3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
72 OPSonyOpt, /* FATE sample, violates the spec in places */
78 MXFPartitionType type;
79 uint64_t previous_partition;
82 int64_t this_partition;
83 int64_t essence_offset; ///< absolute offset of essence
84 int64_t essence_length;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
103 int64_t start_position;
105 } MXFStructuralComponent;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
118 enum MXFMetadataSetType type;
119 MXFSequence *sequence; /* mandatory, and only one */
122 uint8_t track_number[4];
123 AVRational edit_rate;
128 enum MXFMetadataSetType type;
129 UID essence_container_ul;
130 UID essence_codec_ul;
131 AVRational sample_rate;
132 AVRational aspect_ratio;
137 unsigned int component_depth;
138 unsigned int horiz_subsampling;
139 unsigned int vert_subsampling;
140 UID *sub_descriptors_refs;
141 int sub_descriptors_count;
145 enum PixelFormat pix_fmt;
150 enum MXFMetadataSetType type;
151 int edit_unit_byte_count;
154 AVRational index_edit_rate;
155 uint64_t index_start_position;
156 uint64_t index_duration;
157 int8_t *temporal_offset_entries;
159 uint64_t *stream_offset_entries;
160 int nb_index_entries;
161 } MXFIndexTableSegment;
165 enum MXFMetadataSetType type;
169 MXFDescriptor *descriptor; /* only one */
175 enum MXFMetadataSetType type;
178 /* decoded index table */
182 int nb_ptses; /* number of PTSes or total duration of index */
183 int64_t first_dts; /* DTS = EditUnit + first_dts */
184 int64_t *ptses; /* maps EditUnit -> PTS */
186 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
187 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
191 MXFPartition *partitions;
192 unsigned partitions_count;
196 MXFMetadataSet **metadata_sets;
197 int metadata_sets_count;
201 int local_tags_count;
202 uint64_t footer_partition;
203 KLVPacket current_klv_data;
204 int current_klv_index;
206 MXFPartition *current_partition;
207 int parsing_backward;
208 int64_t last_forward_tell;
209 int last_forward_partition;
210 int current_edit_unit;
212 MXFIndexTable *index_tables;
213 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
216 enum MXFWrappingScheme {
221 /* NOTE: klv_offset is not set (-1) for local keys */
222 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
226 MXFMetadataReadFunc *read;
228 enum MXFMetadataSetType type;
229 } MXFMetadataReadTableEntry;
231 /* partial keys to match */
232 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
233 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
234 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
235 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
236 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
237 /* complete keys to match */
238 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 };
239 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
240 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
241 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
243 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
245 static int64_t klv_decode_ber_length(AVIOContext *pb)
247 uint64_t size = avio_r8(pb);
248 if (size & 0x80) { /* long form */
249 int bytes_num = size & 0x7f;
250 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
252 return AVERROR_INVALIDDATA;
255 size = size << 8 | avio_r8(pb);
260 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
263 for (i = 0; i < size && !pb->eof_reached; i++) {
267 else if (b != key[i])
273 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
275 if (!mxf_read_sync(pb, mxf_klv_key, 4))
276 return AVERROR_INVALIDDATA;
277 klv->offset = avio_tell(pb) - 4;
278 memcpy(klv->key, mxf_klv_key, 4);
279 avio_read(pb, klv->key + 4, 12);
280 klv->length = klv_decode_ber_length(pb);
281 return klv->length == -1 ? -1 : 0;
284 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
288 for (i = 0; i < s->nb_streams; i++) {
289 MXFTrack *track = s->streams[i]->priv_data;
291 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
294 /* return 0 if only one stream, for OP Atom files with 0 as track number */
295 return s->nb_streams == 1 ? 0 : -1;
298 /* XXX: use AVBitStreamFilter */
299 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
301 const uint8_t *buf_ptr, *end_ptr;
305 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
306 return AVERROR_INVALIDDATA;
307 length = av_get_packet(pb, pkt, length);
310 data_ptr = pkt->data;
311 end_ptr = pkt->data + length;
312 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
313 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
314 for (i = 0; i < st->codec->channels; i++) {
315 uint32_t sample = bytestream_get_le32(&buf_ptr);
316 if (st->codec->bits_per_coded_sample == 24)
317 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
319 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
321 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
323 av_shrink_packet(pkt, data_ptr - pkt->data);
327 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
329 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
330 MXFContext *mxf = s->priv_data;
331 AVIOContext *pb = s->pb;
332 int64_t end = avio_tell(pb) + klv->length;
335 uint64_t plaintext_size;
340 if (!mxf->aesc && s->key && s->keylen == 16) {
341 mxf->aesc = av_malloc(av_aes_size);
343 return AVERROR(ENOMEM);
344 av_aes_init(mxf->aesc, s->key, 128, 1);
347 avio_skip(pb, klv_decode_ber_length(pb));
349 klv_decode_ber_length(pb);
350 plaintext_size = avio_rb64(pb);
352 klv_decode_ber_length(pb);
353 avio_read(pb, klv->key, 16);
354 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
355 return AVERROR_INVALIDDATA;
356 index = mxf_get_stream_index(s, klv);
358 return AVERROR_INVALIDDATA;
360 klv_decode_ber_length(pb);
361 orig_size = avio_rb64(pb);
362 if (orig_size < plaintext_size)
363 return AVERROR_INVALIDDATA;
365 size = klv_decode_ber_length(pb);
366 if (size < 32 || size - 32 < orig_size)
367 return AVERROR_INVALIDDATA;
368 avio_read(pb, ivec, 16);
369 avio_read(pb, tmpbuf, 16);
371 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
372 if (memcmp(tmpbuf, checkv, 16))
373 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
375 size = av_get_packet(pb, pkt, size);
378 else if (size < plaintext_size)
379 return AVERROR_INVALIDDATA;
380 size -= plaintext_size;
382 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
383 &pkt->data[plaintext_size], size >> 4, ivec, 1);
384 av_shrink_packet(pkt, orig_size);
385 pkt->stream_index = index;
386 avio_skip(pb, end - avio_tell(pb));
390 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
392 MXFContext *mxf = arg;
393 int item_num = avio_rb32(pb);
394 int item_len = avio_rb32(pb);
396 if (item_len != 18) {
397 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
399 return AVERROR_PATCHWELCOME;
401 if (item_num > UINT_MAX / item_len)
402 return AVERROR_INVALIDDATA;
403 mxf->local_tags_count = item_num;
404 mxf->local_tags = av_malloc(item_num*item_len);
405 if (!mxf->local_tags)
406 return AVERROR(ENOMEM);
407 avio_read(pb, mxf->local_tags, item_num*item_len);
411 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
413 MXFContext *mxf = arg;
414 MXFPartition *partition, *tmp_part;
416 uint64_t footer_partition;
417 uint32_t nb_essence_containers;
419 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
420 return AVERROR(ENOMEM);
422 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
424 return AVERROR(ENOMEM);
425 mxf->partitions = tmp_part;
427 if (mxf->parsing_backward) {
428 /* insert the new partition pack in the middle
429 * this makes the entries in mxf->partitions sorted by offset */
430 memmove(&mxf->partitions[mxf->last_forward_partition+1],
431 &mxf->partitions[mxf->last_forward_partition],
432 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
433 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
435 mxf->last_forward_partition++;
436 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
439 memset(partition, 0, sizeof(*partition));
440 mxf->partitions_count++;
441 partition->pack_length = avio_tell(pb) - klv_offset + size;
445 partition->type = Header;
448 partition->type = BodyPartition;
451 partition->type = Footer;
454 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
455 return AVERROR_INVALIDDATA;
458 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
459 partition->closed = partition->type == Footer || !(uid[14] & 1);
460 partition->complete = uid[14] > 2;
462 partition->kag_size = avio_rb32(pb);
463 partition->this_partition = avio_rb64(pb);
464 partition->previous_partition = avio_rb64(pb);
465 footer_partition = avio_rb64(pb);
466 partition->header_byte_count = avio_rb64(pb);
467 partition->index_byte_count = avio_rb64(pb);
468 partition->index_sid = avio_rb32(pb);
470 partition->body_sid = avio_rb32(pb);
471 avio_read(pb, op, sizeof(UID));
472 nb_essence_containers = avio_rb32(pb);
474 /* some files don'thave FooterPartition set in every partition */
475 if (footer_partition) {
476 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
477 av_log(mxf->fc, AV_LOG_ERROR,
478 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
479 mxf->footer_partition, footer_partition);
481 mxf->footer_partition = footer_partition;
486 "PartitionPack: ThisPartition = 0x%"PRIX64
487 ", PreviousPartition = 0x%"PRIX64", "
488 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
489 partition->this_partition,
490 partition->previous_partition, footer_partition,
491 partition->index_sid, partition->body_sid);
493 /* sanity check PreviousPartition if set */
494 if (partition->previous_partition &&
495 mxf->run_in + partition->previous_partition >= klv_offset) {
496 av_log(mxf->fc, AV_LOG_ERROR,
497 "PreviousPartition points to this partition or forward\n");
498 return AVERROR_INVALIDDATA;
501 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
502 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
503 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
504 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
505 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
506 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
507 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
508 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
509 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
510 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
511 else if (op[12] == 0x10) {
512 /* SMPTE 390m: "There shall be exactly one essence container"
513 * The following block deals with files that violate this, namely:
514 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
515 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
516 if (nb_essence_containers != 1) {
517 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
521 av_log(mxf->fc, AV_LOG_WARNING,
522 "\"OPAtom\" with %u ECs - assuming %s\n",
523 nb_essence_containers,
524 op == OP1a ? "OP1a" : "OPAtom");
530 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
534 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
535 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
537 if (mxf->op == OPSonyOpt)
538 partition->kag_size = 512;
540 partition->kag_size = 1;
542 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
548 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
550 MXFMetadataSet **tmp;
551 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
552 return AVERROR(ENOMEM);
553 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
555 return AVERROR(ENOMEM);
556 mxf->metadata_sets = tmp;
557 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
558 mxf->metadata_sets_count++;
562 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
564 MXFCryptoContext *cryptocontext = arg;
566 return AVERROR_INVALIDDATA;
567 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
568 avio_read(pb, cryptocontext->source_container_ul, 16);
572 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
574 MXFContext *mxf = arg;
577 mxf->packages_count = avio_rb32(pb);
578 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
579 return AVERROR_INVALIDDATA;
580 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
581 if (!mxf->packages_refs)
582 return AVERROR(ENOMEM);
583 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
584 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
590 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
592 MXFStructuralComponent *source_clip = arg;
595 source_clip->duration = avio_rb64(pb);
598 source_clip->start_position = avio_rb64(pb);
601 /* UMID, only get last 16 bytes */
603 avio_read(pb, source_clip->source_package_uid, 16);
606 source_clip->source_track_id = avio_rb32(pb);
612 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
614 MXFPackage *package = arg;
617 package->tracks_count = avio_rb32(pb);
618 if (package->tracks_count >= UINT_MAX / sizeof(UID))
619 return AVERROR_INVALIDDATA;
620 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
621 if (!package->tracks_refs)
622 return AVERROR(ENOMEM);
623 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
624 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
630 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
632 MXFTrack *track = arg;
635 track->track_id = avio_rb32(pb);
638 avio_read(pb, track->track_number, 4);
641 track->edit_rate.num = avio_rb32(pb);
642 track->edit_rate.den = avio_rb32(pb);
645 avio_read(pb, track->sequence_ref, 16);
651 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
653 MXFSequence *sequence = arg;
656 sequence->duration = avio_rb64(pb);
659 avio_read(pb, sequence->data_definition_ul, 16);
662 sequence->structural_components_count = avio_rb32(pb);
663 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
664 return AVERROR_INVALIDDATA;
665 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
666 if (!sequence->structural_components_refs)
667 return AVERROR(ENOMEM);
668 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
669 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
675 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
677 MXFPackage *package = arg;
680 package->tracks_count = avio_rb32(pb);
681 if (package->tracks_count >= UINT_MAX / sizeof(UID))
682 return AVERROR_INVALIDDATA;
683 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
684 if (!package->tracks_refs)
685 return AVERROR(ENOMEM);
686 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
687 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
690 /* UMID, only get last 16 bytes */
692 avio_read(pb, package->package_uid, 16);
695 avio_read(pb, package->descriptor_ref, 16);
701 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
705 segment->nb_index_entries = avio_rb32(pb);
706 if (!segment->nb_index_entries)
708 else if (segment->nb_index_entries < 0 ||
709 segment->nb_index_entries >
710 (INT_MAX / sizeof(*segment->stream_offset_entries)))
711 return AVERROR(ENOMEM);
713 length = avio_rb32(pb);
715 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
716 sizeof(*segment->temporal_offset_entries));
717 segment->flag_entries = av_mallocz(segment->nb_index_entries *
718 sizeof(*segment->flag_entries));
719 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
720 sizeof(*segment->stream_offset_entries));
722 if (!segment->flag_entries || !segment->stream_offset_entries ||
723 !segment->temporal_offset_entries) {
724 av_freep(&segment->flag_entries);
725 av_freep(&segment->stream_offset_entries);
726 av_freep(&segment->temporal_offset_entries);
727 return AVERROR(ENOMEM);
730 for (i = 0; i < segment->nb_index_entries; i++) {
731 segment->temporal_offset_entries[i] = avio_r8(pb);
732 avio_r8(pb); /* KeyFrameOffset */
733 segment->flag_entries[i] = avio_r8(pb);
734 segment->stream_offset_entries[i] = avio_rb64(pb);
735 avio_skip(pb, length - 11);
740 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
742 MXFIndexTableSegment *segment = arg;
745 segment->edit_unit_byte_count = avio_rb32(pb);
746 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
749 segment->index_sid = avio_rb32(pb);
750 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
753 segment->body_sid = avio_rb32(pb);
754 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
757 av_dlog(NULL, "IndexEntryArray found\n");
758 return mxf_read_index_entry_array(pb, segment);
760 segment->index_edit_rate.num = avio_rb32(pb);
761 segment->index_edit_rate.den = avio_rb32(pb);
762 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
763 segment->index_edit_rate.den);
766 segment->index_start_position = avio_rb64(pb);
767 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
770 segment->index_duration = avio_rb64(pb);
771 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
777 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
779 int code, value, ofs = 0;
780 char layout[16] = {0};
785 av_dlog(NULL, "pixel layout: code %#x\n", code);
788 layout[ofs++] = code;
789 layout[ofs++] = value;
791 } while (code != 0); /* SMPTE 377M E.2.46 */
793 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
796 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
798 MXFDescriptor *descriptor = arg;
799 descriptor->pix_fmt = PIX_FMT_NONE;
802 descriptor->sub_descriptors_count = avio_rb32(pb);
803 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
804 return AVERROR_INVALIDDATA;
805 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
806 if (!descriptor->sub_descriptors_refs)
807 return AVERROR(ENOMEM);
808 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
809 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
812 avio_read(pb, descriptor->essence_container_ul, 16);
815 descriptor->linked_track_id = avio_rb32(pb);
817 case 0x3201: /* PictureEssenceCoding */
818 avio_read(pb, descriptor->essence_codec_ul, 16);
821 descriptor->width = avio_rb32(pb);
824 descriptor->height = avio_rb32(pb);
827 descriptor->aspect_ratio.num = avio_rb32(pb);
828 descriptor->aspect_ratio.den = avio_rb32(pb);
831 descriptor->component_depth = avio_rb32(pb);
834 descriptor->horiz_subsampling = avio_rb32(pb);
837 descriptor->vert_subsampling = avio_rb32(pb);
840 descriptor->sample_rate.num = avio_rb32(pb);
841 descriptor->sample_rate.den = avio_rb32(pb);
843 case 0x3D06: /* SoundEssenceCompression */
844 avio_read(pb, descriptor->essence_codec_ul, 16);
847 descriptor->channels = avio_rb32(pb);
850 descriptor->bits_per_sample = avio_rb32(pb);
853 mxf_read_pixel_layout(pb, descriptor);
856 /* Private uid used by SONY C0023S01.mxf */
857 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
858 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
859 if (!descriptor->extradata)
860 return AVERROR(ENOMEM);
861 descriptor->extradata_size = size;
862 avio_read(pb, descriptor->extradata, size);
870 * Match an uid independently of the version byte and up to len common bytes
873 static int mxf_match_uid(const UID key, const UID uid, int len)
876 for (i = 0; i < len; i++) {
877 if (i != 7 && key[i] != uid[i])
883 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
885 while (uls->uid[0]) {
886 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
893 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
899 for (i = 0; i < mxf->metadata_sets_count; i++) {
900 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
901 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
902 return mxf->metadata_sets[i];
908 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
909 // video essence container uls
910 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
911 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
912 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
913 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
915 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
916 // sound essence container uls
917 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
918 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
919 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
920 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
921 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
924 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
926 int i, j, nb_segments = 0;
927 MXFIndexTableSegment **unsorted_segments;
928 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
930 /* count number of segments, allocate arrays and copy unsorted segments */
931 for (i = 0; i < mxf->metadata_sets_count; i++)
932 if (mxf->metadata_sets[i]->type == IndexTableSegment)
935 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
936 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
937 if (!sorted_segments || !unsorted_segments) {
938 av_freep(sorted_segments);
939 av_free(unsorted_segments);
940 return AVERROR(ENOMEM);
943 for (i = j = 0; i < mxf->metadata_sets_count; i++)
944 if (mxf->metadata_sets[i]->type == IndexTableSegment)
945 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
947 *nb_sorted_segments = 0;
949 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
950 for (i = 0; i < nb_segments; i++) {
951 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
953 for (j = 0; j < nb_segments; j++) {
954 MXFIndexTableSegment *s = unsorted_segments[j];
956 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
957 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
959 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
960 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
962 best_body_sid = s->body_sid;
963 best_index_sid = s->index_sid;
964 best_index_start = s->index_start_position;
968 /* no suitable entry found -> we're done */
972 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
973 last_body_sid = best_body_sid;
974 last_index_sid = best_index_sid;
975 last_index_start = best_index_start;
978 av_free(unsorted_segments);
984 * Computes the absolute file offset of the given essence container offset
986 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
989 int64_t offset_in = offset; /* for logging */
991 for (x = 0; x < mxf->partitions_count; x++) {
992 MXFPartition *p = &mxf->partitions[x];
994 if (p->body_sid != body_sid)
997 if (offset < p->essence_length || !p->essence_length) {
998 *offset_out = p->essence_offset + offset;
1002 offset -= p->essence_length;
1005 av_log(mxf->fc, AV_LOG_ERROR,
1006 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1007 offset_in, body_sid);
1009 return AVERROR_INVALIDDATA;
1013 * Returns the end position of the essence container with given BodySID, or zero if unknown
1015 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1020 for (x = 0; x < mxf->partitions_count; x++) {
1021 MXFPartition *p = &mxf->partitions[x];
1023 if (p->body_sid != body_sid)
1026 if (!p->essence_length)
1029 ret = p->essence_offset + p->essence_length;
1035 /* EditUnit -> absolute offset */
1036 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)
1039 int64_t offset_temp = 0;
1041 for (i = 0; i < index_table->nb_segments; i++) {
1042 MXFIndexTableSegment *s = index_table->segments[i];
1044 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1046 if (edit_unit < s->index_start_position + s->index_duration) {
1047 int64_t index = edit_unit - s->index_start_position;
1049 if (s->edit_unit_byte_count)
1050 offset_temp += s->edit_unit_byte_count * index;
1051 else if (s->nb_index_entries) {
1052 if (s->nb_index_entries == 2 * s->index_duration + 1)
1053 index *= 2; /* Avid index */
1055 if (index < 0 || index > s->nb_index_entries) {
1056 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1057 index_table->index_sid, s->index_start_position);
1058 return AVERROR_INVALIDDATA;
1061 offset_temp = s->stream_offset_entries[index];
1063 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1064 index_table->index_sid, s->index_start_position);
1065 return AVERROR_INVALIDDATA;
1069 *edit_unit_out = edit_unit;
1071 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1073 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1074 offset_temp += s->edit_unit_byte_count * s->index_duration;
1079 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);
1081 return AVERROR_INVALIDDATA;
1084 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1087 int8_t max_temporal_offset = -128;
1089 /* first compute how many entries we have */
1090 for (i = 0; i < index_table->nb_segments; i++) {
1091 MXFIndexTableSegment *s = index_table->segments[i];
1093 if (!s->nb_index_entries) {
1094 index_table->nb_ptses = 0;
1095 return 0; /* no TemporalOffsets */
1098 index_table->nb_ptses += s->index_duration;
1101 /* paranoid check */
1102 if (index_table->nb_ptses <= 0)
1105 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1106 return AVERROR(ENOMEM);
1108 index_table->ptses = av_mallocz(index_table->nb_ptses *
1110 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1111 sizeof(AVIndexEntry));
1112 if (!index_table->ptses || !index_table->fake_index) {
1113 av_freep(&index_table->ptses);
1114 return AVERROR(ENOMEM);
1117 /* we may have a few bad TemporalOffsets
1118 * make sure the corresponding PTSes don't have the bogus value 0 */
1119 for (x = 0; x < index_table->nb_ptses; x++)
1120 index_table->ptses[x] = AV_NOPTS_VALUE;
1134 * We want to transform it into this:
1145 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1146 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1147 * The latter makes DTS <= PTS.
1149 for (i = x = 0; i < index_table->nb_segments; i++) {
1150 MXFIndexTableSegment *s = index_table->segments[i];
1151 int index_delta = 1;
1152 int n = s->nb_index_entries;
1154 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1155 index_delta = 2; /* Avid index */
1156 /* ignore the last entry - it's the size of the essence container */
1160 for (j = 0; j < n; j += index_delta, x++) {
1161 int offset = s->temporal_offset_entries[j] / index_delta;
1162 int index = x + offset;
1164 if (x >= index_table->nb_ptses) {
1165 av_log(mxf->fc, AV_LOG_ERROR,
1166 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1167 s->nb_index_entries, s->index_duration);
1171 index_table->fake_index[x].timestamp = x;
1172 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1174 if (index < 0 || index >= index_table->nb_ptses) {
1175 av_log(mxf->fc, AV_LOG_ERROR,
1176 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1181 index_table->ptses[index] = x;
1182 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1186 index_table->first_dts = -max_temporal_offset;
1192 * Sorts and collects index table segments into index tables.
1193 * Also computes PTSes if possible.
1195 static int mxf_compute_index_tables(MXFContext *mxf)
1197 int i, j, k, ret, nb_sorted_segments;
1198 MXFIndexTableSegment **sorted_segments = NULL;
1200 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1201 nb_sorted_segments <= 0) {
1202 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1206 /* sanity check and count unique BodySIDs/IndexSIDs */
1207 for (i = 0; i < nb_sorted_segments; i++) {
1208 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1209 mxf->nb_index_tables++;
1210 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1211 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1212 ret = AVERROR_INVALIDDATA;
1213 goto finish_decoding_index;
1217 if (mxf->nb_index_tables > INT_MAX / sizeof(MXFIndexTable) ||
1218 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1219 sizeof(MXFIndexTable)))) {
1220 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1221 ret = AVERROR(ENOMEM);
1222 goto finish_decoding_index;
1225 /* distribute sorted segments to index tables */
1226 for (i = j = 0; i < nb_sorted_segments; i++) {
1227 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1232 mxf->index_tables[j].nb_segments++;
1235 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1236 MXFIndexTable *t = &mxf->index_tables[j];
1238 if (t->nb_segments >
1239 (INT_MAX / sizeof(MXFIndexTableSegment *)) ||
1240 !(t->segments = av_mallocz(t->nb_segments *
1241 sizeof(MXFIndexTableSegment*)))) {
1242 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1243 " pointer array\n");
1244 ret = AVERROR(ENOMEM);
1245 goto finish_decoding_index;
1248 if (sorted_segments[i]->index_start_position)
1249 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1250 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1252 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1253 t->index_sid = sorted_segments[i]->index_sid;
1254 t->body_sid = sorted_segments[i]->body_sid;
1256 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1257 goto finish_decoding_index;
1259 /* fix zero IndexDurations */
1260 for (k = 0; k < t->nb_segments; k++) {
1261 if (t->segments[k]->index_duration)
1264 if (t->nb_segments > 1)
1265 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1268 if (mxf->fc->nb_streams <= 0) {
1269 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1273 /* assume the first stream's duration is reasonable
1274 * leave index_duration = 0 on further segments in case we have any (unlikely)
1276 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1282 finish_decoding_index:
1283 av_free(sorted_segments);
1287 static int mxf_parse_structural_metadata(MXFContext *mxf)
1289 MXFPackage *material_package = NULL;
1290 MXFPackage *temp_package = NULL;
1293 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1294 /* TODO: handle multiple material packages (OP3x) */
1295 for (i = 0; i < mxf->packages_count; i++) {
1296 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1297 if (material_package) break;
1299 if (!material_package) {
1300 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1301 return AVERROR_INVALIDDATA;
1304 for (i = 0; i < material_package->tracks_count; i++) {
1305 MXFPackage *source_package = NULL;
1306 MXFTrack *material_track = NULL;
1307 MXFTrack *source_track = NULL;
1308 MXFTrack *temp_track = NULL;
1309 MXFDescriptor *descriptor = NULL;
1310 MXFStructuralComponent *component = NULL;
1311 UID *essence_container_ul = NULL;
1312 const MXFCodecUL *codec_ul = NULL;
1313 const MXFCodecUL *container_ul = NULL;
1314 const MXFCodecUL *pix_fmt_ul = NULL;
1317 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1318 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1322 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1323 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1327 /* TODO: handle multiple source clips */
1328 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1329 /* TODO: handle timecode component */
1330 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1334 for (k = 0; k < mxf->packages_count; k++) {
1335 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1338 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1339 source_package = temp_package;
1343 if (!source_package) {
1344 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1347 for (k = 0; k < source_package->tracks_count; k++) {
1348 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1349 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1350 ret = AVERROR_INVALIDDATA;
1353 if (temp_track->track_id == component->source_track_id) {
1354 source_track = temp_track;
1358 if (!source_track) {
1359 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1363 if (!source_track || !component)
1366 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1367 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1368 ret = AVERROR_INVALIDDATA;
1372 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1373 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1374 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1375 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1379 st = avformat_new_stream(mxf->fc, NULL);
1381 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1382 ret = AVERROR(ENOMEM);
1385 st->id = source_track->track_id;
1386 st->priv_data = source_track;
1387 st->duration = component->duration;
1388 if (st->duration == -1)
1389 st->duration = AV_NOPTS_VALUE;
1390 st->start_time = component->start_position;
1391 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1393 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1394 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1395 st->codec->codec_type = codec_ul->id;
1397 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1398 if (source_package->descriptor) {
1399 if (source_package->descriptor->type == MultipleDescriptor) {
1400 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1401 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1403 if (!sub_descriptor) {
1404 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1407 if (sub_descriptor->linked_track_id == source_track->track_id) {
1408 descriptor = sub_descriptor;
1412 } else if (source_package->descriptor->type == Descriptor)
1413 descriptor = source_package->descriptor;
1416 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1419 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1420 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1421 essence_container_ul = &descriptor->essence_container_ul;
1422 /* HACK: replacing the original key with mxf_encrypted_essence_container
1423 * is not allowed according to s429-6, try to find correct information anyway */
1424 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1425 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1426 for (k = 0; k < mxf->metadata_sets_count; k++) {
1427 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1428 if (metadata->type == CryptoContext) {
1429 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1435 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1436 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1437 st->codec->codec_id = codec_ul->id;
1438 if (descriptor->extradata) {
1439 st->codec->extradata = descriptor->extradata;
1440 st->codec->extradata_size = descriptor->extradata_size;
1442 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1443 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1444 if (st->codec->codec_id == CODEC_ID_NONE)
1445 st->codec->codec_id = container_ul->id;
1446 st->codec->width = descriptor->width;
1447 st->codec->height = descriptor->height;
1448 if (st->codec->codec_id == CODEC_ID_RAWVIDEO) {
1449 st->codec->pix_fmt = descriptor->pix_fmt;
1450 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1451 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1452 &descriptor->essence_codec_ul);
1453 st->codec->pix_fmt = pix_fmt_ul->id;
1454 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1455 /* support files created before RP224v10 by defaulting to UYVY422
1456 if subsampling is 4:2:2 and component depth is 8-bit */
1457 if (descriptor->horiz_subsampling == 2 &&
1458 descriptor->vert_subsampling == 1 &&
1459 descriptor->component_depth == 8) {
1460 st->codec->pix_fmt = PIX_FMT_UYVY422;
1465 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1466 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1467 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1468 if (st->codec->codec_id == CODEC_ID_NONE)
1469 st->codec->codec_id = container_ul->id;
1470 st->codec->channels = descriptor->channels;
1471 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1473 if (descriptor->sample_rate.den > 0)
1474 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1476 /* TODO: implement CODEC_ID_RAWAUDIO */
1477 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1478 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1479 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1480 else if (descriptor->bits_per_sample == 32)
1481 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1482 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1483 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1484 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1485 else if (descriptor->bits_per_sample == 32)
1486 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1487 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1488 st->need_parsing = AVSTREAM_PARSE_FULL;
1491 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1492 /* TODO: decode timestamps */
1493 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1502 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1503 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1504 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1505 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1506 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1507 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1508 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1509 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1510 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1511 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1512 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1513 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1514 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1515 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1516 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1517 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1518 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1519 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1520 { { 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 */
1521 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1522 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1523 { { 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 */
1524 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1525 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1526 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1527 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1528 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1529 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1530 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1533 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1535 AVIOContext *pb = mxf->fc->pb;
1536 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1537 uint64_t klv_end = avio_tell(pb) + klv->length;
1540 return AVERROR(ENOMEM);
1541 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1543 int tag = avio_rb16(pb);
1544 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1545 uint64_t next = avio_tell(pb) + size;
1548 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1549 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1550 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1553 if (tag > 0x7FFF) { /* dynamic tag */
1555 for (i = 0; i < mxf->local_tags_count; i++) {
1556 int local_tag = AV_RB16(mxf->local_tags+i*18);
1557 if (local_tag == tag) {
1558 memcpy(uid, mxf->local_tags+i*18+2, 16);
1559 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1560 PRINT_KEY(mxf->fc, "uid", uid);
1564 if (ctx_size && tag == 0x3C0A)
1565 avio_read(pb, ctx->uid, 16);
1566 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1569 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1570 * it extending past the end of the KLV though (zzuf5.mxf). */
1571 if (avio_tell(pb) > klv_end) {
1572 av_log(mxf->fc, AV_LOG_ERROR,
1573 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1575 return AVERROR_INVALIDDATA;
1576 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1577 avio_seek(pb, next, SEEK_SET);
1579 if (ctx_size) ctx->type = type;
1580 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1584 * Seeks to the previous partition, if possible
1585 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1587 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1589 AVIOContext *pb = mxf->fc->pb;
1591 if (!mxf->current_partition ||
1592 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1593 return 0; /* we've parsed all partitions */
1595 /* seek to previous partition */
1596 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1597 mxf->current_partition = NULL;
1599 av_dlog(mxf->fc, "seeking to previous partition\n");
1605 * Called when essence is encountered
1606 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1608 static int mxf_parse_handle_essence(MXFContext *mxf)
1610 AVIOContext *pb = mxf->fc->pb;
1613 if (mxf->parsing_backward) {
1614 return mxf_seek_to_previous_partition(mxf);
1616 if (!mxf->footer_partition) {
1617 av_dlog(mxf->fc, "no footer\n");
1621 av_dlog(mxf->fc, "seeking to footer\n");
1623 /* remember where we were so we don't end up seeking further back than this */
1624 mxf->last_forward_tell = avio_tell(pb);
1626 if (!pb->seekable) {
1627 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1631 /* seek to footer partition and parse backward */
1632 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1633 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1634 mxf->run_in + mxf->footer_partition, ret);
1638 mxf->current_partition = NULL;
1639 mxf->parsing_backward = 1;
1646 * Called when the next partition or EOF is encountered
1647 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1649 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1651 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1655 * Figure out the proper offset and length of the essence container
1658 static void mxf_compute_essence_containers(MXFContext *mxf)
1662 /* everything is already correct */
1663 if (mxf->op == OPAtom)
1666 for (x = 0; x < mxf->partitions_count; x++) {
1667 MXFPartition *p = &mxf->partitions[x];
1670 continue; /* BodySID == 0 -> no essence */
1672 if (x >= mxf->partitions_count - 1)
1673 break; /* last partition - can't compute length (and we don't need to) */
1675 /* essence container spans to the next partition */
1676 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1678 if (p->essence_length < 0) {
1679 /* next ThisPartition < essence_offset */
1680 p->essence_length = 0;
1681 av_log(mxf->fc, AV_LOG_ERROR,
1682 "partition %i: bad ThisPartition = %"PRIX64"\n",
1683 x+1, mxf->partitions[x+1].this_partition);
1688 static int64_t round_to_kag(int64_t position, int kag_size)
1690 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1691 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1692 int64_t ret = (position / kag_size) * kag_size;
1693 return ret == position ? ret : ret + kag_size;
1696 static inline void compute_partition_essence_offset(AVFormatContext *s,
1700 MXFPartition *cur_part = mxf->current_partition;
1701 /* for OP1a we compute essence_offset
1702 * for OPAtom we point essence_offset after the KL
1703 * (usually op1a_essence_offset + 20 or 25)
1704 * TODO: for OP1a we could eliminate this entire if statement, always
1705 * stopping parsing at op1a_essence_offset
1706 * for OPAtom we still need the actual essence_offset though
1707 * (the KL's length can vary)
1709 int64_t op1a_essence_offset =
1710 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1711 cur_part->kag_size) +
1712 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1713 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1715 if (mxf->op == OPAtom) {
1716 /* point essence_offset to the actual data
1717 * OPAtom has all the essence in one big KLV
1719 cur_part->essence_offset = avio_tell(s->pb);
1720 cur_part->essence_length = klv->length;
1722 /* NOTE: op1a_essence_offset may be less than to klv.offset
1724 cur_part->essence_offset = op1a_essence_offset;
1728 static int is_pcm(enum CodecID codec_id)
1730 /* we only care about "normal" PCM codecs until we get samples */
1731 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1735 * Deal with the case where for some audio atoms EditUnitByteCount is
1736 * very small (2, 4..). In those cases we should read more than one
1737 * sample per call to mxf_read_packet().
1739 static void mxf_handle_small_eubc(AVFormatContext *s)
1741 MXFContext *mxf = s->priv_data;
1743 /* assuming non-OPAtom == frame wrapped
1744 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1745 if (mxf->op != OPAtom)
1748 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1749 if (s->nb_streams != 1 ||
1750 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1751 !is_pcm(s->streams[0]->codec->codec_id) ||
1752 mxf->nb_index_tables != 1 ||
1753 mxf->index_tables[0].nb_segments != 1 ||
1754 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1757 /* arbitrarily default to 48 kHz PAL audio frame size */
1758 /* TODO: We could compute this from the ratio between the audio
1759 * and video edit rates for 48 kHz NTSC we could use the
1760 * 1802-1802-1802-1802-1801 pattern. */
1761 mxf->edit_units_per_packet = 1920;
1764 static int mxf_read_header(AVFormatContext *s)
1766 MXFContext *mxf = s->priv_data;
1768 int64_t essence_offset = 0;
1771 mxf->last_forward_tell = INT64_MAX;
1772 mxf->edit_units_per_packet = 1;
1774 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1775 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1776 return AVERROR_INVALIDDATA;
1778 avio_seek(s->pb, -14, SEEK_CUR);
1780 mxf->run_in = avio_tell(s->pb);
1782 while (!s->pb->eof_reached) {
1783 const MXFMetadataReadTableEntry *metadata;
1785 if (klv_read_packet(&klv, s->pb) < 0) {
1786 /* EOF - seek to previous partition or stop */
1787 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1793 PRINT_KEY(s, "read header", klv.key);
1794 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1795 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1796 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1797 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1798 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1800 if (!mxf->current_partition) {
1801 av_log(mxf->fc, AV_LOG_ERROR,
1802 "found essence prior to first PartitionPack\n");
1803 return AVERROR_INVALIDDATA;
1806 if (!mxf->current_partition->essence_offset) {
1807 compute_partition_essence_offset(s, mxf, &klv);
1810 if (!essence_offset)
1811 essence_offset = klv.offset;
1813 /* seek to footer, previous partition or stop */
1814 if (mxf_parse_handle_essence(mxf) <= 0)
1817 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1818 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1819 /* next partition pack - keep going, seek to previous partition or stop */
1820 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1824 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1825 if (IS_KLV_KEY(klv.key, metadata->key)) {
1827 if (klv.key[5] == 0x53) {
1828 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1830 uint64_t next = avio_tell(s->pb) + klv.length;
1831 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1833 /* only seek forward, else this can loop for a long time */
1834 if (avio_tell(s->pb) > next) {
1835 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1837 return AVERROR_INVALIDDATA;
1840 avio_seek(s->pb, next, SEEK_SET);
1843 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1849 if (!metadata->read)
1850 avio_skip(s->pb, klv.length);
1852 /* FIXME avoid seek */
1853 if (!essence_offset) {
1854 av_log(s, AV_LOG_ERROR, "no essence\n");
1855 return AVERROR_INVALIDDATA;
1857 avio_seek(s->pb, essence_offset, SEEK_SET);
1859 mxf_compute_essence_containers(mxf);
1861 /* we need to do this before computing the index tables
1862 * to be able to fill in zero IndexDurations with st->duration */
1863 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1866 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1869 if (mxf->nb_index_tables > 1) {
1870 /* TODO: look up which IndexSID to use via EssenceContainerData */
1871 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1872 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1873 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1874 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1875 return AVERROR_INVALIDDATA;
1878 mxf_handle_small_eubc(s);
1884 * Sets mxf->current_edit_unit based on what offset we're currently at.
1885 * @return next_ofs if OK, <0 on error
1887 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1889 int64_t last_ofs = -1, next_ofs = -1;
1890 MXFIndexTable *t = &mxf->index_tables[0];
1892 /* this is called from the OP1a demuxing logic, which means there
1893 * may be no index tables */
1894 if (mxf->nb_index_tables <= 0)
1897 /* find mxf->current_edit_unit so that the next edit unit starts ahead
1898 * of current_offset */
1899 while (mxf->current_edit_unit >= 0) {
1900 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
1901 NULL, &next_ofs, 0) < 0)
1904 if (next_ofs <= last_ofs) {
1905 /* large next_ofs didn't change or current_edit_unit wrapped
1906 * around this fixes the infinite loop on zzuf3.mxf */
1907 av_log(mxf->fc, AV_LOG_ERROR,
1908 "next_ofs didn't change. not deriving packet timestamps\n");
1912 if (next_ofs > current_offset)
1915 last_ofs = next_ofs;
1916 mxf->current_edit_unit++;
1919 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
1920 * may lack IndexEntryArrays */
1921 if (mxf->current_edit_unit < 0)
1927 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1930 MXFContext *mxf = s->priv_data;
1932 while (!s->pb->eof_reached) {
1933 if (klv_read_packet(&klv, s->pb) < 0)
1935 PRINT_KEY(s, "read packet", klv.key);
1936 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1937 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1938 int res = mxf_decrypt_triplet(s, pkt, &klv);
1940 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1945 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1946 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1947 int index = mxf_get_stream_index(s, &klv);
1948 int64_t next_ofs, next_klv;
1951 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1954 if (s->streams[index]->discard == AVDISCARD_ALL)
1957 next_klv = avio_tell(s->pb) + klv.length;
1958 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
1960 if (next_ofs >= 0 && next_klv > next_ofs) {
1961 /* if this check is hit then it's possible OPAtom was treated
1962 * as OP1a truncate the packet since it's probably very large
1963 * (>2 GiB is common) */
1964 av_log_ask_for_sample(s,
1965 "KLV for edit unit %i extends into next "
1966 "edit unit - OPAtom misinterpreted as "
1968 mxf->current_edit_unit);
1969 klv.length = next_ofs - avio_tell(s->pb);
1972 /* check for 8 channels AES3 element */
1973 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1974 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1975 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1979 int ret = av_get_packet(s->pb, pkt, klv.length);
1983 pkt->stream_index = index;
1984 pkt->pos = klv.offset;
1986 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
1987 /* mxf->current_edit_unit good - see if we have an
1988 * index table to derive timestamps from */
1989 MXFIndexTable *t = &mxf->index_tables[0];
1991 if (mxf->nb_index_tables >= 1 &&
1992 mxf->current_edit_unit < t->nb_ptses) {
1993 pkt->dts = mxf->current_edit_unit + t->first_dts;
1994 pkt->pts = t->ptses[mxf->current_edit_unit];
1998 /* seek for truncated packets */
1999 avio_seek(s->pb, next_klv, SEEK_SET);
2004 avio_skip(s->pb, klv.length);
2009 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2011 MXFContext *mxf = s->priv_data;
2013 int64_t ret64, pos, next_pos;
2018 if (mxf->op != OPAtom)
2019 return mxf_read_packet_old(s, pkt);
2021 /* OPAtom - clip wrapped demuxing */
2022 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2024 t = &mxf->index_tables[0];
2026 if (mxf->current_edit_unit >= st->duration)
2029 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2031 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2034 /* compute size by finding the next edit unit or the end of the essence container
2035 * not pretty, but it works */
2036 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2037 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2038 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2039 return AVERROR_INVALIDDATA;
2042 if ((size = next_pos - pos) <= 0) {
2043 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2044 return AVERROR_INVALIDDATA;
2047 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2050 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2051 return ret < 0 ? ret : AVERROR_EOF;
2053 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2054 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2055 pkt->dts = mxf->current_edit_unit + t->first_dts;
2056 pkt->pts = t->ptses[mxf->current_edit_unit];
2059 pkt->stream_index = 0;
2060 mxf->current_edit_unit += edit_units;
2066 static int mxf_read_close(AVFormatContext *s)
2068 MXFContext *mxf = s->priv_data;
2069 MXFIndexTableSegment *seg;
2072 av_freep(&mxf->packages_refs);
2074 for (i = 0; i < s->nb_streams; i++)
2075 s->streams[i]->priv_data = NULL;
2077 for (i = 0; i < mxf->metadata_sets_count; i++) {
2078 switch (mxf->metadata_sets[i]->type) {
2079 case MultipleDescriptor:
2080 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2083 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2086 case MaterialPackage:
2087 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2089 case IndexTableSegment:
2090 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2091 av_freep(&seg->temporal_offset_entries);
2092 av_freep(&seg->flag_entries);
2093 av_freep(&seg->stream_offset_entries);
2098 av_freep(&mxf->metadata_sets[i]);
2100 av_freep(&mxf->partitions);
2101 av_freep(&mxf->metadata_sets);
2102 av_freep(&mxf->aesc);
2103 av_freep(&mxf->local_tags);
2105 for (i = 0; i < mxf->nb_index_tables; i++) {
2106 av_freep(&mxf->index_tables[i].segments);
2107 av_freep(&mxf->index_tables[i].ptses);
2108 av_freep(&mxf->index_tables[i].fake_index);
2110 av_freep(&mxf->index_tables);
2115 static int mxf_probe(AVProbeData *p) {
2116 uint8_t *bufp = p->buf;
2117 uint8_t *end = p->buf + p->buf_size;
2119 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2122 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2123 end -= sizeof(mxf_header_partition_pack_key);
2124 for (; bufp < end; bufp++) {
2125 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2126 return AVPROBE_SCORE_MAX;
2131 /* rudimentary byte seek */
2132 /* XXX: use MXF Index */
2133 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2135 AVStream *st = s->streams[stream_index];
2137 MXFContext* mxf = s->priv_data;
2142 if (mxf->index_tables <= 0) {
2144 return AVERROR_INVALIDDATA;
2145 if (sample_time < 0)
2147 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2149 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2151 ff_update_cur_dts(s, st, sample_time);
2153 t = &mxf->index_tables[0];
2155 /* clamp above zero, else ff_index_search_timestamp() returns negative
2156 * this also means we allow seeking before the start */
2157 sample_time = FFMAX(sample_time, 0);
2159 if (t->fake_index) {
2160 /* behave as if we have a proper index */
2161 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2164 /* no IndexEntryArray (one or more CBR segments)
2165 * make sure we don't seek past the end */
2166 sample_time = FFMIN(sample_time, st->duration - 1);
2169 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2172 ff_update_cur_dts(s, st, sample_time);
2173 mxf->current_edit_unit = sample_time;
2174 avio_seek(s->pb, seekpos, SEEK_SET);
2179 AVInputFormat ff_mxf_demuxer = {
2181 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2182 .priv_data_size = sizeof(MXFContext),
2183 .read_probe = mxf_probe,
2184 .read_header = mxf_read_header,
2185 .read_packet = mxf_read_packet,
2186 .read_close = mxf_read_close,
2187 .read_seek = mxf_read_seek,