3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
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.
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.
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
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
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.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
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
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
77 MXFPartitionType type;
78 uint64_t previous_partition;
85 enum MXFMetadataSetType type;
86 UID source_container_ul;
91 enum MXFMetadataSetType type;
92 UID source_package_uid;
93 UID data_definition_ul;
95 int64_t start_position;
97 } MXFStructuralComponent;
101 enum MXFMetadataSetType type;
102 UID data_definition_ul;
103 UID *structural_components_refs;
104 int structural_components_count;
110 enum MXFMetadataSetType type;
111 MXFSequence *sequence; /* mandatory, and only one */
114 uint8_t track_number[4];
115 AVRational edit_rate;
120 enum MXFMetadataSetType type;
121 UID essence_container_ul;
122 UID essence_codec_ul;
123 AVRational sample_rate;
124 AVRational aspect_ratio;
129 UID *sub_descriptors_refs;
130 int sub_descriptors_count;
134 enum PixelFormat pix_fmt;
139 enum MXFMetadataSetType type;
140 int edit_unit_byte_count;
144 AVRational index_edit_rate;
145 uint64_t index_start_position;
146 uint64_t index_duration;
149 int nb_delta_entries;
151 uint64_t *stream_offset_entries;
152 uint32_t **slice_offset_entries;
153 int nb_index_entries;
154 } MXFIndexTableSegment;
158 enum MXFMetadataSetType type;
162 MXFDescriptor *descriptor; /* only one */
168 enum MXFMetadataSetType type;
172 MXFPartition *partitions;
173 unsigned partitions_count;
177 MXFMetadataSet **metadata_sets;
178 int metadata_sets_count;
182 int local_tags_count;
183 uint64_t footer_partition;
185 int64_t essence_offset;
186 int first_essence_kl_length;
187 int64_t first_essence_length;
188 KLVPacket current_klv_data;
189 int current_klv_index;
192 enum MXFWrappingScheme {
197 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid);
201 MXFMetadataReadFunc *read;
203 enum MXFMetadataSetType type;
204 } MXFMetadataReadTableEntry;
206 /* partial keys to match */
207 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
208 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
209 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
210 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
211 /* complete keys to match */
212 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
213 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
214 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
215 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
217 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
219 static int64_t klv_decode_ber_length(AVIOContext *pb)
221 uint64_t size = avio_r8(pb);
222 if (size & 0x80) { /* long form */
223 int bytes_num = size & 0x7f;
224 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
229 size = size << 8 | avio_r8(pb);
234 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
237 for (i = 0; i < size && !url_feof(pb); i++) {
241 else if (b != key[i])
247 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
249 if (!mxf_read_sync(pb, mxf_klv_key, 4))
251 klv->offset = avio_tell(pb) - 4;
252 memcpy(klv->key, mxf_klv_key, 4);
253 avio_read(pb, klv->key + 4, 12);
254 klv->length = klv_decode_ber_length(pb);
255 return klv->length == -1 ? -1 : 0;
258 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
262 for (i = 0; i < s->nb_streams; i++) {
263 MXFTrack *track = s->streams[i]->priv_data;
265 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
268 /* return 0 if only one stream, for OP Atom files with 0 as track number */
269 return s->nb_streams == 1 ? 0 : -1;
272 /* XXX: use AVBitStreamFilter */
273 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
275 const uint8_t *buf_ptr, *end_ptr;
279 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
281 length = av_get_packet(pb, pkt, length);
284 data_ptr = pkt->data;
285 end_ptr = pkt->data + length;
286 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
287 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
288 for (i = 0; i < st->codec->channels; i++) {
289 uint32_t sample = bytestream_get_le32(&buf_ptr);
290 if (st->codec->bits_per_coded_sample == 24)
291 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
293 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
295 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
297 av_shrink_packet(pkt, data_ptr - pkt->data);
301 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
303 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
304 MXFContext *mxf = s->priv_data;
305 AVIOContext *pb = s->pb;
306 int64_t end = avio_tell(pb) + klv->length;
309 uint64_t plaintext_size;
314 if (!mxf->aesc && s->key && s->keylen == 16) {
315 mxf->aesc = av_malloc(av_aes_size);
318 av_aes_init(mxf->aesc, s->key, 128, 1);
321 avio_skip(pb, klv_decode_ber_length(pb));
323 klv_decode_ber_length(pb);
324 plaintext_size = avio_rb64(pb);
326 klv_decode_ber_length(pb);
327 avio_read(pb, klv->key, 16);
328 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
330 index = mxf_get_stream_index(s, klv);
334 klv_decode_ber_length(pb);
335 orig_size = avio_rb64(pb);
336 if (orig_size < plaintext_size)
339 size = klv_decode_ber_length(pb);
340 if (size < 32 || size - 32 < orig_size)
342 avio_read(pb, ivec, 16);
343 avio_read(pb, tmpbuf, 16);
345 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
346 if (memcmp(tmpbuf, checkv, 16))
347 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
349 size = av_get_packet(pb, pkt, size);
352 else if (size < plaintext_size)
353 return AVERROR_INVALIDDATA;
354 size -= plaintext_size;
356 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
357 &pkt->data[plaintext_size], size >> 4, ivec, 1);
358 av_shrink_packet(pkt, orig_size);
359 pkt->stream_index = index;
360 avio_skip(pb, end - avio_tell(pb));
364 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
368 while (!url_feof(s->pb)) {
369 if (klv_read_packet(&klv, s->pb) < 0)
371 PRINT_KEY(s, "read packet", klv.key);
372 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
373 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
374 int res = mxf_decrypt_triplet(s, pkt, &klv);
376 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
381 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
382 int index = mxf_get_stream_index(s, &klv);
384 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
387 if (s->streams[index]->discard == AVDISCARD_ALL)
389 /* check for 8 channels AES3 element */
390 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
391 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
392 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
396 int ret = av_get_packet(s->pb, pkt, klv.length);
400 pkt->stream_index = index;
401 pkt->pos = klv.offset;
405 avio_skip(s->pb, klv.length);
410 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid)
412 MXFContext *mxf = arg;
413 int item_num = avio_rb32(pb);
414 int item_len = avio_rb32(pb);
416 if (item_len != 18) {
417 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
420 if (item_num > UINT_MAX / item_len)
422 mxf->local_tags_count = item_num;
423 mxf->local_tags = av_malloc(item_num*item_len);
424 if (!mxf->local_tags)
426 avio_read(pb, mxf->local_tags, item_num*item_len);
430 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid)
432 MXFContext *mxf = arg;
433 MXFPartition *partition;
435 uint64_t footer_partition;
437 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
438 return AVERROR(ENOMEM);
440 mxf->partitions = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
441 if (!mxf->partitions)
442 return AVERROR(ENOMEM);
444 partition = &mxf->partitions[mxf->partitions_count++];
448 partition->type = Header;
451 partition->type = BodyPartition;
454 partition->type = Footer;
457 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
458 return AVERROR_INVALIDDATA;
461 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
462 partition->closed = partition->type == Footer || !(uid[14] & 1);
463 partition->complete = uid[14] > 2;
465 partition->previous_partition = avio_rb64(pb);
466 footer_partition = avio_rb64(pb);
468 partition->index_sid = avio_rb32(pb);
470 partition->body_sid = avio_rb32(pb);
471 avio_read(pb, op, sizeof(UID));
473 /* some files don'thave FooterPartition set in every partition */
474 if (footer_partition) {
475 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
476 av_log(mxf->fc, AV_LOG_ERROR, "inconsistent FooterPartition value: %li != %li\n",
477 mxf->footer_partition, footer_partition);
479 mxf->footer_partition = footer_partition;
483 av_dlog(mxf->fc, "PartitionPack: PreviousPartition = 0x%lx, "
484 "FooterPartition = 0x%lx, IndexSID = %i, BodySID = %i\n",
485 partition->previous_partition, footer_partition,
486 partition->index_sid, partition->body_sid);
488 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
489 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
490 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
491 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
492 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
493 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
494 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
495 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
496 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
497 else if (op[12] == 0x10) mxf->op = OPAtom;
499 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh\n", op[12], op[13]);
504 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
506 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
507 return AVERROR(ENOMEM);
508 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
509 if (!mxf->metadata_sets)
511 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
512 mxf->metadata_sets_count++;
516 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid)
518 MXFCryptoContext *cryptocontext = arg;
521 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
522 avio_read(pb, cryptocontext->source_container_ul, 16);
526 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid)
528 MXFContext *mxf = arg;
531 mxf->packages_count = avio_rb32(pb);
532 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
534 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
535 if (!mxf->packages_refs)
537 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
538 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
544 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid)
546 MXFStructuralComponent *source_clip = arg;
549 source_clip->duration = avio_rb64(pb);
552 source_clip->start_position = avio_rb64(pb);
555 /* UMID, only get last 16 bytes */
557 avio_read(pb, source_clip->source_package_uid, 16);
560 source_clip->source_track_id = avio_rb32(pb);
566 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid)
568 MXFPackage *package = arg;
571 package->tracks_count = avio_rb32(pb);
572 if (package->tracks_count >= UINT_MAX / sizeof(UID))
574 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
575 if (!package->tracks_refs)
577 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
578 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
584 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid)
586 MXFTrack *track = arg;
589 track->track_id = avio_rb32(pb);
592 avio_read(pb, track->track_number, 4);
595 track->edit_rate.den = avio_rb32(pb);
596 track->edit_rate.num = avio_rb32(pb);
599 avio_read(pb, track->sequence_ref, 16);
605 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid)
607 MXFSequence *sequence = arg;
610 sequence->duration = avio_rb64(pb);
613 avio_read(pb, sequence->data_definition_ul, 16);
616 sequence->structural_components_count = avio_rb32(pb);
617 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
619 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
620 if (!sequence->structural_components_refs)
622 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
623 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
629 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid)
631 MXFPackage *package = arg;
634 package->tracks_count = avio_rb32(pb);
635 if (package->tracks_count >= UINT_MAX / sizeof(UID))
637 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
638 if (!package->tracks_refs)
640 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
641 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
644 /* UMID, only get last 16 bytes */
646 avio_read(pb, package->package_uid, 16);
649 avio_read(pb, package->descriptor_ref, 16);
655 static int mxf_read_delta_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
659 segment->nb_delta_entries = avio_rb32(pb);
660 length = avio_rb32(pb);
662 if (!(segment->slice = av_calloc(segment->nb_delta_entries, sizeof(*segment->slice))) ||
663 !(segment->element_delta = av_calloc(segment->nb_delta_entries, sizeof(*segment->element_delta))))
664 return AVERROR(ENOMEM);
666 for (i = 0; i < segment->nb_delta_entries; i++) {
667 avio_r8(pb); /* PosTableIndex */
668 segment->slice[i] = avio_r8(pb);
669 segment->element_delta[i] = avio_rb32(pb);
674 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
678 segment->nb_index_entries = avio_rb32(pb);
679 length = avio_rb32(pb);
681 if (!(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
682 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
683 return AVERROR(ENOMEM);
685 if (segment->slice_count &&
686 !(segment->slice_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->slice_offset_entries))))
687 return AVERROR(ENOMEM);
689 for (i = 0; i < segment->nb_index_entries; i++) {
690 avio_rb16(pb); /* TemporalOffset and KeyFrameOffset */
691 segment->flag_entries[i] = avio_r8(pb);
692 segment->stream_offset_entries[i] = avio_rb64(pb);
693 if (segment->slice_count) {
694 if (!(segment->slice_offset_entries[i] = av_calloc(segment->slice_count, sizeof(**segment->slice_offset_entries))))
695 return AVERROR(ENOMEM);
697 for (j = 0; j < segment->slice_count; j++)
698 segment->slice_offset_entries[i][j] = avio_rb32(pb);
701 avio_skip(pb, length - 11 - 4 * segment->slice_count);
706 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid)
708 MXFIndexTableSegment *segment = arg;
711 segment->edit_unit_byte_count = avio_rb32(pb);
712 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
715 segment->index_sid = avio_rb32(pb);
716 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
719 segment->body_sid = avio_rb32(pb);
720 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
723 segment->slice_count = avio_r8(pb);
724 av_dlog(NULL, "SliceCount %d\n", segment->slice_count);
727 av_dlog(NULL, "DeltaEntryArray found\n");
728 return mxf_read_delta_entry_array(pb, segment);
730 av_dlog(NULL, "IndexEntryArray found\n");
731 return mxf_read_index_entry_array(pb, segment);
733 segment->index_edit_rate.num = avio_rb32(pb);
734 segment->index_edit_rate.den = avio_rb32(pb);
735 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
736 segment->index_edit_rate.den);
739 segment->index_start_position = avio_rb64(pb);
740 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
743 segment->index_duration = avio_rb64(pb);
744 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
750 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
752 int code, value, ofs = 0;
753 char layout[16] = {0};
758 av_dlog(NULL, "pixel layout: code %#x\n", code);
761 layout[ofs++] = code;
762 layout[ofs++] = value;
764 } while (code != 0); /* SMPTE 377M E.2.46 */
766 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
769 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid)
771 MXFDescriptor *descriptor = arg;
774 descriptor->sub_descriptors_count = avio_rb32(pb);
775 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
777 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
778 if (!descriptor->sub_descriptors_refs)
780 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
781 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
784 avio_read(pb, descriptor->essence_container_ul, 16);
787 descriptor->linked_track_id = avio_rb32(pb);
789 case 0x3201: /* PictureEssenceCoding */
790 avio_read(pb, descriptor->essence_codec_ul, 16);
793 descriptor->width = avio_rb32(pb);
796 descriptor->height = avio_rb32(pb);
799 descriptor->aspect_ratio.num = avio_rb32(pb);
800 descriptor->aspect_ratio.den = avio_rb32(pb);
803 descriptor->sample_rate.num = avio_rb32(pb);
804 descriptor->sample_rate.den = avio_rb32(pb);
806 case 0x3D06: /* SoundEssenceCompression */
807 avio_read(pb, descriptor->essence_codec_ul, 16);
810 descriptor->channels = avio_rb32(pb);
813 descriptor->bits_per_sample = avio_rb32(pb);
816 mxf_read_pixel_layout(pb, descriptor);
819 /* Private uid used by SONY C0023S01.mxf */
820 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
821 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
822 if (!descriptor->extradata)
824 descriptor->extradata_size = size;
825 avio_read(pb, descriptor->extradata, size);
833 * Match an uid independently of the version byte and up to len common bytes
836 static int mxf_match_uid(const UID key, const UID uid, int len)
839 for (i = 0; i < len; i++) {
840 if (i != 7 && key[i] != uid[i])
846 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
848 while (uls->uid[0]) {
849 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
856 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
862 for (i = 0; i < mxf->metadata_sets_count; i++) {
863 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
864 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
865 return mxf->metadata_sets[i];
871 static const MXFCodecUL mxf_essence_container_uls[] = {
872 // video essence container uls
873 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
874 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
875 // sound essence container uls
876 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
877 { { 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 */
878 { { 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 */
879 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
882 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
884 int i, j, nb_segments = 0;
885 MXFIndexTableSegment **unsorted_segments;
886 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
888 /* count number of segments, allocate arrays and copy unsorted segments */
889 for (i = 0; i < mxf->metadata_sets_count; i++)
890 if (mxf->metadata_sets[i]->type == IndexTableSegment)
893 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
894 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
895 av_free(unsorted_segments);
896 return AVERROR(ENOMEM);
899 for (i = j = 0; i < mxf->metadata_sets_count; i++)
900 if (mxf->metadata_sets[i]->type == IndexTableSegment)
901 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
903 *nb_sorted_segments = 0;
905 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
906 for (i = 0; i < nb_segments; i++) {
907 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
909 for (j = 0; j < nb_segments; j++) {
910 MXFIndexTableSegment *s = unsorted_segments[j];
912 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
913 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
915 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
916 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
918 best_body_sid = s->body_sid;
919 best_index_sid = s->index_sid;
920 best_index_start = s->index_start_position;
924 /* no suitable entry found -> we're done */
928 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
929 last_body_sid = best_body_sid;
930 last_index_sid = best_index_sid;
931 last_index_start = best_index_start;
934 av_free(unsorted_segments);
939 static int mxf_parse_index(MXFContext *mxf, int i, AVStream *st)
941 int64_t accumulated_offset = 0;
942 int j, k, ret, nb_sorted_segments;
943 MXFIndexTableSegment **sorted_segments;
945 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)))
948 for (j = 0; j < nb_sorted_segments; j++) {
950 int duration, sample_duration = 1, last_sample_size = 0;
951 int64_t segment_size;
952 MXFIndexTableSegment *tableseg = sorted_segments[j];
954 /* reset accumulated_offset on BodySID change */
955 if (j > 0 && tableseg->body_sid != sorted_segments[j-1]->body_sid)
956 accumulated_offset = 0;
958 /* HACK: How to correctly link between streams and slices? */
959 if (i < mxf->system_item + st->index)
961 if (n_delta >= tableseg->nb_delta_entries && st->index != 0)
963 duration = tableseg->index_duration > 0 ? tableseg->index_duration :
964 st->duration - st->nb_index_entries;
965 segment_size = tableseg->edit_unit_byte_count * duration;
966 /* check small EditUnitByteCount for audio */
967 if (tableseg->edit_unit_byte_count && tableseg->edit_unit_byte_count < 32
968 && !tableseg->index_duration) {
969 /* duration might be prime relative to the new sample_duration,
970 * which means we need to handle the last frame differently */
971 sample_duration = 8192;
972 last_sample_size = (duration % sample_duration) * tableseg->edit_unit_byte_count;
973 tableseg->edit_unit_byte_count *= sample_duration;
974 duration /= sample_duration;
975 if (last_sample_size) duration++;
978 for (k = 0; k < duration; k++) {
982 if (k < tableseg->nb_index_entries) {
983 pos = tableseg->stream_offset_entries[k];
984 if (n_delta < tableseg->nb_delta_entries) {
985 if (n_delta < tableseg->nb_delta_entries - 1) {
987 tableseg->slice_offset_entries[k][tableseg->slice[n_delta+1]-1] +
988 tableseg->element_delta[n_delta+1] -
989 tableseg->element_delta[n_delta];
990 if (tableseg->slice[n_delta] > 0)
991 size -= tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
992 } else if (k < duration - 1) {
993 size = tableseg->stream_offset_entries[k+1] -
994 tableseg->stream_offset_entries[k] -
995 tableseg->slice_offset_entries[k][tableseg->slice[tableseg->nb_delta_entries-1]-1] -
996 tableseg->element_delta[tableseg->nb_delta_entries-1];
999 if (tableseg->slice[n_delta] > 0)
1000 pos += tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
1001 pos += tableseg->element_delta[n_delta];
1004 flags = !(tableseg->flag_entries[k] & 0x30) ? AVINDEX_KEYFRAME : 0;
1006 pos = (int64_t)k * tableseg->edit_unit_byte_count + accumulated_offset;
1007 if (n_delta < tableseg->nb_delta_entries - 1)
1008 size = tableseg->element_delta[n_delta+1] - tableseg->element_delta[n_delta];
1010 /* use smaller size for last sample if we should */
1011 if (last_sample_size && k == duration - 1)
1012 size = last_sample_size;
1014 size = tableseg->edit_unit_byte_count;
1015 if (tableseg->nb_delta_entries)
1016 size -= tableseg->element_delta[tableseg->nb_delta_entries-1];
1018 if (n_delta < tableseg->nb_delta_entries)
1019 pos += tableseg->element_delta[n_delta];
1020 flags = AVINDEX_KEYFRAME;
1023 if (k > 0 && pos < mxf->first_essence_length && accumulated_offset == 0)
1024 pos += mxf->first_essence_kl_length;
1026 pos += mxf->essence_offset;
1028 av_dlog(mxf->fc, "Stream %d IndexEntry %d n_Delta %d Offset %"PRIx64" Timestamp %"PRId64"\n",
1029 st->index, st->nb_index_entries, n_delta, pos, sample_duration * st->nb_index_entries);
1031 if ((ret = av_add_index_entry(st, pos, sample_duration * st->nb_index_entries, size, 0, flags)) < 0)
1034 accumulated_offset += segment_size;
1037 av_free(sorted_segments);
1042 static int mxf_parse_structural_metadata(MXFContext *mxf)
1044 MXFPackage *material_package = NULL;
1045 MXFPackage *temp_package = NULL;
1048 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1049 /* TODO: handle multiple material packages (OP3x) */
1050 for (i = 0; i < mxf->packages_count; i++) {
1051 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1052 if (material_package) break;
1054 if (!material_package) {
1055 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1059 for (i = 0; i < material_package->tracks_count; i++) {
1060 MXFPackage *source_package = NULL;
1061 MXFTrack *material_track = NULL;
1062 MXFTrack *source_track = NULL;
1063 MXFTrack *temp_track = NULL;
1064 MXFDescriptor *descriptor = NULL;
1065 MXFStructuralComponent *component = NULL;
1066 UID *essence_container_ul = NULL;
1067 const MXFCodecUL *codec_ul = NULL;
1068 const MXFCodecUL *container_ul = NULL;
1071 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1072 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1076 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1077 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1081 /* TODO: handle multiple source clips */
1082 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1083 /* TODO: handle timecode component */
1084 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1088 for (k = 0; k < mxf->packages_count; k++) {
1089 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1092 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1093 source_package = temp_package;
1097 if (!source_package) {
1098 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
1101 for (k = 0; k < source_package->tracks_count; k++) {
1102 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1103 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1106 if (temp_track->track_id == component->source_track_id) {
1107 source_track = temp_track;
1111 if (!source_track) {
1112 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1119 st = avformat_new_stream(mxf->fc, NULL);
1121 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1124 st->id = source_track->track_id;
1125 st->priv_data = source_track;
1126 st->duration = component->duration;
1127 if (st->duration == -1)
1128 st->duration = AV_NOPTS_VALUE;
1129 st->start_time = component->start_position;
1130 av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1132 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1133 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1137 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1138 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1139 st->codec->codec_type = codec_ul->id;
1141 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1142 if (source_package->descriptor) {
1143 if (source_package->descriptor->type == MultipleDescriptor) {
1144 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1145 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1147 if (!sub_descriptor) {
1148 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1151 if (sub_descriptor->linked_track_id == source_track->track_id) {
1152 descriptor = sub_descriptor;
1156 } else if (source_package->descriptor->type == Descriptor)
1157 descriptor = source_package->descriptor;
1160 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1163 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1164 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1165 essence_container_ul = &descriptor->essence_container_ul;
1166 /* HACK: replacing the original key with mxf_encrypted_essence_container
1167 * is not allowed according to s429-6, try to find correct information anyway */
1168 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1169 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1170 for (k = 0; k < mxf->metadata_sets_count; k++) {
1171 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1172 if (metadata->type == CryptoContext) {
1173 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1178 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1179 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1180 st->codec->codec_id = codec_ul->id;
1181 if (descriptor->extradata) {
1182 st->codec->extradata = descriptor->extradata;
1183 st->codec->extradata_size = descriptor->extradata_size;
1185 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1186 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
1187 if (st->codec->codec_id == CODEC_ID_NONE)
1188 st->codec->codec_id = container_ul->id;
1189 st->codec->width = descriptor->width;
1190 st->codec->height = descriptor->height;
1191 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1192 st->codec->pix_fmt = descriptor->pix_fmt;
1193 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1194 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1195 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
1196 if (st->codec->codec_id == CODEC_ID_NONE)
1197 st->codec->codec_id = container_ul->id;
1198 st->codec->channels = descriptor->channels;
1199 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1200 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1201 /* TODO: implement CODEC_ID_RAWAUDIO */
1202 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1203 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1204 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1205 else if (descriptor->bits_per_sample == 32)
1206 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1207 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1208 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1209 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1210 else if (descriptor->bits_per_sample == 32)
1211 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1212 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1213 st->need_parsing = AVSTREAM_PARSE_FULL;
1216 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1217 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
1218 st->need_parsing = AVSTREAM_PARSE_FULL;
1221 if ((ret = mxf_parse_index(mxf, i, st)))
1227 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1228 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1229 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1230 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1231 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1232 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1233 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1234 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1235 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1236 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1237 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1238 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1239 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1240 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1241 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1242 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1243 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1244 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1245 { { 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 */
1246 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1247 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1248 { { 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 */
1249 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1250 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1251 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1252 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1253 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1254 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1255 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1258 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1260 AVIOContext *pb = mxf->fc->pb;
1261 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1262 uint64_t klv_end = avio_tell(pb) + klv->length;
1266 while (avio_tell(pb) + 4 < klv_end) {
1267 int tag = avio_rb16(pb);
1268 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1269 uint64_t next = avio_tell(pb) + size;
1272 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1273 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1274 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1277 if (tag > 0x7FFF) { /* dynamic tag */
1279 for (i = 0; i < mxf->local_tags_count; i++) {
1280 int local_tag = AV_RB16(mxf->local_tags+i*18);
1281 if (local_tag == tag) {
1282 memcpy(uid, mxf->local_tags+i*18+2, 16);
1283 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1284 PRINT_KEY(mxf->fc, "uid", uid);
1288 if (ctx_size && tag == 0x3C0A)
1289 avio_read(pb, ctx->uid, 16);
1290 else if (read_child(ctx, pb, tag, size, uid) < 0)
1293 avio_seek(pb, next, SEEK_SET);
1295 if (ctx_size) ctx->type = type;
1296 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1299 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
1301 MXFContext *mxf = s->priv_data;
1304 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1305 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1308 avio_seek(s->pb, -14, SEEK_CUR);
1310 while (!url_feof(s->pb)) {
1311 const MXFMetadataReadTableEntry *metadata;
1313 if (klv_read_packet(&klv, s->pb) < 0)
1315 PRINT_KEY(s, "read header", klv.key);
1316 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1317 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1318 IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
1319 /* FIXME avoid seek */
1320 avio_seek(s->pb, klv.offset, SEEK_SET);
1323 if (IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1324 mxf->system_item = 1;
1325 avio_skip(s->pb, klv.length);
1329 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1330 if (IS_KLV_KEY(klv.key, metadata->key)) {
1332 if (klv.key[5] == 0x53) {
1333 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1335 uint64_t next = avio_tell(s->pb) + klv.length;
1336 res = metadata->read(mxf, s->pb, 0, 0, klv.key);
1337 avio_seek(s->pb, next, SEEK_SET);
1340 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1346 if (!metadata->read)
1347 avio_skip(s->pb, klv.length);
1349 return mxf_parse_structural_metadata(mxf);
1352 static int mxf_read_close(AVFormatContext *s)
1354 MXFContext *mxf = s->priv_data;
1355 MXFIndexTableSegment *seg;
1358 av_freep(&mxf->packages_refs);
1360 for (i = 0; i < s->nb_streams; i++)
1361 s->streams[i]->priv_data = NULL;
1363 for (i = 0; i < mxf->metadata_sets_count; i++) {
1364 switch (mxf->metadata_sets[i]->type) {
1365 case MultipleDescriptor:
1366 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1369 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1372 case MaterialPackage:
1373 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1375 case IndexTableSegment:
1376 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1377 for (j = 0; j < seg->nb_index_entries; j++)
1378 av_freep(&seg->slice_offset_entries[j]);
1379 av_freep(&seg->slice);
1380 av_freep(&seg->element_delta);
1381 av_freep(&seg->flag_entries);
1382 av_freep(&seg->stream_offset_entries);
1383 av_freep(&seg->slice_offset_entries);
1388 av_freep(&mxf->metadata_sets[i]);
1390 av_freep(&mxf->partitions);
1391 av_freep(&mxf->metadata_sets);
1392 av_freep(&mxf->aesc);
1393 av_freep(&mxf->local_tags);
1397 static int mxf_probe(AVProbeData *p) {
1398 uint8_t *bufp = p->buf;
1399 uint8_t *end = p->buf + p->buf_size;
1401 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1404 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1405 end -= sizeof(mxf_header_partition_pack_key);
1406 for (; bufp < end; bufp++) {
1407 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1408 return AVPROBE_SCORE_MAX;
1413 /* rudimentary byte seek */
1414 /* XXX: use MXF Index */
1415 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1417 AVStream *st = s->streams[stream_index];
1422 if (sample_time < 0)
1424 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1425 if (avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET) < 0)
1427 ff_update_cur_dts(s, st, sample_time);
1431 AVInputFormat ff_mxf_demuxer = {
1433 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1434 .priv_data_size = sizeof(MXFContext),
1435 .read_probe = mxf_probe,
1436 .read_header = mxf_read_header,
1437 .read_packet = mxf_read_packet,
1438 .read_close = mxf_read_close,
1439 .read_seek = mxf_read_seek,