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 MXFTimecodeComponent {
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;
210 UID color_primaries_ul;
215 typedef struct MXFIndexTableSegment {
217 enum MXFMetadataSetType type;
218 int edit_unit_byte_count;
221 AVRational index_edit_rate;
222 uint64_t index_start_position;
223 uint64_t index_duration;
224 int8_t *temporal_offset_entries;
226 uint64_t *stream_offset_entries;
227 int nb_index_entries;
228 } MXFIndexTableSegment;
230 typedef struct MXFPackage {
232 enum MXFMetadataSetType type;
237 MXFDescriptor *descriptor; /* only one */
244 typedef struct MXFEssenceContainerData {
246 enum MXFMetadataSetType type;
251 } MXFEssenceContainerData;
253 typedef struct MXFMetadataSet {
255 enum MXFMetadataSetType type;
258 /* decoded index table */
259 typedef struct MXFIndexTable {
262 int nb_ptses; /* number of PTSes or total duration of index */
263 int64_t first_dts; /* DTS = EditUnit + first_dts */
264 int64_t *ptses; /* maps EditUnit -> PTS */
266 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
267 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
268 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
271 typedef struct MXFContext {
272 const AVClass *class; /**< Class for private options. */
273 MXFPartition *partitions;
274 unsigned partitions_count;
278 UID *essence_container_data_refs;
279 int essence_container_data_count;
280 MXFMetadataSet **metadata_sets;
281 int metadata_sets_count;
285 int local_tags_count;
286 uint64_t footer_partition;
287 KLVPacket current_klv_data;
289 MXFPartition *current_partition;
290 int parsing_backward;
291 int64_t last_forward_tell;
292 int last_forward_partition;
294 MXFIndexTable *index_tables;
298 /* NOTE: klv_offset is not set (-1) for local keys */
299 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
301 typedef struct MXFMetadataReadTableEntry {
303 MXFMetadataReadFunc *read;
305 enum MXFMetadataSetType type;
306 } MXFMetadataReadTableEntry;
308 static int mxf_read_close(AVFormatContext *s);
310 /* partial keys to match */
311 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
312 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
313 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
314 static const uint8_t mxf_canopus_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x0a,0x0e,0x0f,0x03,0x01 };
315 static const uint8_t mxf_system_item_key_cp[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
316 static const uint8_t mxf_system_item_key_gc[] = { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x03,0x01,0x14 };
317 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
318 /* complete keys to match */
319 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 };
320 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
321 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
322 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 };
323 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
324 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
325 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
326 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 };
327 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 };
329 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
331 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
333 MXFIndexTableSegment *seg;
334 switch ((*ctx)->type) {
336 av_freep(&((MXFDescriptor *)*ctx)->extradata);
338 case MultipleDescriptor:
339 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
342 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
345 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
348 case MaterialPackage:
349 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
350 av_freep(&((MXFPackage *)*ctx)->name);
351 av_freep(&((MXFPackage *)*ctx)->comment_refs);
354 av_freep(&((MXFTaggedValue *)*ctx)->name);
355 av_freep(&((MXFTaggedValue *)*ctx)->value);
358 av_freep(&((MXFTrack *)*ctx)->name);
360 case IndexTableSegment:
361 seg = (MXFIndexTableSegment *)*ctx;
362 av_freep(&seg->temporal_offset_entries);
363 av_freep(&seg->flag_entries);
364 av_freep(&seg->stream_offset_entries);
373 static int64_t klv_decode_ber_length(AVIOContext *pb)
375 uint64_t size = avio_r8(pb);
376 if (size & 0x80) { /* long form */
377 int bytes_num = size & 0x7f;
378 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
380 return AVERROR_INVALIDDATA;
383 size = size << 8 | avio_r8(pb);
385 if (size > INT64_MAX)
386 return AVERROR_INVALIDDATA;
390 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
393 for (i = 0; i < size && !avio_feof(pb); i++) {
397 else if (b != key[i])
403 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
406 if (!mxf_read_sync(pb, mxf_klv_key, 4))
407 return AVERROR_INVALIDDATA;
408 klv->offset = avio_tell(pb) - 4;
409 memcpy(klv->key, mxf_klv_key, 4);
410 avio_read(pb, klv->key + 4, 12);
411 length = klv_decode_ber_length(pb);
414 klv->length = length;
416 if (pos > INT64_MAX - length)
417 return AVERROR_INVALIDDATA;
418 klv->next_klv = pos + length;
422 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv, int body_sid)
426 for (i = 0; i < s->nb_streams; i++) {
427 MXFTrack *track = s->streams[i]->priv_data;
429 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)))
432 /* return 0 if only one stream, for OP Atom files with 0 as track number */
433 return s->nb_streams == 1 && s->streams[0]->priv_data ? 0 : -1;
436 static int find_body_sid_by_absolute_offset(MXFContext *mxf, int64_t offset)
438 // we look for partition where the offset is placed
443 b = mxf->partitions_count;
447 pack_ofs = mxf->partitions[m].pack_ofs;
448 if (pack_ofs <= offset)
456 return mxf->partitions[a].body_sid;
459 static int mxf_get_eia608_packet(AVFormatContext *s, AVStream *st, AVPacket *pkt, int64_t length)
461 int count = avio_rb16(s->pb);
462 int cdp_identifier, cdp_length, cdp_footer_id, ccdata_id, cc_count;
463 int line_num, sample_coding, sample_count;
464 int did, sdid, data_length;
468 av_log(s, AV_LOG_WARNING, "unsupported multiple ANC packets (%d) per KLV packet\n", count);
470 for (i = 0; i < count; i++) {
472 av_log(s, AV_LOG_ERROR, "error reading s436m packet %"PRId64"\n", length);
473 return AVERROR_INVALIDDATA;
475 line_num = avio_rb16(s->pb);
476 avio_r8(s->pb); // wrapping type
477 sample_coding = avio_r8(s->pb);
478 sample_count = avio_rb16(s->pb);
479 length -= 6 + 8 + sample_count;
480 if (line_num != 9 && line_num != 11)
482 if (sample_coding == 7 || sample_coding == 8 || sample_coding == 9) {
483 av_log(s, AV_LOG_WARNING, "unsupported s436m 10 bit sample coding\n");
487 return AVERROR_INVALIDDATA;
489 avio_rb32(s->pb); // array count
490 avio_rb32(s->pb); // array elem size
491 did = avio_r8(s->pb);
492 sdid = avio_r8(s->pb);
493 data_length = avio_r8(s->pb);
494 if (did != 0x61 || sdid != 1) {
495 av_log(s, AV_LOG_WARNING, "unsupported did or sdid: %x %x\n", did, sdid);
498 cdp_identifier = avio_rb16(s->pb); // cdp id
499 if (cdp_identifier != 0x9669) {
500 av_log(s, AV_LOG_ERROR, "wrong cdp identifier %x\n", cdp_identifier);
501 return AVERROR_INVALIDDATA;
503 cdp_length = avio_r8(s->pb);
504 avio_r8(s->pb); // cdp_frame_rate
505 avio_r8(s->pb); // cdp_flags
506 avio_rb16(s->pb); // cdp_hdr_sequence_cntr
507 ccdata_id = avio_r8(s->pb); // ccdata_id
508 if (ccdata_id != 0x72) {
509 av_log(s, AV_LOG_ERROR, "wrong cdp data section %x\n", ccdata_id);
510 return AVERROR_INVALIDDATA;
512 cc_count = avio_r8(s->pb) & 0x1f;
513 ret = av_get_packet(s->pb, pkt, cc_count * 3);
516 if (cdp_length - 9 - 4 < cc_count * 3) {
517 av_log(s, AV_LOG_ERROR, "wrong cdp size %d cc count %d\n", cdp_length, cc_count);
518 return AVERROR_INVALIDDATA;
520 avio_skip(s->pb, data_length - 9 - 4 - cc_count * 3);
521 cdp_footer_id = avio_r8(s->pb);
522 if (cdp_footer_id != 0x74) {
523 av_log(s, AV_LOG_ERROR, "wrong cdp footer section %x\n", cdp_footer_id);
524 return AVERROR_INVALIDDATA;
526 avio_rb16(s->pb); // cdp_ftr_sequence_cntr
527 avio_r8(s->pb); // packet_checksum
534 /* XXX: use AVBitStreamFilter */
535 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
537 const uint8_t *buf_ptr, *end_ptr;
541 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
542 return AVERROR_INVALIDDATA;
543 length = av_get_packet(pb, pkt, length);
546 data_ptr = pkt->data;
547 end_ptr = pkt->data + length;
548 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
549 for (; end_ptr - buf_ptr >= st->codecpar->channels * 4; ) {
550 for (i = 0; i < st->codecpar->channels; i++) {
551 uint32_t sample = bytestream_get_le32(&buf_ptr);
552 if (st->codecpar->bits_per_coded_sample == 24)
553 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
555 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
557 buf_ptr += 32 - st->codecpar->channels*4; // always 8 channels stored SMPTE 331M
559 av_shrink_packet(pkt, data_ptr - pkt->data);
563 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
565 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
566 MXFContext *mxf = s->priv_data;
567 AVIOContext *pb = s->pb;
568 int64_t end = avio_tell(pb) + klv->length;
571 uint64_t plaintext_size;
577 if (!mxf->aesc && s->key && s->keylen == 16) {
578 mxf->aesc = av_aes_alloc();
580 return AVERROR(ENOMEM);
581 av_aes_init(mxf->aesc, s->key, 128, 1);
584 size = klv_decode_ber_length(pb);
589 klv_decode_ber_length(pb);
590 plaintext_size = avio_rb64(pb);
592 klv_decode_ber_length(pb);
593 avio_read(pb, klv->key, 16);
594 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
595 return AVERROR_INVALIDDATA;
597 body_sid = find_body_sid_by_absolute_offset(mxf, klv->offset);
598 index = mxf_get_stream_index(s, klv, body_sid);
600 return AVERROR_INVALIDDATA;
602 klv_decode_ber_length(pb);
603 orig_size = avio_rb64(pb);
604 if (orig_size < plaintext_size)
605 return AVERROR_INVALIDDATA;
607 size = klv_decode_ber_length(pb);
608 if (size < 32 || size - 32 < orig_size)
609 return AVERROR_INVALIDDATA;
610 avio_read(pb, ivec, 16);
611 avio_read(pb, tmpbuf, 16);
613 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
614 if (memcmp(tmpbuf, checkv, 16))
615 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
617 size = av_get_packet(pb, pkt, size);
620 else if (size < plaintext_size)
621 return AVERROR_INVALIDDATA;
622 size -= plaintext_size;
624 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
625 &pkt->data[plaintext_size], size >> 4, ivec, 1);
626 av_shrink_packet(pkt, orig_size);
627 pkt->stream_index = index;
628 avio_skip(pb, end - avio_tell(pb));
632 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
634 MXFContext *mxf = arg;
635 int item_num = avio_rb32(pb);
636 int item_len = avio_rb32(pb);
638 if (item_len != 18) {
639 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
640 return AVERROR_PATCHWELCOME;
642 if (item_num > 65536 || item_num < 0) {
643 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
644 return AVERROR_INVALIDDATA;
647 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
648 av_free(mxf->local_tags);
649 mxf->local_tags_count = 0;
650 mxf->local_tags = av_calloc(item_num, item_len);
651 if (!mxf->local_tags)
652 return AVERROR(ENOMEM);
653 mxf->local_tags_count = item_num;
654 avio_read(pb, mxf->local_tags, item_num*item_len);
658 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
660 MXFContext *mxf = arg;
661 AVFormatContext *s = mxf->fc;
662 MXFPartition *partition, *tmp_part;
664 uint64_t footer_partition;
665 uint32_t nb_essence_containers;
667 if (mxf->partitions_count >= INT_MAX / 2)
668 return AVERROR_INVALIDDATA;
670 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
672 return AVERROR(ENOMEM);
673 mxf->partitions = tmp_part;
675 if (mxf->parsing_backward) {
676 /* insert the new partition pack in the middle
677 * this makes the entries in mxf->partitions sorted by offset */
678 memmove(&mxf->partitions[mxf->last_forward_partition+1],
679 &mxf->partitions[mxf->last_forward_partition],
680 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
681 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
683 mxf->last_forward_partition++;
684 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
687 memset(partition, 0, sizeof(*partition));
688 mxf->partitions_count++;
689 partition->pack_length = avio_tell(pb) - klv_offset + size;
690 partition->pack_ofs = klv_offset;
694 partition->type = Header;
697 partition->type = BodyPartition;
700 partition->type = Footer;
703 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
704 return AVERROR_INVALIDDATA;
707 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
708 partition->closed = partition->type == Footer || !(uid[14] & 1);
709 partition->complete = uid[14] > 2;
711 partition->kag_size = avio_rb32(pb);
712 partition->this_partition = avio_rb64(pb);
713 partition->previous_partition = avio_rb64(pb);
714 footer_partition = avio_rb64(pb);
715 partition->header_byte_count = avio_rb64(pb);
716 partition->index_byte_count = avio_rb64(pb);
717 partition->index_sid = avio_rb32(pb);
718 partition->body_offset = avio_rb64(pb);
719 partition->body_sid = avio_rb32(pb);
720 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
721 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
722 return AVERROR_INVALIDDATA;
724 nb_essence_containers = avio_rb32(pb);
726 if (partition->type == Header) {
728 snprintf(str, sizeof(str), "%08x.%08x.%08x.%08x", AV_RB32(&op[0]), AV_RB32(&op[4]), AV_RB32(&op[8]), AV_RB32(&op[12]));
729 av_dict_set(&s->metadata, "operational_pattern_ul", str, 0);
732 if (partition->this_partition &&
733 partition->previous_partition == partition->this_partition) {
734 av_log(mxf->fc, AV_LOG_ERROR,
735 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
736 partition->previous_partition);
737 /* override with the actual previous partition offset */
738 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
740 mxf->partitions + mxf->last_forward_partition - 2;
741 partition->previous_partition = prev->this_partition;
743 /* if no previous body partition are found point to the header
745 if (partition->previous_partition == partition->this_partition)
746 partition->previous_partition = 0;
747 av_log(mxf->fc, AV_LOG_ERROR,
748 "Overriding PreviousPartition with %"PRIx64"\n",
749 partition->previous_partition);
752 /* some files don't have FooterPartition set in every partition */
753 if (footer_partition) {
754 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
755 av_log(mxf->fc, AV_LOG_ERROR,
756 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
757 mxf->footer_partition, footer_partition);
759 mxf->footer_partition = footer_partition;
763 av_log(mxf->fc, AV_LOG_TRACE,
764 "PartitionPack: ThisPartition = 0x%"PRIX64
765 ", PreviousPartition = 0x%"PRIX64", "
766 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
767 partition->this_partition,
768 partition->previous_partition, footer_partition,
769 partition->index_sid, partition->body_sid);
771 /* sanity check PreviousPartition if set */
772 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
773 if (partition->previous_partition &&
774 mxf->run_in + partition->previous_partition >= klv_offset) {
775 av_log(mxf->fc, AV_LOG_ERROR,
776 "PreviousPartition points to this partition or forward\n");
777 return AVERROR_INVALIDDATA;
780 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
781 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
782 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
783 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
784 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
785 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
786 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
787 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
788 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
789 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
790 else if (op[12] == 0x10) {
791 /* SMPTE 390m: "There shall be exactly one essence container"
792 * The following block deals with files that violate this, namely:
793 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
794 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
795 if (nb_essence_containers != 1) {
796 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
800 av_log(mxf->fc, AV_LOG_WARNING,
801 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
802 nb_essence_containers,
803 op == OP1a ? "OP1a" : "OPAtom");
809 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
813 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
814 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
815 partition->kag_size);
817 if (mxf->op == OPSONYOpt)
818 partition->kag_size = 512;
820 partition->kag_size = 1;
822 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
828 static int mxf_add_metadata_set(MXFContext *mxf, MXFMetadataSet **metadata_set)
830 MXFMetadataSet **tmp;
832 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
834 mxf_free_metadataset(metadata_set, 1);
835 return AVERROR(ENOMEM);
837 mxf->metadata_sets = tmp;
838 mxf->metadata_sets[mxf->metadata_sets_count] = *metadata_set;
839 mxf->metadata_sets_count++;
843 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
845 MXFCryptoContext *cryptocontext = arg;
847 return AVERROR_INVALIDDATA;
848 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
849 avio_read(pb, cryptocontext->source_container_ul, 16);
853 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
855 *count = avio_rb32(pb);
857 *refs = av_calloc(*count, sizeof(UID));
860 return AVERROR(ENOMEM);
862 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
863 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
867 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
872 if (size < 0 || size > INT_MAX/2)
873 return AVERROR(EINVAL);
875 buf_size = size + size / 2 + 1;
877 *str = av_malloc(buf_size);
879 return AVERROR(ENOMEM);
882 ret = avio_get_str16be(pb, size, *str, buf_size);
884 ret = avio_get_str16le(pb, size, *str, buf_size);
894 #define READ_STR16(type, big_endian) \
895 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
897 return mxf_read_utf16_string(pb, size, str, big_endian); \
903 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
905 MXFContext *mxf = arg;
908 if (mxf->packages_refs)
909 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
910 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
912 return mxf_read_strong_ref_array(pb, &mxf->essence_container_data_refs, &mxf->essence_container_data_count);
917 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
919 MXFStructuralComponent *source_clip = arg;
922 source_clip->duration = avio_rb64(pb);
925 source_clip->start_position = avio_rb64(pb);
928 /* UMID, only get last 16 bytes */
929 avio_read(pb, source_clip->source_package_ul, 16);
930 avio_read(pb, source_clip->source_package_uid, 16);
933 source_clip->source_track_id = avio_rb32(pb);
939 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
941 MXFTimecodeComponent *mxf_timecode = arg;
944 mxf_timecode->start_frame = avio_rb64(pb);
947 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
950 mxf_timecode->drop_frame = avio_r8(pb);
956 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
958 MXFPulldownComponent *mxf_pulldown = arg;
961 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
967 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
969 MXFTrack *track = arg;
972 track->track_id = avio_rb32(pb);
975 avio_read(pb, track->track_number, 4);
978 mxf_read_utf16be_string(pb, size, &track->name);
981 track->edit_rate.num = avio_rb32(pb);
982 track->edit_rate.den = avio_rb32(pb);
985 avio_read(pb, track->sequence_ref, 16);
991 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
993 MXFSequence *sequence = arg;
996 sequence->duration = avio_rb64(pb);
999 avio_read(pb, sequence->data_definition_ul, 16);
1002 sequence->origin = avio_r8(pb);
1005 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
1006 &sequence->structural_components_count);
1011 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1013 MXFEssenceGroup *essence_group = arg;
1016 essence_group->duration = avio_rb64(pb);
1019 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
1020 &essence_group->structural_components_count);
1025 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1027 MXFPackage *package = arg;
1030 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
1031 &package->tracks_count);
1034 avio_read(pb, package->package_ul, 16);
1035 avio_read(pb, package->package_uid, 16);
1038 avio_read(pb, package->descriptor_ref, 16);
1041 return mxf_read_utf16be_string(pb, size, &package->name);
1043 return mxf_read_strong_ref_array(pb, &package->comment_refs,
1044 &package->comment_count);
1049 static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1051 MXFEssenceContainerData *essence_data = arg;
1054 /* linked package umid UMID */
1055 avio_read(pb, essence_data->package_ul, 16);
1056 avio_read(pb, essence_data->package_uid, 16);
1059 essence_data->index_sid = avio_rb32(pb);
1062 essence_data->body_sid = avio_rb32(pb);
1068 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
1072 segment->nb_index_entries = avio_rb32(pb);
1074 length = avio_rb32(pb);
1075 if(segment->nb_index_entries && length < 11)
1076 return AVERROR_INVALIDDATA;
1078 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
1079 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
1080 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
1081 av_freep(&segment->temporal_offset_entries);
1082 av_freep(&segment->flag_entries);
1083 return AVERROR(ENOMEM);
1086 for (i = 0; i < segment->nb_index_entries; i++) {
1088 return AVERROR_INVALIDDATA;
1089 segment->temporal_offset_entries[i] = avio_r8(pb);
1090 avio_r8(pb); /* KeyFrameOffset */
1091 segment->flag_entries[i] = avio_r8(pb);
1092 segment->stream_offset_entries[i] = avio_rb64(pb);
1093 avio_skip(pb, length - 11);
1098 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1100 MXFIndexTableSegment *segment = arg;
1103 segment->edit_unit_byte_count = avio_rb32(pb);
1104 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
1107 segment->index_sid = avio_rb32(pb);
1108 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
1111 segment->body_sid = avio_rb32(pb);
1112 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
1115 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
1116 return mxf_read_index_entry_array(pb, segment);
1118 segment->index_edit_rate.num = avio_rb32(pb);
1119 segment->index_edit_rate.den = avio_rb32(pb);
1120 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
1121 segment->index_edit_rate.den);
1124 segment->index_start_position = avio_rb64(pb);
1125 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
1128 segment->index_duration = avio_rb64(pb);
1129 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
1135 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
1137 int code, value, ofs = 0;
1138 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
1142 value = avio_r8(pb);
1143 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
1146 layout[ofs++] = code;
1147 layout[ofs++] = value;
1149 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
1150 } while (code != 0); /* SMPTE 377M E.2.46 */
1152 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
1155 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1157 MXFDescriptor *descriptor = arg;
1158 int entry_count, entry_size;
1162 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
1163 &descriptor->sub_descriptors_count);
1164 case 0x3002: /* ContainerDuration */
1165 descriptor->duration = avio_rb64(pb);
1168 avio_read(pb, descriptor->essence_container_ul, 16);
1171 avio_read(pb, descriptor->codec_ul, 16);
1174 descriptor->linked_track_id = avio_rb32(pb);
1176 case 0x3201: /* PictureEssenceCoding */
1177 avio_read(pb, descriptor->essence_codec_ul, 16);
1180 descriptor->width = avio_rb32(pb);
1183 descriptor->height = avio_rb32(pb);
1186 descriptor->frame_layout = avio_r8(pb);
1189 entry_count = avio_rb32(pb);
1190 entry_size = avio_rb32(pb);
1191 if (entry_size == 4) {
1192 if (entry_count > 0)
1193 descriptor->video_line_map[0] = avio_rb32(pb);
1195 descriptor->video_line_map[0] = 0;
1196 if (entry_count > 1)
1197 descriptor->video_line_map[1] = avio_rb32(pb);
1199 descriptor->video_line_map[1] = 0;
1201 av_log(NULL, AV_LOG_WARNING, "VideoLineMap element size %d currently not supported\n", entry_size);
1204 descriptor->aspect_ratio.num = avio_rb32(pb);
1205 descriptor->aspect_ratio.den = avio_rb32(pb);
1208 avio_read(pb, descriptor->color_trc_ul, 16);
1211 descriptor->field_dominance = avio_r8(pb);
1214 avio_read(pb, descriptor->color_primaries_ul, 16);
1217 avio_read(pb, descriptor->color_space_ul, 16);
1220 descriptor->component_depth = avio_rb32(pb);
1223 descriptor->horiz_subsampling = avio_rb32(pb);
1226 descriptor->vert_subsampling = avio_rb32(pb);
1229 descriptor->sample_rate.num = avio_rb32(pb);
1230 descriptor->sample_rate.den = avio_rb32(pb);
1232 case 0x3D06: /* SoundEssenceCompression */
1233 avio_read(pb, descriptor->essence_codec_ul, 16);
1236 descriptor->channels = avio_rb32(pb);
1239 descriptor->bits_per_sample = avio_rb32(pb);
1242 mxf_read_pixel_layout(pb, descriptor);
1245 /* Private uid used by SONY C0023S01.mxf */
1246 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1247 if (descriptor->extradata)
1248 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1249 av_free(descriptor->extradata);
1250 descriptor->extradata_size = 0;
1251 descriptor->extradata = av_malloc(size);
1252 if (!descriptor->extradata)
1253 return AVERROR(ENOMEM);
1254 descriptor->extradata_size = size;
1255 avio_read(pb, descriptor->extradata, size);
1257 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1258 uint32_t rsiz = avio_rb16(pb);
1259 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1260 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1261 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1268 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1270 MXFTaggedValue *tagged_value = arg;
1276 avio_read(pb, key, 17);
1277 /* TODO: handle other types of of indirect values */
1278 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1279 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1280 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1281 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1286 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1288 MXFTaggedValue *tagged_value = arg;
1291 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1293 return mxf_read_indirect_value(tagged_value, pb, size);
1299 * Match an uid independently of the version byte and up to len common bytes
1302 static int mxf_match_uid(const UID key, const UID uid, int len)
1305 for (i = 0; i < len; i++) {
1306 if (i != 7 && key[i] != uid[i])
1312 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1314 while (uls->uid[0]) {
1315 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1322 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1328 for (i = 0; i < mxf->metadata_sets_count; i++) {
1329 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1330 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1331 return mxf->metadata_sets[i];
1337 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1338 // video essence container uls
1339 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000, NULL, 14 },
1340 { { 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 */
1341 { { 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 */
1342 { { 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 */
1343 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x14,0x01,0x00 }, 14, AV_CODEC_ID_TIFF, NULL, 14 }, /* TIFF */
1344 { { 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 */
1345 { { 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 */
1346 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x1c,0x01,0x00 }, 14, AV_CODEC_ID_PRORES, NULL, 14 }, /* ProRes */
1347 { { 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 */
1348 { { 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 */
1349 { { 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 */
1350 { { 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 */
1351 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x01,0x01 }, 15, AV_CODEC_ID_HQ_HQA },
1352 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x02,0x01 }, 15, AV_CODEC_ID_HQX },
1353 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x15,0x00,0x04,0x02,0x10,0x00,0x01 }, 16, AV_CODEC_ID_HEVC, NULL, 15 }, /* Canon XF-HEVC */
1354 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1355 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1358 /* EC ULs for intra-only formats */
1359 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1360 { { 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 */
1361 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1364 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1365 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1366 { { 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 */
1367 { { 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 */
1368 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1371 /* actual coded width for AVC-Intra to allow selecting correct SPS/PPS */
1372 static const MXFCodecUL mxf_intra_only_picture_coded_width[] = {
1373 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x01 }, 16, 1440 },
1374 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x02 }, 16, 1440 },
1375 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x03 }, 16, 1440 },
1376 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x04 }, 16, 1440 },
1377 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 0 },
1380 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1381 // sound essence container uls
1382 { { 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 */
1383 { { 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 */
1384 { { 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 */
1385 { { 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 */
1386 { { 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) */
1387 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1390 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1391 { { 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 },
1392 { { 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 },
1393 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x13,0x01,0x01 }, 16, AV_CODEC_ID_TTML },
1394 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1397 static MXFWrappingScheme mxf_get_wrapping_kind(UID *essence_container_ul)
1400 const MXFCodecUL *codec_ul;
1402 codec_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1403 if (!codec_ul->uid[0])
1404 codec_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1405 if (!codec_ul->uid[0])
1406 codec_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
1407 if (!codec_ul->uid[0] || !codec_ul->wrapping_indicator_pos)
1408 return UnknownWrapped;
1410 val = (*essence_container_ul)[codec_ul->wrapping_indicator_pos];
1411 switch (codec_ul->wrapping_indicator_type) {
1416 if (val == 0x03 || val == 0x04)
1425 return FrameWrapped;
1428 return UnknownWrapped;
1431 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1433 int i, j, nb_segments = 0;
1434 MXFIndexTableSegment **unsorted_segments;
1435 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1437 /* count number of segments, allocate arrays and copy unsorted segments */
1438 for (i = 0; i < mxf->metadata_sets_count; i++)
1439 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1443 return AVERROR_INVALIDDATA;
1445 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1446 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1447 av_freep(sorted_segments);
1448 av_free(unsorted_segments);
1449 return AVERROR(ENOMEM);
1452 for (i = nb_segments = 0; i < mxf->metadata_sets_count; i++) {
1453 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
1454 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1455 if (s->edit_unit_byte_count || s->nb_index_entries)
1456 unsorted_segments[nb_segments++] = s;
1458 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1459 s->index_sid, s->index_start_position);
1464 av_freep(sorted_segments);
1465 av_free(unsorted_segments);
1466 return AVERROR_INVALIDDATA;
1469 *nb_sorted_segments = 0;
1471 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1472 for (i = 0; i < nb_segments; i++) {
1473 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1474 uint64_t best_index_duration = 0;
1476 for (j = 0; j < nb_segments; j++) {
1477 MXFIndexTableSegment *s = unsorted_segments[j];
1479 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1480 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1481 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1484 s->body_sid > last_body_sid ||
1485 s->body_sid == last_body_sid && s->index_sid > last_index_sid ||
1486 s->body_sid == last_body_sid && s->index_sid == last_index_sid && s->index_start_position > last_index_start) &&
1488 s->body_sid < best_body_sid ||
1489 s->body_sid == best_body_sid && s->index_sid < best_index_sid ||
1490 s->body_sid == best_body_sid && s->index_sid == best_index_sid && s->index_start_position < best_index_start ||
1491 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)) {
1493 best_body_sid = s->body_sid;
1494 best_index_sid = s->index_sid;
1495 best_index_start = s->index_start_position;
1496 best_index_duration = s->index_duration;
1500 /* no suitable entry found -> we're done */
1504 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1505 last_body_sid = best_body_sid;
1506 last_index_sid = best_index_sid;
1507 last_index_start = best_index_start;
1510 av_free(unsorted_segments);
1516 * Computes the absolute file offset of the given essence container offset
1518 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out, MXFPartition **partition_out)
1520 MXFPartition *last_p = NULL;
1524 return AVERROR(EINVAL);
1527 b = mxf->partitions_count;
1530 m0 = m = (a + b) >> 1;
1532 while (m < b && mxf->partitions[m].body_sid != body_sid)
1535 if (m < b && mxf->partitions[m].body_offset <= offset)
1542 last_p = &mxf->partitions[a];
1544 if (last_p && (!last_p->essence_length || last_p->essence_length > (offset - last_p->body_offset))) {
1545 *offset_out = last_p->essence_offset + (offset - last_p->body_offset);
1547 *partition_out = last_p;
1551 av_log(mxf->fc, AV_LOG_ERROR,
1552 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1555 return AVERROR_INVALIDDATA;
1559 * Returns the end position of the essence container with given BodySID, or zero if unknown
1561 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1563 for (int x = mxf->partitions_count - 1; x >= 0; x--) {
1564 MXFPartition *p = &mxf->partitions[x];
1566 if (p->body_sid != body_sid)
1569 if (!p->essence_length)
1572 return p->essence_offset + p->essence_length;
1578 /* EditUnit -> absolute offset */
1579 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)
1582 int64_t offset_temp = 0;
1584 edit_unit = av_rescale_q(edit_unit, index_table->segments[0]->index_edit_rate, edit_rate);
1586 for (i = 0; i < index_table->nb_segments; i++) {
1587 MXFIndexTableSegment *s = index_table->segments[i];
1589 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1591 if (edit_unit < s->index_start_position + s->index_duration) {
1592 int64_t index = edit_unit - s->index_start_position;
1594 if (s->edit_unit_byte_count)
1595 offset_temp += s->edit_unit_byte_count * index;
1597 if (s->nb_index_entries == 2 * s->index_duration + 1)
1598 index *= 2; /* Avid index */
1600 if (index < 0 || index >= s->nb_index_entries) {
1601 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1602 index_table->index_sid, s->index_start_position);
1603 return AVERROR_INVALIDDATA;
1606 offset_temp = s->stream_offset_entries[index];
1610 *edit_unit_out = av_rescale_q(edit_unit, edit_rate, s->index_edit_rate);
1612 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out);
1614 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1615 offset_temp += s->edit_unit_byte_count * s->index_duration;
1620 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);
1622 return AVERROR_INVALIDDATA;
1625 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1628 int8_t max_temporal_offset = -128;
1631 /* first compute how many entries we have */
1632 for (i = 0; i < index_table->nb_segments; i++) {
1633 MXFIndexTableSegment *s = index_table->segments[i];
1635 if (!s->nb_index_entries) {
1636 index_table->nb_ptses = 0;
1637 return 0; /* no TemporalOffsets */
1640 if (s->index_duration > INT_MAX - index_table->nb_ptses) {
1641 index_table->nb_ptses = 0;
1642 av_log(mxf->fc, AV_LOG_ERROR, "ignoring IndexSID %d, duration is too large\n", s->index_sid);
1646 index_table->nb_ptses += s->index_duration;
1649 /* paranoid check */
1650 if (index_table->nb_ptses <= 0)
1653 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1654 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1655 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1656 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1657 av_freep(&index_table->ptses);
1658 av_freep(&index_table->fake_index);
1659 av_freep(&index_table->offsets);
1660 return AVERROR(ENOMEM);
1663 /* we may have a few bad TemporalOffsets
1664 * make sure the corresponding PTSes don't have the bogus value 0 */
1665 for (x = 0; x < index_table->nb_ptses; x++)
1666 index_table->ptses[x] = AV_NOPTS_VALUE;
1680 * We want to transform it into this:
1691 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1692 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1693 * The latter makes DTS <= PTS.
1695 for (i = x = 0; i < index_table->nb_segments; i++) {
1696 MXFIndexTableSegment *s = index_table->segments[i];
1697 int index_delta = 1;
1698 int n = s->nb_index_entries;
1700 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1701 index_delta = 2; /* Avid index */
1702 /* ignore the last entry - it's the size of the essence container */
1706 for (j = 0; j < n; j += index_delta, x++) {
1707 int offset = s->temporal_offset_entries[j] / index_delta;
1708 int index = x + offset;
1710 if (x >= index_table->nb_ptses) {
1711 av_log(mxf->fc, AV_LOG_ERROR,
1712 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1713 s->nb_index_entries, s->index_duration);
1717 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1719 if (index < 0 || index >= index_table->nb_ptses) {
1720 av_log(mxf->fc, AV_LOG_ERROR,
1721 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1726 index_table->offsets[x] = offset;
1727 index_table->ptses[index] = x;
1728 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1732 /* calculate the fake index table in display order */
1733 for (x = 0; x < index_table->nb_ptses; x++) {
1734 index_table->fake_index[x].timestamp = x;
1735 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1736 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1740 index_table->first_dts = -max_temporal_offset;
1746 * Sorts and collects index table segments into index tables.
1747 * Also computes PTSes if possible.
1749 static int mxf_compute_index_tables(MXFContext *mxf)
1751 int i, j, k, ret, nb_sorted_segments;
1752 MXFIndexTableSegment **sorted_segments = NULL;
1754 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1755 nb_sorted_segments <= 0) {
1756 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1760 /* sanity check and count unique BodySIDs/IndexSIDs */
1761 for (i = 0; i < nb_sorted_segments; i++) {
1762 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1763 mxf->nb_index_tables++;
1764 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1765 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1766 ret = AVERROR_INVALIDDATA;
1767 goto finish_decoding_index;
1771 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1772 sizeof(*mxf->index_tables));
1773 if (!mxf->index_tables) {
1774 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1775 ret = AVERROR(ENOMEM);
1776 goto finish_decoding_index;
1779 /* distribute sorted segments to index tables */
1780 for (i = j = 0; i < nb_sorted_segments; i++) {
1781 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1786 mxf->index_tables[j].nb_segments++;
1789 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1790 MXFIndexTable *t = &mxf->index_tables[j];
1791 MXFTrack *mxf_track = NULL;
1793 t->segments = av_mallocz_array(t->nb_segments,
1794 sizeof(*t->segments));
1797 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1798 " pointer array\n");
1799 ret = AVERROR(ENOMEM);
1800 goto finish_decoding_index;
1803 if (sorted_segments[i]->index_start_position)
1804 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1805 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1807 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1808 t->index_sid = sorted_segments[i]->index_sid;
1809 t->body_sid = sorted_segments[i]->body_sid;
1811 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1812 goto finish_decoding_index;
1814 for (k = 0; k < mxf->fc->nb_streams; k++) {
1815 MXFTrack *track = mxf->fc->streams[k]->priv_data;
1816 if (track && track->index_sid == t->index_sid) {
1822 /* fix zero IndexDurations */
1823 for (k = 0; k < t->nb_segments; k++) {
1824 if (!t->segments[k]->index_edit_rate.num || !t->segments[k]->index_edit_rate.den) {
1825 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has invalid IndexEditRate\n",
1828 t->segments[k]->index_edit_rate = mxf_track->edit_rate;
1831 if (t->segments[k]->index_duration)
1834 if (t->nb_segments > 1)
1835 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1839 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1843 /* assume the first stream's duration is reasonable
1844 * leave index_duration = 0 on further segments in case we have any (unlikely)
1846 t->segments[k]->index_duration = mxf_track->original_duration;
1852 finish_decoding_index:
1853 av_free(sorted_segments);
1857 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1859 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1860 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1861 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1862 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1865 static int mxf_uid_to_str(UID uid, char **str)
1869 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1871 return AVERROR(ENOMEM);
1872 for (i = 0; i < sizeof(UID); i++) {
1873 snprintf(p, 2 + 1, "%.2x", uid[i]);
1875 if (i == 3 || i == 5 || i == 7 || i == 9) {
1876 snprintf(p, 1 + 1, "-");
1883 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1887 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1889 return AVERROR(ENOMEM);
1890 snprintf(p, 2 + 1, "0x");
1892 for (i = 0; i < sizeof(UID); i++) {
1893 snprintf(p, 2 + 1, "%.2X", ul[i]);
1897 for (i = 0; i < sizeof(UID); i++) {
1898 snprintf(p, 2 + 1, "%.2X", uid[i]);
1904 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1910 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1912 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1916 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1918 char buf[AV_TIMECODE_STR_SIZE];
1919 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1924 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1926 MXFStructuralComponent *component = NULL;
1927 MXFPulldownComponent *pulldown = NULL;
1929 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1933 switch (component->type) {
1934 case TimecodeComponent:
1935 return (MXFTimecodeComponent*)component;
1936 case PulldownComponent: /* timcode component may be located on a pulldown component */
1937 pulldown = (MXFPulldownComponent*)component;
1938 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1945 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_ul, UID package_uid)
1947 MXFPackage *package = NULL;
1950 for (i = 0; i < mxf->packages_count; i++) {
1951 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1955 if (!memcmp(package->package_ul, package_ul, 16) && !memcmp(package->package_uid, package_uid, 16))
1961 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1963 MXFDescriptor *sub_descriptor = NULL;
1969 if (descriptor->type == MultipleDescriptor) {
1970 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1971 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1973 if (!sub_descriptor) {
1974 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1977 if (sub_descriptor->linked_track_id == track_id) {
1978 return sub_descriptor;
1981 } else if (descriptor->type == Descriptor)
1987 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1989 MXFStructuralComponent *component = NULL;
1990 MXFPackage *package = NULL;
1991 MXFDescriptor *descriptor = NULL;
1994 if (!essence_group || !essence_group->structural_components_count)
1997 /* essence groups contains multiple representations of the same media,
1998 this return the first components with a valid Descriptor typically index 0 */
1999 for (i =0; i < essence_group->structural_components_count; i++){
2000 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
2004 if (!(package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid)))
2007 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
2014 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
2016 MXFStructuralComponent *component = NULL;
2018 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
2021 switch (component->type) {
2025 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
2032 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
2034 MXFTaggedValue *tag;
2038 for (i = 0; i < package->comment_count; i++) {
2039 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
2040 if (!tag || !tag->name || !tag->value)
2043 key = av_asprintf("comment_%s", tag->name);
2045 return AVERROR(ENOMEM);
2047 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
2052 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
2054 MXFPackage *physical_package = NULL;
2055 MXFTrack *physical_track = NULL;
2056 MXFStructuralComponent *sourceclip = NULL;
2057 MXFTimecodeComponent *mxf_tc = NULL;
2061 int64_t start_position;
2063 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
2064 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
2068 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_ul, sourceclip->source_package_uid)))
2071 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
2073 /* the name of physical source package is name of the reel or tape */
2074 if (physical_package->name && physical_package->name[0])
2075 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
2077 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
2078 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
2080 for (j = 0; j < physical_package->tracks_count; j++) {
2081 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
2082 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2086 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
2087 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2091 if (physical_track->edit_rate.num <= 0 ||
2092 physical_track->edit_rate.den <= 0) {
2093 av_log(mxf->fc, AV_LOG_WARNING,
2094 "Invalid edit rate (%d/%d) found on structural"
2095 " component #%d, defaulting to 25/1\n",
2096 physical_track->edit_rate.num,
2097 physical_track->edit_rate.den, i);
2098 physical_track->edit_rate = (AVRational){25, 1};
2101 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
2102 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
2105 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2106 /* scale sourceclip start_position to match physical track edit rate */
2107 start_position = av_rescale_q(sourceclip->start_position,
2108 physical_track->edit_rate,
2109 source_track->edit_rate);
2111 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
2112 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
2122 static int mxf_add_metadata_stream(MXFContext *mxf, MXFTrack *track)
2124 MXFStructuralComponent *component = NULL;
2125 const MXFCodecUL *codec_ul = NULL;
2126 MXFPackage tmp_package;
2130 for (j = 0; j < track->sequence->structural_components_count; j++) {
2131 component = mxf_resolve_sourceclip(mxf, &track->sequence->structural_components_refs[j]);
2139 st = avformat_new_stream(mxf->fc, NULL);
2141 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate metadata stream\n");
2142 return AVERROR(ENOMEM);
2145 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
2146 st->codecpar->codec_id = AV_CODEC_ID_NONE;
2147 st->id = track->track_id;
2149 memcpy(&tmp_package.package_ul, component->source_package_ul, 16);
2150 memcpy(&tmp_package.package_uid, component->source_package_uid, 16);
2151 mxf_add_umid_metadata(&st->metadata, "file_package_umid", &tmp_package);
2152 if (track->name && track->name[0])
2153 av_dict_set(&st->metadata, "track_name", track->name, 0);
2155 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &track->sequence->data_definition_ul);
2156 av_dict_set(&st->metadata, "data_type", av_get_media_type_string(codec_ul->id), 0);
2160 static int mxf_parse_structural_metadata(MXFContext *mxf)
2162 MXFPackage *material_package = NULL;
2165 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
2166 /* TODO: handle multiple material packages (OP3x) */
2167 for (i = 0; i < mxf->packages_count; i++) {
2168 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
2169 if (material_package) break;
2171 if (!material_package) {
2172 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
2173 return AVERROR_INVALIDDATA;
2176 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
2177 if (material_package->name && material_package->name[0])
2178 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
2179 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
2181 for (i = 0; i < material_package->tracks_count; i++) {
2182 MXFPackage *source_package = NULL;
2183 MXFTrack *material_track = NULL;
2184 MXFTrack *source_track = NULL;
2185 MXFTrack *temp_track = NULL;
2186 MXFDescriptor *descriptor = NULL;
2187 MXFStructuralComponent *component = NULL;
2188 MXFTimecodeComponent *mxf_tc = NULL;
2189 UID *essence_container_ul = NULL;
2190 const MXFCodecUL *codec_ul = NULL;
2191 const MXFCodecUL *container_ul = NULL;
2192 const MXFCodecUL *pix_fmt_ul = NULL;
2197 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
2198 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
2202 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
2203 mxf_tc = (MXFTimecodeComponent*)component;
2204 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2205 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2206 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2210 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
2211 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
2215 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2216 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
2220 mxf_tc = (MXFTimecodeComponent*)component;
2221 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
2222 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
2223 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
2228 /* TODO: handle multiple source clips, only finds first valid source clip */
2229 if(material_track->sequence->structural_components_count > 1)
2230 av_log(mxf->fc, AV_LOG_WARNING, "material track %d: has %d components\n",
2231 material_track->track_id, material_track->sequence->structural_components_count);
2233 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
2234 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
2238 source_package = mxf_resolve_source_package(mxf, component->source_package_ul, component->source_package_uid);
2239 if (!source_package) {
2240 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
2243 for (k = 0; k < source_package->tracks_count; k++) {
2244 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
2245 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
2246 ret = AVERROR_INVALIDDATA;
2249 if (temp_track->track_id == component->source_track_id) {
2250 source_track = temp_track;
2254 if (!source_track) {
2255 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
2259 for (k = 0; k < mxf->essence_container_data_count; k++) {
2260 MXFEssenceContainerData *essence_data;
2262 if (!(essence_data = mxf_resolve_strong_ref(mxf, &mxf->essence_container_data_refs[k], EssenceContainerData))) {
2263 av_log(mxf->fc, AV_LOG_TRACE, "could not resolve essence container data strong ref\n");
2266 if (!memcmp(component->source_package_ul, essence_data->package_ul, sizeof(UID)) && !memcmp(component->source_package_uid, essence_data->package_uid, sizeof(UID))) {
2267 source_track->body_sid = essence_data->body_sid;
2268 source_track->index_sid = essence_data->index_sid;
2273 if(source_track && component)
2276 if (!source_track || !component || !source_package) {
2277 if((ret = mxf_add_metadata_stream(mxf, material_track)))
2282 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
2283 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2284 ret = AVERROR_INVALIDDATA;
2288 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
2289 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
2290 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
2291 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
2295 st = avformat_new_stream(mxf->fc, NULL);
2297 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
2298 ret = AVERROR(ENOMEM);
2301 st->id = material_track->track_id;
2302 st->priv_data = source_track;
2304 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
2305 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
2307 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
2308 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
2309 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
2310 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
2312 source_track->original_duration = st->duration = component->duration;
2314 if (st->duration == -1)
2315 st->duration = AV_NOPTS_VALUE;
2316 st->start_time = component->start_position;
2317 if (material_track->edit_rate.num <= 0 ||
2318 material_track->edit_rate.den <= 0) {
2319 av_log(mxf->fc, AV_LOG_WARNING,
2320 "Invalid edit rate (%d/%d) found on stream #%d, "
2321 "defaulting to 25/1\n",
2322 material_track->edit_rate.num,
2323 material_track->edit_rate.den, st->index);
2324 material_track->edit_rate = (AVRational){25, 1};
2326 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
2328 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
2329 * the former is accessible via st->priv_data */
2330 source_track->edit_rate = material_track->edit_rate;
2332 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
2333 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
2334 st->codecpar->codec_type = codec_ul->id;
2337 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
2340 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
2341 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
2342 essence_container_ul = &descriptor->essence_container_ul;
2343 source_track->wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_kind(essence_container_ul);
2344 if (source_track->wrapping == UnknownWrapped)
2345 av_log(mxf->fc, AV_LOG_INFO, "wrapping of stream %d is unknown\n", st->index);
2346 /* HACK: replacing the original key with mxf_encrypted_essence_container
2347 * is not allowed according to s429-6, try to find correct information anyway */
2348 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
2349 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
2350 for (k = 0; k < mxf->metadata_sets_count; k++) {
2351 MXFMetadataSet *metadata = mxf->metadata_sets[k];
2352 if (metadata->type == CryptoContext) {
2353 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
2359 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
2360 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
2361 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2362 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
2363 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
2364 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2367 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
2368 avcodec_get_name(st->codecpar->codec_id));
2369 for (k = 0; k < 16; k++) {
2370 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
2371 descriptor->essence_codec_ul[k]);
2372 if (!(k+1 & 19) || k == 5)
2373 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
2375 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2377 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2378 if (source_package->name && source_package->name[0])
2379 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2380 if (material_track->name && material_track->name[0])
2381 av_dict_set(&st->metadata, "track_name", material_track->name, 0);
2383 mxf_parse_physical_source_package(mxf, source_track, st);
2385 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2386 source_track->intra_only = mxf_is_intra_only(descriptor);
2387 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2388 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2389 st->codecpar->codec_id = container_ul->id;
2390 st->codecpar->width = descriptor->width;
2391 st->codecpar->height = descriptor->height; /* Field height, not frame height */
2392 switch (descriptor->frame_layout) {
2394 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2397 /* Every other line is stored and needs to be duplicated. */
2398 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2399 break; /* The correct thing to do here is fall through, but by breaking we might be
2400 able to decode some streams at half the vertical resolution, rather than not al all.
2401 It's also for compatibility with the old behavior. */
2404 case SegmentedFrame:
2405 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2406 case SeparateFields:
2407 av_log(mxf->fc, AV_LOG_DEBUG, "video_line_map: (%d, %d), field_dominance: %d\n",
2408 descriptor->video_line_map[0], descriptor->video_line_map[1],
2409 descriptor->field_dominance);
2410 if ((descriptor->video_line_map[0] > 0) && (descriptor->video_line_map[1] > 0)) {
2411 /* Detect coded field order from VideoLineMap:
2412 * (even, even) => bottom field coded first
2413 * (even, odd) => top field coded first
2414 * (odd, even) => top field coded first
2415 * (odd, odd) => bottom field coded first
2417 if ((descriptor->video_line_map[0] + descriptor->video_line_map[1]) % 2) {
2418 switch (descriptor->field_dominance) {
2419 case MXF_FIELD_DOMINANCE_DEFAULT:
2420 case MXF_FIELD_DOMINANCE_FF:
2421 st->codecpar->field_order = AV_FIELD_TT;
2423 case MXF_FIELD_DOMINANCE_FL:
2424 st->codecpar->field_order = AV_FIELD_TB;
2427 avpriv_request_sample(mxf->fc,
2428 "Field dominance %d support",
2429 descriptor->field_dominance);
2432 switch (descriptor->field_dominance) {
2433 case MXF_FIELD_DOMINANCE_DEFAULT:
2434 case MXF_FIELD_DOMINANCE_FF:
2435 st->codecpar->field_order = AV_FIELD_BB;
2437 case MXF_FIELD_DOMINANCE_FL:
2438 st->codecpar->field_order = AV_FIELD_BT;
2441 avpriv_request_sample(mxf->fc,
2442 "Field dominance %d support",
2443 descriptor->field_dominance);
2447 /* Turn field height into frame height. */
2448 st->codecpar->height *= 2;
2451 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2454 if (st->codecpar->codec_id == AV_CODEC_ID_PRORES) {
2455 switch (descriptor->essence_codec_ul[14]) {
2456 case 1: st->codecpar->codec_tag = MKTAG('a','p','c','o'); break;
2457 case 2: st->codecpar->codec_tag = MKTAG('a','p','c','s'); break;
2458 case 3: st->codecpar->codec_tag = MKTAG('a','p','c','n'); break;
2459 case 4: st->codecpar->codec_tag = MKTAG('a','p','c','h'); break;
2460 case 5: st->codecpar->codec_tag = MKTAG('a','p','4','h'); break;
2461 case 6: st->codecpar->codec_tag = MKTAG('a','p','4','x'); break;
2465 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
2466 st->codecpar->format = descriptor->pix_fmt;
2467 if (st->codecpar->format == AV_PIX_FMT_NONE) {
2468 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2469 &descriptor->essence_codec_ul);
2470 st->codecpar->format = (enum AVPixelFormat)pix_fmt_ul->id;
2471 if (st->codecpar->format== AV_PIX_FMT_NONE) {
2472 st->codecpar->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2473 &descriptor->essence_codec_ul)->id;
2474 if (!st->codecpar->codec_tag) {
2475 /* support files created before RP224v10 by defaulting to UYVY422
2476 if subsampling is 4:2:2 and component depth is 8-bit */
2477 if (descriptor->horiz_subsampling == 2 &&
2478 descriptor->vert_subsampling == 1 &&
2479 descriptor->component_depth == 8) {
2480 st->codecpar->format = AV_PIX_FMT_UYVY422;
2486 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2487 if (material_track->sequence->origin) {
2488 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2490 if (source_track->sequence->origin) {
2491 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2493 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2494 st->display_aspect_ratio = descriptor->aspect_ratio;
2495 st->codecpar->color_primaries = mxf_get_codec_ul(ff_mxf_color_primaries_uls, &descriptor->color_primaries_ul)->id;
2496 st->codecpar->color_trc = mxf_get_codec_ul(ff_mxf_color_trc_uls, &descriptor->color_trc_ul)->id;
2497 st->codecpar->color_space = mxf_get_codec_ul(ff_mxf_color_space_uls, &descriptor->color_space_ul)->id;
2498 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
2499 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2500 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2501 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))
2502 st->codecpar->codec_id = (enum AVCodecID)container_ul->id;
2503 st->codecpar->channels = descriptor->channels;
2505 if (descriptor->sample_rate.den > 0) {
2506 st->codecpar->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2507 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2509 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2510 "found for stream #%d, time base forced to 1/48000\n",
2511 descriptor->sample_rate.num, descriptor->sample_rate.den,
2513 avpriv_set_pts_info(st, 64, 1, 48000);
2516 /* if duration is set, rescale it from EditRate to SampleRate */
2517 if (st->duration != AV_NOPTS_VALUE)
2518 st->duration = av_rescale_q(st->duration,
2519 av_inv_q(material_track->edit_rate),
2522 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2523 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
2524 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2525 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
2526 else if (descriptor->bits_per_sample == 32)
2527 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
2528 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) {
2529 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2530 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24BE;
2531 else if (descriptor->bits_per_sample == 32)
2532 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
2533 } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
2534 st->need_parsing = AVSTREAM_PARSE_FULL;
2536 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
2537 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
2538 enum AVMediaType type;
2539 container_ul = mxf_get_codec_ul(mxf_data_essence_container_uls, essence_container_ul);
2540 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2541 st->codecpar->codec_id = container_ul->id;
2542 type = avcodec_get_type(st->codecpar->codec_id);
2543 if (type == AVMEDIA_TYPE_SUBTITLE)
2544 st->codecpar->codec_type = type;
2545 if (container_ul->desc)
2546 av_dict_set(&st->metadata, "data_type", container_ul->desc, 0);
2547 if (mxf->eia608_extract &&
2548 !strcmp(container_ul->desc, "vbi_vanc_smpte_436M")) {
2549 st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
2550 st->codecpar->codec_id = AV_CODEC_ID_EIA_608;
2553 if (descriptor->extradata) {
2554 if (!ff_alloc_extradata(st->codecpar, descriptor->extradata_size)) {
2555 memcpy(st->codecpar->extradata, descriptor->extradata, descriptor->extradata_size);
2557 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2558 int coded_width = mxf_get_codec_ul(mxf_intra_only_picture_coded_width,
2559 &descriptor->essence_codec_ul)->id;
2561 st->codecpar->width = coded_width;
2562 ret = ff_generate_avci_extradata(st);
2566 if (st->codecpar->codec_type != AVMEDIA_TYPE_DATA && source_track->wrapping != FrameWrapped) {
2567 /* TODO: decode timestamps */
2568 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2572 for (int i = 0; i < mxf->fc->nb_streams; i++) {
2573 MXFTrack *track1 = mxf->fc->streams[i]->priv_data;
2574 if (track1 && track1->body_sid) {
2575 for (int j = i + 1; j < mxf->fc->nb_streams; j++) {
2576 MXFTrack *track2 = mxf->fc->streams[j]->priv_data;
2577 if (track2 && track1->body_sid == track2->body_sid && track1->wrapping != track2->wrapping) {
2578 if (track1->wrapping == UnknownWrapped)
2579 track1->wrapping = track2->wrapping;
2580 else if (track2->wrapping == UnknownWrapped)
2581 track2->wrapping = track1->wrapping;
2583 av_log(mxf->fc, AV_LOG_ERROR, "stream %d and stream %d have the same BodySID (%d) "
2584 "with different wrapping\n", i, j, track1->body_sid);
2595 static int64_t mxf_timestamp_to_int64(uint64_t timestamp)
2597 struct tm time = { 0 };
2599 time.tm_year = (timestamp >> 48) - 1900;
2600 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2601 time.tm_mday = (timestamp >> 32 & 0xFF);
2602 time.tm_hour = (timestamp >> 24 & 0xFF);
2603 time.tm_min = (timestamp >> 16 & 0xFF);
2604 time.tm_sec = (timestamp >> 8 & 0xFF);
2605 msecs = (timestamp & 0xFF) * 4;
2607 /* Clip values for legacy reasons. Maybe we should return error instead? */
2608 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2609 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2610 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2611 time.tm_min = av_clip(time.tm_min, 0, 59);
2612 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2613 msecs = av_clip(msecs, 0, 999);
2615 return (int64_t)av_timegm(&time) * 1000000 + msecs * 1000;
2618 #define SET_STR_METADATA(pb, name, str) do { \
2619 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2621 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2624 #define SET_UID_METADATA(pb, name, var, str) do { \
2625 avio_read(pb, var, 16); \
2626 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2628 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2631 #define SET_TS_METADATA(pb, name, var, str) do { \
2632 var = avio_rb64(pb); \
2633 if (var && (ret = avpriv_dict_set_timestamp(&s->metadata, name, mxf_timestamp_to_int64(var))) < 0) \
2637 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2639 MXFContext *mxf = arg;
2640 AVFormatContext *s = mxf->fc;
2647 SET_STR_METADATA(pb, "company_name", str);
2650 SET_STR_METADATA(pb, "product_name", str);
2653 SET_STR_METADATA(pb, "product_version", str);
2656 SET_UID_METADATA(pb, "product_uid", uid, str);
2659 SET_TS_METADATA(pb, "modification_date", ts, str);
2662 SET_STR_METADATA(pb, "application_platform", str);
2665 SET_UID_METADATA(pb, "generation_uid", uid, str);
2668 SET_UID_METADATA(pb, "uid", uid, str);
2674 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2676 MXFContext *mxf = arg;
2677 AVFormatContext *s = mxf->fc;
2681 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2682 SET_STR_METADATA(pb, "project_name", str);
2687 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2688 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2689 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2690 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2691 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2692 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2693 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2694 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2695 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2696 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2697 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2698 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2699 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2700 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2701 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2702 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2703 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2704 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2705 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2706 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2707 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2708 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2709 { { 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 */
2710 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2711 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2712 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2713 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2714 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2715 { { 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 */
2716 { { 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 */
2717 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2718 { { 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 */
2719 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2720 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2721 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2722 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2723 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2724 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2725 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x23,0x00 }, mxf_read_essence_container_data, sizeof(MXFEssenceContainerData), EssenceContainerData },
2726 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2729 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2733 case MultipleDescriptor:
2735 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2736 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2744 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2746 AVIOContext *pb = mxf->fc->pb;
2747 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2748 uint64_t klv_end = avio_tell(pb) + klv->length;
2751 return AVERROR(ENOMEM);
2753 mxf_metadataset_init(ctx, type);
2754 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2756 int tag = avio_rb16(pb);
2757 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2758 uint64_t next = avio_tell(pb) + size;
2761 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2762 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2763 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2766 if (tag > 0x7FFF) { /* dynamic tag */
2768 for (i = 0; i < mxf->local_tags_count; i++) {
2769 int local_tag = AV_RB16(mxf->local_tags+i*18);
2770 if (local_tag == tag) {
2771 memcpy(uid, mxf->local_tags+i*18+2, 16);
2772 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2773 PRINT_KEY(mxf->fc, "uid", uid);
2777 if (ctx_size && tag == 0x3C0A) {
2778 avio_read(pb, ctx->uid, 16);
2779 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2781 mxf_free_metadataset(&ctx, 1);
2785 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2786 * it extending past the end of the KLV though (zzuf5.mxf). */
2787 if (avio_tell(pb) > klv_end) {
2789 mxf_free_metadataset(&ctx, 1);
2792 av_log(mxf->fc, AV_LOG_ERROR,
2793 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2795 return AVERROR_INVALIDDATA;
2796 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2797 avio_seek(pb, next, SEEK_SET);
2799 return ctx_size ? mxf_add_metadata_set(mxf, &ctx) : 0;
2803 * Matches any partition pack key, in other words:
2807 * @return non-zero if the key is a partition pack key, zero otherwise
2809 static int mxf_is_partition_pack_key(UID key)
2811 //NOTE: this is a little lax since it doesn't constraint key[14]
2812 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2813 key[13] >= 2 && key[13] <= 4;
2817 * Parses a metadata KLV
2818 * @return <0 on error, 0 otherwise
2820 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2821 int ctx_size, enum MXFMetadataSetType type)
2823 AVFormatContext *s = mxf->fc;
2825 if (klv.key[5] == 0x53) {
2826 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2828 uint64_t next = avio_tell(s->pb) + klv.length;
2829 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2831 /* only seek forward, else this can loop for a long time */
2832 if (avio_tell(s->pb) > next) {
2833 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2835 return AVERROR_INVALIDDATA;
2838 avio_seek(s->pb, next, SEEK_SET);
2841 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2848 * Seeks to the previous partition and parses it, if possible
2849 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2851 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2853 AVIOContext *pb = mxf->fc->pb;
2855 int64_t current_partition_ofs;
2858 if (!mxf->current_partition ||
2859 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2860 return 0; /* we've parsed all partitions */
2862 /* seek to previous partition */
2863 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2864 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2865 mxf->current_partition = NULL;
2867 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2869 /* Make sure this is actually a PartitionPack, and if so parse it.
2872 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2873 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2877 if (!mxf_is_partition_pack_key(klv.key)) {
2878 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2879 return AVERROR_INVALIDDATA;
2882 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2883 * can point to just before the current partition, causing klv_read_packet()
2884 * to sync back up to it. See deadlock3.mxf
2886 if (klv.offset >= current_partition_ofs) {
2887 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2888 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2889 return AVERROR_INVALIDDATA;
2892 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2899 * Called when essence is encountered
2900 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2902 static int mxf_parse_handle_essence(MXFContext *mxf)
2904 AVIOContext *pb = mxf->fc->pb;
2907 if (mxf->parsing_backward) {
2908 return mxf_seek_to_previous_partition(mxf);
2910 if (!mxf->footer_partition) {
2911 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2915 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2917 /* remember where we were so we don't end up seeking further back than this */
2918 mxf->last_forward_tell = avio_tell(pb);
2920 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2921 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2925 /* seek to FooterPartition and parse backward */
2926 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2927 av_log(mxf->fc, AV_LOG_ERROR,
2928 "failed to seek to FooterPartition @ 0x%" PRIx64
2929 " (%"PRId64") - partial file?\n",
2930 mxf->run_in + mxf->footer_partition, ret);
2934 mxf->current_partition = NULL;
2935 mxf->parsing_backward = 1;
2942 * Called when the next partition or EOF is encountered
2943 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2945 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2947 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2950 static MXFWrappingScheme mxf_get_wrapping_by_body_sid(AVFormatContext *s, int body_sid)
2952 for (int i = 0; i < s->nb_streams; i++) {
2953 MXFTrack *track = s->streams[i]->priv_data;
2954 if (track && track->body_sid == body_sid && track->wrapping != UnknownWrapped)
2955 return track->wrapping;
2957 return UnknownWrapped;
2961 * Figures out the proper offset and length of the essence container in each partition
2963 static void mxf_compute_essence_containers(AVFormatContext *s)
2965 MXFContext *mxf = s->priv_data;
2968 for (x = 0; x < mxf->partitions_count; x++) {
2969 MXFPartition *p = &mxf->partitions[x];
2970 MXFWrappingScheme wrapping;
2973 continue; /* BodySID == 0 -> no essence */
2975 /* for clip wrapped essences we point essence_offset after the KL (usually klv.offset + 20 or 25)
2976 * otherwise we point essence_offset at the key of the first essence KLV.
2979 wrapping = (mxf->op == OPAtom) ? ClipWrapped : mxf_get_wrapping_by_body_sid(s, p->body_sid);
2981 if (wrapping == ClipWrapped) {
2982 p->essence_offset = p->first_essence_klv.next_klv - p->first_essence_klv.length;
2983 p->essence_length = p->first_essence_klv.length;
2985 p->essence_offset = p->first_essence_klv.offset;
2987 /* essence container spans to the next partition */
2988 if (x < mxf->partitions_count - 1)
2989 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2991 if (p->essence_length < 0) {
2992 /* next ThisPartition < essence_offset */
2993 p->essence_length = 0;
2994 av_log(mxf->fc, AV_LOG_ERROR,
2995 "partition %i: bad ThisPartition = %"PRIX64"\n",
2996 x+1, mxf->partitions[x+1].this_partition);
3002 static int is_pcm(enum AVCodecID codec_id)
3004 /* we only care about "normal" PCM codecs until we get samples */
3005 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
3008 static MXFIndexTable *mxf_find_index_table(MXFContext *mxf, int index_sid)
3011 for (i = 0; i < mxf->nb_index_tables; i++)
3012 if (mxf->index_tables[i].index_sid == index_sid)
3013 return &mxf->index_tables[i];
3018 * Deal with the case where for some audio atoms EditUnitByteCount is
3019 * very small (2, 4..). In those cases we should read more than one
3020 * sample per call to mxf_read_packet().
3022 static void mxf_compute_edit_units_per_packet(MXFContext *mxf, AVStream *st)
3024 MXFTrack *track = st->priv_data;
3029 track->edit_units_per_packet = 1;
3030 if (track->wrapping != ClipWrapped)
3033 t = mxf_find_index_table(mxf, track->index_sid);
3035 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
3036 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
3037 !is_pcm(st->codecpar->codec_id) ||
3039 t->nb_segments != 1 ||
3040 t->segments[0]->edit_unit_byte_count >= 32)
3043 /* arbitrarily default to 48 kHz PAL audio frame size */
3044 /* TODO: We could compute this from the ratio between the audio
3045 * and video edit rates for 48 kHz NTSC we could use the
3046 * 1802-1802-1802-1802-1801 pattern. */
3047 track->edit_units_per_packet = FFMAX(1, track->edit_rate.num / track->edit_rate.den / 25);
3051 * Deal with the case where ClipWrapped essences does not have any IndexTableSegments.
3053 static int mxf_handle_missing_index_segment(MXFContext *mxf, AVStream *st)
3055 MXFTrack *track = st->priv_data;
3056 MXFIndexTableSegment *segment = NULL;
3057 MXFPartition *p = NULL;
3058 int essence_partition_count = 0;
3059 int edit_unit_byte_count = 0;
3062 if (!track || track->wrapping != ClipWrapped)
3065 /* check if track already has an IndexTableSegment */
3066 for (i = 0; i < mxf->metadata_sets_count; i++) {
3067 if (mxf->metadata_sets[i]->type == IndexTableSegment) {
3068 MXFIndexTableSegment *s = (MXFIndexTableSegment*)mxf->metadata_sets[i];
3069 if (s->body_sid == track->body_sid)
3074 /* find the essence partition */
3075 for (i = 0; i < mxf->partitions_count; i++) {
3076 /* BodySID == 0 -> no essence */
3077 if (mxf->partitions[i].body_sid != track->body_sid)
3080 p = &mxf->partitions[i];
3081 essence_partition_count++;
3084 /* only handle files with a single essence partition */
3085 if (essence_partition_count != 1)
3088 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && is_pcm(st->codecpar->codec_id)) {
3089 edit_unit_byte_count = (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->channels) >> 3;
3090 } else if (st->duration > 0 && p->first_essence_klv.length > 0 && p->first_essence_klv.length % st->duration == 0) {
3091 edit_unit_byte_count = p->first_essence_klv.length / st->duration;
3094 if (edit_unit_byte_count <= 0)
3097 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);
3099 if (!(segment = av_mallocz(sizeof(*segment))))
3100 return AVERROR(ENOMEM);
3102 if ((ret = mxf_add_metadata_set(mxf, (MXFMetadataSet**)&segment)))
3105 /* Make sure we have nonzero unique index_sid, body_sid will be ok, because
3106 * using the same SID for index is forbidden in MXF. */
3107 if (!track->index_sid)
3108 track->index_sid = track->body_sid;
3110 segment->type = IndexTableSegment;
3111 /* stream will be treated as small EditUnitByteCount */
3112 segment->edit_unit_byte_count = edit_unit_byte_count;
3113 segment->index_start_position = 0;
3114 segment->index_duration = st->duration;
3115 segment->index_edit_rate = av_inv_q(st->time_base);
3116 segment->index_sid = track->index_sid;
3117 segment->body_sid = p->body_sid;
3121 static void mxf_read_random_index_pack(AVFormatContext *s)
3123 MXFContext *mxf = s->priv_data;
3125 int64_t file_size, max_rip_length, min_rip_length;
3128 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
3131 file_size = avio_size(s->pb);
3133 /* S377m says to check the RIP length for "silly" values, without defining "silly".
3134 * The limit below assumes a file with nothing but partition packs and a RIP.
3135 * Before changing this, consider that a muxer may place each sample in its own partition.
3137 * 105 is the size of the smallest possible PartitionPack
3138 * 12 is the size of each RIP entry
3139 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
3141 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
3142 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
3144 /* We're only interested in RIPs with at least two entries.. */
3145 min_rip_length = 16+1+24+4;
3147 /* See S377m section 11 */
3148 avio_seek(s->pb, file_size - 4, SEEK_SET);
3149 length = avio_rb32(s->pb);
3151 if (length < min_rip_length || length > max_rip_length)
3153 avio_seek(s->pb, file_size - length, SEEK_SET);
3154 if (klv_read_packet(&klv, s->pb) < 0 ||
3155 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key))
3157 if (klv.next_klv != file_size || klv.length <= 4 || (klv.length - 4) % 12) {
3158 av_log(s, AV_LOG_WARNING, "Invalid RIP KLV length\n");
3162 avio_skip(s->pb, klv.length - 12);
3163 mxf->footer_partition = avio_rb64(s->pb);
3166 if (mxf->run_in + mxf->footer_partition >= file_size) {
3167 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
3168 mxf->footer_partition = 0;
3172 avio_seek(s->pb, mxf->run_in, SEEK_SET);
3175 static int mxf_read_header(AVFormatContext *s)
3177 MXFContext *mxf = s->priv_data;
3179 int64_t essence_offset = 0;
3182 mxf->last_forward_tell = INT64_MAX;
3184 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
3185 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
3186 //goto fail should not be needed as no metadata sets will have been parsed yet
3187 return AVERROR_INVALIDDATA;
3189 avio_seek(s->pb, -14, SEEK_CUR);
3191 mxf->run_in = avio_tell(s->pb);
3193 mxf_read_random_index_pack(s);
3195 while (!avio_feof(s->pb)) {
3196 const MXFMetadataReadTableEntry *metadata;
3198 if (klv_read_packet(&klv, s->pb) < 0) {
3199 /* EOF - seek to previous partition or stop */
3200 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3206 PRINT_KEY(s, "read header", klv.key);
3207 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3208 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
3209 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3210 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3211 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
3212 IS_KLV_KEY(klv.key, mxf_system_item_key_cp) ||
3213 IS_KLV_KEY(klv.key, mxf_system_item_key_gc)) {
3215 if (!mxf->current_partition) {
3216 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
3217 ret = AVERROR_INVALIDDATA;
3221 if (!mxf->current_partition->first_essence_klv.offset)
3222 mxf->current_partition->first_essence_klv = klv;
3224 if (!essence_offset)
3225 essence_offset = klv.offset;
3227 /* seek to footer, previous partition or stop */
3228 if (mxf_parse_handle_essence(mxf) <= 0)
3231 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
3232 /* next partition pack - keep going, seek to previous partition or stop */
3233 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
3235 else if (mxf->parsing_backward)
3237 /* we're still parsing forward. proceed to parsing this partition pack */
3240 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
3241 if (IS_KLV_KEY(klv.key, metadata->key)) {
3242 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
3247 if (!metadata->read) {
3248 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
3250 avio_skip(s->pb, klv.length);
3253 /* FIXME avoid seek */
3254 if (!essence_offset) {
3255 av_log(s, AV_LOG_ERROR, "no essence\n");
3256 ret = AVERROR_INVALIDDATA;
3259 avio_seek(s->pb, essence_offset, SEEK_SET);
3261 /* we need to do this before computing the index tables
3262 * to be able to fill in zero IndexDurations with st->duration */
3263 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
3266 for (int i = 0; i < s->nb_streams; i++)
3267 mxf_handle_missing_index_segment(mxf, s->streams[i]);
3269 if ((ret = mxf_compute_index_tables(mxf)) < 0)
3272 if (mxf->nb_index_tables > 1) {
3273 /* TODO: look up which IndexSID to use via EssenceContainerData */
3274 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
3275 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
3276 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom && (s->error_recognition & AV_EF_EXPLODE)) {
3277 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
3278 ret = AVERROR_INVALIDDATA;
3282 mxf_compute_essence_containers(s);
3284 for (int i = 0; i < s->nb_streams; i++)
3285 mxf_compute_edit_units_per_packet(mxf, s->streams[i]);
3294 /* Get the edit unit of the next packet from current_offset in a track. The returned edit unit can be original_duration as well! */
3295 static int mxf_get_next_track_edit_unit(MXFContext *mxf, MXFTrack *track, int64_t current_offset, int64_t *edit_unit_out)
3297 int64_t a, b, m, offset;
3298 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3300 if (!t || track->original_duration <= 0)
3304 b = track->original_duration;
3308 if (mxf_edit_unit_absolute_offset(mxf, t, m, track->edit_rate, NULL, &offset, NULL, 0) < 0)
3310 if (offset < current_offset)
3321 static int64_t mxf_compute_sample_count(MXFContext *mxf, AVStream *st,
3324 MXFTrack *track = st->priv_data;
3325 AVRational time_base = av_inv_q(track->edit_rate);
3326 AVRational sample_rate = av_inv_q(st->time_base);
3328 // For non-audio sample_count equals current edit unit
3329 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
3332 if ((sample_rate.num / sample_rate.den) == 48000) {
3333 return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
3335 int remainder = (sample_rate.num * time_base.num) %
3336 (time_base.den * sample_rate.den);
3338 av_log(mxf->fc, AV_LOG_WARNING,
3339 "seeking detected on stream #%d with time base (%d/%d) and "
3340 "sample rate (%d/%d), audio pts won't be accurate.\n",
3341 st->index, time_base.num, time_base.den,
3342 sample_rate.num, sample_rate.den);
3343 return av_rescale_q(edit_unit, sample_rate, track->edit_rate);
3348 * Make sure track->sample_count is correct based on what offset we're currently at.
3349 * Also determine the next edit unit (or packet) offset.
3350 * @return next_ofs if OK, <0 on error
3352 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, AVStream *st, int64_t current_offset, int resync)
3354 int64_t next_ofs = -1;
3355 MXFTrack *track = st->priv_data;
3356 int64_t edit_unit = av_rescale_q(track->sample_count, st->time_base, av_inv_q(track->edit_rate));
3357 int64_t new_edit_unit;
3358 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3360 if (!t || track->wrapping == UnknownWrapped)
3363 if (mxf_edit_unit_absolute_offset(mxf, t, edit_unit + track->edit_units_per_packet, track->edit_rate, NULL, &next_ofs, NULL, 0) < 0 &&
3364 (next_ofs = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3365 av_log(mxf->fc, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3369 /* check if the next edit unit offset (next_ofs) starts ahead of current_offset */
3370 if (next_ofs > current_offset)
3374 av_log(mxf->fc, AV_LOG_ERROR, "cannot find current edit unit for stream %d, invalid index?\n", st->index);
3378 if (mxf_get_next_track_edit_unit(mxf, track, current_offset + 1, &new_edit_unit) < 0 || new_edit_unit <= 0) {
3379 av_log(mxf->fc, AV_LOG_ERROR, "failed to find next track edit unit in stream %d\n", st->index);
3384 track->sample_count = mxf_compute_sample_count(mxf, st, new_edit_unit);
3385 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);
3387 return mxf_set_current_edit_unit(mxf, st, current_offset, 0);
3390 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecParameters *par,
3393 AVStream *st = mxf->fc->streams[pkt->stream_index];
3394 MXFTrack *track = st->priv_data;
3395 int64_t bits_per_sample = par->bits_per_coded_sample;
3397 if (!bits_per_sample)
3398 bits_per_sample = av_get_bits_per_sample(par->codec_id);
3400 pkt->pts = track->sample_count;
3402 if ( par->channels <= 0
3403 || bits_per_sample <= 0
3404 || par->channels * (int64_t)bits_per_sample < 8)
3405 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);
3407 track->sample_count += pkt->size / (par->channels * (int64_t)bits_per_sample / 8);
3412 static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt)
3414 AVCodecParameters *par = st->codecpar;
3415 MXFTrack *track = st->priv_data;
3417 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
3418 /* see if we have an index table to derive timestamps from */
3419 MXFIndexTable *t = mxf_find_index_table(mxf, track->index_sid);
3421 if (t && track->sample_count < t->nb_ptses) {
3422 pkt->dts = track->sample_count + t->first_dts;
3423 pkt->pts = t->ptses[track->sample_count];
3424 } else if (track->intra_only) {
3425 /* intra-only -> PTS = EditUnit.
3426 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3427 pkt->pts = track->sample_count;
3429 track->sample_count++;
3430 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
3431 int ret = mxf_set_audio_pts(mxf, par, pkt);
3435 pkt->dts = pkt->pts = track->sample_count;
3437 track->sample_count++;
3442 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3445 MXFContext *mxf = s->priv_data;
3449 int64_t max_data_size;
3450 int64_t pos = avio_tell(s->pb);
3452 if (pos < mxf->current_klv_data.next_klv - mxf->current_klv_data.length || pos >= mxf->current_klv_data.next_klv) {
3453 mxf->current_klv_data = (KLVPacket){{0}};
3454 ret = klv_read_packet(&klv, s->pb);
3457 max_data_size = klv.length;
3458 pos = klv.next_klv - klv.length;
3459 PRINT_KEY(s, "read packet", klv.key);
3460 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3461 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
3462 ret = mxf_decrypt_triplet(s, pkt, &klv);
3464 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
3470 klv = mxf->current_klv_data;
3471 max_data_size = klv.next_klv - pos;
3473 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3474 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3475 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
3476 int body_sid = find_body_sid_by_absolute_offset(mxf, klv.offset);
3477 int index = mxf_get_stream_index(s, &klv, body_sid);
3483 av_log(s, AV_LOG_ERROR,
3484 "error getting stream index %"PRIu32"\n",
3485 AV_RB32(klv.key + 12));
3489 st = s->streams[index];
3490 track = st->priv_data;
3492 if (s->streams[index]->discard == AVDISCARD_ALL)
3495 next_ofs = mxf_set_current_edit_unit(mxf, st, pos, 1);
3497 if (track->wrapping != FrameWrapped) {
3500 if (next_ofs <= 0) {
3501 // If we have no way to packetize the data, then return it in chunks...
3502 if (klv.next_klv - klv.length == pos && max_data_size > MXF_MAX_CHUNK_SIZE) {
3503 st->need_parsing = AVSTREAM_PARSE_FULL;
3504 avpriv_request_sample(s, "Huge KLV without proper index in non-frame wrapped essence");
3506 size = FFMIN(max_data_size, MXF_MAX_CHUNK_SIZE);
3508 if ((size = next_ofs - pos) <= 0) {
3509 av_log(s, AV_LOG_ERROR, "bad size: %"PRId64"\n", size);
3510 mxf->current_klv_data = (KLVPacket){{0}};
3511 return AVERROR_INVALIDDATA;
3513 // We must not overread, because the next edit unit might be in another KLV
3514 if (size > max_data_size)
3515 size = max_data_size;
3518 mxf->current_klv_data = klv;
3521 klv.next_klv = klv.offset + klv.length;
3524 /* check for 8 channels AES3 element */
3525 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
3526 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
3529 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
3530 mxf->current_klv_data = (KLVPacket){{0}};
3533 } else if (mxf->eia608_extract &&
3534 s->streams[index]->codecpar->codec_id == AV_CODEC_ID_EIA_608) {
3535 ret = mxf_get_eia608_packet(s, s->streams[index], pkt, klv.length);
3537 mxf->current_klv_data = (KLVPacket){{0}};
3541 ret = av_get_packet(s->pb, pkt, klv.length);
3543 mxf->current_klv_data = (KLVPacket){{0}};
3547 pkt->stream_index = index;
3548 pkt->pos = klv.offset;
3550 ret = mxf_set_pts(mxf, st, pkt);
3552 mxf->current_klv_data = (KLVPacket){{0}};
3556 /* seek for truncated packets */
3557 avio_seek(s->pb, klv.next_klv, SEEK_SET);
3562 avio_skip(s->pb, max_data_size);
3563 mxf->current_klv_data = (KLVPacket){{0}};
3566 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3569 static int mxf_read_close(AVFormatContext *s)
3571 MXFContext *mxf = s->priv_data;
3574 av_freep(&mxf->packages_refs);
3575 av_freep(&mxf->essence_container_data_refs);
3577 for (i = 0; i < s->nb_streams; i++)
3578 s->streams[i]->priv_data = NULL;
3580 for (i = 0; i < mxf->metadata_sets_count; i++) {
3581 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3583 mxf->metadata_sets_count = 0;
3584 av_freep(&mxf->partitions);
3585 av_freep(&mxf->metadata_sets);
3586 av_freep(&mxf->aesc);
3587 av_freep(&mxf->local_tags);
3589 if (mxf->index_tables) {
3590 for (i = 0; i < mxf->nb_index_tables; i++) {
3591 av_freep(&mxf->index_tables[i].segments);
3592 av_freep(&mxf->index_tables[i].ptses);
3593 av_freep(&mxf->index_tables[i].fake_index);
3594 av_freep(&mxf->index_tables[i].offsets);
3597 av_freep(&mxf->index_tables);
3602 static int mxf_probe(const AVProbeData *p) {
3603 const uint8_t *bufp = p->buf;
3604 const uint8_t *end = p->buf + p->buf_size;
3606 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3609 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3610 end -= sizeof(mxf_header_partition_pack_key);
3612 for (; bufp < end;) {
3613 if (!((bufp[13] - 1) & 0xF2)){
3614 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3615 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3616 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3617 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3618 return AVPROBE_SCORE_MAX;
3627 /* rudimentary byte seek */
3628 /* XXX: use MXF Index */
3629 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3631 AVStream *st = s->streams[stream_index];
3633 MXFContext* mxf = s->priv_data;
3637 MXFTrack *source_track = st->priv_data;
3642 /* if audio then truncate sample_time to EditRate */
3643 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
3644 sample_time = av_rescale_q(sample_time, st->time_base,
3645 av_inv_q(source_track->edit_rate));
3647 if (mxf->nb_index_tables <= 0) {
3649 return AVERROR_INVALIDDATA;
3650 if (sample_time < 0)
3652 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3654 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3658 ff_update_cur_dts(s, st, sample_time);
3659 mxf->current_klv_data = (KLVPacket){{0}};
3661 MXFPartition *partition;
3663 t = &mxf->index_tables[0];
3664 if (t->index_sid != source_track->index_sid) {
3665 /* If the first index table does not belong to the stream, then find a stream which does belong to the index table */
3666 for (i = 0; i < s->nb_streams; i++) {
3667 MXFTrack *new_source_track = s->streams[i]->priv_data;
3668 if (new_source_track && new_source_track->index_sid == t->index_sid) {
3669 sample_time = av_rescale_q(sample_time, new_source_track->edit_rate, source_track->edit_rate);
3670 source_track = new_source_track;
3675 if (i == s->nb_streams)
3676 return AVERROR_INVALIDDATA;
3679 /* clamp above zero, else ff_index_search_timestamp() returns negative
3680 * this also means we allow seeking before the start */
3681 sample_time = FFMAX(sample_time, 0);
3683 if (t->fake_index) {
3684 /* The first frames may not be keyframes in presentation order, so
3685 * we have to advance the target to be able to find the first
3686 * keyframe backwards... */
3687 if (!(flags & AVSEEK_FLAG_ANY) &&
3688 (flags & AVSEEK_FLAG_BACKWARD) &&
3689 t->ptses[0] != AV_NOPTS_VALUE &&
3690 sample_time < t->ptses[0] &&
3691 (t->fake_index[t->ptses[0]].flags & AVINDEX_KEYFRAME))
3692 sample_time = t->ptses[0];
3694 /* behave as if we have a proper index */
3695 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3697 /* get the stored order index from the display order index */
3698 sample_time += t->offsets[sample_time];
3700 /* no IndexEntryArray (one or more CBR segments)
3701 * make sure we don't seek past the end */
3702 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3705 if (source_track->wrapping == UnknownWrapped)
3706 av_log(mxf->fc, AV_LOG_WARNING, "attempted seek in an UnknownWrapped essence\n");
3708 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, source_track->edit_rate, &sample_time, &seekpos, &partition, 1)) < 0)
3711 ff_update_cur_dts(s, st, sample_time);
3712 if (source_track->wrapping == ClipWrapped) {
3713 KLVPacket klv = partition->first_essence_klv;
3714 if (seekpos < klv.next_klv - klv.length || seekpos >= klv.next_klv) {
3715 av_log(mxf->fc, AV_LOG_ERROR, "attempted seek out of clip wrapped KLV\n");
3716 return AVERROR_INVALIDDATA;
3718 mxf->current_klv_data = klv;
3720 mxf->current_klv_data = (KLVPacket){{0}};
3722 avio_seek(s->pb, seekpos, SEEK_SET);
3725 // Update all tracks sample count
3726 for (i = 0; i < s->nb_streams; i++) {
3727 AVStream *cur_st = s->streams[i];
3728 MXFTrack *cur_track = cur_st->priv_data;
3730 int64_t track_edit_unit = sample_time;
3732 mxf_get_next_track_edit_unit(mxf, cur_track, seekpos, &track_edit_unit);
3733 cur_track->sample_count = mxf_compute_sample_count(mxf, cur_st, track_edit_unit);
3739 static const AVOption options[] = {
3740 { "eia608_extract", "extract eia 608 captions from s436m track",
3741 offsetof(MXFContext, eia608_extract), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1,
3742 AV_OPT_FLAG_DECODING_PARAM },
3746 static const AVClass demuxer_class = {
3747 .class_name = "mxf",
3748 .item_name = av_default_item_name,
3750 .version = LIBAVUTIL_VERSION_INT,
3751 .category = AV_CLASS_CATEGORY_DEMUXER,
3754 AVInputFormat ff_mxf_demuxer = {
3756 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3757 .flags = AVFMT_SEEK_TO_PTS,
3758 .priv_data_size = sizeof(MXFContext),
3759 .read_probe = mxf_probe,
3760 .read_header = mxf_read_header,
3761 .read_packet = mxf_read_packet,
3762 .read_close = mxf_read_close,
3763 .read_seek = mxf_read_seek,
3764 .priv_class = &demuxer_class,