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;
81 int64_t this_partition;
86 enum MXFMetadataSetType type;
87 UID source_container_ul;
92 enum MXFMetadataSetType type;
93 UID source_package_uid;
94 UID data_definition_ul;
96 int64_t start_position;
98 } MXFStructuralComponent;
102 enum MXFMetadataSetType type;
103 UID data_definition_ul;
104 UID *structural_components_refs;
105 int structural_components_count;
111 enum MXFMetadataSetType type;
112 MXFSequence *sequence; /* mandatory, and only one */
115 uint8_t track_number[4];
116 AVRational edit_rate;
121 enum MXFMetadataSetType type;
122 UID essence_container_ul;
123 UID essence_codec_ul;
124 AVRational sample_rate;
125 AVRational aspect_ratio;
130 UID *sub_descriptors_refs;
131 int sub_descriptors_count;
135 enum PixelFormat pix_fmt;
140 enum MXFMetadataSetType type;
141 int edit_unit_byte_count;
145 AVRational index_edit_rate;
146 uint64_t index_start_position;
147 uint64_t index_duration;
150 int nb_delta_entries;
152 uint64_t *stream_offset_entries;
153 uint32_t **slice_offset_entries;
154 int nb_index_entries;
155 } MXFIndexTableSegment;
159 enum MXFMetadataSetType type;
163 MXFDescriptor *descriptor; /* only one */
169 enum MXFMetadataSetType type;
173 MXFPartition *partitions;
174 unsigned partitions_count;
178 MXFMetadataSet **metadata_sets;
179 int metadata_sets_count;
183 int local_tags_count;
184 uint64_t footer_partition;
186 int64_t essence_offset;
187 int first_essence_kl_length;
188 int64_t first_essence_length;
189 KLVPacket current_klv_data;
190 int current_klv_index;
192 MXFPartition *current_partition;
193 int parsing_backward;
194 int64_t last_forward_tell;
197 enum MXFWrappingScheme {
202 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid);
206 MXFMetadataReadFunc *read;
208 enum MXFMetadataSetType type;
209 } MXFMetadataReadTableEntry;
211 /* partial keys to match */
212 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
213 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
214 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
215 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
216 /* complete keys to match */
217 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 };
218 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
219 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
220 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
222 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
224 static int64_t klv_decode_ber_length(AVIOContext *pb)
226 uint64_t size = avio_r8(pb);
227 if (size & 0x80) { /* long form */
228 int bytes_num = size & 0x7f;
229 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
234 size = size << 8 | avio_r8(pb);
239 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
242 for (i = 0; i < size && !url_feof(pb); i++) {
246 else if (b != key[i])
252 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
254 if (!mxf_read_sync(pb, mxf_klv_key, 4))
256 klv->offset = avio_tell(pb) - 4;
257 memcpy(klv->key, mxf_klv_key, 4);
258 avio_read(pb, klv->key + 4, 12);
259 klv->length = klv_decode_ber_length(pb);
260 return klv->length == -1 ? -1 : 0;
263 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
267 for (i = 0; i < s->nb_streams; i++) {
268 MXFTrack *track = s->streams[i]->priv_data;
270 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
273 /* return 0 if only one stream, for OP Atom files with 0 as track number */
274 return s->nb_streams == 1 ? 0 : -1;
277 /* XXX: use AVBitStreamFilter */
278 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
280 const uint8_t *buf_ptr, *end_ptr;
284 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
286 length = av_get_packet(pb, pkt, length);
289 data_ptr = pkt->data;
290 end_ptr = pkt->data + length;
291 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
292 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
293 for (i = 0; i < st->codec->channels; i++) {
294 uint32_t sample = bytestream_get_le32(&buf_ptr);
295 if (st->codec->bits_per_coded_sample == 24)
296 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
298 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
300 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
302 av_shrink_packet(pkt, data_ptr - pkt->data);
306 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
308 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
309 MXFContext *mxf = s->priv_data;
310 AVIOContext *pb = s->pb;
311 int64_t end = avio_tell(pb) + klv->length;
314 uint64_t plaintext_size;
319 if (!mxf->aesc && s->key && s->keylen == 16) {
320 mxf->aesc = av_malloc(av_aes_size);
323 av_aes_init(mxf->aesc, s->key, 128, 1);
326 avio_skip(pb, klv_decode_ber_length(pb));
328 klv_decode_ber_length(pb);
329 plaintext_size = avio_rb64(pb);
331 klv_decode_ber_length(pb);
332 avio_read(pb, klv->key, 16);
333 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
335 index = mxf_get_stream_index(s, klv);
339 klv_decode_ber_length(pb);
340 orig_size = avio_rb64(pb);
341 if (orig_size < plaintext_size)
344 size = klv_decode_ber_length(pb);
345 if (size < 32 || size - 32 < orig_size)
347 avio_read(pb, ivec, 16);
348 avio_read(pb, tmpbuf, 16);
350 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
351 if (memcmp(tmpbuf, checkv, 16))
352 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
354 size = av_get_packet(pb, pkt, size);
357 else if (size < plaintext_size)
358 return AVERROR_INVALIDDATA;
359 size -= plaintext_size;
361 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
362 &pkt->data[plaintext_size], size >> 4, ivec, 1);
363 av_shrink_packet(pkt, orig_size);
364 pkt->stream_index = index;
365 avio_skip(pb, end - avio_tell(pb));
369 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
373 while (!url_feof(s->pb)) {
374 if (klv_read_packet(&klv, s->pb) < 0)
376 PRINT_KEY(s, "read packet", klv.key);
377 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
378 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
379 int res = mxf_decrypt_triplet(s, pkt, &klv);
381 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
386 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
387 int index = mxf_get_stream_index(s, &klv);
389 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
392 if (s->streams[index]->discard == AVDISCARD_ALL)
394 /* check for 8 channels AES3 element */
395 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
396 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
397 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
401 int ret = av_get_packet(s->pb, pkt, klv.length);
405 pkt->stream_index = index;
406 pkt->pos = klv.offset;
410 avio_skip(s->pb, klv.length);
415 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid)
417 MXFContext *mxf = arg;
418 int item_num = avio_rb32(pb);
419 int item_len = avio_rb32(pb);
421 if (item_len != 18) {
422 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
425 if (item_num > UINT_MAX / item_len)
427 mxf->local_tags_count = item_num;
428 mxf->local_tags = av_malloc(item_num*item_len);
429 if (!mxf->local_tags)
431 avio_read(pb, mxf->local_tags, item_num*item_len);
435 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid)
437 MXFContext *mxf = arg;
438 MXFPartition *partition;
440 uint64_t footer_partition;
442 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
443 return AVERROR(ENOMEM);
445 mxf->partitions = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
446 if (!mxf->partitions)
447 return AVERROR(ENOMEM);
449 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count++];
453 partition->type = Header;
456 partition->type = BodyPartition;
459 partition->type = Footer;
462 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
463 return AVERROR_INVALIDDATA;
466 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
467 partition->closed = partition->type == Footer || !(uid[14] & 1);
468 partition->complete = uid[14] > 2;
470 partition->this_partition = avio_rb64(pb);
471 partition->previous_partition = avio_rb64(pb);
472 footer_partition = avio_rb64(pb);
474 partition->index_sid = avio_rb32(pb);
476 partition->body_sid = avio_rb32(pb);
477 avio_read(pb, op, sizeof(UID));
479 /* some files don'thave FooterPartition set in every partition */
480 if (footer_partition) {
481 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
482 av_log(mxf->fc, AV_LOG_ERROR, "inconsistent FooterPartition value: %li != %li\n",
483 mxf->footer_partition, footer_partition);
485 mxf->footer_partition = footer_partition;
489 av_dlog(mxf->fc, "PartitionPack: ThisPartition = 0x%lx, PreviousPartition = 0x%lx, "
490 "FooterPartition = 0x%lx, IndexSID = %i, BodySID = %i\n",
491 partition->this_partition,
492 partition->previous_partition, footer_partition,
493 partition->index_sid, partition->body_sid);
495 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
496 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
497 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
498 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
499 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
500 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
501 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
502 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
503 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
504 else if (op[12] == 0x10) mxf->op = OPAtom;
506 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh\n", op[12], op[13]);
511 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
513 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
514 return AVERROR(ENOMEM);
515 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
516 if (!mxf->metadata_sets)
518 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
519 mxf->metadata_sets_count++;
523 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid)
525 MXFCryptoContext *cryptocontext = arg;
528 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
529 avio_read(pb, cryptocontext->source_container_ul, 16);
533 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid)
535 MXFContext *mxf = arg;
538 mxf->packages_count = avio_rb32(pb);
539 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
541 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
542 if (!mxf->packages_refs)
544 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
545 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
551 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid)
553 MXFStructuralComponent *source_clip = arg;
556 source_clip->duration = avio_rb64(pb);
559 source_clip->start_position = avio_rb64(pb);
562 /* UMID, only get last 16 bytes */
564 avio_read(pb, source_clip->source_package_uid, 16);
567 source_clip->source_track_id = avio_rb32(pb);
573 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid)
575 MXFPackage *package = arg;
578 package->tracks_count = avio_rb32(pb);
579 if (package->tracks_count >= UINT_MAX / sizeof(UID))
581 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
582 if (!package->tracks_refs)
584 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
585 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
591 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid)
593 MXFTrack *track = arg;
596 track->track_id = avio_rb32(pb);
599 avio_read(pb, track->track_number, 4);
602 track->edit_rate.den = avio_rb32(pb);
603 track->edit_rate.num = avio_rb32(pb);
606 avio_read(pb, track->sequence_ref, 16);
612 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid)
614 MXFSequence *sequence = arg;
617 sequence->duration = avio_rb64(pb);
620 avio_read(pb, sequence->data_definition_ul, 16);
623 sequence->structural_components_count = avio_rb32(pb);
624 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
626 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
627 if (!sequence->structural_components_refs)
629 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
630 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
636 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid)
638 MXFPackage *package = arg;
641 package->tracks_count = avio_rb32(pb);
642 if (package->tracks_count >= UINT_MAX / sizeof(UID))
644 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
645 if (!package->tracks_refs)
647 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
648 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
651 /* UMID, only get last 16 bytes */
653 avio_read(pb, package->package_uid, 16);
656 avio_read(pb, package->descriptor_ref, 16);
662 static int mxf_read_delta_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
666 segment->nb_delta_entries = avio_rb32(pb);
667 length = avio_rb32(pb);
669 if (!(segment->slice = av_calloc(segment->nb_delta_entries, sizeof(*segment->slice))) ||
670 !(segment->element_delta = av_calloc(segment->nb_delta_entries, sizeof(*segment->element_delta))))
671 return AVERROR(ENOMEM);
673 for (i = 0; i < segment->nb_delta_entries; i++) {
674 avio_r8(pb); /* PosTableIndex */
675 segment->slice[i] = avio_r8(pb);
676 segment->element_delta[i] = avio_rb32(pb);
681 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
685 segment->nb_index_entries = avio_rb32(pb);
686 length = avio_rb32(pb);
688 if (!(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
689 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
690 return AVERROR(ENOMEM);
692 if (segment->slice_count &&
693 !(segment->slice_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->slice_offset_entries))))
694 return AVERROR(ENOMEM);
696 for (i = 0; i < segment->nb_index_entries; i++) {
697 avio_rb16(pb); /* TemporalOffset and KeyFrameOffset */
698 segment->flag_entries[i] = avio_r8(pb);
699 segment->stream_offset_entries[i] = avio_rb64(pb);
700 if (segment->slice_count) {
701 if (!(segment->slice_offset_entries[i] = av_calloc(segment->slice_count, sizeof(**segment->slice_offset_entries))))
702 return AVERROR(ENOMEM);
704 for (j = 0; j < segment->slice_count; j++)
705 segment->slice_offset_entries[i][j] = avio_rb32(pb);
708 avio_skip(pb, length - 11 - 4 * segment->slice_count);
713 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid)
715 MXFIndexTableSegment *segment = arg;
718 segment->edit_unit_byte_count = avio_rb32(pb);
719 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
722 segment->index_sid = avio_rb32(pb);
723 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
726 segment->body_sid = avio_rb32(pb);
727 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
730 segment->slice_count = avio_r8(pb);
731 av_dlog(NULL, "SliceCount %d\n", segment->slice_count);
734 av_dlog(NULL, "DeltaEntryArray found\n");
735 return mxf_read_delta_entry_array(pb, segment);
737 av_dlog(NULL, "IndexEntryArray found\n");
738 return mxf_read_index_entry_array(pb, segment);
740 segment->index_edit_rate.num = avio_rb32(pb);
741 segment->index_edit_rate.den = avio_rb32(pb);
742 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
743 segment->index_edit_rate.den);
746 segment->index_start_position = avio_rb64(pb);
747 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
750 segment->index_duration = avio_rb64(pb);
751 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
757 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
759 int code, value, ofs = 0;
760 char layout[16] = {0};
765 av_dlog(NULL, "pixel layout: code %#x\n", code);
768 layout[ofs++] = code;
769 layout[ofs++] = value;
771 } while (code != 0); /* SMPTE 377M E.2.46 */
773 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
776 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid)
778 MXFDescriptor *descriptor = arg;
781 descriptor->sub_descriptors_count = avio_rb32(pb);
782 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
784 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
785 if (!descriptor->sub_descriptors_refs)
787 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
788 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
791 avio_read(pb, descriptor->essence_container_ul, 16);
794 descriptor->linked_track_id = avio_rb32(pb);
796 case 0x3201: /* PictureEssenceCoding */
797 avio_read(pb, descriptor->essence_codec_ul, 16);
800 descriptor->width = avio_rb32(pb);
803 descriptor->height = avio_rb32(pb);
806 descriptor->aspect_ratio.num = avio_rb32(pb);
807 descriptor->aspect_ratio.den = avio_rb32(pb);
810 descriptor->sample_rate.num = avio_rb32(pb);
811 descriptor->sample_rate.den = avio_rb32(pb);
813 case 0x3D06: /* SoundEssenceCompression */
814 avio_read(pb, descriptor->essence_codec_ul, 16);
817 descriptor->channels = avio_rb32(pb);
820 descriptor->bits_per_sample = avio_rb32(pb);
823 mxf_read_pixel_layout(pb, descriptor);
826 /* Private uid used by SONY C0023S01.mxf */
827 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
828 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
829 if (!descriptor->extradata)
831 descriptor->extradata_size = size;
832 avio_read(pb, descriptor->extradata, size);
840 * Match an uid independently of the version byte and up to len common bytes
843 static int mxf_match_uid(const UID key, const UID uid, int len)
846 for (i = 0; i < len; i++) {
847 if (i != 7 && key[i] != uid[i])
853 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
855 while (uls->uid[0]) {
856 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
863 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
869 for (i = 0; i < mxf->metadata_sets_count; i++) {
870 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
871 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
872 return mxf->metadata_sets[i];
878 static const MXFCodecUL mxf_essence_container_uls[] = {
879 // video essence container uls
880 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
881 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
882 // sound essence container uls
883 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
884 { { 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 */
885 { { 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 */
886 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
887 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
890 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
892 int i, j, nb_segments = 0;
893 MXFIndexTableSegment **unsorted_segments;
894 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
896 /* count number of segments, allocate arrays and copy unsorted segments */
897 for (i = 0; i < mxf->metadata_sets_count; i++)
898 if (mxf->metadata_sets[i]->type == IndexTableSegment)
901 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
902 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
903 av_free(unsorted_segments);
904 return AVERROR(ENOMEM);
907 for (i = j = 0; i < mxf->metadata_sets_count; i++)
908 if (mxf->metadata_sets[i]->type == IndexTableSegment)
909 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
911 *nb_sorted_segments = 0;
913 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
914 for (i = 0; i < nb_segments; i++) {
915 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
917 for (j = 0; j < nb_segments; j++) {
918 MXFIndexTableSegment *s = unsorted_segments[j];
920 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
921 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
923 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
924 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
926 best_body_sid = s->body_sid;
927 best_index_sid = s->index_sid;
928 best_index_start = s->index_start_position;
932 /* no suitable entry found -> we're done */
936 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
937 last_body_sid = best_body_sid;
938 last_index_sid = best_index_sid;
939 last_index_start = best_index_start;
942 av_free(unsorted_segments);
947 static int mxf_parse_index(MXFContext *mxf, int i, AVStream *st)
949 int64_t accumulated_offset = 0;
950 int j, k, ret, nb_sorted_segments;
951 MXFIndexTableSegment **sorted_segments;
953 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)))
956 for (j = 0; j < nb_sorted_segments; j++) {
958 int duration, sample_duration = 1, last_sample_size = 0;
959 int64_t segment_size;
960 MXFIndexTableSegment *tableseg = sorted_segments[j];
962 /* reset accumulated_offset on BodySID change */
963 if (j > 0 && tableseg->body_sid != sorted_segments[j-1]->body_sid)
964 accumulated_offset = 0;
966 /* HACK: How to correctly link between streams and slices? */
967 if (i < mxf->system_item + st->index)
969 if (n_delta >= tableseg->nb_delta_entries && st->index != 0)
971 duration = tableseg->index_duration > 0 ? tableseg->index_duration :
972 st->duration - st->nb_index_entries;
973 segment_size = tableseg->edit_unit_byte_count * duration;
974 /* check small EditUnitByteCount for audio */
975 if (tableseg->edit_unit_byte_count && tableseg->edit_unit_byte_count < 32
976 && !tableseg->index_duration) {
977 /* duration might be prime relative to the new sample_duration,
978 * which means we need to handle the last frame differently */
979 sample_duration = 8192;
980 last_sample_size = (duration % sample_duration) * tableseg->edit_unit_byte_count;
981 tableseg->edit_unit_byte_count *= sample_duration;
982 duration /= sample_duration;
983 if (last_sample_size) duration++;
986 for (k = 0; k < duration; k++) {
990 if (k < tableseg->nb_index_entries) {
991 pos = tableseg->stream_offset_entries[k];
992 if (n_delta < tableseg->nb_delta_entries) {
993 if (n_delta < tableseg->nb_delta_entries - 1) {
995 tableseg->slice_offset_entries[k][tableseg->slice[n_delta+1]-1] +
996 tableseg->element_delta[n_delta+1] -
997 tableseg->element_delta[n_delta];
998 if (tableseg->slice[n_delta] > 0)
999 size -= tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
1000 } else if (k < duration - 1) {
1001 size = tableseg->stream_offset_entries[k+1] -
1002 tableseg->stream_offset_entries[k] -
1003 tableseg->slice_offset_entries[k][tableseg->slice[tableseg->nb_delta_entries-1]-1] -
1004 tableseg->element_delta[tableseg->nb_delta_entries-1];
1007 if (tableseg->slice[n_delta] > 0)
1008 pos += tableseg->slice_offset_entries[k][tableseg->slice[n_delta]-1];
1009 pos += tableseg->element_delta[n_delta];
1012 flags = !(tableseg->flag_entries[k] & 0x30) ? AVINDEX_KEYFRAME : 0;
1014 pos = (int64_t)k * tableseg->edit_unit_byte_count + accumulated_offset;
1015 if (n_delta < tableseg->nb_delta_entries - 1)
1016 size = tableseg->element_delta[n_delta+1] - tableseg->element_delta[n_delta];
1018 /* use smaller size for last sample if we should */
1019 if (last_sample_size && k == duration - 1)
1020 size = last_sample_size;
1022 size = tableseg->edit_unit_byte_count;
1023 if (tableseg->nb_delta_entries)
1024 size -= tableseg->element_delta[tableseg->nb_delta_entries-1];
1026 if (n_delta < tableseg->nb_delta_entries)
1027 pos += tableseg->element_delta[n_delta];
1028 flags = AVINDEX_KEYFRAME;
1031 if (k > 0 && pos < mxf->first_essence_length && accumulated_offset == 0)
1032 pos += mxf->first_essence_kl_length;
1034 pos += mxf->essence_offset;
1036 av_dlog(mxf->fc, "Stream %d IndexEntry %d n_Delta %d Offset %"PRIx64" Timestamp %"PRId64"\n",
1037 st->index, st->nb_index_entries, n_delta, pos, sample_duration * st->nb_index_entries);
1039 if ((ret = av_add_index_entry(st, pos, sample_duration * st->nb_index_entries, size, 0, flags)) < 0)
1042 accumulated_offset += segment_size;
1045 av_free(sorted_segments);
1050 static int mxf_parse_structural_metadata(MXFContext *mxf)
1052 MXFPackage *material_package = NULL;
1053 MXFPackage *temp_package = NULL;
1056 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1057 /* TODO: handle multiple material packages (OP3x) */
1058 for (i = 0; i < mxf->packages_count; i++) {
1059 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1060 if (material_package) break;
1062 if (!material_package) {
1063 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1067 for (i = 0; i < material_package->tracks_count; i++) {
1068 MXFPackage *source_package = NULL;
1069 MXFTrack *material_track = NULL;
1070 MXFTrack *source_track = NULL;
1071 MXFTrack *temp_track = NULL;
1072 MXFDescriptor *descriptor = NULL;
1073 MXFStructuralComponent *component = NULL;
1074 UID *essence_container_ul = NULL;
1075 const MXFCodecUL *codec_ul = NULL;
1076 const MXFCodecUL *container_ul = NULL;
1079 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1080 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1084 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1085 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1089 /* TODO: handle multiple source clips */
1090 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1091 /* TODO: handle timecode component */
1092 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1096 for (k = 0; k < mxf->packages_count; k++) {
1097 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1100 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1101 source_package = temp_package;
1105 if (!source_package) {
1106 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
1109 for (k = 0; k < source_package->tracks_count; k++) {
1110 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1111 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1114 if (temp_track->track_id == component->source_track_id) {
1115 source_track = temp_track;
1119 if (!source_track) {
1120 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1127 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1128 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1132 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1133 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1134 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1135 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1139 st = avformat_new_stream(mxf->fc, NULL);
1141 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1144 st->id = source_track->track_id;
1145 st->priv_data = source_track;
1146 st->duration = component->duration;
1147 if (st->duration == -1)
1148 st->duration = AV_NOPTS_VALUE;
1149 st->start_time = component->start_position;
1150 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1152 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1153 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1154 st->codec->codec_type = codec_ul->id;
1156 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1157 if (source_package->descriptor) {
1158 if (source_package->descriptor->type == MultipleDescriptor) {
1159 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1160 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1162 if (!sub_descriptor) {
1163 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1166 if (sub_descriptor->linked_track_id == source_track->track_id) {
1167 descriptor = sub_descriptor;
1171 } else if (source_package->descriptor->type == Descriptor)
1172 descriptor = source_package->descriptor;
1175 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1178 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1179 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1180 essence_container_ul = &descriptor->essence_container_ul;
1181 /* HACK: replacing the original key with mxf_encrypted_essence_container
1182 * is not allowed according to s429-6, try to find correct information anyway */
1183 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1184 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1185 for (k = 0; k < mxf->metadata_sets_count; k++) {
1186 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1187 if (metadata->type == CryptoContext) {
1188 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1193 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1194 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1195 st->codec->codec_id = codec_ul->id;
1196 if (descriptor->extradata) {
1197 st->codec->extradata = descriptor->extradata;
1198 st->codec->extradata_size = descriptor->extradata_size;
1200 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1201 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
1202 if (st->codec->codec_id == CODEC_ID_NONE)
1203 st->codec->codec_id = container_ul->id;
1204 st->codec->width = descriptor->width;
1205 st->codec->height = descriptor->height;
1206 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1207 st->codec->pix_fmt = descriptor->pix_fmt;
1208 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1209 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1210 container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
1211 if (st->codec->codec_id == CODEC_ID_NONE)
1212 st->codec->codec_id = container_ul->id;
1213 st->codec->channels = descriptor->channels;
1214 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1215 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1216 /* TODO: implement CODEC_ID_RAWAUDIO */
1217 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1218 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1219 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1220 else if (descriptor->bits_per_sample == 32)
1221 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1222 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1223 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1224 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1225 else if (descriptor->bits_per_sample == 32)
1226 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1227 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1228 st->need_parsing = AVSTREAM_PARSE_FULL;
1231 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1232 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
1233 st->need_parsing = AVSTREAM_PARSE_FULL;
1236 if ((ret = mxf_parse_index(mxf, i, st)))
1242 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1243 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1244 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1245 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1246 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1247 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1248 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1249 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1250 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1251 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1252 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1253 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1254 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1255 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1256 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1257 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1258 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1259 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1260 { { 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 */
1261 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1262 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1263 { { 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 */
1264 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1265 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1266 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1267 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1268 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1269 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1270 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1273 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1275 AVIOContext *pb = mxf->fc->pb;
1276 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1277 uint64_t klv_end = avio_tell(pb) + klv->length;
1281 while (avio_tell(pb) + 4 < klv_end) {
1282 int tag = avio_rb16(pb);
1283 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1284 uint64_t next = avio_tell(pb) + size;
1287 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1288 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1289 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1292 if (tag > 0x7FFF) { /* dynamic tag */
1294 for (i = 0; i < mxf->local_tags_count; i++) {
1295 int local_tag = AV_RB16(mxf->local_tags+i*18);
1296 if (local_tag == tag) {
1297 memcpy(uid, mxf->local_tags+i*18+2, 16);
1298 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1299 PRINT_KEY(mxf->fc, "uid", uid);
1303 if (ctx_size && tag == 0x3C0A)
1304 avio_read(pb, ctx->uid, 16);
1305 else if (read_child(ctx, pb, tag, size, uid) < 0)
1308 avio_seek(pb, next, SEEK_SET);
1310 if (ctx_size) ctx->type = type;
1311 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1315 * Seeks to the previous partition, if possible
1316 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1318 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1320 AVIOContext *pb = mxf->fc->pb;
1322 if (!mxf->current_partition ||
1323 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1324 return 0; /* we've parsed all partitions */
1326 /* seek to previous partition */
1327 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1328 mxf->current_partition = NULL;
1330 av_dlog(mxf->fc, "seeking to previous partition\n");
1336 * Called when essence is encountered
1337 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1339 static int mxf_parse_handle_essence(MXFContext *mxf)
1341 AVIOContext *pb = mxf->fc->pb;
1344 if (!mxf->current_partition) {
1345 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to PartitionPack\n");
1346 return AVERROR_INVALIDDATA;
1349 if (mxf->parsing_backward) {
1350 return mxf_seek_to_previous_partition(mxf);
1352 if (!mxf->footer_partition) {
1353 av_dlog(mxf->fc, "no footer\n");
1357 av_dlog(mxf->fc, "seeking to footer\n");
1359 /* remember where we were so we don't end up seeking further back than this */
1360 mxf->last_forward_tell = avio_tell(pb);
1362 if (!pb->seekable) {
1363 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1367 /* seek to footer partition and parse backward */
1368 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1369 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1370 mxf->run_in + mxf->footer_partition, ret);
1374 mxf->current_partition = NULL;
1375 mxf->parsing_backward = 1;
1382 * Called when the next partition or EOF is encountered
1383 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1385 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1387 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1390 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
1392 MXFContext *mxf = s->priv_data;
1395 mxf->last_forward_tell = INT64_MAX;
1397 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1398 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1401 avio_seek(s->pb, -14, SEEK_CUR);
1403 mxf->run_in = avio_tell(s->pb);
1405 while (!url_feof(s->pb)) {
1406 const MXFMetadataReadTableEntry *metadata;
1408 if (klv_read_packet(&klv, s->pb) < 0) {
1409 /* EOF - seek to previous partition or stop */
1410 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1416 PRINT_KEY(s, "read header", klv.key);
1417 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1418 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1419 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1420 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1421 if (IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1422 mxf->system_item = 1;
1425 if (!mxf->essence_offset)
1426 mxf->essence_offset = klv.offset;
1428 if (!mxf->first_essence_kl_length && IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
1429 mxf->first_essence_kl_length = avio_tell(s->pb) - klv.offset;
1430 mxf->first_essence_length = klv.length;
1433 /* seek to footer, previous partition or stop */
1434 if (mxf_parse_handle_essence(mxf) <= 0)
1437 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1438 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1439 /* next partition pack - keep going, seek to previous partition or stop */
1440 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1444 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1445 if (IS_KLV_KEY(klv.key, metadata->key)) {
1447 if (klv.key[5] == 0x53) {
1448 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1450 uint64_t next = avio_tell(s->pb) + klv.length;
1451 res = metadata->read(mxf, s->pb, 0, 0, klv.key);
1452 avio_seek(s->pb, next, SEEK_SET);
1455 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1461 if (!metadata->read)
1462 avio_skip(s->pb, klv.length);
1464 /* FIXME avoid seek */
1465 if (!mxf->essence_offset) {
1466 av_log(s, AV_LOG_ERROR, "no essence\n");
1467 return AVERROR_INVALIDDATA;
1469 avio_seek(s->pb, mxf->essence_offset, SEEK_SET);
1470 return mxf_parse_structural_metadata(mxf);
1473 static int mxf_read_close(AVFormatContext *s)
1475 MXFContext *mxf = s->priv_data;
1476 MXFIndexTableSegment *seg;
1479 av_freep(&mxf->packages_refs);
1481 for (i = 0; i < s->nb_streams; i++)
1482 s->streams[i]->priv_data = NULL;
1484 for (i = 0; i < mxf->metadata_sets_count; i++) {
1485 switch (mxf->metadata_sets[i]->type) {
1486 case MultipleDescriptor:
1487 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1490 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1493 case MaterialPackage:
1494 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1496 case IndexTableSegment:
1497 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1498 for (j = 0; j < seg->nb_index_entries; j++)
1499 av_freep(&seg->slice_offset_entries[j]);
1500 av_freep(&seg->slice);
1501 av_freep(&seg->element_delta);
1502 av_freep(&seg->flag_entries);
1503 av_freep(&seg->stream_offset_entries);
1504 av_freep(&seg->slice_offset_entries);
1509 av_freep(&mxf->metadata_sets[i]);
1511 av_freep(&mxf->partitions);
1512 av_freep(&mxf->metadata_sets);
1513 av_freep(&mxf->aesc);
1514 av_freep(&mxf->local_tags);
1518 static int mxf_probe(AVProbeData *p) {
1519 uint8_t *bufp = p->buf;
1520 uint8_t *end = p->buf + p->buf_size;
1522 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1525 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1526 end -= sizeof(mxf_header_partition_pack_key);
1527 for (; bufp < end; bufp++) {
1528 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1529 return AVPROBE_SCORE_MAX;
1534 /* rudimentary byte seek */
1535 /* XXX: use MXF Index */
1536 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1538 AVStream *st = s->streams[stream_index];
1543 if (sample_time < 0)
1545 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1546 if (avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET) < 0)
1548 ff_update_cur_dts(s, st, sample_time);
1552 AVInputFormat ff_mxf_demuxer = {
1554 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1555 .priv_data_size = sizeof(MXFContext),
1556 .read_probe = mxf_probe,
1557 .read_header = mxf_read_header,
1558 .read_packet = mxf_read_packet,
1559 .read_close = mxf_read_close,
1560 .read_seek = mxf_read_seek,