3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
72 OPSonyOpt, /* FATE sample, violates the spec in places */
78 MXFPartitionType type;
79 uint64_t previous_partition;
82 int64_t this_partition;
83 int64_t essence_offset; ///< absolute offset of essence
84 int64_t essence_length;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
103 int64_t start_position;
105 } MXFStructuralComponent;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
118 enum MXFMetadataSetType type;
119 MXFSequence *sequence; /* mandatory, and only one */
122 uint8_t track_number[4];
123 AVRational edit_rate;
125 uint64_t sample_count;
126 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
131 enum MXFMetadataSetType type;
132 UID essence_container_ul;
133 UID essence_codec_ul;
134 AVRational sample_rate;
135 AVRational aspect_ratio;
137 int height; /* Field height, not frame height */
138 int frame_layout; /* See MXFFrameLayout enum */
144 unsigned int component_depth;
145 unsigned int horiz_subsampling;
146 unsigned int vert_subsampling;
147 UID *sub_descriptors_refs;
148 int sub_descriptors_count;
152 enum AVPixelFormat pix_fmt;
157 enum MXFMetadataSetType type;
158 int edit_unit_byte_count;
161 AVRational index_edit_rate;
162 uint64_t index_start_position;
163 uint64_t index_duration;
164 int8_t *temporal_offset_entries;
166 uint64_t *stream_offset_entries;
167 int nb_index_entries;
168 } MXFIndexTableSegment;
172 enum MXFMetadataSetType type;
176 MXFDescriptor *descriptor; /* only one */
182 enum MXFMetadataSetType type;
185 /* decoded index table */
189 int nb_ptses; /* number of PTSes or total duration of index */
190 int64_t first_dts; /* DTS = EditUnit + first_dts */
191 int64_t *ptses; /* maps EditUnit -> PTS */
193 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
194 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
198 MXFPartition *partitions;
199 unsigned partitions_count;
203 MXFMetadataSet **metadata_sets;
204 int metadata_sets_count;
208 int local_tags_count;
209 uint64_t last_partition;
210 uint64_t footer_partition;
211 KLVPacket current_klv_data;
212 int current_klv_index;
214 MXFPartition *current_partition;
215 int parsing_backward;
216 int64_t last_forward_tell;
217 int last_forward_partition;
218 int current_edit_unit;
220 MXFIndexTable *index_tables;
221 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
224 enum MXFWrappingScheme {
229 /* NOTE: klv_offset is not set (-1) for local keys */
230 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
234 MXFMetadataReadFunc *read;
236 enum MXFMetadataSetType type;
237 } MXFMetadataReadTableEntry;
239 /* partial keys to match */
240 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
241 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
242 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
243 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
244 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
245 /* complete keys to match */
246 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 };
247 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
248 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
249 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
250 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
252 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
254 static int64_t klv_decode_ber_length(AVIOContext *pb)
256 uint64_t size = avio_r8(pb);
257 if (size & 0x80) { /* long form */
258 int bytes_num = size & 0x7f;
259 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
261 return AVERROR_INVALIDDATA;
264 size = size << 8 | avio_r8(pb);
269 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
272 for (i = 0; i < size && !pb->eof_reached; i++) {
276 else if (b != key[i])
282 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
284 if (!mxf_read_sync(pb, mxf_klv_key, 4))
285 return AVERROR_INVALIDDATA;
286 klv->offset = avio_tell(pb) - 4;
287 memcpy(klv->key, mxf_klv_key, 4);
288 avio_read(pb, klv->key + 4, 12);
289 klv->length = klv_decode_ber_length(pb);
290 return klv->length == -1 ? -1 : 0;
293 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
297 for (i = 0; i < s->nb_streams; i++) {
298 MXFTrack *track = s->streams[i]->priv_data;
300 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
303 /* return 0 if only one stream, for OP Atom files with 0 as track number */
304 return s->nb_streams == 1 ? 0 : -1;
307 /* XXX: use AVBitStreamFilter */
308 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
310 const uint8_t *buf_ptr, *end_ptr;
314 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
315 return AVERROR_INVALIDDATA;
316 length = av_get_packet(pb, pkt, length);
319 data_ptr = pkt->data;
320 end_ptr = pkt->data + length;
321 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
322 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
323 for (i = 0; i < st->codec->channels; i++) {
324 uint32_t sample = bytestream_get_le32(&buf_ptr);
325 if (st->codec->bits_per_coded_sample == 24)
326 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
328 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
330 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
332 av_shrink_packet(pkt, data_ptr - pkt->data);
336 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
338 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
339 MXFContext *mxf = s->priv_data;
340 AVIOContext *pb = s->pb;
341 int64_t end = avio_tell(pb) + klv->length;
344 uint64_t plaintext_size;
349 if (!mxf->aesc && s->key && s->keylen == 16) {
350 mxf->aesc = av_aes_alloc();
352 return AVERROR(ENOMEM);
353 av_aes_init(mxf->aesc, s->key, 128, 1);
356 avio_skip(pb, klv_decode_ber_length(pb));
358 klv_decode_ber_length(pb);
359 plaintext_size = avio_rb64(pb);
361 klv_decode_ber_length(pb);
362 avio_read(pb, klv->key, 16);
363 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
364 return AVERROR_INVALIDDATA;
365 index = mxf_get_stream_index(s, klv);
367 return AVERROR_INVALIDDATA;
369 klv_decode_ber_length(pb);
370 orig_size = avio_rb64(pb);
371 if (orig_size < plaintext_size)
372 return AVERROR_INVALIDDATA;
374 size = klv_decode_ber_length(pb);
375 if (size < 32 || size - 32 < orig_size)
376 return AVERROR_INVALIDDATA;
377 avio_read(pb, ivec, 16);
378 avio_read(pb, tmpbuf, 16);
380 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
381 if (memcmp(tmpbuf, checkv, 16))
382 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
384 size = av_get_packet(pb, pkt, size);
387 else if (size < plaintext_size)
388 return AVERROR_INVALIDDATA;
389 size -= plaintext_size;
391 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
392 &pkt->data[plaintext_size], size >> 4, ivec, 1);
393 av_shrink_packet(pkt, orig_size);
394 pkt->stream_index = index;
395 avio_skip(pb, end - avio_tell(pb));
399 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
401 MXFContext *mxf = arg;
402 int item_num = avio_rb32(pb);
403 int item_len = avio_rb32(pb);
405 if (item_len != 18) {
406 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
407 return AVERROR_PATCHWELCOME;
409 if (item_num > UINT_MAX / item_len)
410 return AVERROR_INVALIDDATA;
411 mxf->local_tags_count = item_num;
412 mxf->local_tags = av_malloc(item_num*item_len);
413 if (!mxf->local_tags)
414 return AVERROR(ENOMEM);
415 avio_read(pb, mxf->local_tags, item_num*item_len);
419 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
421 MXFContext *mxf = arg;
422 MXFPartition *partition;
424 uint64_t footer_partition;
425 uint32_t nb_essence_containers;
428 if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
429 sizeof(*mxf->partitions))) < 0) {
430 mxf->partitions_count = 0;
434 if (mxf->parsing_backward) {
435 /* insert the new partition pack in the middle
436 * this makes the entries in mxf->partitions sorted by offset */
437 memmove(&mxf->partitions[mxf->last_forward_partition+1],
438 &mxf->partitions[mxf->last_forward_partition],
439 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
440 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
442 mxf->last_forward_partition++;
443 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
446 memset(partition, 0, sizeof(*partition));
447 mxf->partitions_count++;
448 partition->pack_length = avio_tell(pb) - klv_offset + size;
452 partition->type = Header;
455 partition->type = BodyPartition;
458 partition->type = Footer;
461 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
462 return AVERROR_INVALIDDATA;
465 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
466 partition->closed = partition->type == Footer || !(uid[14] & 1);
467 partition->complete = uid[14] > 2;
469 partition->kag_size = avio_rb32(pb);
470 partition->this_partition = avio_rb64(pb);
471 partition->previous_partition = avio_rb64(pb);
472 footer_partition = avio_rb64(pb);
473 partition->header_byte_count = avio_rb64(pb);
474 partition->index_byte_count = avio_rb64(pb);
475 partition->index_sid = avio_rb32(pb);
477 partition->body_sid = avio_rb32(pb);
478 avio_read(pb, op, sizeof(UID));
479 nb_essence_containers = avio_rb32(pb);
481 /* some files don'thave FooterPartition set in every partition */
482 if (footer_partition) {
483 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
484 av_log(mxf->fc, AV_LOG_ERROR,
485 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
486 mxf->footer_partition, footer_partition);
488 mxf->footer_partition = footer_partition;
493 "PartitionPack: ThisPartition = 0x%"PRIX64
494 ", PreviousPartition = 0x%"PRIX64", "
495 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
496 partition->this_partition,
497 partition->previous_partition, footer_partition,
498 partition->index_sid, partition->body_sid);
500 /* sanity check PreviousPartition if set */
501 if (partition->previous_partition &&
502 mxf->run_in + partition->previous_partition >= klv_offset) {
503 av_log(mxf->fc, AV_LOG_ERROR,
504 "PreviousPartition points to this partition or forward\n");
505 return AVERROR_INVALIDDATA;
508 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
509 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
510 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
511 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
512 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
513 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
514 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
515 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
516 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
517 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
518 else if (op[12] == 0x10) {
519 /* SMPTE 390m: "There shall be exactly one essence container"
520 * The following block deals with files that violate this, namely:
521 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
522 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
523 if (nb_essence_containers != 1) {
524 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
528 av_log(mxf->fc, AV_LOG_WARNING,
529 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
530 nb_essence_containers,
531 op == OP1a ? "OP1a" : "OPAtom");
537 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
541 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
542 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
543 partition->kag_size);
545 if (mxf->op == OPSonyOpt)
546 partition->kag_size = 512;
548 partition->kag_size = 1;
550 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
556 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
560 if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
561 sizeof(*mxf->metadata_sets))) < 0) {
562 mxf->metadata_sets_count = 0;
565 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
566 mxf->metadata_sets_count++;
570 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
572 MXFCryptoContext *cryptocontext = arg;
574 return AVERROR_INVALIDDATA;
575 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
576 avio_read(pb, cryptocontext->source_container_ul, 16);
580 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
582 MXFContext *mxf = arg;
585 mxf->packages_count = avio_rb32(pb);
586 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
587 return AVERROR_INVALIDDATA;
588 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
589 if (!mxf->packages_refs)
590 return AVERROR(ENOMEM);
591 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
592 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
598 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
600 MXFStructuralComponent *source_clip = arg;
603 source_clip->duration = avio_rb64(pb);
606 source_clip->start_position = avio_rb64(pb);
609 /* UMID, only get last 16 bytes */
611 avio_read(pb, source_clip->source_package_uid, 16);
614 source_clip->source_track_id = avio_rb32(pb);
620 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
622 MXFPackage *package = arg;
625 package->tracks_count = avio_rb32(pb);
626 if (package->tracks_count >= UINT_MAX / sizeof(UID))
627 return AVERROR_INVALIDDATA;
628 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
629 if (!package->tracks_refs)
630 return AVERROR(ENOMEM);
631 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
632 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
638 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
640 MXFTrack *track = arg;
643 track->track_id = avio_rb32(pb);
646 avio_read(pb, track->track_number, 4);
649 track->edit_rate.num = avio_rb32(pb);
650 track->edit_rate.den = avio_rb32(pb);
653 avio_read(pb, track->sequence_ref, 16);
659 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
661 MXFSequence *sequence = arg;
664 sequence->duration = avio_rb64(pb);
667 avio_read(pb, sequence->data_definition_ul, 16);
670 sequence->structural_components_count = avio_rb32(pb);
671 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
672 return AVERROR_INVALIDDATA;
673 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
674 if (!sequence->structural_components_refs)
675 return AVERROR(ENOMEM);
676 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
677 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
683 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
685 MXFPackage *package = arg;
688 package->tracks_count = avio_rb32(pb);
689 if (package->tracks_count >= UINT_MAX / sizeof(UID))
690 return AVERROR_INVALIDDATA;
691 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
692 if (!package->tracks_refs)
693 return AVERROR(ENOMEM);
694 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
695 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
698 /* UMID, only get last 16 bytes */
700 avio_read(pb, package->package_uid, 16);
703 avio_read(pb, package->descriptor_ref, 16);
709 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
713 segment->nb_index_entries = avio_rb32(pb);
714 if (!segment->nb_index_entries)
716 else if (segment->nb_index_entries < 0 ||
717 segment->nb_index_entries >
718 (INT_MAX / sizeof(*segment->stream_offset_entries)))
719 return AVERROR(ENOMEM);
721 length = avio_rb32(pb);
723 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
724 sizeof(*segment->temporal_offset_entries));
725 segment->flag_entries = av_mallocz(segment->nb_index_entries *
726 sizeof(*segment->flag_entries));
727 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
728 sizeof(*segment->stream_offset_entries));
730 if (!segment->flag_entries || !segment->stream_offset_entries ||
731 !segment->temporal_offset_entries) {
732 av_freep(&segment->flag_entries);
733 av_freep(&segment->stream_offset_entries);
734 av_freep(&segment->temporal_offset_entries);
735 return AVERROR(ENOMEM);
738 for (i = 0; i < segment->nb_index_entries; i++) {
739 segment->temporal_offset_entries[i] = avio_r8(pb);
740 avio_r8(pb); /* KeyFrameOffset */
741 segment->flag_entries[i] = avio_r8(pb);
742 segment->stream_offset_entries[i] = avio_rb64(pb);
743 avio_skip(pb, length - 11);
748 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
750 MXFIndexTableSegment *segment = arg;
753 segment->edit_unit_byte_count = avio_rb32(pb);
754 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
757 segment->index_sid = avio_rb32(pb);
758 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
761 segment->body_sid = avio_rb32(pb);
762 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
765 av_dlog(NULL, "IndexEntryArray found\n");
766 return mxf_read_index_entry_array(pb, segment);
768 segment->index_edit_rate.num = avio_rb32(pb);
769 segment->index_edit_rate.den = avio_rb32(pb);
770 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
771 segment->index_edit_rate.den);
774 segment->index_start_position = avio_rb64(pb);
775 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
778 segment->index_duration = avio_rb64(pb);
779 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
785 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
787 int code, value, ofs = 0;
788 char layout[16] = {0};
793 av_dlog(NULL, "pixel layout: code %#x\n", code);
796 layout[ofs++] = code;
797 layout[ofs++] = value;
799 } while (code != 0); /* SMPTE 377M E.2.46 */
801 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
804 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
806 MXFDescriptor *descriptor = arg;
807 descriptor->pix_fmt = AV_PIX_FMT_NONE;
810 descriptor->sub_descriptors_count = avio_rb32(pb);
811 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
812 return AVERROR_INVALIDDATA;
813 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
814 if (!descriptor->sub_descriptors_refs)
815 return AVERROR(ENOMEM);
816 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
817 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
820 avio_read(pb, descriptor->essence_container_ul, 16);
823 descriptor->linked_track_id = avio_rb32(pb);
825 case 0x3201: /* PictureEssenceCoding */
826 avio_read(pb, descriptor->essence_codec_ul, 16);
829 descriptor->width = avio_rb32(pb);
832 descriptor->height = avio_rb32(pb);
835 descriptor->frame_layout = avio_r8(pb);
838 descriptor->aspect_ratio.num = avio_rb32(pb);
839 descriptor->aspect_ratio.den = avio_rb32(pb);
842 descriptor->field_dominance = avio_r8(pb);
845 descriptor->component_depth = avio_rb32(pb);
848 descriptor->horiz_subsampling = avio_rb32(pb);
851 descriptor->vert_subsampling = avio_rb32(pb);
854 descriptor->sample_rate.num = avio_rb32(pb);
855 descriptor->sample_rate.den = avio_rb32(pb);
857 case 0x3D06: /* SoundEssenceCompression */
858 avio_read(pb, descriptor->essence_codec_ul, 16);
861 descriptor->channels = avio_rb32(pb);
864 descriptor->bits_per_sample = avio_rb32(pb);
867 mxf_read_pixel_layout(pb, descriptor);
870 /* Private uid used by SONY C0023S01.mxf */
871 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
872 av_free(descriptor->extradata);
873 descriptor->extradata_size = 0;
874 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
875 if (!descriptor->extradata)
876 return AVERROR(ENOMEM);
877 descriptor->extradata_size = size;
878 avio_read(pb, descriptor->extradata, size);
886 * Match an uid independently of the version byte and up to len common bytes
889 static int mxf_match_uid(const UID key, const UID uid, int len)
892 for (i = 0; i < len; i++) {
893 if (i != 7 && key[i] != uid[i])
899 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
901 while (uls->uid[0]) {
902 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
909 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
915 for (i = 0; i < mxf->metadata_sets_count; i++) {
916 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
917 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
918 return mxf->metadata_sets[i];
924 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
925 // video essence container uls
926 { { 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 */
927 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
928 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
929 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
932 /* EC ULs for intra-only formats */
933 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
934 { { 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 */
935 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
938 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
939 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
940 { { 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 */
941 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
942 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
945 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
946 // sound essence container uls
947 { { 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 */
948 { { 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 */
949 { { 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 */
950 { { 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 */
951 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
954 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
956 int i, j, nb_segments = 0;
957 MXFIndexTableSegment **unsorted_segments;
958 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
960 /* count number of segments, allocate arrays and copy unsorted segments */
961 for (i = 0; i < mxf->metadata_sets_count; i++)
962 if (mxf->metadata_sets[i]->type == IndexTableSegment)
966 return AVERROR_INVALIDDATA;
968 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
969 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
970 if (!*sorted_segments || !unsorted_segments) {
971 av_freep(sorted_segments);
972 av_free(unsorted_segments);
973 return AVERROR(ENOMEM);
976 for (i = j = 0; i < mxf->metadata_sets_count; i++)
977 if (mxf->metadata_sets[i]->type == IndexTableSegment)
978 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
980 *nb_sorted_segments = 0;
982 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
983 for (i = 0; i < nb_segments; i++) {
984 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
985 uint64_t best_index_duration = 0;
987 for (j = 0; j < nb_segments; j++) {
988 MXFIndexTableSegment *s = unsorted_segments[j];
990 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
991 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
992 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
994 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
995 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
996 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
998 best_body_sid = s->body_sid;
999 best_index_sid = s->index_sid;
1000 best_index_start = s->index_start_position;
1001 best_index_duration = s->index_duration;
1005 /* no suitable entry found -> we're done */
1009 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1010 last_body_sid = best_body_sid;
1011 last_index_sid = best_index_sid;
1012 last_index_start = best_index_start;
1015 av_free(unsorted_segments);
1021 * Computes the absolute file offset of the given essence container offset
1023 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1026 int64_t offset_in = offset; /* for logging */
1028 for (x = 0; x < mxf->partitions_count; x++) {
1029 MXFPartition *p = &mxf->partitions[x];
1031 if (p->body_sid != body_sid)
1034 if (offset < p->essence_length || !p->essence_length) {
1035 *offset_out = p->essence_offset + offset;
1039 offset -= p->essence_length;
1042 av_log(mxf->fc, AV_LOG_ERROR,
1043 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1044 offset_in, body_sid);
1046 return AVERROR_INVALIDDATA;
1050 * Returns the end position of the essence container with given BodySID, or zero if unknown
1052 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1057 for (x = 0; x < mxf->partitions_count; x++) {
1058 MXFPartition *p = &mxf->partitions[x];
1060 if (p->body_sid != body_sid)
1063 if (!p->essence_length)
1066 ret = p->essence_offset + p->essence_length;
1072 /* EditUnit -> absolute offset */
1073 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)
1076 int64_t offset_temp = 0;
1078 for (i = 0; i < index_table->nb_segments; i++) {
1079 MXFIndexTableSegment *s = index_table->segments[i];
1081 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1083 if (edit_unit < s->index_start_position + s->index_duration) {
1084 int64_t index = edit_unit - s->index_start_position;
1086 if (s->edit_unit_byte_count)
1087 offset_temp += s->edit_unit_byte_count * index;
1088 else if (s->nb_index_entries) {
1089 if (s->nb_index_entries == 2 * s->index_duration + 1)
1090 index *= 2; /* Avid index */
1092 if (index < 0 || index >= s->nb_index_entries) {
1093 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1094 index_table->index_sid, s->index_start_position);
1095 return AVERROR_INVALIDDATA;
1098 offset_temp = s->stream_offset_entries[index];
1100 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1101 index_table->index_sid, s->index_start_position);
1102 return AVERROR_INVALIDDATA;
1106 *edit_unit_out = edit_unit;
1108 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1110 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1111 offset_temp += s->edit_unit_byte_count * s->index_duration;
1116 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);
1118 return AVERROR_INVALIDDATA;
1121 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1124 int8_t max_temporal_offset = -128;
1126 /* first compute how many entries we have */
1127 for (i = 0; i < index_table->nb_segments; i++) {
1128 MXFIndexTableSegment *s = index_table->segments[i];
1130 if (!s->nb_index_entries) {
1131 index_table->nb_ptses = 0;
1132 return 0; /* no TemporalOffsets */
1135 index_table->nb_ptses += s->index_duration;
1138 /* paranoid check */
1139 if (index_table->nb_ptses <= 0)
1142 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1143 return AVERROR(ENOMEM);
1145 index_table->ptses = av_mallocz(index_table->nb_ptses *
1147 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1148 sizeof(AVIndexEntry));
1149 if (!index_table->ptses || !index_table->fake_index) {
1150 av_freep(&index_table->ptses);
1151 return AVERROR(ENOMEM);
1154 /* we may have a few bad TemporalOffsets
1155 * make sure the corresponding PTSes don't have the bogus value 0 */
1156 for (x = 0; x < index_table->nb_ptses; x++)
1157 index_table->ptses[x] = AV_NOPTS_VALUE;
1171 * We want to transform it into this:
1182 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1183 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1184 * The latter makes DTS <= PTS.
1186 for (i = x = 0; i < index_table->nb_segments; i++) {
1187 MXFIndexTableSegment *s = index_table->segments[i];
1188 int index_delta = 1;
1189 int n = s->nb_index_entries;
1191 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1192 index_delta = 2; /* Avid index */
1193 /* ignore the last entry - it's the size of the essence container */
1197 for (j = 0; j < n; j += index_delta, x++) {
1198 int offset = s->temporal_offset_entries[j] / index_delta;
1199 int index = x + offset;
1201 if (x >= index_table->nb_ptses) {
1202 av_log(mxf->fc, AV_LOG_ERROR,
1203 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1204 s->nb_index_entries, s->index_duration);
1208 index_table->fake_index[x].timestamp = x;
1209 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1211 if (index < 0 || index >= index_table->nb_ptses) {
1212 av_log(mxf->fc, AV_LOG_ERROR,
1213 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1218 index_table->ptses[index] = x;
1219 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1223 index_table->first_dts = -max_temporal_offset;
1229 * Sorts and collects index table segments into index tables.
1230 * Also computes PTSes if possible.
1232 static int mxf_compute_index_tables(MXFContext *mxf)
1234 int i, j, k, ret, nb_sorted_segments;
1235 MXFIndexTableSegment **sorted_segments = NULL;
1237 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1238 nb_sorted_segments <= 0) {
1239 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1243 /* sanity check and count unique BodySIDs/IndexSIDs */
1244 for (i = 0; i < nb_sorted_segments; i++) {
1245 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1246 mxf->nb_index_tables++;
1247 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1248 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1249 ret = AVERROR_INVALIDDATA;
1250 goto finish_decoding_index;
1254 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1255 sizeof(*mxf->index_tables));
1256 if (!mxf->index_tables) {
1257 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1258 ret = AVERROR(ENOMEM);
1259 goto finish_decoding_index;
1262 /* distribute sorted segments to index tables */
1263 for (i = j = 0; i < nb_sorted_segments; i++) {
1264 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1269 mxf->index_tables[j].nb_segments++;
1272 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1273 MXFIndexTable *t = &mxf->index_tables[j];
1275 t->segments = av_mallocz_array(t->nb_segments,
1276 sizeof(*t->segments));
1279 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1280 " pointer array\n");
1281 ret = AVERROR(ENOMEM);
1282 goto finish_decoding_index;
1285 if (sorted_segments[i]->index_start_position)
1286 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1287 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1289 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1290 t->index_sid = sorted_segments[i]->index_sid;
1291 t->body_sid = sorted_segments[i]->body_sid;
1293 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1294 goto finish_decoding_index;
1296 /* fix zero IndexDurations */
1297 for (k = 0; k < t->nb_segments; k++) {
1298 if (t->segments[k]->index_duration)
1301 if (t->nb_segments > 1)
1302 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1305 if (mxf->fc->nb_streams <= 0) {
1306 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1310 /* assume the first stream's duration is reasonable
1311 * leave index_duration = 0 on further segments in case we have any (unlikely)
1313 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1319 finish_decoding_index:
1320 av_free(sorted_segments);
1324 static int mxf_is_intra_only(MXFDescriptor *d)
1326 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1327 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1328 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1329 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1332 static int mxf_parse_structural_metadata(MXFContext *mxf)
1334 MXFPackage *material_package = NULL;
1335 MXFPackage *temp_package = NULL;
1338 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1339 /* TODO: handle multiple material packages (OP3x) */
1340 for (i = 0; i < mxf->packages_count; i++) {
1341 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1342 if (material_package) break;
1344 if (!material_package) {
1345 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1346 return AVERROR_INVALIDDATA;
1349 for (i = 0; i < material_package->tracks_count; i++) {
1350 MXFPackage *source_package = NULL;
1351 MXFTrack *material_track = NULL;
1352 MXFTrack *source_track = NULL;
1353 MXFTrack *temp_track = NULL;
1354 MXFDescriptor *descriptor = NULL;
1355 MXFStructuralComponent *component = NULL;
1356 UID *essence_container_ul = NULL;
1357 const MXFCodecUL *codec_ul = NULL;
1358 const MXFCodecUL *container_ul = NULL;
1359 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 (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1368 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1372 /* TODO: handle multiple source clips */
1373 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1374 /* TODO: handle timecode component */
1375 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1379 for (k = 0; k < mxf->packages_count; k++) {
1380 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1383 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1384 source_package = temp_package;
1388 if (!source_package) {
1389 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1392 for (k = 0; k < source_package->tracks_count; k++) {
1393 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1394 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1395 ret = AVERROR_INVALIDDATA;
1398 if (temp_track->track_id == component->source_track_id) {
1399 source_track = temp_track;
1403 if (!source_track) {
1404 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1408 if (!source_track || !component)
1411 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1412 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1413 ret = AVERROR_INVALIDDATA;
1417 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1418 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1419 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1420 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1424 st = avformat_new_stream(mxf->fc, NULL);
1426 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1427 ret = AVERROR(ENOMEM);
1430 st->id = source_track->track_id;
1431 st->priv_data = source_track;
1432 source_track->original_duration = st->duration = component->duration;
1433 if (st->duration == -1)
1434 st->duration = AV_NOPTS_VALUE;
1435 st->start_time = component->start_position;
1436 if (material_track->edit_rate.num <= 0 ||
1437 material_track->edit_rate.den <= 0) {
1438 av_log(mxf->fc, AV_LOG_WARNING,
1439 "Invalid edit rate (%d/%d) found on stream #%d, "
1440 "defaulting to 25/1\n",
1441 material_track->edit_rate.num,
1442 material_track->edit_rate.den, st->index);
1443 material_track->edit_rate = (AVRational){25, 1};
1445 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1447 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1448 * the former is accessible via st->priv_data */
1449 source_track->edit_rate = material_track->edit_rate;
1451 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1452 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1453 st->codec->codec_type = codec_ul->id;
1455 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1456 if (source_package->descriptor) {
1457 if (source_package->descriptor->type == MultipleDescriptor) {
1458 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1459 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1461 if (!sub_descriptor) {
1462 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1465 if (sub_descriptor->linked_track_id == source_track->track_id) {
1466 descriptor = sub_descriptor;
1470 } else if (source_package->descriptor->type == Descriptor)
1471 descriptor = source_package->descriptor;
1474 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1477 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1478 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1479 essence_container_ul = &descriptor->essence_container_ul;
1480 /* HACK: replacing the original key with mxf_encrypted_essence_container
1481 * is not allowed according to s429-6, try to find correct information anyway */
1482 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1483 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1484 for (k = 0; k < mxf->metadata_sets_count; k++) {
1485 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1486 if (metadata->type == CryptoContext) {
1487 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1493 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1494 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1495 st->codec->codec_id = codec_ul->id;
1497 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1498 source_track->intra_only = mxf_is_intra_only(descriptor);
1499 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1500 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1501 st->codec->codec_id = container_ul->id;
1502 st->codec->width = descriptor->width;
1503 /* Field height, not frame height */
1504 st->codec->height = descriptor->height;
1505 switch (descriptor->frame_layout) {
1506 case SegmentedFrame:
1507 /* This one is a weird layout I don't fully understand. */
1508 av_log(mxf->fc, AV_LOG_INFO,
1509 "SegmentedFrame layout isn't currently supported\n");
1512 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1515 /* Every other line is stored and needs to be duplicated. */
1516 av_log(mxf->fc, AV_LOG_INFO,
1517 "OneField frame layout isn't currently supported\n");
1519 /* The correct thing to do here is fall through, but by
1520 * breaking we might be able to decode some streams at half
1521 * the vertical resolution, rather than not al all.
1522 * It's also for compatibility with the old behavior. */
1523 case SeparateFields:
1525 switch (descriptor->field_dominance) {
1527 st->codec->field_order = AV_FIELD_TT;
1530 st->codec->field_order = AV_FIELD_BB;
1533 avpriv_request_sample(mxf->fc,
1534 "Field dominance %d support",
1535 descriptor->field_dominance);
1538 /* Turn field height into frame height. */
1539 st->codec->height *= 2;
1541 av_log(mxf->fc, AV_LOG_INFO,
1542 "Unknown frame layout type: %d\n",
1543 descriptor->frame_layout);
1545 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1546 st->codec->pix_fmt = descriptor->pix_fmt;
1547 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1548 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1549 &descriptor->essence_codec_ul);
1550 st->codec->pix_fmt = pix_fmt_ul->id;
1551 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1552 /* support files created before RP224v10 by defaulting to UYVY422
1553 if subsampling is 4:2:2 and component depth is 8-bit */
1554 if (descriptor->horiz_subsampling == 2 &&
1555 descriptor->vert_subsampling == 1 &&
1556 descriptor->component_depth == 8) {
1557 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1562 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1563 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1564 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1565 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1566 st->codec->codec_id = 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 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1572 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1574 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1575 "found for stream #%d, time base forced to 1/48000\n",
1576 descriptor->sample_rate.num, descriptor->sample_rate.den,
1578 avpriv_set_pts_info(st, 64, 1, 48000);
1581 /* if duration is set, rescale it from EditRate to SampleRate */
1582 if (st->duration != AV_NOPTS_VALUE)
1583 st->duration = av_rescale_q(st->duration,
1584 av_inv_q(material_track->edit_rate),
1587 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1588 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1589 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1590 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1591 else if (descriptor->bits_per_sample == 32)
1592 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1593 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1594 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1595 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1596 else if (descriptor->bits_per_sample == 32)
1597 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1598 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1599 st->need_parsing = AVSTREAM_PARSE_FULL;
1602 if (descriptor->extradata) {
1603 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1604 if (st->codec->extradata) {
1605 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1606 st->codec->extradata_size = descriptor->extradata_size;
1608 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1609 ret = ff_generate_avci_extradata(st);
1613 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1614 /* TODO: decode timestamps */
1615 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1624 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1630 return AVERROR(EINVAL);
1632 buf_size = size + size / 2 + 1;
1633 *str = av_malloc(buf_size);
1635 return AVERROR(ENOMEM);
1637 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1645 static int mxf_uid_to_str(UID uid, char **str)
1649 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1651 return AVERROR(ENOMEM);
1652 for (i = 0; i < sizeof(UID); i++) {
1653 snprintf(p, 2 + 1, "%.2x", uid[i]);
1655 if (i == 3 || i == 5 || i == 7 || i == 9) {
1656 snprintf(p, 1 + 1, "-");
1663 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1665 struct tm time = { 0 };
1666 time.tm_year = (timestamp >> 48) - 1900;
1667 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1668 time.tm_mday = (timestamp >> 32 & 0xFF);
1669 time.tm_hour = (timestamp >> 24 & 0xFF);
1670 time.tm_min = (timestamp >> 16 & 0xFF);
1671 time.tm_sec = (timestamp >> 8 & 0xFF);
1673 /* msvcrt versions of strftime calls the invalid parameter handler
1674 * (aborting the process if one isn't set) if the parameters are out
1676 time.tm_mon = av_clip(time.tm_mon, 0, 11);
1677 time.tm_mday = av_clip(time.tm_mday, 1, 31);
1678 time.tm_hour = av_clip(time.tm_hour, 0, 23);
1679 time.tm_min = av_clip(time.tm_min, 0, 59);
1680 time.tm_sec = av_clip(time.tm_sec, 0, 59);
1682 *str = av_mallocz(32);
1684 return AVERROR(ENOMEM);
1685 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1690 #define SET_STR_METADATA(pb, name, str) do { \
1691 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1693 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1696 #define SET_UID_METADATA(pb, name, var, str) do { \
1697 avio_read(pb, var, 16); \
1698 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1700 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1703 #define SET_TS_METADATA(pb, name, var, str) do { \
1704 var = avio_rb64(pb); \
1705 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1707 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1710 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1712 MXFContext *mxf = arg;
1713 AVFormatContext *s = mxf->fc;
1720 SET_STR_METADATA(pb, "company_name", str);
1723 SET_STR_METADATA(pb, "product_name", str);
1726 SET_STR_METADATA(pb, "product_version", str);
1729 SET_UID_METADATA(pb, "product_uid", uid, str);
1732 SET_TS_METADATA(pb, "modification_date", ts, str);
1735 SET_STR_METADATA(pb, "application_platform", str);
1738 SET_UID_METADATA(pb, "generation_uid", uid, str);
1741 SET_UID_METADATA(pb, "uid", uid, str);
1747 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1759 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1762 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1766 { { 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 */
1767 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1768 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1769 { { 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 */
1770 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1771 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1772 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1773 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1774 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1775 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1776 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1779 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1781 AVIOContext *pb = mxf->fc->pb;
1782 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1783 uint64_t klv_end = avio_tell(pb) + klv->length;
1786 return AVERROR(ENOMEM);
1787 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1789 int tag = avio_rb16(pb);
1790 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1791 uint64_t next = avio_tell(pb) + size;
1794 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1795 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1796 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1799 if (tag > 0x7FFF) { /* dynamic tag */
1801 for (i = 0; i < mxf->local_tags_count; i++) {
1802 int local_tag = AV_RB16(mxf->local_tags+i*18);
1803 if (local_tag == tag) {
1804 memcpy(uid, mxf->local_tags+i*18+2, 16);
1805 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1806 PRINT_KEY(mxf->fc, "uid", uid);
1810 if (ctx_size && tag == 0x3C0A)
1811 avio_read(pb, ctx->uid, 16);
1812 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1815 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1816 * it extending past the end of the KLV though (zzuf5.mxf). */
1817 if (avio_tell(pb) > klv_end) {
1821 av_log(mxf->fc, AV_LOG_ERROR,
1822 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1824 return AVERROR_INVALIDDATA;
1825 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1826 avio_seek(pb, next, SEEK_SET);
1828 if (ctx_size) ctx->type = type;
1829 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1833 * Seeks to the previous partition, if possible
1834 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1836 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1838 AVIOContext *pb = mxf->fc->pb;
1840 if (!mxf->current_partition ||
1841 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1842 return 0; /* we've parsed all partitions */
1844 /* seek to previous partition */
1845 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1846 mxf->current_partition = NULL;
1848 av_dlog(mxf->fc, "seeking to previous partition\n");
1854 * Called when essence is encountered
1855 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1857 static int mxf_parse_handle_essence(MXFContext *mxf)
1859 AVIOContext *pb = mxf->fc->pb;
1862 if (mxf->parsing_backward) {
1863 return mxf_seek_to_previous_partition(mxf);
1865 uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1866 : mxf->last_partition;
1869 av_dlog(mxf->fc, "no last partition\n");
1873 av_dlog(mxf->fc, "seeking to last partition\n");
1875 /* remember where we were so we don't end up seeking further back than this */
1876 mxf->last_forward_tell = avio_tell(pb);
1878 if (!pb->seekable) {
1879 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1883 /* seek to last partition and parse backward */
1884 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1885 av_log(mxf->fc, AV_LOG_ERROR,
1886 "failed to seek to last partition @ 0x%" PRIx64
1887 " (%"PRId64") - partial file?\n",
1888 mxf->run_in + offset, ret);
1892 mxf->current_partition = NULL;
1893 mxf->parsing_backward = 1;
1900 * Called when the next partition or EOF is encountered
1901 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1903 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1905 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1909 * Figure out the proper offset and length of the essence container
1912 static void mxf_compute_essence_containers(MXFContext *mxf)
1916 /* everything is already correct */
1917 if (mxf->op == OPAtom)
1920 for (x = 0; x < mxf->partitions_count; x++) {
1921 MXFPartition *p = &mxf->partitions[x];
1924 continue; /* BodySID == 0 -> no essence */
1926 if (x >= mxf->partitions_count - 1)
1927 break; /* last partition - can't compute length (and we don't need to) */
1929 /* essence container spans to the next partition */
1930 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1932 if (p->essence_length < 0) {
1933 /* next ThisPartition < essence_offset */
1934 p->essence_length = 0;
1935 av_log(mxf->fc, AV_LOG_ERROR,
1936 "partition %i: bad ThisPartition = %"PRIX64"\n",
1937 x+1, mxf->partitions[x+1].this_partition);
1942 static int64_t round_to_kag(int64_t position, int kag_size)
1944 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1945 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1946 int64_t ret = (position / kag_size) * kag_size;
1947 return ret == position ? ret : ret + kag_size;
1950 static inline void compute_partition_essence_offset(AVFormatContext *s,
1954 MXFPartition *cur_part = mxf->current_partition;
1955 /* for OP1a we compute essence_offset
1956 * for OPAtom we point essence_offset after the KL
1957 * (usually op1a_essence_offset + 20 or 25)
1958 * TODO: for OP1a we could eliminate this entire if statement, always
1959 * stopping parsing at op1a_essence_offset
1960 * for OPAtom we still need the actual essence_offset though
1961 * (the KL's length can vary)
1963 int64_t op1a_essence_offset =
1964 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1965 cur_part->kag_size) +
1966 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1967 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1969 if (mxf->op == OPAtom) {
1970 /* point essence_offset to the actual data
1971 * OPAtom has all the essence in one big KLV
1973 cur_part->essence_offset = avio_tell(s->pb);
1974 cur_part->essence_length = klv->length;
1976 /* NOTE: op1a_essence_offset may be less than to klv.offset
1978 cur_part->essence_offset = op1a_essence_offset;
1982 static int is_pcm(enum AVCodecID codec_id)
1984 /* we only care about "normal" PCM codecs until we get samples */
1985 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1989 * Deal with the case where for some audio atoms EditUnitByteCount is
1990 * very small (2, 4..). In those cases we should read more than one
1991 * sample per call to mxf_read_packet().
1993 static void mxf_handle_small_eubc(AVFormatContext *s)
1995 MXFContext *mxf = s->priv_data;
1997 /* assuming non-OPAtom == frame wrapped
1998 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1999 if (mxf->op != OPAtom)
2002 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2003 if (s->nb_streams != 1 ||
2004 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2005 !is_pcm(s->streams[0]->codec->codec_id) ||
2006 mxf->nb_index_tables != 1 ||
2007 mxf->index_tables[0].nb_segments != 1 ||
2008 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2011 /* arbitrarily default to 48 kHz PAL audio frame size */
2012 /* TODO: We could compute this from the ratio between the audio
2013 * and video edit rates for 48 kHz NTSC we could use the
2014 * 1802-1802-1802-1802-1801 pattern. */
2015 mxf->edit_units_per_packet = 1920;
2018 static void mxf_read_random_index_pack(AVFormatContext *s)
2020 MXFContext *mxf = s->priv_data;
2025 if (!s->pb->seekable)
2028 file_size = avio_size(s->pb);
2029 avio_seek(s->pb, file_size - 4, SEEK_SET);
2030 length = avio_rb32(s->pb);
2031 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2033 avio_seek(s->pb, file_size - length, SEEK_SET);
2034 if (klv_read_packet(&klv, s->pb) < 0 ||
2035 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2036 klv.length != length - 20)
2039 avio_skip(s->pb, klv.length - 12);
2040 mxf->last_partition = avio_rb64(s->pb);
2043 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2046 static int mxf_read_header(AVFormatContext *s)
2048 MXFContext *mxf = s->priv_data;
2050 int64_t essence_offset = 0;
2053 mxf->last_forward_tell = INT64_MAX;
2054 mxf->edit_units_per_packet = 1;
2056 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2057 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2058 return AVERROR_INVALIDDATA;
2060 avio_seek(s->pb, -14, SEEK_CUR);
2062 mxf->run_in = avio_tell(s->pb);
2064 mxf_read_random_index_pack(s);
2066 while (!s->pb->eof_reached) {
2068 const MXFMetadataReadTableEntry *metadata;
2070 if (klv_read_packet(&klv, s->pb) < 0) {
2071 /* EOF - seek to previous partition or stop */
2072 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2078 PRINT_KEY(s, "read header", klv.key);
2079 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2080 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2081 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2082 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2083 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2085 if (!mxf->current_partition) {
2086 av_log(mxf->fc, AV_LOG_ERROR,
2087 "found essence prior to first PartitionPack\n");
2088 return AVERROR_INVALIDDATA;
2091 if (!mxf->current_partition->essence_offset) {
2092 compute_partition_essence_offset(s, mxf, &klv);
2095 if (!essence_offset)
2096 essence_offset = klv.offset;
2098 /* seek to footer, previous partition or stop */
2099 if (mxf_parse_handle_essence(mxf) <= 0)
2102 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2103 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2104 /* next partition pack - keep going, seek to previous partition or stop */
2105 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2107 else if (mxf->parsing_backward)
2109 /* we're still parsing forward. proceed to parsing this partition pack */
2112 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2113 if (IS_KLV_KEY(klv.key, metadata->key)) {
2115 if (klv.key[5] == 0x53) {
2116 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2118 uint64_t next = avio_tell(s->pb) + klv.length;
2119 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2121 /* only seek forward, else this can loop for a long time */
2122 if (avio_tell(s->pb) > next) {
2123 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2125 return AVERROR_INVALIDDATA;
2128 avio_seek(s->pb, next, SEEK_SET);
2131 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2137 if (!metadata->read)
2138 avio_skip(s->pb, klv.length);
2140 /* FIXME avoid seek */
2141 if (!essence_offset) {
2142 av_log(s, AV_LOG_ERROR, "no essence\n");
2143 return AVERROR_INVALIDDATA;
2145 avio_seek(s->pb, essence_offset, SEEK_SET);
2147 mxf_compute_essence_containers(mxf);
2149 /* we need to do this before computing the index tables
2150 * to be able to fill in zero IndexDurations with st->duration */
2151 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2154 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2157 if (mxf->nb_index_tables > 1) {
2158 /* TODO: look up which IndexSID to use via EssenceContainerData */
2159 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2160 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2161 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2162 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2163 return AVERROR_INVALIDDATA;
2166 mxf_handle_small_eubc(s);
2172 * Sets mxf->current_edit_unit based on what offset we're currently at.
2173 * @return next_ofs if OK, <0 on error
2175 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2177 int64_t last_ofs = -1, next_ofs = -1;
2178 MXFIndexTable *t = &mxf->index_tables[0];
2180 /* this is called from the OP1a demuxing logic, which means there
2181 * may be no index tables */
2182 if (mxf->nb_index_tables <= 0)
2185 /* find mxf->current_edit_unit so that the next edit unit starts ahead
2186 * of current_offset */
2187 while (mxf->current_edit_unit >= 0) {
2188 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2189 NULL, &next_ofs, 0) < 0)
2192 if (next_ofs <= last_ofs) {
2193 /* large next_ofs didn't change or current_edit_unit wrapped
2194 * around this fixes the infinite loop on zzuf3.mxf */
2195 av_log(mxf->fc, AV_LOG_ERROR,
2196 "next_ofs didn't change. not deriving packet timestamps\n");
2200 if (next_ofs > current_offset)
2203 last_ofs = next_ofs;
2204 mxf->current_edit_unit++;
2207 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2208 * may lack IndexEntryArrays */
2209 if (mxf->current_edit_unit < 0)
2215 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2216 uint64_t *sample_count)
2218 int i, total = 0, size = 0;
2219 AVStream *st = mxf->fc->streams[stream_index];
2220 MXFTrack *track = st->priv_data;
2221 AVRational time_base = av_inv_q(track->edit_rate);
2222 AVRational sample_rate = av_inv_q(st->time_base);
2223 const MXFSamplesPerFrame *spf = NULL;
2225 if ((sample_rate.num / sample_rate.den) == 48000)
2226 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2228 int remainder = (sample_rate.num * time_base.num) %
2229 (time_base.den * sample_rate.den);
2230 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2231 av_mul_q(sample_rate, time_base)));
2233 av_log(mxf->fc, AV_LOG_WARNING,
2234 "seeking detected on stream #%d with time base (%d/%d) and "
2235 "sample rate (%d/%d), audio pts won't be accurate.\n",
2236 stream_index, time_base.num, time_base.den,
2237 sample_rate.num, sample_rate.den);
2241 while (spf->samples_per_frame[size]) {
2242 total += spf->samples_per_frame[size];
2249 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2250 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2251 *sample_count += spf->samples_per_frame[i];
2257 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2260 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2261 int64_t bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2263 pkt->pts = track->sample_count;
2265 if (codec->channels <= 0 || codec->channels * bits_per_sample < 8)
2266 return AVERROR_INVALIDDATA;
2268 track->sample_count += pkt->size / (codec->channels * bits_per_sample / 8);
2272 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2275 MXFContext *mxf = s->priv_data;
2278 while (!s->pb->eof_reached) {
2279 if ((ret = klv_read_packet(&klv, s->pb)) < 0)
2281 PRINT_KEY(s, "read packet", klv.key);
2282 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2283 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2284 ret = mxf_decrypt_triplet(s, pkt, &klv);
2286 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2291 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2292 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2293 int index = mxf_get_stream_index(s, &klv);
2294 int64_t next_ofs, next_klv;
2297 AVCodecContext *codec;
2300 av_log(s, AV_LOG_ERROR,
2301 "error getting stream index %"PRIu32"\n",
2302 AV_RB32(klv.key + 12));
2306 st = s->streams[index];
2307 track = st->priv_data;
2309 if (s->streams[index]->discard == AVDISCARD_ALL)
2312 next_klv = avio_tell(s->pb) + klv.length;
2313 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2315 if (next_ofs >= 0 && next_klv > next_ofs) {
2316 /* if this check is hit then it's possible OPAtom was treated
2317 * as OP1a truncate the packet since it's probably very large
2318 * (>2 GiB is common) */
2319 avpriv_request_sample(s,
2320 "OPAtom misinterpreted as OP1a?"
2321 "KLV for edit unit %i extending into "
2323 mxf->current_edit_unit);
2324 klv.length = next_ofs - avio_tell(s->pb);
2327 /* check for 8 channels AES3 element */
2328 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2329 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2332 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2336 ret = av_get_packet(s->pb, pkt, klv.length);
2340 pkt->stream_index = index;
2341 pkt->pos = klv.offset;
2343 codec = s->streams[index]->codec;
2345 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2346 /* mxf->current_edit_unit good - see if we have an
2347 * index table to derive timestamps from */
2348 MXFIndexTable *t = &mxf->index_tables[0];
2350 if (mxf->nb_index_tables >= 1 &&
2351 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 (track->intra_only) {
2355 /* intra-only -> PTS = EditUnit.
2356 * let utils.c figure out DTS since it can be
2357 * < PTS if low_delay = 0 (Sony IMX30) */
2358 pkt->pts = mxf->current_edit_unit;
2360 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2361 ret = mxf_set_audio_pts(mxf, codec, pkt);
2366 /* seek for truncated packets */
2367 avio_seek(s->pb, next_klv, SEEK_SET);
2372 avio_skip(s->pb, klv.length);
2377 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2379 MXFContext *mxf = s->priv_data;
2381 int64_t ret64, pos, next_pos;
2386 if (mxf->op != OPAtom)
2387 return mxf_read_packet_old(s, pkt);
2389 /* OPAtom - clip wrapped demuxing */
2390 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2392 t = &mxf->index_tables[0];
2394 if (mxf->current_edit_unit >= st->duration)
2397 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2399 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2402 /* compute size by finding the next edit unit or the end of the essence container
2403 * not pretty, but it works */
2404 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2405 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2406 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2407 return AVERROR_INVALIDDATA;
2410 if ((size = next_pos - pos) <= 0) {
2411 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2412 return AVERROR_INVALIDDATA;
2415 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2418 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2419 return ret < 0 ? ret : AVERROR_EOF;
2421 pkt->stream_index = 0;
2423 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2424 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2425 pkt->dts = mxf->current_edit_unit + t->first_dts;
2426 pkt->pts = t->ptses[mxf->current_edit_unit];
2427 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2428 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2433 mxf->current_edit_unit += edit_units;
2439 static int mxf_read_close(AVFormatContext *s)
2441 MXFContext *mxf = s->priv_data;
2442 MXFIndexTableSegment *seg;
2445 av_freep(&mxf->packages_refs);
2447 for (i = 0; i < s->nb_streams; i++)
2448 s->streams[i]->priv_data = NULL;
2450 for (i = 0; i < mxf->metadata_sets_count; i++) {
2451 switch (mxf->metadata_sets[i]->type) {
2453 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2455 case MultipleDescriptor:
2456 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2459 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2462 case MaterialPackage:
2463 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2465 case IndexTableSegment:
2466 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2467 av_freep(&seg->temporal_offset_entries);
2468 av_freep(&seg->flag_entries);
2469 av_freep(&seg->stream_offset_entries);
2474 av_freep(&mxf->metadata_sets[i]);
2476 av_freep(&mxf->partitions);
2477 av_freep(&mxf->metadata_sets);
2478 av_freep(&mxf->aesc);
2479 av_freep(&mxf->local_tags);
2481 for (i = 0; i < mxf->nb_index_tables; i++) {
2482 av_freep(&mxf->index_tables[i].segments);
2483 av_freep(&mxf->index_tables[i].ptses);
2484 av_freep(&mxf->index_tables[i].fake_index);
2486 av_freep(&mxf->index_tables);
2491 static int mxf_probe(AVProbeData *p) {
2492 uint8_t *bufp = p->buf;
2493 uint8_t *end = p->buf + p->buf_size;
2495 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2498 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2499 end -= sizeof(mxf_header_partition_pack_key);
2500 for (; bufp < end; bufp++) {
2501 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2502 return AVPROBE_SCORE_MAX;
2507 /* rudimentary byte seek */
2508 /* XXX: use MXF Index */
2509 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2511 AVStream *st = s->streams[stream_index];
2513 MXFContext* mxf = s->priv_data;
2517 MXFTrack *source_track = st->priv_data;
2519 /* if audio then truncate sample_time to EditRate */
2520 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2521 sample_time = av_rescale_q(sample_time, st->time_base,
2522 av_inv_q(source_track->edit_rate));
2524 if (mxf->nb_index_tables <= 0) {
2526 return AVERROR_INVALIDDATA;
2527 if (sample_time < 0)
2529 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2531 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2535 ff_update_cur_dts(s, st, sample_time);
2536 mxf->current_edit_unit = sample_time;
2538 t = &mxf->index_tables[0];
2540 /* clamp above zero, else ff_index_search_timestamp() returns negative
2541 * this also means we allow seeking before the start */
2542 sample_time = FFMAX(sample_time, 0);
2544 if (t->fake_index) {
2545 /* behave as if we have a proper index */
2546 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2549 /* no IndexEntryArray (one or more CBR segments)
2550 * make sure we don't seek past the end */
2551 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2554 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2557 ff_update_cur_dts(s, st, sample_time);
2558 mxf->current_edit_unit = sample_time;
2559 avio_seek(s->pb, seekpos, SEEK_SET);
2562 // Update all tracks sample count
2563 for (i = 0; i < s->nb_streams; i++) {
2564 AVStream *cur_st = s->streams[i];
2565 MXFTrack *cur_track = cur_st->priv_data;
2566 uint64_t current_sample_count = 0;
2567 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2568 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2572 cur_track->sample_count = current_sample_count;
2578 AVInputFormat ff_mxf_demuxer = {
2580 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2581 .priv_data_size = sizeof(MXFContext),
2582 .read_probe = mxf_probe,
2583 .read_header = mxf_read_header,
2584 .read_packet = mxf_read_packet,
2585 .read_close = mxf_read_close,
2586 .read_seek = mxf_read_seek,