1/* 2 * MXF demuxer. 3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com> 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/* 23 * References 24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value 25 * SMPTE 377M MXF File Format Specifications 26 * SMPTE 378M Operational Pattern 1a 27 * SMPTE 379M MXF Generic Container 28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container 29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container 30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container 31 * 32 * Principle 33 * Search for Track numbers which will identify essence element KLV packets. 34 * Search for SourcePackage which define tracks which contains Track numbers. 35 * Material Package contains tracks with reference to SourcePackage tracks. 36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters. 37 * Assign Descriptors to correct Tracks. 38 * 39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext. 40 * Metadata parsing resolves Strong References to objects. 41 * 42 * Simple demuxer, only OP1A supported and some files might not work at all. 43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1 44 */ 45 46//#define DEBUG 47 48#include "libavutil/aes.h" 49#include "libavcodec/bytestream.h" 50#include "avformat.h" 51#include "mxf.h" 52 53typedef struct { 54 UID uid; 55 enum MXFMetadataSetType type; 56 UID source_container_ul; 57} MXFCryptoContext; 58 59typedef struct { 60 UID uid; 61 enum MXFMetadataSetType type; 62 UID source_package_uid; 63 UID data_definition_ul; 64 int64_t duration; 65 int64_t start_position; 66 int source_track_id; 67} MXFStructuralComponent; 68 69typedef struct { 70 UID uid; 71 enum MXFMetadataSetType type; 72 UID data_definition_ul; 73 UID *structural_components_refs; 74 int structural_components_count; 75 int64_t duration; 76} MXFSequence; 77 78typedef struct { 79 UID uid; 80 enum MXFMetadataSetType type; 81 MXFSequence *sequence; /* mandatory, and only one */ 82 UID sequence_ref; 83 int track_id; 84 uint8_t track_number[4]; 85 AVRational edit_rate; 86} MXFTrack; 87 88typedef struct { 89 UID uid; 90 enum MXFMetadataSetType type; 91 UID essence_container_ul; 92 UID essence_codec_ul; 93 AVRational sample_rate; 94 AVRational aspect_ratio; 95 int width; 96 int height; 97 int channels; 98 int bits_per_sample; 99 UID *sub_descriptors_refs; 100 int sub_descriptors_count; 101 int linked_track_id; 102 uint8_t *extradata; 103 int extradata_size; 104} MXFDescriptor; 105 106typedef struct { 107 UID uid; 108 enum MXFMetadataSetType type; 109} MXFIndexTableSegment; 110 111typedef struct { 112 UID uid; 113 enum MXFMetadataSetType type; 114 UID package_uid; 115 UID *tracks_refs; 116 int tracks_count; 117 MXFDescriptor *descriptor; /* only one */ 118 UID descriptor_ref; 119} MXFPackage; 120 121typedef struct { 122 UID uid; 123 enum MXFMetadataSetType type; 124} MXFMetadataSet; 125 126typedef struct { 127 UID *packages_refs; 128 int packages_count; 129 MXFMetadataSet **metadata_sets; 130 int metadata_sets_count; 131 AVFormatContext *fc; 132 struct AVAES *aesc; 133 uint8_t *local_tags; 134 int local_tags_count; 135} MXFContext; 136 137enum MXFWrappingScheme { 138 Frame, 139 Clip, 140}; 141 142typedef struct { 143 const UID key; 144 int (*read)(); 145 int ctx_size; 146 enum MXFMetadataSetType type; 147} MXFMetadataReadTableEntry; 148 149/* partial keys to match */ 150static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 }; 151static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 }; 152static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 }; 153/* complete keys to match */ 154static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 }; 155static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 }; 156static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 }; 157static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 }; 158 159#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y))) 160 161static int64_t klv_decode_ber_length(ByteIOContext *pb) 162{ 163 uint64_t size = get_byte(pb); 164 if (size & 0x80) { /* long form */ 165 int bytes_num = size & 0x7f; 166 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */ 167 if (bytes_num > 8) 168 return -1; 169 size = 0; 170 while (bytes_num--) 171 size = size << 8 | get_byte(pb); 172 } 173 return size; 174} 175 176static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size) 177{ 178 int i, b; 179 for (i = 0; i < size && !url_feof(pb); i++) { 180 b = get_byte(pb); 181 if (b == key[0]) 182 i = 0; 183 else if (b != key[i]) 184 i = -1; 185 } 186 return i == size; 187} 188 189static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb) 190{ 191 if (!mxf_read_sync(pb, mxf_klv_key, 4)) 192 return -1; 193 klv->offset = url_ftell(pb) - 4; 194 memcpy(klv->key, mxf_klv_key, 4); 195 get_buffer(pb, klv->key + 4, 12); 196 klv->length = klv_decode_ber_length(pb); 197 return klv->length == -1 ? -1 : 0; 198} 199 200static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv) 201{ 202 int i; 203 204 for (i = 0; i < s->nb_streams; i++) { 205 MXFTrack *track = s->streams[i]->priv_data; 206 /* SMPTE 379M 7.3 */ 207 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number))) 208 return i; 209 } 210 /* return 0 if only one stream, for OP Atom files with 0 as track number */ 211 return s->nb_streams == 1 ? 0 : -1; 212} 213 214/* XXX: use AVBitStreamFilter */ 215static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length) 216{ 217 uint8_t buffer[61444]; 218 const uint8_t *buf_ptr, *end_ptr; 219 uint8_t *data_ptr; 220 int i; 221 222 if (length > 61444) /* worst case PAL 1920 samples 8 channels */ 223 return -1; 224 get_buffer(pb, buffer, length); 225 av_new_packet(pkt, length); 226 data_ptr = pkt->data; 227 end_ptr = buffer + length; 228 buf_ptr = buffer + 4; /* skip SMPTE 331M header */ 229 for (; buf_ptr < end_ptr; ) { 230 for (i = 0; i < st->codec->channels; i++) { 231 uint32_t sample = bytestream_get_le32(&buf_ptr); 232 if (st->codec->bits_per_coded_sample == 24) 233 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff); 234 else 235 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff); 236 } 237 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M 238 } 239 pkt->size = data_ptr - pkt->data; 240 return 0; 241} 242 243static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv) 244{ 245 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b}; 246 MXFContext *mxf = s->priv_data; 247 ByteIOContext *pb = s->pb; 248 int64_t end = url_ftell(pb) + klv->length; 249 uint64_t size; 250 uint64_t orig_size; 251 uint64_t plaintext_size; 252 uint8_t ivec[16]; 253 uint8_t tmpbuf[16]; 254 int index; 255 256 if (!mxf->aesc && s->key && s->keylen == 16) { 257 mxf->aesc = av_malloc(av_aes_size); 258 if (!mxf->aesc) 259 return -1; 260 av_aes_init(mxf->aesc, s->key, 128, 1); 261 } 262 // crypto context 263 url_fskip(pb, klv_decode_ber_length(pb)); 264 // plaintext offset 265 klv_decode_ber_length(pb); 266 plaintext_size = get_be64(pb); 267 // source klv key 268 klv_decode_ber_length(pb); 269 get_buffer(pb, klv->key, 16); 270 if (!IS_KLV_KEY(klv, mxf_essence_element_key)) 271 return -1; 272 index = mxf_get_stream_index(s, klv); 273 if (index < 0) 274 return -1; 275 // source size 276 klv_decode_ber_length(pb); 277 orig_size = get_be64(pb); 278 if (orig_size < plaintext_size) 279 return -1; 280 // enc. code 281 size = klv_decode_ber_length(pb); 282 if (size < 32 || size - 32 < orig_size) 283 return -1; 284 get_buffer(pb, ivec, 16); 285 get_buffer(pb, tmpbuf, 16); 286 if (mxf->aesc) 287 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1); 288 if (memcmp(tmpbuf, checkv, 16)) 289 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n"); 290 size -= 32; 291 av_get_packet(pb, pkt, size); 292 size -= plaintext_size; 293 if (mxf->aesc) 294 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size], 295 &pkt->data[plaintext_size], size >> 4, ivec, 1); 296 pkt->size = orig_size; 297 pkt->stream_index = index; 298 url_fskip(pb, end - url_ftell(pb)); 299 return 0; 300} 301 302static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) 303{ 304 KLVPacket klv; 305 306 while (!url_feof(s->pb)) { 307 if (klv_read_packet(&klv, s->pb) < 0) 308 return -1; 309 PRINT_KEY(s, "read packet", klv.key); 310 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset); 311 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { 312 int res = mxf_decrypt_triplet(s, pkt, &klv); 313 if (res < 0) { 314 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); 315 return -1; 316 } 317 return 0; 318 } 319 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { 320 int index = mxf_get_stream_index(s, &klv); 321 if (index < 0) { 322 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); 323 goto skip; 324 } 325 if (s->streams[index]->discard == AVDISCARD_ALL) 326 goto skip; 327 /* check for 8 channels AES3 element */ 328 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { 329 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) { 330 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); 331 return -1; 332 } 333 } else 334 av_get_packet(s->pb, pkt, klv.length); 335 pkt->stream_index = index; 336 pkt->pos = klv.offset; 337 return 0; 338 } else 339 skip: 340 url_fskip(s->pb, klv.length); 341 } 342 return AVERROR(EIO); 343} 344 345static int mxf_read_primer_pack(MXFContext *mxf) 346{ 347 ByteIOContext *pb = mxf->fc->pb; 348 int item_num = get_be32(pb); 349 int item_len = get_be32(pb); 350 351 if (item_len != 18) { 352 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n"); 353 return -1; 354 } 355 if (item_num > UINT_MAX / item_len) 356 return -1; 357 mxf->local_tags_count = item_num; 358 mxf->local_tags = av_malloc(item_num*item_len); 359 if (!mxf->local_tags) 360 return -1; 361 get_buffer(pb, mxf->local_tags, item_num*item_len); 362 return 0; 363} 364 365static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) 366{ 367 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); 368 if (!mxf->metadata_sets) 369 return -1; 370 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set; 371 mxf->metadata_sets_count++; 372 return 0; 373} 374 375static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid) 376{ 377 if (size != 16) 378 return -1; 379 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul)) 380 get_buffer(pb, cryptocontext->source_container_ul, 16); 381 return 0; 382} 383 384static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag) 385{ 386 switch (tag) { 387 case 0x1901: 388 mxf->packages_count = get_be32(pb); 389 if (mxf->packages_count >= UINT_MAX / sizeof(UID)) 390 return -1; 391 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID)); 392 if (!mxf->packages_refs) 393 return -1; 394 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 395 get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID)); 396 break; 397 } 398 return 0; 399} 400 401static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag) 402{ 403 switch(tag) { 404 case 0x0202: 405 source_clip->duration = get_be64(pb); 406 break; 407 case 0x1201: 408 source_clip->start_position = get_be64(pb); 409 break; 410 case 0x1101: 411 /* UMID, only get last 16 bytes */ 412 url_fskip(pb, 16); 413 get_buffer(pb, source_clip->source_package_uid, 16); 414 break; 415 case 0x1102: 416 source_clip->source_track_id = get_be32(pb); 417 break; 418 } 419 return 0; 420} 421 422static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag) 423{ 424 switch(tag) { 425 case 0x4403: 426 package->tracks_count = get_be32(pb); 427 if (package->tracks_count >= UINT_MAX / sizeof(UID)) 428 return -1; 429 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); 430 if (!package->tracks_refs) 431 return -1; 432 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 433 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); 434 break; 435 } 436 return 0; 437} 438 439static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag) 440{ 441 switch(tag) { 442 case 0x4801: 443 track->track_id = get_be32(pb); 444 break; 445 case 0x4804: 446 get_buffer(pb, track->track_number, 4); 447 break; 448 case 0x4B01: 449 track->edit_rate.den = get_be32(pb); 450 track->edit_rate.num = get_be32(pb); 451 break; 452 case 0x4803: 453 get_buffer(pb, track->sequence_ref, 16); 454 break; 455 } 456 return 0; 457} 458 459static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag) 460{ 461 switch(tag) { 462 case 0x0202: 463 sequence->duration = get_be64(pb); 464 break; 465 case 0x0201: 466 get_buffer(pb, sequence->data_definition_ul, 16); 467 break; 468 case 0x1001: 469 sequence->structural_components_count = get_be32(pb); 470 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID)) 471 return -1; 472 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID)); 473 if (!sequence->structural_components_refs) 474 return -1; 475 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 476 get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID)); 477 break; 478 } 479 return 0; 480} 481 482static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag) 483{ 484 switch(tag) { 485 case 0x4403: 486 package->tracks_count = get_be32(pb); 487 if (package->tracks_count >= UINT_MAX / sizeof(UID)) 488 return -1; 489 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); 490 if (!package->tracks_refs) 491 return -1; 492 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 493 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); 494 break; 495 case 0x4401: 496 /* UMID, only get last 16 bytes */ 497 url_fskip(pb, 16); 498 get_buffer(pb, package->package_uid, 16); 499 break; 500 case 0x4701: 501 get_buffer(pb, package->descriptor_ref, 16); 502 break; 503 } 504 return 0; 505} 506 507static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag) 508{ 509 switch(tag) { 510 case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break; 511 case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break; 512 case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break; 513 case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break; 514 case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break; 515 case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break; 516 } 517 return 0; 518} 519 520static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor) 521{ 522 int code; 523 524 do { 525 code = get_byte(pb); 526 dprintf(NULL, "pixel layout: code %#x\n", code); 527 switch (code) { 528 case 0x52: /* R */ 529 descriptor->bits_per_sample += get_byte(pb); 530 break; 531 case 0x47: /* G */ 532 descriptor->bits_per_sample += get_byte(pb); 533 break; 534 case 0x42: /* B */ 535 descriptor->bits_per_sample += get_byte(pb); 536 break; 537 default: 538 get_byte(pb); 539 } 540 } while (code != 0); /* SMPTE 377M E.2.46 */ 541} 542 543static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid) 544{ 545 switch(tag) { 546 case 0x3F01: 547 descriptor->sub_descriptors_count = get_be32(pb); 548 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID)) 549 return -1; 550 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID)); 551 if (!descriptor->sub_descriptors_refs) 552 return -1; 553 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 554 get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID)); 555 break; 556 case 0x3004: 557 get_buffer(pb, descriptor->essence_container_ul, 16); 558 break; 559 case 0x3006: 560 descriptor->linked_track_id = get_be32(pb); 561 break; 562 case 0x3201: /* PictureEssenceCoding */ 563 get_buffer(pb, descriptor->essence_codec_ul, 16); 564 break; 565 case 0x3203: 566 descriptor->width = get_be32(pb); 567 break; 568 case 0x3202: 569 descriptor->height = get_be32(pb); 570 break; 571 case 0x320E: 572 descriptor->aspect_ratio.num = get_be32(pb); 573 descriptor->aspect_ratio.den = get_be32(pb); 574 break; 575 case 0x3D03: 576 descriptor->sample_rate.num = get_be32(pb); 577 descriptor->sample_rate.den = get_be32(pb); 578 break; 579 case 0x3D06: /* SoundEssenceCompression */ 580 get_buffer(pb, descriptor->essence_codec_ul, 16); 581 break; 582 case 0x3D07: 583 descriptor->channels = get_be32(pb); 584 break; 585 case 0x3D01: 586 descriptor->bits_per_sample = get_be32(pb); 587 break; 588 case 0x3401: 589 mxf_read_pixel_layout(pb, descriptor); 590 break; 591 default: 592 /* Private uid used by SONY C0023S01.mxf */ 593 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) { 594 descriptor->extradata = av_malloc(size); 595 if (!descriptor->extradata) 596 return -1; 597 descriptor->extradata_size = size; 598 get_buffer(pb, descriptor->extradata, size); 599 } 600 break; 601 } 602 return 0; 603} 604 605/* 606 * Match an uid independently of the version byte and up to len common bytes 607 * Returns: boolean 608 */ 609static int mxf_match_uid(const UID key, const UID uid, int len) 610{ 611 int i; 612 for (i = 0; i < len; i++) { 613 if (i != 7 && key[i] != uid[i]) 614 return 0; 615 } 616 return 1; 617} 618 619static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid) 620{ 621 while (uls->uid[0]) { 622 if(mxf_match_uid(uls->uid, *uid, uls->matching_len)) 623 break; 624 uls++; 625 } 626 return uls; 627} 628 629static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type) 630{ 631 int i; 632 633 if (!strong_ref) 634 return NULL; 635 for (i = 0; i < mxf->metadata_sets_count; i++) { 636 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) && 637 (type == AnyType || mxf->metadata_sets[i]->type == type)) { 638 return mxf->metadata_sets[i]; 639 } 640 } 641 return NULL; 642} 643 644static const MXFCodecUL mxf_essence_container_uls[] = { 645 // video essence container uls 646 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ 647 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ 648 // sound essence container uls 649 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ 650 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */ 651 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */ 652 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE }, 653}; 654 655static int mxf_parse_structural_metadata(MXFContext *mxf) 656{ 657 MXFPackage *material_package = NULL; 658 MXFPackage *temp_package = NULL; 659 int i, j, k; 660 661 dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count); 662 /* TODO: handle multiple material packages (OP3x) */ 663 for (i = 0; i < mxf->packages_count; i++) { 664 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage); 665 if (material_package) break; 666 } 667 if (!material_package) { 668 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n"); 669 return -1; 670 } 671 672 for (i = 0; i < material_package->tracks_count; i++) { 673 MXFPackage *source_package = NULL; 674 MXFTrack *material_track = NULL; 675 MXFTrack *source_track = NULL; 676 MXFTrack *temp_track = NULL; 677 MXFDescriptor *descriptor = NULL; 678 MXFStructuralComponent *component = NULL; 679 UID *essence_container_ul = NULL; 680 const MXFCodecUL *codec_ul = NULL; 681 const MXFCodecUL *container_ul = NULL; 682 AVStream *st; 683 684 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) { 685 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n"); 686 continue; 687 } 688 689 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) { 690 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n"); 691 return -1; 692 } 693 694 /* TODO: handle multiple source clips */ 695 for (j = 0; j < material_track->sequence->structural_components_count; j++) { 696 /* TODO: handle timecode component */ 697 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip); 698 if (!component) 699 continue; 700 701 for (k = 0; k < mxf->packages_count; k++) { 702 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage); 703 if (!temp_package) 704 continue; 705 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) { 706 source_package = temp_package; 707 break; 708 } 709 } 710 if (!source_package) { 711 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id); 712 break; 713 } 714 for (k = 0; k < source_package->tracks_count; k++) { 715 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) { 716 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n"); 717 return -1; 718 } 719 if (temp_track->track_id == component->source_track_id) { 720 source_track = temp_track; 721 break; 722 } 723 } 724 if (!source_track) { 725 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id); 726 break; 727 } 728 } 729 if (!source_track) 730 continue; 731 732 st = av_new_stream(mxf->fc, source_track->track_id); 733 if (!st) { 734 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n"); 735 return -1; 736 } 737 st->priv_data = source_track; 738 st->duration = component->duration; 739 if (st->duration == -1) 740 st->duration = AV_NOPTS_VALUE; 741 st->start_time = component->start_position; 742 av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den); 743 744 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) { 745 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n"); 746 return -1; 747 } 748 749 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul); 750 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul); 751 st->codec->codec_type = codec_ul->id; 752 753 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType); 754 if (source_package->descriptor) { 755 if (source_package->descriptor->type == MultipleDescriptor) { 756 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) { 757 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor); 758 759 if (!sub_descriptor) { 760 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n"); 761 continue; 762 } 763 if (sub_descriptor->linked_track_id == source_track->track_id) { 764 descriptor = sub_descriptor; 765 break; 766 } 767 } 768 } else if (source_package->descriptor->type == Descriptor) 769 descriptor = source_package->descriptor; 770 } 771 if (!descriptor) { 772 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index); 773 continue; 774 } 775 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul); 776 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul); 777 essence_container_ul = &descriptor->essence_container_ul; 778 /* HACK: replacing the original key with mxf_encrypted_essence_container 779 * is not allowed according to s429-6, try to find correct information anyway */ 780 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) { 781 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n"); 782 for (k = 0; k < mxf->metadata_sets_count; k++) { 783 MXFMetadataSet *metadata = mxf->metadata_sets[k]; 784 if (metadata->type == CryptoContext) { 785 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul; 786 break; 787 } 788 } 789 } 790 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */ 791 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul); 792 st->codec->codec_id = codec_ul->id; 793 if (descriptor->extradata) { 794 st->codec->extradata = descriptor->extradata; 795 st->codec->extradata_size = descriptor->extradata_size; 796 } 797 if (st->codec->codec_type == CODEC_TYPE_VIDEO) { 798 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); 799 if (st->codec->codec_id == CODEC_ID_NONE) 800 st->codec->codec_id = container_ul->id; 801 st->codec->width = descriptor->width; 802 st->codec->height = descriptor->height; 803 st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */ 804 st->need_parsing = AVSTREAM_PARSE_HEADERS; 805 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) { 806 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); 807 if (st->codec->codec_id == CODEC_ID_NONE) 808 st->codec->codec_id = container_ul->id; 809 st->codec->channels = descriptor->channels; 810 st->codec->bits_per_coded_sample = descriptor->bits_per_sample; 811 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; 812 /* TODO: implement CODEC_ID_RAWAUDIO */ 813 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) { 814 if (descriptor->bits_per_sample == 24) 815 st->codec->codec_id = CODEC_ID_PCM_S24LE; 816 else if (descriptor->bits_per_sample == 32) 817 st->codec->codec_id = CODEC_ID_PCM_S32LE; 818 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) { 819 if (descriptor->bits_per_sample == 24) 820 st->codec->codec_id = CODEC_ID_PCM_S24BE; 821 else if (descriptor->bits_per_sample == 32) 822 st->codec->codec_id = CODEC_ID_PCM_S32BE; 823 } else if (st->codec->codec_id == CODEC_ID_MP2) { 824 st->need_parsing = AVSTREAM_PARSE_FULL; 825 } 826 } 827 if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { 828 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n"); 829 st->need_parsing = AVSTREAM_PARSE_FULL; 830 } 831 } 832 return 0; 833} 834 835static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = { 836 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack }, 837 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType }, 838 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage }, 839 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage }, 840 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence }, 841 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip }, 842 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor }, 843 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */ 844 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */ 845 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */ 846 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */ 847 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */ 848 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */ 849 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */ 850 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */ 851 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext }, 852 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment }, 853 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType }, 854}; 855 856static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type) 857{ 858 ByteIOContext *pb = mxf->fc->pb; 859 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf; 860 uint64_t klv_end = url_ftell(pb) + klv->length; 861 862 if (!ctx) 863 return -1; 864 while (url_ftell(pb) + 4 < klv_end) { 865 int tag = get_be16(pb); 866 int size = get_be16(pb); /* KLV specified by 0x53 */ 867 uint64_t next = url_ftell(pb) + size; 868 UID uid = {0}; 869 870 dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size); 871 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */ 872 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag); 873 continue; 874 } 875 if (tag > 0x7FFF) { /* dynamic tag */ 876 int i; 877 for (i = 0; i < mxf->local_tags_count; i++) { 878 int local_tag = AV_RB16(mxf->local_tags+i*18); 879 if (local_tag == tag) { 880 memcpy(uid, mxf->local_tags+i*18+2, 16); 881 dprintf(mxf->fc, "local tag %#04x\n", local_tag); 882 PRINT_KEY(mxf->fc, "uid", uid); 883 } 884 } 885 } 886 if (ctx_size && tag == 0x3C0A) 887 get_buffer(pb, ctx->uid, 16); 888 else if (read_child(ctx, pb, tag, size, uid) < 0) 889 return -1; 890 891 url_fseek(pb, next, SEEK_SET); 892 } 893 if (ctx_size) ctx->type = type; 894 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0; 895} 896 897static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) 898{ 899 MXFContext *mxf = s->priv_data; 900 KLVPacket klv; 901 902 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) { 903 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n"); 904 return -1; 905 } 906 url_fseek(s->pb, -14, SEEK_CUR); 907 mxf->fc = s; 908 while (!url_feof(s->pb)) { 909 const MXFMetadataReadTableEntry *metadata; 910 911 if (klv_read_packet(&klv, s->pb) < 0) 912 return -1; 913 PRINT_KEY(s, "read header", klv.key); 914 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset); 915 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) || 916 IS_KLV_KEY(klv.key, mxf_essence_element_key)) { 917 /* FIXME avoid seek */ 918 url_fseek(s->pb, klv.offset, SEEK_SET); 919 break; 920 } 921 922 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) { 923 if (IS_KLV_KEY(klv.key, metadata->key)) { 924 int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read; 925 if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) { 926 av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); 927 return -1; 928 } 929 break; 930 } 931 } 932 if (!metadata->read) 933 url_fskip(s->pb, klv.length); 934 } 935 return mxf_parse_structural_metadata(mxf); 936} 937 938static int mxf_read_close(AVFormatContext *s) 939{ 940 MXFContext *mxf = s->priv_data; 941 int i; 942 943 av_freep(&mxf->packages_refs); 944 for (i = 0; i < mxf->metadata_sets_count; i++) { 945 switch (mxf->metadata_sets[i]->type) { 946 case MultipleDescriptor: 947 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs); 948 break; 949 case Sequence: 950 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs); 951 break; 952 case SourcePackage: 953 case MaterialPackage: 954 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs); 955 break; 956 case Track: 957 mxf->metadata_sets[i] = NULL; /* will be freed later */ 958 break; 959 default: 960 break; 961 } 962 av_freep(&mxf->metadata_sets[i]); 963 } 964 av_freep(&mxf->metadata_sets); 965 av_freep(&mxf->aesc); 966 av_freep(&mxf->local_tags); 967 return 0; 968} 969 970static int mxf_probe(AVProbeData *p) { 971 uint8_t *bufp = p->buf; 972 uint8_t *end = p->buf + p->buf_size; 973 974 if (p->buf_size < sizeof(mxf_header_partition_pack_key)) 975 return 0; 976 977 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */ 978 end -= sizeof(mxf_header_partition_pack_key); 979 for (; bufp < end; bufp++) { 980 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key)) 981 return AVPROBE_SCORE_MAX; 982 } 983 return 0; 984} 985 986/* rudimentary byte seek */ 987/* XXX: use MXF Index */ 988static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) 989{ 990 AVStream *st = s->streams[stream_index]; 991 int64_t seconds; 992 993 if (!s->bit_rate) 994 return -1; 995 if (sample_time < 0) 996 sample_time = 0; 997 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); 998 url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET); 999 av_update_cur_dts(s, st, sample_time); 1000 return 0; 1001} 1002 1003AVInputFormat mxf_demuxer = { 1004 "mxf", 1005 NULL_IF_CONFIG_SMALL("Material eXchange Format"), 1006 sizeof(MXFContext), 1007 mxf_probe, 1008 mxf_read_header, 1009 mxf_read_packet, 1010 mxf_read_close, 1011 mxf_read_seek, 1012}; 1013