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);
734 length = avio_rb32(pb);
736 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
737 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
738 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
739 return AVERROR(ENOMEM);
741 for (i = 0; i < segment->nb_index_entries; i++) {
742 segment->temporal_offset_entries[i] = avio_r8(pb);
743 avio_r8(pb); /* KeyFrameOffset */
744 segment->flag_entries[i] = avio_r8(pb);
745 segment->stream_offset_entries[i] = avio_rb64(pb);
746 avio_skip(pb, length - 11);
751 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
753 MXFIndexTableSegment *segment = arg;
756 segment->edit_unit_byte_count = avio_rb32(pb);
757 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
760 segment->index_sid = avio_rb32(pb);
761 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
764 segment->body_sid = avio_rb32(pb);
765 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
768 av_dlog(NULL, "IndexEntryArray found\n");
769 return mxf_read_index_entry_array(pb, segment);
771 segment->index_edit_rate.num = avio_rb32(pb);
772 segment->index_edit_rate.den = avio_rb32(pb);
773 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
774 segment->index_edit_rate.den);
777 segment->index_start_position = avio_rb64(pb);
778 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
781 segment->index_duration = avio_rb64(pb);
782 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
788 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
790 int code, value, ofs = 0;
791 char layout[16] = {0};
796 av_dlog(NULL, "pixel layout: code %#x\n", code);
799 layout[ofs++] = code;
800 layout[ofs++] = value;
802 } while (code != 0); /* SMPTE 377M E.2.46 */
804 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
807 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
809 MXFDescriptor *descriptor = arg;
810 descriptor->pix_fmt = PIX_FMT_NONE;
813 descriptor->sub_descriptors_count = avio_rb32(pb);
814 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
815 return AVERROR_INVALIDDATA;
816 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
817 if (!descriptor->sub_descriptors_refs)
818 return AVERROR(ENOMEM);
819 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
820 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
823 avio_read(pb, descriptor->essence_container_ul, 16);
826 descriptor->linked_track_id = avio_rb32(pb);
828 case 0x3201: /* PictureEssenceCoding */
829 avio_read(pb, descriptor->essence_codec_ul, 16);
832 descriptor->width = avio_rb32(pb);
835 descriptor->height = avio_rb32(pb);
838 descriptor->frame_layout = avio_r8(pb);
841 descriptor->aspect_ratio.num = avio_rb32(pb);
842 descriptor->aspect_ratio.den = avio_rb32(pb);
845 descriptor->component_depth = avio_rb32(pb);
848 descriptor->horiz_subsampling = avio_rb32(pb);
851 descriptor->vert_subsampling = avio_rb32(pb);
854 descriptor->sample_rate.num = avio_rb32(pb);
855 descriptor->sample_rate.den = avio_rb32(pb);
857 case 0x3D06: /* SoundEssenceCompression */
858 avio_read(pb, descriptor->essence_codec_ul, 16);
861 descriptor->channels = avio_rb32(pb);
864 descriptor->bits_per_sample = avio_rb32(pb);
867 mxf_read_pixel_layout(pb, descriptor);
870 /* Private uid used by SONY C0023S01.mxf */
871 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
872 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
873 if (!descriptor->extradata)
874 return AVERROR(ENOMEM);
875 descriptor->extradata_size = size;
876 avio_read(pb, descriptor->extradata, size);
884 * Match an uid independently of the version byte and up to len common bytes
887 static int mxf_match_uid(const UID key, const UID uid, int len)
890 for (i = 0; i < len; i++) {
891 if (i != 7 && key[i] != uid[i])
897 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
899 while (uls->uid[0]) {
900 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
907 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
913 for (i = 0; i < mxf->metadata_sets_count; i++) {
914 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
915 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
916 return mxf->metadata_sets[i];
922 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
923 // video essence container uls
924 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
925 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
926 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
927 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
930 /* EC ULs for intra-only formats */
931 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
932 { { 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 */
933 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
936 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
937 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
938 { { 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 */
939 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
942 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
943 // sound essence container uls
944 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
945 { { 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 */
946 { { 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 */
947 { { 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 */
948 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
951 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
953 int i, j, nb_segments = 0;
954 MXFIndexTableSegment **unsorted_segments;
955 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
957 /* count number of segments, allocate arrays and copy unsorted segments */
958 for (i = 0; i < mxf->metadata_sets_count; i++)
959 if (mxf->metadata_sets[i]->type == IndexTableSegment)
962 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
963 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
964 av_freep(sorted_segments);
965 av_free(unsorted_segments);
966 return AVERROR(ENOMEM);
969 for (i = j = 0; i < mxf->metadata_sets_count; i++)
970 if (mxf->metadata_sets[i]->type == IndexTableSegment)
971 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
973 *nb_sorted_segments = 0;
975 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
976 for (i = 0; i < nb_segments; i++) {
977 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
978 uint64_t best_index_duration = 0;
980 for (j = 0; j < nb_segments; j++) {
981 MXFIndexTableSegment *s = unsorted_segments[j];
983 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
984 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
985 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
987 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
988 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
989 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
991 best_body_sid = s->body_sid;
992 best_index_sid = s->index_sid;
993 best_index_start = s->index_start_position;
994 best_index_duration = s->index_duration;
998 /* no suitable entry found -> we're done */
1002 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1003 last_body_sid = best_body_sid;
1004 last_index_sid = best_index_sid;
1005 last_index_start = best_index_start;
1008 av_free(unsorted_segments);
1014 * Computes the absolute file offset of the given essence container offset
1016 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1019 int64_t offset_in = offset; /* for logging */
1021 for (x = 0; x < mxf->partitions_count; x++) {
1022 MXFPartition *p = &mxf->partitions[x];
1024 if (p->body_sid != body_sid)
1027 if (offset < p->essence_length || !p->essence_length) {
1028 *offset_out = p->essence_offset + offset;
1032 offset -= p->essence_length;
1035 av_log(mxf->fc, AV_LOG_ERROR,
1036 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1037 offset_in, body_sid);
1039 return AVERROR_INVALIDDATA;
1043 * Returns the end position of the essence container with given BodySID, or zero if unknown
1045 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1050 for (x = 0; x < mxf->partitions_count; x++) {
1051 MXFPartition *p = &mxf->partitions[x];
1053 if (p->body_sid != body_sid)
1056 if (!p->essence_length)
1059 ret = p->essence_offset + p->essence_length;
1065 /* EditUnit -> absolute offset */
1066 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)
1069 int64_t offset_temp = 0;
1071 for (i = 0; i < index_table->nb_segments; i++) {
1072 MXFIndexTableSegment *s = index_table->segments[i];
1074 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1076 if (edit_unit < s->index_start_position + s->index_duration) {
1077 int64_t index = edit_unit - s->index_start_position;
1079 if (s->edit_unit_byte_count)
1080 offset_temp += s->edit_unit_byte_count * index;
1081 else if (s->nb_index_entries) {
1082 if (s->nb_index_entries == 2 * s->index_duration + 1)
1083 index *= 2; /* Avid index */
1085 if (index < 0 || index >= s->nb_index_entries) {
1086 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1087 index_table->index_sid, s->index_start_position);
1088 return AVERROR_INVALIDDATA;
1091 offset_temp = s->stream_offset_entries[index];
1093 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1094 index_table->index_sid, s->index_start_position);
1095 return AVERROR_INVALIDDATA;
1099 *edit_unit_out = edit_unit;
1101 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1103 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1104 offset_temp += s->edit_unit_byte_count * s->index_duration;
1109 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);
1111 return AVERROR_INVALIDDATA;
1114 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1117 int8_t max_temporal_offset = -128;
1119 /* first compute how many entries we have */
1120 for (i = 0; i < index_table->nb_segments; i++) {
1121 MXFIndexTableSegment *s = index_table->segments[i];
1123 if (!s->nb_index_entries) {
1124 index_table->nb_ptses = 0;
1125 return 0; /* no TemporalOffsets */
1128 index_table->nb_ptses += s->index_duration;
1131 /* paranoid check */
1132 if (index_table->nb_ptses <= 0)
1135 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1136 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1137 av_freep(&index_table->ptses);
1138 return AVERROR(ENOMEM);
1141 /* we may have a few bad TemporalOffsets
1142 * make sure the corresponding PTSes don't have the bogus value 0 */
1143 for (x = 0; x < index_table->nb_ptses; x++)
1144 index_table->ptses[x] = AV_NOPTS_VALUE;
1158 * We want to transform it into this:
1169 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1170 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1171 * The latter makes DTS <= PTS.
1173 for (i = x = 0; i < index_table->nb_segments; i++) {
1174 MXFIndexTableSegment *s = index_table->segments[i];
1175 int index_delta = 1;
1176 int n = s->nb_index_entries;
1178 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1179 index_delta = 2; /* Avid index */
1180 /* ignore the last entry - it's the size of the essence container */
1184 for (j = 0; j < n; j += index_delta, x++) {
1185 int offset = s->temporal_offset_entries[j] / index_delta;
1186 int index = x + offset;
1188 if (x >= index_table->nb_ptses) {
1189 av_log(mxf->fc, AV_LOG_ERROR,
1190 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1191 s->nb_index_entries, s->index_duration);
1195 index_table->fake_index[x].timestamp = x;
1196 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1198 if (index < 0 || index >= index_table->nb_ptses) {
1199 av_log(mxf->fc, AV_LOG_ERROR,
1200 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1205 index_table->ptses[index] = x;
1206 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1210 index_table->first_dts = -max_temporal_offset;
1216 * Sorts and collects index table segments into index tables.
1217 * Also computes PTSes if possible.
1219 static int mxf_compute_index_tables(MXFContext *mxf)
1221 int i, j, k, ret, nb_sorted_segments;
1222 MXFIndexTableSegment **sorted_segments = NULL;
1224 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1225 nb_sorted_segments <= 0) {
1226 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1230 /* sanity check and count unique BodySIDs/IndexSIDs */
1231 for (i = 0; i < nb_sorted_segments; i++) {
1232 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1233 mxf->nb_index_tables++;
1234 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1235 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1236 ret = AVERROR_INVALIDDATA;
1237 goto finish_decoding_index;
1241 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1242 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1243 ret = AVERROR(ENOMEM);
1244 goto finish_decoding_index;
1247 /* distribute sorted segments to index tables */
1248 for (i = j = 0; i < nb_sorted_segments; i++) {
1249 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1254 mxf->index_tables[j].nb_segments++;
1257 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1258 MXFIndexTable *t = &mxf->index_tables[j];
1260 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1261 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1262 ret = AVERROR(ENOMEM);
1263 goto finish_decoding_index;
1266 if (sorted_segments[i]->index_start_position)
1267 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1268 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1270 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1271 t->index_sid = sorted_segments[i]->index_sid;
1272 t->body_sid = sorted_segments[i]->body_sid;
1274 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1275 goto finish_decoding_index;
1277 /* fix zero IndexDurations */
1278 for (k = 0; k < t->nb_segments; k++) {
1279 if (t->segments[k]->index_duration)
1282 if (t->nb_segments > 1)
1283 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1286 if (mxf->fc->nb_streams <= 0) {
1287 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1291 /* assume the first stream's duration is reasonable
1292 * leave index_duration = 0 on further segments in case we have any (unlikely)
1294 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1300 finish_decoding_index:
1301 av_free(sorted_segments);
1305 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1307 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1308 &descriptor->essence_container_ul)->id != CODEC_ID_NONE ||
1309 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1310 &descriptor->essence_codec_ul)->id != CODEC_ID_NONE;
1313 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1315 char buf[AV_TIMECODE_STR_SIZE];
1316 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1321 static int mxf_parse_structural_metadata(MXFContext *mxf)
1323 MXFPackage *material_package = NULL;
1324 MXFPackage *temp_package = NULL;
1327 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1328 /* TODO: handle multiple material packages (OP3x) */
1329 for (i = 0; i < mxf->packages_count; i++) {
1330 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1331 if (material_package) break;
1333 if (!material_package) {
1334 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1335 return AVERROR_INVALIDDATA;
1338 for (i = 0; i < material_package->tracks_count; i++) {
1339 MXFPackage *source_package = NULL;
1340 MXFTrack *material_track = NULL;
1341 MXFTrack *source_track = NULL;
1342 MXFTrack *temp_track = NULL;
1343 MXFDescriptor *descriptor = NULL;
1344 MXFStructuralComponent *component = NULL;
1345 MXFTimecodeComponent *mxf_tc = NULL;
1346 UID *essence_container_ul = NULL;
1347 const MXFCodecUL *codec_ul = NULL;
1348 const MXFCodecUL *container_ul = NULL;
1349 const MXFCodecUL *pix_fmt_ul = NULL;
1354 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1355 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1359 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1360 mxf_tc = (MXFTimecodeComponent*)component;
1361 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1362 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1363 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1367 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1368 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1372 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1373 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1377 mxf_tc = (MXFTimecodeComponent*)component;
1378 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1379 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1380 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1385 /* TODO: handle multiple source clips */
1386 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1387 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1391 for (k = 0; k < mxf->packages_count; k++) {
1392 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1395 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1396 source_package = temp_package;
1400 if (!source_package) {
1401 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1404 for (k = 0; k < source_package->tracks_count; k++) {
1405 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1406 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1407 ret = AVERROR_INVALIDDATA;
1410 if (temp_track->track_id == component->source_track_id) {
1411 source_track = temp_track;
1415 if (!source_track) {
1416 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1420 if (!source_track || !component)
1423 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1424 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1425 ret = AVERROR_INVALIDDATA;
1429 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1430 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1431 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1432 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1436 st = avformat_new_stream(mxf->fc, NULL);
1438 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1439 ret = AVERROR(ENOMEM);
1442 st->id = source_track->track_id;
1443 st->priv_data = source_track;
1444 st->duration = component->duration;
1445 if (st->duration == -1)
1446 st->duration = AV_NOPTS_VALUE;
1447 st->start_time = component->start_position;
1448 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1450 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1451 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1452 st->codec->codec_type = codec_ul->id;
1454 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1455 if (source_package->descriptor) {
1456 if (source_package->descriptor->type == MultipleDescriptor) {
1457 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1458 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1460 if (!sub_descriptor) {
1461 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1464 if (sub_descriptor->linked_track_id == source_track->track_id) {
1465 descriptor = sub_descriptor;
1469 } else if (source_package->descriptor->type == Descriptor)
1470 descriptor = source_package->descriptor;
1473 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1476 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1477 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1478 essence_container_ul = &descriptor->essence_container_ul;
1479 /* HACK: replacing the original key with mxf_encrypted_essence_container
1480 * is not allowed according to s429-6, try to find correct information anyway */
1481 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1482 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1483 for (k = 0; k < mxf->metadata_sets_count; k++) {
1484 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1485 if (metadata->type == CryptoContext) {
1486 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1492 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1493 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1494 st->codec->codec_id = codec_ul->id;
1495 if (descriptor->extradata) {
1496 st->codec->extradata = descriptor->extradata;
1497 st->codec->extradata_size = descriptor->extradata_size;
1499 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1500 source_track->intra_only = mxf_is_intra_only(descriptor);
1501 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1502 if (st->codec->codec_id == CODEC_ID_NONE)
1503 st->codec->codec_id = container_ul->id;
1504 st->codec->width = descriptor->width;
1505 st->codec->height = descriptor->height; /* Field height, not frame height */
1506 switch (descriptor->frame_layout) {
1507 case SegmentedFrame:
1508 /* This one is a weird layout I don't fully understand. */
1509 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1514 /* Every other line is stored and needs to be duplicated. */
1515 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1516 break; /* The correct thing to do here is fall through, but by breaking we might be
1517 able to decode some streams at half the vertical resolution, rather than not al all.
1518 It's also for compatibility with the old behavior. */
1521 case SeparateFields:
1522 st->codec->height *= 2; /* Turn field height into frame height. */
1525 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1527 if (st->codec->codec_id == CODEC_ID_RAWVIDEO) {
1528 st->codec->pix_fmt = descriptor->pix_fmt;
1529 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1530 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1531 &descriptor->essence_codec_ul);
1532 st->codec->pix_fmt = pix_fmt_ul->id;
1533 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1534 /* support files created before RP224v10 by defaulting to UYVY422
1535 if subsampling is 4:2:2 and component depth is 8-bit */
1536 if (descriptor->horiz_subsampling == 2 &&
1537 descriptor->vert_subsampling == 1 &&
1538 descriptor->component_depth == 8) {
1539 st->codec->pix_fmt = PIX_FMT_UYVY422;
1544 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1545 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1546 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1547 if (st->codec->codec_id == CODEC_ID_NONE)
1548 st->codec->codec_id = container_ul->id;
1549 st->codec->channels = descriptor->channels;
1550 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1552 if (descriptor->sample_rate.den > 0)
1553 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1555 /* TODO: implement CODEC_ID_RAWAUDIO */
1556 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1557 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1558 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1559 else if (descriptor->bits_per_sample == 32)
1560 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1561 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1562 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1563 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1564 else if (descriptor->bits_per_sample == 32)
1565 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1566 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1567 st->need_parsing = AVSTREAM_PARSE_FULL;
1570 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1571 /* TODO: decode timestamps */
1572 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1581 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1591 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1593 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1594 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1596 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1597 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1598 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1599 { { 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 */
1600 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1601 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1602 { { 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 */
1603 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1604 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1605 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1606 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1607 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1608 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1609 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1610 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1613 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1615 AVIOContext *pb = mxf->fc->pb;
1616 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1617 uint64_t klv_end = avio_tell(pb) + klv->length;
1620 return AVERROR(ENOMEM);
1621 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1623 int tag = avio_rb16(pb);
1624 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1625 uint64_t next = avio_tell(pb) + size;
1628 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1629 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1630 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1633 if (tag > 0x7FFF) { /* dynamic tag */
1635 for (i = 0; i < mxf->local_tags_count; i++) {
1636 int local_tag = AV_RB16(mxf->local_tags+i*18);
1637 if (local_tag == tag) {
1638 memcpy(uid, mxf->local_tags+i*18+2, 16);
1639 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1640 PRINT_KEY(mxf->fc, "uid", uid);
1644 if (ctx_size && tag == 0x3C0A)
1645 avio_read(pb, ctx->uid, 16);
1646 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1649 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1650 * it extending past the end of the KLV though (zzuf5.mxf). */
1651 if (avio_tell(pb) > klv_end) {
1652 av_log(mxf->fc, AV_LOG_ERROR,
1653 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1655 return AVERROR_INVALIDDATA;
1656 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1657 avio_seek(pb, next, SEEK_SET);
1659 if (ctx_size) ctx->type = type;
1660 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1664 * Seeks to the previous partition, if possible
1665 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1667 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1669 AVIOContext *pb = mxf->fc->pb;
1671 if (!mxf->current_partition ||
1672 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1673 return 0; /* we've parsed all partitions */
1675 /* seek to previous partition */
1676 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1677 mxf->current_partition = NULL;
1679 av_dlog(mxf->fc, "seeking to previous partition\n");
1685 * Called when essence is encountered
1686 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1688 static int mxf_parse_handle_essence(MXFContext *mxf)
1690 AVIOContext *pb = mxf->fc->pb;
1693 if (mxf->parsing_backward) {
1694 return mxf_seek_to_previous_partition(mxf);
1696 if (!mxf->footer_partition) {
1697 av_dlog(mxf->fc, "no footer\n");
1701 av_dlog(mxf->fc, "seeking to footer\n");
1703 /* remember where we were so we don't end up seeking further back than this */
1704 mxf->last_forward_tell = avio_tell(pb);
1706 if (!pb->seekable) {
1707 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1711 /* seek to footer partition and parse backward */
1712 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1713 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1714 mxf->run_in + mxf->footer_partition, ret);
1718 mxf->current_partition = NULL;
1719 mxf->parsing_backward = 1;
1726 * Called when the next partition or EOF is encountered
1727 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1729 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1731 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1735 * Figures out the proper offset and length of the essence container in each partition
1737 static void mxf_compute_essence_containers(MXFContext *mxf)
1741 /* everything is already correct */
1742 if (mxf->op == OPAtom)
1745 for (x = 0; x < mxf->partitions_count; x++) {
1746 MXFPartition *p = &mxf->partitions[x];
1749 continue; /* BodySID == 0 -> no essence */
1751 if (x >= mxf->partitions_count - 1)
1752 break; /* last partition - can't compute length (and we don't need to) */
1754 /* essence container spans to the next partition */
1755 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1757 if (p->essence_length < 0) {
1758 /* next ThisPartition < essence_offset */
1759 p->essence_length = 0;
1760 av_log(mxf->fc, AV_LOG_ERROR,
1761 "partition %i: bad ThisPartition = %"PRIX64"\n",
1762 x+1, mxf->partitions[x+1].this_partition);
1767 static int64_t round_to_kag(int64_t position, int kag_size)
1769 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1770 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1771 int64_t ret = (position / kag_size) * kag_size;
1772 return ret == position ? ret : ret + kag_size;
1775 static int is_pcm(enum CodecID codec_id)
1777 /* we only care about "normal" PCM codecs until we get samples */
1778 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1782 * Deal with the case where for some audio atoms EditUnitByteCount is
1783 * very small (2, 4..). In those cases we should read more than one
1784 * sample per call to mxf_read_packet().
1786 static void mxf_handle_small_eubc(AVFormatContext *s)
1788 MXFContext *mxf = s->priv_data;
1790 /* assuming non-OPAtom == frame wrapped
1791 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1792 if (mxf->op != OPAtom)
1795 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1796 if (s->nb_streams != 1 ||
1797 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1798 !is_pcm(s->streams[0]->codec->codec_id) ||
1799 mxf->nb_index_tables != 1 ||
1800 mxf->index_tables[0].nb_segments != 1 ||
1801 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1804 /* arbitrarily default to 48 kHz PAL audio frame size */
1805 /* TODO: We could compute this from the ratio between the audio
1806 * and video edit rates for 48 kHz NTSC we could use the
1807 * 1802-1802-1802-1802-1801 pattern. */
1808 mxf->edit_units_per_packet = 1920;
1811 static int mxf_read_header(AVFormatContext *s)
1813 MXFContext *mxf = s->priv_data;
1815 int64_t essence_offset = 0;
1818 mxf->last_forward_tell = INT64_MAX;
1819 mxf->edit_units_per_packet = 1;
1821 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1822 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1823 return AVERROR_INVALIDDATA;
1825 avio_seek(s->pb, -14, SEEK_CUR);
1827 mxf->run_in = avio_tell(s->pb);
1829 while (!url_feof(s->pb)) {
1830 const MXFMetadataReadTableEntry *metadata;
1832 if (klv_read_packet(&klv, s->pb) < 0) {
1833 /* EOF - seek to previous partition or stop */
1834 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1840 PRINT_KEY(s, "read header", klv.key);
1841 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1842 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1843 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1844 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1845 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1847 if (!mxf->current_partition) {
1848 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1849 return AVERROR_INVALIDDATA;
1852 if (!mxf->current_partition->essence_offset) {
1853 /* for OP1a we compute essence_offset
1854 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1855 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1856 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1858 int64_t op1a_essence_offset =
1859 round_to_kag(mxf->current_partition->this_partition +
1860 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1861 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1862 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1864 if (mxf->op == OPAtom) {
1865 /* point essence_offset to the actual data
1866 * OPAtom has all the essence in one big KLV
1868 mxf->current_partition->essence_offset = avio_tell(s->pb);
1869 mxf->current_partition->essence_length = klv.length;
1871 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1872 mxf->current_partition->essence_offset = op1a_essence_offset;
1876 if (!essence_offset)
1877 essence_offset = klv.offset;
1879 /* seek to footer, previous partition or stop */
1880 if (mxf_parse_handle_essence(mxf) <= 0)
1883 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1884 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1885 /* next partition pack - keep going, seek to previous partition or stop */
1886 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1888 else if (mxf->parsing_backward)
1890 /* we're still parsing forward. proceed to parsing this partition pack */
1893 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1894 if (IS_KLV_KEY(klv.key, metadata->key)) {
1896 if (klv.key[5] == 0x53) {
1897 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1899 uint64_t next = avio_tell(s->pb) + klv.length;
1900 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1902 /* only seek forward, else this can loop for a long time */
1903 if (avio_tell(s->pb) > next) {
1904 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1906 return AVERROR_INVALIDDATA;
1909 avio_seek(s->pb, next, SEEK_SET);
1912 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1918 if (!metadata->read)
1919 avio_skip(s->pb, klv.length);
1921 /* FIXME avoid seek */
1922 if (!essence_offset) {
1923 av_log(s, AV_LOG_ERROR, "no essence\n");
1924 return AVERROR_INVALIDDATA;
1926 avio_seek(s->pb, essence_offset, SEEK_SET);
1928 mxf_compute_essence_containers(mxf);
1930 /* we need to do this before computing the index tables
1931 * to be able to fill in zero IndexDurations with st->duration */
1932 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1935 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1938 if (mxf->nb_index_tables > 1) {
1939 /* TODO: look up which IndexSID to use via EssenceContainerData */
1940 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1941 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1942 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1943 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1944 return AVERROR_INVALIDDATA;
1947 mxf_handle_small_eubc(s);
1953 * Sets mxf->current_edit_unit based on what offset we're currently at.
1954 * @return next_ofs if OK, <0 on error
1956 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1958 int64_t last_ofs = -1, next_ofs = -1;
1959 MXFIndexTable *t = &mxf->index_tables[0];
1961 /* this is called from the OP1a demuxing logic, which means there
1962 * may be no index tables */
1963 if (mxf->nb_index_tables <= 0)
1966 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
1967 while (mxf->current_edit_unit >= 0) {
1968 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1971 if (next_ofs <= last_ofs) {
1972 /* large next_ofs didn't change or current_edit_unit wrapped
1973 * around this fixes the infinite loop on zzuf3.mxf */
1974 av_log(mxf->fc, AV_LOG_ERROR,
1975 "next_ofs didn't change. not deriving packet timestamps\n");
1979 if (next_ofs > current_offset)
1982 last_ofs = next_ofs;
1983 mxf->current_edit_unit++;
1986 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
1987 if (mxf->current_edit_unit < 0)
1993 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1996 MXFContext *mxf = s->priv_data;
1998 while (!url_feof(s->pb)) {
2000 if (klv_read_packet(&klv, s->pb) < 0)
2002 PRINT_KEY(s, "read packet", klv.key);
2003 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2004 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2005 ret = mxf_decrypt_triplet(s, pkt, &klv);
2007 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2008 return AVERROR_INVALIDDATA;
2012 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2013 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2014 int index = mxf_get_stream_index(s, &klv);
2015 int64_t next_ofs, next_klv;
2020 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2024 st = s->streams[index];
2025 track = st->priv_data;
2027 if (s->streams[index]->discard == AVDISCARD_ALL)
2030 next_klv = avio_tell(s->pb) + klv.length;
2031 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2033 if (next_ofs >= 0 && next_klv > next_ofs) {
2034 /* if this check is hit then it's possible OPAtom was treated as OP1a
2035 * truncate the packet since it's probably very large (>2 GiB is common) */
2036 av_log_ask_for_sample(s,
2037 "KLV for edit unit %i extends into next edit unit - OPAtom misinterpreted as OP1a?\n",
2038 mxf->current_edit_unit);
2039 klv.length = next_ofs - avio_tell(s->pb);
2042 /* check for 8 channels AES3 element */
2043 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2044 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2045 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2046 return AVERROR_INVALIDDATA;
2049 ret = av_get_packet(s->pb, pkt, klv.length);
2053 pkt->stream_index = index;
2054 pkt->pos = klv.offset;
2056 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2057 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2058 MXFIndexTable *t = &mxf->index_tables[0];
2060 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2061 pkt->dts = mxf->current_edit_unit + t->first_dts;
2062 pkt->pts = t->ptses[mxf->current_edit_unit];
2063 } else if (track->intra_only) {
2064 /* intra-only -> PTS = EditUnit.
2065 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2066 pkt->pts = mxf->current_edit_unit;
2070 /* seek for truncated packets */
2071 avio_seek(s->pb, next_klv, SEEK_SET);
2076 avio_skip(s->pb, klv.length);
2081 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2083 MXFContext *mxf = s->priv_data;
2085 int64_t ret64, pos, next_pos;
2090 if (mxf->op != OPAtom)
2091 return mxf_read_packet_old(s, pkt);
2093 /* OPAtom - clip wrapped demuxing */
2094 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2096 t = &mxf->index_tables[0];
2098 if (mxf->current_edit_unit >= st->duration)
2101 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2103 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2106 /* compute size by finding the next edit unit or the end of the essence container
2107 * not pretty, but it works */
2108 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2109 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2110 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2111 return AVERROR_INVALIDDATA;
2114 if ((size = next_pos - pos) <= 0) {
2115 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2116 return AVERROR_INVALIDDATA;
2119 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2122 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2125 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2126 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2127 pkt->dts = mxf->current_edit_unit + t->first_dts;
2128 pkt->pts = t->ptses[mxf->current_edit_unit];
2131 pkt->stream_index = 0;
2132 mxf->current_edit_unit += edit_units;
2137 static int mxf_read_close(AVFormatContext *s)
2139 MXFContext *mxf = s->priv_data;
2140 MXFIndexTableSegment *seg;
2143 av_freep(&mxf->packages_refs);
2145 for (i = 0; i < s->nb_streams; i++)
2146 s->streams[i]->priv_data = NULL;
2148 for (i = 0; i < mxf->metadata_sets_count; i++) {
2149 switch (mxf->metadata_sets[i]->type) {
2150 case MultipleDescriptor:
2151 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2154 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2157 case MaterialPackage:
2158 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2160 case IndexTableSegment:
2161 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2162 av_freep(&seg->temporal_offset_entries);
2163 av_freep(&seg->flag_entries);
2164 av_freep(&seg->stream_offset_entries);
2169 av_freep(&mxf->metadata_sets[i]);
2171 av_freep(&mxf->partitions);
2172 av_freep(&mxf->metadata_sets);
2173 av_freep(&mxf->aesc);
2174 av_freep(&mxf->local_tags);
2176 for (i = 0; i < mxf->nb_index_tables; i++) {
2177 av_freep(&mxf->index_tables[i].segments);
2178 av_freep(&mxf->index_tables[i].ptses);
2179 av_freep(&mxf->index_tables[i].fake_index);
2181 av_freep(&mxf->index_tables);
2186 static int mxf_probe(AVProbeData *p) {
2187 uint8_t *bufp = p->buf;
2188 uint8_t *end = p->buf + p->buf_size;
2190 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2193 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2194 end -= sizeof(mxf_header_partition_pack_key);
2195 for (; bufp < end; bufp++) {
2196 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2197 return AVPROBE_SCORE_MAX;
2202 /* rudimentary byte seek */
2203 /* XXX: use MXF Index */
2204 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2206 AVStream *st = s->streams[stream_index];
2208 MXFContext* mxf = s->priv_data;
2213 if (mxf->index_tables <= 0) {
2215 return AVERROR_INVALIDDATA;
2216 if (sample_time < 0)
2218 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2220 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2222 ff_update_cur_dts(s, st, sample_time);
2224 t = &mxf->index_tables[0];
2226 /* clamp above zero, else ff_index_search_timestamp() returns negative
2227 * this also means we allow seeking before the start */
2228 sample_time = FFMAX(sample_time, 0);
2230 if (t->fake_index) {
2231 /* behave as if we have a proper index */
2232 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2235 /* no IndexEntryArray (one or more CBR segments)
2236 * make sure we don't seek past the end */
2237 sample_time = FFMIN(sample_time, st->duration - 1);
2240 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2243 ff_update_cur_dts(s, st, sample_time);
2244 mxf->current_edit_unit = sample_time;
2245 avio_seek(s->pb, seekpos, SEEK_SET);
2250 AVInputFormat ff_mxf_demuxer = {
2252 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2253 .priv_data_size = sizeof(MXFContext),
2254 .read_probe = mxf_probe,
2255 .read_header = mxf_read_header,
2256 .read_packet = mxf_read_packet,
2257 .read_close = mxf_read_close,
2258 .read_seek = mxf_read_seek,