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/parseutils.h"
54 #include "libavutil/timecode.h"
76 OPSONYOpt, /* FATE sample, violates the spec in places */
79 typedef struct MXFPartition {
82 MXFPartitionType type;
83 uint64_t previous_partition;
86 int64_t this_partition;
87 int64_t essence_offset; ///< absolute offset of essence
88 int64_t essence_length;
90 int64_t header_byte_count;
91 int64_t index_byte_count;
93 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
96 typedef struct MXFCryptoContext {
98 enum MXFMetadataSetType type;
99 UID source_container_ul;
102 typedef struct MXFStructuralComponent {
104 enum MXFMetadataSetType type;
105 UID source_package_ul;
106 UID source_package_uid;
107 UID data_definition_ul;
109 int64_t start_position;
111 } MXFStructuralComponent;
113 typedef struct MXFSequence {
115 enum MXFMetadataSetType type;
116 UID data_definition_ul;
117 UID *structural_components_refs;
118 int structural_components_count;
123 typedef struct MXFTrack {
125 enum MXFMetadataSetType type;
128 struct AVRational rate;
130 } MXFTimecodeComponent;
134 enum MXFMetadataSetType type;
135 UID input_segment_ref;
136 } MXFPulldownComponent;
140 enum MXFMetadataSetType type;
141 UID *structural_components_refs;
142 int structural_components_count;
148 enum MXFMetadataSetType type;
155 enum MXFMetadataSetType type;
156 MXFSequence *sequence; /* mandatory, and only one */
160 uint8_t track_number[4];
161 AVRational edit_rate;
163 uint64_t sample_count;
164 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
169 typedef struct MXFDescriptor {
171 enum MXFMetadataSetType type;
172 UID essence_container_ul;
173 UID essence_codec_ul;
175 AVRational sample_rate;
176 AVRational aspect_ratio;
178 int height; /* Field height, not frame height */
179 int frame_layout; /* See MXFFrameLayout enum */
180 int video_line_map[2];
181 #define MXF_FIELD_DOMINANCE_DEFAULT 0
182 #define MXF_FIELD_DOMINANCE_FF 1 /* coded first, displayed first */
183 #define MXF_FIELD_DOMINANCE_FL 2 /* coded first, displayed last */
187 int64_t duration; /* ContainerDuration optional property */
188 unsigned int component_depth;
189 unsigned int horiz_subsampling;
190 unsigned int vert_subsampling;
191 UID *sub_descriptors_refs;
192 int sub_descriptors_count;
196 enum AVPixelFormat pix_fmt;
199 typedef struct MXFIndexTableSegment {
201 enum MXFMetadataSetType type;
202 int edit_unit_byte_count;
205 AVRational index_edit_rate;
206 uint64_t index_start_position;
207 uint64_t index_duration;
208 int8_t *temporal_offset_entries;
210 uint64_t *stream_offset_entries;
211 int nb_index_entries;
212 } MXFIndexTableSegment;
214 typedef struct MXFPackage {
216 enum MXFMetadataSetType type;
221 MXFDescriptor *descriptor; /* only one */
228 typedef struct MXFEssenceContainerData {
230 enum MXFMetadataSetType type;
235 } MXFEssenceContainerData;
237 typedef struct MXFMetadataSet {
239 enum MXFMetadataSetType type;
242 /* decoded index table */
243 typedef struct MXFIndexTable {
246 int nb_ptses; /* number of PTSes or total duration of index */
247 int64_t first_dts; /* DTS = EditUnit + first_dts */
248 int64_t *ptses; /* maps EditUnit -> PTS */
250 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
251 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
252 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
255 typedef struct MXFContext {
256 MXFPartition *partitions;
257 unsigned partitions_count;
261 UID *essence_container_data_refs;
262 int essence_container_data_count;
263 MXFMetadataSet **metadata_sets;
264 int metadata_sets_count;
268 int local_tags_count;
269 uint64_t footer_partition;
270 KLVPacket current_klv_data;
271 int current_klv_index;
273 MXFPartition *current_partition;
274 int parsing_backward;
275 int64_t last_forward_tell;
276 int last_forward_partition;
277 int current_edit_unit;
279 MXFIndexTable *index_tables;
280 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
283 enum MXFWrappingScheme {
288 /* NOTE: klv_offset is not set (-1) for local keys */
289 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
291 typedef struct MXFMetadataReadTableEntry {
293 MXFMetadataReadFunc *read;
295 enum MXFMetadataSetType type;
296 } MXFMetadataReadTableEntry;
298 static int mxf_read_close(AVFormatContext *s);
300 /* partial keys to match */
301 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
302 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
303 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
304 static const uint8_t mxf_canopus_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x0a,0x0e,0x0f,0x03,0x01 };
305 static const uint8_t mxf_system_item_key_cp[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
306 static const uint8_t mxf_system_item_key_gc[] = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x03,0x01,0x14 };
307 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
308 /* complete keys to match */
309 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 };
310 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
311 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
312 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 };
313 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
314 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
315 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
316 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 };
317 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 };
319 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
321 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
323 MXFIndexTableSegment *seg;
324 switch ((*ctx)->type) {
326 av_freep(&((MXFDescriptor *)*ctx)->extradata);
328 case MultipleDescriptor:
329 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
332 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
335 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
338 case MaterialPackage:
339 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
340 av_freep(&((MXFPackage *)*ctx)->name);
341 av_freep(&((MXFPackage *)*ctx)->comment_refs);
344 av_freep(&((MXFTaggedValue *)*ctx)->name);
345 av_freep(&((MXFTaggedValue *)*ctx)->value);
348 av_freep(&((MXFTrack *)*ctx)->name);
350 case IndexTableSegment:
351 seg = (MXFIndexTableSegment *)*ctx;
352 av_freep(&seg->temporal_offset_entries);
353 av_freep(&seg->flag_entries);
354 av_freep(&seg->stream_offset_entries);
362 static int64_t klv_decode_ber_length(AVIOContext *pb)
364 uint64_t size = avio_r8(pb);
365 if (size & 0x80) { /* long form */
366 int bytes_num = size & 0x7f;
367 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
369 return AVERROR_INVALIDDATA;
372 size = size << 8 | avio_r8(pb);
377 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
380 for (i = 0; i < size && !avio_feof(pb); i++) {
384 else if (b != key[i])
390 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
392 if (!mxf_read_sync(pb, mxf_klv_key, 4))
393 return AVERROR_INVALIDDATA;
394 klv->offset = avio_tell(pb) - 4;
395 memcpy(klv->key, mxf_klv_key, 4);
396 avio_read(pb, klv->key + 4, 12);
397 klv->length = klv_decode_ber_length(pb);
398 return klv->length == -1 ? -1 : 0;
401 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv, int body_sid)
405 for (i = 0; i < s->nb_streams; i++) {
406 MXFTrack *track = s->streams[i]->priv_data;
408 if (track && (!body_sid || !track->body_sid || track->body_sid == body_sid) && !memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
411 /* return 0 if only one stream, for OP Atom files with 0 as track number */
412 return s->nb_streams == 1 ? 0 : -1;
415 static int find_body_sid_by_offset(MXFContext *mxf, int64_t offset)
417 // we look for partition where the offset is placed
419 int64_t this_partition;
422 b = mxf->partitions_count;
426 this_partition = mxf->partitions[m].this_partition;
427 if (this_partition <= offset)
435 return mxf->partitions[a].body_sid;
438 /* XXX: use AVBitStreamFilter */
439 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
441 const uint8_t *buf_ptr, *end_ptr;
445 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
446 return AVERROR_INVALIDDATA;
447 length = av_get_packet(pb, pkt, length);
450 data_ptr = pkt->data;
451 end_ptr = pkt->data + length;
452 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
453 for (; end_ptr - buf_ptr >= st->codecpar->channels * 4; ) {
454 for (i = 0; i < st->codecpar->channels; i++) {
455 uint32_t sample = bytestream_get_le32(&buf_ptr);
456 if (st->codecpar->bits_per_coded_sample == 24)
457 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
459 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
461 buf_ptr += 32 - st->codecpar->channels*4; // always 8 channels stored SMPTE 331M
463 av_shrink_packet(pkt, data_ptr - pkt->data);
467 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
469 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
470 MXFContext *mxf = s->priv_data;
471 AVIOContext *pb = s->pb;
472 int64_t end = avio_tell(pb) + klv->length;
475 uint64_t plaintext_size;
481 if (!mxf->aesc && s->key && s->keylen == 16) {
482 mxf->aesc = av_aes_alloc();
484 return AVERROR(ENOMEM);
485 av_aes_init(mxf->aesc, s->key, 128, 1);
488 avio_skip(pb, klv_decode_ber_length(pb));
490 klv_decode_ber_length(pb);
491 plaintext_size = avio_rb64(pb);
493 klv_decode_ber_length(pb);
494 avio_read(pb, klv->key, 16);
495 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
496 return AVERROR_INVALIDDATA;
498 body_sid = find_body_sid_by_offset(mxf, klv->offset);
499 index = mxf_get_stream_index(s, klv, body_sid);
501 return AVERROR_INVALIDDATA;
503 klv_decode_ber_length(pb);
504 orig_size = avio_rb64(pb);
505 if (orig_size < plaintext_size)
506 return AVERROR_INVALIDDATA;
508 size = klv_decode_ber_length(pb);
509 if (size < 32 || size - 32 < orig_size)
510 return AVERROR_INVALIDDATA;
511 avio_read(pb, ivec, 16);
512 avio_read(pb, tmpbuf, 16);
514 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
515 if (memcmp(tmpbuf, checkv, 16))
516 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
518 size = av_get_packet(pb, pkt, size);
521 else if (size < plaintext_size)
522 return AVERROR_INVALIDDATA;
523 size -= plaintext_size;
525 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
526 &pkt->data[plaintext_size], size >> 4, ivec, 1);
527 av_shrink_packet(pkt, orig_size);
528 pkt->stream_index = index;
529 avio_skip(pb, end - avio_tell(pb));
533 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
535 MXFContext *mxf = arg;
536 int item_num = avio_rb32(pb);
537 int item_len = avio_rb32(pb);
539 if (item_len != 18) {
540 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
541 return AVERROR_PATCHWELCOME;
543 if (item_num > 65536 || item_num < 0) {
544 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
545 return AVERROR_INVALIDDATA;
548 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
549 av_free(mxf->local_tags);
550 mxf->local_tags_count = 0;
551 mxf->local_tags = av_calloc(item_num, item_len);
552 if (!mxf->local_tags)
553 return AVERROR(ENOMEM);
554 mxf->local_tags_count = item_num;
555 avio_read(pb, mxf->local_tags, item_num*item_len);
559 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
561 MXFContext *mxf = arg;
562 MXFPartition *partition, *tmp_part;
564 uint64_t footer_partition;
565 uint32_t nb_essence_containers;
567 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
569 return AVERROR(ENOMEM);
570 mxf->partitions = tmp_part;
572 if (mxf->parsing_backward) {
573 /* insert the new partition pack in the middle
574 * this makes the entries in mxf->partitions sorted by offset */
575 memmove(&mxf->partitions[mxf->last_forward_partition+1],
576 &mxf->partitions[mxf->last_forward_partition],
577 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
578 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
580 mxf->last_forward_partition++;
581 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
584 memset(partition, 0, sizeof(*partition));
585 mxf->partitions_count++;
586 partition->pack_length = avio_tell(pb) - klv_offset + size;
587 partition->pack_ofs = klv_offset;
591 partition->type = Header;
594 partition->type = BodyPartition;
597 partition->type = Footer;
600 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
601 return AVERROR_INVALIDDATA;
604 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
605 partition->closed = partition->type == Footer || !(uid[14] & 1);
606 partition->complete = uid[14] > 2;
608 partition->kag_size = avio_rb32(pb);
609 partition->this_partition = avio_rb64(pb);
610 partition->previous_partition = avio_rb64(pb);
611 footer_partition = avio_rb64(pb);
612 partition->header_byte_count = avio_rb64(pb);
613 partition->index_byte_count = avio_rb64(pb);
614 partition->index_sid = avio_rb32(pb);
616 partition->body_sid = avio_rb32(pb);
617 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
618 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
619 return AVERROR_INVALIDDATA;
621 nb_essence_containers = avio_rb32(pb);
623 if (partition->this_partition &&
624 partition->previous_partition == partition->this_partition) {
625 av_log(mxf->fc, AV_LOG_ERROR,
626 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
627 partition->previous_partition);
628 /* override with the actual previous partition offset */
629 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
631 mxf->partitions + mxf->last_forward_partition - 2;
632 partition->previous_partition = prev->this_partition;
634 /* if no previous body partition are found point to the header
636 if (partition->previous_partition == partition->this_partition)
637 partition->previous_partition = 0;
638 av_log(mxf->fc, AV_LOG_ERROR,
639 "Overriding PreviousPartition with %"PRIx64"\n",
640 partition->previous_partition);
643 /* some files don't have FooterPartition set in every partition */
644 if (footer_partition) {
645 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
646 av_log(mxf->fc, AV_LOG_ERROR,
647 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
648 mxf->footer_partition, footer_partition);
650 mxf->footer_partition = footer_partition;
654 av_log(mxf->fc, AV_LOG_TRACE,
655 "PartitionPack: ThisPartition = 0x%"PRIX64
656 ", PreviousPartition = 0x%"PRIX64", "
657 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
658 partition->this_partition,
659 partition->previous_partition, footer_partition,
660 partition->index_sid, partition->body_sid);
662 /* sanity check PreviousPartition if set */
663 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
664 if (partition->previous_partition &&
665 mxf->run_in + partition->previous_partition >= klv_offset) {
666 av_log(mxf->fc, AV_LOG_ERROR,
667 "PreviousPartition points to this partition or forward\n");
668 return AVERROR_INVALIDDATA;
671 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
672 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
673 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
674 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
675 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
676 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
677 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
678 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
679 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
680 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
681 else if (op[12] == 0x10) {
682 /* SMPTE 390m: "There shall be exactly one essence container"
683 * The following block deals with files that violate this, namely:
684 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
685 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
686 if (nb_essence_containers != 1) {
687 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
691 av_log(mxf->fc, AV_LOG_WARNING,
692 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
693 nb_essence_containers,
694 op == OP1a ? "OP1a" : "OPAtom");
700 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
704 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
705 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
706 partition->kag_size);
708 if (mxf->op == OPSONYOpt)
709 partition->kag_size = 512;
711 partition->kag_size = 1;
713 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
719 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
721 MXFMetadataSet **tmp;
723 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
725 return AVERROR(ENOMEM);
726 mxf->metadata_sets = tmp;
727 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
728 mxf->metadata_sets_count++;
732 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
734 MXFCryptoContext *cryptocontext = arg;
736 return AVERROR_INVALIDDATA;
737 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
738 avio_read(pb, cryptocontext->source_container_ul, 16);
742 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
744 *count = avio_rb32(pb);
745 *refs = av_calloc(*count, sizeof(UID));
748 return AVERROR(ENOMEM);
750 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
751 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
755 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
760 if (size < 0 || size > INT_MAX/2)
761 return AVERROR(EINVAL);
763 buf_size = size + size / 2 + 1;
764 *str = av_malloc(buf_size);
766 return AVERROR(ENOMEM);
769 ret = avio_get_str16be(pb, size, *str, buf_size);
771 ret = avio_get_str16le(pb, size, *str, buf_size);
781 #define READ_STR16(type, big_endian) \
782 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
784 return mxf_read_utf16_string(pb, size, str, big_endian); \
790 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
792 MXFContext *mxf = arg;
795 if (mxf->packages_refs)
796 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
797 av_free(mxf->packages_refs);
798 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
800 av_free(mxf->essence_container_data_refs);
801 return mxf_read_strong_ref_array(pb, &mxf->essence_container_data_refs, &mxf->essence_container_data_count);
806 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
808 MXFStructuralComponent *source_clip = arg;
811 source_clip->duration = avio_rb64(pb);
814 source_clip->start_position = avio_rb64(pb);
817 /* UMID, only get last 16 bytes */
818 avio_read(pb, source_clip->source_package_ul, 16);
819 avio_read(pb, source_clip->source_package_uid, 16);
822 source_clip->source_track_id = avio_rb32(pb);
828 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
830 MXFTimecodeComponent *mxf_timecode = arg;
833 mxf_timecode->start_frame = avio_rb64(pb);
836 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
839 mxf_timecode->drop_frame = avio_r8(pb);
845 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
847 MXFPulldownComponent *mxf_pulldown = arg;
850 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
856 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
858 MXFTrack *track = arg;
861 track->track_id = avio_rb32(pb);
864 avio_read(pb, track->track_number, 4);
867 mxf_read_utf16be_string(pb, size, &track->name);
870 track->edit_rate.num = avio_rb32(pb);
871 track->edit_rate.den = avio_rb32(pb);
874 avio_read(pb, track->sequence_ref, 16);
880 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
882 MXFSequence *sequence = arg;
885 sequence->duration = avio_rb64(pb);
888 avio_read(pb, sequence->data_definition_ul, 16);
891 sequence->origin = avio_r8(pb);
894 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
895 &sequence->structural_components_count);
900 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
902 MXFEssenceGroup *essence_group = arg;
905 essence_group->duration = avio_rb64(pb);
908 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
909 &essence_group->structural_components_count);
914 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
916 MXFPackage *package = arg;
919 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
920 &package->tracks_count);
923 avio_read(pb, package->package_ul, 16);
924 avio_read(pb, package->package_uid, 16);
927 avio_read(pb, package->descriptor_ref, 16);
930 return mxf_read_utf16be_string(pb, size, &package->name);
932 return mxf_read_strong_ref_array(pb, &package->comment_refs,
933 &package->comment_count);
938 static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
940 MXFEssenceContainerData *essence_data = arg;
943 /* linked package umid UMID */
944 avio_read(pb, essence_data->package_ul, 16);
945 avio_read(pb, essence_data->package_uid, 16);
948 essence_data->index_sid = avio_rb32(pb);
951 essence_data->body_sid = avio_rb32(pb);
957 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
961 segment->nb_index_entries = avio_rb32(pb);
963 length = avio_rb32(pb);
964 if(segment->nb_index_entries && length < 11)
965 return AVERROR_INVALIDDATA;
967 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
968 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
969 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
970 av_freep(&segment->temporal_offset_entries);
971 av_freep(&segment->flag_entries);
972 return AVERROR(ENOMEM);
975 for (i = 0; i < segment->nb_index_entries; i++) {
977 return AVERROR_INVALIDDATA;
978 segment->temporal_offset_entries[i] = avio_r8(pb);
979 avio_r8(pb); /* KeyFrameOffset */
980 segment->flag_entries[i] = avio_r8(pb);
981 segment->stream_offset_entries[i] = avio_rb64(pb);
982 avio_skip(pb, length - 11);
987 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
989 MXFIndexTableSegment *segment = arg;
992 segment->edit_unit_byte_count = avio_rb32(pb);
993 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
996 segment->index_sid = avio_rb32(pb);
997 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
1000 segment->body_sid = avio_rb32(pb);
1001 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
1004 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
1005 return mxf_read_index_entry_array(pb, segment);
1007 segment->index_edit_rate.num = avio_rb32(pb);
1008 segment->index_edit_rate.den = avio_rb32(pb);
1009 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
1010 segment->index_edit_rate.den);
1013 segment->index_start_position = avio_rb64(pb);
1014 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
1017 segment->index_duration = avio_rb64(pb);
1018 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
1024 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
1026 int code, value, ofs = 0;
1027 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
1031 value = avio_r8(pb);
1032 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
1035 layout[ofs++] = code;
1036 layout[ofs++] = value;
1038 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
1039 } while (code != 0); /* SMPTE 377M E.2.46 */
1041 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
1044 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1046 MXFDescriptor *descriptor = arg;
1047 int entry_count, entry_size;
1051 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
1052 &descriptor->sub_descriptors_count);
1053 case 0x3002: /* ContainerDuration */
1054 descriptor->duration = avio_rb64(pb);
1057 avio_read(pb, descriptor->essence_container_ul, 16);
1060 avio_read(pb, descriptor->codec_ul, 16);
1063 descriptor->linked_track_id = avio_rb32(pb);
1065 case 0x3201: /* PictureEssenceCoding */
1066 avio_read(pb, descriptor->essence_codec_ul, 16);
1069 descriptor->width = avio_rb32(pb);
1072 descriptor->height = avio_rb32(pb);
1075 descriptor->frame_layout = avio_r8(pb);
1078 entry_count = avio_rb32(pb);
1079 entry_size = avio_rb32(pb);
1080 if (entry_size == 4) {
1081 if (entry_count > 0)
1082 descriptor->video_line_map[0] = avio_rb32(pb);
1084 descriptor->video_line_map[0] = 0;
1085 if (entry_count > 1)
1086 descriptor->video_line_map[1] = avio_rb32(pb);
1088 descriptor->video_line_map[1] = 0;
1090 av_log(NULL, AV_LOG_WARNING, "VideoLineMap element size %d currently not supported\n", entry_size);
1093 descriptor->aspect_ratio.num = avio_rb32(pb);
1094 descriptor->aspect_ratio.den = avio_rb32(pb);
1097 descriptor->field_dominance = avio_r8(pb);
1100 descriptor->component_depth = avio_rb32(pb);
1103 descriptor->horiz_subsampling = avio_rb32(pb);
1106 descriptor->vert_subsampling = avio_rb32(pb);
1109 descriptor->sample_rate.num = avio_rb32(pb);
1110 descriptor->sample_rate.den = avio_rb32(pb);
1112 case 0x3D06: /* SoundEssenceCompression */
1113 avio_read(pb, descriptor->essence_codec_ul, 16);
1116 descriptor->channels = avio_rb32(pb);
1119 descriptor->bits_per_sample = avio_rb32(pb);
1122 mxf_read_pixel_layout(pb, descriptor);
1125 /* Private uid used by SONY C0023S01.mxf */
1126 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1127 if (descriptor->extradata)
1128 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1129 av_free(descriptor->extradata);
1130 descriptor->extradata_size = 0;
1131 descriptor->extradata = av_malloc(size);
1132 if (!descriptor->extradata)
1133 return AVERROR(ENOMEM);
1134 descriptor->extradata_size = size;
1135 avio_read(pb, descriptor->extradata, size);
1137 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1138 uint32_t rsiz = avio_rb16(pb);
1139 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1140 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1141 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1148 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1150 MXFTaggedValue *tagged_value = arg;
1156 avio_read(pb, key, 17);
1157 /* TODO: handle other types of of indirect values */
1158 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1159 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1160 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1161 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1166 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1168 MXFTaggedValue *tagged_value = arg;
1171 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1173 return mxf_read_indirect_value(tagged_value, pb, size);
1179 * Match an uid independently of the version byte and up to len common bytes
1182 static int mxf_match_uid(const UID key, const UID uid, int len)
1185 for (i = 0; i < len; i++) {
1186 if (i != 7 && key[i] != uid[i])
1192 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1194 while (uls->uid[0]) {
1195 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1202 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1208 for (i = 0; i < mxf->metadata_sets_count; i++) {
1209 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1210 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1211 return mxf->metadata_sets[i];
1217 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1218 // video essence container uls
1219 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1220 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x10,0x60,0x01 }, 14, AV_CODEC_ID_H264 }, /* H.264 frame wrapped */
1221 { { 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 */
1222 { { 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 */
1223 { { 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 */
1224 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1225 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* uncompressed picture */
1226 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x01,0x01 }, 15, AV_CODEC_ID_HQ_HQA },
1227 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x02,0x01 }, 15, AV_CODEC_ID_HQX },
1228 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1229 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1232 /* EC ULs for intra-only formats */
1233 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1234 { { 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 */
1235 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1238 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1239 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1240 { { 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 */
1241 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG 2000 code stream */
1242 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1245 /* actual coded width for AVC-Intra to allow selecting correct SPS/PPS */
1246 static const MXFCodecUL mxf_intra_only_picture_coded_width[] = {
1247 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x01 }, 16, 1440 },
1248 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x02 }, 16, 1440 },
1249 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x03 }, 16, 1440 },
1250 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x04 }, 16, 1440 },
1251 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 0 },
1254 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1255 // sound essence container uls
1256 { { 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 */
1257 { { 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 */
1258 { { 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 */
1259 { { 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 */
1260 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG-2 AAC ADTS (legacy) */
1261 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1264 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1265 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1266 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1269 static const char * const mxf_data_essence_descriptor[] = {
1270 "vbi_vanc_smpte_436M",
1273 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1275 int i, j, nb_segments = 0;
1276 MXFIndexTableSegment **unsorted_segments;
1277 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1279 /* count number of segments, allocate arrays and copy unsorted segments */
1280 for (i = 0; i < mxf->metadata_sets_count; i++)
1281 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1285 return AVERROR_INVALIDDATA;
1287 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1288 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1289 av_freep(sorted_segments);
1290 av_free(unsorted_segments);
1291 return AVERROR(ENOMEM);
1294 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1295 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1296 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1298 *nb_sorted_segments = 0;
1300 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1301 for (i = 0; i < nb_segments; i++) {
1302 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1303 uint64_t best_index_duration = 0;
1305 for (j = 0; j < nb_segments; j++) {
1306 MXFIndexTableSegment *s = unsorted_segments[j];
1308 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1309 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1310 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1312 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1313 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1314 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1316 best_body_sid = s->body_sid;
1317 best_index_sid = s->index_sid;
1318 best_index_start = s->index_start_position;
1319 best_index_duration = s->index_duration;
1323 /* no suitable entry found -> we're done */
1327 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1328 last_body_sid = best_body_sid;
1329 last_index_sid = best_index_sid;
1330 last_index_start = best_index_start;
1333 av_free(unsorted_segments);
1339 * Computes the absolute file offset of the given essence container offset
1341 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1344 int64_t offset_in = offset; /* for logging */
1346 for (x = 0; x < mxf->partitions_count; x++) {
1347 MXFPartition *p = &mxf->partitions[x];
1349 if (p->body_sid != body_sid)
1352 if (offset < p->essence_length || !p->essence_length) {
1353 *offset_out = p->essence_offset + offset;
1357 offset -= p->essence_length;
1360 av_log(mxf->fc, AV_LOG_ERROR,
1361 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1362 offset_in, body_sid);
1364 return AVERROR_INVALIDDATA;
1368 * Returns the end position of the essence container with given BodySID, or zero if unknown
1370 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1375 for (x = 0; x < mxf->partitions_count; x++) {
1376 MXFPartition *p = &mxf->partitions[x];
1378 if (p->body_sid != body_sid)
1381 if (!p->essence_length)
1384 ret = p->essence_offset + p->essence_length;
1390 /* EditUnit -> absolute offset */
1391 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)
1394 int64_t offset_temp = 0;
1396 for (i = 0; i < index_table->nb_segments; i++) {
1397 MXFIndexTableSegment *s = index_table->segments[i];
1399 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1401 if (edit_unit < s->index_start_position + s->index_duration) {
1402 int64_t index = edit_unit - s->index_start_position;
1404 if (s->edit_unit_byte_count)
1405 offset_temp += s->edit_unit_byte_count * index;
1406 else if (s->nb_index_entries) {
1407 if (s->nb_index_entries == 2 * s->index_duration + 1)
1408 index *= 2; /* Avid index */
1410 if (index < 0 || index >= s->nb_index_entries) {
1411 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1412 index_table->index_sid, s->index_start_position);
1413 return AVERROR_INVALIDDATA;
1416 offset_temp = s->stream_offset_entries[index];
1418 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1419 index_table->index_sid, s->index_start_position);
1420 return AVERROR_INVALIDDATA;
1424 *edit_unit_out = edit_unit;
1426 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1428 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1429 offset_temp += s->edit_unit_byte_count * s->index_duration;
1434 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);
1436 return AVERROR_INVALIDDATA;
1439 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1442 int8_t max_temporal_offset = -128;
1445 /* first compute how many entries we have */
1446 for (i = 0; i < index_table->nb_segments; i++) {
1447 MXFIndexTableSegment *s = index_table->segments[i];
1449 if (!s->nb_index_entries) {
1450 index_table->nb_ptses = 0;
1451 return 0; /* no TemporalOffsets */
1454 index_table->nb_ptses += s->index_duration;
1457 /* paranoid check */
1458 if (index_table->nb_ptses <= 0)
1461 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1462 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1463 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1464 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1465 av_freep(&index_table->ptses);
1466 av_freep(&index_table->fake_index);
1467 av_freep(&index_table->offsets);
1468 return AVERROR(ENOMEM);
1471 /* we may have a few bad TemporalOffsets
1472 * make sure the corresponding PTSes don't have the bogus value 0 */
1473 for (x = 0; x < index_table->nb_ptses; x++)
1474 index_table->ptses[x] = AV_NOPTS_VALUE;
1488 * We want to transform it into this:
1499 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1500 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1501 * The latter makes DTS <= PTS.
1503 for (i = x = 0; i < index_table->nb_segments; i++) {
1504 MXFIndexTableSegment *s = index_table->segments[i];
1505 int index_delta = 1;
1506 int n = s->nb_index_entries;
1508 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1509 index_delta = 2; /* Avid index */
1510 /* ignore the last entry - it's the size of the essence container */
1514 for (j = 0; j < n; j += index_delta, x++) {
1515 int offset = s->temporal_offset_entries[j] / index_delta;
1516 int index = x + offset;
1518 if (x >= index_table->nb_ptses) {
1519 av_log(mxf->fc, AV_LOG_ERROR,
1520 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1521 s->nb_index_entries, s->index_duration);
1525 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1527 if (index < 0 || index >= index_table->nb_ptses) {
1528 av_log(mxf->fc, AV_LOG_ERROR,
1529 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1534 index_table->offsets[x] = offset;
1535 index_table->ptses[index] = x;
1536 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1540 /* calculate the fake index table in display order */
1541 for (x = 0; x < index_table->nb_ptses; x++) {
1542 index_table->fake_index[x].timestamp = x;
1543 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1544 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1548 index_table->first_dts = -max_temporal_offset;
1554 * Sorts and collects index table segments into index tables.
1555 * Also computes PTSes if possible.
1557 static int mxf_compute_index_tables(MXFContext *mxf)
1559 int i, j, k, ret, nb_sorted_segments;
1560 MXFIndexTableSegment **sorted_segments = NULL;
1561 AVStream *st = NULL;
1563 for (i = 0; i < mxf->fc->nb_streams; i++) {
1564 if (mxf->fc->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1566 st = mxf->fc->streams[i];
1570 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1571 nb_sorted_segments <= 0) {
1572 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1576 /* sanity check and count unique BodySIDs/IndexSIDs */
1577 for (i = 0; i < nb_sorted_segments; i++) {
1578 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1579 mxf->nb_index_tables++;
1580 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1581 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1582 ret = AVERROR_INVALIDDATA;
1583 goto finish_decoding_index;
1587 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1588 sizeof(*mxf->index_tables));
1589 if (!mxf->index_tables) {
1590 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1591 ret = AVERROR(ENOMEM);
1592 goto finish_decoding_index;
1595 /* distribute sorted segments to index tables */
1596 for (i = j = 0; i < nb_sorted_segments; i++) {
1597 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1602 mxf->index_tables[j].nb_segments++;
1605 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1606 MXFIndexTable *t = &mxf->index_tables[j];
1608 t->segments = av_mallocz_array(t->nb_segments,
1609 sizeof(*t->segments));
1612 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1613 " pointer array\n");
1614 ret = AVERROR(ENOMEM);
1615 goto finish_decoding_index;
1618 if (sorted_segments[i]->index_start_position)
1619 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1620 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1622 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1623 t->index_sid = sorted_segments[i]->index_sid;
1624 t->body_sid = sorted_segments[i]->body_sid;
1626 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1627 goto finish_decoding_index;
1629 /* fix zero IndexDurations */
1630 for (k = 0; k < t->nb_segments; k++) {
1631 if (t->segments[k]->index_duration)
1634 if (t->nb_segments > 1)
1635 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1639 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1643 /* assume the first stream's duration is reasonable
1644 * leave index_duration = 0 on further segments in case we have any (unlikely)
1646 t->segments[k]->index_duration = st->duration;
1652 finish_decoding_index:
1653 av_free(sorted_segments);
1657 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1659 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1660 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1661 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1662 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1665 static int mxf_uid_to_str(UID uid, char **str)
1669 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1671 return AVERROR(ENOMEM);
1672 for (i = 0; i < sizeof(UID); i++) {
1673 snprintf(p, 2 + 1, "%.2x", uid[i]);
1675 if (i == 3 || i == 5 || i == 7 || i == 9) {
1676 snprintf(p, 1 + 1, "-");
1683 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1687 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1689 return AVERROR(ENOMEM);
1690 snprintf(p, 2 + 1, "0x");
1692 for (i = 0; i < sizeof(UID); i++) {
1693 snprintf(p, 2 + 1, "%.2X", ul[i]);
1697 for (i = 0; i < sizeof(UID); i++) {
1698 snprintf(p, 2 + 1, "%.2X", uid[i]);
1704 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1710 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1712 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1716 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1718 char buf[AV_TIMECODE_STR_SIZE];
1719 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1724 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1726 MXFStructuralComponent *component = NULL;
1727 MXFPulldownComponent *pulldown = NULL;
1729 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1733 switch (component->type) {
1734 case TimecodeComponent:
1735 return (MXFTimecodeComponent*)component;
1736 case PulldownComponent: /* timcode component may be located on a pulldown component */
1737 pulldown = (MXFPulldownComponent*)component;
1738 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1745 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_ul, UID package_uid)
1747 MXFPackage *package = NULL;
1750 for (i = 0; i < mxf->packages_count; i++) {
1751 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1755 if (!memcmp(package->package_ul, package_ul, 16) && !memcmp(package->package_uid, package_uid, 16))
1761 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1763 MXFDescriptor *sub_descriptor = NULL;
1769 if (descriptor->type == MultipleDescriptor) {
1770 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1771 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1773 if (!sub_descriptor) {
1774 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1777 if (sub_descriptor->linked_track_id == track_id) {
1778 return sub_descriptor;
1781 } else if (descriptor->type == Descriptor)
1787 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1789 MXFStructuralComponent *component = NULL;
1790 MXFPackage *package = NULL;
1791 MXFDescriptor *descriptor = NULL;
1794 if (!essence_group || !essence_group->structural_components_count)
1797 /* essence groups contains multiple representations of the same media,
1798 this return the first components with a valid Descriptor typically index 0 */
1799 for (i =0; i < essence_group->structural_components_count; i++){
1800 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1804 if (!(package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid)))
1807 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1814 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1816 MXFStructuralComponent *component = NULL;
1818 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1821 switch (component->type) {
1825 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1832 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1834 MXFTaggedValue *tag;
1838 for (i = 0; i < package->comment_count; i++) {
1839 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1840 if (!tag || !tag->name || !tag->value)
1843 size = strlen(tag->name) + 8 + 1;
1844 key = av_mallocz(size);
1846 return AVERROR(ENOMEM);
1848 snprintf(key, size, "comment_%s", tag->name);
1849 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1854 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1856 MXFPackage *physical_package = NULL;
1857 MXFTrack *physical_track = NULL;
1858 MXFStructuralComponent *sourceclip = NULL;
1859 MXFTimecodeComponent *mxf_tc = NULL;
1863 int64_t start_position;
1865 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1866 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1870 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_ul, sourceclip->source_package_uid)))
1873 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1875 /* the name of physical source package is name of the reel or tape */
1876 if (physical_package->name && physical_package->name[0])
1877 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1879 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1880 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1882 for (j = 0; j < physical_package->tracks_count; j++) {
1883 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1884 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1888 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1889 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1893 if (physical_track->edit_rate.num <= 0 ||
1894 physical_track->edit_rate.den <= 0) {
1895 av_log(mxf->fc, AV_LOG_WARNING,
1896 "Invalid edit rate (%d/%d) found on structural"
1897 " component #%d, defaulting to 25/1\n",
1898 physical_track->edit_rate.num,
1899 physical_track->edit_rate.den, i);
1900 physical_track->edit_rate = (AVRational){25, 1};
1903 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1904 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1907 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1908 /* scale sourceclip start_position to match physical track edit rate */
1909 start_position = av_rescale_q(sourceclip->start_position,
1910 physical_track->edit_rate,
1911 source_track->edit_rate);
1913 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1914 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1924 static int mxf_add_metadata_stream(MXFContext *mxf, MXFTrack *track)
1926 MXFStructuralComponent *component = NULL;
1927 const MXFCodecUL *codec_ul = NULL;
1928 MXFPackage tmp_package;
1932 for (j = 0; j < track->sequence->structural_components_count; j++) {
1933 component = mxf_resolve_sourceclip(mxf, &track->sequence->structural_components_refs[j]);
1941 st = avformat_new_stream(mxf->fc, NULL);
1943 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate metadata stream\n");
1944 return AVERROR(ENOMEM);
1947 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
1948 st->codecpar->codec_id = AV_CODEC_ID_NONE;
1949 st->id = track->track_id;
1951 memcpy(&tmp_package.package_ul, component->source_package_ul, 16);
1952 memcpy(&tmp_package.package_uid, component->source_package_uid, 16);
1953 mxf_add_umid_metadata(&st->metadata, "file_package_umid", &tmp_package);
1954 if (track->name && track->name[0])
1955 av_dict_set(&st->metadata, "track_name", track->name, 0);
1957 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &track->sequence->data_definition_ul);
1958 av_dict_set(&st->metadata, "data_type", av_get_media_type_string(codec_ul->id), 0);
1962 static int mxf_parse_structural_metadata(MXFContext *mxf)
1964 MXFPackage *material_package = NULL;
1967 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1968 /* TODO: handle multiple material packages (OP3x) */
1969 for (i = 0; i < mxf->packages_count; i++) {
1970 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1971 if (material_package) break;
1973 if (!material_package) {
1974 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1975 return AVERROR_INVALIDDATA;
1978 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1979 if (material_package->name && material_package->name[0])
1980 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1981 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1983 for (i = 0; i < material_package->tracks_count; i++) {
1984 MXFPackage *source_package = NULL;
1985 MXFTrack *material_track = NULL;
1986 MXFTrack *source_track = NULL;
1987 MXFTrack *temp_track = NULL;
1988 MXFDescriptor *descriptor = NULL;
1989 MXFStructuralComponent *component = NULL;
1990 MXFTimecodeComponent *mxf_tc = NULL;
1991 UID *essence_container_ul = NULL;
1992 const MXFCodecUL *codec_ul = NULL;
1993 const MXFCodecUL *container_ul = NULL;
1994 const MXFCodecUL *pix_fmt_ul = NULL;
1999 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
2000 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
2004 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
2005 mxf_tc = (MXFTimecodeComponent*)component;
2006 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2007 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2008 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2012 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
2013 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
2017 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2018 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
2022 mxf_tc = (MXFTimecodeComponent*)component;
2023 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2024 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2025 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2030 /* TODO: handle multiple source clips, only finds first valid source clip */
2031 if(material_track->sequence->structural_components_count > 1)
2032 av_log(mxf->fc, AV_LOG_WARNING, "material track %d: has %d components\n",
2033 material_track->track_id, material_track->sequence->structural_components_count);
2035 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2036 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
2040 source_package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid);
2041 if (!source_package) {
2042 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
2045 for (k = 0; k < source_package->tracks_count; k++) {
2046 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
2047 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2048 ret = AVERROR_INVALIDDATA;
2051 if (temp_track->track_id == component->source_track_id) {
2052 source_track = temp_track;
2056 if (!source_track) {
2057 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
2061 for (k = 0; k < mxf->essence_container_data_count; k++) {
2062 MXFEssenceContainerData *essence_data;
2064 if (!(essence_data = mxf_resolve_strong_ref(mxf, &mxf->essence_container_data_refs[k], EssenceContainerData))) {
2065 av_log(mxf, AV_LOG_TRACE, "could not resolve essence container data strong ref\n");
2068 if (!memcmp(component->source_package_ul, essence_data->package_ul, sizeof(UID)) && !memcmp(component->source_package_uid, essence_data->package_uid, sizeof(UID))) {
2069 source_track->body_sid = essence_data->body_sid;
2070 source_track->index_sid = essence_data->index_sid;
2075 if(source_track && component)
2078 if (!source_track || !component || !source_package) {
2079 if((ret = mxf_add_metadata_stream(mxf, material_track)))
2084 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
2085 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2086 ret = AVERROR_INVALIDDATA;
2090 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
2091 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
2092 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
2093 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
2097 st = avformat_new_stream(mxf->fc, NULL);
2099 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
2100 ret = AVERROR(ENOMEM);
2103 st->id = material_track->track_id;
2104 st->priv_data = source_track;
2106 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
2107 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
2109 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
2110 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
2111 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
2112 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
2114 source_track->original_duration = st->duration = component->duration;
2116 if (st->duration == -1)
2117 st->duration = AV_NOPTS_VALUE;
2118 st->start_time = component->start_position;
2119 if (material_track->edit_rate.num <= 0 ||
2120 material_track->edit_rate.den <= 0) {
2121 av_log(mxf->fc, AV_LOG_WARNING,
2122 "Invalid edit rate (%d/%d) found on stream #%d, "
2123 "defaulting to 25/1\n",
2124 material_track->edit_rate.num,
2125 material_track->edit_rate.den, st->index);
2126 material_track->edit_rate = (AVRational){25, 1};
2128 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
2130 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
2131 * the former is accessible via st->priv_data */
2132 source_track->edit_rate = material_track->edit_rate;
2134 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
2135 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
2136 st->codecpar->codec_type = codec_ul->id;
2139 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
2142 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
2143 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
2144 essence_container_ul = &descriptor->essence_container_ul;
2145 /* HACK: replacing the original key with mxf_encrypted_essence_container
2146 * is not allowed according to s429-6, try to find correct information anyway */
2147 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
2148 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
2149 for (k = 0; k < mxf->metadata_sets_count; k++) {
2150 MXFMetadataSet *metadata = mxf->metadata_sets[k];
2151 if (metadata->type == CryptoContext) {
2152 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
2158 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
2159 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
2160 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2161 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
2162 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
2163 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2166 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
2167 avcodec_get_name(st->codecpar->codec_id));
2168 for (k = 0; k < 16; k++) {
2169 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
2170 descriptor->essence_codec_ul[k]);
2171 if (!(k+1 & 19) || k == 5)
2172 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
2174 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2176 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2177 if (source_package->name && source_package->name[0])
2178 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2179 if (material_track->name && material_track->name[0])
2180 av_dict_set(&st->metadata, "track_name", material_track->name, 0);
2182 mxf_parse_physical_source_package(mxf, source_track, st);
2184 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2185 source_track->intra_only = mxf_is_intra_only(descriptor);
2186 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2187 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2188 st->codecpar->codec_id = container_ul->id;
2189 st->codecpar->width = descriptor->width;
2190 st->codecpar->height = descriptor->height; /* Field height, not frame height */
2191 switch (descriptor->frame_layout) {
2193 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2196 /* Every other line is stored and needs to be duplicated. */
2197 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2198 break; /* The correct thing to do here is fall through, but by breaking we might be
2199 able to decode some streams at half the vertical resolution, rather than not al all.
2200 It's also for compatibility with the old behavior. */
2203 case SegmentedFrame:
2204 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2205 case SeparateFields:
2206 av_log(mxf->fc, AV_LOG_DEBUG, "video_line_map: (%d, %d), field_dominance: %d\n",
2207 descriptor->video_line_map[0], descriptor->video_line_map[1],
2208 descriptor->field_dominance);
2209 if ((descriptor->video_line_map[0] > 0) && (descriptor->video_line_map[1] > 0)) {
2210 /* Detect coded field order from VideoLineMap:
2211 * (even, even) => bottom field coded first
2212 * (even, odd) => top field coded first
2213 * (odd, even) => top field coded first
2214 * (odd, odd) => bottom field coded first
2216 if ((descriptor->video_line_map[0] + descriptor->video_line_map[1]) % 2) {
2217 switch (descriptor->field_dominance) {
2218 case MXF_FIELD_DOMINANCE_DEFAULT:
2219 case MXF_FIELD_DOMINANCE_FF:
2220 st->codecpar->field_order = AV_FIELD_TT;
2222 case MXF_FIELD_DOMINANCE_FL:
2223 st->codecpar->field_order = AV_FIELD_TB;
2226 avpriv_request_sample(mxf->fc,
2227 "Field dominance %d support",
2228 descriptor->field_dominance);
2231 switch (descriptor->field_dominance) {
2232 case MXF_FIELD_DOMINANCE_DEFAULT:
2233 case MXF_FIELD_DOMINANCE_FF:
2234 st->codecpar->field_order = AV_FIELD_BB;
2236 case MXF_FIELD_DOMINANCE_FL:
2237 st->codecpar->field_order = AV_FIELD_BT;
2240 avpriv_request_sample(mxf->fc,
2241 "Field dominance %d support",
2242 descriptor->field_dominance);
2246 /* Turn field height into frame height. */
2247 st->codecpar->height *= 2;
2250 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2252 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
2253 st->codecpar->format = descriptor->pix_fmt;
2254 if (st->codecpar->format == AV_PIX_FMT_NONE) {
2255 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2256 &descriptor->essence_codec_ul);
2257 st->codecpar->format = (enum AVPixelFormat)pix_fmt_ul->id;
2258 if (st->codecpar->format== AV_PIX_FMT_NONE) {
2259 st->codecpar->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2260 &descriptor->essence_codec_ul)->id;
2261 if (!st->codecpar->codec_tag) {
2262 /* support files created before RP224v10 by defaulting to UYVY422
2263 if subsampling is 4:2:2 and component depth is 8-bit */
2264 if (descriptor->horiz_subsampling == 2 &&
2265 descriptor->vert_subsampling == 1 &&
2266 descriptor->component_depth == 8) {
2267 st->codecpar->format = AV_PIX_FMT_UYVY422;
2273 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2274 if (material_track->sequence->origin) {
2275 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2277 if (source_track->sequence->origin) {
2278 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2280 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2281 st->display_aspect_ratio = descriptor->aspect_ratio;
2282 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
2283 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2284 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2285 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || (st->codecpar->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
2286 st->codecpar->codec_id = (enum AVCodecID)container_ul->id;
2287 st->codecpar->channels = descriptor->channels;
2288 st->codecpar->bits_per_coded_sample = descriptor->bits_per_sample;
2290 if (descriptor->sample_rate.den > 0) {
2291 st->codecpar->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2292 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2294 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2295 "found for stream #%d, time base forced to 1/48000\n",
2296 descriptor->sample_rate.num, descriptor->sample_rate.den,
2298 avpriv_set_pts_info(st, 64, 1, 48000);
2301 /* if duration is set, rescale it from EditRate to SampleRate */
2302 if (st->duration != AV_NOPTS_VALUE)
2303 st->duration = av_rescale_q(st->duration,
2304 av_inv_q(material_track->edit_rate),
2307 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2308 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
2309 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2310 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
2311 else if (descriptor->bits_per_sample == 32)
2312 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
2313 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) {
2314 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2315 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24BE;
2316 else if (descriptor->bits_per_sample == 32)
2317 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
2318 } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
2319 st->need_parsing = AVSTREAM_PARSE_FULL;
2321 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
2322 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2323 essence_container_ul)->id;
2324 if (codec_id >= 0 &&
2325 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2326 av_dict_set(&st->metadata, "data_type",
2327 mxf_data_essence_descriptor[codec_id], 0);
2330 if (descriptor->extradata) {
2331 if (!ff_alloc_extradata(st->codecpar, descriptor->extradata_size)) {
2332 memcpy(st->codecpar->extradata, descriptor->extradata, descriptor->extradata_size);
2334 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2335 int coded_width = mxf_get_codec_ul(mxf_intra_only_picture_coded_width,
2336 &descriptor->essence_codec_ul)->id;
2338 st->codecpar->width = coded_width;
2339 ret = ff_generate_avci_extradata(st);
2343 if (st->codecpar->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2344 /* TODO: decode timestamps */
2345 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2354 static int64_t mxf_timestamp_to_int64(uint64_t timestamp)
2356 struct tm time = { 0 };
2357 time.tm_year = (timestamp >> 48) - 1900;
2358 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2359 time.tm_mday = (timestamp >> 32 & 0xFF);
2360 time.tm_hour = (timestamp >> 24 & 0xFF);
2361 time.tm_min = (timestamp >> 16 & 0xFF);
2362 time.tm_sec = (timestamp >> 8 & 0xFF);
2364 /* msvcrt versions of strftime calls the invalid parameter handler
2365 * (aborting the process if one isn't set) if the parameters are out
2367 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2368 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2369 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2370 time.tm_min = av_clip(time.tm_min, 0, 59);
2371 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2373 return (int64_t)av_timegm(&time) * 1000000;
2376 #define SET_STR_METADATA(pb, name, str) do { \
2377 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2379 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2382 #define SET_UID_METADATA(pb, name, var, str) do { \
2383 avio_read(pb, var, 16); \
2384 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2386 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2389 #define SET_TS_METADATA(pb, name, var, str) do { \
2390 var = avio_rb64(pb); \
2391 if ((ret = avpriv_dict_set_timestamp(&s->metadata, name, mxf_timestamp_to_int64(var)) < 0)) \
2395 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2397 MXFContext *mxf = arg;
2398 AVFormatContext *s = mxf->fc;
2405 SET_STR_METADATA(pb, "company_name", str);
2408 SET_STR_METADATA(pb, "product_name", str);
2411 SET_STR_METADATA(pb, "product_version", str);
2414 SET_UID_METADATA(pb, "product_uid", uid, str);
2417 SET_TS_METADATA(pb, "modification_date", ts, str);
2420 SET_STR_METADATA(pb, "application_platform", str);
2423 SET_UID_METADATA(pb, "generation_uid", uid, str);
2426 SET_UID_METADATA(pb, "uid", uid, str);
2432 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2434 MXFContext *mxf = arg;
2435 AVFormatContext *s = mxf->fc;
2439 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2440 SET_STR_METADATA(pb, "project_name", str);
2445 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2446 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2447 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2448 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2449 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2450 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2451 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2452 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2453 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2454 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2455 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2456 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2457 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2458 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2459 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2460 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2461 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2462 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2463 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2464 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2465 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2466 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2467 { { 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 */
2468 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2469 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2470 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2471 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2472 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2473 { { 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 */
2474 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2475 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2476 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2477 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2478 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2479 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2480 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2481 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x23,0x00 }, mxf_read_essence_container_data, sizeof(MXFEssenceContainerData), EssenceContainerData },
2482 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2485 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2488 case MultipleDescriptor:
2490 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2491 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2499 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2501 AVIOContext *pb = mxf->fc->pb;
2502 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2503 uint64_t klv_end = avio_tell(pb) + klv->length;
2506 return AVERROR(ENOMEM);
2507 mxf_metadataset_init(ctx, type);
2508 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2510 int tag = avio_rb16(pb);
2511 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2512 uint64_t next = avio_tell(pb) + size;
2515 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2516 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2517 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2520 if (tag > 0x7FFF) { /* dynamic tag */
2522 for (i = 0; i < mxf->local_tags_count; i++) {
2523 int local_tag = AV_RB16(mxf->local_tags+i*18);
2524 if (local_tag == tag) {
2525 memcpy(uid, mxf->local_tags+i*18+2, 16);
2526 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2527 PRINT_KEY(mxf->fc, "uid", uid);
2531 if (ctx_size && tag == 0x3C0A) {
2532 avio_read(pb, ctx->uid, 16);
2533 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2534 mxf_free_metadataset(&ctx, !!ctx_size);
2538 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2539 * it extending past the end of the KLV though (zzuf5.mxf). */
2540 if (avio_tell(pb) > klv_end) {
2543 mxf_free_metadataset(&ctx, !!ctx_size);
2546 av_log(mxf->fc, AV_LOG_ERROR,
2547 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2549 return AVERROR_INVALIDDATA;
2550 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2551 avio_seek(pb, next, SEEK_SET);
2553 if (ctx_size) ctx->type = type;
2554 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2558 * Matches any partition pack key, in other words:
2562 * @return non-zero if the key is a partition pack key, zero otherwise
2564 static int mxf_is_partition_pack_key(UID key)
2566 //NOTE: this is a little lax since it doesn't constraint key[14]
2567 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2568 key[13] >= 2 && key[13] <= 4;
2572 * Parses a metadata KLV
2573 * @return <0 on error, 0 otherwise
2575 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2576 int ctx_size, enum MXFMetadataSetType type)
2578 AVFormatContext *s = mxf->fc;
2580 if (klv.key[5] == 0x53) {
2581 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2583 uint64_t next = avio_tell(s->pb) + klv.length;
2584 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2586 /* only seek forward, else this can loop for a long time */
2587 if (avio_tell(s->pb) > next) {
2588 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2590 return AVERROR_INVALIDDATA;
2593 avio_seek(s->pb, next, SEEK_SET);
2596 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2603 * Seeks to the previous partition and parses it, if possible
2604 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2606 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2608 AVIOContext *pb = mxf->fc->pb;
2610 int64_t current_partition_ofs;
2613 if (!mxf->current_partition ||
2614 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2615 return 0; /* we've parsed all partitions */
2617 /* seek to previous partition */
2618 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2619 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2620 mxf->current_partition = NULL;
2622 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2624 /* Make sure this is actually a PartitionPack, and if so parse it.
2627 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2628 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2632 if (!mxf_is_partition_pack_key(klv.key)) {
2633 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2634 return AVERROR_INVALIDDATA;
2637 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2638 * can point to just before the current partition, causing klv_read_packet()
2639 * to sync back up to it. See deadlock3.mxf
2641 if (klv.offset >= current_partition_ofs) {
2642 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2643 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2644 return AVERROR_INVALIDDATA;
2647 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2654 * Called when essence is encountered
2655 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2657 static int mxf_parse_handle_essence(MXFContext *mxf)
2659 AVIOContext *pb = mxf->fc->pb;
2662 if (mxf->parsing_backward) {
2663 return mxf_seek_to_previous_partition(mxf);
2665 if (!mxf->footer_partition) {
2666 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2670 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2672 /* remember where we were so we don't end up seeking further back than this */
2673 mxf->last_forward_tell = avio_tell(pb);
2675 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2676 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2680 /* seek to FooterPartition and parse backward */
2681 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2682 av_log(mxf->fc, AV_LOG_ERROR,
2683 "failed to seek to FooterPartition @ 0x%" PRIx64
2684 " (%"PRId64") - partial file?\n",
2685 mxf->run_in + mxf->footer_partition, ret);
2689 mxf->current_partition = NULL;
2690 mxf->parsing_backward = 1;
2697 * Called when the next partition or EOF is encountered
2698 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2700 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2702 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2706 * Figures out the proper offset and length of the essence container in each partition
2708 static void mxf_compute_essence_containers(MXFContext *mxf)
2712 /* everything is already correct */
2713 if (mxf->op == OPAtom)
2716 for (x = 0; x < mxf->partitions_count; x++) {
2717 MXFPartition *p = &mxf->partitions[x];
2720 continue; /* BodySID == 0 -> no essence */
2722 if (x >= mxf->partitions_count - 1)
2723 break; /* FooterPartition - can't compute length (and we don't need to) */
2725 /* essence container spans to the next partition */
2726 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2728 if (p->essence_length < 0) {
2729 /* next ThisPartition < essence_offset */
2730 p->essence_length = 0;
2731 av_log(mxf->fc, AV_LOG_ERROR,
2732 "partition %i: bad ThisPartition = %"PRIX64"\n",
2733 x+1, mxf->partitions[x+1].this_partition);
2738 static int64_t round_to_kag(int64_t position, int kag_size)
2740 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2741 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2742 int64_t ret = (position / kag_size) * kag_size;
2743 return ret == position ? ret : ret + kag_size;
2746 static int is_pcm(enum AVCodecID codec_id)
2748 /* we only care about "normal" PCM codecs until we get samples */
2749 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2752 static AVStream* mxf_get_opatom_stream(MXFContext *mxf)
2756 if (mxf->op != OPAtom)
2759 for (i = 0; i < mxf->fc->nb_streams; i++) {
2760 if (mxf->fc->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_DATA)
2762 return mxf->fc->streams[i];
2768 * Deal with the case where for some audio atoms EditUnitByteCount is
2769 * very small (2, 4..). In those cases we should read more than one
2770 * sample per call to mxf_read_packet().
2772 static void mxf_handle_small_eubc(AVFormatContext *s)
2774 MXFContext *mxf = s->priv_data;
2776 /* assuming non-OPAtom == frame wrapped
2777 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2778 AVStream *st = mxf_get_opatom_stream(mxf);
2782 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2783 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
2784 !is_pcm(st->codecpar->codec_id) ||
2785 mxf->nb_index_tables != 1 ||
2786 mxf->index_tables[0].nb_segments != 1 ||
2787 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2790 /* arbitrarily default to 48 kHz PAL audio frame size */
2791 /* TODO: We could compute this from the ratio between the audio
2792 * and video edit rates for 48 kHz NTSC we could use the
2793 * 1802-1802-1802-1802-1801 pattern. */
2794 mxf->edit_units_per_packet = 1920;
2798 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2800 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2802 AVFormatContext *s = mxf->fc;
2803 AVStream *st = NULL;
2804 MXFIndexTableSegment *segment = NULL;
2805 MXFPartition *p = NULL;
2806 int essence_partition_count = 0;
2809 st = mxf_get_opatom_stream(mxf);
2813 /* TODO: support raw video without an index if they exist */
2814 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(st->codecpar->codec_id))
2817 /* check if file already has a IndexTableSegment */
2818 for (i = 0; i < mxf->metadata_sets_count; i++) {
2819 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2823 /* find the essence partition */
2824 for (i = 0; i < mxf->partitions_count; i++) {
2825 /* BodySID == 0 -> no essence */
2826 if (!mxf->partitions[i].body_sid)
2829 p = &mxf->partitions[i];
2830 essence_partition_count++;
2833 /* only handle files with a single essence partition */
2834 if (essence_partition_count != 1)
2837 if (!(segment = av_mallocz(sizeof(*segment))))
2838 return AVERROR(ENOMEM);
2840 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2841 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2845 segment->type = IndexTableSegment;
2846 /* stream will be treated as small EditUnitByteCount */
2847 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->channels) >> 3;
2848 segment->index_start_position = 0;
2849 segment->index_duration = s->streams[0]->duration;
2850 segment->index_sid = p->index_sid;
2851 segment->body_sid = p->body_sid;
2855 static void mxf_read_random_index_pack(AVFormatContext *s)
2857 MXFContext *mxf = s->priv_data;
2859 int64_t file_size, max_rip_length, min_rip_length;
2862 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
2865 file_size = avio_size(s->pb);
2867 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2868 * The limit below assumes a file with nothing but partition packs and a RIP.
2869 * Before changing this, consider that a muxer may place each sample in its own partition.
2871 * 105 is the size of the smallest possible PartitionPack
2872 * 12 is the size of each RIP entry
2873 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2875 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2876 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2878 /* We're only interested in RIPs with at least two entries.. */
2879 min_rip_length = 16+1+24+4;
2881 /* See S377m section 11 */
2882 avio_seek(s->pb, file_size - 4, SEEK_SET);
2883 length = avio_rb32(s->pb);
2885 if (length < min_rip_length || length > max_rip_length)
2887 avio_seek(s->pb, file_size - length, SEEK_SET);
2888 if (klv_read_packet(&klv, s->pb) < 0 ||
2889 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2890 klv.length != length - 20)
2893 avio_skip(s->pb, klv.length - 12);
2894 mxf->footer_partition = avio_rb64(s->pb);
2897 if (mxf->run_in + mxf->footer_partition >= file_size) {
2898 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2899 mxf->footer_partition = 0;
2903 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2906 static int mxf_read_header(AVFormatContext *s)
2908 MXFContext *mxf = s->priv_data;
2910 int64_t essence_offset = 0;
2913 mxf->last_forward_tell = INT64_MAX;
2914 mxf->edit_units_per_packet = 1;
2916 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2917 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2918 return AVERROR_INVALIDDATA;
2920 avio_seek(s->pb, -14, SEEK_CUR);
2922 mxf->run_in = avio_tell(s->pb);
2924 mxf_read_random_index_pack(s);
2926 while (!avio_feof(s->pb)) {
2927 const MXFMetadataReadTableEntry *metadata;
2929 if (klv_read_packet(&klv, s->pb) < 0) {
2930 /* EOF - seek to previous partition or stop */
2931 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2937 PRINT_KEY(s, "read header", klv.key);
2938 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2939 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2940 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2941 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2942 IS_KLV_KEY(klv.key, mxf_system_item_key_cp) ||
2943 IS_KLV_KEY(klv.key, mxf_system_item_key_gc)) {
2945 if (!mxf->current_partition) {
2946 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2947 return AVERROR_INVALIDDATA;
2950 if (!mxf->current_partition->essence_offset) {
2951 /* for OP1a we compute essence_offset
2952 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2953 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2954 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2956 int64_t op1a_essence_offset =
2957 mxf->current_partition->this_partition +
2958 round_to_kag(mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2959 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2960 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2962 if (mxf->op == OPAtom) {
2963 /* point essence_offset to the actual data
2964 * OPAtom has all the essence in one big KLV
2966 mxf->current_partition->essence_offset = avio_tell(s->pb);
2967 mxf->current_partition->essence_length = klv.length;
2969 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2970 if (IS_KLV_KEY(klv.key, mxf_system_item_key_cp) || IS_KLV_KEY(klv.key, mxf_system_item_key_gc))
2971 mxf->current_partition->essence_offset = klv.offset;
2973 mxf->current_partition->essence_offset = op1a_essence_offset;
2977 if (!essence_offset)
2978 essence_offset = klv.offset;
2980 /* seek to footer, previous partition or stop */
2981 if (mxf_parse_handle_essence(mxf) <= 0)
2984 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2985 /* next partition pack - keep going, seek to previous partition or stop */
2986 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2988 else if (mxf->parsing_backward)
2990 /* we're still parsing forward. proceed to parsing this partition pack */
2993 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2994 if (IS_KLV_KEY(klv.key, metadata->key)) {
2995 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
3000 if (!metadata->read) {
3001 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
3003 avio_skip(s->pb, klv.length);
3006 /* FIXME avoid seek */
3007 if (!essence_offset) {
3008 av_log(s, AV_LOG_ERROR, "no essence\n");
3009 ret = AVERROR_INVALIDDATA;
3012 avio_seek(s->pb, essence_offset, SEEK_SET);
3014 mxf_compute_essence_containers(mxf);
3016 /* we need to do this before computing the index tables
3017 * to be able to fill in zero IndexDurations with st->duration */
3018 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
3021 mxf_handle_missing_index_segment(mxf);
3022 if ((ret = mxf_compute_index_tables(mxf)) < 0)
3025 if (mxf->nb_index_tables > 1) {
3026 /* TODO: look up which IndexSID to use via EssenceContainerData */
3027 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
3028 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
3029 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
3030 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
3031 ret = AVERROR_INVALIDDATA;
3035 mxf_handle_small_eubc(s);
3045 * Sets mxf->current_edit_unit based on what offset we're currently at.
3046 * @return next_ofs if OK, <0 on error
3048 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
3050 int64_t last_ofs = -1, next_ofs = -1;
3051 MXFIndexTable *t = &mxf->index_tables[0];
3053 /* this is called from the OP1a demuxing logic, which means there
3054 * may be no index tables */
3055 if (mxf->nb_index_tables <= 0)
3058 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
3059 while (mxf->current_edit_unit >= 0) {
3060 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
3063 if (next_ofs <= last_ofs) {
3064 /* large next_ofs didn't change or current_edit_unit wrapped
3065 * around this fixes the infinite loop on zzuf3.mxf */
3066 av_log(mxf->fc, AV_LOG_ERROR,
3067 "next_ofs didn't change. not deriving packet timestamps\n");
3071 if (next_ofs > current_offset)
3074 last_ofs = next_ofs;
3075 mxf->current_edit_unit++;
3078 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
3079 if (mxf->current_edit_unit < 0)
3085 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
3086 uint64_t *sample_count)
3088 int i, total = 0, size = 0;
3089 AVStream *st = mxf->fc->streams[stream_index];
3090 MXFTrack *track = st->priv_data;
3091 AVRational time_base = av_inv_q(track->edit_rate);
3092 AVRational sample_rate = av_inv_q(st->time_base);
3093 const MXFSamplesPerFrame *spf = NULL;
3095 if ((sample_rate.num / sample_rate.den) == 48000)
3096 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
3098 int remainder = (sample_rate.num * time_base.num) %
3099 (time_base.den * sample_rate.den);
3100 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
3101 av_mul_q(sample_rate, time_base)));
3103 av_log(mxf->fc, AV_LOG_WARNING,
3104 "seeking detected on stream #%d with time base (%d/%d) and "
3105 "sample rate (%d/%d), audio pts won't be accurate.\n",
3106 stream_index, time_base.num, time_base.den,
3107 sample_rate.num, sample_rate.den);
3111 while (spf->samples_per_frame[size]) {
3112 total += spf->samples_per_frame[size];
3118 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
3119 for (i = 0; i < mxf->current_edit_unit % size; i++) {
3120 *sample_count += spf->samples_per_frame[i];
3126 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecParameters *par,
3129 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
3130 int64_t bits_per_sample = par->bits_per_coded_sample;
3132 if (!bits_per_sample)
3133 bits_per_sample = av_get_bits_per_sample(par->codec_id);
3135 pkt->pts = track->sample_count;
3137 if ( par->channels <= 0
3138 || bits_per_sample <= 0
3139 || par->channels * (int64_t)bits_per_sample < 8)
3140 return AVERROR(EINVAL);
3141 track->sample_count += pkt->size / (par->channels * (int64_t)bits_per_sample / 8);
3145 static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt, int64_t next_ofs)
3147 AVCodecParameters *par = st->codecpar;
3148 MXFTrack *track = st->priv_data;
3150 if (par->codec_type == AVMEDIA_TYPE_VIDEO && (next_ofs >= 0 || next_ofs == -2 && st->duration == mxf->current_edit_unit + 1)) {
3151 /* mxf->current_edit_unit good - see if we have an
3152 * index table to derive timestamps from */
3153 MXFIndexTable *t = &mxf->index_tables[0];
3155 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
3156 pkt->dts = mxf->current_edit_unit + t->first_dts;
3157 pkt->pts = t->ptses[mxf->current_edit_unit];
3158 } else if (track && track->intra_only) {
3159 /* intra-only -> PTS = EditUnit.
3160 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3161 pkt->pts = mxf->current_edit_unit;
3163 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
3164 int ret = mxf_set_audio_pts(mxf, par, pkt);
3171 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
3174 MXFContext *mxf = s->priv_data;
3177 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
3178 PRINT_KEY(s, "read packet", klv.key);
3179 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3180 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
3181 ret = mxf_decrypt_triplet(s, pkt, &klv);
3183 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
3188 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3189 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3190 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
3191 int body_sid = find_body_sid_by_offset(mxf, klv.offset);
3192 int index = mxf_get_stream_index(s, &klv, body_sid);
3193 int64_t next_ofs, next_klv;
3197 av_log(s, AV_LOG_ERROR,
3198 "error getting stream index %"PRIu32"\n",
3199 AV_RB32(klv.key + 12));
3203 st = s->streams[index];
3205 if (s->streams[index]->discard == AVDISCARD_ALL)
3208 next_klv = avio_tell(s->pb) + klv.length;
3209 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
3211 if (next_ofs >= 0 && next_klv > next_ofs) {
3212 /* if this check is hit then it's possible OPAtom was treated as OP1a
3213 * truncate the packet since it's probably very large (>2 GiB is common) */
3214 avpriv_request_sample(s,
3215 "OPAtom misinterpreted as OP1a? "
3216 "KLV for edit unit %i extending into "
3218 mxf->current_edit_unit);
3219 klv.length = next_ofs - avio_tell(s->pb);
3222 /* check for 8 channels AES3 element */
3223 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
3224 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
3227 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
3231 ret = av_get_packet(s->pb, pkt, klv.length);
3235 pkt->stream_index = index;
3236 pkt->pos = klv.offset;
3238 ret = mxf_set_pts(mxf, st, pkt, next_ofs);
3242 /* seek for truncated packets */
3243 avio_seek(s->pb, next_klv, SEEK_SET);
3248 avio_skip(s->pb, klv.length);
3250 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3253 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3255 MXFContext *mxf = s->priv_data;
3257 int64_t ret64, pos, next_pos;
3262 if (mxf->op != OPAtom)
3263 return mxf_read_packet_old(s, pkt);
3265 // If we have no streams then we basically are at EOF
3266 st = mxf_get_opatom_stream(mxf);
3270 /* OPAtom - clip wrapped demuxing */
3271 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3272 t = &mxf->index_tables[0];
3274 if (mxf->current_edit_unit >= st->duration)
3277 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3279 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3282 /* compute size by finding the next edit unit or the end of the essence container
3283 * not pretty, but it works */
3284 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3285 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3286 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3287 return AVERROR_INVALIDDATA;
3290 if ((size = next_pos - pos) <= 0) {
3291 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3292 return AVERROR_INVALIDDATA;
3295 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3298 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3301 pkt->stream_index = st->index;
3303 ret = mxf_set_pts(mxf, st, pkt, next_pos);
3307 mxf->current_edit_unit += edit_units;
3312 static int mxf_read_close(AVFormatContext *s)
3314 MXFContext *mxf = s->priv_data;
3317 av_freep(&mxf->packages_refs);
3318 av_freep(&mxf->essence_container_data_refs);
3320 for (i = 0; i < s->nb_streams; i++)
3321 s->streams[i]->priv_data = NULL;
3323 for (i = 0; i < mxf->metadata_sets_count; i++) {
3324 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3326 av_freep(&mxf->partitions);
3327 av_freep(&mxf->metadata_sets);
3328 av_freep(&mxf->aesc);
3329 av_freep(&mxf->local_tags);
3331 if (mxf->index_tables) {
3332 for (i = 0; i < mxf->nb_index_tables; i++) {
3333 av_freep(&mxf->index_tables[i].segments);
3334 av_freep(&mxf->index_tables[i].ptses);
3335 av_freep(&mxf->index_tables[i].fake_index);
3336 av_freep(&mxf->index_tables[i].offsets);
3339 av_freep(&mxf->index_tables);
3344 static int mxf_probe(AVProbeData *p) {
3345 const uint8_t *bufp = p->buf;
3346 const uint8_t *end = p->buf + p->buf_size;
3348 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3351 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3352 end -= sizeof(mxf_header_partition_pack_key);
3354 for (; bufp < end;) {
3355 if (!((bufp[13] - 1) & 0xF2)){
3356 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3357 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3358 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3359 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3360 return AVPROBE_SCORE_MAX;
3369 /* rudimentary byte seek */
3370 /* XXX: use MXF Index */
3371 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3373 AVStream *st = s->streams[stream_index];
3375 MXFContext* mxf = s->priv_data;
3379 MXFTrack *source_track = st->priv_data;
3381 if(st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
3384 /* if audio then truncate sample_time to EditRate */
3385 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
3386 sample_time = av_rescale_q(sample_time, st->time_base,
3387 av_inv_q(source_track->edit_rate));
3389 if (mxf->nb_index_tables <= 0) {
3391 return AVERROR_INVALIDDATA;
3392 if (sample_time < 0)
3394 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3396 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3400 ff_update_cur_dts(s, st, sample_time);
3401 mxf->current_edit_unit = sample_time;
3403 t = &mxf->index_tables[0];
3405 /* clamp above zero, else ff_index_search_timestamp() returns negative
3406 * this also means we allow seeking before the start */
3407 sample_time = FFMAX(sample_time, 0);
3409 if (t->fake_index) {
3410 /* The first frames may not be keyframes in presentation order, so
3411 * we have to advance the target to be able to find the first
3412 * keyframe backwards... */
3413 if (!(flags & AVSEEK_FLAG_ANY) &&
3414 (flags & AVSEEK_FLAG_BACKWARD) &&
3415 t->ptses[0] != AV_NOPTS_VALUE &&
3416 sample_time < t->ptses[0] &&
3417 (t->fake_index[t->ptses[0]].flags & AVINDEX_KEYFRAME))
3418 sample_time = t->ptses[0];
3420 /* behave as if we have a proper index */
3421 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3423 /* get the stored order index from the display order index */
3424 sample_time += t->offsets[sample_time];
3426 /* no IndexEntryArray (one or more CBR segments)
3427 * make sure we don't seek past the end */
3428 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3431 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3434 ff_update_cur_dts(s, st, sample_time);
3435 mxf->current_edit_unit = sample_time;
3436 avio_seek(s->pb, seekpos, SEEK_SET);
3439 // Update all tracks sample count
3440 for (i = 0; i < s->nb_streams; i++) {
3441 AVStream *cur_st = s->streams[i];
3442 MXFTrack *cur_track = cur_st->priv_data;
3443 uint64_t current_sample_count = 0;
3444 if (cur_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3445 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3449 cur_track->sample_count = current_sample_count;
3455 AVInputFormat ff_mxf_demuxer = {
3457 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3458 .flags = AVFMT_SEEK_TO_PTS,
3459 .priv_data_size = sizeof(MXFContext),
3460 .read_probe = mxf_probe,
3461 .read_header = mxf_read_header,
3462 .read_packet = mxf_read_packet,
3463 .read_close = mxf_read_close,
3464 .read_seek = mxf_read_seek,