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 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
941 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
942 // sound essence container uls
943 { { 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 */
944 { { 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 */
945 { { 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 */
946 { { 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 */
947 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
950 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
952 int i, j, nb_segments = 0;
953 MXFIndexTableSegment **unsorted_segments;
954 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
956 /* count number of segments, allocate arrays and copy unsorted segments */
957 for (i = 0; i < mxf->metadata_sets_count; i++)
958 if (mxf->metadata_sets[i]->type == IndexTableSegment)
962 return AVERROR_INVALIDDATA;
964 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
965 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
966 av_freep(sorted_segments);
967 av_free(unsorted_segments);
968 return AVERROR(ENOMEM);
971 for (i = j = 0; i < mxf->metadata_sets_count; i++)
972 if (mxf->metadata_sets[i]->type == IndexTableSegment)
973 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
975 *nb_sorted_segments = 0;
977 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
978 for (i = 0; i < nb_segments; i++) {
979 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
980 uint64_t best_index_duration = 0;
982 for (j = 0; j < nb_segments; j++) {
983 MXFIndexTableSegment *s = unsorted_segments[j];
985 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
986 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
987 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
989 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
990 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
991 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
993 best_body_sid = s->body_sid;
994 best_index_sid = s->index_sid;
995 best_index_start = s->index_start_position;
996 best_index_duration = s->index_duration;
1000 /* no suitable entry found -> we're done */
1004 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1005 last_body_sid = best_body_sid;
1006 last_index_sid = best_index_sid;
1007 last_index_start = best_index_start;
1010 av_free(unsorted_segments);
1016 * Computes the absolute file offset of the given essence container offset
1018 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1021 int64_t offset_in = offset; /* for logging */
1023 for (x = 0; x < mxf->partitions_count; x++) {
1024 MXFPartition *p = &mxf->partitions[x];
1026 if (p->body_sid != body_sid)
1029 if (offset < p->essence_length || !p->essence_length) {
1030 *offset_out = p->essence_offset + offset;
1034 offset -= p->essence_length;
1037 av_log(mxf->fc, AV_LOG_ERROR,
1038 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1039 offset_in, body_sid);
1041 return AVERROR_INVALIDDATA;
1045 * Returns the end position of the essence container with given BodySID, or zero if unknown
1047 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1052 for (x = 0; x < mxf->partitions_count; x++) {
1053 MXFPartition *p = &mxf->partitions[x];
1055 if (p->body_sid != body_sid)
1058 if (!p->essence_length)
1061 ret = p->essence_offset + p->essence_length;
1067 /* EditUnit -> absolute offset */
1068 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)
1071 int64_t offset_temp = 0;
1073 for (i = 0; i < index_table->nb_segments; i++) {
1074 MXFIndexTableSegment *s = index_table->segments[i];
1076 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1078 if (edit_unit < s->index_start_position + s->index_duration) {
1079 int64_t index = edit_unit - s->index_start_position;
1081 if (s->edit_unit_byte_count)
1082 offset_temp += s->edit_unit_byte_count * index;
1083 else if (s->nb_index_entries) {
1084 if (s->nb_index_entries == 2 * s->index_duration + 1)
1085 index *= 2; /* Avid index */
1087 if (index < 0 || index >= s->nb_index_entries) {
1088 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1089 index_table->index_sid, s->index_start_position);
1090 return AVERROR_INVALIDDATA;
1093 offset_temp = s->stream_offset_entries[index];
1095 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1096 index_table->index_sid, s->index_start_position);
1097 return AVERROR_INVALIDDATA;
1101 *edit_unit_out = edit_unit;
1103 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1105 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1106 offset_temp += s->edit_unit_byte_count * s->index_duration;
1111 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);
1113 return AVERROR_INVALIDDATA;
1116 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1119 int8_t max_temporal_offset = -128;
1121 /* first compute how many entries we have */
1122 for (i = 0; i < index_table->nb_segments; i++) {
1123 MXFIndexTableSegment *s = index_table->segments[i];
1125 if (!s->nb_index_entries) {
1126 index_table->nb_ptses = 0;
1127 return 0; /* no TemporalOffsets */
1130 index_table->nb_ptses += s->index_duration;
1133 /* paranoid check */
1134 if (index_table->nb_ptses <= 0)
1137 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1138 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1139 av_freep(&index_table->ptses);
1140 return AVERROR(ENOMEM);
1143 /* we may have a few bad TemporalOffsets
1144 * make sure the corresponding PTSes don't have the bogus value 0 */
1145 for (x = 0; x < index_table->nb_ptses; x++)
1146 index_table->ptses[x] = AV_NOPTS_VALUE;
1160 * We want to transform it into this:
1171 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1172 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1173 * The latter makes DTS <= PTS.
1175 for (i = x = 0; i < index_table->nb_segments; i++) {
1176 MXFIndexTableSegment *s = index_table->segments[i];
1177 int index_delta = 1;
1178 int n = s->nb_index_entries;
1180 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1181 index_delta = 2; /* Avid index */
1182 /* ignore the last entry - it's the size of the essence container */
1186 for (j = 0; j < n; j += index_delta, x++) {
1187 int offset = s->temporal_offset_entries[j] / index_delta;
1188 int index = x + offset;
1190 if (x >= index_table->nb_ptses) {
1191 av_log(mxf->fc, AV_LOG_ERROR,
1192 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1193 s->nb_index_entries, s->index_duration);
1197 index_table->fake_index[x].timestamp = x;
1198 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1200 if (index < 0 || index >= index_table->nb_ptses) {
1201 av_log(mxf->fc, AV_LOG_ERROR,
1202 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1207 index_table->ptses[index] = x;
1208 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1212 index_table->first_dts = -max_temporal_offset;
1218 * Sorts and collects index table segments into index tables.
1219 * Also computes PTSes if possible.
1221 static int mxf_compute_index_tables(MXFContext *mxf)
1223 int i, j, k, ret, nb_sorted_segments;
1224 MXFIndexTableSegment **sorted_segments = NULL;
1226 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1227 nb_sorted_segments <= 0) {
1228 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1232 /* sanity check and count unique BodySIDs/IndexSIDs */
1233 for (i = 0; i < nb_sorted_segments; i++) {
1234 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1235 mxf->nb_index_tables++;
1236 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1237 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1238 ret = AVERROR_INVALIDDATA;
1239 goto finish_decoding_index;
1243 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1244 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1245 ret = AVERROR(ENOMEM);
1246 goto finish_decoding_index;
1249 /* distribute sorted segments to index tables */
1250 for (i = j = 0; i < nb_sorted_segments; i++) {
1251 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1256 mxf->index_tables[j].nb_segments++;
1259 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1260 MXFIndexTable *t = &mxf->index_tables[j];
1262 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1263 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1264 ret = AVERROR(ENOMEM);
1265 goto finish_decoding_index;
1268 if (sorted_segments[i]->index_start_position)
1269 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1270 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1272 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1273 t->index_sid = sorted_segments[i]->index_sid;
1274 t->body_sid = sorted_segments[i]->body_sid;
1276 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1277 goto finish_decoding_index;
1279 /* fix zero IndexDurations */
1280 for (k = 0; k < t->nb_segments; k++) {
1281 if (t->segments[k]->index_duration)
1284 if (t->nb_segments > 1)
1285 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1288 if (mxf->fc->nb_streams <= 0) {
1289 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1293 /* assume the first stream's duration is reasonable
1294 * leave index_duration = 0 on further segments in case we have any (unlikely)
1296 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1302 finish_decoding_index:
1303 av_free(sorted_segments);
1307 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1309 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1310 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1311 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1312 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1315 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1317 char buf[AV_TIMECODE_STR_SIZE];
1318 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1323 static int mxf_parse_structural_metadata(MXFContext *mxf)
1325 MXFPackage *material_package = NULL;
1326 MXFPackage *temp_package = NULL;
1329 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1330 /* TODO: handle multiple material packages (OP3x) */
1331 for (i = 0; i < mxf->packages_count; i++) {
1332 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1333 if (material_package) break;
1335 if (!material_package) {
1336 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1337 return AVERROR_INVALIDDATA;
1340 for (i = 0; i < material_package->tracks_count; i++) {
1341 MXFPackage *source_package = NULL;
1342 MXFTrack *material_track = NULL;
1343 MXFTrack *source_track = NULL;
1344 MXFTrack *temp_track = NULL;
1345 MXFDescriptor *descriptor = NULL;
1346 MXFStructuralComponent *component = NULL;
1347 MXFTimecodeComponent *mxf_tc = NULL;
1348 UID *essence_container_ul = NULL;
1349 const MXFCodecUL *codec_ul = NULL;
1350 const MXFCodecUL *container_ul = NULL;
1351 const MXFCodecUL *pix_fmt_ul = NULL;
1356 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1357 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1361 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1362 mxf_tc = (MXFTimecodeComponent*)component;
1363 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1364 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1365 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1369 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1370 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1374 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1375 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1379 mxf_tc = (MXFTimecodeComponent*)component;
1380 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1381 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1382 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1387 /* TODO: handle multiple source clips */
1388 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1389 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1393 for (k = 0; k < mxf->packages_count; k++) {
1394 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1397 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1398 source_package = temp_package;
1402 if (!source_package) {
1403 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1406 for (k = 0; k < source_package->tracks_count; k++) {
1407 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1408 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1409 ret = AVERROR_INVALIDDATA;
1412 if (temp_track->track_id == component->source_track_id) {
1413 source_track = temp_track;
1417 if (!source_track) {
1418 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1422 if (!source_track || !component)
1425 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1426 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1427 ret = AVERROR_INVALIDDATA;
1431 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1432 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1433 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1434 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1438 st = avformat_new_stream(mxf->fc, NULL);
1440 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1441 ret = AVERROR(ENOMEM);
1444 st->id = source_track->track_id;
1445 st->priv_data = source_track;
1446 source_track->original_duration = st->duration = component->duration;
1447 if (st->duration == -1)
1448 st->duration = AV_NOPTS_VALUE;
1449 st->start_time = component->start_position;
1450 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1451 av_log(mxf->fc, AV_LOG_WARNING,
1452 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1453 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1454 material_track->edit_rate = (AVRational){25, 1};
1456 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1458 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1459 source_track->edit_rate = material_track->edit_rate;
1461 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1462 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1463 st->codec->codec_type = codec_ul->id;
1465 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1466 if (source_package->descriptor) {
1467 if (source_package->descriptor->type == MultipleDescriptor) {
1468 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1469 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1471 if (!sub_descriptor) {
1472 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1475 if (sub_descriptor->linked_track_id == source_track->track_id) {
1476 descriptor = sub_descriptor;
1480 } else if (source_package->descriptor->type == Descriptor)
1481 descriptor = source_package->descriptor;
1484 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1487 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1488 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1489 essence_container_ul = &descriptor->essence_container_ul;
1490 /* HACK: replacing the original key with mxf_encrypted_essence_container
1491 * is not allowed according to s429-6, try to find correct information anyway */
1492 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1493 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1494 for (k = 0; k < mxf->metadata_sets_count; k++) {
1495 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1496 if (metadata->type == CryptoContext) {
1497 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1503 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1504 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1505 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1506 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1507 avcodec_get_name(st->codec->codec_id));
1508 for (k = 0; k < 16; k++) {
1509 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1510 descriptor->essence_codec_ul[k]);
1511 if (!(k+1 & 19) || k == 5)
1512 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1514 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1515 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1516 source_track->intra_only = mxf_is_intra_only(descriptor);
1517 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1518 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1519 st->codec->codec_id = container_ul->id;
1520 st->codec->width = descriptor->width;
1521 st->codec->height = descriptor->height; /* Field height, not frame height */
1522 switch (descriptor->frame_layout) {
1523 case SegmentedFrame:
1524 /* This one is a weird layout I don't fully understand. */
1525 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1528 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1531 /* Every other line is stored and needs to be duplicated. */
1532 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1533 break; /* The correct thing to do here is fall through, but by breaking we might be
1534 able to decode some streams at half the vertical resolution, rather than not al all.
1535 It's also for compatibility with the old behavior. */
1538 case SeparateFields:
1539 st->codec->height *= 2; /* Turn field height into frame height. */
1542 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1544 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1545 st->codec->pix_fmt = descriptor->pix_fmt;
1546 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1547 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1548 &descriptor->essence_codec_ul);
1549 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1550 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1551 /* support files created before RP224v10 by defaulting to UYVY422
1552 if subsampling is 4:2:2 and component depth is 8-bit */
1553 if (descriptor->horiz_subsampling == 2 &&
1554 descriptor->vert_subsampling == 1 &&
1555 descriptor->component_depth == 8) {
1556 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1561 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1562 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1563 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1564 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1565 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))
1566 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1567 st->codec->channels = descriptor->channels;
1568 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1570 if (descriptor->sample_rate.den > 0) {
1571 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1572 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1574 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) found for stream #%d, time base forced to 1/48000\n",
1575 descriptor->sample_rate.num, descriptor->sample_rate.den, st->index);
1576 avpriv_set_pts_info(st, 64, 1, 48000);
1579 /* if duration is set, rescale it from EditRate to SampleRate */
1580 if (st->duration != AV_NOPTS_VALUE)
1581 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1583 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1584 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1585 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1586 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1587 else if (descriptor->bits_per_sample == 32)
1588 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1589 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1590 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1591 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1592 else if (descriptor->bits_per_sample == 32)
1593 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1594 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1595 st->need_parsing = AVSTREAM_PARSE_FULL;
1598 if (descriptor->extradata) {
1599 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1600 if (st->codec->extradata) {
1601 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1602 st->codec->extradata_size = descriptor->extradata_size;
1604 } else if(st->codec->codec_id == AV_CODEC_ID_H264) {
1605 ff_generate_avci_extradata(st);
1607 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1608 /* TODO: decode timestamps */
1609 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1618 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1624 return AVERROR(EINVAL);
1626 buf_size = size + size/2 + 1;
1627 *str = av_malloc(buf_size);
1629 return AVERROR(ENOMEM);
1631 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1639 static int mxf_uid_to_str(UID uid, char **str)
1643 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1645 return AVERROR(ENOMEM);
1646 for (i = 0; i < sizeof(UID); i++) {
1647 snprintf(p, 2 + 1, "%.2x", uid[i]);
1649 if (i == 3 || i == 5 || i == 7 || i == 9) {
1650 snprintf(p, 1 + 1, "-");
1657 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1659 struct tm time = {0};
1660 time.tm_year = (timestamp >> 48) - 1900;
1661 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1662 time.tm_mday = (timestamp >> 32 & 0xFF);
1663 time.tm_hour = (timestamp >> 24 & 0xFF);
1664 time.tm_min = (timestamp >> 16 & 0xFF);
1665 time.tm_sec = (timestamp >> 8 & 0xFF);
1667 /* ensure month/day are valid */
1668 time.tm_mon = FFMAX(time.tm_mon, 0);
1669 time.tm_mday = FFMAX(time.tm_mday, 1);
1671 *str = av_mallocz(32);
1673 return AVERROR(ENOMEM);
1674 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1679 #define SET_STR_METADATA(pb, name, str) do { \
1680 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1682 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1685 #define SET_UID_METADATA(pb, name, var, str) do { \
1686 avio_read(pb, var, 16); \
1687 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1689 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1692 #define SET_TS_METADATA(pb, name, var, str) do { \
1693 var = avio_rb64(pb); \
1694 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1696 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1699 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1701 MXFContext *mxf = arg;
1702 AVFormatContext *s = mxf->fc;
1709 SET_STR_METADATA(pb, "company_name", str);
1712 SET_STR_METADATA(pb, "product_name", str);
1715 SET_STR_METADATA(pb, "product_version", str);
1718 SET_UID_METADATA(pb, "product_uid", uid, str);
1721 SET_TS_METADATA(pb, "modification_date", ts, str);
1724 SET_STR_METADATA(pb, "application_platform", str);
1727 SET_UID_METADATA(pb, "generation_uid", uid, str);
1730 SET_UID_METADATA(pb, "uid", uid, str);
1736 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1737 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1738 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1739 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1740 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1755 { { 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 */
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1758 { { 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 */
1759 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1762 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1766 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1769 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1771 AVIOContext *pb = mxf->fc->pb;
1772 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1773 uint64_t klv_end = avio_tell(pb) + klv->length;
1776 return AVERROR(ENOMEM);
1777 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1779 int tag = avio_rb16(pb);
1780 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1781 uint64_t next = avio_tell(pb) + size;
1784 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1785 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1786 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1789 if (tag > 0x7FFF) { /* dynamic tag */
1791 for (i = 0; i < mxf->local_tags_count; i++) {
1792 int local_tag = AV_RB16(mxf->local_tags+i*18);
1793 if (local_tag == tag) {
1794 memcpy(uid, mxf->local_tags+i*18+2, 16);
1795 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1796 PRINT_KEY(mxf->fc, "uid", uid);
1800 if (ctx_size && tag == 0x3C0A)
1801 avio_read(pb, ctx->uid, 16);
1802 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1805 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1806 * it extending past the end of the KLV though (zzuf5.mxf). */
1807 if (avio_tell(pb) > klv_end) {
1811 av_log(mxf->fc, AV_LOG_ERROR,
1812 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1814 return AVERROR_INVALIDDATA;
1815 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1816 avio_seek(pb, next, SEEK_SET);
1818 if (ctx_size) ctx->type = type;
1819 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1823 * Seeks to the previous partition, if possible
1824 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1826 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1828 AVIOContext *pb = mxf->fc->pb;
1830 if (!mxf->current_partition ||
1831 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1832 return 0; /* we've parsed all partitions */
1834 /* seek to previous partition */
1835 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1836 mxf->current_partition = NULL;
1838 av_dlog(mxf->fc, "seeking to previous partition\n");
1844 * Called when essence is encountered
1845 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1847 static int mxf_parse_handle_essence(MXFContext *mxf)
1849 AVIOContext *pb = mxf->fc->pb;
1852 if (mxf->parsing_backward) {
1853 return mxf_seek_to_previous_partition(mxf);
1855 if (!mxf->footer_partition) {
1856 av_dlog(mxf->fc, "no footer\n");
1860 av_dlog(mxf->fc, "seeking to footer\n");
1862 /* remember where we were so we don't end up seeking further back than this */
1863 mxf->last_forward_tell = avio_tell(pb);
1865 if (!pb->seekable) {
1866 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1870 /* seek to footer partition and parse backward */
1871 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1872 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1873 mxf->run_in + mxf->footer_partition, ret);
1877 mxf->current_partition = NULL;
1878 mxf->parsing_backward = 1;
1885 * Called when the next partition or EOF is encountered
1886 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1888 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1890 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1894 * Figures out the proper offset and length of the essence container in each partition
1896 static void mxf_compute_essence_containers(MXFContext *mxf)
1900 /* everything is already correct */
1901 if (mxf->op == OPAtom)
1904 for (x = 0; x < mxf->partitions_count; x++) {
1905 MXFPartition *p = &mxf->partitions[x];
1908 continue; /* BodySID == 0 -> no essence */
1910 if (x >= mxf->partitions_count - 1)
1911 break; /* last partition - can't compute length (and we don't need to) */
1913 /* essence container spans to the next partition */
1914 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1916 if (p->essence_length < 0) {
1917 /* next ThisPartition < essence_offset */
1918 p->essence_length = 0;
1919 av_log(mxf->fc, AV_LOG_ERROR,
1920 "partition %i: bad ThisPartition = %"PRIX64"\n",
1921 x+1, mxf->partitions[x+1].this_partition);
1926 static int64_t round_to_kag(int64_t position, int kag_size)
1928 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1929 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1930 int64_t ret = (position / kag_size) * kag_size;
1931 return ret == position ? ret : ret + kag_size;
1934 static int is_pcm(enum AVCodecID codec_id)
1936 /* we only care about "normal" PCM codecs until we get samples */
1937 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1941 * Deal with the case where for some audio atoms EditUnitByteCount is
1942 * very small (2, 4..). In those cases we should read more than one
1943 * sample per call to mxf_read_packet().
1945 static void mxf_handle_small_eubc(AVFormatContext *s)
1947 MXFContext *mxf = s->priv_data;
1949 /* assuming non-OPAtom == frame wrapped
1950 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1951 if (mxf->op != OPAtom)
1954 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1955 if (s->nb_streams != 1 ||
1956 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1957 !is_pcm(s->streams[0]->codec->codec_id) ||
1958 mxf->nb_index_tables != 1 ||
1959 mxf->index_tables[0].nb_segments != 1 ||
1960 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1963 /* arbitrarily default to 48 kHz PAL audio frame size */
1964 /* TODO: We could compute this from the ratio between the audio
1965 * and video edit rates for 48 kHz NTSC we could use the
1966 * 1802-1802-1802-1802-1801 pattern. */
1967 mxf->edit_units_per_packet = 1920;
1970 static int mxf_read_header(AVFormatContext *s)
1972 MXFContext *mxf = s->priv_data;
1974 int64_t essence_offset = 0;
1977 mxf->last_forward_tell = INT64_MAX;
1978 mxf->edit_units_per_packet = 1;
1980 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1981 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1982 return AVERROR_INVALIDDATA;
1984 avio_seek(s->pb, -14, SEEK_CUR);
1986 mxf->run_in = avio_tell(s->pb);
1988 while (!url_feof(s->pb)) {
1989 const MXFMetadataReadTableEntry *metadata;
1991 if (klv_read_packet(&klv, s->pb) < 0) {
1992 /* EOF - seek to previous partition or stop */
1993 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1999 PRINT_KEY(s, "read header", klv.key);
2000 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2001 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2002 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2003 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2004 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2006 if (!mxf->current_partition) {
2007 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2008 return AVERROR_INVALIDDATA;
2011 if (!mxf->current_partition->essence_offset) {
2012 /* for OP1a we compute essence_offset
2013 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2014 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2015 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2017 int64_t op1a_essence_offset =
2018 round_to_kag(mxf->current_partition->this_partition +
2019 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2020 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2021 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2023 if (mxf->op == OPAtom) {
2024 /* point essence_offset to the actual data
2025 * OPAtom has all the essence in one big KLV
2027 mxf->current_partition->essence_offset = avio_tell(s->pb);
2028 mxf->current_partition->essence_length = klv.length;
2030 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2031 mxf->current_partition->essence_offset = op1a_essence_offset;
2035 if (!essence_offset)
2036 essence_offset = klv.offset;
2038 /* seek to footer, previous partition or stop */
2039 if (mxf_parse_handle_essence(mxf) <= 0)
2042 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2043 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2044 /* next partition pack - keep going, seek to previous partition or stop */
2045 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2047 else if (mxf->parsing_backward)
2049 /* we're still parsing forward. proceed to parsing this partition pack */
2052 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2053 if (IS_KLV_KEY(klv.key, metadata->key)) {
2055 if (klv.key[5] == 0x53) {
2056 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2058 uint64_t next = avio_tell(s->pb) + klv.length;
2059 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2061 /* only seek forward, else this can loop for a long time */
2062 if (avio_tell(s->pb) > next) {
2063 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2065 return AVERROR_INVALIDDATA;
2068 avio_seek(s->pb, next, SEEK_SET);
2071 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2077 if (!metadata->read)
2078 avio_skip(s->pb, klv.length);
2080 /* FIXME avoid seek */
2081 if (!essence_offset) {
2082 av_log(s, AV_LOG_ERROR, "no essence\n");
2083 return AVERROR_INVALIDDATA;
2085 avio_seek(s->pb, essence_offset, SEEK_SET);
2087 mxf_compute_essence_containers(mxf);
2089 /* we need to do this before computing the index tables
2090 * to be able to fill in zero IndexDurations with st->duration */
2091 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2094 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2097 if (mxf->nb_index_tables > 1) {
2098 /* TODO: look up which IndexSID to use via EssenceContainerData */
2099 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2100 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2101 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2102 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2103 ret = AVERROR_INVALIDDATA;
2107 mxf_handle_small_eubc(s);
2117 * Sets mxf->current_edit_unit based on what offset we're currently at.
2118 * @return next_ofs if OK, <0 on error
2120 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2122 int64_t last_ofs = -1, next_ofs = -1;
2123 MXFIndexTable *t = &mxf->index_tables[0];
2125 /* this is called from the OP1a demuxing logic, which means there
2126 * may be no index tables */
2127 if (mxf->nb_index_tables <= 0)
2130 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2131 while (mxf->current_edit_unit >= 0) {
2132 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2135 if (next_ofs <= last_ofs) {
2136 /* large next_ofs didn't change or current_edit_unit wrapped
2137 * around this fixes the infinite loop on zzuf3.mxf */
2138 av_log(mxf->fc, AV_LOG_ERROR,
2139 "next_ofs didn't change. not deriving packet timestamps\n");
2143 if (next_ofs > current_offset)
2146 last_ofs = next_ofs;
2147 mxf->current_edit_unit++;
2150 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2151 if (mxf->current_edit_unit < 0)
2157 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2159 int i, total = 0, size = 0;
2160 AVStream *st = mxf->fc->streams[stream_index];
2161 MXFTrack *track = st->priv_data;
2162 AVRational time_base = av_inv_q(track->edit_rate);
2163 AVRational sample_rate = av_inv_q(st->time_base);
2164 const MXFSamplesPerFrame *spf = NULL;
2166 if ((sample_rate.num / sample_rate.den) == 48000)
2167 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2169 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2170 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2171 av_mul_q(sample_rate, time_base)));
2173 av_log(mxf->fc, AV_LOG_WARNING,
2174 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2175 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2179 while (spf->samples_per_frame[size]) {
2180 total += spf->samples_per_frame[size];
2186 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2187 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2188 *sample_count += spf->samples_per_frame[i];
2194 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2196 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2197 pkt->pts = track->sample_count;
2198 if (codec->channels <= 0 || av_get_bits_per_sample(codec->codec_id) <= 0)
2199 return AVERROR(EINVAL);
2200 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2204 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2207 MXFContext *mxf = s->priv_data;
2209 while (klv_read_packet(&klv, s->pb) == 0) {
2211 PRINT_KEY(s, "read packet", klv.key);
2212 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2213 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2214 ret = mxf_decrypt_triplet(s, pkt, &klv);
2216 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2217 return AVERROR_INVALIDDATA;
2221 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2222 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2223 int index = mxf_get_stream_index(s, &klv);
2224 int64_t next_ofs, next_klv;
2227 AVCodecContext *codec;
2230 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2234 st = s->streams[index];
2235 track = st->priv_data;
2237 if (s->streams[index]->discard == AVDISCARD_ALL)
2240 next_klv = avio_tell(s->pb) + klv.length;
2241 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2243 if (next_ofs >= 0 && next_klv > next_ofs) {
2244 /* if this check is hit then it's possible OPAtom was treated as OP1a
2245 * truncate the packet since it's probably very large (>2 GiB is common) */
2246 avpriv_request_sample(s,
2247 "OPAtom misinterpreted as OP1a?"
2248 "KLV for edit unit %i extending into "
2250 mxf->current_edit_unit);
2251 klv.length = next_ofs - avio_tell(s->pb);
2254 /* check for 8 channels AES3 element */
2255 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2256 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2257 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2258 return AVERROR_INVALIDDATA;
2261 ret = av_get_packet(s->pb, pkt, klv.length);
2265 pkt->stream_index = index;
2266 pkt->pos = klv.offset;
2268 codec = s->streams[index]->codec;
2269 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2270 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2271 MXFIndexTable *t = &mxf->index_tables[0];
2273 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2274 pkt->dts = mxf->current_edit_unit + t->first_dts;
2275 pkt->pts = t->ptses[mxf->current_edit_unit];
2276 } else if (track->intra_only) {
2277 /* intra-only -> PTS = EditUnit.
2278 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2279 pkt->pts = mxf->current_edit_unit;
2281 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2282 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2287 /* seek for truncated packets */
2288 avio_seek(s->pb, next_klv, SEEK_SET);
2293 avio_skip(s->pb, klv.length);
2295 return url_feof(s->pb) ? AVERROR_EOF : -1;
2298 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2300 MXFContext *mxf = s->priv_data;
2302 int64_t ret64, pos, next_pos;
2307 if (mxf->op != OPAtom)
2308 return mxf_read_packet_old(s, pkt);
2310 /* OPAtom - clip wrapped demuxing */
2311 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2313 t = &mxf->index_tables[0];
2315 if (mxf->current_edit_unit >= st->duration)
2318 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2320 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2323 /* compute size by finding the next edit unit or the end of the essence container
2324 * not pretty, but it works */
2325 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2326 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2327 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2328 return AVERROR_INVALIDDATA;
2331 if ((size = next_pos - pos) <= 0) {
2332 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2333 return AVERROR_INVALIDDATA;
2336 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2339 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2342 pkt->stream_index = 0;
2344 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2345 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2346 pkt->dts = mxf->current_edit_unit + t->first_dts;
2347 pkt->pts = t->ptses[mxf->current_edit_unit];
2348 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2349 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2354 mxf->current_edit_unit += edit_units;
2359 static int mxf_read_close(AVFormatContext *s)
2361 MXFContext *mxf = s->priv_data;
2362 MXFIndexTableSegment *seg;
2365 av_freep(&mxf->packages_refs);
2367 for (i = 0; i < s->nb_streams; i++)
2368 s->streams[i]->priv_data = NULL;
2370 for (i = 0; i < mxf->metadata_sets_count; i++) {
2371 switch (mxf->metadata_sets[i]->type) {
2373 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2375 case MultipleDescriptor:
2376 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2379 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2382 case MaterialPackage:
2383 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2385 case IndexTableSegment:
2386 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2387 av_freep(&seg->temporal_offset_entries);
2388 av_freep(&seg->flag_entries);
2389 av_freep(&seg->stream_offset_entries);
2394 av_freep(&mxf->metadata_sets[i]);
2396 av_freep(&mxf->partitions);
2397 av_freep(&mxf->metadata_sets);
2398 av_freep(&mxf->aesc);
2399 av_freep(&mxf->local_tags);
2401 if (mxf->index_tables) {
2402 for (i = 0; i < mxf->nb_index_tables; i++) {
2403 av_freep(&mxf->index_tables[i].segments);
2404 av_freep(&mxf->index_tables[i].ptses);
2405 av_freep(&mxf->index_tables[i].fake_index);
2408 av_freep(&mxf->index_tables);
2413 static int mxf_probe(AVProbeData *p) {
2414 const uint8_t *bufp = p->buf;
2415 const uint8_t *end = p->buf + p->buf_size;
2417 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2420 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2421 end -= sizeof(mxf_header_partition_pack_key);
2422 for (; bufp < end; bufp++) {
2423 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2424 return AVPROBE_SCORE_MAX;
2429 /* rudimentary byte seek */
2430 /* XXX: use MXF Index */
2431 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2433 AVStream *st = s->streams[stream_index];
2435 MXFContext* mxf = s->priv_data;
2440 MXFTrack *source_track = st->priv_data;
2442 /* if audio then truncate sample_time to EditRate */
2443 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2444 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2446 if (mxf->nb_index_tables <= 0) {
2448 return AVERROR_INVALIDDATA;
2449 if (sample_time < 0)
2451 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2453 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2455 ff_update_cur_dts(s, st, sample_time);
2456 mxf->current_edit_unit = sample_time;
2458 t = &mxf->index_tables[0];
2460 /* clamp above zero, else ff_index_search_timestamp() returns negative
2461 * this also means we allow seeking before the start */
2462 sample_time = FFMAX(sample_time, 0);
2464 if (t->fake_index) {
2465 /* behave as if we have a proper index */
2466 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2469 /* no IndexEntryArray (one or more CBR segments)
2470 * make sure we don't seek past the end */
2471 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2474 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2477 ff_update_cur_dts(s, st, sample_time);
2478 mxf->current_edit_unit = sample_time;
2479 avio_seek(s->pb, seekpos, SEEK_SET);
2482 // Update all tracks sample count
2483 for (i = 0; i < s->nb_streams; i++) {
2484 AVStream *cur_st = s->streams[i];
2485 MXFTrack *cur_track = cur_st->priv_data;
2486 uint64_t current_sample_count = 0;
2487 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2488 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2492 cur_track->sample_count = current_sample_count;
2498 AVInputFormat ff_mxf_demuxer = {
2500 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2501 .priv_data_size = sizeof(MXFContext),
2502 .read_probe = mxf_probe,
2503 .read_header = mxf_read_header,
2504 .read_packet = mxf_read_packet,
2505 .read_close = mxf_read_close,
2506 .read_seek = mxf_read_seek,