3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
72 OPSONYOpt, /* FATE sample, violates the spec in places */
78 MXFPartitionType type;
79 uint64_t previous_partition;
82 int64_t this_partition;
83 int64_t essence_offset; ///< absolute offset of essence
84 int64_t essence_length;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
103 int64_t start_position;
105 } MXFStructuralComponent;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
118 enum MXFMetadataSetType type;
119 MXFSequence *sequence; /* mandatory, and only one */
122 uint8_t track_number[4];
123 AVRational edit_rate;
128 enum MXFMetadataSetType type;
129 UID essence_container_ul;
130 UID essence_codec_ul;
131 AVRational sample_rate;
132 AVRational aspect_ratio;
137 unsigned int component_depth;
138 unsigned int horiz_subsampling;
139 unsigned int vert_subsampling;
140 UID *sub_descriptors_refs;
141 int sub_descriptors_count;
145 enum PixelFormat pix_fmt;
150 enum MXFMetadataSetType type;
151 int edit_unit_byte_count;
154 AVRational index_edit_rate;
155 uint64_t index_start_position;
156 uint64_t index_duration;
157 int8_t *temporal_offset_entries;
159 uint64_t *stream_offset_entries;
160 int nb_index_entries;
161 } MXFIndexTableSegment;
165 enum MXFMetadataSetType type;
169 MXFDescriptor *descriptor; /* only one */
175 enum MXFMetadataSetType type;
178 /* decoded index table */
182 int nb_ptses; /* number of PTSes or total duration of index */
183 int64_t first_dts; /* DTS = EditUnit + first_dts */
184 int64_t *ptses; /* maps EditUnit -> PTS */
186 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
187 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
191 MXFPartition *partitions;
192 unsigned partitions_count;
196 MXFMetadataSet **metadata_sets;
197 int metadata_sets_count;
201 int local_tags_count;
202 uint64_t footer_partition;
203 KLVPacket current_klv_data;
204 int current_klv_index;
206 MXFPartition *current_partition;
207 int parsing_backward;
208 int64_t last_forward_tell;
209 int last_forward_partition;
210 int current_edit_unit;
212 MXFIndexTable *index_tables;
213 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
216 enum MXFWrappingScheme {
221 /* NOTE: klv_offset is not set (-1) for local keys */
222 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
226 MXFMetadataReadFunc *read;
228 enum MXFMetadataSetType type;
229 } MXFMetadataReadTableEntry;
231 /* partial keys to match */
232 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
233 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
234 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
235 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
236 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
237 /* complete keys to match */
238 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 };
239 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
240 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
241 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
243 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
245 static int64_t klv_decode_ber_length(AVIOContext *pb)
247 uint64_t size = avio_r8(pb);
248 if (size & 0x80) { /* long form */
249 int bytes_num = size & 0x7f;
250 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
252 return AVERROR_INVALIDDATA;
255 size = size << 8 | avio_r8(pb);
260 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
263 for (i = 0; i < size && !url_feof(pb); i++) {
267 else if (b != key[i])
273 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
275 if (!mxf_read_sync(pb, mxf_klv_key, 4))
276 return AVERROR_INVALIDDATA;
277 klv->offset = avio_tell(pb) - 4;
278 memcpy(klv->key, mxf_klv_key, 4);
279 avio_read(pb, klv->key + 4, 12);
280 klv->length = klv_decode_ber_length(pb);
281 return klv->length == -1 ? -1 : 0;
284 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
288 for (i = 0; i < s->nb_streams; i++) {
289 MXFTrack *track = s->streams[i]->priv_data;
291 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
294 /* return 0 if only one stream, for OP Atom files with 0 as track number */
295 return s->nb_streams == 1 ? 0 : -1;
298 /* XXX: use AVBitStreamFilter */
299 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
301 const uint8_t *buf_ptr, *end_ptr;
305 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
306 return AVERROR_INVALIDDATA;
307 length = av_get_packet(pb, pkt, length);
310 data_ptr = pkt->data;
311 end_ptr = pkt->data + length;
312 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
313 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
314 for (i = 0; i < st->codec->channels; i++) {
315 uint32_t sample = bytestream_get_le32(&buf_ptr);
316 if (st->codec->bits_per_coded_sample == 24)
317 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
319 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
321 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
323 av_shrink_packet(pkt, data_ptr - pkt->data);
327 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
329 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
330 MXFContext *mxf = s->priv_data;
331 AVIOContext *pb = s->pb;
332 int64_t end = avio_tell(pb) + klv->length;
335 uint64_t plaintext_size;
340 if (!mxf->aesc && s->key && s->keylen == 16) {
341 mxf->aesc = av_malloc(av_aes_size);
343 return AVERROR(ENOMEM);
344 av_aes_init(mxf->aesc, s->key, 128, 1);
347 avio_skip(pb, klv_decode_ber_length(pb));
349 klv_decode_ber_length(pb);
350 plaintext_size = avio_rb64(pb);
352 klv_decode_ber_length(pb);
353 avio_read(pb, klv->key, 16);
354 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
355 return AVERROR_INVALIDDATA;
356 index = mxf_get_stream_index(s, klv);
358 return AVERROR_INVALIDDATA;
360 klv_decode_ber_length(pb);
361 orig_size = avio_rb64(pb);
362 if (orig_size < plaintext_size)
363 return AVERROR_INVALIDDATA;
365 size = klv_decode_ber_length(pb);
366 if (size < 32 || size - 32 < orig_size)
367 return AVERROR_INVALIDDATA;
368 avio_read(pb, ivec, 16);
369 avio_read(pb, tmpbuf, 16);
371 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
372 if (memcmp(tmpbuf, checkv, 16))
373 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
375 size = av_get_packet(pb, pkt, size);
378 else if (size < plaintext_size)
379 return AVERROR_INVALIDDATA;
380 size -= plaintext_size;
382 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
383 &pkt->data[plaintext_size], size >> 4, ivec, 1);
384 av_shrink_packet(pkt, orig_size);
385 pkt->stream_index = index;
386 avio_skip(pb, end - avio_tell(pb));
390 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
392 MXFContext *mxf = arg;
393 int item_num = avio_rb32(pb);
394 int item_len = avio_rb32(pb);
396 if (item_len != 18) {
397 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
399 return AVERROR_PATCHWELCOME;
401 if (item_num > UINT_MAX / item_len)
402 return AVERROR_INVALIDDATA;
403 mxf->local_tags_count = item_num;
404 mxf->local_tags = av_malloc(item_num*item_len);
405 if (!mxf->local_tags)
406 return AVERROR(ENOMEM);
407 avio_read(pb, mxf->local_tags, item_num*item_len);
411 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
413 MXFContext *mxf = arg;
414 MXFPartition *partition, *tmp_part;
416 uint64_t footer_partition;
417 uint32_t nb_essence_containers;
419 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
420 return AVERROR(ENOMEM);
422 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
424 return AVERROR(ENOMEM);
425 mxf->partitions = tmp_part;
427 if (mxf->parsing_backward) {
428 /* insert the new partition pack in the middle
429 * this makes the entries in mxf->partitions sorted by offset */
430 memmove(&mxf->partitions[mxf->last_forward_partition+1],
431 &mxf->partitions[mxf->last_forward_partition],
432 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
433 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
435 mxf->last_forward_partition++;
436 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
439 memset(partition, 0, sizeof(*partition));
440 mxf->partitions_count++;
441 partition->pack_length = avio_tell(pb) - klv_offset + size;
445 partition->type = Header;
448 partition->type = BodyPartition;
451 partition->type = Footer;
454 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
455 return AVERROR_INVALIDDATA;
458 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
459 partition->closed = partition->type == Footer || !(uid[14] & 1);
460 partition->complete = uid[14] > 2;
462 partition->kag_size = avio_rb32(pb);
463 partition->this_partition = avio_rb64(pb);
464 partition->previous_partition = avio_rb64(pb);
465 footer_partition = avio_rb64(pb);
466 partition->header_byte_count = avio_rb64(pb);
467 partition->index_byte_count = avio_rb64(pb);
468 partition->index_sid = avio_rb32(pb);
470 partition->body_sid = avio_rb32(pb);
471 avio_read(pb, op, sizeof(UID));
472 nb_essence_containers = avio_rb32(pb);
474 /* some files don'thave FooterPartition set in every partition */
475 if (footer_partition) {
476 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
477 av_log(mxf->fc, AV_LOG_ERROR,
478 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
479 mxf->footer_partition, footer_partition);
481 mxf->footer_partition = footer_partition;
486 "PartitionPack: ThisPartition = 0x%"PRIX64
487 ", PreviousPartition = 0x%"PRIX64", "
488 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
489 partition->this_partition,
490 partition->previous_partition, footer_partition,
491 partition->index_sid, partition->body_sid);
493 /* sanity check PreviousPartition if set */
494 if (partition->previous_partition &&
495 mxf->run_in + partition->previous_partition >= klv_offset) {
496 av_log(mxf->fc, AV_LOG_ERROR,
497 "PreviousPartition points to this partition or forward\n");
498 return AVERROR_INVALIDDATA;
501 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
502 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
503 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
504 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
505 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
506 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
507 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
508 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
509 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
510 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
511 else if (op[12] == 0x10) {
512 /* SMPTE 390m: "There shall be exactly one essence container"
513 * 2011_DCPTEST_24FPS.V.mxf violates this and is frame wrapped, hence why we assume OP1a */
514 if (nb_essence_containers != 1) {
517 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming OP1a\n", nb_essence_containers);
523 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
527 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
528 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
530 if (mxf->op == OPSONYOpt)
531 partition->kag_size = 512;
533 partition->kag_size = 1;
535 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
541 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
543 MXFMetadataSet **tmp;
544 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
545 return AVERROR(ENOMEM);
546 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
548 return AVERROR(ENOMEM);
549 mxf->metadata_sets = tmp;
550 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
551 mxf->metadata_sets_count++;
555 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
557 MXFCryptoContext *cryptocontext = arg;
559 return AVERROR_INVALIDDATA;
560 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
561 avio_read(pb, cryptocontext->source_container_ul, 16);
565 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
567 MXFContext *mxf = arg;
570 mxf->packages_count = avio_rb32(pb);
571 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
572 return AVERROR_INVALIDDATA;
573 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
574 if (!mxf->packages_refs)
575 return AVERROR(ENOMEM);
576 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
577 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
583 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
585 MXFStructuralComponent *source_clip = arg;
588 source_clip->duration = avio_rb64(pb);
591 source_clip->start_position = avio_rb64(pb);
594 /* UMID, only get last 16 bytes */
596 avio_read(pb, source_clip->source_package_uid, 16);
599 source_clip->source_track_id = avio_rb32(pb);
605 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
607 MXFPackage *package = arg;
610 package->tracks_count = avio_rb32(pb);
611 if (package->tracks_count >= UINT_MAX / sizeof(UID))
612 return AVERROR_INVALIDDATA;
613 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
614 if (!package->tracks_refs)
615 return AVERROR(ENOMEM);
616 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
617 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
623 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
625 MXFTrack *track = arg;
628 track->track_id = avio_rb32(pb);
631 avio_read(pb, track->track_number, 4);
634 track->edit_rate.num = avio_rb32(pb);
635 track->edit_rate.den = avio_rb32(pb);
638 avio_read(pb, track->sequence_ref, 16);
644 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
646 MXFSequence *sequence = arg;
649 sequence->duration = avio_rb64(pb);
652 avio_read(pb, sequence->data_definition_ul, 16);
655 sequence->structural_components_count = avio_rb32(pb);
656 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
657 return AVERROR_INVALIDDATA;
658 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
659 if (!sequence->structural_components_refs)
660 return AVERROR(ENOMEM);
661 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
662 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
668 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
670 MXFPackage *package = arg;
673 package->tracks_count = avio_rb32(pb);
674 if (package->tracks_count >= UINT_MAX / sizeof(UID))
675 return AVERROR_INVALIDDATA;
676 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
677 if (!package->tracks_refs)
678 return AVERROR(ENOMEM);
679 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
680 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
683 /* UMID, only get last 16 bytes */
685 avio_read(pb, package->package_uid, 16);
688 avio_read(pb, package->descriptor_ref, 16);
694 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
698 segment->nb_index_entries = avio_rb32(pb);
699 length = avio_rb32(pb);
701 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
702 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
703 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
704 return AVERROR(ENOMEM);
706 for (i = 0; i < segment->nb_index_entries; i++) {
707 segment->temporal_offset_entries[i] = avio_r8(pb);
708 avio_r8(pb); /* KeyFrameOffset */
709 segment->flag_entries[i] = avio_r8(pb);
710 segment->stream_offset_entries[i] = avio_rb64(pb);
711 avio_skip(pb, length - 11);
716 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
718 MXFIndexTableSegment *segment = arg;
721 segment->edit_unit_byte_count = avio_rb32(pb);
722 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
725 segment->index_sid = avio_rb32(pb);
726 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
729 segment->body_sid = avio_rb32(pb);
730 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
733 av_dlog(NULL, "IndexEntryArray found\n");
734 return mxf_read_index_entry_array(pb, segment);
736 segment->index_edit_rate.num = avio_rb32(pb);
737 segment->index_edit_rate.den = avio_rb32(pb);
738 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
739 segment->index_edit_rate.den);
742 segment->index_start_position = avio_rb64(pb);
743 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
746 segment->index_duration = avio_rb64(pb);
747 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
753 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
755 int code, value, ofs = 0;
756 char layout[16] = {0};
761 av_dlog(NULL, "pixel layout: code %#x\n", code);
764 layout[ofs++] = code;
765 layout[ofs++] = value;
767 } while (code != 0); /* SMPTE 377M E.2.46 */
769 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
772 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
774 MXFDescriptor *descriptor = arg;
775 descriptor->pix_fmt = PIX_FMT_NONE;
778 descriptor->sub_descriptors_count = avio_rb32(pb);
779 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
780 return AVERROR_INVALIDDATA;
781 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
782 if (!descriptor->sub_descriptors_refs)
783 return AVERROR(ENOMEM);
784 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
785 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
788 avio_read(pb, descriptor->essence_container_ul, 16);
791 descriptor->linked_track_id = avio_rb32(pb);
793 case 0x3201: /* PictureEssenceCoding */
794 avio_read(pb, descriptor->essence_codec_ul, 16);
797 descriptor->width = avio_rb32(pb);
800 descriptor->height = avio_rb32(pb);
803 descriptor->aspect_ratio.num = avio_rb32(pb);
804 descriptor->aspect_ratio.den = avio_rb32(pb);
807 descriptor->component_depth = avio_rb32(pb);
810 descriptor->horiz_subsampling = avio_rb32(pb);
813 descriptor->vert_subsampling = avio_rb32(pb);
816 descriptor->sample_rate.num = avio_rb32(pb);
817 descriptor->sample_rate.den = avio_rb32(pb);
819 case 0x3D06: /* SoundEssenceCompression */
820 avio_read(pb, descriptor->essence_codec_ul, 16);
823 descriptor->channels = avio_rb32(pb);
826 descriptor->bits_per_sample = avio_rb32(pb);
829 mxf_read_pixel_layout(pb, descriptor);
832 /* Private uid used by SONY C0023S01.mxf */
833 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
834 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
835 if (!descriptor->extradata)
836 return AVERROR(ENOMEM);
837 descriptor->extradata_size = size;
838 avio_read(pb, descriptor->extradata, size);
846 * Match an uid independently of the version byte and up to len common bytes
849 static int mxf_match_uid(const UID key, const UID uid, int len)
852 for (i = 0; i < len; i++) {
853 if (i != 7 && key[i] != uid[i])
859 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
861 while (uls->uid[0]) {
862 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
869 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
875 for (i = 0; i < mxf->metadata_sets_count; i++) {
876 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
877 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
878 return mxf->metadata_sets[i];
884 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
885 // video essence container uls
886 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
887 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
888 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
889 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
891 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
892 // sound essence container uls
893 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
894 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
895 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
896 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
897 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
900 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
902 int i, j, nb_segments = 0;
903 MXFIndexTableSegment **unsorted_segments;
904 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
906 /* count number of segments, allocate arrays and copy unsorted segments */
907 for (i = 0; i < mxf->metadata_sets_count; i++)
908 if (mxf->metadata_sets[i]->type == IndexTableSegment)
911 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
912 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
913 av_freep(sorted_segments);
914 av_free(unsorted_segments);
915 return AVERROR(ENOMEM);
918 for (i = j = 0; i < mxf->metadata_sets_count; i++)
919 if (mxf->metadata_sets[i]->type == IndexTableSegment)
920 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
922 *nb_sorted_segments = 0;
924 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
925 for (i = 0; i < nb_segments; i++) {
926 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
928 for (j = 0; j < nb_segments; j++) {
929 MXFIndexTableSegment *s = unsorted_segments[j];
931 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
932 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
934 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
935 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
937 best_body_sid = s->body_sid;
938 best_index_sid = s->index_sid;
939 best_index_start = s->index_start_position;
943 /* no suitable entry found -> we're done */
947 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
948 last_body_sid = best_body_sid;
949 last_index_sid = best_index_sid;
950 last_index_start = best_index_start;
953 av_free(unsorted_segments);
959 * Computes the absolute file offset of the given essence container offset
961 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
964 int64_t offset_in = offset; /* for logging */
966 for (x = 0; x < mxf->partitions_count; x++) {
967 MXFPartition *p = &mxf->partitions[x];
969 if (p->body_sid != body_sid)
972 if (offset < p->essence_length || !p->essence_length) {
973 *offset_out = p->essence_offset + offset;
977 offset -= p->essence_length;
980 av_log(mxf->fc, AV_LOG_ERROR,
981 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
982 offset_in, body_sid);
984 return AVERROR_INVALIDDATA;
988 * Returns the end position of the essence container with given BodySID, or zero if unknown
990 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
995 for (x = 0; x < mxf->partitions_count; x++) {
996 MXFPartition *p = &mxf->partitions[x];
998 if (p->body_sid != body_sid)
1001 if (!p->essence_length)
1004 ret = p->essence_offset + p->essence_length;
1010 /* EditUnit -> absolute offset */
1011 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)
1014 int64_t offset_temp = 0;
1016 for (i = 0; i < index_table->nb_segments; i++) {
1017 MXFIndexTableSegment *s = index_table->segments[i];
1019 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1021 if (edit_unit < s->index_start_position + s->index_duration) {
1022 int64_t index = edit_unit - s->index_start_position;
1024 if (s->edit_unit_byte_count)
1025 offset_temp += s->edit_unit_byte_count * index;
1026 else if (s->nb_index_entries) {
1027 if (s->nb_index_entries == 2 * s->index_duration + 1)
1028 index *= 2; /* Avid index */
1030 if (index < 0 || index > s->nb_index_entries) {
1031 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1032 index_table->index_sid, s->index_start_position);
1033 return AVERROR_INVALIDDATA;
1036 offset_temp = s->stream_offset_entries[index];
1038 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1039 index_table->index_sid, s->index_start_position);
1040 return AVERROR_INVALIDDATA;
1044 *edit_unit_out = edit_unit;
1046 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1048 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1049 offset_temp += s->edit_unit_byte_count * s->index_duration;
1054 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);
1056 return AVERROR_INVALIDDATA;
1059 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1062 int8_t max_temporal_offset = -128;
1064 /* first compute how many entries we have */
1065 for (i = 0; i < index_table->nb_segments; i++) {
1066 MXFIndexTableSegment *s = index_table->segments[i];
1068 if (!s->nb_index_entries) {
1069 index_table->nb_ptses = 0;
1070 return 0; /* no TemporalOffsets */
1073 index_table->nb_ptses += s->index_duration;
1076 /* paranoid check */
1077 if (index_table->nb_ptses <= 0)
1080 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1081 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1082 av_freep(&index_table->ptses);
1083 return AVERROR(ENOMEM);
1086 /* we may have a few bad TemporalOffsets
1087 * make sure the corresponding PTSes don't have the bogus value 0 */
1088 for (x = 0; x < index_table->nb_ptses; x++)
1089 index_table->ptses[x] = AV_NOPTS_VALUE;
1103 * We want to transform it into this:
1114 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1115 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1116 * The latter makes DTS <= PTS.
1118 for (i = x = 0; i < index_table->nb_segments; i++) {
1119 MXFIndexTableSegment *s = index_table->segments[i];
1120 int index_delta = 1;
1121 int n = s->nb_index_entries;
1123 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1124 index_delta = 2; /* Avid index */
1125 /* ignore the last entry - it's the size of the essence container */
1129 for (j = 0; j < n; j += index_delta, x++) {
1130 int offset = s->temporal_offset_entries[j] / index_delta;
1131 int index = x + offset;
1133 if (x >= index_table->nb_ptses) {
1134 av_log(mxf->fc, AV_LOG_ERROR,
1135 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1136 s->nb_index_entries, s->index_duration);
1140 index_table->fake_index[x].timestamp = x;
1141 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1143 if (index < 0 || index >= index_table->nb_ptses) {
1144 av_log(mxf->fc, AV_LOG_ERROR,
1145 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1150 index_table->ptses[index] = x;
1151 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1155 index_table->first_dts = -max_temporal_offset;
1161 * Sorts and collects index table segments into index tables.
1162 * Also computes PTSes if possible.
1164 static int mxf_compute_index_tables(MXFContext *mxf)
1166 int i, j, k, ret, nb_sorted_segments;
1167 MXFIndexTableSegment **sorted_segments = NULL;
1169 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1170 nb_sorted_segments <= 0) {
1171 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1175 /* sanity check and count unique BodySIDs/IndexSIDs */
1176 for (i = 0; i < nb_sorted_segments; i++) {
1177 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1178 mxf->nb_index_tables++;
1179 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1180 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1181 ret = AVERROR_INVALIDDATA;
1182 goto finish_decoding_index;
1186 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1187 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1188 ret = AVERROR(ENOMEM);
1189 goto finish_decoding_index;
1192 /* distribute sorted segments to index tables */
1193 for (i = j = 0; i < nb_sorted_segments; i++) {
1194 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1199 mxf->index_tables[j].nb_segments++;
1202 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1203 MXFIndexTable *t = &mxf->index_tables[j];
1205 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1206 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1207 ret = AVERROR(ENOMEM);
1208 goto finish_decoding_index;
1211 if (sorted_segments[i]->index_start_position)
1212 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1213 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1215 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1216 t->index_sid = sorted_segments[i]->index_sid;
1217 t->body_sid = sorted_segments[i]->body_sid;
1219 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1220 goto finish_decoding_index;
1222 /* fix zero IndexDurations */
1223 for (k = 0; k < t->nb_segments; k++) {
1224 if (t->segments[k]->index_duration)
1227 if (t->nb_segments > 1)
1228 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1231 if (mxf->fc->nb_streams <= 0) {
1232 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1236 /* assume the first stream's duration is reasonable
1237 * leave index_duration = 0 on further segments in case we have any (unlikely)
1239 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1245 finish_decoding_index:
1246 av_free(sorted_segments);
1250 static int mxf_parse_structural_metadata(MXFContext *mxf)
1252 MXFPackage *material_package = NULL;
1253 MXFPackage *temp_package = NULL;
1256 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1257 /* TODO: handle multiple material packages (OP3x) */
1258 for (i = 0; i < mxf->packages_count; i++) {
1259 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1260 if (material_package) break;
1262 if (!material_package) {
1263 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1264 return AVERROR_INVALIDDATA;
1267 for (i = 0; i < material_package->tracks_count; i++) {
1268 MXFPackage *source_package = NULL;
1269 MXFTrack *material_track = NULL;
1270 MXFTrack *source_track = NULL;
1271 MXFTrack *temp_track = NULL;
1272 MXFDescriptor *descriptor = NULL;
1273 MXFStructuralComponent *component = NULL;
1274 UID *essence_container_ul = NULL;
1275 const MXFCodecUL *codec_ul = NULL;
1276 const MXFCodecUL *container_ul = NULL;
1277 const MXFCodecUL *pix_fmt_ul = NULL;
1280 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1281 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1285 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1286 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1290 /* TODO: handle multiple source clips */
1291 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1292 /* TODO: handle timecode component */
1293 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1297 for (k = 0; k < mxf->packages_count; k++) {
1298 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1301 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1302 source_package = temp_package;
1306 if (!source_package) {
1307 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1310 for (k = 0; k < source_package->tracks_count; k++) {
1311 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1312 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1313 ret = AVERROR_INVALIDDATA;
1316 if (temp_track->track_id == component->source_track_id) {
1317 source_track = temp_track;
1321 if (!source_track) {
1322 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1326 if (!source_track || !component)
1329 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1330 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1331 ret = AVERROR_INVALIDDATA;
1335 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1336 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1337 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1338 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1342 st = avformat_new_stream(mxf->fc, NULL);
1344 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1345 ret = AVERROR(ENOMEM);
1348 st->id = source_track->track_id;
1349 st->priv_data = source_track;
1350 st->duration = component->duration;
1351 if (st->duration == -1)
1352 st->duration = AV_NOPTS_VALUE;
1353 st->start_time = component->start_position;
1354 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1356 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1357 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1358 st->codec->codec_type = codec_ul->id;
1360 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1361 if (source_package->descriptor) {
1362 if (source_package->descriptor->type == MultipleDescriptor) {
1363 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1364 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1366 if (!sub_descriptor) {
1367 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1370 if (sub_descriptor->linked_track_id == source_track->track_id) {
1371 descriptor = sub_descriptor;
1375 } else if (source_package->descriptor->type == Descriptor)
1376 descriptor = source_package->descriptor;
1379 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1382 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1383 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1384 essence_container_ul = &descriptor->essence_container_ul;
1385 /* HACK: replacing the original key with mxf_encrypted_essence_container
1386 * is not allowed according to s429-6, try to find correct information anyway */
1387 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1388 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1389 for (k = 0; k < mxf->metadata_sets_count; k++) {
1390 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1391 if (metadata->type == CryptoContext) {
1392 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1398 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1399 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1400 st->codec->codec_id = codec_ul->id;
1401 if (descriptor->extradata) {
1402 st->codec->extradata = descriptor->extradata;
1403 st->codec->extradata_size = descriptor->extradata_size;
1405 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1406 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1407 if (st->codec->codec_id == CODEC_ID_NONE)
1408 st->codec->codec_id = container_ul->id;
1409 st->codec->width = descriptor->width;
1410 st->codec->height = descriptor->height;
1411 if (st->codec->codec_id == CODEC_ID_RAWVIDEO) {
1412 st->codec->pix_fmt = descriptor->pix_fmt;
1413 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1414 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls, &descriptor->essence_codec_ul);
1415 st->codec->pix_fmt = pix_fmt_ul->id;
1416 if (st->codec->pix_fmt == PIX_FMT_NONE) {
1417 /* support files created before RP224v10 by defaulting to UYVY422
1418 if subsampling is 4:2:2 and component depth is 8-bit */
1419 if (descriptor->horiz_subsampling == 2 &&
1420 descriptor->vert_subsampling == 1 &&
1421 descriptor->component_depth == 8) {
1422 st->codec->pix_fmt = PIX_FMT_UYVY422;
1427 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1428 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1429 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1430 if (st->codec->codec_id == CODEC_ID_NONE)
1431 st->codec->codec_id = container_ul->id;
1432 st->codec->channels = descriptor->channels;
1433 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1435 if (descriptor->sample_rate.den > 0)
1436 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1438 /* TODO: implement CODEC_ID_RAWAUDIO */
1439 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1440 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1441 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1442 else if (descriptor->bits_per_sample == 32)
1443 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1444 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1445 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1446 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1447 else if (descriptor->bits_per_sample == 32)
1448 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1449 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1450 st->need_parsing = AVSTREAM_PARSE_FULL;
1453 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1454 /* TODO: decode timestamps */
1455 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1464 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1465 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1466 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1467 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1468 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1469 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1470 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1471 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1472 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1473 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1474 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1475 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1476 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1477 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1478 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1479 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1480 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1481 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1482 { { 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 */
1483 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1484 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1485 { { 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 */
1486 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1487 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1488 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1489 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1490 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1491 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1492 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1495 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1497 AVIOContext *pb = mxf->fc->pb;
1498 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1499 uint64_t klv_end = avio_tell(pb) + klv->length;
1502 return AVERROR(ENOMEM);
1503 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1505 int tag = avio_rb16(pb);
1506 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1507 uint64_t next = avio_tell(pb) + size;
1510 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1511 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1512 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1515 if (tag > 0x7FFF) { /* dynamic tag */
1517 for (i = 0; i < mxf->local_tags_count; i++) {
1518 int local_tag = AV_RB16(mxf->local_tags+i*18);
1519 if (local_tag == tag) {
1520 memcpy(uid, mxf->local_tags+i*18+2, 16);
1521 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1522 PRINT_KEY(mxf->fc, "uid", uid);
1526 if (ctx_size && tag == 0x3C0A)
1527 avio_read(pb, ctx->uid, 16);
1528 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1531 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1532 * it extending past the end of the KLV though (zzuf5.mxf). */
1533 if (avio_tell(pb) > klv_end) {
1534 av_log(mxf->fc, AV_LOG_ERROR,
1535 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1537 return AVERROR_INVALIDDATA;
1538 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1539 avio_seek(pb, next, SEEK_SET);
1541 if (ctx_size) ctx->type = type;
1542 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1546 * Seeks to the previous partition, if possible
1547 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1549 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1551 AVIOContext *pb = mxf->fc->pb;
1553 if (!mxf->current_partition ||
1554 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1555 return 0; /* we've parsed all partitions */
1557 /* seek to previous partition */
1558 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1559 mxf->current_partition = NULL;
1561 av_dlog(mxf->fc, "seeking to previous partition\n");
1567 * Called when essence is encountered
1568 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1570 static int mxf_parse_handle_essence(MXFContext *mxf)
1572 AVIOContext *pb = mxf->fc->pb;
1575 if (mxf->parsing_backward) {
1576 return mxf_seek_to_previous_partition(mxf);
1578 if (!mxf->footer_partition) {
1579 av_dlog(mxf->fc, "no footer\n");
1583 av_dlog(mxf->fc, "seeking to footer\n");
1585 /* remember where we were so we don't end up seeking further back than this */
1586 mxf->last_forward_tell = avio_tell(pb);
1588 if (!pb->seekable) {
1589 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1593 /* seek to footer partition and parse backward */
1594 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1595 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1596 mxf->run_in + mxf->footer_partition, ret);
1600 mxf->current_partition = NULL;
1601 mxf->parsing_backward = 1;
1608 * Called when the next partition or EOF is encountered
1609 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1611 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1613 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1617 * Figures out the proper offset and length of the essence container in each partition
1619 static void mxf_compute_essence_containers(MXFContext *mxf)
1623 /* everything is already correct */
1624 if (mxf->op == OPAtom)
1627 for (x = 0; x < mxf->partitions_count; x++) {
1628 MXFPartition *p = &mxf->partitions[x];
1631 continue; /* BodySID == 0 -> no essence */
1633 if (x >= mxf->partitions_count - 1)
1634 break; /* last partition - can't compute length (and we don't need to) */
1636 /* essence container spans to the next partition */
1637 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1639 if (p->essence_length < 0) {
1640 /* next ThisPartition < essence_offset */
1641 p->essence_length = 0;
1642 av_log(mxf->fc, AV_LOG_ERROR,
1643 "partition %i: bad ThisPartition = %"PRIX64"\n",
1644 x+1, mxf->partitions[x+1].this_partition);
1649 static int64_t round_to_kag(int64_t position, int kag_size)
1651 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1652 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1653 int64_t ret = (position / kag_size) * kag_size;
1654 return ret == position ? ret : ret + kag_size;
1657 static int is_pcm(enum CodecID codec_id)
1659 /* we only care about "normal" PCM codecs until we get samples */
1660 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1664 * Deal with the case where for some audio atoms EditUnitByteCount is
1665 * very small (2, 4..). In those cases we should read more than one
1666 * sample per call to mxf_read_packet().
1668 static void mxf_handle_small_eubc(AVFormatContext *s)
1670 MXFContext *mxf = s->priv_data;
1672 /* assuming non-OPAtom == frame wrapped
1673 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1674 if (mxf->op != OPAtom)
1677 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1678 if (s->nb_streams != 1 ||
1679 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1680 !is_pcm(s->streams[0]->codec->codec_id) ||
1681 mxf->nb_index_tables != 1 ||
1682 mxf->index_tables[0].nb_segments != 1 ||
1683 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1686 /* arbitrarily default to 48 kHz PAL audio frame size */
1687 /* TODO: We could compute this from the ratio between the audio
1688 * and video edit rates for 48 kHz NTSC we could use the
1689 * 1802-1802-1802-1802-1801 pattern. */
1690 mxf->edit_units_per_packet = 1920;
1693 static int mxf_read_header(AVFormatContext *s)
1695 MXFContext *mxf = s->priv_data;
1697 int64_t essence_offset = 0;
1700 mxf->last_forward_tell = INT64_MAX;
1701 mxf->edit_units_per_packet = 1;
1703 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1704 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1705 return AVERROR_INVALIDDATA;
1707 avio_seek(s->pb, -14, SEEK_CUR);
1709 mxf->run_in = avio_tell(s->pb);
1711 while (!url_feof(s->pb)) {
1712 const MXFMetadataReadTableEntry *metadata;
1714 if (klv_read_packet(&klv, s->pb) < 0) {
1715 /* EOF - seek to previous partition or stop */
1716 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1722 PRINT_KEY(s, "read header", klv.key);
1723 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1724 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1725 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1726 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1727 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1729 if (!mxf->current_partition) {
1730 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1731 return AVERROR_INVALIDDATA;
1734 if (!mxf->current_partition->essence_offset) {
1735 /* for OP1a we compute essence_offset
1736 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1737 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1738 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1740 int64_t op1a_essence_offset =
1741 round_to_kag(mxf->current_partition->this_partition +
1742 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1743 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1744 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1746 if (mxf->op == OPAtom) {
1747 /* point essence_offset to the actual data
1748 * OPAtom has all the essence in one big KLV
1750 mxf->current_partition->essence_offset = avio_tell(s->pb);
1751 mxf->current_partition->essence_length = klv.length;
1753 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1754 mxf->current_partition->essence_offset = op1a_essence_offset;
1758 if (!essence_offset)
1759 essence_offset = klv.offset;
1761 /* seek to footer, previous partition or stop */
1762 if (mxf_parse_handle_essence(mxf) <= 0)
1765 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1766 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1767 /* next partition pack - keep going, seek to previous partition or stop */
1768 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1772 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1773 if (IS_KLV_KEY(klv.key, metadata->key)) {
1775 if (klv.key[5] == 0x53) {
1776 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1778 uint64_t next = avio_tell(s->pb) + klv.length;
1779 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1781 /* only seek forward, else this can loop for a long time */
1782 if (avio_tell(s->pb) > next) {
1783 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1785 return AVERROR_INVALIDDATA;
1788 avio_seek(s->pb, next, SEEK_SET);
1791 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1797 if (!metadata->read)
1798 avio_skip(s->pb, klv.length);
1800 /* FIXME avoid seek */
1801 if (!essence_offset) {
1802 av_log(s, AV_LOG_ERROR, "no essence\n");
1803 return AVERROR_INVALIDDATA;
1805 avio_seek(s->pb, essence_offset, SEEK_SET);
1807 mxf_compute_essence_containers(mxf);
1809 /* we need to do this before computing the index tables
1810 * to be able to fill in zero IndexDurations with st->duration */
1811 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1814 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1817 if (mxf->nb_index_tables > 1) {
1818 /* TODO: look up which IndexSID to use via EssenceContainerData */
1819 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1820 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1821 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1822 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1823 return AVERROR_INVALIDDATA;
1826 mxf_handle_small_eubc(s);
1832 * Computes DTS and PTS for the given video packet based on its offset.
1834 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1836 int64_t last_ofs = -1, next_ofs;
1837 MXFIndexTable *t = &mxf->index_tables[0];
1839 /* this is called from the OP1a demuxing logic, which means there
1840 * may be no index tables */
1841 if (mxf->nb_index_tables <= 0)
1844 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1845 while (mxf->current_edit_unit >= 0) {
1846 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1849 if (next_ofs <= last_ofs) {
1850 /* large next_ofs didn't change or current_edit_unit wrapped
1851 * around this fixes the infinite loop on zzuf3.mxf */
1852 av_log(mxf->fc, AV_LOG_ERROR,
1853 "next_ofs didn't change. not deriving packet timestamps\n");
1857 if (next_ofs > pkt->pos)
1860 last_ofs = next_ofs;
1861 mxf->current_edit_unit++;
1864 if (mxf->current_edit_unit < 0 || mxf->current_edit_unit >= t->nb_ptses)
1867 pkt->dts = mxf->current_edit_unit + t->first_dts;
1868 pkt->pts = t->ptses[mxf->current_edit_unit];
1871 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1875 while (!url_feof(s->pb)) {
1877 if (klv_read_packet(&klv, s->pb) < 0)
1879 PRINT_KEY(s, "read packet", klv.key);
1880 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1881 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1882 ret = mxf_decrypt_triplet(s, pkt, &klv);
1884 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1885 return AVERROR_INVALIDDATA;
1889 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1890 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1891 int index = mxf_get_stream_index(s, &klv);
1893 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1896 if (s->streams[index]->discard == AVDISCARD_ALL)
1898 /* check for 8 channels AES3 element */
1899 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1900 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1901 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1902 return AVERROR_INVALIDDATA;
1905 ret = av_get_packet(s->pb, pkt, klv.length);
1909 pkt->stream_index = index;
1910 pkt->pos = klv.offset;
1912 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1913 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1918 avio_skip(s->pb, klv.length);
1923 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1925 MXFContext *mxf = s->priv_data;
1927 int64_t ret64, pos, next_pos;
1932 if (mxf->op != OPAtom)
1933 return mxf_read_packet_old(s, pkt);
1935 /* OPAtom - clip wrapped demuxing */
1936 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1938 t = &mxf->index_tables[0];
1940 if (mxf->current_edit_unit >= st->duration)
1943 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
1945 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1948 /* compute size by finding the next edit unit or the end of the essence container
1949 * not pretty, but it works */
1950 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
1951 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1952 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1953 return AVERROR_INVALIDDATA;
1956 if ((size = next_pos - pos) <= 0) {
1957 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1958 return AVERROR_INVALIDDATA;
1961 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1964 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1965 return ret < 0 ? ret : AVERROR_EOF;
1967 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1968 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1969 pkt->dts = mxf->current_edit_unit + t->first_dts;
1970 pkt->pts = t->ptses[mxf->current_edit_unit];
1973 pkt->stream_index = 0;
1974 mxf->current_edit_unit += edit_units;
1979 static int mxf_read_close(AVFormatContext *s)
1981 MXFContext *mxf = s->priv_data;
1982 MXFIndexTableSegment *seg;
1985 av_freep(&mxf->packages_refs);
1987 for (i = 0; i < s->nb_streams; i++)
1988 s->streams[i]->priv_data = NULL;
1990 for (i = 0; i < mxf->metadata_sets_count; i++) {
1991 switch (mxf->metadata_sets[i]->type) {
1992 case MultipleDescriptor:
1993 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1996 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1999 case MaterialPackage:
2000 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2002 case IndexTableSegment:
2003 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2004 av_freep(&seg->temporal_offset_entries);
2005 av_freep(&seg->flag_entries);
2006 av_freep(&seg->stream_offset_entries);
2011 av_freep(&mxf->metadata_sets[i]);
2013 av_freep(&mxf->partitions);
2014 av_freep(&mxf->metadata_sets);
2015 av_freep(&mxf->aesc);
2016 av_freep(&mxf->local_tags);
2018 for (i = 0; i < mxf->nb_index_tables; i++) {
2019 av_freep(&mxf->index_tables[i].segments);
2020 av_freep(&mxf->index_tables[i].ptses);
2021 av_freep(&mxf->index_tables[i].fake_index);
2023 av_freep(&mxf->index_tables);
2028 static int mxf_probe(AVProbeData *p) {
2029 uint8_t *bufp = p->buf;
2030 uint8_t *end = p->buf + p->buf_size;
2032 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2035 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2036 end -= sizeof(mxf_header_partition_pack_key);
2037 for (; bufp < end; bufp++) {
2038 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2039 return AVPROBE_SCORE_MAX;
2044 /* rudimentary byte seek */
2045 /* XXX: use MXF Index */
2046 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2048 AVStream *st = s->streams[stream_index];
2050 MXFContext* mxf = s->priv_data;
2055 if (mxf->index_tables <= 0) {
2057 return AVERROR_INVALIDDATA;
2058 if (sample_time < 0)
2060 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2062 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2064 ff_update_cur_dts(s, st, sample_time);
2066 t = &mxf->index_tables[0];
2068 /* clamp above zero, else ff_index_search_timestamp() returns negative
2069 * this also means we allow seeking before the start */
2070 sample_time = FFMAX(sample_time, 0);
2072 if (t->fake_index) {
2073 /* behave as if we have a proper index */
2074 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2077 /* no IndexEntryArray (one or more CBR segments)
2078 * make sure we don't seek past the end */
2079 sample_time = FFMIN(sample_time, st->duration - 1);
2082 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2085 ff_update_cur_dts(s, st, sample_time);
2086 mxf->current_edit_unit = sample_time;
2087 avio_seek(s->pb, seekpos, SEEK_SET);
2092 AVInputFormat ff_mxf_demuxer = {
2094 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2095 .priv_data_size = sizeof(MXFContext),
2096 .read_probe = mxf_probe,
2097 .read_header = mxf_read_header,
2098 .read_packet = mxf_read_packet,
2099 .read_close = mxf_read_close,
2100 .read_seek = mxf_read_seek,