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;
977 uint64_t best_index_duration = 0;
979 for (j = 0; j < nb_segments; j++) {
980 MXFIndexTableSegment *s = unsorted_segments[j];
982 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
983 * 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 we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
986 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
987 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
988 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
990 best_body_sid = s->body_sid;
991 best_index_sid = s->index_sid;
992 best_index_start = s->index_start_position;
993 best_index_duration = s->index_duration;
997 /* no suitable entry found -> we're done */
1001 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1002 last_body_sid = best_body_sid;
1003 last_index_sid = best_index_sid;
1004 last_index_start = best_index_start;
1007 av_free(unsorted_segments);
1013 * Computes the absolute file offset of the given essence container offset
1015 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1018 int64_t offset_in = offset; /* for logging */
1020 for (x = 0; x < mxf->partitions_count; x++) {
1021 MXFPartition *p = &mxf->partitions[x];
1023 if (p->body_sid != body_sid)
1026 if (offset < p->essence_length || !p->essence_length) {
1027 *offset_out = p->essence_offset + offset;
1031 offset -= p->essence_length;
1034 av_log(mxf->fc, AV_LOG_ERROR,
1035 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1036 offset_in, body_sid);
1038 return AVERROR_INVALIDDATA;
1042 * Returns the end position of the essence container with given BodySID, or zero if unknown
1044 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1049 for (x = 0; x < mxf->partitions_count; x++) {
1050 MXFPartition *p = &mxf->partitions[x];
1052 if (p->body_sid != body_sid)
1055 if (!p->essence_length)
1058 ret = p->essence_offset + p->essence_length;
1064 /* EditUnit -> absolute offset */
1065 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)
1068 int64_t offset_temp = 0;
1070 for (i = 0; i < index_table->nb_segments; i++) {
1071 MXFIndexTableSegment *s = index_table->segments[i];
1073 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1075 if (edit_unit < s->index_start_position + s->index_duration) {
1076 int64_t index = edit_unit - s->index_start_position;
1078 if (s->edit_unit_byte_count)
1079 offset_temp += s->edit_unit_byte_count * index;
1080 else if (s->nb_index_entries) {
1081 if (s->nb_index_entries == 2 * s->index_duration + 1)
1082 index *= 2; /* Avid index */
1084 if (index < 0 || index >= s->nb_index_entries) {
1085 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1086 index_table->index_sid, s->index_start_position);
1087 return AVERROR_INVALIDDATA;
1090 offset_temp = s->stream_offset_entries[index];
1092 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1093 index_table->index_sid, s->index_start_position);
1094 return AVERROR_INVALIDDATA;
1098 *edit_unit_out = edit_unit;
1100 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1102 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1103 offset_temp += s->edit_unit_byte_count * s->index_duration;
1108 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);
1110 return AVERROR_INVALIDDATA;
1113 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1116 int8_t max_temporal_offset = -128;
1118 /* first compute how many entries we have */
1119 for (i = 0; i < index_table->nb_segments; i++) {
1120 MXFIndexTableSegment *s = index_table->segments[i];
1122 if (!s->nb_index_entries) {
1123 index_table->nb_ptses = 0;
1124 return 0; /* no TemporalOffsets */
1127 index_table->nb_ptses += s->index_duration;
1130 /* paranoid check */
1131 if (index_table->nb_ptses <= 0)
1134 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1135 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1136 av_freep(&index_table->ptses);
1137 return AVERROR(ENOMEM);
1140 /* we may have a few bad TemporalOffsets
1141 * make sure the corresponding PTSes don't have the bogus value 0 */
1142 for (x = 0; x < index_table->nb_ptses; x++)
1143 index_table->ptses[x] = AV_NOPTS_VALUE;
1157 * We want to transform it into this:
1168 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1169 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1170 * The latter makes DTS <= PTS.
1172 for (i = x = 0; i < index_table->nb_segments; i++) {
1173 MXFIndexTableSegment *s = index_table->segments[i];
1174 int index_delta = 1;
1175 int n = s->nb_index_entries;
1177 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1178 index_delta = 2; /* Avid index */
1179 /* ignore the last entry - it's the size of the essence container */
1183 for (j = 0; j < n; j += index_delta, x++) {
1184 int offset = s->temporal_offset_entries[j] / index_delta;
1185 int index = x + offset;
1187 if (x >= index_table->nb_ptses) {
1188 av_log(mxf->fc, AV_LOG_ERROR,
1189 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1190 s->nb_index_entries, s->index_duration);
1194 index_table->fake_index[x].timestamp = x;
1195 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1197 if (index < 0 || index >= index_table->nb_ptses) {
1198 av_log(mxf->fc, AV_LOG_ERROR,
1199 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1204 index_table->ptses[index] = x;
1205 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1209 index_table->first_dts = -max_temporal_offset;
1215 * Sorts and collects index table segments into index tables.
1216 * Also computes PTSes if possible.
1218 static int mxf_compute_index_tables(MXFContext *mxf)
1220 int i, j, k, ret, nb_sorted_segments;
1221 MXFIndexTableSegment **sorted_segments = NULL;
1223 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1224 nb_sorted_segments <= 0) {
1225 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1229 /* sanity check and count unique BodySIDs/IndexSIDs */
1230 for (i = 0; i < nb_sorted_segments; i++) {
1231 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1232 mxf->nb_index_tables++;
1233 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1234 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1235 ret = AVERROR_INVALIDDATA;
1236 goto finish_decoding_index;
1240 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1241 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1242 ret = AVERROR(ENOMEM);
1243 goto finish_decoding_index;
1246 /* distribute sorted segments to index tables */
1247 for (i = j = 0; i < nb_sorted_segments; i++) {
1248 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1253 mxf->index_tables[j].nb_segments++;
1256 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1257 MXFIndexTable *t = &mxf->index_tables[j];
1259 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1260 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1261 ret = AVERROR(ENOMEM);
1262 goto finish_decoding_index;
1265 if (sorted_segments[i]->index_start_position)
1266 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1267 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1269 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1270 t->index_sid = sorted_segments[i]->index_sid;
1271 t->body_sid = sorted_segments[i]->body_sid;
1273 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1274 goto finish_decoding_index;
1276 /* fix zero IndexDurations */
1277 for (k = 0; k < t->nb_segments; k++) {
1278 if (t->segments[k]->index_duration)
1281 if (t->nb_segments > 1)
1282 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1285 if (mxf->fc->nb_streams <= 0) {
1286 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1290 /* assume the first stream's duration is reasonable
1291 * leave index_duration = 0 on further segments in case we have any (unlikely)
1293 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1299 finish_decoding_index:
1300 av_free(sorted_segments);
1304 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1306 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1307 &descriptor->essence_container_ul)->id != CODEC_ID_NONE ||
1308 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1309 &descriptor->essence_codec_ul)->id != CODEC_ID_NONE;
1312 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1314 char buf[AV_TIMECODE_STR_SIZE];
1315 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1320 static int mxf_parse_structural_metadata(MXFContext *mxf)
1322 MXFPackage *material_package = NULL;
1323 MXFPackage *temp_package = NULL;
1326 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1327 /* TODO: handle multiple material packages (OP3x) */
1328 for (i = 0; i < mxf->packages_count; i++) {
1329 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1330 if (material_package) break;
1332 if (!material_package) {
1333 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1334 return AVERROR_INVALIDDATA;
1337 for (i = 0; i < material_package->tracks_count; i++) {
1338 MXFPackage *source_package = NULL;
1339 MXFTrack *material_track = NULL;
1340 MXFTrack *source_track = NULL;
1341 MXFTrack *temp_track = NULL;
1342 MXFDescriptor *descriptor = NULL;
1343 MXFStructuralComponent *component = NULL;
1344 MXFTimecodeComponent *mxf_tc = NULL;
1345 UID *essence_container_ul = NULL;
1346 const MXFCodecUL *codec_ul = NULL;
1347 const MXFCodecUL *container_ul = NULL;
1348 const MXFCodecUL *pix_fmt_ul = NULL;
1353 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1354 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1358 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1359 mxf_tc = (MXFTimecodeComponent*)component;
1360 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1361 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1362 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1366 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1367 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1371 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1372 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1376 mxf_tc = (MXFTimecodeComponent*)component;
1377 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1378 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1379 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1384 /* TODO: handle multiple source clips */
1385 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1386 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1390 for (k = 0; k < mxf->packages_count; k++) {
1391 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1394 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1395 source_package = temp_package;
1399 if (!source_package) {
1400 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1403 for (k = 0; k < source_package->tracks_count; k++) {
1404 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1405 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1406 ret = AVERROR_INVALIDDATA;
1409 if (temp_track->track_id == component->source_track_id) {
1410 source_track = temp_track;
1414 if (!source_track) {
1415 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1419 if (!source_track || !component)
1422 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1423 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1424 ret = AVERROR_INVALIDDATA;
1428 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1429 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1430 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1431 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1435 st = avformat_new_stream(mxf->fc, NULL);
1437 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1438 ret = AVERROR(ENOMEM);
1441 st->id = source_track->track_id;
1442 st->priv_data = source_track;
1443 st->duration = component->duration;
1444 if (st->duration == -1)
1445 st->duration = AV_NOPTS_VALUE;
1446 st->start_time = component->start_position;
1447 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1449 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1450 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1451 st->codec->codec_type = codec_ul->id;
1453 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1454 if (source_package->descriptor) {
1455 if (source_package->descriptor->type == MultipleDescriptor) {
1456 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1457 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1459 if (!sub_descriptor) {
1460 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1463 if (sub_descriptor->linked_track_id == source_track->track_id) {
1464 descriptor = sub_descriptor;
1468 } else if (source_package->descriptor->type == Descriptor)
1469 descriptor = source_package->descriptor;
1472 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1475 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1476 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1477 essence_container_ul = &descriptor->essence_container_ul;
1478 /* HACK: replacing the original key with mxf_encrypted_essence_container
1479 * is not allowed according to s429-6, try to find correct information anyway */
1480 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1481 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1482 for (k = 0; k < mxf->metadata_sets_count; k++) {
1483 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1484 if (metadata->type == CryptoContext) {
1485 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1491 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1492 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1493 st->codec->codec_id = codec_ul->id;
1494 if (descriptor->extradata) {
1495 st->codec->extradata = descriptor->extradata;
1496 st->codec->extradata_size = descriptor->extradata_size;
1498 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1499 source_track->intra_only = mxf_is_intra_only(descriptor);
1500 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1501 if (st->codec->codec_id == CODEC_ID_NONE)
1502 st->codec->codec_id = container_ul->id;
1503 st->codec->width = descriptor->width;
1504 st->codec->height = descriptor->height; /* Field height, not frame height */
1505 switch (descriptor->frame_layout) {
1506 case SegmentedFrame:
1507 /* This one is a weird layout I don't fully understand. */
1508 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1513 /* Every other line is stored and needs to be duplicated. */
1514 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1515 break; /* The correct thing to do here is fall through, but by breaking we might be
1516 able to decode some streams at half the vertical resolution, rather than not al all.
1517 It's also for compatibility with the old behavior. */
1520 case SeparateFields:
1521 st->codec->height *= 2; /* Turn field height into frame height. */
1524 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1526 if (st->codec->codec_id == CODEC_ID_RAWVIDEO) {
1527 st->codec->pix_fmt = descriptor->pix_fmt;
1528 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1529 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls, &descriptor->essence_codec_ul);
1530 st->codec->pix_fmt = pix_fmt_ul->id;
1531 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1532 /* support files created before RP224v10 by defaulting to UYVY422
1533 if subsampling is 4:2:2 and component depth is 8-bit */
1534 if (descriptor->horiz_subsampling == 2 &&
1535 descriptor->vert_subsampling == 1 &&
1536 descriptor->component_depth == 8) {
1537 st->codec->pix_fmt = PIX_FMT_UYVY422;
1542 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1543 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1544 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1545 if (st->codec->codec_id == CODEC_ID_NONE)
1546 st->codec->codec_id = container_ul->id;
1547 st->codec->channels = descriptor->channels;
1548 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1550 if (descriptor->sample_rate.den > 0)
1551 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1553 /* TODO: implement CODEC_ID_RAWAUDIO */
1554 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1555 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1556 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1557 else if (descriptor->bits_per_sample == 32)
1558 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1559 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1560 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1561 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1562 else if (descriptor->bits_per_sample == 32)
1563 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1564 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1565 st->need_parsing = AVSTREAM_PARSE_FULL;
1568 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1569 /* TODO: decode timestamps */
1570 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1579 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1580 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1591 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1593 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1594 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1596 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1597 { { 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 */
1598 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1599 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1600 { { 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 */
1601 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1602 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1603 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1604 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1605 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1606 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1607 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1608 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1611 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1613 AVIOContext *pb = mxf->fc->pb;
1614 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1615 uint64_t klv_end = avio_tell(pb) + klv->length;
1618 return AVERROR(ENOMEM);
1619 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1621 int tag = avio_rb16(pb);
1622 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1623 uint64_t next = avio_tell(pb) + size;
1626 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1627 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1628 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1631 if (tag > 0x7FFF) { /* dynamic tag */
1633 for (i = 0; i < mxf->local_tags_count; i++) {
1634 int local_tag = AV_RB16(mxf->local_tags+i*18);
1635 if (local_tag == tag) {
1636 memcpy(uid, mxf->local_tags+i*18+2, 16);
1637 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1638 PRINT_KEY(mxf->fc, "uid", uid);
1642 if (ctx_size && tag == 0x3C0A)
1643 avio_read(pb, ctx->uid, 16);
1644 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1647 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1648 * it extending past the end of the KLV though (zzuf5.mxf). */
1649 if (avio_tell(pb) > klv_end) {
1650 av_log(mxf->fc, AV_LOG_ERROR,
1651 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1653 return AVERROR_INVALIDDATA;
1654 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1655 avio_seek(pb, next, SEEK_SET);
1657 if (ctx_size) ctx->type = type;
1658 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1662 * Seeks to the previous partition, if possible
1663 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1665 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1667 AVIOContext *pb = mxf->fc->pb;
1669 if (!mxf->current_partition ||
1670 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1671 return 0; /* we've parsed all partitions */
1673 /* seek to previous partition */
1674 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1675 mxf->current_partition = NULL;
1677 av_dlog(mxf->fc, "seeking to previous partition\n");
1683 * Called when essence is encountered
1684 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1686 static int mxf_parse_handle_essence(MXFContext *mxf)
1688 AVIOContext *pb = mxf->fc->pb;
1691 if (mxf->parsing_backward) {
1692 return mxf_seek_to_previous_partition(mxf);
1694 if (!mxf->footer_partition) {
1695 av_dlog(mxf->fc, "no footer\n");
1699 av_dlog(mxf->fc, "seeking to footer\n");
1701 /* remember where we were so we don't end up seeking further back than this */
1702 mxf->last_forward_tell = avio_tell(pb);
1704 if (!pb->seekable) {
1705 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1709 /* seek to footer partition and parse backward */
1710 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1711 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1712 mxf->run_in + mxf->footer_partition, ret);
1716 mxf->current_partition = NULL;
1717 mxf->parsing_backward = 1;
1724 * Called when the next partition or EOF is encountered
1725 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1727 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1729 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1733 * Figures out the proper offset and length of the essence container in each partition
1735 static void mxf_compute_essence_containers(MXFContext *mxf)
1739 /* everything is already correct */
1740 if (mxf->op == OPAtom)
1743 for (x = 0; x < mxf->partitions_count; x++) {
1744 MXFPartition *p = &mxf->partitions[x];
1747 continue; /* BodySID == 0 -> no essence */
1749 if (x >= mxf->partitions_count - 1)
1750 break; /* last partition - can't compute length (and we don't need to) */
1752 /* essence container spans to the next partition */
1753 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1755 if (p->essence_length < 0) {
1756 /* next ThisPartition < essence_offset */
1757 p->essence_length = 0;
1758 av_log(mxf->fc, AV_LOG_ERROR,
1759 "partition %i: bad ThisPartition = %"PRIX64"\n",
1760 x+1, mxf->partitions[x+1].this_partition);
1765 static int64_t round_to_kag(int64_t position, int kag_size)
1767 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1768 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1769 int64_t ret = (position / kag_size) * kag_size;
1770 return ret == position ? ret : ret + kag_size;
1773 static int is_pcm(enum CodecID codec_id)
1775 /* we only care about "normal" PCM codecs until we get samples */
1776 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1780 * Deal with the case where for some audio atoms EditUnitByteCount is
1781 * very small (2, 4..). In those cases we should read more than one
1782 * sample per call to mxf_read_packet().
1784 static void mxf_handle_small_eubc(AVFormatContext *s)
1786 MXFContext *mxf = s->priv_data;
1788 /* assuming non-OPAtom == frame wrapped
1789 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1790 if (mxf->op != OPAtom)
1793 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1794 if (s->nb_streams != 1 ||
1795 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1796 !is_pcm(s->streams[0]->codec->codec_id) ||
1797 mxf->nb_index_tables != 1 ||
1798 mxf->index_tables[0].nb_segments != 1 ||
1799 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1802 /* arbitrarily default to 48 kHz PAL audio frame size */
1803 /* TODO: We could compute this from the ratio between the audio
1804 * and video edit rates for 48 kHz NTSC we could use the
1805 * 1802-1802-1802-1802-1801 pattern. */
1806 mxf->edit_units_per_packet = 1920;
1809 static int mxf_read_header(AVFormatContext *s)
1811 MXFContext *mxf = s->priv_data;
1813 int64_t essence_offset = 0;
1816 mxf->last_forward_tell = INT64_MAX;
1817 mxf->edit_units_per_packet = 1;
1819 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1820 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1821 return AVERROR_INVALIDDATA;
1823 avio_seek(s->pb, -14, SEEK_CUR);
1825 mxf->run_in = avio_tell(s->pb);
1827 while (!url_feof(s->pb)) {
1828 const MXFMetadataReadTableEntry *metadata;
1830 if (klv_read_packet(&klv, s->pb) < 0) {
1831 /* EOF - seek to previous partition or stop */
1832 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1838 PRINT_KEY(s, "read header", klv.key);
1839 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1840 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1841 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1842 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1843 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1845 if (!mxf->current_partition) {
1846 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1847 return AVERROR_INVALIDDATA;
1850 if (!mxf->current_partition->essence_offset) {
1851 /* for OP1a we compute essence_offset
1852 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1853 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1854 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1856 int64_t op1a_essence_offset =
1857 round_to_kag(mxf->current_partition->this_partition +
1858 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1859 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1860 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1862 if (mxf->op == OPAtom) {
1863 /* point essence_offset to the actual data
1864 * OPAtom has all the essence in one big KLV
1866 mxf->current_partition->essence_offset = avio_tell(s->pb);
1867 mxf->current_partition->essence_length = klv.length;
1869 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1870 mxf->current_partition->essence_offset = op1a_essence_offset;
1874 if (!essence_offset)
1875 essence_offset = klv.offset;
1877 /* seek to footer, previous partition or stop */
1878 if (mxf_parse_handle_essence(mxf) <= 0)
1881 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1882 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1883 /* next partition pack - keep going, seek to previous partition or stop */
1884 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1886 else if (mxf->parsing_backward)
1888 /* we're still parsing forward. proceed to parsing this partition pack */
1891 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1892 if (IS_KLV_KEY(klv.key, metadata->key)) {
1894 if (klv.key[5] == 0x53) {
1895 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1897 uint64_t next = avio_tell(s->pb) + klv.length;
1898 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1900 /* only seek forward, else this can loop for a long time */
1901 if (avio_tell(s->pb) > next) {
1902 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1904 return AVERROR_INVALIDDATA;
1907 avio_seek(s->pb, next, SEEK_SET);
1910 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1916 if (!metadata->read)
1917 avio_skip(s->pb, klv.length);
1919 /* FIXME avoid seek */
1920 if (!essence_offset) {
1921 av_log(s, AV_LOG_ERROR, "no essence\n");
1922 return AVERROR_INVALIDDATA;
1924 avio_seek(s->pb, essence_offset, SEEK_SET);
1926 mxf_compute_essence_containers(mxf);
1928 /* we need to do this before computing the index tables
1929 * to be able to fill in zero IndexDurations with st->duration */
1930 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1933 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1936 if (mxf->nb_index_tables > 1) {
1937 /* TODO: look up which IndexSID to use via EssenceContainerData */
1938 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1939 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1940 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1941 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1942 return AVERROR_INVALIDDATA;
1945 mxf_handle_small_eubc(s);
1951 * Sets mxf->current_edit_unit based on what offset we're currently at.
1952 * @return next_ofs if OK, <0 on error
1954 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1956 int64_t last_ofs = -1, next_ofs = -1;
1957 MXFIndexTable *t = &mxf->index_tables[0];
1959 /* this is called from the OP1a demuxing logic, which means there
1960 * may be no index tables */
1961 if (mxf->nb_index_tables <= 0)
1964 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
1965 while (mxf->current_edit_unit >= 0) {
1966 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1969 if (next_ofs <= last_ofs) {
1970 /* large next_ofs didn't change or current_edit_unit wrapped
1971 * around this fixes the infinite loop on zzuf3.mxf */
1972 av_log(mxf->fc, AV_LOG_ERROR,
1973 "next_ofs didn't change. not deriving packet timestamps\n");
1977 if (next_ofs > current_offset)
1980 last_ofs = next_ofs;
1981 mxf->current_edit_unit++;
1984 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
1985 if (mxf->current_edit_unit < 0)
1991 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1994 MXFContext *mxf = s->priv_data;
1996 while (!url_feof(s->pb)) {
1998 if (klv_read_packet(&klv, s->pb) < 0)
2000 PRINT_KEY(s, "read packet", klv.key);
2001 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2002 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2003 ret = mxf_decrypt_triplet(s, pkt, &klv);
2005 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2006 return AVERROR_INVALIDDATA;
2010 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2011 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2012 int index = mxf_get_stream_index(s, &klv);
2013 int64_t next_ofs, next_klv;
2018 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2022 st = s->streams[index];
2023 track = st->priv_data;
2025 if (s->streams[index]->discard == AVDISCARD_ALL)
2028 next_klv = avio_tell(s->pb) + klv.length;
2029 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2031 if (next_ofs >= 0 && next_klv > next_ofs) {
2032 /* if this check is hit then it's possible OPAtom was treated as OP1a
2033 * truncate the packet since it's probably very large (>2 GiB is common) */
2034 av_log_ask_for_sample(s,
2035 "KLV for edit unit %i extends into next edit unit - OPAtom misinterpreted as OP1a?\n",
2036 mxf->current_edit_unit);
2037 klv.length = next_ofs - avio_tell(s->pb);
2040 /* check for 8 channels AES3 element */
2041 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2042 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2043 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2044 return AVERROR_INVALIDDATA;
2047 ret = av_get_packet(s->pb, pkt, klv.length);
2051 pkt->stream_index = index;
2052 pkt->pos = klv.offset;
2054 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2055 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2056 MXFIndexTable *t = &mxf->index_tables[0];
2058 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2059 pkt->dts = mxf->current_edit_unit + t->first_dts;
2060 pkt->pts = t->ptses[mxf->current_edit_unit];
2061 } else if (track->intra_only) {
2062 /* intra-only -> PTS = EditUnit.
2063 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2064 pkt->pts = mxf->current_edit_unit;
2068 /* seek for truncated packets */
2069 avio_seek(s->pb, next_klv, SEEK_SET);
2074 avio_skip(s->pb, klv.length);
2079 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2081 MXFContext *mxf = s->priv_data;
2083 int64_t ret64, pos, next_pos;
2088 if (mxf->op != OPAtom)
2089 return mxf_read_packet_old(s, pkt);
2091 /* OPAtom - clip wrapped demuxing */
2092 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2094 t = &mxf->index_tables[0];
2096 if (mxf->current_edit_unit >= st->duration)
2099 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2101 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2104 /* compute size by finding the next edit unit or the end of the essence container
2105 * not pretty, but it works */
2106 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2107 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2108 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2109 return AVERROR_INVALIDDATA;
2112 if ((size = next_pos - pos) <= 0) {
2113 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2114 return AVERROR_INVALIDDATA;
2117 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2120 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2123 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2124 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2125 pkt->dts = mxf->current_edit_unit + t->first_dts;
2126 pkt->pts = t->ptses[mxf->current_edit_unit];
2129 pkt->stream_index = 0;
2130 mxf->current_edit_unit += edit_units;
2135 static int mxf_read_close(AVFormatContext *s)
2137 MXFContext *mxf = s->priv_data;
2138 MXFIndexTableSegment *seg;
2141 av_freep(&mxf->packages_refs);
2143 for (i = 0; i < s->nb_streams; i++)
2144 s->streams[i]->priv_data = NULL;
2146 for (i = 0; i < mxf->metadata_sets_count; i++) {
2147 switch (mxf->metadata_sets[i]->type) {
2148 case MultipleDescriptor:
2149 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2152 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2155 case MaterialPackage:
2156 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2158 case IndexTableSegment:
2159 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2160 av_freep(&seg->temporal_offset_entries);
2161 av_freep(&seg->flag_entries);
2162 av_freep(&seg->stream_offset_entries);
2167 av_freep(&mxf->metadata_sets[i]);
2169 av_freep(&mxf->partitions);
2170 av_freep(&mxf->metadata_sets);
2171 av_freep(&mxf->aesc);
2172 av_freep(&mxf->local_tags);
2174 for (i = 0; i < mxf->nb_index_tables; i++) {
2175 av_freep(&mxf->index_tables[i].segments);
2176 av_freep(&mxf->index_tables[i].ptses);
2177 av_freep(&mxf->index_tables[i].fake_index);
2179 av_freep(&mxf->index_tables);
2184 static int mxf_probe(AVProbeData *p) {
2185 uint8_t *bufp = p->buf;
2186 uint8_t *end = p->buf + p->buf_size;
2188 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2191 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2192 end -= sizeof(mxf_header_partition_pack_key);
2193 for (; bufp < end; bufp++) {
2194 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2195 return AVPROBE_SCORE_MAX;
2200 /* rudimentary byte seek */
2201 /* XXX: use MXF Index */
2202 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2204 AVStream *st = s->streams[stream_index];
2206 MXFContext* mxf = s->priv_data;
2211 if (mxf->index_tables <= 0) {
2213 return AVERROR_INVALIDDATA;
2214 if (sample_time < 0)
2216 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2218 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2220 ff_update_cur_dts(s, st, sample_time);
2222 t = &mxf->index_tables[0];
2224 /* clamp above zero, else ff_index_search_timestamp() returns negative
2225 * this also means we allow seeking before the start */
2226 sample_time = FFMAX(sample_time, 0);
2228 if (t->fake_index) {
2229 /* behave as if we have a proper index */
2230 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2233 /* no IndexEntryArray (one or more CBR segments)
2234 * make sure we don't seek past the end */
2235 sample_time = FFMIN(sample_time, st->duration - 1);
2238 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2241 ff_update_cur_dts(s, st, sample_time);
2242 mxf->current_edit_unit = sample_time;
2243 avio_seek(s->pb, seekpos, SEEK_SET);
2248 AVInputFormat ff_mxf_demuxer = {
2250 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2251 .priv_data_size = sizeof(MXFContext),
2252 .read_probe = mxf_probe,
2253 .read_header = mxf_read_header,
2254 .read_packet = mxf_read_packet,
2255 .read_close = mxf_read_close,
2256 .read_seek = mxf_read_seek,