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
46 #include "libavutil/aes.h"
47 #include "libavutil/avassert.h"
48 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavutil/timecode.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;
121 struct AVRational rate;
123 } MXFTimecodeComponent;
127 enum MXFMetadataSetType type;
128 MXFSequence *sequence; /* mandatory, and only one */
131 uint8_t track_number[4];
132 AVRational edit_rate;
134 uint64_t sample_count;
135 int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate
140 enum MXFMetadataSetType type;
141 UID essence_container_ul;
142 UID essence_codec_ul;
143 AVRational sample_rate;
144 AVRational aspect_ratio;
146 int height; /* Field height, not frame height */
147 int frame_layout; /* See MXFFrameLayout enum */
151 unsigned int component_depth;
152 unsigned int horiz_subsampling;
153 unsigned int vert_subsampling;
154 UID *sub_descriptors_refs;
155 int sub_descriptors_count;
159 enum AVPixelFormat pix_fmt;
164 enum MXFMetadataSetType type;
165 int edit_unit_byte_count;
168 AVRational index_edit_rate;
169 uint64_t index_start_position;
170 uint64_t index_duration;
171 int8_t *temporal_offset_entries;
173 uint64_t *stream_offset_entries;
174 int nb_index_entries;
175 } MXFIndexTableSegment;
179 enum MXFMetadataSetType type;
183 MXFDescriptor *descriptor; /* only one */
189 enum MXFMetadataSetType type;
192 /* decoded index table */
196 int nb_ptses; /* number of PTSes or total duration of index */
197 int64_t first_dts; /* DTS = EditUnit + first_dts */
198 int64_t *ptses; /* maps EditUnit -> PTS */
200 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
201 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
205 MXFPartition *partitions;
206 unsigned partitions_count;
210 MXFMetadataSet **metadata_sets;
211 int metadata_sets_count;
215 int local_tags_count;
216 uint64_t footer_partition;
217 KLVPacket current_klv_data;
218 int current_klv_index;
220 MXFPartition *current_partition;
221 int parsing_backward;
222 int64_t last_forward_tell;
223 int last_forward_partition;
224 int current_edit_unit;
226 MXFIndexTable *index_tables;
227 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
230 enum MXFWrappingScheme {
235 /* NOTE: klv_offset is not set (-1) for local keys */
236 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
240 MXFMetadataReadFunc *read;
242 enum MXFMetadataSetType type;
243 } MXFMetadataReadTableEntry;
245 static int mxf_read_close(AVFormatContext *s);
247 /* partial keys to match */
248 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
249 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
250 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
251 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
252 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
253 /* complete keys to match */
254 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 };
255 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
256 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
257 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
259 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
261 static int64_t klv_decode_ber_length(AVIOContext *pb)
263 uint64_t size = avio_r8(pb);
264 if (size & 0x80) { /* long form */
265 int bytes_num = size & 0x7f;
266 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
268 return AVERROR_INVALIDDATA;
271 size = size << 8 | avio_r8(pb);
276 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
279 for (i = 0; i < size && !url_feof(pb); i++) {
283 else if (b != key[i])
289 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
291 if (!mxf_read_sync(pb, mxf_klv_key, 4))
292 return AVERROR_INVALIDDATA;
293 klv->offset = avio_tell(pb) - 4;
294 memcpy(klv->key, mxf_klv_key, 4);
295 avio_read(pb, klv->key + 4, 12);
296 klv->length = klv_decode_ber_length(pb);
297 return klv->length == -1 ? -1 : 0;
300 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
304 for (i = 0; i < s->nb_streams; i++) {
305 MXFTrack *track = s->streams[i]->priv_data;
307 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
310 /* return 0 if only one stream, for OP Atom files with 0 as track number */
311 return s->nb_streams == 1 ? 0 : -1;
314 /* XXX: use AVBitStreamFilter */
315 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
317 const uint8_t *buf_ptr, *end_ptr;
321 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
322 return AVERROR_INVALIDDATA;
323 length = av_get_packet(pb, pkt, length);
326 data_ptr = pkt->data;
327 end_ptr = pkt->data + length;
328 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
329 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
330 for (i = 0; i < st->codec->channels; i++) {
331 uint32_t sample = bytestream_get_le32(&buf_ptr);
332 if (st->codec->bits_per_coded_sample == 24)
333 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
335 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
337 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
339 av_shrink_packet(pkt, data_ptr - pkt->data);
343 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
345 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
346 MXFContext *mxf = s->priv_data;
347 AVIOContext *pb = s->pb;
348 int64_t end = avio_tell(pb) + klv->length;
351 uint64_t plaintext_size;
356 if (!mxf->aesc && s->key && s->keylen == 16) {
357 mxf->aesc = av_aes_alloc();
359 return AVERROR(ENOMEM);
360 av_aes_init(mxf->aesc, s->key, 128, 1);
363 avio_skip(pb, klv_decode_ber_length(pb));
365 klv_decode_ber_length(pb);
366 plaintext_size = avio_rb64(pb);
368 klv_decode_ber_length(pb);
369 avio_read(pb, klv->key, 16);
370 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
371 return AVERROR_INVALIDDATA;
372 index = mxf_get_stream_index(s, klv);
374 return AVERROR_INVALIDDATA;
376 klv_decode_ber_length(pb);
377 orig_size = avio_rb64(pb);
378 if (orig_size < plaintext_size)
379 return AVERROR_INVALIDDATA;
381 size = klv_decode_ber_length(pb);
382 if (size < 32 || size - 32 < orig_size)
383 return AVERROR_INVALIDDATA;
384 avio_read(pb, ivec, 16);
385 avio_read(pb, tmpbuf, 16);
387 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
388 if (memcmp(tmpbuf, checkv, 16))
389 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
391 size = av_get_packet(pb, pkt, size);
394 else if (size < plaintext_size)
395 return AVERROR_INVALIDDATA;
396 size -= plaintext_size;
398 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
399 &pkt->data[plaintext_size], size >> 4, ivec, 1);
400 av_shrink_packet(pkt, orig_size);
401 pkt->stream_index = index;
402 avio_skip(pb, end - avio_tell(pb));
406 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
408 MXFContext *mxf = arg;
409 int item_num = avio_rb32(pb);
410 int item_len = avio_rb32(pb);
412 if (item_len != 18) {
413 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
414 return AVERROR_PATCHWELCOME;
416 if (item_num > 65536) {
417 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
418 return AVERROR_INVALIDDATA;
420 mxf->local_tags = av_calloc(item_num, item_len);
421 if (!mxf->local_tags)
422 return AVERROR(ENOMEM);
423 mxf->local_tags_count = item_num;
424 avio_read(pb, mxf->local_tags, item_num*item_len);
428 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
430 MXFContext *mxf = arg;
431 MXFPartition *partition, *tmp_part;
433 uint64_t footer_partition;
434 uint32_t nb_essence_containers;
436 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
438 return AVERROR(ENOMEM);
439 mxf->partitions = tmp_part;
441 if (mxf->parsing_backward) {
442 /* insert the new partition pack in the middle
443 * this makes the entries in mxf->partitions sorted by offset */
444 memmove(&mxf->partitions[mxf->last_forward_partition+1],
445 &mxf->partitions[mxf->last_forward_partition],
446 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
447 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
449 mxf->last_forward_partition++;
450 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
453 memset(partition, 0, sizeof(*partition));
454 mxf->partitions_count++;
455 partition->pack_length = avio_tell(pb) - klv_offset + size;
459 partition->type = Header;
462 partition->type = BodyPartition;
465 partition->type = Footer;
468 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
469 return AVERROR_INVALIDDATA;
472 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
473 partition->closed = partition->type == Footer || !(uid[14] & 1);
474 partition->complete = uid[14] > 2;
476 partition->kag_size = avio_rb32(pb);
477 partition->this_partition = avio_rb64(pb);
478 partition->previous_partition = avio_rb64(pb);
479 footer_partition = avio_rb64(pb);
480 partition->header_byte_count = avio_rb64(pb);
481 partition->index_byte_count = avio_rb64(pb);
482 partition->index_sid = avio_rb32(pb);
484 partition->body_sid = avio_rb32(pb);
485 avio_read(pb, op, sizeof(UID));
486 nb_essence_containers = avio_rb32(pb);
488 /* some files don'thave FooterPartition set in every partition */
489 if (footer_partition) {
490 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
491 av_log(mxf->fc, AV_LOG_ERROR,
492 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
493 mxf->footer_partition, footer_partition);
495 mxf->footer_partition = footer_partition;
500 "PartitionPack: ThisPartition = 0x%"PRIX64
501 ", PreviousPartition = 0x%"PRIX64", "
502 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
503 partition->this_partition,
504 partition->previous_partition, footer_partition,
505 partition->index_sid, partition->body_sid);
507 /* sanity check PreviousPartition if set */
508 if (partition->previous_partition &&
509 mxf->run_in + partition->previous_partition >= klv_offset) {
510 av_log(mxf->fc, AV_LOG_ERROR,
511 "PreviousPartition points to this partition or forward\n");
512 return AVERROR_INVALIDDATA;
515 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
516 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
517 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
518 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
519 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
520 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
521 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
522 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
523 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
524 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
525 else if (op[12] == 0x10) {
526 /* SMPTE 390m: "There shall be exactly one essence container"
527 * The following block deals with files that violate this, namely:
528 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
529 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
530 if (nb_essence_containers != 1) {
531 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
535 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
536 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
542 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
546 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
547 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
549 if (mxf->op == OPSONYOpt)
550 partition->kag_size = 512;
552 partition->kag_size = 1;
554 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
560 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
562 MXFMetadataSet **tmp;
564 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
566 return AVERROR(ENOMEM);
567 mxf->metadata_sets = tmp;
568 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
569 mxf->metadata_sets_count++;
573 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
575 MXFCryptoContext *cryptocontext = arg;
577 return AVERROR_INVALIDDATA;
578 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
579 avio_read(pb, cryptocontext->source_container_ul, 16);
583 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
585 MXFContext *mxf = arg;
588 mxf->packages_count = avio_rb32(pb);
589 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
590 if (!mxf->packages_refs)
591 return AVERROR(ENOMEM);
592 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
593 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
599 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
601 MXFStructuralComponent *source_clip = arg;
604 source_clip->duration = avio_rb64(pb);
607 source_clip->start_position = avio_rb64(pb);
610 /* UMID, only get last 16 bytes */
612 avio_read(pb, source_clip->source_package_uid, 16);
615 source_clip->source_track_id = avio_rb32(pb);
621 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
623 MXFPackage *package = arg;
626 package->tracks_count = avio_rb32(pb);
627 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
628 if (!package->tracks_refs)
629 return AVERROR(ENOMEM);
630 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
631 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
637 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
639 MXFTimecodeComponent *mxf_timecode = arg;
642 mxf_timecode->start_frame = avio_rb64(pb);
645 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
648 mxf_timecode->drop_frame = avio_r8(pb);
654 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
656 MXFTrack *track = arg;
659 track->track_id = avio_rb32(pb);
662 avio_read(pb, track->track_number, 4);
665 track->edit_rate.num = avio_rb32(pb);
666 track->edit_rate.den = avio_rb32(pb);
669 avio_read(pb, track->sequence_ref, 16);
675 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
677 MXFSequence *sequence = arg;
680 sequence->duration = avio_rb64(pb);
683 avio_read(pb, sequence->data_definition_ul, 16);
686 sequence->structural_components_count = avio_rb32(pb);
687 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
688 if (!sequence->structural_components_refs)
689 return AVERROR(ENOMEM);
690 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
691 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
697 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
699 MXFPackage *package = arg;
702 package->tracks_count = avio_rb32(pb);
703 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
704 if (!package->tracks_refs)
705 return AVERROR(ENOMEM);
706 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
707 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
710 /* UMID, only get last 16 bytes */
712 avio_read(pb, package->package_uid, 16);
715 avio_read(pb, package->descriptor_ref, 16);
721 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
725 segment->nb_index_entries = avio_rb32(pb);
727 length = avio_rb32(pb);
729 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
730 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
731 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
732 return AVERROR(ENOMEM);
734 for (i = 0; i < segment->nb_index_entries; i++) {
735 segment->temporal_offset_entries[i] = avio_r8(pb);
736 avio_r8(pb); /* KeyFrameOffset */
737 segment->flag_entries[i] = avio_r8(pb);
738 segment->stream_offset_entries[i] = avio_rb64(pb);
739 avio_skip(pb, length - 11);
744 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
746 MXFIndexTableSegment *segment = arg;
749 segment->edit_unit_byte_count = avio_rb32(pb);
750 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
753 segment->index_sid = avio_rb32(pb);
754 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
757 segment->body_sid = avio_rb32(pb);
758 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
761 av_dlog(NULL, "IndexEntryArray found\n");
762 return mxf_read_index_entry_array(pb, segment);
764 segment->index_edit_rate.num = avio_rb32(pb);
765 segment->index_edit_rate.den = avio_rb32(pb);
766 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
767 segment->index_edit_rate.den);
770 segment->index_start_position = avio_rb64(pb);
771 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
774 segment->index_duration = avio_rb64(pb);
775 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
781 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
783 int code, value, ofs = 0;
784 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
789 av_dlog(NULL, "pixel layout: code %#x\n", code);
792 layout[ofs++] = code;
793 layout[ofs++] = value;
795 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
796 } while (code != 0); /* SMPTE 377M E.2.46 */
798 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
801 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
803 MXFDescriptor *descriptor = arg;
804 descriptor->pix_fmt = AV_PIX_FMT_NONE;
807 descriptor->sub_descriptors_count = avio_rb32(pb);
808 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
809 if (!descriptor->sub_descriptors_refs)
810 return AVERROR(ENOMEM);
811 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
812 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
815 avio_read(pb, descriptor->essence_container_ul, 16);
818 descriptor->linked_track_id = avio_rb32(pb);
820 case 0x3201: /* PictureEssenceCoding */
821 avio_read(pb, descriptor->essence_codec_ul, 16);
824 descriptor->width = avio_rb32(pb);
827 descriptor->height = avio_rb32(pb);
830 descriptor->frame_layout = avio_r8(pb);
833 descriptor->aspect_ratio.num = avio_rb32(pb);
834 descriptor->aspect_ratio.den = avio_rb32(pb);
837 descriptor->field_dominance = avio_r8(pb);
840 descriptor->component_depth = avio_rb32(pb);
843 descriptor->horiz_subsampling = avio_rb32(pb);
846 descriptor->vert_subsampling = avio_rb32(pb);
849 descriptor->sample_rate.num = avio_rb32(pb);
850 descriptor->sample_rate.den = avio_rb32(pb);
852 case 0x3D06: /* SoundEssenceCompression */
853 avio_read(pb, descriptor->essence_codec_ul, 16);
856 descriptor->channels = avio_rb32(pb);
859 descriptor->bits_per_sample = avio_rb32(pb);
862 mxf_read_pixel_layout(pb, descriptor);
865 /* Private uid used by SONY C0023S01.mxf */
866 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
867 if (descriptor->extradata)
868 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
869 av_free(descriptor->extradata);
870 descriptor->extradata_size = 0;
871 descriptor->extradata = av_malloc(size);
872 if (!descriptor->extradata)
873 return AVERROR(ENOMEM);
874 descriptor->extradata_size = size;
875 avio_read(pb, descriptor->extradata, size);
883 * Match an uid independently of the version byte and up to len common bytes
886 static int mxf_match_uid(const UID key, const UID uid, int len)
889 for (i = 0; i < len; i++) {
890 if (i != 7 && key[i] != uid[i])
896 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
898 while (uls->uid[0]) {
899 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
906 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
912 for (i = 0; i < mxf->metadata_sets_count; i++) {
913 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
914 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
915 return mxf->metadata_sets[i];
921 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
922 // video essence container uls
923 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
924 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
925 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
926 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
929 /* EC ULs for intra-only formats */
930 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
931 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
932 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
935 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
936 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
937 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
938 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
939 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
942 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
943 // sound essence container uls
944 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
945 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
946 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
947 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
948 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
951 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
953 int i, j, nb_segments = 0;
954 MXFIndexTableSegment **unsorted_segments;
955 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
957 /* count number of segments, allocate arrays and copy unsorted segments */
958 for (i = 0; i < mxf->metadata_sets_count; i++)
959 if (mxf->metadata_sets[i]->type == IndexTableSegment)
963 return AVERROR_INVALIDDATA;
965 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
966 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
967 av_freep(sorted_segments);
968 av_free(unsorted_segments);
969 return AVERROR(ENOMEM);
972 for (i = j = 0; i < mxf->metadata_sets_count; i++)
973 if (mxf->metadata_sets[i]->type == IndexTableSegment)
974 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
976 *nb_sorted_segments = 0;
978 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
979 for (i = 0; i < nb_segments; i++) {
980 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
981 uint64_t best_index_duration = 0;
983 for (j = 0; j < nb_segments; j++) {
984 MXFIndexTableSegment *s = unsorted_segments[j];
986 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
987 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
988 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
990 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
991 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
992 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
994 best_body_sid = s->body_sid;
995 best_index_sid = s->index_sid;
996 best_index_start = s->index_start_position;
997 best_index_duration = s->index_duration;
1001 /* no suitable entry found -> we're done */
1005 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1006 last_body_sid = best_body_sid;
1007 last_index_sid = best_index_sid;
1008 last_index_start = best_index_start;
1011 av_free(unsorted_segments);
1017 * Computes the absolute file offset of the given essence container offset
1019 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1022 int64_t offset_in = offset; /* for logging */
1024 for (x = 0; x < mxf->partitions_count; x++) {
1025 MXFPartition *p = &mxf->partitions[x];
1027 if (p->body_sid != body_sid)
1030 if (offset < p->essence_length || !p->essence_length) {
1031 *offset_out = p->essence_offset + offset;
1035 offset -= p->essence_length;
1038 av_log(mxf->fc, AV_LOG_ERROR,
1039 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1040 offset_in, body_sid);
1042 return AVERROR_INVALIDDATA;
1046 * Returns the end position of the essence container with given BodySID, or zero if unknown
1048 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1053 for (x = 0; x < mxf->partitions_count; x++) {
1054 MXFPartition *p = &mxf->partitions[x];
1056 if (p->body_sid != body_sid)
1059 if (!p->essence_length)
1062 ret = p->essence_offset + p->essence_length;
1068 /* EditUnit -> absolute offset */
1069 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)
1072 int64_t offset_temp = 0;
1074 for (i = 0; i < index_table->nb_segments; i++) {
1075 MXFIndexTableSegment *s = index_table->segments[i];
1077 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1079 if (edit_unit < s->index_start_position + s->index_duration) {
1080 int64_t index = edit_unit - s->index_start_position;
1082 if (s->edit_unit_byte_count)
1083 offset_temp += s->edit_unit_byte_count * index;
1084 else if (s->nb_index_entries) {
1085 if (s->nb_index_entries == 2 * s->index_duration + 1)
1086 index *= 2; /* Avid index */
1088 if (index < 0 || index >= s->nb_index_entries) {
1089 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1090 index_table->index_sid, s->index_start_position);
1091 return AVERROR_INVALIDDATA;
1094 offset_temp = s->stream_offset_entries[index];
1096 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1097 index_table->index_sid, s->index_start_position);
1098 return AVERROR_INVALIDDATA;
1102 *edit_unit_out = edit_unit;
1104 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1106 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1107 offset_temp += s->edit_unit_byte_count * s->index_duration;
1112 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);
1114 return AVERROR_INVALIDDATA;
1117 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1120 int8_t max_temporal_offset = -128;
1122 /* first compute how many entries we have */
1123 for (i = 0; i < index_table->nb_segments; i++) {
1124 MXFIndexTableSegment *s = index_table->segments[i];
1126 if (!s->nb_index_entries) {
1127 index_table->nb_ptses = 0;
1128 return 0; /* no TemporalOffsets */
1131 index_table->nb_ptses += s->index_duration;
1134 /* paranoid check */
1135 if (index_table->nb_ptses <= 0)
1138 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1139 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1140 av_freep(&index_table->ptses);
1141 return AVERROR(ENOMEM);
1144 /* we may have a few bad TemporalOffsets
1145 * make sure the corresponding PTSes don't have the bogus value 0 */
1146 for (x = 0; x < index_table->nb_ptses; x++)
1147 index_table->ptses[x] = AV_NOPTS_VALUE;
1161 * We want to transform it into this:
1172 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1173 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1174 * The latter makes DTS <= PTS.
1176 for (i = x = 0; i < index_table->nb_segments; i++) {
1177 MXFIndexTableSegment *s = index_table->segments[i];
1178 int index_delta = 1;
1179 int n = s->nb_index_entries;
1181 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1182 index_delta = 2; /* Avid index */
1183 /* ignore the last entry - it's the size of the essence container */
1187 for (j = 0; j < n; j += index_delta, x++) {
1188 int offset = s->temporal_offset_entries[j] / index_delta;
1189 int index = x + offset;
1191 if (x >= index_table->nb_ptses) {
1192 av_log(mxf->fc, AV_LOG_ERROR,
1193 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1194 s->nb_index_entries, s->index_duration);
1198 index_table->fake_index[x].timestamp = x;
1199 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1201 if (index < 0 || index >= index_table->nb_ptses) {
1202 av_log(mxf->fc, AV_LOG_ERROR,
1203 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1208 index_table->ptses[index] = x;
1209 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1213 index_table->first_dts = -max_temporal_offset;
1219 * Sorts and collects index table segments into index tables.
1220 * Also computes PTSes if possible.
1222 static int mxf_compute_index_tables(MXFContext *mxf)
1224 int i, j, k, ret, nb_sorted_segments;
1225 MXFIndexTableSegment **sorted_segments = NULL;
1227 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1228 nb_sorted_segments <= 0) {
1229 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1233 /* sanity check and count unique BodySIDs/IndexSIDs */
1234 for (i = 0; i < nb_sorted_segments; i++) {
1235 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1236 mxf->nb_index_tables++;
1237 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1238 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1239 ret = AVERROR_INVALIDDATA;
1240 goto finish_decoding_index;
1244 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1245 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1246 ret = AVERROR(ENOMEM);
1247 goto finish_decoding_index;
1250 /* distribute sorted segments to index tables */
1251 for (i = j = 0; i < nb_sorted_segments; i++) {
1252 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1257 mxf->index_tables[j].nb_segments++;
1260 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1261 MXFIndexTable *t = &mxf->index_tables[j];
1263 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1264 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1265 ret = AVERROR(ENOMEM);
1266 goto finish_decoding_index;
1269 if (sorted_segments[i]->index_start_position)
1270 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1271 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1273 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1274 t->index_sid = sorted_segments[i]->index_sid;
1275 t->body_sid = sorted_segments[i]->body_sid;
1277 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1278 goto finish_decoding_index;
1280 /* fix zero IndexDurations */
1281 for (k = 0; k < t->nb_segments; k++) {
1282 if (t->segments[k]->index_duration)
1285 if (t->nb_segments > 1)
1286 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1289 if (mxf->fc->nb_streams <= 0) {
1290 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1294 /* assume the first stream's duration is reasonable
1295 * leave index_duration = 0 on further segments in case we have any (unlikely)
1297 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1303 finish_decoding_index:
1304 av_free(sorted_segments);
1308 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1310 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1311 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1312 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1313 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1316 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1318 char buf[AV_TIMECODE_STR_SIZE];
1319 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1324 static int mxf_parse_structural_metadata(MXFContext *mxf)
1326 MXFPackage *material_package = NULL;
1327 MXFPackage *temp_package = NULL;
1330 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1331 /* TODO: handle multiple material packages (OP3x) */
1332 for (i = 0; i < mxf->packages_count; i++) {
1333 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1334 if (material_package) break;
1336 if (!material_package) {
1337 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1338 return AVERROR_INVALIDDATA;
1341 for (i = 0; i < material_package->tracks_count; i++) {
1342 MXFPackage *source_package = NULL;
1343 MXFTrack *material_track = NULL;
1344 MXFTrack *source_track = NULL;
1345 MXFTrack *temp_track = NULL;
1346 MXFDescriptor *descriptor = NULL;
1347 MXFStructuralComponent *component = NULL;
1348 MXFTimecodeComponent *mxf_tc = NULL;
1349 UID *essence_container_ul = NULL;
1350 const MXFCodecUL *codec_ul = NULL;
1351 const MXFCodecUL *container_ul = NULL;
1352 const MXFCodecUL *pix_fmt_ul = NULL;
1357 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1358 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1362 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1363 mxf_tc = (MXFTimecodeComponent*)component;
1364 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1365 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1366 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1370 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1371 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1375 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1376 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1380 mxf_tc = (MXFTimecodeComponent*)component;
1381 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1382 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1383 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1388 /* TODO: handle multiple source clips */
1389 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1390 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1394 for (k = 0; k < mxf->packages_count; k++) {
1395 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1398 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1399 source_package = temp_package;
1403 if (!source_package) {
1404 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1407 for (k = 0; k < source_package->tracks_count; k++) {
1408 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1409 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1410 ret = AVERROR_INVALIDDATA;
1413 if (temp_track->track_id == component->source_track_id) {
1414 source_track = temp_track;
1418 if (!source_track) {
1419 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1423 if (!source_track || !component)
1426 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1427 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1428 ret = AVERROR_INVALIDDATA;
1432 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1433 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1434 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1435 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1439 st = avformat_new_stream(mxf->fc, NULL);
1441 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1442 ret = AVERROR(ENOMEM);
1445 st->id = source_track->track_id;
1446 st->priv_data = source_track;
1447 source_track->original_duration = st->duration = component->duration;
1448 if (st->duration == -1)
1449 st->duration = AV_NOPTS_VALUE;
1450 st->start_time = component->start_position;
1451 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1452 av_log(mxf->fc, AV_LOG_WARNING,
1453 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1454 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1455 material_track->edit_rate = (AVRational){25, 1};
1457 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1459 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1460 source_track->edit_rate = material_track->edit_rate;
1462 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1463 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1464 st->codec->codec_type = codec_ul->id;
1466 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1467 if (source_package->descriptor) {
1468 if (source_package->descriptor->type == MultipleDescriptor) {
1469 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1470 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1472 if (!sub_descriptor) {
1473 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1476 if (sub_descriptor->linked_track_id == source_track->track_id) {
1477 descriptor = sub_descriptor;
1481 } else if (source_package->descriptor->type == Descriptor)
1482 descriptor = source_package->descriptor;
1485 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1488 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1489 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1490 essence_container_ul = &descriptor->essence_container_ul;
1491 /* HACK: replacing the original key with mxf_encrypted_essence_container
1492 * is not allowed according to s429-6, try to find correct information anyway */
1493 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1494 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1495 for (k = 0; k < mxf->metadata_sets_count; k++) {
1496 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1497 if (metadata->type == CryptoContext) {
1498 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1504 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1505 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1506 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1507 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1508 avcodec_get_name(st->codec->codec_id));
1509 for (k = 0; k < 16; k++) {
1510 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1511 descriptor->essence_codec_ul[k]);
1512 if (!(k+1 & 19) || k == 5)
1513 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1515 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1516 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1517 source_track->intra_only = mxf_is_intra_only(descriptor);
1518 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1519 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1520 st->codec->codec_id = container_ul->id;
1521 st->codec->width = descriptor->width;
1522 st->codec->height = descriptor->height; /* Field height, not frame height */
1523 switch (descriptor->frame_layout) {
1524 case SegmentedFrame:
1525 /* This one is a weird layout I don't fully understand. */
1526 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1529 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1532 /* Every other line is stored and needs to be duplicated. */
1533 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1534 break; /* The correct thing to do here is fall through, but by breaking we might be
1535 able to decode some streams at half the vertical resolution, rather than not al all.
1536 It's also for compatibility with the old behavior. */
1539 case SeparateFields:
1540 st->codec->height *= 2; /* Turn field height into frame height. */
1543 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1545 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1546 st->codec->pix_fmt = descriptor->pix_fmt;
1547 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1548 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1549 &descriptor->essence_codec_ul);
1550 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1551 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1552 /* support files created before RP224v10 by defaulting to UYVY422
1553 if subsampling is 4:2:2 and component depth is 8-bit */
1554 if (descriptor->horiz_subsampling == 2 &&
1555 descriptor->vert_subsampling == 1 &&
1556 descriptor->component_depth == 8) {
1557 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1562 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1563 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1564 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1565 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1566 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
1567 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1568 st->codec->channels = descriptor->channels;
1569 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1571 if (descriptor->sample_rate.den > 0) {
1572 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1573 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1575 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1576 "found for stream #%d, time base forced to 1/48000\n",
1577 descriptor->sample_rate.num, descriptor->sample_rate.den,
1579 avpriv_set_pts_info(st, 64, 1, 48000);
1582 /* if duration is set, rescale it from EditRate to SampleRate */
1583 if (st->duration != AV_NOPTS_VALUE)
1584 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1586 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1587 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1588 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1589 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1590 else if (descriptor->bits_per_sample == 32)
1591 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1592 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1593 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1594 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1595 else if (descriptor->bits_per_sample == 32)
1596 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1597 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1598 st->need_parsing = AVSTREAM_PARSE_FULL;
1601 if (descriptor->extradata) {
1602 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1603 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1605 } else if(st->codec->codec_id == AV_CODEC_ID_H264) {
1606 ff_generate_avci_extradata(st);
1608 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1609 /* TODO: decode timestamps */
1610 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1619 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1625 return AVERROR(EINVAL);
1627 buf_size = size + size/2 + 1;
1628 *str = av_malloc(buf_size);
1630 return AVERROR(ENOMEM);
1632 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1640 static int mxf_uid_to_str(UID uid, char **str)
1644 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1646 return AVERROR(ENOMEM);
1647 for (i = 0; i < sizeof(UID); i++) {
1648 snprintf(p, 2 + 1, "%.2x", uid[i]);
1650 if (i == 3 || i == 5 || i == 7 || i == 9) {
1651 snprintf(p, 1 + 1, "-");
1658 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1660 struct tm time = {0};
1661 time.tm_year = (timestamp >> 48) - 1900;
1662 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1663 time.tm_mday = (timestamp >> 32 & 0xFF);
1664 time.tm_hour = (timestamp >> 24 & 0xFF);
1665 time.tm_min = (timestamp >> 16 & 0xFF);
1666 time.tm_sec = (timestamp >> 8 & 0xFF);
1668 /* ensure month/day are valid */
1669 time.tm_mon = FFMAX(time.tm_mon, 0);
1670 time.tm_mday = FFMAX(time.tm_mday, 1);
1672 *str = av_mallocz(32);
1674 return AVERROR(ENOMEM);
1675 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1680 #define SET_STR_METADATA(pb, name, str) do { \
1681 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1683 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1686 #define SET_UID_METADATA(pb, name, var, str) do { \
1687 avio_read(pb, var, 16); \
1688 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1690 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1693 #define SET_TS_METADATA(pb, name, var, str) do { \
1694 var = avio_rb64(pb); \
1695 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1697 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1700 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1702 MXFContext *mxf = arg;
1703 AVFormatContext *s = mxf->fc;
1710 SET_STR_METADATA(pb, "company_name", str);
1713 SET_STR_METADATA(pb, "product_name", str);
1716 SET_STR_METADATA(pb, "product_version", str);
1719 SET_UID_METADATA(pb, "product_uid", uid, str);
1722 SET_TS_METADATA(pb, "modification_date", ts, str);
1725 SET_STR_METADATA(pb, "application_platform", str);
1728 SET_UID_METADATA(pb, "generation_uid", uid, str);
1731 SET_UID_METADATA(pb, "uid", uid, str);
1737 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1738 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1739 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1740 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1756 { { 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 */
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1759 { { 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 */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1762 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1766 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1767 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1770 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1772 AVIOContext *pb = mxf->fc->pb;
1773 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1774 uint64_t klv_end = avio_tell(pb) + klv->length;
1777 return AVERROR(ENOMEM);
1778 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1780 int tag = avio_rb16(pb);
1781 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1782 uint64_t next = avio_tell(pb) + size;
1785 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1786 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1787 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1790 if (tag > 0x7FFF) { /* dynamic tag */
1792 for (i = 0; i < mxf->local_tags_count; i++) {
1793 int local_tag = AV_RB16(mxf->local_tags+i*18);
1794 if (local_tag == tag) {
1795 memcpy(uid, mxf->local_tags+i*18+2, 16);
1796 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1797 PRINT_KEY(mxf->fc, "uid", uid);
1801 if (ctx_size && tag == 0x3C0A)
1802 avio_read(pb, ctx->uid, 16);
1803 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1806 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1807 * it extending past the end of the KLV though (zzuf5.mxf). */
1808 if (avio_tell(pb) > klv_end) {
1812 av_log(mxf->fc, AV_LOG_ERROR,
1813 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1815 return AVERROR_INVALIDDATA;
1816 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1817 avio_seek(pb, next, SEEK_SET);
1819 if (ctx_size) ctx->type = type;
1820 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1824 * Seeks to the previous partition, if possible
1825 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1827 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1829 AVIOContext *pb = mxf->fc->pb;
1831 if (!mxf->current_partition ||
1832 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1833 return 0; /* we've parsed all partitions */
1835 /* seek to previous partition */
1836 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1837 mxf->current_partition = NULL;
1839 av_dlog(mxf->fc, "seeking to previous partition\n");
1845 * Called when essence is encountered
1846 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1848 static int mxf_parse_handle_essence(MXFContext *mxf)
1850 AVIOContext *pb = mxf->fc->pb;
1853 if (mxf->parsing_backward) {
1854 return mxf_seek_to_previous_partition(mxf);
1856 if (!mxf->footer_partition) {
1857 av_dlog(mxf->fc, "no footer\n");
1861 av_dlog(mxf->fc, "seeking to footer\n");
1863 /* remember where we were so we don't end up seeking further back than this */
1864 mxf->last_forward_tell = avio_tell(pb);
1866 if (!pb->seekable) {
1867 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1871 /* seek to footer partition and parse backward */
1872 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1873 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1874 mxf->run_in + mxf->footer_partition, ret);
1878 mxf->current_partition = NULL;
1879 mxf->parsing_backward = 1;
1886 * Called when the next partition or EOF is encountered
1887 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1889 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1891 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1895 * Figures out the proper offset and length of the essence container in each partition
1897 static void mxf_compute_essence_containers(MXFContext *mxf)
1901 /* everything is already correct */
1902 if (mxf->op == OPAtom)
1905 for (x = 0; x < mxf->partitions_count; x++) {
1906 MXFPartition *p = &mxf->partitions[x];
1909 continue; /* BodySID == 0 -> no essence */
1911 if (x >= mxf->partitions_count - 1)
1912 break; /* last partition - can't compute length (and we don't need to) */
1914 /* essence container spans to the next partition */
1915 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1917 if (p->essence_length < 0) {
1918 /* next ThisPartition < essence_offset */
1919 p->essence_length = 0;
1920 av_log(mxf->fc, AV_LOG_ERROR,
1921 "partition %i: bad ThisPartition = %"PRIX64"\n",
1922 x+1, mxf->partitions[x+1].this_partition);
1927 static int64_t round_to_kag(int64_t position, int kag_size)
1929 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1930 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1931 int64_t ret = (position / kag_size) * kag_size;
1932 return ret == position ? ret : ret + kag_size;
1935 static int is_pcm(enum AVCodecID codec_id)
1937 /* we only care about "normal" PCM codecs until we get samples */
1938 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1942 * Deal with the case where for some audio atoms EditUnitByteCount is
1943 * very small (2, 4..). In those cases we should read more than one
1944 * sample per call to mxf_read_packet().
1946 static void mxf_handle_small_eubc(AVFormatContext *s)
1948 MXFContext *mxf = s->priv_data;
1950 /* assuming non-OPAtom == frame wrapped
1951 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1952 if (mxf->op != OPAtom)
1955 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1956 if (s->nb_streams != 1 ||
1957 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1958 !is_pcm(s->streams[0]->codec->codec_id) ||
1959 mxf->nb_index_tables != 1 ||
1960 mxf->index_tables[0].nb_segments != 1 ||
1961 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1964 /* arbitrarily default to 48 kHz PAL audio frame size */
1965 /* TODO: We could compute this from the ratio between the audio
1966 * and video edit rates for 48 kHz NTSC we could use the
1967 * 1802-1802-1802-1802-1801 pattern. */
1968 mxf->edit_units_per_packet = 1920;
1971 static int mxf_read_header(AVFormatContext *s)
1973 MXFContext *mxf = s->priv_data;
1975 int64_t essence_offset = 0;
1978 mxf->last_forward_tell = INT64_MAX;
1979 mxf->edit_units_per_packet = 1;
1981 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1982 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1983 return AVERROR_INVALIDDATA;
1985 avio_seek(s->pb, -14, SEEK_CUR);
1987 mxf->run_in = avio_tell(s->pb);
1989 while (!url_feof(s->pb)) {
1990 const MXFMetadataReadTableEntry *metadata;
1992 if (klv_read_packet(&klv, s->pb) < 0) {
1993 /* EOF - seek to previous partition or stop */
1994 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2000 PRINT_KEY(s, "read header", klv.key);
2001 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2002 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2003 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2004 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2005 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2007 if (!mxf->current_partition) {
2008 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2009 return AVERROR_INVALIDDATA;
2012 if (!mxf->current_partition->essence_offset) {
2013 /* for OP1a we compute essence_offset
2014 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2015 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2016 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2018 int64_t op1a_essence_offset =
2019 round_to_kag(mxf->current_partition->this_partition +
2020 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2021 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2022 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2024 if (mxf->op == OPAtom) {
2025 /* point essence_offset to the actual data
2026 * OPAtom has all the essence in one big KLV
2028 mxf->current_partition->essence_offset = avio_tell(s->pb);
2029 mxf->current_partition->essence_length = klv.length;
2031 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2032 mxf->current_partition->essence_offset = op1a_essence_offset;
2036 if (!essence_offset)
2037 essence_offset = klv.offset;
2039 /* seek to footer, previous partition or stop */
2040 if (mxf_parse_handle_essence(mxf) <= 0)
2043 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2044 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2045 /* next partition pack - keep going, seek to previous partition or stop */
2046 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2048 else if (mxf->parsing_backward)
2050 /* we're still parsing forward. proceed to parsing this partition pack */
2053 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2054 if (IS_KLV_KEY(klv.key, metadata->key)) {
2056 if (klv.key[5] == 0x53) {
2057 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2059 uint64_t next = avio_tell(s->pb) + klv.length;
2060 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2062 /* only seek forward, else this can loop for a long time */
2063 if (avio_tell(s->pb) > next) {
2064 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2066 return AVERROR_INVALIDDATA;
2069 avio_seek(s->pb, next, SEEK_SET);
2072 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2078 if (!metadata->read)
2079 avio_skip(s->pb, klv.length);
2081 /* FIXME avoid seek */
2082 if (!essence_offset) {
2083 av_log(s, AV_LOG_ERROR, "no essence\n");
2084 return AVERROR_INVALIDDATA;
2086 avio_seek(s->pb, essence_offset, SEEK_SET);
2088 mxf_compute_essence_containers(mxf);
2090 /* we need to do this before computing the index tables
2091 * to be able to fill in zero IndexDurations with st->duration */
2092 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2095 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2098 if (mxf->nb_index_tables > 1) {
2099 /* TODO: look up which IndexSID to use via EssenceContainerData */
2100 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2101 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2102 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2103 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2104 ret = AVERROR_INVALIDDATA;
2108 mxf_handle_small_eubc(s);
2118 * Sets mxf->current_edit_unit based on what offset we're currently at.
2119 * @return next_ofs if OK, <0 on error
2121 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2123 int64_t last_ofs = -1, next_ofs = -1;
2124 MXFIndexTable *t = &mxf->index_tables[0];
2126 /* this is called from the OP1a demuxing logic, which means there
2127 * may be no index tables */
2128 if (mxf->nb_index_tables <= 0)
2131 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2132 while (mxf->current_edit_unit >= 0) {
2133 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2136 if (next_ofs <= last_ofs) {
2137 /* large next_ofs didn't change or current_edit_unit wrapped
2138 * around this fixes the infinite loop on zzuf3.mxf */
2139 av_log(mxf->fc, AV_LOG_ERROR,
2140 "next_ofs didn't change. not deriving packet timestamps\n");
2144 if (next_ofs > current_offset)
2147 last_ofs = next_ofs;
2148 mxf->current_edit_unit++;
2151 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2152 if (mxf->current_edit_unit < 0)
2158 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2160 int i, total = 0, size = 0;
2161 AVStream *st = mxf->fc->streams[stream_index];
2162 MXFTrack *track = st->priv_data;
2163 AVRational time_base = av_inv_q(track->edit_rate);
2164 AVRational sample_rate = av_inv_q(st->time_base);
2165 const MXFSamplesPerFrame *spf = NULL;
2167 if ((sample_rate.num / sample_rate.den) == 48000)
2168 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2170 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2171 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2172 av_mul_q(sample_rate, time_base)));
2174 av_log(mxf->fc, AV_LOG_WARNING,
2175 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2176 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2180 while (spf->samples_per_frame[size]) {
2181 total += spf->samples_per_frame[size];
2187 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2188 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2189 *sample_count += spf->samples_per_frame[i];
2195 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2197 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2198 pkt->pts = track->sample_count;
2199 if ( codec->channels <= 0
2200 || av_get_bits_per_sample(codec->codec_id) <= 0
2201 || codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8)
2202 return AVERROR(EINVAL);
2203 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2207 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2210 MXFContext *mxf = s->priv_data;
2212 while (klv_read_packet(&klv, s->pb) == 0) {
2214 PRINT_KEY(s, "read packet", klv.key);
2215 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2216 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2217 ret = mxf_decrypt_triplet(s, pkt, &klv);
2219 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2220 return AVERROR_INVALIDDATA;
2224 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2225 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2226 int index = mxf_get_stream_index(s, &klv);
2227 int64_t next_ofs, next_klv;
2230 AVCodecContext *codec;
2233 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2237 st = s->streams[index];
2238 track = st->priv_data;
2240 if (s->streams[index]->discard == AVDISCARD_ALL)
2243 next_klv = avio_tell(s->pb) + klv.length;
2244 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2246 if (next_ofs >= 0 && next_klv > next_ofs) {
2247 /* if this check is hit then it's possible OPAtom was treated as OP1a
2248 * truncate the packet since it's probably very large (>2 GiB is common) */
2249 avpriv_request_sample(s,
2250 "OPAtom misinterpreted as OP1a?"
2251 "KLV for edit unit %i extending into "
2253 mxf->current_edit_unit);
2254 klv.length = next_ofs - avio_tell(s->pb);
2257 /* check for 8 channels AES3 element */
2258 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2259 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2260 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2261 return AVERROR_INVALIDDATA;
2264 ret = av_get_packet(s->pb, pkt, klv.length);
2268 pkt->stream_index = index;
2269 pkt->pos = klv.offset;
2271 codec = s->streams[index]->codec;
2272 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2273 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2274 MXFIndexTable *t = &mxf->index_tables[0];
2276 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2277 pkt->dts = mxf->current_edit_unit + t->first_dts;
2278 pkt->pts = t->ptses[mxf->current_edit_unit];
2279 } else if (track->intra_only) {
2280 /* intra-only -> PTS = EditUnit.
2281 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2282 pkt->pts = mxf->current_edit_unit;
2284 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2285 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2290 /* seek for truncated packets */
2291 avio_seek(s->pb, next_klv, SEEK_SET);
2296 avio_skip(s->pb, klv.length);
2298 return url_feof(s->pb) ? AVERROR_EOF : -1;
2301 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2303 MXFContext *mxf = s->priv_data;
2305 int64_t ret64, pos, next_pos;
2310 if (mxf->op != OPAtom)
2311 return mxf_read_packet_old(s, pkt);
2313 /* OPAtom - clip wrapped demuxing */
2314 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2316 t = &mxf->index_tables[0];
2318 if (mxf->current_edit_unit >= st->duration)
2321 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2323 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2326 /* compute size by finding the next edit unit or the end of the essence container
2327 * not pretty, but it works */
2328 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2329 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2330 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2331 return AVERROR_INVALIDDATA;
2334 if ((size = next_pos - pos) <= 0) {
2335 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2336 return AVERROR_INVALIDDATA;
2339 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2342 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2345 pkt->stream_index = 0;
2347 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2348 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2349 pkt->dts = mxf->current_edit_unit + t->first_dts;
2350 pkt->pts = t->ptses[mxf->current_edit_unit];
2351 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2352 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2357 mxf->current_edit_unit += edit_units;
2362 static int mxf_read_close(AVFormatContext *s)
2364 MXFContext *mxf = s->priv_data;
2365 MXFIndexTableSegment *seg;
2368 av_freep(&mxf->packages_refs);
2370 for (i = 0; i < s->nb_streams; i++)
2371 s->streams[i]->priv_data = NULL;
2373 for (i = 0; i < mxf->metadata_sets_count; i++) {
2374 switch (mxf->metadata_sets[i]->type) {
2376 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2378 case MultipleDescriptor:
2379 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2382 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2385 case MaterialPackage:
2386 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2388 case IndexTableSegment:
2389 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2390 av_freep(&seg->temporal_offset_entries);
2391 av_freep(&seg->flag_entries);
2392 av_freep(&seg->stream_offset_entries);
2397 av_freep(&mxf->metadata_sets[i]);
2399 av_freep(&mxf->partitions);
2400 av_freep(&mxf->metadata_sets);
2401 av_freep(&mxf->aesc);
2402 av_freep(&mxf->local_tags);
2404 if (mxf->index_tables) {
2405 for (i = 0; i < mxf->nb_index_tables; i++) {
2406 av_freep(&mxf->index_tables[i].segments);
2407 av_freep(&mxf->index_tables[i].ptses);
2408 av_freep(&mxf->index_tables[i].fake_index);
2411 av_freep(&mxf->index_tables);
2416 static int mxf_probe(AVProbeData *p) {
2417 const uint8_t *bufp = p->buf;
2418 const uint8_t *end = p->buf + p->buf_size;
2420 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2423 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2424 end -= sizeof(mxf_header_partition_pack_key);
2425 for (; bufp < end; bufp++) {
2426 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2427 return AVPROBE_SCORE_MAX;
2432 /* rudimentary byte seek */
2433 /* XXX: use MXF Index */
2434 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2436 AVStream *st = s->streams[stream_index];
2438 MXFContext* mxf = s->priv_data;
2443 MXFTrack *source_track = st->priv_data;
2445 /* if audio then truncate sample_time to EditRate */
2446 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2447 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2449 if (mxf->nb_index_tables <= 0) {
2451 return AVERROR_INVALIDDATA;
2452 if (sample_time < 0)
2454 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2456 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2458 ff_update_cur_dts(s, st, sample_time);
2459 mxf->current_edit_unit = sample_time;
2461 t = &mxf->index_tables[0];
2463 /* clamp above zero, else ff_index_search_timestamp() returns negative
2464 * this also means we allow seeking before the start */
2465 sample_time = FFMAX(sample_time, 0);
2467 if (t->fake_index) {
2468 /* behave as if we have a proper index */
2469 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2472 /* no IndexEntryArray (one or more CBR segments)
2473 * make sure we don't seek past the end */
2474 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2477 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2480 ff_update_cur_dts(s, st, sample_time);
2481 mxf->current_edit_unit = sample_time;
2482 avio_seek(s->pb, seekpos, SEEK_SET);
2485 // Update all tracks sample count
2486 for (i = 0; i < s->nb_streams; i++) {
2487 AVStream *cur_st = s->streams[i];
2488 MXFTrack *cur_track = cur_st->priv_data;
2489 uint64_t current_sample_count = 0;
2490 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2491 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2495 cur_track->sample_count = current_sample_count;
2501 AVInputFormat ff_mxf_demuxer = {
2503 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2504 .priv_data_size = sizeof(MXFContext),
2505 .read_probe = mxf_probe,
2506 .read_header = mxf_read_header,
2507 .read_packet = mxf_read_packet,
2508 .read_close = mxf_read_close,
2509 .read_seek = mxf_read_seek,