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 const uint8_t *buf_ptr, *end_ptr; 218 uint8_t *data_ptr; 219 int i; 220 221 if (length > 61444) /* worst case PAL 1920 samples 8 channels */ 222 return -1; 223 av_new_packet(pkt, length); 224 get_buffer(pb, pkt->data, length); 225 data_ptr = pkt->data; 226 end_ptr = pkt->data + length; 227 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */ 228 for (; buf_ptr < end_ptr; ) { 229 for (i = 0; i < st->codec->channels; i++) { 230 uint32_t sample = bytestream_get_le32(&buf_ptr); 231 if (st->codec->bits_per_coded_sample == 24) 232 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff); 233 else 234 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff); 235 } 236 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M 237 } 238 pkt->size = data_ptr - pkt->data; 239 return 0; 240} 241 242static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv) 243{ 244 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b}; 245 MXFContext *mxf = s->priv_data; 246 ByteIOContext *pb = s->pb; 247 int64_t end = url_ftell(pb) + klv->length; 248 uint64_t size; 249 uint64_t orig_size; 250 uint64_t plaintext_size; 251 uint8_t ivec[16]; 252 uint8_t tmpbuf[16]; 253 int index; 254 255 if (!mxf->aesc && s->key && s->keylen == 16) { 256 mxf->aesc = av_malloc(av_aes_size); 257 if (!mxf->aesc) 258 return -1; 259 av_aes_init(mxf->aesc, s->key, 128, 1); 260 } 261 // crypto context 262 url_fskip(pb, klv_decode_ber_length(pb)); 263 // plaintext offset 264 klv_decode_ber_length(pb); 265 plaintext_size = get_be64(pb); 266 // source klv key 267 klv_decode_ber_length(pb); 268 get_buffer(pb, klv->key, 16); 269 if (!IS_KLV_KEY(klv, mxf_essence_element_key)) 270 return -1; 271 index = mxf_get_stream_index(s, klv); 272 if (index < 0) 273 return -1; 274 // source size 275 klv_decode_ber_length(pb); 276 orig_size = get_be64(pb); 277 if (orig_size < plaintext_size) 278 return -1; 279 // enc. code 280 size = klv_decode_ber_length(pb); 281 if (size < 32 || size - 32 < orig_size) 282 return -1; 283 get_buffer(pb, ivec, 16); 284 get_buffer(pb, tmpbuf, 16); 285 if (mxf->aesc) 286 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1); 287 if (memcmp(tmpbuf, checkv, 16)) 288 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n"); 289 size -= 32; 290 av_get_packet(pb, pkt, size); 291 size -= plaintext_size; 292 if (mxf->aesc) 293 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size], 294 &pkt->data[plaintext_size], size >> 4, ivec, 1); 295 pkt->size = orig_size; 296 pkt->stream_index = index; 297 url_fskip(pb, end - url_ftell(pb)); 298 return 0; 299} 300 301static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt) 302{ 303 KLVPacket klv; 304 305 while (!url_feof(s->pb)) { 306 if (klv_read_packet(&klv, s->pb) < 0) 307 return -1; 308 PRINT_KEY(s, "read packet", klv.key); 309 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset); 310 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) { 311 int res = mxf_decrypt_triplet(s, pkt, &klv); 312 if (res < 0) { 313 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n"); 314 return -1; 315 } 316 return 0; 317 } 318 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) { 319 int index = mxf_get_stream_index(s, &klv); 320 if (index < 0) { 321 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12)); 322 goto skip; 323 } 324 if (s->streams[index]->discard == AVDISCARD_ALL) 325 goto skip; 326 /* check for 8 channels AES3 element */ 327 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) { 328 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) { 329 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n"); 330 return -1; 331 } 332 } else 333 av_get_packet(s->pb, pkt, klv.length); 334 pkt->stream_index = index; 335 pkt->pos = klv.offset; 336 return 0; 337 } else 338 skip: 339 url_fskip(s->pb, klv.length); 340 } 341 return AVERROR_EOF; 342} 343 344static int mxf_read_primer_pack(MXFContext *mxf) 345{ 346 ByteIOContext *pb = mxf->fc->pb; 347 int item_num = get_be32(pb); 348 int item_len = get_be32(pb); 349 350 if (item_len != 18) { 351 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n"); 352 return -1; 353 } 354 if (item_num > UINT_MAX / item_len) 355 return -1; 356 mxf->local_tags_count = item_num; 357 mxf->local_tags = av_malloc(item_num*item_len); 358 if (!mxf->local_tags) 359 return -1; 360 get_buffer(pb, mxf->local_tags, item_num*item_len); 361 return 0; 362} 363 364static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set) 365{ 366 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets)) 367 return AVERROR(ENOMEM); 368 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets)); 369 if (!mxf->metadata_sets) 370 return -1; 371 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set; 372 mxf->metadata_sets_count++; 373 return 0; 374} 375 376static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid) 377{ 378 if (size != 16) 379 return -1; 380 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul)) 381 get_buffer(pb, cryptocontext->source_container_ul, 16); 382 return 0; 383} 384 385static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag) 386{ 387 switch (tag) { 388 case 0x1901: 389 mxf->packages_count = get_be32(pb); 390 if (mxf->packages_count >= UINT_MAX / sizeof(UID)) 391 return -1; 392 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID)); 393 if (!mxf->packages_refs) 394 return -1; 395 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 396 get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID)); 397 break; 398 } 399 return 0; 400} 401 402static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag) 403{ 404 switch(tag) { 405 case 0x0202: 406 source_clip->duration = get_be64(pb); 407 break; 408 case 0x1201: 409 source_clip->start_position = get_be64(pb); 410 break; 411 case 0x1101: 412 /* UMID, only get last 16 bytes */ 413 url_fskip(pb, 16); 414 get_buffer(pb, source_clip->source_package_uid, 16); 415 break; 416 case 0x1102: 417 source_clip->source_track_id = get_be32(pb); 418 break; 419 } 420 return 0; 421} 422 423static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag) 424{ 425 switch(tag) { 426 case 0x4403: 427 package->tracks_count = get_be32(pb); 428 if (package->tracks_count >= UINT_MAX / sizeof(UID)) 429 return -1; 430 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); 431 if (!package->tracks_refs) 432 return -1; 433 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 434 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); 435 break; 436 } 437 return 0; 438} 439 440static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag) 441{ 442 switch(tag) { 443 case 0x4801: 444 track->track_id = get_be32(pb); 445 break; 446 case 0x4804: 447 get_buffer(pb, track->track_number, 4); 448 break; 449 case 0x4B01: 450 track->edit_rate.den = get_be32(pb); 451 track->edit_rate.num = get_be32(pb); 452 break; 453 case 0x4803: 454 get_buffer(pb, track->sequence_ref, 16); 455 break; 456 } 457 return 0; 458} 459 460static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag) 461{ 462 switch(tag) { 463 case 0x0202: 464 sequence->duration = get_be64(pb); 465 break; 466 case 0x0201: 467 get_buffer(pb, sequence->data_definition_ul, 16); 468 break; 469 case 0x1001: 470 sequence->structural_components_count = get_be32(pb); 471 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID)) 472 return -1; 473 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID)); 474 if (!sequence->structural_components_refs) 475 return -1; 476 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 477 get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID)); 478 break; 479 } 480 return 0; 481} 482 483static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag) 484{ 485 switch(tag) { 486 case 0x4403: 487 package->tracks_count = get_be32(pb); 488 if (package->tracks_count >= UINT_MAX / sizeof(UID)) 489 return -1; 490 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID)); 491 if (!package->tracks_refs) 492 return -1; 493 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 494 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID)); 495 break; 496 case 0x4401: 497 /* UMID, only get last 16 bytes */ 498 url_fskip(pb, 16); 499 get_buffer(pb, package->package_uid, 16); 500 break; 501 case 0x4701: 502 get_buffer(pb, package->descriptor_ref, 16); 503 break; 504 } 505 return 0; 506} 507 508static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag) 509{ 510 switch(tag) { 511 case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break; 512 case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break; 513 case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break; 514 case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break; 515 case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break; 516 case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break; 517 } 518 return 0; 519} 520 521static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor) 522{ 523 int code; 524 525 do { 526 code = get_byte(pb); 527 dprintf(NULL, "pixel layout: code %#x\n", code); 528 switch (code) { 529 case 0x52: /* R */ 530 descriptor->bits_per_sample += get_byte(pb); 531 break; 532 case 0x47: /* G */ 533 descriptor->bits_per_sample += get_byte(pb); 534 break; 535 case 0x42: /* B */ 536 descriptor->bits_per_sample += get_byte(pb); 537 break; 538 default: 539 get_byte(pb); 540 } 541 } while (code != 0); /* SMPTE 377M E.2.46 */ 542} 543 544static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid) 545{ 546 switch(tag) { 547 case 0x3F01: 548 descriptor->sub_descriptors_count = get_be32(pb); 549 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID)) 550 return -1; 551 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID)); 552 if (!descriptor->sub_descriptors_refs) 553 return -1; 554 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */ 555 get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID)); 556 break; 557 case 0x3004: 558 get_buffer(pb, descriptor->essence_container_ul, 16); 559 break; 560 case 0x3006: 561 descriptor->linked_track_id = get_be32(pb); 562 break; 563 case 0x3201: /* PictureEssenceCoding */ 564 get_buffer(pb, descriptor->essence_codec_ul, 16); 565 break; 566 case 0x3203: 567 descriptor->width = get_be32(pb); 568 break; 569 case 0x3202: 570 descriptor->height = get_be32(pb); 571 break; 572 case 0x320E: 573 descriptor->aspect_ratio.num = get_be32(pb); 574 descriptor->aspect_ratio.den = get_be32(pb); 575 break; 576 case 0x3D03: 577 descriptor->sample_rate.num = get_be32(pb); 578 descriptor->sample_rate.den = get_be32(pb); 579 break; 580 case 0x3D06: /* SoundEssenceCompression */ 581 get_buffer(pb, descriptor->essence_codec_ul, 16); 582 break; 583 case 0x3D07: 584 descriptor->channels = get_be32(pb); 585 break; 586 case 0x3D01: 587 descriptor->bits_per_sample = get_be32(pb); 588 break; 589 case 0x3401: 590 mxf_read_pixel_layout(pb, descriptor); 591 break; 592 default: 593 /* Private uid used by SONY C0023S01.mxf */ 594 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) { 595 descriptor->extradata = av_malloc(size); 596 if (!descriptor->extradata) 597 return -1; 598 descriptor->extradata_size = size; 599 get_buffer(pb, descriptor->extradata, size); 600 } 601 break; 602 } 603 return 0; 604} 605 606/* 607 * Match an uid independently of the version byte and up to len common bytes 608 * Returns: boolean 609 */ 610static int mxf_match_uid(const UID key, const UID uid, int len) 611{ 612 int i; 613 for (i = 0; i < len; i++) { 614 if (i != 7 && key[i] != uid[i]) 615 return 0; 616 } 617 return 1; 618} 619 620static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid) 621{ 622 while (uls->uid[0]) { 623 if(mxf_match_uid(uls->uid, *uid, uls->matching_len)) 624 break; 625 uls++; 626 } 627 return uls; 628} 629 630static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type) 631{ 632 int i; 633 634 if (!strong_ref) 635 return NULL; 636 for (i = 0; i < mxf->metadata_sets_count; i++) { 637 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) && 638 (type == AnyType || mxf->metadata_sets[i]->type == type)) { 639 return mxf->metadata_sets[i]; 640 } 641 } 642 return NULL; 643} 644 645static const MXFCodecUL mxf_essence_container_uls[] = { 646 // video essence container uls 647 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */ 648 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */ 649 // sound essence container uls 650 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */ 651 { { 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 */ 652 { { 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 */ 653 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE }, 654}; 655 656static int mxf_parse_structural_metadata(MXFContext *mxf) 657{ 658 MXFPackage *material_package = NULL; 659 MXFPackage *temp_package = NULL; 660 int i, j, k; 661 662 dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count); 663 /* TODO: handle multiple material packages (OP3x) */ 664 for (i = 0; i < mxf->packages_count; i++) { 665 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage); 666 if (material_package) break; 667 } 668 if (!material_package) { 669 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n"); 670 return -1; 671 } 672 673 for (i = 0; i < material_package->tracks_count; i++) { 674 MXFPackage *source_package = NULL; 675 MXFTrack *material_track = NULL; 676 MXFTrack *source_track = NULL; 677 MXFTrack *temp_track = NULL; 678 MXFDescriptor *descriptor = NULL; 679 MXFStructuralComponent *component = NULL; 680 UID *essence_container_ul = NULL; 681 const MXFCodecUL *codec_ul = NULL; 682 const MXFCodecUL *container_ul = NULL; 683 AVStream *st; 684 685 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) { 686 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n"); 687 continue; 688 } 689 690 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) { 691 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n"); 692 continue; 693 } 694 695 /* TODO: handle multiple source clips */ 696 for (j = 0; j < material_track->sequence->structural_components_count; j++) { 697 /* TODO: handle timecode component */ 698 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip); 699 if (!component) 700 continue; 701 702 for (k = 0; k < mxf->packages_count; k++) { 703 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage); 704 if (!temp_package) 705 continue; 706 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) { 707 source_package = temp_package; 708 break; 709 } 710 } 711 if (!source_package) { 712 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id); 713 break; 714 } 715 for (k = 0; k < source_package->tracks_count; k++) { 716 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) { 717 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n"); 718 return -1; 719 } 720 if (temp_track->track_id == component->source_track_id) { 721 source_track = temp_track; 722 break; 723 } 724 } 725 if (!source_track) { 726 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id); 727 break; 728 } 729 } 730 if (!source_track) 731 continue; 732 733 st = av_new_stream(mxf->fc, source_track->track_id); 734 if (!st) { 735 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n"); 736 return -1; 737 } 738 st->priv_data = source_track; 739 st->duration = component->duration; 740 if (st->duration == -1) 741 st->duration = AV_NOPTS_VALUE; 742 st->start_time = component->start_position; 743 av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den); 744 745 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) { 746 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n"); 747 return -1; 748 } 749 750 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul); 751 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul); 752 st->codec->codec_type = codec_ul->id; 753 754 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType); 755 if (source_package->descriptor) { 756 if (source_package->descriptor->type == MultipleDescriptor) { 757 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) { 758 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor); 759 760 if (!sub_descriptor) { 761 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n"); 762 continue; 763 } 764 if (sub_descriptor->linked_track_id == source_track->track_id) { 765 descriptor = sub_descriptor; 766 break; 767 } 768 } 769 } else if (source_package->descriptor->type == Descriptor) 770 descriptor = source_package->descriptor; 771 } 772 if (!descriptor) { 773 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index); 774 continue; 775 } 776 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul); 777 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul); 778 essence_container_ul = &descriptor->essence_container_ul; 779 /* HACK: replacing the original key with mxf_encrypted_essence_container 780 * is not allowed according to s429-6, try to find correct information anyway */ 781 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) { 782 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n"); 783 for (k = 0; k < mxf->metadata_sets_count; k++) { 784 MXFMetadataSet *metadata = mxf->metadata_sets[k]; 785 if (metadata->type == CryptoContext) { 786 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul; 787 break; 788 } 789 } 790 } 791 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */ 792 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul); 793 st->codec->codec_id = codec_ul->id; 794 if (descriptor->extradata) { 795 st->codec->extradata = descriptor->extradata; 796 st->codec->extradata_size = descriptor->extradata_size; 797 } 798 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { 799 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); 800 if (st->codec->codec_id == CODEC_ID_NONE) 801 st->codec->codec_id = container_ul->id; 802 st->codec->width = descriptor->width; 803 st->codec->height = descriptor->height; 804 st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */ 805 st->need_parsing = AVSTREAM_PARSE_HEADERS; 806 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { 807 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul); 808 if (st->codec->codec_id == CODEC_ID_NONE) 809 st->codec->codec_id = container_ul->id; 810 st->codec->channels = descriptor->channels; 811 st->codec->bits_per_coded_sample = descriptor->bits_per_sample; 812 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den; 813 /* TODO: implement CODEC_ID_RAWAUDIO */ 814 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) { 815 if (descriptor->bits_per_sample == 24) 816 st->codec->codec_id = CODEC_ID_PCM_S24LE; 817 else if (descriptor->bits_per_sample == 32) 818 st->codec->codec_id = CODEC_ID_PCM_S32LE; 819 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) { 820 if (descriptor->bits_per_sample == 24) 821 st->codec->codec_id = CODEC_ID_PCM_S24BE; 822 else if (descriptor->bits_per_sample == 32) 823 st->codec->codec_id = CODEC_ID_PCM_S32BE; 824 } else if (st->codec->codec_id == CODEC_ID_MP2) { 825 st->need_parsing = AVSTREAM_PARSE_FULL; 826 } 827 } 828 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) { 829 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n"); 830 st->need_parsing = AVSTREAM_PARSE_FULL; 831 } 832 } 833 return 0; 834} 835 836static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = { 837 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack }, 838 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType }, 839 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage }, 840 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage }, 841 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence }, 842 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip }, 843 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor }, 844 { { 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 */ 845 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */ 846 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */ 847 { { 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 */ 848 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */ 849 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */ 850 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */ 851 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */ 852 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext }, 853 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment }, 854 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType }, 855}; 856 857static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type) 858{ 859 ByteIOContext *pb = mxf->fc->pb; 860 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf; 861 uint64_t klv_end = url_ftell(pb) + klv->length; 862 863 if (!ctx) 864 return -1; 865 while (url_ftell(pb) + 4 < klv_end) { 866 int tag = get_be16(pb); 867 int size = get_be16(pb); /* KLV specified by 0x53 */ 868 uint64_t next = url_ftell(pb) + size; 869 UID uid = {0}; 870 871 dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size); 872 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */ 873 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag); 874 continue; 875 } 876 if (tag > 0x7FFF) { /* dynamic tag */ 877 int i; 878 for (i = 0; i < mxf->local_tags_count; i++) { 879 int local_tag = AV_RB16(mxf->local_tags+i*18); 880 if (local_tag == tag) { 881 memcpy(uid, mxf->local_tags+i*18+2, 16); 882 dprintf(mxf->fc, "local tag %#04x\n", local_tag); 883 PRINT_KEY(mxf->fc, "uid", uid); 884 } 885 } 886 } 887 if (ctx_size && tag == 0x3C0A) 888 get_buffer(pb, ctx->uid, 16); 889 else if (read_child(ctx, pb, tag, size, uid) < 0) 890 return -1; 891 892 url_fseek(pb, next, SEEK_SET); 893 } 894 if (ctx_size) ctx->type = type; 895 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0; 896} 897 898static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap) 899{ 900 MXFContext *mxf = s->priv_data; 901 KLVPacket klv; 902 903 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) { 904 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n"); 905 return -1; 906 } 907 url_fseek(s->pb, -14, SEEK_CUR); 908 mxf->fc = s; 909 while (!url_feof(s->pb)) { 910 const MXFMetadataReadTableEntry *metadata; 911 912 if (klv_read_packet(&klv, s->pb) < 0) 913 return -1; 914 PRINT_KEY(s, "read header", klv.key); 915 dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset); 916 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) || 917 IS_KLV_KEY(klv.key, mxf_essence_element_key)) { 918 /* FIXME avoid seek */ 919 url_fseek(s->pb, klv.offset, SEEK_SET); 920 break; 921 } 922 923 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) { 924 if (IS_KLV_KEY(klv.key, metadata->key)) { 925 int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read; 926 if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) { 927 av_log(s, AV_LOG_ERROR, "error reading header metadata\n"); 928 return -1; 929 } 930 break; 931 } 932 } 933 if (!metadata->read) 934 url_fskip(s->pb, klv.length); 935 } 936 return mxf_parse_structural_metadata(mxf); 937} 938 939static int mxf_read_close(AVFormatContext *s) 940{ 941 MXFContext *mxf = s->priv_data; 942 int i; 943 944 av_freep(&mxf->packages_refs); 945 946 for (i = 0; i < s->nb_streams; i++) 947 s->streams[i]->priv_data = NULL; 948 949 for (i = 0; i < mxf->metadata_sets_count; i++) { 950 switch (mxf->metadata_sets[i]->type) { 951 case MultipleDescriptor: 952 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs); 953 break; 954 case Sequence: 955 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs); 956 break; 957 case SourcePackage: 958 case MaterialPackage: 959 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs); 960 break; 961 default: 962 break; 963 } 964 av_freep(&mxf->metadata_sets[i]); 965 } 966 av_freep(&mxf->metadata_sets); 967 av_freep(&mxf->aesc); 968 av_freep(&mxf->local_tags); 969 return 0; 970} 971 972static int mxf_probe(AVProbeData *p) { 973 uint8_t *bufp = p->buf; 974 uint8_t *end = p->buf + p->buf_size; 975 976 if (p->buf_size < sizeof(mxf_header_partition_pack_key)) 977 return 0; 978 979 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */ 980 end -= sizeof(mxf_header_partition_pack_key); 981 for (; bufp < end; bufp++) { 982 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key)) 983 return AVPROBE_SCORE_MAX; 984 } 985 return 0; 986} 987 988/* rudimentary byte seek */ 989/* XXX: use MXF Index */ 990static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags) 991{ 992 AVStream *st = s->streams[stream_index]; 993 int64_t seconds; 994 995 if (!s->bit_rate) 996 return -1; 997 if (sample_time < 0) 998 sample_time = 0; 999 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den); 1000 url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET); 1001 av_update_cur_dts(s, st, sample_time); 1002 return 0; 1003} 1004 1005AVInputFormat mxf_demuxer = { 1006 "mxf", 1007 NULL_IF_CONFIG_SMALL("Material eXchange Format"), 1008 sizeof(MXFContext), 1009 mxf_probe, 1010 mxf_read_header, 1011 mxf_read_packet, 1012 mxf_read_close, 1013 mxf_read_seek, 1014}; 1015