3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/timecode.h"
75 OPSONYOpt, /* FATE sample, violates the spec in places */
78 typedef struct MXFPartition {
81 MXFPartitionType type;
82 uint64_t previous_partition;
85 int64_t this_partition;
86 int64_t essence_offset; ///< absolute offset of essence
87 int64_t essence_length;
89 int64_t header_byte_count;
90 int64_t index_byte_count;
92 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
95 typedef struct MXFCryptoContext {
97 enum MXFMetadataSetType type;
98 UID source_container_ul;
101 typedef struct MXFStructuralComponent {
103 enum MXFMetadataSetType type;
104 UID source_package_uid;
105 UID data_definition_ul;
107 int64_t start_position;
109 } MXFStructuralComponent;
111 typedef struct MXFSequence {
113 enum MXFMetadataSetType type;
114 UID data_definition_ul;
115 UID *structural_components_refs;
116 int structural_components_count;
121 typedef struct MXFTrack {
123 enum MXFMetadataSetType type;
126 struct AVRational rate;
128 } MXFTimecodeComponent;
132 enum MXFMetadataSetType type;
133 UID input_segment_ref;
134 } MXFPulldownComponent;
138 enum MXFMetadataSetType type;
139 UID *structural_components_refs;
140 int structural_components_count;
146 enum MXFMetadataSetType type;
153 enum MXFMetadataSetType type;
154 MXFSequence *sequence; /* mandatory, and only one */
157 uint8_t track_number[4];
158 AVRational edit_rate;
160 uint64_t sample_count;
161 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
164 typedef struct MXFDescriptor {
166 enum MXFMetadataSetType type;
167 UID essence_container_ul;
168 UID essence_codec_ul;
170 AVRational sample_rate;
171 AVRational aspect_ratio;
173 int height; /* Field height, not frame height */
174 int frame_layout; /* See MXFFrameLayout enum */
180 int64_t duration; /* ContainerDuration optional property */
181 unsigned int component_depth;
182 unsigned int horiz_subsampling;
183 unsigned int vert_subsampling;
184 UID *sub_descriptors_refs;
185 int sub_descriptors_count;
189 enum AVPixelFormat pix_fmt;
192 typedef struct MXFIndexTableSegment {
194 enum MXFMetadataSetType type;
195 int edit_unit_byte_count;
198 AVRational index_edit_rate;
199 uint64_t index_start_position;
200 uint64_t index_duration;
201 int8_t *temporal_offset_entries;
203 uint64_t *stream_offset_entries;
204 int nb_index_entries;
205 } MXFIndexTableSegment;
207 typedef struct MXFPackage {
209 enum MXFMetadataSetType type;
214 MXFDescriptor *descriptor; /* only one */
221 typedef struct MXFMetadataSet {
223 enum MXFMetadataSetType type;
226 /* decoded index table */
227 typedef struct MXFIndexTable {
230 int nb_ptses; /* number of PTSes or total duration of index */
231 int64_t first_dts; /* DTS = EditUnit + first_dts */
232 int64_t *ptses; /* maps EditUnit -> PTS */
234 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
235 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
236 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
239 typedef struct MXFContext {
240 MXFPartition *partitions;
241 unsigned partitions_count;
245 MXFMetadataSet **metadata_sets;
246 int metadata_sets_count;
250 int local_tags_count;
251 uint64_t footer_partition;
252 KLVPacket current_klv_data;
253 int current_klv_index;
255 MXFPartition *current_partition;
256 int parsing_backward;
257 int64_t last_forward_tell;
258 int last_forward_partition;
259 int current_edit_unit;
261 MXFIndexTable *index_tables;
262 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
265 enum MXFWrappingScheme {
270 /* NOTE: klv_offset is not set (-1) for local keys */
271 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
273 typedef struct MXFMetadataReadTableEntry {
275 MXFMetadataReadFunc *read;
277 enum MXFMetadataSetType type;
278 } MXFMetadataReadTableEntry;
280 static int mxf_read_close(AVFormatContext *s);
282 /* partial keys to match */
283 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
284 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
285 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
286 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
287 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
288 /* complete keys to match */
289 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
290 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
291 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
292 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
293 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
294 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
295 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
296 static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
297 static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
299 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
301 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
303 MXFIndexTableSegment *seg;
304 switch ((*ctx)->type) {
306 av_freep(&((MXFDescriptor *)*ctx)->extradata);
308 case MultipleDescriptor:
309 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
312 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
315 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
318 case MaterialPackage:
319 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
320 av_freep(&((MXFPackage *)*ctx)->name);
321 av_freep(&((MXFPackage *)*ctx)->comment_refs);
324 av_freep(&((MXFTaggedValue *)*ctx)->name);
325 av_freep(&((MXFTaggedValue *)*ctx)->value);
327 case IndexTableSegment:
328 seg = (MXFIndexTableSegment *)*ctx;
329 av_freep(&seg->temporal_offset_entries);
330 av_freep(&seg->flag_entries);
331 av_freep(&seg->stream_offset_entries);
339 static int64_t klv_decode_ber_length(AVIOContext *pb)
341 uint64_t size = avio_r8(pb);
342 if (size & 0x80) { /* long form */
343 int bytes_num = size & 0x7f;
344 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
346 return AVERROR_INVALIDDATA;
349 size = size << 8 | avio_r8(pb);
354 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
357 for (i = 0; i < size && !avio_feof(pb); i++) {
361 else if (b != key[i])
367 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
369 if (!mxf_read_sync(pb, mxf_klv_key, 4))
370 return AVERROR_INVALIDDATA;
371 klv->offset = avio_tell(pb) - 4;
372 memcpy(klv->key, mxf_klv_key, 4);
373 avio_read(pb, klv->key + 4, 12);
374 klv->length = klv_decode_ber_length(pb);
375 return klv->length == -1 ? -1 : 0;
378 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
382 for (i = 0; i < s->nb_streams; i++) {
383 MXFTrack *track = s->streams[i]->priv_data;
385 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
388 /* return 0 if only one stream, for OP Atom files with 0 as track number */
389 return s->nb_streams == 1 ? 0 : -1;
392 /* XXX: use AVBitStreamFilter */
393 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
395 const uint8_t *buf_ptr, *end_ptr;
399 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
400 return AVERROR_INVALIDDATA;
401 length = av_get_packet(pb, pkt, length);
404 data_ptr = pkt->data;
405 end_ptr = pkt->data + length;
406 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
407 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
408 for (i = 0; i < st->codec->channels; i++) {
409 uint32_t sample = bytestream_get_le32(&buf_ptr);
410 if (st->codec->bits_per_coded_sample == 24)
411 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
413 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
415 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
417 av_shrink_packet(pkt, data_ptr - pkt->data);
421 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
423 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
424 MXFContext *mxf = s->priv_data;
425 AVIOContext *pb = s->pb;
426 int64_t end = avio_tell(pb) + klv->length;
429 uint64_t plaintext_size;
434 if (!mxf->aesc && s->key && s->keylen == 16) {
435 mxf->aesc = av_aes_alloc();
437 return AVERROR(ENOMEM);
438 av_aes_init(mxf->aesc, s->key, 128, 1);
441 avio_skip(pb, klv_decode_ber_length(pb));
443 klv_decode_ber_length(pb);
444 plaintext_size = avio_rb64(pb);
446 klv_decode_ber_length(pb);
447 avio_read(pb, klv->key, 16);
448 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
449 return AVERROR_INVALIDDATA;
450 index = mxf_get_stream_index(s, klv);
452 return AVERROR_INVALIDDATA;
454 klv_decode_ber_length(pb);
455 orig_size = avio_rb64(pb);
456 if (orig_size < plaintext_size)
457 return AVERROR_INVALIDDATA;
459 size = klv_decode_ber_length(pb);
460 if (size < 32 || size - 32 < orig_size)
461 return AVERROR_INVALIDDATA;
462 avio_read(pb, ivec, 16);
463 avio_read(pb, tmpbuf, 16);
465 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
466 if (memcmp(tmpbuf, checkv, 16))
467 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
469 size = av_get_packet(pb, pkt, size);
472 else if (size < plaintext_size)
473 return AVERROR_INVALIDDATA;
474 size -= plaintext_size;
476 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
477 &pkt->data[plaintext_size], size >> 4, ivec, 1);
478 av_shrink_packet(pkt, orig_size);
479 pkt->stream_index = index;
480 avio_skip(pb, end - avio_tell(pb));
484 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
486 MXFContext *mxf = arg;
487 int item_num = avio_rb32(pb);
488 int item_len = avio_rb32(pb);
490 if (item_len != 18) {
491 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
492 return AVERROR_PATCHWELCOME;
494 if (item_num > 65536) {
495 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
496 return AVERROR_INVALIDDATA;
499 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
500 av_free(mxf->local_tags);
501 mxf->local_tags_count = 0;
502 mxf->local_tags = av_calloc(item_num, item_len);
503 if (!mxf->local_tags)
504 return AVERROR(ENOMEM);
505 mxf->local_tags_count = item_num;
506 avio_read(pb, mxf->local_tags, item_num*item_len);
510 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
512 MXFContext *mxf = arg;
513 MXFPartition *partition, *tmp_part;
515 uint64_t footer_partition;
516 uint32_t nb_essence_containers;
518 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
520 return AVERROR(ENOMEM);
521 mxf->partitions = tmp_part;
523 if (mxf->parsing_backward) {
524 /* insert the new partition pack in the middle
525 * this makes the entries in mxf->partitions sorted by offset */
526 memmove(&mxf->partitions[mxf->last_forward_partition+1],
527 &mxf->partitions[mxf->last_forward_partition],
528 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
529 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
531 mxf->last_forward_partition++;
532 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
535 memset(partition, 0, sizeof(*partition));
536 mxf->partitions_count++;
537 partition->pack_length = avio_tell(pb) - klv_offset + size;
538 partition->pack_ofs = klv_offset;
542 partition->type = Header;
545 partition->type = BodyPartition;
548 partition->type = Footer;
551 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
552 return AVERROR_INVALIDDATA;
555 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
556 partition->closed = partition->type == Footer || !(uid[14] & 1);
557 partition->complete = uid[14] > 2;
559 partition->kag_size = avio_rb32(pb);
560 partition->this_partition = avio_rb64(pb);
561 partition->previous_partition = avio_rb64(pb);
562 footer_partition = avio_rb64(pb);
563 partition->header_byte_count = avio_rb64(pb);
564 partition->index_byte_count = avio_rb64(pb);
565 partition->index_sid = avio_rb32(pb);
567 partition->body_sid = avio_rb32(pb);
568 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
569 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
570 return AVERROR_INVALIDDATA;
572 nb_essence_containers = avio_rb32(pb);
574 if (partition->this_partition &&
575 partition->previous_partition == partition->this_partition) {
576 av_log(mxf->fc, AV_LOG_ERROR,
577 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
578 partition->previous_partition);
579 /* override with the actual previous partition offset */
580 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
582 mxf->partitions + mxf->last_forward_partition - 2;
583 partition->previous_partition = prev->this_partition;
585 /* if no previous body partition are found point to the header
587 if (partition->previous_partition == partition->this_partition)
588 partition->previous_partition = 0;
589 av_log(mxf->fc, AV_LOG_ERROR,
590 "Overriding PreviousPartition with %"PRIx64"\n",
591 partition->previous_partition);
594 /* some files don'thave FooterPartition set in every partition */
595 if (footer_partition) {
596 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
597 av_log(mxf->fc, AV_LOG_ERROR,
598 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
599 mxf->footer_partition, footer_partition);
601 mxf->footer_partition = footer_partition;
605 av_log(mxf->fc, AV_LOG_TRACE,
606 "PartitionPack: ThisPartition = 0x%"PRIX64
607 ", PreviousPartition = 0x%"PRIX64", "
608 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
609 partition->this_partition,
610 partition->previous_partition, footer_partition,
611 partition->index_sid, partition->body_sid);
613 /* sanity check PreviousPartition if set */
614 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
615 if (partition->previous_partition &&
616 mxf->run_in + partition->previous_partition >= klv_offset) {
617 av_log(mxf->fc, AV_LOG_ERROR,
618 "PreviousPartition points to this partition or forward\n");
619 return AVERROR_INVALIDDATA;
622 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
623 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
624 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
625 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
626 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
627 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
628 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
629 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
630 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
631 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
632 else if (op[12] == 0x10) {
633 /* SMPTE 390m: "There shall be exactly one essence container"
634 * The following block deals with files that violate this, namely:
635 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
636 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
637 if (nb_essence_containers != 1) {
638 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
642 av_log(mxf->fc, AV_LOG_WARNING,
643 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
644 nb_essence_containers,
645 op == OP1a ? "OP1a" : "OPAtom");
651 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
655 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
656 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
657 partition->kag_size);
659 if (mxf->op == OPSONYOpt)
660 partition->kag_size = 512;
662 partition->kag_size = 1;
664 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
670 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
672 MXFMetadataSet **tmp;
674 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
676 return AVERROR(ENOMEM);
677 mxf->metadata_sets = tmp;
678 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
679 mxf->metadata_sets_count++;
683 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
685 MXFCryptoContext *cryptocontext = arg;
687 return AVERROR_INVALIDDATA;
688 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
689 avio_read(pb, cryptocontext->source_container_ul, 16);
693 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
695 *count = avio_rb32(pb);
696 *refs = av_calloc(*count, sizeof(UID));
699 return AVERROR(ENOMEM);
701 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
702 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
706 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
708 MXFContext *mxf = arg;
711 if (mxf->packages_refs)
712 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
713 av_free(mxf->packages_refs);
714 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
719 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
721 MXFStructuralComponent *source_clip = arg;
724 source_clip->duration = avio_rb64(pb);
727 source_clip->start_position = avio_rb64(pb);
730 /* UMID, only get last 16 bytes */
732 avio_read(pb, source_clip->source_package_uid, 16);
735 source_clip->source_track_id = avio_rb32(pb);
741 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
743 MXFTimecodeComponent *mxf_timecode = arg;
746 mxf_timecode->start_frame = avio_rb64(pb);
749 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
752 mxf_timecode->drop_frame = avio_r8(pb);
758 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
760 MXFPulldownComponent *mxf_pulldown = arg;
763 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
769 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
771 MXFTrack *track = arg;
774 track->track_id = avio_rb32(pb);
777 avio_read(pb, track->track_number, 4);
780 track->edit_rate.num = avio_rb32(pb);
781 track->edit_rate.den = avio_rb32(pb);
784 avio_read(pb, track->sequence_ref, 16);
790 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
792 MXFSequence *sequence = arg;
795 sequence->duration = avio_rb64(pb);
798 avio_read(pb, sequence->data_definition_ul, 16);
801 sequence->origin = avio_r8(pb);
804 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
805 &sequence->structural_components_count);
810 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
812 MXFEssenceGroup *essence_group = arg;
815 essence_group->duration = avio_rb64(pb);
818 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
819 &essence_group->structural_components_count);
824 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
830 return AVERROR(EINVAL);
832 buf_size = size + size / 2 + 1;
833 *str = av_malloc(buf_size);
835 return AVERROR(ENOMEM);
838 ret = avio_get_str16be(pb, size, *str, buf_size);
840 ret = avio_get_str16le(pb, size, *str, buf_size);
850 #define READ_STR16(type, big_endian) \
851 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
853 return mxf_read_utf16_string(pb, size, str, big_endian); \
859 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
861 MXFPackage *package = arg;
864 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
865 &package->tracks_count);
868 avio_read(pb, package->package_ul, 16);
869 avio_read(pb, package->package_uid, 16);
872 avio_read(pb, package->descriptor_ref, 16);
875 return mxf_read_utf16be_string(pb, size, &package->name);
877 return mxf_read_strong_ref_array(pb, &package->comment_refs,
878 &package->comment_count);
883 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
887 segment->nb_index_entries = avio_rb32(pb);
889 length = avio_rb32(pb);
891 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
892 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
893 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
894 av_freep(&segment->temporal_offset_entries);
895 av_freep(&segment->flag_entries);
896 return AVERROR(ENOMEM);
899 for (i = 0; i < segment->nb_index_entries; i++) {
900 segment->temporal_offset_entries[i] = avio_r8(pb);
901 avio_r8(pb); /* KeyFrameOffset */
902 segment->flag_entries[i] = avio_r8(pb);
903 segment->stream_offset_entries[i] = avio_rb64(pb);
904 avio_skip(pb, length - 11);
909 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
911 MXFIndexTableSegment *segment = arg;
914 segment->edit_unit_byte_count = avio_rb32(pb);
915 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
918 segment->index_sid = avio_rb32(pb);
919 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
922 segment->body_sid = avio_rb32(pb);
923 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
926 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
927 return mxf_read_index_entry_array(pb, segment);
929 segment->index_edit_rate.num = avio_rb32(pb);
930 segment->index_edit_rate.den = avio_rb32(pb);
931 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
932 segment->index_edit_rate.den);
935 segment->index_start_position = avio_rb64(pb);
936 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
939 segment->index_duration = avio_rb64(pb);
940 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
946 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
948 int code, value, ofs = 0;
949 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
954 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
957 layout[ofs++] = code;
958 layout[ofs++] = value;
960 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
961 } while (code != 0); /* SMPTE 377M E.2.46 */
963 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
966 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
968 MXFDescriptor *descriptor = arg;
971 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
972 &descriptor->sub_descriptors_count);
973 case 0x3002: /* ContainerDuration */
974 descriptor->duration = avio_rb64(pb);
977 avio_read(pb, descriptor->essence_container_ul, 16);
980 avio_read(pb, descriptor->codec_ul, 16);
983 descriptor->linked_track_id = avio_rb32(pb);
985 case 0x3201: /* PictureEssenceCoding */
986 avio_read(pb, descriptor->essence_codec_ul, 16);
989 descriptor->width = avio_rb32(pb);
992 descriptor->height = avio_rb32(pb);
995 descriptor->frame_layout = avio_r8(pb);
998 descriptor->aspect_ratio.num = avio_rb32(pb);
999 descriptor->aspect_ratio.den = avio_rb32(pb);
1002 descriptor->field_dominance = avio_r8(pb);
1005 descriptor->component_depth = avio_rb32(pb);
1008 descriptor->horiz_subsampling = avio_rb32(pb);
1011 descriptor->vert_subsampling = avio_rb32(pb);
1014 descriptor->sample_rate.num = avio_rb32(pb);
1015 descriptor->sample_rate.den = avio_rb32(pb);
1017 case 0x3D06: /* SoundEssenceCompression */
1018 avio_read(pb, descriptor->essence_codec_ul, 16);
1021 descriptor->channels = avio_rb32(pb);
1024 descriptor->bits_per_sample = avio_rb32(pb);
1027 mxf_read_pixel_layout(pb, descriptor);
1030 /* Private uid used by SONY C0023S01.mxf */
1031 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1032 if (descriptor->extradata)
1033 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1034 av_free(descriptor->extradata);
1035 descriptor->extradata_size = 0;
1036 descriptor->extradata = av_malloc(size);
1037 if (!descriptor->extradata)
1038 return AVERROR(ENOMEM);
1039 descriptor->extradata_size = size;
1040 avio_read(pb, descriptor->extradata, size);
1042 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1043 uint32_t rsiz = avio_rb16(pb);
1044 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1045 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1046 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1053 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1055 MXFTaggedValue *tagged_value = arg;
1061 avio_read(pb, key, 17);
1062 /* TODO: handle other types of of indirect values */
1063 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1064 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1065 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1066 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1071 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1073 MXFTaggedValue *tagged_value = arg;
1076 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1078 return mxf_read_indirect_value(tagged_value, pb, size);
1084 * Match an uid independently of the version byte and up to len common bytes
1087 static int mxf_match_uid(const UID key, const UID uid, int len)
1090 for (i = 0; i < len; i++) {
1091 if (i != 7 && key[i] != uid[i])
1097 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1099 while (uls->uid[0]) {
1100 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1107 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1113 for (i = 0; i < mxf->metadata_sets_count; i++) {
1114 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1115 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1116 return mxf->metadata_sets[i];
1122 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1123 // video essence container uls
1124 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1125 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x10,0x60,0x01 }, 14, AV_CODEC_ID_H264 }, /* H264 Frame wrapped */
1126 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x12,0x01,0x00 }, 14, AV_CODEC_ID_VC1 }, /* VC-1 Frame wrapped */
1127 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
1128 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x04,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* Type D-10 mapping of 40Mbps 525/60-I */
1129 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1130 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1131 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1132 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1135 /* EC ULs for intra-only formats */
1136 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1137 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
1138 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1141 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1142 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1143 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
1144 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1145 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1148 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1149 // sound essence container uls
1150 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
1151 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
1152 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
1153 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
1154 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
1155 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1158 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1159 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1160 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1163 static const char* const mxf_data_essence_descriptor[] = {
1164 "vbi_vanc_smpte_436M",
1167 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1169 int i, j, nb_segments = 0;
1170 MXFIndexTableSegment **unsorted_segments;
1171 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1173 /* count number of segments, allocate arrays and copy unsorted segments */
1174 for (i = 0; i < mxf->metadata_sets_count; i++)
1175 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1179 return AVERROR_INVALIDDATA;
1181 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1182 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1183 av_freep(sorted_segments);
1184 av_free(unsorted_segments);
1185 return AVERROR(ENOMEM);
1188 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1189 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1190 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1192 *nb_sorted_segments = 0;
1194 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1195 for (i = 0; i < nb_segments; i++) {
1196 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1197 uint64_t best_index_duration = 0;
1199 for (j = 0; j < nb_segments; j++) {
1200 MXFIndexTableSegment *s = unsorted_segments[j];
1202 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1203 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1204 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1206 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1207 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1208 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1210 best_body_sid = s->body_sid;
1211 best_index_sid = s->index_sid;
1212 best_index_start = s->index_start_position;
1213 best_index_duration = s->index_duration;
1217 /* no suitable entry found -> we're done */
1221 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1222 last_body_sid = best_body_sid;
1223 last_index_sid = best_index_sid;
1224 last_index_start = best_index_start;
1227 av_free(unsorted_segments);
1233 * Computes the absolute file offset of the given essence container offset
1235 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1238 int64_t offset_in = offset; /* for logging */
1240 for (x = 0; x < mxf->partitions_count; x++) {
1241 MXFPartition *p = &mxf->partitions[x];
1243 if (p->body_sid != body_sid)
1246 if (offset < p->essence_length || !p->essence_length) {
1247 *offset_out = p->essence_offset + offset;
1251 offset -= p->essence_length;
1254 av_log(mxf->fc, AV_LOG_ERROR,
1255 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1256 offset_in, body_sid);
1258 return AVERROR_INVALIDDATA;
1262 * Returns the end position of the essence container with given BodySID, or zero if unknown
1264 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1269 for (x = 0; x < mxf->partitions_count; x++) {
1270 MXFPartition *p = &mxf->partitions[x];
1272 if (p->body_sid != body_sid)
1275 if (!p->essence_length)
1278 ret = p->essence_offset + p->essence_length;
1284 /* EditUnit -> absolute offset */
1285 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
1288 int64_t offset_temp = 0;
1290 for (i = 0; i < index_table->nb_segments; i++) {
1291 MXFIndexTableSegment *s = index_table->segments[i];
1293 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1295 if (edit_unit < s->index_start_position + s->index_duration) {
1296 int64_t index = edit_unit - s->index_start_position;
1298 if (s->edit_unit_byte_count)
1299 offset_temp += s->edit_unit_byte_count * index;
1300 else if (s->nb_index_entries) {
1301 if (s->nb_index_entries == 2 * s->index_duration + 1)
1302 index *= 2; /* Avid index */
1304 if (index < 0 || index >= s->nb_index_entries) {
1305 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1306 index_table->index_sid, s->index_start_position);
1307 return AVERROR_INVALIDDATA;
1310 offset_temp = s->stream_offset_entries[index];
1312 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1313 index_table->index_sid, s->index_start_position);
1314 return AVERROR_INVALIDDATA;
1318 *edit_unit_out = edit_unit;
1320 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1322 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1323 offset_temp += s->edit_unit_byte_count * s->index_duration;
1328 av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid);
1330 return AVERROR_INVALIDDATA;
1333 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1336 int8_t max_temporal_offset = -128;
1339 /* first compute how many entries we have */
1340 for (i = 0; i < index_table->nb_segments; i++) {
1341 MXFIndexTableSegment *s = index_table->segments[i];
1343 if (!s->nb_index_entries) {
1344 index_table->nb_ptses = 0;
1345 return 0; /* no TemporalOffsets */
1348 index_table->nb_ptses += s->index_duration;
1351 /* paranoid check */
1352 if (index_table->nb_ptses <= 0)
1355 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1356 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1357 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1358 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1359 av_freep(&index_table->ptses);
1360 av_freep(&index_table->fake_index);
1361 av_freep(&index_table->offsets);
1362 return AVERROR(ENOMEM);
1365 /* we may have a few bad TemporalOffsets
1366 * make sure the corresponding PTSes don't have the bogus value 0 */
1367 for (x = 0; x < index_table->nb_ptses; x++)
1368 index_table->ptses[x] = AV_NOPTS_VALUE;
1382 * We want to transform it into this:
1393 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1394 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1395 * The latter makes DTS <= PTS.
1397 for (i = x = 0; i < index_table->nb_segments; i++) {
1398 MXFIndexTableSegment *s = index_table->segments[i];
1399 int index_delta = 1;
1400 int n = s->nb_index_entries;
1402 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1403 index_delta = 2; /* Avid index */
1404 /* ignore the last entry - it's the size of the essence container */
1408 for (j = 0; j < n; j += index_delta, x++) {
1409 int offset = s->temporal_offset_entries[j] / index_delta;
1410 int index = x + offset;
1412 if (x >= index_table->nb_ptses) {
1413 av_log(mxf->fc, AV_LOG_ERROR,
1414 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1415 s->nb_index_entries, s->index_duration);
1419 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1421 if (index < 0 || index >= index_table->nb_ptses) {
1422 av_log(mxf->fc, AV_LOG_ERROR,
1423 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1428 index_table->offsets[x] = offset;
1429 index_table->ptses[index] = x;
1430 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1434 /* calculate the fake index table in display order */
1435 for (x = 0; x < index_table->nb_ptses; x++) {
1436 index_table->fake_index[x].timestamp = x;
1437 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1438 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1442 index_table->first_dts = -max_temporal_offset;
1448 * Sorts and collects index table segments into index tables.
1449 * Also computes PTSes if possible.
1451 static int mxf_compute_index_tables(MXFContext *mxf)
1453 int i, j, k, ret, nb_sorted_segments;
1454 MXFIndexTableSegment **sorted_segments = NULL;
1456 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1457 nb_sorted_segments <= 0) {
1458 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1462 /* sanity check and count unique BodySIDs/IndexSIDs */
1463 for (i = 0; i < nb_sorted_segments; i++) {
1464 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1465 mxf->nb_index_tables++;
1466 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1467 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1468 ret = AVERROR_INVALIDDATA;
1469 goto finish_decoding_index;
1473 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1474 sizeof(*mxf->index_tables));
1475 if (!mxf->index_tables) {
1476 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1477 ret = AVERROR(ENOMEM);
1478 goto finish_decoding_index;
1481 /* distribute sorted segments to index tables */
1482 for (i = j = 0; i < nb_sorted_segments; i++) {
1483 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1488 mxf->index_tables[j].nb_segments++;
1491 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1492 MXFIndexTable *t = &mxf->index_tables[j];
1494 t->segments = av_mallocz_array(t->nb_segments,
1495 sizeof(*t->segments));
1498 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1499 " pointer array\n");
1500 ret = AVERROR(ENOMEM);
1501 goto finish_decoding_index;
1504 if (sorted_segments[i]->index_start_position)
1505 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1506 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1508 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1509 t->index_sid = sorted_segments[i]->index_sid;
1510 t->body_sid = sorted_segments[i]->body_sid;
1512 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1513 goto finish_decoding_index;
1515 /* fix zero IndexDurations */
1516 for (k = 0; k < t->nb_segments; k++) {
1517 if (t->segments[k]->index_duration)
1520 if (t->nb_segments > 1)
1521 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1524 if (mxf->fc->nb_streams <= 0) {
1525 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1529 /* assume the first stream's duration is reasonable
1530 * leave index_duration = 0 on further segments in case we have any (unlikely)
1532 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1538 finish_decoding_index:
1539 av_free(sorted_segments);
1543 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1545 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1546 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1547 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1548 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1551 static int mxf_uid_to_str(UID uid, char **str)
1555 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1557 return AVERROR(ENOMEM);
1558 for (i = 0; i < sizeof(UID); i++) {
1559 snprintf(p, 2 + 1, "%.2x", uid[i]);
1561 if (i == 3 || i == 5 || i == 7 || i == 9) {
1562 snprintf(p, 1 + 1, "-");
1569 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1573 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1575 return AVERROR(ENOMEM);
1576 snprintf(p, 2 + 1, "0x");
1578 for (i = 0; i < sizeof(UID); i++) {
1579 snprintf(p, 2 + 1, "%.2X", ul[i]);
1583 for (i = 0; i < sizeof(UID); i++) {
1584 snprintf(p, 2 + 1, "%.2X", uid[i]);
1590 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1596 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1598 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1602 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1604 char buf[AV_TIMECODE_STR_SIZE];
1605 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1610 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1612 MXFStructuralComponent *component = NULL;
1613 MXFPulldownComponent *pulldown = NULL;
1615 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1619 switch (component->type) {
1620 case TimecodeComponent:
1621 return (MXFTimecodeComponent*)component;
1622 case PulldownComponent: /* timcode component may be located on a pulldown component */
1623 pulldown = (MXFPulldownComponent*)component;
1624 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1631 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1633 MXFPackage *package = NULL;
1636 for (i = 0; i < mxf->packages_count; i++) {
1637 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1641 if (!memcmp(package->package_uid, package_uid, 16))
1647 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1649 MXFDescriptor *sub_descriptor = NULL;
1655 if (descriptor->type == MultipleDescriptor) {
1656 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1657 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1659 if (!sub_descriptor) {
1660 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1663 if (sub_descriptor->linked_track_id == track_id) {
1664 return sub_descriptor;
1667 } else if (descriptor->type == Descriptor)
1673 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1675 MXFStructuralComponent *component = NULL;
1676 MXFPackage *package = NULL;
1677 MXFDescriptor *descriptor = NULL;
1680 if (!essence_group || !essence_group->structural_components_count)
1683 /* essence groups contains multiple representations of the same media,
1684 this return the first components with a valid Descriptor typically index 0 */
1685 for (i =0; i < essence_group->structural_components_count; i++){
1686 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1690 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1693 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1700 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1702 MXFStructuralComponent *component = NULL;
1704 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1707 switch (component->type) {
1711 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1718 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1720 MXFTaggedValue *tag;
1724 for (i = 0; i < package->comment_count; i++) {
1725 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1726 if (!tag || !tag->name || !tag->value)
1729 size = strlen(tag->name) + 8 + 1;
1730 key = av_mallocz(size);
1732 return AVERROR(ENOMEM);
1734 snprintf(key, size, "comment_%s", tag->name);
1735 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1740 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1742 MXFPackage *physical_package = NULL;
1743 MXFTrack *physical_track = NULL;
1744 MXFStructuralComponent *sourceclip = NULL;
1745 MXFTimecodeComponent *mxf_tc = NULL;
1749 int64_t start_position;
1751 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1752 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1756 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1759 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1761 /* the name of physical source package is name of the reel or tape */
1762 if (physical_package->name && physical_package->name[0])
1763 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1765 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1766 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1768 for (j = 0; j < physical_package->tracks_count; j++) {
1769 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1770 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1774 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1775 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1779 if (physical_track->edit_rate.num <= 0 ||
1780 physical_track->edit_rate.den <= 0) {
1781 av_log(mxf->fc, AV_LOG_WARNING,
1782 "Invalid edit rate (%d/%d) found on structural"
1783 " component #%d, defaulting to 25/1\n",
1784 physical_track->edit_rate.num,
1785 physical_track->edit_rate.den, i);
1786 physical_track->edit_rate = (AVRational){25, 1};
1789 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1790 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1793 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1794 /* scale sourceclip start_position to match physical track edit rate */
1795 start_position = av_rescale_q(sourceclip->start_position,
1796 physical_track->edit_rate,
1797 source_track->edit_rate);
1799 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1800 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1810 static int mxf_parse_structural_metadata(MXFContext *mxf)
1812 MXFPackage *material_package = NULL;
1815 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1816 /* TODO: handle multiple material packages (OP3x) */
1817 for (i = 0; i < mxf->packages_count; i++) {
1818 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1819 if (material_package) break;
1821 if (!material_package) {
1822 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1823 return AVERROR_INVALIDDATA;
1826 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1827 if (material_package->name && material_package->name[0])
1828 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1829 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1831 for (i = 0; i < material_package->tracks_count; i++) {
1832 MXFPackage *source_package = NULL;
1833 MXFTrack *material_track = NULL;
1834 MXFTrack *source_track = NULL;
1835 MXFTrack *temp_track = NULL;
1836 MXFDescriptor *descriptor = NULL;
1837 MXFStructuralComponent *component = NULL;
1838 MXFTimecodeComponent *mxf_tc = NULL;
1839 UID *essence_container_ul = NULL;
1840 const MXFCodecUL *codec_ul = NULL;
1841 const MXFCodecUL *container_ul = NULL;
1842 const MXFCodecUL *pix_fmt_ul = NULL;
1847 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1848 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1852 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1853 mxf_tc = (MXFTimecodeComponent*)component;
1854 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1855 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1856 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1860 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1861 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1865 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1866 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1870 mxf_tc = (MXFTimecodeComponent*)component;
1871 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1872 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1873 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1878 /* TODO: handle multiple source clips */
1879 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1880 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1884 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1885 if (!source_package) {
1886 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1889 for (k = 0; k < source_package->tracks_count; k++) {
1890 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1891 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1892 ret = AVERROR_INVALIDDATA;
1895 if (temp_track->track_id == component->source_track_id) {
1896 source_track = temp_track;
1900 if (!source_track) {
1901 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1905 if (!source_track || !component)
1908 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1909 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1910 ret = AVERROR_INVALIDDATA;
1914 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1915 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1916 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1917 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1921 st = avformat_new_stream(mxf->fc, NULL);
1923 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1924 ret = AVERROR(ENOMEM);
1927 st->id = source_track->track_id;
1928 st->priv_data = source_track;
1930 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1931 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1933 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1934 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1935 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1936 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1938 source_track->original_duration = st->duration = component->duration;
1940 if (st->duration == -1)
1941 st->duration = AV_NOPTS_VALUE;
1942 st->start_time = component->start_position;
1943 if (material_track->edit_rate.num <= 0 ||
1944 material_track->edit_rate.den <= 0) {
1945 av_log(mxf->fc, AV_LOG_WARNING,
1946 "Invalid edit rate (%d/%d) found on stream #%d, "
1947 "defaulting to 25/1\n",
1948 material_track->edit_rate.num,
1949 material_track->edit_rate.den, st->index);
1950 material_track->edit_rate = (AVRational){25, 1};
1952 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1954 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1955 * the former is accessible via st->priv_data */
1956 source_track->edit_rate = material_track->edit_rate;
1958 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1959 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1960 st->codec->codec_type = codec_ul->id;
1963 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1966 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1967 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1968 essence_container_ul = &descriptor->essence_container_ul;
1969 /* HACK: replacing the original key with mxf_encrypted_essence_container
1970 * is not allowed according to s429-6, try to find correct information anyway */
1971 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1972 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1973 for (k = 0; k < mxf->metadata_sets_count; k++) {
1974 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1975 if (metadata->type == CryptoContext) {
1976 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1982 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1983 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1984 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1985 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
1986 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
1987 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1990 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1991 avcodec_get_name(st->codec->codec_id));
1992 for (k = 0; k < 16; k++) {
1993 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1994 descriptor->essence_codec_ul[k]);
1995 if (!(k+1 & 19) || k == 5)
1996 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1998 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2000 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2001 if (source_package->name && source_package->name[0])
2002 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2004 mxf_parse_physical_source_package(mxf, source_track, st);
2006 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2007 source_track->intra_only = mxf_is_intra_only(descriptor);
2008 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2009 if (st->codec->codec_id == AV_CODEC_ID_NONE)
2010 st->codec->codec_id = container_ul->id;
2011 st->codec->width = descriptor->width;
2012 st->codec->height = descriptor->height; /* Field height, not frame height */
2013 switch (descriptor->frame_layout) {
2015 st->codec->field_order = AV_FIELD_PROGRESSIVE;
2018 /* Every other line is stored and needs to be duplicated. */
2019 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2020 break; /* The correct thing to do here is fall through, but by breaking we might be
2021 able to decode some streams at half the vertical resolution, rather than not al all.
2022 It's also for compatibility with the old behavior. */
2025 case SegmentedFrame:
2026 st->codec->field_order = AV_FIELD_PROGRESSIVE;
2027 case SeparateFields:
2028 switch (descriptor->field_dominance) {
2030 st->codec->field_order = AV_FIELD_TT;
2033 st->codec->field_order = AV_FIELD_BB;
2036 avpriv_request_sample(mxf->fc,
2037 "Field dominance %d support",
2038 descriptor->field_dominance);
2039 case 0: // we already have many samples with field_dominance == unknown
2042 /* Turn field height into frame height. */
2043 st->codec->height *= 2;
2046 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2048 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2049 st->codec->pix_fmt = descriptor->pix_fmt;
2050 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2051 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2052 &descriptor->essence_codec_ul);
2053 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2054 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2055 st->codec->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2056 &descriptor->essence_codec_ul)->id;
2057 if (!st->codec->codec_tag) {
2058 /* support files created before RP224v10 by defaulting to UYVY422
2059 if subsampling is 4:2:2 and component depth is 8-bit */
2060 if (descriptor->horiz_subsampling == 2 &&
2061 descriptor->vert_subsampling == 1 &&
2062 descriptor->component_depth == 8) {
2063 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
2069 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2070 if (material_track->sequence->origin) {
2071 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2073 if (source_track->sequence->origin) {
2074 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2076 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2077 st->display_aspect_ratio = descriptor->aspect_ratio;
2078 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2079 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2080 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2081 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
2082 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2083 st->codec->channels = descriptor->channels;
2084 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2086 if (descriptor->sample_rate.den > 0) {
2087 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2088 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2090 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2091 "found for stream #%d, time base forced to 1/48000\n",
2092 descriptor->sample_rate.num, descriptor->sample_rate.den,
2094 avpriv_set_pts_info(st, 64, 1, 48000);
2097 /* if duration is set, rescale it from EditRate to SampleRate */
2098 if (st->duration != AV_NOPTS_VALUE)
2099 st->duration = av_rescale_q(st->duration,
2100 av_inv_q(material_track->edit_rate),
2103 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2104 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2105 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2106 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2107 else if (descriptor->bits_per_sample == 32)
2108 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2109 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2110 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2111 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2112 else if (descriptor->bits_per_sample == 32)
2113 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2114 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2115 st->need_parsing = AVSTREAM_PARSE_FULL;
2117 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2118 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2119 essence_container_ul)->id;
2120 if (codec_id >= 0 &&
2121 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2122 av_dict_set(&st->metadata, "data_type",
2123 mxf_data_essence_descriptor[codec_id], 0);
2126 if (descriptor->extradata) {
2127 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2128 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2130 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2131 ret = ff_generate_avci_extradata(st);
2135 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2136 /* TODO: decode timestamps */
2137 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2146 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2148 struct tm time = { 0 };
2149 time.tm_year = (timestamp >> 48) - 1900;
2150 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2151 time.tm_mday = (timestamp >> 32 & 0xFF);
2152 time.tm_hour = (timestamp >> 24 & 0xFF);
2153 time.tm_min = (timestamp >> 16 & 0xFF);
2154 time.tm_sec = (timestamp >> 8 & 0xFF);
2156 /* msvcrt versions of strftime calls the invalid parameter handler
2157 * (aborting the process if one isn't set) if the parameters are out
2159 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2160 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2161 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2162 time.tm_min = av_clip(time.tm_min, 0, 59);
2163 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2165 *str = av_mallocz(32);
2167 return AVERROR(ENOMEM);
2168 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2174 #define SET_STR_METADATA(pb, name, str) do { \
2175 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2177 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2180 #define SET_UID_METADATA(pb, name, var, str) do { \
2181 avio_read(pb, var, 16); \
2182 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2184 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2187 #define SET_TS_METADATA(pb, name, var, str) do { \
2188 var = avio_rb64(pb); \
2189 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2191 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2194 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2196 MXFContext *mxf = arg;
2197 AVFormatContext *s = mxf->fc;
2204 SET_STR_METADATA(pb, "company_name", str);
2207 SET_STR_METADATA(pb, "product_name", str);
2210 SET_STR_METADATA(pb, "product_version", str);
2213 SET_UID_METADATA(pb, "product_uid", uid, str);
2216 SET_TS_METADATA(pb, "modification_date", ts, str);
2219 SET_STR_METADATA(pb, "application_platform", str);
2222 SET_UID_METADATA(pb, "generation_uid", uid, str);
2225 SET_UID_METADATA(pb, "uid", uid, str);
2231 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2233 MXFContext *mxf = arg;
2234 AVFormatContext *s = mxf->fc;
2238 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2239 SET_STR_METADATA(pb, "project_name", str);
2244 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2245 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2246 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2247 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2248 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2249 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2250 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2251 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2252 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2253 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2254 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2255 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2256 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2257 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2258 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2259 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2260 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2261 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2262 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2263 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2264 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2265 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2266 { { 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 */
2267 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2268 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2269 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
2270 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2271 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2272 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2273 { { 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 */
2274 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2275 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2276 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2277 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2278 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2279 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2280 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2281 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2284 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2287 case MultipleDescriptor:
2289 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2290 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2298 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2300 AVIOContext *pb = mxf->fc->pb;
2301 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2302 uint64_t klv_end = avio_tell(pb) + klv->length;
2305 return AVERROR(ENOMEM);
2306 mxf_metadataset_init(ctx, type);
2307 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2309 int tag = avio_rb16(pb);
2310 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2311 uint64_t next = avio_tell(pb) + size;
2314 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2315 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2316 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2319 if (tag > 0x7FFF) { /* dynamic tag */
2321 for (i = 0; i < mxf->local_tags_count; i++) {
2322 int local_tag = AV_RB16(mxf->local_tags+i*18);
2323 if (local_tag == tag) {
2324 memcpy(uid, mxf->local_tags+i*18+2, 16);
2325 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2326 PRINT_KEY(mxf->fc, "uid", uid);
2330 if (ctx_size && tag == 0x3C0A) {
2331 avio_read(pb, ctx->uid, 16);
2332 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2333 mxf_free_metadataset(&ctx, !!ctx_size);
2337 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2338 * it extending past the end of the KLV though (zzuf5.mxf). */
2339 if (avio_tell(pb) > klv_end) {
2342 mxf_free_metadataset(&ctx, !!ctx_size);
2345 av_log(mxf->fc, AV_LOG_ERROR,
2346 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2348 return AVERROR_INVALIDDATA;
2349 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2350 avio_seek(pb, next, SEEK_SET);
2352 if (ctx_size) ctx->type = type;
2353 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2357 * Matches any partition pack key, in other words:
2361 * @return non-zero if the key is a partition pack key, zero otherwise
2363 static int mxf_is_partition_pack_key(UID key)
2365 //NOTE: this is a little lax since it doesn't constraint key[14]
2366 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2367 key[13] >= 2 && key[13] <= 4;
2371 * Parses a metadata KLV
2372 * @return <0 on error, 0 otherwise
2374 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2375 int ctx_size, enum MXFMetadataSetType type)
2377 AVFormatContext *s = mxf->fc;
2379 if (klv.key[5] == 0x53) {
2380 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2382 uint64_t next = avio_tell(s->pb) + klv.length;
2383 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2385 /* only seek forward, else this can loop for a long time */
2386 if (avio_tell(s->pb) > next) {
2387 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2389 return AVERROR_INVALIDDATA;
2392 avio_seek(s->pb, next, SEEK_SET);
2395 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2402 * Seeks to the previous partition and parses it, if possible
2403 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2405 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2407 AVIOContext *pb = mxf->fc->pb;
2409 int64_t current_partition_ofs;
2412 if (!mxf->current_partition ||
2413 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2414 return 0; /* we've parsed all partitions */
2416 /* seek to previous partition */
2417 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2418 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2419 mxf->current_partition = NULL;
2421 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2423 /* Make sure this is actually a PartitionPack, and if so parse it.
2426 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2427 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2431 if (!mxf_is_partition_pack_key(klv.key)) {
2432 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2433 return AVERROR_INVALIDDATA;
2436 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2437 * can point to just before the current partition, causing klv_read_packet()
2438 * to sync back up to it. See deadlock3.mxf
2440 if (klv.offset >= current_partition_ofs) {
2441 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2442 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2443 return AVERROR_INVALIDDATA;
2446 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2453 * Called when essence is encountered
2454 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2456 static int mxf_parse_handle_essence(MXFContext *mxf)
2458 AVIOContext *pb = mxf->fc->pb;
2461 if (mxf->parsing_backward) {
2462 return mxf_seek_to_previous_partition(mxf);
2464 if (!mxf->footer_partition) {
2465 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2469 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2471 /* remember where we were so we don't end up seeking further back than this */
2472 mxf->last_forward_tell = avio_tell(pb);
2474 if (!pb->seekable) {
2475 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2479 /* seek to FooterPartition and parse backward */
2480 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2481 av_log(mxf->fc, AV_LOG_ERROR,
2482 "failed to seek to FooterPartition @ 0x%" PRIx64
2483 " (%"PRId64") - partial file?\n",
2484 mxf->run_in + mxf->footer_partition, ret);
2488 mxf->current_partition = NULL;
2489 mxf->parsing_backward = 1;
2496 * Called when the next partition or EOF is encountered
2497 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2499 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2501 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2505 * Figures out the proper offset and length of the essence container in each partition
2507 static void mxf_compute_essence_containers(MXFContext *mxf)
2511 /* everything is already correct */
2512 if (mxf->op == OPAtom)
2515 for (x = 0; x < mxf->partitions_count; x++) {
2516 MXFPartition *p = &mxf->partitions[x];
2519 continue; /* BodySID == 0 -> no essence */
2521 if (x >= mxf->partitions_count - 1)
2522 break; /* FooterPartition - can't compute length (and we don't need to) */
2524 /* essence container spans to the next partition */
2525 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2527 if (p->essence_length < 0) {
2528 /* next ThisPartition < essence_offset */
2529 p->essence_length = 0;
2530 av_log(mxf->fc, AV_LOG_ERROR,
2531 "partition %i: bad ThisPartition = %"PRIX64"\n",
2532 x+1, mxf->partitions[x+1].this_partition);
2537 static int64_t round_to_kag(int64_t position, int kag_size)
2539 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2540 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2541 int64_t ret = (position / kag_size) * kag_size;
2542 return ret == position ? ret : ret + kag_size;
2545 static int is_pcm(enum AVCodecID codec_id)
2547 /* we only care about "normal" PCM codecs until we get samples */
2548 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2552 * Deal with the case where for some audio atoms EditUnitByteCount is
2553 * very small (2, 4..). In those cases we should read more than one
2554 * sample per call to mxf_read_packet().
2556 static void mxf_handle_small_eubc(AVFormatContext *s)
2558 MXFContext *mxf = s->priv_data;
2560 /* assuming non-OPAtom == frame wrapped
2561 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2562 if (mxf->op != OPAtom)
2565 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2566 if (s->nb_streams != 1 ||
2567 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2568 !is_pcm(s->streams[0]->codec->codec_id) ||
2569 mxf->nb_index_tables != 1 ||
2570 mxf->index_tables[0].nb_segments != 1 ||
2571 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2574 /* arbitrarily default to 48 kHz PAL audio frame size */
2575 /* TODO: We could compute this from the ratio between the audio
2576 * and video edit rates for 48 kHz NTSC we could use the
2577 * 1802-1802-1802-1802-1801 pattern. */
2578 mxf->edit_units_per_packet = 1920;
2582 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2584 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2586 AVFormatContext *s = mxf->fc;
2587 AVStream *st = NULL;
2588 MXFIndexTableSegment *segment = NULL;
2589 MXFPartition *p = NULL;
2590 int essence_partition_count = 0;
2593 if (mxf->op != OPAtom)
2596 /* TODO: support raw video without a index if they exist */
2597 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2600 /* check if file already has a IndexTableSegment */
2601 for (i = 0; i < mxf->metadata_sets_count; i++) {
2602 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2606 /* find the essence partition */
2607 for (i = 0; i < mxf->partitions_count; i++) {
2608 /* BodySID == 0 -> no essence */
2609 if (!mxf->partitions[i].body_sid)
2612 p = &mxf->partitions[i];
2613 essence_partition_count++;
2616 /* only handle files with a single essence partition */
2617 if (essence_partition_count != 1)
2620 if (!(segment = av_mallocz(sizeof(*segment))))
2621 return AVERROR(ENOMEM);
2623 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2624 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2629 segment->type = IndexTableSegment;
2630 /* stream will be treated as small EditUnitByteCount */
2631 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2632 segment->index_start_position = 0;
2633 segment->index_duration = s->streams[0]->duration;
2634 segment->index_sid = p->index_sid;
2635 segment->body_sid = p->body_sid;
2639 static void mxf_read_random_index_pack(AVFormatContext *s)
2641 MXFContext *mxf = s->priv_data;
2643 int64_t file_size, max_rip_length, min_rip_length;
2646 if (!s->pb->seekable)
2649 file_size = avio_size(s->pb);
2651 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2652 * The limit below assumes a file with nothing but partition packs and a RIP.
2653 * Before changing this, consider that a muxer may place each sample in its own partition.
2655 * 105 is the size of the smallest possible PartitionPack
2656 * 12 is the size of each RIP entry
2657 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2659 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2660 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2662 /* We're only interested in RIPs with at least two entries.. */
2663 min_rip_length = 16+1+24+4;
2665 /* See S377m section 11 */
2666 avio_seek(s->pb, file_size - 4, SEEK_SET);
2667 length = avio_rb32(s->pb);
2669 if (length < min_rip_length || length > max_rip_length)
2671 avio_seek(s->pb, file_size - length, SEEK_SET);
2672 if (klv_read_packet(&klv, s->pb) < 0 ||
2673 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2674 klv.length != length - 20)
2677 avio_skip(s->pb, klv.length - 12);
2678 mxf->footer_partition = avio_rb64(s->pb);
2681 if (mxf->run_in + mxf->footer_partition >= file_size) {
2682 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2683 mxf->footer_partition = 0;
2687 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2690 static int mxf_read_header(AVFormatContext *s)
2692 MXFContext *mxf = s->priv_data;
2694 int64_t essence_offset = 0;
2697 mxf->last_forward_tell = INT64_MAX;
2698 mxf->edit_units_per_packet = 1;
2700 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2701 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2702 return AVERROR_INVALIDDATA;
2704 avio_seek(s->pb, -14, SEEK_CUR);
2706 mxf->run_in = avio_tell(s->pb);
2708 mxf_read_random_index_pack(s);
2710 while (!avio_feof(s->pb)) {
2711 const MXFMetadataReadTableEntry *metadata;
2713 if (klv_read_packet(&klv, s->pb) < 0) {
2714 /* EOF - seek to previous partition or stop */
2715 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2721 PRINT_KEY(s, "read header", klv.key);
2722 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2723 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2724 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2725 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2726 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2728 if (!mxf->current_partition) {
2729 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2730 return AVERROR_INVALIDDATA;
2733 if (!mxf->current_partition->essence_offset) {
2734 /* for OP1a we compute essence_offset
2735 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2736 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2737 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2739 int64_t op1a_essence_offset =
2740 round_to_kag(mxf->current_partition->this_partition +
2741 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2742 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2743 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2745 if (mxf->op == OPAtom) {
2746 /* point essence_offset to the actual data
2747 * OPAtom has all the essence in one big KLV
2749 mxf->current_partition->essence_offset = avio_tell(s->pb);
2750 mxf->current_partition->essence_length = klv.length;
2752 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2753 mxf->current_partition->essence_offset = op1a_essence_offset;
2757 if (!essence_offset)
2758 essence_offset = klv.offset;
2760 /* seek to footer, previous partition or stop */
2761 if (mxf_parse_handle_essence(mxf) <= 0)
2764 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2765 /* next partition pack - keep going, seek to previous partition or stop */
2766 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2768 else if (mxf->parsing_backward)
2770 /* we're still parsing forward. proceed to parsing this partition pack */
2773 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2774 if (IS_KLV_KEY(klv.key, metadata->key)) {
2775 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2780 if (!metadata->read) {
2781 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2783 avio_skip(s->pb, klv.length);
2786 /* FIXME avoid seek */
2787 if (!essence_offset) {
2788 av_log(s, AV_LOG_ERROR, "no essence\n");
2789 ret = AVERROR_INVALIDDATA;
2792 avio_seek(s->pb, essence_offset, SEEK_SET);
2794 mxf_compute_essence_containers(mxf);
2796 /* we need to do this before computing the index tables
2797 * to be able to fill in zero IndexDurations with st->duration */
2798 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2801 mxf_handle_missing_index_segment(mxf);
2802 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2805 if (mxf->nb_index_tables > 1) {
2806 /* TODO: look up which IndexSID to use via EssenceContainerData */
2807 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2808 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2809 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2810 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2811 ret = AVERROR_INVALIDDATA;
2815 mxf_handle_small_eubc(s);
2825 * Sets mxf->current_edit_unit based on what offset we're currently at.
2826 * @return next_ofs if OK, <0 on error
2828 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2830 int64_t last_ofs = -1, next_ofs = -1;
2831 MXFIndexTable *t = &mxf->index_tables[0];
2833 /* this is called from the OP1a demuxing logic, which means there
2834 * may be no index tables */
2835 if (mxf->nb_index_tables <= 0)
2838 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2839 while (mxf->current_edit_unit >= 0) {
2840 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2843 if (next_ofs <= last_ofs) {
2844 /* large next_ofs didn't change or current_edit_unit wrapped
2845 * around this fixes the infinite loop on zzuf3.mxf */
2846 av_log(mxf->fc, AV_LOG_ERROR,
2847 "next_ofs didn't change. not deriving packet timestamps\n");
2851 if (next_ofs > current_offset)
2854 last_ofs = next_ofs;
2855 mxf->current_edit_unit++;
2858 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2859 if (mxf->current_edit_unit < 0)
2865 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2866 uint64_t *sample_count)
2868 int i, total = 0, size = 0;
2869 AVStream *st = mxf->fc->streams[stream_index];
2870 MXFTrack *track = st->priv_data;
2871 AVRational time_base = av_inv_q(track->edit_rate);
2872 AVRational sample_rate = av_inv_q(st->time_base);
2873 const MXFSamplesPerFrame *spf = NULL;
2875 if ((sample_rate.num / sample_rate.den) == 48000)
2876 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2878 int remainder = (sample_rate.num * time_base.num) %
2879 (time_base.den * sample_rate.den);
2880 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2881 av_mul_q(sample_rate, time_base)));
2883 av_log(mxf->fc, AV_LOG_WARNING,
2884 "seeking detected on stream #%d with time base (%d/%d) and "
2885 "sample rate (%d/%d), audio pts won't be accurate.\n",
2886 stream_index, time_base.num, time_base.den,
2887 sample_rate.num, sample_rate.den);
2891 while (spf->samples_per_frame[size]) {
2892 total += spf->samples_per_frame[size];
2898 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2899 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2900 *sample_count += spf->samples_per_frame[i];
2906 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2909 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2910 int64_t bits_per_sample = codec->bits_per_coded_sample;
2912 if (!bits_per_sample)
2913 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2915 pkt->pts = track->sample_count;
2917 if ( codec->channels <= 0
2918 || bits_per_sample <= 0
2919 || codec->channels * (int64_t)bits_per_sample < 8)
2920 return AVERROR(EINVAL);
2921 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2925 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2928 MXFContext *mxf = s->priv_data;
2931 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2932 PRINT_KEY(s, "read packet", klv.key);
2933 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2934 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2935 ret = mxf_decrypt_triplet(s, pkt, &klv);
2937 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2942 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2943 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2944 int index = mxf_get_stream_index(s, &klv);
2945 int64_t next_ofs, next_klv;
2948 AVCodecContext *codec;
2951 av_log(s, AV_LOG_ERROR,
2952 "error getting stream index %"PRIu32"\n",
2953 AV_RB32(klv.key + 12));
2957 st = s->streams[index];
2958 track = st->priv_data;
2960 if (s->streams[index]->discard == AVDISCARD_ALL)
2963 next_klv = avio_tell(s->pb) + klv.length;
2964 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2966 if (next_ofs >= 0 && next_klv > next_ofs) {
2967 /* if this check is hit then it's possible OPAtom was treated as OP1a
2968 * truncate the packet since it's probably very large (>2 GiB is common) */
2969 avpriv_request_sample(s,
2970 "OPAtom misinterpreted as OP1a? "
2971 "KLV for edit unit %i extending into "
2973 mxf->current_edit_unit);
2974 klv.length = next_ofs - avio_tell(s->pb);
2977 /* check for 8 channels AES3 element */
2978 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2979 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2982 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2986 ret = av_get_packet(s->pb, pkt, klv.length);
2990 pkt->stream_index = index;
2991 pkt->pos = klv.offset;
2995 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2996 /* mxf->current_edit_unit good - see if we have an
2997 * index table to derive timestamps from */
2998 MXFIndexTable *t = &mxf->index_tables[0];
3000 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
3001 pkt->dts = mxf->current_edit_unit + t->first_dts;
3002 pkt->pts = t->ptses[mxf->current_edit_unit];
3003 } else if (track->intra_only) {
3004 /* intra-only -> PTS = EditUnit.
3005 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3006 pkt->pts = mxf->current_edit_unit;
3008 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3009 ret = mxf_set_audio_pts(mxf, codec, pkt);
3014 /* seek for truncated packets */
3015 avio_seek(s->pb, next_klv, SEEK_SET);
3020 avio_skip(s->pb, klv.length);
3022 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3025 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3027 MXFContext *mxf = s->priv_data;
3029 int64_t ret64, pos, next_pos;
3034 if (mxf->op != OPAtom)
3035 return mxf_read_packet_old(s, pkt);
3037 // If we have no streams then we basically are at EOF
3038 if (s->nb_streams < 1)
3041 /* OPAtom - clip wrapped demuxing */
3042 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3044 t = &mxf->index_tables[0];
3046 if (mxf->current_edit_unit >= st->duration)
3049 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3051 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3054 /* compute size by finding the next edit unit or the end of the essence container
3055 * not pretty, but it works */
3056 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3057 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3058 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3059 return AVERROR_INVALIDDATA;
3062 if ((size = next_pos - pos) <= 0) {
3063 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3064 return AVERROR_INVALIDDATA;
3067 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3070 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3073 pkt->stream_index = 0;
3075 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3076 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3077 pkt->dts = mxf->current_edit_unit + t->first_dts;
3078 pkt->pts = t->ptses[mxf->current_edit_unit];
3079 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3080 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3085 mxf->current_edit_unit += edit_units;
3090 static int mxf_read_close(AVFormatContext *s)
3092 MXFContext *mxf = s->priv_data;
3095 av_freep(&mxf->packages_refs);
3097 for (i = 0; i < s->nb_streams; i++)
3098 s->streams[i]->priv_data = NULL;
3100 for (i = 0; i < mxf->metadata_sets_count; i++) {
3101 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3103 av_freep(&mxf->partitions);
3104 av_freep(&mxf->metadata_sets);
3105 av_freep(&mxf->aesc);
3106 av_freep(&mxf->local_tags);
3108 if (mxf->index_tables) {
3109 for (i = 0; i < mxf->nb_index_tables; i++) {
3110 av_freep(&mxf->index_tables[i].segments);
3111 av_freep(&mxf->index_tables[i].ptses);
3112 av_freep(&mxf->index_tables[i].fake_index);
3113 av_freep(&mxf->index_tables[i].offsets);
3116 av_freep(&mxf->index_tables);
3121 static int mxf_probe(AVProbeData *p) {
3122 const uint8_t *bufp = p->buf;
3123 const uint8_t *end = p->buf + p->buf_size;
3125 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3128 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3129 end -= sizeof(mxf_header_partition_pack_key);
3131 for (; bufp < end;) {
3132 if (!((bufp[13] - 1) & 0xF2)){
3133 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3134 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3135 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3136 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3137 return AVPROBE_SCORE_MAX;
3146 /* rudimentary byte seek */
3147 /* XXX: use MXF Index */
3148 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3150 AVStream *st = s->streams[stream_index];
3152 MXFContext* mxf = s->priv_data;
3156 MXFTrack *source_track = st->priv_data;
3158 /* if audio then truncate sample_time to EditRate */
3159 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3160 sample_time = av_rescale_q(sample_time, st->time_base,
3161 av_inv_q(source_track->edit_rate));
3163 if (mxf->nb_index_tables <= 0) {
3165 return AVERROR_INVALIDDATA;
3166 if (sample_time < 0)
3168 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3170 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3174 ff_update_cur_dts(s, st, sample_time);
3175 mxf->current_edit_unit = sample_time;
3177 t = &mxf->index_tables[0];
3179 /* clamp above zero, else ff_index_search_timestamp() returns negative
3180 * this also means we allow seeking before the start */
3181 sample_time = FFMAX(sample_time, 0);
3183 if (t->fake_index) {
3184 /* behave as if we have a proper index */
3185 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3187 /* get the stored order index from the display order index */
3188 sample_time += t->offsets[sample_time];
3190 /* no IndexEntryArray (one or more CBR segments)
3191 * make sure we don't seek past the end */
3192 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3195 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3198 ff_update_cur_dts(s, st, sample_time);
3199 mxf->current_edit_unit = sample_time;
3200 avio_seek(s->pb, seekpos, SEEK_SET);
3203 // Update all tracks sample count
3204 for (i = 0; i < s->nb_streams; i++) {
3205 AVStream *cur_st = s->streams[i];
3206 MXFTrack *cur_track = cur_st->priv_data;
3207 uint64_t current_sample_count = 0;
3208 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3209 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3213 cur_track->sample_count = current_sample_count;
3219 AVInputFormat ff_mxf_demuxer = {
3221 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3222 .flags = AVFMT_SEEK_TO_PTS,
3223 .priv_data_size = sizeof(MXFContext),
3224 .read_probe = mxf_probe,
3225 .read_header = mxf_read_header,
3226 .read_packet = mxf_read_packet,
3227 .read_close = mxf_read_close,
3228 .read_seek = mxf_read_seek,