3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
46 #include "libavutil/aes.h"
47 #include "libavutil/avassert.h"
48 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavutil/timecode.h"
72 OPSONYOpt, /* FATE sample, violates the spec in places */
78 MXFPartitionType type;
79 uint64_t previous_partition;
82 int64_t this_partition;
83 int64_t essence_offset; ///< absolute offset of essence
84 int64_t essence_length;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
103 int64_t start_position;
105 } MXFStructuralComponent;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
118 enum MXFMetadataSetType type;
121 struct AVRational rate;
123 } MXFTimecodeComponent;
127 enum MXFMetadataSetType type;
128 MXFSequence *sequence; /* mandatory, and only one */
131 uint8_t track_number[4];
132 AVRational edit_rate;
134 uint64_t sample_count;
135 int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate
140 enum MXFMetadataSetType type;
141 UID essence_container_ul;
142 UID essence_codec_ul;
143 AVRational sample_rate;
144 AVRational aspect_ratio;
146 int height; /* Field height, not frame height */
147 int frame_layout; /* See MXFFrameLayout enum */
151 unsigned int component_depth;
152 unsigned int horiz_subsampling;
153 unsigned int vert_subsampling;
154 UID *sub_descriptors_refs;
155 int sub_descriptors_count;
159 enum AVPixelFormat pix_fmt;
164 enum MXFMetadataSetType type;
165 int edit_unit_byte_count;
168 AVRational index_edit_rate;
169 uint64_t index_start_position;
170 uint64_t index_duration;
171 int8_t *temporal_offset_entries;
173 uint64_t *stream_offset_entries;
174 int nb_index_entries;
175 } MXFIndexTableSegment;
179 enum MXFMetadataSetType type;
183 MXFDescriptor *descriptor; /* only one */
189 enum MXFMetadataSetType type;
192 /* decoded index table */
196 int nb_ptses; /* number of PTSes or total duration of index */
197 int64_t first_dts; /* DTS = EditUnit + first_dts */
198 int64_t *ptses; /* maps EditUnit -> PTS */
200 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
201 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
205 MXFPartition *partitions;
206 unsigned partitions_count;
210 MXFMetadataSet **metadata_sets;
211 int metadata_sets_count;
215 int local_tags_count;
216 uint64_t footer_partition;
217 KLVPacket current_klv_data;
218 int current_klv_index;
220 MXFPartition *current_partition;
221 int parsing_backward;
222 int64_t last_forward_tell;
223 int last_forward_partition;
224 int current_edit_unit;
226 MXFIndexTable *index_tables;
227 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
230 enum MXFWrappingScheme {
235 /* NOTE: klv_offset is not set (-1) for local keys */
236 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
240 MXFMetadataReadFunc *read;
242 enum MXFMetadataSetType type;
243 } MXFMetadataReadTableEntry;
245 static int mxf_read_close(AVFormatContext *s);
247 /* partial keys to match */
248 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
249 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
250 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
251 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
252 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
253 /* complete keys to match */
254 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
255 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
256 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
257 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
259 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
261 static int64_t klv_decode_ber_length(AVIOContext *pb)
263 uint64_t size = avio_r8(pb);
264 if (size & 0x80) { /* long form */
265 int bytes_num = size & 0x7f;
266 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
268 return AVERROR_INVALIDDATA;
271 size = size << 8 | avio_r8(pb);
276 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
279 for (i = 0; i < size && !url_feof(pb); i++) {
283 else if (b != key[i])
289 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
291 if (!mxf_read_sync(pb, mxf_klv_key, 4))
292 return AVERROR_INVALIDDATA;
293 klv->offset = avio_tell(pb) - 4;
294 memcpy(klv->key, mxf_klv_key, 4);
295 avio_read(pb, klv->key + 4, 12);
296 klv->length = klv_decode_ber_length(pb);
297 return klv->length == -1 ? -1 : 0;
300 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
304 for (i = 0; i < s->nb_streams; i++) {
305 MXFTrack *track = s->streams[i]->priv_data;
307 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
310 /* return 0 if only one stream, for OP Atom files with 0 as track number */
311 return s->nb_streams == 1 ? 0 : -1;
314 /* XXX: use AVBitStreamFilter */
315 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
317 const uint8_t *buf_ptr, *end_ptr;
321 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
322 return AVERROR_INVALIDDATA;
323 length = av_get_packet(pb, pkt, length);
326 data_ptr = pkt->data;
327 end_ptr = pkt->data + length;
328 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
329 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
330 for (i = 0; i < st->codec->channels; i++) {
331 uint32_t sample = bytestream_get_le32(&buf_ptr);
332 if (st->codec->bits_per_coded_sample == 24)
333 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
335 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
337 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
339 av_shrink_packet(pkt, data_ptr - pkt->data);
343 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
345 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
346 MXFContext *mxf = s->priv_data;
347 AVIOContext *pb = s->pb;
348 int64_t end = avio_tell(pb) + klv->length;
351 uint64_t plaintext_size;
356 if (!mxf->aesc && s->key && s->keylen == 16) {
357 mxf->aesc = av_aes_alloc();
359 return AVERROR(ENOMEM);
360 av_aes_init(mxf->aesc, s->key, 128, 1);
363 avio_skip(pb, klv_decode_ber_length(pb));
365 klv_decode_ber_length(pb);
366 plaintext_size = avio_rb64(pb);
368 klv_decode_ber_length(pb);
369 avio_read(pb, klv->key, 16);
370 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
371 return AVERROR_INVALIDDATA;
372 index = mxf_get_stream_index(s, klv);
374 return AVERROR_INVALIDDATA;
376 klv_decode_ber_length(pb);
377 orig_size = avio_rb64(pb);
378 if (orig_size < plaintext_size)
379 return AVERROR_INVALIDDATA;
381 size = klv_decode_ber_length(pb);
382 if (size < 32 || size - 32 < orig_size)
383 return AVERROR_INVALIDDATA;
384 avio_read(pb, ivec, 16);
385 avio_read(pb, tmpbuf, 16);
387 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
388 if (memcmp(tmpbuf, checkv, 16))
389 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
391 size = av_get_packet(pb, pkt, size);
394 else if (size < plaintext_size)
395 return AVERROR_INVALIDDATA;
396 size -= plaintext_size;
398 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
399 &pkt->data[plaintext_size], size >> 4, ivec, 1);
400 av_shrink_packet(pkt, orig_size);
401 pkt->stream_index = index;
402 avio_skip(pb, end - avio_tell(pb));
406 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
408 MXFContext *mxf = arg;
409 int item_num = avio_rb32(pb);
410 int item_len = avio_rb32(pb);
412 if (item_len != 18) {
413 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
414 return AVERROR_PATCHWELCOME;
416 if (item_num > 65536) {
417 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
418 return AVERROR_INVALIDDATA;
420 mxf->local_tags = av_calloc(item_num, item_len);
421 if (!mxf->local_tags)
422 return AVERROR(ENOMEM);
423 mxf->local_tags_count = item_num;
424 avio_read(pb, mxf->local_tags, item_num*item_len);
428 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
430 MXFContext *mxf = arg;
431 MXFPartition *partition, *tmp_part;
433 uint64_t footer_partition;
434 uint32_t nb_essence_containers;
436 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
437 return AVERROR(ENOMEM);
439 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
441 return AVERROR(ENOMEM);
442 mxf->partitions = tmp_part;
444 if (mxf->parsing_backward) {
445 /* insert the new partition pack in the middle
446 * this makes the entries in mxf->partitions sorted by offset */
447 memmove(&mxf->partitions[mxf->last_forward_partition+1],
448 &mxf->partitions[mxf->last_forward_partition],
449 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
450 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
452 mxf->last_forward_partition++;
453 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
456 memset(partition, 0, sizeof(*partition));
457 mxf->partitions_count++;
458 partition->pack_length = avio_tell(pb) - klv_offset + size;
462 partition->type = Header;
465 partition->type = BodyPartition;
468 partition->type = Footer;
471 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
472 return AVERROR_INVALIDDATA;
475 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
476 partition->closed = partition->type == Footer || !(uid[14] & 1);
477 partition->complete = uid[14] > 2;
479 partition->kag_size = avio_rb32(pb);
480 partition->this_partition = avio_rb64(pb);
481 partition->previous_partition = avio_rb64(pb);
482 footer_partition = avio_rb64(pb);
483 partition->header_byte_count = avio_rb64(pb);
484 partition->index_byte_count = avio_rb64(pb);
485 partition->index_sid = avio_rb32(pb);
487 partition->body_sid = avio_rb32(pb);
488 avio_read(pb, op, sizeof(UID));
489 nb_essence_containers = avio_rb32(pb);
491 /* some files don'thave FooterPartition set in every partition */
492 if (footer_partition) {
493 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
494 av_log(mxf->fc, AV_LOG_ERROR,
495 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
496 mxf->footer_partition, footer_partition);
498 mxf->footer_partition = footer_partition;
503 "PartitionPack: ThisPartition = 0x%"PRIX64
504 ", PreviousPartition = 0x%"PRIX64", "
505 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
506 partition->this_partition,
507 partition->previous_partition, footer_partition,
508 partition->index_sid, partition->body_sid);
510 /* sanity check PreviousPartition if set */
511 if (partition->previous_partition &&
512 mxf->run_in + partition->previous_partition >= klv_offset) {
513 av_log(mxf->fc, AV_LOG_ERROR,
514 "PreviousPartition points to this partition or forward\n");
515 return AVERROR_INVALIDDATA;
518 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
519 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
520 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
521 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
522 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
523 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
524 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
525 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
526 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
527 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
528 else if (op[12] == 0x10) {
529 /* SMPTE 390m: "There shall be exactly one essence container"
530 * The following block deals with files that violate this, namely:
531 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
532 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
533 if (nb_essence_containers != 1) {
534 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
538 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
539 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
545 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
549 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
550 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
552 if (mxf->op == OPSONYOpt)
553 partition->kag_size = 512;
555 partition->kag_size = 1;
557 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
563 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
565 MXFMetadataSet **tmp;
566 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
567 return AVERROR(ENOMEM);
568 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
570 return AVERROR(ENOMEM);
571 mxf->metadata_sets = tmp;
572 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
573 mxf->metadata_sets_count++;
577 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
579 MXFCryptoContext *cryptocontext = arg;
581 return AVERROR_INVALIDDATA;
582 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
583 avio_read(pb, cryptocontext->source_container_ul, 16);
587 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
589 MXFContext *mxf = arg;
592 mxf->packages_count = avio_rb32(pb);
593 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
594 if (!mxf->packages_refs)
595 return AVERROR(ENOMEM);
596 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
597 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
603 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
605 MXFStructuralComponent *source_clip = arg;
608 source_clip->duration = avio_rb64(pb);
611 source_clip->start_position = avio_rb64(pb);
614 /* UMID, only get last 16 bytes */
616 avio_read(pb, source_clip->source_package_uid, 16);
619 source_clip->source_track_id = avio_rb32(pb);
625 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
627 MXFPackage *package = arg;
630 package->tracks_count = avio_rb32(pb);
631 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
632 if (!package->tracks_refs)
633 return AVERROR(ENOMEM);
634 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
635 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
641 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
643 MXFTimecodeComponent *mxf_timecode = arg;
646 mxf_timecode->start_frame = avio_rb64(pb);
649 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
652 mxf_timecode->drop_frame = avio_r8(pb);
658 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
660 MXFTrack *track = arg;
663 track->track_id = avio_rb32(pb);
666 avio_read(pb, track->track_number, 4);
669 track->edit_rate.num = avio_rb32(pb);
670 track->edit_rate.den = avio_rb32(pb);
673 avio_read(pb, track->sequence_ref, 16);
679 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
681 MXFSequence *sequence = arg;
684 sequence->duration = avio_rb64(pb);
687 avio_read(pb, sequence->data_definition_ul, 16);
690 sequence->structural_components_count = avio_rb32(pb);
691 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
692 if (!sequence->structural_components_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 *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
701 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
703 MXFPackage *package = arg;
706 package->tracks_count = avio_rb32(pb);
707 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
708 if (!package->tracks_refs)
709 return AVERROR(ENOMEM);
710 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
711 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
714 /* UMID, only get last 16 bytes */
716 avio_read(pb, package->package_uid, 16);
719 avio_read(pb, package->descriptor_ref, 16);
725 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
729 segment->nb_index_entries = avio_rb32(pb);
731 length = avio_rb32(pb);
733 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
734 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
735 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
736 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}; /* not for printing, may end up not terminated on purpose */
793 av_dlog(NULL, "pixel layout: code %#x\n", code);
796 layout[ofs++] = code;
797 layout[ofs++] = value;
799 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
800 } while (code != 0); /* SMPTE 377M E.2.46 */
802 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
805 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
807 MXFDescriptor *descriptor = arg;
808 descriptor->pix_fmt = AV_PIX_FMT_NONE;
811 descriptor->sub_descriptors_count = avio_rb32(pb);
812 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
813 if (!descriptor->sub_descriptors_refs)
814 return AVERROR(ENOMEM);
815 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
816 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
819 avio_read(pb, descriptor->essence_container_ul, 16);
822 descriptor->linked_track_id = avio_rb32(pb);
824 case 0x3201: /* PictureEssenceCoding */
825 avio_read(pb, descriptor->essence_codec_ul, 16);
828 descriptor->width = avio_rb32(pb);
831 descriptor->height = avio_rb32(pb);
834 descriptor->frame_layout = avio_r8(pb);
837 descriptor->aspect_ratio.num = avio_rb32(pb);
838 descriptor->aspect_ratio.den = avio_rb32(pb);
841 descriptor->field_dominance = avio_r8(pb);
844 descriptor->component_depth = avio_rb32(pb);
847 descriptor->horiz_subsampling = avio_rb32(pb);
850 descriptor->vert_subsampling = avio_rb32(pb);
853 descriptor->sample_rate.num = avio_rb32(pb);
854 descriptor->sample_rate.den = avio_rb32(pb);
856 case 0x3D06: /* SoundEssenceCompression */
857 avio_read(pb, descriptor->essence_codec_ul, 16);
860 descriptor->channels = avio_rb32(pb);
863 descriptor->bits_per_sample = avio_rb32(pb);
866 mxf_read_pixel_layout(pb, descriptor);
869 /* Private uid used by SONY C0023S01.mxf */
870 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
871 if (descriptor->extradata)
872 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
873 av_free(descriptor->extradata);
874 descriptor->extradata_size = 0;
875 descriptor->extradata = av_malloc(size);
876 if (!descriptor->extradata)
877 return AVERROR(ENOMEM);
878 descriptor->extradata_size = size;
879 avio_read(pb, descriptor->extradata, size);
887 * Match an uid independently of the version byte and up to len common bytes
890 static int mxf_match_uid(const UID key, const UID uid, int len)
893 for (i = 0; i < len; i++) {
894 if (i != 7 && key[i] != uid[i])
900 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
902 while (uls->uid[0]) {
903 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
910 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
916 for (i = 0; i < mxf->metadata_sets_count; i++) {
917 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
918 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
919 return mxf->metadata_sets[i];
925 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
926 // video essence container uls
927 { { 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 */
928 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
929 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
930 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
933 /* EC ULs for intra-only formats */
934 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
935 { { 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 */
936 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
939 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
940 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
941 { { 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 */
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 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
969 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
970 av_freep(sorted_segments);
971 av_free(unsorted_segments);
972 return AVERROR(ENOMEM);
975 for (i = j = 0; i < mxf->metadata_sets_count; i++)
976 if (mxf->metadata_sets[i]->type == IndexTableSegment)
977 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
979 *nb_sorted_segments = 0;
981 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
982 for (i = 0; i < nb_segments; i++) {
983 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
984 uint64_t best_index_duration = 0;
986 for (j = 0; j < nb_segments; j++) {
987 MXFIndexTableSegment *s = unsorted_segments[j];
989 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
990 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
991 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
993 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
994 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
995 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
997 best_body_sid = s->body_sid;
998 best_index_sid = s->index_sid;
999 best_index_start = s->index_start_position;
1000 best_index_duration = s->index_duration;
1004 /* no suitable entry found -> we're done */
1008 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1009 last_body_sid = best_body_sid;
1010 last_index_sid = best_index_sid;
1011 last_index_start = best_index_start;
1014 av_free(unsorted_segments);
1020 * Computes the absolute file offset of the given essence container offset
1022 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1025 int64_t offset_in = offset; /* for logging */
1027 for (x = 0; x < mxf->partitions_count; x++) {
1028 MXFPartition *p = &mxf->partitions[x];
1030 if (p->body_sid != body_sid)
1033 if (offset < p->essence_length || !p->essence_length) {
1034 *offset_out = p->essence_offset + offset;
1038 offset -= p->essence_length;
1041 av_log(mxf->fc, AV_LOG_ERROR,
1042 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1043 offset_in, body_sid);
1045 return AVERROR_INVALIDDATA;
1049 * Returns the end position of the essence container with given BodySID, or zero if unknown
1051 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1056 for (x = 0; x < mxf->partitions_count; x++) {
1057 MXFPartition *p = &mxf->partitions[x];
1059 if (p->body_sid != body_sid)
1062 if (!p->essence_length)
1065 ret = p->essence_offset + p->essence_length;
1071 /* EditUnit -> absolute offset */
1072 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)
1075 int64_t offset_temp = 0;
1077 for (i = 0; i < index_table->nb_segments; i++) {
1078 MXFIndexTableSegment *s = index_table->segments[i];
1080 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1082 if (edit_unit < s->index_start_position + s->index_duration) {
1083 int64_t index = edit_unit - s->index_start_position;
1085 if (s->edit_unit_byte_count)
1086 offset_temp += s->edit_unit_byte_count * index;
1087 else if (s->nb_index_entries) {
1088 if (s->nb_index_entries == 2 * s->index_duration + 1)
1089 index *= 2; /* Avid index */
1091 if (index < 0 || index >= s->nb_index_entries) {
1092 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1093 index_table->index_sid, s->index_start_position);
1094 return AVERROR_INVALIDDATA;
1097 offset_temp = s->stream_offset_entries[index];
1099 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1100 index_table->index_sid, s->index_start_position);
1101 return AVERROR_INVALIDDATA;
1105 *edit_unit_out = edit_unit;
1107 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1109 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1110 offset_temp += s->edit_unit_byte_count * s->index_duration;
1115 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);
1117 return AVERROR_INVALIDDATA;
1120 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1123 int8_t max_temporal_offset = -128;
1125 /* first compute how many entries we have */
1126 for (i = 0; i < index_table->nb_segments; i++) {
1127 MXFIndexTableSegment *s = index_table->segments[i];
1129 if (!s->nb_index_entries) {
1130 index_table->nb_ptses = 0;
1131 return 0; /* no TemporalOffsets */
1134 index_table->nb_ptses += s->index_duration;
1137 /* paranoid check */
1138 if (index_table->nb_ptses <= 0)
1141 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1142 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1143 av_freep(&index_table->ptses);
1144 return AVERROR(ENOMEM);
1147 /* we may have a few bad TemporalOffsets
1148 * make sure the corresponding PTSes don't have the bogus value 0 */
1149 for (x = 0; x < index_table->nb_ptses; x++)
1150 index_table->ptses[x] = AV_NOPTS_VALUE;
1164 * We want to transform it into this:
1175 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1176 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1177 * The latter makes DTS <= PTS.
1179 for (i = x = 0; i < index_table->nb_segments; i++) {
1180 MXFIndexTableSegment *s = index_table->segments[i];
1181 int index_delta = 1;
1182 int n = s->nb_index_entries;
1184 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1185 index_delta = 2; /* Avid index */
1186 /* ignore the last entry - it's the size of the essence container */
1190 for (j = 0; j < n; j += index_delta, x++) {
1191 int offset = s->temporal_offset_entries[j] / index_delta;
1192 int index = x + offset;
1194 if (x >= index_table->nb_ptses) {
1195 av_log(mxf->fc, AV_LOG_ERROR,
1196 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1197 s->nb_index_entries, s->index_duration);
1201 index_table->fake_index[x].timestamp = x;
1202 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1204 if (index < 0 || index >= index_table->nb_ptses) {
1205 av_log(mxf->fc, AV_LOG_ERROR,
1206 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1211 index_table->ptses[index] = x;
1212 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1216 index_table->first_dts = -max_temporal_offset;
1222 * Sorts and collects index table segments into index tables.
1223 * Also computes PTSes if possible.
1225 static int mxf_compute_index_tables(MXFContext *mxf)
1227 int i, j, k, ret, nb_sorted_segments;
1228 MXFIndexTableSegment **sorted_segments = NULL;
1230 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1231 nb_sorted_segments <= 0) {
1232 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1236 /* sanity check and count unique BodySIDs/IndexSIDs */
1237 for (i = 0; i < nb_sorted_segments; i++) {
1238 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1239 mxf->nb_index_tables++;
1240 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1241 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1242 ret = AVERROR_INVALIDDATA;
1243 goto finish_decoding_index;
1247 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1248 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1249 ret = AVERROR(ENOMEM);
1250 goto finish_decoding_index;
1253 /* distribute sorted segments to index tables */
1254 for (i = j = 0; i < nb_sorted_segments; i++) {
1255 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1260 mxf->index_tables[j].nb_segments++;
1263 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1264 MXFIndexTable *t = &mxf->index_tables[j];
1266 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1267 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1268 ret = AVERROR(ENOMEM);
1269 goto finish_decoding_index;
1272 if (sorted_segments[i]->index_start_position)
1273 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1274 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1276 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1277 t->index_sid = sorted_segments[i]->index_sid;
1278 t->body_sid = sorted_segments[i]->body_sid;
1280 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1281 goto finish_decoding_index;
1283 /* fix zero IndexDurations */
1284 for (k = 0; k < t->nb_segments; k++) {
1285 if (t->segments[k]->index_duration)
1288 if (t->nb_segments > 1)
1289 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1292 if (mxf->fc->nb_streams <= 0) {
1293 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1297 /* assume the first stream's duration is reasonable
1298 * leave index_duration = 0 on further segments in case we have any (unlikely)
1300 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1306 finish_decoding_index:
1307 av_free(sorted_segments);
1311 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1313 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1314 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1315 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1316 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1319 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1321 char buf[AV_TIMECODE_STR_SIZE];
1322 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1327 static int mxf_parse_structural_metadata(MXFContext *mxf)
1329 MXFPackage *material_package = NULL;
1330 MXFPackage *temp_package = NULL;
1333 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1334 /* TODO: handle multiple material packages (OP3x) */
1335 for (i = 0; i < mxf->packages_count; i++) {
1336 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1337 if (material_package) break;
1339 if (!material_package) {
1340 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1341 return AVERROR_INVALIDDATA;
1344 for (i = 0; i < material_package->tracks_count; i++) {
1345 MXFPackage *source_package = NULL;
1346 MXFTrack *material_track = NULL;
1347 MXFTrack *source_track = NULL;
1348 MXFTrack *temp_track = NULL;
1349 MXFDescriptor *descriptor = NULL;
1350 MXFStructuralComponent *component = NULL;
1351 MXFTimecodeComponent *mxf_tc = NULL;
1352 UID *essence_container_ul = NULL;
1353 const MXFCodecUL *codec_ul = NULL;
1354 const MXFCodecUL *container_ul = NULL;
1355 const MXFCodecUL *pix_fmt_ul = NULL;
1360 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1361 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1365 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1366 mxf_tc = (MXFTimecodeComponent*)component;
1367 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1368 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1369 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1373 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1374 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1378 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1379 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1383 mxf_tc = (MXFTimecodeComponent*)component;
1384 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1385 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1386 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1391 /* TODO: handle multiple source clips */
1392 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1393 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1397 for (k = 0; k < mxf->packages_count; k++) {
1398 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1401 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1402 source_package = temp_package;
1406 if (!source_package) {
1407 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1410 for (k = 0; k < source_package->tracks_count; k++) {
1411 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1412 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1413 ret = AVERROR_INVALIDDATA;
1416 if (temp_track->track_id == component->source_track_id) {
1417 source_track = temp_track;
1421 if (!source_track) {
1422 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1426 if (!source_track || !component)
1429 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1430 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1431 ret = AVERROR_INVALIDDATA;
1435 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1436 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1437 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1438 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1442 st = avformat_new_stream(mxf->fc, NULL);
1444 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1445 ret = AVERROR(ENOMEM);
1448 st->id = source_track->track_id;
1449 st->priv_data = source_track;
1450 source_track->original_duration = st->duration = component->duration;
1451 if (st->duration == -1)
1452 st->duration = AV_NOPTS_VALUE;
1453 st->start_time = component->start_position;
1454 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1455 av_log(mxf->fc, AV_LOG_WARNING,
1456 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1457 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1458 material_track->edit_rate = (AVRational){25, 1};
1460 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1462 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1463 source_track->edit_rate = material_track->edit_rate;
1465 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1466 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1467 st->codec->codec_type = codec_ul->id;
1469 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1470 if (source_package->descriptor) {
1471 if (source_package->descriptor->type == MultipleDescriptor) {
1472 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1473 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1475 if (!sub_descriptor) {
1476 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1479 if (sub_descriptor->linked_track_id == source_track->track_id) {
1480 descriptor = sub_descriptor;
1484 } else if (source_package->descriptor->type == Descriptor)
1485 descriptor = source_package->descriptor;
1488 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1491 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1492 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1493 essence_container_ul = &descriptor->essence_container_ul;
1494 /* HACK: replacing the original key with mxf_encrypted_essence_container
1495 * is not allowed according to s429-6, try to find correct information anyway */
1496 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1497 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1498 for (k = 0; k < mxf->metadata_sets_count; k++) {
1499 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1500 if (metadata->type == CryptoContext) {
1501 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1507 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1508 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1509 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1510 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1511 avcodec_get_name(st->codec->codec_id));
1512 for (k = 0; k < 16; k++) {
1513 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1514 descriptor->essence_codec_ul[k]);
1515 if (!(k+1 & 19) || k == 5)
1516 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1518 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1519 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1520 source_track->intra_only = mxf_is_intra_only(descriptor);
1521 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1522 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1523 st->codec->codec_id = container_ul->id;
1524 st->codec->width = descriptor->width;
1525 st->codec->height = descriptor->height; /* Field height, not frame height */
1526 switch (descriptor->frame_layout) {
1527 case SegmentedFrame:
1528 /* This one is a weird layout I don't fully understand. */
1529 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1532 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1535 /* Every other line is stored and needs to be duplicated. */
1536 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1537 break; /* The correct thing to do here is fall through, but by breaking we might be
1538 able to decode some streams at half the vertical resolution, rather than not al all.
1539 It's also for compatibility with the old behavior. */
1542 case SeparateFields:
1543 st->codec->height *= 2; /* Turn field height into frame height. */
1546 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1548 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1549 st->codec->pix_fmt = descriptor->pix_fmt;
1550 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1551 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1552 &descriptor->essence_codec_ul);
1553 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1554 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1555 /* support files created before RP224v10 by defaulting to UYVY422
1556 if subsampling is 4:2:2 and component depth is 8-bit */
1557 if (descriptor->horiz_subsampling == 2 &&
1558 descriptor->vert_subsampling == 1 &&
1559 descriptor->component_depth == 8) {
1560 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1565 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1566 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1567 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1568 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1569 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))
1570 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1571 st->codec->channels = descriptor->channels;
1572 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1574 if (descriptor->sample_rate.den > 0) {
1575 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1576 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1578 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) found for stream #%d, time base forced to 1/48000\n",
1579 descriptor->sample_rate.num, descriptor->sample_rate.den, st->index);
1580 avpriv_set_pts_info(st, 64, 1, 48000);
1583 /* if duration is set, rescale it from EditRate to SampleRate */
1584 if (st->duration != AV_NOPTS_VALUE)
1585 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
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 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 (klv_read_packet(&klv, s->pb) == 0) {
2215 PRINT_KEY(s, "read packet", klv.key);
2216 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2217 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2218 ret = mxf_decrypt_triplet(s, pkt, &klv);
2220 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2221 return AVERROR_INVALIDDATA;
2225 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2226 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2227 int index = mxf_get_stream_index(s, &klv);
2228 int64_t next_ofs, next_klv;
2231 AVCodecContext *codec;
2234 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2238 st = s->streams[index];
2239 track = st->priv_data;
2241 if (s->streams[index]->discard == AVDISCARD_ALL)
2244 next_klv = avio_tell(s->pb) + klv.length;
2245 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2247 if (next_ofs >= 0 && next_klv > next_ofs) {
2248 /* if this check is hit then it's possible OPAtom was treated as OP1a
2249 * truncate the packet since it's probably very large (>2 GiB is common) */
2250 avpriv_request_sample(s,
2251 "OPAtom misinterpreted as OP1a?"
2252 "KLV for edit unit %i extending into "
2254 mxf->current_edit_unit);
2255 klv.length = next_ofs - avio_tell(s->pb);
2258 /* check for 8 channels AES3 element */
2259 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2260 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2261 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2262 return AVERROR_INVALIDDATA;
2265 ret = av_get_packet(s->pb, pkt, klv.length);
2269 pkt->stream_index = index;
2270 pkt->pos = klv.offset;
2272 codec = s->streams[index]->codec;
2273 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2274 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2275 MXFIndexTable *t = &mxf->index_tables[0];
2277 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2278 pkt->dts = mxf->current_edit_unit + t->first_dts;
2279 pkt->pts = t->ptses[mxf->current_edit_unit];
2280 } else if (track->intra_only) {
2281 /* intra-only -> PTS = EditUnit.
2282 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2283 pkt->pts = mxf->current_edit_unit;
2285 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2286 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2291 /* seek for truncated packets */
2292 avio_seek(s->pb, next_klv, SEEK_SET);
2297 avio_skip(s->pb, klv.length);
2299 return url_feof(s->pb) ? AVERROR_EOF : -1;
2302 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2304 MXFContext *mxf = s->priv_data;
2306 int64_t ret64, pos, next_pos;
2311 if (mxf->op != OPAtom)
2312 return mxf_read_packet_old(s, pkt);
2314 /* OPAtom - clip wrapped demuxing */
2315 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2317 t = &mxf->index_tables[0];
2319 if (mxf->current_edit_unit >= st->duration)
2322 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2324 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2327 /* compute size by finding the next edit unit or the end of the essence container
2328 * not pretty, but it works */
2329 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2330 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2331 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2332 return AVERROR_INVALIDDATA;
2335 if ((size = next_pos - pos) <= 0) {
2336 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2337 return AVERROR_INVALIDDATA;
2340 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2343 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2346 pkt->stream_index = 0;
2348 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2349 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2350 pkt->dts = mxf->current_edit_unit + t->first_dts;
2351 pkt->pts = t->ptses[mxf->current_edit_unit];
2352 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2353 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2358 mxf->current_edit_unit += edit_units;
2363 static int mxf_read_close(AVFormatContext *s)
2365 MXFContext *mxf = s->priv_data;
2366 MXFIndexTableSegment *seg;
2369 av_freep(&mxf->packages_refs);
2371 for (i = 0; i < s->nb_streams; i++)
2372 s->streams[i]->priv_data = NULL;
2374 for (i = 0; i < mxf->metadata_sets_count; i++) {
2375 switch (mxf->metadata_sets[i]->type) {
2377 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2379 case MultipleDescriptor:
2380 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2383 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2386 case MaterialPackage:
2387 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2389 case IndexTableSegment:
2390 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2391 av_freep(&seg->temporal_offset_entries);
2392 av_freep(&seg->flag_entries);
2393 av_freep(&seg->stream_offset_entries);
2398 av_freep(&mxf->metadata_sets[i]);
2400 av_freep(&mxf->partitions);
2401 av_freep(&mxf->metadata_sets);
2402 av_freep(&mxf->aesc);
2403 av_freep(&mxf->local_tags);
2405 if (mxf->index_tables) {
2406 for (i = 0; i < mxf->nb_index_tables; i++) {
2407 av_freep(&mxf->index_tables[i].segments);
2408 av_freep(&mxf->index_tables[i].ptses);
2409 av_freep(&mxf->index_tables[i].fake_index);
2412 av_freep(&mxf->index_tables);
2417 static int mxf_probe(AVProbeData *p) {
2418 const uint8_t *bufp = p->buf;
2419 const uint8_t *end = p->buf + p->buf_size;
2421 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2424 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2425 end -= sizeof(mxf_header_partition_pack_key);
2426 for (; bufp < end; bufp++) {
2427 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2428 return AVPROBE_SCORE_MAX;
2433 /* rudimentary byte seek */
2434 /* XXX: use MXF Index */
2435 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2437 AVStream *st = s->streams[stream_index];
2439 MXFContext* mxf = s->priv_data;
2444 MXFTrack *source_track = st->priv_data;
2446 /* if audio then truncate sample_time to EditRate */
2447 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2448 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2450 if (mxf->nb_index_tables <= 0) {
2452 return AVERROR_INVALIDDATA;
2453 if (sample_time < 0)
2455 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2457 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2459 ff_update_cur_dts(s, st, sample_time);
2460 mxf->current_edit_unit = sample_time;
2462 t = &mxf->index_tables[0];
2464 /* clamp above zero, else ff_index_search_timestamp() returns negative
2465 * this also means we allow seeking before the start */
2466 sample_time = FFMAX(sample_time, 0);
2468 if (t->fake_index) {
2469 /* behave as if we have a proper index */
2470 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2473 /* no IndexEntryArray (one or more CBR segments)
2474 * make sure we don't seek past the end */
2475 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2478 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2481 ff_update_cur_dts(s, st, sample_time);
2482 mxf->current_edit_unit = sample_time;
2483 avio_seek(s->pb, seekpos, SEEK_SET);
2486 // Update all tracks sample count
2487 for (i = 0; i < s->nb_streams; i++) {
2488 AVStream *cur_st = s->streams[i];
2489 MXFTrack *cur_track = cur_st->priv_data;
2490 uint64_t current_sample_count = 0;
2491 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2492 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2496 cur_track->sample_count = current_sample_count;
2502 AVInputFormat ff_mxf_demuxer = {
2504 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2505 .priv_data_size = sizeof(MXFContext),
2506 .read_probe = mxf_probe,
2507 .read_header = mxf_read_header,
2508 .read_packet = mxf_read_packet,
2509 .read_close = mxf_read_close,
2510 .read_seek = mxf_read_seek,