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"
55 #include "libavutil/opt.h"
60 #define MXF_MAX_CHUNK_SIZE (32 << 20)
79 OPSONYOpt, /* FATE sample, violates the spec in places */
88 typedef struct MXFPartition {
91 MXFPartitionType type;
92 uint64_t previous_partition;
95 int64_t this_partition;
96 int64_t essence_offset; ///< absolute offset of essence
97 int64_t essence_length;
99 int64_t header_byte_count;
100 int64_t index_byte_count;
102 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
104 KLVPacket first_essence_klv;
107 typedef struct MXFCryptoContext {
109 enum MXFMetadataSetType type;
110 UID source_container_ul;
113 typedef struct MXFStructuralComponent {
115 enum MXFMetadataSetType type;
116 UID source_package_ul;
117 UID source_package_uid;
118 UID data_definition_ul;
120 int64_t start_position;
122 } MXFStructuralComponent;
124 typedef struct MXFSequence {
126 enum MXFMetadataSetType type;
127 UID data_definition_ul;
128 UID *structural_components_refs;
129 int structural_components_count;
134 typedef struct MXFTrack {
136 enum MXFMetadataSetType type;
139 struct AVRational rate;
141 } MXFTimecodeComponent;
145 enum MXFMetadataSetType type;
146 UID input_segment_ref;
147 } MXFPulldownComponent;
151 enum MXFMetadataSetType type;
152 UID *structural_components_refs;
153 int structural_components_count;
159 enum MXFMetadataSetType type;
166 enum MXFMetadataSetType type;
167 MXFSequence *sequence; /* mandatory, and only one */
171 uint8_t track_number[4];
172 AVRational edit_rate;
174 uint64_t sample_count;
175 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
178 MXFWrappingScheme wrapping;
179 int edit_units_per_packet; /* how many edit units to read at a time (PCM, ClipWrapped) */
182 typedef struct MXFDescriptor {
184 enum MXFMetadataSetType type;
185 UID essence_container_ul;
186 UID essence_codec_ul;
188 AVRational sample_rate;
189 AVRational aspect_ratio;
191 int height; /* Field height, not frame height */
192 int frame_layout; /* See MXFFrameLayout enum */
193 int video_line_map[2];
194 #define MXF_FIELD_DOMINANCE_DEFAULT 0
195 #define MXF_FIELD_DOMINANCE_FF 1 /* coded first, displayed first */
196 #define MXF_FIELD_DOMINANCE_FL 2 /* coded first, displayed last */
200 int64_t duration; /* ContainerDuration optional property */
201 unsigned int component_depth;
202 unsigned int horiz_subsampling;
203 unsigned int vert_subsampling;
204 UID *sub_descriptors_refs;
205 int sub_descriptors_count;
209 enum AVPixelFormat pix_fmt;
212 typedef struct MXFIndexTableSegment {
214 enum MXFMetadataSetType type;
215 int edit_unit_byte_count;
218 AVRational index_edit_rate;
219 uint64_t index_start_position;
220 uint64_t index_duration;
221 int8_t *temporal_offset_entries;
223 uint64_t *stream_offset_entries;
224 int nb_index_entries;
225 } MXFIndexTableSegment;
227 typedef struct MXFPackage {
229 enum MXFMetadataSetType type;
234 MXFDescriptor *descriptor; /* only one */
241 typedef struct MXFEssenceContainerData {
243 enum MXFMetadataSetType type;
248 } MXFEssenceContainerData;
250 typedef struct MXFMetadataSet {
252 enum MXFMetadataSetType type;
255 /* decoded index table */
256 typedef struct MXFIndexTable {
259 int nb_ptses; /* number of PTSes or total duration of index */
260 int64_t first_dts; /* DTS = EditUnit + first_dts */
261 int64_t *ptses; /* maps EditUnit -> PTS */
263 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
264 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
265 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
268 typedef struct MXFContext {
269 const AVClass *class; /**< Class for private options. */
270 MXFPartition *partitions;
271 unsigned partitions_count;
275 UID *essence_container_data_refs;
276 int essence_container_data_count;
277 MXFMetadataSet **metadata_sets;
278 int metadata_sets_count;
282 int local_tags_count;
283 uint64_t footer_partition;
284 KLVPacket current_klv_data;
286 MXFPartition *current_partition;
287 int parsing_backward;
288 int64_t last_forward_tell;
289 int last_forward_partition;
291 MXFIndexTable *index_tables;
295 /* NOTE: klv_offset is not set (-1) for local keys */
296 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
298 typedef struct MXFMetadataReadTableEntry {
300 MXFMetadataReadFunc *read;
302 enum MXFMetadataSetType type;
303 } MXFMetadataReadTableEntry;
305 static int mxf_read_close(AVFormatContext *s);
307 /* partial keys to match */
308 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
309 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
310 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
311 static const uint8_t mxf_canopus_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x0a,0x0e,0x0f,0x03,0x01 };
312 static const uint8_t mxf_system_item_key_cp[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
313 static const uint8_t mxf_system_item_key_gc[] = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x03,0x01,0x14 };
314 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
315 /* complete keys to match */
316 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 };
317 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
318 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
319 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 };
320 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
321 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
322 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
323 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 };
324 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 };
326 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
328 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
330 MXFIndexTableSegment *seg;
331 switch ((*ctx)->type) {
333 av_freep(&((MXFDescriptor *)*ctx)->extradata);
335 case MultipleDescriptor:
336 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
339 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
342 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
345 case MaterialPackage:
346 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
347 av_freep(&((MXFPackage *)*ctx)->name);
348 av_freep(&((MXFPackage *)*ctx)->comment_refs);
351 av_freep(&((MXFTaggedValue *)*ctx)->name);
352 av_freep(&((MXFTaggedValue *)*ctx)->value);
355 av_freep(&((MXFTrack *)*ctx)->name);
357 case IndexTableSegment:
358 seg = (MXFIndexTableSegment *)*ctx;
359 av_freep(&seg->temporal_offset_entries);
360 av_freep(&seg->flag_entries);
361 av_freep(&seg->stream_offset_entries);
369 static int64_t klv_decode_ber_length(AVIOContext *pb)
371 uint64_t size = avio_r8(pb);
372 if (size & 0x80) { /* long form */
373 int bytes_num = size & 0x7f;
374 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
376 return AVERROR_INVALIDDATA;
379 size = size << 8 | avio_r8(pb);
381 if (size > INT64_MAX)
382 return AVERROR_INVALIDDATA;
386 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
389 for (i = 0; i < size && !avio_feof(pb); i++) {
393 else if (b != key[i])
399 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
402 if (!mxf_read_sync(pb, mxf_klv_key, 4))
403 return AVERROR_INVALIDDATA;
404 klv->offset = avio_tell(pb) - 4;
405 memcpy(klv->key, mxf_klv_key, 4);
406 avio_read(pb, klv->key + 4, 12);
407 length = klv_decode_ber_length(pb);
410 klv->length = length;
412 if (pos > INT64_MAX - length)
413 return AVERROR_INVALIDDATA;
414 klv->next_klv = pos + length;
418 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv, int body_sid)
422 for (i = 0; i < s->nb_streams; i++) {
423 MXFTrack *track = s->streams[i]->priv_data;
425 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)))
428 /* return 0 if only one stream, for OP Atom files with 0 as track number */
429 return s->nb_streams == 1 && s->streams[0]->priv_data ? 0 : -1;
432 static int find_body_sid_by_offset(MXFContext *mxf, int64_t offset)
434 // we look for partition where the offset is placed
436 int64_t this_partition;
439 b = mxf->partitions_count;
443 this_partition = mxf->partitions[m].this_partition;
444 if (this_partition <= offset)
452 return mxf->partitions[a].body_sid;
455 static int mxf_get_eia608_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt, int64_t length)
457 int count = avio_rb16(s->pb);
458 int cdp_identifier, cdp_length, cdp_footer_id, ccdata_id, cc_count;
459 int line_num, sample_coding, sample_count;
460 int did, sdid, data_length;
464 av_log(s, AV_LOG_WARNING, "unsupported multiple ANC packets (%d) per KLV packet\n", count);
466 for (i = 0; i < count; i++) {
468 av_log(s, AV_LOG_ERROR, "error reading s436m packet %"PRId64"\n", length);
469 return AVERROR_INVALIDDATA;
471 line_num = avio_rb16(s->pb);
472 avio_r8(s->pb); // wrapping type
473 sample_coding = avio_r8(s->pb);
474 sample_count = avio_rb16(s->pb);
475 length -= 6 + 8 + sample_count;
476 if (line_num != 9 && line_num != 11)
478 if (sample_coding == 7 || sample_coding == 8 || sample_coding == 9) {
479 av_log(s, AV_LOG_WARNING, "unsupported s436m 10 bit sample coding\n");
483 return AVERROR_INVALIDDATA;
485 avio_rb32(s->pb); // array count
486 avio_rb32(s->pb); // array elem size
487 did = avio_r8(s->pb);
488 sdid = avio_r8(s->pb);
489 data_length = avio_r8(s->pb);
490 if (did != 0x61 || sdid != 1) {
491 av_log(s, AV_LOG_WARNING, "unsupported did or sdid: %x %x\n", did, sdid);
494 cdp_identifier = avio_rb16(s->pb); // cdp id
495 if (cdp_identifier != 0x9669) {
496 av_log(s, AV_LOG_ERROR, "wrong cdp identifier %x\n", cdp_identifier);
497 return AVERROR_INVALIDDATA;
499 cdp_length = avio_r8(s->pb);
500 avio_r8(s->pb); // cdp_frame_rate
501 avio_r8(s->pb); // cdp_flags
502 avio_rb16(s->pb); // cdp_hdr_sequence_cntr
503 ccdata_id = avio_r8(s->pb); // ccdata_id
504 if (ccdata_id != 0x72) {
505 av_log(s, AV_LOG_ERROR, "wrong cdp data section %x\n", ccdata_id);
506 return AVERROR_INVALIDDATA;
508 cc_count = avio_r8(s->pb) & 0x1f;
509 ret = av_get_packet(s->pb, pkt, cc_count * 3);
512 if (cdp_length - 9 - 4 < cc_count * 3) {
513 av_log(s, AV_LOG_ERROR, "wrong cdp size %d cc count %d\n", cdp_length, cc_count);
514 return AVERROR_INVALIDDATA;
516 avio_skip(s->pb, data_length - 9 - 4 - cc_count * 3);
517 cdp_footer_id = avio_r8(s->pb);
518 if (cdp_footer_id != 0x74) {
519 av_log(s, AV_LOG_ERROR, "wrong cdp footer section %x\n", cdp_footer_id);
520 return AVERROR_INVALIDDATA;
522 avio_rb16(s->pb); // cdp_ftr_sequence_cntr
523 avio_r8(s->pb); // packet_checksum
530 /* XXX: use AVBitStreamFilter */
531 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
533 const uint8_t *buf_ptr, *end_ptr;
537 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
538 return AVERROR_INVALIDDATA;
539 length = av_get_packet(pb, pkt, length);
542 data_ptr = pkt->data;
543 end_ptr = pkt->data + length;
544 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
545 for (; end_ptr - buf_ptr >= st->codecpar->channels * 4; ) {
546 for (i = 0; i < st->codecpar->channels; i++) {
547 uint32_t sample = bytestream_get_le32(&buf_ptr);
548 if (st->codecpar->bits_per_coded_sample == 24)
549 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
551 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
553 buf_ptr += 32 - st->codecpar->channels*4; // always 8 channels stored SMPTE 331M
555 av_shrink_packet(pkt, data_ptr - pkt->data);
559 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
561 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
562 MXFContext *mxf = s->priv_data;
563 AVIOContext *pb = s->pb;
564 int64_t end = avio_tell(pb) + klv->length;
567 uint64_t plaintext_size;
573 if (!mxf->aesc && s->key && s->keylen == 16) {
574 mxf->aesc = av_aes_alloc();
576 return AVERROR(ENOMEM);
577 av_aes_init(mxf->aesc, s->key, 128, 1);
580 size = klv_decode_ber_length(pb);
585 klv_decode_ber_length(pb);
586 plaintext_size = avio_rb64(pb);
588 klv_decode_ber_length(pb);
589 avio_read(pb, klv->key, 16);
590 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
591 return AVERROR_INVALIDDATA;
593 body_sid = find_body_sid_by_offset(mxf, klv->offset);
594 index = mxf_get_stream_index(s, klv, body_sid);
596 return AVERROR_INVALIDDATA;
598 klv_decode_ber_length(pb);
599 orig_size = avio_rb64(pb);
600 if (orig_size < plaintext_size)
601 return AVERROR_INVALIDDATA;
603 size = klv_decode_ber_length(pb);
604 if (size < 32 || size - 32 < orig_size)
605 return AVERROR_INVALIDDATA;
606 avio_read(pb, ivec, 16);
607 avio_read(pb, tmpbuf, 16);
609 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
610 if (memcmp(tmpbuf, checkv, 16))
611 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
613 size = av_get_packet(pb, pkt, size);
616 else if (size < plaintext_size)
617 return AVERROR_INVALIDDATA;
618 size -= plaintext_size;
620 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
621 &pkt->data[plaintext_size], size >> 4, ivec, 1);
622 av_shrink_packet(pkt, orig_size);
623 pkt->stream_index = index;
624 avio_skip(pb, end - avio_tell(pb));
628 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
630 MXFContext *mxf = arg;
631 int item_num = avio_rb32(pb);
632 int item_len = avio_rb32(pb);
634 if (item_len != 18) {
635 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
636 return AVERROR_PATCHWELCOME;
638 if (item_num > 65536 || item_num < 0) {
639 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
640 return AVERROR_INVALIDDATA;
643 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
644 av_free(mxf->local_tags);
645 mxf->local_tags_count = 0;
646 mxf->local_tags = av_calloc(item_num, item_len);
647 if (!mxf->local_tags)
648 return AVERROR(ENOMEM);
649 mxf->local_tags_count = item_num;
650 avio_read(pb, mxf->local_tags, item_num*item_len);
654 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
656 MXFContext *mxf = arg;
657 MXFPartition *partition, *tmp_part;
659 uint64_t footer_partition;
660 uint32_t nb_essence_containers;
662 if (mxf->partitions_count >= INT_MAX / 2)
663 return AVERROR_INVALIDDATA;
665 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
667 return AVERROR(ENOMEM);
668 mxf->partitions = tmp_part;
670 if (mxf->parsing_backward) {
671 /* insert the new partition pack in the middle
672 * this makes the entries in mxf->partitions sorted by offset */
673 memmove(&mxf->partitions[mxf->last_forward_partition+1],
674 &mxf->partitions[mxf->last_forward_partition],
675 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
676 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
678 mxf->last_forward_partition++;
679 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
682 memset(partition, 0, sizeof(*partition));
683 mxf->partitions_count++;
684 partition->pack_length = avio_tell(pb) - klv_offset + size;
685 partition->pack_ofs = klv_offset;
689 partition->type = Header;
692 partition->type = BodyPartition;
695 partition->type = Footer;
698 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
699 return AVERROR_INVALIDDATA;
702 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
703 partition->closed = partition->type == Footer || !(uid[14] & 1);
704 partition->complete = uid[14] > 2;
706 partition->kag_size = avio_rb32(pb);
707 partition->this_partition = avio_rb64(pb);
708 partition->previous_partition = avio_rb64(pb);
709 footer_partition = avio_rb64(pb);
710 partition->header_byte_count = avio_rb64(pb);
711 partition->index_byte_count = avio_rb64(pb);
712 partition->index_sid = avio_rb32(pb);
713 partition->body_offset = avio_rb64(pb);
714 partition->body_sid = avio_rb32(pb);
715 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
716 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
717 return AVERROR_INVALIDDATA;
719 nb_essence_containers = avio_rb32(pb);
721 if (partition->this_partition &&
722 partition->previous_partition == partition->this_partition) {
723 av_log(mxf->fc, AV_LOG_ERROR,
724 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
725 partition->previous_partition);
726 /* override with the actual previous partition offset */
727 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
729 mxf->partitions + mxf->last_forward_partition - 2;
730 partition->previous_partition = prev->this_partition;
732 /* if no previous body partition are found point to the header
734 if (partition->previous_partition == partition->this_partition)
735 partition->previous_partition = 0;
736 av_log(mxf->fc, AV_LOG_ERROR,
737 "Overriding PreviousPartition with %"PRIx64"\n",
738 partition->previous_partition);
741 /* some files don't have FooterPartition set in every partition */
742 if (footer_partition) {
743 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
744 av_log(mxf->fc, AV_LOG_ERROR,
745 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
746 mxf->footer_partition, footer_partition);
748 mxf->footer_partition = footer_partition;
752 av_log(mxf->fc, AV_LOG_TRACE,
753 "PartitionPack: ThisPartition = 0x%"PRIX64
754 ", PreviousPartition = 0x%"PRIX64", "
755 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
756 partition->this_partition,
757 partition->previous_partition, footer_partition,
758 partition->index_sid, partition->body_sid);
760 /* sanity check PreviousPartition if set */
761 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
762 if (partition->previous_partition &&
763 mxf->run_in + partition->previous_partition >= klv_offset) {
764 av_log(mxf->fc, AV_LOG_ERROR,
765 "PreviousPartition points to this partition or forward\n");
766 return AVERROR_INVALIDDATA;
769 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
770 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
771 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
772 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
773 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
774 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
775 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
776 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
777 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
778 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
779 else if (op[12] == 0x10) {
780 /* SMPTE 390m: "There shall be exactly one essence container"
781 * The following block deals with files that violate this, namely:
782 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
783 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
784 if (nb_essence_containers != 1) {
785 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
789 av_log(mxf->fc, AV_LOG_WARNING,
790 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
791 nb_essence_containers,
792 op == OP1a ? "OP1a" : "OPAtom");
798 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
802 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
803 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
804 partition->kag_size);
806 if (mxf->op == OPSONYOpt)
807 partition->kag_size = 512;
809 partition->kag_size = 1;
811 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
817 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
819 MXFMetadataSet **tmp;
821 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
823 return AVERROR(ENOMEM);
824 mxf->metadata_sets = tmp;
825 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
826 mxf->metadata_sets_count++;
830 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
832 MXFCryptoContext *cryptocontext = arg;
834 return AVERROR_INVALIDDATA;
835 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
836 avio_read(pb, cryptocontext->source_container_ul, 16);
840 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
842 *count = avio_rb32(pb);
843 *refs = av_calloc(*count, sizeof(UID));
846 return AVERROR(ENOMEM);
848 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
849 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
853 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
858 if (size < 0 || size > INT_MAX/2)
859 return AVERROR(EINVAL);
861 buf_size = size + size / 2 + 1;
862 *str = av_malloc(buf_size);
864 return AVERROR(ENOMEM);
867 ret = avio_get_str16be(pb, size, *str, buf_size);
869 ret = avio_get_str16le(pb, size, *str, buf_size);
879 #define READ_STR16(type, big_endian) \
880 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
882 return mxf_read_utf16_string(pb, size, str, big_endian); \
888 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
890 MXFContext *mxf = arg;
893 if (mxf->packages_refs)
894 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
895 av_free(mxf->packages_refs);
896 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
898 av_free(mxf->essence_container_data_refs);
899 return mxf_read_strong_ref_array(pb, &mxf->essence_container_data_refs, &mxf->essence_container_data_count);
904 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
906 MXFStructuralComponent *source_clip = arg;
909 source_clip->duration = avio_rb64(pb);
912 source_clip->start_position = avio_rb64(pb);
915 /* UMID, only get last 16 bytes */
916 avio_read(pb, source_clip->source_package_ul, 16);
917 avio_read(pb, source_clip->source_package_uid, 16);
920 source_clip->source_track_id = avio_rb32(pb);
926 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
928 MXFTimecodeComponent *mxf_timecode = arg;
931 mxf_timecode->start_frame = avio_rb64(pb);
934 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
937 mxf_timecode->drop_frame = avio_r8(pb);
943 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
945 MXFPulldownComponent *mxf_pulldown = arg;
948 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
954 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
956 MXFTrack *track = arg;
959 track->track_id = avio_rb32(pb);
962 avio_read(pb, track->track_number, 4);
965 mxf_read_utf16be_string(pb, size, &track->name);
968 track->edit_rate.num = avio_rb32(pb);
969 track->edit_rate.den = avio_rb32(pb);
972 avio_read(pb, track->sequence_ref, 16);
978 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
980 MXFSequence *sequence = arg;
983 sequence->duration = avio_rb64(pb);
986 avio_read(pb, sequence->data_definition_ul, 16);
989 sequence->origin = avio_r8(pb);
992 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
993 &sequence->structural_components_count);
998 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1000 MXFEssenceGroup *essence_group = arg;
1003 essence_group->duration = avio_rb64(pb);
1006 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
1007 &essence_group->structural_components_count);
1012 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1014 MXFPackage *package = arg;
1017 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
1018 &package->tracks_count);
1021 avio_read(pb, package->package_ul, 16);
1022 avio_read(pb, package->package_uid, 16);
1025 avio_read(pb, package->descriptor_ref, 16);
1028 return mxf_read_utf16be_string(pb, size, &package->name);
1030 return mxf_read_strong_ref_array(pb, &package->comment_refs,
1031 &package->comment_count);
1036 static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1038 MXFEssenceContainerData *essence_data = arg;
1041 /* linked package umid UMID */
1042 avio_read(pb, essence_data->package_ul, 16);
1043 avio_read(pb, essence_data->package_uid, 16);
1046 essence_data->index_sid = avio_rb32(pb);
1049 essence_data->body_sid = avio_rb32(pb);
1055 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
1059 segment->nb_index_entries = avio_rb32(pb);
1061 length = avio_rb32(pb);
1062 if(segment->nb_index_entries && length < 11)
1063 return AVERROR_INVALIDDATA;
1065 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
1066 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
1067 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
1068 av_freep(&segment->temporal_offset_entries);
1069 av_freep(&segment->flag_entries);
1070 return AVERROR(ENOMEM);
1073 for (i = 0; i < segment->nb_index_entries; i++) {
1075 return AVERROR_INVALIDDATA;
1076 segment->temporal_offset_entries[i] = avio_r8(pb);
1077 avio_r8(pb); /* KeyFrameOffset */
1078 segment->flag_entries[i] = avio_r8(pb);
1079 segment->stream_offset_entries[i] = avio_rb64(pb);
1080 avio_skip(pb, length - 11);
1085 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1087 MXFIndexTableSegment *segment = arg;
1090 segment->edit_unit_byte_count = avio_rb32(pb);
1091 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
1094 segment->index_sid = avio_rb32(pb);
1095 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
1098 segment->body_sid = avio_rb32(pb);
1099 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
1102 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
1103 return mxf_read_index_entry_array(pb, segment);
1105 segment->index_edit_rate.num = avio_rb32(pb);
1106 segment->index_edit_rate.den = avio_rb32(pb);
1107 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
1108 segment->index_edit_rate.den);
1111 segment->index_start_position = avio_rb64(pb);
1112 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
1115 segment->index_duration = avio_rb64(pb);
1116 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
1122 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
1124 int code, value, ofs = 0;
1125 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
1129 value = avio_r8(pb);
1130 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
1133 layout[ofs++] = code;
1134 layout[ofs++] = value;
1136 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
1137 } while (code != 0); /* SMPTE 377M E.2.46 */
1139 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
1142 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1144 MXFDescriptor *descriptor = arg;
1145 int entry_count, entry_size;
1149 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
1150 &descriptor->sub_descriptors_count);
1151 case 0x3002: /* ContainerDuration */
1152 descriptor->duration = avio_rb64(pb);
1155 avio_read(pb, descriptor->essence_container_ul, 16);
1158 avio_read(pb, descriptor->codec_ul, 16);
1161 descriptor->linked_track_id = avio_rb32(pb);
1163 case 0x3201: /* PictureEssenceCoding */
1164 avio_read(pb, descriptor->essence_codec_ul, 16);
1167 descriptor->width = avio_rb32(pb);
1170 descriptor->height = avio_rb32(pb);
1173 descriptor->frame_layout = avio_r8(pb);
1176 entry_count = avio_rb32(pb);
1177 entry_size = avio_rb32(pb);
1178 if (entry_size == 4) {
1179 if (entry_count > 0)
1180 descriptor->video_line_map[0] = avio_rb32(pb);
1182 descriptor->video_line_map[0] = 0;
1183 if (entry_count > 1)
1184 descriptor->video_line_map[1] = avio_rb32(pb);
1186 descriptor->video_line_map[1] = 0;
1188 av_log(NULL, AV_LOG_WARNING, "VideoLineMap element size %d currently not supported\n", entry_size);
1191 descriptor->aspect_ratio.num = avio_rb32(pb);
1192 descriptor->aspect_ratio.den = avio_rb32(pb);
1195 descriptor->field_dominance = avio_r8(pb);
1198 descriptor->component_depth = avio_rb32(pb);
1201 descriptor->horiz_subsampling = avio_rb32(pb);
1204 descriptor->vert_subsampling = avio_rb32(pb);
1207 descriptor->sample_rate.num = avio_rb32(pb);
1208 descriptor->sample_rate.den = avio_rb32(pb);
1210 case 0x3D06: /* SoundEssenceCompression */
1211 avio_read(pb, descriptor->essence_codec_ul, 16);
1214 descriptor->channels = avio_rb32(pb);
1217 descriptor->bits_per_sample = avio_rb32(pb);
1220 mxf_read_pixel_layout(pb, descriptor);
1223 /* Private uid used by SONY C0023S01.mxf */
1224 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1225 if (descriptor->extradata)
1226 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1227 av_free(descriptor->extradata);
1228 descriptor->extradata_size = 0;
1229 descriptor->extradata = av_malloc(size);
1230 if (!descriptor->extradata)
1231 return AVERROR(ENOMEM);
1232 descriptor->extradata_size = size;
1233 avio_read(pb, descriptor->extradata, size);
1235 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1236 uint32_t rsiz = avio_rb16(pb);
1237 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1238 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1239 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1246 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1248 MXFTaggedValue *tagged_value = arg;
1254 avio_read(pb, key, 17);
1255 /* TODO: handle other types of of indirect values */
1256 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1257 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1258 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1259 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1264 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1266 MXFTaggedValue *tagged_value = arg;
1269 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1271 return mxf_read_indirect_value(tagged_value, pb, size);
1277 * Match an uid independently of the version byte and up to len common bytes
1280 static int mxf_match_uid(const UID key, const UID uid, int len)
1283 for (i = 0; i < len; i++) {
1284 if (i != 7 && key[i] != uid[i])
1290 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1292 while (uls->uid[0]) {
1293 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1300 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1306 for (i = 0; i < mxf->metadata_sets_count; i++) {
1307 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1308 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1309 return mxf->metadata_sets[i];
1315 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1316 // video essence container uls
1317 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000, NULL, 14 },
1318 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x10,0x60,0x01 }, 14, AV_CODEC_ID_H264, NULL, 15 }, /* H.264 */
1319 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x11,0x01,0x00 }, 14, AV_CODEC_ID_DNXHD, NULL, 14 }, /* VC-3 */
1320 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x12,0x01,0x00 }, 14, AV_CODEC_ID_VC1, NULL, 14 }, /* VC-1 */
1321 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x14,0x01,0x00 }, 14, AV_CODEC_ID_TIFF, NULL, 14 }, /* TIFF */
1322 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x15,0x01,0x00 }, 14, AV_CODEC_ID_DIRAC, NULL, 14 }, /* VC-2 */
1323 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x1b,0x01,0x00 }, 14, AV_CODEC_ID_CFHD, NULL, 14 }, /* VC-5 */
1324 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x1c,0x01,0x00 }, 14, AV_CODEC_ID_PRORES, NULL, 14 }, /* ProRes */
1325 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO, NULL, 15 }, /* MPEG-ES */
1326 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x04,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO, NULL, 15, D10D11Wrap }, /* SMPTE D-10 mapping */
1327 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO, NULL, 15 }, /* DV 625 25mbps */
1328 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO, NULL, 15, RawVWrap }, /* uncompressed picture */
1329 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x01,0x01 }, 15, AV_CODEC_ID_HQ_HQA },
1330 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x02,0x01 }, 15, AV_CODEC_ID_HQX },
1331 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x15,0x00,0x04,0x02,0x10,0x00,0x01 }, 16, AV_CODEC_ID_HEVC, NULL, 15 }, /* Canon XF-HEVC */
1332 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1333 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1336 /* EC ULs for intra-only formats */
1337 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1338 { { 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 */
1339 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1342 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1343 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1344 { { 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 */
1345 { { 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 */
1346 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1349 /* actual coded width for AVC-Intra to allow selecting correct SPS/PPS */
1350 static const MXFCodecUL mxf_intra_only_picture_coded_width[] = {
1351 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x01 }, 16, 1440 },
1352 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x02 }, 16, 1440 },
1353 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x03 }, 16, 1440 },
1354 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x04 }, 16, 1440 },
1355 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 0 },
1358 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1359 // sound essence container uls
1360 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE, NULL, 14, RawAWrap }, /* BWF */
1361 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2, NULL, 15 }, /* MPEG-ES */
1362 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE, NULL, 13 }, /* D-10 Mapping 50Mbps PAL Extended Template */
1363 { { 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 */
1364 { { 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) */
1365 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1368 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1369 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0d,0x00,0x00 }, 16, AV_CODEC_ID_NONE, "vbi_smpte_436M", 11 },
1370 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, AV_CODEC_ID_NONE, "vbi_vanc_smpte_436M", 11 },
1371 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x13,0x01,0x01 }, 16, AV_CODEC_ID_TTML },
1372 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1375 static MXFWrappingScheme mxf_get_wrapping_kind(UID *essence_container_ul)
1378 const MXFCodecUL *codec_ul;
1380 codec_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1381 if (!codec_ul->uid[0])
1382 codec_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1383 if (!codec_ul->uid[0])
1384 codec_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
1385 if (!codec_ul->uid[0] || !codec_ul->wrapping_indicator_pos)
1386 return UnknownWrapped;
1388 val = (*essence_container_ul)[codec_ul->wrapping_indicator_pos];
1389 switch (codec_ul->wrapping_indicator_type) {
1394 if (val == 0x03 || val == 0x04)
1403 return FrameWrapped;
1406 return UnknownWrapped;
1409 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1411 int i, j, nb_segments = 0;
1412 MXFIndexTableSegment **unsorted_segments;
1413 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1415 /* count number of segments, allocate arrays and copy unsorted segments */
1416 for (i = 0; i < mxf->metadata_sets_count; i++)
1417 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1421 return AVERROR_INVALIDDATA;
1423 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1424 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1425 av_freep(sorted_segments);
1426 av_free(unsorted_segments);
1427 return AVERROR(ENOMEM);
1430 for (i = nb_segments = 0; i < mxf->metadata_sets_count; i++) {
1431 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
1432 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1433 if (s->edit_unit_byte_count || s->nb_index_entries)
1434 unsorted_segments[nb_segments++] = s;
1436 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1437 s->index_sid, s->index_start_position);
1442 av_freep(sorted_segments);
1443 av_free(unsorted_segments);
1444 return AVERROR_INVALIDDATA;
1447 *nb_sorted_segments = 0;
1449 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1450 for (i = 0; i < nb_segments; i++) {
1451 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1452 uint64_t best_index_duration = 0;
1454 for (j = 0; j < nb_segments; j++) {
1455 MXFIndexTableSegment *s = unsorted_segments[j];
1457 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1458 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1459 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1462 s->body_sid > last_body_sid ||
1463 s->body_sid == last_body_sid && s->index_sid > last_index_sid ||
1464 s->body_sid == last_body_sid && s->index_sid == last_index_sid && s->index_start_position > last_index_start) &&
1466 s->body_sid < best_body_sid ||
1467 s->body_sid == best_body_sid && s->index_sid < best_index_sid ||
1468 s->body_sid == best_body_sid && s->index_sid == best_index_sid && s->index_start_position < best_index_start ||
1469 s->body_sid == best_body_sid && s->index_sid == best_index_sid && s->index_start_position == best_index_start && s->index_duration > best_index_duration)) {
1471 best_body_sid = s->body_sid;
1472 best_index_sid = s->index_sid;
1473 best_index_start = s->index_start_position;
1474 best_index_duration = s->index_duration;
1478 /* no suitable entry found -> we're done */
1482 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1483 last_body_sid = best_body_sid;
1484 last_index_sid = best_index_sid;
1485 last_index_start = best_index_start;
1488 av_free(unsorted_segments);
1494 * Computes the absolute file offset of the given essence container offset
1496 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out, MXFPartition **partition_out)
1498 MXFPartition *last_p = NULL;
1502 return AVERROR(EINVAL);
1505 b = mxf->partitions_count;
1508 m0 = m = (a + b) >> 1;
1510 while (m < b && mxf->partitions[m].body_sid != body_sid)
1513 if (m < b && mxf->partitions[m].body_offset <= offset)
1520 last_p = &mxf->partitions[a];
1522 if (last_p && (!last_p->essence_length || last_p->essence_length > (offset - last_p->body_offset))) {
1523 *offset_out = last_p->essence_offset + (offset - last_p->body_offset);
1525 *partition_out = last_p;
1529 av_log(mxf->fc, AV_LOG_ERROR,
1530 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1533 return AVERROR_INVALIDDATA;
1537 * Returns the end position of the essence container with given BodySID, or zero if unknown
1539 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1544 for (x = 0; x < mxf->partitions_count; x++) {
1545 MXFPartition *p = &mxf->partitions[x];
1547 if (p->body_sid != body_sid)
1550 if (!p->essence_length)
1553 ret = p->essence_offset + p->essence_length;
1559 /* EditUnit -> absolute offset */
1560 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, AVRational edit_rate, int64_t *edit_unit_out, int64_t *offset_out, MXFPartition **partition_out, int nag)
1563 int64_t offset_temp = 0;
1565 edit_unit = av_rescale_q(edit_unit, index_table->segments[0]->index_edit_rate, edit_rate);
1567 for (i = 0; i < index_table->nb_segments; i++) {
1568 MXFIndexTableSegment *s = index_table->segments[i];
1570 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1572 if (edit_unit < s->index_start_position + s->index_duration) {
1573 int64_t index = edit_unit - s->index_start_position;
1575 if (s->edit_unit_byte_count)
1576 offset_temp += s->edit_unit_byte_count * index;
1578 if (s->nb_index_entries == 2 * s->index_duration + 1)
1579 index *= 2; /* Avid index */
1581 if (index < 0 || index >= s->nb_index_entries) {
1582 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1583 index_table->index_sid, s->index_start_position);
1584 return AVERROR_INVALIDDATA;
1587 offset_temp = s->stream_offset_entries[index];
1591 *edit_unit_out = av_rescale_q(edit_unit, edit_rate, s->index_edit_rate);
1593 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out);
1595 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1596 offset_temp += s->edit_unit_byte_count * s->index_duration;
1601 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);
1603 return AVERROR_INVALIDDATA;
1606 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1609 int8_t max_temporal_offset = -128;
1612 /* first compute how many entries we have */
1613 for (i = 0; i < index_table->nb_segments; i++) {
1614 MXFIndexTableSegment *s = index_table->segments[i];
1616 if (!s->nb_index_entries) {
1617 index_table->nb_ptses = 0;
1618 return 0; /* no TemporalOffsets */
1621 if (s->index_duration > INT_MAX - index_table->nb_ptses) {
1622 index_table->nb_ptses = 0;
1623 av_log(mxf->fc, AV_LOG_ERROR, "ignoring IndexSID %d, duration is too large\n", s->index_sid);
1627 index_table->nb_ptses += s->index_duration;
1630 /* paranoid check */
1631 if (index_table->nb_ptses <= 0)
1634 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1635 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1636 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1637 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1638 av_freep(&index_table->ptses);
1639 av_freep(&index_table->fake_index);
1640 av_freep(&index_table->offsets);
1641 return AVERROR(ENOMEM);
1644 /* we may have a few bad TemporalOffsets
1645 * make sure the corresponding PTSes don't have the bogus value 0 */
1646 for (x = 0; x < index_table->nb_ptses; x++)
1647 index_table->ptses[x] = AV_NOPTS_VALUE;
1661 * We want to transform it into this:
1672 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1673 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1674 * The latter makes DTS <= PTS.
1676 for (i = x = 0; i < index_table->nb_segments; i++) {
1677 MXFIndexTableSegment *s = index_table->segments[i];
1678 int index_delta = 1;
1679 int n = s->nb_index_entries;
1681 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1682 index_delta = 2; /* Avid index */
1683 /* ignore the last entry - it's the size of the essence container */
1687 for (j = 0; j < n; j += index_delta, x++) {
1688 int offset = s->temporal_offset_entries[j] / index_delta;
1689 int index = x + offset;
1691 if (x >= index_table->nb_ptses) {
1692 av_log(mxf->fc, AV_LOG_ERROR,
1693 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1694 s->nb_index_entries, s->index_duration);
1698 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1700 if (index < 0 || index >= index_table->nb_ptses) {
1701 av_log(mxf->fc, AV_LOG_ERROR,
1702 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1707 index_table->offsets[x] = offset;
1708 index_table->ptses[index] = x;
1709 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1713 /* calculate the fake index table in display order */
1714 for (x = 0; x < index_table->nb_ptses; x++) {
1715 index_table->fake_index[x].timestamp = x;
1716 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1717 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1721 index_table->first_dts = -max_temporal_offset;
1727 * Sorts and collects index table segments into index tables.
1728 * Also computes PTSes if possible.
1730 static int mxf_compute_index_tables(MXFContext *mxf)
1732 int i, j, k, ret, nb_sorted_segments;
1733 MXFIndexTableSegment **sorted_segments = NULL;
1735 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1736 nb_sorted_segments <= 0) {
1737 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1741 /* sanity check and count unique BodySIDs/IndexSIDs */
1742 for (i = 0; i < nb_sorted_segments; i++) {
1743 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1744 mxf->nb_index_tables++;
1745 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1746 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1747 ret = AVERROR_INVALIDDATA;
1748 goto finish_decoding_index;
1752 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1753 sizeof(*mxf->index_tables));
1754 if (!mxf->index_tables) {
1755 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1756 ret = AVERROR(ENOMEM);
1757 goto finish_decoding_index;
1760 /* distribute sorted segments to index tables */
1761 for (i = j = 0; i < nb_sorted_segments; i++) {
1762 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1767 mxf->index_tables[j].nb_segments++;
1770 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1771 MXFIndexTable *t = &mxf->index_tables[j];
1772 MXFTrack *mxf_track = NULL;
1774 t->segments = av_mallocz_array(t->nb_segments,
1775 sizeof(*t->segments));
1778 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1779 " pointer array\n");
1780 ret = AVERROR(ENOMEM);
1781 goto finish_decoding_index;
1784 if (sorted_segments[i]->index_start_position)
1785 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1786 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1788 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1789 t->index_sid = sorted_segments[i]->index_sid;
1790 t->body_sid = sorted_segments[i]->body_sid;
1792 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1793 goto finish_decoding_index;
1795 for (k = 0; k < mxf->fc->nb_streams; k++) {
1796 MXFTrack *track = mxf->fc->streams[k]->priv_data;
1797 if (track && track->index_sid == t->index_sid) {
1803 /* fix zero IndexDurations */
1804 for (k = 0; k < t->nb_segments; k++) {
1805 if (!t->segments[k]->index_edit_rate.num || !t->segments[k]->index_edit_rate.den) {
1806 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has invalid IndexEditRate\n",
1809 t->segments[k]->index_edit_rate = mxf_track->edit_rate;
1812 if (t->segments[k]->index_duration)
1815 if (t->nb_segments > 1)
1816 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1820 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1824 /* assume the first stream's duration is reasonable
1825 * leave index_duration = 0 on further segments in case we have any (unlikely)
1827 t->segments[k]->index_duration = mxf_track->original_duration;
1833 finish_decoding_index:
1834 av_free(sorted_segments);
1838 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1840 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1841 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1842 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1843 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1846 static int mxf_uid_to_str(UID uid, char **str)
1850 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1852 return AVERROR(ENOMEM);
1853 for (i = 0; i < sizeof(UID); i++) {
1854 snprintf(p, 2 + 1, "%.2x", uid[i]);
1856 if (i == 3 || i == 5 || i == 7 || i == 9) {
1857 snprintf(p, 1 + 1, "-");
1864 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1868 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1870 return AVERROR(ENOMEM);
1871 snprintf(p, 2 + 1, "0x");
1873 for (i = 0; i < sizeof(UID); i++) {
1874 snprintf(p, 2 + 1, "%.2X", ul[i]);
1878 for (i = 0; i < sizeof(UID); i++) {
1879 snprintf(p, 2 + 1, "%.2X", uid[i]);
1885 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1891 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1893 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1897 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1899 char buf[AV_TIMECODE_STR_SIZE];
1900 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1905 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1907 MXFStructuralComponent *component = NULL;
1908 MXFPulldownComponent *pulldown = NULL;
1910 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1914 switch (component->type) {
1915 case TimecodeComponent:
1916 return (MXFTimecodeComponent*)component;
1917 case PulldownComponent: /* timcode component may be located on a pulldown component */
1918 pulldown = (MXFPulldownComponent*)component;
1919 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1926 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_ul, UID package_uid)
1928 MXFPackage *package = NULL;
1931 for (i = 0; i < mxf->packages_count; i++) {
1932 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1936 if (!memcmp(package->package_ul, package_ul, 16) && !memcmp(package->package_uid, package_uid, 16))
1942 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1944 MXFDescriptor *sub_descriptor = NULL;
1950 if (descriptor->type == MultipleDescriptor) {
1951 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1952 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1954 if (!sub_descriptor) {
1955 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1958 if (sub_descriptor->linked_track_id == track_id) {
1959 return sub_descriptor;
1962 } else if (descriptor->type == Descriptor)
1968 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1970 MXFStructuralComponent *component = NULL;
1971 MXFPackage *package = NULL;
1972 MXFDescriptor *descriptor = NULL;
1975 if (!essence_group || !essence_group->structural_components_count)
1978 /* essence groups contains multiple representations of the same media,
1979 this return the first components with a valid Descriptor typically index 0 */
1980 for (i =0; i < essence_group->structural_components_count; i++){
1981 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1985 if (!(package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid)))
1988 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1995 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1997 MXFStructuralComponent *component = NULL;
1999 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
2002 switch (component->type) {
2006 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
2013 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
2015 MXFTaggedValue *tag;
2019 for (i = 0; i < package->comment_count; i++) {
2020 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
2021 if (!tag || !tag->name || !tag->value)
2024 size = strlen(tag->name) + 8 + 1;
2025 key = av_mallocz(size);
2027 return AVERROR(ENOMEM);
2029 snprintf(key, size, "comment_%s", tag->name);
2030 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
2035 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
2037 MXFPackage *physical_package = NULL;
2038 MXFTrack *physical_track = NULL;
2039 MXFStructuralComponent *sourceclip = NULL;
2040 MXFTimecodeComponent *mxf_tc = NULL;
2044 int64_t start_position;
2046 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
2047 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
2051 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_ul, sourceclip->source_package_uid)))
2054 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
2056 /* the name of physical source package is name of the reel or tape */
2057 if (physical_package->name && physical_package->name[0])
2058 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
2060 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
2061 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
2063 for (j = 0; j < physical_package->tracks_count; j++) {
2064 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
2065 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2069 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
2070 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2074 if (physical_track->edit_rate.num <= 0 ||
2075 physical_track->edit_rate.den <= 0) {
2076 av_log(mxf->fc, AV_LOG_WARNING,
2077 "Invalid edit rate (%d/%d) found on structural"
2078 " component #%d, defaulting to 25/1\n",
2079 physical_track->edit_rate.num,
2080 physical_track->edit_rate.den, i);
2081 physical_track->edit_rate = (AVRational){25, 1};
2084 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
2085 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
2088 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2089 /* scale sourceclip start_position to match physical track edit rate */
2090 start_position = av_rescale_q(sourceclip->start_position,
2091 physical_track->edit_rate,
2092 source_track->edit_rate);
2094 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
2095 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
2105 static int mxf_add_metadata_stream(MXFContext *mxf, MXFTrack *track)
2107 MXFStructuralComponent *component = NULL;
2108 const MXFCodecUL *codec_ul = NULL;
2109 MXFPackage tmp_package;
2113 for (j = 0; j < track->sequence->structural_components_count; j++) {
2114 component = mxf_resolve_sourceclip(mxf, &track->sequence->structural_components_refs[j]);
2122 st = avformat_new_stream(mxf->fc, NULL);
2124 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate metadata stream\n");
2125 return AVERROR(ENOMEM);
2128 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2129 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2130 st->id = track->track_id;
2132 memcpy(&tmp_package.package_ul, component->source_package_ul, 16);
2133 memcpy(&tmp_package.package_uid, component->source_package_uid, 16);
2134 mxf_add_umid_metadata(&st->metadata, "file_package_umid", &tmp_package);
2135 if (track->name && track->name[0])
2136 av_dict_set(&st->metadata, "track_name", track->name, 0);
2138 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &track->sequence->data_definition_ul);
2139 av_dict_set(&st->metadata, "data_type", av_get_media_type_string(codec_ul->id), 0);
2143 static int mxf_parse_structural_metadata(MXFContext *mxf)
2145 MXFPackage *material_package = NULL;
2148 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
2149 /* TODO: handle multiple material packages (OP3x) */
2150 for (i = 0; i < mxf->packages_count; i++) {
2151 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
2152 if (material_package) break;
2154 if (!material_package) {
2155 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
2156 return AVERROR_INVALIDDATA;
2159 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
2160 if (material_package->name && material_package->name[0])
2161 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
2162 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
2164 for (i = 0; i < material_package->tracks_count; i++) {
2165 MXFPackage *source_package = NULL;
2166 MXFTrack *material_track = NULL;
2167 MXFTrack *source_track = NULL;
2168 MXFTrack *temp_track = NULL;
2169 MXFDescriptor *descriptor = NULL;
2170 MXFStructuralComponent *component = NULL;
2171 MXFTimecodeComponent *mxf_tc = NULL;
2172 UID *essence_container_ul = NULL;
2173 const MXFCodecUL *codec_ul = NULL;
2174 const MXFCodecUL *container_ul = NULL;
2175 const MXFCodecUL *pix_fmt_ul = NULL;
2180 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
2181 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
2185 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
2186 mxf_tc = (MXFTimecodeComponent*)component;
2187 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2188 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2189 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2193 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
2194 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
2198 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2199 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
2203 mxf_tc = (MXFTimecodeComponent*)component;
2204 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2205 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2206 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2211 /* TODO: handle multiple source clips, only finds first valid source clip */
2212 if(material_track->sequence->structural_components_count > 1)
2213 av_log(mxf->fc, AV_LOG_WARNING, "material track %d: has %d components\n",
2214 material_track->track_id, material_track->sequence->structural_components_count);
2216 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2217 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
2221 source_package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid);
2222 if (!source_package) {
2223 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
2226 for (k = 0; k < source_package->tracks_count; k++) {
2227 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
2228 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2229 ret = AVERROR_INVALIDDATA;
2232 if (temp_track->track_id == component->source_track_id) {
2233 source_track = temp_track;
2237 if (!source_track) {
2238 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
2242 for (k = 0; k < mxf->essence_container_data_count; k++) {
2243 MXFEssenceContainerData *essence_data;
2245 if (!(essence_data = mxf_resolve_strong_ref(mxf, &mxf->essence_container_data_refs[k], EssenceContainerData))) {
2246 av_log(mxf->fc, AV_LOG_TRACE, "could not resolve essence container data strong ref\n");
2249 if (!memcmp(component->source_package_ul, essence_data->package_ul, sizeof(UID)) && !memcmp(component->source_package_uid, essence_data->package_uid, sizeof(UID))) {
2250 source_track->body_sid = essence_data->body_sid;
2251 source_track->index_sid = essence_data->index_sid;
2256 if(source_track && component)
2259 if (!source_track || !component || !source_package) {
2260 if((ret = mxf_add_metadata_stream(mxf, material_track)))
2265 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
2266 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2267 ret = AVERROR_INVALIDDATA;
2271 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
2272 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
2273 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
2274 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
2278 st = avformat_new_stream(mxf->fc, NULL);
2280 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
2281 ret = AVERROR(ENOMEM);
2284 st->id = material_track->track_id;
2285 st->priv_data = source_track;
2287 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
2288 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
2290 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
2291 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
2292 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
2293 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
2295 source_track->original_duration = st->duration = component->duration;
2297 if (st->duration == -1)
2298 st->duration = AV_NOPTS_VALUE;
2299 st->start_time = component->start_position;
2300 if (material_track->edit_rate.num <= 0 ||
2301 material_track->edit_rate.den <= 0) {
2302 av_log(mxf->fc, AV_LOG_WARNING,
2303 "Invalid edit rate (%d/%d) found on stream #%d, "
2304 "defaulting to 25/1\n",
2305 material_track->edit_rate.num,
2306 material_track->edit_rate.den, st->index);
2307 material_track->edit_rate = (AVRational){25, 1};
2309 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
2311 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
2312 * the former is accessible via st->priv_data */
2313 source_track->edit_rate = material_track->edit_rate;
2315 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
2316 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
2317 st->codecpar->codec_type = codec_ul->id;
2320 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
2323 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
2324 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
2325 essence_container_ul = &descriptor->essence_container_ul;
2326 source_track->wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_kind(essence_container_ul);
2327 if (source_track->wrapping == UnknownWrapped)
2328 av_log(mxf->fc, AV_LOG_INFO, "wrapping of stream %d is unknown\n", st->index);
2329 /* HACK: replacing the original key with mxf_encrypted_essence_container
2330 * is not allowed according to s429-6, try to find correct information anyway */
2331 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
2332 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
2333 for (k = 0; k < mxf->metadata_sets_count; k++) {
2334 MXFMetadataSet *metadata = mxf->metadata_sets[k];
2335 if (metadata->type == CryptoContext) {
2336 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
2342 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
2343 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
2344 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2345 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
2346 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
2347 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2350 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
2351 avcodec_get_name(st->codecpar->codec_id));
2352 for (k = 0; k < 16; k++) {
2353 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
2354 descriptor->essence_codec_ul[k]);
2355 if (!(k+1 & 19) || k == 5)
2356 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
2358 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2360 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2361 if (source_package->name && source_package->name[0])
2362 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2363 if (material_track->name && material_track->name[0])
2364 av_dict_set(&st->metadata, "track_name", material_track->name, 0);
2366 mxf_parse_physical_source_package(mxf, source_track, st);
2368 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2369 source_track->intra_only = mxf_is_intra_only(descriptor);
2370 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2371 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2372 st->codecpar->codec_id = container_ul->id;
2373 st->codecpar->width = descriptor->width;
2374 st->codecpar->height = descriptor->height; /* Field height, not frame height */
2375 switch (descriptor->frame_layout) {
2377 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2380 /* Every other line is stored and needs to be duplicated. */
2381 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2382 break; /* The correct thing to do here is fall through, but by breaking we might be
2383 able to decode some streams at half the vertical resolution, rather than not al all.
2384 It's also for compatibility with the old behavior. */
2387 case SegmentedFrame:
2388 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2389 case SeparateFields:
2390 av_log(mxf->fc, AV_LOG_DEBUG, "video_line_map: (%d, %d), field_dominance: %d\n",
2391 descriptor->video_line_map[0], descriptor->video_line_map[1],
2392 descriptor->field_dominance);
2393 if ((descriptor->video_line_map[0] > 0) && (descriptor->video_line_map[1] > 0)) {
2394 /* Detect coded field order from VideoLineMap:
2395 * (even, even) => bottom field coded first
2396 * (even, odd) => top field coded first
2397 * (odd, even) => top field coded first
2398 * (odd, odd) => bottom field coded first
2400 if ((descriptor->video_line_map[0] + descriptor->video_line_map[1]) % 2) {
2401 switch (descriptor->field_dominance) {
2402 case MXF_FIELD_DOMINANCE_DEFAULT:
2403 case MXF_FIELD_DOMINANCE_FF:
2404 st->codecpar->field_order = AV_FIELD_TT;
2406 case MXF_FIELD_DOMINANCE_FL:
2407 st->codecpar->field_order = AV_FIELD_TB;
2410 avpriv_request_sample(mxf->fc,
2411 "Field dominance %d support",
2412 descriptor->field_dominance);
2415 switch (descriptor->field_dominance) {
2416 case MXF_FIELD_DOMINANCE_DEFAULT:
2417 case MXF_FIELD_DOMINANCE_FF:
2418 st->codecpar->field_order = AV_FIELD_BB;
2420 case MXF_FIELD_DOMINANCE_FL:
2421 st->codecpar->field_order = AV_FIELD_BT;
2424 avpriv_request_sample(mxf->fc,
2425 "Field dominance %d support",
2426 descriptor->field_dominance);
2430 /* Turn field height into frame height. */
2431 st->codecpar->height *= 2;
2434 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2437 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
2438 switch (descriptor->essence_codec_ul[14]) {
2439 case 1: st->codecpar->codec_tag = MKTAG('a','p','c','o'); break;
2440 case 2: st->codecpar->codec_tag = MKTAG('a','p','c','s'); break;
2441 case 3: st->codecpar->codec_tag = MKTAG('a','p','c','n'); break;
2442 case 4: st->codecpar->codec_tag = MKTAG('a','p','c','h'); break;
2443 case 5: st->codecpar->codec_tag = MKTAG('a','p','4','h'); break;
2444 case 6: st->codecpar->codec_tag = MKTAG('a','p','4','x'); break;
2448 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
2449 st->codecpar->format = descriptor->pix_fmt;
2450 if (st->codecpar->format == AV_PIX_FMT_NONE) {
2451 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2452 &descriptor->essence_codec_ul);
2453 st->codecpar->format = (enum AVPixelFormat)pix_fmt_ul->id;
2454 if (st->codecpar->format== AV_PIX_FMT_NONE) {
2455 st->codecpar->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2456 &descriptor->essence_codec_ul)->id;
2457 if (!st->codecpar->codec_tag) {
2458 /* support files created before RP224v10 by defaulting to UYVY422
2459 if subsampling is 4:2:2 and component depth is 8-bit */
2460 if (descriptor->horiz_subsampling == 2 &&
2461 descriptor->vert_subsampling == 1 &&
2462 descriptor->component_depth == 8) {
2463 st->codecpar->format = AV_PIX_FMT_UYVY422;
2469 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2470 if (material_track->sequence->origin) {
2471 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2473 if (source_track->sequence->origin) {
2474 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2476 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2477 st->display_aspect_ratio = descriptor->aspect_ratio;
2478 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
2479 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2480 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2481 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))
2482 st->codecpar->codec_id = (enum AVCodecID)container_ul->id;
2483 st->codecpar->channels = descriptor->channels;
2485 if (descriptor->sample_rate.den > 0) {
2486 st->codecpar->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2487 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2489 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2490 "found for stream #%d, time base forced to 1/48000\n",
2491 descriptor->sample_rate.num, descriptor->sample_rate.den,
2493 avpriv_set_pts_info(st, 64, 1, 48000);
2496 /* if duration is set, rescale it from EditRate to SampleRate */
2497 if (st->duration != AV_NOPTS_VALUE)
2498 st->duration = av_rescale_q(st->duration,
2499 av_inv_q(material_track->edit_rate),
2502 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2503 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
2504 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2505 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
2506 else if (descriptor->bits_per_sample == 32)
2507 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
2508 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) {
2509 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2510 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24BE;
2511 else if (descriptor->bits_per_sample == 32)
2512 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
2513 } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
2514 st->need_parsing = AVSTREAM_PARSE_FULL;
2516 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2517 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
2518 enum AVMediaType type;
2519 container_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
2520 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2521 st->codecpar->codec_id = container_ul->id;
2522 type = avcodec_get_type(st->codecpar->codec_id);
2523 if (type == AVMEDIA_TYPE_SUBTITLE)
2524 st->codecpar->codec_type = type;
2525 if (container_ul->desc)
2526 av_dict_set(&st->metadata, "data_type", container_ul->desc, 0);
2527 if (mxf->eia608_extract &&
2528 !strcmp(container_ul->desc, "vbi_vanc_smpte_436M")) {
2529 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2530 st->codecpar->codec_id = AV_CODEC_ID_EIA_608;
2533 if (descriptor->extradata) {
2534 if (!ff_alloc_extradata(st->codecpar, descriptor->extradata_size)) {
2535 memcpy(st->codecpar->extradata, descriptor->extradata, descriptor->extradata_size);
2537 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2538 int coded_width = mxf_get_codec_ul(mxf_intra_only_picture_coded_width,
2539 &descriptor->essence_codec_ul)->id;
2541 st->codecpar->width = coded_width;
2542 ret = ff_generate_avci_extradata(st);
2546 if (st->codecpar->codec_type != AVMEDIA_TYPE_DATA && source_track->wrapping != FrameWrapped) {
2547 /* TODO: decode timestamps */
2548 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2557 static int64_t mxf_timestamp_to_int64(uint64_t timestamp)
2559 struct tm time = { 0 };
2561 time.tm_year = (timestamp >> 48) - 1900;
2562 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2563 time.tm_mday = (timestamp >> 32 & 0xFF);
2564 time.tm_hour = (timestamp >> 24 & 0xFF);
2565 time.tm_min = (timestamp >> 16 & 0xFF);
2566 time.tm_sec = (timestamp >> 8 & 0xFF);
2567 msecs = (timestamp & 0xFF) * 4;
2569 /* Clip values for legacy reasons. Maybe we should return error instead? */
2570 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2571 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2572 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2573 time.tm_min = av_clip(time.tm_min, 0, 59);
2574 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2575 msecs = av_clip(msecs, 0, 999);
2577 return (int64_t)av_timegm(&time) * 1000000 + msecs * 1000;
2580 #define SET_STR_METADATA(pb, name, str) do { \
2581 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2583 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2586 #define SET_UID_METADATA(pb, name, var, str) do { \
2587 avio_read(pb, var, 16); \
2588 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2590 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2593 #define SET_TS_METADATA(pb, name, var, str) do { \
2594 var = avio_rb64(pb); \
2595 if (var && (ret = avpriv_dict_set_timestamp(&s->metadata, name, mxf_timestamp_to_int64(var))) < 0) \
2599 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2601 MXFContext *mxf = arg;
2602 AVFormatContext *s = mxf->fc;
2609 SET_STR_METADATA(pb, "company_name", str);
2612 SET_STR_METADATA(pb, "product_name", str);
2615 SET_STR_METADATA(pb, "product_version", str);
2618 SET_UID_METADATA(pb, "product_uid", uid, str);
2621 SET_TS_METADATA(pb, "modification_date", ts, str);
2624 SET_STR_METADATA(pb, "application_platform", str);
2627 SET_UID_METADATA(pb, "generation_uid", uid, str);
2630 SET_UID_METADATA(pb, "uid", uid, str);
2636 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2638 MXFContext *mxf = arg;
2639 AVFormatContext *s = mxf->fc;
2643 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2644 SET_STR_METADATA(pb, "project_name", str);
2649 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2650 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2651 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2652 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2653 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2654 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2655 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2656 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2657 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2658 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2659 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2660 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2661 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2662 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2663 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2664 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2665 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2666 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2667 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2668 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2669 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2670 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2671 { { 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 */
2672 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2673 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2674 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2675 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2676 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2677 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5b,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VBI - SMPTE 436M */
2678 { { 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 */
2679 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2680 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x64,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* DC Timed Text Descriptor */
2681 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2682 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2683 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2684 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2685 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2686 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2687 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x23,0x00 }, mxf_read_essence_container_data, sizeof(MXFEssenceContainerData), EssenceContainerData },
2688 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2691 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2694 case MultipleDescriptor:
2696 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2697 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2705 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2707 AVIOContext *pb = mxf->fc->pb;
2708 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2709 uint64_t klv_end = avio_tell(pb) + klv->length;
2712 return AVERROR(ENOMEM);
2713 mxf_metadataset_init(ctx, type);
2714 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2716 int tag = avio_rb16(pb);
2717 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2718 uint64_t next = avio_tell(pb) + size;
2721 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2722 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2723 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2726 if (tag > 0x7FFF) { /* dynamic tag */
2728 for (i = 0; i < mxf->local_tags_count; i++) {
2729 int local_tag = AV_RB16(mxf->local_tags+i*18);
2730 if (local_tag == tag) {
2731 memcpy(uid, mxf->local_tags+i*18+2, 16);
2732 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2733 PRINT_KEY(mxf->fc, "uid", uid);
2737 if (ctx_size && tag == 0x3C0A) {
2738 avio_read(pb, ctx->uid, 16);
2739 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2741 mxf_free_metadataset(&ctx, 1);
2745 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2746 * it extending past the end of the KLV though (zzuf5.mxf). */
2747 if (avio_tell(pb) > klv_end) {
2750 mxf_free_metadataset(&ctx, 1);
2753 av_log(mxf->fc, AV_LOG_ERROR,
2754 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2756 return AVERROR_INVALIDDATA;
2757 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2758 avio_seek(pb, next, SEEK_SET);
2760 if (ctx_size) ctx->type = type;
2761 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2765 * Matches any partition pack key, in other words:
2769 * @return non-zero if the key is a partition pack key, zero otherwise
2771 static int mxf_is_partition_pack_key(UID key)
2773 //NOTE: this is a little lax since it doesn't constraint key[14]
2774 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2775 key[13] >= 2 && key[13] <= 4;
2779 * Parses a metadata KLV
2780 * @return <0 on error, 0 otherwise
2782 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2783 int ctx_size, enum MXFMetadataSetType type)
2785 AVFormatContext *s = mxf->fc;
2787 if (klv.key[5] == 0x53) {
2788 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2790 uint64_t next = avio_tell(s->pb) + klv.length;
2791 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2793 /* only seek forward, else this can loop for a long time */
2794 if (avio_tell(s->pb) > next) {
2795 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2797 return AVERROR_INVALIDDATA;
2800 avio_seek(s->pb, next, SEEK_SET);
2803 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2810 * Seeks to the previous partition and parses it, if possible
2811 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2813 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2815 AVIOContext *pb = mxf->fc->pb;
2817 int64_t current_partition_ofs;
2820 if (!mxf->current_partition ||
2821 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2822 return 0; /* we've parsed all partitions */
2824 /* seek to previous partition */
2825 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2826 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2827 mxf->current_partition = NULL;
2829 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2831 /* Make sure this is actually a PartitionPack, and if so parse it.
2834 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2835 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2839 if (!mxf_is_partition_pack_key(klv.key)) {
2840 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2841 return AVERROR_INVALIDDATA;
2844 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2845 * can point to just before the current partition, causing klv_read_packet()
2846 * to sync back up to it. See deadlock3.mxf
2848 if (klv.offset >= current_partition_ofs) {
2849 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2850 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2851 return AVERROR_INVALIDDATA;
2854 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2861 * Called when essence is encountered
2862 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2864 static int mxf_parse_handle_essence(MXFContext *mxf)
2866 AVIOContext *pb = mxf->fc->pb;
2869 if (mxf->parsing_backward) {
2870 return mxf_seek_to_previous_partition(mxf);
2872 if (!mxf->footer_partition) {
2873 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2877 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2879 /* remember where we were so we don't end up seeking further back than this */
2880 mxf->last_forward_tell = avio_tell(pb);
2882 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2883 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2887 /* seek to FooterPartition and parse backward */
2888 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2889 av_log(mxf->fc, AV_LOG_ERROR,
2890 "failed to seek to FooterPartition @ 0x%" PRIx64
2891 " (%"PRId64") - partial file?\n",
2892 mxf->run_in + mxf->footer_partition, ret);
2896 mxf->current_partition = NULL;
2897 mxf->parsing_backward = 1;
2904 * Called when the next partition or EOF is encountered
2905 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2907 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2909 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2912 static MXFWrappingScheme mxf_get_wrapping_by_body_sid(AVFormatContext *s, int body_sid)
2914 for (int i = 0; i < s->nb_streams; i++) {
2915 MXFTrack *track = s->streams[i]->priv_data;
2916 if (track && track->body_sid == body_sid && track->wrapping != UnknownWrapped)
2917 return track->wrapping;
2919 return UnknownWrapped;
2923 * Figures out the proper offset and length of the essence container in each partition
2925 static void mxf_compute_essence_containers(AVFormatContext *s)
2927 MXFContext *mxf = s->priv_data;
2930 for (x = 0; x < mxf->partitions_count; x++) {
2931 MXFPartition *p = &mxf->partitions[x];
2932 MXFWrappingScheme wrapping;
2935 continue; /* BodySID == 0 -> no essence */
2937 /* for clip wrapped essences we point essence_offset after the KL (usually klv.offset + 20 or 25)
2938 * otherwise we point essence_offset at the key of the first essence KLV.
2941 wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_by_body_sid(s, p->body_sid);
2943 if (wrapping == ClipWrapped) {
2944 p->essence_offset = p->first_essence_klv.next_klv - p->first_essence_klv.length;
2945 p->essence_length = p->first_essence_klv.length;
2947 p->essence_offset = p->first_essence_klv.offset;
2949 /* essence container spans to the next partition */
2950 if (x < mxf->partitions_count - 1)
2951 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2953 if (p->essence_length < 0) {
2954 /* next ThisPartition < essence_offset */
2955 p->essence_length = 0;
2956 av_log(mxf->fc, AV_LOG_ERROR,
2957 "partition %i: bad ThisPartition = %"PRIX64"\n",
2958 x+1, mxf->partitions[x+1].this_partition);
2964 static int is_pcm(enum AVCodecID codec_id)
2966 /* we only care about "normal" PCM codecs until we get samples */
2967 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2970 static MXFIndexTable *mxf_find_index_table(MXFContext *mxf, int index_sid)
2973 for (i = 0; i < mxf->nb_index_tables; i++)
2974 if (mxf->index_tables[i].index_sid == index_sid)
2975 return &mxf->index_tables[i];
2980 * Deal with the case where for some audio atoms EditUnitByteCount is
2981 * very small (2, 4..). In those cases we should read more than one
2982 * sample per call to mxf_read_packet().
2984 static void mxf_compute_edit_units_per_packet(MXFContext *mxf, AVStream *st)
2986 MXFTrack *track = st->priv_data;
2991 track->edit_units_per_packet = 1;
2992 if (track->wrapping != ClipWrapped)
2995 t = mxf_find_index_table(mxf, track->index_sid);
2997 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2998 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
2999 !is_pcm(st->codecpar->codec_id) ||
3001 t->nb_segments != 1 ||
3002 t->segments[0]->edit_unit_byte_count >= 32)
3005 /* arbitrarily default to 48 kHz PAL audio frame size */
3006 /* TODO: We could compute this from the ratio between the audio
3007 * and video edit rates for 48 kHz NTSC we could use the
3008 * 1802-1802-1802-1802-1801 pattern. */
3009 track->edit_units_per_packet = FFMAX(1, track->edit_rate.num / track->edit_rate.den / 25);
3013 * Deal with the case where ClipWrapped essences does not have any IndexTableSegments.
3015 static int mxf_handle_missing_index_segment(MXFContext *mxf, AVStream *st)
3017 MXFTrack *track = st->priv_data;
3018 MXFIndexTableSegment *segment = NULL;
3019 MXFPartition *p = NULL;
3020 int essence_partition_count = 0;
3021 int edit_unit_byte_count = 0;
3024 if (!track || track->wrapping != ClipWrapped)
3027 /* check if track already has an IndexTableSegment */
3028 for (i = 0; i < mxf->metadata_sets_count; i++) {
3029 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
3030 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
3031 if (s->body_sid == track->body_sid)
3036 /* find the essence partition */
3037 for (i = 0; i < mxf->partitions_count; i++) {
3038 /* BodySID == 0 -> no essence */
3039 if (mxf->partitions[i].body_sid != track->body_sid)
3042 p = &mxf->partitions[i];
3043 essence_partition_count++;
3046 /* only handle files with a single essence partition */
3047 if (essence_partition_count != 1)
3050 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && is_pcm(st->codecpar->codec_id)) {
3051 edit_unit_byte_count = (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->channels) >> 3;
3052 } else if (st->duration > 0 && p->first_essence_klv.length > 0 && p->first_essence_klv.length % st->duration == 0) {
3053 edit_unit_byte_count = p->first_essence_klv.length / st->duration;
3056 if (edit_unit_byte_count <= 0)
3059 av_log(mxf->fc, AV_LOG_WARNING, "guessing index for stream %d using edit unit byte count %d\n", st->index, edit_unit_byte_count);
3061 if (!(segment = av_mallocz(sizeof(*segment))))
3062 return AVERROR(ENOMEM);
3064 if ((ret = mxf_add_metadata_set(mxf, segment))) {
3065 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
3069 /* Make sure we have nonzero unique index_sid, body_sid will be ok, because
3070 * using the same SID for index is forbidden in MXF. */
3071 if (!track->index_sid)
3072 track->index_sid = track->body_sid;
3074 segment->type = IndexTableSegment;
3075 /* stream will be treated as small EditUnitByteCount */
3076 segment->edit_unit_byte_count = edit_unit_byte_count;
3077 segment->index_start_position = 0;
3078 segment->index_duration = st->duration;
3079 segment->index_edit_rate = av_inv_q(st->time_base);
3080 segment->index_sid = track->index_sid;
3081 segment->body_sid = p->body_sid;
3085 static void mxf_read_random_index_pack(AVFormatContext *s)
3087 MXFContext *mxf = s->priv_data;
3089 int64_t file_size, max_rip_length, min_rip_length;
3092 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
3095 file_size = avio_size(s->pb);
3097 /* S377m says to check the RIP length for "silly" values, without defining "silly".
3098 * The limit below assumes a file with nothing but partition packs and a RIP.
3099 * Before changing this, consider that a muxer may place each sample in its own partition.
3101 * 105 is the size of the smallest possible PartitionPack
3102 * 12 is the size of each RIP entry
3103 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
3105 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
3106 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
3108 /* We're only interested in RIPs with at least two entries.. */
3109 min_rip_length = 16+1+24+4;
3111 /* See S377m section 11 */
3112 avio_seek(s->pb, file_size - 4, SEEK_SET);
3113 length = avio_rb32(s->pb);
3115 if (length < min_rip_length || length > max_rip_length)
3117 avio_seek(s->pb, file_size - length, SEEK_SET);
3118 if (klv_read_packet(&klv, s->pb) < 0 ||
3119 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
3120 klv.length != length - 20)
3123 avio_skip(s->pb, klv.length - 12);
3124 mxf->footer_partition = avio_rb64(s->pb);
3127 if (mxf->run_in + mxf->footer_partition >= file_size) {
3128 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
3129 mxf->footer_partition = 0;
3133 avio_seek(s->pb, mxf->run_in, SEEK_SET);
3136 static int mxf_read_header(AVFormatContext *s)
3138 MXFContext *mxf = s->priv_data;
3140 int64_t essence_offset = 0;
3143 mxf->last_forward_tell = INT64_MAX;
3145 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
3146 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
3147 return AVERROR_INVALIDDATA;
3149 avio_seek(s->pb, -14, SEEK_CUR);
3151 mxf->run_in = avio_tell(s->pb);
3153 mxf_read_random_index_pack(s);
3155 while (!avio_feof(s->pb)) {
3156 const MXFMetadataReadTableEntry *metadata;
3158 if (klv_read_packet(&klv, s->pb) < 0) {
3159 /* EOF - seek to previous partition or stop */
3160 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3166 PRINT_KEY(s, "read header", klv.key);
3167 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3168 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
3169 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3170 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3171 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
3172 IS_KLV_KEY(klv.key, mxf_system_item_key_cp) ||
3173 IS_KLV_KEY(klv.key, mxf_system_item_key_gc)) {
3175 if (!mxf->current_partition) {
3176 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
3177 return AVERROR_INVALIDDATA;
3180 if (!mxf->current_partition->first_essence_klv.offset)
3181 mxf->current_partition->first_essence_klv = klv;
3183 if (!essence_offset)
3184 essence_offset = klv.offset;
3186 /* seek to footer, previous partition or stop */
3187 if (mxf_parse_handle_essence(mxf) <= 0)
3190 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
3191 /* next partition pack - keep going, seek to previous partition or stop */
3192 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3194 else if (mxf->parsing_backward)
3196 /* we're still parsing forward. proceed to parsing this partition pack */
3199 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
3200 if (IS_KLV_KEY(klv.key, metadata->key)) {
3201 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
3206 if (!metadata->read) {
3207 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
3209 avio_skip(s->pb, klv.length);
3212 /* FIXME avoid seek */
3213 if (!essence_offset) {
3214 av_log(s, AV_LOG_ERROR, "no essence\n");
3215 ret = AVERROR_INVALIDDATA;
3218 avio_seek(s->pb, essence_offset, SEEK_SET);
3220 /* we need to do this before computing the index tables
3221 * to be able to fill in zero IndexDurations with st->duration */
3222 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
3225 for (int i = 0; i < s->nb_streams; i++)
3226 mxf_handle_missing_index_segment(mxf, s->streams[i]);
3228 if ((ret = mxf_compute_index_tables(mxf)) < 0)
3231 if (mxf->nb_index_tables > 1) {
3232 /* TODO: look up which IndexSID to use via EssenceContainerData */
3233 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
3234 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
3235 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom && (s->error_recognition & AV_EF_EXPLODE)) {
3236 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
3237 ret = AVERROR_INVALIDDATA;
3241 mxf_compute_essence_containers(s);
3243 for (int i = 0; i < s->nb_streams; i++)
3244 mxf_compute_edit_units_per_packet(mxf, s->streams[i]);
3253 /* Get the edit unit of the next packet from current_offset in a track. The returned edit unit can be original_duration as well! */
3254 static int mxf_get_next_track_edit_unit(MXFContext *mxf, MXFTrack *track, int64_t current_offset, int64_t *edit_unit_out)
3256 int64_t a, b, m, offset;
3257 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3259 if (!t || track->original_duration <= 0)
3263 b = track->original_duration;
3267 if (mxf_edit_unit_absolute_offset(mxf, t, m, track->edit_rate, NULL, &offset, NULL, 0) < 0)
3269 if (offset < current_offset)
3280 static int64_t mxf_compute_sample_count(MXFContext *mxf, AVStream *st,
3283 int i, total = 0, size = 0;
3284 MXFTrack *track = st->priv_data;
3285 AVRational time_base = av_inv_q(track->edit_rate);
3286 AVRational sample_rate = av_inv_q(st->time_base);
3287 const MXFSamplesPerFrame *spf = NULL;
3288 int64_t sample_count;
3290 // For non-audio sample_count equals current edit unit
3291 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
3294 if ((sample_rate.num / sample_rate.den) == 48000)
3295 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
3297 int remainder = (sample_rate.num * time_base.num) %
3298 (time_base.den * sample_rate.den);
3300 av_log(mxf->fc, AV_LOG_WARNING,
3301 "seeking detected on stream #%d with time base (%d/%d) and "
3302 "sample rate (%d/%d), audio pts won't be accurate.\n",
3303 st->index, time_base.num, time_base.den,
3304 sample_rate.num, sample_rate.den);
3305 return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
3308 while (spf->samples_per_frame[size]) {
3309 total += spf->samples_per_frame[size];
3315 sample_count = (edit_unit / size) * (uint64_t)total;
3316 for (i = 0; i < edit_unit % size; i++) {
3317 sample_count += spf->samples_per_frame[i];
3320 return sample_count;
3324 * Make sure track->sample_count is correct based on what offset we're currently at.
3325 * Also determine the next edit unit (or packet) offset.
3326 * @return next_ofs if OK, <0 on error
3328 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, AVStream *st, int64_t current_offset, int resync)
3330 int64_t next_ofs = -1;
3331 MXFTrack *track = st->priv_data;
3332 int64_t edit_unit = av_rescale_q(track->sample_count, st->time_base, av_inv_q(track->edit_rate));
3333 int64_t new_edit_unit;
3334 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3336 if (!t || track->wrapping == UnknownWrapped)
3339 if (mxf_edit_unit_absolute_offset(mxf, t, edit_unit + track->edit_units_per_packet, track->edit_rate, NULL, &next_ofs, NULL, 0) < 0 &&
3340 (next_ofs = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3341 av_log(mxf->fc, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3345 /* check if the next edit unit offset (next_ofs) starts ahead of current_offset */
3346 if (next_ofs > current_offset)
3350 av_log(mxf->fc, AV_LOG_ERROR, "cannot find current edit unit for stream %d, invalid index?\n", st->index);
3354 if (mxf_get_next_track_edit_unit(mxf, track, current_offset + 1, &new_edit_unit) < 0 || new_edit_unit <= 0) {
3355 av_log(mxf->fc, AV_LOG_ERROR, "failed to find next track edit unit in stream %d\n", st->index);
3360 track->sample_count = mxf_compute_sample_count(mxf, st, new_edit_unit);
3361 av_log(mxf->fc, AV_LOG_WARNING, "edit unit sync lost on stream %d, jumping from %"PRId64" to %"PRId64"\n", st->index, edit_unit, new_edit_unit);
3363 return mxf_set_current_edit_unit(mxf, st, current_offset, 0);
3366 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecParameters *par,
3369 AVStream *st = mxf->fc->streams[pkt->stream_index];
3370 MXFTrack *track = st->priv_data;
3371 int64_t bits_per_sample = par->bits_per_coded_sample;
3373 if (!bits_per_sample)
3374 bits_per_sample = av_get_bits_per_sample(par->codec_id);
3376 pkt->pts = track->sample_count;
3378 if ( par->channels <= 0
3379 || bits_per_sample <= 0
3380 || par->channels * (int64_t)bits_per_sample < 8)
3381 track->sample_count = mxf_compute_sample_count(mxf, st, av_rescale_q(track->sample_count, st->time_base, av_inv_q(track->edit_rate)) + 1);
3383 track->sample_count += pkt->size / (par->channels * (int64_t)bits_per_sample / 8);
3388 static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt)
3390 AVCodecParameters *par = st->codecpar;
3391 MXFTrack *track = st->priv_data;
3393 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
3394 /* see if we have an index table to derive timestamps from */
3395 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3397 if (t && track->sample_count < t->nb_ptses) {
3398 pkt->dts = track->sample_count + t->first_dts;
3399 pkt->pts = t->ptses[track->sample_count];
3400 } else if (track->intra_only) {
3401 /* intra-only -> PTS = EditUnit.
3402 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3403 pkt->pts = track->sample_count;
3405 track->sample_count++;
3406 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
3407 int ret = mxf_set_audio_pts(mxf, par, pkt);
3411 pkt->dts = pkt->pts = track->sample_count;
3413 track->sample_count++;
3418 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3421 MXFContext *mxf = s->priv_data;
3425 int64_t max_data_size;
3426 int64_t pos = avio_tell(s->pb);
3428 if (pos < mxf->current_klv_data.next_klv - mxf->current_klv_data.length || pos >= mxf->current_klv_data.next_klv) {
3429 mxf->current_klv_data = (KLVPacket){{0}};
3430 ret = klv_read_packet(&klv, s->pb);
3433 max_data_size = klv.length;
3434 pos = klv.next_klv - klv.length;
3435 PRINT_KEY(s, "read packet", klv.key);
3436 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3437 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
3438 ret = mxf_decrypt_triplet(s, pkt, &klv);
3440 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
3446 klv = mxf->current_klv_data;
3447 max_data_size = klv.next_klv - pos;
3449 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3450 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3451 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
3452 int body_sid = find_body_sid_by_offset(mxf, klv.offset);
3453 int index = mxf_get_stream_index(s, &klv, body_sid);
3459 av_log(s, AV_LOG_ERROR,
3460 "error getting stream index %"PRIu32"\n",
3461 AV_RB32(klv.key + 12));
3465 st = s->streams[index];
3466 track = st->priv_data;
3468 if (s->streams[index]->discard == AVDISCARD_ALL)
3471 next_ofs = mxf_set_current_edit_unit(mxf, st, pos, 1);
3473 if (track->wrapping != FrameWrapped) {
3476 if (next_ofs <= 0) {
3477 // If we have no way to packetize the data, then return it in chunks...
3478 if (klv.next_klv - klv.length == pos && max_data_size > MXF_MAX_CHUNK_SIZE) {
3479 st->need_parsing = AVSTREAM_PARSE_FULL;
3480 avpriv_request_sample(s, "Huge KLV without proper index in non-frame wrapped essence");
3482 size = FFMIN(max_data_size, MXF_MAX_CHUNK_SIZE);
3484 if ((size = next_ofs - pos) <= 0) {
3485 av_log(s, AV_LOG_ERROR, "bad size: %"PRId64"\n", size);
3486 ret = AVERROR_INVALIDDATA;
3489 // We must not overread, because the next edit unit might be in another KLV
3490 if (size > max_data_size)
3491 size = max_data_size;
3494 mxf->current_klv_data = klv;
3497 klv.next_klv = klv.offset + klv.length;
3500 /* check for 8 channels AES3 element */
3501 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
3502 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
3505 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
3506 mxf->current_klv_data = (KLVPacket){{0}};
3509 } else if (mxf->eia608_extract &&
3510 s->streams[index]->codecpar->codec_id == AV_CODEC_ID_EIA_608) {
3511 ret = mxf_get_eia608_packet(s, s->streams[index], pkt, klv.length);
3513 mxf->current_klv_data = (KLVPacket){{0}};
3517 ret = av_get_packet(s->pb, pkt, klv.length);
3519 mxf->current_klv_data = (KLVPacket){{0}};
3523 pkt->stream_index = index;
3524 pkt->pos = klv.offset;
3526 ret = mxf_set_pts(mxf, st, pkt);
3528 mxf->current_klv_data = (KLVPacket){{0}};
3532 /* seek for truncated packets */
3533 avio_seek(s->pb, klv.next_klv, SEEK_SET);
3538 avio_skip(s->pb, max_data_size);
3539 mxf->current_klv_data = (KLVPacket){{0}};
3542 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3545 static int mxf_read_close(AVFormatContext *s)
3547 MXFContext *mxf = s->priv_data;
3550 av_freep(&mxf->packages_refs);
3551 av_freep(&mxf->essence_container_data_refs);
3553 for (i = 0; i < s->nb_streams; i++)
3554 s->streams[i]->priv_data = NULL;
3556 for (i = 0; i < mxf->metadata_sets_count; i++) {
3557 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3559 av_freep(&mxf->partitions);
3560 av_freep(&mxf->metadata_sets);
3561 av_freep(&mxf->aesc);
3562 av_freep(&mxf->local_tags);
3564 if (mxf->index_tables) {
3565 for (i = 0; i < mxf->nb_index_tables; i++) {
3566 av_freep(&mxf->index_tables[i].segments);
3567 av_freep(&mxf->index_tables[i].ptses);
3568 av_freep(&mxf->index_tables[i].fake_index);
3569 av_freep(&mxf->index_tables[i].offsets);
3572 av_freep(&mxf->index_tables);
3577 static int mxf_probe(const AVProbeData *p) {
3578 const uint8_t *bufp = p->buf;
3579 const uint8_t *end = p->buf + p->buf_size;
3581 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3584 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3585 end -= sizeof(mxf_header_partition_pack_key);
3587 for (; bufp < end;) {
3588 if (!((bufp[13] - 1) & 0xF2)){
3589 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3590 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3591 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3592 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3593 return AVPROBE_SCORE_MAX;
3602 /* rudimentary byte seek */
3603 /* XXX: use MXF Index */
3604 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3606 AVStream *st = s->streams[stream_index];
3608 MXFContext* mxf = s->priv_data;
3612 MXFTrack *source_track = st->priv_data;
3617 /* if audio then truncate sample_time to EditRate */
3618 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
3619 sample_time = av_rescale_q(sample_time, st->time_base,
3620 av_inv_q(source_track->edit_rate));
3622 if (mxf->nb_index_tables <= 0) {
3624 return AVERROR_INVALIDDATA;
3625 if (sample_time < 0)
3627 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3629 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3633 ff_update_cur_dts(s, st, sample_time);
3634 mxf->current_klv_data = (KLVPacket){{0}};
3636 MXFPartition *partition;
3638 t = &mxf->index_tables[0];
3639 if (t->index_sid != source_track->index_sid) {
3640 /* If the first index table does not belong to the stream, then find a stream which does belong to the index table */
3641 for (i = 0; i < s->nb_streams; i++) {
3642 MXFTrack *new_source_track = s->streams[i]->priv_data;
3643 if (new_source_track && new_source_track->index_sid == t->index_sid) {
3644 sample_time = av_rescale_q(sample_time, new_source_track->edit_rate, source_track->edit_rate);
3645 source_track = new_source_track;
3650 if (i == s->nb_streams)
3651 return AVERROR_INVALIDDATA;
3654 /* clamp above zero, else ff_index_search_timestamp() returns negative
3655 * this also means we allow seeking before the start */
3656 sample_time = FFMAX(sample_time, 0);
3658 if (t->fake_index) {
3659 /* The first frames may not be keyframes in presentation order, so
3660 * we have to advance the target to be able to find the first
3661 * keyframe backwards... */
3662 if (!(flags & AVSEEK_FLAG_ANY) &&
3663 (flags & AVSEEK_FLAG_BACKWARD) &&
3664 t->ptses[0] != AV_NOPTS_VALUE &&
3665 sample_time < t->ptses[0] &&
3666 (t->fake_index[t->ptses[0]].flags & AVINDEX_KEYFRAME))
3667 sample_time = t->ptses[0];
3669 /* behave as if we have a proper index */
3670 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3672 /* get the stored order index from the display order index */
3673 sample_time += t->offsets[sample_time];
3675 /* no IndexEntryArray (one or more CBR segments)
3676 * make sure we don't seek past the end */
3677 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3680 if (source_track->wrapping == UnknownWrapped)
3681 av_log(mxf->fc, AV_LOG_WARNING, "attempted seek in an UnknownWrapped essence\n");
3683 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, source_track->edit_rate, &sample_time, &seekpos, &partition, 1)) < 0)
3686 ff_update_cur_dts(s, st, sample_time);
3687 if (source_track->wrapping == ClipWrapped) {
3688 KLVPacket klv = partition->first_essence_klv;
3689 if (seekpos < klv.next_klv - klv.length || seekpos >= klv.next_klv) {
3690 av_log(mxf->fc, AV_LOG_ERROR, "attempted seek out of clip wrapped KLV\n");
3691 return AVERROR_INVALIDDATA;
3693 mxf->current_klv_data = klv;
3695 mxf->current_klv_data = (KLVPacket){{0}};
3697 avio_seek(s->pb, seekpos, SEEK_SET);
3700 // Update all tracks sample count
3701 for (i = 0; i < s->nb_streams; i++) {
3702 AVStream *cur_st = s->streams[i];
3703 MXFTrack *cur_track = cur_st->priv_data;
3705 int64_t track_edit_unit = sample_time;
3707 mxf_get_next_track_edit_unit(mxf, cur_track, seekpos, &track_edit_unit);
3708 cur_track->sample_count = mxf_compute_sample_count(mxf, cur_st, track_edit_unit);
3714 static const AVOption options[] = {
3715 { "eia608_extract", "extract eia 608 captions from s436m track",
3716 offsetof(MXFContext, eia608_extract), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
3717 AV_OPT_FLAG_DECODING_PARAM },
3721 static const AVClass demuxer_class = {
3722 .class_name = "mxf",
3723 .item_name = av_default_item_name,
3725 .version = LIBAVUTIL_VERSION_INT,
3726 .category = AV_CLASS_CATEGORY_DEMUXER,
3729 AVInputFormat ff_mxf_demuxer = {
3731 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3732 .flags = AVFMT_SEEK_TO_PTS,
3733 .priv_data_size = sizeof(MXFContext),
3734 .read_probe = mxf_probe,
3735 .read_header = mxf_read_header,
3736 .read_packet = mxf_read_packet,
3737 .read_close = mxf_read_close,
3738 .read_seek = mxf_read_seek,
3739 .priv_class = &demuxer_class,