3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
51 #include "libavutil/timecode.h"
73 OPSONYOpt, /* FATE sample, violates the spec in places */
79 MXFPartitionType type;
80 uint64_t previous_partition;
83 int64_t this_partition;
84 int64_t essence_offset; ///< absolute offset of essence
85 int64_t essence_length;
87 int64_t header_byte_count;
88 int64_t index_byte_count;
94 enum MXFMetadataSetType type;
95 UID source_container_ul;
100 enum MXFMetadataSetType type;
101 UID source_package_uid;
102 UID data_definition_ul;
104 int64_t start_position;
106 } MXFStructuralComponent;
110 enum MXFMetadataSetType type;
111 UID data_definition_ul;
112 UID *structural_components_refs;
113 int structural_components_count;
119 enum MXFMetadataSetType type;
122 struct AVRational rate;
124 } MXFTimecodeComponent;
128 enum MXFMetadataSetType type;
129 MXFSequence *sequence; /* mandatory, and only one */
132 uint8_t track_number[4];
133 AVRational edit_rate;
139 enum MXFMetadataSetType type;
140 UID essence_container_ul;
141 UID essence_codec_ul;
142 AVRational sample_rate;
143 AVRational aspect_ratio;
145 int height; /* Field height, not frame height */
146 int frame_layout; /* See MXFFrameLayout enum */
149 unsigned int component_depth;
150 unsigned int horiz_subsampling;
151 unsigned int vert_subsampling;
152 UID *sub_descriptors_refs;
153 int sub_descriptors_count;
157 enum PixelFormat pix_fmt;
162 enum MXFMetadataSetType type;
163 int edit_unit_byte_count;
166 AVRational index_edit_rate;
167 uint64_t index_start_position;
168 uint64_t index_duration;
169 int8_t *temporal_offset_entries;
171 uint64_t *stream_offset_entries;
172 int nb_index_entries;
173 } MXFIndexTableSegment;
177 enum MXFMetadataSetType type;
181 MXFDescriptor *descriptor; /* only one */
187 enum MXFMetadataSetType type;
190 /* decoded index table */
194 int nb_ptses; /* number of PTSes or total duration of index */
195 int64_t first_dts; /* DTS = EditUnit + first_dts */
196 int64_t *ptses; /* maps EditUnit -> PTS */
198 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
199 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
203 MXFPartition *partitions;
204 unsigned partitions_count;
208 MXFMetadataSet **metadata_sets;
209 int metadata_sets_count;
213 int local_tags_count;
214 uint64_t footer_partition;
215 KLVPacket current_klv_data;
216 int current_klv_index;
218 MXFPartition *current_partition;
219 int parsing_backward;
220 int64_t last_forward_tell;
221 int last_forward_partition;
222 int current_edit_unit;
224 MXFIndexTable *index_tables;
225 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
228 enum MXFWrappingScheme {
233 /* NOTE: klv_offset is not set (-1) for local keys */
234 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
238 MXFMetadataReadFunc *read;
240 enum MXFMetadataSetType type;
241 } MXFMetadataReadTableEntry;
243 /* partial keys to match */
244 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
245 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
246 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
247 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
248 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
249 /* complete keys to match */
250 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 };
251 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
252 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
253 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
255 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
257 static int64_t klv_decode_ber_length(AVIOContext *pb)
259 uint64_t size = avio_r8(pb);
260 if (size & 0x80) { /* long form */
261 int bytes_num = size & 0x7f;
262 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
264 return AVERROR_INVALIDDATA;
267 size = size << 8 | avio_r8(pb);
272 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
275 for (i = 0; i < size && !url_feof(pb); i++) {
279 else if (b != key[i])
285 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
287 if (!mxf_read_sync(pb, mxf_klv_key, 4))
288 return AVERROR_INVALIDDATA;
289 klv->offset = avio_tell(pb) - 4;
290 memcpy(klv->key, mxf_klv_key, 4);
291 avio_read(pb, klv->key + 4, 12);
292 klv->length = klv_decode_ber_length(pb);
293 return klv->length == -1 ? -1 : 0;
296 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
300 for (i = 0; i < s->nb_streams; i++) {
301 MXFTrack *track = s->streams[i]->priv_data;
303 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
306 /* return 0 if only one stream, for OP Atom files with 0 as track number */
307 return s->nb_streams == 1 ? 0 : -1;
310 /* XXX: use AVBitStreamFilter */
311 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
313 const uint8_t *buf_ptr, *end_ptr;
317 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
318 return AVERROR_INVALIDDATA;
319 length = av_get_packet(pb, pkt, length);
322 data_ptr = pkt->data;
323 end_ptr = pkt->data + length;
324 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
325 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
326 for (i = 0; i < st->codec->channels; i++) {
327 uint32_t sample = bytestream_get_le32(&buf_ptr);
328 if (st->codec->bits_per_coded_sample == 24)
329 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
331 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
333 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
335 av_shrink_packet(pkt, data_ptr - pkt->data);
339 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
341 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
342 MXFContext *mxf = s->priv_data;
343 AVIOContext *pb = s->pb;
344 int64_t end = avio_tell(pb) + klv->length;
347 uint64_t plaintext_size;
352 if (!mxf->aesc && s->key && s->keylen == 16) {
353 mxf->aesc = av_malloc(av_aes_size);
355 return AVERROR(ENOMEM);
356 av_aes_init(mxf->aesc, s->key, 128, 1);
359 avio_skip(pb, klv_decode_ber_length(pb));
361 klv_decode_ber_length(pb);
362 plaintext_size = avio_rb64(pb);
364 klv_decode_ber_length(pb);
365 avio_read(pb, klv->key, 16);
366 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
367 return AVERROR_INVALIDDATA;
368 index = mxf_get_stream_index(s, klv);
370 return AVERROR_INVALIDDATA;
372 klv_decode_ber_length(pb);
373 orig_size = avio_rb64(pb);
374 if (orig_size < plaintext_size)
375 return AVERROR_INVALIDDATA;
377 size = klv_decode_ber_length(pb);
378 if (size < 32 || size - 32 < orig_size)
379 return AVERROR_INVALIDDATA;
380 avio_read(pb, ivec, 16);
381 avio_read(pb, tmpbuf, 16);
383 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
384 if (memcmp(tmpbuf, checkv, 16))
385 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
387 size = av_get_packet(pb, pkt, size);
390 else if (size < plaintext_size)
391 return AVERROR_INVALIDDATA;
392 size -= plaintext_size;
394 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
395 &pkt->data[plaintext_size], size >> 4, ivec, 1);
396 av_shrink_packet(pkt, orig_size);
397 pkt->stream_index = index;
398 avio_skip(pb, end - avio_tell(pb));
402 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
404 MXFContext *mxf = arg;
405 int item_num = avio_rb32(pb);
406 int item_len = avio_rb32(pb);
408 if (item_len != 18) {
409 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
411 return AVERROR_PATCHWELCOME;
413 if (item_num > UINT_MAX / item_len)
414 return AVERROR_INVALIDDATA;
415 mxf->local_tags_count = item_num;
416 mxf->local_tags = av_malloc(item_num*item_len);
417 if (!mxf->local_tags)
418 return AVERROR(ENOMEM);
419 avio_read(pb, mxf->local_tags, item_num*item_len);
423 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
425 MXFContext *mxf = arg;
426 MXFPartition *partition, *tmp_part;
428 uint64_t footer_partition;
429 uint32_t nb_essence_containers;
431 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
432 return AVERROR(ENOMEM);
434 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
436 return AVERROR(ENOMEM);
437 mxf->partitions = tmp_part;
439 if (mxf->parsing_backward) {
440 /* insert the new partition pack in the middle
441 * this makes the entries in mxf->partitions sorted by offset */
442 memmove(&mxf->partitions[mxf->last_forward_partition+1],
443 &mxf->partitions[mxf->last_forward_partition],
444 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
445 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
447 mxf->last_forward_partition++;
448 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
451 memset(partition, 0, sizeof(*partition));
452 mxf->partitions_count++;
453 partition->pack_length = avio_tell(pb) - klv_offset + size;
457 partition->type = Header;
460 partition->type = BodyPartition;
463 partition->type = Footer;
466 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
467 return AVERROR_INVALIDDATA;
470 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
471 partition->closed = partition->type == Footer || !(uid[14] & 1);
472 partition->complete = uid[14] > 2;
474 partition->kag_size = avio_rb32(pb);
475 partition->this_partition = avio_rb64(pb);
476 partition->previous_partition = avio_rb64(pb);
477 footer_partition = avio_rb64(pb);
478 partition->header_byte_count = avio_rb64(pb);
479 partition->index_byte_count = avio_rb64(pb);
480 partition->index_sid = avio_rb32(pb);
482 partition->body_sid = avio_rb32(pb);
483 avio_read(pb, op, sizeof(UID));
484 nb_essence_containers = avio_rb32(pb);
486 /* some files don'thave FooterPartition set in every partition */
487 if (footer_partition) {
488 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
489 av_log(mxf->fc, AV_LOG_ERROR,
490 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
491 mxf->footer_partition, footer_partition);
493 mxf->footer_partition = footer_partition;
498 "PartitionPack: ThisPartition = 0x%"PRIX64
499 ", PreviousPartition = 0x%"PRIX64", "
500 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
501 partition->this_partition,
502 partition->previous_partition, footer_partition,
503 partition->index_sid, partition->body_sid);
505 /* sanity check PreviousPartition if set */
506 if (partition->previous_partition &&
507 mxf->run_in + partition->previous_partition >= klv_offset) {
508 av_log(mxf->fc, AV_LOG_ERROR,
509 "PreviousPartition points to this partition or forward\n");
510 return AVERROR_INVALIDDATA;
513 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
514 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
515 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
516 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
517 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
518 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
519 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
520 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
521 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
522 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
523 else if (op[12] == 0x10) {
524 /* SMPTE 390m: "There shall be exactly one essence container"
525 * The following block deals with files that violate this, namely:
526 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
527 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
528 if (nb_essence_containers != 1) {
529 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
533 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
534 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
540 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
544 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
545 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
547 if (mxf->op == OPSONYOpt)
548 partition->kag_size = 512;
550 partition->kag_size = 1;
552 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
558 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
560 MXFMetadataSet **tmp;
561 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
562 return AVERROR(ENOMEM);
563 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
565 return AVERROR(ENOMEM);
566 mxf->metadata_sets = tmp;
567 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
568 mxf->metadata_sets_count++;
572 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
574 MXFCryptoContext *cryptocontext = arg;
576 return AVERROR_INVALIDDATA;
577 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
578 avio_read(pb, cryptocontext->source_container_ul, 16);
582 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
584 MXFContext *mxf = arg;
587 mxf->packages_count = avio_rb32(pb);
588 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
589 return AVERROR_INVALIDDATA;
590 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
591 if (!mxf->packages_refs)
592 return AVERROR(ENOMEM);
593 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
594 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
600 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
602 MXFStructuralComponent *source_clip = arg;
605 source_clip->duration = avio_rb64(pb);
608 source_clip->start_position = avio_rb64(pb);
611 /* UMID, only get last 16 bytes */
613 avio_read(pb, source_clip->source_package_uid, 16);
616 source_clip->source_track_id = avio_rb32(pb);
622 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
624 MXFPackage *package = arg;
627 package->tracks_count = avio_rb32(pb);
628 if (package->tracks_count >= UINT_MAX / sizeof(UID))
629 return AVERROR_INVALIDDATA;
630 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
631 if (!package->tracks_refs)
632 return AVERROR(ENOMEM);
633 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
634 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
640 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
642 MXFTimecodeComponent *mxf_timecode = arg;
645 mxf_timecode->start_frame = avio_rb64(pb);
648 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
651 mxf_timecode->drop_frame = avio_r8(pb);
657 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
659 MXFTrack *track = arg;
662 track->track_id = avio_rb32(pb);
665 avio_read(pb, track->track_number, 4);
668 track->edit_rate.num = avio_rb32(pb);
669 track->edit_rate.den = avio_rb32(pb);
672 avio_read(pb, track->sequence_ref, 16);
678 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
680 MXFSequence *sequence = arg;
683 sequence->duration = avio_rb64(pb);
686 avio_read(pb, sequence->data_definition_ul, 16);
689 sequence->structural_components_count = avio_rb32(pb);
690 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
691 return AVERROR_INVALIDDATA;
692 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
693 if (!sequence->structural_components_refs)
694 return AVERROR(ENOMEM);
695 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
696 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
702 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
704 MXFPackage *package = arg;
707 package->tracks_count = avio_rb32(pb);
708 if (package->tracks_count >= UINT_MAX / sizeof(UID))
709 return AVERROR_INVALIDDATA;
710 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
711 if (!package->tracks_refs)
712 return AVERROR(ENOMEM);
713 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
714 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
717 /* UMID, only get last 16 bytes */
719 avio_read(pb, package->package_uid, 16);
722 avio_read(pb, package->descriptor_ref, 16);
728 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
732 segment->nb_index_entries = avio_rb32(pb);
733 length = avio_rb32(pb);
735 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
736 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
737 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
738 return AVERROR(ENOMEM);
740 for (i = 0; i < segment->nb_index_entries; i++) {
741 segment->temporal_offset_entries[i] = avio_r8(pb);
742 avio_r8(pb); /* KeyFrameOffset */
743 segment->flag_entries[i] = avio_r8(pb);
744 segment->stream_offset_entries[i] = avio_rb64(pb);
745 avio_skip(pb, length - 11);
750 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
752 MXFIndexTableSegment *segment = arg;
755 segment->edit_unit_byte_count = avio_rb32(pb);
756 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
759 segment->index_sid = avio_rb32(pb);
760 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
763 segment->body_sid = avio_rb32(pb);
764 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
767 av_dlog(NULL, "IndexEntryArray found\n");
768 return mxf_read_index_entry_array(pb, segment);
770 segment->index_edit_rate.num = avio_rb32(pb);
771 segment->index_edit_rate.den = avio_rb32(pb);
772 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
773 segment->index_edit_rate.den);
776 segment->index_start_position = avio_rb64(pb);
777 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
780 segment->index_duration = avio_rb64(pb);
781 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
787 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
789 int code, value, ofs = 0;
790 char layout[16] = {0};
795 av_dlog(NULL, "pixel layout: code %#x\n", code);
798 layout[ofs++] = code;
799 layout[ofs++] = value;
801 } while (code != 0); /* SMPTE 377M E.2.46 */
803 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
806 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
808 MXFDescriptor *descriptor = arg;
809 descriptor->pix_fmt = PIX_FMT_NONE;
812 descriptor->sub_descriptors_count = avio_rb32(pb);
813 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
814 return AVERROR_INVALIDDATA;
815 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
816 if (!descriptor->sub_descriptors_refs)
817 return AVERROR(ENOMEM);
818 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
819 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
822 avio_read(pb, descriptor->essence_container_ul, 16);
825 descriptor->linked_track_id = avio_rb32(pb);
827 case 0x3201: /* PictureEssenceCoding */
828 avio_read(pb, descriptor->essence_codec_ul, 16);
831 descriptor->width = avio_rb32(pb);
834 descriptor->height = avio_rb32(pb);
837 descriptor->frame_layout = avio_r8(pb);
840 descriptor->aspect_ratio.num = avio_rb32(pb);
841 descriptor->aspect_ratio.den = avio_rb32(pb);
844 descriptor->component_depth = avio_rb32(pb);
847 descriptor->horiz_subsampling = avio_rb32(pb);
850 descriptor->vert_subsampling = avio_rb32(pb);
853 descriptor->sample_rate.num = avio_rb32(pb);
854 descriptor->sample_rate.den = avio_rb32(pb);
856 case 0x3D06: /* SoundEssenceCompression */
857 avio_read(pb, descriptor->essence_codec_ul, 16);
860 descriptor->channels = avio_rb32(pb);
863 descriptor->bits_per_sample = avio_rb32(pb);
866 mxf_read_pixel_layout(pb, descriptor);
869 /* Private uid used by SONY C0023S01.mxf */
870 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
871 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
872 if (!descriptor->extradata)
873 return AVERROR(ENOMEM);
874 descriptor->extradata_size = size;
875 avio_read(pb, descriptor->extradata, size);
883 * Match an uid independently of the version byte and up to len common bytes
886 static int mxf_match_uid(const UID key, const UID uid, int len)
889 for (i = 0; i < len; i++) {
890 if (i != 7 && key[i] != uid[i])
896 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
898 while (uls->uid[0]) {
899 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
906 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
912 for (i = 0; i < mxf->metadata_sets_count; i++) {
913 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
914 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
915 return mxf->metadata_sets[i];
921 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
922 // video essence container uls
923 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
924 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
925 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
926 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
929 /* EC ULs for intra-only formats */
930 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
931 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
932 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
935 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
936 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
937 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
938 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
941 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
942 // sound essence container uls
943 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
944 { { 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 */
945 { { 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 */
946 { { 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 */
947 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
950 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
952 int i, j, nb_segments = 0;
953 MXFIndexTableSegment **unsorted_segments;
954 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
956 /* count number of segments, allocate arrays and copy unsorted segments */
957 for (i = 0; i < mxf->metadata_sets_count; i++)
958 if (mxf->metadata_sets[i]->type == IndexTableSegment)
961 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
962 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
963 av_freep(sorted_segments);
964 av_free(unsorted_segments);
965 return AVERROR(ENOMEM);
968 for (i = j = 0; i < mxf->metadata_sets_count; i++)
969 if (mxf->metadata_sets[i]->type == IndexTableSegment)
970 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
972 *nb_sorted_segments = 0;
974 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
975 for (i = 0; i < nb_segments; i++) {
976 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
978 for (j = 0; j < nb_segments; j++) {
979 MXFIndexTableSegment *s = unsorted_segments[j];
981 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
982 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
984 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
985 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
987 best_body_sid = s->body_sid;
988 best_index_sid = s->index_sid;
989 best_index_start = s->index_start_position;
993 /* no suitable entry found -> we're done */
997 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
998 last_body_sid = best_body_sid;
999 last_index_sid = best_index_sid;
1000 last_index_start = best_index_start;
1003 av_free(unsorted_segments);
1009 * Computes the absolute file offset of the given essence container offset
1011 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1014 int64_t offset_in = offset; /* for logging */
1016 for (x = 0; x < mxf->partitions_count; x++) {
1017 MXFPartition *p = &mxf->partitions[x];
1019 if (p->body_sid != body_sid)
1022 if (offset < p->essence_length || !p->essence_length) {
1023 *offset_out = p->essence_offset + offset;
1027 offset -= p->essence_length;
1030 av_log(mxf->fc, AV_LOG_ERROR,
1031 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1032 offset_in, body_sid);
1034 return AVERROR_INVALIDDATA;
1038 * Returns the end position of the essence container with given BodySID, or zero if unknown
1040 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1045 for (x = 0; x < mxf->partitions_count; x++) {
1046 MXFPartition *p = &mxf->partitions[x];
1048 if (p->body_sid != body_sid)
1051 if (!p->essence_length)
1054 ret = p->essence_offset + p->essence_length;
1060 /* EditUnit -> absolute offset */
1061 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)
1064 int64_t offset_temp = 0;
1066 for (i = 0; i < index_table->nb_segments; i++) {
1067 MXFIndexTableSegment *s = index_table->segments[i];
1069 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1071 if (edit_unit < s->index_start_position + s->index_duration) {
1072 int64_t index = edit_unit - s->index_start_position;
1074 if (s->edit_unit_byte_count)
1075 offset_temp += s->edit_unit_byte_count * index;
1076 else if (s->nb_index_entries) {
1077 if (s->nb_index_entries == 2 * s->index_duration + 1)
1078 index *= 2; /* Avid index */
1080 if (index < 0 || index >= s->nb_index_entries) {
1081 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1082 index_table->index_sid, s->index_start_position);
1083 return AVERROR_INVALIDDATA;
1086 offset_temp = s->stream_offset_entries[index];
1088 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1089 index_table->index_sid, s->index_start_position);
1090 return AVERROR_INVALIDDATA;
1094 *edit_unit_out = edit_unit;
1096 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1098 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1099 offset_temp += s->edit_unit_byte_count * s->index_duration;
1104 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);
1106 return AVERROR_INVALIDDATA;
1109 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1112 int8_t max_temporal_offset = -128;
1114 /* first compute how many entries we have */
1115 for (i = 0; i < index_table->nb_segments; i++) {
1116 MXFIndexTableSegment *s = index_table->segments[i];
1118 if (!s->nb_index_entries) {
1119 index_table->nb_ptses = 0;
1120 return 0; /* no TemporalOffsets */
1123 index_table->nb_ptses += s->index_duration;
1126 /* paranoid check */
1127 if (index_table->nb_ptses <= 0)
1130 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1131 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1132 av_freep(&index_table->ptses);
1133 return AVERROR(ENOMEM);
1136 /* we may have a few bad TemporalOffsets
1137 * make sure the corresponding PTSes don't have the bogus value 0 */
1138 for (x = 0; x < index_table->nb_ptses; x++)
1139 index_table->ptses[x] = AV_NOPTS_VALUE;
1153 * We want to transform it into this:
1164 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1165 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1166 * The latter makes DTS <= PTS.
1168 for (i = x = 0; i < index_table->nb_segments; i++) {
1169 MXFIndexTableSegment *s = index_table->segments[i];
1170 int index_delta = 1;
1171 int n = s->nb_index_entries;
1173 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1174 index_delta = 2; /* Avid index */
1175 /* ignore the last entry - it's the size of the essence container */
1179 for (j = 0; j < n; j += index_delta, x++) {
1180 int offset = s->temporal_offset_entries[j] / index_delta;
1181 int index = x + offset;
1183 if (x >= index_table->nb_ptses) {
1184 av_log(mxf->fc, AV_LOG_ERROR,
1185 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1186 s->nb_index_entries, s->index_duration);
1190 index_table->fake_index[x].timestamp = x;
1191 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1193 if (index < 0 || index >= index_table->nb_ptses) {
1194 av_log(mxf->fc, AV_LOG_ERROR,
1195 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1200 index_table->ptses[index] = x;
1201 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1205 index_table->first_dts = -max_temporal_offset;
1211 * Sorts and collects index table segments into index tables.
1212 * Also computes PTSes if possible.
1214 static int mxf_compute_index_tables(MXFContext *mxf)
1216 int i, j, k, ret, nb_sorted_segments;
1217 MXFIndexTableSegment **sorted_segments = NULL;
1219 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1220 nb_sorted_segments <= 0) {
1221 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1225 /* sanity check and count unique BodySIDs/IndexSIDs */
1226 for (i = 0; i < nb_sorted_segments; i++) {
1227 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1228 mxf->nb_index_tables++;
1229 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1230 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1231 ret = AVERROR_INVALIDDATA;
1232 goto finish_decoding_index;
1236 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1237 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1238 ret = AVERROR(ENOMEM);
1239 goto finish_decoding_index;
1242 /* distribute sorted segments to index tables */
1243 for (i = j = 0; i < nb_sorted_segments; i++) {
1244 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1249 mxf->index_tables[j].nb_segments++;
1252 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1253 MXFIndexTable *t = &mxf->index_tables[j];
1255 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1256 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1257 ret = AVERROR(ENOMEM);
1258 goto finish_decoding_index;
1261 if (sorted_segments[i]->index_start_position)
1262 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1263 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1265 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1266 t->index_sid = sorted_segments[i]->index_sid;
1267 t->body_sid = sorted_segments[i]->body_sid;
1269 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1270 goto finish_decoding_index;
1272 /* fix zero IndexDurations */
1273 for (k = 0; k < t->nb_segments; k++) {
1274 if (t->segments[k]->index_duration)
1277 if (t->nb_segments > 1)
1278 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1281 if (mxf->fc->nb_streams <= 0) {
1282 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1286 /* assume the first stream's duration is reasonable
1287 * leave index_duration = 0 on further segments in case we have any (unlikely)
1289 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1295 finish_decoding_index:
1296 av_free(sorted_segments);
1300 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1302 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1303 &descriptor->essence_container_ul)->id != CODEC_ID_NONE ||
1304 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1305 &descriptor->essence_codec_ul)->id != CODEC_ID_NONE;
1308 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1310 char buf[AV_TIMECODE_STR_SIZE];
1311 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1316 static int mxf_parse_structural_metadata(MXFContext *mxf)
1318 MXFPackage *material_package = NULL;
1319 MXFPackage *temp_package = NULL;
1322 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1323 /* TODO: handle multiple material packages (OP3x) */
1324 for (i = 0; i < mxf->packages_count; i++) {
1325 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1326 if (material_package) break;
1328 if (!material_package) {
1329 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1330 return AVERROR_INVALIDDATA;
1333 for (i = 0; i < material_package->tracks_count; i++) {
1334 MXFPackage *source_package = NULL;
1335 MXFTrack *material_track = NULL;
1336 MXFTrack *source_track = NULL;
1337 MXFTrack *temp_track = NULL;
1338 MXFDescriptor *descriptor = NULL;
1339 MXFStructuralComponent *component = NULL;
1340 MXFTimecodeComponent *mxf_tc = NULL;
1341 UID *essence_container_ul = NULL;
1342 const MXFCodecUL *codec_ul = NULL;
1343 const MXFCodecUL *container_ul = NULL;
1344 const MXFCodecUL *pix_fmt_ul = NULL;
1349 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1350 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1354 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1355 mxf_tc = (MXFTimecodeComponent*)component;
1356 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1357 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1358 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1362 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1363 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1367 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1368 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1372 mxf_tc = (MXFTimecodeComponent*)component;
1373 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1374 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1375 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1380 /* TODO: handle multiple source clips */
1381 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1382 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1386 for (k = 0; k < mxf->packages_count; k++) {
1387 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1390 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1391 source_package = temp_package;
1395 if (!source_package) {
1396 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1399 for (k = 0; k < source_package->tracks_count; k++) {
1400 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1401 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1402 ret = AVERROR_INVALIDDATA;
1405 if (temp_track->track_id == component->source_track_id) {
1406 source_track = temp_track;
1410 if (!source_track) {
1411 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1415 if (!source_track || !component)
1418 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1419 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1420 ret = AVERROR_INVALIDDATA;
1424 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1425 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1426 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1427 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1431 st = avformat_new_stream(mxf->fc, NULL);
1433 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1434 ret = AVERROR(ENOMEM);
1437 st->id = source_track->track_id;
1438 st->priv_data = source_track;
1439 st->duration = component->duration;
1440 if (st->duration == -1)
1441 st->duration = AV_NOPTS_VALUE;
1442 st->start_time = component->start_position;
1443 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1445 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1446 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1447 st->codec->codec_type = codec_ul->id;
1449 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1450 if (source_package->descriptor) {
1451 if (source_package->descriptor->type == MultipleDescriptor) {
1452 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1453 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1455 if (!sub_descriptor) {
1456 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1459 if (sub_descriptor->linked_track_id == source_track->track_id) {
1460 descriptor = sub_descriptor;
1464 } else if (source_package->descriptor->type == Descriptor)
1465 descriptor = source_package->descriptor;
1468 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1471 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1472 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1473 essence_container_ul = &descriptor->essence_container_ul;
1474 /* HACK: replacing the original key with mxf_encrypted_essence_container
1475 * is not allowed according to s429-6, try to find correct information anyway */
1476 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1477 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1478 for (k = 0; k < mxf->metadata_sets_count; k++) {
1479 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1480 if (metadata->type == CryptoContext) {
1481 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1487 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1488 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1489 st->codec->codec_id = codec_ul->id;
1490 if (descriptor->extradata) {
1491 st->codec->extradata = descriptor->extradata;
1492 st->codec->extradata_size = descriptor->extradata_size;
1494 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1495 source_track->intra_only = mxf_is_intra_only(descriptor);
1496 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1497 if (st->codec->codec_id == CODEC_ID_NONE)
1498 st->codec->codec_id = container_ul->id;
1499 st->codec->width = descriptor->width;
1500 st->codec->height = descriptor->height; /* Field height, not frame height */
1501 switch (descriptor->frame_layout) {
1502 case SegmentedFrame:
1503 /* This one is a weird layout I don't fully understand. */
1504 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1509 /* Every other line is stored and needs to be duplicated. */
1510 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1511 break; /* The correct thing to do here is fall through, but by breaking we might be
1512 able to decode some streams at half the vertical resolution, rather than not al all.
1513 It's also for compatibility with the old behavior. */
1514 case SeparateFields:
1516 st->codec->height *= 2; /* Turn field height into frame height. */
1518 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1520 if (st->codec->codec_id == CODEC_ID_RAWVIDEO) {
1521 st->codec->pix_fmt = descriptor->pix_fmt;
1522 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1523 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls, &descriptor->essence_codec_ul);
1524 st->codec->pix_fmt = pix_fmt_ul->id;
1525 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1526 /* support files created before RP224v10 by defaulting to UYVY422
1527 if subsampling is 4:2:2 and component depth is 8-bit */
1528 if (descriptor->horiz_subsampling == 2 &&
1529 descriptor->vert_subsampling == 1 &&
1530 descriptor->component_depth == 8) {
1531 st->codec->pix_fmt = PIX_FMT_UYVY422;
1536 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1537 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1538 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1539 if (st->codec->codec_id == CODEC_ID_NONE)
1540 st->codec->codec_id = container_ul->id;
1541 st->codec->channels = descriptor->channels;
1542 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1544 if (descriptor->sample_rate.den > 0)
1545 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1547 /* TODO: implement CODEC_ID_RAWAUDIO */
1548 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1549 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1550 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1551 else if (descriptor->bits_per_sample == 32)
1552 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1553 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1554 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1555 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1556 else if (descriptor->bits_per_sample == 32)
1557 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1558 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1559 st->need_parsing = AVSTREAM_PARSE_FULL;
1562 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1563 /* TODO: decode timestamps */
1564 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1573 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1574 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1575 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1576 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1577 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1578 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1579 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1580 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1591 { { 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 */
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1593 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1594 { { 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 */
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1596 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1597 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1598 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1599 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1600 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1601 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1602 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1605 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1607 AVIOContext *pb = mxf->fc->pb;
1608 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1609 uint64_t klv_end = avio_tell(pb) + klv->length;
1612 return AVERROR(ENOMEM);
1613 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1615 int tag = avio_rb16(pb);
1616 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1617 uint64_t next = avio_tell(pb) + size;
1620 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1621 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1622 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1625 if (tag > 0x7FFF) { /* dynamic tag */
1627 for (i = 0; i < mxf->local_tags_count; i++) {
1628 int local_tag = AV_RB16(mxf->local_tags+i*18);
1629 if (local_tag == tag) {
1630 memcpy(uid, mxf->local_tags+i*18+2, 16);
1631 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1632 PRINT_KEY(mxf->fc, "uid", uid);
1636 if (ctx_size && tag == 0x3C0A)
1637 avio_read(pb, ctx->uid, 16);
1638 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1641 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1642 * it extending past the end of the KLV though (zzuf5.mxf). */
1643 if (avio_tell(pb) > klv_end) {
1644 av_log(mxf->fc, AV_LOG_ERROR,
1645 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1647 return AVERROR_INVALIDDATA;
1648 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1649 avio_seek(pb, next, SEEK_SET);
1651 if (ctx_size) ctx->type = type;
1652 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1656 * Seeks to the previous partition, if possible
1657 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1659 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1661 AVIOContext *pb = mxf->fc->pb;
1663 if (!mxf->current_partition ||
1664 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1665 return 0; /* we've parsed all partitions */
1667 /* seek to previous partition */
1668 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1669 mxf->current_partition = NULL;
1671 av_dlog(mxf->fc, "seeking to previous partition\n");
1677 * Called when essence is encountered
1678 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1680 static int mxf_parse_handle_essence(MXFContext *mxf)
1682 AVIOContext *pb = mxf->fc->pb;
1685 if (mxf->parsing_backward) {
1686 return mxf_seek_to_previous_partition(mxf);
1688 if (!mxf->footer_partition) {
1689 av_dlog(mxf->fc, "no footer\n");
1693 av_dlog(mxf->fc, "seeking to footer\n");
1695 /* remember where we were so we don't end up seeking further back than this */
1696 mxf->last_forward_tell = avio_tell(pb);
1698 if (!pb->seekable) {
1699 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1703 /* seek to footer partition and parse backward */
1704 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1705 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1706 mxf->run_in + mxf->footer_partition, ret);
1710 mxf->current_partition = NULL;
1711 mxf->parsing_backward = 1;
1718 * Called when the next partition or EOF is encountered
1719 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1721 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1723 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1727 * Figures out the proper offset and length of the essence container in each partition
1729 static void mxf_compute_essence_containers(MXFContext *mxf)
1733 /* everything is already correct */
1734 if (mxf->op == OPAtom)
1737 for (x = 0; x < mxf->partitions_count; x++) {
1738 MXFPartition *p = &mxf->partitions[x];
1741 continue; /* BodySID == 0 -> no essence */
1743 if (x >= mxf->partitions_count - 1)
1744 break; /* last partition - can't compute length (and we don't need to) */
1746 /* essence container spans to the next partition */
1747 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1749 if (p->essence_length < 0) {
1750 /* next ThisPartition < essence_offset */
1751 p->essence_length = 0;
1752 av_log(mxf->fc, AV_LOG_ERROR,
1753 "partition %i: bad ThisPartition = %"PRIX64"\n",
1754 x+1, mxf->partitions[x+1].this_partition);
1759 static int64_t round_to_kag(int64_t position, int kag_size)
1761 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1762 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1763 int64_t ret = (position / kag_size) * kag_size;
1764 return ret == position ? ret : ret + kag_size;
1767 static int is_pcm(enum CodecID codec_id)
1769 /* we only care about "normal" PCM codecs until we get samples */
1770 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1774 * Deal with the case where for some audio atoms EditUnitByteCount is
1775 * very small (2, 4..). In those cases we should read more than one
1776 * sample per call to mxf_read_packet().
1778 static void mxf_handle_small_eubc(AVFormatContext *s)
1780 MXFContext *mxf = s->priv_data;
1782 /* assuming non-OPAtom == frame wrapped
1783 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1784 if (mxf->op != OPAtom)
1787 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1788 if (s->nb_streams != 1 ||
1789 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1790 !is_pcm(s->streams[0]->codec->codec_id) ||
1791 mxf->nb_index_tables != 1 ||
1792 mxf->index_tables[0].nb_segments != 1 ||
1793 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1796 /* arbitrarily default to 48 kHz PAL audio frame size */
1797 /* TODO: We could compute this from the ratio between the audio
1798 * and video edit rates for 48 kHz NTSC we could use the
1799 * 1802-1802-1802-1802-1801 pattern. */
1800 mxf->edit_units_per_packet = 1920;
1803 static int mxf_read_header(AVFormatContext *s)
1805 MXFContext *mxf = s->priv_data;
1807 int64_t essence_offset = 0;
1810 mxf->last_forward_tell = INT64_MAX;
1811 mxf->edit_units_per_packet = 1;
1813 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1814 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1815 return AVERROR_INVALIDDATA;
1817 avio_seek(s->pb, -14, SEEK_CUR);
1819 mxf->run_in = avio_tell(s->pb);
1821 while (!url_feof(s->pb)) {
1822 const MXFMetadataReadTableEntry *metadata;
1824 if (klv_read_packet(&klv, s->pb) < 0) {
1825 /* EOF - seek to previous partition or stop */
1826 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1832 PRINT_KEY(s, "read header", klv.key);
1833 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1834 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1835 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1836 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1837 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1839 if (!mxf->current_partition) {
1840 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1841 return AVERROR_INVALIDDATA;
1844 if (!mxf->current_partition->essence_offset) {
1845 /* for OP1a we compute essence_offset
1846 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1847 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1848 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1850 int64_t op1a_essence_offset =
1851 round_to_kag(mxf->current_partition->this_partition +
1852 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1853 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1854 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1856 if (mxf->op == OPAtom) {
1857 /* point essence_offset to the actual data
1858 * OPAtom has all the essence in one big KLV
1860 mxf->current_partition->essence_offset = avio_tell(s->pb);
1861 mxf->current_partition->essence_length = klv.length;
1863 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1864 mxf->current_partition->essence_offset = op1a_essence_offset;
1868 if (!essence_offset)
1869 essence_offset = klv.offset;
1871 /* seek to footer, previous partition or stop */
1872 if (mxf_parse_handle_essence(mxf) <= 0)
1875 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1876 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1877 /* next partition pack - keep going, seek to previous partition or stop */
1878 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1880 else if (mxf->parsing_backward)
1882 /* we're still parsing forward. proceed to parsing this partition pack */
1885 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1886 if (IS_KLV_KEY(klv.key, metadata->key)) {
1888 if (klv.key[5] == 0x53) {
1889 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1891 uint64_t next = avio_tell(s->pb) + klv.length;
1892 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1894 /* only seek forward, else this can loop for a long time */
1895 if (avio_tell(s->pb) > next) {
1896 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1898 return AVERROR_INVALIDDATA;
1901 avio_seek(s->pb, next, SEEK_SET);
1904 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1910 if (!metadata->read)
1911 avio_skip(s->pb, klv.length);
1913 /* FIXME avoid seek */
1914 if (!essence_offset) {
1915 av_log(s, AV_LOG_ERROR, "no essence\n");
1916 return AVERROR_INVALIDDATA;
1918 avio_seek(s->pb, essence_offset, SEEK_SET);
1920 mxf_compute_essence_containers(mxf);
1922 /* we need to do this before computing the index tables
1923 * to be able to fill in zero IndexDurations with st->duration */
1924 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1927 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1930 if (mxf->nb_index_tables > 1) {
1931 /* TODO: look up which IndexSID to use via EssenceContainerData */
1932 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1933 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1934 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1935 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1936 return AVERROR_INVALIDDATA;
1939 mxf_handle_small_eubc(s);
1945 * Sets mxf->current_edit_unit based on what offset we're currently at.
1946 * @return next_ofs if OK, <0 on error
1948 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1950 int64_t last_ofs = -1, next_ofs = -1;
1951 MXFIndexTable *t = &mxf->index_tables[0];
1953 /* this is called from the OP1a demuxing logic, which means there
1954 * may be no index tables */
1955 if (mxf->nb_index_tables <= 0)
1958 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
1959 while (mxf->current_edit_unit >= 0) {
1960 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1963 if (next_ofs <= last_ofs) {
1964 /* large next_ofs didn't change or current_edit_unit wrapped
1965 * around this fixes the infinite loop on zzuf3.mxf */
1966 av_log(mxf->fc, AV_LOG_ERROR,
1967 "next_ofs didn't change. not deriving packet timestamps\n");
1971 if (next_ofs > current_offset)
1974 last_ofs = next_ofs;
1975 mxf->current_edit_unit++;
1978 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
1979 if (mxf->current_edit_unit < 0)
1985 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1988 MXFContext *mxf = s->priv_data;
1990 while (!url_feof(s->pb)) {
1992 if (klv_read_packet(&klv, s->pb) < 0)
1994 PRINT_KEY(s, "read packet", klv.key);
1995 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1996 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1997 ret = mxf_decrypt_triplet(s, pkt, &klv);
1999 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2000 return AVERROR_INVALIDDATA;
2004 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2005 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2006 int index = mxf_get_stream_index(s, &klv);
2007 int64_t next_ofs, next_klv;
2012 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2016 st = s->streams[index];
2017 track = st->priv_data;
2019 if (s->streams[index]->discard == AVDISCARD_ALL)
2022 next_klv = avio_tell(s->pb) + klv.length;
2023 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2025 if (next_ofs >= 0 && next_klv > next_ofs) {
2026 /* if this check is hit then it's possible OPAtom was treated as OP1a
2027 * truncate the packet since it's probably very large (>2 GiB is common) */
2028 av_log_ask_for_sample(s,
2029 "KLV for edit unit %i extends into next edit unit - OPAtom misinterpreted as OP1a?\n",
2030 mxf->current_edit_unit);
2031 klv.length = next_ofs - avio_tell(s->pb);
2034 /* check for 8 channels AES3 element */
2035 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2036 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2037 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2038 return AVERROR_INVALIDDATA;
2041 ret = av_get_packet(s->pb, pkt, klv.length);
2045 pkt->stream_index = index;
2046 pkt->pos = klv.offset;
2048 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2049 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2050 MXFIndexTable *t = &mxf->index_tables[0];
2052 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2053 pkt->dts = mxf->current_edit_unit + t->first_dts;
2054 pkt->pts = t->ptses[mxf->current_edit_unit];
2055 } else if (track->intra_only) {
2056 /* intra-only -> PTS = EditUnit.
2057 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2058 pkt->pts = mxf->current_edit_unit;
2062 /* seek for truncated packets */
2063 avio_seek(s->pb, next_klv, SEEK_SET);
2068 avio_skip(s->pb, klv.length);
2073 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2075 MXFContext *mxf = s->priv_data;
2077 int64_t ret64, pos, next_pos;
2082 if (mxf->op != OPAtom)
2083 return mxf_read_packet_old(s, pkt);
2085 /* OPAtom - clip wrapped demuxing */
2086 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2088 t = &mxf->index_tables[0];
2090 if (mxf->current_edit_unit >= st->duration)
2093 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2095 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2098 /* compute size by finding the next edit unit or the end of the essence container
2099 * not pretty, but it works */
2100 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2101 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2102 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2103 return AVERROR_INVALIDDATA;
2106 if ((size = next_pos - pos) <= 0) {
2107 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2108 return AVERROR_INVALIDDATA;
2111 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2114 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2115 return ret < 0 ? ret : AVERROR_EOF;
2117 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2118 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2119 pkt->dts = mxf->current_edit_unit + t->first_dts;
2120 pkt->pts = t->ptses[mxf->current_edit_unit];
2123 pkt->stream_index = 0;
2124 mxf->current_edit_unit += edit_units;
2129 static int mxf_read_close(AVFormatContext *s)
2131 MXFContext *mxf = s->priv_data;
2132 MXFIndexTableSegment *seg;
2135 av_freep(&mxf->packages_refs);
2137 for (i = 0; i < s->nb_streams; i++)
2138 s->streams[i]->priv_data = NULL;
2140 for (i = 0; i < mxf->metadata_sets_count; i++) {
2141 switch (mxf->metadata_sets[i]->type) {
2142 case MultipleDescriptor:
2143 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2146 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2149 case MaterialPackage:
2150 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2152 case IndexTableSegment:
2153 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2154 av_freep(&seg->temporal_offset_entries);
2155 av_freep(&seg->flag_entries);
2156 av_freep(&seg->stream_offset_entries);
2161 av_freep(&mxf->metadata_sets[i]);
2163 av_freep(&mxf->partitions);
2164 av_freep(&mxf->metadata_sets);
2165 av_freep(&mxf->aesc);
2166 av_freep(&mxf->local_tags);
2168 for (i = 0; i < mxf->nb_index_tables; i++) {
2169 av_freep(&mxf->index_tables[i].segments);
2170 av_freep(&mxf->index_tables[i].ptses);
2171 av_freep(&mxf->index_tables[i].fake_index);
2173 av_freep(&mxf->index_tables);
2178 static int mxf_probe(AVProbeData *p) {
2179 uint8_t *bufp = p->buf;
2180 uint8_t *end = p->buf + p->buf_size;
2182 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2185 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2186 end -= sizeof(mxf_header_partition_pack_key);
2187 for (; bufp < end; bufp++) {
2188 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2189 return AVPROBE_SCORE_MAX;
2194 /* rudimentary byte seek */
2195 /* XXX: use MXF Index */
2196 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2198 AVStream *st = s->streams[stream_index];
2200 MXFContext* mxf = s->priv_data;
2205 if (mxf->index_tables <= 0) {
2207 return AVERROR_INVALIDDATA;
2208 if (sample_time < 0)
2210 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2212 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2214 ff_update_cur_dts(s, st, sample_time);
2216 t = &mxf->index_tables[0];
2218 /* clamp above zero, else ff_index_search_timestamp() returns negative
2219 * this also means we allow seeking before the start */
2220 sample_time = FFMAX(sample_time, 0);
2222 if (t->fake_index) {
2223 /* behave as if we have a proper index */
2224 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2227 /* no IndexEntryArray (one or more CBR segments)
2228 * make sure we don't seek past the end */
2229 sample_time = FFMIN(sample_time, st->duration - 1);
2232 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2235 ff_update_cur_dts(s, st, sample_time);
2236 mxf->current_edit_unit = sample_time;
2237 avio_seek(s->pb, seekpos, SEEK_SET);
2242 AVInputFormat ff_mxf_demuxer = {
2244 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2245 .priv_data_size = sizeof(MXFContext),
2246 .read_probe = mxf_probe,
2247 .read_header = mxf_read_header,
2248 .read_packet = mxf_read_packet,
2249 .read_close = mxf_read_close,
2250 .read_seek = mxf_read_seek,