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;
96 enum MXFMetadataSetType type;
97 UID source_container_ul;
102 enum MXFMetadataSetType type;
103 UID source_package_uid;
104 UID data_definition_ul;
106 int64_t start_position;
108 } MXFStructuralComponent;
112 enum MXFMetadataSetType type;
113 UID data_definition_ul;
114 UID *structural_components_refs;
115 int structural_components_count;
121 enum MXFMetadataSetType type;
124 struct AVRational rate;
126 } MXFTimecodeComponent;
130 enum MXFMetadataSetType type;
131 MXFSequence *sequence; /* mandatory, and only one */
134 uint8_t track_number[4];
135 AVRational edit_rate;
137 uint64_t sample_count;
138 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
143 enum MXFMetadataSetType type;
144 UID essence_container_ul;
145 UID essence_codec_ul;
146 AVRational sample_rate;
147 AVRational aspect_ratio;
149 int height; /* Field height, not frame height */
150 int frame_layout; /* See MXFFrameLayout enum */
156 unsigned int component_depth;
157 unsigned int horiz_subsampling;
158 unsigned int vert_subsampling;
159 UID *sub_descriptors_refs;
160 int sub_descriptors_count;
164 enum AVPixelFormat pix_fmt;
169 enum MXFMetadataSetType type;
170 int edit_unit_byte_count;
173 AVRational index_edit_rate;
174 uint64_t index_start_position;
175 uint64_t index_duration;
176 int8_t *temporal_offset_entries;
178 uint64_t *stream_offset_entries;
179 int nb_index_entries;
180 } MXFIndexTableSegment;
184 enum MXFMetadataSetType type;
188 MXFDescriptor *descriptor; /* only one */
194 enum MXFMetadataSetType type;
197 /* decoded index table */
201 int nb_ptses; /* number of PTSes or total duration of index */
202 int64_t first_dts; /* DTS = EditUnit + first_dts */
203 int64_t *ptses; /* maps EditUnit -> PTS */
205 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
206 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
210 MXFPartition *partitions;
211 unsigned partitions_count;
215 MXFMetadataSet **metadata_sets;
216 int metadata_sets_count;
220 int local_tags_count;
221 uint64_t last_partition;
222 uint64_t footer_partition;
223 KLVPacket current_klv_data;
224 int current_klv_index;
226 MXFPartition *current_partition;
227 int parsing_backward;
228 int64_t last_forward_tell;
229 int last_forward_partition;
230 int current_edit_unit;
232 MXFIndexTable *index_tables;
233 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
236 enum MXFWrappingScheme {
241 /* NOTE: klv_offset is not set (-1) for local keys */
242 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
246 MXFMetadataReadFunc *read;
248 enum MXFMetadataSetType type;
249 } MXFMetadataReadTableEntry;
251 static int mxf_read_close(AVFormatContext *s);
253 /* partial keys to match */
254 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
255 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
256 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
257 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
258 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
259 /* complete keys to match */
260 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 };
261 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
262 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
263 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 };
264 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
266 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
268 static int64_t klv_decode_ber_length(AVIOContext *pb)
270 uint64_t size = avio_r8(pb);
271 if (size & 0x80) { /* long form */
272 int bytes_num = size & 0x7f;
273 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
275 return AVERROR_INVALIDDATA;
278 size = size << 8 | avio_r8(pb);
283 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
286 for (i = 0; i < size && !url_feof(pb); i++) {
290 else if (b != key[i])
296 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
298 if (!mxf_read_sync(pb, mxf_klv_key, 4))
299 return AVERROR_INVALIDDATA;
300 klv->offset = avio_tell(pb) - 4;
301 memcpy(klv->key, mxf_klv_key, 4);
302 avio_read(pb, klv->key + 4, 12);
303 klv->length = klv_decode_ber_length(pb);
304 return klv->length == -1 ? -1 : 0;
307 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
311 for (i = 0; i < s->nb_streams; i++) {
312 MXFTrack *track = s->streams[i]->priv_data;
314 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
317 /* return 0 if only one stream, for OP Atom files with 0 as track number */
318 return s->nb_streams == 1 ? 0 : -1;
321 /* XXX: use AVBitStreamFilter */
322 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
324 const uint8_t *buf_ptr, *end_ptr;
328 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
329 return AVERROR_INVALIDDATA;
330 length = av_get_packet(pb, pkt, length);
333 data_ptr = pkt->data;
334 end_ptr = pkt->data + length;
335 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
336 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
337 for (i = 0; i < st->codec->channels; i++) {
338 uint32_t sample = bytestream_get_le32(&buf_ptr);
339 if (st->codec->bits_per_coded_sample == 24)
340 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
342 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
344 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
346 av_shrink_packet(pkt, data_ptr - pkt->data);
350 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
352 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
353 MXFContext *mxf = s->priv_data;
354 AVIOContext *pb = s->pb;
355 int64_t end = avio_tell(pb) + klv->length;
358 uint64_t plaintext_size;
363 if (!mxf->aesc && s->key && s->keylen == 16) {
364 mxf->aesc = av_aes_alloc();
366 return AVERROR(ENOMEM);
367 av_aes_init(mxf->aesc, s->key, 128, 1);
370 avio_skip(pb, klv_decode_ber_length(pb));
372 klv_decode_ber_length(pb);
373 plaintext_size = avio_rb64(pb);
375 klv_decode_ber_length(pb);
376 avio_read(pb, klv->key, 16);
377 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
378 return AVERROR_INVALIDDATA;
379 index = mxf_get_stream_index(s, klv);
381 return AVERROR_INVALIDDATA;
383 klv_decode_ber_length(pb);
384 orig_size = avio_rb64(pb);
385 if (orig_size < plaintext_size)
386 return AVERROR_INVALIDDATA;
388 size = klv_decode_ber_length(pb);
389 if (size < 32 || size - 32 < orig_size)
390 return AVERROR_INVALIDDATA;
391 avio_read(pb, ivec, 16);
392 avio_read(pb, tmpbuf, 16);
394 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
395 if (memcmp(tmpbuf, checkv, 16))
396 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
398 size = av_get_packet(pb, pkt, size);
401 else if (size < plaintext_size)
402 return AVERROR_INVALIDDATA;
403 size -= plaintext_size;
405 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
406 &pkt->data[plaintext_size], size >> 4, ivec, 1);
407 av_shrink_packet(pkt, orig_size);
408 pkt->stream_index = index;
409 avio_skip(pb, end - avio_tell(pb));
413 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
415 MXFContext *mxf = arg;
416 int item_num = avio_rb32(pb);
417 int item_len = avio_rb32(pb);
419 if (item_len != 18) {
420 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
421 return AVERROR_PATCHWELCOME;
423 if (item_num > 65536) {
424 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
425 return AVERROR_INVALIDDATA;
427 mxf->local_tags = av_calloc(item_num, item_len);
428 if (!mxf->local_tags)
429 return AVERROR(ENOMEM);
430 mxf->local_tags_count = item_num;
431 avio_read(pb, mxf->local_tags, item_num*item_len);
435 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
437 MXFContext *mxf = arg;
438 MXFPartition *partition, *tmp_part;
440 uint64_t footer_partition;
441 uint32_t nb_essence_containers;
443 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
445 return AVERROR(ENOMEM);
446 mxf->partitions = tmp_part;
448 if (mxf->parsing_backward) {
449 /* insert the new partition pack in the middle
450 * this makes the entries in mxf->partitions sorted by offset */
451 memmove(&mxf->partitions[mxf->last_forward_partition+1],
452 &mxf->partitions[mxf->last_forward_partition],
453 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
454 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
456 mxf->last_forward_partition++;
457 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
460 memset(partition, 0, sizeof(*partition));
461 mxf->partitions_count++;
462 partition->pack_length = avio_tell(pb) - klv_offset + size;
466 partition->type = Header;
469 partition->type = BodyPartition;
472 partition->type = Footer;
475 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
476 return AVERROR_INVALIDDATA;
479 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
480 partition->closed = partition->type == Footer || !(uid[14] & 1);
481 partition->complete = uid[14] > 2;
483 partition->kag_size = avio_rb32(pb);
484 partition->this_partition = avio_rb64(pb);
485 partition->previous_partition = avio_rb64(pb);
486 footer_partition = avio_rb64(pb);
487 partition->header_byte_count = avio_rb64(pb);
488 partition->index_byte_count = avio_rb64(pb);
489 partition->index_sid = avio_rb32(pb);
491 partition->body_sid = avio_rb32(pb);
492 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
493 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
494 return AVERROR_INVALIDDATA;
496 nb_essence_containers = avio_rb32(pb);
498 /* some files don'thave FooterPartition set in every partition */
499 if (footer_partition) {
500 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
501 av_log(mxf->fc, AV_LOG_ERROR,
502 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
503 mxf->footer_partition, footer_partition);
505 mxf->footer_partition = footer_partition;
510 "PartitionPack: ThisPartition = 0x%"PRIX64
511 ", PreviousPartition = 0x%"PRIX64", "
512 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
513 partition->this_partition,
514 partition->previous_partition, footer_partition,
515 partition->index_sid, partition->body_sid);
517 /* sanity check PreviousPartition if set */
518 if (partition->previous_partition &&
519 mxf->run_in + partition->previous_partition >= klv_offset) {
520 av_log(mxf->fc, AV_LOG_ERROR,
521 "PreviousPartition points to this partition or forward\n");
522 return AVERROR_INVALIDDATA;
525 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
526 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
527 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
528 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
529 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
530 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
531 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
532 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
533 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
534 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
535 else if (op[12] == 0x10) {
536 /* SMPTE 390m: "There shall be exactly one essence container"
537 * The following block deals with files that violate this, namely:
538 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
539 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
540 if (nb_essence_containers != 1) {
541 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
545 av_log(mxf->fc, AV_LOG_WARNING,
546 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
547 nb_essence_containers,
548 op == OP1a ? "OP1a" : "OPAtom");
554 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
558 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
559 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
560 partition->kag_size);
562 if (mxf->op == OPSONYOpt)
563 partition->kag_size = 512;
565 partition->kag_size = 1;
567 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
573 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
575 MXFMetadataSet **tmp;
577 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
579 return AVERROR(ENOMEM);
580 mxf->metadata_sets = tmp;
581 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
582 mxf->metadata_sets_count++;
586 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
588 MXFCryptoContext *cryptocontext = arg;
590 return AVERROR_INVALIDDATA;
591 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
592 avio_read(pb, cryptocontext->source_container_ul, 16);
596 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
598 MXFContext *mxf = arg;
601 mxf->packages_count = avio_rb32(pb);
602 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
603 if (!mxf->packages_refs)
604 return AVERROR(ENOMEM);
605 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
606 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
612 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
614 MXFStructuralComponent *source_clip = arg;
617 source_clip->duration = avio_rb64(pb);
620 source_clip->start_position = avio_rb64(pb);
623 /* UMID, only get last 16 bytes */
625 avio_read(pb, source_clip->source_package_uid, 16);
628 source_clip->source_track_id = avio_rb32(pb);
634 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
636 MXFPackage *package = arg;
639 package->tracks_count = avio_rb32(pb);
640 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
641 if (!package->tracks_refs)
642 return AVERROR(ENOMEM);
643 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
644 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
650 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
652 MXFTimecodeComponent *mxf_timecode = arg;
655 mxf_timecode->start_frame = avio_rb64(pb);
658 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
661 mxf_timecode->drop_frame = avio_r8(pb);
667 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
669 MXFTrack *track = arg;
672 track->track_id = avio_rb32(pb);
675 avio_read(pb, track->track_number, 4);
678 track->edit_rate.num = avio_rb32(pb);
679 track->edit_rate.den = avio_rb32(pb);
682 avio_read(pb, track->sequence_ref, 16);
688 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
690 MXFSequence *sequence = arg;
693 sequence->duration = avio_rb64(pb);
696 avio_read(pb, sequence->data_definition_ul, 16);
699 sequence->structural_components_count = avio_rb32(pb);
700 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
701 if (!sequence->structural_components_refs)
702 return AVERROR(ENOMEM);
703 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
704 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
710 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
712 MXFPackage *package = arg;
715 package->tracks_count = avio_rb32(pb);
716 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
717 if (!package->tracks_refs)
718 return AVERROR(ENOMEM);
719 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
720 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
723 /* UMID, only get last 16 bytes */
725 avio_read(pb, package->package_uid, 16);
728 avio_read(pb, package->descriptor_ref, 16);
734 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
738 segment->nb_index_entries = avio_rb32(pb);
740 length = avio_rb32(pb);
742 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
743 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
744 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
745 return AVERROR(ENOMEM);
747 for (i = 0; i < segment->nb_index_entries; i++) {
748 segment->temporal_offset_entries[i] = avio_r8(pb);
749 avio_r8(pb); /* KeyFrameOffset */
750 segment->flag_entries[i] = avio_r8(pb);
751 segment->stream_offset_entries[i] = avio_rb64(pb);
752 avio_skip(pb, length - 11);
757 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
759 MXFIndexTableSegment *segment = arg;
762 segment->edit_unit_byte_count = avio_rb32(pb);
763 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
766 segment->index_sid = avio_rb32(pb);
767 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
770 segment->body_sid = avio_rb32(pb);
771 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
774 av_dlog(NULL, "IndexEntryArray found\n");
775 return mxf_read_index_entry_array(pb, segment);
777 segment->index_edit_rate.num = avio_rb32(pb);
778 segment->index_edit_rate.den = avio_rb32(pb);
779 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
780 segment->index_edit_rate.den);
783 segment->index_start_position = avio_rb64(pb);
784 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
787 segment->index_duration = avio_rb64(pb);
788 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
794 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
796 int code, value, ofs = 0;
797 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
802 av_dlog(NULL, "pixel layout: code %#x\n", code);
805 layout[ofs++] = code;
806 layout[ofs++] = value;
808 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
809 } while (code != 0); /* SMPTE 377M E.2.46 */
811 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
814 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
816 MXFDescriptor *descriptor = arg;
817 descriptor->pix_fmt = AV_PIX_FMT_NONE;
820 descriptor->sub_descriptors_count = avio_rb32(pb);
821 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
822 if (!descriptor->sub_descriptors_refs)
823 return AVERROR(ENOMEM);
824 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
825 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
828 avio_read(pb, descriptor->essence_container_ul, 16);
831 descriptor->linked_track_id = avio_rb32(pb);
833 case 0x3201: /* PictureEssenceCoding */
834 avio_read(pb, descriptor->essence_codec_ul, 16);
837 descriptor->width = avio_rb32(pb);
840 descriptor->height = avio_rb32(pb);
843 descriptor->frame_layout = avio_r8(pb);
846 descriptor->aspect_ratio.num = avio_rb32(pb);
847 descriptor->aspect_ratio.den = avio_rb32(pb);
850 descriptor->field_dominance = avio_r8(pb);
853 descriptor->component_depth = avio_rb32(pb);
856 descriptor->horiz_subsampling = avio_rb32(pb);
859 descriptor->vert_subsampling = avio_rb32(pb);
862 descriptor->sample_rate.num = avio_rb32(pb);
863 descriptor->sample_rate.den = avio_rb32(pb);
865 case 0x3D06: /* SoundEssenceCompression */
866 avio_read(pb, descriptor->essence_codec_ul, 16);
869 descriptor->channels = avio_rb32(pb);
872 descriptor->bits_per_sample = avio_rb32(pb);
875 mxf_read_pixel_layout(pb, descriptor);
878 /* Private uid used by SONY C0023S01.mxf */
879 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
880 if (descriptor->extradata)
881 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
882 av_free(descriptor->extradata);
883 descriptor->extradata_size = 0;
884 descriptor->extradata = av_malloc(size);
885 if (!descriptor->extradata)
886 return AVERROR(ENOMEM);
887 descriptor->extradata_size = size;
888 avio_read(pb, descriptor->extradata, size);
896 * Match an uid independently of the version byte and up to len common bytes
899 static int mxf_match_uid(const UID key, const UID uid, int len)
902 for (i = 0; i < len; i++) {
903 if (i != 7 && key[i] != uid[i])
909 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
911 while (uls->uid[0]) {
912 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
919 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
925 for (i = 0; i < mxf->metadata_sets_count; i++) {
926 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
927 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
928 return mxf->metadata_sets[i];
934 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
935 // video essence container uls
936 { { 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 */
937 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
938 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
939 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
942 /* EC ULs for intra-only formats */
943 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
944 { { 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 */
945 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
948 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
949 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
950 { { 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 */
951 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
952 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
955 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
956 // sound essence container uls
957 { { 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 */
958 { { 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 */
959 { { 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 */
960 { { 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 */
961 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
964 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
966 int i, j, nb_segments = 0;
967 MXFIndexTableSegment **unsorted_segments;
968 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
970 /* count number of segments, allocate arrays and copy unsorted segments */
971 for (i = 0; i < mxf->metadata_sets_count; i++)
972 if (mxf->metadata_sets[i]->type == IndexTableSegment)
976 return AVERROR_INVALIDDATA;
978 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
979 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
980 av_freep(sorted_segments);
981 av_free(unsorted_segments);
982 return AVERROR(ENOMEM);
985 for (i = j = 0; i < mxf->metadata_sets_count; i++)
986 if (mxf->metadata_sets[i]->type == IndexTableSegment)
987 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
989 *nb_sorted_segments = 0;
991 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
992 for (i = 0; i < nb_segments; i++) {
993 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
994 uint64_t best_index_duration = 0;
996 for (j = 0; j < nb_segments; j++) {
997 MXFIndexTableSegment *s = unsorted_segments[j];
999 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1000 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1001 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1003 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1004 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1005 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1007 best_body_sid = s->body_sid;
1008 best_index_sid = s->index_sid;
1009 best_index_start = s->index_start_position;
1010 best_index_duration = s->index_duration;
1014 /* no suitable entry found -> we're done */
1018 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1019 last_body_sid = best_body_sid;
1020 last_index_sid = best_index_sid;
1021 last_index_start = best_index_start;
1024 av_free(unsorted_segments);
1030 * Computes the absolute file offset of the given essence container offset
1032 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1035 int64_t offset_in = offset; /* for logging */
1037 for (x = 0; x < mxf->partitions_count; x++) {
1038 MXFPartition *p = &mxf->partitions[x];
1040 if (p->body_sid != body_sid)
1043 if (offset < p->essence_length || !p->essence_length) {
1044 *offset_out = p->essence_offset + offset;
1048 offset -= p->essence_length;
1051 av_log(mxf->fc, AV_LOG_ERROR,
1052 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1053 offset_in, body_sid);
1055 return AVERROR_INVALIDDATA;
1059 * Returns the end position of the essence container with given BodySID, or zero if unknown
1061 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1066 for (x = 0; x < mxf->partitions_count; x++) {
1067 MXFPartition *p = &mxf->partitions[x];
1069 if (p->body_sid != body_sid)
1072 if (!p->essence_length)
1075 ret = p->essence_offset + p->essence_length;
1081 /* EditUnit -> absolute offset */
1082 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)
1085 int64_t offset_temp = 0;
1087 for (i = 0; i < index_table->nb_segments; i++) {
1088 MXFIndexTableSegment *s = index_table->segments[i];
1090 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1092 if (edit_unit < s->index_start_position + s->index_duration) {
1093 int64_t index = edit_unit - s->index_start_position;
1095 if (s->edit_unit_byte_count)
1096 offset_temp += s->edit_unit_byte_count * index;
1097 else if (s->nb_index_entries) {
1098 if (s->nb_index_entries == 2 * s->index_duration + 1)
1099 index *= 2; /* Avid index */
1101 if (index < 0 || index >= s->nb_index_entries) {
1102 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1103 index_table->index_sid, s->index_start_position);
1104 return AVERROR_INVALIDDATA;
1107 offset_temp = s->stream_offset_entries[index];
1109 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1110 index_table->index_sid, s->index_start_position);
1111 return AVERROR_INVALIDDATA;
1115 *edit_unit_out = edit_unit;
1117 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1119 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1120 offset_temp += s->edit_unit_byte_count * s->index_duration;
1125 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);
1127 return AVERROR_INVALIDDATA;
1130 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1133 int8_t max_temporal_offset = -128;
1135 /* first compute how many entries we have */
1136 for (i = 0; i < index_table->nb_segments; i++) {
1137 MXFIndexTableSegment *s = index_table->segments[i];
1139 if (!s->nb_index_entries) {
1140 index_table->nb_ptses = 0;
1141 return 0; /* no TemporalOffsets */
1144 index_table->nb_ptses += s->index_duration;
1147 /* paranoid check */
1148 if (index_table->nb_ptses <= 0)
1151 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1152 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1153 av_freep(&index_table->ptses);
1154 return AVERROR(ENOMEM);
1157 /* we may have a few bad TemporalOffsets
1158 * make sure the corresponding PTSes don't have the bogus value 0 */
1159 for (x = 0; x < index_table->nb_ptses; x++)
1160 index_table->ptses[x] = AV_NOPTS_VALUE;
1174 * We want to transform it into this:
1185 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1186 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1187 * The latter makes DTS <= PTS.
1189 for (i = x = 0; i < index_table->nb_segments; i++) {
1190 MXFIndexTableSegment *s = index_table->segments[i];
1191 int index_delta = 1;
1192 int n = s->nb_index_entries;
1194 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1195 index_delta = 2; /* Avid index */
1196 /* ignore the last entry - it's the size of the essence container */
1200 for (j = 0; j < n; j += index_delta, x++) {
1201 int offset = s->temporal_offset_entries[j] / index_delta;
1202 int index = x + offset;
1204 if (x >= index_table->nb_ptses) {
1205 av_log(mxf->fc, AV_LOG_ERROR,
1206 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1207 s->nb_index_entries, s->index_duration);
1211 index_table->fake_index[x].timestamp = x;
1212 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1214 if (index < 0 || index >= index_table->nb_ptses) {
1215 av_log(mxf->fc, AV_LOG_ERROR,
1216 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1221 index_table->ptses[index] = x;
1222 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1226 index_table->first_dts = -max_temporal_offset;
1232 * Sorts and collects index table segments into index tables.
1233 * Also computes PTSes if possible.
1235 static int mxf_compute_index_tables(MXFContext *mxf)
1237 int i, j, k, ret, nb_sorted_segments;
1238 MXFIndexTableSegment **sorted_segments = NULL;
1240 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1241 nb_sorted_segments <= 0) {
1242 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1246 /* sanity check and count unique BodySIDs/IndexSIDs */
1247 for (i = 0; i < nb_sorted_segments; i++) {
1248 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1249 mxf->nb_index_tables++;
1250 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1251 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1252 ret = AVERROR_INVALIDDATA;
1253 goto finish_decoding_index;
1257 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1258 sizeof(*mxf->index_tables));
1259 if (!mxf->index_tables) {
1260 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1261 ret = AVERROR(ENOMEM);
1262 goto finish_decoding_index;
1265 /* distribute sorted segments to index tables */
1266 for (i = j = 0; i < nb_sorted_segments; i++) {
1267 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1272 mxf->index_tables[j].nb_segments++;
1275 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1276 MXFIndexTable *t = &mxf->index_tables[j];
1278 t->segments = av_mallocz_array(t->nb_segments,
1279 sizeof(*t->segments));
1282 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1283 " pointer array\n");
1284 ret = AVERROR(ENOMEM);
1285 goto finish_decoding_index;
1288 if (sorted_segments[i]->index_start_position)
1289 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1290 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1292 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1293 t->index_sid = sorted_segments[i]->index_sid;
1294 t->body_sid = sorted_segments[i]->body_sid;
1296 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1297 goto finish_decoding_index;
1299 /* fix zero IndexDurations */
1300 for (k = 0; k < t->nb_segments; k++) {
1301 if (t->segments[k]->index_duration)
1304 if (t->nb_segments > 1)
1305 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1308 if (mxf->fc->nb_streams <= 0) {
1309 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1313 /* assume the first stream's duration is reasonable
1314 * leave index_duration = 0 on further segments in case we have any (unlikely)
1316 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1322 finish_decoding_index:
1323 av_free(sorted_segments);
1327 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1329 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1330 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1331 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1332 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1335 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1337 char buf[AV_TIMECODE_STR_SIZE];
1338 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1343 static int mxf_parse_structural_metadata(MXFContext *mxf)
1345 MXFPackage *material_package = NULL;
1346 MXFPackage *temp_package = NULL;
1349 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1350 /* TODO: handle multiple material packages (OP3x) */
1351 for (i = 0; i < mxf->packages_count; i++) {
1352 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1353 if (material_package) break;
1355 if (!material_package) {
1356 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1357 return AVERROR_INVALIDDATA;
1360 for (i = 0; i < material_package->tracks_count; i++) {
1361 MXFPackage *source_package = NULL;
1362 MXFTrack *material_track = NULL;
1363 MXFTrack *source_track = NULL;
1364 MXFTrack *temp_track = NULL;
1365 MXFDescriptor *descriptor = NULL;
1366 MXFStructuralComponent *component = NULL;
1367 MXFTimecodeComponent *mxf_tc = NULL;
1368 UID *essence_container_ul = NULL;
1369 const MXFCodecUL *codec_ul = NULL;
1370 const MXFCodecUL *container_ul = NULL;
1371 const MXFCodecUL *pix_fmt_ul = NULL;
1376 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1377 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1381 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1382 mxf_tc = (MXFTimecodeComponent*)component;
1383 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1384 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1385 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1389 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1390 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1394 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1395 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1399 mxf_tc = (MXFTimecodeComponent*)component;
1400 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1401 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1402 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1407 /* TODO: handle multiple source clips */
1408 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1409 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1413 for (k = 0; k < mxf->packages_count; k++) {
1414 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1417 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1418 source_package = temp_package;
1422 if (!source_package) {
1423 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1426 for (k = 0; k < source_package->tracks_count; k++) {
1427 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1428 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1429 ret = AVERROR_INVALIDDATA;
1432 if (temp_track->track_id == component->source_track_id) {
1433 source_track = temp_track;
1437 if (!source_track) {
1438 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1442 if (!source_track || !component)
1445 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1446 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1447 ret = AVERROR_INVALIDDATA;
1451 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1452 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1453 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1454 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1458 st = avformat_new_stream(mxf->fc, NULL);
1460 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1461 ret = AVERROR(ENOMEM);
1464 st->id = source_track->track_id;
1465 st->priv_data = source_track;
1466 source_track->original_duration = st->duration = component->duration;
1467 if (st->duration == -1)
1468 st->duration = AV_NOPTS_VALUE;
1469 st->start_time = component->start_position;
1470 if (material_track->edit_rate.num <= 0 ||
1471 material_track->edit_rate.den <= 0) {
1472 av_log(mxf->fc, AV_LOG_WARNING,
1473 "Invalid edit rate (%d/%d) found on stream #%d, "
1474 "defaulting to 25/1\n",
1475 material_track->edit_rate.num,
1476 material_track->edit_rate.den, st->index);
1477 material_track->edit_rate = (AVRational){25, 1};
1479 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1481 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1482 * the former is accessible via st->priv_data */
1483 source_track->edit_rate = material_track->edit_rate;
1485 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1486 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1487 st->codec->codec_type = codec_ul->id;
1489 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1490 if (source_package->descriptor) {
1491 if (source_package->descriptor->type == MultipleDescriptor) {
1492 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1493 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1495 if (!sub_descriptor) {
1496 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1499 if (sub_descriptor->linked_track_id == source_track->track_id) {
1500 descriptor = sub_descriptor;
1504 } else if (source_package->descriptor->type == Descriptor)
1505 descriptor = source_package->descriptor;
1508 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1511 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1512 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1513 essence_container_ul = &descriptor->essence_container_ul;
1514 /* HACK: replacing the original key with mxf_encrypted_essence_container
1515 * is not allowed according to s429-6, try to find correct information anyway */
1516 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1517 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1518 for (k = 0; k < mxf->metadata_sets_count; k++) {
1519 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1520 if (metadata->type == CryptoContext) {
1521 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1527 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1528 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1529 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1530 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1531 avcodec_get_name(st->codec->codec_id));
1532 for (k = 0; k < 16; k++) {
1533 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1534 descriptor->essence_codec_ul[k]);
1535 if (!(k+1 & 19) || k == 5)
1536 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1538 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1540 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1541 source_track->intra_only = mxf_is_intra_only(descriptor);
1542 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1543 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1544 st->codec->codec_id = container_ul->id;
1545 st->codec->width = descriptor->width;
1546 st->codec->height = descriptor->height; /* Field height, not frame height */
1547 switch (descriptor->frame_layout) {
1548 case SegmentedFrame:
1549 /* This one is a weird layout I don't fully understand. */
1550 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1553 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1556 /* Every other line is stored and needs to be duplicated. */
1557 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1558 break; /* The correct thing to do here is fall through, but by breaking we might be
1559 able to decode some streams at half the vertical resolution, rather than not al all.
1560 It's also for compatibility with the old behavior. */
1563 case SeparateFields:
1564 switch (descriptor->field_dominance) {
1566 st->codec->field_order = AV_FIELD_TT;
1569 st->codec->field_order = AV_FIELD_BB;
1572 avpriv_request_sample(mxf->fc,
1573 "Field dominance %d support",
1574 descriptor->field_dominance);
1577 /* Turn field height into frame height. */
1578 st->codec->height *= 2;
1581 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1583 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1584 st->codec->pix_fmt = descriptor->pix_fmt;
1585 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1586 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1587 &descriptor->essence_codec_ul);
1588 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1589 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1590 /* support files created before RP224v10 by defaulting to UYVY422
1591 if subsampling is 4:2:2 and component depth is 8-bit */
1592 if (descriptor->horiz_subsampling == 2 &&
1593 descriptor->vert_subsampling == 1 &&
1594 descriptor->component_depth == 8) {
1595 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1600 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1601 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1602 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1603 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1604 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))
1605 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1606 st->codec->channels = descriptor->channels;
1607 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1609 if (descriptor->sample_rate.den > 0) {
1610 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1611 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1613 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1614 "found for stream #%d, time base forced to 1/48000\n",
1615 descriptor->sample_rate.num, descriptor->sample_rate.den,
1617 avpriv_set_pts_info(st, 64, 1, 48000);
1620 /* if duration is set, rescale it from EditRate to SampleRate */
1621 if (st->duration != AV_NOPTS_VALUE)
1622 st->duration = av_rescale_q(st->duration,
1623 av_inv_q(material_track->edit_rate),
1626 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1627 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1628 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1629 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1630 else if (descriptor->bits_per_sample == 32)
1631 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1632 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1633 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1634 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1635 else if (descriptor->bits_per_sample == 32)
1636 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1637 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1638 st->need_parsing = AVSTREAM_PARSE_FULL;
1641 if (descriptor->extradata) {
1642 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1643 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1645 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1646 ret = ff_generate_avci_extradata(st);
1650 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1651 /* TODO: decode timestamps */
1652 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1661 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1667 return AVERROR(EINVAL);
1669 buf_size = size + size / 2 + 1;
1670 *str = av_malloc(buf_size);
1672 return AVERROR(ENOMEM);
1674 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1682 static int mxf_uid_to_str(UID uid, char **str)
1686 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1688 return AVERROR(ENOMEM);
1689 for (i = 0; i < sizeof(UID); i++) {
1690 snprintf(p, 2 + 1, "%.2x", uid[i]);
1692 if (i == 3 || i == 5 || i == 7 || i == 9) {
1693 snprintf(p, 1 + 1, "-");
1700 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1702 struct tm time = { 0 };
1703 time.tm_year = (timestamp >> 48) - 1900;
1704 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1705 time.tm_mday = (timestamp >> 32 & 0xFF);
1706 time.tm_hour = (timestamp >> 24 & 0xFF);
1707 time.tm_min = (timestamp >> 16 & 0xFF);
1708 time.tm_sec = (timestamp >> 8 & 0xFF);
1710 /* msvcrt versions of strftime calls the invalid parameter handler
1711 * (aborting the process if one isn't set) if the parameters are out
1713 time.tm_mon = av_clip(time.tm_mon, 0, 11);
1714 time.tm_mday = av_clip(time.tm_mday, 1, 31);
1715 time.tm_hour = av_clip(time.tm_hour, 0, 23);
1716 time.tm_min = av_clip(time.tm_min, 0, 59);
1717 time.tm_sec = av_clip(time.tm_sec, 0, 59);
1719 *str = av_mallocz(32);
1721 return AVERROR(ENOMEM);
1722 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1727 #define SET_STR_METADATA(pb, name, str) do { \
1728 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1730 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1733 #define SET_UID_METADATA(pb, name, var, str) do { \
1734 avio_read(pb, var, 16); \
1735 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1737 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1740 #define SET_TS_METADATA(pb, name, var, str) do { \
1741 var = avio_rb64(pb); \
1742 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1744 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1747 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1749 MXFContext *mxf = arg;
1750 AVFormatContext *s = mxf->fc;
1757 SET_STR_METADATA(pb, "company_name", str);
1760 SET_STR_METADATA(pb, "product_name", str);
1763 SET_STR_METADATA(pb, "product_version", str);
1766 SET_UID_METADATA(pb, "product_uid", uid, str);
1769 SET_TS_METADATA(pb, "modification_date", ts, str);
1772 SET_STR_METADATA(pb, "application_platform", str);
1775 SET_UID_METADATA(pb, "generation_uid", uid, str);
1778 SET_UID_METADATA(pb, "uid", uid, str);
1784 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1785 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1786 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1787 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1788 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1789 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1790 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1791 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1792 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1793 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1794 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1795 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1796 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1797 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1798 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1799 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1800 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1801 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1802 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1803 { { 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 */
1804 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1805 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1806 { { 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 */
1807 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1808 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1809 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1810 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1811 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1812 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1813 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1814 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1817 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1819 AVIOContext *pb = mxf->fc->pb;
1820 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1821 uint64_t klv_end = avio_tell(pb) + klv->length;
1824 return AVERROR(ENOMEM);
1825 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1827 int tag = avio_rb16(pb);
1828 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1829 uint64_t next = avio_tell(pb) + size;
1832 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1833 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1834 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1837 if (tag > 0x7FFF) { /* dynamic tag */
1839 for (i = 0; i < mxf->local_tags_count; i++) {
1840 int local_tag = AV_RB16(mxf->local_tags+i*18);
1841 if (local_tag == tag) {
1842 memcpy(uid, mxf->local_tags+i*18+2, 16);
1843 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1844 PRINT_KEY(mxf->fc, "uid", uid);
1848 if (ctx_size && tag == 0x3C0A)
1849 avio_read(pb, ctx->uid, 16);
1850 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1853 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1854 * it extending past the end of the KLV though (zzuf5.mxf). */
1855 if (avio_tell(pb) > klv_end) {
1859 av_log(mxf->fc, AV_LOG_ERROR,
1860 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1862 return AVERROR_INVALIDDATA;
1863 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1864 avio_seek(pb, next, SEEK_SET);
1866 if (ctx_size) ctx->type = type;
1867 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1871 * Seeks to the previous partition, if possible
1872 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1874 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1876 AVIOContext *pb = mxf->fc->pb;
1878 if (!mxf->current_partition ||
1879 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1880 return 0; /* we've parsed all partitions */
1882 /* seek to previous partition */
1883 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1884 mxf->current_partition = NULL;
1886 av_dlog(mxf->fc, "seeking to previous partition\n");
1892 * Called when essence is encountered
1893 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1895 static int mxf_parse_handle_essence(MXFContext *mxf)
1897 AVIOContext *pb = mxf->fc->pb;
1900 if (mxf->parsing_backward) {
1901 return mxf_seek_to_previous_partition(mxf);
1903 uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1904 : mxf->last_partition;
1907 av_dlog(mxf->fc, "no last partition\n");
1911 av_dlog(mxf->fc, "seeking to last partition\n");
1913 /* remember where we were so we don't end up seeking further back than this */
1914 mxf->last_forward_tell = avio_tell(pb);
1916 if (!pb->seekable) {
1917 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1921 /* seek to last partition and parse backward */
1922 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1923 av_log(mxf->fc, AV_LOG_ERROR,
1924 "failed to seek to last partition @ 0x%" PRIx64
1925 " (%"PRId64") - partial file?\n",
1926 mxf->run_in + offset, ret);
1930 mxf->current_partition = NULL;
1931 mxf->parsing_backward = 1;
1938 * Called when the next partition or EOF is encountered
1939 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1941 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1943 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1947 * Figures out the proper offset and length of the essence container in each partition
1949 static void mxf_compute_essence_containers(MXFContext *mxf)
1953 /* everything is already correct */
1954 if (mxf->op == OPAtom)
1957 for (x = 0; x < mxf->partitions_count; x++) {
1958 MXFPartition *p = &mxf->partitions[x];
1961 continue; /* BodySID == 0 -> no essence */
1963 if (x >= mxf->partitions_count - 1)
1964 break; /* last partition - can't compute length (and we don't need to) */
1966 /* essence container spans to the next partition */
1967 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1969 if (p->essence_length < 0) {
1970 /* next ThisPartition < essence_offset */
1971 p->essence_length = 0;
1972 av_log(mxf->fc, AV_LOG_ERROR,
1973 "partition %i: bad ThisPartition = %"PRIX64"\n",
1974 x+1, mxf->partitions[x+1].this_partition);
1979 static int64_t round_to_kag(int64_t position, int kag_size)
1981 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1982 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1983 int64_t ret = (position / kag_size) * kag_size;
1984 return ret == position ? ret : ret + kag_size;
1987 static int is_pcm(enum AVCodecID codec_id)
1989 /* we only care about "normal" PCM codecs until we get samples */
1990 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1994 * Deal with the case where for some audio atoms EditUnitByteCount is
1995 * very small (2, 4..). In those cases we should read more than one
1996 * sample per call to mxf_read_packet().
1998 static void mxf_handle_small_eubc(AVFormatContext *s)
2000 MXFContext *mxf = s->priv_data;
2002 /* assuming non-OPAtom == frame wrapped
2003 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2004 if (mxf->op != OPAtom)
2007 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2008 if (s->nb_streams != 1 ||
2009 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2010 !is_pcm(s->streams[0]->codec->codec_id) ||
2011 mxf->nb_index_tables != 1 ||
2012 mxf->index_tables[0].nb_segments != 1 ||
2013 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2016 /* arbitrarily default to 48 kHz PAL audio frame size */
2017 /* TODO: We could compute this from the ratio between the audio
2018 * and video edit rates for 48 kHz NTSC we could use the
2019 * 1802-1802-1802-1802-1801 pattern. */
2020 mxf->edit_units_per_packet = 1920;
2023 static void mxf_read_random_index_pack(AVFormatContext *s)
2025 MXFContext *mxf = s->priv_data;
2030 if (!s->pb->seekable)
2033 file_size = avio_size(s->pb);
2034 avio_seek(s->pb, file_size - 4, SEEK_SET);
2035 length = avio_rb32(s->pb);
2036 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2038 avio_seek(s->pb, file_size - length, SEEK_SET);
2039 if (klv_read_packet(&klv, s->pb) < 0 ||
2040 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2041 klv.length != length - 20)
2044 avio_skip(s->pb, klv.length - 12);
2045 mxf->last_partition = avio_rb64(s->pb);
2048 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2051 static int mxf_read_header(AVFormatContext *s)
2053 MXFContext *mxf = s->priv_data;
2055 int64_t essence_offset = 0;
2056 int64_t last_pos = -1;
2057 uint64_t last_pos_index = 1;
2060 mxf->last_forward_tell = INT64_MAX;
2061 mxf->edit_units_per_packet = 1;
2063 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2064 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2065 return AVERROR_INVALIDDATA;
2067 avio_seek(s->pb, -14, SEEK_CUR);
2069 mxf->run_in = avio_tell(s->pb);
2071 mxf_read_random_index_pack(s);
2073 while (!url_feof(s->pb)) {
2074 const MXFMetadataReadTableEntry *metadata;
2075 if (avio_tell(s->pb) == last_pos) {
2076 av_log(mxf->fc, AV_LOG_ERROR, "MXF structure loop detected\n");
2077 return AVERROR_INVALIDDATA;
2079 if ((1ULL<<61) % last_pos_index++ == 0)
2080 last_pos = avio_tell(s->pb);
2081 if (klv_read_packet(&klv, s->pb) < 0) {
2082 /* EOF - seek to previous partition or stop */
2083 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2089 PRINT_KEY(s, "read header", klv.key);
2090 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2091 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2092 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2093 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2094 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2096 if (!mxf->current_partition) {
2097 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2098 return AVERROR_INVALIDDATA;
2101 if (!mxf->current_partition->essence_offset) {
2102 /* for OP1a we compute essence_offset
2103 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2104 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2105 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2107 int64_t op1a_essence_offset =
2108 round_to_kag(mxf->current_partition->this_partition +
2109 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2110 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2111 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2113 if (mxf->op == OPAtom) {
2114 /* point essence_offset to the actual data
2115 * OPAtom has all the essence in one big KLV
2117 mxf->current_partition->essence_offset = avio_tell(s->pb);
2118 mxf->current_partition->essence_length = klv.length;
2120 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2121 mxf->current_partition->essence_offset = op1a_essence_offset;
2125 if (!essence_offset)
2126 essence_offset = klv.offset;
2128 /* seek to footer, previous partition or stop */
2129 if (mxf_parse_handle_essence(mxf) <= 0)
2132 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2133 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2134 /* next partition pack - keep going, seek to previous partition or stop */
2135 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2137 else if (mxf->parsing_backward)
2139 /* we're still parsing forward. proceed to parsing this partition pack */
2142 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2143 if (IS_KLV_KEY(klv.key, metadata->key)) {
2145 if (klv.key[5] == 0x53) {
2146 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2148 uint64_t next = avio_tell(s->pb) + klv.length;
2149 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2151 /* only seek forward, else this can loop for a long time */
2152 if (avio_tell(s->pb) > next) {
2153 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2155 return AVERROR_INVALIDDATA;
2158 avio_seek(s->pb, next, SEEK_SET);
2161 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2167 if (!metadata->read)
2168 avio_skip(s->pb, klv.length);
2170 /* FIXME avoid seek */
2171 if (!essence_offset) {
2172 av_log(s, AV_LOG_ERROR, "no essence\n");
2173 return AVERROR_INVALIDDATA;
2175 avio_seek(s->pb, essence_offset, SEEK_SET);
2177 mxf_compute_essence_containers(mxf);
2179 /* we need to do this before computing the index tables
2180 * to be able to fill in zero IndexDurations with st->duration */
2181 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2184 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2187 if (mxf->nb_index_tables > 1) {
2188 /* TODO: look up which IndexSID to use via EssenceContainerData */
2189 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2190 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2191 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2192 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2193 ret = AVERROR_INVALIDDATA;
2197 mxf_handle_small_eubc(s);
2207 * Sets mxf->current_edit_unit based on what offset we're currently at.
2208 * @return next_ofs if OK, <0 on error
2210 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2212 int64_t last_ofs = -1, next_ofs = -1;
2213 MXFIndexTable *t = &mxf->index_tables[0];
2215 /* this is called from the OP1a demuxing logic, which means there
2216 * may be no index tables */
2217 if (mxf->nb_index_tables <= 0)
2220 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2221 while (mxf->current_edit_unit >= 0) {
2222 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2225 if (next_ofs <= last_ofs) {
2226 /* large next_ofs didn't change or current_edit_unit wrapped
2227 * around this fixes the infinite loop on zzuf3.mxf */
2228 av_log(mxf->fc, AV_LOG_ERROR,
2229 "next_ofs didn't change. not deriving packet timestamps\n");
2233 if (next_ofs > current_offset)
2236 last_ofs = next_ofs;
2237 mxf->current_edit_unit++;
2240 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2241 if (mxf->current_edit_unit < 0)
2247 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2248 uint64_t *sample_count)
2250 int i, total = 0, size = 0;
2251 AVStream *st = mxf->fc->streams[stream_index];
2252 MXFTrack *track = st->priv_data;
2253 AVRational time_base = av_inv_q(track->edit_rate);
2254 AVRational sample_rate = av_inv_q(st->time_base);
2255 const MXFSamplesPerFrame *spf = NULL;
2257 if ((sample_rate.num / sample_rate.den) == 48000)
2258 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2260 int remainder = (sample_rate.num * time_base.num) %
2261 (time_base.den * sample_rate.den);
2262 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2263 av_mul_q(sample_rate, time_base)));
2265 av_log(mxf->fc, AV_LOG_WARNING,
2266 "seeking detected on stream #%d with time base (%d/%d) and "
2267 "sample rate (%d/%d), audio pts won't be accurate.\n",
2268 stream_index, time_base.num, time_base.den,
2269 sample_rate.num, sample_rate.den);
2273 while (spf->samples_per_frame[size]) {
2274 total += spf->samples_per_frame[size];
2280 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2281 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2282 *sample_count += spf->samples_per_frame[i];
2288 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2291 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2292 int64_t bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2294 pkt->pts = track->sample_count;
2296 if ( codec->channels <= 0
2297 || bits_per_sample <= 0
2298 || codec->channels * (int64_t)bits_per_sample < 8)
2299 return AVERROR(EINVAL);
2300 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2304 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2307 MXFContext *mxf = s->priv_data;
2310 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2311 PRINT_KEY(s, "read packet", klv.key);
2312 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2313 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2314 ret = mxf_decrypt_triplet(s, pkt, &klv);
2316 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2321 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2322 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2323 int index = mxf_get_stream_index(s, &klv);
2324 int64_t next_ofs, next_klv;
2327 AVCodecContext *codec;
2330 av_log(s, AV_LOG_ERROR,
2331 "error getting stream index %"PRIu32"\n",
2332 AV_RB32(klv.key + 12));
2336 st = s->streams[index];
2337 track = st->priv_data;
2339 if (s->streams[index]->discard == AVDISCARD_ALL)
2342 next_klv = avio_tell(s->pb) + klv.length;
2343 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2345 if (next_ofs >= 0 && next_klv > next_ofs) {
2346 /* if this check is hit then it's possible OPAtom was treated as OP1a
2347 * truncate the packet since it's probably very large (>2 GiB is common) */
2348 avpriv_request_sample(s,
2349 "OPAtom misinterpreted as OP1a?"
2350 "KLV for edit unit %i extending into "
2352 mxf->current_edit_unit);
2353 klv.length = next_ofs - avio_tell(s->pb);
2356 /* check for 8 channels AES3 element */
2357 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2358 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2361 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2365 ret = av_get_packet(s->pb, pkt, klv.length);
2369 pkt->stream_index = index;
2370 pkt->pos = klv.offset;
2372 codec = s->streams[index]->codec;
2374 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2375 /* mxf->current_edit_unit good - see if we have an
2376 * index table to derive timestamps from */
2377 MXFIndexTable *t = &mxf->index_tables[0];
2379 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2380 pkt->dts = mxf->current_edit_unit + t->first_dts;
2381 pkt->pts = t->ptses[mxf->current_edit_unit];
2382 } else if (track->intra_only) {
2383 /* intra-only -> PTS = EditUnit.
2384 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2385 pkt->pts = mxf->current_edit_unit;
2387 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2388 ret = mxf_set_audio_pts(mxf, codec, pkt);
2393 /* seek for truncated packets */
2394 avio_seek(s->pb, next_klv, SEEK_SET);
2399 avio_skip(s->pb, klv.length);
2401 return url_feof(s->pb) ? AVERROR_EOF : ret;
2404 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2406 MXFContext *mxf = s->priv_data;
2408 int64_t ret64, pos, next_pos;
2413 if (mxf->op != OPAtom)
2414 return mxf_read_packet_old(s, pkt);
2416 /* OPAtom - clip wrapped demuxing */
2417 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2419 t = &mxf->index_tables[0];
2421 if (mxf->current_edit_unit >= st->duration)
2424 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2426 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2429 /* compute size by finding the next edit unit or the end of the essence container
2430 * not pretty, but it works */
2431 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2432 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2433 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2434 return AVERROR_INVALIDDATA;
2437 if ((size = next_pos - pos) <= 0) {
2438 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2439 return AVERROR_INVALIDDATA;
2442 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2445 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2448 pkt->stream_index = 0;
2450 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2451 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2452 pkt->dts = mxf->current_edit_unit + t->first_dts;
2453 pkt->pts = t->ptses[mxf->current_edit_unit];
2454 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2455 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2460 mxf->current_edit_unit += edit_units;
2465 static int mxf_read_close(AVFormatContext *s)
2467 MXFContext *mxf = s->priv_data;
2468 MXFIndexTableSegment *seg;
2471 av_freep(&mxf->packages_refs);
2473 for (i = 0; i < s->nb_streams; i++)
2474 s->streams[i]->priv_data = NULL;
2476 for (i = 0; i < mxf->metadata_sets_count; i++) {
2477 switch (mxf->metadata_sets[i]->type) {
2479 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2481 case MultipleDescriptor:
2482 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2485 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2488 case MaterialPackage:
2489 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2491 case IndexTableSegment:
2492 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2493 av_freep(&seg->temporal_offset_entries);
2494 av_freep(&seg->flag_entries);
2495 av_freep(&seg->stream_offset_entries);
2500 av_freep(&mxf->metadata_sets[i]);
2502 av_freep(&mxf->partitions);
2503 av_freep(&mxf->metadata_sets);
2504 av_freep(&mxf->aesc);
2505 av_freep(&mxf->local_tags);
2507 if (mxf->index_tables) {
2508 for (i = 0; i < mxf->nb_index_tables; i++) {
2509 av_freep(&mxf->index_tables[i].segments);
2510 av_freep(&mxf->index_tables[i].ptses);
2511 av_freep(&mxf->index_tables[i].fake_index);
2514 av_freep(&mxf->index_tables);
2519 static int mxf_probe(AVProbeData *p) {
2520 const uint8_t *bufp = p->buf;
2521 const uint8_t *end = p->buf + p->buf_size;
2523 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2526 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2527 end -= sizeof(mxf_header_partition_pack_key);
2529 for (; bufp < end;) {
2530 if (!((bufp[13] - 1) & 0xF2)){
2531 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
2532 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
2533 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
2534 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
2535 return AVPROBE_SCORE_MAX;
2544 /* rudimentary byte seek */
2545 /* XXX: use MXF Index */
2546 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2548 AVStream *st = s->streams[stream_index];
2550 MXFContext* mxf = s->priv_data;
2554 MXFTrack *source_track = st->priv_data;
2556 /* if audio then truncate sample_time to EditRate */
2557 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2558 sample_time = av_rescale_q(sample_time, st->time_base,
2559 av_inv_q(source_track->edit_rate));
2561 if (mxf->nb_index_tables <= 0) {
2563 return AVERROR_INVALIDDATA;
2564 if (sample_time < 0)
2566 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2568 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2572 ff_update_cur_dts(s, st, sample_time);
2573 mxf->current_edit_unit = sample_time;
2575 t = &mxf->index_tables[0];
2577 /* clamp above zero, else ff_index_search_timestamp() returns negative
2578 * this also means we allow seeking before the start */
2579 sample_time = FFMAX(sample_time, 0);
2581 if (t->fake_index) {
2582 /* behave as if we have a proper index */
2583 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2586 /* no IndexEntryArray (one or more CBR segments)
2587 * make sure we don't seek past the end */
2588 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2591 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
2594 ff_update_cur_dts(s, st, sample_time);
2595 mxf->current_edit_unit = sample_time;
2596 avio_seek(s->pb, seekpos, SEEK_SET);
2599 // Update all tracks sample count
2600 for (i = 0; i < s->nb_streams; i++) {
2601 AVStream *cur_st = s->streams[i];
2602 MXFTrack *cur_track = cur_st->priv_data;
2603 uint64_t current_sample_count = 0;
2604 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2605 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2609 cur_track->sample_count = current_sample_count;
2615 AVInputFormat ff_mxf_demuxer = {
2617 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2618 .priv_data_size = sizeof(MXFContext),
2619 .read_probe = mxf_probe,
2620 .read_header = mxf_read_header,
2621 .read_packet = mxf_read_packet,
2622 .read_close = mxf_read_close,
2623 .read_seek = mxf_read_seek,