3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/timecode.h"
74 OPSONYOpt, /* FATE sample, violates the spec in places */
80 MXFPartitionType type;
81 uint64_t previous_partition;
84 int64_t this_partition;
85 int64_t essence_offset; ///< absolute offset of essence
86 int64_t essence_length;
88 int64_t header_byte_count;
89 int64_t index_byte_count;
95 enum MXFMetadataSetType type;
96 UID source_container_ul;
101 enum MXFMetadataSetType type;
102 UID source_package_uid;
103 UID data_definition_ul;
105 int64_t start_position;
107 } MXFStructuralComponent;
111 enum MXFMetadataSetType type;
112 UID data_definition_ul;
113 UID *structural_components_refs;
114 int structural_components_count;
120 enum MXFMetadataSetType type;
123 struct AVRational rate;
125 } MXFTimecodeComponent;
129 enum MXFMetadataSetType type;
130 MXFSequence *sequence; /* mandatory, and only one */
133 uint8_t track_number[4];
134 AVRational edit_rate;
136 uint64_t sample_count;
137 int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate
142 enum MXFMetadataSetType type;
143 UID essence_container_ul;
144 UID essence_codec_ul;
145 AVRational sample_rate;
146 AVRational aspect_ratio;
148 int height; /* Field height, not frame height */
149 int frame_layout; /* See MXFFrameLayout enum */
153 unsigned int component_depth;
154 unsigned int horiz_subsampling;
155 unsigned int vert_subsampling;
156 UID *sub_descriptors_refs;
157 int sub_descriptors_count;
161 enum AVPixelFormat pix_fmt;
166 enum MXFMetadataSetType type;
167 int edit_unit_byte_count;
170 AVRational index_edit_rate;
171 uint64_t index_start_position;
172 uint64_t index_duration;
173 int8_t *temporal_offset_entries;
175 uint64_t *stream_offset_entries;
176 int nb_index_entries;
177 } MXFIndexTableSegment;
181 enum MXFMetadataSetType type;
185 MXFDescriptor *descriptor; /* only one */
191 enum MXFMetadataSetType type;
194 /* decoded index table */
198 int nb_ptses; /* number of PTSes or total duration of index */
199 int64_t first_dts; /* DTS = EditUnit + first_dts */
200 int64_t *ptses; /* maps EditUnit -> PTS */
202 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
203 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
207 MXFPartition *partitions;
208 unsigned partitions_count;
212 MXFMetadataSet **metadata_sets;
213 int metadata_sets_count;
217 int local_tags_count;
218 uint64_t footer_partition;
219 KLVPacket current_klv_data;
220 int current_klv_index;
222 MXFPartition *current_partition;
223 int parsing_backward;
224 int64_t last_forward_tell;
225 int last_forward_partition;
226 int current_edit_unit;
228 MXFIndexTable *index_tables;
229 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
232 enum MXFWrappingScheme {
237 /* NOTE: klv_offset is not set (-1) for local keys */
238 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
242 MXFMetadataReadFunc *read;
244 enum MXFMetadataSetType type;
245 } MXFMetadataReadTableEntry;
247 static int mxf_read_close(AVFormatContext *s);
249 /* partial keys to match */
250 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
251 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
252 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
253 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
254 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
255 /* complete keys to match */
256 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 };
257 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
258 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
259 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
261 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
263 static int64_t klv_decode_ber_length(AVIOContext *pb)
265 uint64_t size = avio_r8(pb);
266 if (size & 0x80) { /* long form */
267 int bytes_num = size & 0x7f;
268 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
270 return AVERROR_INVALIDDATA;
273 size = size << 8 | avio_r8(pb);
278 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
281 for (i = 0; i < size && !url_feof(pb); i++) {
285 else if (b != key[i])
291 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
293 if (!mxf_read_sync(pb, mxf_klv_key, 4))
294 return AVERROR_INVALIDDATA;
295 klv->offset = avio_tell(pb) - 4;
296 memcpy(klv->key, mxf_klv_key, 4);
297 avio_read(pb, klv->key + 4, 12);
298 klv->length = klv_decode_ber_length(pb);
299 return klv->length == -1 ? -1 : 0;
302 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
306 for (i = 0; i < s->nb_streams; i++) {
307 MXFTrack *track = s->streams[i]->priv_data;
309 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
312 /* return 0 if only one stream, for OP Atom files with 0 as track number */
313 return s->nb_streams == 1 ? 0 : -1;
316 /* XXX: use AVBitStreamFilter */
317 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
319 const uint8_t *buf_ptr, *end_ptr;
323 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
324 return AVERROR_INVALIDDATA;
325 length = av_get_packet(pb, pkt, length);
328 data_ptr = pkt->data;
329 end_ptr = pkt->data + length;
330 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
331 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
332 for (i = 0; i < st->codec->channels; i++) {
333 uint32_t sample = bytestream_get_le32(&buf_ptr);
334 if (st->codec->bits_per_coded_sample == 24)
335 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
337 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
339 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
341 av_shrink_packet(pkt, data_ptr - pkt->data);
345 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
347 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
348 MXFContext *mxf = s->priv_data;
349 AVIOContext *pb = s->pb;
350 int64_t end = avio_tell(pb) + klv->length;
353 uint64_t plaintext_size;
358 if (!mxf->aesc && s->key && s->keylen == 16) {
359 mxf->aesc = av_aes_alloc();
361 return AVERROR(ENOMEM);
362 av_aes_init(mxf->aesc, s->key, 128, 1);
365 avio_skip(pb, klv_decode_ber_length(pb));
367 klv_decode_ber_length(pb);
368 plaintext_size = avio_rb64(pb);
370 klv_decode_ber_length(pb);
371 avio_read(pb, klv->key, 16);
372 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
373 return AVERROR_INVALIDDATA;
374 index = mxf_get_stream_index(s, klv);
376 return AVERROR_INVALIDDATA;
378 klv_decode_ber_length(pb);
379 orig_size = avio_rb64(pb);
380 if (orig_size < plaintext_size)
381 return AVERROR_INVALIDDATA;
383 size = klv_decode_ber_length(pb);
384 if (size < 32 || size - 32 < orig_size)
385 return AVERROR_INVALIDDATA;
386 avio_read(pb, ivec, 16);
387 avio_read(pb, tmpbuf, 16);
389 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
390 if (memcmp(tmpbuf, checkv, 16))
391 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
393 size = av_get_packet(pb, pkt, size);
396 else if (size < plaintext_size)
397 return AVERROR_INVALIDDATA;
398 size -= plaintext_size;
400 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
401 &pkt->data[plaintext_size], size >> 4, ivec, 1);
402 av_shrink_packet(pkt, orig_size);
403 pkt->stream_index = index;
404 avio_skip(pb, end - avio_tell(pb));
408 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
410 MXFContext *mxf = arg;
411 int item_num = avio_rb32(pb);
412 int item_len = avio_rb32(pb);
414 if (item_len != 18) {
415 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
416 return AVERROR_PATCHWELCOME;
418 if (item_num > 65536) {
419 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
420 return AVERROR_INVALIDDATA;
422 mxf->local_tags = av_calloc(item_num, item_len);
423 if (!mxf->local_tags)
424 return AVERROR(ENOMEM);
425 mxf->local_tags_count = item_num;
426 avio_read(pb, mxf->local_tags, item_num*item_len);
430 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
432 MXFContext *mxf = arg;
433 MXFPartition *partition, *tmp_part;
435 uint64_t footer_partition;
436 uint32_t nb_essence_containers;
438 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
439 return AVERROR(ENOMEM);
441 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
443 return AVERROR(ENOMEM);
444 mxf->partitions = tmp_part;
446 if (mxf->parsing_backward) {
447 /* insert the new partition pack in the middle
448 * this makes the entries in mxf->partitions sorted by offset */
449 memmove(&mxf->partitions[mxf->last_forward_partition+1],
450 &mxf->partitions[mxf->last_forward_partition],
451 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
452 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
454 mxf->last_forward_partition++;
455 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
458 memset(partition, 0, sizeof(*partition));
459 mxf->partitions_count++;
460 partition->pack_length = avio_tell(pb) - klv_offset + size;
464 partition->type = Header;
467 partition->type = BodyPartition;
470 partition->type = Footer;
473 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
474 return AVERROR_INVALIDDATA;
477 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
478 partition->closed = partition->type == Footer || !(uid[14] & 1);
479 partition->complete = uid[14] > 2;
481 partition->kag_size = avio_rb32(pb);
482 partition->this_partition = avio_rb64(pb);
483 partition->previous_partition = avio_rb64(pb);
484 footer_partition = avio_rb64(pb);
485 partition->header_byte_count = avio_rb64(pb);
486 partition->index_byte_count = avio_rb64(pb);
487 partition->index_sid = avio_rb32(pb);
489 partition->body_sid = avio_rb32(pb);
490 avio_read(pb, op, sizeof(UID));
491 nb_essence_containers = avio_rb32(pb);
493 /* some files don'thave FooterPartition set in every partition */
494 if (footer_partition) {
495 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
496 av_log(mxf->fc, AV_LOG_ERROR,
497 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
498 mxf->footer_partition, footer_partition);
500 mxf->footer_partition = footer_partition;
505 "PartitionPack: ThisPartition = 0x%"PRIX64
506 ", PreviousPartition = 0x%"PRIX64", "
507 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
508 partition->this_partition,
509 partition->previous_partition, footer_partition,
510 partition->index_sid, partition->body_sid);
512 /* sanity check PreviousPartition if set */
513 if (partition->previous_partition &&
514 mxf->run_in + partition->previous_partition >= klv_offset) {
515 av_log(mxf->fc, AV_LOG_ERROR,
516 "PreviousPartition points to this partition or forward\n");
517 return AVERROR_INVALIDDATA;
520 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
521 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
522 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
523 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
524 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
525 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
526 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
527 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
528 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
529 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
530 else if (op[12] == 0x10) {
531 /* SMPTE 390m: "There shall be exactly one essence container"
532 * The following block deals with files that violate this, namely:
533 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
534 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
535 if (nb_essence_containers != 1) {
536 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
540 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
541 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
547 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
551 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
552 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
554 if (mxf->op == OPSONYOpt)
555 partition->kag_size = 512;
557 partition->kag_size = 1;
559 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
565 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
567 MXFMetadataSet **tmp;
568 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
569 return AVERROR(ENOMEM);
570 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
572 return AVERROR(ENOMEM);
573 mxf->metadata_sets = tmp;
574 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
575 mxf->metadata_sets_count++;
579 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
581 MXFCryptoContext *cryptocontext = arg;
583 return AVERROR_INVALIDDATA;
584 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
585 avio_read(pb, cryptocontext->source_container_ul, 16);
589 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
591 MXFContext *mxf = arg;
594 mxf->packages_count = avio_rb32(pb);
595 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
596 if (!mxf->packages_refs)
597 return AVERROR(ENOMEM);
598 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
599 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
605 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
607 MXFStructuralComponent *source_clip = arg;
610 source_clip->duration = avio_rb64(pb);
613 source_clip->start_position = avio_rb64(pb);
616 /* UMID, only get last 16 bytes */
618 avio_read(pb, source_clip->source_package_uid, 16);
621 source_clip->source_track_id = avio_rb32(pb);
627 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
629 MXFPackage *package = arg;
632 package->tracks_count = avio_rb32(pb);
633 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
634 if (!package->tracks_refs)
635 return AVERROR(ENOMEM);
636 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
637 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
643 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
645 MXFTimecodeComponent *mxf_timecode = arg;
648 mxf_timecode->start_frame = avio_rb64(pb);
651 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
654 mxf_timecode->drop_frame = avio_r8(pb);
660 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
662 MXFTrack *track = arg;
665 track->track_id = avio_rb32(pb);
668 avio_read(pb, track->track_number, 4);
671 track->edit_rate.num = avio_rb32(pb);
672 track->edit_rate.den = avio_rb32(pb);
675 avio_read(pb, track->sequence_ref, 16);
681 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
683 MXFSequence *sequence = arg;
686 sequence->duration = avio_rb64(pb);
689 avio_read(pb, sequence->data_definition_ul, 16);
692 sequence->structural_components_count = avio_rb32(pb);
693 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
694 if (!sequence->structural_components_refs)
695 return AVERROR(ENOMEM);
696 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
697 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
703 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
705 MXFPackage *package = arg;
708 package->tracks_count = avio_rb32(pb);
709 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
710 if (!package->tracks_refs)
711 return AVERROR(ENOMEM);
712 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
713 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
716 /* UMID, only get last 16 bytes */
718 avio_read(pb, package->package_uid, 16);
721 avio_read(pb, package->descriptor_ref, 16);
727 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
731 segment->nb_index_entries = avio_rb32(pb);
733 length = avio_rb32(pb);
735 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
736 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
737 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
738 return AVERROR(ENOMEM);
740 for (i = 0; i < segment->nb_index_entries; i++) {
741 segment->temporal_offset_entries[i] = avio_r8(pb);
742 avio_r8(pb); /* KeyFrameOffset */
743 segment->flag_entries[i] = avio_r8(pb);
744 segment->stream_offset_entries[i] = avio_rb64(pb);
745 avio_skip(pb, length - 11);
750 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
752 MXFIndexTableSegment *segment = arg;
755 segment->edit_unit_byte_count = avio_rb32(pb);
756 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
759 segment->index_sid = avio_rb32(pb);
760 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
763 segment->body_sid = avio_rb32(pb);
764 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
767 av_dlog(NULL, "IndexEntryArray found\n");
768 return mxf_read_index_entry_array(pb, segment);
770 segment->index_edit_rate.num = avio_rb32(pb);
771 segment->index_edit_rate.den = avio_rb32(pb);
772 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
773 segment->index_edit_rate.den);
776 segment->index_start_position = avio_rb64(pb);
777 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
780 segment->index_duration = avio_rb64(pb);
781 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
787 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
789 int code, value, ofs = 0;
790 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
795 av_dlog(NULL, "pixel layout: code %#x\n", code);
798 layout[ofs++] = code;
799 layout[ofs++] = value;
801 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
802 } while (code != 0); /* SMPTE 377M E.2.46 */
804 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
807 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
809 MXFDescriptor *descriptor = arg;
810 descriptor->pix_fmt = AV_PIX_FMT_NONE;
813 descriptor->sub_descriptors_count = avio_rb32(pb);
814 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
815 if (!descriptor->sub_descriptors_refs)
816 return AVERROR(ENOMEM);
817 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
818 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
821 avio_read(pb, descriptor->essence_container_ul, 16);
824 descriptor->linked_track_id = avio_rb32(pb);
826 case 0x3201: /* PictureEssenceCoding */
827 avio_read(pb, descriptor->essence_codec_ul, 16);
830 descriptor->width = avio_rb32(pb);
833 descriptor->height = avio_rb32(pb);
836 descriptor->frame_layout = avio_r8(pb);
839 descriptor->aspect_ratio.num = avio_rb32(pb);
840 descriptor->aspect_ratio.den = avio_rb32(pb);
843 descriptor->field_dominance = avio_r8(pb);
846 descriptor->component_depth = avio_rb32(pb);
849 descriptor->horiz_subsampling = avio_rb32(pb);
852 descriptor->vert_subsampling = avio_rb32(pb);
855 descriptor->sample_rate.num = avio_rb32(pb);
856 descriptor->sample_rate.den = avio_rb32(pb);
858 case 0x3D06: /* SoundEssenceCompression */
859 avio_read(pb, descriptor->essence_codec_ul, 16);
862 descriptor->channels = avio_rb32(pb);
865 descriptor->bits_per_sample = avio_rb32(pb);
868 mxf_read_pixel_layout(pb, descriptor);
871 /* Private uid used by SONY C0023S01.mxf */
872 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
873 if (descriptor->extradata)
874 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
875 av_free(descriptor->extradata);
876 descriptor->extradata_size = 0;
877 descriptor->extradata = av_malloc(size);
878 if (!descriptor->extradata)
879 return AVERROR(ENOMEM);
880 descriptor->extradata_size = size;
881 avio_read(pb, descriptor->extradata, size);
889 * Match an uid independently of the version byte and up to len common bytes
892 static int mxf_match_uid(const UID key, const UID uid, int len)
895 for (i = 0; i < len; i++) {
896 if (i != 7 && key[i] != uid[i])
902 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
904 while (uls->uid[0]) {
905 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
912 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
918 for (i = 0; i < mxf->metadata_sets_count; i++) {
919 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
920 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
921 return mxf->metadata_sets[i];
927 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
928 // video essence container uls
929 { { 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 */
930 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
931 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
932 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
935 /* EC ULs for intra-only formats */
936 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
937 { { 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 */
938 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
941 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
942 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
943 { { 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 */
944 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
947 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
948 // sound essence container uls
949 { { 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 */
950 { { 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 */
951 { { 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 */
952 { { 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 */
953 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
956 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
958 int i, j, nb_segments = 0;
959 MXFIndexTableSegment **unsorted_segments;
960 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
962 /* count number of segments, allocate arrays and copy unsorted segments */
963 for (i = 0; i < mxf->metadata_sets_count; i++)
964 if (mxf->metadata_sets[i]->type == IndexTableSegment)
968 return AVERROR_INVALIDDATA;
970 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
971 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
972 av_freep(sorted_segments);
973 av_free(unsorted_segments);
974 return AVERROR(ENOMEM);
977 for (i = j = 0; i < mxf->metadata_sets_count; i++)
978 if (mxf->metadata_sets[i]->type == IndexTableSegment)
979 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
981 *nb_sorted_segments = 0;
983 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
984 for (i = 0; i < nb_segments; i++) {
985 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
986 uint64_t best_index_duration = 0;
988 for (j = 0; j < nb_segments; j++) {
989 MXFIndexTableSegment *s = unsorted_segments[j];
991 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
992 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
993 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
995 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
996 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
997 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
999 best_body_sid = s->body_sid;
1000 best_index_sid = s->index_sid;
1001 best_index_start = s->index_start_position;
1002 best_index_duration = s->index_duration;
1006 /* no suitable entry found -> we're done */
1010 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1011 last_body_sid = best_body_sid;
1012 last_index_sid = best_index_sid;
1013 last_index_start = best_index_start;
1016 av_free(unsorted_segments);
1022 * Computes the absolute file offset of the given essence container offset
1024 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1027 int64_t offset_in = offset; /* for logging */
1029 for (x = 0; x < mxf->partitions_count; x++) {
1030 MXFPartition *p = &mxf->partitions[x];
1032 if (p->body_sid != body_sid)
1035 if (offset < p->essence_length || !p->essence_length) {
1036 *offset_out = p->essence_offset + offset;
1040 offset -= p->essence_length;
1043 av_log(mxf->fc, AV_LOG_ERROR,
1044 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1045 offset_in, body_sid);
1047 return AVERROR_INVALIDDATA;
1051 * Returns the end position of the essence container with given BodySID, or zero if unknown
1053 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1058 for (x = 0; x < mxf->partitions_count; x++) {
1059 MXFPartition *p = &mxf->partitions[x];
1061 if (p->body_sid != body_sid)
1064 if (!p->essence_length)
1067 ret = p->essence_offset + p->essence_length;
1073 /* EditUnit -> absolute offset */
1074 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)
1077 int64_t offset_temp = 0;
1079 for (i = 0; i < index_table->nb_segments; i++) {
1080 MXFIndexTableSegment *s = index_table->segments[i];
1082 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1084 if (edit_unit < s->index_start_position + s->index_duration) {
1085 int64_t index = edit_unit - s->index_start_position;
1087 if (s->edit_unit_byte_count)
1088 offset_temp += s->edit_unit_byte_count * index;
1089 else if (s->nb_index_entries) {
1090 if (s->nb_index_entries == 2 * s->index_duration + 1)
1091 index *= 2; /* Avid index */
1093 if (index < 0 || index >= s->nb_index_entries) {
1094 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1095 index_table->index_sid, s->index_start_position);
1096 return AVERROR_INVALIDDATA;
1099 offset_temp = s->stream_offset_entries[index];
1101 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1102 index_table->index_sid, s->index_start_position);
1103 return AVERROR_INVALIDDATA;
1107 *edit_unit_out = edit_unit;
1109 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1111 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1112 offset_temp += s->edit_unit_byte_count * s->index_duration;
1117 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);
1119 return AVERROR_INVALIDDATA;
1122 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1125 int8_t max_temporal_offset = -128;
1127 /* first compute how many entries we have */
1128 for (i = 0; i < index_table->nb_segments; i++) {
1129 MXFIndexTableSegment *s = index_table->segments[i];
1131 if (!s->nb_index_entries) {
1132 index_table->nb_ptses = 0;
1133 return 0; /* no TemporalOffsets */
1136 index_table->nb_ptses += s->index_duration;
1139 /* paranoid check */
1140 if (index_table->nb_ptses <= 0)
1143 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1144 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1145 av_freep(&index_table->ptses);
1146 return AVERROR(ENOMEM);
1149 /* we may have a few bad TemporalOffsets
1150 * make sure the corresponding PTSes don't have the bogus value 0 */
1151 for (x = 0; x < index_table->nb_ptses; x++)
1152 index_table->ptses[x] = AV_NOPTS_VALUE;
1166 * We want to transform it into this:
1177 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1178 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1179 * The latter makes DTS <= PTS.
1181 for (i = x = 0; i < index_table->nb_segments; i++) {
1182 MXFIndexTableSegment *s = index_table->segments[i];
1183 int index_delta = 1;
1184 int n = s->nb_index_entries;
1186 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1187 index_delta = 2; /* Avid index */
1188 /* ignore the last entry - it's the size of the essence container */
1192 for (j = 0; j < n; j += index_delta, x++) {
1193 int offset = s->temporal_offset_entries[j] / index_delta;
1194 int index = x + offset;
1196 if (x >= index_table->nb_ptses) {
1197 av_log(mxf->fc, AV_LOG_ERROR,
1198 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1199 s->nb_index_entries, s->index_duration);
1203 index_table->fake_index[x].timestamp = x;
1204 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1206 if (index < 0 || index >= index_table->nb_ptses) {
1207 av_log(mxf->fc, AV_LOG_ERROR,
1208 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1213 index_table->ptses[index] = x;
1214 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1218 index_table->first_dts = -max_temporal_offset;
1224 * Sorts and collects index table segments into index tables.
1225 * Also computes PTSes if possible.
1227 static int mxf_compute_index_tables(MXFContext *mxf)
1229 int i, j, k, ret, nb_sorted_segments;
1230 MXFIndexTableSegment **sorted_segments = NULL;
1232 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1233 nb_sorted_segments <= 0) {
1234 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1238 /* sanity check and count unique BodySIDs/IndexSIDs */
1239 for (i = 0; i < nb_sorted_segments; i++) {
1240 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1241 mxf->nb_index_tables++;
1242 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1243 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1244 ret = AVERROR_INVALIDDATA;
1245 goto finish_decoding_index;
1249 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1250 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1251 ret = AVERROR(ENOMEM);
1252 goto finish_decoding_index;
1255 /* distribute sorted segments to index tables */
1256 for (i = j = 0; i < nb_sorted_segments; i++) {
1257 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1262 mxf->index_tables[j].nb_segments++;
1265 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1266 MXFIndexTable *t = &mxf->index_tables[j];
1268 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1269 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1270 ret = AVERROR(ENOMEM);
1271 goto finish_decoding_index;
1274 if (sorted_segments[i]->index_start_position)
1275 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1276 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1278 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1279 t->index_sid = sorted_segments[i]->index_sid;
1280 t->body_sid = sorted_segments[i]->body_sid;
1282 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1283 goto finish_decoding_index;
1285 /* fix zero IndexDurations */
1286 for (k = 0; k < t->nb_segments; k++) {
1287 if (t->segments[k]->index_duration)
1290 if (t->nb_segments > 1)
1291 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1294 if (mxf->fc->nb_streams <= 0) {
1295 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1299 /* assume the first stream's duration is reasonable
1300 * leave index_duration = 0 on further segments in case we have any (unlikely)
1302 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1308 finish_decoding_index:
1309 av_free(sorted_segments);
1313 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1315 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1316 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1317 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1318 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1321 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1323 char buf[AV_TIMECODE_STR_SIZE];
1324 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1329 static int mxf_parse_structural_metadata(MXFContext *mxf)
1331 MXFPackage *material_package = NULL;
1332 MXFPackage *temp_package = NULL;
1335 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1336 /* TODO: handle multiple material packages (OP3x) */
1337 for (i = 0; i < mxf->packages_count; i++) {
1338 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1339 if (material_package) break;
1341 if (!material_package) {
1342 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1343 return AVERROR_INVALIDDATA;
1346 for (i = 0; i < material_package->tracks_count; i++) {
1347 MXFPackage *source_package = NULL;
1348 MXFTrack *material_track = NULL;
1349 MXFTrack *source_track = NULL;
1350 MXFTrack *temp_track = NULL;
1351 MXFDescriptor *descriptor = NULL;
1352 MXFStructuralComponent *component = NULL;
1353 MXFTimecodeComponent *mxf_tc = NULL;
1354 UID *essence_container_ul = NULL;
1355 const MXFCodecUL *codec_ul = NULL;
1356 const MXFCodecUL *container_ul = NULL;
1357 const MXFCodecUL *pix_fmt_ul = NULL;
1362 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1363 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1367 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1368 mxf_tc = (MXFTimecodeComponent*)component;
1369 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1370 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1371 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1375 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1376 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1380 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1381 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1385 mxf_tc = (MXFTimecodeComponent*)component;
1386 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1387 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1388 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1393 /* TODO: handle multiple source clips */
1394 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1395 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1399 for (k = 0; k < mxf->packages_count; k++) {
1400 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1403 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1404 source_package = temp_package;
1408 if (!source_package) {
1409 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1412 for (k = 0; k < source_package->tracks_count; k++) {
1413 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1414 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1415 ret = AVERROR_INVALIDDATA;
1418 if (temp_track->track_id == component->source_track_id) {
1419 source_track = temp_track;
1423 if (!source_track) {
1424 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1428 if (!source_track || !component)
1431 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1432 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1433 ret = AVERROR_INVALIDDATA;
1437 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1438 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1439 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1440 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1444 st = avformat_new_stream(mxf->fc, NULL);
1446 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1447 ret = AVERROR(ENOMEM);
1450 st->id = source_track->track_id;
1451 st->priv_data = source_track;
1452 source_track->original_duration = st->duration = component->duration;
1453 if (st->duration == -1)
1454 st->duration = AV_NOPTS_VALUE;
1455 st->start_time = component->start_position;
1456 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1457 av_log(mxf->fc, AV_LOG_WARNING,
1458 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1459 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1460 material_track->edit_rate = (AVRational){25, 1};
1462 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1464 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1465 source_track->edit_rate = material_track->edit_rate;
1467 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1468 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1469 st->codec->codec_type = codec_ul->id;
1471 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1472 if (source_package->descriptor) {
1473 if (source_package->descriptor->type == MultipleDescriptor) {
1474 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1475 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1477 if (!sub_descriptor) {
1478 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1481 if (sub_descriptor->linked_track_id == source_track->track_id) {
1482 descriptor = sub_descriptor;
1486 } else if (source_package->descriptor->type == Descriptor)
1487 descriptor = source_package->descriptor;
1490 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1493 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1494 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1495 essence_container_ul = &descriptor->essence_container_ul;
1496 /* HACK: replacing the original key with mxf_encrypted_essence_container
1497 * is not allowed according to s429-6, try to find correct information anyway */
1498 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1499 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1500 for (k = 0; k < mxf->metadata_sets_count; k++) {
1501 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1502 if (metadata->type == CryptoContext) {
1503 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1509 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1510 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1511 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1512 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1513 avcodec_get_name(st->codec->codec_id));
1514 for (k = 0; k < 16; k++) {
1515 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1516 descriptor->essence_codec_ul[k]);
1517 if (!(k+1 & 19) || k == 5)
1518 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1520 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1521 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1522 source_track->intra_only = mxf_is_intra_only(descriptor);
1523 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1524 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1525 st->codec->codec_id = container_ul->id;
1526 st->codec->width = descriptor->width;
1527 st->codec->height = descriptor->height; /* Field height, not frame height */
1528 switch (descriptor->frame_layout) {
1529 case SegmentedFrame:
1530 /* This one is a weird layout I don't fully understand. */
1531 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1534 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1537 /* Every other line is stored and needs to be duplicated. */
1538 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1539 break; /* The correct thing to do here is fall through, but by breaking we might be
1540 able to decode some streams at half the vertical resolution, rather than not al all.
1541 It's also for compatibility with the old behavior. */
1544 case SeparateFields:
1545 st->codec->height *= 2; /* Turn field height into frame height. */
1548 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1550 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1551 st->codec->pix_fmt = descriptor->pix_fmt;
1552 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1553 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1554 &descriptor->essence_codec_ul);
1555 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1556 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1557 /* support files created before RP224v10 by defaulting to UYVY422
1558 if subsampling is 4:2:2 and component depth is 8-bit */
1559 if (descriptor->horiz_subsampling == 2 &&
1560 descriptor->vert_subsampling == 1 &&
1561 descriptor->component_depth == 8) {
1562 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1567 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1568 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1569 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1570 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1571 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))
1572 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1573 st->codec->channels = descriptor->channels;
1574 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1576 if (descriptor->sample_rate.den > 0) {
1577 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1578 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1580 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) found for stream #%d, time base forced to 1/48000\n",
1581 descriptor->sample_rate.num, descriptor->sample_rate.den, st->index);
1582 avpriv_set_pts_info(st, 64, 1, 48000);
1585 /* if duration is set, rescale it from EditRate to SampleRate */
1586 if (st->duration != AV_NOPTS_VALUE)
1587 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1589 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1590 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1591 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1592 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1593 else if (descriptor->bits_per_sample == 32)
1594 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1595 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1596 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1597 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1598 else if (descriptor->bits_per_sample == 32)
1599 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1600 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1601 st->need_parsing = AVSTREAM_PARSE_FULL;
1604 if (descriptor->extradata) {
1605 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1606 if (st->codec->extradata)
1607 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1608 } else if(st->codec->codec_id == AV_CODEC_ID_H264) {
1609 ff_generate_avci_extradata(st);
1611 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1612 /* TODO: decode timestamps */
1613 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1622 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1628 return AVERROR(EINVAL);
1630 buf_size = size + size/2 + 1;
1631 *str = av_malloc(buf_size);
1633 return AVERROR(ENOMEM);
1635 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1643 static int mxf_uid_to_str(UID uid, char **str)
1647 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1649 return AVERROR(ENOMEM);
1650 for (i = 0; i < sizeof(UID); i++) {
1651 snprintf(p, 2 + 1, "%.2x", uid[i]);
1653 if (i == 3 || i == 5 || i == 7 || i == 9) {
1654 snprintf(p, 1 + 1, "-");
1661 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1663 struct tm time = {0};
1664 time.tm_year = (timestamp >> 48) - 1900;
1665 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1666 time.tm_mday = (timestamp >> 32 & 0xFF);
1667 time.tm_hour = (timestamp >> 24 & 0xFF);
1668 time.tm_min = (timestamp >> 16 & 0xFF);
1669 time.tm_sec = (timestamp >> 8 & 0xFF);
1671 /* ensure month/day are valid */
1672 time.tm_mon = FFMAX(time.tm_mon, 0);
1673 time.tm_mday = FFMAX(time.tm_mday, 1);
1675 *str = av_mallocz(32);
1677 return AVERROR(ENOMEM);
1678 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1683 #define SET_STR_METADATA(pb, name, str) do { \
1684 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1686 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1689 #define SET_UID_METADATA(pb, name, var, str) do { \
1690 avio_read(pb, var, 16); \
1691 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1693 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1696 #define SET_TS_METADATA(pb, name, var, str) do { \
1697 var = avio_rb64(pb); \
1698 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1700 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1703 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1705 MXFContext *mxf = arg;
1706 AVFormatContext *s = mxf->fc;
1713 SET_STR_METADATA(pb, "company_name", str);
1716 SET_STR_METADATA(pb, "product_name", str);
1719 SET_STR_METADATA(pb, "product_version", str);
1722 SET_UID_METADATA(pb, "product_uid", uid, str);
1725 SET_TS_METADATA(pb, "modification_date", ts, str);
1728 SET_STR_METADATA(pb, "application_platform", str);
1731 SET_UID_METADATA(pb, "generation_uid", uid, str);
1734 SET_UID_METADATA(pb, "uid", uid, str);
1740 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1759 { { 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 */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1762 { { 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 */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1766 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1767 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1768 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1769 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1770 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1773 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1775 AVIOContext *pb = mxf->fc->pb;
1776 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1777 uint64_t klv_end = avio_tell(pb) + klv->length;
1780 return AVERROR(ENOMEM);
1781 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1783 int tag = avio_rb16(pb);
1784 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1785 uint64_t next = avio_tell(pb) + size;
1788 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1789 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1790 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1793 if (tag > 0x7FFF) { /* dynamic tag */
1795 for (i = 0; i < mxf->local_tags_count; i++) {
1796 int local_tag = AV_RB16(mxf->local_tags+i*18);
1797 if (local_tag == tag) {
1798 memcpy(uid, mxf->local_tags+i*18+2, 16);
1799 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1800 PRINT_KEY(mxf->fc, "uid", uid);
1804 if (ctx_size && tag == 0x3C0A)
1805 avio_read(pb, ctx->uid, 16);
1806 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1809 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1810 * it extending past the end of the KLV though (zzuf5.mxf). */
1811 if (avio_tell(pb) > klv_end) {
1815 av_log(mxf->fc, AV_LOG_ERROR,
1816 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1818 return AVERROR_INVALIDDATA;
1819 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1820 avio_seek(pb, next, SEEK_SET);
1822 if (ctx_size) ctx->type = type;
1823 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1827 * Seeks to the previous partition, if possible
1828 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1830 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1832 AVIOContext *pb = mxf->fc->pb;
1834 if (!mxf->current_partition ||
1835 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1836 return 0; /* we've parsed all partitions */
1838 /* seek to previous partition */
1839 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1840 mxf->current_partition = NULL;
1842 av_dlog(mxf->fc, "seeking to previous partition\n");
1848 * Called when essence is encountered
1849 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1851 static int mxf_parse_handle_essence(MXFContext *mxf)
1853 AVIOContext *pb = mxf->fc->pb;
1856 if (mxf->parsing_backward) {
1857 return mxf_seek_to_previous_partition(mxf);
1859 if (!mxf->footer_partition) {
1860 av_dlog(mxf->fc, "no footer\n");
1864 av_dlog(mxf->fc, "seeking to footer\n");
1866 /* remember where we were so we don't end up seeking further back than this */
1867 mxf->last_forward_tell = avio_tell(pb);
1869 if (!pb->seekable) {
1870 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1874 /* seek to footer partition and parse backward */
1875 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1876 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1877 mxf->run_in + mxf->footer_partition, ret);
1881 mxf->current_partition = NULL;
1882 mxf->parsing_backward = 1;
1889 * Called when the next partition or EOF is encountered
1890 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1892 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1894 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1898 * Figures out the proper offset and length of the essence container in each partition
1900 static void mxf_compute_essence_containers(MXFContext *mxf)
1904 /* everything is already correct */
1905 if (mxf->op == OPAtom)
1908 for (x = 0; x < mxf->partitions_count; x++) {
1909 MXFPartition *p = &mxf->partitions[x];
1912 continue; /* BodySID == 0 -> no essence */
1914 if (x >= mxf->partitions_count - 1)
1915 break; /* last partition - can't compute length (and we don't need to) */
1917 /* essence container spans to the next partition */
1918 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1920 if (p->essence_length < 0) {
1921 /* next ThisPartition < essence_offset */
1922 p->essence_length = 0;
1923 av_log(mxf->fc, AV_LOG_ERROR,
1924 "partition %i: bad ThisPartition = %"PRIX64"\n",
1925 x+1, mxf->partitions[x+1].this_partition);
1930 static int64_t round_to_kag(int64_t position, int kag_size)
1932 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1933 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1934 int64_t ret = (position / kag_size) * kag_size;
1935 return ret == position ? ret : ret + kag_size;
1938 static int is_pcm(enum AVCodecID codec_id)
1940 /* we only care about "normal" PCM codecs until we get samples */
1941 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1945 * Deal with the case where for some audio atoms EditUnitByteCount is
1946 * very small (2, 4..). In those cases we should read more than one
1947 * sample per call to mxf_read_packet().
1949 static void mxf_handle_small_eubc(AVFormatContext *s)
1951 MXFContext *mxf = s->priv_data;
1953 /* assuming non-OPAtom == frame wrapped
1954 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1955 if (mxf->op != OPAtom)
1958 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1959 if (s->nb_streams != 1 ||
1960 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1961 !is_pcm(s->streams[0]->codec->codec_id) ||
1962 mxf->nb_index_tables != 1 ||
1963 mxf->index_tables[0].nb_segments != 1 ||
1964 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1967 /* arbitrarily default to 48 kHz PAL audio frame size */
1968 /* TODO: We could compute this from the ratio between the audio
1969 * and video edit rates for 48 kHz NTSC we could use the
1970 * 1802-1802-1802-1802-1801 pattern. */
1971 mxf->edit_units_per_packet = 1920;
1974 static int mxf_read_header(AVFormatContext *s)
1976 MXFContext *mxf = s->priv_data;
1978 int64_t essence_offset = 0;
1981 mxf->last_forward_tell = INT64_MAX;
1982 mxf->edit_units_per_packet = 1;
1984 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1985 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1986 return AVERROR_INVALIDDATA;
1988 avio_seek(s->pb, -14, SEEK_CUR);
1990 mxf->run_in = avio_tell(s->pb);
1992 while (!url_feof(s->pb)) {
1993 const MXFMetadataReadTableEntry *metadata;
1995 if (klv_read_packet(&klv, s->pb) < 0) {
1996 /* EOF - seek to previous partition or stop */
1997 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2003 PRINT_KEY(s, "read header", klv.key);
2004 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2005 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2006 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2007 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2008 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2010 if (!mxf->current_partition) {
2011 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2012 return AVERROR_INVALIDDATA;
2015 if (!mxf->current_partition->essence_offset) {
2016 /* for OP1a we compute essence_offset
2017 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2018 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2019 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2021 int64_t op1a_essence_offset =
2022 round_to_kag(mxf->current_partition->this_partition +
2023 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2024 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2025 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2027 if (mxf->op == OPAtom) {
2028 /* point essence_offset to the actual data
2029 * OPAtom has all the essence in one big KLV
2031 mxf->current_partition->essence_offset = avio_tell(s->pb);
2032 mxf->current_partition->essence_length = klv.length;
2034 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2035 mxf->current_partition->essence_offset = op1a_essence_offset;
2039 if (!essence_offset)
2040 essence_offset = klv.offset;
2042 /* seek to footer, previous partition or stop */
2043 if (mxf_parse_handle_essence(mxf) <= 0)
2046 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2047 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2048 /* next partition pack - keep going, seek to previous partition or stop */
2049 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2051 else if (mxf->parsing_backward)
2053 /* we're still parsing forward. proceed to parsing this partition pack */
2056 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2057 if (IS_KLV_KEY(klv.key, metadata->key)) {
2059 if (klv.key[5] == 0x53) {
2060 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2062 uint64_t next = avio_tell(s->pb) + klv.length;
2063 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2065 /* only seek forward, else this can loop for a long time */
2066 if (avio_tell(s->pb) > next) {
2067 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2069 return AVERROR_INVALIDDATA;
2072 avio_seek(s->pb, next, SEEK_SET);
2075 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2081 if (!metadata->read)
2082 avio_skip(s->pb, klv.length);
2084 /* FIXME avoid seek */
2085 if (!essence_offset) {
2086 av_log(s, AV_LOG_ERROR, "no essence\n");
2087 return AVERROR_INVALIDDATA;
2089 avio_seek(s->pb, essence_offset, SEEK_SET);
2091 mxf_compute_essence_containers(mxf);
2093 /* we need to do this before computing the index tables
2094 * to be able to fill in zero IndexDurations with st->duration */
2095 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2098 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2101 if (mxf->nb_index_tables > 1) {
2102 /* TODO: look up which IndexSID to use via EssenceContainerData */
2103 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2104 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2105 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2106 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2107 ret = AVERROR_INVALIDDATA;
2111 mxf_handle_small_eubc(s);
2121 * Sets mxf->current_edit_unit based on what offset we're currently at.
2122 * @return next_ofs if OK, <0 on error
2124 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2126 int64_t last_ofs = -1, next_ofs = -1;
2127 MXFIndexTable *t = &mxf->index_tables[0];
2129 /* this is called from the OP1a demuxing logic, which means there
2130 * may be no index tables */
2131 if (mxf->nb_index_tables <= 0)
2134 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2135 while (mxf->current_edit_unit >= 0) {
2136 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2139 if (next_ofs <= last_ofs) {
2140 /* large next_ofs didn't change or current_edit_unit wrapped
2141 * around this fixes the infinite loop on zzuf3.mxf */
2142 av_log(mxf->fc, AV_LOG_ERROR,
2143 "next_ofs didn't change. not deriving packet timestamps\n");
2147 if (next_ofs > current_offset)
2150 last_ofs = next_ofs;
2151 mxf->current_edit_unit++;
2154 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2155 if (mxf->current_edit_unit < 0)
2161 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2163 int i, total = 0, size = 0;
2164 AVStream *st = mxf->fc->streams[stream_index];
2165 MXFTrack *track = st->priv_data;
2166 AVRational time_base = av_inv_q(track->edit_rate);
2167 AVRational sample_rate = av_inv_q(st->time_base);
2168 const MXFSamplesPerFrame *spf = NULL;
2170 if ((sample_rate.num / sample_rate.den) == 48000)
2171 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2173 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2174 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2175 av_mul_q(sample_rate, time_base)));
2177 av_log(mxf->fc, AV_LOG_WARNING,
2178 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2179 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2183 while (spf->samples_per_frame[size]) {
2184 total += spf->samples_per_frame[size];
2190 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2191 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2192 *sample_count += spf->samples_per_frame[i];
2198 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2200 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2201 pkt->pts = track->sample_count;
2202 if (codec->channels <= 0 || av_get_bits_per_sample(codec->codec_id) <= 0)
2203 return AVERROR(EINVAL);
2204 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2208 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2211 MXFContext *mxf = s->priv_data;
2213 while (!url_feof(s->pb)) {
2215 if (klv_read_packet(&klv, s->pb) < 0)
2217 PRINT_KEY(s, "read packet", klv.key);
2218 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2219 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2220 ret = mxf_decrypt_triplet(s, pkt, &klv);
2222 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2223 return AVERROR_INVALIDDATA;
2227 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2228 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2229 int index = mxf_get_stream_index(s, &klv);
2230 int64_t next_ofs, next_klv;
2233 AVCodecContext *codec;
2236 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2240 st = s->streams[index];
2241 track = st->priv_data;
2243 if (s->streams[index]->discard == AVDISCARD_ALL)
2246 next_klv = avio_tell(s->pb) + klv.length;
2247 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2249 if (next_ofs >= 0 && next_klv > next_ofs) {
2250 /* if this check is hit then it's possible OPAtom was treated as OP1a
2251 * truncate the packet since it's probably very large (>2 GiB is common) */
2252 avpriv_request_sample(s,
2253 "OPAtom misinterpreted as OP1a?"
2254 "KLV for edit unit %i extending into "
2256 mxf->current_edit_unit);
2257 klv.length = next_ofs - avio_tell(s->pb);
2260 /* check for 8 channels AES3 element */
2261 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2262 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2263 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2264 return AVERROR_INVALIDDATA;
2267 ret = av_get_packet(s->pb, pkt, klv.length);
2271 pkt->stream_index = index;
2272 pkt->pos = klv.offset;
2274 codec = s->streams[index]->codec;
2275 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2276 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2277 MXFIndexTable *t = &mxf->index_tables[0];
2279 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2280 pkt->dts = mxf->current_edit_unit + t->first_dts;
2281 pkt->pts = t->ptses[mxf->current_edit_unit];
2282 } else if (track->intra_only) {
2283 /* intra-only -> PTS = EditUnit.
2284 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2285 pkt->pts = mxf->current_edit_unit;
2287 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2288 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2293 /* seek for truncated packets */
2294 avio_seek(s->pb, next_klv, SEEK_SET);
2299 avio_skip(s->pb, klv.length);
2304 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2306 MXFContext *mxf = s->priv_data;
2308 int64_t ret64, pos, next_pos;
2313 if (mxf->op != OPAtom)
2314 return mxf_read_packet_old(s, pkt);
2316 /* OPAtom - clip wrapped demuxing */
2317 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2319 t = &mxf->index_tables[0];
2321 if (mxf->current_edit_unit >= st->duration)
2324 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2326 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2329 /* compute size by finding the next edit unit or the end of the essence container
2330 * not pretty, but it works */
2331 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2332 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2333 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2334 return AVERROR_INVALIDDATA;
2337 if ((size = next_pos - pos) <= 0) {
2338 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2339 return AVERROR_INVALIDDATA;
2342 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2345 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2348 pkt->stream_index = 0;
2350 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2351 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2352 pkt->dts = mxf->current_edit_unit + t->first_dts;
2353 pkt->pts = t->ptses[mxf->current_edit_unit];
2354 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2355 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2360 mxf->current_edit_unit += edit_units;
2365 static int mxf_read_close(AVFormatContext *s)
2367 MXFContext *mxf = s->priv_data;
2368 MXFIndexTableSegment *seg;
2371 av_freep(&mxf->packages_refs);
2373 for (i = 0; i < s->nb_streams; i++)
2374 s->streams[i]->priv_data = NULL;
2376 for (i = 0; i < mxf->metadata_sets_count; i++) {
2377 switch (mxf->metadata_sets[i]->type) {
2379 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2381 case MultipleDescriptor:
2382 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2385 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2388 case MaterialPackage:
2389 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2391 case IndexTableSegment:
2392 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2393 av_freep(&seg->temporal_offset_entries);
2394 av_freep(&seg->flag_entries);
2395 av_freep(&seg->stream_offset_entries);
2400 av_freep(&mxf->metadata_sets[i]);
2402 av_freep(&mxf->partitions);
2403 av_freep(&mxf->metadata_sets);
2404 av_freep(&mxf->aesc);
2405 av_freep(&mxf->local_tags);
2407 if (mxf->index_tables) {
2408 for (i = 0; i < mxf->nb_index_tables; i++) {
2409 av_freep(&mxf->index_tables[i].segments);
2410 av_freep(&mxf->index_tables[i].ptses);
2411 av_freep(&mxf->index_tables[i].fake_index);
2414 av_freep(&mxf->index_tables);
2419 static int mxf_probe(AVProbeData *p) {
2420 const uint8_t *bufp = p->buf;
2421 const uint8_t *end = p->buf + p->buf_size;
2423 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2426 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2427 end -= sizeof(mxf_header_partition_pack_key);
2428 for (; bufp < end; bufp++) {
2429 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2430 return AVPROBE_SCORE_MAX;
2435 /* rudimentary byte seek */
2436 /* XXX: use MXF Index */
2437 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2439 AVStream *st = s->streams[stream_index];
2441 MXFContext* mxf = s->priv_data;
2446 MXFTrack *source_track = st->priv_data;
2448 /* if audio then truncate sample_time to EditRate */
2449 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2450 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2452 if (mxf->nb_index_tables <= 0) {
2454 return AVERROR_INVALIDDATA;
2455 if (sample_time < 0)
2457 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2459 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2461 ff_update_cur_dts(s, st, sample_time);
2462 mxf->current_edit_unit = sample_time;
2464 t = &mxf->index_tables[0];
2466 /* clamp above zero, else ff_index_search_timestamp() returns negative
2467 * this also means we allow seeking before the start */
2468 sample_time = FFMAX(sample_time, 0);
2470 if (t->fake_index) {
2471 /* behave as if we have a proper index */
2472 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2475 /* no IndexEntryArray (one or more CBR segments)
2476 * make sure we don't seek past the end */
2477 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2480 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2483 ff_update_cur_dts(s, st, sample_time);
2484 mxf->current_edit_unit = sample_time;
2485 avio_seek(s->pb, seekpos, SEEK_SET);
2488 // Update all tracks sample count
2489 for (i = 0; i < s->nb_streams; i++) {
2490 AVStream *cur_st = s->streams[i];
2491 MXFTrack *cur_track = cur_st->priv_data;
2492 uint64_t current_sample_count = 0;
2493 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2494 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2498 cur_track->sample_count = current_sample_count;
2504 AVInputFormat ff_mxf_demuxer = {
2506 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2507 .priv_data_size = sizeof(MXFContext),
2508 .read_probe = mxf_probe,
2509 .read_header = mxf_read_header,
2510 .read_packet = mxf_read_packet,
2511 .read_close = mxf_read_close,
2512 .read_seek = mxf_read_seek,