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 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;
210 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
213 enum MXFWrappingScheme {
218 /* NOTE: klv_offset is not set (-1) for local keys */
219 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
223 MXFMetadataReadFunc *read;
225 enum MXFMetadataSetType type;
226 } MXFMetadataReadTableEntry;
228 /* partial keys to match */
229 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
230 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
231 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
232 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
233 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
234 /* complete keys to match */
235 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 };
236 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
237 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
238 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
240 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
242 static int64_t klv_decode_ber_length(AVIOContext *pb)
244 uint64_t size = avio_r8(pb);
245 if (size & 0x80) { /* long form */
246 int bytes_num = size & 0x7f;
247 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
249 return AVERROR_INVALIDDATA;
252 size = size << 8 | avio_r8(pb);
257 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
260 for (i = 0; i < size && !url_feof(pb); i++) {
264 else if (b != key[i])
270 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
272 if (!mxf_read_sync(pb, mxf_klv_key, 4))
273 return AVERROR_INVALIDDATA;
274 klv->offset = avio_tell(pb) - 4;
275 memcpy(klv->key, mxf_klv_key, 4);
276 avio_read(pb, klv->key + 4, 12);
277 klv->length = klv_decode_ber_length(pb);
278 return klv->length == -1 ? -1 : 0;
281 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
285 for (i = 0; i < s->nb_streams; i++) {
286 MXFTrack *track = s->streams[i]->priv_data;
288 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
291 /* return 0 if only one stream, for OP Atom files with 0 as track number */
292 return s->nb_streams == 1 ? 0 : -1;
295 /* XXX: use AVBitStreamFilter */
296 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
298 const uint8_t *buf_ptr, *end_ptr;
302 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
303 return AVERROR_INVALIDDATA;
304 length = av_get_packet(pb, pkt, length);
307 data_ptr = pkt->data;
308 end_ptr = pkt->data + length;
309 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
310 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
311 for (i = 0; i < st->codec->channels; i++) {
312 uint32_t sample = bytestream_get_le32(&buf_ptr);
313 if (st->codec->bits_per_coded_sample == 24)
314 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
316 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
318 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
320 av_shrink_packet(pkt, data_ptr - pkt->data);
324 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
326 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
327 MXFContext *mxf = s->priv_data;
328 AVIOContext *pb = s->pb;
329 int64_t end = avio_tell(pb) + klv->length;
332 uint64_t plaintext_size;
337 if (!mxf->aesc && s->key && s->keylen == 16) {
338 mxf->aesc = av_malloc(av_aes_size);
340 return AVERROR(ENOMEM);
341 av_aes_init(mxf->aesc, s->key, 128, 1);
344 avio_skip(pb, klv_decode_ber_length(pb));
346 klv_decode_ber_length(pb);
347 plaintext_size = avio_rb64(pb);
349 klv_decode_ber_length(pb);
350 avio_read(pb, klv->key, 16);
351 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
352 return AVERROR_INVALIDDATA;
353 index = mxf_get_stream_index(s, klv);
355 return AVERROR_INVALIDDATA;
357 klv_decode_ber_length(pb);
358 orig_size = avio_rb64(pb);
359 if (orig_size < plaintext_size)
360 return AVERROR_INVALIDDATA;
362 size = klv_decode_ber_length(pb);
363 if (size < 32 || size - 32 < orig_size)
364 return AVERROR_INVALIDDATA;
365 avio_read(pb, ivec, 16);
366 avio_read(pb, tmpbuf, 16);
368 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
369 if (memcmp(tmpbuf, checkv, 16))
370 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
372 size = av_get_packet(pb, pkt, size);
375 else if (size < plaintext_size)
376 return AVERROR_INVALIDDATA;
377 size -= plaintext_size;
379 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
380 &pkt->data[plaintext_size], size >> 4, ivec, 1);
381 av_shrink_packet(pkt, orig_size);
382 pkt->stream_index = index;
383 avio_skip(pb, end - avio_tell(pb));
387 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
389 MXFContext *mxf = arg;
390 int item_num = avio_rb32(pb);
391 int item_len = avio_rb32(pb);
393 if (item_len != 18) {
394 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
396 return AVERROR_PATCHWELCOME;
398 if (item_num > UINT_MAX / item_len)
399 return AVERROR_INVALIDDATA;
400 mxf->local_tags_count = item_num;
401 mxf->local_tags = av_malloc(item_num*item_len);
402 if (!mxf->local_tags)
403 return AVERROR(ENOMEM);
404 avio_read(pb, mxf->local_tags, item_num*item_len);
408 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
410 MXFContext *mxf = arg;
411 MXFPartition *partition, *tmp_part;
413 uint64_t footer_partition;
414 uint32_t nb_essence_containers;
416 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
417 return AVERROR(ENOMEM);
419 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
421 return AVERROR(ENOMEM);
422 mxf->partitions = tmp_part;
424 if (mxf->parsing_backward) {
425 /* insert the new partition pack in the middle
426 * this makes the entries in mxf->partitions sorted by offset */
427 memmove(&mxf->partitions[mxf->last_forward_partition+1],
428 &mxf->partitions[mxf->last_forward_partition],
429 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
430 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
432 mxf->last_forward_partition++;
433 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
436 memset(partition, 0, sizeof(*partition));
437 mxf->partitions_count++;
438 partition->pack_length = avio_tell(pb) - klv_offset + size;
442 partition->type = Header;
445 partition->type = BodyPartition;
448 partition->type = Footer;
451 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
452 return AVERROR_INVALIDDATA;
455 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
456 partition->closed = partition->type == Footer || !(uid[14] & 1);
457 partition->complete = uid[14] > 2;
459 partition->kag_size = avio_rb32(pb);
460 partition->this_partition = avio_rb64(pb);
461 partition->previous_partition = avio_rb64(pb);
462 footer_partition = avio_rb64(pb);
463 partition->header_byte_count = avio_rb64(pb);
464 partition->index_byte_count = avio_rb64(pb);
465 partition->index_sid = avio_rb32(pb);
467 partition->body_sid = avio_rb32(pb);
468 avio_read(pb, op, sizeof(UID));
469 nb_essence_containers = avio_rb32(pb);
471 /* some files don'thave FooterPartition set in every partition */
472 if (footer_partition) {
473 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
474 av_log(mxf->fc, AV_LOG_ERROR,
475 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
476 mxf->footer_partition, footer_partition);
478 mxf->footer_partition = footer_partition;
483 "PartitionPack: ThisPartition = 0x%"PRIX64
484 ", PreviousPartition = 0x%"PRIX64", "
485 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
486 partition->this_partition,
487 partition->previous_partition, footer_partition,
488 partition->index_sid, partition->body_sid);
490 /* sanity check PreviousPartition if set */
491 if (partition->previous_partition &&
492 mxf->run_in + partition->previous_partition >= klv_offset) {
493 av_log(mxf->fc, AV_LOG_ERROR,
494 "PreviousPartition points to this partition or forward\n");
495 return AVERROR_INVALIDDATA;
498 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
499 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
500 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
501 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
502 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
503 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
504 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
505 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
506 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
507 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
508 else if (op[12] == 0x10) {
509 /* SMPTE 390m: "There shall be exactly one essence container"
510 * 2011_DCPTEST_24FPS.V.mxf violates this and is frame wrapped, hence why we assume OP1a */
511 if (nb_essence_containers != 1) {
514 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming OP1a\n", nb_essence_containers);
520 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
524 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
525 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
527 if (mxf->op == OPSONYOpt)
528 partition->kag_size = 512;
530 partition->kag_size = 1;
532 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
538 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
540 MXFMetadataSet **tmp;
541 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
542 return AVERROR(ENOMEM);
543 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
545 return AVERROR(ENOMEM);
546 mxf->metadata_sets = tmp;
547 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
548 mxf->metadata_sets_count++;
552 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
554 MXFCryptoContext *cryptocontext = arg;
556 return AVERROR_INVALIDDATA;
557 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
558 avio_read(pb, cryptocontext->source_container_ul, 16);
562 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
564 MXFContext *mxf = arg;
567 mxf->packages_count = avio_rb32(pb);
568 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
569 return AVERROR_INVALIDDATA;
570 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
571 if (!mxf->packages_refs)
572 return AVERROR(ENOMEM);
573 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
574 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
580 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
582 MXFStructuralComponent *source_clip = arg;
585 source_clip->duration = avio_rb64(pb);
588 source_clip->start_position = avio_rb64(pb);
591 /* UMID, only get last 16 bytes */
593 avio_read(pb, source_clip->source_package_uid, 16);
596 source_clip->source_track_id = avio_rb32(pb);
602 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
604 MXFPackage *package = arg;
607 package->tracks_count = avio_rb32(pb);
608 if (package->tracks_count >= UINT_MAX / sizeof(UID))
609 return AVERROR_INVALIDDATA;
610 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
611 if (!package->tracks_refs)
612 return AVERROR(ENOMEM);
613 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
614 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
620 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
622 MXFTrack *track = arg;
625 track->track_id = avio_rb32(pb);
628 avio_read(pb, track->track_number, 4);
631 track->edit_rate.den = avio_rb32(pb);
632 track->edit_rate.num = avio_rb32(pb);
635 avio_read(pb, track->sequence_ref, 16);
641 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
643 MXFSequence *sequence = arg;
646 sequence->duration = avio_rb64(pb);
649 avio_read(pb, sequence->data_definition_ul, 16);
652 sequence->structural_components_count = avio_rb32(pb);
653 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
654 return AVERROR_INVALIDDATA;
655 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
656 if (!sequence->structural_components_refs)
657 return AVERROR(ENOMEM);
658 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
659 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
665 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
667 MXFPackage *package = arg;
670 package->tracks_count = avio_rb32(pb);
671 if (package->tracks_count >= UINT_MAX / sizeof(UID))
672 return AVERROR_INVALIDDATA;
673 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
674 if (!package->tracks_refs)
675 return AVERROR(ENOMEM);
676 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
677 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
680 /* UMID, only get last 16 bytes */
682 avio_read(pb, package->package_uid, 16);
685 avio_read(pb, package->descriptor_ref, 16);
691 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
695 segment->nb_index_entries = avio_rb32(pb);
696 length = avio_rb32(pb);
698 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
699 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
700 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
701 return AVERROR(ENOMEM);
703 for (i = 0; i < segment->nb_index_entries; i++) {
704 segment->temporal_offset_entries[i] = avio_r8(pb);
705 avio_r8(pb); /* KeyFrameOffset */
706 segment->flag_entries[i] = avio_r8(pb);
707 segment->stream_offset_entries[i] = avio_rb64(pb);
708 avio_skip(pb, length - 11);
713 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
715 MXFIndexTableSegment *segment = arg;
718 segment->edit_unit_byte_count = avio_rb32(pb);
719 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
722 segment->index_sid = avio_rb32(pb);
723 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
726 segment->body_sid = avio_rb32(pb);
727 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
730 av_dlog(NULL, "IndexEntryArray found\n");
731 return mxf_read_index_entry_array(pb, segment);
733 segment->index_edit_rate.num = avio_rb32(pb);
734 segment->index_edit_rate.den = avio_rb32(pb);
735 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
736 segment->index_edit_rate.den);
739 segment->index_start_position = avio_rb64(pb);
740 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
743 segment->index_duration = avio_rb64(pb);
744 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
750 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
752 int code, value, ofs = 0;
753 char layout[16] = {0};
758 av_dlog(NULL, "pixel layout: code %#x\n", code);
761 layout[ofs++] = code;
762 layout[ofs++] = value;
764 } while (code != 0); /* SMPTE 377M E.2.46 */
766 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
769 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
771 MXFDescriptor *descriptor = arg;
774 descriptor->sub_descriptors_count = avio_rb32(pb);
775 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
776 return AVERROR_INVALIDDATA;
777 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
778 if (!descriptor->sub_descriptors_refs)
779 return AVERROR(ENOMEM);
780 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
781 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
784 avio_read(pb, descriptor->essence_container_ul, 16);
787 descriptor->linked_track_id = avio_rb32(pb);
789 case 0x3201: /* PictureEssenceCoding */
790 avio_read(pb, descriptor->essence_codec_ul, 16);
793 descriptor->width = avio_rb32(pb);
796 descriptor->height = avio_rb32(pb);
799 descriptor->aspect_ratio.num = avio_rb32(pb);
800 descriptor->aspect_ratio.den = avio_rb32(pb);
803 descriptor->sample_rate.num = avio_rb32(pb);
804 descriptor->sample_rate.den = avio_rb32(pb);
806 case 0x3D06: /* SoundEssenceCompression */
807 avio_read(pb, descriptor->essence_codec_ul, 16);
810 descriptor->channels = avio_rb32(pb);
813 descriptor->bits_per_sample = avio_rb32(pb);
816 mxf_read_pixel_layout(pb, descriptor);
819 /* Private uid used by SONY C0023S01.mxf */
820 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
821 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
822 if (!descriptor->extradata)
823 return AVERROR(ENOMEM);
824 descriptor->extradata_size = size;
825 avio_read(pb, descriptor->extradata, size);
833 * Match an uid independently of the version byte and up to len common bytes
836 static int mxf_match_uid(const UID key, const UID uid, int len)
839 for (i = 0; i < len; i++) {
840 if (i != 7 && key[i] != uid[i])
846 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
848 while (uls->uid[0]) {
849 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
856 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
862 for (i = 0; i < mxf->metadata_sets_count; i++) {
863 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
864 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
865 return mxf->metadata_sets[i];
871 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
872 // video essence container uls
873 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
874 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
875 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
877 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
878 // sound essence container uls
879 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
880 { { 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 */
881 { { 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 */
882 { { 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 */
883 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
886 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
888 int i, j, nb_segments = 0;
889 MXFIndexTableSegment **unsorted_segments;
890 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
892 /* count number of segments, allocate arrays and copy unsorted segments */
893 for (i = 0; i < mxf->metadata_sets_count; i++)
894 if (mxf->metadata_sets[i]->type == IndexTableSegment)
897 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
898 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
899 av_freep(sorted_segments);
900 av_free(unsorted_segments);
901 return AVERROR(ENOMEM);
904 for (i = j = 0; i < mxf->metadata_sets_count; i++)
905 if (mxf->metadata_sets[i]->type == IndexTableSegment)
906 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
908 *nb_sorted_segments = 0;
910 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
911 for (i = 0; i < nb_segments; i++) {
912 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
914 for (j = 0; j < nb_segments; j++) {
915 MXFIndexTableSegment *s = unsorted_segments[j];
917 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
918 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
920 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
921 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
923 best_body_sid = s->body_sid;
924 best_index_sid = s->index_sid;
925 best_index_start = s->index_start_position;
929 /* no suitable entry found -> we're done */
933 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
934 last_body_sid = best_body_sid;
935 last_index_sid = best_index_sid;
936 last_index_start = best_index_start;
939 av_free(unsorted_segments);
945 * Computes the absolute file offset of the given essence container offset
947 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
950 int64_t offset_in = offset; /* for logging */
952 for (x = 0; x < mxf->partitions_count; x++) {
953 MXFPartition *p = &mxf->partitions[x];
955 if (p->body_sid != body_sid)
958 if (offset < p->essence_length || !p->essence_length) {
959 *offset_out = p->essence_offset + offset;
963 offset -= p->essence_length;
966 av_log(mxf->fc, AV_LOG_ERROR,
967 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
968 offset_in, body_sid);
970 return AVERROR_INVALIDDATA;
974 * Returns the end position of the essence container with given BodySID, or zero if unknown
976 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
981 for (x = 0; x < mxf->partitions_count; x++) {
982 MXFPartition *p = &mxf->partitions[x];
984 if (p->body_sid != body_sid)
987 if (!p->essence_length)
990 ret = p->essence_offset + p->essence_length;
996 /* EditUnit -> absolute offset */
997 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)
1000 int64_t offset_temp = 0;
1002 for (i = 0; i < index_table->nb_segments; i++) {
1003 MXFIndexTableSegment *s = index_table->segments[i];
1005 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1007 if (edit_unit < s->index_start_position + s->index_duration) {
1008 int64_t index = edit_unit - s->index_start_position;
1010 if (s->edit_unit_byte_count)
1011 offset_temp += s->edit_unit_byte_count * index;
1012 else if (s->nb_index_entries) {
1013 if (s->nb_index_entries == 2 * s->index_duration + 1)
1014 index *= 2; /* Avid index */
1016 if (index < 0 || index > s->nb_index_entries) {
1017 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1018 index_table->index_sid, s->index_start_position);
1019 return AVERROR_INVALIDDATA;
1022 offset_temp = s->stream_offset_entries[index];
1024 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1025 index_table->index_sid, s->index_start_position);
1026 return AVERROR_INVALIDDATA;
1030 *edit_unit_out = edit_unit;
1032 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1034 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1035 offset_temp += s->edit_unit_byte_count * s->index_duration;
1040 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);
1042 return AVERROR_INVALIDDATA;
1045 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1048 int8_t max_temporal_offset = -128;
1050 /* first compute how many entries we have */
1051 for (i = 0; i < index_table->nb_segments; i++) {
1052 MXFIndexTableSegment *s = index_table->segments[i];
1054 if (!s->nb_index_entries) {
1055 index_table->nb_ptses = 0;
1056 return 0; /* no TemporalOffsets */
1059 index_table->nb_ptses += s->index_duration;
1062 /* paranoid check */
1063 if (index_table->nb_ptses <= 0)
1066 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1067 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1068 av_freep(&index_table->ptses);
1069 return AVERROR(ENOMEM);
1072 /* we may have a few bad TemporalOffsets
1073 * make sure the corresponding PTSes don't have the bogus value 0 */
1074 for (x = 0; x < index_table->nb_ptses; x++)
1075 index_table->ptses[x] = AV_NOPTS_VALUE;
1089 * We want to transform it into this:
1100 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1101 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1102 * The latter makes DTS <= PTS.
1104 for (i = x = 0; i < index_table->nb_segments; i++) {
1105 MXFIndexTableSegment *s = index_table->segments[i];
1106 int index_delta = 1;
1107 int n = s->nb_index_entries;
1109 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1110 index_delta = 2; /* Avid index */
1111 /* ignore the last entry - it's the size of the essence container */
1115 for (j = 0; j < n; j += index_delta, x++) {
1116 int offset = s->temporal_offset_entries[j] / index_delta;
1117 int index = x + offset;
1119 if (x >= index_table->nb_ptses) {
1120 av_log(mxf->fc, AV_LOG_ERROR,
1121 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1122 s->nb_index_entries, s->index_duration);
1126 index_table->fake_index[x].timestamp = x;
1127 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1129 if (index < 0 || index >= index_table->nb_ptses) {
1130 av_log(mxf->fc, AV_LOG_ERROR,
1131 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1136 index_table->ptses[index] = x;
1137 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1141 index_table->first_dts = -max_temporal_offset;
1147 * Sorts and collects index table segments into index tables.
1148 * Also computes PTSes if possible.
1150 static int mxf_compute_index_tables(MXFContext *mxf)
1152 int i, j, k, ret, nb_sorted_segments;
1153 MXFIndexTableSegment **sorted_segments = NULL;
1155 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1156 nb_sorted_segments <= 0) {
1157 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1161 /* sanity check and count unique BodySIDs/IndexSIDs */
1162 for (i = 0; i < nb_sorted_segments; i++) {
1163 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1164 mxf->nb_index_tables++;
1165 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1166 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1167 ret = AVERROR_INVALIDDATA;
1168 goto finish_decoding_index;
1172 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1173 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1174 ret = AVERROR(ENOMEM);
1175 goto finish_decoding_index;
1178 /* distribute sorted segments to index tables */
1179 for (i = j = 0; i < nb_sorted_segments; i++) {
1180 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1185 mxf->index_tables[j].nb_segments++;
1188 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1189 MXFIndexTable *t = &mxf->index_tables[j];
1191 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1192 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1193 ret = AVERROR(ENOMEM);
1194 goto finish_decoding_index;
1197 if (sorted_segments[i]->index_start_position)
1198 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1199 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1201 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1202 t->index_sid = sorted_segments[i]->index_sid;
1203 t->body_sid = sorted_segments[i]->body_sid;
1205 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1206 goto finish_decoding_index;
1208 /* fix zero IndexDurations */
1209 for (k = 0; k < t->nb_segments; k++) {
1210 if (t->segments[k]->index_duration)
1213 if (t->nb_segments > 1)
1214 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1217 if (mxf->fc->nb_streams <= 0) {
1218 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1222 /* assume the first stream's duration is reasonable
1223 * leave index_duration = 0 on further segments in case we have any (unlikely)
1225 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1231 finish_decoding_index:
1232 av_free(sorted_segments);
1236 static int mxf_parse_structural_metadata(MXFContext *mxf)
1238 MXFPackage *material_package = NULL;
1239 MXFPackage *temp_package = NULL;
1242 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1243 /* TODO: handle multiple material packages (OP3x) */
1244 for (i = 0; i < mxf->packages_count; i++) {
1245 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1246 if (material_package) break;
1248 if (!material_package) {
1249 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1250 return AVERROR_INVALIDDATA;
1253 for (i = 0; i < material_package->tracks_count; i++) {
1254 MXFPackage *source_package = NULL;
1255 MXFTrack *material_track = NULL;
1256 MXFTrack *source_track = NULL;
1257 MXFTrack *temp_track = NULL;
1258 MXFDescriptor *descriptor = NULL;
1259 MXFStructuralComponent *component = NULL;
1260 UID *essence_container_ul = NULL;
1261 const MXFCodecUL *codec_ul = NULL;
1262 const MXFCodecUL *container_ul = NULL;
1265 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1266 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1270 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1271 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1275 /* TODO: handle multiple source clips */
1276 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1277 /* TODO: handle timecode component */
1278 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1282 for (k = 0; k < mxf->packages_count; k++) {
1283 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1286 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1287 source_package = temp_package;
1291 if (!source_package) {
1292 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1295 for (k = 0; k < source_package->tracks_count; k++) {
1296 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1297 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1298 ret = AVERROR_INVALIDDATA;
1301 if (temp_track->track_id == component->source_track_id) {
1302 source_track = temp_track;
1306 if (!source_track) {
1307 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1311 if (!source_track || !component)
1314 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1315 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1316 ret = AVERROR_INVALIDDATA;
1320 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1321 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1322 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1323 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1327 st = avformat_new_stream(mxf->fc, NULL);
1329 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1330 ret = AVERROR(ENOMEM);
1333 st->id = source_track->track_id;
1334 st->priv_data = source_track;
1335 st->duration = component->duration;
1336 if (st->duration == -1)
1337 st->duration = AV_NOPTS_VALUE;
1338 st->start_time = component->start_position;
1339 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1341 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1342 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1343 st->codec->codec_type = codec_ul->id;
1345 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1346 if (source_package->descriptor) {
1347 if (source_package->descriptor->type == MultipleDescriptor) {
1348 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1349 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1351 if (!sub_descriptor) {
1352 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1355 if (sub_descriptor->linked_track_id == source_track->track_id) {
1356 descriptor = sub_descriptor;
1360 } else if (source_package->descriptor->type == Descriptor)
1361 descriptor = source_package->descriptor;
1364 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1367 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1368 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1369 essence_container_ul = &descriptor->essence_container_ul;
1370 /* HACK: replacing the original key with mxf_encrypted_essence_container
1371 * is not allowed according to s429-6, try to find correct information anyway */
1372 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1373 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1374 for (k = 0; k < mxf->metadata_sets_count; k++) {
1375 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1376 if (metadata->type == CryptoContext) {
1377 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1383 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1384 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1385 st->codec->codec_id = codec_ul->id;
1386 if (descriptor->extradata) {
1387 st->codec->extradata = descriptor->extradata;
1388 st->codec->extradata_size = descriptor->extradata_size;
1390 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1391 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1392 if (st->codec->codec_id == CODEC_ID_NONE)
1393 st->codec->codec_id = container_ul->id;
1394 st->codec->width = descriptor->width;
1395 st->codec->height = descriptor->height;
1396 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1397 st->codec->pix_fmt = descriptor->pix_fmt;
1398 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1399 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1400 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1401 if (st->codec->codec_id == CODEC_ID_NONE)
1402 st->codec->codec_id = container_ul->id;
1403 st->codec->channels = descriptor->channels;
1404 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1406 if (descriptor->sample_rate.den > 0)
1407 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1409 /* TODO: implement CODEC_ID_RAWAUDIO */
1410 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1411 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1412 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1413 else if (descriptor->bits_per_sample == 32)
1414 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1415 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1416 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1417 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1418 else if (descriptor->bits_per_sample == 32)
1419 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1420 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1421 st->need_parsing = AVSTREAM_PARSE_FULL;
1424 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1425 /* TODO: decode timestamps */
1426 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1435 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1436 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1437 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1438 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1439 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1440 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1441 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1442 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1443 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1444 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1445 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1446 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1447 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1448 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1449 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1450 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1451 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1452 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1453 { { 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 */
1454 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1455 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1456 { { 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 */
1457 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1458 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1459 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1460 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1461 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1462 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1463 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1466 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1468 AVIOContext *pb = mxf->fc->pb;
1469 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1470 uint64_t klv_end = avio_tell(pb) + klv->length;
1473 return AVERROR(ENOMEM);
1474 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1476 int tag = avio_rb16(pb);
1477 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1478 uint64_t next = avio_tell(pb) + size;
1481 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1482 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1483 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1486 if (tag > 0x7FFF) { /* dynamic tag */
1488 for (i = 0; i < mxf->local_tags_count; i++) {
1489 int local_tag = AV_RB16(mxf->local_tags+i*18);
1490 if (local_tag == tag) {
1491 memcpy(uid, mxf->local_tags+i*18+2, 16);
1492 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1493 PRINT_KEY(mxf->fc, "uid", uid);
1497 if (ctx_size && tag == 0x3C0A)
1498 avio_read(pb, ctx->uid, 16);
1499 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1502 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1503 * it extending past the end of the KLV though (zzuf5.mxf). */
1504 if (avio_tell(pb) > klv_end) {
1505 av_log(mxf->fc, AV_LOG_ERROR,
1506 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1508 return AVERROR_INVALIDDATA;
1509 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1510 avio_seek(pb, next, SEEK_SET);
1512 if (ctx_size) ctx->type = type;
1513 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1517 * Seeks to the previous partition, if possible
1518 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1520 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1522 AVIOContext *pb = mxf->fc->pb;
1524 if (!mxf->current_partition ||
1525 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1526 return 0; /* we've parsed all partitions */
1528 /* seek to previous partition */
1529 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1530 mxf->current_partition = NULL;
1532 av_dlog(mxf->fc, "seeking to previous partition\n");
1538 * Called when essence is encountered
1539 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1541 static int mxf_parse_handle_essence(MXFContext *mxf)
1543 AVIOContext *pb = mxf->fc->pb;
1546 if (mxf->parsing_backward) {
1547 return mxf_seek_to_previous_partition(mxf);
1549 if (!mxf->footer_partition) {
1550 av_dlog(mxf->fc, "no footer\n");
1554 av_dlog(mxf->fc, "seeking to footer\n");
1556 /* remember where we were so we don't end up seeking further back than this */
1557 mxf->last_forward_tell = avio_tell(pb);
1559 if (!pb->seekable) {
1560 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1564 /* seek to footer partition and parse backward */
1565 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1566 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1567 mxf->run_in + mxf->footer_partition, ret);
1571 mxf->current_partition = NULL;
1572 mxf->parsing_backward = 1;
1579 * Called when the next partition or EOF is encountered
1580 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1582 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1584 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1588 * Figures out the proper offset and length of the essence container in each partition
1590 static void mxf_compute_essence_containers(MXFContext *mxf)
1594 /* everything is already correct */
1595 if (mxf->op == OPAtom)
1598 for (x = 0; x < mxf->partitions_count; x++) {
1599 MXFPartition *p = &mxf->partitions[x];
1602 continue; /* BodySID == 0 -> no essence */
1604 if (x >= mxf->partitions_count - 1)
1605 break; /* last partition - can't compute length (and we don't need to) */
1607 /* essence container spans to the next partition */
1608 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1610 if (p->essence_length < 0) {
1611 /* next ThisPartition < essence_offset */
1612 p->essence_length = 0;
1613 av_log(mxf->fc, AV_LOG_ERROR,
1614 "partition %i: bad ThisPartition = %"PRIX64"\n",
1615 x+1, mxf->partitions[x+1].this_partition);
1620 static int64_t round_to_kag(int64_t position, int kag_size)
1622 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1623 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1624 int64_t ret = (position / kag_size) * kag_size;
1625 return ret == position ? ret : ret + kag_size;
1628 static int is_pcm(enum CodecID codec_id)
1630 /* we only care about "normal" PCM codecs until we get samples */
1631 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1635 * Deal with the case where for some audio atoms EditUnitByteCount is
1636 * very small (2, 4..). In those cases we should read more than one
1637 * sample per call to mxf_read_packet().
1639 static void mxf_handle_small_eubc(AVFormatContext *s)
1641 MXFContext *mxf = s->priv_data;
1643 /* assuming non-OPAtom == frame wrapped
1644 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1645 if (mxf->op != OPAtom)
1648 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1649 if (s->nb_streams != 1 ||
1650 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1651 !is_pcm(s->streams[0]->codec->codec_id) ||
1652 mxf->nb_index_tables != 1 ||
1653 mxf->index_tables[0].nb_segments != 1 ||
1654 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1657 /* arbitrarily default to 48 kHz PAL audio frame size */
1658 /* TODO: We could compute this from the ratio between the audio
1659 * and video edit rates for 48 kHz NTSC we could use the
1660 * 1802-1802-1802-1802-1801 pattern. */
1661 mxf->edit_units_per_packet = 1920;
1664 static int mxf_read_header(AVFormatContext *s)
1666 MXFContext *mxf = s->priv_data;
1668 int64_t essence_offset = 0;
1671 mxf->last_forward_tell = INT64_MAX;
1672 mxf->edit_units_per_packet = 1;
1674 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1675 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1676 return AVERROR_INVALIDDATA;
1678 avio_seek(s->pb, -14, SEEK_CUR);
1680 mxf->run_in = avio_tell(s->pb);
1682 while (!url_feof(s->pb)) {
1683 const MXFMetadataReadTableEntry *metadata;
1685 if (klv_read_packet(&klv, s->pb) < 0) {
1686 /* EOF - seek to previous partition or stop */
1687 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1693 PRINT_KEY(s, "read header", klv.key);
1694 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1695 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1696 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1697 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1698 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1700 if (!mxf->current_partition) {
1701 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1702 return AVERROR_INVALIDDATA;
1705 if (!mxf->current_partition->essence_offset) {
1706 /* for OP1a we compute essence_offset
1707 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1708 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1709 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1711 int64_t op1a_essence_offset =
1712 round_to_kag(mxf->current_partition->this_partition +
1713 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1714 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1715 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1717 if (mxf->op == OPAtom) {
1718 /* point essence_offset to the actual data
1719 * OPAtom has all the essence in one big KLV
1721 mxf->current_partition->essence_offset = avio_tell(s->pb);
1722 mxf->current_partition->essence_length = klv.length;
1724 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1725 mxf->current_partition->essence_offset = op1a_essence_offset;
1729 if (!essence_offset)
1730 essence_offset = klv.offset;
1732 /* seek to footer, previous partition or stop */
1733 if (mxf_parse_handle_essence(mxf) <= 0)
1736 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1737 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1738 /* next partition pack - keep going, seek to previous partition or stop */
1739 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1743 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1744 if (IS_KLV_KEY(klv.key, metadata->key)) {
1746 if (klv.key[5] == 0x53) {
1747 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1749 uint64_t next = avio_tell(s->pb) + klv.length;
1750 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1752 /* only seek forward, else this can loop for a long time */
1753 if (avio_tell(s->pb) > next) {
1754 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1756 return AVERROR_INVALIDDATA;
1759 avio_seek(s->pb, next, SEEK_SET);
1762 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1768 if (!metadata->read)
1769 avio_skip(s->pb, klv.length);
1771 /* FIXME avoid seek */
1772 if (!essence_offset) {
1773 av_log(s, AV_LOG_ERROR, "no essence\n");
1774 return AVERROR_INVALIDDATA;
1776 avio_seek(s->pb, essence_offset, SEEK_SET);
1778 mxf_compute_essence_containers(mxf);
1780 /* we need to do this before computing the index tables
1781 * to be able to fill in zero IndexDurations with st->duration */
1782 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1785 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1788 if (mxf->nb_index_tables > 1) {
1789 /* TODO: look up which IndexSID to use via EssenceContainerData */
1790 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1791 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1792 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1793 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1794 return AVERROR_INVALIDDATA;
1797 mxf_handle_small_eubc(s);
1803 * Computes DTS and PTS for the given video packet based on its offset.
1805 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1807 int64_t last_ofs = -1, next_ofs;
1808 MXFIndexTable *t = &mxf->index_tables[0];
1810 /* this is called from the OP1a demuxing logic, which means there
1811 * may be no index tables */
1812 if (mxf->nb_index_tables <= 0)
1815 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1816 while (mxf->current_edit_unit >= 0) {
1817 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1820 if (next_ofs <= last_ofs) {
1821 /* large next_ofs didn't change or current_edit_unit wrapped
1822 * around this fixes the infinite loop on zzuf3.mxf */
1823 av_log(mxf->fc, AV_LOG_ERROR,
1824 "next_ofs didn't change. not deriving packet timestamps\n");
1828 if (next_ofs > pkt->pos)
1831 last_ofs = next_ofs;
1832 mxf->current_edit_unit++;
1835 if (mxf->current_edit_unit < 0 || mxf->current_edit_unit >= t->nb_ptses)
1838 pkt->dts = mxf->current_edit_unit + t->first_dts;
1839 pkt->pts = t->ptses[mxf->current_edit_unit];
1842 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1846 while (!url_feof(s->pb)) {
1848 if (klv_read_packet(&klv, s->pb) < 0)
1850 PRINT_KEY(s, "read packet", klv.key);
1851 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1852 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1853 ret = mxf_decrypt_triplet(s, pkt, &klv);
1855 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1856 return AVERROR_INVALIDDATA;
1860 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1861 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1862 int index = mxf_get_stream_index(s, &klv);
1864 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1867 if (s->streams[index]->discard == AVDISCARD_ALL)
1869 /* check for 8 channels AES3 element */
1870 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1871 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1872 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1873 return AVERROR_INVALIDDATA;
1876 ret = av_get_packet(s->pb, pkt, klv.length);
1880 pkt->stream_index = index;
1881 pkt->pos = klv.offset;
1883 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1884 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1889 avio_skip(s->pb, klv.length);
1894 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1896 MXFContext *mxf = s->priv_data;
1898 int64_t ret64, pos, next_pos;
1903 if (mxf->op != OPAtom)
1904 return mxf_read_packet_old(s, pkt);
1906 /* OPAtom - clip wrapped demuxing */
1907 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1909 t = &mxf->index_tables[0];
1911 if (mxf->current_edit_unit >= st->duration)
1914 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
1916 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1919 /* compute size by finding the next edit unit or the end of the essence container
1920 * not pretty, but it works */
1921 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
1922 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1923 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1924 return AVERROR_INVALIDDATA;
1927 if ((size = next_pos - pos) <= 0) {
1928 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1929 return AVERROR_INVALIDDATA;
1932 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1935 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1936 return ret < 0 ? ret : AVERROR_EOF;
1938 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1939 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1940 pkt->dts = mxf->current_edit_unit + t->first_dts;
1941 pkt->pts = t->ptses[mxf->current_edit_unit];
1944 pkt->stream_index = 0;
1945 mxf->current_edit_unit += edit_units;
1950 static int mxf_read_close(AVFormatContext *s)
1952 MXFContext *mxf = s->priv_data;
1953 MXFIndexTableSegment *seg;
1956 av_freep(&mxf->packages_refs);
1958 for (i = 0; i < s->nb_streams; i++)
1959 s->streams[i]->priv_data = NULL;
1961 for (i = 0; i < mxf->metadata_sets_count; i++) {
1962 switch (mxf->metadata_sets[i]->type) {
1963 case MultipleDescriptor:
1964 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1967 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1970 case MaterialPackage:
1971 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1973 case IndexTableSegment:
1974 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1975 av_freep(&seg->temporal_offset_entries);
1976 av_freep(&seg->flag_entries);
1977 av_freep(&seg->stream_offset_entries);
1982 av_freep(&mxf->metadata_sets[i]);
1984 av_freep(&mxf->partitions);
1985 av_freep(&mxf->metadata_sets);
1986 av_freep(&mxf->aesc);
1987 av_freep(&mxf->local_tags);
1989 for (i = 0; i < mxf->nb_index_tables; i++) {
1990 av_freep(&mxf->index_tables[i].segments);
1991 av_freep(&mxf->index_tables[i].ptses);
1992 av_freep(&mxf->index_tables[i].fake_index);
1994 av_freep(&mxf->index_tables);
1999 static int mxf_probe(AVProbeData *p) {
2000 uint8_t *bufp = p->buf;
2001 uint8_t *end = p->buf + p->buf_size;
2003 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2006 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2007 end -= sizeof(mxf_header_partition_pack_key);
2008 for (; bufp < end; bufp++) {
2009 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2010 return AVPROBE_SCORE_MAX;
2015 /* rudimentary byte seek */
2016 /* XXX: use MXF Index */
2017 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2019 AVStream *st = s->streams[stream_index];
2021 MXFContext* mxf = s->priv_data;
2026 if (mxf->index_tables <= 0) {
2028 return AVERROR_INVALIDDATA;
2029 if (sample_time < 0)
2031 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2033 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2035 ff_update_cur_dts(s, st, sample_time);
2037 t = &mxf->index_tables[0];
2039 /* clamp above zero, else ff_index_search_timestamp() returns negative
2040 * this also means we allow seeking before the start */
2041 sample_time = FFMAX(sample_time, 0);
2043 if (t->fake_index) {
2044 /* behave as if we have a proper index */
2045 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2048 /* no IndexEntryArray (one or more CBR segments)
2049 * make sure we don't seek past the end */
2050 sample_time = FFMIN(sample_time, st->duration - 1);
2053 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2056 ff_update_cur_dts(s, st, sample_time);
2057 mxf->current_edit_unit = sample_time;
2058 avio_seek(s->pb, seekpos, SEEK_SET);
2063 AVInputFormat ff_mxf_demuxer = {
2065 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2066 .priv_data_size = sizeof(MXFContext),
2067 .read_probe = mxf_probe,
2068 .read_header = mxf_read_header,
2069 .read_packet = mxf_read_packet,
2070 .read_close = mxf_read_close,
2071 .read_seek = mxf_read_seek,