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);
319 av_freep(&((MXFPackage *)*ctx)->comment_refs);
322 av_freep(&((MXFTaggedValue *)*ctx)->name);
323 av_freep(&((MXFTaggedValue *)*ctx)->value);
325 case IndexTableSegment:
326 seg = (MXFIndexTableSegment *)*ctx;
327 av_freep(&seg->temporal_offset_entries);
328 av_freep(&seg->flag_entries);
329 av_freep(&seg->stream_offset_entries);
337 static int64_t klv_decode_ber_length(AVIOContext *pb)
339 uint64_t size = avio_r8(pb);
340 if (size & 0x80) { /* long form */
341 int bytes_num = size & 0x7f;
342 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
344 return AVERROR_INVALIDDATA;
347 size = size << 8 | avio_r8(pb);
352 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
355 for (i = 0; i < size && !avio_feof(pb); i++) {
359 else if (b != key[i])
365 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
367 if (!mxf_read_sync(pb, mxf_klv_key, 4))
368 return AVERROR_INVALIDDATA;
369 klv->offset = avio_tell(pb) - 4;
370 memcpy(klv->key, mxf_klv_key, 4);
371 avio_read(pb, klv->key + 4, 12);
372 klv->length = klv_decode_ber_length(pb);
373 return klv->length == -1 ? -1 : 0;
376 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
380 for (i = 0; i < s->nb_streams; i++) {
381 MXFTrack *track = s->streams[i]->priv_data;
383 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
386 /* return 0 if only one stream, for OP Atom files with 0 as track number */
387 return s->nb_streams == 1 ? 0 : -1;
390 /* XXX: use AVBitStreamFilter */
391 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
393 const uint8_t *buf_ptr, *end_ptr;
397 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
398 return AVERROR_INVALIDDATA;
399 length = av_get_packet(pb, pkt, length);
402 data_ptr = pkt->data;
403 end_ptr = pkt->data + length;
404 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
405 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
406 for (i = 0; i < st->codec->channels; i++) {
407 uint32_t sample = bytestream_get_le32(&buf_ptr);
408 if (st->codec->bits_per_coded_sample == 24)
409 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
411 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
413 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
415 av_shrink_packet(pkt, data_ptr - pkt->data);
419 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
421 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
422 MXFContext *mxf = s->priv_data;
423 AVIOContext *pb = s->pb;
424 int64_t end = avio_tell(pb) + klv->length;
427 uint64_t plaintext_size;
432 if (!mxf->aesc && s->key && s->keylen == 16) {
433 mxf->aesc = av_aes_alloc();
435 return AVERROR(ENOMEM);
436 av_aes_init(mxf->aesc, s->key, 128, 1);
439 avio_skip(pb, klv_decode_ber_length(pb));
441 klv_decode_ber_length(pb);
442 plaintext_size = avio_rb64(pb);
444 klv_decode_ber_length(pb);
445 avio_read(pb, klv->key, 16);
446 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
447 return AVERROR_INVALIDDATA;
448 index = mxf_get_stream_index(s, klv);
450 return AVERROR_INVALIDDATA;
452 klv_decode_ber_length(pb);
453 orig_size = avio_rb64(pb);
454 if (orig_size < plaintext_size)
455 return AVERROR_INVALIDDATA;
457 size = klv_decode_ber_length(pb);
458 if (size < 32 || size - 32 < orig_size)
459 return AVERROR_INVALIDDATA;
460 avio_read(pb, ivec, 16);
461 avio_read(pb, tmpbuf, 16);
463 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
464 if (memcmp(tmpbuf, checkv, 16))
465 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
467 size = av_get_packet(pb, pkt, size);
470 else if (size < plaintext_size)
471 return AVERROR_INVALIDDATA;
472 size -= plaintext_size;
474 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
475 &pkt->data[plaintext_size], size >> 4, ivec, 1);
476 av_shrink_packet(pkt, orig_size);
477 pkt->stream_index = index;
478 avio_skip(pb, end - avio_tell(pb));
482 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
484 MXFContext *mxf = arg;
485 int item_num = avio_rb32(pb);
486 int item_len = avio_rb32(pb);
488 if (item_len != 18) {
489 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
490 return AVERROR_PATCHWELCOME;
492 if (item_num > 65536) {
493 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
494 return AVERROR_INVALIDDATA;
497 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
498 av_free(mxf->local_tags);
499 mxf->local_tags_count = 0;
500 mxf->local_tags = av_calloc(item_num, item_len);
501 if (!mxf->local_tags)
502 return AVERROR(ENOMEM);
503 mxf->local_tags_count = item_num;
504 avio_read(pb, mxf->local_tags, item_num*item_len);
508 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
510 MXFContext *mxf = arg;
511 MXFPartition *partition, *tmp_part;
513 uint64_t footer_partition;
514 uint32_t nb_essence_containers;
516 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
518 return AVERROR(ENOMEM);
519 mxf->partitions = tmp_part;
521 if (mxf->parsing_backward) {
522 /* insert the new partition pack in the middle
523 * this makes the entries in mxf->partitions sorted by offset */
524 memmove(&mxf->partitions[mxf->last_forward_partition+1],
525 &mxf->partitions[mxf->last_forward_partition],
526 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
527 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
529 mxf->last_forward_partition++;
530 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
533 memset(partition, 0, sizeof(*partition));
534 mxf->partitions_count++;
535 partition->pack_length = avio_tell(pb) - klv_offset + size;
536 partition->pack_ofs = klv_offset;
540 partition->type = Header;
543 partition->type = BodyPartition;
546 partition->type = Footer;
549 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
550 return AVERROR_INVALIDDATA;
553 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
554 partition->closed = partition->type == Footer || !(uid[14] & 1);
555 partition->complete = uid[14] > 2;
557 partition->kag_size = avio_rb32(pb);
558 partition->this_partition = avio_rb64(pb);
559 partition->previous_partition = avio_rb64(pb);
560 footer_partition = avio_rb64(pb);
561 partition->header_byte_count = avio_rb64(pb);
562 partition->index_byte_count = avio_rb64(pb);
563 partition->index_sid = avio_rb32(pb);
565 partition->body_sid = avio_rb32(pb);
566 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
567 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
568 return AVERROR_INVALIDDATA;
570 nb_essence_containers = avio_rb32(pb);
572 if (partition->this_partition &&
573 partition->previous_partition == partition->this_partition) {
574 av_log(mxf->fc, AV_LOG_ERROR,
575 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
576 partition->previous_partition);
577 /* override with the actual previous partition offset */
578 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
580 mxf->partitions + mxf->last_forward_partition - 2;
581 partition->previous_partition = prev->this_partition;
583 /* if no previous body partition are found point to the header
585 if (partition->previous_partition == partition->this_partition)
586 partition->previous_partition = 0;
587 av_log(mxf->fc, AV_LOG_ERROR,
588 "Overriding PreviousPartition with %"PRIx64"\n",
589 partition->previous_partition);
592 /* some files don'thave FooterPartition set in every partition */
593 if (footer_partition) {
594 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
595 av_log(mxf->fc, AV_LOG_ERROR,
596 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
597 mxf->footer_partition, footer_partition);
599 mxf->footer_partition = footer_partition;
603 av_log(mxf->fc, AV_LOG_TRACE,
604 "PartitionPack: ThisPartition = 0x%"PRIX64
605 ", PreviousPartition = 0x%"PRIX64", "
606 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
607 partition->this_partition,
608 partition->previous_partition, footer_partition,
609 partition->index_sid, partition->body_sid);
611 /* sanity check PreviousPartition if set */
612 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
613 if (partition->previous_partition &&
614 mxf->run_in + partition->previous_partition >= klv_offset) {
615 av_log(mxf->fc, AV_LOG_ERROR,
616 "PreviousPartition points to this partition or forward\n");
617 return AVERROR_INVALIDDATA;
620 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
621 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
622 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
623 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
624 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
625 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
626 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
627 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
628 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
629 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
630 else if (op[12] == 0x10) {
631 /* SMPTE 390m: "There shall be exactly one essence container"
632 * The following block deals with files that violate this, namely:
633 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
634 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
635 if (nb_essence_containers != 1) {
636 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
640 av_log(mxf->fc, AV_LOG_WARNING,
641 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
642 nb_essence_containers,
643 op == OP1a ? "OP1a" : "OPAtom");
649 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
653 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
654 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
655 partition->kag_size);
657 if (mxf->op == OPSONYOpt)
658 partition->kag_size = 512;
660 partition->kag_size = 1;
662 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
668 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
670 MXFMetadataSet **tmp;
672 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
674 return AVERROR(ENOMEM);
675 mxf->metadata_sets = tmp;
676 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
677 mxf->metadata_sets_count++;
681 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
683 MXFCryptoContext *cryptocontext = arg;
685 return AVERROR_INVALIDDATA;
686 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
687 avio_read(pb, cryptocontext->source_container_ul, 16);
691 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
693 *count = avio_rb32(pb);
694 *refs = av_calloc(*count, sizeof(UID));
697 return AVERROR(ENOMEM);
699 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
700 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
704 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
706 MXFContext *mxf = arg;
709 if (mxf->packages_refs)
710 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
711 av_free(mxf->packages_refs);
712 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
717 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
719 MXFStructuralComponent *source_clip = arg;
722 source_clip->duration = avio_rb64(pb);
725 source_clip->start_position = avio_rb64(pb);
728 /* UMID, only get last 16 bytes */
730 avio_read(pb, source_clip->source_package_uid, 16);
733 source_clip->source_track_id = avio_rb32(pb);
739 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
741 MXFTimecodeComponent *mxf_timecode = arg;
744 mxf_timecode->start_frame = avio_rb64(pb);
747 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
750 mxf_timecode->drop_frame = avio_r8(pb);
756 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
758 MXFPulldownComponent *mxf_pulldown = arg;
761 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
767 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
769 MXFTrack *track = arg;
772 track->track_id = avio_rb32(pb);
775 avio_read(pb, track->track_number, 4);
778 track->edit_rate.num = avio_rb32(pb);
779 track->edit_rate.den = avio_rb32(pb);
782 avio_read(pb, track->sequence_ref, 16);
788 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
790 MXFSequence *sequence = arg;
793 sequence->duration = avio_rb64(pb);
796 avio_read(pb, sequence->data_definition_ul, 16);
799 sequence->origin = avio_r8(pb);
802 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
803 &sequence->structural_components_count);
808 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
810 MXFEssenceGroup *essence_group = arg;
813 essence_group->duration = avio_rb64(pb);
816 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
817 &essence_group->structural_components_count);
822 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
828 return AVERROR(EINVAL);
830 buf_size = size + size / 2 + 1;
831 *str = av_malloc(buf_size);
833 return AVERROR(ENOMEM);
836 ret = avio_get_str16be(pb, size, *str, buf_size);
838 ret = avio_get_str16le(pb, size, *str, buf_size);
848 #define READ_STR16(type, big_endian) \
849 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
851 return mxf_read_utf16_string(pb, size, str, big_endian); \
857 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
859 MXFPackage *package = arg;
862 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
863 &package->tracks_count);
866 avio_read(pb, package->package_ul, 16);
867 avio_read(pb, package->package_uid, 16);
870 avio_read(pb, package->descriptor_ref, 16);
873 return mxf_read_utf16be_string(pb, size, &package->name);
875 return mxf_read_strong_ref_array(pb, &package->comment_refs,
876 &package->comment_count);
881 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
885 segment->nb_index_entries = avio_rb32(pb);
887 length = avio_rb32(pb);
889 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
890 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
891 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
892 av_freep(&segment->temporal_offset_entries);
893 av_freep(&segment->flag_entries);
894 return AVERROR(ENOMEM);
897 for (i = 0; i < segment->nb_index_entries; i++) {
898 segment->temporal_offset_entries[i] = avio_r8(pb);
899 avio_r8(pb); /* KeyFrameOffset */
900 segment->flag_entries[i] = avio_r8(pb);
901 segment->stream_offset_entries[i] = avio_rb64(pb);
902 avio_skip(pb, length - 11);
907 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
909 MXFIndexTableSegment *segment = arg;
912 segment->edit_unit_byte_count = avio_rb32(pb);
913 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
916 segment->index_sid = avio_rb32(pb);
917 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
920 segment->body_sid = avio_rb32(pb);
921 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
924 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
925 return mxf_read_index_entry_array(pb, segment);
927 segment->index_edit_rate.num = avio_rb32(pb);
928 segment->index_edit_rate.den = avio_rb32(pb);
929 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
930 segment->index_edit_rate.den);
933 segment->index_start_position = avio_rb64(pb);
934 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
937 segment->index_duration = avio_rb64(pb);
938 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
944 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
946 int code, value, ofs = 0;
947 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
952 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
955 layout[ofs++] = code;
956 layout[ofs++] = value;
958 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
959 } while (code != 0); /* SMPTE 377M E.2.46 */
961 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
964 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
966 MXFDescriptor *descriptor = arg;
969 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
970 &descriptor->sub_descriptors_count);
971 case 0x3002: /* ContainerDuration */
972 descriptor->duration = avio_rb64(pb);
975 avio_read(pb, descriptor->essence_container_ul, 16);
978 descriptor->linked_track_id = avio_rb32(pb);
980 case 0x3201: /* PictureEssenceCoding */
981 avio_read(pb, descriptor->essence_codec_ul, 16);
984 descriptor->width = avio_rb32(pb);
987 descriptor->height = avio_rb32(pb);
990 descriptor->frame_layout = avio_r8(pb);
993 descriptor->aspect_ratio.num = avio_rb32(pb);
994 descriptor->aspect_ratio.den = avio_rb32(pb);
997 descriptor->field_dominance = avio_r8(pb);
1000 descriptor->component_depth = avio_rb32(pb);
1003 descriptor->horiz_subsampling = avio_rb32(pb);
1006 descriptor->vert_subsampling = avio_rb32(pb);
1009 descriptor->sample_rate.num = avio_rb32(pb);
1010 descriptor->sample_rate.den = avio_rb32(pb);
1012 case 0x3D06: /* SoundEssenceCompression */
1013 avio_read(pb, descriptor->essence_codec_ul, 16);
1016 descriptor->channels = avio_rb32(pb);
1019 descriptor->bits_per_sample = avio_rb32(pb);
1022 mxf_read_pixel_layout(pb, descriptor);
1025 /* Private uid used by SONY C0023S01.mxf */
1026 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1027 if (descriptor->extradata)
1028 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1029 av_free(descriptor->extradata);
1030 descriptor->extradata_size = 0;
1031 descriptor->extradata = av_malloc(size);
1032 if (!descriptor->extradata)
1033 return AVERROR(ENOMEM);
1034 descriptor->extradata_size = size;
1035 avio_read(pb, descriptor->extradata, size);
1037 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1038 uint32_t rsiz = avio_rb16(pb);
1039 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1040 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1041 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1048 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1050 MXFTaggedValue *tagged_value = arg;
1056 avio_read(pb, key, 17);
1057 /* TODO: handle other types of of indirect values */
1058 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1059 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1060 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1061 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1066 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1068 MXFTaggedValue *tagged_value = arg;
1071 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1073 return mxf_read_indirect_value(tagged_value, pb, size);
1079 * Match an uid independently of the version byte and up to len common bytes
1082 static int mxf_match_uid(const UID key, const UID uid, int len)
1085 for (i = 0; i < len; i++) {
1086 if (i != 7 && key[i] != uid[i])
1092 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1094 while (uls->uid[0]) {
1095 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1102 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1108 for (i = 0; i < mxf->metadata_sets_count; i++) {
1109 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1110 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1111 return mxf->metadata_sets[i];
1117 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1118 // video essence container uls
1119 { { 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 */
1120 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1121 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1122 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1123 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1126 /* EC ULs for intra-only formats */
1127 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1128 { { 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 */
1129 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1132 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1133 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1134 { { 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 */
1135 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1136 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1139 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1140 // sound essence container uls
1141 { { 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 */
1142 { { 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 */
1143 { { 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 */
1144 { { 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 */
1145 { { 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) */
1146 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1149 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1150 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1151 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1154 static const char* const mxf_data_essence_descriptor[] = {
1155 "vbi_vanc_smpte_436M",
1158 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1160 int i, j, nb_segments = 0;
1161 MXFIndexTableSegment **unsorted_segments;
1162 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1164 /* count number of segments, allocate arrays and copy unsorted segments */
1165 for (i = 0; i < mxf->metadata_sets_count; i++)
1166 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1170 return AVERROR_INVALIDDATA;
1172 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1173 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1174 av_freep(sorted_segments);
1175 av_free(unsorted_segments);
1176 return AVERROR(ENOMEM);
1179 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1180 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1181 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1183 *nb_sorted_segments = 0;
1185 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1186 for (i = 0; i < nb_segments; i++) {
1187 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1188 uint64_t best_index_duration = 0;
1190 for (j = 0; j < nb_segments; j++) {
1191 MXFIndexTableSegment *s = unsorted_segments[j];
1193 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1194 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1195 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1197 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1198 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1199 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1201 best_body_sid = s->body_sid;
1202 best_index_sid = s->index_sid;
1203 best_index_start = s->index_start_position;
1204 best_index_duration = s->index_duration;
1208 /* no suitable entry found -> we're done */
1212 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1213 last_body_sid = best_body_sid;
1214 last_index_sid = best_index_sid;
1215 last_index_start = best_index_start;
1218 av_free(unsorted_segments);
1224 * Computes the absolute file offset of the given essence container offset
1226 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1229 int64_t offset_in = offset; /* for logging */
1231 for (x = 0; x < mxf->partitions_count; x++) {
1232 MXFPartition *p = &mxf->partitions[x];
1234 if (p->body_sid != body_sid)
1237 if (offset < p->essence_length || !p->essence_length) {
1238 *offset_out = p->essence_offset + offset;
1242 offset -= p->essence_length;
1245 av_log(mxf->fc, AV_LOG_ERROR,
1246 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1247 offset_in, body_sid);
1249 return AVERROR_INVALIDDATA;
1253 * Returns the end position of the essence container with given BodySID, or zero if unknown
1255 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1260 for (x = 0; x < mxf->partitions_count; x++) {
1261 MXFPartition *p = &mxf->partitions[x];
1263 if (p->body_sid != body_sid)
1266 if (!p->essence_length)
1269 ret = p->essence_offset + p->essence_length;
1275 /* EditUnit -> absolute offset */
1276 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)
1279 int64_t offset_temp = 0;
1281 for (i = 0; i < index_table->nb_segments; i++) {
1282 MXFIndexTableSegment *s = index_table->segments[i];
1284 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1286 if (edit_unit < s->index_start_position + s->index_duration) {
1287 int64_t index = edit_unit - s->index_start_position;
1289 if (s->edit_unit_byte_count)
1290 offset_temp += s->edit_unit_byte_count * index;
1291 else if (s->nb_index_entries) {
1292 if (s->nb_index_entries == 2 * s->index_duration + 1)
1293 index *= 2; /* Avid index */
1295 if (index < 0 || index >= s->nb_index_entries) {
1296 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1297 index_table->index_sid, s->index_start_position);
1298 return AVERROR_INVALIDDATA;
1301 offset_temp = s->stream_offset_entries[index];
1303 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1304 index_table->index_sid, s->index_start_position);
1305 return AVERROR_INVALIDDATA;
1309 *edit_unit_out = edit_unit;
1311 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1313 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1314 offset_temp += s->edit_unit_byte_count * s->index_duration;
1319 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);
1321 return AVERROR_INVALIDDATA;
1324 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1327 int8_t max_temporal_offset = -128;
1329 /* first compute how many entries we have */
1330 for (i = 0; i < index_table->nb_segments; i++) {
1331 MXFIndexTableSegment *s = index_table->segments[i];
1333 if (!s->nb_index_entries) {
1334 index_table->nb_ptses = 0;
1335 return 0; /* no TemporalOffsets */
1338 index_table->nb_ptses += s->index_duration;
1341 /* paranoid check */
1342 if (index_table->nb_ptses <= 0)
1345 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1346 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1347 av_freep(&index_table->ptses);
1348 return AVERROR(ENOMEM);
1351 /* we may have a few bad TemporalOffsets
1352 * make sure the corresponding PTSes don't have the bogus value 0 */
1353 for (x = 0; x < index_table->nb_ptses; x++)
1354 index_table->ptses[x] = AV_NOPTS_VALUE;
1368 * We want to transform it into this:
1379 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1380 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1381 * The latter makes DTS <= PTS.
1383 for (i = x = 0; i < index_table->nb_segments; i++) {
1384 MXFIndexTableSegment *s = index_table->segments[i];
1385 int index_delta = 1;
1386 int n = s->nb_index_entries;
1388 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1389 index_delta = 2; /* Avid index */
1390 /* ignore the last entry - it's the size of the essence container */
1394 for (j = 0; j < n; j += index_delta, x++) {
1395 int offset = s->temporal_offset_entries[j] / index_delta;
1396 int index = x + offset;
1398 if (x >= index_table->nb_ptses) {
1399 av_log(mxf->fc, AV_LOG_ERROR,
1400 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1401 s->nb_index_entries, s->index_duration);
1405 index_table->fake_index[x].timestamp = x;
1406 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1408 if (index < 0 || index >= index_table->nb_ptses) {
1409 av_log(mxf->fc, AV_LOG_ERROR,
1410 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1415 index_table->ptses[index] = x;
1416 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1420 index_table->first_dts = -max_temporal_offset;
1426 * Sorts and collects index table segments into index tables.
1427 * Also computes PTSes if possible.
1429 static int mxf_compute_index_tables(MXFContext *mxf)
1431 int i, j, k, ret, nb_sorted_segments;
1432 MXFIndexTableSegment **sorted_segments = NULL;
1434 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1435 nb_sorted_segments <= 0) {
1436 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1440 /* sanity check and count unique BodySIDs/IndexSIDs */
1441 for (i = 0; i < nb_sorted_segments; i++) {
1442 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1443 mxf->nb_index_tables++;
1444 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1445 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1446 ret = AVERROR_INVALIDDATA;
1447 goto finish_decoding_index;
1451 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1452 sizeof(*mxf->index_tables));
1453 if (!mxf->index_tables) {
1454 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1455 ret = AVERROR(ENOMEM);
1456 goto finish_decoding_index;
1459 /* distribute sorted segments to index tables */
1460 for (i = j = 0; i < nb_sorted_segments; i++) {
1461 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1466 mxf->index_tables[j].nb_segments++;
1469 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1470 MXFIndexTable *t = &mxf->index_tables[j];
1472 t->segments = av_mallocz_array(t->nb_segments,
1473 sizeof(*t->segments));
1476 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1477 " pointer array\n");
1478 ret = AVERROR(ENOMEM);
1479 goto finish_decoding_index;
1482 if (sorted_segments[i]->index_start_position)
1483 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1484 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1486 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1487 t->index_sid = sorted_segments[i]->index_sid;
1488 t->body_sid = sorted_segments[i]->body_sid;
1490 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1491 goto finish_decoding_index;
1493 /* fix zero IndexDurations */
1494 for (k = 0; k < t->nb_segments; k++) {
1495 if (t->segments[k]->index_duration)
1498 if (t->nb_segments > 1)
1499 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1502 if (mxf->fc->nb_streams <= 0) {
1503 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1507 /* assume the first stream's duration is reasonable
1508 * leave index_duration = 0 on further segments in case we have any (unlikely)
1510 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1516 finish_decoding_index:
1517 av_free(sorted_segments);
1521 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1523 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1524 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1525 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1526 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1529 static int mxf_uid_to_str(UID uid, char **str)
1533 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1535 return AVERROR(ENOMEM);
1536 for (i = 0; i < sizeof(UID); i++) {
1537 snprintf(p, 2 + 1, "%.2x", uid[i]);
1539 if (i == 3 || i == 5 || i == 7 || i == 9) {
1540 snprintf(p, 1 + 1, "-");
1547 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1551 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1553 return AVERROR(ENOMEM);
1554 snprintf(p, 2 + 1, "0x");
1556 for (i = 0; i < sizeof(UID); i++) {
1557 snprintf(p, 2 + 1, "%.2X", ul[i]);
1561 for (i = 0; i < sizeof(UID); i++) {
1562 snprintf(p, 2 + 1, "%.2X", uid[i]);
1568 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1574 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1576 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1580 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1582 char buf[AV_TIMECODE_STR_SIZE];
1583 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1588 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1590 MXFStructuralComponent *component = NULL;
1591 MXFPulldownComponent *pulldown = NULL;
1593 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1597 switch (component->type) {
1598 case TimecodeComponent:
1599 return (MXFTimecodeComponent*)component;
1600 case PulldownComponent: /* timcode component may be located on a pulldown component */
1601 pulldown = (MXFPulldownComponent*)component;
1602 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1609 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1611 MXFPackage *package = NULL;
1614 for (i = 0; i < mxf->packages_count; i++) {
1615 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1619 if (!memcmp(package->package_uid, package_uid, 16))
1625 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1627 MXFDescriptor *sub_descriptor = NULL;
1633 if (descriptor->type == MultipleDescriptor) {
1634 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1635 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1637 if (!sub_descriptor) {
1638 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1641 if (sub_descriptor->linked_track_id == track_id) {
1642 return sub_descriptor;
1645 } else if (descriptor->type == Descriptor)
1651 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1653 MXFStructuralComponent *component = NULL;
1654 MXFPackage *package = NULL;
1655 MXFDescriptor *descriptor = NULL;
1658 if (!essence_group || !essence_group->structural_components_count)
1661 /* essence groups contains multiple representations of the same media,
1662 this return the first components with a valid Descriptor typically index 0 */
1663 for (i =0; i < essence_group->structural_components_count; i++){
1664 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1668 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1671 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1678 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1680 MXFStructuralComponent *component = NULL;
1682 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1685 switch (component->type) {
1689 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1696 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1698 MXFTaggedValue *tag;
1702 for (i = 0; i < package->comment_count; i++) {
1703 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1704 if (!tag || !tag->name || !tag->value)
1707 size = strlen(tag->name) + 8 + 1;
1708 key = av_mallocz(size);
1710 return AVERROR(ENOMEM);
1712 snprintf(key, size, "comment_%s", tag->name);
1713 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1718 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1720 MXFPackage *physical_package = NULL;
1721 MXFTrack *physical_track = NULL;
1722 MXFStructuralComponent *sourceclip = NULL;
1723 MXFTimecodeComponent *mxf_tc = NULL;
1727 int64_t start_position;
1729 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1730 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1734 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1737 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1739 /* the name of physical source package is name of the reel or tape */
1740 if (physical_package->name && physical_package->name[0])
1741 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1743 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1744 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1746 for (j = 0; j < physical_package->tracks_count; j++) {
1747 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1748 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1752 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1753 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1757 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1758 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1761 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1762 /* scale sourceclip start_position to match physical track edit rate */
1763 start_position = av_rescale_q(sourceclip->start_position,
1764 physical_track->edit_rate,
1765 source_track->edit_rate);
1767 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1768 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1778 static int mxf_parse_structural_metadata(MXFContext *mxf)
1780 MXFPackage *material_package = NULL;
1783 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1784 /* TODO: handle multiple material packages (OP3x) */
1785 for (i = 0; i < mxf->packages_count; i++) {
1786 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1787 if (material_package) break;
1789 if (!material_package) {
1790 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1791 return AVERROR_INVALIDDATA;
1794 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1795 if (material_package->name && material_package->name[0])
1796 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1797 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1799 for (i = 0; i < material_package->tracks_count; i++) {
1800 MXFPackage *source_package = NULL;
1801 MXFTrack *material_track = NULL;
1802 MXFTrack *source_track = NULL;
1803 MXFTrack *temp_track = NULL;
1804 MXFDescriptor *descriptor = NULL;
1805 MXFStructuralComponent *component = NULL;
1806 MXFTimecodeComponent *mxf_tc = NULL;
1807 UID *essence_container_ul = NULL;
1808 const MXFCodecUL *codec_ul = NULL;
1809 const MXFCodecUL *container_ul = NULL;
1810 const MXFCodecUL *pix_fmt_ul = NULL;
1815 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1816 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1820 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1821 mxf_tc = (MXFTimecodeComponent*)component;
1822 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1823 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1824 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1828 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1829 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1833 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1834 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1838 mxf_tc = (MXFTimecodeComponent*)component;
1839 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1840 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1841 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1846 /* TODO: handle multiple source clips */
1847 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1848 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1852 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1853 if (!source_package) {
1854 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1857 for (k = 0; k < source_package->tracks_count; k++) {
1858 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1859 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1860 ret = AVERROR_INVALIDDATA;
1863 if (temp_track->track_id == component->source_track_id) {
1864 source_track = temp_track;
1868 if (!source_track) {
1869 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1873 if (!source_track || !component)
1876 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1877 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1878 ret = AVERROR_INVALIDDATA;
1882 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1883 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1884 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1885 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1889 st = avformat_new_stream(mxf->fc, NULL);
1891 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1892 ret = AVERROR(ENOMEM);
1895 st->id = source_track->track_id;
1896 st->priv_data = source_track;
1898 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1899 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1901 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1902 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1903 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1904 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1906 source_track->original_duration = st->duration = component->duration;
1908 if (st->duration == -1)
1909 st->duration = AV_NOPTS_VALUE;
1910 st->start_time = component->start_position;
1911 if (material_track->edit_rate.num <= 0 ||
1912 material_track->edit_rate.den <= 0) {
1913 av_log(mxf->fc, AV_LOG_WARNING,
1914 "Invalid edit rate (%d/%d) found on stream #%d, "
1915 "defaulting to 25/1\n",
1916 material_track->edit_rate.num,
1917 material_track->edit_rate.den, st->index);
1918 material_track->edit_rate = (AVRational){25, 1};
1920 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1922 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1923 * the former is accessible via st->priv_data */
1924 source_track->edit_rate = material_track->edit_rate;
1926 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1927 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1928 st->codec->codec_type = codec_ul->id;
1931 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1934 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1935 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1936 essence_container_ul = &descriptor->essence_container_ul;
1937 /* HACK: replacing the original key with mxf_encrypted_essence_container
1938 * is not allowed according to s429-6, try to find correct information anyway */
1939 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1940 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1941 for (k = 0; k < mxf->metadata_sets_count; k++) {
1942 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1943 if (metadata->type == CryptoContext) {
1944 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1950 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1951 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1952 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1953 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1954 avcodec_get_name(st->codec->codec_id));
1955 for (k = 0; k < 16; k++) {
1956 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1957 descriptor->essence_codec_ul[k]);
1958 if (!(k+1 & 19) || k == 5)
1959 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1961 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1963 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
1964 if (source_package->name && source_package->name[0])
1965 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1967 mxf_parse_physical_source_package(mxf, source_track, st);
1969 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1970 source_track->intra_only = mxf_is_intra_only(descriptor);
1971 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1972 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1973 st->codec->codec_id = container_ul->id;
1974 st->codec->width = descriptor->width;
1975 st->codec->height = descriptor->height; /* Field height, not frame height */
1976 switch (descriptor->frame_layout) {
1977 case SegmentedFrame:
1978 /* This one is a weird layout I don't fully understand. */
1979 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1982 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1985 /* Every other line is stored and needs to be duplicated. */
1986 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1987 break; /* The correct thing to do here is fall through, but by breaking we might be
1988 able to decode some streams at half the vertical resolution, rather than not al all.
1989 It's also for compatibility with the old behavior. */
1992 case SeparateFields:
1993 switch (descriptor->field_dominance) {
1995 st->codec->field_order = AV_FIELD_TT;
1998 st->codec->field_order = AV_FIELD_BB;
2001 avpriv_request_sample(mxf->fc,
2002 "Field dominance %d support",
2003 descriptor->field_dominance);
2004 case 0: // we already have many samples with field_dominance == unknown
2007 /* Turn field height into frame height. */
2008 st->codec->height *= 2;
2011 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2013 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2014 st->codec->pix_fmt = descriptor->pix_fmt;
2015 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2016 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2017 &descriptor->essence_codec_ul);
2018 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2019 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2020 /* support files created before RP224v10 by defaulting to UYVY422
2021 if subsampling is 4:2:2 and component depth is 8-bit */
2022 if (descriptor->horiz_subsampling == 2 &&
2023 descriptor->vert_subsampling == 1 &&
2024 descriptor->component_depth == 8) {
2025 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
2030 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2031 if (material_track->sequence->origin) {
2032 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2034 if (source_track->sequence->origin) {
2035 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2037 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2038 st->display_aspect_ratio = descriptor->aspect_ratio;
2039 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2040 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2041 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2042 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))
2043 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2044 st->codec->channels = descriptor->channels;
2045 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2047 if (descriptor->sample_rate.den > 0) {
2048 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2049 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2051 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2052 "found for stream #%d, time base forced to 1/48000\n",
2053 descriptor->sample_rate.num, descriptor->sample_rate.den,
2055 avpriv_set_pts_info(st, 64, 1, 48000);
2058 /* if duration is set, rescale it from EditRate to SampleRate */
2059 if (st->duration != AV_NOPTS_VALUE)
2060 st->duration = av_rescale_q(st->duration,
2061 av_inv_q(material_track->edit_rate),
2064 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2065 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2066 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2067 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2068 else if (descriptor->bits_per_sample == 32)
2069 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2070 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2071 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2072 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2073 else if (descriptor->bits_per_sample == 32)
2074 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2075 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2076 st->need_parsing = AVSTREAM_PARSE_FULL;
2078 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2079 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2080 essence_container_ul)->id;
2081 if (codec_id >= 0 &&
2082 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2083 av_dict_set(&st->metadata, "data_type",
2084 mxf_data_essence_descriptor[codec_id], 0);
2087 if (descriptor->extradata) {
2088 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2089 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2091 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2092 ret = ff_generate_avci_extradata(st);
2096 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2097 /* TODO: decode timestamps */
2098 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2107 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2109 struct tm time = { 0 };
2110 time.tm_year = (timestamp >> 48) - 1900;
2111 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2112 time.tm_mday = (timestamp >> 32 & 0xFF);
2113 time.tm_hour = (timestamp >> 24 & 0xFF);
2114 time.tm_min = (timestamp >> 16 & 0xFF);
2115 time.tm_sec = (timestamp >> 8 & 0xFF);
2117 /* msvcrt versions of strftime calls the invalid parameter handler
2118 * (aborting the process if one isn't set) if the parameters are out
2120 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2121 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2122 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2123 time.tm_min = av_clip(time.tm_min, 0, 59);
2124 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2126 *str = av_mallocz(32);
2128 return AVERROR(ENOMEM);
2129 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2135 #define SET_STR_METADATA(pb, name, str) do { \
2136 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2138 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2141 #define SET_UID_METADATA(pb, name, var, str) do { \
2142 avio_read(pb, var, 16); \
2143 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2145 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2148 #define SET_TS_METADATA(pb, name, var, str) do { \
2149 var = avio_rb64(pb); \
2150 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2152 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2155 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2157 MXFContext *mxf = arg;
2158 AVFormatContext *s = mxf->fc;
2165 SET_STR_METADATA(pb, "company_name", str);
2168 SET_STR_METADATA(pb, "product_name", str);
2171 SET_STR_METADATA(pb, "product_version", str);
2174 SET_UID_METADATA(pb, "product_uid", uid, str);
2177 SET_TS_METADATA(pb, "modification_date", ts, str);
2180 SET_STR_METADATA(pb, "application_platform", str);
2183 SET_UID_METADATA(pb, "generation_uid", uid, str);
2186 SET_UID_METADATA(pb, "uid", uid, str);
2192 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2194 MXFContext *mxf = arg;
2195 AVFormatContext *s = mxf->fc;
2199 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2200 SET_STR_METADATA(pb, "project_name", str);
2205 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2206 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2207 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2208 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2209 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2210 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2211 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2212 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2213 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2214 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2215 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2216 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2217 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2218 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2219 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2220 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2221 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2222 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2223 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2224 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2225 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2226 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2227 { { 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 */
2228 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2229 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2230 { { 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 */
2231 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2232 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2233 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2234 { { 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 */
2235 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2236 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2237 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2238 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2239 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2240 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2241 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2242 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2245 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2248 case MultipleDescriptor:
2250 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2251 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2259 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2261 AVIOContext *pb = mxf->fc->pb;
2262 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2263 uint64_t klv_end = avio_tell(pb) + klv->length;
2266 return AVERROR(ENOMEM);
2267 mxf_metadataset_init(ctx, type);
2268 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2270 int tag = avio_rb16(pb);
2271 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2272 uint64_t next = avio_tell(pb) + size;
2275 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2276 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2277 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2280 if (tag > 0x7FFF) { /* dynamic tag */
2282 for (i = 0; i < mxf->local_tags_count; i++) {
2283 int local_tag = AV_RB16(mxf->local_tags+i*18);
2284 if (local_tag == tag) {
2285 memcpy(uid, mxf->local_tags+i*18+2, 16);
2286 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2287 PRINT_KEY(mxf->fc, "uid", uid);
2291 if (ctx_size && tag == 0x3C0A) {
2292 avio_read(pb, ctx->uid, 16);
2293 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2294 mxf_free_metadataset(&ctx, !!ctx_size);
2298 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2299 * it extending past the end of the KLV though (zzuf5.mxf). */
2300 if (avio_tell(pb) > klv_end) {
2303 mxf_free_metadataset(&ctx, !!ctx_size);
2306 av_log(mxf->fc, AV_LOG_ERROR,
2307 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2309 return AVERROR_INVALIDDATA;
2310 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2311 avio_seek(pb, next, SEEK_SET);
2313 if (ctx_size) ctx->type = type;
2314 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2318 * Matches any partition pack key, in other words:
2322 * @return non-zero if the key is a partition pack key, zero otherwise
2324 static int mxf_is_partition_pack_key(UID key)
2326 //NOTE: this is a little lax since it doesn't constraint key[14]
2327 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2328 key[13] >= 2 && key[13] <= 4;
2332 * Parses a metadata KLV
2333 * @return <0 on error, 0 otherwise
2335 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2336 int ctx_size, enum MXFMetadataSetType type)
2338 AVFormatContext *s = mxf->fc;
2340 if (klv.key[5] == 0x53) {
2341 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2343 uint64_t next = avio_tell(s->pb) + klv.length;
2344 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2346 /* only seek forward, else this can loop for a long time */
2347 if (avio_tell(s->pb) > next) {
2348 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2350 return AVERROR_INVALIDDATA;
2353 avio_seek(s->pb, next, SEEK_SET);
2356 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2363 * Seeks to the previous partition and parses it, if possible
2364 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2366 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2368 AVIOContext *pb = mxf->fc->pb;
2370 int64_t current_partition_ofs;
2373 if (!mxf->current_partition ||
2374 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2375 return 0; /* we've parsed all partitions */
2377 /* seek to previous partition */
2378 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2379 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2380 mxf->current_partition = NULL;
2382 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2384 /* Make sure this is actually a PartitionPack, and if so parse it.
2387 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2388 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2392 if (!mxf_is_partition_pack_key(klv.key)) {
2393 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2394 return AVERROR_INVALIDDATA;
2397 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2398 * can point to just before the current partition, causing klv_read_packet()
2399 * to sync back up to it. See deadlock3.mxf
2401 if (klv.offset >= current_partition_ofs) {
2402 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2403 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2404 return AVERROR_INVALIDDATA;
2407 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2414 * Called when essence is encountered
2415 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2417 static int mxf_parse_handle_essence(MXFContext *mxf)
2419 AVIOContext *pb = mxf->fc->pb;
2422 if (mxf->parsing_backward) {
2423 return mxf_seek_to_previous_partition(mxf);
2425 if (!mxf->footer_partition) {
2426 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2430 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2432 /* remember where we were so we don't end up seeking further back than this */
2433 mxf->last_forward_tell = avio_tell(pb);
2435 if (!pb->seekable) {
2436 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2440 /* seek to FooterPartition and parse backward */
2441 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2442 av_log(mxf->fc, AV_LOG_ERROR,
2443 "failed to seek to FooterPartition @ 0x%" PRIx64
2444 " (%"PRId64") - partial file?\n",
2445 mxf->run_in + mxf->footer_partition, ret);
2449 mxf->current_partition = NULL;
2450 mxf->parsing_backward = 1;
2457 * Called when the next partition or EOF is encountered
2458 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2460 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2462 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2466 * Figures out the proper offset and length of the essence container in each partition
2468 static void mxf_compute_essence_containers(MXFContext *mxf)
2472 /* everything is already correct */
2473 if (mxf->op == OPAtom)
2476 for (x = 0; x < mxf->partitions_count; x++) {
2477 MXFPartition *p = &mxf->partitions[x];
2480 continue; /* BodySID == 0 -> no essence */
2482 if (x >= mxf->partitions_count - 1)
2483 break; /* FooterPartition - can't compute length (and we don't need to) */
2485 /* essence container spans to the next partition */
2486 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2488 if (p->essence_length < 0) {
2489 /* next ThisPartition < essence_offset */
2490 p->essence_length = 0;
2491 av_log(mxf->fc, AV_LOG_ERROR,
2492 "partition %i: bad ThisPartition = %"PRIX64"\n",
2493 x+1, mxf->partitions[x+1].this_partition);
2498 static int64_t round_to_kag(int64_t position, int kag_size)
2500 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2501 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2502 int64_t ret = (position / kag_size) * kag_size;
2503 return ret == position ? ret : ret + kag_size;
2506 static int is_pcm(enum AVCodecID codec_id)
2508 /* we only care about "normal" PCM codecs until we get samples */
2509 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2513 * Deal with the case where for some audio atoms EditUnitByteCount is
2514 * very small (2, 4..). In those cases we should read more than one
2515 * sample per call to mxf_read_packet().
2517 static void mxf_handle_small_eubc(AVFormatContext *s)
2519 MXFContext *mxf = s->priv_data;
2521 /* assuming non-OPAtom == frame wrapped
2522 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2523 if (mxf->op != OPAtom)
2526 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2527 if (s->nb_streams != 1 ||
2528 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2529 !is_pcm(s->streams[0]->codec->codec_id) ||
2530 mxf->nb_index_tables != 1 ||
2531 mxf->index_tables[0].nb_segments != 1 ||
2532 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2535 /* arbitrarily default to 48 kHz PAL audio frame size */
2536 /* TODO: We could compute this from the ratio between the audio
2537 * and video edit rates for 48 kHz NTSC we could use the
2538 * 1802-1802-1802-1802-1801 pattern. */
2539 mxf->edit_units_per_packet = 1920;
2543 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2545 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2547 AVFormatContext *s = mxf->fc;
2548 AVStream *st = NULL;
2549 MXFIndexTableSegment *segment = NULL;
2550 MXFPartition *p = NULL;
2551 int essence_partition_count = 0;
2554 if (mxf->op != OPAtom)
2557 /* TODO: support raw video without a index if they exist */
2558 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2561 /* check if file already has a IndexTableSegment */
2562 for (i = 0; i < mxf->metadata_sets_count; i++) {
2563 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2567 /* find the essence partition */
2568 for (i = 0; i < mxf->partitions_count; i++) {
2569 /* BodySID == 0 -> no essence */
2570 if (!mxf->partitions[i].body_sid)
2573 p = &mxf->partitions[i];
2574 essence_partition_count++;
2577 /* only handle files with a single essence partition */
2578 if (essence_partition_count != 1)
2581 if (!(segment = av_mallocz(sizeof(*segment))))
2582 return AVERROR(ENOMEM);
2584 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2585 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2590 segment->type = IndexTableSegment;
2591 /* stream will be treated as small EditUnitByteCount */
2592 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2593 segment->index_start_position = 0;
2594 segment->index_duration = s->streams[0]->duration;
2595 segment->index_sid = p->index_sid;
2596 segment->body_sid = p->body_sid;
2600 static void mxf_read_random_index_pack(AVFormatContext *s)
2602 MXFContext *mxf = s->priv_data;
2604 int64_t file_size, max_rip_length, min_rip_length;
2607 if (!s->pb->seekable)
2610 file_size = avio_size(s->pb);
2612 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2613 * The limit below assumes a file with nothing but partition packs and a RIP.
2614 * Before changing this, consider that a muxer may place each sample in its own partition.
2616 * 105 is the size of the smallest possible PartitionPack
2617 * 12 is the size of each RIP entry
2618 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2620 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2621 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2623 /* We're only interested in RIPs with at least two entries.. */
2624 min_rip_length = 16+1+24+4;
2626 /* See S377m section 11 */
2627 avio_seek(s->pb, file_size - 4, SEEK_SET);
2628 length = avio_rb32(s->pb);
2630 if (length < min_rip_length || length > max_rip_length)
2632 avio_seek(s->pb, file_size - length, SEEK_SET);
2633 if (klv_read_packet(&klv, s->pb) < 0 ||
2634 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2635 klv.length != length - 20)
2638 avio_skip(s->pb, klv.length - 12);
2639 mxf->footer_partition = avio_rb64(s->pb);
2642 if (mxf->run_in + mxf->footer_partition >= file_size) {
2643 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2644 mxf->footer_partition = 0;
2648 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2651 static int mxf_read_header(AVFormatContext *s)
2653 MXFContext *mxf = s->priv_data;
2655 int64_t essence_offset = 0;
2658 mxf->last_forward_tell = INT64_MAX;
2659 mxf->edit_units_per_packet = 1;
2661 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2662 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2663 return AVERROR_INVALIDDATA;
2665 avio_seek(s->pb, -14, SEEK_CUR);
2667 mxf->run_in = avio_tell(s->pb);
2669 mxf_read_random_index_pack(s);
2671 while (!avio_feof(s->pb)) {
2672 const MXFMetadataReadTableEntry *metadata;
2674 if (klv_read_packet(&klv, s->pb) < 0) {
2675 /* EOF - seek to previous partition or stop */
2676 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2682 PRINT_KEY(s, "read header", klv.key);
2683 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2684 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2685 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2686 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2687 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2689 if (!mxf->current_partition) {
2690 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2691 return AVERROR_INVALIDDATA;
2694 if (!mxf->current_partition->essence_offset) {
2695 /* for OP1a we compute essence_offset
2696 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2697 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2698 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2700 int64_t op1a_essence_offset =
2701 round_to_kag(mxf->current_partition->this_partition +
2702 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2703 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2704 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2706 if (mxf->op == OPAtom) {
2707 /* point essence_offset to the actual data
2708 * OPAtom has all the essence in one big KLV
2710 mxf->current_partition->essence_offset = avio_tell(s->pb);
2711 mxf->current_partition->essence_length = klv.length;
2713 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2714 mxf->current_partition->essence_offset = op1a_essence_offset;
2718 if (!essence_offset)
2719 essence_offset = klv.offset;
2721 /* seek to footer, previous partition or stop */
2722 if (mxf_parse_handle_essence(mxf) <= 0)
2725 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2726 /* next partition pack - keep going, seek to previous partition or stop */
2727 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2729 else if (mxf->parsing_backward)
2731 /* we're still parsing forward. proceed to parsing this partition pack */
2734 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2735 if (IS_KLV_KEY(klv.key, metadata->key)) {
2736 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2740 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2744 if (!metadata->read)
2745 avio_skip(s->pb, klv.length);
2747 /* FIXME avoid seek */
2748 if (!essence_offset) {
2749 av_log(s, AV_LOG_ERROR, "no essence\n");
2750 ret = AVERROR_INVALIDDATA;
2753 avio_seek(s->pb, essence_offset, SEEK_SET);
2755 mxf_compute_essence_containers(mxf);
2757 /* we need to do this before computing the index tables
2758 * to be able to fill in zero IndexDurations with st->duration */
2759 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2762 mxf_handle_missing_index_segment(mxf);
2763 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2766 if (mxf->nb_index_tables > 1) {
2767 /* TODO: look up which IndexSID to use via EssenceContainerData */
2768 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2769 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2770 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2771 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2772 ret = AVERROR_INVALIDDATA;
2776 mxf_handle_small_eubc(s);
2786 * Sets mxf->current_edit_unit based on what offset we're currently at.
2787 * @return next_ofs if OK, <0 on error
2789 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2791 int64_t last_ofs = -1, next_ofs = -1;
2792 MXFIndexTable *t = &mxf->index_tables[0];
2794 /* this is called from the OP1a demuxing logic, which means there
2795 * may be no index tables */
2796 if (mxf->nb_index_tables <= 0)
2799 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2800 while (mxf->current_edit_unit >= 0) {
2801 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2804 if (next_ofs <= last_ofs) {
2805 /* large next_ofs didn't change or current_edit_unit wrapped
2806 * around this fixes the infinite loop on zzuf3.mxf */
2807 av_log(mxf->fc, AV_LOG_ERROR,
2808 "next_ofs didn't change. not deriving packet timestamps\n");
2812 if (next_ofs > current_offset)
2815 last_ofs = next_ofs;
2816 mxf->current_edit_unit++;
2819 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2820 if (mxf->current_edit_unit < 0)
2826 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2827 uint64_t *sample_count)
2829 int i, total = 0, size = 0;
2830 AVStream *st = mxf->fc->streams[stream_index];
2831 MXFTrack *track = st->priv_data;
2832 AVRational time_base = av_inv_q(track->edit_rate);
2833 AVRational sample_rate = av_inv_q(st->time_base);
2834 const MXFSamplesPerFrame *spf = NULL;
2836 if ((sample_rate.num / sample_rate.den) == 48000)
2837 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2839 int remainder = (sample_rate.num * time_base.num) %
2840 (time_base.den * sample_rate.den);
2841 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2842 av_mul_q(sample_rate, time_base)));
2844 av_log(mxf->fc, AV_LOG_WARNING,
2845 "seeking detected on stream #%d with time base (%d/%d) and "
2846 "sample rate (%d/%d), audio pts won't be accurate.\n",
2847 stream_index, time_base.num, time_base.den,
2848 sample_rate.num, sample_rate.den);
2852 while (spf->samples_per_frame[size]) {
2853 total += spf->samples_per_frame[size];
2859 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2860 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2861 *sample_count += spf->samples_per_frame[i];
2867 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2870 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2871 int64_t bits_per_sample = codec->bits_per_coded_sample;
2873 if (!bits_per_sample)
2874 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2876 pkt->pts = track->sample_count;
2878 if ( codec->channels <= 0
2879 || bits_per_sample <= 0
2880 || codec->channels * (int64_t)bits_per_sample < 8)
2881 return AVERROR(EINVAL);
2882 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2886 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2889 MXFContext *mxf = s->priv_data;
2892 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2893 PRINT_KEY(s, "read packet", klv.key);
2894 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2895 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2896 ret = mxf_decrypt_triplet(s, pkt, &klv);
2898 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2903 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2904 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2905 int index = mxf_get_stream_index(s, &klv);
2906 int64_t next_ofs, next_klv;
2909 AVCodecContext *codec;
2912 av_log(s, AV_LOG_ERROR,
2913 "error getting stream index %"PRIu32"\n",
2914 AV_RB32(klv.key + 12));
2918 st = s->streams[index];
2919 track = st->priv_data;
2921 if (s->streams[index]->discard == AVDISCARD_ALL)
2924 next_klv = avio_tell(s->pb) + klv.length;
2925 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2927 if (next_ofs >= 0 && next_klv > next_ofs) {
2928 /* if this check is hit then it's possible OPAtom was treated as OP1a
2929 * truncate the packet since it's probably very large (>2 GiB is common) */
2930 avpriv_request_sample(s,
2931 "OPAtom misinterpreted as OP1a?"
2932 "KLV for edit unit %i extending into "
2934 mxf->current_edit_unit);
2935 klv.length = next_ofs - avio_tell(s->pb);
2938 /* check for 8 channels AES3 element */
2939 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2940 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2943 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2947 ret = av_get_packet(s->pb, pkt, klv.length);
2951 pkt->stream_index = index;
2952 pkt->pos = klv.offset;
2956 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2957 /* mxf->current_edit_unit good - see if we have an
2958 * index table to derive timestamps from */
2959 MXFIndexTable *t = &mxf->index_tables[0];
2961 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2962 pkt->dts = mxf->current_edit_unit + t->first_dts;
2963 pkt->pts = t->ptses[mxf->current_edit_unit];
2964 } else if (track->intra_only) {
2965 /* intra-only -> PTS = EditUnit.
2966 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2967 pkt->pts = mxf->current_edit_unit;
2969 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2970 ret = mxf_set_audio_pts(mxf, codec, pkt);
2975 /* seek for truncated packets */
2976 avio_seek(s->pb, next_klv, SEEK_SET);
2981 avio_skip(s->pb, klv.length);
2983 return avio_feof(s->pb) ? AVERROR_EOF : ret;
2986 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2988 MXFContext *mxf = s->priv_data;
2990 int64_t ret64, pos, next_pos;
2995 if (mxf->op != OPAtom)
2996 return mxf_read_packet_old(s, pkt);
2998 /* OPAtom - clip wrapped demuxing */
2999 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3001 t = &mxf->index_tables[0];
3003 if (mxf->current_edit_unit >= st->duration)
3006 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3008 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3011 /* compute size by finding the next edit unit or the end of the essence container
3012 * not pretty, but it works */
3013 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3014 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3015 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3016 return AVERROR_INVALIDDATA;
3019 if ((size = next_pos - pos) <= 0) {
3020 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3021 return AVERROR_INVALIDDATA;
3024 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3027 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3030 pkt->stream_index = 0;
3032 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3033 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3034 pkt->dts = mxf->current_edit_unit + t->first_dts;
3035 pkt->pts = t->ptses[mxf->current_edit_unit];
3036 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3037 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3042 mxf->current_edit_unit += edit_units;
3047 static int mxf_read_close(AVFormatContext *s)
3049 MXFContext *mxf = s->priv_data;
3052 av_freep(&mxf->packages_refs);
3054 for (i = 0; i < s->nb_streams; i++)
3055 s->streams[i]->priv_data = NULL;
3057 for (i = 0; i < mxf->metadata_sets_count; i++) {
3058 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3060 av_freep(&mxf->partitions);
3061 av_freep(&mxf->metadata_sets);
3062 av_freep(&mxf->aesc);
3063 av_freep(&mxf->local_tags);
3065 if (mxf->index_tables) {
3066 for (i = 0; i < mxf->nb_index_tables; i++) {
3067 av_freep(&mxf->index_tables[i].segments);
3068 av_freep(&mxf->index_tables[i].ptses);
3069 av_freep(&mxf->index_tables[i].fake_index);
3072 av_freep(&mxf->index_tables);
3077 static int mxf_probe(AVProbeData *p) {
3078 const uint8_t *bufp = p->buf;
3079 const uint8_t *end = p->buf + p->buf_size;
3081 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3084 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3085 end -= sizeof(mxf_header_partition_pack_key);
3087 for (; bufp < end;) {
3088 if (!((bufp[13] - 1) & 0xF2)){
3089 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3090 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3091 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3092 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3093 return AVPROBE_SCORE_MAX;
3102 /* rudimentary byte seek */
3103 /* XXX: use MXF Index */
3104 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3106 AVStream *st = s->streams[stream_index];
3108 MXFContext* mxf = s->priv_data;
3112 MXFTrack *source_track = st->priv_data;
3114 /* if audio then truncate sample_time to EditRate */
3115 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3116 sample_time = av_rescale_q(sample_time, st->time_base,
3117 av_inv_q(source_track->edit_rate));
3119 if (mxf->nb_index_tables <= 0) {
3121 return AVERROR_INVALIDDATA;
3122 if (sample_time < 0)
3124 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3126 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3130 ff_update_cur_dts(s, st, sample_time);
3131 mxf->current_edit_unit = sample_time;
3133 t = &mxf->index_tables[0];
3135 /* clamp above zero, else ff_index_search_timestamp() returns negative
3136 * this also means we allow seeking before the start */
3137 sample_time = FFMAX(sample_time, 0);
3139 if (t->fake_index) {
3140 /* behave as if we have a proper index */
3141 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3144 /* no IndexEntryArray (one or more CBR segments)
3145 * make sure we don't seek past the end */
3146 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3149 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3152 ff_update_cur_dts(s, st, sample_time);
3153 mxf->current_edit_unit = sample_time;
3154 avio_seek(s->pb, seekpos, SEEK_SET);
3157 // Update all tracks sample count
3158 for (i = 0; i < s->nb_streams; i++) {
3159 AVStream *cur_st = s->streams[i];
3160 MXFTrack *cur_track = cur_st->priv_data;
3161 uint64_t current_sample_count = 0;
3162 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3163 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3167 cur_track->sample_count = current_sample_count;
3173 AVInputFormat ff_mxf_demuxer = {
3175 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3176 .priv_data_size = sizeof(MXFContext),
3177 .read_probe = mxf_probe,
3178 .read_header = mxf_read_header,
3179 .read_packet = mxf_read_packet,
3180 .read_close = mxf_read_close,
3181 .read_seek = mxf_read_seek,