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"
72 OPSONYOpt, /* FATE sample, violates the spec in places */
78 MXFPartitionType type;
79 uint64_t previous_partition;
82 int64_t this_partition;
83 int64_t essence_offset; /* absolute offset of essence */
84 int64_t essence_length;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
103 int64_t start_position;
105 } MXFStructuralComponent;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
118 enum MXFMetadataSetType type;
119 MXFSequence *sequence; /* mandatory, and only one */
122 uint8_t track_number[4];
123 AVRational edit_rate;
128 enum MXFMetadataSetType type;
129 UID essence_container_ul;
130 UID essence_codec_ul;
131 AVRational sample_rate;
132 AVRational aspect_ratio;
137 UID *sub_descriptors_refs;
138 int sub_descriptors_count;
142 enum PixelFormat pix_fmt;
147 enum MXFMetadataSetType type;
148 int edit_unit_byte_count;
151 AVRational index_edit_rate;
152 uint64_t index_start_position;
153 uint64_t index_duration;
154 int8_t *temporal_offset_entries;
156 uint64_t *stream_offset_entries;
157 int nb_index_entries;
158 } MXFIndexTableSegment;
162 enum MXFMetadataSetType type;
166 MXFDescriptor *descriptor; /* only one */
172 enum MXFMetadataSetType type;
175 /* decoded index table */
179 int nb_ptses; /* number of PTSes or total duration of index */
180 int64_t first_dts; /* DTS = EditUnit + first_dts */
181 int64_t *ptses; /* maps EditUnit -> PTS */
183 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
184 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
188 MXFPartition *partitions;
189 unsigned partitions_count;
193 MXFMetadataSet **metadata_sets;
194 int metadata_sets_count;
198 int local_tags_count;
199 uint64_t footer_partition;
200 KLVPacket current_klv_data;
201 int current_klv_index;
203 MXFPartition *current_partition;
204 int parsing_backward;
205 int64_t last_forward_tell;
206 int last_forward_partition;
207 int current_edit_unit;
209 MXFIndexTable *index_tables;
212 enum MXFWrappingScheme {
217 /* NOTE: klv_offset is not set (-1) for local keys */
218 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
222 MXFMetadataReadFunc *read;
224 enum MXFMetadataSetType type;
225 } MXFMetadataReadTableEntry;
227 /* partial keys to match */
228 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
229 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
230 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
231 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
232 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
233 /* complete keys to match */
234 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 };
235 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
236 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
237 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
239 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
241 static int64_t klv_decode_ber_length(AVIOContext *pb)
243 uint64_t size = avio_r8(pb);
244 if (size & 0x80) { /* long form */
245 int bytes_num = size & 0x7f;
246 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
251 size = size << 8 | avio_r8(pb);
256 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
259 for (i = 0; i < size && !url_feof(pb); i++) {
263 else if (b != key[i])
269 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
271 if (!mxf_read_sync(pb, mxf_klv_key, 4))
273 klv->offset = avio_tell(pb) - 4;
274 memcpy(klv->key, mxf_klv_key, 4);
275 avio_read(pb, klv->key + 4, 12);
276 klv->length = klv_decode_ber_length(pb);
277 return klv->length == -1 ? -1 : 0;
280 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
284 for (i = 0; i < s->nb_streams; i++) {
285 MXFTrack *track = s->streams[i]->priv_data;
287 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
290 /* return 0 if only one stream, for OP Atom files with 0 as track number */
291 return s->nb_streams == 1 ? 0 : -1;
294 /* XXX: use AVBitStreamFilter */
295 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
297 const uint8_t *buf_ptr, *end_ptr;
301 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
303 length = av_get_packet(pb, pkt, length);
306 data_ptr = pkt->data;
307 end_ptr = pkt->data + length;
308 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
309 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
310 for (i = 0; i < st->codec->channels; i++) {
311 uint32_t sample = bytestream_get_le32(&buf_ptr);
312 if (st->codec->bits_per_coded_sample == 24)
313 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
315 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
317 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
319 av_shrink_packet(pkt, data_ptr - pkt->data);
323 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
325 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
326 MXFContext *mxf = s->priv_data;
327 AVIOContext *pb = s->pb;
328 int64_t end = avio_tell(pb) + klv->length;
331 uint64_t plaintext_size;
336 if (!mxf->aesc && s->key && s->keylen == 16) {
337 mxf->aesc = av_malloc(av_aes_size);
340 av_aes_init(mxf->aesc, s->key, 128, 1);
343 avio_skip(pb, klv_decode_ber_length(pb));
345 klv_decode_ber_length(pb);
346 plaintext_size = avio_rb64(pb);
348 klv_decode_ber_length(pb);
349 avio_read(pb, klv->key, 16);
350 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
352 index = mxf_get_stream_index(s, klv);
356 klv_decode_ber_length(pb);
357 orig_size = avio_rb64(pb);
358 if (orig_size < plaintext_size)
361 size = klv_decode_ber_length(pb);
362 if (size < 32 || size - 32 < orig_size)
364 avio_read(pb, ivec, 16);
365 avio_read(pb, tmpbuf, 16);
367 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
368 if (memcmp(tmpbuf, checkv, 16))
369 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
371 size = av_get_packet(pb, pkt, size);
374 else if (size < plaintext_size)
375 return AVERROR_INVALIDDATA;
376 size -= plaintext_size;
378 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
379 &pkt->data[plaintext_size], size >> 4, ivec, 1);
380 av_shrink_packet(pkt, orig_size);
381 pkt->stream_index = index;
382 avio_skip(pb, end - avio_tell(pb));
386 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
388 MXFContext *mxf = arg;
389 int item_num = avio_rb32(pb);
390 int item_len = avio_rb32(pb);
392 if (item_len != 18) {
393 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
396 if (item_num > UINT_MAX / item_len)
398 mxf->local_tags_count = item_num;
399 mxf->local_tags = av_malloc(item_num*item_len);
400 if (!mxf->local_tags)
402 avio_read(pb, mxf->local_tags, item_num*item_len);
406 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
408 MXFContext *mxf = arg;
409 MXFPartition *partition;
411 uint64_t footer_partition;
413 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
414 return AVERROR(ENOMEM);
416 mxf->partitions = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
417 if (!mxf->partitions)
418 return AVERROR(ENOMEM);
420 if (mxf->parsing_backward) {
421 /* insert the new partition pack in the middle
422 * this makes the entries in mxf->partitions sorted by offset */
423 memmove(&mxf->partitions[mxf->last_forward_partition+1],
424 &mxf->partitions[mxf->last_forward_partition],
425 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
426 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
428 mxf->last_forward_partition++;
429 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
432 memset(partition, 0, sizeof(*partition));
433 mxf->partitions_count++;
434 partition->pack_length = avio_tell(pb) - klv_offset + size;
438 partition->type = Header;
441 partition->type = BodyPartition;
444 partition->type = Footer;
447 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
448 return AVERROR_INVALIDDATA;
451 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
452 partition->closed = partition->type == Footer || !(uid[14] & 1);
453 partition->complete = uid[14] > 2;
455 partition->kag_size = avio_rb32(pb);
456 partition->this_partition = avio_rb64(pb);
457 partition->previous_partition = avio_rb64(pb);
458 footer_partition = avio_rb64(pb);
459 partition->header_byte_count = avio_rb64(pb);
460 partition->index_byte_count = avio_rb64(pb);
461 partition->index_sid = avio_rb32(pb);
463 partition->body_sid = avio_rb32(pb);
464 avio_read(pb, op, sizeof(UID));
466 /* some files don'thave FooterPartition set in every partition */
467 if (footer_partition) {
468 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
469 av_log(mxf->fc, AV_LOG_ERROR, "inconsistent FooterPartition value: %li != %li\n",
470 mxf->footer_partition, footer_partition);
472 mxf->footer_partition = footer_partition;
476 av_dlog(mxf->fc, "PartitionPack: ThisPartition = 0x%lx, PreviousPartition = 0x%lx, "
477 "FooterPartition = 0x%lx, IndexSID = %i, BodySID = %i\n",
478 partition->this_partition,
479 partition->previous_partition, footer_partition,
480 partition->index_sid, partition->body_sid);
482 /* sanity check PreviousPartition if set */
483 if (partition->previous_partition &&
484 mxf->run_in + partition->previous_partition >= klv_offset) {
485 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition points to this partition or forward\n");
486 return AVERROR_INVALIDDATA;
489 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
490 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
491 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
492 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
493 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
494 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
495 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
496 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
497 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
498 else if (op[12] == 0x10) mxf->op = OPAtom;
499 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
501 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
505 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
506 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
508 if (mxf->op == OPSONYOpt)
509 partition->kag_size = 512;
511 partition->kag_size = 1;
513 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
519 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
521 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
522 return AVERROR(ENOMEM);
523 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
524 if (!mxf->metadata_sets)
526 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
527 mxf->metadata_sets_count++;
531 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
533 MXFCryptoContext *cryptocontext = arg;
536 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
537 avio_read(pb, cryptocontext->source_container_ul, 16);
541 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
543 MXFContext *mxf = arg;
546 mxf->packages_count = avio_rb32(pb);
547 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
549 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
550 if (!mxf->packages_refs)
552 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
553 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
559 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
561 MXFStructuralComponent *source_clip = arg;
564 source_clip->duration = avio_rb64(pb);
567 source_clip->start_position = avio_rb64(pb);
570 /* UMID, only get last 16 bytes */
572 avio_read(pb, source_clip->source_package_uid, 16);
575 source_clip->source_track_id = avio_rb32(pb);
581 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
583 MXFPackage *package = arg;
586 package->tracks_count = avio_rb32(pb);
587 if (package->tracks_count >= UINT_MAX / sizeof(UID))
589 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
590 if (!package->tracks_refs)
592 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
593 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
599 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
601 MXFTrack *track = arg;
604 track->track_id = avio_rb32(pb);
607 avio_read(pb, track->track_number, 4);
610 track->edit_rate.den = avio_rb32(pb);
611 track->edit_rate.num = avio_rb32(pb);
614 avio_read(pb, track->sequence_ref, 16);
620 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
622 MXFSequence *sequence = arg;
625 sequence->duration = avio_rb64(pb);
628 avio_read(pb, sequence->data_definition_ul, 16);
631 sequence->structural_components_count = avio_rb32(pb);
632 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
634 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
635 if (!sequence->structural_components_refs)
637 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
638 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
644 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
646 MXFPackage *package = arg;
649 package->tracks_count = avio_rb32(pb);
650 if (package->tracks_count >= UINT_MAX / sizeof(UID))
652 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
653 if (!package->tracks_refs)
655 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
656 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
659 /* UMID, only get last 16 bytes */
661 avio_read(pb, package->package_uid, 16);
664 avio_read(pb, package->descriptor_ref, 16);
670 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
674 segment->nb_index_entries = avio_rb32(pb);
675 length = avio_rb32(pb);
677 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
678 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
679 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
680 return AVERROR(ENOMEM);
682 for (i = 0; i < segment->nb_index_entries; i++) {
683 segment->temporal_offset_entries[i] = avio_r8(pb);
684 avio_r8(pb); /* KeyFrameOffset */
685 segment->flag_entries[i] = avio_r8(pb);
686 segment->stream_offset_entries[i] = avio_rb64(pb);
687 avio_skip(pb, length - 11);
692 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
694 MXFIndexTableSegment *segment = arg;
697 segment->edit_unit_byte_count = avio_rb32(pb);
698 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
701 segment->index_sid = avio_rb32(pb);
702 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
705 segment->body_sid = avio_rb32(pb);
706 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
709 av_dlog(NULL, "IndexEntryArray found\n");
710 return mxf_read_index_entry_array(pb, segment);
712 segment->index_edit_rate.num = avio_rb32(pb);
713 segment->index_edit_rate.den = avio_rb32(pb);
714 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
715 segment->index_edit_rate.den);
718 segment->index_start_position = avio_rb64(pb);
719 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
722 segment->index_duration = avio_rb64(pb);
723 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
729 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
731 int code, value, ofs = 0;
732 char layout[16] = {0};
737 av_dlog(NULL, "pixel layout: code %#x\n", code);
740 layout[ofs++] = code;
741 layout[ofs++] = value;
743 } while (code != 0); /* SMPTE 377M E.2.46 */
745 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
748 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
750 MXFDescriptor *descriptor = arg;
753 descriptor->sub_descriptors_count = avio_rb32(pb);
754 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
756 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
757 if (!descriptor->sub_descriptors_refs)
759 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
760 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
763 avio_read(pb, descriptor->essence_container_ul, 16);
766 descriptor->linked_track_id = avio_rb32(pb);
768 case 0x3201: /* PictureEssenceCoding */
769 avio_read(pb, descriptor->essence_codec_ul, 16);
772 descriptor->width = avio_rb32(pb);
775 descriptor->height = avio_rb32(pb);
778 descriptor->aspect_ratio.num = avio_rb32(pb);
779 descriptor->aspect_ratio.den = avio_rb32(pb);
782 descriptor->sample_rate.num = avio_rb32(pb);
783 descriptor->sample_rate.den = avio_rb32(pb);
785 case 0x3D06: /* SoundEssenceCompression */
786 avio_read(pb, descriptor->essence_codec_ul, 16);
789 descriptor->channels = avio_rb32(pb);
792 descriptor->bits_per_sample = avio_rb32(pb);
795 mxf_read_pixel_layout(pb, descriptor);
798 /* Private uid used by SONY C0023S01.mxf */
799 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
800 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
801 if (!descriptor->extradata)
803 descriptor->extradata_size = size;
804 avio_read(pb, descriptor->extradata, size);
812 * Match an uid independently of the version byte and up to len common bytes
815 static int mxf_match_uid(const UID key, const UID uid, int len)
818 for (i = 0; i < len; i++) {
819 if (i != 7 && key[i] != uid[i])
825 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
827 while (uls->uid[0]) {
828 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
835 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
841 for (i = 0; i < mxf->metadata_sets_count; i++) {
842 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
843 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
844 return mxf->metadata_sets[i];
850 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
851 // video essence container uls
852 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
853 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
854 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
856 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
857 // sound essence container uls
858 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
859 { { 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 */
860 { { 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 */
861 { { 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 */
862 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
865 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
867 int i, j, nb_segments = 0;
868 MXFIndexTableSegment **unsorted_segments;
869 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
871 /* count number of segments, allocate arrays and copy unsorted segments */
872 for (i = 0; i < mxf->metadata_sets_count; i++)
873 if (mxf->metadata_sets[i]->type == IndexTableSegment)
876 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
877 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
878 av_free(unsorted_segments);
879 return AVERROR(ENOMEM);
882 for (i = j = 0; i < mxf->metadata_sets_count; i++)
883 if (mxf->metadata_sets[i]->type == IndexTableSegment)
884 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
886 *nb_sorted_segments = 0;
888 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
889 for (i = 0; i < nb_segments; i++) {
890 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
892 for (j = 0; j < nb_segments; j++) {
893 MXFIndexTableSegment *s = unsorted_segments[j];
895 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
896 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
898 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
899 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
901 best_body_sid = s->body_sid;
902 best_index_sid = s->index_sid;
903 best_index_start = s->index_start_position;
907 /* no suitable entry found -> we're done */
911 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
912 last_body_sid = best_body_sid;
913 last_index_sid = best_index_sid;
914 last_index_start = best_index_start;
917 av_free(unsorted_segments);
923 * Computes the absolute file offset of the given essence container offset
925 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
928 int64_t offset_in = offset; /* for logging */
930 for (x = 0; x < mxf->partitions_count; x++) {
931 MXFPartition *p = &mxf->partitions[x];
933 if (p->body_sid != body_sid)
936 if (offset < p->essence_length || !p->essence_length) {
937 *offset_out = p->essence_offset + offset;
941 offset -= p->essence_length;
944 av_log(mxf->fc, AV_LOG_ERROR, "failed to find absolute offset of %lx in BodySID %i - partial file?\n",
945 offset_in, body_sid);
947 return AVERROR_INVALIDDATA;
951 * Returns the end position of the essence container with given BodySID, or zero if unknown
953 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
958 for (x = 0; x < mxf->partitions_count; x++) {
959 MXFPartition *p = &mxf->partitions[x];
961 if (p->body_sid != body_sid)
964 if (!p->essence_length)
967 ret = p->essence_offset + p->essence_length;
973 /* EditUnit -> absolute offset */
974 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
979 for (i = 0; i < index_table->nb_segments; i++) {
980 MXFIndexTableSegment *s = index_table->segments[i];
982 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
984 if (edit_unit < s->index_start_position + s->index_duration) {
985 int64_t index = edit_unit - s->index_start_position;
987 if (s->edit_unit_byte_count)
988 offset_temp += s->edit_unit_byte_count * index;
989 else if (s->nb_index_entries) {
990 if (s->nb_index_entries == 2 * s->index_duration + 1)
991 index *= 2; /* Avid index */
993 if (index < 0 || index > s->nb_index_entries) {
994 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
995 index_table->index_sid, s->index_start_position);
996 return AVERROR_INVALIDDATA;
999 offset_temp = s->stream_offset_entries[index];
1001 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1002 index_table->index_sid, s->index_start_position);
1003 return AVERROR_INVALIDDATA;
1007 *edit_unit_out = edit_unit;
1009 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1011 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1012 offset_temp += s->edit_unit_byte_count * s->index_duration;
1017 av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid);
1019 return AVERROR_INVALIDDATA;
1022 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1025 int8_t max_temporal_offset = -128;
1027 /* first compute how many entries we have */
1028 for (i = 0; i < index_table->nb_segments; i++) {
1029 MXFIndexTableSegment *s = index_table->segments[i];
1031 if (!s->nb_index_entries) {
1032 index_table->nb_ptses = 0;
1033 return 0; /* no TemporalOffsets */
1036 index_table->nb_ptses += s->index_duration;
1039 /* paranoid check */
1040 if (index_table->nb_ptses <= 0)
1043 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1044 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1045 av_freep(&index_table->ptses);
1046 return AVERROR(ENOMEM);
1049 /* we may have a few bad TemporalOffsets
1050 * make sure the corresponding PTSes don't have the bogus value 0 */
1051 for (x = 0; x < index_table->nb_ptses; x++)
1052 index_table->ptses[x] = AV_NOPTS_VALUE;
1066 * We want to transform it into this:
1077 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1078 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1079 * The latter makes DTS <= PTS.
1081 for (i = x = 0; i < index_table->nb_segments; i++) {
1082 MXFIndexTableSegment *s = index_table->segments[i];
1083 int index_delta = 1;
1084 int n = s->nb_index_entries;
1086 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1087 index_delta = 2; /* Avid index */
1089 /* ignore the last entry - it's the size of the essence container */
1093 for (j = 0; j < n; j += index_delta, x++) {
1094 int offset = s->temporal_offset_entries[j] / index_delta;
1095 int index = x + offset;
1097 if (x >= index_table->nb_ptses) {
1098 av_log(mxf->fc, AV_LOG_ERROR, "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1099 s->nb_index_entries, s->index_duration);
1103 index_table->fake_index[x].timestamp = x;
1104 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1106 if (index < 0 || index >= index_table->nb_ptses) {
1107 av_log(mxf->fc, AV_LOG_ERROR,
1108 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1113 index_table->ptses[index] = x;
1114 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1118 index_table->first_dts = -max_temporal_offset;
1124 * Sorts and collects index table segments into index tables.
1125 * Also computes PTSes if possible.
1127 static int mxf_compute_index_tables(MXFContext *mxf)
1129 int i, j, k, ret, nb_sorted_segments;
1130 MXFIndexTableSegment **sorted_segments = NULL;
1132 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1133 nb_sorted_segments <= 0) {
1134 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1138 /* sanity check and count unique BodySIDs/IndexSIDs */
1139 for (i = 0; i < nb_sorted_segments; i++) {
1140 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1141 mxf->nb_index_tables++;
1142 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1143 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1144 ret = AVERROR_INVALIDDATA;
1145 goto finish_decoding_index;
1149 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1150 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1151 ret = AVERROR(ENOMEM);
1152 goto finish_decoding_index;
1155 /* distribute sorted segments to index tables */
1156 for (i = j = 0; i < nb_sorted_segments; i++) {
1157 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1162 mxf->index_tables[j].nb_segments++;
1165 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1166 MXFIndexTable *t = &mxf->index_tables[j];
1168 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1169 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1170 ret = AVERROR(ENOMEM);
1171 goto finish_decoding_index;
1174 if (sorted_segments[i]->index_start_position)
1175 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1176 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1178 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1179 t->index_sid = sorted_segments[i]->index_sid;
1180 t->body_sid = sorted_segments[i]->body_sid;
1182 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1183 goto finish_decoding_index;
1185 /* fix zero IndexDurations */
1186 for (k = 0; k < t->nb_segments; k++) {
1187 if (t->segments[k]->index_duration)
1190 if (t->nb_segments > 1)
1191 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1194 if (mxf->fc->nb_streams <= 0) {
1195 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1199 /* assume the first stream's duration is reasonable
1200 * leave index_duration = 0 on further segments in case we have any (unlikely)
1202 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1208 finish_decoding_index:
1209 av_free(sorted_segments);
1213 static int mxf_parse_structural_metadata(MXFContext *mxf)
1215 MXFPackage *material_package = NULL;
1216 MXFPackage *temp_package = NULL;
1219 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1220 /* TODO: handle multiple material packages (OP3x) */
1221 for (i = 0; i < mxf->packages_count; i++) {
1222 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1223 if (material_package) break;
1225 if (!material_package) {
1226 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1230 for (i = 0; i < material_package->tracks_count; i++) {
1231 MXFPackage *source_package = NULL;
1232 MXFTrack *material_track = NULL;
1233 MXFTrack *source_track = NULL;
1234 MXFTrack *temp_track = NULL;
1235 MXFDescriptor *descriptor = NULL;
1236 MXFStructuralComponent *component = NULL;
1237 UID *essence_container_ul = NULL;
1238 const MXFCodecUL *codec_ul = NULL;
1239 const MXFCodecUL *container_ul = NULL;
1242 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1243 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1247 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1248 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1252 /* TODO: handle multiple source clips */
1253 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1254 /* TODO: handle timecode component */
1255 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1259 for (k = 0; k < mxf->packages_count; k++) {
1260 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1263 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1264 source_package = temp_package;
1268 if (!source_package) {
1269 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1272 for (k = 0; k < source_package->tracks_count; k++) {
1273 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1274 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1278 if (temp_track->track_id == component->source_track_id) {
1279 source_track = temp_track;
1283 if (!source_track) {
1284 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1288 if (!source_track || !component)
1291 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1292 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1297 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1298 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1299 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1300 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1304 st = avformat_new_stream(mxf->fc, NULL);
1306 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1307 ret = AVERROR(ENOMEM);
1310 st->id = source_track->track_id;
1311 st->priv_data = source_track;
1312 st->duration = component->duration;
1313 if (st->duration == -1)
1314 st->duration = AV_NOPTS_VALUE;
1315 st->start_time = component->start_position;
1316 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1318 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1319 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1320 st->codec->codec_type = codec_ul->id;
1322 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1323 if (source_package->descriptor) {
1324 if (source_package->descriptor->type == MultipleDescriptor) {
1325 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1326 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1328 if (!sub_descriptor) {
1329 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1332 if (sub_descriptor->linked_track_id == source_track->track_id) {
1333 descriptor = sub_descriptor;
1337 } else if (source_package->descriptor->type == Descriptor)
1338 descriptor = source_package->descriptor;
1341 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1344 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1345 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1346 essence_container_ul = &descriptor->essence_container_ul;
1347 /* HACK: replacing the original key with mxf_encrypted_essence_container
1348 * is not allowed according to s429-6, try to find correct information anyway */
1349 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1350 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1351 for (k = 0; k < mxf->metadata_sets_count; k++) {
1352 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1353 if (metadata->type == CryptoContext) {
1354 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1360 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1361 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1362 st->codec->codec_id = codec_ul->id;
1363 if (descriptor->extradata) {
1364 st->codec->extradata = descriptor->extradata;
1365 st->codec->extradata_size = descriptor->extradata_size;
1367 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1368 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1369 if (st->codec->codec_id == CODEC_ID_NONE)
1370 st->codec->codec_id = container_ul->id;
1371 st->codec->width = descriptor->width;
1372 st->codec->height = descriptor->height;
1373 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1374 st->codec->pix_fmt = descriptor->pix_fmt;
1375 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1376 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1377 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1378 if (st->codec->codec_id == CODEC_ID_NONE)
1379 st->codec->codec_id = container_ul->id;
1380 st->codec->channels = descriptor->channels;
1381 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1382 if (descriptor->sample_rate.den > 0)
1383 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1384 /* TODO: implement CODEC_ID_RAWAUDIO */
1385 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1386 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1387 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1388 else if (descriptor->bits_per_sample == 32)
1389 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1390 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1391 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1392 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1393 else if (descriptor->bits_per_sample == 32)
1394 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1395 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1396 st->need_parsing = AVSTREAM_PARSE_FULL;
1399 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1400 /* TODO: decode timestamps */
1401 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1410 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1411 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1412 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1413 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1414 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1415 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1416 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1417 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1418 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1419 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1420 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1421 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1422 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1423 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1424 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1425 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1426 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1427 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1428 { { 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 */
1429 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1430 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1431 { { 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 */
1432 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1433 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1434 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1435 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1436 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1437 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1438 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1441 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1443 AVIOContext *pb = mxf->fc->pb;
1444 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1445 uint64_t klv_end = avio_tell(pb) + klv->length;
1449 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1450 int tag = avio_rb16(pb);
1451 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1452 uint64_t next = avio_tell(pb) + size;
1455 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1456 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1457 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1460 if (tag > 0x7FFF) { /* dynamic tag */
1462 for (i = 0; i < mxf->local_tags_count; i++) {
1463 int local_tag = AV_RB16(mxf->local_tags+i*18);
1464 if (local_tag == tag) {
1465 memcpy(uid, mxf->local_tags+i*18+2, 16);
1466 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1467 PRINT_KEY(mxf->fc, "uid", uid);
1471 if (ctx_size && tag == 0x3C0A)
1472 avio_read(pb, ctx->uid, 16);
1473 else if (read_child(ctx, pb, tag, size, uid, -1) < 0)
1476 /* accept the 64k local set limit being exceeded (Avid)
1477 * don't accept it extending past the end of the KLV though (zzuf5.mxf) */
1478 if (avio_tell(pb) > klv_end) {
1479 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1481 return AVERROR_INVALIDDATA;
1482 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1483 avio_seek(pb, next, SEEK_SET);
1485 if (ctx_size) ctx->type = type;
1486 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1490 * Seeks to the previous partition, if possible
1491 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1493 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1495 AVIOContext *pb = mxf->fc->pb;
1497 if (!mxf->current_partition ||
1498 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1499 return 0; /* we've parsed all partitions */
1501 /* seek to previous partition */
1502 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1503 mxf->current_partition = NULL;
1505 av_dlog(mxf->fc, "seeking to previous partition\n");
1511 * Called when essence is encountered
1512 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1514 static int mxf_parse_handle_essence(MXFContext *mxf)
1516 AVIOContext *pb = mxf->fc->pb;
1519 if (mxf->parsing_backward) {
1520 return mxf_seek_to_previous_partition(mxf);
1522 if (!mxf->footer_partition) {
1523 av_dlog(mxf->fc, "no footer\n");
1527 av_dlog(mxf->fc, "seeking to footer\n");
1529 /* remember where we were so we don't end up seeking further back than this */
1530 mxf->last_forward_tell = avio_tell(pb);
1532 if (!pb->seekable) {
1533 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1537 /* seek to footer partition and parse backward */
1538 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1539 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1540 mxf->run_in + mxf->footer_partition, ret);
1544 mxf->current_partition = NULL;
1545 mxf->parsing_backward = 1;
1552 * Called when the next partition or EOF is encountered
1553 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1555 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1557 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1561 * Figures out the proper offset and length of the essence container in each partition
1563 static void mxf_compute_essence_containers(MXFContext *mxf)
1567 /* everything is already correct */
1568 if (mxf->op == OPAtom)
1571 for (x = 0; x < mxf->partitions_count; x++) {
1572 MXFPartition *p = &mxf->partitions[x];
1575 continue; /* BodySID == 0 -> no essence */
1577 if (x >= mxf->partitions_count - 1)
1578 break; /* last partition - can't compute length (and we don't need to) */
1580 /* essence container spans to the next partition */
1581 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1583 if (p->essence_length < 0) {
1584 /* next ThisPartition < essence_offset */
1585 p->essence_length = 0;
1586 av_log(mxf->fc, AV_LOG_ERROR, "partition %i: bad ThisPartition = %lx\n",
1587 x+1, mxf->partitions[x+1].this_partition);
1592 static int64_t round_to_kag(int64_t position, int kag_size)
1594 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1595 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1596 int64_t ret = (position / kag_size) * kag_size;
1597 return ret == position ? ret : ret + kag_size;
1600 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
1602 MXFContext *mxf = s->priv_data;
1604 int64_t essence_offset = 0;
1607 mxf->last_forward_tell = INT64_MAX;
1609 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1610 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1613 avio_seek(s->pb, -14, SEEK_CUR);
1615 mxf->run_in = avio_tell(s->pb);
1617 while (!url_feof(s->pb)) {
1618 const MXFMetadataReadTableEntry *metadata;
1620 if (klv_read_packet(&klv, s->pb) < 0) {
1621 /* EOF - seek to previous partition or stop */
1622 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1628 PRINT_KEY(s, "read header", klv.key);
1629 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1630 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1631 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1632 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1633 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1635 if (!mxf->current_partition) {
1636 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1637 return AVERROR_INVALIDDATA;
1640 if (!mxf->current_partition->essence_offset) {
1641 /* for OP1a we compute essence_offset
1642 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1643 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1644 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1646 int64_t op1a_essence_offset =
1647 round_to_kag(mxf->current_partition->this_partition +
1648 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1649 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1650 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1652 if (mxf->op == OPAtom) {
1653 /* point essence_offset to the actual data
1654 * OPAtom has all the essence in one big KLV
1656 mxf->current_partition->essence_offset = avio_tell(s->pb);
1657 mxf->current_partition->essence_length = klv.length;
1659 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1660 mxf->current_partition->essence_offset = op1a_essence_offset;
1664 if (!essence_offset)
1665 essence_offset = klv.offset;
1667 /* seek to footer, previous partition or stop */
1668 if (mxf_parse_handle_essence(mxf) <= 0)
1671 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1672 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1673 /* next partition pack - keep going, seek to previous partition or stop */
1674 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1678 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1679 if (IS_KLV_KEY(klv.key, metadata->key)) {
1681 if (klv.key[5] == 0x53) {
1682 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1684 uint64_t next = avio_tell(s->pb) + klv.length;
1685 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1687 /* only seek forward, else this can loop for a long time */
1688 if (avio_tell(s->pb) > next) {
1689 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1691 return AVERROR_INVALIDDATA;
1694 avio_seek(s->pb, next, SEEK_SET);
1697 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1703 if (!metadata->read)
1704 avio_skip(s->pb, klv.length);
1706 /* FIXME avoid seek */
1707 if (!essence_offset) {
1708 av_log(s, AV_LOG_ERROR, "no essence\n");
1709 return AVERROR_INVALIDDATA;
1711 avio_seek(s->pb, essence_offset, SEEK_SET);
1713 mxf_compute_essence_containers(mxf);
1715 /* we need to do this before computing the index tables
1716 * to be able to fill in zero IndexDurations with st->duration */
1717 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1720 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1723 if (mxf->nb_index_tables > 1) {
1724 /* TODO: look up which IndexSID to use via EssenceContainerData */
1725 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1726 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1727 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1728 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1729 return AVERROR_INVALIDDATA;
1736 * Computes DTS and PTS for the given video packet based on its offset.
1738 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1740 int64_t last_ofs = -1, next_ofs;
1741 MXFIndexTable *t = &mxf->index_tables[0];
1743 /* this is called from the OP1a demuxing logic, which means there may be no index tables */
1744 if (mxf->nb_index_tables <= 0)
1747 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1748 while (mxf->current_edit_unit >= 0) {
1749 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1752 if (next_ofs <= last_ofs) {
1753 /* large next_ofs didn't change or current_edit_unit wrapped around
1754 * this fixes the infinite loop on zzuf3.mxf */
1755 av_log(mxf->fc, AV_LOG_ERROR, "next_ofs didn't change. not deriving packet timestamps\n");
1759 if (next_ofs > pkt->pos)
1762 last_ofs = next_ofs;
1763 mxf->current_edit_unit++;
1766 if (mxf->current_edit_unit < 0 || mxf->current_edit_unit >= t->nb_ptses)
1769 pkt->dts = mxf->current_edit_unit + t->first_dts;
1770 pkt->pts = t->ptses[mxf->current_edit_unit];
1773 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1777 while (!url_feof(s->pb)) {
1778 if (klv_read_packet(&klv, s->pb) < 0)
1780 PRINT_KEY(s, "read packet", klv.key);
1781 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1782 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1783 int res = mxf_decrypt_triplet(s, pkt, &klv);
1785 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1790 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1791 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1792 int index = mxf_get_stream_index(s, &klv);
1794 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1797 if (s->streams[index]->discard == AVDISCARD_ALL)
1799 /* check for 8 channels AES3 element */
1800 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1801 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1802 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1806 int ret = av_get_packet(s->pb, pkt, klv.length);
1810 pkt->stream_index = index;
1811 pkt->pos = klv.offset;
1813 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1814 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1819 avio_skip(s->pb, klv.length);
1824 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1826 MXFContext *mxf = s->priv_data;
1828 int64_t ret64, pos, next_pos;
1832 if (mxf->op != OPAtom)
1833 return mxf_read_packet_old(s, pkt);
1835 /* OPAtom - clip wrapped demuxing */
1836 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1838 t = &mxf->index_tables[0];
1840 if (mxf->current_edit_unit >= st->duration)
1843 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1846 /* compute size by finding the next edit unit or the end of the essence container
1847 * not pretty, but it works */
1848 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_pos, 0)) < 0 &&
1849 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1850 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1851 return AVERROR_INVALIDDATA;
1854 if ((size = next_pos - pos) <= 0) {
1855 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1856 return AVERROR_INVALIDDATA;
1859 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1862 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1863 return ret < 0 ? ret : AVERROR_EOF;
1865 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1866 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1867 pkt->dts = mxf->current_edit_unit + t->first_dts;
1868 pkt->pts = t->ptses[mxf->current_edit_unit];
1871 pkt->stream_index = 0;
1872 mxf->current_edit_unit++;
1877 static int mxf_read_close(AVFormatContext *s)
1879 MXFContext *mxf = s->priv_data;
1880 MXFIndexTableSegment *seg;
1883 av_freep(&mxf->packages_refs);
1885 for (i = 0; i < s->nb_streams; i++)
1886 s->streams[i]->priv_data = NULL;
1888 for (i = 0; i < mxf->metadata_sets_count; i++) {
1889 switch (mxf->metadata_sets[i]->type) {
1890 case MultipleDescriptor:
1891 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1894 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1897 case MaterialPackage:
1898 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1900 case IndexTableSegment:
1901 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1902 av_freep(&seg->temporal_offset_entries);
1903 av_freep(&seg->flag_entries);
1904 av_freep(&seg->stream_offset_entries);
1909 av_freep(&mxf->metadata_sets[i]);
1911 av_freep(&mxf->partitions);
1912 av_freep(&mxf->metadata_sets);
1913 av_freep(&mxf->aesc);
1914 av_freep(&mxf->local_tags);
1916 for (i = 0; i < mxf->nb_index_tables; i++) {
1917 av_freep(&mxf->index_tables[i].segments);
1918 av_freep(&mxf->index_tables[i].fake_index);
1920 av_freep(&mxf->index_tables);
1925 static int mxf_probe(AVProbeData *p) {
1926 uint8_t *bufp = p->buf;
1927 uint8_t *end = p->buf + p->buf_size;
1929 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1932 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1933 end -= sizeof(mxf_header_partition_pack_key);
1934 for (; bufp < end; bufp++) {
1935 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1936 return AVPROBE_SCORE_MAX;
1941 /* rudimentary byte seek */
1942 /* XXX: use MXF Index */
1943 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1945 AVStream *st = s->streams[stream_index];
1947 MXFContext* mxf = s->priv_data;
1952 if (mxf->index_tables <= 0) {
1955 if (sample_time < 0)
1957 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1958 if (avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET) < 0)
1960 ff_update_cur_dts(s, st, sample_time);
1962 t = &mxf->index_tables[0];
1964 /* clamp above zero, else ff_index_search_timestamp() returns negative
1965 * this also means we allow seeking before the start */
1966 sample_time = FFMAX(sample_time, 0);
1968 if (t->fake_index) {
1969 /* behave as if we have a proper index */
1970 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
1973 /* no IndexEntryArray (one or more CBR segments)
1974 * make sure we don't seek past the end */
1975 sample_time = FFMIN(sample_time, st->duration - 1);
1978 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
1981 av_update_cur_dts(s, st, sample_time);
1982 mxf->current_edit_unit = sample_time;
1983 avio_seek(s->pb, seekpos, SEEK_SET);
1988 AVInputFormat ff_mxf_demuxer = {
1990 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1991 .priv_data_size = sizeof(MXFContext),
1992 .read_probe = mxf_probe,
1993 .read_header = mxf_read_header,
1994 .read_packet = mxf_read_packet,
1995 .read_close = mxf_read_close,
1996 .read_seek = mxf_read_seek,