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,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1332 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1335 /* EC ULs for intra-only formats */
1336 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1337 { { 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 */
1338 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1341 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1342 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1343 { { 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 */
1344 { { 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 */
1345 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1348 /* actual coded width for AVC-Intra to allow selecting correct SPS/PPS */
1349 static const MXFCodecUL mxf_intra_only_picture_coded_width[] = {
1350 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x01 }, 16, 1440 },
1351 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x02 }, 16, 1440 },
1352 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x03 }, 16, 1440 },
1353 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x04 }, 16, 1440 },
1354 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 0 },
1357 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1358 // sound essence container uls
1359 { { 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 */
1360 { { 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 */
1361 { { 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 */
1362 { { 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 */
1363 { { 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) */
1364 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1367 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1368 { { 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 },
1369 { { 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 },
1370 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x13,0x01,0x01 }, 16, AV_CODEC_ID_TTML },
1371 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1374 static MXFWrappingScheme mxf_get_wrapping_kind(UID *essence_container_ul)
1377 const MXFCodecUL *codec_ul;
1379 codec_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1380 if (!codec_ul->uid[0])
1381 codec_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1382 if (!codec_ul->uid[0])
1383 codec_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
1384 if (!codec_ul->uid[0] || !codec_ul->wrapping_indicator_pos)
1385 return UnknownWrapped;
1387 val = (*essence_container_ul)[codec_ul->wrapping_indicator_pos];
1388 switch (codec_ul->wrapping_indicator_type) {
1393 if (val == 0x03 || val == 0x04)
1402 return FrameWrapped;
1405 return UnknownWrapped;
1408 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1410 int i, j, nb_segments = 0;
1411 MXFIndexTableSegment **unsorted_segments;
1412 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1414 /* count number of segments, allocate arrays and copy unsorted segments */
1415 for (i = 0; i < mxf->metadata_sets_count; i++)
1416 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1420 return AVERROR_INVALIDDATA;
1422 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1423 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1424 av_freep(sorted_segments);
1425 av_free(unsorted_segments);
1426 return AVERROR(ENOMEM);
1429 for (i = nb_segments = 0; i < mxf->metadata_sets_count; i++) {
1430 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
1431 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1432 if (s->edit_unit_byte_count || s->nb_index_entries)
1433 unsorted_segments[nb_segments++] = s;
1435 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1436 s->index_sid, s->index_start_position);
1441 av_freep(sorted_segments);
1442 av_free(unsorted_segments);
1443 return AVERROR_INVALIDDATA;
1446 *nb_sorted_segments = 0;
1448 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1449 for (i = 0; i < nb_segments; i++) {
1450 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1451 uint64_t best_index_duration = 0;
1453 for (j = 0; j < nb_segments; j++) {
1454 MXFIndexTableSegment *s = unsorted_segments[j];
1456 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1457 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1458 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1461 s->body_sid > last_body_sid ||
1462 s->body_sid == last_body_sid && s->index_sid > last_index_sid ||
1463 s->body_sid == last_body_sid && s->index_sid == last_index_sid && s->index_start_position > last_index_start) &&
1465 s->body_sid < best_body_sid ||
1466 s->body_sid == best_body_sid && s->index_sid < best_index_sid ||
1467 s->body_sid == best_body_sid && s->index_sid == best_index_sid && s->index_start_position < best_index_start ||
1468 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)) {
1470 best_body_sid = s->body_sid;
1471 best_index_sid = s->index_sid;
1472 best_index_start = s->index_start_position;
1473 best_index_duration = s->index_duration;
1477 /* no suitable entry found -> we're done */
1481 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1482 last_body_sid = best_body_sid;
1483 last_index_sid = best_index_sid;
1484 last_index_start = best_index_start;
1487 av_free(unsorted_segments);
1493 * Computes the absolute file offset of the given essence container offset
1495 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out, MXFPartition **partition_out)
1497 MXFPartition *last_p = NULL;
1501 return AVERROR(EINVAL);
1504 b = mxf->partitions_count;
1507 m0 = m = (a + b) >> 1;
1509 while (m < b && mxf->partitions[m].body_sid != body_sid)
1512 if (m < b && mxf->partitions[m].body_offset <= offset)
1519 last_p = &mxf->partitions[a];
1521 if (last_p && (!last_p->essence_length || last_p->essence_length > (offset - last_p->body_offset))) {
1522 *offset_out = last_p->essence_offset + (offset - last_p->body_offset);
1524 *partition_out = last_p;
1528 av_log(mxf->fc, AV_LOG_ERROR,
1529 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1532 return AVERROR_INVALIDDATA;
1536 * Returns the end position of the essence container with given BodySID, or zero if unknown
1538 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1543 for (x = 0; x < mxf->partitions_count; x++) {
1544 MXFPartition *p = &mxf->partitions[x];
1546 if (p->body_sid != body_sid)
1549 if (!p->essence_length)
1552 ret = p->essence_offset + p->essence_length;
1558 /* EditUnit -> absolute offset */
1559 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)
1562 int64_t offset_temp = 0;
1564 edit_unit = av_rescale_q(edit_unit, index_table->segments[0]->index_edit_rate, edit_rate);
1566 for (i = 0; i < index_table->nb_segments; i++) {
1567 MXFIndexTableSegment *s = index_table->segments[i];
1569 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1571 if (edit_unit < s->index_start_position + s->index_duration) {
1572 int64_t index = edit_unit - s->index_start_position;
1574 if (s->edit_unit_byte_count)
1575 offset_temp += s->edit_unit_byte_count * index;
1577 if (s->nb_index_entries == 2 * s->index_duration + 1)
1578 index *= 2; /* Avid index */
1580 if (index < 0 || index >= s->nb_index_entries) {
1581 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1582 index_table->index_sid, s->index_start_position);
1583 return AVERROR_INVALIDDATA;
1586 offset_temp = s->stream_offset_entries[index];
1590 *edit_unit_out = av_rescale_q(edit_unit, edit_rate, s->index_edit_rate);
1592 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out);
1594 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1595 offset_temp += s->edit_unit_byte_count * s->index_duration;
1600 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);
1602 return AVERROR_INVALIDDATA;
1605 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1608 int8_t max_temporal_offset = -128;
1611 /* first compute how many entries we have */
1612 for (i = 0; i < index_table->nb_segments; i++) {
1613 MXFIndexTableSegment *s = index_table->segments[i];
1615 if (!s->nb_index_entries) {
1616 index_table->nb_ptses = 0;
1617 return 0; /* no TemporalOffsets */
1620 if (s->index_duration > INT_MAX - index_table->nb_ptses) {
1621 index_table->nb_ptses = 0;
1622 av_log(mxf->fc, AV_LOG_ERROR, "ignoring IndexSID %d, duration is too large\n", s->index_sid);
1626 index_table->nb_ptses += s->index_duration;
1629 /* paranoid check */
1630 if (index_table->nb_ptses <= 0)
1633 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1634 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1635 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1636 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1637 av_freep(&index_table->ptses);
1638 av_freep(&index_table->fake_index);
1639 av_freep(&index_table->offsets);
1640 return AVERROR(ENOMEM);
1643 /* we may have a few bad TemporalOffsets
1644 * make sure the corresponding PTSes don't have the bogus value 0 */
1645 for (x = 0; x < index_table->nb_ptses; x++)
1646 index_table->ptses[x] = AV_NOPTS_VALUE;
1660 * We want to transform it into this:
1671 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1672 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1673 * The latter makes DTS <= PTS.
1675 for (i = x = 0; i < index_table->nb_segments; i++) {
1676 MXFIndexTableSegment *s = index_table->segments[i];
1677 int index_delta = 1;
1678 int n = s->nb_index_entries;
1680 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1681 index_delta = 2; /* Avid index */
1682 /* ignore the last entry - it's the size of the essence container */
1686 for (j = 0; j < n; j += index_delta, x++) {
1687 int offset = s->temporal_offset_entries[j] / index_delta;
1688 int index = x + offset;
1690 if (x >= index_table->nb_ptses) {
1691 av_log(mxf->fc, AV_LOG_ERROR,
1692 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1693 s->nb_index_entries, s->index_duration);
1697 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1699 if (index < 0 || index >= index_table->nb_ptses) {
1700 av_log(mxf->fc, AV_LOG_ERROR,
1701 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1706 index_table->offsets[x] = offset;
1707 index_table->ptses[index] = x;
1708 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1712 /* calculate the fake index table in display order */
1713 for (x = 0; x < index_table->nb_ptses; x++) {
1714 index_table->fake_index[x].timestamp = x;
1715 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1716 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1720 index_table->first_dts = -max_temporal_offset;
1726 * Sorts and collects index table segments into index tables.
1727 * Also computes PTSes if possible.
1729 static int mxf_compute_index_tables(MXFContext *mxf)
1731 int i, j, k, ret, nb_sorted_segments;
1732 MXFIndexTableSegment **sorted_segments = NULL;
1734 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1735 nb_sorted_segments <= 0) {
1736 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1740 /* sanity check and count unique BodySIDs/IndexSIDs */
1741 for (i = 0; i < nb_sorted_segments; i++) {
1742 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1743 mxf->nb_index_tables++;
1744 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1745 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1746 ret = AVERROR_INVALIDDATA;
1747 goto finish_decoding_index;
1751 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1752 sizeof(*mxf->index_tables));
1753 if (!mxf->index_tables) {
1754 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1755 ret = AVERROR(ENOMEM);
1756 goto finish_decoding_index;
1759 /* distribute sorted segments to index tables */
1760 for (i = j = 0; i < nb_sorted_segments; i++) {
1761 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1766 mxf->index_tables[j].nb_segments++;
1769 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1770 MXFIndexTable *t = &mxf->index_tables[j];
1771 MXFTrack *mxf_track = NULL;
1773 t->segments = av_mallocz_array(t->nb_segments,
1774 sizeof(*t->segments));
1777 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1778 " pointer array\n");
1779 ret = AVERROR(ENOMEM);
1780 goto finish_decoding_index;
1783 if (sorted_segments[i]->index_start_position)
1784 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1785 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1787 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1788 t->index_sid = sorted_segments[i]->index_sid;
1789 t->body_sid = sorted_segments[i]->body_sid;
1791 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1792 goto finish_decoding_index;
1794 for (k = 0; k < mxf->fc->nb_streams; k++) {
1795 MXFTrack *track = mxf->fc->streams[k]->priv_data;
1796 if (track && track->index_sid == t->index_sid) {
1802 /* fix zero IndexDurations */
1803 for (k = 0; k < t->nb_segments; k++) {
1804 if (!t->segments[k]->index_edit_rate.num || !t->segments[k]->index_edit_rate.den) {
1805 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has invalid IndexEditRate\n",
1808 t->segments[k]->index_edit_rate = mxf_track->edit_rate;
1811 if (t->segments[k]->index_duration)
1814 if (t->nb_segments > 1)
1815 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1819 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1823 /* assume the first stream's duration is reasonable
1824 * leave index_duration = 0 on further segments in case we have any (unlikely)
1826 t->segments[k]->index_duration = mxf_track->original_duration;
1832 finish_decoding_index:
1833 av_free(sorted_segments);
1837 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1839 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1840 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1841 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1842 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1845 static int mxf_uid_to_str(UID uid, char **str)
1849 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1851 return AVERROR(ENOMEM);
1852 for (i = 0; i < sizeof(UID); i++) {
1853 snprintf(p, 2 + 1, "%.2x", uid[i]);
1855 if (i == 3 || i == 5 || i == 7 || i == 9) {
1856 snprintf(p, 1 + 1, "-");
1863 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1867 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1869 return AVERROR(ENOMEM);
1870 snprintf(p, 2 + 1, "0x");
1872 for (i = 0; i < sizeof(UID); i++) {
1873 snprintf(p, 2 + 1, "%.2X", ul[i]);
1877 for (i = 0; i < sizeof(UID); i++) {
1878 snprintf(p, 2 + 1, "%.2X", uid[i]);
1884 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1890 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1892 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1896 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1898 char buf[AV_TIMECODE_STR_SIZE];
1899 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1904 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1906 MXFStructuralComponent *component = NULL;
1907 MXFPulldownComponent *pulldown = NULL;
1909 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1913 switch (component->type) {
1914 case TimecodeComponent:
1915 return (MXFTimecodeComponent*)component;
1916 case PulldownComponent: /* timcode component may be located on a pulldown component */
1917 pulldown = (MXFPulldownComponent*)component;
1918 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1925 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_ul, UID package_uid)
1927 MXFPackage *package = NULL;
1930 for (i = 0; i < mxf->packages_count; i++) {
1931 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1935 if (!memcmp(package->package_ul, package_ul, 16) && !memcmp(package->package_uid, package_uid, 16))
1941 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1943 MXFDescriptor *sub_descriptor = NULL;
1949 if (descriptor->type == MultipleDescriptor) {
1950 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1951 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1953 if (!sub_descriptor) {
1954 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1957 if (sub_descriptor->linked_track_id == track_id) {
1958 return sub_descriptor;
1961 } else if (descriptor->type == Descriptor)
1967 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1969 MXFStructuralComponent *component = NULL;
1970 MXFPackage *package = NULL;
1971 MXFDescriptor *descriptor = NULL;
1974 if (!essence_group || !essence_group->structural_components_count)
1977 /* essence groups contains multiple representations of the same media,
1978 this return the first components with a valid Descriptor typically index 0 */
1979 for (i =0; i < essence_group->structural_components_count; i++){
1980 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1984 if (!(package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid)))
1987 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1994 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1996 MXFStructuralComponent *component = NULL;
1998 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
2001 switch (component->type) {
2005 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
2012 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
2014 MXFTaggedValue *tag;
2018 for (i = 0; i < package->comment_count; i++) {
2019 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
2020 if (!tag || !tag->name || !tag->value)
2023 size = strlen(tag->name) + 8 + 1;
2024 key = av_mallocz(size);
2026 return AVERROR(ENOMEM);
2028 snprintf(key, size, "comment_%s", tag->name);
2029 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
2034 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
2036 MXFPackage *physical_package = NULL;
2037 MXFTrack *physical_track = NULL;
2038 MXFStructuralComponent *sourceclip = NULL;
2039 MXFTimecodeComponent *mxf_tc = NULL;
2043 int64_t start_position;
2045 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
2046 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
2050 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_ul, sourceclip->source_package_uid)))
2053 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
2055 /* the name of physical source package is name of the reel or tape */
2056 if (physical_package->name && physical_package->name[0])
2057 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
2059 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
2060 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
2062 for (j = 0; j < physical_package->tracks_count; j++) {
2063 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
2064 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2068 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
2069 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2073 if (physical_track->edit_rate.num <= 0 ||
2074 physical_track->edit_rate.den <= 0) {
2075 av_log(mxf->fc, AV_LOG_WARNING,
2076 "Invalid edit rate (%d/%d) found on structural"
2077 " component #%d, defaulting to 25/1\n",
2078 physical_track->edit_rate.num,
2079 physical_track->edit_rate.den, i);
2080 physical_track->edit_rate = (AVRational){25, 1};
2083 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
2084 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
2087 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2088 /* scale sourceclip start_position to match physical track edit rate */
2089 start_position = av_rescale_q(sourceclip->start_position,
2090 physical_track->edit_rate,
2091 source_track->edit_rate);
2093 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
2094 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
2104 static int mxf_add_metadata_stream(MXFContext *mxf, MXFTrack *track)
2106 MXFStructuralComponent *component = NULL;
2107 const MXFCodecUL *codec_ul = NULL;
2108 MXFPackage tmp_package;
2112 for (j = 0; j < track->sequence->structural_components_count; j++) {
2113 component = mxf_resolve_sourceclip(mxf, &track->sequence->structural_components_refs[j]);
2121 st = avformat_new_stream(mxf->fc, NULL);
2123 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate metadata stream\n");
2124 return AVERROR(ENOMEM);
2127 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2128 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2129 st->id = track->track_id;
2131 memcpy(&tmp_package.package_ul, component->source_package_ul, 16);
2132 memcpy(&tmp_package.package_uid, component->source_package_uid, 16);
2133 mxf_add_umid_metadata(&st->metadata, "file_package_umid", &tmp_package);
2134 if (track->name && track->name[0])
2135 av_dict_set(&st->metadata, "track_name", track->name, 0);
2137 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &track->sequence->data_definition_ul);
2138 av_dict_set(&st->metadata, "data_type", av_get_media_type_string(codec_ul->id), 0);
2142 static int mxf_parse_structural_metadata(MXFContext *mxf)
2144 MXFPackage *material_package = NULL;
2147 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
2148 /* TODO: handle multiple material packages (OP3x) */
2149 for (i = 0; i < mxf->packages_count; i++) {
2150 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
2151 if (material_package) break;
2153 if (!material_package) {
2154 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
2155 return AVERROR_INVALIDDATA;
2158 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
2159 if (material_package->name && material_package->name[0])
2160 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
2161 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
2163 for (i = 0; i < material_package->tracks_count; i++) {
2164 MXFPackage *source_package = NULL;
2165 MXFTrack *material_track = NULL;
2166 MXFTrack *source_track = NULL;
2167 MXFTrack *temp_track = NULL;
2168 MXFDescriptor *descriptor = NULL;
2169 MXFStructuralComponent *component = NULL;
2170 MXFTimecodeComponent *mxf_tc = NULL;
2171 UID *essence_container_ul = NULL;
2172 const MXFCodecUL *codec_ul = NULL;
2173 const MXFCodecUL *container_ul = NULL;
2174 const MXFCodecUL *pix_fmt_ul = NULL;
2179 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
2180 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
2184 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
2185 mxf_tc = (MXFTimecodeComponent*)component;
2186 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2187 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2188 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2192 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
2193 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
2197 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2198 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
2202 mxf_tc = (MXFTimecodeComponent*)component;
2203 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2204 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2205 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2210 /* TODO: handle multiple source clips, only finds first valid source clip */
2211 if(material_track->sequence->structural_components_count > 1)
2212 av_log(mxf->fc, AV_LOG_WARNING, "material track %d: has %d components\n",
2213 material_track->track_id, material_track->sequence->structural_components_count);
2215 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2216 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
2220 source_package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid);
2221 if (!source_package) {
2222 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
2225 for (k = 0; k < source_package->tracks_count; k++) {
2226 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
2227 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2228 ret = AVERROR_INVALIDDATA;
2231 if (temp_track->track_id == component->source_track_id) {
2232 source_track = temp_track;
2236 if (!source_track) {
2237 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
2241 for (k = 0; k < mxf->essence_container_data_count; k++) {
2242 MXFEssenceContainerData *essence_data;
2244 if (!(essence_data = mxf_resolve_strong_ref(mxf, &mxf->essence_container_data_refs[k], EssenceContainerData))) {
2245 av_log(mxf->fc, AV_LOG_TRACE, "could not resolve essence container data strong ref\n");
2248 if (!memcmp(component->source_package_ul, essence_data->package_ul, sizeof(UID)) && !memcmp(component->source_package_uid, essence_data->package_uid, sizeof(UID))) {
2249 source_track->body_sid = essence_data->body_sid;
2250 source_track->index_sid = essence_data->index_sid;
2255 if(source_track && component)
2258 if (!source_track || !component || !source_package) {
2259 if((ret = mxf_add_metadata_stream(mxf, material_track)))
2264 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
2265 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2266 ret = AVERROR_INVALIDDATA;
2270 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
2271 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
2272 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
2273 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
2277 st = avformat_new_stream(mxf->fc, NULL);
2279 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
2280 ret = AVERROR(ENOMEM);
2283 st->id = material_track->track_id;
2284 st->priv_data = source_track;
2286 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
2287 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
2289 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
2290 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
2291 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
2292 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
2294 source_track->original_duration = st->duration = component->duration;
2296 if (st->duration == -1)
2297 st->duration = AV_NOPTS_VALUE;
2298 st->start_time = component->start_position;
2299 if (material_track->edit_rate.num <= 0 ||
2300 material_track->edit_rate.den <= 0) {
2301 av_log(mxf->fc, AV_LOG_WARNING,
2302 "Invalid edit rate (%d/%d) found on stream #%d, "
2303 "defaulting to 25/1\n",
2304 material_track->edit_rate.num,
2305 material_track->edit_rate.den, st->index);
2306 material_track->edit_rate = (AVRational){25, 1};
2308 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
2310 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
2311 * the former is accessible via st->priv_data */
2312 source_track->edit_rate = material_track->edit_rate;
2314 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
2315 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
2316 st->codecpar->codec_type = codec_ul->id;
2319 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
2322 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
2323 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
2324 essence_container_ul = &descriptor->essence_container_ul;
2325 source_track->wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_kind(essence_container_ul);
2326 if (source_track->wrapping == UnknownWrapped)
2327 av_log(mxf->fc, AV_LOG_INFO, "wrapping of stream %d is unknown\n", st->index);
2328 /* HACK: replacing the original key with mxf_encrypted_essence_container
2329 * is not allowed according to s429-6, try to find correct information anyway */
2330 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
2331 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
2332 for (k = 0; k < mxf->metadata_sets_count; k++) {
2333 MXFMetadataSet *metadata = mxf->metadata_sets[k];
2334 if (metadata->type == CryptoContext) {
2335 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
2341 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
2342 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
2343 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2344 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
2345 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
2346 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2349 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
2350 avcodec_get_name(st->codecpar->codec_id));
2351 for (k = 0; k < 16; k++) {
2352 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
2353 descriptor->essence_codec_ul[k]);
2354 if (!(k+1 & 19) || k == 5)
2355 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
2357 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2359 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2360 if (source_package->name && source_package->name[0])
2361 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2362 if (material_track->name && material_track->name[0])
2363 av_dict_set(&st->metadata, "track_name", material_track->name, 0);
2365 mxf_parse_physical_source_package(mxf, source_track, st);
2367 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2368 source_track->intra_only = mxf_is_intra_only(descriptor);
2369 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2370 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2371 st->codecpar->codec_id = container_ul->id;
2372 st->codecpar->width = descriptor->width;
2373 st->codecpar->height = descriptor->height; /* Field height, not frame height */
2374 switch (descriptor->frame_layout) {
2376 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2379 /* Every other line is stored and needs to be duplicated. */
2380 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2381 break; /* The correct thing to do here is fall through, but by breaking we might be
2382 able to decode some streams at half the vertical resolution, rather than not al all.
2383 It's also for compatibility with the old behavior. */
2386 case SegmentedFrame:
2387 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2388 case SeparateFields:
2389 av_log(mxf->fc, AV_LOG_DEBUG, "video_line_map: (%d, %d), field_dominance: %d\n",
2390 descriptor->video_line_map[0], descriptor->video_line_map[1],
2391 descriptor->field_dominance);
2392 if ((descriptor->video_line_map[0] > 0) && (descriptor->video_line_map[1] > 0)) {
2393 /* Detect coded field order from VideoLineMap:
2394 * (even, even) => bottom field coded first
2395 * (even, odd) => top field coded first
2396 * (odd, even) => top field coded first
2397 * (odd, odd) => bottom field coded first
2399 if ((descriptor->video_line_map[0] + descriptor->video_line_map[1]) % 2) {
2400 switch (descriptor->field_dominance) {
2401 case MXF_FIELD_DOMINANCE_DEFAULT:
2402 case MXF_FIELD_DOMINANCE_FF:
2403 st->codecpar->field_order = AV_FIELD_TT;
2405 case MXF_FIELD_DOMINANCE_FL:
2406 st->codecpar->field_order = AV_FIELD_TB;
2409 avpriv_request_sample(mxf->fc,
2410 "Field dominance %d support",
2411 descriptor->field_dominance);
2414 switch (descriptor->field_dominance) {
2415 case MXF_FIELD_DOMINANCE_DEFAULT:
2416 case MXF_FIELD_DOMINANCE_FF:
2417 st->codecpar->field_order = AV_FIELD_BB;
2419 case MXF_FIELD_DOMINANCE_FL:
2420 st->codecpar->field_order = AV_FIELD_BT;
2423 avpriv_request_sample(mxf->fc,
2424 "Field dominance %d support",
2425 descriptor->field_dominance);
2429 /* Turn field height into frame height. */
2430 st->codecpar->height *= 2;
2433 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2436 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
2437 switch (descriptor->essence_codec_ul[14]) {
2438 case 1: st->codecpar->codec_tag = MKTAG('a','p','c','o'); break;
2439 case 2: st->codecpar->codec_tag = MKTAG('a','p','c','s'); break;
2440 case 3: st->codecpar->codec_tag = MKTAG('a','p','c','n'); break;
2441 case 4: st->codecpar->codec_tag = MKTAG('a','p','c','h'); break;
2442 case 5: st->codecpar->codec_tag = MKTAG('a','p','4','h'); break;
2443 case 6: st->codecpar->codec_tag = MKTAG('a','p','4','x'); break;
2447 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
2448 st->codecpar->format = descriptor->pix_fmt;
2449 if (st->codecpar->format == AV_PIX_FMT_NONE) {
2450 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2451 &descriptor->essence_codec_ul);
2452 st->codecpar->format = (enum AVPixelFormat)pix_fmt_ul->id;
2453 if (st->codecpar->format== AV_PIX_FMT_NONE) {
2454 st->codecpar->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2455 &descriptor->essence_codec_ul)->id;
2456 if (!st->codecpar->codec_tag) {
2457 /* support files created before RP224v10 by defaulting to UYVY422
2458 if subsampling is 4:2:2 and component depth is 8-bit */
2459 if (descriptor->horiz_subsampling == 2 &&
2460 descriptor->vert_subsampling == 1 &&
2461 descriptor->component_depth == 8) {
2462 st->codecpar->format = AV_PIX_FMT_UYVY422;
2468 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2469 if (material_track->sequence->origin) {
2470 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2472 if (source_track->sequence->origin) {
2473 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2475 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2476 st->display_aspect_ratio = descriptor->aspect_ratio;
2477 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
2478 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2479 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2480 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))
2481 st->codecpar->codec_id = (enum AVCodecID)container_ul->id;
2482 st->codecpar->channels = descriptor->channels;
2484 if (descriptor->sample_rate.den > 0) {
2485 st->codecpar->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2486 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2488 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2489 "found for stream #%d, time base forced to 1/48000\n",
2490 descriptor->sample_rate.num, descriptor->sample_rate.den,
2492 avpriv_set_pts_info(st, 64, 1, 48000);
2495 /* if duration is set, rescale it from EditRate to SampleRate */
2496 if (st->duration != AV_NOPTS_VALUE)
2497 st->duration = av_rescale_q(st->duration,
2498 av_inv_q(material_track->edit_rate),
2501 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2502 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
2503 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2504 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
2505 else if (descriptor->bits_per_sample == 32)
2506 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
2507 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) {
2508 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2509 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24BE;
2510 else if (descriptor->bits_per_sample == 32)
2511 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
2512 } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
2513 st->need_parsing = AVSTREAM_PARSE_FULL;
2515 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2516 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
2517 enum AVMediaType type;
2518 container_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
2519 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2520 st->codecpar->codec_id = container_ul->id;
2521 type = avcodec_get_type(st->codecpar->codec_id);
2522 if (type == AVMEDIA_TYPE_SUBTITLE)
2523 st->codecpar->codec_type = type;
2524 if (container_ul->desc)
2525 av_dict_set(&st->metadata, "data_type", container_ul->desc, 0);
2526 if (mxf->eia608_extract &&
2527 !strcmp(container_ul->desc, "vbi_vanc_smpte_436M")) {
2528 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2529 st->codecpar->codec_id = AV_CODEC_ID_EIA_608;
2532 if (descriptor->extradata) {
2533 if (!ff_alloc_extradata(st->codecpar, descriptor->extradata_size)) {
2534 memcpy(st->codecpar->extradata, descriptor->extradata, descriptor->extradata_size);
2536 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2537 int coded_width = mxf_get_codec_ul(mxf_intra_only_picture_coded_width,
2538 &descriptor->essence_codec_ul)->id;
2540 st->codecpar->width = coded_width;
2541 ret = ff_generate_avci_extradata(st);
2545 if (st->codecpar->codec_type != AVMEDIA_TYPE_DATA && source_track->wrapping != FrameWrapped) {
2546 /* TODO: decode timestamps */
2547 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2556 static int64_t mxf_timestamp_to_int64(uint64_t timestamp)
2558 struct tm time = { 0 };
2560 time.tm_year = (timestamp >> 48) - 1900;
2561 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2562 time.tm_mday = (timestamp >> 32 & 0xFF);
2563 time.tm_hour = (timestamp >> 24 & 0xFF);
2564 time.tm_min = (timestamp >> 16 & 0xFF);
2565 time.tm_sec = (timestamp >> 8 & 0xFF);
2566 msecs = (timestamp & 0xFF) * 4;
2568 /* Clip values for legacy reasons. Maybe we should return error instead? */
2569 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2570 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2571 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2572 time.tm_min = av_clip(time.tm_min, 0, 59);
2573 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2574 msecs = av_clip(msecs, 0, 999);
2576 return (int64_t)av_timegm(&time) * 1000000 + msecs * 1000;
2579 #define SET_STR_METADATA(pb, name, str) do { \
2580 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2582 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2585 #define SET_UID_METADATA(pb, name, var, str) do { \
2586 avio_read(pb, var, 16); \
2587 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2589 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2592 #define SET_TS_METADATA(pb, name, var, str) do { \
2593 var = avio_rb64(pb); \
2594 if (var && (ret = avpriv_dict_set_timestamp(&s->metadata, name, mxf_timestamp_to_int64(var))) < 0) \
2598 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2600 MXFContext *mxf = arg;
2601 AVFormatContext *s = mxf->fc;
2608 SET_STR_METADATA(pb, "company_name", str);
2611 SET_STR_METADATA(pb, "product_name", str);
2614 SET_STR_METADATA(pb, "product_version", str);
2617 SET_UID_METADATA(pb, "product_uid", uid, str);
2620 SET_TS_METADATA(pb, "modification_date", ts, str);
2623 SET_STR_METADATA(pb, "application_platform", str);
2626 SET_UID_METADATA(pb, "generation_uid", uid, str);
2629 SET_UID_METADATA(pb, "uid", uid, str);
2635 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2637 MXFContext *mxf = arg;
2638 AVFormatContext *s = mxf->fc;
2642 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2643 SET_STR_METADATA(pb, "project_name", str);
2648 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2649 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2650 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2651 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2652 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2653 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2654 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2655 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2656 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2657 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2658 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2659 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2660 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2661 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2662 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2663 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2664 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2665 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2666 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2667 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2668 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2669 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2670 { { 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 */
2671 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2672 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2673 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2674 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2675 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2676 { { 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 */
2677 { { 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 */
2678 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2679 { { 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 */
2680 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2681 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2682 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2683 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2684 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2685 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2686 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x23,0x00 }, mxf_read_essence_container_data, sizeof(MXFEssenceContainerData), EssenceContainerData },
2687 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2690 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2693 case MultipleDescriptor:
2695 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2696 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2704 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2706 AVIOContext *pb = mxf->fc->pb;
2707 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2708 uint64_t klv_end = avio_tell(pb) + klv->length;
2711 return AVERROR(ENOMEM);
2712 mxf_metadataset_init(ctx, type);
2713 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2715 int tag = avio_rb16(pb);
2716 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2717 uint64_t next = avio_tell(pb) + size;
2720 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2721 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2722 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2725 if (tag > 0x7FFF) { /* dynamic tag */
2727 for (i = 0; i < mxf->local_tags_count; i++) {
2728 int local_tag = AV_RB16(mxf->local_tags+i*18);
2729 if (local_tag == tag) {
2730 memcpy(uid, mxf->local_tags+i*18+2, 16);
2731 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2732 PRINT_KEY(mxf->fc, "uid", uid);
2736 if (ctx_size && tag == 0x3C0A) {
2737 avio_read(pb, ctx->uid, 16);
2738 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2740 mxf_free_metadataset(&ctx, 1);
2744 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2745 * it extending past the end of the KLV though (zzuf5.mxf). */
2746 if (avio_tell(pb) > klv_end) {
2749 mxf_free_metadataset(&ctx, 1);
2752 av_log(mxf->fc, AV_LOG_ERROR,
2753 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2755 return AVERROR_INVALIDDATA;
2756 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2757 avio_seek(pb, next, SEEK_SET);
2759 if (ctx_size) ctx->type = type;
2760 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2764 * Matches any partition pack key, in other words:
2768 * @return non-zero if the key is a partition pack key, zero otherwise
2770 static int mxf_is_partition_pack_key(UID key)
2772 //NOTE: this is a little lax since it doesn't constraint key[14]
2773 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2774 key[13] >= 2 && key[13] <= 4;
2778 * Parses a metadata KLV
2779 * @return <0 on error, 0 otherwise
2781 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2782 int ctx_size, enum MXFMetadataSetType type)
2784 AVFormatContext *s = mxf->fc;
2786 if (klv.key[5] == 0x53) {
2787 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2789 uint64_t next = avio_tell(s->pb) + klv.length;
2790 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2792 /* only seek forward, else this can loop for a long time */
2793 if (avio_tell(s->pb) > next) {
2794 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2796 return AVERROR_INVALIDDATA;
2799 avio_seek(s->pb, next, SEEK_SET);
2802 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2809 * Seeks to the previous partition and parses it, if possible
2810 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2812 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2814 AVIOContext *pb = mxf->fc->pb;
2816 int64_t current_partition_ofs;
2819 if (!mxf->current_partition ||
2820 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2821 return 0; /* we've parsed all partitions */
2823 /* seek to previous partition */
2824 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2825 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2826 mxf->current_partition = NULL;
2828 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2830 /* Make sure this is actually a PartitionPack, and if so parse it.
2833 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2834 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2838 if (!mxf_is_partition_pack_key(klv.key)) {
2839 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2840 return AVERROR_INVALIDDATA;
2843 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2844 * can point to just before the current partition, causing klv_read_packet()
2845 * to sync back up to it. See deadlock3.mxf
2847 if (klv.offset >= current_partition_ofs) {
2848 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2849 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2850 return AVERROR_INVALIDDATA;
2853 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2860 * Called when essence is encountered
2861 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2863 static int mxf_parse_handle_essence(MXFContext *mxf)
2865 AVIOContext *pb = mxf->fc->pb;
2868 if (mxf->parsing_backward) {
2869 return mxf_seek_to_previous_partition(mxf);
2871 if (!mxf->footer_partition) {
2872 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2876 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2878 /* remember where we were so we don't end up seeking further back than this */
2879 mxf->last_forward_tell = avio_tell(pb);
2881 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2882 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2886 /* seek to FooterPartition and parse backward */
2887 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2888 av_log(mxf->fc, AV_LOG_ERROR,
2889 "failed to seek to FooterPartition @ 0x%" PRIx64
2890 " (%"PRId64") - partial file?\n",
2891 mxf->run_in + mxf->footer_partition, ret);
2895 mxf->current_partition = NULL;
2896 mxf->parsing_backward = 1;
2903 * Called when the next partition or EOF is encountered
2904 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2906 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2908 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2911 static MXFWrappingScheme mxf_get_wrapping_by_body_sid(AVFormatContext *s, int body_sid)
2913 for (int i = 0; i < s->nb_streams; i++) {
2914 MXFTrack *track = s->streams[i]->priv_data;
2915 if (track && track->body_sid == body_sid && track->wrapping != UnknownWrapped)
2916 return track->wrapping;
2918 return UnknownWrapped;
2922 * Figures out the proper offset and length of the essence container in each partition
2924 static void mxf_compute_essence_containers(AVFormatContext *s)
2926 MXFContext *mxf = s->priv_data;
2929 for (x = 0; x < mxf->partitions_count; x++) {
2930 MXFPartition *p = &mxf->partitions[x];
2931 MXFWrappingScheme wrapping;
2934 continue; /* BodySID == 0 -> no essence */
2936 /* for clip wrapped essences we point essence_offset after the KL (usually klv.offset + 20 or 25)
2937 * otherwise we point essence_offset at the key of the first essence KLV.
2940 wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_by_body_sid(s, p->body_sid);
2942 if (wrapping == ClipWrapped) {
2943 p->essence_offset = p->first_essence_klv.next_klv - p->first_essence_klv.length;
2944 p->essence_length = p->first_essence_klv.length;
2946 p->essence_offset = p->first_essence_klv.offset;
2948 /* essence container spans to the next partition */
2949 if (x < mxf->partitions_count - 1)
2950 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2952 if (p->essence_length < 0) {
2953 /* next ThisPartition < essence_offset */
2954 p->essence_length = 0;
2955 av_log(mxf->fc, AV_LOG_ERROR,
2956 "partition %i: bad ThisPartition = %"PRIX64"\n",
2957 x+1, mxf->partitions[x+1].this_partition);
2963 static int is_pcm(enum AVCodecID codec_id)
2965 /* we only care about "normal" PCM codecs until we get samples */
2966 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2969 static MXFIndexTable *mxf_find_index_table(MXFContext *mxf, int index_sid)
2972 for (i = 0; i < mxf->nb_index_tables; i++)
2973 if (mxf->index_tables[i].index_sid == index_sid)
2974 return &mxf->index_tables[i];
2979 * Deal with the case where for some audio atoms EditUnitByteCount is
2980 * very small (2, 4..). In those cases we should read more than one
2981 * sample per call to mxf_read_packet().
2983 static void mxf_compute_edit_units_per_packet(MXFContext *mxf, AVStream *st)
2985 MXFTrack *track = st->priv_data;
2990 track->edit_units_per_packet = 1;
2991 if (track->wrapping != ClipWrapped)
2994 t = mxf_find_index_table(mxf, track->index_sid);
2996 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2997 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
2998 !is_pcm(st->codecpar->codec_id) ||
3000 t->nb_segments != 1 ||
3001 t->segments[0]->edit_unit_byte_count >= 32)
3004 /* arbitrarily default to 48 kHz PAL audio frame size */
3005 /* TODO: We could compute this from the ratio between the audio
3006 * and video edit rates for 48 kHz NTSC we could use the
3007 * 1802-1802-1802-1802-1801 pattern. */
3008 track->edit_units_per_packet = FFMAX(1, track->edit_rate.num / track->edit_rate.den / 25);
3012 * Deal with the case where ClipWrapped essences does not have any IndexTableSegments.
3014 static int mxf_handle_missing_index_segment(MXFContext *mxf, AVStream *st)
3016 MXFTrack *track = st->priv_data;
3017 MXFIndexTableSegment *segment = NULL;
3018 MXFPartition *p = NULL;
3019 int essence_partition_count = 0;
3020 int edit_unit_byte_count = 0;
3023 if (!track || track->wrapping != ClipWrapped)
3026 /* check if track already has an IndexTableSegment */
3027 for (i = 0; i < mxf->metadata_sets_count; i++) {
3028 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
3029 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
3030 if (s->body_sid == track->body_sid)
3035 /* find the essence partition */
3036 for (i = 0; i < mxf->partitions_count; i++) {
3037 /* BodySID == 0 -> no essence */
3038 if (mxf->partitions[i].body_sid != track->body_sid)
3041 p = &mxf->partitions[i];
3042 essence_partition_count++;
3045 /* only handle files with a single essence partition */
3046 if (essence_partition_count != 1)
3049 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && is_pcm(st->codecpar->codec_id)) {
3050 edit_unit_byte_count = (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->channels) >> 3;
3051 } else if (st->duration > 0 && p->first_essence_klv.length > 0 && p->first_essence_klv.length % st->duration == 0) {
3052 edit_unit_byte_count = p->first_essence_klv.length / st->duration;
3055 if (edit_unit_byte_count <= 0)
3058 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);
3060 if (!(segment = av_mallocz(sizeof(*segment))))
3061 return AVERROR(ENOMEM);
3063 if ((ret = mxf_add_metadata_set(mxf, segment))) {
3064 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
3068 /* Make sure we have nonzero unique index_sid, body_sid will be ok, because
3069 * using the same SID for index is forbidden in MXF. */
3070 if (!track->index_sid)
3071 track->index_sid = track->body_sid;
3073 segment->type = IndexTableSegment;
3074 /* stream will be treated as small EditUnitByteCount */
3075 segment->edit_unit_byte_count = edit_unit_byte_count;
3076 segment->index_start_position = 0;
3077 segment->index_duration = st->duration;
3078 segment->index_edit_rate = av_inv_q(st->time_base);
3079 segment->index_sid = track->index_sid;
3080 segment->body_sid = p->body_sid;
3084 static void mxf_read_random_index_pack(AVFormatContext *s)
3086 MXFContext *mxf = s->priv_data;
3088 int64_t file_size, max_rip_length, min_rip_length;
3091 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
3094 file_size = avio_size(s->pb);
3096 /* S377m says to check the RIP length for "silly" values, without defining "silly".
3097 * The limit below assumes a file with nothing but partition packs and a RIP.
3098 * Before changing this, consider that a muxer may place each sample in its own partition.
3100 * 105 is the size of the smallest possible PartitionPack
3101 * 12 is the size of each RIP entry
3102 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
3104 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
3105 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
3107 /* We're only interested in RIPs with at least two entries.. */
3108 min_rip_length = 16+1+24+4;
3110 /* See S377m section 11 */
3111 avio_seek(s->pb, file_size - 4, SEEK_SET);
3112 length = avio_rb32(s->pb);
3114 if (length < min_rip_length || length > max_rip_length)
3116 avio_seek(s->pb, file_size - length, SEEK_SET);
3117 if (klv_read_packet(&klv, s->pb) < 0 ||
3118 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
3119 klv.length != length - 20)
3122 avio_skip(s->pb, klv.length - 12);
3123 mxf->footer_partition = avio_rb64(s->pb);
3126 if (mxf->run_in + mxf->footer_partition >= file_size) {
3127 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
3128 mxf->footer_partition = 0;
3132 avio_seek(s->pb, mxf->run_in, SEEK_SET);
3135 static int mxf_read_header(AVFormatContext *s)
3137 MXFContext *mxf = s->priv_data;
3139 int64_t essence_offset = 0;
3142 mxf->last_forward_tell = INT64_MAX;
3144 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
3145 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
3146 return AVERROR_INVALIDDATA;
3148 avio_seek(s->pb, -14, SEEK_CUR);
3150 mxf->run_in = avio_tell(s->pb);
3152 mxf_read_random_index_pack(s);
3154 while (!avio_feof(s->pb)) {
3155 const MXFMetadataReadTableEntry *metadata;
3157 if (klv_read_packet(&klv, s->pb) < 0) {
3158 /* EOF - seek to previous partition or stop */
3159 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3165 PRINT_KEY(s, "read header", klv.key);
3166 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3167 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
3168 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3169 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3170 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
3171 IS_KLV_KEY(klv.key, mxf_system_item_key_cp) ||
3172 IS_KLV_KEY(klv.key, mxf_system_item_key_gc)) {
3174 if (!mxf->current_partition) {
3175 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
3176 return AVERROR_INVALIDDATA;
3179 if (!mxf->current_partition->first_essence_klv.offset)
3180 mxf->current_partition->first_essence_klv = klv;
3182 if (!essence_offset)
3183 essence_offset = klv.offset;
3185 /* seek to footer, previous partition or stop */
3186 if (mxf_parse_handle_essence(mxf) <= 0)
3189 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
3190 /* next partition pack - keep going, seek to previous partition or stop */
3191 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3193 else if (mxf->parsing_backward)
3195 /* we're still parsing forward. proceed to parsing this partition pack */
3198 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
3199 if (IS_KLV_KEY(klv.key, metadata->key)) {
3200 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
3205 if (!metadata->read) {
3206 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
3208 avio_skip(s->pb, klv.length);
3211 /* FIXME avoid seek */
3212 if (!essence_offset) {
3213 av_log(s, AV_LOG_ERROR, "no essence\n");
3214 ret = AVERROR_INVALIDDATA;
3217 avio_seek(s->pb, essence_offset, SEEK_SET);
3219 /* we need to do this before computing the index tables
3220 * to be able to fill in zero IndexDurations with st->duration */
3221 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
3224 for (int i = 0; i < s->nb_streams; i++)
3225 mxf_handle_missing_index_segment(mxf, s->streams[i]);
3227 if ((ret = mxf_compute_index_tables(mxf)) < 0)
3230 if (mxf->nb_index_tables > 1) {
3231 /* TODO: look up which IndexSID to use via EssenceContainerData */
3232 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
3233 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
3234 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom && (s->error_recognition & AV_EF_EXPLODE)) {
3235 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
3236 ret = AVERROR_INVALIDDATA;
3240 mxf_compute_essence_containers(s);
3242 for (int i = 0; i < s->nb_streams; i++)
3243 mxf_compute_edit_units_per_packet(mxf, s->streams[i]);
3252 /* Get the edit unit of the next packet from current_offset in a track. The returned edit unit can be original_duration as well! */
3253 static int mxf_get_next_track_edit_unit(MXFContext *mxf, MXFTrack *track, int64_t current_offset, int64_t *edit_unit_out)
3255 int64_t a, b, m, offset;
3256 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3258 if (!t || track->original_duration <= 0)
3262 b = track->original_duration;
3266 if (mxf_edit_unit_absolute_offset(mxf, t, m, track->edit_rate, NULL, &offset, NULL, 0) < 0)
3268 if (offset < current_offset)
3279 static int64_t mxf_compute_sample_count(MXFContext *mxf, AVStream *st,
3282 int i, total = 0, size = 0;
3283 MXFTrack *track = st->priv_data;
3284 AVRational time_base = av_inv_q(track->edit_rate);
3285 AVRational sample_rate = av_inv_q(st->time_base);
3286 const MXFSamplesPerFrame *spf = NULL;
3287 int64_t sample_count;
3289 // For non-audio sample_count equals current edit unit
3290 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
3293 if ((sample_rate.num / sample_rate.den) == 48000)
3294 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
3296 int remainder = (sample_rate.num * time_base.num) %
3297 (time_base.den * sample_rate.den);
3299 av_log(mxf->fc, AV_LOG_WARNING,
3300 "seeking detected on stream #%d with time base (%d/%d) and "
3301 "sample rate (%d/%d), audio pts won't be accurate.\n",
3302 st->index, time_base.num, time_base.den,
3303 sample_rate.num, sample_rate.den);
3304 return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
3307 while (spf->samples_per_frame[size]) {
3308 total += spf->samples_per_frame[size];
3314 sample_count = (edit_unit / size) * (uint64_t)total;
3315 for (i = 0; i < edit_unit % size; i++) {
3316 sample_count += spf->samples_per_frame[i];
3319 return sample_count;
3323 * Make sure track->sample_count is correct based on what offset we're currently at.
3324 * Also determine the next edit unit (or packet) offset.
3325 * @return next_ofs if OK, <0 on error
3327 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, AVStream *st, int64_t current_offset, int resync)
3329 int64_t next_ofs = -1;
3330 MXFTrack *track = st->priv_data;
3331 int64_t edit_unit = av_rescale_q(track->sample_count, st->time_base, av_inv_q(track->edit_rate));
3332 int64_t new_edit_unit;
3333 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3335 if (!t || track->wrapping == UnknownWrapped)
3338 if (mxf_edit_unit_absolute_offset(mxf, t, edit_unit + track->edit_units_per_packet, track->edit_rate, NULL, &next_ofs, NULL, 0) < 0 &&
3339 (next_ofs = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3340 av_log(mxf->fc, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3344 /* check if the next edit unit offset (next_ofs) starts ahead of current_offset */
3345 if (next_ofs > current_offset)
3349 av_log(mxf->fc, AV_LOG_ERROR, "cannot find current edit unit for stream %d, invalid index?\n", st->index);
3353 if (mxf_get_next_track_edit_unit(mxf, track, current_offset + 1, &new_edit_unit) < 0 || new_edit_unit <= 0) {
3354 av_log(mxf->fc, AV_LOG_ERROR, "failed to find next track edit unit in stream %d\n", st->index);
3359 track->sample_count = mxf_compute_sample_count(mxf, st, new_edit_unit);
3360 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);
3362 return mxf_set_current_edit_unit(mxf, st, current_offset, 0);
3365 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecParameters *par,
3368 AVStream *st = mxf->fc->streams[pkt->stream_index];
3369 MXFTrack *track = st->priv_data;
3370 int64_t bits_per_sample = par->bits_per_coded_sample;
3372 if (!bits_per_sample)
3373 bits_per_sample = av_get_bits_per_sample(par->codec_id);
3375 pkt->pts = track->sample_count;
3377 if ( par->channels <= 0
3378 || bits_per_sample <= 0
3379 || par->channels * (int64_t)bits_per_sample < 8)
3380 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);
3382 track->sample_count += pkt->size / (par->channels * (int64_t)bits_per_sample / 8);
3387 static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt)
3389 AVCodecParameters *par = st->codecpar;
3390 MXFTrack *track = st->priv_data;
3392 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
3393 /* see if we have an index table to derive timestamps from */
3394 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3396 if (t && track->sample_count < t->nb_ptses) {
3397 pkt->dts = track->sample_count + t->first_dts;
3398 pkt->pts = t->ptses[track->sample_count];
3399 } else if (track->intra_only) {
3400 /* intra-only -> PTS = EditUnit.
3401 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3402 pkt->pts = track->sample_count;
3404 track->sample_count++;
3405 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
3406 int ret = mxf_set_audio_pts(mxf, par, pkt);
3410 pkt->dts = pkt->pts = track->sample_count;
3412 track->sample_count++;
3417 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3420 MXFContext *mxf = s->priv_data;
3424 int64_t max_data_size;
3425 int64_t pos = avio_tell(s->pb);
3427 if (pos < mxf->current_klv_data.next_klv - mxf->current_klv_data.length || pos >= mxf->current_klv_data.next_klv) {
3428 mxf->current_klv_data = (KLVPacket){{0}};
3429 ret = klv_read_packet(&klv, s->pb);
3432 max_data_size = klv.length;
3433 pos = klv.next_klv - klv.length;
3434 PRINT_KEY(s, "read packet", klv.key);
3435 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3436 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
3437 ret = mxf_decrypt_triplet(s, pkt, &klv);
3439 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
3445 klv = mxf->current_klv_data;
3446 max_data_size = klv.next_klv - pos;
3448 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3449 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3450 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
3451 int body_sid = find_body_sid_by_offset(mxf, klv.offset);
3452 int index = mxf_get_stream_index(s, &klv, body_sid);
3458 av_log(s, AV_LOG_ERROR,
3459 "error getting stream index %"PRIu32"\n",
3460 AV_RB32(klv.key + 12));
3464 st = s->streams[index];
3465 track = st->priv_data;
3467 if (s->streams[index]->discard == AVDISCARD_ALL)
3470 next_ofs = mxf_set_current_edit_unit(mxf, st, pos, 1);
3472 if (track->wrapping != FrameWrapped) {
3475 if (next_ofs <= 0) {
3476 // If we have no way to packetize the data, then return it in chunks...
3477 if (klv.next_klv - klv.length == pos && max_data_size > MXF_MAX_CHUNK_SIZE) {
3478 st->need_parsing = AVSTREAM_PARSE_FULL;
3479 avpriv_request_sample(s, "Huge KLV without proper index in non-frame wrapped essence");
3481 size = FFMIN(max_data_size, MXF_MAX_CHUNK_SIZE);
3483 if ((size = next_ofs - pos) <= 0) {
3484 av_log(s, AV_LOG_ERROR, "bad size: %"PRId64"\n", size);
3485 ret = AVERROR_INVALIDDATA;
3488 // We must not overread, because the next edit unit might be in another KLV
3489 if (size > max_data_size)
3490 size = max_data_size;
3493 mxf->current_klv_data = klv;
3496 klv.next_klv = klv.offset + klv.length;
3499 /* check for 8 channels AES3 element */
3500 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
3501 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
3504 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
3505 mxf->current_klv_data = (KLVPacket){{0}};
3508 } else if (mxf->eia608_extract &&
3509 s->streams[index]->codecpar->codec_id == AV_CODEC_ID_EIA_608) {
3510 ret = mxf_get_eia608_packet(s, s->streams[index], pkt, klv.length);
3512 mxf->current_klv_data = (KLVPacket){{0}};
3516 ret = av_get_packet(s->pb, pkt, klv.length);
3518 mxf->current_klv_data = (KLVPacket){{0}};
3522 pkt->stream_index = index;
3523 pkt->pos = klv.offset;
3525 ret = mxf_set_pts(mxf, st, pkt);
3527 mxf->current_klv_data = (KLVPacket){{0}};
3531 /* seek for truncated packets */
3532 avio_seek(s->pb, klv.next_klv, SEEK_SET);
3537 avio_skip(s->pb, max_data_size);
3538 mxf->current_klv_data = (KLVPacket){{0}};
3541 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3544 static int mxf_read_close(AVFormatContext *s)
3546 MXFContext *mxf = s->priv_data;
3549 av_freep(&mxf->packages_refs);
3550 av_freep(&mxf->essence_container_data_refs);
3552 for (i = 0; i < s->nb_streams; i++)
3553 s->streams[i]->priv_data = NULL;
3555 for (i = 0; i < mxf->metadata_sets_count; i++) {
3556 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3558 av_freep(&mxf->partitions);
3559 av_freep(&mxf->metadata_sets);
3560 av_freep(&mxf->aesc);
3561 av_freep(&mxf->local_tags);
3563 if (mxf->index_tables) {
3564 for (i = 0; i < mxf->nb_index_tables; i++) {
3565 av_freep(&mxf->index_tables[i].segments);
3566 av_freep(&mxf->index_tables[i].ptses);
3567 av_freep(&mxf->index_tables[i].fake_index);
3568 av_freep(&mxf->index_tables[i].offsets);
3571 av_freep(&mxf->index_tables);
3576 static int mxf_probe(AVProbeData *p) {
3577 const uint8_t *bufp = p->buf;
3578 const uint8_t *end = p->buf + p->buf_size;
3580 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3583 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3584 end -= sizeof(mxf_header_partition_pack_key);
3586 for (; bufp < end;) {
3587 if (!((bufp[13] - 1) & 0xF2)){
3588 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3589 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3590 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3591 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3592 return AVPROBE_SCORE_MAX;
3601 /* rudimentary byte seek */
3602 /* XXX: use MXF Index */
3603 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3605 AVStream *st = s->streams[stream_index];
3607 MXFContext* mxf = s->priv_data;
3611 MXFTrack *source_track = st->priv_data;
3616 /* if audio then truncate sample_time to EditRate */
3617 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
3618 sample_time = av_rescale_q(sample_time, st->time_base,
3619 av_inv_q(source_track->edit_rate));
3621 if (mxf->nb_index_tables <= 0) {
3623 return AVERROR_INVALIDDATA;
3624 if (sample_time < 0)
3626 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3628 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3632 ff_update_cur_dts(s, st, sample_time);
3633 mxf->current_klv_data = (KLVPacket){{0}};
3635 MXFPartition *partition;
3637 t = &mxf->index_tables[0];
3638 if (t->index_sid != source_track->index_sid) {
3639 /* If the first index table does not belong to the stream, then find a stream which does belong to the index table */
3640 for (i = 0; i < s->nb_streams; i++) {
3641 MXFTrack *new_source_track = s->streams[i]->priv_data;
3642 if (new_source_track && new_source_track->index_sid == t->index_sid) {
3643 sample_time = av_rescale_q(sample_time, new_source_track->edit_rate, source_track->edit_rate);
3644 source_track = new_source_track;
3649 if (i == s->nb_streams)
3650 return AVERROR_INVALIDDATA;
3653 /* clamp above zero, else ff_index_search_timestamp() returns negative
3654 * this also means we allow seeking before the start */
3655 sample_time = FFMAX(sample_time, 0);
3657 if (t->fake_index) {
3658 /* The first frames may not be keyframes in presentation order, so
3659 * we have to advance the target to be able to find the first
3660 * keyframe backwards... */
3661 if (!(flags & AVSEEK_FLAG_ANY) &&
3662 (flags & AVSEEK_FLAG_BACKWARD) &&
3663 t->ptses[0] != AV_NOPTS_VALUE &&
3664 sample_time < t->ptses[0] &&
3665 (t->fake_index[t->ptses[0]].flags & AVINDEX_KEYFRAME))
3666 sample_time = t->ptses[0];
3668 /* behave as if we have a proper index */
3669 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3671 /* get the stored order index from the display order index */
3672 sample_time += t->offsets[sample_time];
3674 /* no IndexEntryArray (one or more CBR segments)
3675 * make sure we don't seek past the end */
3676 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3679 if (source_track->wrapping == UnknownWrapped)
3680 av_log(mxf->fc, AV_LOG_WARNING, "attempted seek in an UnknownWrapped essence\n");
3682 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, source_track->edit_rate, &sample_time, &seekpos, &partition, 1)) < 0)
3685 ff_update_cur_dts(s, st, sample_time);
3686 if (source_track->wrapping == ClipWrapped) {
3687 KLVPacket klv = partition->first_essence_klv;
3688 if (seekpos < klv.next_klv - klv.length || seekpos >= klv.next_klv) {
3689 av_log(mxf->fc, AV_LOG_ERROR, "attempted seek out of clip wrapped KLV\n");
3690 return AVERROR_INVALIDDATA;
3692 mxf->current_klv_data = klv;
3694 mxf->current_klv_data = (KLVPacket){{0}};
3696 avio_seek(s->pb, seekpos, SEEK_SET);
3699 // Update all tracks sample count
3700 for (i = 0; i < s->nb_streams; i++) {
3701 AVStream *cur_st = s->streams[i];
3702 MXFTrack *cur_track = cur_st->priv_data;
3704 int64_t track_edit_unit = sample_time;
3706 mxf_get_next_track_edit_unit(mxf, cur_track, seekpos, &track_edit_unit);
3707 cur_track->sample_count = mxf_compute_sample_count(mxf, cur_st, track_edit_unit);
3713 static const AVOption options[] = {
3714 { "eia608_extract", "extract eia 608 captions from s436m track",
3715 offsetof(MXFContext, eia608_extract), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
3716 AV_OPT_FLAG_DECODING_PARAM },
3720 static const AVClass demuxer_class = {
3721 .class_name = "mxf",
3722 .item_name = av_default_item_name,
3724 .version = LIBAVUTIL_VERSION_INT,
3725 .category = AV_CLASS_CATEGORY_DEMUXER,
3728 AVInputFormat ff_mxf_demuxer = {
3730 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3731 .flags = AVFMT_SEEK_TO_PTS,
3732 .priv_data_size = sizeof(MXFContext),
3733 .read_probe = mxf_probe,
3734 .read_header = mxf_read_header,
3735 .read_packet = mxf_read_packet,
3736 .read_close = mxf_read_close,
3737 .read_seek = mxf_read_seek,
3738 .priv_class = &demuxer_class,