts_st) {

572 ret = AVERROR(ENOMEM);

573 goto fail;

574 }

575 st->priv_data = ts_st;

576 ts_st->payload = av_mallocz(ts->pes_payload_size);

577 if (!ts_st->payload) {

578 ret = AVERROR(ENOMEM);

579 goto fail;

580 }

581 ts_st->service = service;

582 /* MPEG pid values < 16 are reserved. Applications which set st->id in

583 * this range are assigned a calculated pid. */

584 if (st->id < 16) {

585 ts_st->pid = ts->start_pid + i;

586 } else if (st->id < 0x1FFF) {

587 ts_st->pid = st->id;

588 } else {

589 av_log(s, AV_LOG_ERROR, "Invalid stream id %d, must be less than 8191\n", st->id);

590 ret = AVERROR(EINVAL);

591 goto fail;

592 }

593 if (ts_st->pid == service->pmt.pid) {

594 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);

595 ret = AVERROR(EINVAL);

596 goto fail;

597 }

598 for (j = 0; j < i; j++)

599 if (pids[j] == ts_st->pid) {

600 av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);

601 ret = AVERROR(EINVAL);

602 goto fail;

603 }

604 pids[i] = ts_st->pid;

605 ts_st->payload_pts = AV_NOPTS_VALUE;

606 ts_st->payload_dts = AV_NOPTS_VALUE;

607 ts_st->first_pts_check = 1;

608 ts_st->cc = 15;

609 /* update PCR pid by using the first video stream */

610 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&

611 service->pcr_pid == 0x1fff) {

612 service->pcr_pid = ts_st->pid;

613 pcr_st = st;

614 }

615 if (st->codec->codec_id == AV_CODEC_ID_AAC &&

616 st->codec->extradata_size > 0)

617 {

618 AVStream *ast;

619 ts_st->amux = avformat_alloc_context();

620 if (!ts_st->amux) {

621 ret = AVERROR(ENOMEM);

622 goto fail;

623 }

624 ts_st->amux->oformat = av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts", NULL, NULL);

625 if (!ts_st->amux->oformat) {

626 ret = AVERROR(EINVAL);

627 goto fail;

628 }

629 ast = avformat_new_stream(ts_st->amux, NULL);

630 ret = avcodec_copy_context(ast->codec, st->codec);

631 if (ret != 0)

632 goto fail;

633 ret = avformat_write_header(ts_st->amux, NULL);

634 if (ret < 0)

635 goto fail;

636 }

637 }

638

639 av_free(pids);

640

641 /* if no video stream, use the first stream as PCR */

642 if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {

643 pcr_st = s->streams[0];

644 ts_st = pcr_st->priv_data;

645 service->pcr_pid = ts_st->pid;

646 }

647

648 if (ts->mux_rate > 1) {

649 service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) /

650 (TS_PACKET_SIZE * 8 * 1000);

651 ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /

652 (TS_PACKET_SIZE * 8 * 1000);

653 ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /

654 (TS_PACKET_SIZE * 8 * 1000);

655

656 if(ts->copyts < 1)

657 ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);

658 } else {

659 /* Arbitrary values, PAT/PMT will also be written on video key frames */

660 ts->sdt_packet_period = 200;

661 ts->pat_packet_period = 40;

662 if (pcr_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {

663 if (!pcr_st->codec->frame_size) {

664 av_log(s, AV_LOG_WARNING, "frame size not set\n");

665 service->pcr_packet_period =

666 pcr_st->codec->sample_rate/(10*512);

667 } else {

668 service->pcr_packet_period =

669 pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size);

670 }

671 } else {

672 // max delta PCR 0.1s

673 service->pcr_packet_period =

674 pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.num);

675 }

676 if(!service->pcr_packet_period)

677 service->pcr_packet_period = 1;

678 }

679

680 // output a PCR as soon as possible

681 service->pcr_packet_count = service->pcr_packet_period;

682 ts->pat_packet_count = ts->pat_packet_period-1;

683 ts->sdt_packet_count = ts->sdt_packet_period-1;

684

685 if (ts->mux_rate == 1)

686 av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");

687 else

688 av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);

689 av_log(s, AV_LOG_VERBOSE, "pcr every %d pkts, "

690 "sdt every %d, pat/pmt every %d pkts\n",

691 service->pcr_packet_period,

692 ts->sdt_packet_period, ts->pat_packet_period);

693

694 if (ts->m2ts_mode == -1) {

695 if (av_match_ext(s->filename, "m2ts")) {

696 ts->m2ts_mode = 1;

697 } else {

698 ts->m2ts_mode = 0;

699 }

700 }

701

702 avio_flush(s->pb);

703

704 return 0;

705

706 fail:

707 av_free(pids);

708 for(i = 0;i < s->nb_streams; i++) {

709 MpegTSWriteStream *ts_st;

710 st = s->streams[i];

711 ts_st = st->priv_data;

712 if (ts_st) {

713 av_freep(&ts_st->payload);

714 if (ts_st->amux) {

715 avformat_free_context(ts_st->amux);

716 ts_st->amux = NULL;

717 }

718 }

719 av_freep(&st->priv_data);

720 }

721 return ret;

722 }

723

724 /* send SDT, PAT and PMT tables regulary */

725 static void retransmit_si_info(AVFormatContext *s, int force_pat)

726 {

727 MpegTSWrite *ts = s->priv_data;

728 int i;

729

730 if (++ts->sdt_packet_count == ts->sdt_packet_period) {

731 ts->sdt_packet_count = 0;

732 mpegts_write_sdt(s);

733 }

734 if (++ts->pat_packet_count == ts->pat_packet_period || force_pat) {

735 ts->pat_packet_count = 0;

736 mpegts_write_pat(s);

737 for(i = 0; i < ts->nb_services; i++) {

738 mpegts_write_pmt(s, ts->services[i]);

739 }

740 }

741 }

742

743 static int write_pcr_bits(uint8_t *buf, int64_t pcr)

744 {

745 int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;

746

747 *buf++ = pcr_high >> 25;

748 *buf++ = pcr_high >> 17;

749 *buf++ = pcr_high >> 9;

750 *buf++ = pcr_high >> 1;

751 *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;

752 *buf++ = pcr_low;

753

754 return 6;

755 }

756

757 /* Write a single null transport stream packet */

758 static void mpegts_insert_null_packet(AVFormatContext *s)

759 {

760 uint8_t *q;

761 uint8_t buf[TS_PACKET_SIZE];

762

763 q = buf;

764 *q++ = 0x47;

765 *q++ = 0x00 | 0x1f;

766 *q++ = 0xff;

767 *q++ = 0x10;

768 memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));

769 mpegts_prefix_m2ts_header(s);

770 avio_write(s->pb, buf, TS_PACKET_SIZE);

771 }

772

773 /* Write a single transport stream packet with a PCR and no payload */

774 static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)

775 {

776 MpegTSWrite *ts = s->priv_data;

777 MpegTSWriteStream *ts_st = st->priv_data;

778 uint8_t *q;

779 uint8_t buf[TS_PACKET_SIZE];

780

781 q = buf;

782 *q++ = 0x47;

783 *q++ = ts_st->pid >> 8;

784 *q++ = ts_st->pid;

785 *q++ = 0x20 | ts_st->cc; /* Adaptation only */

786 /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */

787 *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */

788 *q++ = 0x10; /* Adaptation flags: PCR present */

789

790 /* PCR coded into 6 bytes */

791 q += write_pcr_bits(q, get_pcr(ts, s->pb));

792

793 /* stuffing bytes */

794 memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));

795 mpegts_prefix_m2ts_header(s);

796 avio_write(s->pb, buf, TS_PACKET_SIZE);

797 }

798

799 static void write_pts(uint8_t *q, int fourbits, int64_t pts)

800 {

801 int val;

802

803 val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;

804 *q++ = val;

805 val = (((pts >> 15) & 0x7fff) << 1) | 1;

806 *q++ = val >> 8;

807 *q++ = val;

808 val = (((pts) & 0x7fff) << 1) | 1;

809 *q++ = val >> 8;

810 *q++ = val;

811 }

812

813 /* Set an adaptation field flag in an MPEG-TS packet*/

814 static void set_af_flag(uint8_t *pkt, int flag)

815 {

816 // expect at least one flag to set

817 av_assert0(flag);

818

819 if ((pkt[3] & 0x20) == 0) {

820 // no AF yet, set adaptation field flag

821 pkt[3] |= 0x20;

822 // 1 byte length, no flags

823 pkt[4] = 1;

824 pkt[5] = 0;

825 }

826 pkt[5] |= flag;

827 }

828

829 /* Extend the adaptation field by size bytes */

830 static void extend_af(uint8_t *pkt, int size)

831 {

832 // expect already existing adaptation field

833 av_assert0(pkt[3] & 0x20);

834 pkt[4] += size;

835 }

836

837 /* Get a pointer to MPEG-TS payload (right after TS packet header) */

838 static uint8_t *get_ts_payload_start(uint8_t *pkt)

839 {

840 if (pkt[3] & 0x20)

841 return pkt + 5 + pkt[4];

842 else

843 return pkt + 4;

844 }

845

846 /* Add a pes header to the front of payload, and segment into an integer number of

847 * ts packets. The final ts packet is padded using an over-sized adaptation header

848 * to exactly fill the last ts packet.

849 * NOTE: 'payload' contains a complete PES payload.

850 */

851 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,

852 const uint8_t *payload, int payload_size,

853 int64_t pts, int64_t dts, int key)

854 {

855 MpegTSWriteStream *ts_st = st->priv_data;

856 MpegTSWrite *ts = s->priv_data;

857 uint8_t buf[TS_PACKET_SIZE];

858 uint8_t *q;

859 int val, is_start, len, header_len, write_pcr, private_code, flags;

860 int afc_len, stuffing_len;

861 int64_t pcr = -1; /* avoid warning */

862 int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);

863 int force_pat = st->codec->codec_type == AVMEDIA_TYPE_VIDEO && key && !ts_st->prev_payload_key;

864

865 is_start = 1;

866 while (payload_size > 0) {

867 retransmit_si_info(s, force_pat);

868 force_pat = 0;

869

870 write_pcr = 0;

871 if (ts_st->pid == ts_st->service->pcr_pid) {

872 if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames

873 ts_st->service->pcr_packet_count++;

874 if (ts_st->service->pcr_packet_count >=

875 ts_st->service->pcr_packet_period) {

876 ts_st->service->pcr_packet_count = 0;

877 write_pcr = 1;

878 }

879 }

880

881 if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&

882 (dts - get_pcr(ts, s->pb)/300) > delay) {

883 /* pcr insert gets priority over null packet insert */

884 if (write_pcr)

885 mpegts_insert_pcr_only(s, st);

886 else

887 mpegts_insert_null_packet(s);

888 continue; /* recalculate write_pcr and possibly retransmit si_info */

889 }

890

891 /* prepare packet header */

892 q = buf;

893 *q++ = 0x47;

894 val = (ts_st->pid >> 8);

895 if (is_start)

896 val |= 0x40;

897 *q++ = val;

898 *q++ = ts_st->pid;

899 ts_st->cc = (ts_st->cc + 1) & 0xf;

900 *q++ = 0x10 | ts_st->cc; // payload indicator + CC

901 if (key && is_start && pts != AV_NOPTS_VALUE) {

902 // set Random Access for key frames

903 if (ts_st->pid == ts_st->service->pcr_pid)

904 write_pcr = 1;

905 set_af_flag(buf, 0x40);

906 q = get_ts_payload_start(buf);

907 }

908 if (write_pcr) {

909 set_af_flag(buf, 0x10);

910 q = get_ts_payload_start(buf);

911 // add 11, pcr references the last byte of program clock reference base

912 if (ts->mux_rate > 1)

913 pcr = get_pcr(ts, s->pb);

914 else

915 pcr = (dts - delay)*300;

916 if (dts != AV_NOPTS_VALUE && dts < pcr / 300)

917 av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");

918 extend_af(buf, write_pcr_bits(q, pcr));

919 q = get_ts_payload_start(buf);

920 }

921 if (is_start) {

922 int pes_extension = 0;

923 /* write PES header */

924 *q++ = 0x00;

925 *q++ = 0x00;

926 *q++ = 0x01;

927 private_code = 0;

928 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {

929 if (st->codec->codec_id == AV_CODEC_ID_DIRAC) {

930 *q++ = 0xfd;

931 } else

932 *q++ = 0xe0;

933 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&

934 (st->codec->codec_id == AV_CODEC_ID_MP2 ||

935 st->codec->codec_id == AV_CODEC_ID_MP3 ||

936 st->codec->codec_id == AV_CODEC_ID_AAC)) {

937 *q++ = 0xc0;

938 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&

939 st->codec->codec_id == AV_CODEC_ID_AC3 &&

940 ts->m2ts_mode) {

941 *q++ = 0xfd;

942 } else {

943 *q++ = 0xbd;

944 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {

945 private_code = 0x20;

946 }

947 }

948 header_len = 0;

949 flags = 0;

950 if (pts != AV_NOPTS_VALUE) {

951 header_len += 5;

952 flags |= 0x80;

953 }

954 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {

955 header_len += 5;

956 flags |= 0x40;

957 }

958 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&

959 st->codec->codec_id == AV_CODEC_ID_DIRAC) {

960 /* set PES_extension_flag */

961 pes_extension = 1;

962 flags |= 0x01;

963

964 /*

965 * One byte for PES2 extension flag +

966 * one byte for extension length +

967 * one byte for extension id

968 */

969 header_len += 3;

970 }

971 /* for Blu-ray AC3 Audio the PES Extension flag should be as follow

972 * otherwise it will not play sound on blu-ray

973 */

974 if (ts->m2ts_mode &&

975 st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&

976 st->codec->codec_id == AV_CODEC_ID_AC3) {

977 /* set PES_extension_flag */

978 pes_extension = 1;

979 flags |= 0x01;

980 header_len += 3;

981 }

982 len = payload_size + header_len + 3;

983 if (private_code != 0)

984 len++;

985 if (len > 0xffff)

986 len = 0;

987 *q++ = len >> 8;

988 *q++ = len;

989 val = 0x80;

990 /* data alignment indicator is required for subtitle and data streams */

991 if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA)

992 val |= 0x04;

993 *q++ = val;

994 *q++ = flags;

995 *q++ = header_len;

996 if (pts != AV_NOPTS_VALUE) {

997 write_pts(q, flags >> 6, pts);

998 q += 5;

999 }

1000 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {

1001 write_pts(q, 1, dts);

1002 q += 5;

1003 }

1004 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {

1005 flags = 0x01; /* set PES_extension_flag_2 */

1006 *q++ = flags;

1007 *q++ = 0x80 | 0x01; /* marker bit + extension length */

1008 /*

1009 * Set the stream id extension flag bit to 0 and

1010 * write the extended stream id

1011 */

1012 *q++ = 0x00 | 0x60;

1013 }

1014 /* For Blu-ray AC3 Audio Setting extended flags */

1015 if (ts->m2ts_mode &&

1016 pes_extension &&

1017 st->codec->codec_id == AV_CODEC_ID_AC3) {

1018 flags = 0x01; /* set PES_extension_flag_2 */

1019 *q++ = flags;

1020 *q++ = 0x80 | 0x01; /* marker bit + extension length */

1021 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */

1022 }

1023

1024

1025 if (private_code != 0)

1026 *q++ = private_code;

1027 is_start = 0;

1028 }

1029 /* header size */

1030 header_len = q - buf;

1031 /* data len */

1032 len = TS_PACKET_SIZE - header_len;

1033 if (len > payload_size)

1034 len = payload_size;

1035 stuffing_len = TS_PACKET_SIZE - header_len - len;

1036 if (stuffing_len > 0) {

1037 /* add stuffing with AFC */

1038 if (buf[3] & 0x20) {

1039 /* stuffing already present: increase its size */

1040 afc_len = buf[4] + 1;

1041 memmove(buf + 4 + afc_len + stuffing_len,

1042 buf + 4 + afc_len,

1043 header_len - (4 + afc_len));

1044 buf[4] += stuffing_len;

1045 memset(buf + 4 + afc_len, 0xff, stuffing_len);

1046 } else {

1047 /* add stuffing */

1048 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);

1049 buf[3] |= 0x20;

1050 buf[4] = stuffing_len - 1;

1051 if (stuffing_len >= 2) {

1052 buf[5] = 0x00;

1053 memset(buf + 6, 0xff, stuffing_len - 2);

1054 }

1055 }

1056 }

1057 memcpy(buf + TS_PACKET_SIZE - len, payload, len);

1058 payload += len;

1059 payload_size -= len;

1060 mpegts_prefix_m2ts_header(s);

1061 avio_write(s->pb, buf, TS_PACKET_SIZE);

1062 }

1063 avio_flush(s->pb);

1064 ts_st->prev_payload_key = key;

1065 }

1066

1067 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)

1068 {

1069 AVStream *st = s->streams[pkt->stream_index];

1070 int size = pkt->size;

1071 uint8_t *buf= pkt->data;

1072 uint8_t *data= NULL;

1073 MpegTSWrite *ts = s->priv_data;

1074 MpegTSWriteStream *ts_st = st->priv_data;

1075 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;

1076 int64_t dts = pkt->dts, pts = pkt->pts;

1077

1078 if (ts->reemit_pat_pmt) {

1079 av_log(s, AV_LOG_WARNING, "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");

1080 ts->reemit_pat_pmt = 0;

1081 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;

1082 }

1083

1084 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {

1085 ts->pat_packet_count = ts->pat_packet_period - 1;

1086 ts->sdt_packet_count = ts->sdt_packet_period - 1;

1087 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;

1088 }

1089

1090 if(ts->copyts < 1){

1091 if (pts != AV_NOPTS_VALUE)

1092 pts += delay;

1093 if (dts != AV_NOPTS_VALUE)

1094 dts += delay;

1095 }

1096

1097 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {

1098 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");

1099 return AVERROR_INVALIDDATA;

1100 }

1101 ts_st->first_pts_check = 0;

1102

1103 if (st->codec->codec_id == AV_CODEC_ID_H264) {

1104 const uint8_t *p = buf, *buf_end = p+size;

1105 uint32_t state = -1;

1106

1107 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {

1108 if (!st->nb_frames) {

1109 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "

1110 "no startcode found, use the h264_mp4toannexb bitstream filter (-bsf h264_mp4toannexb)\n");

1111 return AVERROR(EINVAL);

1112 }

1113 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing\n");

1114 }

1115

1116 do {

1117 p = avpriv_find_start_code(p, buf_end, &state);

1118 av_dlog(s, "nal %d\n", state & 0x1f);

1119 } while (p < buf_end && (state & 0x1f) != 9 &&

1120 (state & 0x1f) != 5 && (state & 0x1f) != 1);

1121

1122 if ((state & 0x1f) != 9) { // AUD NAL

1123 data = av_malloc(pkt->size+6);

1124 if (!data)

1125 return AVERROR(ENOMEM);

1126 memcpy(data+6, pkt->data, pkt->size);

1127 AV_WB32(data, 0x00000001);

1128 data[4] = 0x09;

1129 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit

1130 buf = data;

1131 size = pkt->size+6;

1132 }

1133 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {

1134 if (pkt->size < 2) {

1135 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");

1136 return AVERROR_INVALIDDATA;

1137 }

1138 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {

1139 int ret;

1140 AVPacket pkt2;

1141

1142 if (!ts_st->amux) {

1143 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "

1144 "and extradata missing\n");

1145 return AVERROR_INVALIDDATA;

1146 }

1147

1148 av_init_packet(&pkt2);

1149 pkt2.data = pkt->data;

1150 pkt2.size = pkt->size;

1151 ret = avio_open_dyn_buf(&ts_st->amux->pb);

1152 if (ret < 0)

1153 return AVERROR(ENOMEM);

1154

1155 ret = av_write_frame(ts_st->amux, &pkt2);

1156 if (ret < 0) {

1157 avio_close_dyn_buf(ts_st->amux->pb, &data);

1158 ts_st->amux->pb = NULL;

1159 av_free(data);

1160 return ret;

1161 }

1162 size = avio_close_dyn_buf(ts_st->amux->pb, &data);

1163 ts_st->amux->pb = NULL;

1164 buf = data;

1165 }

1166 }

1167

1168 if (pkt->dts != AV_NOPTS_VALUE) {

1169 int i;

1170 for(i=0; i<s->nb_streams; i++){

1171 AVStream *st2 = s->streams[i];

1172 MpegTSWriteStream *ts_st2 = st2->priv_data;

1173 if( ts_st2->payload_size

1174 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)){

1175 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,

1176 ts_st2->payload_pts, ts_st2->payload_dts,

1177 ts_st2->payload_flags & AV_PKT_FLAG_KEY);

1178 ts_st2->payload_size = 0;

1179 }

1180 }

1181 }

1182

1183 if (ts_st->payload_size && ts_st->payload_size + size > ts->pes_payload_size) {

1184 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,

1185 ts_st->payload_pts, ts_st->payload_dts,

1186 ts_st->payload_flags & AV_PKT_FLAG_KEY);

1187 ts_st->payload_size = 0;

1188 }

1189

1190 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {

1191 av_assert0(!ts_st->payload_size);

1192 // for video and subtitle, write a single pes packet

1193 mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);

1194 av_free(data);

1195 return 0;

1196 }

1197

1198 if (!ts_st->payload_size) {

1199 ts_st->payload_pts = pts;

1200 ts_st->payload_dts = dts;

1201 ts_st->payload_flags = pkt->flags;

1202 }

1203

1204 memcpy(ts_st->payload + ts_st->payload_size, buf, size);

1205 ts_st->payload_size += size;

1206

1207 av_free(data);

1208

1209 return 0;

1210 }

1211

1212 static void mpegts_write_flush(AVFormatContext *s)

1213 {

1214 int i;

1215

1216 /* flush current packets */

1217 for(i = 0; i < s->nb_streams; i++) {

1218 AVStream *st = s->streams[i];

1219 MpegTSWriteStream *ts_st = st->priv_data;

1220 if (ts_st->payload_size > 0) {

1221 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,

1222 ts_st->payload_pts, ts_st->payload_dts,

1223 ts_st->payload_flags & AV_PKT_FLAG_KEY);

1224 ts_st->payload_size = 0;

1225 }

1226 }

1227 avio_flush(s->pb);

1228 }

1229

1230 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)

1231 {

1232 if (!pkt) {

1233 mpegts_write_flush(s);

1234 return 1;

1235 } else {

1236 return mpegts_write_packet_internal(s, pkt);

1237 }

1238 }

1239

1240 static int mpegts_write_end(AVFormatContext *s)

1241 {

1242 MpegTSWrite *ts = s->priv_data;

1243 MpegTSService *service;

1244 int i;

1245

1246 mpegts_write_flush(s);

1247

1248 for(i = 0; i < s->nb_streams; i++) {

1249 AVStream *st = s->streams[i];

1250 MpegTSWriteStream *ts_st = st->priv_data;

1251 av_freep(&ts_st->payload);

1252 if (ts_st->amux) {

1253 avformat_free_context(ts_st->amux);

1254 ts_st->amux = NULL;

1255 }

1256 }

1257

1258 for(i = 0; i < ts->nb_services; i++) {

1259 service = ts->services[i];

1260 av_freep(&service->provider_name);

1261 av_freep(&service->name);

1262 av_free(service);

1263 }

1264 av_free(ts->services);

1265

1266 return 0;

1267 }

1268

1269 AVOutputFormat ff_mpegts_muxer = {

1270 .name = "mpegts",

1271 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),

1272 .mime_type = "video/x-mpegts",

1273 .extensions = "ts,m2t,m2ts,mts",

1274 .priv_data_size = sizeof(MpegTSWrite),

1275 .audio_codec = AV_CODEC_ID_MP2,

1276 .video_codec = AV_CODEC_ID_MPEG2VIDEO,

1277 .write_header = mpegts_write_header,

1278 .write_packet = mpegts_write_packet,

1279 .write_trailer = mpegts_write_end,

1280 .flags = AVFMT_ALLOW_FLUSH,

1281 .priv_class = &mpegts_muxer_class,

1282 };

Generated on Wed Jul 10 2013 23:48:13 for FFmpeg by doxygen 1.8.2