3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 UID *sub_descriptors_refs;
138 int sub_descriptors_count;
142 enum PixelFormat pix_fmt;
147 enum MXFMetadataSetType type;
148 int edit_unit_byte_count;
151 AVRational index_edit_rate;
152 uint64_t index_start_position;
153 uint64_t index_duration;
154 int8_t *temporal_offset_entries;
156 uint64_t *stream_offset_entries;
157 int nb_index_entries;
158 } MXFIndexTableSegment;
162 enum MXFMetadataSetType type;
166 MXFDescriptor *descriptor; /* only one */
172 enum MXFMetadataSetType type;
175 /* decoded index table */
179 int nb_ptses; /* number of PTSes or total duration of index */
180 int64_t first_dts; /* DTS = EditUnit + first_dts */
181 int64_t *ptses; /* maps EditUnit -> PTS */
183 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
184 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
188 MXFPartition *partitions;
189 unsigned partitions_count;
193 MXFMetadataSet **metadata_sets;
194 int metadata_sets_count;
198 int local_tags_count;
199 uint64_t footer_partition;
200 KLVPacket current_klv_data;
201 int current_klv_index;
203 MXFPartition *current_partition;
204 int parsing_backward;
205 int64_t last_forward_tell;
206 int last_forward_partition;
207 int current_edit_unit;
209 MXFIndexTable *index_tables;
212 enum MXFWrappingScheme {
217 /* NOTE: klv_offset is not set (-1) for local keys */
218 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
222 MXFMetadataReadFunc *read;
224 enum MXFMetadataSetType type;
225 } MXFMetadataReadTableEntry;
227 /* partial keys to match */
228 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
229 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
230 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
231 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
232 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
233 /* complete keys to match */
234 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 };
235 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
236 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
237 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
239 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
241 static int64_t klv_decode_ber_length(AVIOContext *pb)
243 uint64_t size = avio_r8(pb);
244 if (size & 0x80) { /* long form */
245 int bytes_num = size & 0x7f;
246 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
248 return AVERROR_INVALIDDATA;
251 size = size << 8 | avio_r8(pb);
256 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
259 for (i = 0; i < size && !pb->eof_reached; i++) {
263 else if (b != key[i])
269 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
271 if (!mxf_read_sync(pb, mxf_klv_key, 4))
272 return AVERROR_INVALIDDATA;
273 klv->offset = avio_tell(pb) - 4;
274 memcpy(klv->key, mxf_klv_key, 4);
275 avio_read(pb, klv->key + 4, 12);
276 klv->length = klv_decode_ber_length(pb);
277 return klv->length == -1 ? -1 : 0;
280 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
284 for (i = 0; i < s->nb_streams; i++) {
285 MXFTrack *track = s->streams[i]->priv_data;
287 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
290 /* return 0 if only one stream, for OP Atom files with 0 as track number */
291 return s->nb_streams == 1 ? 0 : -1;
294 /* XXX: use AVBitStreamFilter */
295 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
297 const uint8_t *buf_ptr, *end_ptr;
301 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
302 return AVERROR_INVALIDDATA;
303 length = av_get_packet(pb, pkt, length);
306 data_ptr = pkt->data;
307 end_ptr = pkt->data + length;
308 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
309 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
310 for (i = 0; i < st->codec->channels; i++) {
311 uint32_t sample = bytestream_get_le32(&buf_ptr);
312 if (st->codec->bits_per_coded_sample == 24)
313 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
315 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
317 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
319 av_shrink_packet(pkt, data_ptr - pkt->data);
323 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
325 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
326 MXFContext *mxf = s->priv_data;
327 AVIOContext *pb = s->pb;
328 int64_t end = avio_tell(pb) + klv->length;
331 uint64_t plaintext_size;
336 if (!mxf->aesc && s->key && s->keylen == 16) {
337 mxf->aesc = av_malloc(av_aes_size);
339 return AVERROR(ENOMEM);
340 av_aes_init(mxf->aesc, s->key, 128, 1);
343 avio_skip(pb, klv_decode_ber_length(pb));
345 klv_decode_ber_length(pb);
346 plaintext_size = avio_rb64(pb);
348 klv_decode_ber_length(pb);
349 avio_read(pb, klv->key, 16);
350 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
351 return AVERROR_INVALIDDATA;
352 index = mxf_get_stream_index(s, klv);
354 return AVERROR_INVALIDDATA;
356 klv_decode_ber_length(pb);
357 orig_size = avio_rb64(pb);
358 if (orig_size < plaintext_size)
359 return AVERROR_INVALIDDATA;
361 size = klv_decode_ber_length(pb);
362 if (size < 32 || size - 32 < orig_size)
363 return AVERROR_INVALIDDATA;
364 avio_read(pb, ivec, 16);
365 avio_read(pb, tmpbuf, 16);
367 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
368 if (memcmp(tmpbuf, checkv, 16))
369 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
371 size = av_get_packet(pb, pkt, size);
374 else if (size < plaintext_size)
375 return AVERROR_INVALIDDATA;
376 size -= plaintext_size;
378 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
379 &pkt->data[plaintext_size], size >> 4, ivec, 1);
380 av_shrink_packet(pkt, orig_size);
381 pkt->stream_index = index;
382 avio_skip(pb, end - avio_tell(pb));
386 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
388 MXFContext *mxf = arg;
389 int item_num = avio_rb32(pb);
390 int item_len = avio_rb32(pb);
392 if (item_len != 18) {
393 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
395 return AVERROR_PATCHWELCOME;
397 if (item_num > UINT_MAX / item_len)
398 return AVERROR_INVALIDDATA;
399 mxf->local_tags_count = item_num;
400 mxf->local_tags = av_malloc(item_num*item_len);
401 if (!mxf->local_tags)
402 return AVERROR(ENOMEM);
403 avio_read(pb, mxf->local_tags, item_num*item_len);
407 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
409 MXFContext *mxf = arg;
410 MXFPartition *partition, *tmp_part;
412 uint64_t footer_partition;
414 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
415 return AVERROR(ENOMEM);
417 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
419 return AVERROR(ENOMEM);
420 mxf->partitions = tmp_part;
422 if (mxf->parsing_backward) {
423 /* insert the new partition pack in the middle
424 * this makes the entries in mxf->partitions sorted by offset */
425 memmove(&mxf->partitions[mxf->last_forward_partition+1],
426 &mxf->partitions[mxf->last_forward_partition],
427 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
428 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
430 mxf->last_forward_partition++;
431 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
434 memset(partition, 0, sizeof(*partition));
435 mxf->partitions_count++;
436 partition->pack_length = avio_tell(pb) - klv_offset + size;
440 partition->type = Header;
443 partition->type = BodyPartition;
446 partition->type = Footer;
449 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
450 return AVERROR_INVALIDDATA;
453 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
454 partition->closed = partition->type == Footer || !(uid[14] & 1);
455 partition->complete = uid[14] > 2;
457 partition->kag_size = avio_rb32(pb);
458 partition->this_partition = avio_rb64(pb);
459 partition->previous_partition = avio_rb64(pb);
460 footer_partition = avio_rb64(pb);
461 partition->header_byte_count = avio_rb64(pb);
462 partition->index_byte_count = avio_rb64(pb);
463 partition->index_sid = avio_rb32(pb);
465 partition->body_sid = avio_rb32(pb);
466 avio_read(pb, op, sizeof(UID));
468 /* some files don'thave FooterPartition set in every partition */
469 if (footer_partition) {
470 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
471 av_log(mxf->fc, AV_LOG_ERROR,
472 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
473 mxf->footer_partition, footer_partition);
475 mxf->footer_partition = footer_partition;
480 "PartitionPack: ThisPartition = 0x%"PRIX64
481 ", PreviousPartition = 0x%"PRIX64", "
482 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
483 partition->this_partition,
484 partition->previous_partition, footer_partition,
485 partition->index_sid, partition->body_sid);
487 /* sanity check PreviousPartition if set */
488 if (partition->previous_partition &&
489 mxf->run_in + partition->previous_partition >= klv_offset) {
490 av_log(mxf->fc, AV_LOG_ERROR,
491 "PreviousPartition points to this partition or forward\n");
492 return AVERROR_INVALIDDATA;
495 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
496 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
497 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
498 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
499 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
500 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
501 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
502 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
503 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
504 else if (op[12] == 0x10) mxf->op = OPAtom;
505 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
507 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
511 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
512 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
514 if (mxf->op == OPSonyOpt)
515 partition->kag_size = 512;
517 partition->kag_size = 1;
519 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
525 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
527 MXFMetadataSet **tmp;
528 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
529 return AVERROR(ENOMEM);
530 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
532 return AVERROR(ENOMEM);
533 mxf->metadata_sets = tmp;
534 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
535 mxf->metadata_sets_count++;
539 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
541 MXFCryptoContext *cryptocontext = arg;
543 return AVERROR_INVALIDDATA;
544 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
545 avio_read(pb, cryptocontext->source_container_ul, 16);
549 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
551 MXFContext *mxf = arg;
554 mxf->packages_count = avio_rb32(pb);
555 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
556 return AVERROR_INVALIDDATA;
557 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
558 if (!mxf->packages_refs)
559 return AVERROR(ENOMEM);
560 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
561 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
567 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
569 MXFStructuralComponent *source_clip = arg;
572 source_clip->duration = avio_rb64(pb);
575 source_clip->start_position = avio_rb64(pb);
578 /* UMID, only get last 16 bytes */
580 avio_read(pb, source_clip->source_package_uid, 16);
583 source_clip->source_track_id = avio_rb32(pb);
589 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
591 MXFPackage *package = arg;
594 package->tracks_count = avio_rb32(pb);
595 if (package->tracks_count >= UINT_MAX / sizeof(UID))
596 return AVERROR_INVALIDDATA;
597 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
598 if (!package->tracks_refs)
599 return AVERROR(ENOMEM);
600 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
601 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
607 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
609 MXFTrack *track = arg;
612 track->track_id = avio_rb32(pb);
615 avio_read(pb, track->track_number, 4);
618 track->edit_rate.den = avio_rb32(pb);
619 track->edit_rate.num = avio_rb32(pb);
622 avio_read(pb, track->sequence_ref, 16);
628 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
630 MXFSequence *sequence = arg;
633 sequence->duration = avio_rb64(pb);
636 avio_read(pb, sequence->data_definition_ul, 16);
639 sequence->structural_components_count = avio_rb32(pb);
640 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
641 return AVERROR_INVALIDDATA;
642 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
643 if (!sequence->structural_components_refs)
644 return AVERROR(ENOMEM);
645 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
646 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
652 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
654 MXFPackage *package = arg;
657 package->tracks_count = avio_rb32(pb);
658 if (package->tracks_count >= UINT_MAX / sizeof(UID))
659 return AVERROR_INVALIDDATA;
660 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
661 if (!package->tracks_refs)
662 return AVERROR(ENOMEM);
663 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
664 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
667 /* UMID, only get last 16 bytes */
669 avio_read(pb, package->package_uid, 16);
672 avio_read(pb, package->descriptor_ref, 16);
678 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
682 segment->nb_index_entries = avio_rb32(pb);
683 if (!segment->nb_index_entries)
685 else if (segment->nb_index_entries < 0 ||
686 segment->nb_index_entries >
687 (INT_MAX >> av_log2(sizeof(*segment->stream_offset_entries))))
688 return AVERROR(ENOMEM);
690 length = avio_rb32(pb);
692 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
693 sizeof(*segment->temporal_offset_entries));
694 segment->flag_entries = av_mallocz(segment->nb_index_entries *
695 sizeof(*segment->flag_entries));
696 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
697 sizeof(*segment->stream_offset_entries));
699 if (!segment->flag_entries || !segment->stream_offset_entries ||
700 !segment->temporal_offset_entries) {
701 av_freep(&segment->flag_entries);
702 av_freep(&segment->stream_offset_entries);
703 av_freep(&segment->temporal_offset_entries);
704 return AVERROR(ENOMEM);
707 for (i = 0; i < segment->nb_index_entries; i++) {
708 segment->temporal_offset_entries[i] = avio_r8(pb);
709 avio_r8(pb); /* KeyFrameOffset */
710 segment->flag_entries[i] = avio_r8(pb);
711 segment->stream_offset_entries[i] = avio_rb64(pb);
712 avio_skip(pb, length - 11);
717 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
719 MXFIndexTableSegment *segment = arg;
722 segment->edit_unit_byte_count = avio_rb32(pb);
723 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
726 segment->index_sid = avio_rb32(pb);
727 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
730 segment->body_sid = avio_rb32(pb);
731 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
734 av_dlog(NULL, "IndexEntryArray found\n");
735 return mxf_read_index_entry_array(pb, segment);
737 segment->index_edit_rate.num = avio_rb32(pb);
738 segment->index_edit_rate.den = avio_rb32(pb);
739 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
740 segment->index_edit_rate.den);
743 segment->index_start_position = avio_rb64(pb);
744 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
747 segment->index_duration = avio_rb64(pb);
748 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
754 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
756 int code, value, ofs = 0;
757 char layout[16] = {0};
762 av_dlog(NULL, "pixel layout: code %#x\n", code);
765 layout[ofs++] = code;
766 layout[ofs++] = value;
768 } while (code != 0); /* SMPTE 377M E.2.46 */
770 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
773 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
775 MXFDescriptor *descriptor = arg;
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->sample_rate.num = avio_rb32(pb);
808 descriptor->sample_rate.den = avio_rb32(pb);
810 case 0x3D06: /* SoundEssenceCompression */
811 avio_read(pb, descriptor->essence_codec_ul, 16);
814 descriptor->channels = avio_rb32(pb);
817 descriptor->bits_per_sample = avio_rb32(pb);
820 mxf_read_pixel_layout(pb, descriptor);
823 /* Private uid used by SONY C0023S01.mxf */
824 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
825 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
826 if (!descriptor->extradata)
827 return AVERROR(ENOMEM);
828 descriptor->extradata_size = size;
829 avio_read(pb, descriptor->extradata, size);
837 * Match an uid independently of the version byte and up to len common bytes
840 static int mxf_match_uid(const UID key, const UID uid, int len)
843 for (i = 0; i < len; i++) {
844 if (i != 7 && key[i] != uid[i])
850 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
852 while (uls->uid[0]) {
853 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
860 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
866 for (i = 0; i < mxf->metadata_sets_count; i++) {
867 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
868 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
869 return mxf->metadata_sets[i];
875 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
876 // video essence container uls
877 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
878 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
879 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
881 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
882 // sound essence container uls
883 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
884 { { 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 */
885 { { 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 */
886 { { 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 */
887 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
890 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
892 int i, j, nb_segments = 0;
893 MXFIndexTableSegment **unsorted_segments;
894 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
896 /* count number of segments, allocate arrays and copy unsorted segments */
897 for (i = 0; i < mxf->metadata_sets_count; i++)
898 if (mxf->metadata_sets[i]->type == IndexTableSegment)
901 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
902 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
903 if (!sorted_segments || !unsorted_segments) {
904 av_freep(sorted_segments);
905 av_free(unsorted_segments);
906 return AVERROR(ENOMEM);
909 for (i = j = 0; i < mxf->metadata_sets_count; i++)
910 if (mxf->metadata_sets[i]->type == IndexTableSegment)
911 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
913 *nb_sorted_segments = 0;
915 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
916 for (i = 0; i < nb_segments; i++) {
917 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
919 for (j = 0; j < nb_segments; j++) {
920 MXFIndexTableSegment *s = unsorted_segments[j];
922 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
923 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
925 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
926 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
928 best_body_sid = s->body_sid;
929 best_index_sid = s->index_sid;
930 best_index_start = s->index_start_position;
934 /* no suitable entry found -> we're done */
938 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
939 last_body_sid = best_body_sid;
940 last_index_sid = best_index_sid;
941 last_index_start = best_index_start;
944 av_free(unsorted_segments);
950 * Computes the absolute file offset of the given essence container offset
952 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
955 int64_t offset_in = offset; /* for logging */
957 for (x = 0; x < mxf->partitions_count; x++) {
958 MXFPartition *p = &mxf->partitions[x];
960 if (p->body_sid != body_sid)
963 if (offset < p->essence_length || !p->essence_length) {
964 *offset_out = p->essence_offset + offset;
968 offset -= p->essence_length;
971 av_log(mxf->fc, AV_LOG_ERROR,
972 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
973 offset_in, body_sid);
975 return AVERROR_INVALIDDATA;
979 * Returns the end position of the essence container with given BodySID, or zero if unknown
981 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
986 for (x = 0; x < mxf->partitions_count; x++) {
987 MXFPartition *p = &mxf->partitions[x];
989 if (p->body_sid != body_sid)
992 if (!p->essence_length)
995 ret = p->essence_offset + p->essence_length;
1001 /* EditUnit -> absolute offset */
1002 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)
1005 int64_t offset_temp = 0;
1007 for (i = 0; i < index_table->nb_segments; i++) {
1008 MXFIndexTableSegment *s = index_table->segments[i];
1010 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1012 if (edit_unit < s->index_start_position + s->index_duration) {
1013 int64_t index = edit_unit - s->index_start_position;
1015 if (s->edit_unit_byte_count)
1016 offset_temp += s->edit_unit_byte_count * index;
1017 else if (s->nb_index_entries) {
1018 if (s->nb_index_entries == 2 * s->index_duration + 1)
1019 index *= 2; /* Avid index */
1021 if (index < 0 || index > s->nb_index_entries) {
1022 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1023 index_table->index_sid, s->index_start_position);
1024 return AVERROR_INVALIDDATA;
1027 offset_temp = s->stream_offset_entries[index];
1029 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1030 index_table->index_sid, s->index_start_position);
1031 return AVERROR_INVALIDDATA;
1035 *edit_unit_out = edit_unit;
1037 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1039 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1040 offset_temp += s->edit_unit_byte_count * s->index_duration;
1045 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);
1047 return AVERROR_INVALIDDATA;
1050 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1053 int8_t max_temporal_offset = -128;
1055 /* first compute how many entries we have */
1056 for (i = 0; i < index_table->nb_segments; i++) {
1057 MXFIndexTableSegment *s = index_table->segments[i];
1059 if (!s->nb_index_entries) {
1060 index_table->nb_ptses = 0;
1061 return 0; /* no TemporalOffsets */
1064 index_table->nb_ptses += s->index_duration;
1067 /* paranoid check */
1068 if (index_table->nb_ptses <= 0)
1071 if (index_table->nb_ptses > INT_MAX >> av_log2(sizeof(AVIndexEntry)) + 1)
1072 return AVERROR(ENOMEM);
1074 index_table->ptses = av_mallocz(index_table->nb_ptses *
1076 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1077 sizeof(AVIndexEntry));
1078 if (!index_table->ptses || !index_table->fake_index) {
1079 av_freep(&index_table->ptses);
1080 return AVERROR(ENOMEM);
1083 /* we may have a few bad TemporalOffsets
1084 * make sure the corresponding PTSes don't have the bogus value 0 */
1085 for (x = 0; x < index_table->nb_ptses; x++)
1086 index_table->ptses[x] = AV_NOPTS_VALUE;
1100 * We want to transform it into this:
1111 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1112 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1113 * The latter makes DTS <= PTS.
1115 for (i = x = 0; i < index_table->nb_segments; i++) {
1116 MXFIndexTableSegment *s = index_table->segments[i];
1117 int index_delta = 1;
1119 if (s->nb_index_entries == 2 * s->index_duration + 1)
1120 index_delta = 2; /* Avid index */
1122 for (j = 0; j < s->nb_index_entries; j += index_delta, x++) {
1123 int offset = s->temporal_offset_entries[j] / index_delta;
1124 int index = x + offset;
1126 if (x >= index_table->nb_ptses) {
1127 av_log(mxf->fc, AV_LOG_ERROR,
1128 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1129 s->nb_index_entries, s->index_duration);
1133 index_table->fake_index[x].timestamp = x;
1134 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1136 if (index < 0 || index >= index_table->nb_ptses) {
1137 av_log(mxf->fc, AV_LOG_ERROR,
1138 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1143 index_table->ptses[index] = x;
1144 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1148 index_table->first_dts = -max_temporal_offset;
1154 * Sorts and collects index table segments into index tables.
1155 * Also computes PTSes if possible.
1157 static int mxf_compute_index_tables(MXFContext *mxf)
1159 int i, j, k, ret, nb_sorted_segments;
1160 MXFIndexTableSegment **sorted_segments = NULL;
1162 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1163 nb_sorted_segments <= 0) {
1164 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1168 /* sanity check and count unique BodySIDs/IndexSIDs */
1169 for (i = 0; i < nb_sorted_segments; i++) {
1170 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1171 mxf->nb_index_tables++;
1172 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1173 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1174 ret = AVERROR_INVALIDDATA;
1175 goto finish_decoding_index;
1179 if (mxf->nb_index_tables > INT_MAX >> av_log2(sizeof(MXFIndexTable)) + 1 ||
1180 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1181 sizeof(MXFIndexTable)))) {
1182 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1183 ret = AVERROR(ENOMEM);
1184 goto finish_decoding_index;
1187 /* distribute sorted segments to index tables */
1188 for (i = j = 0; i < nb_sorted_segments; i++) {
1189 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1194 mxf->index_tables[j].nb_segments++;
1197 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1198 MXFIndexTable *t = &mxf->index_tables[j];
1200 if (t->nb_segments >
1201 (INT_MAX >> av_log2(sizeof(MXFIndexTableSegment *))) ||
1202 !(t->segments = av_mallocz(t->nb_segments *
1203 sizeof(MXFIndexTableSegment*)))) {
1204 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1205 " pointer array\n");
1206 ret = AVERROR(ENOMEM);
1207 goto finish_decoding_index;
1210 if (sorted_segments[i]->index_start_position)
1211 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1212 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1214 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1215 t->index_sid = sorted_segments[i]->index_sid;
1216 t->body_sid = sorted_segments[i]->body_sid;
1218 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1219 goto finish_decoding_index;
1221 /* fix zero IndexDurations */
1222 for (k = 0; k < t->nb_segments; k++) {
1223 if (t->segments[k]->index_duration)
1226 if (t->nb_segments > 1)
1227 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1230 if (mxf->fc->nb_streams <= 0) {
1231 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1235 /* assume the first stream's duration is reasonable
1236 * leave index_duration = 0 on further segments in case we have any (unlikely)
1238 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1244 finish_decoding_index:
1245 av_free(sorted_segments);
1249 static int mxf_parse_structural_metadata(MXFContext *mxf)
1251 MXFPackage *material_package = NULL;
1252 MXFPackage *temp_package = NULL;
1255 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1256 /* TODO: handle multiple material packages (OP3x) */
1257 for (i = 0; i < mxf->packages_count; i++) {
1258 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1259 if (material_package) break;
1261 if (!material_package) {
1262 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1263 return AVERROR_INVALIDDATA;
1266 for (i = 0; i < material_package->tracks_count; i++) {
1267 MXFPackage *source_package = NULL;
1268 MXFTrack *material_track = NULL;
1269 MXFTrack *source_track = NULL;
1270 MXFTrack *temp_track = NULL;
1271 MXFDescriptor *descriptor = NULL;
1272 MXFStructuralComponent *component = NULL;
1273 UID *essence_container_ul = NULL;
1274 const MXFCodecUL *codec_ul = NULL;
1275 const MXFCodecUL *container_ul = NULL;
1278 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1279 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1283 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1284 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1288 /* TODO: handle multiple source clips */
1289 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1290 /* TODO: handle timecode component */
1291 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1295 for (k = 0; k < mxf->packages_count; k++) {
1296 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1299 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1300 source_package = temp_package;
1304 if (!source_package) {
1305 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1308 for (k = 0; k < source_package->tracks_count; k++) {
1309 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1310 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1311 ret = AVERROR_INVALIDDATA;
1314 if (temp_track->track_id == component->source_track_id) {
1315 source_track = temp_track;
1319 if (!source_track) {
1320 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1324 if (!source_track || !component)
1327 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1328 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1329 ret = AVERROR_INVALIDDATA;
1333 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1334 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1335 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1336 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1340 st = avformat_new_stream(mxf->fc, NULL);
1342 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1343 ret = AVERROR(ENOMEM);
1346 st->id = source_track->track_id;
1347 st->priv_data = source_track;
1348 st->duration = component->duration;
1349 if (st->duration == -1)
1350 st->duration = AV_NOPTS_VALUE;
1351 st->start_time = component->start_position;
1352 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1354 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1355 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1356 st->codec->codec_type = codec_ul->id;
1358 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1359 if (source_package->descriptor) {
1360 if (source_package->descriptor->type == MultipleDescriptor) {
1361 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1362 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1364 if (!sub_descriptor) {
1365 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1368 if (sub_descriptor->linked_track_id == source_track->track_id) {
1369 descriptor = sub_descriptor;
1373 } else if (source_package->descriptor->type == Descriptor)
1374 descriptor = source_package->descriptor;
1377 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1380 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1381 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1382 essence_container_ul = &descriptor->essence_container_ul;
1383 /* HACK: replacing the original key with mxf_encrypted_essence_container
1384 * is not allowed according to s429-6, try to find correct information anyway */
1385 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1386 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1387 for (k = 0; k < mxf->metadata_sets_count; k++) {
1388 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1389 if (metadata->type == CryptoContext) {
1390 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1396 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1397 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1398 st->codec->codec_id = codec_ul->id;
1399 if (descriptor->extradata) {
1400 st->codec->extradata = descriptor->extradata;
1401 st->codec->extradata_size = descriptor->extradata_size;
1403 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1404 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1405 if (st->codec->codec_id == CODEC_ID_NONE)
1406 st->codec->codec_id = container_ul->id;
1407 st->codec->width = descriptor->width;
1408 st->codec->height = descriptor->height;
1409 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1410 st->codec->pix_fmt = descriptor->pix_fmt;
1411 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1412 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1413 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1414 if (st->codec->codec_id == CODEC_ID_NONE)
1415 st->codec->codec_id = container_ul->id;
1416 st->codec->channels = descriptor->channels;
1417 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1418 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1419 /* TODO: implement CODEC_ID_RAWAUDIO */
1420 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1421 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1422 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1423 else if (descriptor->bits_per_sample == 32)
1424 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1425 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1426 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1427 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1428 else if (descriptor->bits_per_sample == 32)
1429 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1430 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1431 st->need_parsing = AVSTREAM_PARSE_FULL;
1434 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1435 /* TODO: decode timestamps */
1436 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1445 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1446 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1447 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1448 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1449 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1450 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1451 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1452 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1453 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1454 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1455 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1456 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1457 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1458 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1459 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1460 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1461 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1462 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1463 { { 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 */
1464 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1465 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1466 { { 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 */
1467 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1468 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1469 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1470 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1471 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1472 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1473 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1476 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1478 AVIOContext *pb = mxf->fc->pb;
1479 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1480 uint64_t klv_end = avio_tell(pb) + klv->length;
1483 return AVERROR(ENOMEM);
1484 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1486 int tag = avio_rb16(pb);
1487 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1488 uint64_t next = avio_tell(pb) + size;
1491 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1492 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1493 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1496 if (tag > 0x7FFF) { /* dynamic tag */
1498 for (i = 0; i < mxf->local_tags_count; i++) {
1499 int local_tag = AV_RB16(mxf->local_tags+i*18);
1500 if (local_tag == tag) {
1501 memcpy(uid, mxf->local_tags+i*18+2, 16);
1502 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1503 PRINT_KEY(mxf->fc, "uid", uid);
1507 if (ctx_size && tag == 0x3C0A)
1508 avio_read(pb, ctx->uid, 16);
1509 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1512 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1513 * it extending past the end of the KLV though (zzuf5.mxf). */
1514 if (avio_tell(pb) > klv_end) {
1515 av_log(mxf->fc, AV_LOG_ERROR,
1516 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1518 return AVERROR_INVALIDDATA;
1519 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1520 avio_seek(pb, next, SEEK_SET);
1522 if (ctx_size) ctx->type = type;
1523 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1527 * Seeks to the previous partition, if possible
1528 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1530 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1532 AVIOContext *pb = mxf->fc->pb;
1534 if (!mxf->current_partition ||
1535 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1536 return 0; /* we've parsed all partitions */
1538 /* seek to previous partition */
1539 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1540 mxf->current_partition = NULL;
1542 av_dlog(mxf->fc, "seeking to previous partition\n");
1548 * Called when essence is encountered
1549 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1551 static int mxf_parse_handle_essence(MXFContext *mxf)
1553 AVIOContext *pb = mxf->fc->pb;
1556 if (mxf->parsing_backward) {
1557 return mxf_seek_to_previous_partition(mxf);
1559 if (!mxf->footer_partition) {
1560 av_dlog(mxf->fc, "no footer\n");
1564 av_dlog(mxf->fc, "seeking to footer\n");
1566 /* remember where we were so we don't end up seeking further back than this */
1567 mxf->last_forward_tell = avio_tell(pb);
1569 if (!pb->seekable) {
1570 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1574 /* seek to footer partition and parse backward */
1575 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1576 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1577 mxf->run_in + mxf->footer_partition, ret);
1581 mxf->current_partition = NULL;
1582 mxf->parsing_backward = 1;
1589 * Called when the next partition or EOF is encountered
1590 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1592 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1594 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1598 * Figure out the proper offset and length of the essence container
1601 static void mxf_compute_essence_containers(MXFContext *mxf)
1605 /* everything is already correct */
1606 if (mxf->op == OPAtom)
1609 for (x = 0; x < mxf->partitions_count; x++) {
1610 MXFPartition *p = &mxf->partitions[x];
1613 continue; /* BodySID == 0 -> no essence */
1615 if (x >= mxf->partitions_count - 1)
1616 break; /* last partition - can't compute length (and we don't need to) */
1618 /* essence container spans to the next partition */
1619 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1621 if (p->essence_length < 0) {
1622 /* next ThisPartition < essence_offset */
1623 p->essence_length = 0;
1624 av_log(mxf->fc, AV_LOG_ERROR,
1625 "partition %i: bad ThisPartition = %"PRIX64"\n",
1626 x+1, mxf->partitions[x+1].this_partition);
1631 static int64_t round_to_kag(int64_t position, int kag_size)
1633 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1634 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1635 int64_t ret = (position / kag_size) * kag_size;
1636 return ret == position ? ret : ret + kag_size;
1639 static inline void compute_partition_essence_offset(AVFormatContext *s,
1643 MXFPartition *cur_part = mxf->current_partition;
1644 /* for OP1a we compute essence_offset
1645 * for OPAtom we point essence_offset after the KL
1646 * (usually op1a_essence_offset + 20 or 25)
1647 * TODO: for OP1a we could eliminate this entire if statement, always
1648 * stopping parsing at op1a_essence_offset
1649 * for OPAtom we still need the actual essence_offset though
1650 * (the KL's length can vary)
1652 int64_t op1a_essence_offset =
1653 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1654 cur_part->kag_size) +
1655 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1656 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1658 if (mxf->op == OPAtom) {
1659 /* point essence_offset to the actual data
1660 * OPAtom has all the essence in one big KLV
1662 cur_part->essence_offset = avio_tell(s->pb);
1663 cur_part->essence_length = klv->length;
1665 /* NOTE: op1a_essence_offset may be less than to klv.offset
1667 cur_part->essence_offset = op1a_essence_offset;
1671 static int mxf_read_header(AVFormatContext *s)
1673 MXFContext *mxf = s->priv_data;
1675 int64_t essence_offset = 0;
1678 mxf->last_forward_tell = INT64_MAX;
1680 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1681 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1682 return AVERROR_INVALIDDATA;
1684 avio_seek(s->pb, -14, SEEK_CUR);
1686 mxf->run_in = avio_tell(s->pb);
1688 while (!s->pb->eof_reached) {
1689 const MXFMetadataReadTableEntry *metadata;
1691 if (klv_read_packet(&klv, s->pb) < 0) {
1692 /* EOF - seek to previous partition or stop */
1693 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1699 PRINT_KEY(s, "read header", klv.key);
1700 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1701 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1702 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1703 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1704 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1706 if (!mxf->current_partition) {
1707 av_log(mxf->fc, AV_LOG_ERROR,
1708 "found essence prior to first PartitionPack\n");
1709 return AVERROR_INVALIDDATA;
1712 if (!mxf->current_partition->essence_offset) {
1713 compute_partition_essence_offset(s, mxf, &klv);
1716 if (!essence_offset)
1717 essence_offset = klv.offset;
1719 /* seek to footer, previous partition or stop */
1720 if (mxf_parse_handle_essence(mxf) <= 0)
1723 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1724 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1725 /* next partition pack - keep going, seek to previous partition or stop */
1726 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1730 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1731 if (IS_KLV_KEY(klv.key, metadata->key)) {
1733 if (klv.key[5] == 0x53) {
1734 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1736 uint64_t next = avio_tell(s->pb) + klv.length;
1737 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1739 /* only seek forward, else this can loop for a long time */
1740 if (avio_tell(s->pb) > next) {
1741 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1743 return AVERROR_INVALIDDATA;
1746 avio_seek(s->pb, next, SEEK_SET);
1749 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1755 if (!metadata->read)
1756 avio_skip(s->pb, klv.length);
1758 /* FIXME avoid seek */
1759 if (!essence_offset) {
1760 av_log(s, AV_LOG_ERROR, "no essence\n");
1761 return AVERROR_INVALIDDATA;
1763 avio_seek(s->pb, essence_offset, SEEK_SET);
1765 mxf_compute_essence_containers(mxf);
1767 /* we need to do this before computing the index tables
1768 * to be able to fill in zero IndexDurations with st->duration */
1769 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1772 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1775 if (mxf->nb_index_tables > 1) {
1776 /* TODO: look up which IndexSID to use via EssenceContainerData */
1777 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1778 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1779 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1780 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1781 return AVERROR_INVALIDDATA;
1788 * Computes DTS and PTS for the given video packet based on its offset.
1790 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1792 int64_t last_ofs = -1, next_ofs;
1793 MXFIndexTable *t = &mxf->index_tables[0];
1795 /* this is called from the OP1a demuxing logic, which means there
1796 * may be no index tables */
1797 if (mxf->nb_index_tables <= 0)
1800 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1802 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1805 if (next_ofs <= last_ofs) {
1806 /* large next_ofs didn't change or current_edit_unit wrapped
1807 * around this fixes the infinite loop on zzuf3.mxf */
1808 av_log(mxf->fc, AV_LOG_ERROR,
1809 "next_ofs didn't change. not deriving packet timestamps\n");
1813 if (next_ofs > pkt->pos)
1816 last_ofs = next_ofs;
1817 mxf->current_edit_unit++;
1820 if (mxf->current_edit_unit >= t->nb_ptses)
1823 pkt->dts = mxf->current_edit_unit + t->first_dts;
1824 pkt->pts = t->ptses[mxf->current_edit_unit];
1827 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1831 while (!s->pb->eof_reached) {
1832 if (klv_read_packet(&klv, s->pb) < 0)
1834 PRINT_KEY(s, "read packet", klv.key);
1835 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1836 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1837 int res = mxf_decrypt_triplet(s, pkt, &klv);
1839 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1844 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1845 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1846 int index = mxf_get_stream_index(s, &klv);
1848 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1851 if (s->streams[index]->discard == AVDISCARD_ALL)
1853 /* check for 8 channels AES3 element */
1854 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1855 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1856 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1860 int ret = av_get_packet(s->pb, pkt, klv.length);
1864 pkt->stream_index = index;
1865 pkt->pos = klv.offset;
1867 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1868 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1873 avio_skip(s->pb, klv.length);
1878 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1880 MXFContext *mxf = s->priv_data;
1882 int64_t ret64, pos, next_pos;
1886 if (mxf->op != OPAtom)
1887 return mxf_read_packet_old(s, pkt);
1889 /* OPAtom - clip wrapped demuxing */
1890 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1892 t = &mxf->index_tables[0];
1894 if (mxf->current_edit_unit >= st->duration)
1897 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1900 /* compute size by finding the next edit unit or the end of the essence container
1901 * not pretty, but it works */
1902 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_pos, 0)) < 0 &&
1903 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1904 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1905 return AVERROR_INVALIDDATA;
1908 if ((size = next_pos - pos) <= 0) {
1909 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1910 return AVERROR_INVALIDDATA;
1913 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1916 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1917 return ret < 0 ? ret : AVERROR_EOF;
1919 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1920 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1921 pkt->dts = mxf->current_edit_unit + t->first_dts;
1922 pkt->pts = t->ptses[mxf->current_edit_unit];
1925 pkt->stream_index = 0;
1926 mxf->current_edit_unit++;
1932 static int mxf_read_close(AVFormatContext *s)
1934 MXFContext *mxf = s->priv_data;
1935 MXFIndexTableSegment *seg;
1938 av_freep(&mxf->packages_refs);
1940 for (i = 0; i < s->nb_streams; i++)
1941 s->streams[i]->priv_data = NULL;
1943 for (i = 0; i < mxf->metadata_sets_count; i++) {
1944 switch (mxf->metadata_sets[i]->type) {
1945 case MultipleDescriptor:
1946 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1949 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1952 case MaterialPackage:
1953 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1955 case IndexTableSegment:
1956 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1957 av_freep(&seg->temporal_offset_entries);
1958 av_freep(&seg->flag_entries);
1959 av_freep(&seg->stream_offset_entries);
1964 av_freep(&mxf->metadata_sets[i]);
1966 av_freep(&mxf->partitions);
1967 av_freep(&mxf->metadata_sets);
1968 av_freep(&mxf->aesc);
1969 av_freep(&mxf->local_tags);
1971 for (i = 0; i < mxf->nb_index_tables; i++) {
1972 av_freep(&mxf->index_tables[i].segments);
1973 av_freep(&mxf->index_tables[i].ptses);
1974 av_freep(&mxf->index_tables[i].fake_index);
1976 av_freep(&mxf->index_tables);
1981 static int mxf_probe(AVProbeData *p) {
1982 uint8_t *bufp = p->buf;
1983 uint8_t *end = p->buf + p->buf_size;
1985 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1988 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1989 end -= sizeof(mxf_header_partition_pack_key);
1990 for (; bufp < end; bufp++) {
1991 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1992 return AVPROBE_SCORE_MAX;
1997 /* rudimentary byte seek */
1998 /* XXX: use MXF Index */
1999 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2001 AVStream *st = s->streams[stream_index];
2003 MXFContext* mxf = s->priv_data;
2008 if (mxf->index_tables <= 0) {
2010 return AVERROR_INVALIDDATA;
2011 if (sample_time < 0)
2013 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2015 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2017 ff_update_cur_dts(s, st, sample_time);
2019 t = &mxf->index_tables[0];
2021 /* clamp above zero, else ff_index_search_timestamp() returns negative
2022 * this also means we allow seeking before the start */
2023 sample_time = FFMAX(sample_time, 0);
2025 if (t->fake_index) {
2026 /* behave as if we have a proper index */
2027 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2030 /* no IndexEntryArray (one or more CBR segments)
2031 * make sure we don't seek past the end */
2032 sample_time = FFMIN(sample_time, st->duration - 1);
2035 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2038 ff_update_cur_dts(s, st, sample_time);
2039 mxf->current_edit_unit = sample_time;
2040 avio_seek(s->pb, seekpos, SEEK_SET);
2045 AVInputFormat ff_mxf_demuxer = {
2047 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2048 .priv_data_size = sizeof(MXFContext),
2049 .read_probe = mxf_probe,
2050 .read_header = mxf_read_header,
2051 .read_packet = mxf_read_packet,
2052 .read_close = mxf_read_close,
2053 .read_seek = mxf_read_seek,