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"
51 #include "libavutil/timecode.h"
73 OPSONYOpt, /* FATE sample, violates the spec in places */
79 MXFPartitionType type;
80 uint64_t previous_partition;
83 int64_t this_partition;
84 int64_t essence_offset; ///< absolute offset of essence
85 int64_t essence_length;
87 int64_t header_byte_count;
88 int64_t index_byte_count;
94 enum MXFMetadataSetType type;
95 UID source_container_ul;
100 enum MXFMetadataSetType type;
101 UID source_package_uid;
102 UID data_definition_ul;
104 int64_t start_position;
106 } MXFStructuralComponent;
110 enum MXFMetadataSetType type;
111 UID data_definition_ul;
112 UID *structural_components_refs;
113 int structural_components_count;
119 enum MXFMetadataSetType type;
122 struct AVRational rate;
124 } MXFTimecodeComponent;
128 enum MXFMetadataSetType type;
129 MXFSequence *sequence; /* mandatory, and only one */
132 uint8_t track_number[4];
133 AVRational edit_rate;
139 enum MXFMetadataSetType type;
140 UID essence_container_ul;
141 UID essence_codec_ul;
142 AVRational sample_rate;
143 AVRational aspect_ratio;
145 int height; /* Field height, not frame height */
146 int frame_layout; /* See MXFFrameLayout enum */
149 unsigned int component_depth;
150 unsigned int horiz_subsampling;
151 unsigned int vert_subsampling;
152 UID *sub_descriptors_refs;
153 int sub_descriptors_count;
157 enum AVPixelFormat pix_fmt;
162 enum MXFMetadataSetType type;
163 int edit_unit_byte_count;
166 AVRational index_edit_rate;
167 uint64_t index_start_position;
168 uint64_t index_duration;
169 int8_t *temporal_offset_entries;
171 uint64_t *stream_offset_entries;
172 int nb_index_entries;
173 } MXFIndexTableSegment;
177 enum MXFMetadataSetType type;
181 MXFDescriptor *descriptor; /* only one */
187 enum MXFMetadataSetType type;
190 /* decoded index table */
194 int nb_ptses; /* number of PTSes or total duration of index */
195 int64_t first_dts; /* DTS = EditUnit + first_dts */
196 int64_t *ptses; /* maps EditUnit -> PTS */
198 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
199 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
203 MXFPartition *partitions;
204 unsigned partitions_count;
208 MXFMetadataSet **metadata_sets;
209 int metadata_sets_count;
213 int local_tags_count;
214 uint64_t footer_partition;
215 KLVPacket current_klv_data;
216 int current_klv_index;
218 MXFPartition *current_partition;
219 int parsing_backward;
220 int64_t last_forward_tell;
221 int last_forward_partition;
222 int current_edit_unit;
224 MXFIndexTable *index_tables;
225 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
228 enum MXFWrappingScheme {
233 /* NOTE: klv_offset is not set (-1) for local keys */
234 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
238 MXFMetadataReadFunc *read;
240 enum MXFMetadataSetType type;
241 } MXFMetadataReadTableEntry;
243 /* partial keys to match */
244 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
245 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
246 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
247 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
248 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
249 /* complete keys to match */
250 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 };
251 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
252 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
253 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
255 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
257 static int64_t klv_decode_ber_length(AVIOContext *pb)
259 uint64_t size = avio_r8(pb);
260 if (size & 0x80) { /* long form */
261 int bytes_num = size & 0x7f;
262 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
264 return AVERROR_INVALIDDATA;
267 size = size << 8 | avio_r8(pb);
272 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
275 for (i = 0; i < size && !url_feof(pb); i++) {
279 else if (b != key[i])
285 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
287 if (!mxf_read_sync(pb, mxf_klv_key, 4))
288 return AVERROR_INVALIDDATA;
289 klv->offset = avio_tell(pb) - 4;
290 memcpy(klv->key, mxf_klv_key, 4);
291 avio_read(pb, klv->key + 4, 12);
292 klv->length = klv_decode_ber_length(pb);
293 return klv->length == -1 ? -1 : 0;
296 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
300 for (i = 0; i < s->nb_streams; i++) {
301 MXFTrack *track = s->streams[i]->priv_data;
303 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
306 /* return 0 if only one stream, for OP Atom files with 0 as track number */
307 return s->nb_streams == 1 ? 0 : -1;
310 /* XXX: use AVBitStreamFilter */
311 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
313 const uint8_t *buf_ptr, *end_ptr;
317 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
318 return AVERROR_INVALIDDATA;
319 length = av_get_packet(pb, pkt, length);
322 data_ptr = pkt->data;
323 end_ptr = pkt->data + length;
324 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
325 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
326 for (i = 0; i < st->codec->channels; i++) {
327 uint32_t sample = bytestream_get_le32(&buf_ptr);
328 if (st->codec->bits_per_coded_sample == 24)
329 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
331 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
333 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
335 av_shrink_packet(pkt, data_ptr - pkt->data);
339 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
341 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
342 MXFContext *mxf = s->priv_data;
343 AVIOContext *pb = s->pb;
344 int64_t end = avio_tell(pb) + klv->length;
347 uint64_t plaintext_size;
352 if (!mxf->aesc && s->key && s->keylen == 16) {
353 mxf->aesc = av_aes_alloc();
355 return AVERROR(ENOMEM);
356 av_aes_init(mxf->aesc, s->key, 128, 1);
359 avio_skip(pb, klv_decode_ber_length(pb));
361 klv_decode_ber_length(pb);
362 plaintext_size = avio_rb64(pb);
364 klv_decode_ber_length(pb);
365 avio_read(pb, klv->key, 16);
366 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
367 return AVERROR_INVALIDDATA;
368 index = mxf_get_stream_index(s, klv);
370 return AVERROR_INVALIDDATA;
372 klv_decode_ber_length(pb);
373 orig_size = avio_rb64(pb);
374 if (orig_size < plaintext_size)
375 return AVERROR_INVALIDDATA;
377 size = klv_decode_ber_length(pb);
378 if (size < 32 || size - 32 < orig_size)
379 return AVERROR_INVALIDDATA;
380 avio_read(pb, ivec, 16);
381 avio_read(pb, tmpbuf, 16);
383 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
384 if (memcmp(tmpbuf, checkv, 16))
385 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
387 size = av_get_packet(pb, pkt, size);
390 else if (size < plaintext_size)
391 return AVERROR_INVALIDDATA;
392 size -= plaintext_size;
394 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
395 &pkt->data[plaintext_size], size >> 4, ivec, 1);
396 av_shrink_packet(pkt, orig_size);
397 pkt->stream_index = index;
398 avio_skip(pb, end - avio_tell(pb));
402 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
404 MXFContext *mxf = arg;
405 int item_num = avio_rb32(pb);
406 int item_len = avio_rb32(pb);
408 if (item_len != 18) {
409 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
411 return AVERROR_PATCHWELCOME;
413 if (item_num > 65536) {
414 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
415 return AVERROR_INVALIDDATA;
417 mxf->local_tags = av_calloc(item_num, item_len);
418 if (!mxf->local_tags)
419 return AVERROR(ENOMEM);
420 mxf->local_tags_count = item_num;
421 avio_read(pb, mxf->local_tags, item_num*item_len);
425 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
427 MXFContext *mxf = arg;
428 MXFPartition *partition, *tmp_part;
430 uint64_t footer_partition;
431 uint32_t nb_essence_containers;
433 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
434 return AVERROR(ENOMEM);
436 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
438 return AVERROR(ENOMEM);
439 mxf->partitions = tmp_part;
441 if (mxf->parsing_backward) {
442 /* insert the new partition pack in the middle
443 * this makes the entries in mxf->partitions sorted by offset */
444 memmove(&mxf->partitions[mxf->last_forward_partition+1],
445 &mxf->partitions[mxf->last_forward_partition],
446 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
447 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
449 mxf->last_forward_partition++;
450 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
453 memset(partition, 0, sizeof(*partition));
454 mxf->partitions_count++;
455 partition->pack_length = avio_tell(pb) - klv_offset + size;
459 partition->type = Header;
462 partition->type = BodyPartition;
465 partition->type = Footer;
468 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
469 return AVERROR_INVALIDDATA;
472 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
473 partition->closed = partition->type == Footer || !(uid[14] & 1);
474 partition->complete = uid[14] > 2;
476 partition->kag_size = avio_rb32(pb);
477 partition->this_partition = avio_rb64(pb);
478 partition->previous_partition = avio_rb64(pb);
479 footer_partition = avio_rb64(pb);
480 partition->header_byte_count = avio_rb64(pb);
481 partition->index_byte_count = avio_rb64(pb);
482 partition->index_sid = avio_rb32(pb);
484 partition->body_sid = avio_rb32(pb);
485 avio_read(pb, op, sizeof(UID));
486 nb_essence_containers = avio_rb32(pb);
488 /* some files don'thave FooterPartition set in every partition */
489 if (footer_partition) {
490 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
491 av_log(mxf->fc, AV_LOG_ERROR,
492 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
493 mxf->footer_partition, footer_partition);
495 mxf->footer_partition = footer_partition;
500 "PartitionPack: ThisPartition = 0x%"PRIX64
501 ", PreviousPartition = 0x%"PRIX64", "
502 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
503 partition->this_partition,
504 partition->previous_partition, footer_partition,
505 partition->index_sid, partition->body_sid);
507 /* sanity check PreviousPartition if set */
508 if (partition->previous_partition &&
509 mxf->run_in + partition->previous_partition >= klv_offset) {
510 av_log(mxf->fc, AV_LOG_ERROR,
511 "PreviousPartition points to this partition or forward\n");
512 return AVERROR_INVALIDDATA;
515 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
516 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
517 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
518 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
519 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
520 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
521 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
522 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
523 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
524 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
525 else if (op[12] == 0x10) {
526 /* SMPTE 390m: "There shall be exactly one essence container"
527 * The following block deals with files that violate this, namely:
528 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
529 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
530 if (nb_essence_containers != 1) {
531 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
535 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
536 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
542 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
546 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
547 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
549 if (mxf->op == OPSONYOpt)
550 partition->kag_size = 512;
552 partition->kag_size = 1;
554 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
560 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
562 MXFMetadataSet **tmp;
563 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
564 return AVERROR(ENOMEM);
565 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
567 return AVERROR(ENOMEM);
568 mxf->metadata_sets = tmp;
569 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
570 mxf->metadata_sets_count++;
574 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
576 MXFCryptoContext *cryptocontext = arg;
578 return AVERROR_INVALIDDATA;
579 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
580 avio_read(pb, cryptocontext->source_container_ul, 16);
584 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
586 MXFContext *mxf = arg;
589 mxf->packages_count = avio_rb32(pb);
590 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
591 if (!mxf->packages_refs)
592 return AVERROR(ENOMEM);
593 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
594 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
600 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
602 MXFStructuralComponent *source_clip = arg;
605 source_clip->duration = avio_rb64(pb);
608 source_clip->start_position = avio_rb64(pb);
611 /* UMID, only get last 16 bytes */
613 avio_read(pb, source_clip->source_package_uid, 16);
616 source_clip->source_track_id = avio_rb32(pb);
622 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
624 MXFPackage *package = arg;
627 package->tracks_count = avio_rb32(pb);
628 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
629 if (!package->tracks_refs)
630 return AVERROR(ENOMEM);
631 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
632 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
638 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
640 MXFTimecodeComponent *mxf_timecode = arg;
643 mxf_timecode->start_frame = avio_rb64(pb);
646 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
649 mxf_timecode->drop_frame = avio_r8(pb);
655 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
657 MXFTrack *track = arg;
660 track->track_id = avio_rb32(pb);
663 avio_read(pb, track->track_number, 4);
666 track->edit_rate.num = avio_rb32(pb);
667 track->edit_rate.den = avio_rb32(pb);
670 avio_read(pb, track->sequence_ref, 16);
676 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
678 MXFSequence *sequence = arg;
681 sequence->duration = avio_rb64(pb);
684 avio_read(pb, sequence->data_definition_ul, 16);
687 sequence->structural_components_count = avio_rb32(pb);
688 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
689 if (!sequence->structural_components_refs)
690 return AVERROR(ENOMEM);
691 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
692 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
698 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
700 MXFPackage *package = arg;
703 package->tracks_count = avio_rb32(pb);
704 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
705 if (!package->tracks_refs)
706 return AVERROR(ENOMEM);
707 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
708 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
711 /* UMID, only get last 16 bytes */
713 avio_read(pb, package->package_uid, 16);
716 avio_read(pb, package->descriptor_ref, 16);
722 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
726 segment->nb_index_entries = avio_rb32(pb);
728 length = avio_rb32(pb);
730 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
731 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
732 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
733 return AVERROR(ENOMEM);
735 for (i = 0; i < segment->nb_index_entries; i++) {
736 segment->temporal_offset_entries[i] = avio_r8(pb);
737 avio_r8(pb); /* KeyFrameOffset */
738 segment->flag_entries[i] = avio_r8(pb);
739 segment->stream_offset_entries[i] = avio_rb64(pb);
740 avio_skip(pb, length - 11);
745 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
747 MXFIndexTableSegment *segment = arg;
750 segment->edit_unit_byte_count = avio_rb32(pb);
751 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
754 segment->index_sid = avio_rb32(pb);
755 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
758 segment->body_sid = avio_rb32(pb);
759 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
762 av_dlog(NULL, "IndexEntryArray found\n");
763 return mxf_read_index_entry_array(pb, segment);
765 segment->index_edit_rate.num = avio_rb32(pb);
766 segment->index_edit_rate.den = avio_rb32(pb);
767 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
768 segment->index_edit_rate.den);
771 segment->index_start_position = avio_rb64(pb);
772 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
775 segment->index_duration = avio_rb64(pb);
776 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
782 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
784 int code, value, ofs = 0;
785 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
790 av_dlog(NULL, "pixel layout: code %#x\n", code);
793 layout[ofs++] = code;
794 layout[ofs++] = value;
796 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
797 } while (code != 0); /* SMPTE 377M E.2.46 */
799 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
802 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
804 MXFDescriptor *descriptor = arg;
805 descriptor->pix_fmt = AV_PIX_FMT_NONE;
808 descriptor->sub_descriptors_count = avio_rb32(pb);
809 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
810 if (!descriptor->sub_descriptors_refs)
811 return AVERROR(ENOMEM);
812 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
813 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
816 avio_read(pb, descriptor->essence_container_ul, 16);
819 descriptor->linked_track_id = avio_rb32(pb);
821 case 0x3201: /* PictureEssenceCoding */
822 avio_read(pb, descriptor->essence_codec_ul, 16);
825 descriptor->width = avio_rb32(pb);
828 descriptor->height = avio_rb32(pb);
831 descriptor->frame_layout = avio_r8(pb);
834 descriptor->aspect_ratio.num = avio_rb32(pb);
835 descriptor->aspect_ratio.den = avio_rb32(pb);
838 descriptor->component_depth = avio_rb32(pb);
841 descriptor->horiz_subsampling = avio_rb32(pb);
844 descriptor->vert_subsampling = avio_rb32(pb);
847 descriptor->sample_rate.num = avio_rb32(pb);
848 descriptor->sample_rate.den = avio_rb32(pb);
850 case 0x3D06: /* SoundEssenceCompression */
851 avio_read(pb, descriptor->essence_codec_ul, 16);
854 descriptor->channels = avio_rb32(pb);
857 descriptor->bits_per_sample = avio_rb32(pb);
860 mxf_read_pixel_layout(pb, descriptor);
863 /* Private uid used by SONY C0023S01.mxf */
864 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
865 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
866 if (!descriptor->extradata)
867 return AVERROR(ENOMEM);
868 descriptor->extradata_size = size;
869 avio_read(pb, descriptor->extradata, size);
877 * Match an uid independently of the version byte and up to len common bytes
880 static int mxf_match_uid(const UID key, const UID uid, int len)
883 for (i = 0; i < len; i++) {
884 if (i != 7 && key[i] != uid[i])
890 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
892 while (uls->uid[0]) {
893 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
900 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
906 for (i = 0; i < mxf->metadata_sets_count; i++) {
907 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
908 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
909 return mxf->metadata_sets[i];
915 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
916 // video essence container uls
917 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
918 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
919 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
920 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
923 /* EC ULs for intra-only formats */
924 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
925 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
926 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
929 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
930 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
931 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
932 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
935 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
936 // sound essence container uls
937 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
938 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
939 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
940 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
941 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
944 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
946 int i, j, nb_segments = 0;
947 MXFIndexTableSegment **unsorted_segments;
948 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
950 /* count number of segments, allocate arrays and copy unsorted segments */
951 for (i = 0; i < mxf->metadata_sets_count; i++)
952 if (mxf->metadata_sets[i]->type == IndexTableSegment)
956 return AVERROR_INVALIDDATA;
958 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
959 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
960 av_freep(sorted_segments);
961 av_free(unsorted_segments);
962 return AVERROR(ENOMEM);
965 for (i = j = 0; i < mxf->metadata_sets_count; i++)
966 if (mxf->metadata_sets[i]->type == IndexTableSegment)
967 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
969 *nb_sorted_segments = 0;
971 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
972 for (i = 0; i < nb_segments; i++) {
973 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
974 uint64_t best_index_duration = 0;
976 for (j = 0; j < nb_segments; j++) {
977 MXFIndexTableSegment *s = unsorted_segments[j];
979 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
980 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
981 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
983 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
984 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
985 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
987 best_body_sid = s->body_sid;
988 best_index_sid = s->index_sid;
989 best_index_start = s->index_start_position;
990 best_index_duration = s->index_duration;
994 /* no suitable entry found -> we're done */
998 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
999 last_body_sid = best_body_sid;
1000 last_index_sid = best_index_sid;
1001 last_index_start = best_index_start;
1004 av_free(unsorted_segments);
1010 * Computes the absolute file offset of the given essence container offset
1012 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1015 int64_t offset_in = offset; /* for logging */
1017 for (x = 0; x < mxf->partitions_count; x++) {
1018 MXFPartition *p = &mxf->partitions[x];
1020 if (p->body_sid != body_sid)
1023 if (offset < p->essence_length || !p->essence_length) {
1024 *offset_out = p->essence_offset + offset;
1028 offset -= p->essence_length;
1031 av_log(mxf->fc, AV_LOG_ERROR,
1032 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1033 offset_in, body_sid);
1035 return AVERROR_INVALIDDATA;
1039 * Returns the end position of the essence container with given BodySID, or zero if unknown
1041 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1046 for (x = 0; x < mxf->partitions_count; x++) {
1047 MXFPartition *p = &mxf->partitions[x];
1049 if (p->body_sid != body_sid)
1052 if (!p->essence_length)
1055 ret = p->essence_offset + p->essence_length;
1061 /* EditUnit -> absolute offset */
1062 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)
1065 int64_t offset_temp = 0;
1067 for (i = 0; i < index_table->nb_segments; i++) {
1068 MXFIndexTableSegment *s = index_table->segments[i];
1070 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1072 if (edit_unit < s->index_start_position + s->index_duration) {
1073 int64_t index = edit_unit - s->index_start_position;
1075 if (s->edit_unit_byte_count)
1076 offset_temp += s->edit_unit_byte_count * index;
1077 else if (s->nb_index_entries) {
1078 if (s->nb_index_entries == 2 * s->index_duration + 1)
1079 index *= 2; /* Avid index */
1081 if (index < 0 || index >= s->nb_index_entries) {
1082 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1083 index_table->index_sid, s->index_start_position);
1084 return AVERROR_INVALIDDATA;
1087 offset_temp = s->stream_offset_entries[index];
1089 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1090 index_table->index_sid, s->index_start_position);
1091 return AVERROR_INVALIDDATA;
1095 *edit_unit_out = edit_unit;
1097 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1099 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1100 offset_temp += s->edit_unit_byte_count * s->index_duration;
1105 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);
1107 return AVERROR_INVALIDDATA;
1110 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1113 int8_t max_temporal_offset = -128;
1115 /* first compute how many entries we have */
1116 for (i = 0; i < index_table->nb_segments; i++) {
1117 MXFIndexTableSegment *s = index_table->segments[i];
1119 if (!s->nb_index_entries) {
1120 index_table->nb_ptses = 0;
1121 return 0; /* no TemporalOffsets */
1124 index_table->nb_ptses += s->index_duration;
1127 /* paranoid check */
1128 if (index_table->nb_ptses <= 0)
1131 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1132 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1133 av_freep(&index_table->ptses);
1134 return AVERROR(ENOMEM);
1137 /* we may have a few bad TemporalOffsets
1138 * make sure the corresponding PTSes don't have the bogus value 0 */
1139 for (x = 0; x < index_table->nb_ptses; x++)
1140 index_table->ptses[x] = AV_NOPTS_VALUE;
1154 * We want to transform it into this:
1165 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1166 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1167 * The latter makes DTS <= PTS.
1169 for (i = x = 0; i < index_table->nb_segments; i++) {
1170 MXFIndexTableSegment *s = index_table->segments[i];
1171 int index_delta = 1;
1172 int n = s->nb_index_entries;
1174 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1175 index_delta = 2; /* Avid index */
1176 /* ignore the last entry - it's the size of the essence container */
1180 for (j = 0; j < n; j += index_delta, x++) {
1181 int offset = s->temporal_offset_entries[j] / index_delta;
1182 int index = x + offset;
1184 if (x >= index_table->nb_ptses) {
1185 av_log(mxf->fc, AV_LOG_ERROR,
1186 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1187 s->nb_index_entries, s->index_duration);
1191 index_table->fake_index[x].timestamp = x;
1192 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1194 if (index < 0 || index >= index_table->nb_ptses) {
1195 av_log(mxf->fc, AV_LOG_ERROR,
1196 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1201 index_table->ptses[index] = x;
1202 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1206 index_table->first_dts = -max_temporal_offset;
1212 * Sorts and collects index table segments into index tables.
1213 * Also computes PTSes if possible.
1215 static int mxf_compute_index_tables(MXFContext *mxf)
1217 int i, j, k, ret, nb_sorted_segments;
1218 MXFIndexTableSegment **sorted_segments = NULL;
1220 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1221 nb_sorted_segments <= 0) {
1222 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1226 /* sanity check and count unique BodySIDs/IndexSIDs */
1227 for (i = 0; i < nb_sorted_segments; i++) {
1228 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1229 mxf->nb_index_tables++;
1230 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1231 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1232 ret = AVERROR_INVALIDDATA;
1233 goto finish_decoding_index;
1237 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1238 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1239 ret = AVERROR(ENOMEM);
1240 goto finish_decoding_index;
1243 /* distribute sorted segments to index tables */
1244 for (i = j = 0; i < nb_sorted_segments; i++) {
1245 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1250 mxf->index_tables[j].nb_segments++;
1253 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1254 MXFIndexTable *t = &mxf->index_tables[j];
1256 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1257 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1258 ret = AVERROR(ENOMEM);
1259 goto finish_decoding_index;
1262 if (sorted_segments[i]->index_start_position)
1263 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1264 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1266 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1267 t->index_sid = sorted_segments[i]->index_sid;
1268 t->body_sid = sorted_segments[i]->body_sid;
1270 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1271 goto finish_decoding_index;
1273 /* fix zero IndexDurations */
1274 for (k = 0; k < t->nb_segments; k++) {
1275 if (t->segments[k]->index_duration)
1278 if (t->nb_segments > 1)
1279 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1282 if (mxf->fc->nb_streams <= 0) {
1283 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1287 /* assume the first stream's duration is reasonable
1288 * leave index_duration = 0 on further segments in case we have any (unlikely)
1290 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1296 finish_decoding_index:
1297 av_free(sorted_segments);
1301 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1303 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1304 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1305 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1306 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1309 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1311 char buf[AV_TIMECODE_STR_SIZE];
1312 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1317 static int mxf_parse_structural_metadata(MXFContext *mxf)
1319 MXFPackage *material_package = NULL;
1320 MXFPackage *temp_package = NULL;
1323 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1324 /* TODO: handle multiple material packages (OP3x) */
1325 for (i = 0; i < mxf->packages_count; i++) {
1326 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1327 if (material_package) break;
1329 if (!material_package) {
1330 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1331 return AVERROR_INVALIDDATA;
1334 for (i = 0; i < material_package->tracks_count; i++) {
1335 MXFPackage *source_package = NULL;
1336 MXFTrack *material_track = NULL;
1337 MXFTrack *source_track = NULL;
1338 MXFTrack *temp_track = NULL;
1339 MXFDescriptor *descriptor = NULL;
1340 MXFStructuralComponent *component = NULL;
1341 MXFTimecodeComponent *mxf_tc = NULL;
1342 UID *essence_container_ul = NULL;
1343 const MXFCodecUL *codec_ul = NULL;
1344 const MXFCodecUL *container_ul = NULL;
1345 const MXFCodecUL *pix_fmt_ul = NULL;
1350 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1351 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1355 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1356 mxf_tc = (MXFTimecodeComponent*)component;
1357 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1358 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1359 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1363 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1364 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1368 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1369 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1373 mxf_tc = (MXFTimecodeComponent*)component;
1374 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1375 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1376 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1381 /* TODO: handle multiple source clips */
1382 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1383 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1387 for (k = 0; k < mxf->packages_count; k++) {
1388 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1391 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1392 source_package = temp_package;
1396 if (!source_package) {
1397 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1400 for (k = 0; k < source_package->tracks_count; k++) {
1401 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1402 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1403 ret = AVERROR_INVALIDDATA;
1406 if (temp_track->track_id == component->source_track_id) {
1407 source_track = temp_track;
1411 if (!source_track) {
1412 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1416 if (!source_track || !component)
1419 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1420 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1421 ret = AVERROR_INVALIDDATA;
1425 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1426 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1427 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1428 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1432 st = avformat_new_stream(mxf->fc, NULL);
1434 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1435 ret = AVERROR(ENOMEM);
1438 st->id = source_track->track_id;
1439 st->priv_data = source_track;
1440 st->duration = component->duration;
1441 if (st->duration == -1)
1442 st->duration = AV_NOPTS_VALUE;
1443 st->start_time = component->start_position;
1444 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1446 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1447 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1448 st->codec->codec_type = codec_ul->id;
1450 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1451 if (source_package->descriptor) {
1452 if (source_package->descriptor->type == MultipleDescriptor) {
1453 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1454 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1456 if (!sub_descriptor) {
1457 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1460 if (sub_descriptor->linked_track_id == source_track->track_id) {
1461 descriptor = sub_descriptor;
1465 } else if (source_package->descriptor->type == Descriptor)
1466 descriptor = source_package->descriptor;
1469 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1472 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1473 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1474 essence_container_ul = &descriptor->essence_container_ul;
1475 /* HACK: replacing the original key with mxf_encrypted_essence_container
1476 * is not allowed according to s429-6, try to find correct information anyway */
1477 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1478 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1479 for (k = 0; k < mxf->metadata_sets_count; k++) {
1480 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1481 if (metadata->type == CryptoContext) {
1482 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1488 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1489 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1490 st->codec->codec_id = codec_ul->id;
1491 if (descriptor->extradata) {
1492 st->codec->extradata = descriptor->extradata;
1493 st->codec->extradata_size = descriptor->extradata_size;
1495 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1496 source_track->intra_only = mxf_is_intra_only(descriptor);
1497 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1498 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1499 st->codec->codec_id = container_ul->id;
1500 st->codec->width = descriptor->width;
1501 st->codec->height = descriptor->height; /* Field height, not frame height */
1502 switch (descriptor->frame_layout) {
1503 case SegmentedFrame:
1504 /* This one is a weird layout I don't fully understand. */
1505 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1510 /* Every other line is stored and needs to be duplicated. */
1511 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1512 break; /* The correct thing to do here is fall through, but by breaking we might be
1513 able to decode some streams at half the vertical resolution, rather than not al all.
1514 It's also for compatibility with the old behavior. */
1517 case SeparateFields:
1518 st->codec->height *= 2; /* Turn field height into frame height. */
1521 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1523 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1524 st->codec->pix_fmt = descriptor->pix_fmt;
1525 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1526 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1527 &descriptor->essence_codec_ul);
1528 st->codec->pix_fmt = pix_fmt_ul->id;
1529 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1530 /* support files created before RP224v10 by defaulting to UYVY422
1531 if subsampling is 4:2:2 and component depth is 8-bit */
1532 if (descriptor->horiz_subsampling == 2 &&
1533 descriptor->vert_subsampling == 1 &&
1534 descriptor->component_depth == 8) {
1535 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1540 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1541 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1542 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1543 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1544 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && container_ul->id != AV_CODEC_ID_NONE))
1545 st->codec->codec_id = container_ul->id;
1546 st->codec->channels = descriptor->channels;
1547 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1549 if (descriptor->sample_rate.den > 0)
1550 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1552 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1553 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1554 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1555 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1556 else if (descriptor->bits_per_sample == 32)
1557 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1558 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1559 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1560 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1561 else if (descriptor->bits_per_sample == 32)
1562 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1563 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1564 st->need_parsing = AVSTREAM_PARSE_FULL;
1567 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1568 /* TODO: decode timestamps */
1569 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1578 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1579 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1580 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1591 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1593 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1594 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1596 { { 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 */
1597 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1598 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1599 { { 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 */
1600 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1601 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1602 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1603 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1604 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1605 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1606 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1607 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1610 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1612 AVIOContext *pb = mxf->fc->pb;
1613 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1614 uint64_t klv_end = avio_tell(pb) + klv->length;
1617 return AVERROR(ENOMEM);
1618 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1620 int tag = avio_rb16(pb);
1621 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1622 uint64_t next = avio_tell(pb) + size;
1625 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1626 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1627 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1630 if (tag > 0x7FFF) { /* dynamic tag */
1632 for (i = 0; i < mxf->local_tags_count; i++) {
1633 int local_tag = AV_RB16(mxf->local_tags+i*18);
1634 if (local_tag == tag) {
1635 memcpy(uid, mxf->local_tags+i*18+2, 16);
1636 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1637 PRINT_KEY(mxf->fc, "uid", uid);
1641 if (ctx_size && tag == 0x3C0A)
1642 avio_read(pb, ctx->uid, 16);
1643 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1646 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1647 * it extending past the end of the KLV though (zzuf5.mxf). */
1648 if (avio_tell(pb) > klv_end) {
1652 av_log(mxf->fc, AV_LOG_ERROR,
1653 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1655 return AVERROR_INVALIDDATA;
1656 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1657 avio_seek(pb, next, SEEK_SET);
1659 if (ctx_size) ctx->type = type;
1660 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1664 * Seeks to the previous partition, if possible
1665 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1667 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1669 AVIOContext *pb = mxf->fc->pb;
1671 if (!mxf->current_partition ||
1672 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1673 return 0; /* we've parsed all partitions */
1675 /* seek to previous partition */
1676 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1677 mxf->current_partition = NULL;
1679 av_dlog(mxf->fc, "seeking to previous partition\n");
1685 * Called when essence is encountered
1686 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1688 static int mxf_parse_handle_essence(MXFContext *mxf)
1690 AVIOContext *pb = mxf->fc->pb;
1693 if (mxf->parsing_backward) {
1694 return mxf_seek_to_previous_partition(mxf);
1696 if (!mxf->footer_partition) {
1697 av_dlog(mxf->fc, "no footer\n");
1701 av_dlog(mxf->fc, "seeking to footer\n");
1703 /* remember where we were so we don't end up seeking further back than this */
1704 mxf->last_forward_tell = avio_tell(pb);
1706 if (!pb->seekable) {
1707 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1711 /* seek to footer partition and parse backward */
1712 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1713 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1714 mxf->run_in + mxf->footer_partition, ret);
1718 mxf->current_partition = NULL;
1719 mxf->parsing_backward = 1;
1726 * Called when the next partition or EOF is encountered
1727 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1729 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1731 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1735 * Figures out the proper offset and length of the essence container in each partition
1737 static void mxf_compute_essence_containers(MXFContext *mxf)
1741 /* everything is already correct */
1742 if (mxf->op == OPAtom)
1745 for (x = 0; x < mxf->partitions_count; x++) {
1746 MXFPartition *p = &mxf->partitions[x];
1749 continue; /* BodySID == 0 -> no essence */
1751 if (x >= mxf->partitions_count - 1)
1752 break; /* last partition - can't compute length (and we don't need to) */
1754 /* essence container spans to the next partition */
1755 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1757 if (p->essence_length < 0) {
1758 /* next ThisPartition < essence_offset */
1759 p->essence_length = 0;
1760 av_log(mxf->fc, AV_LOG_ERROR,
1761 "partition %i: bad ThisPartition = %"PRIX64"\n",
1762 x+1, mxf->partitions[x+1].this_partition);
1767 static int64_t round_to_kag(int64_t position, int kag_size)
1769 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1770 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1771 int64_t ret = (position / kag_size) * kag_size;
1772 return ret == position ? ret : ret + kag_size;
1775 static int is_pcm(enum AVCodecID codec_id)
1777 /* we only care about "normal" PCM codecs until we get samples */
1778 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1782 * Deal with the case where for some audio atoms EditUnitByteCount is
1783 * very small (2, 4..). In those cases we should read more than one
1784 * sample per call to mxf_read_packet().
1786 static void mxf_handle_small_eubc(AVFormatContext *s)
1788 MXFContext *mxf = s->priv_data;
1790 /* assuming non-OPAtom == frame wrapped
1791 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1792 if (mxf->op != OPAtom)
1795 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1796 if (s->nb_streams != 1 ||
1797 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1798 !is_pcm(s->streams[0]->codec->codec_id) ||
1799 mxf->nb_index_tables != 1 ||
1800 mxf->index_tables[0].nb_segments != 1 ||
1801 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1804 /* arbitrarily default to 48 kHz PAL audio frame size */
1805 /* TODO: We could compute this from the ratio between the audio
1806 * and video edit rates for 48 kHz NTSC we could use the
1807 * 1802-1802-1802-1802-1801 pattern. */
1808 mxf->edit_units_per_packet = 1920;
1811 static int mxf_read_header(AVFormatContext *s)
1813 MXFContext *mxf = s->priv_data;
1815 int64_t essence_offset = 0;
1818 mxf->last_forward_tell = INT64_MAX;
1819 mxf->edit_units_per_packet = 1;
1821 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1822 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1823 return AVERROR_INVALIDDATA;
1825 avio_seek(s->pb, -14, SEEK_CUR);
1827 mxf->run_in = avio_tell(s->pb);
1829 while (!url_feof(s->pb)) {
1830 const MXFMetadataReadTableEntry *metadata;
1832 if (klv_read_packet(&klv, s->pb) < 0) {
1833 /* EOF - seek to previous partition or stop */
1834 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1840 PRINT_KEY(s, "read header", klv.key);
1841 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1842 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1843 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1844 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1845 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1847 if (!mxf->current_partition) {
1848 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1849 return AVERROR_INVALIDDATA;
1852 if (!mxf->current_partition->essence_offset) {
1853 /* for OP1a we compute essence_offset
1854 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1855 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1856 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1858 int64_t op1a_essence_offset =
1859 round_to_kag(mxf->current_partition->this_partition +
1860 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1861 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1862 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1864 if (mxf->op == OPAtom) {
1865 /* point essence_offset to the actual data
1866 * OPAtom has all the essence in one big KLV
1868 mxf->current_partition->essence_offset = avio_tell(s->pb);
1869 mxf->current_partition->essence_length = klv.length;
1871 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1872 mxf->current_partition->essence_offset = op1a_essence_offset;
1876 if (!essence_offset)
1877 essence_offset = klv.offset;
1879 /* seek to footer, previous partition or stop */
1880 if (mxf_parse_handle_essence(mxf) <= 0)
1883 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1884 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1885 /* next partition pack - keep going, seek to previous partition or stop */
1886 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1888 else if (mxf->parsing_backward)
1890 /* we're still parsing forward. proceed to parsing this partition pack */
1893 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1894 if (IS_KLV_KEY(klv.key, metadata->key)) {
1896 if (klv.key[5] == 0x53) {
1897 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1899 uint64_t next = avio_tell(s->pb) + klv.length;
1900 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1902 /* only seek forward, else this can loop for a long time */
1903 if (avio_tell(s->pb) > next) {
1904 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1906 return AVERROR_INVALIDDATA;
1909 avio_seek(s->pb, next, SEEK_SET);
1912 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1918 if (!metadata->read)
1919 avio_skip(s->pb, klv.length);
1921 /* FIXME avoid seek */
1922 if (!essence_offset) {
1923 av_log(s, AV_LOG_ERROR, "no essence\n");
1924 return AVERROR_INVALIDDATA;
1926 avio_seek(s->pb, essence_offset, SEEK_SET);
1928 mxf_compute_essence_containers(mxf);
1930 /* we need to do this before computing the index tables
1931 * to be able to fill in zero IndexDurations with st->duration */
1932 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1935 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1938 if (mxf->nb_index_tables > 1) {
1939 /* TODO: look up which IndexSID to use via EssenceContainerData */
1940 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1941 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1942 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1943 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1944 return AVERROR_INVALIDDATA;
1947 mxf_handle_small_eubc(s);
1953 * Sets mxf->current_edit_unit based on what offset we're currently at.
1954 * @return next_ofs if OK, <0 on error
1956 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1958 int64_t last_ofs = -1, next_ofs = -1;
1959 MXFIndexTable *t = &mxf->index_tables[0];
1961 /* this is called from the OP1a demuxing logic, which means there
1962 * may be no index tables */
1963 if (mxf->nb_index_tables <= 0)
1966 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
1967 while (mxf->current_edit_unit >= 0) {
1968 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1971 if (next_ofs <= last_ofs) {
1972 /* large next_ofs didn't change or current_edit_unit wrapped
1973 * around this fixes the infinite loop on zzuf3.mxf */
1974 av_log(mxf->fc, AV_LOG_ERROR,
1975 "next_ofs didn't change. not deriving packet timestamps\n");
1979 if (next_ofs > current_offset)
1982 last_ofs = next_ofs;
1983 mxf->current_edit_unit++;
1986 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
1987 if (mxf->current_edit_unit < 0)
1993 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1996 MXFContext *mxf = s->priv_data;
1998 while (!url_feof(s->pb)) {
2000 if (klv_read_packet(&klv, s->pb) < 0)
2002 PRINT_KEY(s, "read packet", klv.key);
2003 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2004 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2005 ret = mxf_decrypt_triplet(s, pkt, &klv);
2007 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2008 return AVERROR_INVALIDDATA;
2012 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2013 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2014 int index = mxf_get_stream_index(s, &klv);
2015 int64_t next_ofs, next_klv;
2020 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2024 st = s->streams[index];
2025 track = st->priv_data;
2027 if (s->streams[index]->discard == AVDISCARD_ALL)
2030 next_klv = avio_tell(s->pb) + klv.length;
2031 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2033 if (next_ofs >= 0 && next_klv > next_ofs) {
2034 /* if this check is hit then it's possible OPAtom was treated as OP1a
2035 * truncate the packet since it's probably very large (>2 GiB is common) */
2036 av_log_ask_for_sample(s,
2037 "KLV for edit unit %i extends into next edit unit - OPAtom misinterpreted as OP1a?\n",
2038 mxf->current_edit_unit);
2039 klv.length = next_ofs - avio_tell(s->pb);
2042 /* check for 8 channels AES3 element */
2043 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2044 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2045 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2046 return AVERROR_INVALIDDATA;
2049 ret = av_get_packet(s->pb, pkt, klv.length);
2053 pkt->stream_index = index;
2054 pkt->pos = klv.offset;
2056 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2057 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2058 MXFIndexTable *t = &mxf->index_tables[0];
2060 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2061 pkt->dts = mxf->current_edit_unit + t->first_dts;
2062 pkt->pts = t->ptses[mxf->current_edit_unit];
2063 } else if (track->intra_only) {
2064 /* intra-only -> PTS = EditUnit.
2065 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2066 pkt->pts = mxf->current_edit_unit;
2070 /* seek for truncated packets */
2071 avio_seek(s->pb, next_klv, SEEK_SET);
2076 avio_skip(s->pb, klv.length);
2081 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2083 MXFContext *mxf = s->priv_data;
2085 int64_t ret64, pos, next_pos;
2090 if (mxf->op != OPAtom)
2091 return mxf_read_packet_old(s, pkt);
2093 /* OPAtom - clip wrapped demuxing */
2094 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2096 t = &mxf->index_tables[0];
2098 if (mxf->current_edit_unit >= st->duration)
2101 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2103 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2106 /* compute size by finding the next edit unit or the end of the essence container
2107 * not pretty, but it works */
2108 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2109 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2110 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2111 return AVERROR_INVALIDDATA;
2114 if ((size = next_pos - pos) <= 0) {
2115 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2116 return AVERROR_INVALIDDATA;
2119 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2122 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2125 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2126 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2127 pkt->dts = mxf->current_edit_unit + t->first_dts;
2128 pkt->pts = t->ptses[mxf->current_edit_unit];
2131 pkt->stream_index = 0;
2132 mxf->current_edit_unit += edit_units;
2137 static int mxf_read_close(AVFormatContext *s)
2139 MXFContext *mxf = s->priv_data;
2140 MXFIndexTableSegment *seg;
2143 av_freep(&mxf->packages_refs);
2145 for (i = 0; i < s->nb_streams; i++)
2146 s->streams[i]->priv_data = NULL;
2148 for (i = 0; i < mxf->metadata_sets_count; i++) {
2149 switch (mxf->metadata_sets[i]->type) {
2150 case MultipleDescriptor:
2151 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2154 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2157 case MaterialPackage:
2158 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2160 case IndexTableSegment:
2161 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2162 av_freep(&seg->temporal_offset_entries);
2163 av_freep(&seg->flag_entries);
2164 av_freep(&seg->stream_offset_entries);
2169 av_freep(&mxf->metadata_sets[i]);
2171 av_freep(&mxf->partitions);
2172 av_freep(&mxf->metadata_sets);
2173 av_freep(&mxf->aesc);
2174 av_freep(&mxf->local_tags);
2176 for (i = 0; i < mxf->nb_index_tables; i++) {
2177 av_freep(&mxf->index_tables[i].segments);
2178 av_freep(&mxf->index_tables[i].ptses);
2179 av_freep(&mxf->index_tables[i].fake_index);
2181 av_freep(&mxf->index_tables);
2186 static int mxf_probe(AVProbeData *p) {
2187 uint8_t *bufp = p->buf;
2188 uint8_t *end = p->buf + p->buf_size;
2190 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2193 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2194 end -= sizeof(mxf_header_partition_pack_key);
2195 for (; bufp < end; bufp++) {
2196 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2197 return AVPROBE_SCORE_MAX;
2202 /* rudimentary byte seek */
2203 /* XXX: use MXF Index */
2204 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2206 AVStream *st = s->streams[stream_index];
2208 MXFContext* mxf = s->priv_data;
2213 if (mxf->nb_index_tables <= 0) {
2215 return AVERROR_INVALIDDATA;
2216 if (sample_time < 0)
2218 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2220 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2222 ff_update_cur_dts(s, st, sample_time);
2224 t = &mxf->index_tables[0];
2226 /* clamp above zero, else ff_index_search_timestamp() returns negative
2227 * this also means we allow seeking before the start */
2228 sample_time = FFMAX(sample_time, 0);
2230 if (t->fake_index) {
2231 /* behave as if we have a proper index */
2232 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2235 /* no IndexEntryArray (one or more CBR segments)
2236 * make sure we don't seek past the end */
2237 sample_time = FFMIN(sample_time, st->duration - 1);
2240 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2243 ff_update_cur_dts(s, st, sample_time);
2244 mxf->current_edit_unit = sample_time;
2245 avio_seek(s->pb, seekpos, SEEK_SET);
2250 AVInputFormat ff_mxf_demuxer = {
2252 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2253 .priv_data_size = sizeof(MXFContext),
2254 .read_probe = mxf_probe,
2255 .read_header = mxf_read_header,
2256 .read_packet = mxf_read_packet,
2257 .read_close = mxf_read_close,
2258 .read_seek = mxf_read_seek,