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 last_partition;
217 uint64_t footer_partition;
218 KLVPacket current_klv_data;
219 int current_klv_index;
221 MXFPartition *current_partition;
222 int parsing_backward;
223 int64_t last_forward_tell;
224 int last_forward_partition;
225 int current_edit_unit;
227 MXFIndexTable *index_tables;
228 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
231 enum MXFWrappingScheme {
236 /* NOTE: klv_offset is not set (-1) for local keys */
237 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
241 MXFMetadataReadFunc *read;
243 enum MXFMetadataSetType type;
244 } MXFMetadataReadTableEntry;
246 static int mxf_read_close(AVFormatContext *s);
248 /* partial keys to match */
249 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
250 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
251 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
252 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
253 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
254 /* complete keys to match */
255 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 };
256 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
257 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
258 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 };
259 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
261 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
263 static int64_t klv_decode_ber_length(AVIOContext *pb)
265 uint64_t size = avio_r8(pb);
266 if (size & 0x80) { /* long form */
267 int bytes_num = size & 0x7f;
268 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
270 return AVERROR_INVALIDDATA;
273 size = size << 8 | avio_r8(pb);
278 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
281 for (i = 0; i < size && !url_feof(pb); i++) {
285 else if (b != key[i])
291 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
293 if (!mxf_read_sync(pb, mxf_klv_key, 4))
294 return AVERROR_INVALIDDATA;
295 klv->offset = avio_tell(pb) - 4;
296 memcpy(klv->key, mxf_klv_key, 4);
297 avio_read(pb, klv->key + 4, 12);
298 klv->length = klv_decode_ber_length(pb);
299 return klv->length == -1 ? -1 : 0;
302 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
306 for (i = 0; i < s->nb_streams; i++) {
307 MXFTrack *track = s->streams[i]->priv_data;
309 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
312 /* return 0 if only one stream, for OP Atom files with 0 as track number */
313 return s->nb_streams == 1 ? 0 : -1;
316 /* XXX: use AVBitStreamFilter */
317 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
319 const uint8_t *buf_ptr, *end_ptr;
323 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
324 return AVERROR_INVALIDDATA;
325 length = av_get_packet(pb, pkt, length);
328 data_ptr = pkt->data;
329 end_ptr = pkt->data + length;
330 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
331 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
332 for (i = 0; i < st->codec->channels; i++) {
333 uint32_t sample = bytestream_get_le32(&buf_ptr);
334 if (st->codec->bits_per_coded_sample == 24)
335 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
337 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
339 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
341 av_shrink_packet(pkt, data_ptr - pkt->data);
345 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
347 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
348 MXFContext *mxf = s->priv_data;
349 AVIOContext *pb = s->pb;
350 int64_t end = avio_tell(pb) + klv->length;
353 uint64_t plaintext_size;
358 if (!mxf->aesc && s->key && s->keylen == 16) {
359 mxf->aesc = av_aes_alloc();
361 return AVERROR(ENOMEM);
362 av_aes_init(mxf->aesc, s->key, 128, 1);
365 avio_skip(pb, klv_decode_ber_length(pb));
367 klv_decode_ber_length(pb);
368 plaintext_size = avio_rb64(pb);
370 klv_decode_ber_length(pb);
371 avio_read(pb, klv->key, 16);
372 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
373 return AVERROR_INVALIDDATA;
374 index = mxf_get_stream_index(s, klv);
376 return AVERROR_INVALIDDATA;
378 klv_decode_ber_length(pb);
379 orig_size = avio_rb64(pb);
380 if (orig_size < plaintext_size)
381 return AVERROR_INVALIDDATA;
383 size = klv_decode_ber_length(pb);
384 if (size < 32 || size - 32 < orig_size)
385 return AVERROR_INVALIDDATA;
386 avio_read(pb, ivec, 16);
387 avio_read(pb, tmpbuf, 16);
389 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
390 if (memcmp(tmpbuf, checkv, 16))
391 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
393 size = av_get_packet(pb, pkt, size);
396 else if (size < plaintext_size)
397 return AVERROR_INVALIDDATA;
398 size -= plaintext_size;
400 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
401 &pkt->data[plaintext_size], size >> 4, ivec, 1);
402 av_shrink_packet(pkt, orig_size);
403 pkt->stream_index = index;
404 avio_skip(pb, end - avio_tell(pb));
408 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
410 MXFContext *mxf = arg;
411 int item_num = avio_rb32(pb);
412 int item_len = avio_rb32(pb);
414 if (item_len != 18) {
415 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
416 return AVERROR_PATCHWELCOME;
418 if (item_num > 65536) {
419 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
420 return AVERROR_INVALIDDATA;
422 mxf->local_tags = av_calloc(item_num, item_len);
423 if (!mxf->local_tags)
424 return AVERROR(ENOMEM);
425 mxf->local_tags_count = item_num;
426 avio_read(pb, mxf->local_tags, item_num*item_len);
430 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
432 MXFContext *mxf = arg;
433 MXFPartition *partition, *tmp_part;
435 uint64_t footer_partition;
436 uint32_t nb_essence_containers;
438 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
440 return AVERROR(ENOMEM);
441 mxf->partitions = tmp_part;
443 if (mxf->parsing_backward) {
444 /* insert the new partition pack in the middle
445 * this makes the entries in mxf->partitions sorted by offset */
446 memmove(&mxf->partitions[mxf->last_forward_partition+1],
447 &mxf->partitions[mxf->last_forward_partition],
448 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
449 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
451 mxf->last_forward_partition++;
452 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
455 memset(partition, 0, sizeof(*partition));
456 mxf->partitions_count++;
457 partition->pack_length = avio_tell(pb) - klv_offset + size;
461 partition->type = Header;
464 partition->type = BodyPartition;
467 partition->type = Footer;
470 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
471 return AVERROR_INVALIDDATA;
474 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
475 partition->closed = partition->type == Footer || !(uid[14] & 1);
476 partition->complete = uid[14] > 2;
478 partition->kag_size = avio_rb32(pb);
479 partition->this_partition = avio_rb64(pb);
480 partition->previous_partition = avio_rb64(pb);
481 footer_partition = avio_rb64(pb);
482 partition->header_byte_count = avio_rb64(pb);
483 partition->index_byte_count = avio_rb64(pb);
484 partition->index_sid = avio_rb32(pb);
486 partition->body_sid = avio_rb32(pb);
487 avio_read(pb, op, sizeof(UID));
488 nb_essence_containers = avio_rb32(pb);
490 /* some files don'thave FooterPartition set in every partition */
491 if (footer_partition) {
492 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
493 av_log(mxf->fc, AV_LOG_ERROR,
494 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
495 mxf->footer_partition, footer_partition);
497 mxf->footer_partition = footer_partition;
502 "PartitionPack: ThisPartition = 0x%"PRIX64
503 ", PreviousPartition = 0x%"PRIX64", "
504 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
505 partition->this_partition,
506 partition->previous_partition, footer_partition,
507 partition->index_sid, partition->body_sid);
509 /* sanity check PreviousPartition if set */
510 if (partition->previous_partition &&
511 mxf->run_in + partition->previous_partition >= klv_offset) {
512 av_log(mxf->fc, AV_LOG_ERROR,
513 "PreviousPartition points to this partition or forward\n");
514 return AVERROR_INVALIDDATA;
517 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
518 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
519 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
520 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
521 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
522 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
523 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
524 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
525 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
526 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
527 else if (op[12] == 0x10) {
528 /* SMPTE 390m: "There shall be exactly one essence container"
529 * The following block deals with files that violate this, namely:
530 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
531 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
532 if (nb_essence_containers != 1) {
533 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
537 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
538 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
544 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
548 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
549 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
551 if (mxf->op == OPSONYOpt)
552 partition->kag_size = 512;
554 partition->kag_size = 1;
556 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
562 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
564 MXFMetadataSet **tmp;
566 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
568 return AVERROR(ENOMEM);
569 mxf->metadata_sets = tmp;
570 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
571 mxf->metadata_sets_count++;
575 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
577 MXFCryptoContext *cryptocontext = arg;
579 return AVERROR_INVALIDDATA;
580 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
581 avio_read(pb, cryptocontext->source_container_ul, 16);
585 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
587 MXFContext *mxf = arg;
590 mxf->packages_count = avio_rb32(pb);
591 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
592 if (!mxf->packages_refs)
593 return AVERROR(ENOMEM);
594 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
595 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
601 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
603 MXFStructuralComponent *source_clip = arg;
606 source_clip->duration = avio_rb64(pb);
609 source_clip->start_position = avio_rb64(pb);
612 /* UMID, only get last 16 bytes */
614 avio_read(pb, source_clip->source_package_uid, 16);
617 source_clip->source_track_id = avio_rb32(pb);
623 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
625 MXFPackage *package = arg;
628 package->tracks_count = avio_rb32(pb);
629 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
630 if (!package->tracks_refs)
631 return AVERROR(ENOMEM);
632 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
633 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
639 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
641 MXFTimecodeComponent *mxf_timecode = arg;
644 mxf_timecode->start_frame = avio_rb64(pb);
647 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
650 mxf_timecode->drop_frame = avio_r8(pb);
656 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
658 MXFTrack *track = arg;
661 track->track_id = avio_rb32(pb);
664 avio_read(pb, track->track_number, 4);
667 track->edit_rate.num = avio_rb32(pb);
668 track->edit_rate.den = avio_rb32(pb);
671 avio_read(pb, track->sequence_ref, 16);
677 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
679 MXFSequence *sequence = arg;
682 sequence->duration = avio_rb64(pb);
685 avio_read(pb, sequence->data_definition_ul, 16);
688 sequence->structural_components_count = avio_rb32(pb);
689 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
690 if (!sequence->structural_components_refs)
691 return AVERROR(ENOMEM);
692 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
693 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
699 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
701 MXFPackage *package = arg;
704 package->tracks_count = avio_rb32(pb);
705 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
706 if (!package->tracks_refs)
707 return AVERROR(ENOMEM);
708 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
709 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
712 /* UMID, only get last 16 bytes */
714 avio_read(pb, package->package_uid, 16);
717 avio_read(pb, package->descriptor_ref, 16);
723 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
727 segment->nb_index_entries = avio_rb32(pb);
729 length = avio_rb32(pb);
731 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
732 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
733 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
734 return AVERROR(ENOMEM);
736 for (i = 0; i < segment->nb_index_entries; i++) {
737 segment->temporal_offset_entries[i] = avio_r8(pb);
738 avio_r8(pb); /* KeyFrameOffset */
739 segment->flag_entries[i] = avio_r8(pb);
740 segment->stream_offset_entries[i] = avio_rb64(pb);
741 avio_skip(pb, length - 11);
746 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
748 MXFIndexTableSegment *segment = arg;
751 segment->edit_unit_byte_count = avio_rb32(pb);
752 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
755 segment->index_sid = avio_rb32(pb);
756 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
759 segment->body_sid = avio_rb32(pb);
760 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
763 av_dlog(NULL, "IndexEntryArray found\n");
764 return mxf_read_index_entry_array(pb, segment);
766 segment->index_edit_rate.num = avio_rb32(pb);
767 segment->index_edit_rate.den = avio_rb32(pb);
768 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
769 segment->index_edit_rate.den);
772 segment->index_start_position = avio_rb64(pb);
773 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
776 segment->index_duration = avio_rb64(pb);
777 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
783 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
785 int code, value, ofs = 0;
786 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
791 av_dlog(NULL, "pixel layout: code %#x\n", code);
794 layout[ofs++] = code;
795 layout[ofs++] = value;
797 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
798 } while (code != 0); /* SMPTE 377M E.2.46 */
800 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
803 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
805 MXFDescriptor *descriptor = arg;
806 descriptor->pix_fmt = AV_PIX_FMT_NONE;
809 descriptor->sub_descriptors_count = avio_rb32(pb);
810 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
811 if (!descriptor->sub_descriptors_refs)
812 return AVERROR(ENOMEM);
813 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
814 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
817 avio_read(pb, descriptor->essence_container_ul, 16);
820 descriptor->linked_track_id = avio_rb32(pb);
822 case 0x3201: /* PictureEssenceCoding */
823 avio_read(pb, descriptor->essence_codec_ul, 16);
826 descriptor->width = avio_rb32(pb);
829 descriptor->height = avio_rb32(pb);
832 descriptor->frame_layout = avio_r8(pb);
835 descriptor->aspect_ratio.num = avio_rb32(pb);
836 descriptor->aspect_ratio.den = avio_rb32(pb);
839 descriptor->field_dominance = avio_r8(pb);
842 descriptor->component_depth = avio_rb32(pb);
845 descriptor->horiz_subsampling = avio_rb32(pb);
848 descriptor->vert_subsampling = avio_rb32(pb);
851 descriptor->sample_rate.num = avio_rb32(pb);
852 descriptor->sample_rate.den = avio_rb32(pb);
854 case 0x3D06: /* SoundEssenceCompression */
855 avio_read(pb, descriptor->essence_codec_ul, 16);
858 descriptor->channels = avio_rb32(pb);
861 descriptor->bits_per_sample = avio_rb32(pb);
864 mxf_read_pixel_layout(pb, descriptor);
867 /* Private uid used by SONY C0023S01.mxf */
868 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
869 if (descriptor->extradata)
870 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
871 av_free(descriptor->extradata);
872 descriptor->extradata_size = 0;
873 descriptor->extradata = av_malloc(size);
874 if (!descriptor->extradata)
875 return AVERROR(ENOMEM);
876 descriptor->extradata_size = size;
877 avio_read(pb, descriptor->extradata, size);
885 * Match an uid independently of the version byte and up to len common bytes
888 static int mxf_match_uid(const UID key, const UID uid, int len)
891 for (i = 0; i < len; i++) {
892 if (i != 7 && key[i] != uid[i])
898 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
900 while (uls->uid[0]) {
901 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
908 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
914 for (i = 0; i < mxf->metadata_sets_count; i++) {
915 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
916 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
917 return mxf->metadata_sets[i];
923 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
924 // video essence container uls
925 { { 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 */
926 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
927 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
928 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
931 /* EC ULs for intra-only formats */
932 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
933 { { 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 */
934 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
937 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
938 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
939 { { 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 */
940 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
941 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
944 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
945 // sound essence container uls
946 { { 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 */
947 { { 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 */
948 { { 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 */
949 { { 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 */
950 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
953 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
955 int i, j, nb_segments = 0;
956 MXFIndexTableSegment **unsorted_segments;
957 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
959 /* count number of segments, allocate arrays and copy unsorted segments */
960 for (i = 0; i < mxf->metadata_sets_count; i++)
961 if (mxf->metadata_sets[i]->type == IndexTableSegment)
965 return AVERROR_INVALIDDATA;
967 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
968 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
969 av_freep(sorted_segments);
970 av_free(unsorted_segments);
971 return AVERROR(ENOMEM);
974 for (i = j = 0; i < mxf->metadata_sets_count; i++)
975 if (mxf->metadata_sets[i]->type == IndexTableSegment)
976 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
978 *nb_sorted_segments = 0;
980 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
981 for (i = 0; i < nb_segments; i++) {
982 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
983 uint64_t best_index_duration = 0;
985 for (j = 0; j < nb_segments; j++) {
986 MXFIndexTableSegment *s = unsorted_segments[j];
988 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
989 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
990 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
992 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
993 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
994 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
996 best_body_sid = s->body_sid;
997 best_index_sid = s->index_sid;
998 best_index_start = s->index_start_position;
999 best_index_duration = s->index_duration;
1003 /* no suitable entry found -> we're done */
1007 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1008 last_body_sid = best_body_sid;
1009 last_index_sid = best_index_sid;
1010 last_index_start = best_index_start;
1013 av_free(unsorted_segments);
1019 * Computes the absolute file offset of the given essence container offset
1021 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1024 int64_t offset_in = offset; /* for logging */
1026 for (x = 0; x < mxf->partitions_count; x++) {
1027 MXFPartition *p = &mxf->partitions[x];
1029 if (p->body_sid != body_sid)
1032 if (offset < p->essence_length || !p->essence_length) {
1033 *offset_out = p->essence_offset + offset;
1037 offset -= p->essence_length;
1040 av_log(mxf->fc, AV_LOG_ERROR,
1041 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1042 offset_in, body_sid);
1044 return AVERROR_INVALIDDATA;
1048 * Returns the end position of the essence container with given BodySID, or zero if unknown
1050 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1055 for (x = 0; x < mxf->partitions_count; x++) {
1056 MXFPartition *p = &mxf->partitions[x];
1058 if (p->body_sid != body_sid)
1061 if (!p->essence_length)
1064 ret = p->essence_offset + p->essence_length;
1070 /* EditUnit -> absolute offset */
1071 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)
1074 int64_t offset_temp = 0;
1076 for (i = 0; i < index_table->nb_segments; i++) {
1077 MXFIndexTableSegment *s = index_table->segments[i];
1079 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1081 if (edit_unit < s->index_start_position + s->index_duration) {
1082 int64_t index = edit_unit - s->index_start_position;
1084 if (s->edit_unit_byte_count)
1085 offset_temp += s->edit_unit_byte_count * index;
1086 else if (s->nb_index_entries) {
1087 if (s->nb_index_entries == 2 * s->index_duration + 1)
1088 index *= 2; /* Avid index */
1090 if (index < 0 || index >= s->nb_index_entries) {
1091 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1092 index_table->index_sid, s->index_start_position);
1093 return AVERROR_INVALIDDATA;
1096 offset_temp = s->stream_offset_entries[index];
1098 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1099 index_table->index_sid, s->index_start_position);
1100 return AVERROR_INVALIDDATA;
1104 *edit_unit_out = edit_unit;
1106 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1108 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1109 offset_temp += s->edit_unit_byte_count * s->index_duration;
1114 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);
1116 return AVERROR_INVALIDDATA;
1119 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1122 int8_t max_temporal_offset = -128;
1124 /* first compute how many entries we have */
1125 for (i = 0; i < index_table->nb_segments; i++) {
1126 MXFIndexTableSegment *s = index_table->segments[i];
1128 if (!s->nb_index_entries) {
1129 index_table->nb_ptses = 0;
1130 return 0; /* no TemporalOffsets */
1133 index_table->nb_ptses += s->index_duration;
1136 /* paranoid check */
1137 if (index_table->nb_ptses <= 0)
1140 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1141 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1142 av_freep(&index_table->ptses);
1143 return AVERROR(ENOMEM);
1146 /* we may have a few bad TemporalOffsets
1147 * make sure the corresponding PTSes don't have the bogus value 0 */
1148 for (x = 0; x < index_table->nb_ptses; x++)
1149 index_table->ptses[x] = AV_NOPTS_VALUE;
1163 * We want to transform it into this:
1174 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1175 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1176 * The latter makes DTS <= PTS.
1178 for (i = x = 0; i < index_table->nb_segments; i++) {
1179 MXFIndexTableSegment *s = index_table->segments[i];
1180 int index_delta = 1;
1181 int n = s->nb_index_entries;
1183 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1184 index_delta = 2; /* Avid index */
1185 /* ignore the last entry - it's the size of the essence container */
1189 for (j = 0; j < n; j += index_delta, x++) {
1190 int offset = s->temporal_offset_entries[j] / index_delta;
1191 int index = x + offset;
1193 if (x >= index_table->nb_ptses) {
1194 av_log(mxf->fc, AV_LOG_ERROR,
1195 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1196 s->nb_index_entries, s->index_duration);
1200 index_table->fake_index[x].timestamp = x;
1201 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1203 if (index < 0 || index >= index_table->nb_ptses) {
1204 av_log(mxf->fc, AV_LOG_ERROR,
1205 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1210 index_table->ptses[index] = x;
1211 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1215 index_table->first_dts = -max_temporal_offset;
1221 * Sorts and collects index table segments into index tables.
1222 * Also computes PTSes if possible.
1224 static int mxf_compute_index_tables(MXFContext *mxf)
1226 int i, j, k, ret, nb_sorted_segments;
1227 MXFIndexTableSegment **sorted_segments = NULL;
1229 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1230 nb_sorted_segments <= 0) {
1231 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1235 /* sanity check and count unique BodySIDs/IndexSIDs */
1236 for (i = 0; i < nb_sorted_segments; i++) {
1237 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1238 mxf->nb_index_tables++;
1239 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1240 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1241 ret = AVERROR_INVALIDDATA;
1242 goto finish_decoding_index;
1246 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1247 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1248 ret = AVERROR(ENOMEM);
1249 goto finish_decoding_index;
1252 /* distribute sorted segments to index tables */
1253 for (i = j = 0; i < nb_sorted_segments; i++) {
1254 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1259 mxf->index_tables[j].nb_segments++;
1262 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1263 MXFIndexTable *t = &mxf->index_tables[j];
1265 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1266 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1267 ret = AVERROR(ENOMEM);
1268 goto finish_decoding_index;
1271 if (sorted_segments[i]->index_start_position)
1272 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1273 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1275 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1276 t->index_sid = sorted_segments[i]->index_sid;
1277 t->body_sid = sorted_segments[i]->body_sid;
1279 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1280 goto finish_decoding_index;
1282 /* fix zero IndexDurations */
1283 for (k = 0; k < t->nb_segments; k++) {
1284 if (t->segments[k]->index_duration)
1287 if (t->nb_segments > 1)
1288 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1291 if (mxf->fc->nb_streams <= 0) {
1292 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1296 /* assume the first stream's duration is reasonable
1297 * leave index_duration = 0 on further segments in case we have any (unlikely)
1299 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1305 finish_decoding_index:
1306 av_free(sorted_segments);
1310 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1312 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1313 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1314 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1315 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1318 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1320 char buf[AV_TIMECODE_STR_SIZE];
1321 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1326 static int mxf_parse_structural_metadata(MXFContext *mxf)
1328 MXFPackage *material_package = NULL;
1329 MXFPackage *temp_package = NULL;
1332 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1333 /* TODO: handle multiple material packages (OP3x) */
1334 for (i = 0; i < mxf->packages_count; i++) {
1335 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1336 if (material_package) break;
1338 if (!material_package) {
1339 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1340 return AVERROR_INVALIDDATA;
1343 for (i = 0; i < material_package->tracks_count; i++) {
1344 MXFPackage *source_package = NULL;
1345 MXFTrack *material_track = NULL;
1346 MXFTrack *source_track = NULL;
1347 MXFTrack *temp_track = NULL;
1348 MXFDescriptor *descriptor = NULL;
1349 MXFStructuralComponent *component = NULL;
1350 MXFTimecodeComponent *mxf_tc = NULL;
1351 UID *essence_container_ul = NULL;
1352 const MXFCodecUL *codec_ul = NULL;
1353 const MXFCodecUL *container_ul = NULL;
1354 const MXFCodecUL *pix_fmt_ul = NULL;
1359 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1360 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1364 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1365 mxf_tc = (MXFTimecodeComponent*)component;
1366 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1367 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1368 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1372 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1373 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1377 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1378 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1382 mxf_tc = (MXFTimecodeComponent*)component;
1383 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1384 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1385 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1390 /* TODO: handle multiple source clips */
1391 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1392 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1396 for (k = 0; k < mxf->packages_count; k++) {
1397 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1400 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1401 source_package = temp_package;
1405 if (!source_package) {
1406 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1409 for (k = 0; k < source_package->tracks_count; k++) {
1410 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1411 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1412 ret = AVERROR_INVALIDDATA;
1415 if (temp_track->track_id == component->source_track_id) {
1416 source_track = temp_track;
1420 if (!source_track) {
1421 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1425 if (!source_track || !component)
1428 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1429 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1430 ret = AVERROR_INVALIDDATA;
1434 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1435 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1436 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1437 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1441 st = avformat_new_stream(mxf->fc, NULL);
1443 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1444 ret = AVERROR(ENOMEM);
1447 st->id = source_track->track_id;
1448 st->priv_data = source_track;
1449 source_track->original_duration = st->duration = component->duration;
1450 if (st->duration == -1)
1451 st->duration = AV_NOPTS_VALUE;
1452 st->start_time = component->start_position;
1453 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1454 av_log(mxf->fc, AV_LOG_WARNING,
1455 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1456 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1457 material_track->edit_rate = (AVRational){25, 1};
1459 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1461 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1462 source_track->edit_rate = material_track->edit_rate;
1464 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1465 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1466 st->codec->codec_type = codec_ul->id;
1468 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1469 if (source_package->descriptor) {
1470 if (source_package->descriptor->type == MultipleDescriptor) {
1471 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1472 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1474 if (!sub_descriptor) {
1475 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1478 if (sub_descriptor->linked_track_id == source_track->track_id) {
1479 descriptor = sub_descriptor;
1483 } else if (source_package->descriptor->type == Descriptor)
1484 descriptor = source_package->descriptor;
1487 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1490 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1491 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1492 essence_container_ul = &descriptor->essence_container_ul;
1493 /* HACK: replacing the original key with mxf_encrypted_essence_container
1494 * is not allowed according to s429-6, try to find correct information anyway */
1495 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1496 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1497 for (k = 0; k < mxf->metadata_sets_count; k++) {
1498 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1499 if (metadata->type == CryptoContext) {
1500 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1506 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1507 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1508 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1509 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1510 avcodec_get_name(st->codec->codec_id));
1511 for (k = 0; k < 16; k++) {
1512 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1513 descriptor->essence_codec_ul[k]);
1514 if (!(k+1 & 19) || k == 5)
1515 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1517 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1518 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1519 source_track->intra_only = mxf_is_intra_only(descriptor);
1520 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1521 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1522 st->codec->codec_id = container_ul->id;
1523 st->codec->width = descriptor->width;
1524 st->codec->height = descriptor->height; /* Field height, not frame height */
1525 switch (descriptor->frame_layout) {
1526 case SegmentedFrame:
1527 /* This one is a weird layout I don't fully understand. */
1528 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1531 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1534 /* Every other line is stored and needs to be duplicated. */
1535 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1536 break; /* The correct thing to do here is fall through, but by breaking we might be
1537 able to decode some streams at half the vertical resolution, rather than not al all.
1538 It's also for compatibility with the old behavior. */
1541 case SeparateFields:
1542 st->codec->height *= 2; /* Turn field height into frame height. */
1545 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1547 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1548 st->codec->pix_fmt = descriptor->pix_fmt;
1549 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1550 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1551 &descriptor->essence_codec_ul);
1552 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1553 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1554 /* support files created before RP224v10 by defaulting to UYVY422
1555 if subsampling is 4:2:2 and component depth is 8-bit */
1556 if (descriptor->horiz_subsampling == 2 &&
1557 descriptor->vert_subsampling == 1 &&
1558 descriptor->component_depth == 8) {
1559 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1564 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1565 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1566 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1567 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1568 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))
1569 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1570 st->codec->channels = descriptor->channels;
1571 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1573 if (descriptor->sample_rate.den > 0) {
1574 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1575 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1577 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1578 "found for stream #%d, time base forced to 1/48000\n",
1579 descriptor->sample_rate.num, descriptor->sample_rate.den,
1581 avpriv_set_pts_info(st, 64, 1, 48000);
1584 /* if duration is set, rescale it from EditRate to SampleRate */
1585 if (st->duration != AV_NOPTS_VALUE)
1586 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1588 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1589 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1590 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1591 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1592 else if (descriptor->bits_per_sample == 32)
1593 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1594 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1595 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1596 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1597 else if (descriptor->bits_per_sample == 32)
1598 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1599 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1600 st->need_parsing = AVSTREAM_PARSE_FULL;
1603 if (descriptor->extradata) {
1604 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1605 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1607 } else if(st->codec->codec_id == AV_CODEC_ID_H264) {
1608 ff_generate_avci_extradata(st);
1610 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1611 /* TODO: decode timestamps */
1612 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1621 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1627 return AVERROR(EINVAL);
1629 buf_size = size + size/2 + 1;
1630 *str = av_malloc(buf_size);
1632 return AVERROR(ENOMEM);
1634 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1642 static int mxf_uid_to_str(UID uid, char **str)
1646 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1648 return AVERROR(ENOMEM);
1649 for (i = 0; i < sizeof(UID); i++) {
1650 snprintf(p, 2 + 1, "%.2x", uid[i]);
1652 if (i == 3 || i == 5 || i == 7 || i == 9) {
1653 snprintf(p, 1 + 1, "-");
1660 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1662 struct tm time = {0};
1663 time.tm_year = (timestamp >> 48) - 1900;
1664 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1665 time.tm_mday = (timestamp >> 32 & 0xFF);
1666 time.tm_hour = (timestamp >> 24 & 0xFF);
1667 time.tm_min = (timestamp >> 16 & 0xFF);
1668 time.tm_sec = (timestamp >> 8 & 0xFF);
1670 /* ensure month/day are valid */
1671 time.tm_mon = FFMAX(time.tm_mon, 0);
1672 time.tm_mday = FFMAX(time.tm_mday, 1);
1674 *str = av_mallocz(32);
1676 return AVERROR(ENOMEM);
1677 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1682 #define SET_STR_METADATA(pb, name, str) do { \
1683 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1685 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1688 #define SET_UID_METADATA(pb, name, var, str) do { \
1689 avio_read(pb, var, 16); \
1690 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1692 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1695 #define SET_TS_METADATA(pb, name, var, str) do { \
1696 var = avio_rb64(pb); \
1697 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1699 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1702 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1704 MXFContext *mxf = arg;
1705 AVFormatContext *s = mxf->fc;
1712 SET_STR_METADATA(pb, "company_name", str);
1715 SET_STR_METADATA(pb, "product_name", str);
1718 SET_STR_METADATA(pb, "product_version", str);
1721 SET_UID_METADATA(pb, "product_uid", uid, str);
1724 SET_TS_METADATA(pb, "modification_date", ts, str);
1727 SET_STR_METADATA(pb, "application_platform", str);
1730 SET_UID_METADATA(pb, "generation_uid", uid, str);
1733 SET_UID_METADATA(pb, "uid", uid, str);
1739 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1740 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1758 { { 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 */
1759 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1761 { { 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 */
1762 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1766 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1767 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1768 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1769 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1772 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1774 AVIOContext *pb = mxf->fc->pb;
1775 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1776 uint64_t klv_end = avio_tell(pb) + klv->length;
1779 return AVERROR(ENOMEM);
1780 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1782 int tag = avio_rb16(pb);
1783 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1784 uint64_t next = avio_tell(pb) + size;
1787 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1788 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1789 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1792 if (tag > 0x7FFF) { /* dynamic tag */
1794 for (i = 0; i < mxf->local_tags_count; i++) {
1795 int local_tag = AV_RB16(mxf->local_tags+i*18);
1796 if (local_tag == tag) {
1797 memcpy(uid, mxf->local_tags+i*18+2, 16);
1798 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1799 PRINT_KEY(mxf->fc, "uid", uid);
1803 if (ctx_size && tag == 0x3C0A)
1804 avio_read(pb, ctx->uid, 16);
1805 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1808 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1809 * it extending past the end of the KLV though (zzuf5.mxf). */
1810 if (avio_tell(pb) > klv_end) {
1814 av_log(mxf->fc, AV_LOG_ERROR,
1815 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1817 return AVERROR_INVALIDDATA;
1818 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1819 avio_seek(pb, next, SEEK_SET);
1821 if (ctx_size) ctx->type = type;
1822 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1826 * Seeks to the previous partition, if possible
1827 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1829 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1831 AVIOContext *pb = mxf->fc->pb;
1833 if (!mxf->current_partition ||
1834 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1835 return 0; /* we've parsed all partitions */
1837 /* seek to previous partition */
1838 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1839 mxf->current_partition = NULL;
1841 av_dlog(mxf->fc, "seeking to previous partition\n");
1847 * Called when essence is encountered
1848 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1850 static int mxf_parse_handle_essence(MXFContext *mxf)
1852 AVIOContext *pb = mxf->fc->pb;
1855 if (mxf->parsing_backward) {
1856 return mxf_seek_to_previous_partition(mxf);
1857 } else if (mxf->footer_partition || mxf->last_partition){
1860 offset = mxf->footer_partition ? mxf->footer_partition : mxf->last_partition;
1862 av_dlog(mxf->fc, "seeking to last partition\n");
1864 /* remember where we were so we don't end up seeking further back than this */
1865 mxf->last_forward_tell = avio_tell(pb);
1867 if (!pb->seekable) {
1868 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1872 /* seek to last partition and parse backward */
1873 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1874 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to last partition @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1875 mxf->run_in + offset, ret);
1879 mxf->current_partition = NULL;
1880 mxf->parsing_backward = 1;
1882 av_dlog(mxf->fc, "can't find last partition\n");
1890 * Called when the next partition or EOF is encountered
1891 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1893 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1895 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1899 * Figures out the proper offset and length of the essence container in each partition
1901 static void mxf_compute_essence_containers(MXFContext *mxf)
1905 /* everything is already correct */
1906 if (mxf->op == OPAtom)
1909 for (x = 0; x < mxf->partitions_count; x++) {
1910 MXFPartition *p = &mxf->partitions[x];
1913 continue; /* BodySID == 0 -> no essence */
1915 if (x >= mxf->partitions_count - 1)
1916 break; /* last partition - can't compute length (and we don't need to) */
1918 /* essence container spans to the next partition */
1919 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1921 if (p->essence_length < 0) {
1922 /* next ThisPartition < essence_offset */
1923 p->essence_length = 0;
1924 av_log(mxf->fc, AV_LOG_ERROR,
1925 "partition %i: bad ThisPartition = %"PRIX64"\n",
1926 x+1, mxf->partitions[x+1].this_partition);
1931 static int64_t round_to_kag(int64_t position, int kag_size)
1933 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1934 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1935 int64_t ret = (position / kag_size) * kag_size;
1936 return ret == position ? ret : ret + kag_size;
1939 static int is_pcm(enum AVCodecID codec_id)
1941 /* we only care about "normal" PCM codecs until we get samples */
1942 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1946 * Deal with the case where for some audio atoms EditUnitByteCount is
1947 * very small (2, 4..). In those cases we should read more than one
1948 * sample per call to mxf_read_packet().
1950 static void mxf_handle_small_eubc(AVFormatContext *s)
1952 MXFContext *mxf = s->priv_data;
1954 /* assuming non-OPAtom == frame wrapped
1955 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1956 if (mxf->op != OPAtom)
1959 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1960 if (s->nb_streams != 1 ||
1961 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1962 !is_pcm(s->streams[0]->codec->codec_id) ||
1963 mxf->nb_index_tables != 1 ||
1964 mxf->index_tables[0].nb_segments != 1 ||
1965 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1968 /* arbitrarily default to 48 kHz PAL audio frame size */
1969 /* TODO: We could compute this from the ratio between the audio
1970 * and video edit rates for 48 kHz NTSC we could use the
1971 * 1802-1802-1802-1802-1801 pattern. */
1972 mxf->edit_units_per_packet = 1920;
1975 static void mxf_read_random_index_pack(AVFormatContext *s)
1977 MXFContext *mxf = s->priv_data;
1982 if (!s->pb->seekable)
1985 file_size = avio_size(s->pb);
1986 avio_seek(s->pb, file_size - 4, SEEK_SET);
1987 length = avio_rb32(s->pb);
1988 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
1990 avio_seek(s->pb, file_size - length, SEEK_SET);
1991 if (klv_read_packet(&klv, s->pb) < 0 ||
1992 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
1993 klv.length != length - 20)
1996 avio_skip(s->pb, klv.length - 12);
1997 mxf->last_partition = avio_rb64(s->pb);
2000 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2003 static int mxf_read_header(AVFormatContext *s)
2005 MXFContext *mxf = s->priv_data;
2007 int64_t essence_offset = 0;
2010 mxf->last_forward_tell = INT64_MAX;
2011 mxf->edit_units_per_packet = 1;
2013 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2014 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2015 return AVERROR_INVALIDDATA;
2017 avio_seek(s->pb, -14, SEEK_CUR);
2019 mxf->run_in = avio_tell(s->pb);
2021 mxf_read_random_index_pack(s);
2023 while (!url_feof(s->pb)) {
2024 const MXFMetadataReadTableEntry *metadata;
2026 if (klv_read_packet(&klv, s->pb) < 0) {
2027 /* EOF - seek to previous partition or stop */
2028 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2034 PRINT_KEY(s, "read header", klv.key);
2035 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2036 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2037 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2038 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2039 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2041 if (!mxf->current_partition) {
2042 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2043 return AVERROR_INVALIDDATA;
2046 if (!mxf->current_partition->essence_offset) {
2047 /* for OP1a we compute essence_offset
2048 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2049 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2050 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2052 int64_t op1a_essence_offset =
2053 round_to_kag(mxf->current_partition->this_partition +
2054 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2055 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2056 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2058 if (mxf->op == OPAtom) {
2059 /* point essence_offset to the actual data
2060 * OPAtom has all the essence in one big KLV
2062 mxf->current_partition->essence_offset = avio_tell(s->pb);
2063 mxf->current_partition->essence_length = klv.length;
2065 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2066 mxf->current_partition->essence_offset = op1a_essence_offset;
2070 if (!essence_offset)
2071 essence_offset = klv.offset;
2073 /* seek to footer, previous partition or stop */
2074 if (mxf_parse_handle_essence(mxf) <= 0)
2077 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2078 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2079 /* next partition pack - keep going, seek to previous partition or stop */
2080 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2082 else if (mxf->parsing_backward)
2084 /* we're still parsing forward. proceed to parsing this partition pack */
2087 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2088 if (IS_KLV_KEY(klv.key, metadata->key)) {
2090 if (klv.key[5] == 0x53) {
2091 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2093 uint64_t next = avio_tell(s->pb) + klv.length;
2094 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2096 /* only seek forward, else this can loop for a long time */
2097 if (avio_tell(s->pb) > next) {
2098 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2100 return AVERROR_INVALIDDATA;
2103 avio_seek(s->pb, next, SEEK_SET);
2106 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2112 if (!metadata->read)
2113 avio_skip(s->pb, klv.length);
2115 /* FIXME avoid seek */
2116 if (!essence_offset) {
2117 av_log(s, AV_LOG_ERROR, "no essence\n");
2118 return AVERROR_INVALIDDATA;
2120 avio_seek(s->pb, essence_offset, SEEK_SET);
2122 mxf_compute_essence_containers(mxf);
2124 /* we need to do this before computing the index tables
2125 * to be able to fill in zero IndexDurations with st->duration */
2126 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2129 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2132 if (mxf->nb_index_tables > 1) {
2133 /* TODO: look up which IndexSID to use via EssenceContainerData */
2134 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2135 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2136 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2137 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2138 ret = AVERROR_INVALIDDATA;
2142 mxf_handle_small_eubc(s);
2152 * Sets mxf->current_edit_unit based on what offset we're currently at.
2153 * @return next_ofs if OK, <0 on error
2155 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2157 int64_t last_ofs = -1, next_ofs = -1;
2158 MXFIndexTable *t = &mxf->index_tables[0];
2160 /* this is called from the OP1a demuxing logic, which means there
2161 * may be no index tables */
2162 if (mxf->nb_index_tables <= 0)
2165 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2166 while (mxf->current_edit_unit >= 0) {
2167 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2170 if (next_ofs <= last_ofs) {
2171 /* large next_ofs didn't change or current_edit_unit wrapped
2172 * around this fixes the infinite loop on zzuf3.mxf */
2173 av_log(mxf->fc, AV_LOG_ERROR,
2174 "next_ofs didn't change. not deriving packet timestamps\n");
2178 if (next_ofs > current_offset)
2181 last_ofs = next_ofs;
2182 mxf->current_edit_unit++;
2185 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2186 if (mxf->current_edit_unit < 0)
2192 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2194 int i, total = 0, size = 0;
2195 AVStream *st = mxf->fc->streams[stream_index];
2196 MXFTrack *track = st->priv_data;
2197 AVRational time_base = av_inv_q(track->edit_rate);
2198 AVRational sample_rate = av_inv_q(st->time_base);
2199 const MXFSamplesPerFrame *spf = NULL;
2201 if ((sample_rate.num / sample_rate.den) == 48000)
2202 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2204 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2205 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2206 av_mul_q(sample_rate, time_base)));
2208 av_log(mxf->fc, AV_LOG_WARNING,
2209 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2210 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2214 while (spf->samples_per_frame[size]) {
2215 total += spf->samples_per_frame[size];
2221 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2222 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2223 *sample_count += spf->samples_per_frame[i];
2229 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2231 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2232 pkt->pts = track->sample_count;
2233 if ( codec->channels <= 0
2234 || av_get_bits_per_sample(codec->codec_id) <= 0
2235 || codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8)
2236 return AVERROR(EINVAL);
2237 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2241 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2244 MXFContext *mxf = s->priv_data;
2246 while (klv_read_packet(&klv, s->pb) == 0) {
2248 PRINT_KEY(s, "read packet", klv.key);
2249 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2250 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2251 ret = mxf_decrypt_triplet(s, pkt, &klv);
2253 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2254 return AVERROR_INVALIDDATA;
2258 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2259 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2260 int index = mxf_get_stream_index(s, &klv);
2261 int64_t next_ofs, next_klv;
2264 AVCodecContext *codec;
2267 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2271 st = s->streams[index];
2272 track = st->priv_data;
2274 if (s->streams[index]->discard == AVDISCARD_ALL)
2277 next_klv = avio_tell(s->pb) + klv.length;
2278 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2280 if (next_ofs >= 0 && next_klv > next_ofs) {
2281 /* if this check is hit then it's possible OPAtom was treated as OP1a
2282 * truncate the packet since it's probably very large (>2 GiB is common) */
2283 avpriv_request_sample(s,
2284 "OPAtom misinterpreted as OP1a?"
2285 "KLV for edit unit %i extending into "
2287 mxf->current_edit_unit);
2288 klv.length = next_ofs - avio_tell(s->pb);
2291 /* check for 8 channels AES3 element */
2292 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2293 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2294 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2295 return AVERROR_INVALIDDATA;
2298 ret = av_get_packet(s->pb, pkt, klv.length);
2302 pkt->stream_index = index;
2303 pkt->pos = klv.offset;
2305 codec = s->streams[index]->codec;
2306 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2307 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2308 MXFIndexTable *t = &mxf->index_tables[0];
2310 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2311 pkt->dts = mxf->current_edit_unit + t->first_dts;
2312 pkt->pts = t->ptses[mxf->current_edit_unit];
2313 } else if (track->intra_only) {
2314 /* intra-only -> PTS = EditUnit.
2315 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2316 pkt->pts = mxf->current_edit_unit;
2318 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2319 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2324 /* seek for truncated packets */
2325 avio_seek(s->pb, next_klv, SEEK_SET);
2330 avio_skip(s->pb, klv.length);
2332 return url_feof(s->pb) ? AVERROR_EOF : -1;
2335 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2337 MXFContext *mxf = s->priv_data;
2339 int64_t ret64, pos, next_pos;
2344 if (mxf->op != OPAtom)
2345 return mxf_read_packet_old(s, pkt);
2347 /* OPAtom - clip wrapped demuxing */
2348 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2350 t = &mxf->index_tables[0];
2352 if (mxf->current_edit_unit >= st->duration)
2355 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2357 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2360 /* compute size by finding the next edit unit or the end of the essence container
2361 * not pretty, but it works */
2362 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2363 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2364 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2365 return AVERROR_INVALIDDATA;
2368 if ((size = next_pos - pos) <= 0) {
2369 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2370 return AVERROR_INVALIDDATA;
2373 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2376 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2379 pkt->stream_index = 0;
2381 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2382 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2383 pkt->dts = mxf->current_edit_unit + t->first_dts;
2384 pkt->pts = t->ptses[mxf->current_edit_unit];
2385 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2386 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2391 mxf->current_edit_unit += edit_units;
2396 static int mxf_read_close(AVFormatContext *s)
2398 MXFContext *mxf = s->priv_data;
2399 MXFIndexTableSegment *seg;
2402 av_freep(&mxf->packages_refs);
2404 for (i = 0; i < s->nb_streams; i++)
2405 s->streams[i]->priv_data = NULL;
2407 for (i = 0; i < mxf->metadata_sets_count; i++) {
2408 switch (mxf->metadata_sets[i]->type) {
2410 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2412 case MultipleDescriptor:
2413 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2416 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2419 case MaterialPackage:
2420 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2422 case IndexTableSegment:
2423 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2424 av_freep(&seg->temporal_offset_entries);
2425 av_freep(&seg->flag_entries);
2426 av_freep(&seg->stream_offset_entries);
2431 av_freep(&mxf->metadata_sets[i]);
2433 av_freep(&mxf->partitions);
2434 av_freep(&mxf->metadata_sets);
2435 av_freep(&mxf->aesc);
2436 av_freep(&mxf->local_tags);
2438 if (mxf->index_tables) {
2439 for (i = 0; i < mxf->nb_index_tables; i++) {
2440 av_freep(&mxf->index_tables[i].segments);
2441 av_freep(&mxf->index_tables[i].ptses);
2442 av_freep(&mxf->index_tables[i].fake_index);
2445 av_freep(&mxf->index_tables);
2450 static int mxf_probe(AVProbeData *p) {
2451 const uint8_t *bufp = p->buf;
2452 const uint8_t *end = p->buf + p->buf_size;
2454 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2457 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2458 end -= sizeof(mxf_header_partition_pack_key);
2459 for (; bufp < end; bufp++) {
2460 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2461 return AVPROBE_SCORE_MAX;
2466 /* rudimentary byte seek */
2467 /* XXX: use MXF Index */
2468 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2470 AVStream *st = s->streams[stream_index];
2472 MXFContext* mxf = s->priv_data;
2477 MXFTrack *source_track = st->priv_data;
2479 /* if audio then truncate sample_time to EditRate */
2480 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2481 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2483 if (mxf->nb_index_tables <= 0) {
2485 return AVERROR_INVALIDDATA;
2486 if (sample_time < 0)
2488 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2490 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2492 ff_update_cur_dts(s, st, sample_time);
2493 mxf->current_edit_unit = sample_time;
2495 t = &mxf->index_tables[0];
2497 /* clamp above zero, else ff_index_search_timestamp() returns negative
2498 * this also means we allow seeking before the start */
2499 sample_time = FFMAX(sample_time, 0);
2501 if (t->fake_index) {
2502 /* behave as if we have a proper index */
2503 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2506 /* no IndexEntryArray (one or more CBR segments)
2507 * make sure we don't seek past the end */
2508 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2511 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2514 ff_update_cur_dts(s, st, sample_time);
2515 mxf->current_edit_unit = sample_time;
2516 avio_seek(s->pb, seekpos, SEEK_SET);
2519 // Update all tracks sample count
2520 for (i = 0; i < s->nb_streams; i++) {
2521 AVStream *cur_st = s->streams[i];
2522 MXFTrack *cur_track = cur_st->priv_data;
2523 uint64_t current_sample_count = 0;
2524 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2525 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2529 cur_track->sample_count = current_sample_count;
2535 AVInputFormat ff_mxf_demuxer = {
2537 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2538 .priv_data_size = sizeof(MXFContext),
2539 .read_probe = mxf_probe,
2540 .read_header = mxf_read_header,
2541 .read_packet = mxf_read_packet,
2542 .read_close = mxf_read_close,
2543 .read_seek = mxf_read_seek,