3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
46 #include "libavutil/aes.h"
47 #include "libavutil/mathematics.h"
48 #include "libavcodec/bytestream.h"
70 OPSonyOpt, /* FATE sample, violates the spec in places */
76 MXFPartitionType type;
77 uint64_t previous_partition;
80 int64_t this_partition;
81 int64_t essence_offset; ///< absolute offset of essence
82 int64_t essence_length;
84 int64_t header_byte_count;
85 int64_t index_byte_count;
91 enum MXFMetadataSetType type;
92 UID source_container_ul;
97 enum MXFMetadataSetType type;
98 UID source_package_uid;
99 UID data_definition_ul;
101 int64_t start_position;
103 } MXFStructuralComponent;
107 enum MXFMetadataSetType type;
108 UID data_definition_ul;
109 UID *structural_components_refs;
110 int structural_components_count;
116 enum MXFMetadataSetType type;
117 MXFSequence *sequence; /* mandatory, and only one */
120 uint8_t track_number[4];
121 AVRational edit_rate;
127 enum MXFMetadataSetType type;
128 UID essence_container_ul;
129 UID essence_codec_ul;
130 AVRational sample_rate;
131 AVRational aspect_ratio;
133 int height; /* Field height, not frame height */
134 int frame_layout; /* See MXFFrameLayout enum */
137 unsigned int component_depth;
138 unsigned int horiz_subsampling;
139 unsigned int vert_subsampling;
140 UID *sub_descriptors_refs;
141 int sub_descriptors_count;
145 enum AVPixelFormat pix_fmt;
150 enum MXFMetadataSetType type;
151 int edit_unit_byte_count;
154 AVRational index_edit_rate;
155 uint64_t index_start_position;
156 uint64_t index_duration;
157 int8_t *temporal_offset_entries;
159 uint64_t *stream_offset_entries;
160 int nb_index_entries;
161 } MXFIndexTableSegment;
165 enum MXFMetadataSetType type;
169 MXFDescriptor *descriptor; /* only one */
175 enum MXFMetadataSetType type;
178 /* decoded index table */
182 int nb_ptses; /* number of PTSes or total duration of index */
183 int64_t first_dts; /* DTS = EditUnit + first_dts */
184 int64_t *ptses; /* maps EditUnit -> PTS */
186 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
187 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
191 MXFPartition *partitions;
192 unsigned partitions_count;
196 MXFMetadataSet **metadata_sets;
197 int metadata_sets_count;
201 int local_tags_count;
202 uint64_t footer_partition;
203 KLVPacket current_klv_data;
204 int current_klv_index;
206 MXFPartition *current_partition;
207 int parsing_backward;
208 int64_t last_forward_tell;
209 int last_forward_partition;
210 int current_edit_unit;
212 MXFIndexTable *index_tables;
213 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
216 enum MXFWrappingScheme {
221 /* NOTE: klv_offset is not set (-1) for local keys */
222 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
226 MXFMetadataReadFunc *read;
228 enum MXFMetadataSetType type;
229 } MXFMetadataReadTableEntry;
231 /* partial keys to match */
232 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
233 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
234 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
235 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
236 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
237 /* complete keys to match */
238 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
239 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
240 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
241 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
243 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
245 static int64_t klv_decode_ber_length(AVIOContext *pb)
247 uint64_t size = avio_r8(pb);
248 if (size & 0x80) { /* long form */
249 int bytes_num = size & 0x7f;
250 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
252 return AVERROR_INVALIDDATA;
255 size = size << 8 | avio_r8(pb);
260 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
263 for (i = 0; i < size && !pb->eof_reached; i++) {
267 else if (b != key[i])
273 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
275 if (!mxf_read_sync(pb, mxf_klv_key, 4))
276 return AVERROR_INVALIDDATA;
277 klv->offset = avio_tell(pb) - 4;
278 memcpy(klv->key, mxf_klv_key, 4);
279 avio_read(pb, klv->key + 4, 12);
280 klv->length = klv_decode_ber_length(pb);
281 return klv->length == -1 ? -1 : 0;
284 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
288 for (i = 0; i < s->nb_streams; i++) {
289 MXFTrack *track = s->streams[i]->priv_data;
291 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
294 /* return 0 if only one stream, for OP Atom files with 0 as track number */
295 return s->nb_streams == 1 ? 0 : -1;
298 /* XXX: use AVBitStreamFilter */
299 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
301 const uint8_t *buf_ptr, *end_ptr;
305 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
306 return AVERROR_INVALIDDATA;
307 length = av_get_packet(pb, pkt, length);
310 data_ptr = pkt->data;
311 end_ptr = pkt->data + length;
312 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
313 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
314 for (i = 0; i < st->codec->channels; i++) {
315 uint32_t sample = bytestream_get_le32(&buf_ptr);
316 if (st->codec->bits_per_coded_sample == 24)
317 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
319 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
321 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
323 av_shrink_packet(pkt, data_ptr - pkt->data);
327 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
329 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
330 MXFContext *mxf = s->priv_data;
331 AVIOContext *pb = s->pb;
332 int64_t end = avio_tell(pb) + klv->length;
335 uint64_t plaintext_size;
340 if (!mxf->aesc && s->key && s->keylen == 16) {
341 mxf->aesc = av_aes_alloc();
343 return AVERROR(ENOMEM);
344 av_aes_init(mxf->aesc, s->key, 128, 1);
347 avio_skip(pb, klv_decode_ber_length(pb));
349 klv_decode_ber_length(pb);
350 plaintext_size = avio_rb64(pb);
352 klv_decode_ber_length(pb);
353 avio_read(pb, klv->key, 16);
354 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
355 return AVERROR_INVALIDDATA;
356 index = mxf_get_stream_index(s, klv);
358 return AVERROR_INVALIDDATA;
360 klv_decode_ber_length(pb);
361 orig_size = avio_rb64(pb);
362 if (orig_size < plaintext_size)
363 return AVERROR_INVALIDDATA;
365 size = klv_decode_ber_length(pb);
366 if (size < 32 || size - 32 < orig_size)
367 return AVERROR_INVALIDDATA;
368 avio_read(pb, ivec, 16);
369 avio_read(pb, tmpbuf, 16);
371 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
372 if (memcmp(tmpbuf, checkv, 16))
373 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
375 size = av_get_packet(pb, pkt, size);
378 else if (size < plaintext_size)
379 return AVERROR_INVALIDDATA;
380 size -= plaintext_size;
382 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
383 &pkt->data[plaintext_size], size >> 4, ivec, 1);
384 av_shrink_packet(pkt, orig_size);
385 pkt->stream_index = index;
386 avio_skip(pb, end - avio_tell(pb));
390 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
392 MXFContext *mxf = arg;
393 int item_num = avio_rb32(pb);
394 int item_len = avio_rb32(pb);
396 if (item_len != 18) {
397 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
398 return AVERROR_PATCHWELCOME;
400 if (item_num > UINT_MAX / item_len)
401 return AVERROR_INVALIDDATA;
402 mxf->local_tags_count = item_num;
403 mxf->local_tags = av_malloc(item_num*item_len);
404 if (!mxf->local_tags)
405 return AVERROR(ENOMEM);
406 avio_read(pb, mxf->local_tags, item_num*item_len);
410 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
412 MXFContext *mxf = arg;
413 MXFPartition *partition;
415 uint64_t footer_partition;
416 uint32_t nb_essence_containers;
419 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
420 return AVERROR(ENOMEM);
422 if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
423 sizeof(*mxf->partitions))) < 0) {
424 mxf->partitions_count = 0;
428 if (mxf->parsing_backward) {
429 /* insert the new partition pack in the middle
430 * this makes the entries in mxf->partitions sorted by offset */
431 memmove(&mxf->partitions[mxf->last_forward_partition+1],
432 &mxf->partitions[mxf->last_forward_partition],
433 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
434 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
436 mxf->last_forward_partition++;
437 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
440 memset(partition, 0, sizeof(*partition));
441 mxf->partitions_count++;
442 partition->pack_length = avio_tell(pb) - klv_offset + size;
446 partition->type = Header;
449 partition->type = BodyPartition;
452 partition->type = Footer;
455 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
456 return AVERROR_INVALIDDATA;
459 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
460 partition->closed = partition->type == Footer || !(uid[14] & 1);
461 partition->complete = uid[14] > 2;
463 partition->kag_size = avio_rb32(pb);
464 partition->this_partition = avio_rb64(pb);
465 partition->previous_partition = avio_rb64(pb);
466 footer_partition = avio_rb64(pb);
467 partition->header_byte_count = avio_rb64(pb);
468 partition->index_byte_count = avio_rb64(pb);
469 partition->index_sid = avio_rb32(pb);
471 partition->body_sid = avio_rb32(pb);
472 avio_read(pb, op, sizeof(UID));
473 nb_essence_containers = avio_rb32(pb);
475 /* some files don'thave FooterPartition set in every partition */
476 if (footer_partition) {
477 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
478 av_log(mxf->fc, AV_LOG_ERROR,
479 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
480 mxf->footer_partition, footer_partition);
482 mxf->footer_partition = footer_partition;
487 "PartitionPack: ThisPartition = 0x%"PRIX64
488 ", PreviousPartition = 0x%"PRIX64", "
489 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
490 partition->this_partition,
491 partition->previous_partition, footer_partition,
492 partition->index_sid, partition->body_sid);
494 /* sanity check PreviousPartition if set */
495 if (partition->previous_partition &&
496 mxf->run_in + partition->previous_partition >= klv_offset) {
497 av_log(mxf->fc, AV_LOG_ERROR,
498 "PreviousPartition points to this partition or forward\n");
499 return AVERROR_INVALIDDATA;
502 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
503 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
504 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
505 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
506 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
507 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
508 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
509 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
510 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
511 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
512 else if (op[12] == 0x10) {
513 /* SMPTE 390m: "There shall be exactly one essence container"
514 * The following block deals with files that violate this, namely:
515 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
516 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
517 if (nb_essence_containers != 1) {
518 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
522 av_log(mxf->fc, AV_LOG_WARNING,
523 "\"OPAtom\" with %u ECs - assuming %s\n",
524 nb_essence_containers,
525 op == OP1a ? "OP1a" : "OPAtom");
531 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
535 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
536 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
538 if (mxf->op == OPSonyOpt)
539 partition->kag_size = 512;
541 partition->kag_size = 1;
543 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
549 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
553 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
554 return AVERROR(ENOMEM);
555 if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
556 sizeof(*mxf->metadata_sets))) < 0) {
557 mxf->metadata_sets_count = 0;
560 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
561 mxf->metadata_sets_count++;
565 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
567 MXFCryptoContext *cryptocontext = arg;
569 return AVERROR_INVALIDDATA;
570 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
571 avio_read(pb, cryptocontext->source_container_ul, 16);
575 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
577 MXFContext *mxf = arg;
580 mxf->packages_count = avio_rb32(pb);
581 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
582 return AVERROR_INVALIDDATA;
583 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
584 if (!mxf->packages_refs)
585 return AVERROR(ENOMEM);
586 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
587 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
593 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
595 MXFStructuralComponent *source_clip = arg;
598 source_clip->duration = avio_rb64(pb);
601 source_clip->start_position = avio_rb64(pb);
604 /* UMID, only get last 16 bytes */
606 avio_read(pb, source_clip->source_package_uid, 16);
609 source_clip->source_track_id = avio_rb32(pb);
615 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
617 MXFPackage *package = arg;
620 package->tracks_count = avio_rb32(pb);
621 if (package->tracks_count >= UINT_MAX / sizeof(UID))
622 return AVERROR_INVALIDDATA;
623 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
624 if (!package->tracks_refs)
625 return AVERROR(ENOMEM);
626 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
627 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
633 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
635 MXFTrack *track = arg;
638 track->track_id = avio_rb32(pb);
641 avio_read(pb, track->track_number, 4);
644 track->edit_rate.num = avio_rb32(pb);
645 track->edit_rate.den = avio_rb32(pb);
648 avio_read(pb, track->sequence_ref, 16);
654 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
656 MXFSequence *sequence = arg;
659 sequence->duration = avio_rb64(pb);
662 avio_read(pb, sequence->data_definition_ul, 16);
665 sequence->structural_components_count = avio_rb32(pb);
666 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
667 return AVERROR_INVALIDDATA;
668 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
669 if (!sequence->structural_components_refs)
670 return AVERROR(ENOMEM);
671 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
672 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
678 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
680 MXFPackage *package = arg;
683 package->tracks_count = avio_rb32(pb);
684 if (package->tracks_count >= UINT_MAX / sizeof(UID))
685 return AVERROR_INVALIDDATA;
686 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
687 if (!package->tracks_refs)
688 return AVERROR(ENOMEM);
689 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
690 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
693 /* UMID, only get last 16 bytes */
695 avio_read(pb, package->package_uid, 16);
698 avio_read(pb, package->descriptor_ref, 16);
704 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
708 segment->nb_index_entries = avio_rb32(pb);
709 if (!segment->nb_index_entries)
711 else if (segment->nb_index_entries < 0 ||
712 segment->nb_index_entries >
713 (INT_MAX / sizeof(*segment->stream_offset_entries)))
714 return AVERROR(ENOMEM);
716 length = avio_rb32(pb);
718 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
719 sizeof(*segment->temporal_offset_entries));
720 segment->flag_entries = av_mallocz(segment->nb_index_entries *
721 sizeof(*segment->flag_entries));
722 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
723 sizeof(*segment->stream_offset_entries));
725 if (!segment->flag_entries || !segment->stream_offset_entries ||
726 !segment->temporal_offset_entries) {
727 av_freep(&segment->flag_entries);
728 av_freep(&segment->stream_offset_entries);
729 av_freep(&segment->temporal_offset_entries);
730 return AVERROR(ENOMEM);
733 for (i = 0; i < segment->nb_index_entries; i++) {
734 segment->temporal_offset_entries[i] = avio_r8(pb);
735 avio_r8(pb); /* KeyFrameOffset */
736 segment->flag_entries[i] = avio_r8(pb);
737 segment->stream_offset_entries[i] = avio_rb64(pb);
738 avio_skip(pb, length - 11);
743 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
745 MXFIndexTableSegment *segment = arg;
748 segment->edit_unit_byte_count = avio_rb32(pb);
749 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
752 segment->index_sid = avio_rb32(pb);
753 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
756 segment->body_sid = avio_rb32(pb);
757 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
760 av_dlog(NULL, "IndexEntryArray found\n");
761 return mxf_read_index_entry_array(pb, segment);
763 segment->index_edit_rate.num = avio_rb32(pb);
764 segment->index_edit_rate.den = avio_rb32(pb);
765 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
766 segment->index_edit_rate.den);
769 segment->index_start_position = avio_rb64(pb);
770 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
773 segment->index_duration = avio_rb64(pb);
774 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
780 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
782 int code, value, ofs = 0;
783 char layout[16] = {0};
788 av_dlog(NULL, "pixel layout: code %#x\n", code);
791 layout[ofs++] = code;
792 layout[ofs++] = value;
794 } while (code != 0); /* SMPTE 377M E.2.46 */
796 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
799 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
801 MXFDescriptor *descriptor = arg;
802 descriptor->pix_fmt = AV_PIX_FMT_NONE;
805 descriptor->sub_descriptors_count = avio_rb32(pb);
806 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
807 return AVERROR_INVALIDDATA;
808 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
809 if (!descriptor->sub_descriptors_refs)
810 return AVERROR(ENOMEM);
811 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
812 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
815 avio_read(pb, descriptor->essence_container_ul, 16);
818 descriptor->linked_track_id = avio_rb32(pb);
820 case 0x3201: /* PictureEssenceCoding */
821 avio_read(pb, descriptor->essence_codec_ul, 16);
824 descriptor->width = avio_rb32(pb);
827 descriptor->height = avio_rb32(pb);
830 descriptor->frame_layout = avio_r8(pb);
833 descriptor->aspect_ratio.num = avio_rb32(pb);
834 descriptor->aspect_ratio.den = avio_rb32(pb);
837 descriptor->component_depth = avio_rb32(pb);
840 descriptor->horiz_subsampling = avio_rb32(pb);
843 descriptor->vert_subsampling = avio_rb32(pb);
846 descriptor->sample_rate.num = avio_rb32(pb);
847 descriptor->sample_rate.den = avio_rb32(pb);
849 case 0x3D06: /* SoundEssenceCompression */
850 avio_read(pb, descriptor->essence_codec_ul, 16);
853 descriptor->channels = avio_rb32(pb);
856 descriptor->bits_per_sample = avio_rb32(pb);
859 mxf_read_pixel_layout(pb, descriptor);
862 /* Private uid used by SONY C0023S01.mxf */
863 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
864 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
865 if (!descriptor->extradata)
866 return AVERROR(ENOMEM);
867 descriptor->extradata_size = size;
868 avio_read(pb, descriptor->extradata, size);
876 * Match an uid independently of the version byte and up to len common bytes
879 static int mxf_match_uid(const UID key, const UID uid, int len)
882 for (i = 0; i < len; i++) {
883 if (i != 7 && key[i] != uid[i])
889 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
891 while (uls->uid[0]) {
892 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
899 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
905 for (i = 0; i < mxf->metadata_sets_count; i++) {
906 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
907 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
908 return mxf->metadata_sets[i];
914 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
915 // video essence container uls
916 { { 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 */
917 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
918 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
919 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
922 /* EC ULs for intra-only formats */
923 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
924 { { 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 */
925 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
928 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
929 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
930 { { 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 */
931 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
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 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
959 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
960 if (!*sorted_segments || !unsorted_segments) {
961 av_freep(sorted_segments);
962 av_free(unsorted_segments);
963 return AVERROR(ENOMEM);
966 for (i = j = 0; i < mxf->metadata_sets_count; i++)
967 if (mxf->metadata_sets[i]->type == IndexTableSegment)
968 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
970 *nb_sorted_segments = 0;
972 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
973 for (i = 0; i < nb_segments; i++) {
974 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
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.
982 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
983 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
985 best_body_sid = s->body_sid;
986 best_index_sid = s->index_sid;
987 best_index_start = s->index_start_position;
991 /* no suitable entry found -> we're done */
995 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
996 last_body_sid = best_body_sid;
997 last_index_sid = best_index_sid;
998 last_index_start = best_index_start;
1001 av_free(unsorted_segments);
1007 * Computes the absolute file offset of the given essence container offset
1009 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1012 int64_t offset_in = offset; /* for logging */
1014 for (x = 0; x < mxf->partitions_count; x++) {
1015 MXFPartition *p = &mxf->partitions[x];
1017 if (p->body_sid != body_sid)
1020 if (offset < p->essence_length || !p->essence_length) {
1021 *offset_out = p->essence_offset + offset;
1025 offset -= p->essence_length;
1028 av_log(mxf->fc, AV_LOG_ERROR,
1029 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1030 offset_in, body_sid);
1032 return AVERROR_INVALIDDATA;
1036 * Returns the end position of the essence container with given BodySID, or zero if unknown
1038 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1043 for (x = 0; x < mxf->partitions_count; x++) {
1044 MXFPartition *p = &mxf->partitions[x];
1046 if (p->body_sid != body_sid)
1049 if (!p->essence_length)
1052 ret = p->essence_offset + p->essence_length;
1058 /* EditUnit -> absolute offset */
1059 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)
1062 int64_t offset_temp = 0;
1064 for (i = 0; i < index_table->nb_segments; i++) {
1065 MXFIndexTableSegment *s = index_table->segments[i];
1067 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1069 if (edit_unit < s->index_start_position + s->index_duration) {
1070 int64_t index = edit_unit - s->index_start_position;
1072 if (s->edit_unit_byte_count)
1073 offset_temp += s->edit_unit_byte_count * index;
1074 else if (s->nb_index_entries) {
1075 if (s->nb_index_entries == 2 * s->index_duration + 1)
1076 index *= 2; /* Avid index */
1078 if (index < 0 || index >= s->nb_index_entries) {
1079 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1080 index_table->index_sid, s->index_start_position);
1081 return AVERROR_INVALIDDATA;
1084 offset_temp = s->stream_offset_entries[index];
1086 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1087 index_table->index_sid, s->index_start_position);
1088 return AVERROR_INVALIDDATA;
1092 *edit_unit_out = edit_unit;
1094 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1096 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1097 offset_temp += s->edit_unit_byte_count * s->index_duration;
1102 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);
1104 return AVERROR_INVALIDDATA;
1107 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1110 int8_t max_temporal_offset = -128;
1112 /* first compute how many entries we have */
1113 for (i = 0; i < index_table->nb_segments; i++) {
1114 MXFIndexTableSegment *s = index_table->segments[i];
1116 if (!s->nb_index_entries) {
1117 index_table->nb_ptses = 0;
1118 return 0; /* no TemporalOffsets */
1121 index_table->nb_ptses += s->index_duration;
1124 /* paranoid check */
1125 if (index_table->nb_ptses <= 0)
1128 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1129 return AVERROR(ENOMEM);
1131 index_table->ptses = av_mallocz(index_table->nb_ptses *
1133 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1134 sizeof(AVIndexEntry));
1135 if (!index_table->ptses || !index_table->fake_index) {
1136 av_freep(&index_table->ptses);
1137 return AVERROR(ENOMEM);
1140 /* we may have a few bad TemporalOffsets
1141 * make sure the corresponding PTSes don't have the bogus value 0 */
1142 for (x = 0; x < index_table->nb_ptses; x++)
1143 index_table->ptses[x] = AV_NOPTS_VALUE;
1157 * We want to transform it into this:
1168 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1169 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1170 * The latter makes DTS <= PTS.
1172 for (i = x = 0; i < index_table->nb_segments; i++) {
1173 MXFIndexTableSegment *s = index_table->segments[i];
1174 int index_delta = 1;
1175 int n = s->nb_index_entries;
1177 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1178 index_delta = 2; /* Avid index */
1179 /* ignore the last entry - it's the size of the essence container */
1183 for (j = 0; j < n; j += index_delta, x++) {
1184 int offset = s->temporal_offset_entries[j] / index_delta;
1185 int index = x + offset;
1187 if (x >= index_table->nb_ptses) {
1188 av_log(mxf->fc, AV_LOG_ERROR,
1189 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1190 s->nb_index_entries, s->index_duration);
1194 index_table->fake_index[x].timestamp = x;
1195 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1197 if (index < 0 || index >= index_table->nb_ptses) {
1198 av_log(mxf->fc, AV_LOG_ERROR,
1199 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1204 index_table->ptses[index] = x;
1205 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1209 index_table->first_dts = -max_temporal_offset;
1215 * Sorts and collects index table segments into index tables.
1216 * Also computes PTSes if possible.
1218 static int mxf_compute_index_tables(MXFContext *mxf)
1220 int i, j, k, ret, nb_sorted_segments;
1221 MXFIndexTableSegment **sorted_segments = NULL;
1223 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1224 nb_sorted_segments <= 0) {
1225 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1229 /* sanity check and count unique BodySIDs/IndexSIDs */
1230 for (i = 0; i < nb_sorted_segments; i++) {
1231 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1232 mxf->nb_index_tables++;
1233 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1234 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1235 ret = AVERROR_INVALIDDATA;
1236 goto finish_decoding_index;
1240 if (mxf->nb_index_tables > INT_MAX / sizeof(MXFIndexTable) ||
1241 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1242 sizeof(MXFIndexTable)))) {
1243 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1244 ret = AVERROR(ENOMEM);
1245 goto finish_decoding_index;
1248 /* distribute sorted segments to index tables */
1249 for (i = j = 0; i < nb_sorted_segments; i++) {
1250 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1255 mxf->index_tables[j].nb_segments++;
1258 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1259 MXFIndexTable *t = &mxf->index_tables[j];
1261 if (t->nb_segments >
1262 (INT_MAX / sizeof(MXFIndexTableSegment *)) ||
1263 !(t->segments = av_mallocz(t->nb_segments *
1264 sizeof(MXFIndexTableSegment*)))) {
1265 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1266 " pointer array\n");
1267 ret = AVERROR(ENOMEM);
1268 goto finish_decoding_index;
1271 if (sorted_segments[i]->index_start_position)
1272 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1273 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1275 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1276 t->index_sid = sorted_segments[i]->index_sid;
1277 t->body_sid = sorted_segments[i]->body_sid;
1279 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1280 goto finish_decoding_index;
1282 /* fix zero IndexDurations */
1283 for (k = 0; k < t->nb_segments; k++) {
1284 if (t->segments[k]->index_duration)
1287 if (t->nb_segments > 1)
1288 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1291 if (mxf->fc->nb_streams <= 0) {
1292 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1296 /* assume the first stream's duration is reasonable
1297 * leave index_duration = 0 on further segments in case we have any (unlikely)
1299 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1305 finish_decoding_index:
1306 av_free(sorted_segments);
1310 static int mxf_is_intra_only(MXFDescriptor *d)
1312 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1313 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1314 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1315 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1318 static int mxf_parse_structural_metadata(MXFContext *mxf)
1320 MXFPackage *material_package = NULL;
1321 MXFPackage *temp_package = NULL;
1324 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1325 /* TODO: handle multiple material packages (OP3x) */
1326 for (i = 0; i < mxf->packages_count; i++) {
1327 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1328 if (material_package) break;
1330 if (!material_package) {
1331 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1332 return AVERROR_INVALIDDATA;
1335 for (i = 0; i < material_package->tracks_count; i++) {
1336 MXFPackage *source_package = NULL;
1337 MXFTrack *material_track = NULL;
1338 MXFTrack *source_track = NULL;
1339 MXFTrack *temp_track = NULL;
1340 MXFDescriptor *descriptor = NULL;
1341 MXFStructuralComponent *component = 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;
1348 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1349 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1353 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1354 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1358 /* TODO: handle multiple source clips */
1359 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1360 /* TODO: handle timecode component */
1361 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1365 for (k = 0; k < mxf->packages_count; k++) {
1366 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1369 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1370 source_package = temp_package;
1374 if (!source_package) {
1375 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1378 for (k = 0; k < source_package->tracks_count; k++) {
1379 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1380 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1381 ret = AVERROR_INVALIDDATA;
1384 if (temp_track->track_id == component->source_track_id) {
1385 source_track = temp_track;
1389 if (!source_track) {
1390 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1394 if (!source_track || !component)
1397 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1398 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1399 ret = AVERROR_INVALIDDATA;
1403 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1404 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1405 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1406 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1410 st = avformat_new_stream(mxf->fc, NULL);
1412 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1413 ret = AVERROR(ENOMEM);
1416 st->id = source_track->track_id;
1417 st->priv_data = source_track;
1418 st->duration = component->duration;
1419 if (st->duration == -1)
1420 st->duration = AV_NOPTS_VALUE;
1421 st->start_time = component->start_position;
1422 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1424 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1425 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1426 st->codec->codec_type = codec_ul->id;
1428 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1429 if (source_package->descriptor) {
1430 if (source_package->descriptor->type == MultipleDescriptor) {
1431 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1432 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1434 if (!sub_descriptor) {
1435 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1438 if (sub_descriptor->linked_track_id == source_track->track_id) {
1439 descriptor = sub_descriptor;
1443 } else if (source_package->descriptor->type == Descriptor)
1444 descriptor = source_package->descriptor;
1447 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1450 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1451 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1452 essence_container_ul = &descriptor->essence_container_ul;
1453 /* HACK: replacing the original key with mxf_encrypted_essence_container
1454 * is not allowed according to s429-6, try to find correct information anyway */
1455 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1456 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1457 for (k = 0; k < mxf->metadata_sets_count; k++) {
1458 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1459 if (metadata->type == CryptoContext) {
1460 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1466 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1467 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1468 st->codec->codec_id = codec_ul->id;
1470 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1471 source_track->intra_only = mxf_is_intra_only(descriptor);
1472 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1473 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1474 st->codec->codec_id = container_ul->id;
1475 st->codec->width = descriptor->width;
1476 /* Field height, not frame height */
1477 st->codec->height = descriptor->height;
1478 switch (descriptor->frame_layout) {
1479 case SegmentedFrame:
1480 /* This one is a weird layout I don't fully understand. */
1481 av_log(mxf->fc, AV_LOG_INFO,
1482 "SegmentedFrame layout isn't currently supported\n");
1487 /* Every other line is stored and needs to be duplicated. */
1488 av_log(mxf->fc, AV_LOG_INFO,
1489 "OneField frame layout isn't currently supported\n");
1491 /* The correct thing to do here is fall through, but by
1492 * breaking we might be able to decode some streams at half
1493 * the vertical resolution, rather than not al all.
1494 * It's also for compatibility with the old behavior. */
1495 case SeparateFields:
1497 /* Turn field height into frame height. */
1498 st->codec->height *= 2;
1500 av_log(mxf->fc, AV_LOG_INFO,
1501 "Unknown frame layout type: %d\n",
1502 descriptor->frame_layout);
1504 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1505 st->codec->pix_fmt = descriptor->pix_fmt;
1506 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1507 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1508 &descriptor->essence_codec_ul);
1509 st->codec->pix_fmt = pix_fmt_ul->id;
1510 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1511 /* support files created before RP224v10 by defaulting to UYVY422
1512 if subsampling is 4:2:2 and component depth is 8-bit */
1513 if (descriptor->horiz_subsampling == 2 &&
1514 descriptor->vert_subsampling == 1 &&
1515 descriptor->component_depth == 8) {
1516 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1521 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1522 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1523 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1524 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1525 st->codec->codec_id = container_ul->id;
1526 st->codec->channels = descriptor->channels;
1527 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1529 if (descriptor->sample_rate.den > 0) {
1530 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1531 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1533 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1534 "found for stream #%d, time base forced to 1/48000\n",
1535 descriptor->sample_rate.num, descriptor->sample_rate.den,
1537 avpriv_set_pts_info(st, 64, 1, 48000);
1540 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1541 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1542 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1543 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1544 else if (descriptor->bits_per_sample == 32)
1545 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1546 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1547 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1548 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1549 else if (descriptor->bits_per_sample == 32)
1550 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1551 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1552 st->need_parsing = AVSTREAM_PARSE_FULL;
1555 if (descriptor->extradata) {
1556 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1557 if (st->codec->extradata)
1558 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1559 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1560 ret = ff_generate_avci_extradata(st);
1564 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1565 /* TODO: decode timestamps */
1566 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1575 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1576 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1577 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1578 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1579 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1580 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1591 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1593 { { 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 */
1594 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1596 { { 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 */
1597 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1598 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1599 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1600 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1601 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1602 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1603 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1606 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1608 AVIOContext *pb = mxf->fc->pb;
1609 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1610 uint64_t klv_end = avio_tell(pb) + klv->length;
1613 return AVERROR(ENOMEM);
1614 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1616 int tag = avio_rb16(pb);
1617 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1618 uint64_t next = avio_tell(pb) + size;
1621 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1622 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1623 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1626 if (tag > 0x7FFF) { /* dynamic tag */
1628 for (i = 0; i < mxf->local_tags_count; i++) {
1629 int local_tag = AV_RB16(mxf->local_tags+i*18);
1630 if (local_tag == tag) {
1631 memcpy(uid, mxf->local_tags+i*18+2, 16);
1632 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1633 PRINT_KEY(mxf->fc, "uid", uid);
1637 if (ctx_size && tag == 0x3C0A)
1638 avio_read(pb, ctx->uid, 16);
1639 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1642 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1643 * it extending past the end of the KLV though (zzuf5.mxf). */
1644 if (avio_tell(pb) > klv_end) {
1645 av_log(mxf->fc, AV_LOG_ERROR,
1646 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1648 return AVERROR_INVALIDDATA;
1649 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1650 avio_seek(pb, next, SEEK_SET);
1652 if (ctx_size) ctx->type = type;
1653 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1657 * Seeks to the previous partition, if possible
1658 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1660 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1662 AVIOContext *pb = mxf->fc->pb;
1664 if (!mxf->current_partition ||
1665 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1666 return 0; /* we've parsed all partitions */
1668 /* seek to previous partition */
1669 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1670 mxf->current_partition = NULL;
1672 av_dlog(mxf->fc, "seeking to previous partition\n");
1678 * Called when essence is encountered
1679 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1681 static int mxf_parse_handle_essence(MXFContext *mxf)
1683 AVIOContext *pb = mxf->fc->pb;
1686 if (mxf->parsing_backward) {
1687 return mxf_seek_to_previous_partition(mxf);
1689 if (!mxf->footer_partition) {
1690 av_dlog(mxf->fc, "no footer\n");
1694 av_dlog(mxf->fc, "seeking to footer\n");
1696 /* remember where we were so we don't end up seeking further back than this */
1697 mxf->last_forward_tell = avio_tell(pb);
1699 if (!pb->seekable) {
1700 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1704 /* seek to footer partition and parse backward */
1705 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1706 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1707 mxf->run_in + mxf->footer_partition, ret);
1711 mxf->current_partition = NULL;
1712 mxf->parsing_backward = 1;
1719 * Called when the next partition or EOF is encountered
1720 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1722 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1724 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1728 * Figure out the proper offset and length of the essence container
1731 static void mxf_compute_essence_containers(MXFContext *mxf)
1735 /* everything is already correct */
1736 if (mxf->op == OPAtom)
1739 for (x = 0; x < mxf->partitions_count; x++) {
1740 MXFPartition *p = &mxf->partitions[x];
1743 continue; /* BodySID == 0 -> no essence */
1745 if (x >= mxf->partitions_count - 1)
1746 break; /* last partition - can't compute length (and we don't need to) */
1748 /* essence container spans to the next partition */
1749 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1751 if (p->essence_length < 0) {
1752 /* next ThisPartition < essence_offset */
1753 p->essence_length = 0;
1754 av_log(mxf->fc, AV_LOG_ERROR,
1755 "partition %i: bad ThisPartition = %"PRIX64"\n",
1756 x+1, mxf->partitions[x+1].this_partition);
1761 static int64_t round_to_kag(int64_t position, int kag_size)
1763 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1764 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1765 int64_t ret = (position / kag_size) * kag_size;
1766 return ret == position ? ret : ret + kag_size;
1769 static inline void compute_partition_essence_offset(AVFormatContext *s,
1773 MXFPartition *cur_part = mxf->current_partition;
1774 /* for OP1a we compute essence_offset
1775 * for OPAtom we point essence_offset after the KL
1776 * (usually op1a_essence_offset + 20 or 25)
1777 * TODO: for OP1a we could eliminate this entire if statement, always
1778 * stopping parsing at op1a_essence_offset
1779 * for OPAtom we still need the actual essence_offset though
1780 * (the KL's length can vary)
1782 int64_t op1a_essence_offset =
1783 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1784 cur_part->kag_size) +
1785 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1786 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1788 if (mxf->op == OPAtom) {
1789 /* point essence_offset to the actual data
1790 * OPAtom has all the essence in one big KLV
1792 cur_part->essence_offset = avio_tell(s->pb);
1793 cur_part->essence_length = klv->length;
1795 /* NOTE: op1a_essence_offset may be less than to klv.offset
1797 cur_part->essence_offset = op1a_essence_offset;
1801 static int is_pcm(enum AVCodecID codec_id)
1803 /* we only care about "normal" PCM codecs until we get samples */
1804 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1808 * Deal with the case where for some audio atoms EditUnitByteCount is
1809 * very small (2, 4..). In those cases we should read more than one
1810 * sample per call to mxf_read_packet().
1812 static void mxf_handle_small_eubc(AVFormatContext *s)
1814 MXFContext *mxf = s->priv_data;
1816 /* assuming non-OPAtom == frame wrapped
1817 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1818 if (mxf->op != OPAtom)
1821 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1822 if (s->nb_streams != 1 ||
1823 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1824 !is_pcm(s->streams[0]->codec->codec_id) ||
1825 mxf->nb_index_tables != 1 ||
1826 mxf->index_tables[0].nb_segments != 1 ||
1827 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1830 /* arbitrarily default to 48 kHz PAL audio frame size */
1831 /* TODO: We could compute this from the ratio between the audio
1832 * and video edit rates for 48 kHz NTSC we could use the
1833 * 1802-1802-1802-1802-1801 pattern. */
1834 mxf->edit_units_per_packet = 1920;
1837 static int mxf_read_header(AVFormatContext *s)
1839 MXFContext *mxf = s->priv_data;
1841 int64_t essence_offset = 0;
1844 mxf->last_forward_tell = INT64_MAX;
1845 mxf->edit_units_per_packet = 1;
1847 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1848 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1849 return AVERROR_INVALIDDATA;
1851 avio_seek(s->pb, -14, SEEK_CUR);
1853 mxf->run_in = avio_tell(s->pb);
1855 while (!s->pb->eof_reached) {
1856 const MXFMetadataReadTableEntry *metadata;
1858 if (klv_read_packet(&klv, s->pb) < 0) {
1859 /* EOF - seek to previous partition or stop */
1860 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1866 PRINT_KEY(s, "read header", klv.key);
1867 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1868 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1869 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1870 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1871 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1873 if (!mxf->current_partition) {
1874 av_log(mxf->fc, AV_LOG_ERROR,
1875 "found essence prior to first PartitionPack\n");
1876 return AVERROR_INVALIDDATA;
1879 if (!mxf->current_partition->essence_offset) {
1880 compute_partition_essence_offset(s, mxf, &klv);
1883 if (!essence_offset)
1884 essence_offset = klv.offset;
1886 /* seek to footer, previous partition or stop */
1887 if (mxf_parse_handle_essence(mxf) <= 0)
1890 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1891 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1892 /* next partition pack - keep going, seek to previous partition or stop */
1893 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1895 else if (mxf->parsing_backward)
1897 /* we're still parsing forward. proceed to parsing this partition pack */
1900 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1901 if (IS_KLV_KEY(klv.key, metadata->key)) {
1903 if (klv.key[5] == 0x53) {
1904 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1906 uint64_t next = avio_tell(s->pb) + klv.length;
1907 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1909 /* only seek forward, else this can loop for a long time */
1910 if (avio_tell(s->pb) > next) {
1911 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1913 return AVERROR_INVALIDDATA;
1916 avio_seek(s->pb, next, SEEK_SET);
1919 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1925 if (!metadata->read)
1926 avio_skip(s->pb, klv.length);
1928 /* FIXME avoid seek */
1929 if (!essence_offset) {
1930 av_log(s, AV_LOG_ERROR, "no essence\n");
1931 return AVERROR_INVALIDDATA;
1933 avio_seek(s->pb, essence_offset, SEEK_SET);
1935 mxf_compute_essence_containers(mxf);
1937 /* we need to do this before computing the index tables
1938 * to be able to fill in zero IndexDurations with st->duration */
1939 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1942 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1945 if (mxf->nb_index_tables > 1) {
1946 /* TODO: look up which IndexSID to use via EssenceContainerData */
1947 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1948 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1949 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1950 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1951 return AVERROR_INVALIDDATA;
1954 mxf_handle_small_eubc(s);
1960 * Sets mxf->current_edit_unit based on what offset we're currently at.
1961 * @return next_ofs if OK, <0 on error
1963 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1965 int64_t last_ofs = -1, next_ofs = -1;
1966 MXFIndexTable *t = &mxf->index_tables[0];
1968 /* this is called from the OP1a demuxing logic, which means there
1969 * may be no index tables */
1970 if (mxf->nb_index_tables <= 0)
1973 /* find mxf->current_edit_unit so that the next edit unit starts ahead
1974 * of current_offset */
1975 while (mxf->current_edit_unit >= 0) {
1976 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
1977 NULL, &next_ofs, 0) < 0)
1980 if (next_ofs <= last_ofs) {
1981 /* large next_ofs didn't change or current_edit_unit wrapped
1982 * around this fixes the infinite loop on zzuf3.mxf */
1983 av_log(mxf->fc, AV_LOG_ERROR,
1984 "next_ofs didn't change. not deriving packet timestamps\n");
1988 if (next_ofs > current_offset)
1991 last_ofs = next_ofs;
1992 mxf->current_edit_unit++;
1995 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
1996 * may lack IndexEntryArrays */
1997 if (mxf->current_edit_unit < 0)
2003 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2006 MXFContext *mxf = s->priv_data;
2008 while (!s->pb->eof_reached) {
2009 if (klv_read_packet(&klv, s->pb) < 0)
2011 PRINT_KEY(s, "read packet", klv.key);
2012 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2013 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2014 int res = mxf_decrypt_triplet(s, pkt, &klv);
2016 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2021 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2022 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2023 int index = mxf_get_stream_index(s, &klv);
2024 int64_t next_ofs, next_klv;
2029 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2033 st = s->streams[index];
2034 track = st->priv_data;
2036 if (s->streams[index]->discard == AVDISCARD_ALL)
2039 next_klv = avio_tell(s->pb) + klv.length;
2040 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2042 if (next_ofs >= 0 && next_klv > next_ofs) {
2043 /* if this check is hit then it's possible OPAtom was treated
2044 * as OP1a truncate the packet since it's probably very large
2045 * (>2 GiB is common) */
2046 avpriv_request_sample(s,
2047 "OPAtom misinterpreted as OP1a?"
2048 "KLV for edit unit %i extending into "
2050 mxf->current_edit_unit);
2051 klv.length = next_ofs - avio_tell(s->pb);
2054 /* check for 8 channels AES3 element */
2055 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2056 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2057 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2061 int ret = av_get_packet(s->pb, pkt, klv.length);
2065 pkt->stream_index = index;
2066 pkt->pos = klv.offset;
2068 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2069 /* mxf->current_edit_unit good - see if we have an
2070 * index table to derive timestamps from */
2071 MXFIndexTable *t = &mxf->index_tables[0];
2073 if (mxf->nb_index_tables >= 1 &&
2074 mxf->current_edit_unit < t->nb_ptses) {
2075 pkt->dts = mxf->current_edit_unit + t->first_dts;
2076 pkt->pts = t->ptses[mxf->current_edit_unit];
2077 } else if (track->intra_only) {
2078 /* intra-only -> PTS = EditUnit.
2079 * let utils.c figure out DTS since it can be
2080 * < PTS if low_delay = 0 (Sony IMX30) */
2081 pkt->pts = mxf->current_edit_unit;
2085 /* seek for truncated packets */
2086 avio_seek(s->pb, next_klv, SEEK_SET);
2091 avio_skip(s->pb, klv.length);
2096 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2098 MXFContext *mxf = s->priv_data;
2100 int64_t ret64, pos, next_pos;
2105 if (mxf->op != OPAtom)
2106 return mxf_read_packet_old(s, pkt);
2108 /* OPAtom - clip wrapped demuxing */
2109 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2111 t = &mxf->index_tables[0];
2113 if (mxf->current_edit_unit >= st->duration)
2116 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2118 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2121 /* compute size by finding the next edit unit or the end of the essence container
2122 * not pretty, but it works */
2123 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2124 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2125 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2126 return AVERROR_INVALIDDATA;
2129 if ((size = next_pos - pos) <= 0) {
2130 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2131 return AVERROR_INVALIDDATA;
2134 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2137 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2138 return ret < 0 ? ret : AVERROR_EOF;
2140 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2141 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2142 pkt->dts = mxf->current_edit_unit + t->first_dts;
2143 pkt->pts = t->ptses[mxf->current_edit_unit];
2146 pkt->stream_index = 0;
2147 mxf->current_edit_unit += edit_units;
2153 static int mxf_read_close(AVFormatContext *s)
2155 MXFContext *mxf = s->priv_data;
2156 MXFIndexTableSegment *seg;
2159 av_freep(&mxf->packages_refs);
2161 for (i = 0; i < s->nb_streams; i++)
2162 s->streams[i]->priv_data = NULL;
2164 for (i = 0; i < mxf->metadata_sets_count; i++) {
2165 switch (mxf->metadata_sets[i]->type) {
2166 case MultipleDescriptor:
2167 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2170 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2173 case MaterialPackage:
2174 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2176 case IndexTableSegment:
2177 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2178 av_freep(&seg->temporal_offset_entries);
2179 av_freep(&seg->flag_entries);
2180 av_freep(&seg->stream_offset_entries);
2185 av_freep(&mxf->metadata_sets[i]);
2187 av_freep(&mxf->partitions);
2188 av_freep(&mxf->metadata_sets);
2189 av_freep(&mxf->aesc);
2190 av_freep(&mxf->local_tags);
2192 for (i = 0; i < mxf->nb_index_tables; i++) {
2193 av_freep(&mxf->index_tables[i].segments);
2194 av_freep(&mxf->index_tables[i].ptses);
2195 av_freep(&mxf->index_tables[i].fake_index);
2197 av_freep(&mxf->index_tables);
2202 static int mxf_probe(AVProbeData *p) {
2203 uint8_t *bufp = p->buf;
2204 uint8_t *end = p->buf + p->buf_size;
2206 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2209 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2210 end -= sizeof(mxf_header_partition_pack_key);
2211 for (; bufp < end; bufp++) {
2212 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2213 return AVPROBE_SCORE_MAX;
2218 /* rudimentary byte seek */
2219 /* XXX: use MXF Index */
2220 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2222 AVStream *st = s->streams[stream_index];
2224 MXFContext* mxf = s->priv_data;
2229 if (mxf->nb_index_tables <= 0) {
2231 return AVERROR_INVALIDDATA;
2232 if (sample_time < 0)
2234 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2236 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2238 ff_update_cur_dts(s, st, sample_time);
2239 mxf->current_edit_unit = sample_time;
2241 t = &mxf->index_tables[0];
2243 /* clamp above zero, else ff_index_search_timestamp() returns negative
2244 * this also means we allow seeking before the start */
2245 sample_time = FFMAX(sample_time, 0);
2247 if (t->fake_index) {
2248 /* behave as if we have a proper index */
2249 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2252 /* no IndexEntryArray (one or more CBR segments)
2253 * make sure we don't seek past the end */
2254 sample_time = FFMIN(sample_time, st->duration - 1);
2257 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2260 ff_update_cur_dts(s, st, sample_time);
2261 mxf->current_edit_unit = sample_time;
2262 avio_seek(s->pb, seekpos, SEEK_SET);
2267 AVInputFormat ff_mxf_demuxer = {
2269 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2270 .priv_data_size = sizeof(MXFContext),
2271 .read_probe = mxf_probe,
2272 .read_header = mxf_read_header,
2273 .read_packet = mxf_read_packet,
2274 .read_close = mxf_read_close,
2275 .read_seek = mxf_read_seek,