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 int tables_version;

89 } MpegTSWrite;

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

92 #define DEFAULT_PES_HEADER_FREQ 16

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

95 static const AVOption options[] = {

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

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

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

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

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

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

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

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

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

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

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

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

108 -1,1, AV_OPT_FLAG_ENCODING_PARAM},

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

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

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

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

113 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },

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

115 0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_REEMIT_PAT_PMT}, 0, INT_MAX,

116 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},

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

118 0, AV_OPT_TYPE_CONST, {.i64 = MPEGTS_FLAG_AAC_LATM}, 0, INT_MAX,

119 AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags"},

120 // backward compatibility

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

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

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

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

125 { "tables_version", "set PAT, PMT and SDT version",

126 offsetof(MpegTSWrite, tables_version), AV_OPT_TYPE_INT, {.i64=0}, 0, 31, AV_OPT_FLAG_ENCODING_PARAM},

127 { NULL },

128 };

129

130 static const AVClass mpegts_muxer_class = {

131 .class_name = "MPEGTS muxer",

132 .item_name = av_default_item_name,

133 .option = options,

134 .version = LIBAVUTIL_VERSION_INT,

135 };

136

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

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

139 {

140 unsigned int crc;

141 unsigned char packet[TS_PACKET_SIZE];

142 const unsigned char *buf_ptr;

143 unsigned char *q;

144 int first, b, len1, left;

145

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

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

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

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

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

151

152 /* send each packet */

153 buf_ptr = buf;

154 while (len > 0) {

155 first = (buf == buf_ptr);

156 q = packet;

157 *q++ = 0x47;

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

159 if (first)

160 b |= 0x40;

161 *q++ = b;

162 *q++ = s->pid;

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

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

165 if (first)

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

167 len1 = TS_PACKET_SIZE - (q - packet);

168 if (len1 > len)

169 len1 = len;

170 memcpy(q, buf_ptr, len1);

171 q += len1;

172 /* add known padding data */

173 left = TS_PACKET_SIZE - (q - packet);

174 if (left > 0)

175 memset(q, 0xff, left);

176

177 s->write_packet(s, packet);

178

179 buf_ptr += len1;

180 len -= len1;

181 }

182 }

183

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

185 {

186 uint8_t *q;

187 q = *q_ptr;

188 *q++ = val >> 8;

189 *q++ = val;

190 *q_ptr = q;

191 }

192

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

194 int version, int sec_num, int last_sec_num,

195 uint8_t *buf, int len)

196 {

197 uint8_t section[1024], *q;

198 unsigned int tot_len;

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

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

201

202 tot_len = 3 + 5 + len + 4;

203 /* check if not too big */

204 if (tot_len > 1024)

205 return AVERROR_INVALIDDATA;

206

207 q = section;

208 *q++ = tid;

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

210 put16(&q, id);

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

212 *q++ = sec_num;

213 *q++ = last_sec_num;

214 memcpy(q, buf, len);

215

216 mpegts_write_section(s, section, tot_len);

217 return 0;

218 }

219

220 /*********************************************/

221 /* mpegts writer */

222

223 #define DEFAULT_PROVIDER_NAME "FFmpeg"

224 #define DEFAULT_SERVICE_NAME "Service01"

225

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

227 #define SDT_RETRANS_TIME 500

228 #define PAT_RETRANS_TIME 100

229 #define PCR_RETRANS_TIME 20

230

231 typedef struct MpegTSWriteStream {

232 struct MpegTSService *service;

233 int pid; /* stream associated pid */

234 int cc;

235 int payload_size;

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

237 int prev_payload_key;

238 int64_t payload_pts;

239 int64_t payload_dts;

240 int payload_flags;

241 uint8_t *payload;

242 AVFormatContext *amux;

243 } MpegTSWriteStream;

244

245 static void mpegts_write_pat(AVFormatContext *s)

246 {

247 MpegTSWrite *ts = s->priv_data;

248 MpegTSService *service;

249 uint8_t data[1012], *q;

250 int i;

251

252 q = data;

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

254 service = ts->services[i];

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

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

257 }

258 mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, ts->tables_version, 0, 0,

259 data, q - data);

260 }

261

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

263 {

264 MpegTSWrite *ts = s->priv_data;

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

266 int val, stream_type, i;

267

268 q = data;

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

270

271 program_info_length_ptr = q;

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

273

274 /* put program info here */

275

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

277 program_info_length_ptr[0] = val >> 8;

278 program_info_length_ptr[1] = val;

279

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

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

282 MpegTSWriteStream *ts_st = st->priv_data;

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

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

285 case AV_CODEC_ID_MPEG1VIDEO:

286 case AV_CODEC_ID_MPEG2VIDEO:

287 stream_type = STREAM_TYPE_VIDEO_MPEG2;

288 break;

289 case AV_CODEC_ID_MPEG4:

290 stream_type = STREAM_TYPE_VIDEO_MPEG4;

291 break;

292 case AV_CODEC_ID_H264:

293 stream_type = STREAM_TYPE_VIDEO_H264;

294 break;

295 case AV_CODEC_ID_CAVS:

296 stream_type = STREAM_TYPE_VIDEO_CAVS;

297 break;

298 case AV_CODEC_ID_DIRAC:

299 stream_type = STREAM_TYPE_VIDEO_DIRAC;

300 break;

301 case AV_CODEC_ID_MP2:

302 case AV_CODEC_ID_MP3:

303 stream_type = STREAM_TYPE_AUDIO_MPEG1;

304 break;

305 case AV_CODEC_ID_AAC:

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

307 break;

308 case AV_CODEC_ID_AAC_LATM:

309 stream_type = STREAM_TYPE_AUDIO_AAC_LATM;

310 break;

311 case AV_CODEC_ID_AC3:

312 stream_type = STREAM_TYPE_AUDIO_AC3;

313 break;

314 default:

315 stream_type = STREAM_TYPE_PRIVATE_DATA;

316 break;

317 }

318 *q++ = stream_type;

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

320 desc_length_ptr = q;

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

322

323 /* write optional descriptors here */

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

325 case AVMEDIA_TYPE_AUDIO:

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

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

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

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

330 }

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

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

333 *q++ = 4;

334 *q++ = 'B';

335 *q++ = 'S';

336 *q++ = 'S';

337 *q++ = 'D';

338 }

339

340 if (lang) {

341 char *p;

342 char *next = lang->value;

343 uint8_t *len_ptr;

344

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

346 len_ptr = q++;

347 *len_ptr = 0;

348

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

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

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

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

353

354 *q++ = *p++;

355 *q++ = *p++;

356 *q++ = *p++;

357

358 if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)

359 *q++ = 0x01;

360 else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)

361 *q++ = 0x02;

362 else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)

363 *q++ = 0x03;

364 else

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

366

367 *len_ptr += 4;

368 }

369

370 if (*len_ptr == 0)

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

372 }

373 break;

374 case AVMEDIA_TYPE_SUBTITLE:

375 {

376 const char *language;

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

378 *q++ = 0x59;

379 *q++ = 8;

380 *q++ = language[0];

381 *q++ = language[1];

382 *q++ = language[2];

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

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

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

386 q += 4;

387 } else {

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

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

390 }

391 }

392 break;

393 case AVMEDIA_TYPE_VIDEO:

394 if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {

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

396 *q++ = 4;

397 *q++ = 'd';

398 *q++ = 'r';

399 *q++ = 'a';

400 *q++ = 'c';

401 }

402 break;

403 case AVMEDIA_TYPE_DATA:

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

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

406 *q++ = 4;

407 *q++ = 'K';

408 *q++ = 'L';

409 *q++ = 'V';

410 *q++ = 'A';

411 }

412 break;

413 }

414

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

416 desc_length_ptr[0] = val >> 8;

417 desc_length_ptr[1] = val;

418 }

419 mpegts_write_section1(&service->pmt, PMT_TID, service->sid, ts->tables_version, 0, 0,

420 data, q - data);

421 }

422

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

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

425 {

426 uint8_t *q;

427 int len;

428

429 q = *q_ptr;

430 if (!str)

431 len = 0;

432 else

433 len = strlen(str);

434 *q++ = len;

435 memcpy(q, str, len);

436 q += len;

437 *q_ptr = q;

438 }

439

440 static void mpegts_write_sdt(AVFormatContext *s)

441 {

442 MpegTSWrite *ts = s->priv_data;

443 MpegTSService *service;

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

445 int i, running_status, free_ca_mode, val;

446

447 q = data;

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

449 *q++ = 0xff;

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

451 service = ts->services[i];

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

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

454 desc_list_len_ptr = q;

455 q += 2;

456 running_status = 4; /* running */

457 free_ca_mode = 0;

458

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

460 *q++ = 0x48;

461 desc_len_ptr = q;

462 q++;

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

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

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

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

467

468 /* fill descriptor length */

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

470 (q - desc_list_len_ptr - 2);

471 desc_list_len_ptr[0] = val >> 8;

472 desc_list_len_ptr[1] = val;

473 }

474 mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, ts->tables_version, 0, 0,

475 data, q - data);

476 }

477

478 static MpegTSService *mpegts_add_service(MpegTSWrite *ts,

479 int sid,

480 const char *provider_name,

481 const char *name)

482 {

483 MpegTSService *service;

484

485 service = av_mallocz(sizeof(MpegTSService));

486 if (!service)

487 return NULL;

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

489 service->sid = sid;

490 service->provider_name = av_strdup(provider_name);

491 service->name = av_strdup(name);

492 service->pcr_pid = 0x1fff;

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

494 return service;

495 }

496

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

498 {

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

500 ts->first_pcr;

501 }

502

503 static void mpegts_prefix_m2ts_header(AVFormatContext *s)

504 {

505 MpegTSWrite *ts = s->priv_data;

506 if (ts->m2ts_mode) {

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

508 uint32_t tp_extra_header = pcr % 0x3fffffff;

509 tp_extra_header = AV_RB32(&tp_extra_header);

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

511 sizeof(tp_extra_header));

512 }

513 }

514

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

516 {

517 AVFormatContext *ctx = s->opaque;

518 mpegts_prefix_m2ts_header(ctx);

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

520 }

521

522 static int mpegts_write_header(AVFormatContext *s)

523 {

524 MpegTSWrite *ts = s->priv_data;

525 MpegTSWriteStream *ts_st;

526 MpegTSService *service;

527 AVStream *st, *pcr_st = NULL;

528 AVDictionaryEntry *title, *provider;

529 int i, j;

530 const char *service_name;

531 const char *provider_name;

532 int *pids;

533 int ret;

534

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

536 s->max_delay = 0;

537

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

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

540

541 ts->tsid = ts->transport_stream_id;

542 ts->onid = ts->original_network_id;

543 /* allocate a single DVB service */

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

545 if (!title)

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

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

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

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

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

551 service->pmt.write_packet = section_write_packet;

552 service->pmt.opaque = s;

553 service->pmt.cc = 15;

554

555 ts->pat.pid = PAT_PID;

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

557 ts->pat.write_packet = section_write_packet;

558 ts->pat.opaque = s;

559

560 ts->sdt.pid = SDT_PID;

561 ts->sdt.cc = 15;

562 ts->sdt.write_packet = section_write_packet;

563 ts->sdt.opaque = s;

564

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

566 if (!pids)

567 return AVERROR(ENOMEM);

568

569 /* assign pids to each stream */

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

571 st = s->streams[i];

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

573 ts_st = av_mallocz(sizeof(MpegTSWriteStream));

574 if (!ts_st) {

575 ret = AVERROR(ENOMEM);

576 goto fail;

577 }

578 st->priv_data = ts_st;

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

580 if (!ts_st->payload) {

581 ret = AVERROR(ENOMEM);

582 goto fail;

583 }

584 ts_st->service = service;

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

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

587 if (st->id < 16) {

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

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

590 ts_st->pid = st->id;

591 } else {

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

593 ret = AVERROR(EINVAL);

594 goto fail;

595 }

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

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

598 ret = AVERROR(EINVAL);

599 goto fail;

600 }

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

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

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

604 ret = AVERROR(EINVAL);

605 goto fail;

606 }

607 pids[i] = ts_st->pid;

608 ts_st->payload_pts = AV_NOPTS_VALUE;

609 ts_st->payload_dts = AV_NOPTS_VALUE;

610 ts_st->first_pts_check = 1;

611 ts_st->cc = 15;

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

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

614 service->pcr_pid == 0x1fff) {

615 service->pcr_pid = ts_st->pid;

616 pcr_st = st;

617 }

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

619 st->codec->extradata_size > 0)

620 {

621 AVStream *ast;

622 ts_st->amux = avformat_alloc_context();

623 if (!ts_st->amux) {

624 ret = AVERROR(ENOMEM);

625 goto fail;

626 }

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

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

629 ret = AVERROR(EINVAL);

630 goto fail;

631 }

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

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

634 if (ret != 0)

635 goto fail;

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

637 if (ret < 0)

638 goto fail;

639 }

640 }

641

642 av_free(pids);

643

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

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

646 pcr_st = s->streams[0];

647 ts_st = pcr_st->priv_data;

648 service->pcr_pid = ts_st->pid;

649 }

650

651 if (ts->mux_rate > 1) {

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

653 (TS_PACKET_SIZE * 8 * 1000);

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

655 (TS_PACKET_SIZE * 8 * 1000);

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

657 (TS_PACKET_SIZE * 8 * 1000);

658

659 if(ts->copyts < 1)

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

661 } else {

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

663 ts->sdt_packet_period = 200;

664 ts->pat_packet_period = 40;

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

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

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

668 service->pcr_packet_period =

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

670 } else {

671 service->pcr_packet_period =

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

673 }

674 } else {

675 // max delta PCR 0.1s

676 service->pcr_packet_period =

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

678 }

679 if(!service->pcr_packet_period)

680 service->pcr_packet_period = 1;

681 }

682

683 // output a PCR as soon as possible

684 service->pcr_packet_count = service->pcr_packet_period;

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

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

687

688 if (ts->mux_rate == 1)

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

690 else

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

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

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

694 service->pcr_packet_period,

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

696

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

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

699 ts->m2ts_mode = 1;

700 } else {

701 ts->m2ts_mode = 0;

702 }

703 }

704

705 avio_flush(s->pb);

706

707 return 0;

708

709 fail:

710 av_free(pids);

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

712 MpegTSWriteStream *ts_st;

713 st = s->streams[i];

714 ts_st = st->priv_data;

715 if (ts_st) {

716 av_freep(&ts_st->payload);

717 if (ts_st->amux) {

718 avformat_free_context(ts_st->amux);

719 ts_st->amux = NULL;

720 }

721 }

722 av_freep(&st->priv_data);

723 }

724 return ret;

725 }

726

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

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

729 {

730 MpegTSWrite *ts = s->priv_data;

731 int i;

732

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

734 ts->sdt_packet_count = 0;

735 mpegts_write_sdt(s);

736 }

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

738 ts->pat_packet_count = 0;

739 mpegts_write_pat(s);

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

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

742 }

743 }

744 }

745

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

747 {

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

749

750 *buf++ = pcr_high >> 25;

751 *buf++ = pcr_high >> 17;

752 *buf++ = pcr_high >> 9;

753 *buf++ = pcr_high >> 1;

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

755 *buf++ = pcr_low;

756

757 return 6;

758 }

759

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

761 static void mpegts_insert_null_packet(AVFormatContext *s)

762 {

763 uint8_t *q;

764 uint8_t buf[TS_PACKET_SIZE];

765

766 q = buf;

767 *q++ = 0x47;

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

769 *q++ = 0xff;

770 *q++ = 0x10;

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

772 mpegts_prefix_m2ts_header(s);

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

774 }

775

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

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

778 {

779 MpegTSWrite *ts = s->priv_data;

780 MpegTSWriteStream *ts_st = st->priv_data;

781 uint8_t *q;

782 uint8_t buf[TS_PACKET_SIZE];

783

784 q = buf;

785 *q++ = 0x47;

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

787 *q++ = ts_st->pid;

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

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

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

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

792

793 /* PCR coded into 6 bytes */

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

795

796 /* stuffing bytes */

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

798 mpegts_prefix_m2ts_header(s);

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

800 }

801

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

803 {

804 int val;

805

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

807 *q++ = val;

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

809 *q++ = val >> 8;

810 *q++ = val;

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

812 *q++ = val >> 8;

813 *q++ = val;

814 }

815

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

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

818 {

819 // expect at least one flag to set

820 av_assert0(flag);

821

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

823 // no AF yet, set adaptation field flag

824 pkt[3] |= 0x20;

825 // 1 byte length, no flags

826 pkt[4] = 1;

827 pkt[5] = 0;

828 }

829 pkt[5] |= flag;

830 }

831

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

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

834 {

835 // expect already existing adaptation field

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

837 pkt[4] += size;

838 }

839

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

841 static uint8_t *get_ts_payload_start(uint8_t *pkt)

842 {

843 if (pkt[3] & 0x20)

844 return pkt + 5 + pkt[4];

845 else

846 return pkt + 4;

847 }

848

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

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

851 * to exactly fill the last ts packet.

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

853 */

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

855 const uint8_t *payload, int payload_size,

856 int64_t pts, int64_t dts, int key)

857 {

858 MpegTSWriteStream *ts_st = st->priv_data;

859 MpegTSWrite *ts = s->priv_data;

860 uint8_t buf[TS_PACKET_SIZE];

861 uint8_t *q;

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

863 int afc_len, stuffing_len;

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

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

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

867

868 is_start = 1;

869 while (payload_size > 0) {

870 retransmit_si_info(s, force_pat);

871 force_pat = 0;

872

873 write_pcr = 0;

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

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

876 ts_st->service->pcr_packet_count++;

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

878 ts_st->service->pcr_packet_period) {

879 ts_st->service->pcr_packet_count = 0;

880 write_pcr = 1;

881 }

882 }

883

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

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

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

887 if (write_pcr)

888 mpegts_insert_pcr_only(s, st);

889 else

890 mpegts_insert_null_packet(s);

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

892 }

893

894 /* prepare packet header */

895 q = buf;

896 *q++ = 0x47;

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

898 if (is_start)

899 val |= 0x40;

900 *q++ = val;

901 *q++ = ts_st->pid;

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

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

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

905 // set Random Access for key frames

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

907 write_pcr = 1;

908 set_af_flag(buf, 0x40);

909 q = get_ts_payload_start(buf);

910 }

911 if (write_pcr) {

912 set_af_flag(buf, 0x10);

913 q = get_ts_payload_start(buf);

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

915 if (ts->mux_rate > 1)

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

917 else

918 pcr = (dts - delay)*300;

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

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

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

922 q = get_ts_payload_start(buf);

923 }

924 if (is_start) {

925 int pes_extension = 0;

926 /* write PES header */

927 *q++ = 0x00;

928 *q++ = 0x00;

929 *q++ = 0x01;

930 private_code = 0;

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

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

933 *q++ = 0xfd;

934 } else

935 *q++ = 0xe0;

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

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

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

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

940 *q++ = 0xc0;

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

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

943 ts->m2ts_mode) {

944 *q++ = 0xfd;

945 } else {

946 *q++ = 0xbd;

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

948 private_code = 0x20;

949 }

950 }

951 header_len = 0;

952 flags = 0;

953 if (pts != AV_NOPTS_VALUE) {

954 header_len += 5;

955 flags |= 0x80;

956 }

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

958 header_len += 5;

959 flags |= 0x40;

960 }

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

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

963 /* set PES_extension_flag */

964 pes_extension = 1;

965 flags |= 0x01;

966

967 /*

968 * One byte for PES2 extension flag +

969 * one byte for extension length +

970 * one byte for extension id

971 */

972 header_len += 3;

973 }

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

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

976 */

977 if (ts->m2ts_mode &&

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

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

980 /* set PES_extension_flag */

981 pes_extension = 1;

982 flags |= 0x01;

983 header_len += 3;

984 }

985 len = payload_size + header_len + 3;

986 if (private_code != 0)

987 len++;

988 if (len > 0xffff)

989 len = 0;

990 *q++ = len >> 8;

991 *q++ = len;

992 val = 0x80;

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

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

995 val |= 0x04;

996 *q++ = val;

997 *q++ = flags;

998 *q++ = header_len;

999 if (pts != AV_NOPTS_VALUE) {

1000 write_pts(q, flags >> 6, pts);

1001 q += 5;

1002 }

1003 if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {

1004 write_pts(q, 1, dts);

1005 q += 5;

1006 }

1007 if (pes_extension && st->codec->codec_id == AV_CODEC_ID_DIRAC) {

1008 flags = 0x01; /* set PES_extension_flag_2 */

1009 *q++ = flags;

1010 *q++ = 0x80 | 0x01; /* marker bit + extension length */

1011 /*

1012 * Set the stream id extension flag bit to 0 and

1013 * write the extended stream id

1014 */

1015 *q++ = 0x00 | 0x60;

1016 }

1017 /* For Blu-ray AC3 Audio Setting extended flags */

1018 if (ts->m2ts_mode &&

1019 pes_extension &&

1020 st->codec->codec_id == AV_CODEC_ID_AC3) {

1021 flags = 0x01; /* set PES_extension_flag_2 */

1022 *q++ = flags;

1023 *q++ = 0x80 | 0x01; /* marker bit + extension length */

1024 *q++ = 0x00 | 0x71; /* for AC3 Audio (specifically on blue-rays) */

1025 }

1026

1027

1028 if (private_code != 0)

1029 *q++ = private_code;

1030 is_start = 0;

1031 }

1032 /* header size */

1033 header_len = q - buf;

1034 /* data len */

1035 len = TS_PACKET_SIZE - header_len;

1036 if (len > payload_size)

1037 len = payload_size;

1038 stuffing_len = TS_PACKET_SIZE - header_len - len;

1039 if (stuffing_len > 0) {

1040 /* add stuffing with AFC */

1041 if (buf[3] & 0x20) {

1042 /* stuffing already present: increase its size */

1043 afc_len = buf[4] + 1;

1044 memmove(buf + 4 + afc_len + stuffing_len,

1045 buf + 4 + afc_len,

1046 header_len - (4 + afc_len));

1047 buf[4] += stuffing_len;

1048 memset(buf + 4 + afc_len, 0xff, stuffing_len);

1049 } else {

1050 /* add stuffing */

1051 memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);

1052 buf[3] |= 0x20;

1053 buf[4] = stuffing_len - 1;

1054 if (stuffing_len >= 2) {

1055 buf[5] = 0x00;

1056 memset(buf + 6, 0xff, stuffing_len - 2);

1057 }

1058 }

1059 }

1060 memcpy(buf + TS_PACKET_SIZE - len, payload, len);

1061 payload += len;

1062 payload_size -= len;

1063 mpegts_prefix_m2ts_header(s);

1064 avio_write(s->pb, buf, TS_PACKET_SIZE);

1065 }

1066 avio_flush(s->pb);

1067 ts_st->prev_payload_key = key;

1068 }

1069

1070 static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)

1071 {

1072 AVStream *st = s->streams[pkt->stream_index];

1073 int size = pkt->size;

1074 uint8_t *buf= pkt->data;

1075 uint8_t *data= NULL;

1076 MpegTSWrite *ts = s->priv_data;

1077 MpegTSWriteStream *ts_st = st->priv_data;

1078 const int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE)*2;

1079 int64_t dts = pkt->dts, pts = pkt->pts;

1080

1081 if (ts->reemit_pat_pmt) {

1082 av_log(s, AV_LOG_WARNING, "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");

1083 ts->reemit_pat_pmt = 0;

1084 ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;

1085 }

1086

1087 if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {

1088 ts->pat_packet_count = ts->pat_packet_period - 1;

1089 ts->sdt_packet_count = ts->sdt_packet_period - 1;

1090 ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;

1091 }

1092

1093 if(ts->copyts < 1){

1094 if (pts != AV_NOPTS_VALUE)

1095 pts += delay;

1096 if (dts != AV_NOPTS_VALUE)

1097 dts += delay;

1098 }

1099

1100 if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {

1101 av_log(s, AV_LOG_ERROR, "first pts value must be set\n");

1102 return AVERROR_INVALIDDATA;

1103 }

1104 ts_st->first_pts_check = 0;

1105

1106 if (st->codec->codec_id == AV_CODEC_ID_H264) {

1107 const uint8_t *p = buf, *buf_end = p+size;

1108 uint32_t state = -1;

1109

1110 if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {

1111 if (!st->nb_frames) {

1112 av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "

1113 "no startcode found, use the h264_mp4toannexb bitstream filter (-bsf h264_mp4toannexb)\n");

1114 return AVERROR(EINVAL);

1115 }

1116 av_log(s, AV_LOG_WARNING, "H.264 bitstream error, startcode missing\n");

1117 }

1118

1119 do {

1120 p = avpriv_find_start_code(p, buf_end, &state);

1121 av_dlog(s, "nal %d\n", state & 0x1f);

1122 } while (p < buf_end && (state & 0x1f) != 9 &&

1123 (state & 0x1f) != 5 && (state & 0x1f) != 1);

1124

1125 if ((state & 0x1f) != 9) { // AUD NAL

1126 data = av_malloc(pkt->size+6);

1127 if (!data)

1128 return AVERROR(ENOMEM);

1129 memcpy(data+6, pkt->data, pkt->size);

1130 AV_WB32(data, 0x00000001);

1131 data[4] = 0x09;

1132 data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit

1133 buf = data;

1134 size = pkt->size+6;

1135 }

1136 } else if (st->codec->codec_id == AV_CODEC_ID_AAC) {

1137 if (pkt->size < 2) {

1138 av_log(s, AV_LOG_ERROR, "AAC packet too short\n");

1139 return AVERROR_INVALIDDATA;

1140 }

1141 if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {

1142 int ret;

1143 AVPacket pkt2;

1144

1145 if (!ts_st->amux) {

1146 av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "

1147 "and extradata missing\n");

1148 return AVERROR_INVALIDDATA;

1149 }

1150

1151 av_init_packet(&pkt2);

1152 pkt2.data = pkt->data;

1153 pkt2.size = pkt->size;

1154 ret = avio_open_dyn_buf(&ts_st->amux->pb);

1155 if (ret < 0)

1156 return AVERROR(ENOMEM);

1157

1158 ret = av_write_frame(ts_st->amux, &pkt2);

1159 if (ret < 0) {

1160 avio_close_dyn_buf(ts_st->amux->pb, &data);

1161 ts_st->amux->pb = NULL;

1162 av_free(data);

1163 return ret;

1164 }

1165 size = avio_close_dyn_buf(ts_st->amux->pb, &data);

1166 ts_st->amux->pb = NULL;

1167 buf = data;

1168 }

1169 }

1170

1171 if (pkt->dts != AV_NOPTS_VALUE) {

1172 int i;

1173 for(i=0; i<s->nb_streams; i++){

1174 AVStream *st2 = s->streams[i];

1175 MpegTSWriteStream *ts_st2 = st2->priv_data;

1176 if( ts_st2->payload_size

1177 && (ts_st2->payload_dts == AV_NOPTS_VALUE || dts - ts_st2->payload_dts > delay/2)){

1178 mpegts_write_pes(s, st2, ts_st2->payload, ts_st2->payload_size,

1179 ts_st2->payload_pts, ts_st2->payload_dts,

1180 ts_st2->payload_flags & AV_PKT_FLAG_KEY);

1181 ts_st2->payload_size = 0;

1182 }

1183 }

1184 }

1185

1186 if (ts_st->payload_size && ts_st->payload_size + size > ts->pes_payload_size) {

1187 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,

1188 ts_st->payload_pts, ts_st->payload_dts,

1189 ts_st->payload_flags & AV_PKT_FLAG_KEY);

1190 ts_st->payload_size = 0;

1191 }

1192

1193 if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO || size > ts->pes_payload_size) {

1194 av_assert0(!ts_st->payload_size);

1195 // for video and subtitle, write a single pes packet

1196 mpegts_write_pes(s, st, buf, size, pts, dts, pkt->flags & AV_PKT_FLAG_KEY);

1197 av_free(data);

1198 return 0;

1199 }

1200

1201 if (!ts_st->payload_size) {

1202 ts_st->payload_pts = pts;

1203 ts_st->payload_dts = dts;

1204 ts_st->payload_flags = pkt->flags;

1205 }

1206

1207 memcpy(ts_st->payload + ts_st->payload_size, buf, size);

1208 ts_st->payload_size += size;

1209

1210 av_free(data);

1211

1212 return 0;

1213 }

1214

1215 static void mpegts_write_flush(AVFormatContext *s)

1216 {

1217 int i;

1218

1219 /* flush current packets */

1220 for(i = 0; i < s->nb_streams; i++) {

1221 AVStream *st = s->streams[i];

1222 MpegTSWriteStream *ts_st = st->priv_data;

1223 if (ts_st->payload_size > 0) {

1224 mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,

1225 ts_st->payload_pts, ts_st->payload_dts,

1226 ts_st->payload_flags & AV_PKT_FLAG_KEY);

1227 ts_st->payload_size = 0;

1228 }

1229 }

1230 avio_flush(s->pb);

1231 }

1232

1233 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)

1234 {

1235 if (!pkt) {

1236 mpegts_write_flush(s);

1237 return 1;

1238 } else {

1239 return mpegts_write_packet_internal(s, pkt);

1240 }

1241 }

1242

1243 static int mpegts_write_end(AVFormatContext *s)

1244 {

1245 MpegTSWrite *ts = s->priv_data;

1246 MpegTSService *service;

1247 int i;

1248

1249 mpegts_write_flush(s);

1250

1251 for(i = 0; i < s->nb_streams; i++) {

1252 AVStream *st = s->streams[i];

1253 MpegTSWriteStream *ts_st = st->priv_data;

1254 av_freep(&ts_st->payload);

1255 if (ts_st->amux) {

1256 avformat_free_context(ts_st->amux);

1257 ts_st->amux = NULL;

1258 }

1259 }

1260

1261 for(i = 0; i < ts->nb_services; i++) {

1262 service = ts->services[i];

1263 av_freep(&service->provider_name);

1264 av_freep(&service->name);

1265 av_free(service);

1266 }

1267 av_free(ts->services);

1268

1269 return 0;

1270 }

1271

1272 AVOutputFormat ff_mpegts_muxer = {

1273 .name = "mpegts",

1274 .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),

1275 .mime_type = "video/x-mpegts",

1276 .extensions = "ts,m2t,m2ts,mts",

1277 .priv_data_size = sizeof(MpegTSWrite),

1278 .audio_codec = AV_CODEC_ID_MP2,

1279 .video_codec = AV_CODEC_ID_MPEG2VIDEO,

1280 .write_header = mpegts_write_header,

1281 .write_packet = mpegts_write_packet,

1282 .write_trailer = mpegts_write_end,

1283 .flags = AVFMT_ALLOW_FLUSH,

1284 .priv_class = &mpegts_muxer_class,

1285 };

Generated on Sat Jan 25 2014 19:52:03 for FFmpeg by doxygen 1.8.2