libavformat/mxf.c

   1 /*
   2  * MXF demuxer.
   3  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 /*
  21  * References
  22  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
  23  * SMPTE 377M MXF File Format Specifications
  24  * SMPTE 378M Operational Pattern 1a
  25  * SMPTE 379M MXF Generic Container
  26  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
  27  * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
  28  * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
  29  *
  30  * Principle
  31  * Search for Track numbers which will identify essence element KLV packets.
  32  * Search for SourcePackage which define tracks which contains Track numbers.
  33  * Material Package contains tracks with reference to SourcePackage tracks.
  34  * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
  35  * Assign Descriptors to correct Tracks.
  36  *
  37  * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
  38  * Metadata parsing resolves Strong References to objects.
  39  *
  40  * Simple demuxer, only OP1A supported and some files might not work at all.
  41  * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
  42  */
  43
  44 //#define DEBUG
  45
  46 #include "avformat.h"
  47
  48 typedef uint8_t UID[16];
  49
  50 enum MXFMetadataSetType {
  51     MaterialPackage,
  52     SourcePackage,
  53     SourceClip,
  54     TimecodeComponent,
  55     Sequence,
  56     MultipleDescriptor,
  57     Descriptor,
  58     Track,
  59     EssenceContainerData,
  60 };
  61
  62 typedef struct MXFStructuralComponent {
  63     UID uid;
  64     enum MXFMetadataSetType type;
  65     UID source_package_uid;
  66     UID data_definition_ul;
  67     int64_t duration;
  68     int64_t start_position;
  69     int source_track_id;
  70 } MXFStructuralComponent;
  71
  72 typedef struct MXFSequence {
  73     UID uid;
  74     enum MXFMetadataSetType type;
  75     UID data_definition_ul;
  76     UID *structural_components_refs;
  77     int structural_components_count;
  78     int64_t duration;
  79 } MXFSequence;
  80
  81 typedef struct MXFTrack {
  82     UID uid;
  83     enum MXFMetadataSetType type;
  84     MXFSequence *sequence; /* mandatory, and only one */
  85     UID sequence_ref;
  86     int track_id;
  87     uint8_t track_number[4];
  88     AVRational edit_rate;
  89 } MXFTrack;
  90
  91 typedef struct MXFDescriptor {
  92     UID uid;
  93     enum MXFMetadataSetType type;
  94     UID essence_container_ul;
  95     UID essence_codec_ul;
  96     AVRational sample_rate;
  97     AVRational aspect_ratio;
  98     int width;
  99     int height;
 100     int channels;
 101     int bits_per_sample;
 102     UID *sub_descriptors_refs;
 103     int sub_descriptors_count;
 104     int linked_track_id;
 105     uint8_t *extradata;
 106     int extradata_size;
 107 } MXFDescriptor;
 108
 109 typedef struct MXFPackage {
 110     UID uid;
 111     enum MXFMetadataSetType type;
 112     UID package_uid;
 113     UID *tracks_refs;
 114     int tracks_count;
 115     MXFDescriptor *descriptor; /* only one */
 116     UID descriptor_ref;
 117 } MXFPackage;
 118
 119 typedef struct MXFEssenceContainerData {
 120     UID uid;
 121     enum MXFMetadataSetType type;
 122     UID linked_package_uid;
 123 } MXFEssenceContainerData;
 124
 125 typedef struct {
 126     UID uid;
 127     enum MXFMetadataSetType type;
 128 } MXFMetadataSet;
 129
 130 typedef struct MXFContext {
 131     UID *packages_refs;
 132     int packages_count;
 133     UID *essence_container_data_sets_refs;
 134     int essence_container_data_sets_count;
 135     UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
 136     int essence_containers_uls_count;
 137     UID operational_pattern_ul;
 138     UID content_storage_uid;
 139     MXFMetadataSet **metadata_sets;
 140     int metadata_sets_count;
 141     AVFormatContext *fc;
 142 } MXFContext;
 143
 144 typedef struct KLVPacket {
 145     UID key;
 146     offset_t offset;
 147     uint64_t length;
 148 } KLVPacket;
 149
 150 enum MXFWrappingScheme {
 151     Frame,
 152     Clip,
 153 };
 154
 155 typedef struct MXFCodecUL {
 156     UID uid;
 157     enum CodecID id;
 158     enum MXFWrappingScheme wrapping;
 159 } MXFCodecUL;
 160
 161 typedef struct MXFMetadataReadTableEntry {
 162     const UID key;
 163     int (*read)(MXFContext *mxf, KLVPacket *klv);
 164 } MXFMetadataReadTableEntry;
 165
 166 /* partial keys to match */
 167 static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
 168 static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
 169
 170 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
 171
 172 #define PRINT_KEY(x) dprintf("%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", \
 173                              (x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])
 174
 175 static int64_t klv_decode_ber_length(ByteIOContext *pb)
 176 {
 177     int64_t size = 0;
 178     uint8_t length = get_byte(pb);
 179     int type = length >> 7;
 180
 181     if (type) { /* long form */
 182         int bytes_num = length & 0x7f;
 183         /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
 184         if (bytes_num > 8)
 185             return -1;
 186         while (bytes_num--)
 187             size = size << 8 | get_byte(pb);
 188     } else {
 189         size = length & 0x7f;
 190     }
 191     return size;
 192 }
 193
 194 static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
 195 {
 196     klv->offset = url_ftell(pb);
 197     get_buffer(pb, klv->key, 16);
 198     klv->length = klv_decode_ber_length(pb);
 199     return klv->length == -1 ? -1 : 0;
 200 }
 201
 202 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
 203 {
 204     int i;
 205
 206     for (i = 0; i < s->nb_streams; i++) {
 207         MXFTrack *track = s->streams[i]->priv_data;
 208          /* SMPTE 379M 7.3 */
 209         if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
 210             return i;
 211     }
 212     return -1;
 213 }
 214
 215 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
 216 {
 217     KLVPacket klv;
 218
 219     while (!url_feof(&s->pb)) {
 220         if (klv_read_packet(&klv, &s->pb) < 0) {
 221             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
 222             return -1;
 223         }
 224 #ifdef DEBUG
 225         PRINT_KEY(klv.key);
 226 #endif
 227         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
 228             av_get_packet(&s->pb, pkt, klv.length);
 229             pkt->stream_index = mxf_get_stream_index(s, &klv);
 230             return pkt->stream_index == -1 ? -1 : 0;
 231         } else
 232             url_fskip(&s->pb, klv.length);
 233     }
 234     return AVERROR_IO;
 235 }
 236
 237 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
 238 {
 239     mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
 240     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
 241     mxf->metadata_sets_count++;
 242     return 0;
 243 }
 244
 245 static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
 246 {
 247     ByteIOContext *pb = &mxf->fc->pb;
 248     int bytes_read = 0;
 249
 250     while (bytes_read < klv->length) {
 251         int tag = get_be16(pb);
 252         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
 253
 254         switch (tag) {
 255         case 0x3B03:
 256             get_buffer(pb, mxf->content_storage_uid, 16);
 257             break;
 258         case 0x3B09:
 259             get_buffer(pb, mxf->operational_pattern_ul, 16);
 260             break;
 261         case 0x3B0A:
 262             mxf->essence_containers_uls_count = get_be32(pb);
 263             if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
 264                 return -1;
 265             mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
 266             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 267             get_buffer(pb, mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
 268             break;
 269         default:
 270             url_fskip(pb, size);
 271         }
 272         bytes_read += size + 4;
 273     }
 274     return 0;
 275 }
 276
 277 static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
 278 {
 279     ByteIOContext *pb = &mxf->fc->pb;
 280     int bytes_read = 0;
 281
 282     while (bytes_read < klv->length) {
 283         int tag = get_be16(pb);
 284         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
 285
 286         dprintf("tag 0x%04X, size %d\n", tag, size);
 287         switch (tag) {
 288         case 0x1901:
 289             mxf->packages_count = get_be32(pb);
 290             if (mxf->packages_count >= UINT_MAX / sizeof(UID))
 291                 return -1;
 292             mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
 293             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 294             get_buffer(pb, mxf->packages_refs, mxf->packages_count * sizeof(UID));
 295             break;
 296         case 0x1902:
 297             mxf->essence_container_data_sets_count = get_be32(pb);
 298             if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
 299                 return -1;
 300             mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
 301             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 302             get_buffer(pb, mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
 303             break;
 304         default:
 305             url_fskip(pb, size);
 306         }
 307         bytes_read += size + 4;
 308     }
 309     return 0;
 310 }
 311
 312 static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
 313 {
 314     ByteIOContext *pb = &mxf->fc->pb;
 315     MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
 316     int bytes_read = 0;
 317
 318     while (bytes_read < klv->length) {
 319         int tag = get_be16(pb);
 320         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
 321
 322         bytes_read += size + 4;
 323         dprintf("tag 0x%04X, size %d\n", tag, size);
 324         if (!size) /* ignore empty tag, needed for some files with empty UMID tag */
 325             continue;
 326         switch (tag) {
 327         case 0x3C0A:
 328             get_buffer(pb, source_clip->uid, 16);
 329             break;
 330         case 0x0202:
 331             source_clip->duration = get_be64(pb);
 332             break;
 333         case 0x1201:
 334             source_clip->start_position = get_be64(pb);
 335             break;
 336         case 0x1101:
 337             /* UMID, only get last 16 bytes */
 338             url_fskip(pb, 16);
 339             get_buffer(pb, source_clip->source_package_uid, 16);
 340             break;
 341         case 0x1102:
 342             source_clip->source_track_id = get_be32(pb);
 343             break;
 344         default:
 345             url_fskip(pb, size);
 346         }
 347     }
 348     source_clip->type = SourceClip;
 349     return mxf_add_metadata_set(mxf, source_clip);
 350 }
 351
 352 static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
 353 {
 354     ByteIOContext *pb = &mxf->fc->pb;
 355     MXFPackage *package = av_mallocz(sizeof(*package));
 356     int bytes_read = 0;
 357
 358     while (bytes_read < klv->length) {
 359         int tag = get_be16(pb);
 360         int size = get_be16(pb); /* KLV specified by 0x53 */
 361
 362         switch (tag) {
 363         case 0x3C0A:
 364             get_buffer(pb, package->uid, 16);
 365             break;
 366         case 0x4403:
 367             package->tracks_count = get_be32(pb);
 368             if (package->tracks_count >= UINT_MAX / sizeof(UID))
 369                 return -1;
 370             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
 371             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 372             get_buffer(pb, package->tracks_refs, package->tracks_count * sizeof(UID));
 373             break;
 374         default:
 375             url_fskip(pb, size);
 376         }
 377         bytes_read += size + 4;
 378     }
 379     package->type = MaterialPackage;
 380     return mxf_add_metadata_set(mxf, package);
 381 }
 382
 383 static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
 384 {
 385     ByteIOContext *pb = &mxf->fc->pb;
 386     MXFTrack *track = av_mallocz(sizeof(*track));
 387     int bytes_read = 0;
 388
 389     while (bytes_read < klv->length) {
 390         int tag = get_be16(pb);
 391         int size = get_be16(pb); /* KLV specified by 0x53 */
 392
 393         dprintf("tag 0x%04X, size %d\n", tag, size);
 394         switch (tag) {
 395         case 0x3C0A:
 396             get_buffer(pb, track->uid, 16);
 397             break;
 398         case 0x4801:
 399             track->track_id = get_be32(pb);
 400             break;
 401         case 0x4804:
 402             get_buffer(pb, track->track_number, 4);
 403             break;
 404         case 0x4B01:
 405             track->edit_rate.den = get_be32(pb);
 406             track->edit_rate.num = get_be32(pb);
 407             break;
 408         case 0x4803:
 409             get_buffer(pb, track->sequence_ref, 16);
 410             break;
 411         default:
 412             url_fskip(pb, size);
 413         }
 414         bytes_read += size + 4;
 415     }
 416     track->type = Track;
 417     return mxf_add_metadata_set(mxf, track);
 418 }
 419
 420 static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
 421 {
 422     ByteIOContext *pb = &mxf->fc->pb;
 423     MXFSequence *sequence = av_mallocz(sizeof(*sequence));
 424     int bytes_read = 0;
 425
 426     while (bytes_read < klv->length) {
 427         int tag = get_be16(pb);
 428         int size = get_be16(pb); /* KLV specified by 0x53 */
 429
 430         dprintf("tag 0x%04X, size %d\n", tag, size);
 431         switch (tag) {
 432         case 0x3C0A:
 433             get_buffer(pb, sequence->uid, 16);
 434             break;
 435         case 0x0202:
 436             sequence->duration = get_be64(pb);
 437             break;
 438         case 0x0201:
 439             get_buffer(pb, sequence->data_definition_ul, 16);
 440             break;
 441         case 0x1001:
 442             sequence->structural_components_count = get_be32(pb);
 443             if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
 444                 return -1;
 445             sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
 446             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 447             get_buffer(pb, sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
 448             break;
 449         default:
 450             url_fskip(pb, size);
 451         }
 452         bytes_read += size + 4;
 453     }
 454     sequence->type = Sequence;
 455     return mxf_add_metadata_set(mxf, sequence);
 456 }
 457
 458 static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
 459 {
 460     ByteIOContext *pb = &mxf->fc->pb;
 461     MXFPackage *package = av_mallocz(sizeof(*package));
 462     int bytes_read = 0;
 463
 464     while (bytes_read < klv->length) {
 465         int tag = get_be16(pb);
 466         int size = get_be16(pb); /* KLV specified by 0x53 */
 467
 468         dprintf("tag 0x%04X, size %d\n", tag, size);
 469         switch (tag) {
 470         case 0x3C0A:
 471             get_buffer(pb, package->uid, 16);
 472             break;
 473         case 0x4403:
 474             package->tracks_count = get_be32(pb);
 475             if (package->tracks_count >= UINT_MAX / sizeof(UID))
 476                 return -1;
 477             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
 478             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 479             get_buffer(pb, package->tracks_refs, package->tracks_count * sizeof(UID));
 480             break;
 481         case 0x4401:
 482             /* UMID, only get last 16 bytes */
 483             url_fskip(pb, 16);
 484             get_buffer(pb, package->package_uid, 16);
 485             break;
 486         case 0x4701:
 487             get_buffer(pb, package->descriptor_ref, 16);
 488             break;
 489         default:
 490             url_fskip(pb, size);
 491         }
 492         bytes_read += size + 4;
 493     }
 494     package->type = SourcePackage;
 495     return mxf_add_metadata_set(mxf, package);
 496 }
 497
 498 static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
 499 {
 500     ByteIOContext *pb = &mxf->fc->pb;
 501     MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
 502     int bytes_read = 0;
 503
 504     while (bytes_read < klv->length) {
 505         int tag = get_be16(pb);
 506         int size = get_be16(pb); /* KLV specified by 0x53 */
 507
 508         dprintf("tag 0x%04X, size %d\n", tag, size);
 509         switch (tag) {
 510         case 0x3C0A:
 511             get_buffer(pb, descriptor->uid, 16);
 512             break;
 513         case 0x3F01:
 514             descriptor->sub_descriptors_count = get_be32(pb);
 515             if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
 516                 return -1;
 517             descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
 518             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
 519             get_buffer(pb, descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
 520             break;
 521         default:
 522             url_fskip(pb, size);
 523         }
 524         bytes_read += size + 4;
 525     }
 526     descriptor->type = MultipleDescriptor;
 527     return mxf_add_metadata_set(mxf, descriptor);
 528 }
 529
 530 static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
 531 {
 532     int code;
 533
 534     do {
 535         code = get_byte(pb);
 536         dprintf("pixel layout: code 0x%x\n", code);
 537         switch (code) {
 538         case 0x52: /* R */
 539             descriptor->bits_per_sample += get_byte(pb);
 540             break;
 541         case 0x47: /* G */
 542             descriptor->bits_per_sample += get_byte(pb);
 543             break;
 544         case 0x42: /* B */
 545             descriptor->bits_per_sample += get_byte(pb);
 546             break;
 547         default:
 548             get_byte(pb);
 549         }
 550     } while (code != 0); /* SMPTE 377M E.2.46 */
 551 }
 552
 553 static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
 554 {
 555     ByteIOContext *pb = &mxf->fc->pb;
 556     MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
 557     int bytes_read = 0;
 558
 559     while (bytes_read < klv->length) {
 560         int tag = get_be16(pb);
 561         int size = get_be16(pb); /* KLV specified by 0x53 */
 562
 563         dprintf("tag 0x%04X, size %d\n", tag, size);
 564         switch (tag) {
 565         case 0x3C0A:
 566             get_buffer(pb, descriptor->uid, 16);
 567             break;
 568         case 0x3004:
 569             get_buffer(pb, descriptor->essence_container_ul, 16);
 570             break;
 571         case 0x3006:
 572             descriptor->linked_track_id = get_be32(pb);
 573             break;
 574         case 0x3201: /* PictureEssenceCoding */
 575             get_buffer(pb, descriptor->essence_codec_ul, 16);
 576             break;
 577         case 0x3203:
 578             descriptor->width = get_be32(pb);
 579             break;
 580         case 0x3202:
 581             descriptor->height = get_be32(pb);
 582             break;
 583         case 0x320E:
 584             descriptor->aspect_ratio.num = get_be32(pb);
 585             descriptor->aspect_ratio.den = get_be32(pb);
 586             break;
 587         case 0x3D03:
 588             descriptor->sample_rate.num = get_be32(pb);
 589             descriptor->sample_rate.den = get_be32(pb);
 590             break;
 591         case 0x3D06: /* SoundEssenceCompression */
 592             get_buffer(pb, descriptor->essence_codec_ul, 16);
 593             break;
 594         case 0x3D07:
 595             descriptor->channels = get_be32(pb);
 596             break;
 597         case 0x3D01:
 598             descriptor->bits_per_sample = get_be32(pb);
 599             break;
 600         case 0x3401:
 601             mxf_read_metadata_pixel_layout(pb, descriptor);
 602             break;
 603         case 0x8201: /* Private tag used by SONY C0023S01.mxf */
 604             descriptor->extradata = av_malloc(size);
 605             descriptor->extradata_size = size;
 606             get_buffer(pb, descriptor->extradata, size);
 607             break;
 608         default:
 609             url_fskip(pb, size);
 610         }
 611         bytes_read += size + 4;
 612     }
 613     descriptor->type = Descriptor;
 614     return mxf_add_metadata_set(mxf, descriptor);
 615 }
 616
 617 /* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
 618 static const UID picture_essence_track_ul = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 };
 619 static const UID sound_essence_track_ul   = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 };
 620
 621 static const MXFCodecUL mxf_codec_uls[] = {
 622     /* PictureEssenceCoding */
 623     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
 624     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
 625     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
 626     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
 627     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
 628     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
 629     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
 630     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
 631     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
 632     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
 633     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
 634     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
 635     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
 636     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
 637     /* SoundEssenceCompression */
 638     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
 639     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
 640     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 },  CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
 641     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
 642     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */
 643     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
 644     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
 645   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
 646     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
 647 };
 648
 649 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
 650     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
 651     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
 652     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
 653     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
 654 };
 655
 656 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
 657     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
 658     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
 659     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
 660     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
 661     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 },        CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
 662   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },   CODEC_ID_PCM_AES3, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
 663     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
 664 };
 665
 666 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
 667 {
 668     while (uls->id != CODEC_ID_NONE) {
 669         if(!memcmp(uls->uid, *uid, 16))
 670             break;
 671         uls++;
 672     }
 673     return uls;
 674 }
 675
 676 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref)
 677 {
 678     int i;
 679
 680     if (!strong_ref)
 681         return NULL;
 682     for (i = 0; i < mxf->metadata_sets_count; i++) {
 683         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16)) {
 684             return mxf->metadata_sets[i];
 685         }
 686     }
 687     return NULL;
 688 }
 689
 690 static int mxf_parse_structural_metadata(MXFContext *mxf)
 691 {
 692     MXFPackage *material_package = NULL;
 693     MXFPackage *source_package = NULL;
 694     MXFPackage *temp_package = NULL;
 695     int i, j, k;
 696
 697     dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
 698     /* TODO: handle multiple material packages (OP3x) */
 699     for (i = 0; i < mxf->packages_count; i++) {
 700         if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i]))) {
 701             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve package strong ref\n");
 702             return -1;
 703         }
 704         if (temp_package->type == MaterialPackage) {
 705             material_package = temp_package;
 706             break;
 707         }
 708     }
 709     if (!material_package) {
 710         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
 711         return -1;
 712     }
 713
 714     for (i = 0; i < material_package->tracks_count; i++) {
 715         MXFTrack *material_track = NULL;
 716         MXFTrack *source_track = NULL;
 717         MXFTrack *temp_track = NULL;
 718         MXFDescriptor *descriptor = NULL;
 719         MXFStructuralComponent *component = NULL;
 720         const MXFCodecUL *codec_ul = NULL;
 721         const MXFCodecUL *container_ul = NULL;
 722         AVStream *st;
 723
 724         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i]))) {
 725             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
 726             continue;
 727         }
 728
 729         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref))) {
 730             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
 731             return -1;
 732         }
 733
 734         /* TODO: handle multiple source clips */
 735         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
 736             /* TODO: handle timecode component */
 737             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j]);
 738             if (!component || component->type != SourceClip)
 739                 continue;
 740
 741             for (k = 0; k < mxf->packages_count; k++) {
 742                 if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k]))) {
 743                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
 744                     return -1;
 745                 }
 746                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
 747                     source_package = temp_package;
 748                     break;
 749                 }
 750             }
 751             if (!source_package) {
 752                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
 753                 break;
 754             }
 755             for (k = 0; k < source_package->tracks_count; k++) {
 756                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k]))) {
 757                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
 758                     return -1;
 759                 }
 760                 if (temp_track->track_id == component->source_track_id) {
 761                     source_track = temp_track;
 762                     break;
 763                 }
 764             }
 765             if (!source_track) {
 766                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
 767                 break;
 768             }
 769         }
 770         if (!source_track)
 771             continue;
 772
 773         st = av_new_stream(mxf->fc, source_track->track_id);
 774         st->priv_data = source_track;
 775         st->duration = component->duration;
 776         if (st->duration == -1)
 777             st->duration = AV_NOPTS_VALUE;
 778         st->start_time = component->start_position;
 779         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
 780
 781         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref))) {
 782             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
 783             return -1;
 784         }
 785
 786 #ifdef DEBUG
 787         PRINT_KEY(source_track->sequence->data_definition_ul);
 788 #endif
 789         if (!memcmp(source_track->sequence->data_definition_ul, picture_essence_track_ul, 16))
 790             st->codec->codec_type = CODEC_TYPE_VIDEO;
 791         else if (!memcmp(source_track->sequence->data_definition_ul, sound_essence_track_ul, 16))
 792             st->codec->codec_type = CODEC_TYPE_AUDIO;
 793         else
 794             st->codec->codec_type = CODEC_TYPE_DATA;
 795
 796         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref);
 797         if (source_package->descriptor) {
 798             if (source_package->descriptor->type == MultipleDescriptor) {
 799                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
 800                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j]);
 801
 802                     if (!sub_descriptor) {
 803                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
 804                         continue;
 805                     }
 806                     if (sub_descriptor->linked_track_id == source_track->track_id) {
 807                         descriptor = sub_descriptor;
 808                         break;
 809                     }
 810                 }
 811             } else
 812                 descriptor = source_package->descriptor;
 813         }
 814         if (!descriptor) {
 815             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
 816             continue;
 817         }
 818 #ifdef DEBUG
 819         PRINT_KEY(descriptor->essence_codec_ul);
 820         PRINT_KEY(descriptor->essence_container_ul);
 821 #endif
 822         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
 823         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
 824         st->codec->codec_id = codec_ul->id;
 825         if (descriptor->extradata) {
 826             st->codec->extradata = descriptor->extradata;
 827             st->codec->extradata_size = descriptor->extradata_size;
 828         }
 829         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
 830             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
 831             if (st->codec->codec_id == CODEC_ID_NONE)
 832                 st->codec->codec_id = container_ul->id;
 833             st->codec->width = descriptor->width;
 834             st->codec->height = descriptor->height;
 835             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
 836         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
 837             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
 838             if (st->codec->codec_id == CODEC_ID_NONE)
 839                 st->codec->codec_id = container_ul->id;
 840             st->codec->channels = descriptor->channels;
 841             st->codec->bits_per_sample = descriptor->bits_per_sample;
 842             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
 843             /* TODO: implement CODEC_ID_RAWAUDIO */
 844             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
 845                 if (descriptor->bits_per_sample == 24)
 846                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
 847                 else if (descriptor->bits_per_sample == 32)
 848                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
 849             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
 850                 if (descriptor->bits_per_sample == 24)
 851                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
 852                 else if (descriptor->bits_per_sample == 32)
 853                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
 854             }
 855         }
 856         if (container_ul && container_ul->wrapping == Clip) {
 857             dprintf("stream %d: clip wrapped essence\n", st->index);
 858             st->need_parsing = 1;
 859         }
 860     }
 861     return 0;
 862 }
 863
 864 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
 865     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
 866     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
 867     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
 868     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
 869     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
 870     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
 871     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
 872     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
 873     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
 874     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
 875     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
 876     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
 877     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
 878     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
 879     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
 880     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
 881 };
 882
 883 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
 884 {
 885     MXFContext *mxf = s->priv_data;
 886     KLVPacket klv;
 887
 888     mxf->fc = s;
 889     while (!url_feof(&s->pb)) {
 890         const MXFMetadataReadTableEntry *function;
 891
 892         if (klv_read_packet(&klv, &s->pb) < 0) {
 893             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
 894             return -1;
 895         }
 896 #ifdef DEBUG
 897         PRINT_KEY(klv.key);
 898 #endif
 899         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
 900             /* FIXME avoid seek */
 901             url_fseek(&s->pb, klv.offset, SEEK_SET);
 902             break;
 903         }
 904
 905         for (function = mxf_metadata_read_table; function->read; function++) {
 906             if (IS_KLV_KEY(klv.key, function->key)) {
 907                 if (function->read(mxf, &klv) < 0) {
 908                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
 909                     return -1;
 910                 }
 911                 break;
 912             }
 913         }
 914         if (!function->read)
 915             url_fskip(&s->pb, klv.length);
 916     }
 917     return mxf_parse_structural_metadata(mxf);
 918 }
 919
 920 static int mxf_read_close(AVFormatContext *s)
 921 {
 922     MXFContext *mxf = s->priv_data;
 923     int i;
 924
 925     av_freep(&mxf->packages_refs);
 926     av_freep(&mxf->essence_container_data_sets_refs);
 927     av_freep(&mxf->essence_containers_uls);
 928     for (i = 0; i < mxf->metadata_sets_count; i++) {
 929         switch (mxf->metadata_sets[i]->type) {
 930         case MultipleDescriptor:
 931             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
 932             break;
 933         case Sequence:
 934             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
 935             break;
 936         case SourcePackage:
 937         case MaterialPackage:
 938             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
 939             break;
 940         default:
 941             break;
 942         }
 943         av_freep(&mxf->metadata_sets[i]);
 944     }
 945     av_freep(&mxf->metadata_sets);
 946     return 0;
 947 }
 948
 949 static int mxf_probe(AVProbeData *p) {
 950     uint8_t *bufp = p->buf;
 951     uint8_t *end = p->buf + p->buf_size;
 952
 953     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
 954         return 0;
 955
 956     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
 957     end -= sizeof(mxf_header_partition_pack_key);
 958     for (; bufp < end; bufp++) {
 959         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
 960             return AVPROBE_SCORE_MAX;
 961     }
 962     return 0;
 963 }
 964
 965
 966 AVInputFormat mxf_demuxer = {
 967     "mxf",
 968     "MXF format",
 969     sizeof(MXFContext),
 970     mxf_probe,
 971     mxf_read_header,
 972     mxf_read_packet,
 973     mxf_read_close,
 974     NULL,
 975 };