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/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/timecode.h"
75 OPSONYOpt, /* FATE sample, violates the spec in places */
81 MXFPartitionType type;
82 uint64_t previous_partition;
85 int64_t this_partition;
86 int64_t essence_offset; ///< absolute offset of essence
87 int64_t essence_length;
89 int64_t header_byte_count;
90 int64_t index_byte_count;
92 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
97 enum MXFMetadataSetType type;
98 UID source_container_ul;
103 enum MXFMetadataSetType type;
104 UID source_package_uid;
105 UID data_definition_ul;
107 int64_t start_position;
109 } MXFStructuralComponent;
113 enum MXFMetadataSetType type;
114 UID data_definition_ul;
115 UID *structural_components_refs;
116 int structural_components_count;
123 enum MXFMetadataSetType type;
126 struct AVRational rate;
128 } MXFTimecodeComponent;
132 enum MXFMetadataSetType type;
133 UID input_segment_ref;
134 } MXFPulldownComponent;
138 enum MXFMetadataSetType type;
139 MXFSequence *sequence; /* mandatory, and only one */
142 uint8_t track_number[4];
143 AVRational edit_rate;
145 uint64_t sample_count;
146 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
151 enum MXFMetadataSetType type;
152 UID essence_container_ul;
153 UID essence_codec_ul;
154 AVRational sample_rate;
155 AVRational aspect_ratio;
157 int height; /* Field height, not frame height */
158 int frame_layout; /* See MXFFrameLayout enum */
164 unsigned int component_depth;
165 unsigned int horiz_subsampling;
166 unsigned int vert_subsampling;
167 UID *sub_descriptors_refs;
168 int sub_descriptors_count;
172 enum AVPixelFormat pix_fmt;
177 enum MXFMetadataSetType type;
178 int edit_unit_byte_count;
181 AVRational index_edit_rate;
182 uint64_t index_start_position;
183 uint64_t index_duration;
184 int8_t *temporal_offset_entries;
186 uint64_t *stream_offset_entries;
187 int nb_index_entries;
188 } MXFIndexTableSegment;
192 enum MXFMetadataSetType type;
196 MXFDescriptor *descriptor; /* only one */
203 enum MXFMetadataSetType type;
206 /* decoded index table */
210 int nb_ptses; /* number of PTSes or total duration of index */
211 int64_t first_dts; /* DTS = EditUnit + first_dts */
212 int64_t *ptses; /* maps EditUnit -> PTS */
214 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
215 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
219 MXFPartition *partitions;
220 unsigned partitions_count;
224 MXFMetadataSet **metadata_sets;
225 int metadata_sets_count;
229 int local_tags_count;
230 uint64_t footer_partition;
231 KLVPacket current_klv_data;
232 int current_klv_index;
234 MXFPartition *current_partition;
235 int parsing_backward;
236 int64_t last_forward_tell;
237 int last_forward_partition;
238 int current_edit_unit;
240 MXFIndexTable *index_tables;
241 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
244 enum MXFWrappingScheme {
249 /* NOTE: klv_offset is not set (-1) for local keys */
250 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
254 MXFMetadataReadFunc *read;
256 enum MXFMetadataSetType type;
257 } MXFMetadataReadTableEntry;
259 static int mxf_read_close(AVFormatContext *s);
261 /* partial keys to match */
262 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
263 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
264 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
265 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
266 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
267 /* complete keys to match */
268 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 };
269 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
270 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
271 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
272 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
274 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
276 static int64_t klv_decode_ber_length(AVIOContext *pb)
278 uint64_t size = avio_r8(pb);
279 if (size & 0x80) { /* long form */
280 int bytes_num = size & 0x7f;
281 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
283 return AVERROR_INVALIDDATA;
286 size = size << 8 | avio_r8(pb);
291 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
294 for (i = 0; i < size && !avio_feof(pb); i++) {
298 else if (b != key[i])
304 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
306 if (!mxf_read_sync(pb, mxf_klv_key, 4))
307 return AVERROR_INVALIDDATA;
308 klv->offset = avio_tell(pb) - 4;
309 memcpy(klv->key, mxf_klv_key, 4);
310 avio_read(pb, klv->key + 4, 12);
311 klv->length = klv_decode_ber_length(pb);
312 return klv->length == -1 ? -1 : 0;
315 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
319 for (i = 0; i < s->nb_streams; i++) {
320 MXFTrack *track = s->streams[i]->priv_data;
322 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
325 /* return 0 if only one stream, for OP Atom files with 0 as track number */
326 return s->nb_streams == 1 ? 0 : -1;
329 /* XXX: use AVBitStreamFilter */
330 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
332 const uint8_t *buf_ptr, *end_ptr;
336 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
337 return AVERROR_INVALIDDATA;
338 length = av_get_packet(pb, pkt, length);
341 data_ptr = pkt->data;
342 end_ptr = pkt->data + length;
343 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
344 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
345 for (i = 0; i < st->codec->channels; i++) {
346 uint32_t sample = bytestream_get_le32(&buf_ptr);
347 if (st->codec->bits_per_coded_sample == 24)
348 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
350 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
352 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
354 av_shrink_packet(pkt, data_ptr - pkt->data);
358 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
360 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
361 MXFContext *mxf = s->priv_data;
362 AVIOContext *pb = s->pb;
363 int64_t end = avio_tell(pb) + klv->length;
366 uint64_t plaintext_size;
371 if (!mxf->aesc && s->key && s->keylen == 16) {
372 mxf->aesc = av_aes_alloc();
374 return AVERROR(ENOMEM);
375 av_aes_init(mxf->aesc, s->key, 128, 1);
378 avio_skip(pb, klv_decode_ber_length(pb));
380 klv_decode_ber_length(pb);
381 plaintext_size = avio_rb64(pb);
383 klv_decode_ber_length(pb);
384 avio_read(pb, klv->key, 16);
385 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
386 return AVERROR_INVALIDDATA;
387 index = mxf_get_stream_index(s, klv);
389 return AVERROR_INVALIDDATA;
391 klv_decode_ber_length(pb);
392 orig_size = avio_rb64(pb);
393 if (orig_size < plaintext_size)
394 return AVERROR_INVALIDDATA;
396 size = klv_decode_ber_length(pb);
397 if (size < 32 || size - 32 < orig_size)
398 return AVERROR_INVALIDDATA;
399 avio_read(pb, ivec, 16);
400 avio_read(pb, tmpbuf, 16);
402 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
403 if (memcmp(tmpbuf, checkv, 16))
404 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
406 size = av_get_packet(pb, pkt, size);
409 else if (size < plaintext_size)
410 return AVERROR_INVALIDDATA;
411 size -= plaintext_size;
413 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
414 &pkt->data[plaintext_size], size >> 4, ivec, 1);
415 av_shrink_packet(pkt, orig_size);
416 pkt->stream_index = index;
417 avio_skip(pb, end - avio_tell(pb));
421 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
423 MXFContext *mxf = arg;
424 int item_num = avio_rb32(pb);
425 int item_len = avio_rb32(pb);
427 if (item_len != 18) {
428 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
429 return AVERROR_PATCHWELCOME;
431 if (item_num > 65536) {
432 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
433 return AVERROR_INVALIDDATA;
436 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
437 av_free(mxf->local_tags);
438 mxf->local_tags_count = 0;
439 mxf->local_tags = av_calloc(item_num, item_len);
440 if (!mxf->local_tags)
441 return AVERROR(ENOMEM);
442 mxf->local_tags_count = item_num;
443 avio_read(pb, mxf->local_tags, item_num*item_len);
447 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
449 MXFContext *mxf = arg;
450 MXFPartition *partition, *tmp_part;
452 uint64_t footer_partition;
453 uint32_t nb_essence_containers;
455 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
457 return AVERROR(ENOMEM);
458 mxf->partitions = tmp_part;
460 if (mxf->parsing_backward) {
461 /* insert the new partition pack in the middle
462 * this makes the entries in mxf->partitions sorted by offset */
463 memmove(&mxf->partitions[mxf->last_forward_partition+1],
464 &mxf->partitions[mxf->last_forward_partition],
465 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
466 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
468 mxf->last_forward_partition++;
469 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
472 memset(partition, 0, sizeof(*partition));
473 mxf->partitions_count++;
474 partition->pack_length = avio_tell(pb) - klv_offset + size;
475 partition->pack_ofs = klv_offset;
479 partition->type = Header;
482 partition->type = BodyPartition;
485 partition->type = Footer;
488 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
489 return AVERROR_INVALIDDATA;
492 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
493 partition->closed = partition->type == Footer || !(uid[14] & 1);
494 partition->complete = uid[14] > 2;
496 partition->kag_size = avio_rb32(pb);
497 partition->this_partition = avio_rb64(pb);
498 partition->previous_partition = avio_rb64(pb);
499 footer_partition = avio_rb64(pb);
500 partition->header_byte_count = avio_rb64(pb);
501 partition->index_byte_count = avio_rb64(pb);
502 partition->index_sid = avio_rb32(pb);
504 partition->body_sid = avio_rb32(pb);
505 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
506 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
507 return AVERROR_INVALIDDATA;
509 nb_essence_containers = avio_rb32(pb);
511 if (partition->this_partition &&
512 partition->previous_partition == partition->this_partition) {
513 av_log(mxf->fc, AV_LOG_ERROR,
514 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
515 partition->previous_partition);
516 /* override with the actual previous partition offset */
517 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
519 mxf->partitions + mxf->last_forward_partition - 2;
520 partition->previous_partition = prev->this_partition;
522 /* if no previous body partition are found point to the header
524 if (partition->previous_partition == partition->this_partition)
525 partition->previous_partition = 0;
526 av_log(mxf->fc, AV_LOG_ERROR,
527 "Overriding PreviousPartition with %"PRIx64"\n",
528 partition->previous_partition);
531 /* some files don'thave FooterPartition set in every partition */
532 if (footer_partition) {
533 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
534 av_log(mxf->fc, AV_LOG_ERROR,
535 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
536 mxf->footer_partition, footer_partition);
538 mxf->footer_partition = footer_partition;
543 "PartitionPack: ThisPartition = 0x%"PRIX64
544 ", PreviousPartition = 0x%"PRIX64", "
545 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
546 partition->this_partition,
547 partition->previous_partition, footer_partition,
548 partition->index_sid, partition->body_sid);
550 /* sanity check PreviousPartition if set */
551 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
552 if (partition->previous_partition &&
553 mxf->run_in + partition->previous_partition >= klv_offset) {
554 av_log(mxf->fc, AV_LOG_ERROR,
555 "PreviousPartition points to this partition or forward\n");
556 return AVERROR_INVALIDDATA;
559 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
560 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
561 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
562 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
563 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
564 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
565 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
566 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
567 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
568 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
569 else if (op[12] == 0x10) {
570 /* SMPTE 390m: "There shall be exactly one essence container"
571 * The following block deals with files that violate this, namely:
572 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
573 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
574 if (nb_essence_containers != 1) {
575 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
579 av_log(mxf->fc, AV_LOG_WARNING,
580 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
581 nb_essence_containers,
582 op == OP1a ? "OP1a" : "OPAtom");
588 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
592 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
593 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
594 partition->kag_size);
596 if (mxf->op == OPSONYOpt)
597 partition->kag_size = 512;
599 partition->kag_size = 1;
601 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
607 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
609 MXFMetadataSet **tmp;
611 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
613 return AVERROR(ENOMEM);
614 mxf->metadata_sets = tmp;
615 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
616 mxf->metadata_sets_count++;
620 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
622 MXFCryptoContext *cryptocontext = arg;
624 return AVERROR_INVALIDDATA;
625 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
626 avio_read(pb, cryptocontext->source_container_ul, 16);
630 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
632 MXFContext *mxf = arg;
635 if (mxf->packages_refs)
636 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
637 av_free(mxf->packages_refs);
638 mxf->packages_count = avio_rb32(pb);
639 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
640 if (!mxf->packages_refs)
641 return AVERROR(ENOMEM);
642 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
643 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
649 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
651 MXFStructuralComponent *source_clip = arg;
654 source_clip->duration = avio_rb64(pb);
657 source_clip->start_position = avio_rb64(pb);
660 /* UMID, only get last 16 bytes */
662 avio_read(pb, source_clip->source_package_uid, 16);
665 source_clip->source_track_id = avio_rb32(pb);
671 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
673 MXFPackage *package = arg;
676 package->tracks_count = avio_rb32(pb);
677 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
678 if (!package->tracks_refs)
679 return AVERROR(ENOMEM);
680 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
681 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
687 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
689 MXFTimecodeComponent *mxf_timecode = arg;
692 mxf_timecode->start_frame = avio_rb64(pb);
695 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
698 mxf_timecode->drop_frame = avio_r8(pb);
704 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
706 MXFPulldownComponent *mxf_pulldown = arg;
709 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
715 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
717 MXFTrack *track = arg;
720 track->track_id = avio_rb32(pb);
723 avio_read(pb, track->track_number, 4);
726 track->edit_rate.num = avio_rb32(pb);
727 track->edit_rate.den = avio_rb32(pb);
730 avio_read(pb, track->sequence_ref, 16);
736 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
738 MXFSequence *sequence = arg;
741 sequence->duration = avio_rb64(pb);
744 avio_read(pb, sequence->data_definition_ul, 16);
747 sequence->origin = avio_r8(pb);
750 sequence->structural_components_count = avio_rb32(pb);
751 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
752 if (!sequence->structural_components_refs)
753 return AVERROR(ENOMEM);
754 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
755 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
761 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
767 return AVERROR(EINVAL);
769 buf_size = size + size / 2 + 1;
770 *str = av_malloc(buf_size);
772 return AVERROR(ENOMEM);
774 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
782 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
784 MXFPackage *package = arg;
787 package->tracks_count = avio_rb32(pb);
788 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
789 if (!package->tracks_refs)
790 return AVERROR(ENOMEM);
791 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
792 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
795 /* UMID, only get last 16 bytes */
797 avio_read(pb, package->package_uid, 16);
800 avio_read(pb, package->descriptor_ref, 16);
803 return mxf_read_utf16_string(pb, size, &package->name);
808 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
812 segment->nb_index_entries = avio_rb32(pb);
814 length = avio_rb32(pb);
816 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
817 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
818 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
819 return AVERROR(ENOMEM);
821 for (i = 0; i < segment->nb_index_entries; i++) {
822 segment->temporal_offset_entries[i] = avio_r8(pb);
823 avio_r8(pb); /* KeyFrameOffset */
824 segment->flag_entries[i] = avio_r8(pb);
825 segment->stream_offset_entries[i] = avio_rb64(pb);
826 avio_skip(pb, length - 11);
831 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
833 MXFIndexTableSegment *segment = arg;
836 segment->edit_unit_byte_count = avio_rb32(pb);
837 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
840 segment->index_sid = avio_rb32(pb);
841 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
844 segment->body_sid = avio_rb32(pb);
845 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
848 av_dlog(NULL, "IndexEntryArray found\n");
849 return mxf_read_index_entry_array(pb, segment);
851 segment->index_edit_rate.num = avio_rb32(pb);
852 segment->index_edit_rate.den = avio_rb32(pb);
853 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
854 segment->index_edit_rate.den);
857 segment->index_start_position = avio_rb64(pb);
858 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
861 segment->index_duration = avio_rb64(pb);
862 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
868 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
870 int code, value, ofs = 0;
871 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
876 av_dlog(NULL, "pixel layout: code %#x\n", code);
879 layout[ofs++] = code;
880 layout[ofs++] = value;
882 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
883 } while (code != 0); /* SMPTE 377M E.2.46 */
885 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
888 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
890 MXFDescriptor *descriptor = arg;
891 descriptor->pix_fmt = AV_PIX_FMT_NONE;
894 descriptor->sub_descriptors_count = avio_rb32(pb);
895 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
896 if (!descriptor->sub_descriptors_refs)
897 return AVERROR(ENOMEM);
898 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
899 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
902 avio_read(pb, descriptor->essence_container_ul, 16);
905 descriptor->linked_track_id = avio_rb32(pb);
907 case 0x3201: /* PictureEssenceCoding */
908 avio_read(pb, descriptor->essence_codec_ul, 16);
911 descriptor->width = avio_rb32(pb);
914 descriptor->height = avio_rb32(pb);
917 descriptor->frame_layout = avio_r8(pb);
920 descriptor->aspect_ratio.num = avio_rb32(pb);
921 descriptor->aspect_ratio.den = avio_rb32(pb);
924 descriptor->field_dominance = avio_r8(pb);
927 descriptor->component_depth = avio_rb32(pb);
930 descriptor->horiz_subsampling = avio_rb32(pb);
933 descriptor->vert_subsampling = avio_rb32(pb);
936 descriptor->sample_rate.num = avio_rb32(pb);
937 descriptor->sample_rate.den = avio_rb32(pb);
939 case 0x3D06: /* SoundEssenceCompression */
940 avio_read(pb, descriptor->essence_codec_ul, 16);
943 descriptor->channels = avio_rb32(pb);
946 descriptor->bits_per_sample = avio_rb32(pb);
949 mxf_read_pixel_layout(pb, descriptor);
952 /* Private uid used by SONY C0023S01.mxf */
953 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
954 if (descriptor->extradata)
955 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
956 av_free(descriptor->extradata);
957 descriptor->extradata_size = 0;
958 descriptor->extradata = av_malloc(size);
959 if (!descriptor->extradata)
960 return AVERROR(ENOMEM);
961 descriptor->extradata_size = size;
962 avio_read(pb, descriptor->extradata, size);
970 * Match an uid independently of the version byte and up to len common bytes
973 static int mxf_match_uid(const UID key, const UID uid, int len)
976 for (i = 0; i < len; i++) {
977 if (i != 7 && key[i] != uid[i])
983 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
985 while (uls->uid[0]) {
986 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
993 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
999 for (i = 0; i < mxf->metadata_sets_count; i++) {
1000 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1001 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1002 return mxf->metadata_sets[i];
1008 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1009 // video essence container uls
1010 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
1011 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1012 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1013 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1016 /* EC ULs for intra-only formats */
1017 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1018 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
1019 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1022 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1023 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1024 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
1025 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1026 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1029 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1030 // sound essence container uls
1031 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
1032 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
1033 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
1034 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
1035 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
1036 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1039 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1040 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1041 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1044 static const char* const mxf_data_essence_descriptor[] = {
1045 "vbi_vanc_smpte_436M",
1048 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1050 int i, j, nb_segments = 0;
1051 MXFIndexTableSegment **unsorted_segments;
1052 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1054 /* count number of segments, allocate arrays and copy unsorted segments */
1055 for (i = 0; i < mxf->metadata_sets_count; i++)
1056 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1060 return AVERROR_INVALIDDATA;
1062 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1063 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1064 av_freep(sorted_segments);
1065 av_free(unsorted_segments);
1066 return AVERROR(ENOMEM);
1069 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1070 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1071 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1073 *nb_sorted_segments = 0;
1075 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1076 for (i = 0; i < nb_segments; i++) {
1077 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1078 uint64_t best_index_duration = 0;
1080 for (j = 0; j < nb_segments; j++) {
1081 MXFIndexTableSegment *s = unsorted_segments[j];
1083 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1084 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1085 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1087 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1088 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1089 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1091 best_body_sid = s->body_sid;
1092 best_index_sid = s->index_sid;
1093 best_index_start = s->index_start_position;
1094 best_index_duration = s->index_duration;
1098 /* no suitable entry found -> we're done */
1102 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1103 last_body_sid = best_body_sid;
1104 last_index_sid = best_index_sid;
1105 last_index_start = best_index_start;
1108 av_free(unsorted_segments);
1114 * Computes the absolute file offset of the given essence container offset
1116 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1119 int64_t offset_in = offset; /* for logging */
1121 for (x = 0; x < mxf->partitions_count; x++) {
1122 MXFPartition *p = &mxf->partitions[x];
1124 if (p->body_sid != body_sid)
1127 if (offset < p->essence_length || !p->essence_length) {
1128 *offset_out = p->essence_offset + offset;
1132 offset -= p->essence_length;
1135 av_log(mxf->fc, AV_LOG_ERROR,
1136 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1137 offset_in, body_sid);
1139 return AVERROR_INVALIDDATA;
1143 * Returns the end position of the essence container with given BodySID, or zero if unknown
1145 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1150 for (x = 0; x < mxf->partitions_count; x++) {
1151 MXFPartition *p = &mxf->partitions[x];
1153 if (p->body_sid != body_sid)
1156 if (!p->essence_length)
1159 ret = p->essence_offset + p->essence_length;
1165 /* EditUnit -> absolute offset */
1166 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)
1169 int64_t offset_temp = 0;
1171 for (i = 0; i < index_table->nb_segments; i++) {
1172 MXFIndexTableSegment *s = index_table->segments[i];
1174 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1176 if (edit_unit < s->index_start_position + s->index_duration) {
1177 int64_t index = edit_unit - s->index_start_position;
1179 if (s->edit_unit_byte_count)
1180 offset_temp += s->edit_unit_byte_count * index;
1181 else if (s->nb_index_entries) {
1182 if (s->nb_index_entries == 2 * s->index_duration + 1)
1183 index *= 2; /* Avid index */
1185 if (index < 0 || index >= s->nb_index_entries) {
1186 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1187 index_table->index_sid, s->index_start_position);
1188 return AVERROR_INVALIDDATA;
1191 offset_temp = s->stream_offset_entries[index];
1193 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1194 index_table->index_sid, s->index_start_position);
1195 return AVERROR_INVALIDDATA;
1199 *edit_unit_out = edit_unit;
1201 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1203 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1204 offset_temp += s->edit_unit_byte_count * s->index_duration;
1209 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);
1211 return AVERROR_INVALIDDATA;
1214 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1217 int8_t max_temporal_offset = -128;
1219 /* first compute how many entries we have */
1220 for (i = 0; i < index_table->nb_segments; i++) {
1221 MXFIndexTableSegment *s = index_table->segments[i];
1223 if (!s->nb_index_entries) {
1224 index_table->nb_ptses = 0;
1225 return 0; /* no TemporalOffsets */
1228 index_table->nb_ptses += s->index_duration;
1231 /* paranoid check */
1232 if (index_table->nb_ptses <= 0)
1235 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1236 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1237 av_freep(&index_table->ptses);
1238 return AVERROR(ENOMEM);
1241 /* we may have a few bad TemporalOffsets
1242 * make sure the corresponding PTSes don't have the bogus value 0 */
1243 for (x = 0; x < index_table->nb_ptses; x++)
1244 index_table->ptses[x] = AV_NOPTS_VALUE;
1258 * We want to transform it into this:
1269 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1270 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1271 * The latter makes DTS <= PTS.
1273 for (i = x = 0; i < index_table->nb_segments; i++) {
1274 MXFIndexTableSegment *s = index_table->segments[i];
1275 int index_delta = 1;
1276 int n = s->nb_index_entries;
1278 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1279 index_delta = 2; /* Avid index */
1280 /* ignore the last entry - it's the size of the essence container */
1284 for (j = 0; j < n; j += index_delta, x++) {
1285 int offset = s->temporal_offset_entries[j] / index_delta;
1286 int index = x + offset;
1288 if (x >= index_table->nb_ptses) {
1289 av_log(mxf->fc, AV_LOG_ERROR,
1290 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1291 s->nb_index_entries, s->index_duration);
1295 index_table->fake_index[x].timestamp = x;
1296 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1298 if (index < 0 || index >= index_table->nb_ptses) {
1299 av_log(mxf->fc, AV_LOG_ERROR,
1300 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1305 index_table->ptses[index] = x;
1306 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1310 index_table->first_dts = -max_temporal_offset;
1316 * Sorts and collects index table segments into index tables.
1317 * Also computes PTSes if possible.
1319 static int mxf_compute_index_tables(MXFContext *mxf)
1321 int i, j, k, ret, nb_sorted_segments;
1322 MXFIndexTableSegment **sorted_segments = NULL;
1324 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1325 nb_sorted_segments <= 0) {
1326 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1330 /* sanity check and count unique BodySIDs/IndexSIDs */
1331 for (i = 0; i < nb_sorted_segments; i++) {
1332 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1333 mxf->nb_index_tables++;
1334 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1335 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1336 ret = AVERROR_INVALIDDATA;
1337 goto finish_decoding_index;
1341 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1342 sizeof(*mxf->index_tables));
1343 if (!mxf->index_tables) {
1344 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1345 ret = AVERROR(ENOMEM);
1346 goto finish_decoding_index;
1349 /* distribute sorted segments to index tables */
1350 for (i = j = 0; i < nb_sorted_segments; i++) {
1351 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1356 mxf->index_tables[j].nb_segments++;
1359 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1360 MXFIndexTable *t = &mxf->index_tables[j];
1362 t->segments = av_mallocz_array(t->nb_segments,
1363 sizeof(*t->segments));
1366 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1367 " pointer array\n");
1368 ret = AVERROR(ENOMEM);
1369 goto finish_decoding_index;
1372 if (sorted_segments[i]->index_start_position)
1373 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1374 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1376 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1377 t->index_sid = sorted_segments[i]->index_sid;
1378 t->body_sid = sorted_segments[i]->body_sid;
1380 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1381 goto finish_decoding_index;
1383 /* fix zero IndexDurations */
1384 for (k = 0; k < t->nb_segments; k++) {
1385 if (t->segments[k]->index_duration)
1388 if (t->nb_segments > 1)
1389 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1392 if (mxf->fc->nb_streams <= 0) {
1393 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1397 /* assume the first stream's duration is reasonable
1398 * leave index_duration = 0 on further segments in case we have any (unlikely)
1400 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1406 finish_decoding_index:
1407 av_free(sorted_segments);
1411 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1413 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1414 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1415 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1416 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1419 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1421 char buf[AV_TIMECODE_STR_SIZE];
1422 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1427 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1429 MXFPackage *temp_package = NULL;
1430 MXFPackage *physical_package = NULL;
1431 MXFTrack *physical_track = NULL;
1432 MXFStructuralComponent *component = NULL;
1433 MXFStructuralComponent *sourceclip = NULL;
1434 MXFTimecodeComponent *mxf_tc = NULL;
1435 MXFPulldownComponent *mxf_pulldown = NULL;
1439 int64_t start_position;
1441 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1442 component = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1446 for (j = 0; j < mxf->packages_count; j++) {
1447 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[j], SourcePackage);
1450 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)){
1451 physical_package = temp_package;
1452 sourceclip = component;
1456 if (!physical_package)
1459 /* the name of physical source package is name of the reel or tape */
1460 if (physical_package->name && physical_package->name[0])
1461 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1463 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1464 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1466 for (j = 0; j < physical_package->tracks_count; j++) {
1467 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1468 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1472 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1473 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1477 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1478 component = mxf_resolve_strong_ref(mxf, &physical_track->sequence->structural_components_refs[k], TimecodeComponent);
1480 /* timcode component may be located on a pulldown component */
1481 component = mxf_resolve_strong_ref(mxf, &physical_track->sequence->structural_components_refs[k], PulldownComponent);
1484 mxf_pulldown = (MXFPulldownComponent*)component;
1485 component = mxf_resolve_strong_ref(mxf, &mxf_pulldown->input_segment_ref, TimecodeComponent);
1490 mxf_tc = (MXFTimecodeComponent*)component;
1491 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1492 /* scale sourceclip start_position to match physical track edit rate */
1493 start_position = av_rescale_q(sourceclip->start_position,
1494 physical_track->edit_rate,
1495 source_track->edit_rate);
1497 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1498 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1508 static int mxf_parse_structural_metadata(MXFContext *mxf)
1510 MXFPackage *material_package = NULL;
1511 MXFPackage *temp_package = NULL;
1514 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1515 /* TODO: handle multiple material packages (OP3x) */
1516 for (i = 0; i < mxf->packages_count; i++) {
1517 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1518 if (material_package) break;
1520 if (!material_package) {
1521 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1522 return AVERROR_INVALIDDATA;
1525 for (i = 0; i < material_package->tracks_count; i++) {
1526 MXFPackage *source_package = NULL;
1527 MXFTrack *material_track = NULL;
1528 MXFTrack *source_track = NULL;
1529 MXFTrack *temp_track = NULL;
1530 MXFDescriptor *descriptor = NULL;
1531 MXFStructuralComponent *component = NULL;
1532 MXFTimecodeComponent *mxf_tc = NULL;
1533 UID *essence_container_ul = NULL;
1534 const MXFCodecUL *codec_ul = NULL;
1535 const MXFCodecUL *container_ul = NULL;
1536 const MXFCodecUL *pix_fmt_ul = NULL;
1541 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1542 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1546 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1547 mxf_tc = (MXFTimecodeComponent*)component;
1548 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1549 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1550 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1554 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1555 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1559 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1560 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1564 mxf_tc = (MXFTimecodeComponent*)component;
1565 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1566 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1567 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1572 /* TODO: handle multiple source clips */
1573 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1574 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1578 for (k = 0; k < mxf->packages_count; k++) {
1579 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1582 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1583 source_package = temp_package;
1587 if (!source_package) {
1588 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1591 for (k = 0; k < source_package->tracks_count; k++) {
1592 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1593 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1594 ret = AVERROR_INVALIDDATA;
1597 if (temp_track->track_id == component->source_track_id) {
1598 source_track = temp_track;
1602 if (!source_track) {
1603 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1607 if (!source_track || !component)
1610 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1611 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1612 ret = AVERROR_INVALIDDATA;
1616 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1617 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1618 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1619 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1623 st = avformat_new_stream(mxf->fc, NULL);
1625 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1626 ret = AVERROR(ENOMEM);
1629 st->id = source_track->track_id;
1630 st->priv_data = source_track;
1631 source_track->original_duration = st->duration = component->duration;
1632 if (st->duration == -1)
1633 st->duration = AV_NOPTS_VALUE;
1634 st->start_time = component->start_position;
1635 if (material_track->edit_rate.num <= 0 ||
1636 material_track->edit_rate.den <= 0) {
1637 av_log(mxf->fc, AV_LOG_WARNING,
1638 "Invalid edit rate (%d/%d) found on stream #%d, "
1639 "defaulting to 25/1\n",
1640 material_track->edit_rate.num,
1641 material_track->edit_rate.den, st->index);
1642 material_track->edit_rate = (AVRational){25, 1};
1644 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1646 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1647 * the former is accessible via st->priv_data */
1648 source_track->edit_rate = material_track->edit_rate;
1650 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1651 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1652 st->codec->codec_type = codec_ul->id;
1654 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1655 if (source_package->descriptor) {
1656 if (source_package->descriptor->type == MultipleDescriptor) {
1657 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1658 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1660 if (!sub_descriptor) {
1661 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1664 if (sub_descriptor->linked_track_id == source_track->track_id) {
1665 descriptor = sub_descriptor;
1669 } else if (source_package->descriptor->type == Descriptor)
1670 descriptor = source_package->descriptor;
1673 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1676 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1677 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1678 essence_container_ul = &descriptor->essence_container_ul;
1679 /* HACK: replacing the original key with mxf_encrypted_essence_container
1680 * is not allowed according to s429-6, try to find correct information anyway */
1681 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1682 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1683 for (k = 0; k < mxf->metadata_sets_count; k++) {
1684 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1685 if (metadata->type == CryptoContext) {
1686 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1692 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1693 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1694 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1695 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1696 avcodec_get_name(st->codec->codec_id));
1697 for (k = 0; k < 16; k++) {
1698 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1699 descriptor->essence_codec_ul[k]);
1700 if (!(k+1 & 19) || k == 5)
1701 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1703 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1705 mxf_parse_physical_source_package(mxf, source_track, st);
1707 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1708 source_track->intra_only = mxf_is_intra_only(descriptor);
1709 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1710 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1711 st->codec->codec_id = container_ul->id;
1712 st->codec->width = descriptor->width;
1713 st->codec->height = descriptor->height; /* Field height, not frame height */
1714 switch (descriptor->frame_layout) {
1715 case SegmentedFrame:
1716 /* This one is a weird layout I don't fully understand. */
1717 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1720 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1723 /* Every other line is stored and needs to be duplicated. */
1724 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1725 break; /* The correct thing to do here is fall through, but by breaking we might be
1726 able to decode some streams at half the vertical resolution, rather than not al all.
1727 It's also for compatibility with the old behavior. */
1730 case SeparateFields:
1731 switch (descriptor->field_dominance) {
1733 st->codec->field_order = AV_FIELD_TT;
1736 st->codec->field_order = AV_FIELD_BB;
1739 avpriv_request_sample(mxf->fc,
1740 "Field dominance %d support",
1741 descriptor->field_dominance);
1744 /* Turn field height into frame height. */
1745 st->codec->height *= 2;
1748 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1750 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1751 st->codec->pix_fmt = descriptor->pix_fmt;
1752 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1753 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1754 &descriptor->essence_codec_ul);
1755 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1756 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1757 /* support files created before RP224v10 by defaulting to UYVY422
1758 if subsampling is 4:2:2 and component depth is 8-bit */
1759 if (descriptor->horiz_subsampling == 2 &&
1760 descriptor->vert_subsampling == 1 &&
1761 descriptor->component_depth == 8) {
1762 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1767 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1768 if (material_track->sequence->origin) {
1769 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
1771 if (source_track->sequence->origin) {
1772 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
1774 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1775 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1776 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1777 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
1778 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1779 st->codec->channels = descriptor->channels;
1780 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1782 if (descriptor->sample_rate.den > 0) {
1783 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1784 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1786 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1787 "found for stream #%d, time base forced to 1/48000\n",
1788 descriptor->sample_rate.num, descriptor->sample_rate.den,
1790 avpriv_set_pts_info(st, 64, 1, 48000);
1793 /* if duration is set, rescale it from EditRate to SampleRate */
1794 if (st->duration != AV_NOPTS_VALUE)
1795 st->duration = av_rescale_q(st->duration,
1796 av_inv_q(material_track->edit_rate),
1799 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1800 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1801 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1802 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1803 else if (descriptor->bits_per_sample == 32)
1804 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1805 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1806 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1807 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1808 else if (descriptor->bits_per_sample == 32)
1809 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1810 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1811 st->need_parsing = AVSTREAM_PARSE_FULL;
1813 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1814 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
1815 essence_container_ul)->id;
1816 if (codec_id >= 0 &&
1817 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
1818 av_dict_set(&st->metadata, "data_type",
1819 mxf_data_essence_descriptor[codec_id], 0);
1822 if (descriptor->extradata) {
1823 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1824 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1826 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1827 ret = ff_generate_avci_extradata(st);
1831 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1832 /* TODO: decode timestamps */
1833 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1842 static int mxf_uid_to_str(UID uid, char **str)
1846 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1848 return AVERROR(ENOMEM);
1849 for (i = 0; i < sizeof(UID); i++) {
1850 snprintf(p, 2 + 1, "%.2x", uid[i]);
1852 if (i == 3 || i == 5 || i == 7 || i == 9) {
1853 snprintf(p, 1 + 1, "-");
1860 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1862 struct tm time = { 0 };
1863 time.tm_year = (timestamp >> 48) - 1900;
1864 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1865 time.tm_mday = (timestamp >> 32 & 0xFF);
1866 time.tm_hour = (timestamp >> 24 & 0xFF);
1867 time.tm_min = (timestamp >> 16 & 0xFF);
1868 time.tm_sec = (timestamp >> 8 & 0xFF);
1870 /* msvcrt versions of strftime calls the invalid parameter handler
1871 * (aborting the process if one isn't set) if the parameters are out
1873 time.tm_mon = av_clip(time.tm_mon, 0, 11);
1874 time.tm_mday = av_clip(time.tm_mday, 1, 31);
1875 time.tm_hour = av_clip(time.tm_hour, 0, 23);
1876 time.tm_min = av_clip(time.tm_min, 0, 59);
1877 time.tm_sec = av_clip(time.tm_sec, 0, 59);
1879 *str = av_mallocz(32);
1881 return AVERROR(ENOMEM);
1882 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
1888 #define SET_STR_METADATA(pb, name, str) do { \
1889 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1891 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1894 #define SET_UID_METADATA(pb, name, var, str) do { \
1895 avio_read(pb, var, 16); \
1896 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1898 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1901 #define SET_TS_METADATA(pb, name, var, str) do { \
1902 var = avio_rb64(pb); \
1903 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1905 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1908 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1910 MXFContext *mxf = arg;
1911 AVFormatContext *s = mxf->fc;
1918 SET_STR_METADATA(pb, "company_name", str);
1921 SET_STR_METADATA(pb, "product_name", str);
1924 SET_STR_METADATA(pb, "product_version", str);
1927 SET_UID_METADATA(pb, "product_uid", uid, str);
1930 SET_TS_METADATA(pb, "modification_date", ts, str);
1933 SET_STR_METADATA(pb, "application_platform", str);
1936 SET_UID_METADATA(pb, "generation_uid", uid, str);
1939 SET_UID_METADATA(pb, "uid", uid, str);
1945 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1946 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1947 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1948 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1949 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1950 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1951 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1952 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1953 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1954 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1955 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1956 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1957 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1958 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1959 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1960 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1961 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1962 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1963 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1964 { { 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 */
1965 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1966 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1967 { { 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 */
1968 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1969 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1970 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
1971 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5c,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VANC/VBI - SMPTE 436M */
1972 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
1973 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1974 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1975 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1976 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
1977 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1978 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1979 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1982 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1984 AVIOContext *pb = mxf->fc->pb;
1985 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1986 uint64_t klv_end = avio_tell(pb) + klv->length;
1989 return AVERROR(ENOMEM);
1990 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
1992 int tag = avio_rb16(pb);
1993 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1994 uint64_t next = avio_tell(pb) + size;
1997 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1998 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1999 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2002 if (tag > 0x7FFF) { /* dynamic tag */
2004 for (i = 0; i < mxf->local_tags_count; i++) {
2005 int local_tag = AV_RB16(mxf->local_tags+i*18);
2006 if (local_tag == tag) {
2007 memcpy(uid, mxf->local_tags+i*18+2, 16);
2008 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
2009 PRINT_KEY(mxf->fc, "uid", uid);
2013 if (ctx_size && tag == 0x3C0A)
2014 avio_read(pb, ctx->uid, 16);
2015 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
2018 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2019 * it extending past the end of the KLV though (zzuf5.mxf). */
2020 if (avio_tell(pb) > klv_end) {
2024 av_log(mxf->fc, AV_LOG_ERROR,
2025 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2027 return AVERROR_INVALIDDATA;
2028 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2029 avio_seek(pb, next, SEEK_SET);
2031 if (ctx_size) ctx->type = type;
2032 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2036 * Matches any partition pack key, in other words:
2040 * @return non-zero if the key is a partition pack key, zero otherwise
2042 static int mxf_is_partition_pack_key(UID key)
2044 //NOTE: this is a little lax since it doesn't constraint key[14]
2045 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2046 key[13] >= 2 && key[13] <= 4;
2050 * Parses a metadata KLV
2051 * @return <0 on error, 0 otherwise
2053 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2054 int ctx_size, enum MXFMetadataSetType type)
2056 AVFormatContext *s = mxf->fc;
2058 if (klv.key[5] == 0x53) {
2059 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2061 uint64_t next = avio_tell(s->pb) + klv.length;
2062 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2064 /* only seek forward, else this can loop for a long time */
2065 if (avio_tell(s->pb) > next) {
2066 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2068 return AVERROR_INVALIDDATA;
2071 avio_seek(s->pb, next, SEEK_SET);
2074 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2081 * Seeks to the previous partition and parses it, if possible
2082 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2084 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2086 AVIOContext *pb = mxf->fc->pb;
2088 int64_t current_partition_ofs;
2091 if (!mxf->current_partition ||
2092 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2093 return 0; /* we've parsed all partitions */
2095 /* seek to previous partition */
2096 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2097 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2098 mxf->current_partition = NULL;
2100 av_dlog(mxf->fc, "seeking to previous partition\n");
2102 /* Make sure this is actually a PartitionPack, and if so parse it.
2105 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2106 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2110 if (!mxf_is_partition_pack_key(klv.key)) {
2111 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2112 return AVERROR_INVALIDDATA;
2115 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2116 * can point to just before the current partition, causing klv_read_packet()
2117 * to sync back up to it. See deadlock3.mxf
2119 if (klv.offset >= current_partition_ofs) {
2120 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2121 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2122 return AVERROR_INVALIDDATA;
2125 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2132 * Called when essence is encountered
2133 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2135 static int mxf_parse_handle_essence(MXFContext *mxf)
2137 AVIOContext *pb = mxf->fc->pb;
2140 if (mxf->parsing_backward) {
2141 return mxf_seek_to_previous_partition(mxf);
2143 if (!mxf->footer_partition) {
2144 av_dlog(mxf->fc, "no FooterPartition\n");
2148 av_dlog(mxf->fc, "seeking to FooterPartition\n");
2150 /* remember where we were so we don't end up seeking further back than this */
2151 mxf->last_forward_tell = avio_tell(pb);
2153 if (!pb->seekable) {
2154 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2158 /* seek to FooterPartition and parse backward */
2159 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2160 av_log(mxf->fc, AV_LOG_ERROR,
2161 "failed to seek to FooterPartition @ 0x%" PRIx64
2162 " (%"PRId64") - partial file?\n",
2163 mxf->run_in + mxf->footer_partition, ret);
2167 mxf->current_partition = NULL;
2168 mxf->parsing_backward = 1;
2175 * Called when the next partition or EOF is encountered
2176 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2178 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2180 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2184 * Figures out the proper offset and length of the essence container in each partition
2186 static void mxf_compute_essence_containers(MXFContext *mxf)
2190 /* everything is already correct */
2191 if (mxf->op == OPAtom)
2194 for (x = 0; x < mxf->partitions_count; x++) {
2195 MXFPartition *p = &mxf->partitions[x];
2198 continue; /* BodySID == 0 -> no essence */
2200 if (x >= mxf->partitions_count - 1)
2201 break; /* FooterPartition - can't compute length (and we don't need to) */
2203 /* essence container spans to the next partition */
2204 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2206 if (p->essence_length < 0) {
2207 /* next ThisPartition < essence_offset */
2208 p->essence_length = 0;
2209 av_log(mxf->fc, AV_LOG_ERROR,
2210 "partition %i: bad ThisPartition = %"PRIX64"\n",
2211 x+1, mxf->partitions[x+1].this_partition);
2216 static int64_t round_to_kag(int64_t position, int kag_size)
2218 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2219 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2220 int64_t ret = (position / kag_size) * kag_size;
2221 return ret == position ? ret : ret + kag_size;
2224 static int is_pcm(enum AVCodecID codec_id)
2226 /* we only care about "normal" PCM codecs until we get samples */
2227 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2231 * Deal with the case where for some audio atoms EditUnitByteCount is
2232 * very small (2, 4..). In those cases we should read more than one
2233 * sample per call to mxf_read_packet().
2235 static void mxf_handle_small_eubc(AVFormatContext *s)
2237 MXFContext *mxf = s->priv_data;
2239 /* assuming non-OPAtom == frame wrapped
2240 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2241 if (mxf->op != OPAtom)
2244 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2245 if (s->nb_streams != 1 ||
2246 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2247 !is_pcm(s->streams[0]->codec->codec_id) ||
2248 mxf->nb_index_tables != 1 ||
2249 mxf->index_tables[0].nb_segments != 1 ||
2250 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2253 /* arbitrarily default to 48 kHz PAL audio frame size */
2254 /* TODO: We could compute this from the ratio between the audio
2255 * and video edit rates for 48 kHz NTSC we could use the
2256 * 1802-1802-1802-1802-1801 pattern. */
2257 mxf->edit_units_per_packet = 1920;
2260 static void mxf_read_random_index_pack(AVFormatContext *s)
2262 MXFContext *mxf = s->priv_data;
2264 int64_t file_size, max_rip_length, min_rip_length;
2267 if (!s->pb->seekable)
2270 file_size = avio_size(s->pb);
2272 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2273 * The limit below assumes a file with nothing but partition packs and a RIP.
2274 * Before changing this, consider that a muxer may place each sample in its own partition.
2276 * 105 is the size of the smallest possible PartitionPack
2277 * 12 is the size of each RIP entry
2278 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2280 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2281 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2283 /* We're only interested in RIPs with at least two entries.. */
2284 min_rip_length = 16+1+24+4;
2286 /* See S377m section 11 */
2287 avio_seek(s->pb, file_size - 4, SEEK_SET);
2288 length = avio_rb32(s->pb);
2290 if (length < min_rip_length || length > max_rip_length)
2292 avio_seek(s->pb, file_size - length, SEEK_SET);
2293 if (klv_read_packet(&klv, s->pb) < 0 ||
2294 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2295 klv.length != length - 20)
2298 avio_skip(s->pb, klv.length - 12);
2299 mxf->footer_partition = avio_rb64(s->pb);
2302 if (mxf->run_in + mxf->footer_partition >= file_size) {
2303 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2304 mxf->footer_partition = 0;
2308 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2311 static int mxf_read_header(AVFormatContext *s)
2313 MXFContext *mxf = s->priv_data;
2315 int64_t essence_offset = 0;
2318 mxf->last_forward_tell = INT64_MAX;
2319 mxf->edit_units_per_packet = 1;
2321 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2322 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2323 return AVERROR_INVALIDDATA;
2325 avio_seek(s->pb, -14, SEEK_CUR);
2327 mxf->run_in = avio_tell(s->pb);
2329 mxf_read_random_index_pack(s);
2331 while (!avio_feof(s->pb)) {
2332 const MXFMetadataReadTableEntry *metadata;
2334 if (klv_read_packet(&klv, s->pb) < 0) {
2335 /* EOF - seek to previous partition or stop */
2336 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2342 PRINT_KEY(s, "read header", klv.key);
2343 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2344 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2345 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2346 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2347 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2349 if (!mxf->current_partition) {
2350 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2351 return AVERROR_INVALIDDATA;
2354 if (!mxf->current_partition->essence_offset) {
2355 /* for OP1a we compute essence_offset
2356 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2357 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2358 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2360 int64_t op1a_essence_offset =
2361 round_to_kag(mxf->current_partition->this_partition +
2362 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2363 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2364 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2366 if (mxf->op == OPAtom) {
2367 /* point essence_offset to the actual data
2368 * OPAtom has all the essence in one big KLV
2370 mxf->current_partition->essence_offset = avio_tell(s->pb);
2371 mxf->current_partition->essence_length = klv.length;
2373 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2374 mxf->current_partition->essence_offset = op1a_essence_offset;
2378 if (!essence_offset)
2379 essence_offset = klv.offset;
2381 /* seek to footer, previous partition or stop */
2382 if (mxf_parse_handle_essence(mxf) <= 0)
2385 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2386 /* next partition pack - keep going, seek to previous partition or stop */
2387 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2389 else if (mxf->parsing_backward)
2391 /* we're still parsing forward. proceed to parsing this partition pack */
2394 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2395 if (IS_KLV_KEY(klv.key, metadata->key)) {
2396 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2400 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2404 if (!metadata->read)
2405 avio_skip(s->pb, klv.length);
2407 /* FIXME avoid seek */
2408 if (!essence_offset) {
2409 av_log(s, AV_LOG_ERROR, "no essence\n");
2410 return AVERROR_INVALIDDATA;
2412 avio_seek(s->pb, essence_offset, SEEK_SET);
2414 mxf_compute_essence_containers(mxf);
2416 /* we need to do this before computing the index tables
2417 * to be able to fill in zero IndexDurations with st->duration */
2418 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2421 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2424 if (mxf->nb_index_tables > 1) {
2425 /* TODO: look up which IndexSID to use via EssenceContainerData */
2426 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2427 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2428 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2429 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2430 ret = AVERROR_INVALIDDATA;
2434 mxf_handle_small_eubc(s);
2444 * Sets mxf->current_edit_unit based on what offset we're currently at.
2445 * @return next_ofs if OK, <0 on error
2447 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2449 int64_t last_ofs = -1, next_ofs = -1;
2450 MXFIndexTable *t = &mxf->index_tables[0];
2452 /* this is called from the OP1a demuxing logic, which means there
2453 * may be no index tables */
2454 if (mxf->nb_index_tables <= 0)
2457 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2458 while (mxf->current_edit_unit >= 0) {
2459 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2462 if (next_ofs <= last_ofs) {
2463 /* large next_ofs didn't change or current_edit_unit wrapped
2464 * around this fixes the infinite loop on zzuf3.mxf */
2465 av_log(mxf->fc, AV_LOG_ERROR,
2466 "next_ofs didn't change. not deriving packet timestamps\n");
2470 if (next_ofs > current_offset)
2473 last_ofs = next_ofs;
2474 mxf->current_edit_unit++;
2477 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2478 if (mxf->current_edit_unit < 0)
2484 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2485 uint64_t *sample_count)
2487 int i, total = 0, size = 0;
2488 AVStream *st = mxf->fc->streams[stream_index];
2489 MXFTrack *track = st->priv_data;
2490 AVRational time_base = av_inv_q(track->edit_rate);
2491 AVRational sample_rate = av_inv_q(st->time_base);
2492 const MXFSamplesPerFrame *spf = NULL;
2494 if ((sample_rate.num / sample_rate.den) == 48000)
2495 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2497 int remainder = (sample_rate.num * time_base.num) %
2498 (time_base.den * sample_rate.den);
2499 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2500 av_mul_q(sample_rate, time_base)));
2502 av_log(mxf->fc, AV_LOG_WARNING,
2503 "seeking detected on stream #%d with time base (%d/%d) and "
2504 "sample rate (%d/%d), audio pts won't be accurate.\n",
2505 stream_index, time_base.num, time_base.den,
2506 sample_rate.num, sample_rate.den);
2510 while (spf->samples_per_frame[size]) {
2511 total += spf->samples_per_frame[size];
2517 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2518 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2519 *sample_count += spf->samples_per_frame[i];
2525 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2528 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2529 int64_t bits_per_sample = codec->bits_per_coded_sample;
2531 if (!bits_per_sample)
2532 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2534 pkt->pts = track->sample_count;
2536 if ( codec->channels <= 0
2537 || bits_per_sample <= 0
2538 || codec->channels * (int64_t)bits_per_sample < 8)
2539 return AVERROR(EINVAL);
2540 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2544 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2547 MXFContext *mxf = s->priv_data;
2550 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2551 PRINT_KEY(s, "read packet", klv.key);
2552 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2553 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2554 ret = mxf_decrypt_triplet(s, pkt, &klv);
2556 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2561 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2562 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2563 int index = mxf_get_stream_index(s, &klv);
2564 int64_t next_ofs, next_klv;
2567 AVCodecContext *codec;
2570 av_log(s, AV_LOG_ERROR,
2571 "error getting stream index %"PRIu32"\n",
2572 AV_RB32(klv.key + 12));
2576 st = s->streams[index];
2577 track = st->priv_data;
2579 if (s->streams[index]->discard == AVDISCARD_ALL)
2582 next_klv = avio_tell(s->pb) + klv.length;
2583 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2585 if (next_ofs >= 0 && next_klv > next_ofs) {
2586 /* if this check is hit then it's possible OPAtom was treated as OP1a
2587 * truncate the packet since it's probably very large (>2 GiB is common) */
2588 avpriv_request_sample(s,
2589 "OPAtom misinterpreted as OP1a?"
2590 "KLV for edit unit %i extending into "
2592 mxf->current_edit_unit);
2593 klv.length = next_ofs - avio_tell(s->pb);
2596 /* check for 8 channels AES3 element */
2597 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2598 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2601 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2605 ret = av_get_packet(s->pb, pkt, klv.length);
2609 pkt->stream_index = index;
2610 pkt->pos = klv.offset;
2612 codec = s->streams[index]->codec;
2614 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2615 /* mxf->current_edit_unit good - see if we have an
2616 * index table to derive timestamps from */
2617 MXFIndexTable *t = &mxf->index_tables[0];
2619 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2620 pkt->dts = mxf->current_edit_unit + t->first_dts;
2621 pkt->pts = t->ptses[mxf->current_edit_unit];
2622 } else if (track->intra_only) {
2623 /* intra-only -> PTS = EditUnit.
2624 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2625 pkt->pts = mxf->current_edit_unit;
2627 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2628 ret = mxf_set_audio_pts(mxf, codec, pkt);
2633 /* seek for truncated packets */
2634 avio_seek(s->pb, next_klv, SEEK_SET);
2639 avio_skip(s->pb, klv.length);
2641 return avio_feof(s->pb) ? AVERROR_EOF : ret;
2644 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2646 MXFContext *mxf = s->priv_data;
2648 int64_t ret64, pos, next_pos;
2653 if (mxf->op != OPAtom)
2654 return mxf_read_packet_old(s, pkt);
2656 /* OPAtom - clip wrapped demuxing */
2657 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2659 t = &mxf->index_tables[0];
2661 if (mxf->current_edit_unit >= st->duration)
2664 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2666 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2669 /* compute size by finding the next edit unit or the end of the essence container
2670 * not pretty, but it works */
2671 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2672 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2673 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2674 return AVERROR_INVALIDDATA;
2677 if ((size = next_pos - pos) <= 0) {
2678 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2679 return AVERROR_INVALIDDATA;
2682 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2685 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2688 pkt->stream_index = 0;
2690 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2691 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2692 pkt->dts = mxf->current_edit_unit + t->first_dts;
2693 pkt->pts = t->ptses[mxf->current_edit_unit];
2694 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2695 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2700 mxf->current_edit_unit += edit_units;
2705 static int mxf_read_close(AVFormatContext *s)
2707 MXFContext *mxf = s->priv_data;
2708 MXFIndexTableSegment *seg;
2711 av_freep(&mxf->packages_refs);
2713 for (i = 0; i < s->nb_streams; i++)
2714 s->streams[i]->priv_data = NULL;
2716 for (i = 0; i < mxf->metadata_sets_count; i++) {
2717 switch (mxf->metadata_sets[i]->type) {
2719 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2721 case MultipleDescriptor:
2722 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2725 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2728 case MaterialPackage:
2729 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2730 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->name);
2732 case IndexTableSegment:
2733 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2734 av_freep(&seg->temporal_offset_entries);
2735 av_freep(&seg->flag_entries);
2736 av_freep(&seg->stream_offset_entries);
2741 av_freep(&mxf->metadata_sets[i]);
2743 av_freep(&mxf->partitions);
2744 av_freep(&mxf->metadata_sets);
2745 av_freep(&mxf->aesc);
2746 av_freep(&mxf->local_tags);
2748 if (mxf->index_tables) {
2749 for (i = 0; i < mxf->nb_index_tables; i++) {
2750 av_freep(&mxf->index_tables[i].segments);
2751 av_freep(&mxf->index_tables[i].ptses);
2752 av_freep(&mxf->index_tables[i].fake_index);
2755 av_freep(&mxf->index_tables);
2760 static int mxf_probe(AVProbeData *p) {
2761 const uint8_t *bufp = p->buf;
2762 const uint8_t *end = p->buf + p->buf_size;
2764 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2767 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2768 end -= sizeof(mxf_header_partition_pack_key);
2770 for (; bufp < end;) {
2771 if (!((bufp[13] - 1) & 0xF2)){
2772 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
2773 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
2774 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
2775 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
2776 return AVPROBE_SCORE_MAX;
2785 /* rudimentary byte seek */
2786 /* XXX: use MXF Index */
2787 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2789 AVStream *st = s->streams[stream_index];
2791 MXFContext* mxf = s->priv_data;
2795 MXFTrack *source_track = st->priv_data;
2797 /* if audio then truncate sample_time to EditRate */
2798 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2799 sample_time = av_rescale_q(sample_time, st->time_base,
2800 av_inv_q(source_track->edit_rate));
2802 if (mxf->nb_index_tables <= 0) {
2804 return AVERROR_INVALIDDATA;
2805 if (sample_time < 0)
2807 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2809 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2813 ff_update_cur_dts(s, st, sample_time);
2814 mxf->current_edit_unit = sample_time;
2816 t = &mxf->index_tables[0];
2818 /* clamp above zero, else ff_index_search_timestamp() returns negative
2819 * this also means we allow seeking before the start */
2820 sample_time = FFMAX(sample_time, 0);
2822 if (t->fake_index) {
2823 /* behave as if we have a proper index */
2824 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2827 /* no IndexEntryArray (one or more CBR segments)
2828 * make sure we don't seek past the end */
2829 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2832 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
2835 ff_update_cur_dts(s, st, sample_time);
2836 mxf->current_edit_unit = sample_time;
2837 avio_seek(s->pb, seekpos, SEEK_SET);
2840 // Update all tracks sample count
2841 for (i = 0; i < s->nb_streams; i++) {
2842 AVStream *cur_st = s->streams[i];
2843 MXFTrack *cur_track = cur_st->priv_data;
2844 uint64_t current_sample_count = 0;
2845 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2846 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2850 cur_track->sample_count = current_sample_count;
2856 AVInputFormat ff_mxf_demuxer = {
2858 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2859 .priv_data_size = sizeof(MXFContext),
2860 .read_probe = mxf_probe,
2861 .read_header = mxf_read_header,
2862 .read_packet = mxf_read_packet,
2863 .read_close = mxf_read_close,
2864 .read_seek = mxf_read_seek,