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
46 #include "libavutil/aes.h"
47 #include "libavutil/avassert.h"
48 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavutil/intreadwrite.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;
135 uint64_t sample_count;
136 int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate
141 enum MXFMetadataSetType type;
142 UID essence_container_ul;
143 UID essence_codec_ul;
144 AVRational sample_rate;
145 AVRational aspect_ratio;
147 int height; /* Field height, not frame height */
148 int frame_layout; /* See MXFFrameLayout enum */
152 unsigned int component_depth;
153 unsigned int horiz_subsampling;
154 unsigned int vert_subsampling;
155 UID *sub_descriptors_refs;
156 int sub_descriptors_count;
160 enum AVPixelFormat pix_fmt;
165 enum MXFMetadataSetType type;
166 int edit_unit_byte_count;
169 AVRational index_edit_rate;
170 uint64_t index_start_position;
171 uint64_t index_duration;
172 int8_t *temporal_offset_entries;
174 uint64_t *stream_offset_entries;
175 int nb_index_entries;
176 } MXFIndexTableSegment;
180 enum MXFMetadataSetType type;
184 MXFDescriptor *descriptor; /* only one */
190 enum MXFMetadataSetType type;
193 /* decoded index table */
197 int nb_ptses; /* number of PTSes or total duration of index */
198 int64_t first_dts; /* DTS = EditUnit + first_dts */
199 int64_t *ptses; /* maps EditUnit -> PTS */
201 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
202 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
206 MXFPartition *partitions;
207 unsigned partitions_count;
211 MXFMetadataSet **metadata_sets;
212 int metadata_sets_count;
216 int local_tags_count;
217 uint64_t last_partition;
218 uint64_t footer_partition;
219 KLVPacket current_klv_data;
220 int current_klv_index;
222 MXFPartition *current_partition;
223 int parsing_backward;
224 int64_t last_forward_tell;
225 int last_forward_partition;
226 int current_edit_unit;
228 MXFIndexTable *index_tables;
229 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
232 enum MXFWrappingScheme {
237 /* NOTE: klv_offset is not set (-1) for local keys */
238 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
242 MXFMetadataReadFunc *read;
244 enum MXFMetadataSetType type;
245 } MXFMetadataReadTableEntry;
247 static int mxf_read_close(AVFormatContext *s);
249 /* partial keys to match */
250 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
251 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
252 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
253 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
254 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
255 /* complete keys to match */
256 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 };
257 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
258 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
259 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
260 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
262 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
264 static int64_t klv_decode_ber_length(AVIOContext *pb)
266 uint64_t size = avio_r8(pb);
267 if (size & 0x80) { /* long form */
268 int bytes_num = size & 0x7f;
269 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
271 return AVERROR_INVALIDDATA;
274 size = size << 8 | avio_r8(pb);
279 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
282 for (i = 0; i < size && !url_feof(pb); i++) {
286 else if (b != key[i])
292 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
294 if (!mxf_read_sync(pb, mxf_klv_key, 4))
295 return AVERROR_INVALIDDATA;
296 klv->offset = avio_tell(pb) - 4;
297 memcpy(klv->key, mxf_klv_key, 4);
298 avio_read(pb, klv->key + 4, 12);
299 klv->length = klv_decode_ber_length(pb);
300 return klv->length == -1 ? -1 : 0;
303 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
307 for (i = 0; i < s->nb_streams; i++) {
308 MXFTrack *track = s->streams[i]->priv_data;
310 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
313 /* return 0 if only one stream, for OP Atom files with 0 as track number */
314 return s->nb_streams == 1 ? 0 : -1;
317 /* XXX: use AVBitStreamFilter */
318 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
320 const uint8_t *buf_ptr, *end_ptr;
324 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
325 return AVERROR_INVALIDDATA;
326 length = av_get_packet(pb, pkt, length);
329 data_ptr = pkt->data;
330 end_ptr = pkt->data + length;
331 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
332 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
333 for (i = 0; i < st->codec->channels; i++) {
334 uint32_t sample = bytestream_get_le32(&buf_ptr);
335 if (st->codec->bits_per_coded_sample == 24)
336 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
338 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
340 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
342 av_shrink_packet(pkt, data_ptr - pkt->data);
346 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
348 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
349 MXFContext *mxf = s->priv_data;
350 AVIOContext *pb = s->pb;
351 int64_t end = avio_tell(pb) + klv->length;
354 uint64_t plaintext_size;
359 if (!mxf->aesc && s->key && s->keylen == 16) {
360 mxf->aesc = av_aes_alloc();
362 return AVERROR(ENOMEM);
363 av_aes_init(mxf->aesc, s->key, 128, 1);
366 avio_skip(pb, klv_decode_ber_length(pb));
368 klv_decode_ber_length(pb);
369 plaintext_size = avio_rb64(pb);
371 klv_decode_ber_length(pb);
372 avio_read(pb, klv->key, 16);
373 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
374 return AVERROR_INVALIDDATA;
375 index = mxf_get_stream_index(s, klv);
377 return AVERROR_INVALIDDATA;
379 klv_decode_ber_length(pb);
380 orig_size = avio_rb64(pb);
381 if (orig_size < plaintext_size)
382 return AVERROR_INVALIDDATA;
384 size = klv_decode_ber_length(pb);
385 if (size < 32 || size - 32 < orig_size)
386 return AVERROR_INVALIDDATA;
387 avio_read(pb, ivec, 16);
388 avio_read(pb, tmpbuf, 16);
390 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
391 if (memcmp(tmpbuf, checkv, 16))
392 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
394 size = av_get_packet(pb, pkt, size);
397 else if (size < plaintext_size)
398 return AVERROR_INVALIDDATA;
399 size -= plaintext_size;
401 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
402 &pkt->data[plaintext_size], size >> 4, ivec, 1);
403 av_shrink_packet(pkt, orig_size);
404 pkt->stream_index = index;
405 avio_skip(pb, end - avio_tell(pb));
409 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
411 MXFContext *mxf = arg;
412 int item_num = avio_rb32(pb);
413 int item_len = avio_rb32(pb);
415 if (item_len != 18) {
416 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
417 return AVERROR_PATCHWELCOME;
419 if (item_num > 65536) {
420 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
421 return AVERROR_INVALIDDATA;
423 mxf->local_tags = av_calloc(item_num, item_len);
424 if (!mxf->local_tags)
425 return AVERROR(ENOMEM);
426 mxf->local_tags_count = item_num;
427 avio_read(pb, mxf->local_tags, item_num*item_len);
431 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
433 MXFContext *mxf = arg;
434 MXFPartition *partition, *tmp_part;
436 uint64_t footer_partition;
437 uint32_t nb_essence_containers;
439 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
441 return AVERROR(ENOMEM);
442 mxf->partitions = tmp_part;
444 if (mxf->parsing_backward) {
445 /* insert the new partition pack in the middle
446 * this makes the entries in mxf->partitions sorted by offset */
447 memmove(&mxf->partitions[mxf->last_forward_partition+1],
448 &mxf->partitions[mxf->last_forward_partition],
449 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
450 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
452 mxf->last_forward_partition++;
453 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
456 memset(partition, 0, sizeof(*partition));
457 mxf->partitions_count++;
458 partition->pack_length = avio_tell(pb) - klv_offset + size;
462 partition->type = Header;
465 partition->type = BodyPartition;
468 partition->type = Footer;
471 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
472 return AVERROR_INVALIDDATA;
475 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
476 partition->closed = partition->type == Footer || !(uid[14] & 1);
477 partition->complete = uid[14] > 2;
479 partition->kag_size = avio_rb32(pb);
480 partition->this_partition = avio_rb64(pb);
481 partition->previous_partition = avio_rb64(pb);
482 footer_partition = avio_rb64(pb);
483 partition->header_byte_count = avio_rb64(pb);
484 partition->index_byte_count = avio_rb64(pb);
485 partition->index_sid = avio_rb32(pb);
487 partition->body_sid = avio_rb32(pb);
488 avio_read(pb, op, sizeof(UID));
489 nb_essence_containers = avio_rb32(pb);
491 /* some files don'thave FooterPartition set in every partition */
492 if (footer_partition) {
493 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
494 av_log(mxf->fc, AV_LOG_ERROR,
495 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
496 mxf->footer_partition, footer_partition);
498 mxf->footer_partition = footer_partition;
503 "PartitionPack: ThisPartition = 0x%"PRIX64
504 ", PreviousPartition = 0x%"PRIX64", "
505 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
506 partition->this_partition,
507 partition->previous_partition, footer_partition,
508 partition->index_sid, partition->body_sid);
510 /* sanity check PreviousPartition if set */
511 if (partition->previous_partition &&
512 mxf->run_in + partition->previous_partition >= klv_offset) {
513 av_log(mxf->fc, AV_LOG_ERROR,
514 "PreviousPartition points to this partition or forward\n");
515 return AVERROR_INVALIDDATA;
518 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
519 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
520 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
521 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
522 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
523 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
524 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
525 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
526 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
527 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
528 else if (op[12] == 0x10) {
529 /* SMPTE 390m: "There shall be exactly one essence container"
530 * The following block deals with files that violate this, namely:
531 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
532 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
533 if (nb_essence_containers != 1) {
534 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
538 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
539 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
545 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
549 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
550 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
552 if (mxf->op == OPSONYOpt)
553 partition->kag_size = 512;
555 partition->kag_size = 1;
557 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
563 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
565 MXFMetadataSet **tmp;
567 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
569 return AVERROR(ENOMEM);
570 mxf->metadata_sets = tmp;
571 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
572 mxf->metadata_sets_count++;
576 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
578 MXFCryptoContext *cryptocontext = arg;
580 return AVERROR_INVALIDDATA;
581 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
582 avio_read(pb, cryptocontext->source_container_ul, 16);
586 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
588 MXFContext *mxf = arg;
591 mxf->packages_count = avio_rb32(pb);
592 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
593 if (!mxf->packages_refs)
594 return AVERROR(ENOMEM);
595 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
596 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
602 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
604 MXFStructuralComponent *source_clip = arg;
607 source_clip->duration = avio_rb64(pb);
610 source_clip->start_position = avio_rb64(pb);
613 /* UMID, only get last 16 bytes */
615 avio_read(pb, source_clip->source_package_uid, 16);
618 source_clip->source_track_id = avio_rb32(pb);
624 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
626 MXFPackage *package = arg;
629 package->tracks_count = avio_rb32(pb);
630 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
631 if (!package->tracks_refs)
632 return AVERROR(ENOMEM);
633 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
634 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
640 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
642 MXFTimecodeComponent *mxf_timecode = arg;
645 mxf_timecode->start_frame = avio_rb64(pb);
648 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
651 mxf_timecode->drop_frame = avio_r8(pb);
657 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
659 MXFTrack *track = arg;
662 track->track_id = avio_rb32(pb);
665 avio_read(pb, track->track_number, 4);
668 track->edit_rate.num = avio_rb32(pb);
669 track->edit_rate.den = avio_rb32(pb);
672 avio_read(pb, track->sequence_ref, 16);
678 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
680 MXFSequence *sequence = arg;
683 sequence->duration = avio_rb64(pb);
686 avio_read(pb, sequence->data_definition_ul, 16);
689 sequence->structural_components_count = avio_rb32(pb);
690 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
691 if (!sequence->structural_components_refs)
692 return AVERROR(ENOMEM);
693 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
694 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
700 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
702 MXFPackage *package = arg;
705 package->tracks_count = avio_rb32(pb);
706 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
707 if (!package->tracks_refs)
708 return AVERROR(ENOMEM);
709 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
710 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
713 /* UMID, only get last 16 bytes */
715 avio_read(pb, package->package_uid, 16);
718 avio_read(pb, package->descriptor_ref, 16);
724 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
728 segment->nb_index_entries = avio_rb32(pb);
730 length = avio_rb32(pb);
732 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
733 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
734 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
735 return AVERROR(ENOMEM);
737 for (i = 0; i < segment->nb_index_entries; i++) {
738 segment->temporal_offset_entries[i] = avio_r8(pb);
739 avio_r8(pb); /* KeyFrameOffset */
740 segment->flag_entries[i] = avio_r8(pb);
741 segment->stream_offset_entries[i] = avio_rb64(pb);
742 avio_skip(pb, length - 11);
747 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
749 MXFIndexTableSegment *segment = arg;
752 segment->edit_unit_byte_count = avio_rb32(pb);
753 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
756 segment->index_sid = avio_rb32(pb);
757 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
760 segment->body_sid = avio_rb32(pb);
761 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
764 av_dlog(NULL, "IndexEntryArray found\n");
765 return mxf_read_index_entry_array(pb, segment);
767 segment->index_edit_rate.num = avio_rb32(pb);
768 segment->index_edit_rate.den = avio_rb32(pb);
769 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
770 segment->index_edit_rate.den);
773 segment->index_start_position = avio_rb64(pb);
774 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
777 segment->index_duration = avio_rb64(pb);
778 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
784 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
786 int code, value, ofs = 0;
787 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
792 av_dlog(NULL, "pixel layout: code %#x\n", code);
795 layout[ofs++] = code;
796 layout[ofs++] = value;
798 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
799 } while (code != 0); /* SMPTE 377M E.2.46 */
801 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
804 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
806 MXFDescriptor *descriptor = arg;
807 descriptor->pix_fmt = AV_PIX_FMT_NONE;
810 descriptor->sub_descriptors_count = avio_rb32(pb);
811 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
812 if (!descriptor->sub_descriptors_refs)
813 return AVERROR(ENOMEM);
814 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
815 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
818 avio_read(pb, descriptor->essence_container_ul, 16);
821 descriptor->linked_track_id = avio_rb32(pb);
823 case 0x3201: /* PictureEssenceCoding */
824 avio_read(pb, descriptor->essence_codec_ul, 16);
827 descriptor->width = avio_rb32(pb);
830 descriptor->height = avio_rb32(pb);
833 descriptor->frame_layout = avio_r8(pb);
836 descriptor->aspect_ratio.num = avio_rb32(pb);
837 descriptor->aspect_ratio.den = avio_rb32(pb);
840 descriptor->field_dominance = avio_r8(pb);
843 descriptor->component_depth = avio_rb32(pb);
846 descriptor->horiz_subsampling = avio_rb32(pb);
849 descriptor->vert_subsampling = avio_rb32(pb);
852 descriptor->sample_rate.num = avio_rb32(pb);
853 descriptor->sample_rate.den = avio_rb32(pb);
855 case 0x3D06: /* SoundEssenceCompression */
856 avio_read(pb, descriptor->essence_codec_ul, 16);
859 descriptor->channels = avio_rb32(pb);
862 descriptor->bits_per_sample = avio_rb32(pb);
865 mxf_read_pixel_layout(pb, descriptor);
868 /* Private uid used by SONY C0023S01.mxf */
869 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
870 if (descriptor->extradata)
871 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
872 av_free(descriptor->extradata);
873 descriptor->extradata_size = 0;
874 descriptor->extradata = av_malloc(size);
875 if (!descriptor->extradata)
876 return AVERROR(ENOMEM);
877 descriptor->extradata_size = size;
878 avio_read(pb, descriptor->extradata, size);
886 * Match an uid independently of the version byte and up to len common bytes
889 static int mxf_match_uid(const UID key, const UID uid, int len)
892 for (i = 0; i < len; i++) {
893 if (i != 7 && key[i] != uid[i])
899 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
901 while (uls->uid[0]) {
902 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
909 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
915 for (i = 0; i < mxf->metadata_sets_count; i++) {
916 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
917 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
918 return mxf->metadata_sets[i];
924 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
925 // video essence container uls
926 { { 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 */
927 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
928 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
929 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
932 /* EC ULs for intra-only formats */
933 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
934 { { 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 */
935 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
938 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
939 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
940 { { 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 */
941 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
942 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
945 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
946 // sound essence container uls
947 { { 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 */
948 { { 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 */
949 { { 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 */
950 { { 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 */
951 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
954 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
956 int i, j, nb_segments = 0;
957 MXFIndexTableSegment **unsorted_segments;
958 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
960 /* count number of segments, allocate arrays and copy unsorted segments */
961 for (i = 0; i < mxf->metadata_sets_count; i++)
962 if (mxf->metadata_sets[i]->type == IndexTableSegment)
966 return AVERROR_INVALIDDATA;
968 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
969 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
970 av_freep(sorted_segments);
971 av_free(unsorted_segments);
972 return AVERROR(ENOMEM);
975 for (i = j = 0; i < mxf->metadata_sets_count; i++)
976 if (mxf->metadata_sets[i]->type == IndexTableSegment)
977 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
979 *nb_sorted_segments = 0;
981 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
982 for (i = 0; i < nb_segments; i++) {
983 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
984 uint64_t best_index_duration = 0;
986 for (j = 0; j < nb_segments; j++) {
987 MXFIndexTableSegment *s = unsorted_segments[j];
989 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
990 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
991 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
993 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
994 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
995 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
997 best_body_sid = s->body_sid;
998 best_index_sid = s->index_sid;
999 best_index_start = s->index_start_position;
1000 best_index_duration = s->index_duration;
1004 /* no suitable entry found -> we're done */
1008 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1009 last_body_sid = best_body_sid;
1010 last_index_sid = best_index_sid;
1011 last_index_start = best_index_start;
1014 av_free(unsorted_segments);
1020 * Computes the absolute file offset of the given essence container offset
1022 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1025 int64_t offset_in = offset; /* for logging */
1027 for (x = 0; x < mxf->partitions_count; x++) {
1028 MXFPartition *p = &mxf->partitions[x];
1030 if (p->body_sid != body_sid)
1033 if (offset < p->essence_length || !p->essence_length) {
1034 *offset_out = p->essence_offset + offset;
1038 offset -= p->essence_length;
1041 av_log(mxf->fc, AV_LOG_ERROR,
1042 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1043 offset_in, body_sid);
1045 return AVERROR_INVALIDDATA;
1049 * Returns the end position of the essence container with given BodySID, or zero if unknown
1051 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1056 for (x = 0; x < mxf->partitions_count; x++) {
1057 MXFPartition *p = &mxf->partitions[x];
1059 if (p->body_sid != body_sid)
1062 if (!p->essence_length)
1065 ret = p->essence_offset + p->essence_length;
1071 /* EditUnit -> absolute offset */
1072 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)
1075 int64_t offset_temp = 0;
1077 for (i = 0; i < index_table->nb_segments; i++) {
1078 MXFIndexTableSegment *s = index_table->segments[i];
1080 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1082 if (edit_unit < s->index_start_position + s->index_duration) {
1083 int64_t index = edit_unit - s->index_start_position;
1085 if (s->edit_unit_byte_count)
1086 offset_temp += s->edit_unit_byte_count * index;
1087 else if (s->nb_index_entries) {
1088 if (s->nb_index_entries == 2 * s->index_duration + 1)
1089 index *= 2; /* Avid index */
1091 if (index < 0 || index >= s->nb_index_entries) {
1092 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1093 index_table->index_sid, s->index_start_position);
1094 return AVERROR_INVALIDDATA;
1097 offset_temp = s->stream_offset_entries[index];
1099 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1100 index_table->index_sid, s->index_start_position);
1101 return AVERROR_INVALIDDATA;
1105 *edit_unit_out = edit_unit;
1107 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1109 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1110 offset_temp += s->edit_unit_byte_count * s->index_duration;
1115 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);
1117 return AVERROR_INVALIDDATA;
1120 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1123 int8_t max_temporal_offset = -128;
1125 /* first compute how many entries we have */
1126 for (i = 0; i < index_table->nb_segments; i++) {
1127 MXFIndexTableSegment *s = index_table->segments[i];
1129 if (!s->nb_index_entries) {
1130 index_table->nb_ptses = 0;
1131 return 0; /* no TemporalOffsets */
1134 index_table->nb_ptses += s->index_duration;
1137 /* paranoid check */
1138 if (index_table->nb_ptses <= 0)
1141 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1142 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1143 av_freep(&index_table->ptses);
1144 return AVERROR(ENOMEM);
1147 /* we may have a few bad TemporalOffsets
1148 * make sure the corresponding PTSes don't have the bogus value 0 */
1149 for (x = 0; x < index_table->nb_ptses; x++)
1150 index_table->ptses[x] = AV_NOPTS_VALUE;
1164 * We want to transform it into this:
1175 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1176 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1177 * The latter makes DTS <= PTS.
1179 for (i = x = 0; i < index_table->nb_segments; i++) {
1180 MXFIndexTableSegment *s = index_table->segments[i];
1181 int index_delta = 1;
1182 int n = s->nb_index_entries;
1184 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1185 index_delta = 2; /* Avid index */
1186 /* ignore the last entry - it's the size of the essence container */
1190 for (j = 0; j < n; j += index_delta, x++) {
1191 int offset = s->temporal_offset_entries[j] / index_delta;
1192 int index = x + offset;
1194 if (x >= index_table->nb_ptses) {
1195 av_log(mxf->fc, AV_LOG_ERROR,
1196 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1197 s->nb_index_entries, s->index_duration);
1201 index_table->fake_index[x].timestamp = x;
1202 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1204 if (index < 0 || index >= index_table->nb_ptses) {
1205 av_log(mxf->fc, AV_LOG_ERROR,
1206 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1211 index_table->ptses[index] = x;
1212 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1216 index_table->first_dts = -max_temporal_offset;
1222 * Sorts and collects index table segments into index tables.
1223 * Also computes PTSes if possible.
1225 static int mxf_compute_index_tables(MXFContext *mxf)
1227 int i, j, k, ret, nb_sorted_segments;
1228 MXFIndexTableSegment **sorted_segments = NULL;
1230 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1231 nb_sorted_segments <= 0) {
1232 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1236 /* sanity check and count unique BodySIDs/IndexSIDs */
1237 for (i = 0; i < nb_sorted_segments; i++) {
1238 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1239 mxf->nb_index_tables++;
1240 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1241 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1242 ret = AVERROR_INVALIDDATA;
1243 goto finish_decoding_index;
1247 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1248 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1249 ret = AVERROR(ENOMEM);
1250 goto finish_decoding_index;
1253 /* distribute sorted segments to index tables */
1254 for (i = j = 0; i < nb_sorted_segments; i++) {
1255 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1260 mxf->index_tables[j].nb_segments++;
1263 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1264 MXFIndexTable *t = &mxf->index_tables[j];
1266 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1267 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1268 ret = AVERROR(ENOMEM);
1269 goto finish_decoding_index;
1272 if (sorted_segments[i]->index_start_position)
1273 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1274 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1276 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1277 t->index_sid = sorted_segments[i]->index_sid;
1278 t->body_sid = sorted_segments[i]->body_sid;
1280 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1281 goto finish_decoding_index;
1283 /* fix zero IndexDurations */
1284 for (k = 0; k < t->nb_segments; k++) {
1285 if (t->segments[k]->index_duration)
1288 if (t->nb_segments > 1)
1289 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1292 if (mxf->fc->nb_streams <= 0) {
1293 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1297 /* assume the first stream's duration is reasonable
1298 * leave index_duration = 0 on further segments in case we have any (unlikely)
1300 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1306 finish_decoding_index:
1307 av_free(sorted_segments);
1311 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1313 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1314 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1315 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1316 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1319 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1321 char buf[AV_TIMECODE_STR_SIZE];
1322 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1327 static int mxf_parse_structural_metadata(MXFContext *mxf)
1329 MXFPackage *material_package = NULL;
1330 MXFPackage *temp_package = NULL;
1333 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1334 /* TODO: handle multiple material packages (OP3x) */
1335 for (i = 0; i < mxf->packages_count; i++) {
1336 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1337 if (material_package) break;
1339 if (!material_package) {
1340 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1341 return AVERROR_INVALIDDATA;
1344 for (i = 0; i < material_package->tracks_count; i++) {
1345 MXFPackage *source_package = NULL;
1346 MXFTrack *material_track = NULL;
1347 MXFTrack *source_track = NULL;
1348 MXFTrack *temp_track = NULL;
1349 MXFDescriptor *descriptor = NULL;
1350 MXFStructuralComponent *component = NULL;
1351 MXFTimecodeComponent *mxf_tc = NULL;
1352 UID *essence_container_ul = NULL;
1353 const MXFCodecUL *codec_ul = NULL;
1354 const MXFCodecUL *container_ul = NULL;
1355 const MXFCodecUL *pix_fmt_ul = NULL;
1360 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1361 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1365 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1366 mxf_tc = (MXFTimecodeComponent*)component;
1367 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1368 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1369 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1373 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1374 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1378 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1379 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1383 mxf_tc = (MXFTimecodeComponent*)component;
1384 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1385 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1386 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1391 /* TODO: handle multiple source clips */
1392 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1393 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1397 for (k = 0; k < mxf->packages_count; k++) {
1398 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1401 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1402 source_package = temp_package;
1406 if (!source_package) {
1407 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1410 for (k = 0; k < source_package->tracks_count; k++) {
1411 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1412 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1413 ret = AVERROR_INVALIDDATA;
1416 if (temp_track->track_id == component->source_track_id) {
1417 source_track = temp_track;
1421 if (!source_track) {
1422 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1426 if (!source_track || !component)
1429 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1430 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1431 ret = AVERROR_INVALIDDATA;
1435 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1436 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1437 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1438 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1442 st = avformat_new_stream(mxf->fc, NULL);
1444 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1445 ret = AVERROR(ENOMEM);
1448 st->id = source_track->track_id;
1449 st->priv_data = source_track;
1450 source_track->original_duration = st->duration = component->duration;
1451 if (st->duration == -1)
1452 st->duration = AV_NOPTS_VALUE;
1453 st->start_time = component->start_position;
1454 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1455 av_log(mxf->fc, AV_LOG_WARNING,
1456 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1457 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1458 material_track->edit_rate = (AVRational){25, 1};
1460 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1462 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1463 source_track->edit_rate = material_track->edit_rate;
1465 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1466 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1467 st->codec->codec_type = codec_ul->id;
1469 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1470 if (source_package->descriptor) {
1471 if (source_package->descriptor->type == MultipleDescriptor) {
1472 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1473 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1475 if (!sub_descriptor) {
1476 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1479 if (sub_descriptor->linked_track_id == source_track->track_id) {
1480 descriptor = sub_descriptor;
1484 } else if (source_package->descriptor->type == Descriptor)
1485 descriptor = source_package->descriptor;
1488 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1491 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1492 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1493 essence_container_ul = &descriptor->essence_container_ul;
1494 /* HACK: replacing the original key with mxf_encrypted_essence_container
1495 * is not allowed according to s429-6, try to find correct information anyway */
1496 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1497 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1498 for (k = 0; k < mxf->metadata_sets_count; k++) {
1499 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1500 if (metadata->type == CryptoContext) {
1501 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1507 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1508 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1509 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1510 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1511 avcodec_get_name(st->codec->codec_id));
1512 for (k = 0; k < 16; k++) {
1513 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1514 descriptor->essence_codec_ul[k]);
1515 if (!(k+1 & 19) || k == 5)
1516 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1518 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1520 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1521 source_track->intra_only = mxf_is_intra_only(descriptor);
1522 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1523 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1524 st->codec->codec_id = container_ul->id;
1525 st->codec->width = descriptor->width;
1526 st->codec->height = descriptor->height; /* Field height, not frame height */
1527 switch (descriptor->frame_layout) {
1528 case SegmentedFrame:
1529 /* This one is a weird layout I don't fully understand. */
1530 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1533 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1536 /* Every other line is stored and needs to be duplicated. */
1537 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1538 break; /* The correct thing to do here is fall through, but by breaking we might be
1539 able to decode some streams at half the vertical resolution, rather than not al all.
1540 It's also for compatibility with the old behavior. */
1543 case SeparateFields:
1544 st->codec->height *= 2; /* Turn field height into frame height. */
1547 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1549 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1550 st->codec->pix_fmt = descriptor->pix_fmt;
1551 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1552 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1553 &descriptor->essence_codec_ul);
1554 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1555 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1556 /* support files created before RP224v10 by defaulting to UYVY422
1557 if subsampling is 4:2:2 and component depth is 8-bit */
1558 if (descriptor->horiz_subsampling == 2 &&
1559 descriptor->vert_subsampling == 1 &&
1560 descriptor->component_depth == 8) {
1561 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1566 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1567 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1568 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1569 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1570 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
1571 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1572 st->codec->channels = descriptor->channels;
1573 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1575 if (descriptor->sample_rate.den > 0) {
1576 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1577 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1579 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1580 "found for stream #%d, time base forced to 1/48000\n",
1581 descriptor->sample_rate.num, descriptor->sample_rate.den,
1583 avpriv_set_pts_info(st, 64, 1, 48000);
1586 /* if duration is set, rescale it from EditRate to SampleRate */
1587 if (st->duration != AV_NOPTS_VALUE)
1588 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1590 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1591 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1592 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1593 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1594 else if (descriptor->bits_per_sample == 32)
1595 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1596 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1597 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1598 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1599 else if (descriptor->bits_per_sample == 32)
1600 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1601 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1602 st->need_parsing = AVSTREAM_PARSE_FULL;
1605 if (descriptor->extradata) {
1606 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1607 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1609 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1610 ret = ff_generate_avci_extradata(st);
1614 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1615 /* TODO: decode timestamps */
1616 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1625 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1631 return AVERROR(EINVAL);
1633 buf_size = size + size/2 + 1;
1634 *str = av_malloc(buf_size);
1636 return AVERROR(ENOMEM);
1638 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1646 static int mxf_uid_to_str(UID uid, char **str)
1650 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1652 return AVERROR(ENOMEM);
1653 for (i = 0; i < sizeof(UID); i++) {
1654 snprintf(p, 2 + 1, "%.2x", uid[i]);
1656 if (i == 3 || i == 5 || i == 7 || i == 9) {
1657 snprintf(p, 1 + 1, "-");
1664 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1666 struct tm time = {0};
1667 time.tm_year = (timestamp >> 48) - 1900;
1668 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1669 time.tm_mday = (timestamp >> 32 & 0xFF);
1670 time.tm_hour = (timestamp >> 24 & 0xFF);
1671 time.tm_min = (timestamp >> 16 & 0xFF);
1672 time.tm_sec = (timestamp >> 8 & 0xFF);
1674 /* ensure month/day are valid */
1675 time.tm_mon = FFMAX(time.tm_mon, 0);
1676 time.tm_mday = FFMAX(time.tm_mday, 1);
1678 *str = av_mallocz(32);
1680 return AVERROR(ENOMEM);
1681 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1686 #define SET_STR_METADATA(pb, name, str) do { \
1687 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1689 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1692 #define SET_UID_METADATA(pb, name, var, str) do { \
1693 avio_read(pb, var, 16); \
1694 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1696 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1699 #define SET_TS_METADATA(pb, name, var, str) do { \
1700 var = avio_rb64(pb); \
1701 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1703 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1706 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1708 MXFContext *mxf = arg;
1709 AVFormatContext *s = mxf->fc;
1716 SET_STR_METADATA(pb, "company_name", str);
1719 SET_STR_METADATA(pb, "product_name", str);
1722 SET_STR_METADATA(pb, "product_version", str);
1725 SET_UID_METADATA(pb, "product_uid", uid, str);
1728 SET_TS_METADATA(pb, "modification_date", ts, str);
1731 SET_STR_METADATA(pb, "application_platform", str);
1734 SET_UID_METADATA(pb, "generation_uid", uid, str);
1737 SET_UID_METADATA(pb, "uid", uid, str);
1743 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1759 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1762 { { 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 */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1765 { { 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 */
1766 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1767 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1768 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1769 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1770 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1771 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1772 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1773 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1776 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1778 AVIOContext *pb = mxf->fc->pb;
1779 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1780 uint64_t klv_end = avio_tell(pb) + klv->length;
1783 return AVERROR(ENOMEM);
1784 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1786 int tag = avio_rb16(pb);
1787 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1788 uint64_t next = avio_tell(pb) + size;
1791 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1792 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1793 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1796 if (tag > 0x7FFF) { /* dynamic tag */
1798 for (i = 0; i < mxf->local_tags_count; i++) {
1799 int local_tag = AV_RB16(mxf->local_tags+i*18);
1800 if (local_tag == tag) {
1801 memcpy(uid, mxf->local_tags+i*18+2, 16);
1802 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1803 PRINT_KEY(mxf->fc, "uid", uid);
1807 if (ctx_size && tag == 0x3C0A)
1808 avio_read(pb, ctx->uid, 16);
1809 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1812 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1813 * it extending past the end of the KLV though (zzuf5.mxf). */
1814 if (avio_tell(pb) > klv_end) {
1818 av_log(mxf->fc, AV_LOG_ERROR,
1819 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1821 return AVERROR_INVALIDDATA;
1822 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1823 avio_seek(pb, next, SEEK_SET);
1825 if (ctx_size) ctx->type = type;
1826 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1830 * Seeks to the previous partition, if possible
1831 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1833 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1835 AVIOContext *pb = mxf->fc->pb;
1837 if (!mxf->current_partition ||
1838 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1839 return 0; /* we've parsed all partitions */
1841 /* seek to previous partition */
1842 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1843 mxf->current_partition = NULL;
1845 av_dlog(mxf->fc, "seeking to previous partition\n");
1851 * Called when essence is encountered
1852 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1854 static int mxf_parse_handle_essence(MXFContext *mxf)
1856 AVIOContext *pb = mxf->fc->pb;
1859 if (mxf->parsing_backward) {
1860 return mxf_seek_to_previous_partition(mxf);
1861 } else if (mxf->footer_partition || mxf->last_partition){
1864 offset = mxf->footer_partition ? mxf->footer_partition : mxf->last_partition;
1866 av_dlog(mxf->fc, "seeking to last partition\n");
1868 /* remember where we were so we don't end up seeking further back than this */
1869 mxf->last_forward_tell = avio_tell(pb);
1871 if (!pb->seekable) {
1872 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1876 /* seek to last partition and parse backward */
1877 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1878 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to last partition @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1879 mxf->run_in + offset, ret);
1883 mxf->current_partition = NULL;
1884 mxf->parsing_backward = 1;
1886 av_dlog(mxf->fc, "can't find last partition\n");
1894 * Called when the next partition or EOF is encountered
1895 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1897 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1899 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1903 * Figures out the proper offset and length of the essence container in each partition
1905 static void mxf_compute_essence_containers(MXFContext *mxf)
1909 /* everything is already correct */
1910 if (mxf->op == OPAtom)
1913 for (x = 0; x < mxf->partitions_count; x++) {
1914 MXFPartition *p = &mxf->partitions[x];
1917 continue; /* BodySID == 0 -> no essence */
1919 if (x >= mxf->partitions_count - 1)
1920 break; /* last partition - can't compute length (and we don't need to) */
1922 /* essence container spans to the next partition */
1923 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1925 if (p->essence_length < 0) {
1926 /* next ThisPartition < essence_offset */
1927 p->essence_length = 0;
1928 av_log(mxf->fc, AV_LOG_ERROR,
1929 "partition %i: bad ThisPartition = %"PRIX64"\n",
1930 x+1, mxf->partitions[x+1].this_partition);
1935 static int64_t round_to_kag(int64_t position, int kag_size)
1937 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1938 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1939 int64_t ret = (position / kag_size) * kag_size;
1940 return ret == position ? ret : ret + kag_size;
1943 static int is_pcm(enum AVCodecID codec_id)
1945 /* we only care about "normal" PCM codecs until we get samples */
1946 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1950 * Deal with the case where for some audio atoms EditUnitByteCount is
1951 * very small (2, 4..). In those cases we should read more than one
1952 * sample per call to mxf_read_packet().
1954 static void mxf_handle_small_eubc(AVFormatContext *s)
1956 MXFContext *mxf = s->priv_data;
1958 /* assuming non-OPAtom == frame wrapped
1959 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1960 if (mxf->op != OPAtom)
1963 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1964 if (s->nb_streams != 1 ||
1965 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1966 !is_pcm(s->streams[0]->codec->codec_id) ||
1967 mxf->nb_index_tables != 1 ||
1968 mxf->index_tables[0].nb_segments != 1 ||
1969 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1972 /* arbitrarily default to 48 kHz PAL audio frame size */
1973 /* TODO: We could compute this from the ratio between the audio
1974 * and video edit rates for 48 kHz NTSC we could use the
1975 * 1802-1802-1802-1802-1801 pattern. */
1976 mxf->edit_units_per_packet = 1920;
1979 static void mxf_read_random_index_pack(AVFormatContext *s)
1981 MXFContext *mxf = s->priv_data;
1986 if (!s->pb->seekable)
1989 file_size = avio_size(s->pb);
1990 avio_seek(s->pb, file_size - 4, SEEK_SET);
1991 length = avio_rb32(s->pb);
1992 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
1994 avio_seek(s->pb, file_size - length, SEEK_SET);
1995 if (klv_read_packet(&klv, s->pb) < 0 ||
1996 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
1997 klv.length != length - 20)
2000 avio_skip(s->pb, klv.length - 12);
2001 mxf->last_partition = avio_rb64(s->pb);
2004 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2007 static int mxf_read_header(AVFormatContext *s)
2009 MXFContext *mxf = s->priv_data;
2011 int64_t essence_offset = 0;
2014 mxf->last_forward_tell = INT64_MAX;
2015 mxf->edit_units_per_packet = 1;
2017 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2018 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2019 return AVERROR_INVALIDDATA;
2021 avio_seek(s->pb, -14, SEEK_CUR);
2023 mxf->run_in = avio_tell(s->pb);
2025 mxf_read_random_index_pack(s);
2027 while (!url_feof(s->pb)) {
2028 const MXFMetadataReadTableEntry *metadata;
2030 if (klv_read_packet(&klv, s->pb) < 0) {
2031 /* EOF - seek to previous partition or stop */
2032 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2038 PRINT_KEY(s, "read header", klv.key);
2039 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2040 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2041 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2042 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2043 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2045 if (!mxf->current_partition) {
2046 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2047 return AVERROR_INVALIDDATA;
2050 if (!mxf->current_partition->essence_offset) {
2051 /* for OP1a we compute essence_offset
2052 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2053 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2054 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2056 int64_t op1a_essence_offset =
2057 round_to_kag(mxf->current_partition->this_partition +
2058 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2059 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2060 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2062 if (mxf->op == OPAtom) {
2063 /* point essence_offset to the actual data
2064 * OPAtom has all the essence in one big KLV
2066 mxf->current_partition->essence_offset = avio_tell(s->pb);
2067 mxf->current_partition->essence_length = klv.length;
2069 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2070 mxf->current_partition->essence_offset = op1a_essence_offset;
2074 if (!essence_offset)
2075 essence_offset = klv.offset;
2077 /* seek to footer, previous partition or stop */
2078 if (mxf_parse_handle_essence(mxf) <= 0)
2081 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2082 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2083 /* next partition pack - keep going, seek to previous partition or stop */
2084 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2086 else if (mxf->parsing_backward)
2088 /* we're still parsing forward. proceed to parsing this partition pack */
2091 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2092 if (IS_KLV_KEY(klv.key, metadata->key)) {
2094 if (klv.key[5] == 0x53) {
2095 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2097 uint64_t next = avio_tell(s->pb) + klv.length;
2098 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2100 /* only seek forward, else this can loop for a long time */
2101 if (avio_tell(s->pb) > next) {
2102 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2104 return AVERROR_INVALIDDATA;
2107 avio_seek(s->pb, next, SEEK_SET);
2110 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2116 if (!metadata->read)
2117 avio_skip(s->pb, klv.length);
2119 /* FIXME avoid seek */
2120 if (!essence_offset) {
2121 av_log(s, AV_LOG_ERROR, "no essence\n");
2122 return AVERROR_INVALIDDATA;
2124 avio_seek(s->pb, essence_offset, SEEK_SET);
2126 mxf_compute_essence_containers(mxf);
2128 /* we need to do this before computing the index tables
2129 * to be able to fill in zero IndexDurations with st->duration */
2130 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2133 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2136 if (mxf->nb_index_tables > 1) {
2137 /* TODO: look up which IndexSID to use via EssenceContainerData */
2138 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2139 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2140 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2141 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2142 ret = AVERROR_INVALIDDATA;
2146 mxf_handle_small_eubc(s);
2156 * Sets mxf->current_edit_unit based on what offset we're currently at.
2157 * @return next_ofs if OK, <0 on error
2159 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2161 int64_t last_ofs = -1, next_ofs = -1;
2162 MXFIndexTable *t = &mxf->index_tables[0];
2164 /* this is called from the OP1a demuxing logic, which means there
2165 * may be no index tables */
2166 if (mxf->nb_index_tables <= 0)
2169 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2170 while (mxf->current_edit_unit >= 0) {
2171 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2174 if (next_ofs <= last_ofs) {
2175 /* large next_ofs didn't change or current_edit_unit wrapped
2176 * around this fixes the infinite loop on zzuf3.mxf */
2177 av_log(mxf->fc, AV_LOG_ERROR,
2178 "next_ofs didn't change. not deriving packet timestamps\n");
2182 if (next_ofs > current_offset)
2185 last_ofs = next_ofs;
2186 mxf->current_edit_unit++;
2189 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2190 if (mxf->current_edit_unit < 0)
2196 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2198 int i, total = 0, size = 0;
2199 AVStream *st = mxf->fc->streams[stream_index];
2200 MXFTrack *track = st->priv_data;
2201 AVRational time_base = av_inv_q(track->edit_rate);
2202 AVRational sample_rate = av_inv_q(st->time_base);
2203 const MXFSamplesPerFrame *spf = NULL;
2205 if ((sample_rate.num / sample_rate.den) == 48000)
2206 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2208 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2209 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2210 av_mul_q(sample_rate, time_base)));
2212 av_log(mxf->fc, AV_LOG_WARNING,
2213 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2214 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2218 while (spf->samples_per_frame[size]) {
2219 total += spf->samples_per_frame[size];
2225 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2226 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2227 *sample_count += spf->samples_per_frame[i];
2233 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2235 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2236 pkt->pts = track->sample_count;
2237 if ( codec->channels <= 0
2238 || av_get_bits_per_sample(codec->codec_id) <= 0
2239 || codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8)
2240 return AVERROR(EINVAL);
2241 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2245 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2248 MXFContext *mxf = s->priv_data;
2250 while (klv_read_packet(&klv, s->pb) == 0) {
2252 PRINT_KEY(s, "read packet", klv.key);
2253 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2254 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2255 ret = mxf_decrypt_triplet(s, pkt, &klv);
2257 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2258 return AVERROR_INVALIDDATA;
2262 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2263 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2264 int index = mxf_get_stream_index(s, &klv);
2265 int64_t next_ofs, next_klv;
2268 AVCodecContext *codec;
2271 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2275 st = s->streams[index];
2276 track = st->priv_data;
2278 if (s->streams[index]->discard == AVDISCARD_ALL)
2281 next_klv = avio_tell(s->pb) + klv.length;
2282 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2284 if (next_ofs >= 0 && next_klv > next_ofs) {
2285 /* if this check is hit then it's possible OPAtom was treated as OP1a
2286 * truncate the packet since it's probably very large (>2 GiB is common) */
2287 avpriv_request_sample(s,
2288 "OPAtom misinterpreted as OP1a?"
2289 "KLV for edit unit %i extending into "
2291 mxf->current_edit_unit);
2292 klv.length = next_ofs - avio_tell(s->pb);
2295 /* check for 8 channels AES3 element */
2296 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2297 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2298 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2299 return AVERROR_INVALIDDATA;
2302 ret = av_get_packet(s->pb, pkt, klv.length);
2306 pkt->stream_index = index;
2307 pkt->pos = klv.offset;
2309 codec = s->streams[index]->codec;
2310 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2311 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2312 MXFIndexTable *t = &mxf->index_tables[0];
2314 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2315 pkt->dts = mxf->current_edit_unit + t->first_dts;
2316 pkt->pts = t->ptses[mxf->current_edit_unit];
2317 } else if (track->intra_only) {
2318 /* intra-only -> PTS = EditUnit.
2319 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2320 pkt->pts = mxf->current_edit_unit;
2322 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2323 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2328 /* seek for truncated packets */
2329 avio_seek(s->pb, next_klv, SEEK_SET);
2334 avio_skip(s->pb, klv.length);
2336 return url_feof(s->pb) ? AVERROR_EOF : -1;
2339 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2341 MXFContext *mxf = s->priv_data;
2343 int64_t ret64, pos, next_pos;
2348 if (mxf->op != OPAtom)
2349 return mxf_read_packet_old(s, pkt);
2351 /* OPAtom - clip wrapped demuxing */
2352 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2354 t = &mxf->index_tables[0];
2356 if (mxf->current_edit_unit >= st->duration)
2359 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2361 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2364 /* compute size by finding the next edit unit or the end of the essence container
2365 * not pretty, but it works */
2366 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2367 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2368 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2369 return AVERROR_INVALIDDATA;
2372 if ((size = next_pos - pos) <= 0) {
2373 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2374 return AVERROR_INVALIDDATA;
2377 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2380 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2383 pkt->stream_index = 0;
2385 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2386 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2387 pkt->dts = mxf->current_edit_unit + t->first_dts;
2388 pkt->pts = t->ptses[mxf->current_edit_unit];
2389 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2390 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2395 mxf->current_edit_unit += edit_units;
2400 static int mxf_read_close(AVFormatContext *s)
2402 MXFContext *mxf = s->priv_data;
2403 MXFIndexTableSegment *seg;
2406 av_freep(&mxf->packages_refs);
2408 for (i = 0; i < s->nb_streams; i++)
2409 s->streams[i]->priv_data = NULL;
2411 for (i = 0; i < mxf->metadata_sets_count; i++) {
2412 switch (mxf->metadata_sets[i]->type) {
2414 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2416 case MultipleDescriptor:
2417 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2420 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2423 case MaterialPackage:
2424 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2426 case IndexTableSegment:
2427 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2428 av_freep(&seg->temporal_offset_entries);
2429 av_freep(&seg->flag_entries);
2430 av_freep(&seg->stream_offset_entries);
2435 av_freep(&mxf->metadata_sets[i]);
2437 av_freep(&mxf->partitions);
2438 av_freep(&mxf->metadata_sets);
2439 av_freep(&mxf->aesc);
2440 av_freep(&mxf->local_tags);
2442 if (mxf->index_tables) {
2443 for (i = 0; i < mxf->nb_index_tables; i++) {
2444 av_freep(&mxf->index_tables[i].segments);
2445 av_freep(&mxf->index_tables[i].ptses);
2446 av_freep(&mxf->index_tables[i].fake_index);
2449 av_freep(&mxf->index_tables);
2454 static int mxf_probe(AVProbeData *p) {
2455 const uint8_t *bufp = p->buf;
2456 const uint8_t *end = p->buf + p->buf_size;
2458 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2461 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2462 end -= sizeof(mxf_header_partition_pack_key);
2464 for (; bufp < end;) {
2465 if (!((bufp[13] - 1) & 0xF2)){
2466 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
2467 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
2468 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
2469 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
2470 return AVPROBE_SCORE_MAX;
2479 /* rudimentary byte seek */
2480 /* XXX: use MXF Index */
2481 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2483 AVStream *st = s->streams[stream_index];
2485 MXFContext* mxf = s->priv_data;
2490 MXFTrack *source_track = st->priv_data;
2492 /* if audio then truncate sample_time to EditRate */
2493 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2494 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2496 if (mxf->nb_index_tables <= 0) {
2498 return AVERROR_INVALIDDATA;
2499 if (sample_time < 0)
2501 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2503 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2505 ff_update_cur_dts(s, st, sample_time);
2506 mxf->current_edit_unit = sample_time;
2508 t = &mxf->index_tables[0];
2510 /* clamp above zero, else ff_index_search_timestamp() returns negative
2511 * this also means we allow seeking before the start */
2512 sample_time = FFMAX(sample_time, 0);
2514 if (t->fake_index) {
2515 /* behave as if we have a proper index */
2516 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2519 /* no IndexEntryArray (one or more CBR segments)
2520 * make sure we don't seek past the end */
2521 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2524 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2527 ff_update_cur_dts(s, st, sample_time);
2528 mxf->current_edit_unit = sample_time;
2529 avio_seek(s->pb, seekpos, SEEK_SET);
2532 // Update all tracks sample count
2533 for (i = 0; i < s->nb_streams; i++) {
2534 AVStream *cur_st = s->streams[i];
2535 MXFTrack *cur_track = cur_st->priv_data;
2536 uint64_t current_sample_count = 0;
2537 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2538 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2542 cur_track->sample_count = current_sample_count;
2548 AVInputFormat ff_mxf_demuxer = {
2550 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2551 .priv_data_size = sizeof(MXFContext),
2552 .read_probe = mxf_probe,
2553 .read_header = mxf_read_header,
2554 .read_packet = mxf_read_packet,
2555 .read_close = mxf_read_close,
2556 .read_seek = mxf_read_seek,