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,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1125 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x10,0x60,0x01 }, 14, AV_CODEC_ID_H264 }, /* H264 Frame wrapped */
1126 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x12,0x01,0x00 }, 14, AV_CODEC_ID_VC1 }, /* VC-1 Frame wrapped */
1127 { { 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 */
1128 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x04,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* Type D-10 mapping of 40Mbps 525/60-I */
1129 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1130 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1131 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1132 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1135 /* EC ULs for intra-only formats */
1136 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1137 { { 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 */
1138 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1141 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1142 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1143 { { 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 */
1144 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1145 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1148 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1149 // sound essence container uls
1150 { { 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 */
1151 { { 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 */
1152 { { 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 */
1153 { { 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 */
1154 { { 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) */
1155 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1158 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1159 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1160 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1163 static const char* const mxf_data_essence_descriptor[] = {
1164 "vbi_vanc_smpte_436M",
1167 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1169 int i, j, nb_segments = 0;
1170 MXFIndexTableSegment **unsorted_segments;
1171 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1173 /* count number of segments, allocate arrays and copy unsorted segments */
1174 for (i = 0; i < mxf->metadata_sets_count; i++)
1175 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1179 return AVERROR_INVALIDDATA;
1181 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1182 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1183 av_freep(sorted_segments);
1184 av_free(unsorted_segments);
1185 return AVERROR(ENOMEM);
1188 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1189 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1190 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1192 *nb_sorted_segments = 0;
1194 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1195 for (i = 0; i < nb_segments; i++) {
1196 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1197 uint64_t best_index_duration = 0;
1199 for (j = 0; j < nb_segments; j++) {
1200 MXFIndexTableSegment *s = unsorted_segments[j];
1202 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1203 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1204 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1206 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1207 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1208 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1210 best_body_sid = s->body_sid;
1211 best_index_sid = s->index_sid;
1212 best_index_start = s->index_start_position;
1213 best_index_duration = s->index_duration;
1217 /* no suitable entry found -> we're done */
1221 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1222 last_body_sid = best_body_sid;
1223 last_index_sid = best_index_sid;
1224 last_index_start = best_index_start;
1227 av_free(unsorted_segments);
1233 * Computes the absolute file offset of the given essence container offset
1235 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1238 int64_t offset_in = offset; /* for logging */
1240 for (x = 0; x < mxf->partitions_count; x++) {
1241 MXFPartition *p = &mxf->partitions[x];
1243 if (p->body_sid != body_sid)
1246 if (offset < p->essence_length || !p->essence_length) {
1247 *offset_out = p->essence_offset + offset;
1251 offset -= p->essence_length;
1254 av_log(mxf->fc, AV_LOG_ERROR,
1255 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1256 offset_in, body_sid);
1258 return AVERROR_INVALIDDATA;
1262 * Returns the end position of the essence container with given BodySID, or zero if unknown
1264 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1269 for (x = 0; x < mxf->partitions_count; x++) {
1270 MXFPartition *p = &mxf->partitions[x];
1272 if (p->body_sid != body_sid)
1275 if (!p->essence_length)
1278 ret = p->essence_offset + p->essence_length;
1284 /* EditUnit -> absolute offset */
1285 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)
1288 int64_t offset_temp = 0;
1290 for (i = 0; i < index_table->nb_segments; i++) {
1291 MXFIndexTableSegment *s = index_table->segments[i];
1293 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1295 if (edit_unit < s->index_start_position + s->index_duration) {
1296 int64_t index = edit_unit - s->index_start_position;
1298 if (s->edit_unit_byte_count)
1299 offset_temp += s->edit_unit_byte_count * index;
1300 else if (s->nb_index_entries) {
1301 if (s->nb_index_entries == 2 * s->index_duration + 1)
1302 index *= 2; /* Avid index */
1304 if (index < 0 || index >= s->nb_index_entries) {
1305 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1306 index_table->index_sid, s->index_start_position);
1307 return AVERROR_INVALIDDATA;
1310 offset_temp = s->stream_offset_entries[index];
1312 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1313 index_table->index_sid, s->index_start_position);
1314 return AVERROR_INVALIDDATA;
1318 *edit_unit_out = edit_unit;
1320 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1322 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1323 offset_temp += s->edit_unit_byte_count * s->index_duration;
1328 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);
1330 return AVERROR_INVALIDDATA;
1333 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1336 int8_t max_temporal_offset = -128;
1339 /* first compute how many entries we have */
1340 for (i = 0; i < index_table->nb_segments; i++) {
1341 MXFIndexTableSegment *s = index_table->segments[i];
1343 if (!s->nb_index_entries) {
1344 index_table->nb_ptses = 0;
1345 return 0; /* no TemporalOffsets */
1348 index_table->nb_ptses += s->index_duration;
1351 /* paranoid check */
1352 if (index_table->nb_ptses <= 0)
1355 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1356 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1357 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1358 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1359 av_freep(&index_table->ptses);
1360 av_freep(&index_table->fake_index);
1361 av_freep(&index_table->offsets);
1362 return AVERROR(ENOMEM);
1365 /* we may have a few bad TemporalOffsets
1366 * make sure the corresponding PTSes don't have the bogus value 0 */
1367 for (x = 0; x < index_table->nb_ptses; x++)
1368 index_table->ptses[x] = AV_NOPTS_VALUE;
1382 * We want to transform it into this:
1393 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1394 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1395 * The latter makes DTS <= PTS.
1397 for (i = x = 0; i < index_table->nb_segments; i++) {
1398 MXFIndexTableSegment *s = index_table->segments[i];
1399 int index_delta = 1;
1400 int n = s->nb_index_entries;
1402 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1403 index_delta = 2; /* Avid index */
1404 /* ignore the last entry - it's the size of the essence container */
1408 for (j = 0; j < n; j += index_delta, x++) {
1409 int offset = s->temporal_offset_entries[j] / index_delta;
1410 int index = x + offset;
1412 if (x >= index_table->nb_ptses) {
1413 av_log(mxf->fc, AV_LOG_ERROR,
1414 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1415 s->nb_index_entries, s->index_duration);
1419 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1421 if (index < 0 || index >= index_table->nb_ptses) {
1422 av_log(mxf->fc, AV_LOG_ERROR,
1423 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1428 index_table->offsets[x] = offset;
1429 index_table->ptses[index] = x;
1430 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1434 /* calculate the fake index table in display order */
1435 for (x = 0; x < index_table->nb_ptses; x++) {
1436 index_table->fake_index[x].timestamp = x;
1437 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1438 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1442 index_table->first_dts = -max_temporal_offset;
1448 * Sorts and collects index table segments into index tables.
1449 * Also computes PTSes if possible.
1451 static int mxf_compute_index_tables(MXFContext *mxf)
1453 int i, j, k, ret, nb_sorted_segments;
1454 MXFIndexTableSegment **sorted_segments = NULL;
1456 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1457 nb_sorted_segments <= 0) {
1458 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1462 /* sanity check and count unique BodySIDs/IndexSIDs */
1463 for (i = 0; i < nb_sorted_segments; i++) {
1464 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1465 mxf->nb_index_tables++;
1466 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1467 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1468 ret = AVERROR_INVALIDDATA;
1469 goto finish_decoding_index;
1473 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1474 sizeof(*mxf->index_tables));
1475 if (!mxf->index_tables) {
1476 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1477 ret = AVERROR(ENOMEM);
1478 goto finish_decoding_index;
1481 /* distribute sorted segments to index tables */
1482 for (i = j = 0; i < nb_sorted_segments; i++) {
1483 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1488 mxf->index_tables[j].nb_segments++;
1491 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1492 MXFIndexTable *t = &mxf->index_tables[j];
1494 t->segments = av_mallocz_array(t->nb_segments,
1495 sizeof(*t->segments));
1498 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1499 " pointer array\n");
1500 ret = AVERROR(ENOMEM);
1501 goto finish_decoding_index;
1504 if (sorted_segments[i]->index_start_position)
1505 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1506 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1508 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1509 t->index_sid = sorted_segments[i]->index_sid;
1510 t->body_sid = sorted_segments[i]->body_sid;
1512 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1513 goto finish_decoding_index;
1515 /* fix zero IndexDurations */
1516 for (k = 0; k < t->nb_segments; k++) {
1517 if (t->segments[k]->index_duration)
1520 if (t->nb_segments > 1)
1521 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1524 if (mxf->fc->nb_streams <= 0) {
1525 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1529 /* assume the first stream's duration is reasonable
1530 * leave index_duration = 0 on further segments in case we have any (unlikely)
1532 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1538 finish_decoding_index:
1539 av_free(sorted_segments);
1543 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1545 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1546 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1547 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1548 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1551 static int mxf_uid_to_str(UID uid, char **str)
1555 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1557 return AVERROR(ENOMEM);
1558 for (i = 0; i < sizeof(UID); i++) {
1559 snprintf(p, 2 + 1, "%.2x", uid[i]);
1561 if (i == 3 || i == 5 || i == 7 || i == 9) {
1562 snprintf(p, 1 + 1, "-");
1569 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1573 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1575 return AVERROR(ENOMEM);
1576 snprintf(p, 2 + 1, "0x");
1578 for (i = 0; i < sizeof(UID); i++) {
1579 snprintf(p, 2 + 1, "%.2X", ul[i]);
1583 for (i = 0; i < sizeof(UID); i++) {
1584 snprintf(p, 2 + 1, "%.2X", uid[i]);
1590 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1596 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1598 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1602 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1604 char buf[AV_TIMECODE_STR_SIZE];
1605 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1610 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1612 MXFStructuralComponent *component = NULL;
1613 MXFPulldownComponent *pulldown = NULL;
1615 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1619 switch (component->type) {
1620 case TimecodeComponent:
1621 return (MXFTimecodeComponent*)component;
1622 case PulldownComponent: /* timcode component may be located on a pulldown component */
1623 pulldown = (MXFPulldownComponent*)component;
1624 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1631 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1633 MXFPackage *package = NULL;
1636 for (i = 0; i < mxf->packages_count; i++) {
1637 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1641 if (!memcmp(package->package_uid, package_uid, 16))
1647 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1649 MXFDescriptor *sub_descriptor = NULL;
1655 if (descriptor->type == MultipleDescriptor) {
1656 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1657 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1659 if (!sub_descriptor) {
1660 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1663 if (sub_descriptor->linked_track_id == track_id) {
1664 return sub_descriptor;
1667 } else if (descriptor->type == Descriptor)
1673 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1675 MXFStructuralComponent *component = NULL;
1676 MXFPackage *package = NULL;
1677 MXFDescriptor *descriptor = NULL;
1680 if (!essence_group || !essence_group->structural_components_count)
1683 /* essence groups contains multiple representations of the same media,
1684 this return the first components with a valid Descriptor typically index 0 */
1685 for (i =0; i < essence_group->structural_components_count; i++){
1686 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1690 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1693 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1700 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1702 MXFStructuralComponent *component = NULL;
1704 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1707 switch (component->type) {
1711 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1718 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1720 MXFTaggedValue *tag;
1724 for (i = 0; i < package->comment_count; i++) {
1725 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1726 if (!tag || !tag->name || !tag->value)
1729 size = strlen(tag->name) + 8 + 1;
1730 key = av_mallocz(size);
1732 return AVERROR(ENOMEM);
1734 snprintf(key, size, "comment_%s", tag->name);
1735 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1740 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1742 MXFPackage *physical_package = NULL;
1743 MXFTrack *physical_track = NULL;
1744 MXFStructuralComponent *sourceclip = NULL;
1745 MXFTimecodeComponent *mxf_tc = NULL;
1749 int64_t start_position;
1751 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1752 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1756 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1759 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1761 /* the name of physical source package is name of the reel or tape */
1762 if (physical_package->name && physical_package->name[0])
1763 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1765 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1766 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1768 for (j = 0; j < physical_package->tracks_count; j++) {
1769 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1770 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1774 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1775 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1779 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1780 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1783 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1784 /* scale sourceclip start_position to match physical track edit rate */
1785 start_position = av_rescale_q(sourceclip->start_position,
1786 physical_track->edit_rate,
1787 source_track->edit_rate);
1789 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1790 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1800 static int mxf_parse_structural_metadata(MXFContext *mxf)
1802 MXFPackage *material_package = NULL;
1805 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1806 /* TODO: handle multiple material packages (OP3x) */
1807 for (i = 0; i < mxf->packages_count; i++) {
1808 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1809 if (material_package) break;
1811 if (!material_package) {
1812 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1813 return AVERROR_INVALIDDATA;
1816 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1817 if (material_package->name && material_package->name[0])
1818 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1819 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1821 for (i = 0; i < material_package->tracks_count; i++) {
1822 MXFPackage *source_package = NULL;
1823 MXFTrack *material_track = NULL;
1824 MXFTrack *source_track = NULL;
1825 MXFTrack *temp_track = NULL;
1826 MXFDescriptor *descriptor = NULL;
1827 MXFStructuralComponent *component = NULL;
1828 MXFTimecodeComponent *mxf_tc = NULL;
1829 UID *essence_container_ul = NULL;
1830 const MXFCodecUL *codec_ul = NULL;
1831 const MXFCodecUL *container_ul = NULL;
1832 const MXFCodecUL *pix_fmt_ul = NULL;
1837 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1838 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1842 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1843 mxf_tc = (MXFTimecodeComponent*)component;
1844 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1845 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1846 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1850 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1851 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1855 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1856 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1860 mxf_tc = (MXFTimecodeComponent*)component;
1861 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1862 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1863 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1868 /* TODO: handle multiple source clips */
1869 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1870 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1874 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1875 if (!source_package) {
1876 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1879 for (k = 0; k < source_package->tracks_count; k++) {
1880 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1881 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1882 ret = AVERROR_INVALIDDATA;
1885 if (temp_track->track_id == component->source_track_id) {
1886 source_track = temp_track;
1890 if (!source_track) {
1891 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1895 if (!source_track || !component)
1898 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1899 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1900 ret = AVERROR_INVALIDDATA;
1904 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1905 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1906 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1907 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1911 st = avformat_new_stream(mxf->fc, NULL);
1913 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1914 ret = AVERROR(ENOMEM);
1917 st->id = source_track->track_id;
1918 st->priv_data = source_track;
1920 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1921 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1923 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1924 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1925 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1926 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1928 source_track->original_duration = st->duration = component->duration;
1930 if (st->duration == -1)
1931 st->duration = AV_NOPTS_VALUE;
1932 st->start_time = component->start_position;
1933 if (material_track->edit_rate.num <= 0 ||
1934 material_track->edit_rate.den <= 0) {
1935 av_log(mxf->fc, AV_LOG_WARNING,
1936 "Invalid edit rate (%d/%d) found on stream #%d, "
1937 "defaulting to 25/1\n",
1938 material_track->edit_rate.num,
1939 material_track->edit_rate.den, st->index);
1940 material_track->edit_rate = (AVRational){25, 1};
1942 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1944 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1945 * the former is accessible via st->priv_data */
1946 source_track->edit_rate = material_track->edit_rate;
1948 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1949 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1950 st->codec->codec_type = codec_ul->id;
1953 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1956 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1957 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1958 essence_container_ul = &descriptor->essence_container_ul;
1959 /* HACK: replacing the original key with mxf_encrypted_essence_container
1960 * is not allowed according to s429-6, try to find correct information anyway */
1961 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1962 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1963 for (k = 0; k < mxf->metadata_sets_count; k++) {
1964 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1965 if (metadata->type == CryptoContext) {
1966 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1972 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1973 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1974 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1975 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
1976 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
1977 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1980 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1981 avcodec_get_name(st->codec->codec_id));
1982 for (k = 0; k < 16; k++) {
1983 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1984 descriptor->essence_codec_ul[k]);
1985 if (!(k+1 & 19) || k == 5)
1986 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1988 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1990 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
1991 if (source_package->name && source_package->name[0])
1992 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1994 mxf_parse_physical_source_package(mxf, source_track, st);
1996 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1997 source_track->intra_only = mxf_is_intra_only(descriptor);
1998 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1999 if (st->codec->codec_id == AV_CODEC_ID_NONE)
2000 st->codec->codec_id = container_ul->id;
2001 st->codec->width = descriptor->width;
2002 st->codec->height = descriptor->height; /* Field height, not frame height */
2003 switch (descriptor->frame_layout) {
2005 st->codec->field_order = AV_FIELD_PROGRESSIVE;
2008 /* Every other line is stored and needs to be duplicated. */
2009 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2010 break; /* The correct thing to do here is fall through, but by breaking we might be
2011 able to decode some streams at half the vertical resolution, rather than not al all.
2012 It's also for compatibility with the old behavior. */
2015 case SegmentedFrame:
2016 st->codec->field_order = AV_FIELD_PROGRESSIVE;
2017 case SeparateFields:
2018 switch (descriptor->field_dominance) {
2020 st->codec->field_order = AV_FIELD_TT;
2023 st->codec->field_order = AV_FIELD_BB;
2026 avpriv_request_sample(mxf->fc,
2027 "Field dominance %d support",
2028 descriptor->field_dominance);
2029 case 0: // we already have many samples with field_dominance == unknown
2032 /* Turn field height into frame height. */
2033 st->codec->height *= 2;
2036 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2038 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2039 st->codec->pix_fmt = descriptor->pix_fmt;
2040 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2041 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2042 &descriptor->essence_codec_ul);
2043 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2044 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2045 st->codec->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2046 &descriptor->essence_codec_ul)->id;
2047 if (!st->codec->codec_tag) {
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;
2059 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2060 if (material_track->sequence->origin) {
2061 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2063 if (source_track->sequence->origin) {
2064 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2066 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2067 st->display_aspect_ratio = descriptor->aspect_ratio;
2068 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2069 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2070 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2071 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))
2072 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2073 st->codec->channels = descriptor->channels;
2074 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2076 if (descriptor->sample_rate.den > 0) {
2077 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2078 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2080 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2081 "found for stream #%d, time base forced to 1/48000\n",
2082 descriptor->sample_rate.num, descriptor->sample_rate.den,
2084 avpriv_set_pts_info(st, 64, 1, 48000);
2087 /* if duration is set, rescale it from EditRate to SampleRate */
2088 if (st->duration != AV_NOPTS_VALUE)
2089 st->duration = av_rescale_q(st->duration,
2090 av_inv_q(material_track->edit_rate),
2093 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2094 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2095 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2096 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2097 else if (descriptor->bits_per_sample == 32)
2098 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2099 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2100 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2101 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2102 else if (descriptor->bits_per_sample == 32)
2103 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2104 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2105 st->need_parsing = AVSTREAM_PARSE_FULL;
2107 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2108 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2109 essence_container_ul)->id;
2110 if (codec_id >= 0 &&
2111 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2112 av_dict_set(&st->metadata, "data_type",
2113 mxf_data_essence_descriptor[codec_id], 0);
2116 if (descriptor->extradata) {
2117 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2118 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2120 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2121 ret = ff_generate_avci_extradata(st);
2125 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2126 /* TODO: decode timestamps */
2127 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2136 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2138 struct tm time = { 0 };
2139 time.tm_year = (timestamp >> 48) - 1900;
2140 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2141 time.tm_mday = (timestamp >> 32 & 0xFF);
2142 time.tm_hour = (timestamp >> 24 & 0xFF);
2143 time.tm_min = (timestamp >> 16 & 0xFF);
2144 time.tm_sec = (timestamp >> 8 & 0xFF);
2146 /* msvcrt versions of strftime calls the invalid parameter handler
2147 * (aborting the process if one isn't set) if the parameters are out
2149 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2150 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2151 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2152 time.tm_min = av_clip(time.tm_min, 0, 59);
2153 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2155 *str = av_mallocz(32);
2157 return AVERROR(ENOMEM);
2158 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2164 #define SET_STR_METADATA(pb, name, str) do { \
2165 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2167 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2170 #define SET_UID_METADATA(pb, name, var, str) do { \
2171 avio_read(pb, var, 16); \
2172 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2174 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2177 #define SET_TS_METADATA(pb, name, var, str) do { \
2178 var = avio_rb64(pb); \
2179 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2181 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2184 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2186 MXFContext *mxf = arg;
2187 AVFormatContext *s = mxf->fc;
2194 SET_STR_METADATA(pb, "company_name", str);
2197 SET_STR_METADATA(pb, "product_name", str);
2200 SET_STR_METADATA(pb, "product_version", str);
2203 SET_UID_METADATA(pb, "product_uid", uid, str);
2206 SET_TS_METADATA(pb, "modification_date", ts, str);
2209 SET_STR_METADATA(pb, "application_platform", str);
2212 SET_UID_METADATA(pb, "generation_uid", uid, str);
2215 SET_UID_METADATA(pb, "uid", uid, str);
2221 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2223 MXFContext *mxf = arg;
2224 AVFormatContext *s = mxf->fc;
2228 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2229 SET_STR_METADATA(pb, "project_name", str);
2234 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2235 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2236 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2237 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2238 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2239 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2240 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2241 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2242 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2243 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2244 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2245 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2246 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2247 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2248 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2249 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2250 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2251 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2252 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2253 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2254 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2255 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2256 { { 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 */
2257 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2258 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2259 { { 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 */
2260 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2261 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2262 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2263 { { 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 */
2264 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2265 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2266 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2267 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2268 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2269 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2270 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2271 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2274 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2277 case MultipleDescriptor:
2279 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2280 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2288 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2290 AVIOContext *pb = mxf->fc->pb;
2291 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2292 uint64_t klv_end = avio_tell(pb) + klv->length;
2295 return AVERROR(ENOMEM);
2296 mxf_metadataset_init(ctx, type);
2297 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2299 int tag = avio_rb16(pb);
2300 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2301 uint64_t next = avio_tell(pb) + size;
2304 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2305 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2306 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2309 if (tag > 0x7FFF) { /* dynamic tag */
2311 for (i = 0; i < mxf->local_tags_count; i++) {
2312 int local_tag = AV_RB16(mxf->local_tags+i*18);
2313 if (local_tag == tag) {
2314 memcpy(uid, mxf->local_tags+i*18+2, 16);
2315 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2316 PRINT_KEY(mxf->fc, "uid", uid);
2320 if (ctx_size && tag == 0x3C0A) {
2321 avio_read(pb, ctx->uid, 16);
2322 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2323 mxf_free_metadataset(&ctx, !!ctx_size);
2327 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2328 * it extending past the end of the KLV though (zzuf5.mxf). */
2329 if (avio_tell(pb) > klv_end) {
2332 mxf_free_metadataset(&ctx, !!ctx_size);
2335 av_log(mxf->fc, AV_LOG_ERROR,
2336 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2338 return AVERROR_INVALIDDATA;
2339 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2340 avio_seek(pb, next, SEEK_SET);
2342 if (ctx_size) ctx->type = type;
2343 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2347 * Matches any partition pack key, in other words:
2351 * @return non-zero if the key is a partition pack key, zero otherwise
2353 static int mxf_is_partition_pack_key(UID key)
2355 //NOTE: this is a little lax since it doesn't constraint key[14]
2356 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2357 key[13] >= 2 && key[13] <= 4;
2361 * Parses a metadata KLV
2362 * @return <0 on error, 0 otherwise
2364 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2365 int ctx_size, enum MXFMetadataSetType type)
2367 AVFormatContext *s = mxf->fc;
2369 if (klv.key[5] == 0x53) {
2370 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2372 uint64_t next = avio_tell(s->pb) + klv.length;
2373 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2375 /* only seek forward, else this can loop for a long time */
2376 if (avio_tell(s->pb) > next) {
2377 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2379 return AVERROR_INVALIDDATA;
2382 avio_seek(s->pb, next, SEEK_SET);
2385 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2392 * Seeks to the previous partition and parses it, if possible
2393 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2395 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2397 AVIOContext *pb = mxf->fc->pb;
2399 int64_t current_partition_ofs;
2402 if (!mxf->current_partition ||
2403 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2404 return 0; /* we've parsed all partitions */
2406 /* seek to previous partition */
2407 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2408 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2409 mxf->current_partition = NULL;
2411 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2413 /* Make sure this is actually a PartitionPack, and if so parse it.
2416 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2417 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2421 if (!mxf_is_partition_pack_key(klv.key)) {
2422 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2423 return AVERROR_INVALIDDATA;
2426 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2427 * can point to just before the current partition, causing klv_read_packet()
2428 * to sync back up to it. See deadlock3.mxf
2430 if (klv.offset >= current_partition_ofs) {
2431 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2432 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2433 return AVERROR_INVALIDDATA;
2436 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2443 * Called when essence is encountered
2444 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2446 static int mxf_parse_handle_essence(MXFContext *mxf)
2448 AVIOContext *pb = mxf->fc->pb;
2451 if (mxf->parsing_backward) {
2452 return mxf_seek_to_previous_partition(mxf);
2454 if (!mxf->footer_partition) {
2455 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2459 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2461 /* remember where we were so we don't end up seeking further back than this */
2462 mxf->last_forward_tell = avio_tell(pb);
2464 if (!pb->seekable) {
2465 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2469 /* seek to FooterPartition and parse backward */
2470 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2471 av_log(mxf->fc, AV_LOG_ERROR,
2472 "failed to seek to FooterPartition @ 0x%" PRIx64
2473 " (%"PRId64") - partial file?\n",
2474 mxf->run_in + mxf->footer_partition, ret);
2478 mxf->current_partition = NULL;
2479 mxf->parsing_backward = 1;
2486 * Called when the next partition or EOF is encountered
2487 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2489 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2491 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2495 * Figures out the proper offset and length of the essence container in each partition
2497 static void mxf_compute_essence_containers(MXFContext *mxf)
2501 /* everything is already correct */
2502 if (mxf->op == OPAtom)
2505 for (x = 0; x < mxf->partitions_count; x++) {
2506 MXFPartition *p = &mxf->partitions[x];
2509 continue; /* BodySID == 0 -> no essence */
2511 if (x >= mxf->partitions_count - 1)
2512 break; /* FooterPartition - can't compute length (and we don't need to) */
2514 /* essence container spans to the next partition */
2515 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2517 if (p->essence_length < 0) {
2518 /* next ThisPartition < essence_offset */
2519 p->essence_length = 0;
2520 av_log(mxf->fc, AV_LOG_ERROR,
2521 "partition %i: bad ThisPartition = %"PRIX64"\n",
2522 x+1, mxf->partitions[x+1].this_partition);
2527 static int64_t round_to_kag(int64_t position, int kag_size)
2529 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2530 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2531 int64_t ret = (position / kag_size) * kag_size;
2532 return ret == position ? ret : ret + kag_size;
2535 static int is_pcm(enum AVCodecID codec_id)
2537 /* we only care about "normal" PCM codecs until we get samples */
2538 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2542 * Deal with the case where for some audio atoms EditUnitByteCount is
2543 * very small (2, 4..). In those cases we should read more than one
2544 * sample per call to mxf_read_packet().
2546 static void mxf_handle_small_eubc(AVFormatContext *s)
2548 MXFContext *mxf = s->priv_data;
2550 /* assuming non-OPAtom == frame wrapped
2551 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2552 if (mxf->op != OPAtom)
2555 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2556 if (s->nb_streams != 1 ||
2557 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2558 !is_pcm(s->streams[0]->codec->codec_id) ||
2559 mxf->nb_index_tables != 1 ||
2560 mxf->index_tables[0].nb_segments != 1 ||
2561 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2564 /* arbitrarily default to 48 kHz PAL audio frame size */
2565 /* TODO: We could compute this from the ratio between the audio
2566 * and video edit rates for 48 kHz NTSC we could use the
2567 * 1802-1802-1802-1802-1801 pattern. */
2568 mxf->edit_units_per_packet = 1920;
2572 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2574 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2576 AVFormatContext *s = mxf->fc;
2577 AVStream *st = NULL;
2578 MXFIndexTableSegment *segment = NULL;
2579 MXFPartition *p = NULL;
2580 int essence_partition_count = 0;
2583 if (mxf->op != OPAtom)
2586 /* TODO: support raw video without a index if they exist */
2587 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2590 /* check if file already has a IndexTableSegment */
2591 for (i = 0; i < mxf->metadata_sets_count; i++) {
2592 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2596 /* find the essence partition */
2597 for (i = 0; i < mxf->partitions_count; i++) {
2598 /* BodySID == 0 -> no essence */
2599 if (!mxf->partitions[i].body_sid)
2602 p = &mxf->partitions[i];
2603 essence_partition_count++;
2606 /* only handle files with a single essence partition */
2607 if (essence_partition_count != 1)
2610 if (!(segment = av_mallocz(sizeof(*segment))))
2611 return AVERROR(ENOMEM);
2613 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2614 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2619 segment->type = IndexTableSegment;
2620 /* stream will be treated as small EditUnitByteCount */
2621 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2622 segment->index_start_position = 0;
2623 segment->index_duration = s->streams[0]->duration;
2624 segment->index_sid = p->index_sid;
2625 segment->body_sid = p->body_sid;
2629 static void mxf_read_random_index_pack(AVFormatContext *s)
2631 MXFContext *mxf = s->priv_data;
2633 int64_t file_size, max_rip_length, min_rip_length;
2636 if (!s->pb->seekable)
2639 file_size = avio_size(s->pb);
2641 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2642 * The limit below assumes a file with nothing but partition packs and a RIP.
2643 * Before changing this, consider that a muxer may place each sample in its own partition.
2645 * 105 is the size of the smallest possible PartitionPack
2646 * 12 is the size of each RIP entry
2647 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2649 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2650 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2652 /* We're only interested in RIPs with at least two entries.. */
2653 min_rip_length = 16+1+24+4;
2655 /* See S377m section 11 */
2656 avio_seek(s->pb, file_size - 4, SEEK_SET);
2657 length = avio_rb32(s->pb);
2659 if (length < min_rip_length || length > max_rip_length)
2661 avio_seek(s->pb, file_size - length, SEEK_SET);
2662 if (klv_read_packet(&klv, s->pb) < 0 ||
2663 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2664 klv.length != length - 20)
2667 avio_skip(s->pb, klv.length - 12);
2668 mxf->footer_partition = avio_rb64(s->pb);
2671 if (mxf->run_in + mxf->footer_partition >= file_size) {
2672 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2673 mxf->footer_partition = 0;
2677 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2680 static int mxf_read_header(AVFormatContext *s)
2682 MXFContext *mxf = s->priv_data;
2684 int64_t essence_offset = 0;
2687 mxf->last_forward_tell = INT64_MAX;
2688 mxf->edit_units_per_packet = 1;
2690 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2691 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2692 return AVERROR_INVALIDDATA;
2694 avio_seek(s->pb, -14, SEEK_CUR);
2696 mxf->run_in = avio_tell(s->pb);
2698 mxf_read_random_index_pack(s);
2700 while (!avio_feof(s->pb)) {
2701 const MXFMetadataReadTableEntry *metadata;
2703 if (klv_read_packet(&klv, s->pb) < 0) {
2704 /* EOF - seek to previous partition or stop */
2705 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2711 PRINT_KEY(s, "read header", klv.key);
2712 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2713 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2714 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2715 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2716 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2718 if (!mxf->current_partition) {
2719 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2720 return AVERROR_INVALIDDATA;
2723 if (!mxf->current_partition->essence_offset) {
2724 /* for OP1a we compute essence_offset
2725 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2726 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2727 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2729 int64_t op1a_essence_offset =
2730 round_to_kag(mxf->current_partition->this_partition +
2731 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2732 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2733 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2735 if (mxf->op == OPAtom) {
2736 /* point essence_offset to the actual data
2737 * OPAtom has all the essence in one big KLV
2739 mxf->current_partition->essence_offset = avio_tell(s->pb);
2740 mxf->current_partition->essence_length = klv.length;
2742 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2743 mxf->current_partition->essence_offset = op1a_essence_offset;
2747 if (!essence_offset)
2748 essence_offset = klv.offset;
2750 /* seek to footer, previous partition or stop */
2751 if (mxf_parse_handle_essence(mxf) <= 0)
2754 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2755 /* next partition pack - keep going, seek to previous partition or stop */
2756 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2758 else if (mxf->parsing_backward)
2760 /* we're still parsing forward. proceed to parsing this partition pack */
2763 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2764 if (IS_KLV_KEY(klv.key, metadata->key)) {
2765 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2770 if (!metadata->read) {
2771 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2773 avio_skip(s->pb, klv.length);
2776 /* FIXME avoid seek */
2777 if (!essence_offset) {
2778 av_log(s, AV_LOG_ERROR, "no essence\n");
2779 ret = AVERROR_INVALIDDATA;
2782 avio_seek(s->pb, essence_offset, SEEK_SET);
2784 mxf_compute_essence_containers(mxf);
2786 /* we need to do this before computing the index tables
2787 * to be able to fill in zero IndexDurations with st->duration */
2788 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2791 mxf_handle_missing_index_segment(mxf);
2792 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2795 if (mxf->nb_index_tables > 1) {
2796 /* TODO: look up which IndexSID to use via EssenceContainerData */
2797 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2798 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2799 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2800 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2801 ret = AVERROR_INVALIDDATA;
2805 mxf_handle_small_eubc(s);
2815 * Sets mxf->current_edit_unit based on what offset we're currently at.
2816 * @return next_ofs if OK, <0 on error
2818 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2820 int64_t last_ofs = -1, next_ofs = -1;
2821 MXFIndexTable *t = &mxf->index_tables[0];
2823 /* this is called from the OP1a demuxing logic, which means there
2824 * may be no index tables */
2825 if (mxf->nb_index_tables <= 0)
2828 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2829 while (mxf->current_edit_unit >= 0) {
2830 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2833 if (next_ofs <= last_ofs) {
2834 /* large next_ofs didn't change or current_edit_unit wrapped
2835 * around this fixes the infinite loop on zzuf3.mxf */
2836 av_log(mxf->fc, AV_LOG_ERROR,
2837 "next_ofs didn't change. not deriving packet timestamps\n");
2841 if (next_ofs > current_offset)
2844 last_ofs = next_ofs;
2845 mxf->current_edit_unit++;
2848 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2849 if (mxf->current_edit_unit < 0)
2855 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2856 uint64_t *sample_count)
2858 int i, total = 0, size = 0;
2859 AVStream *st = mxf->fc->streams[stream_index];
2860 MXFTrack *track = st->priv_data;
2861 AVRational time_base = av_inv_q(track->edit_rate);
2862 AVRational sample_rate = av_inv_q(st->time_base);
2863 const MXFSamplesPerFrame *spf = NULL;
2865 if ((sample_rate.num / sample_rate.den) == 48000)
2866 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2868 int remainder = (sample_rate.num * time_base.num) %
2869 (time_base.den * sample_rate.den);
2870 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2871 av_mul_q(sample_rate, time_base)));
2873 av_log(mxf->fc, AV_LOG_WARNING,
2874 "seeking detected on stream #%d with time base (%d/%d) and "
2875 "sample rate (%d/%d), audio pts won't be accurate.\n",
2876 stream_index, time_base.num, time_base.den,
2877 sample_rate.num, sample_rate.den);
2881 while (spf->samples_per_frame[size]) {
2882 total += spf->samples_per_frame[size];
2888 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2889 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2890 *sample_count += spf->samples_per_frame[i];
2896 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2899 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2900 int64_t bits_per_sample = codec->bits_per_coded_sample;
2902 if (!bits_per_sample)
2903 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2905 pkt->pts = track->sample_count;
2907 if ( codec->channels <= 0
2908 || bits_per_sample <= 0
2909 || codec->channels * (int64_t)bits_per_sample < 8)
2910 return AVERROR(EINVAL);
2911 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2915 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2918 MXFContext *mxf = s->priv_data;
2921 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2922 PRINT_KEY(s, "read packet", klv.key);
2923 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2924 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2925 ret = mxf_decrypt_triplet(s, pkt, &klv);
2927 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2932 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2933 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2934 int index = mxf_get_stream_index(s, &klv);
2935 int64_t next_ofs, next_klv;
2938 AVCodecContext *codec;
2941 av_log(s, AV_LOG_ERROR,
2942 "error getting stream index %"PRIu32"\n",
2943 AV_RB32(klv.key + 12));
2947 st = s->streams[index];
2948 track = st->priv_data;
2950 if (s->streams[index]->discard == AVDISCARD_ALL)
2953 next_klv = avio_tell(s->pb) + klv.length;
2954 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2956 if (next_ofs >= 0 && next_klv > next_ofs) {
2957 /* if this check is hit then it's possible OPAtom was treated as OP1a
2958 * truncate the packet since it's probably very large (>2 GiB is common) */
2959 avpriv_request_sample(s,
2960 "OPAtom misinterpreted as OP1a? "
2961 "KLV for edit unit %i extending into "
2963 mxf->current_edit_unit);
2964 klv.length = next_ofs - avio_tell(s->pb);
2967 /* check for 8 channels AES3 element */
2968 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2969 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2972 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2976 ret = av_get_packet(s->pb, pkt, klv.length);
2980 pkt->stream_index = index;
2981 pkt->pos = klv.offset;
2985 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2986 /* mxf->current_edit_unit good - see if we have an
2987 * index table to derive timestamps from */
2988 MXFIndexTable *t = &mxf->index_tables[0];
2990 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2991 pkt->dts = mxf->current_edit_unit + t->first_dts;
2992 pkt->pts = t->ptses[mxf->current_edit_unit];
2993 } else if (track->intra_only) {
2994 /* intra-only -> PTS = EditUnit.
2995 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2996 pkt->pts = mxf->current_edit_unit;
2998 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2999 ret = mxf_set_audio_pts(mxf, codec, pkt);
3004 /* seek for truncated packets */
3005 avio_seek(s->pb, next_klv, SEEK_SET);
3010 avio_skip(s->pb, klv.length);
3012 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3015 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3017 MXFContext *mxf = s->priv_data;
3019 int64_t ret64, pos, next_pos;
3024 if (mxf->op != OPAtom)
3025 return mxf_read_packet_old(s, pkt);
3027 // If we have no streams then we basically are at EOF
3028 if (s->nb_streams < 1)
3031 /* OPAtom - clip wrapped demuxing */
3032 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3034 t = &mxf->index_tables[0];
3036 if (mxf->current_edit_unit >= st->duration)
3039 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3041 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3044 /* compute size by finding the next edit unit or the end of the essence container
3045 * not pretty, but it works */
3046 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3047 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3048 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3049 return AVERROR_INVALIDDATA;
3052 if ((size = next_pos - pos) <= 0) {
3053 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3054 return AVERROR_INVALIDDATA;
3057 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3060 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3063 pkt->stream_index = 0;
3065 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3066 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3067 pkt->dts = mxf->current_edit_unit + t->first_dts;
3068 pkt->pts = t->ptses[mxf->current_edit_unit];
3069 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3070 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3075 mxf->current_edit_unit += edit_units;
3080 static int mxf_read_close(AVFormatContext *s)
3082 MXFContext *mxf = s->priv_data;
3085 av_freep(&mxf->packages_refs);
3087 for (i = 0; i < s->nb_streams; i++)
3088 s->streams[i]->priv_data = NULL;
3090 for (i = 0; i < mxf->metadata_sets_count; i++) {
3091 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3093 av_freep(&mxf->partitions);
3094 av_freep(&mxf->metadata_sets);
3095 av_freep(&mxf->aesc);
3096 av_freep(&mxf->local_tags);
3098 if (mxf->index_tables) {
3099 for (i = 0; i < mxf->nb_index_tables; i++) {
3100 av_freep(&mxf->index_tables[i].segments);
3101 av_freep(&mxf->index_tables[i].ptses);
3102 av_freep(&mxf->index_tables[i].fake_index);
3103 av_freep(&mxf->index_tables[i].offsets);
3106 av_freep(&mxf->index_tables);
3111 static int mxf_probe(AVProbeData *p) {
3112 const uint8_t *bufp = p->buf;
3113 const uint8_t *end = p->buf + p->buf_size;
3115 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3118 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3119 end -= sizeof(mxf_header_partition_pack_key);
3121 for (; bufp < end;) {
3122 if (!((bufp[13] - 1) & 0xF2)){
3123 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3124 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3125 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3126 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3127 return AVPROBE_SCORE_MAX;
3136 /* rudimentary byte seek */
3137 /* XXX: use MXF Index */
3138 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3140 AVStream *st = s->streams[stream_index];
3142 MXFContext* mxf = s->priv_data;
3146 MXFTrack *source_track = st->priv_data;
3148 /* if audio then truncate sample_time to EditRate */
3149 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3150 sample_time = av_rescale_q(sample_time, st->time_base,
3151 av_inv_q(source_track->edit_rate));
3153 if (mxf->nb_index_tables <= 0) {
3155 return AVERROR_INVALIDDATA;
3156 if (sample_time < 0)
3158 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3160 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3164 ff_update_cur_dts(s, st, sample_time);
3165 mxf->current_edit_unit = sample_time;
3167 t = &mxf->index_tables[0];
3169 /* clamp above zero, else ff_index_search_timestamp() returns negative
3170 * this also means we allow seeking before the start */
3171 sample_time = FFMAX(sample_time, 0);
3173 if (t->fake_index) {
3174 /* behave as if we have a proper index */
3175 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3177 /* get the stored order index from the display order index */
3178 sample_time += t->offsets[sample_time];
3180 /* no IndexEntryArray (one or more CBR segments)
3181 * make sure we don't seek past the end */
3182 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3185 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3188 ff_update_cur_dts(s, st, sample_time);
3189 mxf->current_edit_unit = sample_time;
3190 avio_seek(s->pb, seekpos, SEEK_SET);
3193 // Update all tracks sample count
3194 for (i = 0; i < s->nb_streams; i++) {
3195 AVStream *cur_st = s->streams[i];
3196 MXFTrack *cur_track = cur_st->priv_data;
3197 uint64_t current_sample_count = 0;
3198 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3199 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3203 cur_track->sample_count = current_sample_count;
3209 AVInputFormat ff_mxf_demuxer = {
3211 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3212 .flags = AVFMT_SEEK_TO_PTS,
3213 .priv_data_size = sizeof(MXFContext),
3214 .read_probe = mxf_probe,
3215 .read_header = mxf_read_header,
3216 .read_packet = mxf_read_packet,
3217 .read_close = mxf_read_close,
3218 .read_seek = mxf_read_seek,