3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/timecode.h"
75 OPSONYOpt, /* FATE sample, violates the spec in places */
78 typedef struct MXFPartition {
81 MXFPartitionType type;
82 uint64_t previous_partition;
85 int64_t this_partition;
86 int64_t essence_offset; ///< absolute offset of essence
87 int64_t essence_length;
89 int64_t header_byte_count;
90 int64_t index_byte_count;
92 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
95 typedef struct MXFCryptoContext {
97 enum MXFMetadataSetType type;
98 UID source_container_ul;
101 typedef struct MXFStructuralComponent {
103 enum MXFMetadataSetType type;
104 UID source_package_uid;
105 UID data_definition_ul;
107 int64_t start_position;
109 } MXFStructuralComponent;
111 typedef struct MXFSequence {
113 enum MXFMetadataSetType type;
114 UID data_definition_ul;
115 UID *structural_components_refs;
116 int structural_components_count;
121 typedef struct MXFTrack {
123 enum MXFMetadataSetType type;
126 struct AVRational rate;
128 } MXFTimecodeComponent;
132 enum MXFMetadataSetType type;
133 UID input_segment_ref;
134 } MXFPulldownComponent;
138 enum MXFMetadataSetType type;
139 UID *structural_components_refs;
140 int structural_components_count;
146 enum MXFMetadataSetType type;
153 enum MXFMetadataSetType type;
154 MXFSequence *sequence; /* mandatory, and only one */
157 uint8_t track_number[4];
158 AVRational edit_rate;
160 uint64_t sample_count;
161 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
164 typedef struct MXFDescriptor {
166 enum MXFMetadataSetType type;
167 UID essence_container_ul;
168 UID essence_codec_ul;
169 AVRational sample_rate;
170 AVRational aspect_ratio;
172 int height; /* Field height, not frame height */
173 int frame_layout; /* See MXFFrameLayout enum */
179 int64_t duration; /* ContainerDuration optional property */
180 unsigned int component_depth;
181 unsigned int horiz_subsampling;
182 unsigned int vert_subsampling;
183 UID *sub_descriptors_refs;
184 int sub_descriptors_count;
188 enum AVPixelFormat pix_fmt;
191 typedef struct MXFIndexTableSegment {
193 enum MXFMetadataSetType type;
194 int edit_unit_byte_count;
197 AVRational index_edit_rate;
198 uint64_t index_start_position;
199 uint64_t index_duration;
200 int8_t *temporal_offset_entries;
202 uint64_t *stream_offset_entries;
203 int nb_index_entries;
204 } MXFIndexTableSegment;
206 typedef struct MXFPackage {
208 enum MXFMetadataSetType type;
213 MXFDescriptor *descriptor; /* only one */
220 typedef struct MXFMetadataSet {
222 enum MXFMetadataSetType type;
225 /* decoded index table */
226 typedef struct MXFIndexTable {
229 int nb_ptses; /* number of PTSes or total duration of index */
230 int64_t first_dts; /* DTS = EditUnit + first_dts */
231 int64_t *ptses; /* maps EditUnit -> PTS */
233 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
234 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
237 typedef struct MXFContext {
238 MXFPartition *partitions;
239 unsigned partitions_count;
243 MXFMetadataSet **metadata_sets;
244 int metadata_sets_count;
248 int local_tags_count;
249 uint64_t footer_partition;
250 KLVPacket current_klv_data;
251 int current_klv_index;
253 MXFPartition *current_partition;
254 int parsing_backward;
255 int64_t last_forward_tell;
256 int last_forward_partition;
257 int current_edit_unit;
259 MXFIndexTable *index_tables;
260 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
263 enum MXFWrappingScheme {
268 /* NOTE: klv_offset is not set (-1) for local keys */
269 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
271 typedef struct MXFMetadataReadTableEntry {
273 MXFMetadataReadFunc *read;
275 enum MXFMetadataSetType type;
276 } MXFMetadataReadTableEntry;
278 static int mxf_read_close(AVFormatContext *s);
280 /* partial keys to match */
281 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
282 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
283 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
284 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
285 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
286 /* complete keys to match */
287 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 };
288 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
289 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
290 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 };
291 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
292 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
293 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
294 static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
295 static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
297 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
299 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
301 MXFIndexTableSegment *seg;
302 switch ((*ctx)->type) {
304 av_freep(&((MXFDescriptor *)*ctx)->extradata);
306 case MultipleDescriptor:
307 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
310 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
313 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
316 case MaterialPackage:
317 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
318 av_freep(&((MXFPackage *)*ctx)->name);
321 av_freep(&((MXFTaggedValue *)*ctx)->name);
322 av_freep(&((MXFTaggedValue *)*ctx)->value);
324 case IndexTableSegment:
325 seg = (MXFIndexTableSegment *)*ctx;
326 av_freep(&seg->temporal_offset_entries);
327 av_freep(&seg->flag_entries);
328 av_freep(&seg->stream_offset_entries);
336 static int64_t klv_decode_ber_length(AVIOContext *pb)
338 uint64_t size = avio_r8(pb);
339 if (size & 0x80) { /* long form */
340 int bytes_num = size & 0x7f;
341 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
343 return AVERROR_INVALIDDATA;
346 size = size << 8 | avio_r8(pb);
351 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
354 for (i = 0; i < size && !avio_feof(pb); i++) {
358 else if (b != key[i])
364 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
366 if (!mxf_read_sync(pb, mxf_klv_key, 4))
367 return AVERROR_INVALIDDATA;
368 klv->offset = avio_tell(pb) - 4;
369 memcpy(klv->key, mxf_klv_key, 4);
370 avio_read(pb, klv->key + 4, 12);
371 klv->length = klv_decode_ber_length(pb);
372 return klv->length == -1 ? -1 : 0;
375 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
379 for (i = 0; i < s->nb_streams; i++) {
380 MXFTrack *track = s->streams[i]->priv_data;
382 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
385 /* return 0 if only one stream, for OP Atom files with 0 as track number */
386 return s->nb_streams == 1 ? 0 : -1;
389 /* XXX: use AVBitStreamFilter */
390 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
392 const uint8_t *buf_ptr, *end_ptr;
396 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
397 return AVERROR_INVALIDDATA;
398 length = av_get_packet(pb, pkt, length);
401 data_ptr = pkt->data;
402 end_ptr = pkt->data + length;
403 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
404 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
405 for (i = 0; i < st->codec->channels; i++) {
406 uint32_t sample = bytestream_get_le32(&buf_ptr);
407 if (st->codec->bits_per_coded_sample == 24)
408 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
410 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
412 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
414 av_shrink_packet(pkt, data_ptr - pkt->data);
418 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
420 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
421 MXFContext *mxf = s->priv_data;
422 AVIOContext *pb = s->pb;
423 int64_t end = avio_tell(pb) + klv->length;
426 uint64_t plaintext_size;
431 if (!mxf->aesc && s->key && s->keylen == 16) {
432 mxf->aesc = av_aes_alloc();
434 return AVERROR(ENOMEM);
435 av_aes_init(mxf->aesc, s->key, 128, 1);
438 avio_skip(pb, klv_decode_ber_length(pb));
440 klv_decode_ber_length(pb);
441 plaintext_size = avio_rb64(pb);
443 klv_decode_ber_length(pb);
444 avio_read(pb, klv->key, 16);
445 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
446 return AVERROR_INVALIDDATA;
447 index = mxf_get_stream_index(s, klv);
449 return AVERROR_INVALIDDATA;
451 klv_decode_ber_length(pb);
452 orig_size = avio_rb64(pb);
453 if (orig_size < plaintext_size)
454 return AVERROR_INVALIDDATA;
456 size = klv_decode_ber_length(pb);
457 if (size < 32 || size - 32 < orig_size)
458 return AVERROR_INVALIDDATA;
459 avio_read(pb, ivec, 16);
460 avio_read(pb, tmpbuf, 16);
462 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
463 if (memcmp(tmpbuf, checkv, 16))
464 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
466 size = av_get_packet(pb, pkt, size);
469 else if (size < plaintext_size)
470 return AVERROR_INVALIDDATA;
471 size -= plaintext_size;
473 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
474 &pkt->data[plaintext_size], size >> 4, ivec, 1);
475 av_shrink_packet(pkt, orig_size);
476 pkt->stream_index = index;
477 avio_skip(pb, end - avio_tell(pb));
481 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
483 MXFContext *mxf = arg;
484 int item_num = avio_rb32(pb);
485 int item_len = avio_rb32(pb);
487 if (item_len != 18) {
488 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
489 return AVERROR_PATCHWELCOME;
491 if (item_num > 65536) {
492 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
493 return AVERROR_INVALIDDATA;
496 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
497 av_free(mxf->local_tags);
498 mxf->local_tags_count = 0;
499 mxf->local_tags = av_calloc(item_num, item_len);
500 if (!mxf->local_tags)
501 return AVERROR(ENOMEM);
502 mxf->local_tags_count = item_num;
503 avio_read(pb, mxf->local_tags, item_num*item_len);
507 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
509 MXFContext *mxf = arg;
510 MXFPartition *partition, *tmp_part;
512 uint64_t footer_partition;
513 uint32_t nb_essence_containers;
515 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
517 return AVERROR(ENOMEM);
518 mxf->partitions = tmp_part;
520 if (mxf->parsing_backward) {
521 /* insert the new partition pack in the middle
522 * this makes the entries in mxf->partitions sorted by offset */
523 memmove(&mxf->partitions[mxf->last_forward_partition+1],
524 &mxf->partitions[mxf->last_forward_partition],
525 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
526 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
528 mxf->last_forward_partition++;
529 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
532 memset(partition, 0, sizeof(*partition));
533 mxf->partitions_count++;
534 partition->pack_length = avio_tell(pb) - klv_offset + size;
535 partition->pack_ofs = klv_offset;
539 partition->type = Header;
542 partition->type = BodyPartition;
545 partition->type = Footer;
548 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
549 return AVERROR_INVALIDDATA;
552 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
553 partition->closed = partition->type == Footer || !(uid[14] & 1);
554 partition->complete = uid[14] > 2;
556 partition->kag_size = avio_rb32(pb);
557 partition->this_partition = avio_rb64(pb);
558 partition->previous_partition = avio_rb64(pb);
559 footer_partition = avio_rb64(pb);
560 partition->header_byte_count = avio_rb64(pb);
561 partition->index_byte_count = avio_rb64(pb);
562 partition->index_sid = avio_rb32(pb);
564 partition->body_sid = avio_rb32(pb);
565 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
566 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
567 return AVERROR_INVALIDDATA;
569 nb_essence_containers = avio_rb32(pb);
571 if (partition->this_partition &&
572 partition->previous_partition == partition->this_partition) {
573 av_log(mxf->fc, AV_LOG_ERROR,
574 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
575 partition->previous_partition);
576 /* override with the actual previous partition offset */
577 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
579 mxf->partitions + mxf->last_forward_partition - 2;
580 partition->previous_partition = prev->this_partition;
582 /* if no previous body partition are found point to the header
584 if (partition->previous_partition == partition->this_partition)
585 partition->previous_partition = 0;
586 av_log(mxf->fc, AV_LOG_ERROR,
587 "Overriding PreviousPartition with %"PRIx64"\n",
588 partition->previous_partition);
591 /* some files don'thave FooterPartition set in every partition */
592 if (footer_partition) {
593 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
594 av_log(mxf->fc, AV_LOG_ERROR,
595 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
596 mxf->footer_partition, footer_partition);
598 mxf->footer_partition = footer_partition;
603 "PartitionPack: ThisPartition = 0x%"PRIX64
604 ", PreviousPartition = 0x%"PRIX64", "
605 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
606 partition->this_partition,
607 partition->previous_partition, footer_partition,
608 partition->index_sid, partition->body_sid);
610 /* sanity check PreviousPartition if set */
611 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
612 if (partition->previous_partition &&
613 mxf->run_in + partition->previous_partition >= klv_offset) {
614 av_log(mxf->fc, AV_LOG_ERROR,
615 "PreviousPartition points to this partition or forward\n");
616 return AVERROR_INVALIDDATA;
619 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
620 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
621 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
622 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
623 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
624 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
625 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
626 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
627 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
628 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
629 else if (op[12] == 0x10) {
630 /* SMPTE 390m: "There shall be exactly one essence container"
631 * The following block deals with files that violate this, namely:
632 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
633 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
634 if (nb_essence_containers != 1) {
635 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
639 av_log(mxf->fc, AV_LOG_WARNING,
640 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
641 nb_essence_containers,
642 op == OP1a ? "OP1a" : "OPAtom");
648 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
652 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
653 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
654 partition->kag_size);
656 if (mxf->op == OPSONYOpt)
657 partition->kag_size = 512;
659 partition->kag_size = 1;
661 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
667 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
669 MXFMetadataSet **tmp;
671 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
673 return AVERROR(ENOMEM);
674 mxf->metadata_sets = tmp;
675 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
676 mxf->metadata_sets_count++;
680 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
682 MXFCryptoContext *cryptocontext = arg;
684 return AVERROR_INVALIDDATA;
685 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
686 avio_read(pb, cryptocontext->source_container_ul, 16);
690 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
692 *count = avio_rb32(pb);
693 *refs = av_calloc(*count, sizeof(UID));
696 return AVERROR(ENOMEM);
698 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
699 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
703 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
705 MXFContext *mxf = arg;
708 if (mxf->packages_refs)
709 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
710 av_free(mxf->packages_refs);
711 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
716 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
718 MXFStructuralComponent *source_clip = arg;
721 source_clip->duration = avio_rb64(pb);
724 source_clip->start_position = avio_rb64(pb);
727 /* UMID, only get last 16 bytes */
729 avio_read(pb, source_clip->source_package_uid, 16);
732 source_clip->source_track_id = avio_rb32(pb);
738 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
740 MXFTimecodeComponent *mxf_timecode = arg;
743 mxf_timecode->start_frame = avio_rb64(pb);
746 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
749 mxf_timecode->drop_frame = avio_r8(pb);
755 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
757 MXFPulldownComponent *mxf_pulldown = arg;
760 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
766 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
768 MXFTrack *track = arg;
771 track->track_id = avio_rb32(pb);
774 avio_read(pb, track->track_number, 4);
777 track->edit_rate.num = avio_rb32(pb);
778 track->edit_rate.den = avio_rb32(pb);
781 avio_read(pb, track->sequence_ref, 16);
787 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
789 MXFSequence *sequence = arg;
792 sequence->duration = avio_rb64(pb);
795 avio_read(pb, sequence->data_definition_ul, 16);
798 sequence->origin = avio_r8(pb);
801 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
802 &sequence->structural_components_count);
807 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
809 MXFEssenceGroup *essence_group = arg;
812 essence_group->duration = avio_rb64(pb);
815 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
816 &essence_group->structural_components_count);
821 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
827 return AVERROR(EINVAL);
829 buf_size = size + size / 2 + 1;
830 *str = av_malloc(buf_size);
832 return AVERROR(ENOMEM);
835 ret = avio_get_str16be(pb, size, *str, buf_size);
837 ret = avio_get_str16le(pb, size, *str, buf_size);
847 #define READ_STR16(type, big_endian) \
848 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
850 return mxf_read_utf16_string(pb, size, str, big_endian); \
856 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
858 MXFPackage *package = arg;
861 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
862 &package->tracks_count);
865 avio_read(pb, package->package_ul, 16);
866 avio_read(pb, package->package_uid, 16);
869 avio_read(pb, package->descriptor_ref, 16);
872 return mxf_read_utf16be_string(pb, size, &package->name);
874 return mxf_read_strong_ref_array(pb, &package->comment_refs,
875 &package->comment_count);
880 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
884 segment->nb_index_entries = avio_rb32(pb);
886 length = avio_rb32(pb);
888 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
889 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
890 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
891 av_freep(&segment->temporal_offset_entries);
892 av_freep(&segment->flag_entries);
893 return AVERROR(ENOMEM);
896 for (i = 0; i < segment->nb_index_entries; i++) {
897 segment->temporal_offset_entries[i] = avio_r8(pb);
898 avio_r8(pb); /* KeyFrameOffset */
899 segment->flag_entries[i] = avio_r8(pb);
900 segment->stream_offset_entries[i] = avio_rb64(pb);
901 avio_skip(pb, length - 11);
906 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
908 MXFIndexTableSegment *segment = arg;
911 segment->edit_unit_byte_count = avio_rb32(pb);
912 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
915 segment->index_sid = avio_rb32(pb);
916 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
919 segment->body_sid = avio_rb32(pb);
920 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
923 av_dlog(NULL, "IndexEntryArray found\n");
924 return mxf_read_index_entry_array(pb, segment);
926 segment->index_edit_rate.num = avio_rb32(pb);
927 segment->index_edit_rate.den = avio_rb32(pb);
928 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
929 segment->index_edit_rate.den);
932 segment->index_start_position = avio_rb64(pb);
933 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
936 segment->index_duration = avio_rb64(pb);
937 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
943 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
945 int code, value, ofs = 0;
946 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
951 av_dlog(NULL, "pixel layout: code %#x\n", code);
954 layout[ofs++] = code;
955 layout[ofs++] = value;
957 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
958 } while (code != 0); /* SMPTE 377M E.2.46 */
960 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
963 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
965 MXFDescriptor *descriptor = arg;
968 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
969 &descriptor->sub_descriptors_count);
970 case 0x3002: /* ContainerDuration */
971 descriptor->duration = avio_rb64(pb);
974 avio_read(pb, descriptor->essence_container_ul, 16);
977 descriptor->linked_track_id = avio_rb32(pb);
979 case 0x3201: /* PictureEssenceCoding */
980 avio_read(pb, descriptor->essence_codec_ul, 16);
983 descriptor->width = avio_rb32(pb);
986 descriptor->height = avio_rb32(pb);
989 descriptor->frame_layout = avio_r8(pb);
992 descriptor->aspect_ratio.num = avio_rb32(pb);
993 descriptor->aspect_ratio.den = avio_rb32(pb);
996 descriptor->field_dominance = avio_r8(pb);
999 descriptor->component_depth = avio_rb32(pb);
1002 descriptor->horiz_subsampling = avio_rb32(pb);
1005 descriptor->vert_subsampling = avio_rb32(pb);
1008 descriptor->sample_rate.num = avio_rb32(pb);
1009 descriptor->sample_rate.den = avio_rb32(pb);
1011 case 0x3D06: /* SoundEssenceCompression */
1012 avio_read(pb, descriptor->essence_codec_ul, 16);
1015 descriptor->channels = avio_rb32(pb);
1018 descriptor->bits_per_sample = avio_rb32(pb);
1021 mxf_read_pixel_layout(pb, descriptor);
1024 /* Private uid used by SONY C0023S01.mxf */
1025 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1026 if (descriptor->extradata)
1027 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1028 av_free(descriptor->extradata);
1029 descriptor->extradata_size = 0;
1030 descriptor->extradata = av_malloc(size);
1031 if (!descriptor->extradata)
1032 return AVERROR(ENOMEM);
1033 descriptor->extradata_size = size;
1034 avio_read(pb, descriptor->extradata, size);
1036 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1037 uint32_t rsiz = avio_rb16(pb);
1038 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1039 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1040 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1047 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1049 MXFTaggedValue *tagged_value = arg;
1055 avio_read(pb, key, 17);
1056 /* TODO: handle other types of of indirect values */
1057 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1058 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1059 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1060 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1065 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1067 MXFTaggedValue *tagged_value = arg;
1070 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1072 return mxf_read_indirect_value(tagged_value, pb, size);
1078 * Match an uid independently of the version byte and up to len common bytes
1081 static int mxf_match_uid(const UID key, const UID uid, int len)
1084 for (i = 0; i < len; i++) {
1085 if (i != 7 && key[i] != uid[i])
1091 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1093 while (uls->uid[0]) {
1094 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1101 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1107 for (i = 0; i < mxf->metadata_sets_count; i++) {
1108 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1109 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1110 return mxf->metadata_sets[i];
1116 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1117 // video essence container uls
1118 { { 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 */
1119 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1120 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1121 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1122 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1125 /* EC ULs for intra-only formats */
1126 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1127 { { 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 */
1128 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1131 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1132 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1133 { { 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 */
1134 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1135 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1138 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1139 // sound essence container uls
1140 { { 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 */
1141 { { 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 */
1142 { { 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 */
1143 { { 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 */
1144 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
1145 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1148 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1149 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1150 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1153 static const char* const mxf_data_essence_descriptor[] = {
1154 "vbi_vanc_smpte_436M",
1157 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1159 int i, j, nb_segments = 0;
1160 MXFIndexTableSegment **unsorted_segments;
1161 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1163 /* count number of segments, allocate arrays and copy unsorted segments */
1164 for (i = 0; i < mxf->metadata_sets_count; i++)
1165 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1169 return AVERROR_INVALIDDATA;
1171 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1172 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1173 av_freep(sorted_segments);
1174 av_free(unsorted_segments);
1175 return AVERROR(ENOMEM);
1178 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1179 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1180 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1182 *nb_sorted_segments = 0;
1184 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1185 for (i = 0; i < nb_segments; i++) {
1186 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1187 uint64_t best_index_duration = 0;
1189 for (j = 0; j < nb_segments; j++) {
1190 MXFIndexTableSegment *s = unsorted_segments[j];
1192 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1193 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1194 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1196 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1197 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1198 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1200 best_body_sid = s->body_sid;
1201 best_index_sid = s->index_sid;
1202 best_index_start = s->index_start_position;
1203 best_index_duration = s->index_duration;
1207 /* no suitable entry found -> we're done */
1211 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1212 last_body_sid = best_body_sid;
1213 last_index_sid = best_index_sid;
1214 last_index_start = best_index_start;
1217 av_free(unsorted_segments);
1223 * Computes the absolute file offset of the given essence container offset
1225 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1228 int64_t offset_in = offset; /* for logging */
1230 for (x = 0; x < mxf->partitions_count; x++) {
1231 MXFPartition *p = &mxf->partitions[x];
1233 if (p->body_sid != body_sid)
1236 if (offset < p->essence_length || !p->essence_length) {
1237 *offset_out = p->essence_offset + offset;
1241 offset -= p->essence_length;
1244 av_log(mxf->fc, AV_LOG_ERROR,
1245 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1246 offset_in, body_sid);
1248 return AVERROR_INVALIDDATA;
1252 * Returns the end position of the essence container with given BodySID, or zero if unknown
1254 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1259 for (x = 0; x < mxf->partitions_count; x++) {
1260 MXFPartition *p = &mxf->partitions[x];
1262 if (p->body_sid != body_sid)
1265 if (!p->essence_length)
1268 ret = p->essence_offset + p->essence_length;
1274 /* EditUnit -> absolute offset */
1275 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)
1278 int64_t offset_temp = 0;
1280 for (i = 0; i < index_table->nb_segments; i++) {
1281 MXFIndexTableSegment *s = index_table->segments[i];
1283 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1285 if (edit_unit < s->index_start_position + s->index_duration) {
1286 int64_t index = edit_unit - s->index_start_position;
1288 if (s->edit_unit_byte_count)
1289 offset_temp += s->edit_unit_byte_count * index;
1290 else if (s->nb_index_entries) {
1291 if (s->nb_index_entries == 2 * s->index_duration + 1)
1292 index *= 2; /* Avid index */
1294 if (index < 0 || index >= s->nb_index_entries) {
1295 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1296 index_table->index_sid, s->index_start_position);
1297 return AVERROR_INVALIDDATA;
1300 offset_temp = s->stream_offset_entries[index];
1302 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1303 index_table->index_sid, s->index_start_position);
1304 return AVERROR_INVALIDDATA;
1308 *edit_unit_out = edit_unit;
1310 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1312 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1313 offset_temp += s->edit_unit_byte_count * s->index_duration;
1318 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);
1320 return AVERROR_INVALIDDATA;
1323 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1326 int8_t max_temporal_offset = -128;
1328 /* first compute how many entries we have */
1329 for (i = 0; i < index_table->nb_segments; i++) {
1330 MXFIndexTableSegment *s = index_table->segments[i];
1332 if (!s->nb_index_entries) {
1333 index_table->nb_ptses = 0;
1334 return 0; /* no TemporalOffsets */
1337 index_table->nb_ptses += s->index_duration;
1340 /* paranoid check */
1341 if (index_table->nb_ptses <= 0)
1344 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1345 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1346 av_freep(&index_table->ptses);
1347 return AVERROR(ENOMEM);
1350 /* we may have a few bad TemporalOffsets
1351 * make sure the corresponding PTSes don't have the bogus value 0 */
1352 for (x = 0; x < index_table->nb_ptses; x++)
1353 index_table->ptses[x] = AV_NOPTS_VALUE;
1367 * We want to transform it into this:
1378 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1379 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1380 * The latter makes DTS <= PTS.
1382 for (i = x = 0; i < index_table->nb_segments; i++) {
1383 MXFIndexTableSegment *s = index_table->segments[i];
1384 int index_delta = 1;
1385 int n = s->nb_index_entries;
1387 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1388 index_delta = 2; /* Avid index */
1389 /* ignore the last entry - it's the size of the essence container */
1393 for (j = 0; j < n; j += index_delta, x++) {
1394 int offset = s->temporal_offset_entries[j] / index_delta;
1395 int index = x + offset;
1397 if (x >= index_table->nb_ptses) {
1398 av_log(mxf->fc, AV_LOG_ERROR,
1399 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1400 s->nb_index_entries, s->index_duration);
1404 index_table->fake_index[x].timestamp = x;
1405 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1407 if (index < 0 || index >= index_table->nb_ptses) {
1408 av_log(mxf->fc, AV_LOG_ERROR,
1409 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1414 index_table->ptses[index] = x;
1415 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1419 index_table->first_dts = -max_temporal_offset;
1425 * Sorts and collects index table segments into index tables.
1426 * Also computes PTSes if possible.
1428 static int mxf_compute_index_tables(MXFContext *mxf)
1430 int i, j, k, ret, nb_sorted_segments;
1431 MXFIndexTableSegment **sorted_segments = NULL;
1433 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1434 nb_sorted_segments <= 0) {
1435 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1439 /* sanity check and count unique BodySIDs/IndexSIDs */
1440 for (i = 0; i < nb_sorted_segments; i++) {
1441 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1442 mxf->nb_index_tables++;
1443 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1444 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1445 ret = AVERROR_INVALIDDATA;
1446 goto finish_decoding_index;
1450 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1451 sizeof(*mxf->index_tables));
1452 if (!mxf->index_tables) {
1453 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1454 ret = AVERROR(ENOMEM);
1455 goto finish_decoding_index;
1458 /* distribute sorted segments to index tables */
1459 for (i = j = 0; i < nb_sorted_segments; i++) {
1460 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1465 mxf->index_tables[j].nb_segments++;
1468 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1469 MXFIndexTable *t = &mxf->index_tables[j];
1471 t->segments = av_mallocz_array(t->nb_segments,
1472 sizeof(*t->segments));
1475 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1476 " pointer array\n");
1477 ret = AVERROR(ENOMEM);
1478 goto finish_decoding_index;
1481 if (sorted_segments[i]->index_start_position)
1482 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1483 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1485 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1486 t->index_sid = sorted_segments[i]->index_sid;
1487 t->body_sid = sorted_segments[i]->body_sid;
1489 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1490 goto finish_decoding_index;
1492 /* fix zero IndexDurations */
1493 for (k = 0; k < t->nb_segments; k++) {
1494 if (t->segments[k]->index_duration)
1497 if (t->nb_segments > 1)
1498 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1501 if (mxf->fc->nb_streams <= 0) {
1502 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1506 /* assume the first stream's duration is reasonable
1507 * leave index_duration = 0 on further segments in case we have any (unlikely)
1509 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1515 finish_decoding_index:
1516 av_free(sorted_segments);
1520 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1522 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1523 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1524 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1525 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1528 static int mxf_uid_to_str(UID uid, char **str)
1532 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1534 return AVERROR(ENOMEM);
1535 for (i = 0; i < sizeof(UID); i++) {
1536 snprintf(p, 2 + 1, "%.2x", uid[i]);
1538 if (i == 3 || i == 5 || i == 7 || i == 9) {
1539 snprintf(p, 1 + 1, "-");
1546 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1550 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1552 return AVERROR(ENOMEM);
1553 snprintf(p, 2 + 1, "0x");
1555 for (i = 0; i < sizeof(UID); i++) {
1556 snprintf(p, 2 + 1, "%.2X", ul[i]);
1560 for (i = 0; i < sizeof(UID); i++) {
1561 snprintf(p, 2 + 1, "%.2X", uid[i]);
1567 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1573 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1575 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1579 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1581 char buf[AV_TIMECODE_STR_SIZE];
1582 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1587 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1589 MXFStructuralComponent *component = NULL;
1590 MXFPulldownComponent *pulldown = NULL;
1592 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1596 switch (component->type) {
1597 case TimecodeComponent:
1598 return (MXFTimecodeComponent*)component;
1599 case PulldownComponent: /* timcode component may be located on a pulldown component */
1600 pulldown = (MXFPulldownComponent*)component;
1601 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1608 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1610 MXFPackage *package = NULL;
1613 for (i = 0; i < mxf->packages_count; i++) {
1614 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1618 if (!memcmp(package->package_uid, package_uid, 16))
1624 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1626 MXFDescriptor *sub_descriptor = NULL;
1632 if (descriptor->type == MultipleDescriptor) {
1633 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1634 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1636 if (!sub_descriptor) {
1637 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1640 if (sub_descriptor->linked_track_id == track_id) {
1641 return sub_descriptor;
1644 } else if (descriptor->type == Descriptor)
1650 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1652 MXFStructuralComponent *component = NULL;
1653 MXFPackage *package = NULL;
1654 MXFDescriptor *descriptor = NULL;
1657 if (!essence_group || !essence_group->structural_components_count)
1660 /* essence groups contains multiple representations of the same media,
1661 this return the first components with a valid Descriptor typically index 0 */
1662 for (i =0; i < essence_group->structural_components_count; i++){
1663 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1667 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1670 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1677 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1679 MXFStructuralComponent *component = NULL;
1681 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1684 switch (component->type) {
1688 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1695 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1697 MXFTaggedValue *tag;
1701 for (i = 0; i < package->comment_count; i++) {
1702 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1703 if (!tag || !tag->name || !tag->value)
1706 size = strlen(tag->name) + 8 + 1;
1707 key = av_mallocz(size);
1709 return AVERROR(ENOMEM);
1711 snprintf(key, size, "comment_%s", tag->name);
1712 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1717 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1719 MXFPackage *physical_package = NULL;
1720 MXFTrack *physical_track = NULL;
1721 MXFStructuralComponent *sourceclip = NULL;
1722 MXFTimecodeComponent *mxf_tc = NULL;
1726 int64_t start_position;
1728 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1729 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1733 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1736 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1738 /* the name of physical source package is name of the reel or tape */
1739 if (physical_package->name && physical_package->name[0])
1740 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1742 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1743 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1745 for (j = 0; j < physical_package->tracks_count; j++) {
1746 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1747 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1751 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1752 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1756 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1757 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1760 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1761 /* scale sourceclip start_position to match physical track edit rate */
1762 start_position = av_rescale_q(sourceclip->start_position,
1763 physical_track->edit_rate,
1764 source_track->edit_rate);
1766 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1767 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1777 static int mxf_parse_structural_metadata(MXFContext *mxf)
1779 MXFPackage *material_package = NULL;
1782 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1783 /* TODO: handle multiple material packages (OP3x) */
1784 for (i = 0; i < mxf->packages_count; i++) {
1785 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1786 if (material_package) break;
1788 if (!material_package) {
1789 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1790 return AVERROR_INVALIDDATA;
1793 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1794 if (material_package->name && material_package->name[0])
1795 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1796 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1798 for (i = 0; i < material_package->tracks_count; i++) {
1799 MXFPackage *source_package = NULL;
1800 MXFTrack *material_track = NULL;
1801 MXFTrack *source_track = NULL;
1802 MXFTrack *temp_track = NULL;
1803 MXFDescriptor *descriptor = NULL;
1804 MXFStructuralComponent *component = NULL;
1805 MXFTimecodeComponent *mxf_tc = NULL;
1806 UID *essence_container_ul = NULL;
1807 const MXFCodecUL *codec_ul = NULL;
1808 const MXFCodecUL *container_ul = NULL;
1809 const MXFCodecUL *pix_fmt_ul = NULL;
1814 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1815 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1819 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1820 mxf_tc = (MXFTimecodeComponent*)component;
1821 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1822 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1823 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1827 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1828 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1832 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1833 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1837 mxf_tc = (MXFTimecodeComponent*)component;
1838 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1839 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1840 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1845 /* TODO: handle multiple source clips */
1846 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1847 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1851 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1852 if (!source_package) {
1853 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1856 for (k = 0; k < source_package->tracks_count; k++) {
1857 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1858 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1859 ret = AVERROR_INVALIDDATA;
1862 if (temp_track->track_id == component->source_track_id) {
1863 source_track = temp_track;
1867 if (!source_track) {
1868 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1872 if (!source_track || !component)
1875 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1876 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1877 ret = AVERROR_INVALIDDATA;
1881 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1882 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1883 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1884 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1888 st = avformat_new_stream(mxf->fc, NULL);
1890 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1891 ret = AVERROR(ENOMEM);
1894 st->id = source_track->track_id;
1895 st->priv_data = source_track;
1897 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1898 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1900 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1901 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1902 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1903 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1905 source_track->original_duration = st->duration = component->duration;
1907 if (st->duration == -1)
1908 st->duration = AV_NOPTS_VALUE;
1909 st->start_time = component->start_position;
1910 if (material_track->edit_rate.num <= 0 ||
1911 material_track->edit_rate.den <= 0) {
1912 av_log(mxf->fc, AV_LOG_WARNING,
1913 "Invalid edit rate (%d/%d) found on stream #%d, "
1914 "defaulting to 25/1\n",
1915 material_track->edit_rate.num,
1916 material_track->edit_rate.den, st->index);
1917 material_track->edit_rate = (AVRational){25, 1};
1919 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1921 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1922 * the former is accessible via st->priv_data */
1923 source_track->edit_rate = material_track->edit_rate;
1925 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1926 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1927 st->codec->codec_type = codec_ul->id;
1930 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1933 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1934 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1935 essence_container_ul = &descriptor->essence_container_ul;
1936 /* HACK: replacing the original key with mxf_encrypted_essence_container
1937 * is not allowed according to s429-6, try to find correct information anyway */
1938 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1939 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1940 for (k = 0; k < mxf->metadata_sets_count; k++) {
1941 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1942 if (metadata->type == CryptoContext) {
1943 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1949 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1950 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1951 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1952 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1953 avcodec_get_name(st->codec->codec_id));
1954 for (k = 0; k < 16; k++) {
1955 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1956 descriptor->essence_codec_ul[k]);
1957 if (!(k+1 & 19) || k == 5)
1958 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1960 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1962 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
1963 if (source_package->name && source_package->name[0])
1964 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1966 mxf_parse_physical_source_package(mxf, source_track, st);
1968 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1969 source_track->intra_only = mxf_is_intra_only(descriptor);
1970 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1971 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1972 st->codec->codec_id = container_ul->id;
1973 st->codec->width = descriptor->width;
1974 st->codec->height = descriptor->height; /* Field height, not frame height */
1975 switch (descriptor->frame_layout) {
1976 case SegmentedFrame:
1977 /* This one is a weird layout I don't fully understand. */
1978 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1981 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1984 /* Every other line is stored and needs to be duplicated. */
1985 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1986 break; /* The correct thing to do here is fall through, but by breaking we might be
1987 able to decode some streams at half the vertical resolution, rather than not al all.
1988 It's also for compatibility with the old behavior. */
1991 case SeparateFields:
1992 switch (descriptor->field_dominance) {
1994 st->codec->field_order = AV_FIELD_TT;
1997 st->codec->field_order = AV_FIELD_BB;
2000 avpriv_request_sample(mxf->fc,
2001 "Field dominance %d support",
2002 descriptor->field_dominance);
2003 case 0: // we already have many samples with field_dominance == unknown
2006 /* Turn field height into frame height. */
2007 st->codec->height *= 2;
2010 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2012 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2013 st->codec->pix_fmt = descriptor->pix_fmt;
2014 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2015 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2016 &descriptor->essence_codec_ul);
2017 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2018 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2019 /* support files created before RP224v10 by defaulting to UYVY422
2020 if subsampling is 4:2:2 and component depth is 8-bit */
2021 if (descriptor->horiz_subsampling == 2 &&
2022 descriptor->vert_subsampling == 1 &&
2023 descriptor->component_depth == 8) {
2024 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
2029 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2030 if (material_track->sequence->origin) {
2031 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2033 if (source_track->sequence->origin) {
2034 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2036 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2037 st->display_aspect_ratio = descriptor->aspect_ratio;
2038 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2039 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2040 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2041 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))
2042 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2043 st->codec->channels = descriptor->channels;
2044 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2046 if (descriptor->sample_rate.den > 0) {
2047 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2048 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2050 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2051 "found for stream #%d, time base forced to 1/48000\n",
2052 descriptor->sample_rate.num, descriptor->sample_rate.den,
2054 avpriv_set_pts_info(st, 64, 1, 48000);
2057 /* if duration is set, rescale it from EditRate to SampleRate */
2058 if (st->duration != AV_NOPTS_VALUE)
2059 st->duration = av_rescale_q(st->duration,
2060 av_inv_q(material_track->edit_rate),
2063 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2064 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2065 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2066 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2067 else if (descriptor->bits_per_sample == 32)
2068 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2069 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2070 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2071 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2072 else if (descriptor->bits_per_sample == 32)
2073 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2074 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2075 st->need_parsing = AVSTREAM_PARSE_FULL;
2077 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2078 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2079 essence_container_ul)->id;
2080 if (codec_id >= 0 &&
2081 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2082 av_dict_set(&st->metadata, "data_type",
2083 mxf_data_essence_descriptor[codec_id], 0);
2086 if (descriptor->extradata) {
2087 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2088 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2090 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2091 ret = ff_generate_avci_extradata(st);
2095 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2096 /* TODO: decode timestamps */
2097 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2106 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2108 struct tm time = { 0 };
2109 time.tm_year = (timestamp >> 48) - 1900;
2110 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2111 time.tm_mday = (timestamp >> 32 & 0xFF);
2112 time.tm_hour = (timestamp >> 24 & 0xFF);
2113 time.tm_min = (timestamp >> 16 & 0xFF);
2114 time.tm_sec = (timestamp >> 8 & 0xFF);
2116 /* msvcrt versions of strftime calls the invalid parameter handler
2117 * (aborting the process if one isn't set) if the parameters are out
2119 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2120 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2121 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2122 time.tm_min = av_clip(time.tm_min, 0, 59);
2123 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2125 *str = av_mallocz(32);
2127 return AVERROR(ENOMEM);
2128 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2134 #define SET_STR_METADATA(pb, name, str) do { \
2135 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2137 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2140 #define SET_UID_METADATA(pb, name, var, str) do { \
2141 avio_read(pb, var, 16); \
2142 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2144 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2147 #define SET_TS_METADATA(pb, name, var, str) do { \
2148 var = avio_rb64(pb); \
2149 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2151 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2154 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2156 MXFContext *mxf = arg;
2157 AVFormatContext *s = mxf->fc;
2164 SET_STR_METADATA(pb, "company_name", str);
2167 SET_STR_METADATA(pb, "product_name", str);
2170 SET_STR_METADATA(pb, "product_version", str);
2173 SET_UID_METADATA(pb, "product_uid", uid, str);
2176 SET_TS_METADATA(pb, "modification_date", ts, str);
2179 SET_STR_METADATA(pb, "application_platform", str);
2182 SET_UID_METADATA(pb, "generation_uid", uid, str);
2185 SET_UID_METADATA(pb, "uid", uid, str);
2191 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2193 MXFContext *mxf = arg;
2194 AVFormatContext *s = mxf->fc;
2198 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2199 SET_STR_METADATA(pb, "project_name", str);
2204 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2205 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2206 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2207 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2208 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2209 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2210 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2211 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2212 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2213 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2214 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2215 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2216 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2217 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2218 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2219 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2220 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2221 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2222 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2223 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2224 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2225 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2226 { { 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 */
2227 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2228 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2229 { { 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 */
2230 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2231 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2232 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2233 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5c,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VANC/VBI - SMPTE 436M */
2234 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2235 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2236 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2237 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2238 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2239 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2240 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2241 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2244 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2247 case MultipleDescriptor:
2249 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2250 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2258 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2260 AVIOContext *pb = mxf->fc->pb;
2261 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2262 uint64_t klv_end = avio_tell(pb) + klv->length;
2265 return AVERROR(ENOMEM);
2266 mxf_metadataset_init(ctx, type);
2267 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2269 int tag = avio_rb16(pb);
2270 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2271 uint64_t next = avio_tell(pb) + size;
2274 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
2275 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2276 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2279 if (tag > 0x7FFF) { /* dynamic tag */
2281 for (i = 0; i < mxf->local_tags_count; i++) {
2282 int local_tag = AV_RB16(mxf->local_tags+i*18);
2283 if (local_tag == tag) {
2284 memcpy(uid, mxf->local_tags+i*18+2, 16);
2285 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
2286 PRINT_KEY(mxf->fc, "uid", uid);
2290 if (ctx_size && tag == 0x3C0A) {
2291 avio_read(pb, ctx->uid, 16);
2292 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2293 mxf_free_metadataset(&ctx, !!ctx_size);
2297 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2298 * it extending past the end of the KLV though (zzuf5.mxf). */
2299 if (avio_tell(pb) > klv_end) {
2302 mxf_free_metadataset(&ctx, !!ctx_size);
2305 av_log(mxf->fc, AV_LOG_ERROR,
2306 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2308 return AVERROR_INVALIDDATA;
2309 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2310 avio_seek(pb, next, SEEK_SET);
2312 if (ctx_size) ctx->type = type;
2313 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2317 * Matches any partition pack key, in other words:
2321 * @return non-zero if the key is a partition pack key, zero otherwise
2323 static int mxf_is_partition_pack_key(UID key)
2325 //NOTE: this is a little lax since it doesn't constraint key[14]
2326 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2327 key[13] >= 2 && key[13] <= 4;
2331 * Parses a metadata KLV
2332 * @return <0 on error, 0 otherwise
2334 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2335 int ctx_size, enum MXFMetadataSetType type)
2337 AVFormatContext *s = mxf->fc;
2339 if (klv.key[5] == 0x53) {
2340 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2342 uint64_t next = avio_tell(s->pb) + klv.length;
2343 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2345 /* only seek forward, else this can loop for a long time */
2346 if (avio_tell(s->pb) > next) {
2347 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2349 return AVERROR_INVALIDDATA;
2352 avio_seek(s->pb, next, SEEK_SET);
2355 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2362 * Seeks to the previous partition and parses it, if possible
2363 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2365 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2367 AVIOContext *pb = mxf->fc->pb;
2369 int64_t current_partition_ofs;
2372 if (!mxf->current_partition ||
2373 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2374 return 0; /* we've parsed all partitions */
2376 /* seek to previous partition */
2377 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2378 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2379 mxf->current_partition = NULL;
2381 av_dlog(mxf->fc, "seeking to previous partition\n");
2383 /* Make sure this is actually a PartitionPack, and if so parse it.
2386 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2387 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2391 if (!mxf_is_partition_pack_key(klv.key)) {
2392 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2393 return AVERROR_INVALIDDATA;
2396 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2397 * can point to just before the current partition, causing klv_read_packet()
2398 * to sync back up to it. See deadlock3.mxf
2400 if (klv.offset >= current_partition_ofs) {
2401 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2402 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2403 return AVERROR_INVALIDDATA;
2406 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2413 * Called when essence is encountered
2414 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2416 static int mxf_parse_handle_essence(MXFContext *mxf)
2418 AVIOContext *pb = mxf->fc->pb;
2421 if (mxf->parsing_backward) {
2422 return mxf_seek_to_previous_partition(mxf);
2424 if (!mxf->footer_partition) {
2425 av_dlog(mxf->fc, "no FooterPartition\n");
2429 av_dlog(mxf->fc, "seeking to FooterPartition\n");
2431 /* remember where we were so we don't end up seeking further back than this */
2432 mxf->last_forward_tell = avio_tell(pb);
2434 if (!pb->seekable) {
2435 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2439 /* seek to FooterPartition and parse backward */
2440 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2441 av_log(mxf->fc, AV_LOG_ERROR,
2442 "failed to seek to FooterPartition @ 0x%" PRIx64
2443 " (%"PRId64") - partial file?\n",
2444 mxf->run_in + mxf->footer_partition, ret);
2448 mxf->current_partition = NULL;
2449 mxf->parsing_backward = 1;
2456 * Called when the next partition or EOF is encountered
2457 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2459 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2461 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2465 * Figures out the proper offset and length of the essence container in each partition
2467 static void mxf_compute_essence_containers(MXFContext *mxf)
2471 /* everything is already correct */
2472 if (mxf->op == OPAtom)
2475 for (x = 0; x < mxf->partitions_count; x++) {
2476 MXFPartition *p = &mxf->partitions[x];
2479 continue; /* BodySID == 0 -> no essence */
2481 if (x >= mxf->partitions_count - 1)
2482 break; /* FooterPartition - can't compute length (and we don't need to) */
2484 /* essence container spans to the next partition */
2485 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2487 if (p->essence_length < 0) {
2488 /* next ThisPartition < essence_offset */
2489 p->essence_length = 0;
2490 av_log(mxf->fc, AV_LOG_ERROR,
2491 "partition %i: bad ThisPartition = %"PRIX64"\n",
2492 x+1, mxf->partitions[x+1].this_partition);
2497 static int64_t round_to_kag(int64_t position, int kag_size)
2499 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2500 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2501 int64_t ret = (position / kag_size) * kag_size;
2502 return ret == position ? ret : ret + kag_size;
2505 static int is_pcm(enum AVCodecID codec_id)
2507 /* we only care about "normal" PCM codecs until we get samples */
2508 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2512 * Deal with the case where for some audio atoms EditUnitByteCount is
2513 * very small (2, 4..). In those cases we should read more than one
2514 * sample per call to mxf_read_packet().
2516 static void mxf_handle_small_eubc(AVFormatContext *s)
2518 MXFContext *mxf = s->priv_data;
2520 /* assuming non-OPAtom == frame wrapped
2521 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2522 if (mxf->op != OPAtom)
2525 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2526 if (s->nb_streams != 1 ||
2527 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2528 !is_pcm(s->streams[0]->codec->codec_id) ||
2529 mxf->nb_index_tables != 1 ||
2530 mxf->index_tables[0].nb_segments != 1 ||
2531 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2534 /* arbitrarily default to 48 kHz PAL audio frame size */
2535 /* TODO: We could compute this from the ratio between the audio
2536 * and video edit rates for 48 kHz NTSC we could use the
2537 * 1802-1802-1802-1802-1801 pattern. */
2538 mxf->edit_units_per_packet = 1920;
2542 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2544 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2546 AVFormatContext *s = mxf->fc;
2547 AVStream *st = NULL;
2548 MXFIndexTableSegment *segment = NULL;
2549 MXFPartition *p = NULL;
2550 int essence_partition_count = 0;
2553 if (mxf->op != OPAtom)
2556 /* TODO: support raw video without a index if they exist */
2557 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2560 /* check if file already has a IndexTableSegment */
2561 for (i = 0; i < mxf->metadata_sets_count; i++) {
2562 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2566 /* find the essence partition */
2567 for (i = 0; i < mxf->partitions_count; i++) {
2568 /* BodySID == 0 -> no essence */
2569 if (!mxf->partitions[i].body_sid)
2572 p = &mxf->partitions[i];
2573 essence_partition_count++;
2576 /* only handle files with a single essence partition */
2577 if (essence_partition_count != 1)
2580 if (!(segment = av_mallocz(sizeof(*segment))))
2581 return AVERROR(ENOMEM);
2583 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2584 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2589 segment->type = IndexTableSegment;
2590 /* stream will be treated as small EditUnitByteCount */
2591 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2592 segment->index_start_position = 0;
2593 segment->index_duration = s->streams[0]->duration;
2594 segment->index_sid = p->index_sid;
2595 segment->body_sid = p->body_sid;
2599 static void mxf_read_random_index_pack(AVFormatContext *s)
2601 MXFContext *mxf = s->priv_data;
2603 int64_t file_size, max_rip_length, min_rip_length;
2606 if (!s->pb->seekable)
2609 file_size = avio_size(s->pb);
2611 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2612 * The limit below assumes a file with nothing but partition packs and a RIP.
2613 * Before changing this, consider that a muxer may place each sample in its own partition.
2615 * 105 is the size of the smallest possible PartitionPack
2616 * 12 is the size of each RIP entry
2617 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2619 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2620 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2622 /* We're only interested in RIPs with at least two entries.. */
2623 min_rip_length = 16+1+24+4;
2625 /* See S377m section 11 */
2626 avio_seek(s->pb, file_size - 4, SEEK_SET);
2627 length = avio_rb32(s->pb);
2629 if (length < min_rip_length || length > max_rip_length)
2631 avio_seek(s->pb, file_size - length, SEEK_SET);
2632 if (klv_read_packet(&klv, s->pb) < 0 ||
2633 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2634 klv.length != length - 20)
2637 avio_skip(s->pb, klv.length - 12);
2638 mxf->footer_partition = avio_rb64(s->pb);
2641 if (mxf->run_in + mxf->footer_partition >= file_size) {
2642 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2643 mxf->footer_partition = 0;
2647 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2650 static int mxf_read_header(AVFormatContext *s)
2652 MXFContext *mxf = s->priv_data;
2654 int64_t essence_offset = 0;
2657 mxf->last_forward_tell = INT64_MAX;
2658 mxf->edit_units_per_packet = 1;
2660 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2661 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2662 return AVERROR_INVALIDDATA;
2664 avio_seek(s->pb, -14, SEEK_CUR);
2666 mxf->run_in = avio_tell(s->pb);
2668 mxf_read_random_index_pack(s);
2670 while (!avio_feof(s->pb)) {
2671 const MXFMetadataReadTableEntry *metadata;
2673 if (klv_read_packet(&klv, s->pb) < 0) {
2674 /* EOF - seek to previous partition or stop */
2675 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2681 PRINT_KEY(s, "read header", klv.key);
2682 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2683 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2684 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2685 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2686 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2688 if (!mxf->current_partition) {
2689 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2690 return AVERROR_INVALIDDATA;
2693 if (!mxf->current_partition->essence_offset) {
2694 /* for OP1a we compute essence_offset
2695 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2696 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2697 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2699 int64_t op1a_essence_offset =
2700 round_to_kag(mxf->current_partition->this_partition +
2701 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2702 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2703 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2705 if (mxf->op == OPAtom) {
2706 /* point essence_offset to the actual data
2707 * OPAtom has all the essence in one big KLV
2709 mxf->current_partition->essence_offset = avio_tell(s->pb);
2710 mxf->current_partition->essence_length = klv.length;
2712 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2713 mxf->current_partition->essence_offset = op1a_essence_offset;
2717 if (!essence_offset)
2718 essence_offset = klv.offset;
2720 /* seek to footer, previous partition or stop */
2721 if (mxf_parse_handle_essence(mxf) <= 0)
2724 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2725 /* next partition pack - keep going, seek to previous partition or stop */
2726 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2728 else if (mxf->parsing_backward)
2730 /* we're still parsing forward. proceed to parsing this partition pack */
2733 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2734 if (IS_KLV_KEY(klv.key, metadata->key)) {
2735 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2739 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2743 if (!metadata->read)
2744 avio_skip(s->pb, klv.length);
2746 /* FIXME avoid seek */
2747 if (!essence_offset) {
2748 av_log(s, AV_LOG_ERROR, "no essence\n");
2749 ret = AVERROR_INVALIDDATA;
2752 avio_seek(s->pb, essence_offset, SEEK_SET);
2754 mxf_compute_essence_containers(mxf);
2756 /* we need to do this before computing the index tables
2757 * to be able to fill in zero IndexDurations with st->duration */
2758 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2761 mxf_handle_missing_index_segment(mxf);
2762 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2765 if (mxf->nb_index_tables > 1) {
2766 /* TODO: look up which IndexSID to use via EssenceContainerData */
2767 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2768 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2769 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2770 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2771 ret = AVERROR_INVALIDDATA;
2775 mxf_handle_small_eubc(s);
2785 * Sets mxf->current_edit_unit based on what offset we're currently at.
2786 * @return next_ofs if OK, <0 on error
2788 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2790 int64_t last_ofs = -1, next_ofs = -1;
2791 MXFIndexTable *t = &mxf->index_tables[0];
2793 /* this is called from the OP1a demuxing logic, which means there
2794 * may be no index tables */
2795 if (mxf->nb_index_tables <= 0)
2798 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2799 while (mxf->current_edit_unit >= 0) {
2800 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2803 if (next_ofs <= last_ofs) {
2804 /* large next_ofs didn't change or current_edit_unit wrapped
2805 * around this fixes the infinite loop on zzuf3.mxf */
2806 av_log(mxf->fc, AV_LOG_ERROR,
2807 "next_ofs didn't change. not deriving packet timestamps\n");
2811 if (next_ofs > current_offset)
2814 last_ofs = next_ofs;
2815 mxf->current_edit_unit++;
2818 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2819 if (mxf->current_edit_unit < 0)
2825 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2826 uint64_t *sample_count)
2828 int i, total = 0, size = 0;
2829 AVStream *st = mxf->fc->streams[stream_index];
2830 MXFTrack *track = st->priv_data;
2831 AVRational time_base = av_inv_q(track->edit_rate);
2832 AVRational sample_rate = av_inv_q(st->time_base);
2833 const MXFSamplesPerFrame *spf = NULL;
2835 if ((sample_rate.num / sample_rate.den) == 48000)
2836 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2838 int remainder = (sample_rate.num * time_base.num) %
2839 (time_base.den * sample_rate.den);
2840 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2841 av_mul_q(sample_rate, time_base)));
2843 av_log(mxf->fc, AV_LOG_WARNING,
2844 "seeking detected on stream #%d with time base (%d/%d) and "
2845 "sample rate (%d/%d), audio pts won't be accurate.\n",
2846 stream_index, time_base.num, time_base.den,
2847 sample_rate.num, sample_rate.den);
2851 while (spf->samples_per_frame[size]) {
2852 total += spf->samples_per_frame[size];
2858 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2859 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2860 *sample_count += spf->samples_per_frame[i];
2866 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2869 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2870 int64_t bits_per_sample = codec->bits_per_coded_sample;
2872 if (!bits_per_sample)
2873 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2875 pkt->pts = track->sample_count;
2877 if ( codec->channels <= 0
2878 || bits_per_sample <= 0
2879 || codec->channels * (int64_t)bits_per_sample < 8)
2880 return AVERROR(EINVAL);
2881 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2885 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2888 MXFContext *mxf = s->priv_data;
2891 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2892 PRINT_KEY(s, "read packet", klv.key);
2893 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2894 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2895 ret = mxf_decrypt_triplet(s, pkt, &klv);
2897 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2902 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2903 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2904 int index = mxf_get_stream_index(s, &klv);
2905 int64_t next_ofs, next_klv;
2908 AVCodecContext *codec;
2911 av_log(s, AV_LOG_ERROR,
2912 "error getting stream index %"PRIu32"\n",
2913 AV_RB32(klv.key + 12));
2917 st = s->streams[index];
2918 track = st->priv_data;
2920 if (s->streams[index]->discard == AVDISCARD_ALL)
2923 next_klv = avio_tell(s->pb) + klv.length;
2924 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2926 if (next_ofs >= 0 && next_klv > next_ofs) {
2927 /* if this check is hit then it's possible OPAtom was treated as OP1a
2928 * truncate the packet since it's probably very large (>2 GiB is common) */
2929 avpriv_request_sample(s,
2930 "OPAtom misinterpreted as OP1a?"
2931 "KLV for edit unit %i extending into "
2933 mxf->current_edit_unit);
2934 klv.length = next_ofs - avio_tell(s->pb);
2937 /* check for 8 channels AES3 element */
2938 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2939 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2942 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2946 ret = av_get_packet(s->pb, pkt, klv.length);
2950 pkt->stream_index = index;
2951 pkt->pos = klv.offset;
2955 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2956 /* mxf->current_edit_unit good - see if we have an
2957 * index table to derive timestamps from */
2958 MXFIndexTable *t = &mxf->index_tables[0];
2960 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2961 pkt->dts = mxf->current_edit_unit + t->first_dts;
2962 pkt->pts = t->ptses[mxf->current_edit_unit];
2963 } else if (track->intra_only) {
2964 /* intra-only -> PTS = EditUnit.
2965 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2966 pkt->pts = mxf->current_edit_unit;
2968 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2969 ret = mxf_set_audio_pts(mxf, codec, pkt);
2974 /* seek for truncated packets */
2975 avio_seek(s->pb, next_klv, SEEK_SET);
2980 avio_skip(s->pb, klv.length);
2982 return avio_feof(s->pb) ? AVERROR_EOF : ret;
2985 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2987 MXFContext *mxf = s->priv_data;
2989 int64_t ret64, pos, next_pos;
2994 if (mxf->op != OPAtom)
2995 return mxf_read_packet_old(s, pkt);
2997 /* OPAtom - clip wrapped demuxing */
2998 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3000 t = &mxf->index_tables[0];
3002 if (mxf->current_edit_unit >= st->duration)
3005 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3007 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3010 /* compute size by finding the next edit unit or the end of the essence container
3011 * not pretty, but it works */
3012 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3013 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3014 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3015 return AVERROR_INVALIDDATA;
3018 if ((size = next_pos - pos) <= 0) {
3019 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3020 return AVERROR_INVALIDDATA;
3023 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3026 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3029 pkt->stream_index = 0;
3031 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3032 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3033 pkt->dts = mxf->current_edit_unit + t->first_dts;
3034 pkt->pts = t->ptses[mxf->current_edit_unit];
3035 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3036 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3041 mxf->current_edit_unit += edit_units;
3046 static int mxf_read_close(AVFormatContext *s)
3048 MXFContext *mxf = s->priv_data;
3051 av_freep(&mxf->packages_refs);
3053 for (i = 0; i < s->nb_streams; i++)
3054 s->streams[i]->priv_data = NULL;
3056 for (i = 0; i < mxf->metadata_sets_count; i++) {
3057 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3059 av_freep(&mxf->partitions);
3060 av_freep(&mxf->metadata_sets);
3061 av_freep(&mxf->aesc);
3062 av_freep(&mxf->local_tags);
3064 if (mxf->index_tables) {
3065 for (i = 0; i < mxf->nb_index_tables; i++) {
3066 av_freep(&mxf->index_tables[i].segments);
3067 av_freep(&mxf->index_tables[i].ptses);
3068 av_freep(&mxf->index_tables[i].fake_index);
3071 av_freep(&mxf->index_tables);
3076 static int mxf_probe(AVProbeData *p) {
3077 const uint8_t *bufp = p->buf;
3078 const uint8_t *end = p->buf + p->buf_size;
3080 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3083 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3084 end -= sizeof(mxf_header_partition_pack_key);
3086 for (; bufp < end;) {
3087 if (!((bufp[13] - 1) & 0xF2)){
3088 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3089 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3090 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3091 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3092 return AVPROBE_SCORE_MAX;
3101 /* rudimentary byte seek */
3102 /* XXX: use MXF Index */
3103 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3105 AVStream *st = s->streams[stream_index];
3107 MXFContext* mxf = s->priv_data;
3111 MXFTrack *source_track = st->priv_data;
3113 /* if audio then truncate sample_time to EditRate */
3114 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3115 sample_time = av_rescale_q(sample_time, st->time_base,
3116 av_inv_q(source_track->edit_rate));
3118 if (mxf->nb_index_tables <= 0) {
3120 return AVERROR_INVALIDDATA;
3121 if (sample_time < 0)
3123 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3125 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3129 ff_update_cur_dts(s, st, sample_time);
3130 mxf->current_edit_unit = sample_time;
3132 t = &mxf->index_tables[0];
3134 /* clamp above zero, else ff_index_search_timestamp() returns negative
3135 * this also means we allow seeking before the start */
3136 sample_time = FFMAX(sample_time, 0);
3138 if (t->fake_index) {
3139 /* behave as if we have a proper index */
3140 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3143 /* no IndexEntryArray (one or more CBR segments)
3144 * make sure we don't seek past the end */
3145 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3148 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3151 ff_update_cur_dts(s, st, sample_time);
3152 mxf->current_edit_unit = sample_time;
3153 avio_seek(s->pb, seekpos, SEEK_SET);
3156 // Update all tracks sample count
3157 for (i = 0; i < s->nb_streams; i++) {
3158 AVStream *cur_st = s->streams[i];
3159 MXFTrack *cur_track = cur_st->priv_data;
3160 uint64_t current_sample_count = 0;
3161 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3162 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3166 cur_track->sample_count = current_sample_count;
3172 AVInputFormat ff_mxf_demuxer = {
3174 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3175 .priv_data_size = sizeof(MXFContext),
3176 .read_probe = mxf_probe,
3177 .read_header = mxf_read_header,
3178 .read_packet = mxf_read_packet,
3179 .read_close = mxf_read_close,
3180 .read_seek = mxf_read_seek,