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