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;
170 AVRational sample_rate;
171 AVRational aspect_ratio;
173 int height; /* Field height, not frame height */
174 int frame_layout; /* See MXFFrameLayout enum */
180 int64_t duration; /* ContainerDuration optional property */
181 unsigned int component_depth;
182 unsigned int horiz_subsampling;
183 unsigned int vert_subsampling;
184 UID *sub_descriptors_refs;
185 int sub_descriptors_count;
189 enum AVPixelFormat pix_fmt;
192 typedef struct MXFIndexTableSegment {
194 enum MXFMetadataSetType type;
195 int edit_unit_byte_count;
198 AVRational index_edit_rate;
199 uint64_t index_start_position;
200 uint64_t index_duration;
201 int8_t *temporal_offset_entries;
203 uint64_t *stream_offset_entries;
204 int nb_index_entries;
205 } MXFIndexTableSegment;
207 typedef struct MXFPackage {
209 enum MXFMetadataSetType type;
214 MXFDescriptor *descriptor; /* only one */
221 typedef struct MXFMetadataSet {
223 enum MXFMetadataSetType type;
226 /* decoded index table */
227 typedef struct MXFIndexTable {
230 int nb_ptses; /* number of PTSes or total duration of index */
231 int64_t first_dts; /* DTS = EditUnit + first_dts */
232 int64_t *ptses; /* maps EditUnit -> PTS */
234 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
235 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
236 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
239 typedef struct MXFContext {
240 MXFPartition *partitions;
241 unsigned partitions_count;
245 MXFMetadataSet **metadata_sets;
246 int metadata_sets_count;
250 int local_tags_count;
251 uint64_t footer_partition;
252 KLVPacket current_klv_data;
253 int current_klv_index;
255 MXFPartition *current_partition;
256 int parsing_backward;
257 int64_t last_forward_tell;
258 int last_forward_partition;
259 int current_edit_unit;
261 MXFIndexTable *index_tables;
262 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
265 enum MXFWrappingScheme {
270 /* NOTE: klv_offset is not set (-1) for local keys */
271 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
273 typedef struct MXFMetadataReadTableEntry {
275 MXFMetadataReadFunc *read;
277 enum MXFMetadataSetType type;
278 } MXFMetadataReadTableEntry;
280 static int mxf_read_close(AVFormatContext *s);
282 /* partial keys to match */
283 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
284 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
285 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
286 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
287 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
288 /* complete keys to match */
289 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 };
290 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
291 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
292 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 };
293 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
294 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
295 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
296 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 };
297 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 };
299 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
301 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
303 MXFIndexTableSegment *seg;
304 switch ((*ctx)->type) {
306 av_freep(&((MXFDescriptor *)*ctx)->extradata);
308 case MultipleDescriptor:
309 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
312 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
315 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
318 case MaterialPackage:
319 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
320 av_freep(&((MXFPackage *)*ctx)->name);
321 av_freep(&((MXFPackage *)*ctx)->comment_refs);
324 av_freep(&((MXFTaggedValue *)*ctx)->name);
325 av_freep(&((MXFTaggedValue *)*ctx)->value);
327 case IndexTableSegment:
328 seg = (MXFIndexTableSegment *)*ctx;
329 av_freep(&seg->temporal_offset_entries);
330 av_freep(&seg->flag_entries);
331 av_freep(&seg->stream_offset_entries);
339 static int64_t klv_decode_ber_length(AVIOContext *pb)
341 uint64_t size = avio_r8(pb);
342 if (size & 0x80) { /* long form */
343 int bytes_num = size & 0x7f;
344 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
346 return AVERROR_INVALIDDATA;
349 size = size << 8 | avio_r8(pb);
354 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
357 for (i = 0; i < size && !avio_feof(pb); i++) {
361 else if (b != key[i])
367 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
369 if (!mxf_read_sync(pb, mxf_klv_key, 4))
370 return AVERROR_INVALIDDATA;
371 klv->offset = avio_tell(pb) - 4;
372 memcpy(klv->key, mxf_klv_key, 4);
373 avio_read(pb, klv->key + 4, 12);
374 klv->length = klv_decode_ber_length(pb);
375 return klv->length == -1 ? -1 : 0;
378 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
382 for (i = 0; i < s->nb_streams; i++) {
383 MXFTrack *track = s->streams[i]->priv_data;
385 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
388 /* return 0 if only one stream, for OP Atom files with 0 as track number */
389 return s->nb_streams == 1 ? 0 : -1;
392 /* XXX: use AVBitStreamFilter */
393 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
395 const uint8_t *buf_ptr, *end_ptr;
399 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
400 return AVERROR_INVALIDDATA;
401 length = av_get_packet(pb, pkt, length);
404 data_ptr = pkt->data;
405 end_ptr = pkt->data + length;
406 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
407 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
408 for (i = 0; i < st->codec->channels; i++) {
409 uint32_t sample = bytestream_get_le32(&buf_ptr);
410 if (st->codec->bits_per_coded_sample == 24)
411 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
413 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
415 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
417 av_shrink_packet(pkt, data_ptr - pkt->data);
421 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
423 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
424 MXFContext *mxf = s->priv_data;
425 AVIOContext *pb = s->pb;
426 int64_t end = avio_tell(pb) + klv->length;
429 uint64_t plaintext_size;
434 if (!mxf->aesc && s->key && s->keylen == 16) {
435 mxf->aesc = av_aes_alloc();
437 return AVERROR(ENOMEM);
438 av_aes_init(mxf->aesc, s->key, 128, 1);
441 avio_skip(pb, klv_decode_ber_length(pb));
443 klv_decode_ber_length(pb);
444 plaintext_size = avio_rb64(pb);
446 klv_decode_ber_length(pb);
447 avio_read(pb, klv->key, 16);
448 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
449 return AVERROR_INVALIDDATA;
450 index = mxf_get_stream_index(s, klv);
452 return AVERROR_INVALIDDATA;
454 klv_decode_ber_length(pb);
455 orig_size = avio_rb64(pb);
456 if (orig_size < plaintext_size)
457 return AVERROR_INVALIDDATA;
459 size = klv_decode_ber_length(pb);
460 if (size < 32 || size - 32 < orig_size)
461 return AVERROR_INVALIDDATA;
462 avio_read(pb, ivec, 16);
463 avio_read(pb, tmpbuf, 16);
465 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
466 if (memcmp(tmpbuf, checkv, 16))
467 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
469 size = av_get_packet(pb, pkt, size);
472 else if (size < plaintext_size)
473 return AVERROR_INVALIDDATA;
474 size -= plaintext_size;
476 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
477 &pkt->data[plaintext_size], size >> 4, ivec, 1);
478 av_shrink_packet(pkt, orig_size);
479 pkt->stream_index = index;
480 avio_skip(pb, end - avio_tell(pb));
484 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
486 MXFContext *mxf = arg;
487 int item_num = avio_rb32(pb);
488 int item_len = avio_rb32(pb);
490 if (item_len != 18) {
491 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
492 return AVERROR_PATCHWELCOME;
494 if (item_num > 65536) {
495 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
496 return AVERROR_INVALIDDATA;
499 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
500 av_free(mxf->local_tags);
501 mxf->local_tags_count = 0;
502 mxf->local_tags = av_calloc(item_num, item_len);
503 if (!mxf->local_tags)
504 return AVERROR(ENOMEM);
505 mxf->local_tags_count = item_num;
506 avio_read(pb, mxf->local_tags, item_num*item_len);
510 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
512 MXFContext *mxf = arg;
513 MXFPartition *partition, *tmp_part;
515 uint64_t footer_partition;
516 uint32_t nb_essence_containers;
518 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
520 return AVERROR(ENOMEM);
521 mxf->partitions = tmp_part;
523 if (mxf->parsing_backward) {
524 /* insert the new partition pack in the middle
525 * this makes the entries in mxf->partitions sorted by offset */
526 memmove(&mxf->partitions[mxf->last_forward_partition+1],
527 &mxf->partitions[mxf->last_forward_partition],
528 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
529 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
531 mxf->last_forward_partition++;
532 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
535 memset(partition, 0, sizeof(*partition));
536 mxf->partitions_count++;
537 partition->pack_length = avio_tell(pb) - klv_offset + size;
538 partition->pack_ofs = klv_offset;
542 partition->type = Header;
545 partition->type = BodyPartition;
548 partition->type = Footer;
551 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
552 return AVERROR_INVALIDDATA;
555 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
556 partition->closed = partition->type == Footer || !(uid[14] & 1);
557 partition->complete = uid[14] > 2;
559 partition->kag_size = avio_rb32(pb);
560 partition->this_partition = avio_rb64(pb);
561 partition->previous_partition = avio_rb64(pb);
562 footer_partition = avio_rb64(pb);
563 partition->header_byte_count = avio_rb64(pb);
564 partition->index_byte_count = avio_rb64(pb);
565 partition->index_sid = avio_rb32(pb);
567 partition->body_sid = avio_rb32(pb);
568 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
569 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
570 return AVERROR_INVALIDDATA;
572 nb_essence_containers = avio_rb32(pb);
574 if (partition->this_partition &&
575 partition->previous_partition == partition->this_partition) {
576 av_log(mxf->fc, AV_LOG_ERROR,
577 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
578 partition->previous_partition);
579 /* override with the actual previous partition offset */
580 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
582 mxf->partitions + mxf->last_forward_partition - 2;
583 partition->previous_partition = prev->this_partition;
585 /* if no previous body partition are found point to the header
587 if (partition->previous_partition == partition->this_partition)
588 partition->previous_partition = 0;
589 av_log(mxf->fc, AV_LOG_ERROR,
590 "Overriding PreviousPartition with %"PRIx64"\n",
591 partition->previous_partition);
594 /* some files don'thave FooterPartition set in every partition */
595 if (footer_partition) {
596 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
597 av_log(mxf->fc, AV_LOG_ERROR,
598 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
599 mxf->footer_partition, footer_partition);
601 mxf->footer_partition = footer_partition;
605 av_log(mxf->fc, AV_LOG_TRACE,
606 "PartitionPack: ThisPartition = 0x%"PRIX64
607 ", PreviousPartition = 0x%"PRIX64", "
608 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
609 partition->this_partition,
610 partition->previous_partition, footer_partition,
611 partition->index_sid, partition->body_sid);
613 /* sanity check PreviousPartition if set */
614 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
615 if (partition->previous_partition &&
616 mxf->run_in + partition->previous_partition >= klv_offset) {
617 av_log(mxf->fc, AV_LOG_ERROR,
618 "PreviousPartition points to this partition or forward\n");
619 return AVERROR_INVALIDDATA;
622 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
623 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
624 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
625 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
626 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
627 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
628 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
629 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
630 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
631 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
632 else if (op[12] == 0x10) {
633 /* SMPTE 390m: "There shall be exactly one essence container"
634 * The following block deals with files that violate this, namely:
635 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
636 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
637 if (nb_essence_containers != 1) {
638 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
642 av_log(mxf->fc, AV_LOG_WARNING,
643 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
644 nb_essence_containers,
645 op == OP1a ? "OP1a" : "OPAtom");
651 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
655 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
656 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
657 partition->kag_size);
659 if (mxf->op == OPSONYOpt)
660 partition->kag_size = 512;
662 partition->kag_size = 1;
664 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
670 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
672 MXFMetadataSet **tmp;
674 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
676 return AVERROR(ENOMEM);
677 mxf->metadata_sets = tmp;
678 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
679 mxf->metadata_sets_count++;
683 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
685 MXFCryptoContext *cryptocontext = arg;
687 return AVERROR_INVALIDDATA;
688 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
689 avio_read(pb, cryptocontext->source_container_ul, 16);
693 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
695 *count = avio_rb32(pb);
696 *refs = av_calloc(*count, sizeof(UID));
699 return AVERROR(ENOMEM);
701 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
702 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
706 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
708 MXFContext *mxf = arg;
711 if (mxf->packages_refs)
712 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
713 av_free(mxf->packages_refs);
714 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
719 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
721 MXFStructuralComponent *source_clip = arg;
724 source_clip->duration = avio_rb64(pb);
727 source_clip->start_position = avio_rb64(pb);
730 /* UMID, only get last 16 bytes */
732 avio_read(pb, source_clip->source_package_uid, 16);
735 source_clip->source_track_id = avio_rb32(pb);
741 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
743 MXFTimecodeComponent *mxf_timecode = arg;
746 mxf_timecode->start_frame = avio_rb64(pb);
749 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
752 mxf_timecode->drop_frame = avio_r8(pb);
758 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
760 MXFPulldownComponent *mxf_pulldown = arg;
763 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
769 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
771 MXFTrack *track = arg;
774 track->track_id = avio_rb32(pb);
777 avio_read(pb, track->track_number, 4);
780 track->edit_rate.num = avio_rb32(pb);
781 track->edit_rate.den = avio_rb32(pb);
784 avio_read(pb, track->sequence_ref, 16);
790 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
792 MXFSequence *sequence = arg;
795 sequence->duration = avio_rb64(pb);
798 avio_read(pb, sequence->data_definition_ul, 16);
801 sequence->origin = avio_r8(pb);
804 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
805 &sequence->structural_components_count);
810 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
812 MXFEssenceGroup *essence_group = arg;
815 essence_group->duration = avio_rb64(pb);
818 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
819 &essence_group->structural_components_count);
824 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
830 return AVERROR(EINVAL);
832 buf_size = size + size / 2 + 1;
833 *str = av_malloc(buf_size);
835 return AVERROR(ENOMEM);
838 ret = avio_get_str16be(pb, size, *str, buf_size);
840 ret = avio_get_str16le(pb, size, *str, buf_size);
850 #define READ_STR16(type, big_endian) \
851 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
853 return mxf_read_utf16_string(pb, size, str, big_endian); \
859 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
861 MXFPackage *package = arg;
864 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
865 &package->tracks_count);
868 avio_read(pb, package->package_ul, 16);
869 avio_read(pb, package->package_uid, 16);
872 avio_read(pb, package->descriptor_ref, 16);
875 return mxf_read_utf16be_string(pb, size, &package->name);
877 return mxf_read_strong_ref_array(pb, &package->comment_refs,
878 &package->comment_count);
883 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
887 segment->nb_index_entries = avio_rb32(pb);
889 length = avio_rb32(pb);
891 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
892 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
893 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
894 av_freep(&segment->temporal_offset_entries);
895 av_freep(&segment->flag_entries);
896 return AVERROR(ENOMEM);
899 for (i = 0; i < segment->nb_index_entries; i++) {
900 segment->temporal_offset_entries[i] = avio_r8(pb);
901 avio_r8(pb); /* KeyFrameOffset */
902 segment->flag_entries[i] = avio_r8(pb);
903 segment->stream_offset_entries[i] = avio_rb64(pb);
904 avio_skip(pb, length - 11);
909 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
911 MXFIndexTableSegment *segment = arg;
914 segment->edit_unit_byte_count = avio_rb32(pb);
915 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
918 segment->index_sid = avio_rb32(pb);
919 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
922 segment->body_sid = avio_rb32(pb);
923 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
926 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
927 return mxf_read_index_entry_array(pb, segment);
929 segment->index_edit_rate.num = avio_rb32(pb);
930 segment->index_edit_rate.den = avio_rb32(pb);
931 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
932 segment->index_edit_rate.den);
935 segment->index_start_position = avio_rb64(pb);
936 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
939 segment->index_duration = avio_rb64(pb);
940 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
946 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
948 int code, value, ofs = 0;
949 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
954 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
957 layout[ofs++] = code;
958 layout[ofs++] = value;
960 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
961 } while (code != 0); /* SMPTE 377M E.2.46 */
963 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
966 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
968 MXFDescriptor *descriptor = arg;
971 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
972 &descriptor->sub_descriptors_count);
973 case 0x3002: /* ContainerDuration */
974 descriptor->duration = avio_rb64(pb);
977 avio_read(pb, descriptor->essence_container_ul, 16);
980 avio_read(pb, descriptor->codec_ul, 16);
983 descriptor->linked_track_id = avio_rb32(pb);
985 case 0x3201: /* PictureEssenceCoding */
986 avio_read(pb, descriptor->essence_codec_ul, 16);
989 descriptor->width = avio_rb32(pb);
992 descriptor->height = avio_rb32(pb);
995 descriptor->frame_layout = avio_r8(pb);
998 descriptor->aspect_ratio.num = avio_rb32(pb);
999 descriptor->aspect_ratio.den = avio_rb32(pb);
1002 descriptor->field_dominance = avio_r8(pb);
1005 descriptor->component_depth = avio_rb32(pb);
1008 descriptor->horiz_subsampling = avio_rb32(pb);
1011 descriptor->vert_subsampling = avio_rb32(pb);
1014 descriptor->sample_rate.num = avio_rb32(pb);
1015 descriptor->sample_rate.den = avio_rb32(pb);
1017 case 0x3D06: /* SoundEssenceCompression */
1018 avio_read(pb, descriptor->essence_codec_ul, 16);
1021 descriptor->channels = avio_rb32(pb);
1024 descriptor->bits_per_sample = avio_rb32(pb);
1027 mxf_read_pixel_layout(pb, descriptor);
1030 /* Private uid used by SONY C0023S01.mxf */
1031 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1032 if (descriptor->extradata)
1033 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1034 av_free(descriptor->extradata);
1035 descriptor->extradata_size = 0;
1036 descriptor->extradata = av_malloc(size);
1037 if (!descriptor->extradata)
1038 return AVERROR(ENOMEM);
1039 descriptor->extradata_size = size;
1040 avio_read(pb, descriptor->extradata, size);
1042 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1043 uint32_t rsiz = avio_rb16(pb);
1044 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1045 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1046 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1053 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1055 MXFTaggedValue *tagged_value = arg;
1061 avio_read(pb, key, 17);
1062 /* TODO: handle other types of of indirect values */
1063 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1064 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1065 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1066 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1071 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1073 MXFTaggedValue *tagged_value = arg;
1076 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1078 return mxf_read_indirect_value(tagged_value, pb, size);
1084 * Match an uid independently of the version byte and up to len common bytes
1087 static int mxf_match_uid(const UID key, const UID uid, int len)
1090 for (i = 0; i < len; i++) {
1091 if (i != 7 && key[i] != uid[i])
1097 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1099 while (uls->uid[0]) {
1100 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1107 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1113 for (i = 0; i < mxf->metadata_sets_count; i++) {
1114 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1115 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1116 return mxf->metadata_sets[i];
1122 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1123 // video essence container uls
1124 { { 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 */
1125 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1126 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1127 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1128 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1131 /* EC ULs for intra-only formats */
1132 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1133 { { 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 */
1134 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1137 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1138 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1139 { { 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 */
1140 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1141 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1144 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1145 // sound essence container uls
1146 { { 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 */
1147 { { 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 */
1148 { { 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 */
1149 { { 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 */
1150 { { 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) */
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 MXFCodecUL mxf_data_essence_container_uls[] = {
1155 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1156 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1159 static const MXFCodecUL mxf_codec_uls[] = {
1160 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1161 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1164 static const char* const mxf_data_essence_descriptor[] = {
1165 "vbi_vanc_smpte_436M",
1168 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1170 int i, j, nb_segments = 0;
1171 MXFIndexTableSegment **unsorted_segments;
1172 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1174 /* count number of segments, allocate arrays and copy unsorted segments */
1175 for (i = 0; i < mxf->metadata_sets_count; i++)
1176 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1180 return AVERROR_INVALIDDATA;
1182 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1183 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1184 av_freep(sorted_segments);
1185 av_free(unsorted_segments);
1186 return AVERROR(ENOMEM);
1189 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1190 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1191 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1193 *nb_sorted_segments = 0;
1195 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1196 for (i = 0; i < nb_segments; i++) {
1197 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1198 uint64_t best_index_duration = 0;
1200 for (j = 0; j < nb_segments; j++) {
1201 MXFIndexTableSegment *s = unsorted_segments[j];
1203 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1204 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1205 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1207 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1208 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1209 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1211 best_body_sid = s->body_sid;
1212 best_index_sid = s->index_sid;
1213 best_index_start = s->index_start_position;
1214 best_index_duration = s->index_duration;
1218 /* no suitable entry found -> we're done */
1222 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1223 last_body_sid = best_body_sid;
1224 last_index_sid = best_index_sid;
1225 last_index_start = best_index_start;
1228 av_free(unsorted_segments);
1234 * Computes the absolute file offset of the given essence container offset
1236 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1239 int64_t offset_in = offset; /* for logging */
1241 for (x = 0; x < mxf->partitions_count; x++) {
1242 MXFPartition *p = &mxf->partitions[x];
1244 if (p->body_sid != body_sid)
1247 if (offset < p->essence_length || !p->essence_length) {
1248 *offset_out = p->essence_offset + offset;
1252 offset -= p->essence_length;
1255 av_log(mxf->fc, AV_LOG_ERROR,
1256 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1257 offset_in, body_sid);
1259 return AVERROR_INVALIDDATA;
1263 * Returns the end position of the essence container with given BodySID, or zero if unknown
1265 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1270 for (x = 0; x < mxf->partitions_count; x++) {
1271 MXFPartition *p = &mxf->partitions[x];
1273 if (p->body_sid != body_sid)
1276 if (!p->essence_length)
1279 ret = p->essence_offset + p->essence_length;
1285 /* EditUnit -> absolute offset */
1286 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)
1289 int64_t offset_temp = 0;
1291 for (i = 0; i < index_table->nb_segments; i++) {
1292 MXFIndexTableSegment *s = index_table->segments[i];
1294 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1296 if (edit_unit < s->index_start_position + s->index_duration) {
1297 int64_t index = edit_unit - s->index_start_position;
1299 if (s->edit_unit_byte_count)
1300 offset_temp += s->edit_unit_byte_count * index;
1301 else if (s->nb_index_entries) {
1302 if (s->nb_index_entries == 2 * s->index_duration + 1)
1303 index *= 2; /* Avid index */
1305 if (index < 0 || index >= s->nb_index_entries) {
1306 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1307 index_table->index_sid, s->index_start_position);
1308 return AVERROR_INVALIDDATA;
1311 offset_temp = s->stream_offset_entries[index];
1313 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1314 index_table->index_sid, s->index_start_position);
1315 return AVERROR_INVALIDDATA;
1319 *edit_unit_out = edit_unit;
1321 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1323 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1324 offset_temp += s->edit_unit_byte_count * s->index_duration;
1329 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);
1331 return AVERROR_INVALIDDATA;
1334 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1337 int8_t max_temporal_offset = -128;
1340 /* first compute how many entries we have */
1341 for (i = 0; i < index_table->nb_segments; i++) {
1342 MXFIndexTableSegment *s = index_table->segments[i];
1344 if (!s->nb_index_entries) {
1345 index_table->nb_ptses = 0;
1346 return 0; /* no TemporalOffsets */
1349 index_table->nb_ptses += s->index_duration;
1352 /* paranoid check */
1353 if (index_table->nb_ptses <= 0)
1356 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1357 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1358 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1359 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1360 av_freep(&index_table->ptses);
1361 av_freep(&index_table->fake_index);
1362 av_freep(&index_table->offsets);
1363 return AVERROR(ENOMEM);
1366 /* we may have a few bad TemporalOffsets
1367 * make sure the corresponding PTSes don't have the bogus value 0 */
1368 for (x = 0; x < index_table->nb_ptses; x++)
1369 index_table->ptses[x] = AV_NOPTS_VALUE;
1383 * We want to transform it into this:
1394 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1395 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1396 * The latter makes DTS <= PTS.
1398 for (i = x = 0; i < index_table->nb_segments; i++) {
1399 MXFIndexTableSegment *s = index_table->segments[i];
1400 int index_delta = 1;
1401 int n = s->nb_index_entries;
1403 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1404 index_delta = 2; /* Avid index */
1405 /* ignore the last entry - it's the size of the essence container */
1409 for (j = 0; j < n; j += index_delta, x++) {
1410 int offset = s->temporal_offset_entries[j] / index_delta;
1411 int index = x + offset;
1413 if (x >= index_table->nb_ptses) {
1414 av_log(mxf->fc, AV_LOG_ERROR,
1415 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1416 s->nb_index_entries, s->index_duration);
1420 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1422 if (index < 0 || index >= index_table->nb_ptses) {
1423 av_log(mxf->fc, AV_LOG_ERROR,
1424 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1429 index_table->offsets[x] = offset;
1430 index_table->ptses[index] = x;
1431 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1435 /* calculate the fake index table in display order */
1436 for (x = 0; x < index_table->nb_ptses; x++) {
1437 index_table->fake_index[x].timestamp = x;
1438 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1439 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1443 index_table->first_dts = -max_temporal_offset;
1449 * Sorts and collects index table segments into index tables.
1450 * Also computes PTSes if possible.
1452 static int mxf_compute_index_tables(MXFContext *mxf)
1454 int i, j, k, ret, nb_sorted_segments;
1455 MXFIndexTableSegment **sorted_segments = NULL;
1457 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1458 nb_sorted_segments <= 0) {
1459 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1463 /* sanity check and count unique BodySIDs/IndexSIDs */
1464 for (i = 0; i < nb_sorted_segments; i++) {
1465 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1466 mxf->nb_index_tables++;
1467 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1468 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1469 ret = AVERROR_INVALIDDATA;
1470 goto finish_decoding_index;
1474 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1475 sizeof(*mxf->index_tables));
1476 if (!mxf->index_tables) {
1477 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1478 ret = AVERROR(ENOMEM);
1479 goto finish_decoding_index;
1482 /* distribute sorted segments to index tables */
1483 for (i = j = 0; i < nb_sorted_segments; i++) {
1484 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1489 mxf->index_tables[j].nb_segments++;
1492 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1493 MXFIndexTable *t = &mxf->index_tables[j];
1495 t->segments = av_mallocz_array(t->nb_segments,
1496 sizeof(*t->segments));
1499 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1500 " pointer array\n");
1501 ret = AVERROR(ENOMEM);
1502 goto finish_decoding_index;
1505 if (sorted_segments[i]->index_start_position)
1506 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1507 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1509 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1510 t->index_sid = sorted_segments[i]->index_sid;
1511 t->body_sid = sorted_segments[i]->body_sid;
1513 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1514 goto finish_decoding_index;
1516 /* fix zero IndexDurations */
1517 for (k = 0; k < t->nb_segments; k++) {
1518 if (t->segments[k]->index_duration)
1521 if (t->nb_segments > 1)
1522 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1525 if (mxf->fc->nb_streams <= 0) {
1526 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1530 /* assume the first stream's duration is reasonable
1531 * leave index_duration = 0 on further segments in case we have any (unlikely)
1533 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1539 finish_decoding_index:
1540 av_free(sorted_segments);
1544 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1546 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1547 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1548 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1549 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1552 static int mxf_uid_to_str(UID uid, char **str)
1556 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1558 return AVERROR(ENOMEM);
1559 for (i = 0; i < sizeof(UID); i++) {
1560 snprintf(p, 2 + 1, "%.2x", uid[i]);
1562 if (i == 3 || i == 5 || i == 7 || i == 9) {
1563 snprintf(p, 1 + 1, "-");
1570 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1574 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1576 return AVERROR(ENOMEM);
1577 snprintf(p, 2 + 1, "0x");
1579 for (i = 0; i < sizeof(UID); i++) {
1580 snprintf(p, 2 + 1, "%.2X", ul[i]);
1584 for (i = 0; i < sizeof(UID); i++) {
1585 snprintf(p, 2 + 1, "%.2X", uid[i]);
1591 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1597 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1599 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1603 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1605 char buf[AV_TIMECODE_STR_SIZE];
1606 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1611 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1613 MXFStructuralComponent *component = NULL;
1614 MXFPulldownComponent *pulldown = NULL;
1616 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1620 switch (component->type) {
1621 case TimecodeComponent:
1622 return (MXFTimecodeComponent*)component;
1623 case PulldownComponent: /* timcode component may be located on a pulldown component */
1624 pulldown = (MXFPulldownComponent*)component;
1625 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1632 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1634 MXFPackage *package = NULL;
1637 for (i = 0; i < mxf->packages_count; i++) {
1638 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1642 if (!memcmp(package->package_uid, package_uid, 16))
1648 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1650 MXFDescriptor *sub_descriptor = NULL;
1656 if (descriptor->type == MultipleDescriptor) {
1657 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1658 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1660 if (!sub_descriptor) {
1661 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1664 if (sub_descriptor->linked_track_id == track_id) {
1665 return sub_descriptor;
1668 } else if (descriptor->type == Descriptor)
1674 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1676 MXFStructuralComponent *component = NULL;
1677 MXFPackage *package = NULL;
1678 MXFDescriptor *descriptor = NULL;
1681 if (!essence_group || !essence_group->structural_components_count)
1684 /* essence groups contains multiple representations of the same media,
1685 this return the first components with a valid Descriptor typically index 0 */
1686 for (i =0; i < essence_group->structural_components_count; i++){
1687 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1691 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1694 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1701 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1703 MXFStructuralComponent *component = NULL;
1705 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1708 switch (component->type) {
1712 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1719 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1721 MXFTaggedValue *tag;
1725 for (i = 0; i < package->comment_count; i++) {
1726 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1727 if (!tag || !tag->name || !tag->value)
1730 size = strlen(tag->name) + 8 + 1;
1731 key = av_mallocz(size);
1733 return AVERROR(ENOMEM);
1735 snprintf(key, size, "comment_%s", tag->name);
1736 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1741 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1743 MXFPackage *physical_package = NULL;
1744 MXFTrack *physical_track = NULL;
1745 MXFStructuralComponent *sourceclip = NULL;
1746 MXFTimecodeComponent *mxf_tc = NULL;
1750 int64_t start_position;
1752 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1753 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1757 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1760 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1762 /* the name of physical source package is name of the reel or tape */
1763 if (physical_package->name && physical_package->name[0])
1764 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1766 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1767 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1769 for (j = 0; j < physical_package->tracks_count; j++) {
1770 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1771 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1775 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1776 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1780 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1781 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1784 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1785 /* scale sourceclip start_position to match physical track edit rate */
1786 start_position = av_rescale_q(sourceclip->start_position,
1787 physical_track->edit_rate,
1788 source_track->edit_rate);
1790 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1791 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1801 static int mxf_parse_structural_metadata(MXFContext *mxf)
1803 MXFPackage *material_package = NULL;
1806 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1807 /* TODO: handle multiple material packages (OP3x) */
1808 for (i = 0; i < mxf->packages_count; i++) {
1809 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1810 if (material_package) break;
1812 if (!material_package) {
1813 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1814 return AVERROR_INVALIDDATA;
1817 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1818 if (material_package->name && material_package->name[0])
1819 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1820 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1822 for (i = 0; i < material_package->tracks_count; i++) {
1823 MXFPackage *source_package = NULL;
1824 MXFTrack *material_track = NULL;
1825 MXFTrack *source_track = NULL;
1826 MXFTrack *temp_track = NULL;
1827 MXFDescriptor *descriptor = NULL;
1828 MXFStructuralComponent *component = NULL;
1829 MXFTimecodeComponent *mxf_tc = NULL;
1830 UID *essence_container_ul = NULL;
1831 const MXFCodecUL *codec_ul = NULL;
1832 const MXFCodecUL *container_ul = NULL;
1833 const MXFCodecUL *pix_fmt_ul = NULL;
1838 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1839 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1843 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1844 mxf_tc = (MXFTimecodeComponent*)component;
1845 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1846 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1847 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1851 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1852 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1856 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1857 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1861 mxf_tc = (MXFTimecodeComponent*)component;
1862 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1863 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1864 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1869 /* TODO: handle multiple source clips */
1870 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1871 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1875 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1876 if (!source_package) {
1877 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1880 for (k = 0; k < source_package->tracks_count; k++) {
1881 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1882 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1883 ret = AVERROR_INVALIDDATA;
1886 if (temp_track->track_id == component->source_track_id) {
1887 source_track = temp_track;
1891 if (!source_track) {
1892 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1896 if (!source_track || !component)
1899 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1900 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1901 ret = AVERROR_INVALIDDATA;
1905 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1906 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1907 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1908 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1912 st = avformat_new_stream(mxf->fc, NULL);
1914 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1915 ret = AVERROR(ENOMEM);
1918 st->id = source_track->track_id;
1919 st->priv_data = source_track;
1921 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1922 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1924 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1925 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1926 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1927 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1929 source_track->original_duration = st->duration = component->duration;
1931 if (st->duration == -1)
1932 st->duration = AV_NOPTS_VALUE;
1933 st->start_time = component->start_position;
1934 if (material_track->edit_rate.num <= 0 ||
1935 material_track->edit_rate.den <= 0) {
1936 av_log(mxf->fc, AV_LOG_WARNING,
1937 "Invalid edit rate (%d/%d) found on stream #%d, "
1938 "defaulting to 25/1\n",
1939 material_track->edit_rate.num,
1940 material_track->edit_rate.den, st->index);
1941 material_track->edit_rate = (AVRational){25, 1};
1943 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1945 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1946 * the former is accessible via st->priv_data */
1947 source_track->edit_rate = material_track->edit_rate;
1949 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1950 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1951 st->codec->codec_type = codec_ul->id;
1954 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1957 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1958 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1959 essence_container_ul = &descriptor->essence_container_ul;
1960 /* HACK: replacing the original key with mxf_encrypted_essence_container
1961 * is not allowed according to s429-6, try to find correct information anyway */
1962 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1963 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1964 for (k = 0; k < mxf->metadata_sets_count; k++) {
1965 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1966 if (metadata->type == CryptoContext) {
1967 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1973 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1974 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1975 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1976 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
1977 codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->codec_ul);
1978 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1981 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1982 avcodec_get_name(st->codec->codec_id));
1983 for (k = 0; k < 16; k++) {
1984 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1985 descriptor->essence_codec_ul[k]);
1986 if (!(k+1 & 19) || k == 5)
1987 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1989 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1991 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
1992 if (source_package->name && source_package->name[0])
1993 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1995 mxf_parse_physical_source_package(mxf, source_track, st);
1997 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1998 source_track->intra_only = mxf_is_intra_only(descriptor);
1999 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2000 if (st->codec->codec_id == AV_CODEC_ID_NONE)
2001 st->codec->codec_id = container_ul->id;
2002 st->codec->width = descriptor->width;
2003 st->codec->height = descriptor->height; /* Field height, not frame height */
2004 switch (descriptor->frame_layout) {
2005 case SegmentedFrame:
2006 /* This one is a weird layout I don't fully understand. */
2007 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
2010 st->codec->field_order = AV_FIELD_PROGRESSIVE;
2013 /* Every other line is stored and needs to be duplicated. */
2014 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2015 break; /* The correct thing to do here is fall through, but by breaking we might be
2016 able to decode some streams at half the vertical resolution, rather than not al all.
2017 It's also for compatibility with the old behavior. */
2020 case SeparateFields:
2021 switch (descriptor->field_dominance) {
2023 st->codec->field_order = AV_FIELD_TT;
2026 st->codec->field_order = AV_FIELD_BB;
2029 avpriv_request_sample(mxf->fc,
2030 "Field dominance %d support",
2031 descriptor->field_dominance);
2032 case 0: // we already have many samples with field_dominance == unknown
2035 /* Turn field height into frame height. */
2036 st->codec->height *= 2;
2039 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2041 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2042 st->codec->pix_fmt = descriptor->pix_fmt;
2043 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2044 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2045 &descriptor->essence_codec_ul);
2046 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2047 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2048 /* support files created before RP224v10 by defaulting to UYVY422
2049 if subsampling is 4:2:2 and component depth is 8-bit */
2050 if (descriptor->horiz_subsampling == 2 &&
2051 descriptor->vert_subsampling == 1 &&
2052 descriptor->component_depth == 8) {
2053 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
2058 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2059 if (material_track->sequence->origin) {
2060 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2062 if (source_track->sequence->origin) {
2063 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2065 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2066 st->display_aspect_ratio = descriptor->aspect_ratio;
2067 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2068 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2069 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2070 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))
2071 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2072 st->codec->channels = descriptor->channels;
2073 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2075 if (descriptor->sample_rate.den > 0) {
2076 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2077 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2079 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2080 "found for stream #%d, time base forced to 1/48000\n",
2081 descriptor->sample_rate.num, descriptor->sample_rate.den,
2083 avpriv_set_pts_info(st, 64, 1, 48000);
2086 /* if duration is set, rescale it from EditRate to SampleRate */
2087 if (st->duration != AV_NOPTS_VALUE)
2088 st->duration = av_rescale_q(st->duration,
2089 av_inv_q(material_track->edit_rate),
2092 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2093 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2094 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2095 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2096 else if (descriptor->bits_per_sample == 32)
2097 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2098 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2099 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2100 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2101 else if (descriptor->bits_per_sample == 32)
2102 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2103 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2104 st->need_parsing = AVSTREAM_PARSE_FULL;
2106 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2107 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2108 essence_container_ul)->id;
2109 if (codec_id >= 0 &&
2110 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2111 av_dict_set(&st->metadata, "data_type",
2112 mxf_data_essence_descriptor[codec_id], 0);
2115 if (descriptor->extradata) {
2116 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2117 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2119 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2120 ret = ff_generate_avci_extradata(st);
2124 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2125 /* TODO: decode timestamps */
2126 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2135 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2137 struct tm time = { 0 };
2138 time.tm_year = (timestamp >> 48) - 1900;
2139 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2140 time.tm_mday = (timestamp >> 32 & 0xFF);
2141 time.tm_hour = (timestamp >> 24 & 0xFF);
2142 time.tm_min = (timestamp >> 16 & 0xFF);
2143 time.tm_sec = (timestamp >> 8 & 0xFF);
2145 /* msvcrt versions of strftime calls the invalid parameter handler
2146 * (aborting the process if one isn't set) if the parameters are out
2148 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2149 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2150 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2151 time.tm_min = av_clip(time.tm_min, 0, 59);
2152 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2154 *str = av_mallocz(32);
2156 return AVERROR(ENOMEM);
2157 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2163 #define SET_STR_METADATA(pb, name, str) do { \
2164 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2166 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2169 #define SET_UID_METADATA(pb, name, var, str) do { \
2170 avio_read(pb, var, 16); \
2171 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2173 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2176 #define SET_TS_METADATA(pb, name, var, str) do { \
2177 var = avio_rb64(pb); \
2178 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2180 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2183 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2185 MXFContext *mxf = arg;
2186 AVFormatContext *s = mxf->fc;
2193 SET_STR_METADATA(pb, "company_name", str);
2196 SET_STR_METADATA(pb, "product_name", str);
2199 SET_STR_METADATA(pb, "product_version", str);
2202 SET_UID_METADATA(pb, "product_uid", uid, str);
2205 SET_TS_METADATA(pb, "modification_date", ts, str);
2208 SET_STR_METADATA(pb, "application_platform", str);
2211 SET_UID_METADATA(pb, "generation_uid", uid, str);
2214 SET_UID_METADATA(pb, "uid", uid, str);
2220 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2222 MXFContext *mxf = arg;
2223 AVFormatContext *s = mxf->fc;
2227 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2228 SET_STR_METADATA(pb, "project_name", str);
2233 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2234 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2235 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2236 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2237 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2238 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2239 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2240 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2241 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2242 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2243 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2244 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2245 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2246 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2247 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2248 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2249 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2250 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2251 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2252 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2253 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2254 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2255 { { 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 */
2256 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2257 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2258 { { 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 */
2259 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2260 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2261 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2262 { { 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 */
2263 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2264 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2265 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2266 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2267 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2268 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2269 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2270 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2273 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2276 case MultipleDescriptor:
2278 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2279 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2287 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2289 AVIOContext *pb = mxf->fc->pb;
2290 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2291 uint64_t klv_end = avio_tell(pb) + klv->length;
2294 return AVERROR(ENOMEM);
2295 mxf_metadataset_init(ctx, type);
2296 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2298 int tag = avio_rb16(pb);
2299 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2300 uint64_t next = avio_tell(pb) + size;
2303 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2304 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2305 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2308 if (tag > 0x7FFF) { /* dynamic tag */
2310 for (i = 0; i < mxf->local_tags_count; i++) {
2311 int local_tag = AV_RB16(mxf->local_tags+i*18);
2312 if (local_tag == tag) {
2313 memcpy(uid, mxf->local_tags+i*18+2, 16);
2314 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2315 PRINT_KEY(mxf->fc, "uid", uid);
2319 if (ctx_size && tag == 0x3C0A) {
2320 avio_read(pb, ctx->uid, 16);
2321 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2322 mxf_free_metadataset(&ctx, !!ctx_size);
2326 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2327 * it extending past the end of the KLV though (zzuf5.mxf). */
2328 if (avio_tell(pb) > klv_end) {
2331 mxf_free_metadataset(&ctx, !!ctx_size);
2334 av_log(mxf->fc, AV_LOG_ERROR,
2335 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2337 return AVERROR_INVALIDDATA;
2338 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2339 avio_seek(pb, next, SEEK_SET);
2341 if (ctx_size) ctx->type = type;
2342 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2346 * Matches any partition pack key, in other words:
2350 * @return non-zero if the key is a partition pack key, zero otherwise
2352 static int mxf_is_partition_pack_key(UID key)
2354 //NOTE: this is a little lax since it doesn't constraint key[14]
2355 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2356 key[13] >= 2 && key[13] <= 4;
2360 * Parses a metadata KLV
2361 * @return <0 on error, 0 otherwise
2363 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2364 int ctx_size, enum MXFMetadataSetType type)
2366 AVFormatContext *s = mxf->fc;
2368 if (klv.key[5] == 0x53) {
2369 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2371 uint64_t next = avio_tell(s->pb) + klv.length;
2372 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2374 /* only seek forward, else this can loop for a long time */
2375 if (avio_tell(s->pb) > next) {
2376 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2378 return AVERROR_INVALIDDATA;
2381 avio_seek(s->pb, next, SEEK_SET);
2384 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2391 * Seeks to the previous partition and parses it, if possible
2392 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2394 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2396 AVIOContext *pb = mxf->fc->pb;
2398 int64_t current_partition_ofs;
2401 if (!mxf->current_partition ||
2402 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2403 return 0; /* we've parsed all partitions */
2405 /* seek to previous partition */
2406 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2407 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2408 mxf->current_partition = NULL;
2410 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2412 /* Make sure this is actually a PartitionPack, and if so parse it.
2415 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2416 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2420 if (!mxf_is_partition_pack_key(klv.key)) {
2421 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2422 return AVERROR_INVALIDDATA;
2425 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2426 * can point to just before the current partition, causing klv_read_packet()
2427 * to sync back up to it. See deadlock3.mxf
2429 if (klv.offset >= current_partition_ofs) {
2430 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2431 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2432 return AVERROR_INVALIDDATA;
2435 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2442 * Called when essence is encountered
2443 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2445 static int mxf_parse_handle_essence(MXFContext *mxf)
2447 AVIOContext *pb = mxf->fc->pb;
2450 if (mxf->parsing_backward) {
2451 return mxf_seek_to_previous_partition(mxf);
2453 if (!mxf->footer_partition) {
2454 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2458 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2460 /* remember where we were so we don't end up seeking further back than this */
2461 mxf->last_forward_tell = avio_tell(pb);
2463 if (!pb->seekable) {
2464 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2468 /* seek to FooterPartition and parse backward */
2469 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2470 av_log(mxf->fc, AV_LOG_ERROR,
2471 "failed to seek to FooterPartition @ 0x%" PRIx64
2472 " (%"PRId64") - partial file?\n",
2473 mxf->run_in + mxf->footer_partition, ret);
2477 mxf->current_partition = NULL;
2478 mxf->parsing_backward = 1;
2485 * Called when the next partition or EOF is encountered
2486 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2488 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2490 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2494 * Figures out the proper offset and length of the essence container in each partition
2496 static void mxf_compute_essence_containers(MXFContext *mxf)
2500 /* everything is already correct */
2501 if (mxf->op == OPAtom)
2504 for (x = 0; x < mxf->partitions_count; x++) {
2505 MXFPartition *p = &mxf->partitions[x];
2508 continue; /* BodySID == 0 -> no essence */
2510 if (x >= mxf->partitions_count - 1)
2511 break; /* FooterPartition - can't compute length (and we don't need to) */
2513 /* essence container spans to the next partition */
2514 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2516 if (p->essence_length < 0) {
2517 /* next ThisPartition < essence_offset */
2518 p->essence_length = 0;
2519 av_log(mxf->fc, AV_LOG_ERROR,
2520 "partition %i: bad ThisPartition = %"PRIX64"\n",
2521 x+1, mxf->partitions[x+1].this_partition);
2526 static int64_t round_to_kag(int64_t position, int kag_size)
2528 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2529 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2530 int64_t ret = (position / kag_size) * kag_size;
2531 return ret == position ? ret : ret + kag_size;
2534 static int is_pcm(enum AVCodecID codec_id)
2536 /* we only care about "normal" PCM codecs until we get samples */
2537 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2541 * Deal with the case where for some audio atoms EditUnitByteCount is
2542 * very small (2, 4..). In those cases we should read more than one
2543 * sample per call to mxf_read_packet().
2545 static void mxf_handle_small_eubc(AVFormatContext *s)
2547 MXFContext *mxf = s->priv_data;
2549 /* assuming non-OPAtom == frame wrapped
2550 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2551 if (mxf->op != OPAtom)
2554 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2555 if (s->nb_streams != 1 ||
2556 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2557 !is_pcm(s->streams[0]->codec->codec_id) ||
2558 mxf->nb_index_tables != 1 ||
2559 mxf->index_tables[0].nb_segments != 1 ||
2560 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2563 /* arbitrarily default to 48 kHz PAL audio frame size */
2564 /* TODO: We could compute this from the ratio between the audio
2565 * and video edit rates for 48 kHz NTSC we could use the
2566 * 1802-1802-1802-1802-1801 pattern. */
2567 mxf->edit_units_per_packet = 1920;
2571 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2573 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2575 AVFormatContext *s = mxf->fc;
2576 AVStream *st = NULL;
2577 MXFIndexTableSegment *segment = NULL;
2578 MXFPartition *p = NULL;
2579 int essence_partition_count = 0;
2582 if (mxf->op != OPAtom)
2585 /* TODO: support raw video without a index if they exist */
2586 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2589 /* check if file already has a IndexTableSegment */
2590 for (i = 0; i < mxf->metadata_sets_count; i++) {
2591 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2595 /* find the essence partition */
2596 for (i = 0; i < mxf->partitions_count; i++) {
2597 /* BodySID == 0 -> no essence */
2598 if (!mxf->partitions[i].body_sid)
2601 p = &mxf->partitions[i];
2602 essence_partition_count++;
2605 /* only handle files with a single essence partition */
2606 if (essence_partition_count != 1)
2609 if (!(segment = av_mallocz(sizeof(*segment))))
2610 return AVERROR(ENOMEM);
2612 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2613 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2618 segment->type = IndexTableSegment;
2619 /* stream will be treated as small EditUnitByteCount */
2620 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2621 segment->index_start_position = 0;
2622 segment->index_duration = s->streams[0]->duration;
2623 segment->index_sid = p->index_sid;
2624 segment->body_sid = p->body_sid;
2628 static void mxf_read_random_index_pack(AVFormatContext *s)
2630 MXFContext *mxf = s->priv_data;
2632 int64_t file_size, max_rip_length, min_rip_length;
2635 if (!s->pb->seekable)
2638 file_size = avio_size(s->pb);
2640 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2641 * The limit below assumes a file with nothing but partition packs and a RIP.
2642 * Before changing this, consider that a muxer may place each sample in its own partition.
2644 * 105 is the size of the smallest possible PartitionPack
2645 * 12 is the size of each RIP entry
2646 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2648 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2649 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2651 /* We're only interested in RIPs with at least two entries.. */
2652 min_rip_length = 16+1+24+4;
2654 /* See S377m section 11 */
2655 avio_seek(s->pb, file_size - 4, SEEK_SET);
2656 length = avio_rb32(s->pb);
2658 if (length < min_rip_length || length > max_rip_length)
2660 avio_seek(s->pb, file_size - length, SEEK_SET);
2661 if (klv_read_packet(&klv, s->pb) < 0 ||
2662 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2663 klv.length != length - 20)
2666 avio_skip(s->pb, klv.length - 12);
2667 mxf->footer_partition = avio_rb64(s->pb);
2670 if (mxf->run_in + mxf->footer_partition >= file_size) {
2671 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2672 mxf->footer_partition = 0;
2676 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2679 static int mxf_read_header(AVFormatContext *s)
2681 MXFContext *mxf = s->priv_data;
2683 int64_t essence_offset = 0;
2686 mxf->last_forward_tell = INT64_MAX;
2687 mxf->edit_units_per_packet = 1;
2689 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2690 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2691 return AVERROR_INVALIDDATA;
2693 avio_seek(s->pb, -14, SEEK_CUR);
2695 mxf->run_in = avio_tell(s->pb);
2697 mxf_read_random_index_pack(s);
2699 while (!avio_feof(s->pb)) {
2700 const MXFMetadataReadTableEntry *metadata;
2702 if (klv_read_packet(&klv, s->pb) < 0) {
2703 /* EOF - seek to previous partition or stop */
2704 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2710 PRINT_KEY(s, "read header", klv.key);
2711 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2712 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2713 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2714 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2715 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2717 if (!mxf->current_partition) {
2718 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2719 return AVERROR_INVALIDDATA;
2722 if (!mxf->current_partition->essence_offset) {
2723 /* for OP1a we compute essence_offset
2724 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2725 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2726 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2728 int64_t op1a_essence_offset =
2729 round_to_kag(mxf->current_partition->this_partition +
2730 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2731 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2732 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2734 if (mxf->op == OPAtom) {
2735 /* point essence_offset to the actual data
2736 * OPAtom has all the essence in one big KLV
2738 mxf->current_partition->essence_offset = avio_tell(s->pb);
2739 mxf->current_partition->essence_length = klv.length;
2741 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2742 mxf->current_partition->essence_offset = op1a_essence_offset;
2746 if (!essence_offset)
2747 essence_offset = klv.offset;
2749 /* seek to footer, previous partition or stop */
2750 if (mxf_parse_handle_essence(mxf) <= 0)
2753 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2754 /* next partition pack - keep going, seek to previous partition or stop */
2755 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2757 else if (mxf->parsing_backward)
2759 /* we're still parsing forward. proceed to parsing this partition pack */
2762 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2763 if (IS_KLV_KEY(klv.key, metadata->key)) {
2764 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2768 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2772 if (!metadata->read)
2773 avio_skip(s->pb, klv.length);
2775 /* FIXME avoid seek */
2776 if (!essence_offset) {
2777 av_log(s, AV_LOG_ERROR, "no essence\n");
2778 ret = AVERROR_INVALIDDATA;
2781 avio_seek(s->pb, essence_offset, SEEK_SET);
2783 mxf_compute_essence_containers(mxf);
2785 /* we need to do this before computing the index tables
2786 * to be able to fill in zero IndexDurations with st->duration */
2787 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2790 mxf_handle_missing_index_segment(mxf);
2791 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2794 if (mxf->nb_index_tables > 1) {
2795 /* TODO: look up which IndexSID to use via EssenceContainerData */
2796 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2797 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2798 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2799 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2800 ret = AVERROR_INVALIDDATA;
2804 mxf_handle_small_eubc(s);
2814 * Sets mxf->current_edit_unit based on what offset we're currently at.
2815 * @return next_ofs if OK, <0 on error
2817 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2819 int64_t last_ofs = -1, next_ofs = -1;
2820 MXFIndexTable *t = &mxf->index_tables[0];
2822 /* this is called from the OP1a demuxing logic, which means there
2823 * may be no index tables */
2824 if (mxf->nb_index_tables <= 0)
2827 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2828 while (mxf->current_edit_unit >= 0) {
2829 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2832 if (next_ofs <= last_ofs) {
2833 /* large next_ofs didn't change or current_edit_unit wrapped
2834 * around this fixes the infinite loop on zzuf3.mxf */
2835 av_log(mxf->fc, AV_LOG_ERROR,
2836 "next_ofs didn't change. not deriving packet timestamps\n");
2840 if (next_ofs > current_offset)
2843 last_ofs = next_ofs;
2844 mxf->current_edit_unit++;
2847 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2848 if (mxf->current_edit_unit < 0)
2854 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2855 uint64_t *sample_count)
2857 int i, total = 0, size = 0;
2858 AVStream *st = mxf->fc->streams[stream_index];
2859 MXFTrack *track = st->priv_data;
2860 AVRational time_base = av_inv_q(track->edit_rate);
2861 AVRational sample_rate = av_inv_q(st->time_base);
2862 const MXFSamplesPerFrame *spf = NULL;
2864 if ((sample_rate.num / sample_rate.den) == 48000)
2865 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2867 int remainder = (sample_rate.num * time_base.num) %
2868 (time_base.den * sample_rate.den);
2869 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2870 av_mul_q(sample_rate, time_base)));
2872 av_log(mxf->fc, AV_LOG_WARNING,
2873 "seeking detected on stream #%d with time base (%d/%d) and "
2874 "sample rate (%d/%d), audio pts won't be accurate.\n",
2875 stream_index, time_base.num, time_base.den,
2876 sample_rate.num, sample_rate.den);
2880 while (spf->samples_per_frame[size]) {
2881 total += spf->samples_per_frame[size];
2887 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2888 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2889 *sample_count += spf->samples_per_frame[i];
2895 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2898 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2899 int64_t bits_per_sample = codec->bits_per_coded_sample;
2901 if (!bits_per_sample)
2902 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2904 pkt->pts = track->sample_count;
2906 if ( codec->channels <= 0
2907 || bits_per_sample <= 0
2908 || codec->channels * (int64_t)bits_per_sample < 8)
2909 return AVERROR(EINVAL);
2910 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2914 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2917 MXFContext *mxf = s->priv_data;
2920 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2921 PRINT_KEY(s, "read packet", klv.key);
2922 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2923 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2924 ret = mxf_decrypt_triplet(s, pkt, &klv);
2926 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2931 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2932 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2933 int index = mxf_get_stream_index(s, &klv);
2934 int64_t next_ofs, next_klv;
2937 AVCodecContext *codec;
2940 av_log(s, AV_LOG_ERROR,
2941 "error getting stream index %"PRIu32"\n",
2942 AV_RB32(klv.key + 12));
2946 st = s->streams[index];
2947 track = st->priv_data;
2949 if (s->streams[index]->discard == AVDISCARD_ALL)
2952 next_klv = avio_tell(s->pb) + klv.length;
2953 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2955 if (next_ofs >= 0 && next_klv > next_ofs) {
2956 /* if this check is hit then it's possible OPAtom was treated as OP1a
2957 * truncate the packet since it's probably very large (>2 GiB is common) */
2958 avpriv_request_sample(s,
2959 "OPAtom misinterpreted as OP1a?"
2960 "KLV for edit unit %i extending into "
2962 mxf->current_edit_unit);
2963 klv.length = next_ofs - avio_tell(s->pb);
2966 /* check for 8 channels AES3 element */
2967 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2968 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2971 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2975 ret = av_get_packet(s->pb, pkt, klv.length);
2979 pkt->stream_index = index;
2980 pkt->pos = klv.offset;
2984 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2985 /* mxf->current_edit_unit good - see if we have an
2986 * index table to derive timestamps from */
2987 MXFIndexTable *t = &mxf->index_tables[0];
2989 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2990 pkt->dts = mxf->current_edit_unit + t->first_dts;
2991 pkt->pts = t->ptses[mxf->current_edit_unit];
2992 } else if (track->intra_only) {
2993 /* intra-only -> PTS = EditUnit.
2994 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2995 pkt->pts = mxf->current_edit_unit;
2997 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2998 ret = mxf_set_audio_pts(mxf, codec, pkt);
3003 /* seek for truncated packets */
3004 avio_seek(s->pb, next_klv, SEEK_SET);
3009 avio_skip(s->pb, klv.length);
3011 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3014 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3016 MXFContext *mxf = s->priv_data;
3018 int64_t ret64, pos, next_pos;
3023 if (mxf->op != OPAtom)
3024 return mxf_read_packet_old(s, pkt);
3026 // If we have no streams then we basically are at EOF
3027 if (s->nb_streams < 1)
3030 /* OPAtom - clip wrapped demuxing */
3031 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3033 t = &mxf->index_tables[0];
3035 if (mxf->current_edit_unit >= st->duration)
3038 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3040 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3043 /* compute size by finding the next edit unit or the end of the essence container
3044 * not pretty, but it works */
3045 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3046 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3047 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3048 return AVERROR_INVALIDDATA;
3051 if ((size = next_pos - pos) <= 0) {
3052 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3053 return AVERROR_INVALIDDATA;
3056 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3059 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3062 pkt->stream_index = 0;
3064 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3065 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3066 pkt->dts = mxf->current_edit_unit + t->first_dts;
3067 pkt->pts = t->ptses[mxf->current_edit_unit];
3068 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3069 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3074 mxf->current_edit_unit += edit_units;
3079 static int mxf_read_close(AVFormatContext *s)
3081 MXFContext *mxf = s->priv_data;
3084 av_freep(&mxf->packages_refs);
3086 for (i = 0; i < s->nb_streams; i++)
3087 s->streams[i]->priv_data = NULL;
3089 for (i = 0; i < mxf->metadata_sets_count; i++) {
3090 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3092 av_freep(&mxf->partitions);
3093 av_freep(&mxf->metadata_sets);
3094 av_freep(&mxf->aesc);
3095 av_freep(&mxf->local_tags);
3097 if (mxf->index_tables) {
3098 for (i = 0; i < mxf->nb_index_tables; i++) {
3099 av_freep(&mxf->index_tables[i].segments);
3100 av_freep(&mxf->index_tables[i].ptses);
3101 av_freep(&mxf->index_tables[i].fake_index);
3102 av_freep(&mxf->index_tables[i].offsets);
3105 av_freep(&mxf->index_tables);
3110 static int mxf_probe(AVProbeData *p) {
3111 const uint8_t *bufp = p->buf;
3112 const uint8_t *end = p->buf + p->buf_size;
3114 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3117 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3118 end -= sizeof(mxf_header_partition_pack_key);
3120 for (; bufp < end;) {
3121 if (!((bufp[13] - 1) & 0xF2)){
3122 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3123 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3124 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3125 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3126 return AVPROBE_SCORE_MAX;
3135 /* rudimentary byte seek */
3136 /* XXX: use MXF Index */
3137 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3139 AVStream *st = s->streams[stream_index];
3141 MXFContext* mxf = s->priv_data;
3145 MXFTrack *source_track = st->priv_data;
3147 /* if audio then truncate sample_time to EditRate */
3148 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3149 sample_time = av_rescale_q(sample_time, st->time_base,
3150 av_inv_q(source_track->edit_rate));
3152 if (mxf->nb_index_tables <= 0) {
3154 return AVERROR_INVALIDDATA;
3155 if (sample_time < 0)
3157 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3159 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3163 ff_update_cur_dts(s, st, sample_time);
3164 mxf->current_edit_unit = sample_time;
3166 t = &mxf->index_tables[0];
3168 /* clamp above zero, else ff_index_search_timestamp() returns negative
3169 * this also means we allow seeking before the start */
3170 sample_time = FFMAX(sample_time, 0);
3172 if (t->fake_index) {
3173 /* behave as if we have a proper index */
3174 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3176 /* get the stored order index from the display order index */
3177 sample_time += t->offsets[sample_time];
3179 /* no IndexEntryArray (one or more CBR segments)
3180 * make sure we don't seek past the end */
3181 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3184 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3187 ff_update_cur_dts(s, st, sample_time);
3188 mxf->current_edit_unit = sample_time;
3189 avio_seek(s->pb, seekpos, SEEK_SET);
3192 // Update all tracks sample count
3193 for (i = 0; i < s->nb_streams; i++) {
3194 AVStream *cur_st = s->streams[i];
3195 MXFTrack *cur_track = cur_st->priv_data;
3196 uint64_t current_sample_count = 0;
3197 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3198 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3202 cur_track->sample_count = current_sample_count;
3208 AVInputFormat ff_mxf_demuxer = {
3210 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3211 .priv_data_size = sizeof(MXFContext),
3212 .read_probe = mxf_probe,
3213 .read_header = mxf_read_header,
3214 .read_packet = mxf_read_packet,
3215 .read_close = mxf_read_close,
3216 .read_seek = mxf_read_seek,