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 */
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
97 enum MXFMetadataSetType type
;
98 UID source_container_ul
;
103 enum MXFMetadataSetType type
;
104 UID source_package_uid
;
105 UID data_definition_ul
;
107 int64_t start_position
;
109 } MXFStructuralComponent
;
113 enum MXFMetadataSetType type
;
114 UID data_definition_ul
;
115 UID
*structural_components_refs
;
116 int structural_components_count
;
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
;
147 MXFSequence
*sequence
; /* mandatory, and only one */
150 uint8_t track_number
[4];
151 AVRational edit_rate
;
153 uint64_t sample_count
;
154 int64_t original_duration
; /* st->duration in SampleRate/EditRate units */
159 enum MXFMetadataSetType type
;
160 UID essence_container_ul
;
161 UID essence_codec_ul
;
162 AVRational sample_rate
;
163 AVRational aspect_ratio
;
165 int height
; /* Field height, not frame height */
166 int frame_layout
; /* See MXFFrameLayout enum */
172 int64_t duration
; /* ContainerDuration optional property */
173 unsigned int component_depth
;
174 unsigned int horiz_subsampling
;
175 unsigned int vert_subsampling
;
176 UID
*sub_descriptors_refs
;
177 int sub_descriptors_count
;
181 enum AVPixelFormat pix_fmt
;
186 enum MXFMetadataSetType type
;
187 int edit_unit_byte_count
;
190 AVRational index_edit_rate
;
191 uint64_t index_start_position
;
192 uint64_t index_duration
;
193 int8_t *temporal_offset_entries
;
195 uint64_t *stream_offset_entries
;
196 int nb_index_entries
;
197 } MXFIndexTableSegment
;
201 enum MXFMetadataSetType type
;
205 MXFDescriptor
*descriptor
; /* only one */
212 enum MXFMetadataSetType type
;
215 /* decoded index table */
219 int nb_ptses
; /* number of PTSes or total duration of index */
220 int64_t first_dts
; /* DTS = EditUnit + first_dts */
221 int64_t *ptses
; /* maps EditUnit -> PTS */
223 MXFIndexTableSegment
**segments
; /* sorted by IndexStartPosition */
224 AVIndexEntry
*fake_index
; /* used for calling ff_index_search_timestamp() */
228 MXFPartition
*partitions
;
229 unsigned partitions_count
;
233 MXFMetadataSet
**metadata_sets
;
234 int metadata_sets_count
;
238 int local_tags_count
;
239 uint64_t footer_partition
;
240 KLVPacket current_klv_data
;
241 int current_klv_index
;
243 MXFPartition
*current_partition
;
244 int parsing_backward
;
245 int64_t last_forward_tell
;
246 int last_forward_partition
;
247 int current_edit_unit
;
249 MXFIndexTable
*index_tables
;
250 int edit_units_per_packet
; ///< how many edit units to read at a time (PCM, OPAtom)
253 enum MXFWrappingScheme
{
258 /* NOTE: klv_offset is not set (-1) for local keys */
259 typedef int MXFMetadataReadFunc(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
);
263 MXFMetadataReadFunc
*read
;
265 enum MXFMetadataSetType type
;
266 } MXFMetadataReadTableEntry
;
268 static int mxf_read_close(AVFormatContext
*s
);
270 /* partial keys to match */
271 static const uint8_t mxf_header_partition_pack_key
[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
272 static const uint8_t mxf_essence_element_key
[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
273 static const uint8_t mxf_avid_essence_element_key
[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
274 static const uint8_t mxf_system_item_key
[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
275 static const uint8_t mxf_klv_key
[] = { 0x06,0x0e,0x2b,0x34 };
276 /* complete keys to match */
277 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 };
278 static const uint8_t mxf_encrypted_triplet_key
[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
279 static const uint8_t mxf_encrypted_essence_container
[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
280 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 };
281 static const uint8_t mxf_sony_mpeg4_extradata
[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
283 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
285 static int64_t klv_decode_ber_length(AVIOContext
*pb
)
287 uint64_t size
= avio_r8(pb
);
288 if (size
& 0x80) { /* long form */
289 int bytes_num
= size
& 0x7f;
290 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
292 return AVERROR_INVALIDDATA
;
295 size
= size
<< 8 | avio_r8(pb
);
300 static int mxf_read_sync(AVIOContext
*pb
, const uint8_t *key
, unsigned size
)
303 for (i
= 0; i
< size
&& !avio_feof(pb
); i
++) {
307 else if (b
!= key
[i
])
313 static int klv_read_packet(KLVPacket
*klv
, AVIOContext
*pb
)
315 if (!mxf_read_sync(pb
, mxf_klv_key
, 4))
316 return AVERROR_INVALIDDATA
;
317 klv
->offset
= avio_tell(pb
) - 4;
318 memcpy(klv
->key
, mxf_klv_key
, 4);
319 avio_read(pb
, klv
->key
+ 4, 12);
320 klv
->length
= klv_decode_ber_length(pb
);
321 return klv
->length
== -1 ? -1 : 0;
324 static int mxf_get_stream_index(AVFormatContext
*s
, KLVPacket
*klv
)
328 for (i
= 0; i
< s
->nb_streams
; i
++) {
329 MXFTrack
*track
= s
->streams
[i
]->priv_data
;
331 if (!memcmp(klv
->key
+ sizeof(mxf_essence_element_key
), track
->track_number
, sizeof(track
->track_number
)))
334 /* return 0 if only one stream, for OP Atom files with 0 as track number */
335 return s
->nb_streams
== 1 ? 0 : -1;
338 /* XXX: use AVBitStreamFilter */
339 static int mxf_get_d10_aes3_packet(AVIOContext
*pb
, AVStream
*st
, AVPacket
*pkt
, int64_t length
)
341 const uint8_t *buf_ptr
, *end_ptr
;
345 if (length
> 61444) /* worst case PAL 1920 samples 8 channels */
346 return AVERROR_INVALIDDATA
;
347 length
= av_get_packet(pb
, pkt
, length
);
350 data_ptr
= pkt
->data
;
351 end_ptr
= pkt
->data
+ length
;
352 buf_ptr
= pkt
->data
+ 4; /* skip SMPTE 331M header */
353 for (; end_ptr
- buf_ptr
>= st
->codec
->channels
* 4; ) {
354 for (i
= 0; i
< st
->codec
->channels
; i
++) {
355 uint32_t sample
= bytestream_get_le32(&buf_ptr
);
356 if (st
->codec
->bits_per_coded_sample
== 24)
357 bytestream_put_le24(&data_ptr
, (sample
>> 4) & 0xffffff);
359 bytestream_put_le16(&data_ptr
, (sample
>> 12) & 0xffff);
361 buf_ptr
+= 32 - st
->codec
->channels
*4; // always 8 channels stored SMPTE 331M
363 av_shrink_packet(pkt
, data_ptr
- pkt
->data
);
367 static int mxf_decrypt_triplet(AVFormatContext
*s
, AVPacket
*pkt
, KLVPacket
*klv
)
369 static const uint8_t checkv
[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
370 MXFContext
*mxf
= s
->priv_data
;
371 AVIOContext
*pb
= s
->pb
;
372 int64_t end
= avio_tell(pb
) + klv
->length
;
375 uint64_t plaintext_size
;
380 if (!mxf
->aesc
&& s
->key
&& s
->keylen
== 16) {
381 mxf
->aesc
= av_aes_alloc();
383 return AVERROR(ENOMEM
);
384 av_aes_init(mxf
->aesc
, s
->key
, 128, 1);
387 avio_skip(pb
, klv_decode_ber_length(pb
));
389 klv_decode_ber_length(pb
);
390 plaintext_size
= avio_rb64(pb
);
392 klv_decode_ber_length(pb
);
393 avio_read(pb
, klv
->key
, 16);
394 if (!IS_KLV_KEY(klv
, mxf_essence_element_key
))
395 return AVERROR_INVALIDDATA
;
396 index
= mxf_get_stream_index(s
, klv
);
398 return AVERROR_INVALIDDATA
;
400 klv_decode_ber_length(pb
);
401 orig_size
= avio_rb64(pb
);
402 if (orig_size
< plaintext_size
)
403 return AVERROR_INVALIDDATA
;
405 size
= klv_decode_ber_length(pb
);
406 if (size
< 32 || size
- 32 < orig_size
)
407 return AVERROR_INVALIDDATA
;
408 avio_read(pb
, ivec
, 16);
409 avio_read(pb
, tmpbuf
, 16);
411 av_aes_crypt(mxf
->aesc
, tmpbuf
, tmpbuf
, 1, ivec
, 1);
412 if (memcmp(tmpbuf
, checkv
, 16))
413 av_log(s
, AV_LOG_ERROR
, "probably incorrect decryption key\n");
415 size
= av_get_packet(pb
, pkt
, size
);
418 else if (size
< plaintext_size
)
419 return AVERROR_INVALIDDATA
;
420 size
-= plaintext_size
;
422 av_aes_crypt(mxf
->aesc
, &pkt
->data
[plaintext_size
],
423 &pkt
->data
[plaintext_size
], size
>> 4, ivec
, 1);
424 av_shrink_packet(pkt
, orig_size
);
425 pkt
->stream_index
= index
;
426 avio_skip(pb
, end
- avio_tell(pb
));
430 static int mxf_read_primer_pack(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
432 MXFContext
*mxf
= arg
;
433 int item_num
= avio_rb32(pb
);
434 int item_len
= avio_rb32(pb
);
436 if (item_len
!= 18) {
437 avpriv_request_sample(pb
, "Primer pack item length %d", item_len
);
438 return AVERROR_PATCHWELCOME
;
440 if (item_num
> 65536) {
441 av_log(mxf
->fc
, AV_LOG_ERROR
, "item_num %d is too large\n", item_num
);
442 return AVERROR_INVALIDDATA
;
445 av_log(mxf
->fc
, AV_LOG_VERBOSE
, "Multiple primer packs\n");
446 av_free(mxf
->local_tags
);
447 mxf
->local_tags_count
= 0;
448 mxf
->local_tags
= av_calloc(item_num
, item_len
);
449 if (!mxf
->local_tags
)
450 return AVERROR(ENOMEM
);
451 mxf
->local_tags_count
= item_num
;
452 avio_read(pb
, mxf
->local_tags
, item_num
*item_len
);
456 static int mxf_read_partition_pack(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
458 MXFContext
*mxf
= arg
;
459 MXFPartition
*partition
, *tmp_part
;
461 uint64_t footer_partition
;
462 uint32_t nb_essence_containers
;
464 tmp_part
= av_realloc_array(mxf
->partitions
, mxf
->partitions_count
+ 1, sizeof(*mxf
->partitions
));
466 return AVERROR(ENOMEM
);
467 mxf
->partitions
= tmp_part
;
469 if (mxf
->parsing_backward
) {
470 /* insert the new partition pack in the middle
471 * this makes the entries in mxf->partitions sorted by offset */
472 memmove(&mxf
->partitions
[mxf
->last_forward_partition
+1],
473 &mxf
->partitions
[mxf
->last_forward_partition
],
474 (mxf
->partitions_count
- mxf
->last_forward_partition
)*sizeof(*mxf
->partitions
));
475 partition
= mxf
->current_partition
= &mxf
->partitions
[mxf
->last_forward_partition
];
477 mxf
->last_forward_partition
++;
478 partition
= mxf
->current_partition
= &mxf
->partitions
[mxf
->partitions_count
];
481 memset(partition
, 0, sizeof(*partition
));
482 mxf
->partitions_count
++;
483 partition
->pack_length
= avio_tell(pb
) - klv_offset
+ size
;
484 partition
->pack_ofs
= klv_offset
;
488 partition
->type
= Header
;
491 partition
->type
= BodyPartition
;
494 partition
->type
= Footer
;
497 av_log(mxf
->fc
, AV_LOG_ERROR
, "unknown partition type %i\n", uid
[13]);
498 return AVERROR_INVALIDDATA
;
501 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
502 partition
->closed
= partition
->type
== Footer
|| !(uid
[14] & 1);
503 partition
->complete
= uid
[14] > 2;
505 partition
->kag_size
= avio_rb32(pb
);
506 partition
->this_partition
= avio_rb64(pb
);
507 partition
->previous_partition
= avio_rb64(pb
);
508 footer_partition
= avio_rb64(pb
);
509 partition
->header_byte_count
= avio_rb64(pb
);
510 partition
->index_byte_count
= avio_rb64(pb
);
511 partition
->index_sid
= avio_rb32(pb
);
513 partition
->body_sid
= avio_rb32(pb
);
514 if (avio_read(pb
, op
, sizeof(UID
)) != sizeof(UID
)) {
515 av_log(mxf
->fc
, AV_LOG_ERROR
, "Failed reading UID\n");
516 return AVERROR_INVALIDDATA
;
518 nb_essence_containers
= avio_rb32(pb
);
520 if (partition
->this_partition
&&
521 partition
->previous_partition
== partition
->this_partition
) {
522 av_log(mxf
->fc
, AV_LOG_ERROR
,
523 "PreviousPartition equal to ThisPartition %"PRIx64
"\n",
524 partition
->previous_partition
);
525 /* override with the actual previous partition offset */
526 if (!mxf
->parsing_backward
&& mxf
->last_forward_partition
> 1) {
528 mxf
->partitions
+ mxf
->last_forward_partition
- 2;
529 partition
->previous_partition
= prev
->this_partition
;
531 /* if no previous body partition are found point to the header
533 if (partition
->previous_partition
== partition
->this_partition
)
534 partition
->previous_partition
= 0;
535 av_log(mxf
->fc
, AV_LOG_ERROR
,
536 "Overriding PreviousPartition with %"PRIx64
"\n",
537 partition
->previous_partition
);
540 /* some files don'thave FooterPartition set in every partition */
541 if (footer_partition
) {
542 if (mxf
->footer_partition
&& mxf
->footer_partition
!= footer_partition
) {
543 av_log(mxf
->fc
, AV_LOG_ERROR
,
544 "inconsistent FooterPartition value: %"PRIu64
" != %"PRIu64
"\n",
545 mxf
->footer_partition
, footer_partition
);
547 mxf
->footer_partition
= footer_partition
;
552 "PartitionPack: ThisPartition = 0x%"PRIX64
553 ", PreviousPartition = 0x%"PRIX64
", "
554 "FooterPartition = 0x%"PRIX64
", IndexSID = %i, BodySID = %i\n",
555 partition
->this_partition
,
556 partition
->previous_partition
, footer_partition
,
557 partition
->index_sid
, partition
->body_sid
);
559 /* sanity check PreviousPartition if set */
560 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
561 if (partition
->previous_partition
&&
562 mxf
->run_in
+ partition
->previous_partition
>= klv_offset
) {
563 av_log(mxf
->fc
, AV_LOG_ERROR
,
564 "PreviousPartition points to this partition or forward\n");
565 return AVERROR_INVALIDDATA
;
568 if (op
[12] == 1 && op
[13] == 1) mxf
->op
= OP1a
;
569 else if (op
[12] == 1 && op
[13] == 2) mxf
->op
= OP1b
;
570 else if (op
[12] == 1 && op
[13] == 3) mxf
->op
= OP1c
;
571 else if (op
[12] == 2 && op
[13] == 1) mxf
->op
= OP2a
;
572 else if (op
[12] == 2 && op
[13] == 2) mxf
->op
= OP2b
;
573 else if (op
[12] == 2 && op
[13] == 3) mxf
->op
= OP2c
;
574 else if (op
[12] == 3 && op
[13] == 1) mxf
->op
= OP3a
;
575 else if (op
[12] == 3 && op
[13] == 2) mxf
->op
= OP3b
;
576 else if (op
[12] == 3 && op
[13] == 3) mxf
->op
= OP3c
;
577 else if (op
[12] == 64&& op
[13] == 1) mxf
->op
= OPSONYOpt
;
578 else if (op
[12] == 0x10) {
579 /* SMPTE 390m: "There shall be exactly one essence container"
580 * The following block deals with files that violate this, namely:
581 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
582 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
583 if (nb_essence_containers
!= 1) {
584 MXFOP op
= nb_essence_containers
? OP1a
: OPAtom
;
588 av_log(mxf
->fc
, AV_LOG_WARNING
,
589 "\"OPAtom\" with %"PRIu32
" ECs - assuming %s\n",
590 nb_essence_containers
,
591 op
== OP1a
? "OP1a" : "OPAtom");
597 av_log(mxf
->fc
, AV_LOG_ERROR
, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op
[12], op
[13]);
601 if (partition
->kag_size
<= 0 || partition
->kag_size
> (1 << 20)) {
602 av_log(mxf
->fc
, AV_LOG_WARNING
, "invalid KAGSize %"PRId32
" - guessing ",
603 partition
->kag_size
);
605 if (mxf
->op
== OPSONYOpt
)
606 partition
->kag_size
= 512;
608 partition
->kag_size
= 1;
610 av_log(mxf
->fc
, AV_LOG_WARNING
, "%"PRId32
"\n", partition
->kag_size
);
616 static int mxf_add_metadata_set(MXFContext
*mxf
, void *metadata_set
)
618 MXFMetadataSet
**tmp
;
620 tmp
= av_realloc_array(mxf
->metadata_sets
, mxf
->metadata_sets_count
+ 1, sizeof(*mxf
->metadata_sets
));
622 return AVERROR(ENOMEM
);
623 mxf
->metadata_sets
= tmp
;
624 mxf
->metadata_sets
[mxf
->metadata_sets_count
] = metadata_set
;
625 mxf
->metadata_sets_count
++;
629 static int mxf_read_cryptographic_context(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
631 MXFCryptoContext
*cryptocontext
= arg
;
633 return AVERROR_INVALIDDATA
;
634 if (IS_KLV_KEY(uid
, mxf_crypto_source_container_ul
))
635 avio_read(pb
, cryptocontext
->source_container_ul
, 16);
639 static int mxf_read_content_storage(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
641 MXFContext
*mxf
= arg
;
644 if (mxf
->packages_refs
)
645 av_log(mxf
->fc
, AV_LOG_VERBOSE
, "Multiple packages_refs\n");
646 av_free(mxf
->packages_refs
);
647 mxf
->packages_count
= avio_rb32(pb
);
648 mxf
->packages_refs
= av_calloc(mxf
->packages_count
, sizeof(UID
));
649 if (!mxf
->packages_refs
)
650 return AVERROR(ENOMEM
);
651 avio_skip(pb
, 4); /* useless size of objects, always 16 according to specs */
652 avio_read(pb
, (uint8_t *)mxf
->packages_refs
, mxf
->packages_count
* sizeof(UID
));
658 static int mxf_read_source_clip(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
660 MXFStructuralComponent
*source_clip
= arg
;
663 source_clip
->duration
= avio_rb64(pb
);
666 source_clip
->start_position
= avio_rb64(pb
);
669 /* UMID, only get last 16 bytes */
671 avio_read(pb
, source_clip
->source_package_uid
, 16);
674 source_clip
->source_track_id
= avio_rb32(pb
);
680 static int mxf_read_timecode_component(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
682 MXFTimecodeComponent
*mxf_timecode
= arg
;
685 mxf_timecode
->start_frame
= avio_rb64(pb
);
688 mxf_timecode
->rate
= (AVRational
){avio_rb16(pb
), 1};
691 mxf_timecode
->drop_frame
= avio_r8(pb
);
697 static int mxf_read_pulldown_component(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
699 MXFPulldownComponent
*mxf_pulldown
= arg
;
702 avio_read(pb
, mxf_pulldown
->input_segment_ref
, 16);
708 static int mxf_read_track(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
710 MXFTrack
*track
= arg
;
713 track
->track_id
= avio_rb32(pb
);
716 avio_read(pb
, track
->track_number
, 4);
719 track
->edit_rate
.num
= avio_rb32(pb
);
720 track
->edit_rate
.den
= avio_rb32(pb
);
723 avio_read(pb
, track
->sequence_ref
, 16);
729 static int mxf_read_sequence(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
731 MXFSequence
*sequence
= arg
;
734 sequence
->duration
= avio_rb64(pb
);
737 avio_read(pb
, sequence
->data_definition_ul
, 16);
740 sequence
->origin
= avio_r8(pb
);
743 sequence
->structural_components_count
= avio_rb32(pb
);
744 sequence
->structural_components_refs
= av_calloc(sequence
->structural_components_count
, sizeof(UID
));
745 if (!sequence
->structural_components_refs
) {
746 sequence
->structural_components_count
= 0;
747 return AVERROR(ENOMEM
);
749 avio_skip(pb
, 4); /* useless size of objects, always 16 according to specs */
750 avio_read(pb
, (uint8_t *)sequence
->structural_components_refs
, sequence
->structural_components_count
* sizeof(UID
));
756 static int mxf_read_essence_group(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
758 MXFEssenceGroup
*essence_group
= arg
;
761 essence_group
->duration
= avio_rb64(pb
);
764 essence_group
->structural_components_count
= avio_rb32(pb
);
765 essence_group
->structural_components_refs
= av_calloc(essence_group
->structural_components_count
, sizeof(UID
));
766 if (!essence_group
->structural_components_refs
) {
767 essence_group
->structural_components_count
= 0;
768 return AVERROR(ENOMEM
);
770 avio_skip(pb
, 4); /* useless size of objects, always 16 according to specs */
771 avio_read(pb
, (uint8_t *)essence_group
->structural_components_refs
, essence_group
->structural_components_count
* sizeof(UID
));
777 static int mxf_read_utf16_string(AVIOContext
*pb
, int size
, char** str
)
783 return AVERROR(EINVAL
);
785 buf_size
= size
+ size
/ 2 + 1;
786 *str
= av_malloc(buf_size
);
788 return AVERROR(ENOMEM
);
790 if ((ret
= avio_get_str16be(pb
, size
, *str
, buf_size
)) < 0) {
798 static int mxf_read_package(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
800 MXFPackage
*package
= arg
;
803 package
->tracks_count
= avio_rb32(pb
);
804 package
->tracks_refs
= av_calloc(package
->tracks_count
, sizeof(UID
));
805 if (!package
->tracks_refs
)
806 return AVERROR(ENOMEM
);
807 avio_skip(pb
, 4); /* useless size of objects, always 16 according to specs */
808 avio_read(pb
, (uint8_t *)package
->tracks_refs
, package
->tracks_count
* sizeof(UID
));
811 /* UMID, only get last 16 bytes */
813 avio_read(pb
, package
->package_uid
, 16);
816 avio_read(pb
, package
->descriptor_ref
, 16);
819 return mxf_read_utf16_string(pb
, size
, &package
->name
);
824 static int mxf_read_index_entry_array(AVIOContext
*pb
, MXFIndexTableSegment
*segment
)
828 segment
->nb_index_entries
= avio_rb32(pb
);
830 length
= avio_rb32(pb
);
832 if (!(segment
->temporal_offset_entries
=av_calloc(segment
->nb_index_entries
, sizeof(*segment
->temporal_offset_entries
))) ||
833 !(segment
->flag_entries
= av_calloc(segment
->nb_index_entries
, sizeof(*segment
->flag_entries
))) ||
834 !(segment
->stream_offset_entries
= av_calloc(segment
->nb_index_entries
, sizeof(*segment
->stream_offset_entries
))))
835 return AVERROR(ENOMEM
);
837 for (i
= 0; i
< segment
->nb_index_entries
; i
++) {
838 segment
->temporal_offset_entries
[i
] = avio_r8(pb
);
839 avio_r8(pb
); /* KeyFrameOffset */
840 segment
->flag_entries
[i
] = avio_r8(pb
);
841 segment
->stream_offset_entries
[i
] = avio_rb64(pb
);
842 avio_skip(pb
, length
- 11);
847 static int mxf_read_index_table_segment(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
849 MXFIndexTableSegment
*segment
= arg
;
852 segment
->edit_unit_byte_count
= avio_rb32(pb
);
853 av_dlog(NULL
, "EditUnitByteCount %d\n", segment
->edit_unit_byte_count
);
856 segment
->index_sid
= avio_rb32(pb
);
857 av_dlog(NULL
, "IndexSID %d\n", segment
->index_sid
);
860 segment
->body_sid
= avio_rb32(pb
);
861 av_dlog(NULL
, "BodySID %d\n", segment
->body_sid
);
864 av_dlog(NULL
, "IndexEntryArray found\n");
865 return mxf_read_index_entry_array(pb
, segment
);
867 segment
->index_edit_rate
.num
= avio_rb32(pb
);
868 segment
->index_edit_rate
.den
= avio_rb32(pb
);
869 av_dlog(NULL
, "IndexEditRate %d/%d\n", segment
->index_edit_rate
.num
,
870 segment
->index_edit_rate
.den
);
873 segment
->index_start_position
= avio_rb64(pb
);
874 av_dlog(NULL
, "IndexStartPosition %"PRId64
"\n", segment
->index_start_position
);
877 segment
->index_duration
= avio_rb64(pb
);
878 av_dlog(NULL
, "IndexDuration %"PRId64
"\n", segment
->index_duration
);
884 static void mxf_read_pixel_layout(AVIOContext
*pb
, MXFDescriptor
*descriptor
)
886 int code
, value
, ofs
= 0;
887 char layout
[16] = {0}; /* not for printing, may end up not terminated on purpose */
892 av_dlog(NULL
, "pixel layout: code %#x\n", code
);
895 layout
[ofs
++] = code
;
896 layout
[ofs
++] = value
;
898 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
899 } while (code
!= 0); /* SMPTE 377M E.2.46 */
901 ff_mxf_decode_pixel_layout(layout
, &descriptor
->pix_fmt
);
904 static int mxf_read_generic_descriptor(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID uid
, int64_t klv_offset
)
906 MXFDescriptor
*descriptor
= arg
;
909 descriptor
->sub_descriptors_count
= avio_rb32(pb
);
910 descriptor
->sub_descriptors_refs
= av_calloc(descriptor
->sub_descriptors_count
, sizeof(UID
));
911 if (!descriptor
->sub_descriptors_refs
)
912 return AVERROR(ENOMEM
);
913 avio_skip(pb
, 4); /* useless size of objects, always 16 according to specs */
914 avio_read(pb
, (uint8_t *)descriptor
->sub_descriptors_refs
, descriptor
->sub_descriptors_count
* sizeof(UID
));
916 case 0x3002: /* ContainerDuration */
917 descriptor
->duration
= avio_rb64(pb
);
920 avio_read(pb
, descriptor
->essence_container_ul
, 16);
923 descriptor
->linked_track_id
= avio_rb32(pb
);
925 case 0x3201: /* PictureEssenceCoding */
926 avio_read(pb
, descriptor
->essence_codec_ul
, 16);
929 descriptor
->width
= avio_rb32(pb
);
932 descriptor
->height
= avio_rb32(pb
);
935 descriptor
->frame_layout
= avio_r8(pb
);
938 descriptor
->aspect_ratio
.num
= avio_rb32(pb
);
939 descriptor
->aspect_ratio
.den
= avio_rb32(pb
);
942 descriptor
->field_dominance
= avio_r8(pb
);
945 descriptor
->component_depth
= avio_rb32(pb
);
948 descriptor
->horiz_subsampling
= avio_rb32(pb
);
951 descriptor
->vert_subsampling
= avio_rb32(pb
);
954 descriptor
->sample_rate
.num
= avio_rb32(pb
);
955 descriptor
->sample_rate
.den
= avio_rb32(pb
);
957 case 0x3D06: /* SoundEssenceCompression */
958 avio_read(pb
, descriptor
->essence_codec_ul
, 16);
961 descriptor
->channels
= avio_rb32(pb
);
964 descriptor
->bits_per_sample
= avio_rb32(pb
);
967 mxf_read_pixel_layout(pb
, descriptor
);
970 /* Private uid used by SONY C0023S01.mxf */
971 if (IS_KLV_KEY(uid
, mxf_sony_mpeg4_extradata
)) {
972 if (descriptor
->extradata
)
973 av_log(NULL
, AV_LOG_WARNING
, "Duplicate sony_mpeg4_extradata\n");
974 av_free(descriptor
->extradata
);
975 descriptor
->extradata_size
= 0;
976 descriptor
->extradata
= av_malloc(size
);
977 if (!descriptor
->extradata
)
978 return AVERROR(ENOMEM
);
979 descriptor
->extradata_size
= size
;
980 avio_read(pb
, descriptor
->extradata
, size
);
988 * Match an uid independently of the version byte and up to len common bytes
991 static int mxf_match_uid(const UID key
, const UID uid
, int len
)
994 for (i
= 0; i
< len
; i
++) {
995 if (i
!= 7 && key
[i
] != uid
[i
])
1001 static const MXFCodecUL
*mxf_get_codec_ul(const MXFCodecUL
*uls
, UID
*uid
)
1003 while (uls
->uid
[0]) {
1004 if(mxf_match_uid(uls
->uid
, *uid
, uls
->matching_len
))
1011 static void *mxf_resolve_strong_ref(MXFContext
*mxf
, UID
*strong_ref
, enum MXFMetadataSetType type
)
1017 for (i
= 0; i
< mxf
->metadata_sets_count
; i
++) {
1018 if (!memcmp(*strong_ref
, mxf
->metadata_sets
[i
]->uid
, 16) &&
1019 (type
== AnyType
|| mxf
->metadata_sets
[i
]->type
== type
)) {
1020 return mxf
->metadata_sets
[i
];
1026 static const MXFCodecUL mxf_picture_essence_container_uls
[] = {
1027 // video essence container uls
1028 { { 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 */
1029 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO
}, /* DV 625 25mbps */
1030 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO
}, /* Uncompressed Picture */
1031 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO
}, /* Legacy ?? Uncompressed Picture */
1032 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE
},
1035 /* EC ULs for intra-only formats */
1036 static const MXFCodecUL mxf_intra_only_essence_container_uls
[] = {
1037 { { 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 */
1038 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE
},
1041 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1042 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls
[] = {
1043 { { 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 */
1044 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000
}, /* JPEG2000 Codestream */
1045 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE
},
1048 static const MXFCodecUL mxf_sound_essence_container_uls
[] = {
1049 // sound essence container uls
1050 { { 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 */
1051 { { 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 */
1052 { { 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 */
1053 { { 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 */
1054 { { 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) */
1055 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE
},
1058 static const MXFCodecUL mxf_data_essence_container_uls
[] = {
1059 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1060 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE
},
1063 static const char* const mxf_data_essence_descriptor
[] = {
1064 "vbi_vanc_smpte_436M",
1067 static int mxf_get_sorted_table_segments(MXFContext
*mxf
, int *nb_sorted_segments
, MXFIndexTableSegment
***sorted_segments
)
1069 int i
, j
, nb_segments
= 0;
1070 MXFIndexTableSegment
**unsorted_segments
;
1071 int last_body_sid
= -1, last_index_sid
= -1, last_index_start
= -1;
1073 /* count number of segments, allocate arrays and copy unsorted segments */
1074 for (i
= 0; i
< mxf
->metadata_sets_count
; i
++)
1075 if (mxf
->metadata_sets
[i
]->type
== IndexTableSegment
)
1079 return AVERROR_INVALIDDATA
;
1081 if (!(unsorted_segments
= av_calloc(nb_segments
, sizeof(*unsorted_segments
))) ||
1082 !(*sorted_segments
= av_calloc(nb_segments
, sizeof(**sorted_segments
)))) {
1083 av_freep(sorted_segments
);
1084 av_free(unsorted_segments
);
1085 return AVERROR(ENOMEM
);
1088 for (i
= j
= 0; i
< mxf
->metadata_sets_count
; i
++)
1089 if (mxf
->metadata_sets
[i
]->type
== IndexTableSegment
)
1090 unsorted_segments
[j
++] = (MXFIndexTableSegment
*)mxf
->metadata_sets
[i
];
1092 *nb_sorted_segments
= 0;
1094 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1095 for (i
= 0; i
< nb_segments
; i
++) {
1096 int best
= -1, best_body_sid
= -1, best_index_sid
= -1, best_index_start
= -1;
1097 uint64_t best_index_duration
= 0;
1099 for (j
= 0; j
< nb_segments
; j
++) {
1100 MXFIndexTableSegment
*s
= unsorted_segments
[j
];
1102 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1103 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1104 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1106 if ((i
== 0 || s
->body_sid
> last_body_sid
|| s
->index_sid
> last_index_sid
|| s
->index_start_position
> last_index_start
) &&
1107 (best
== -1 || s
->body_sid
< best_body_sid
|| s
->index_sid
< best_index_sid
|| s
->index_start_position
< best_index_start
||
1108 (s
->index_start_position
== best_index_start
&& s
->index_duration
> best_index_duration
))) {
1110 best_body_sid
= s
->body_sid
;
1111 best_index_sid
= s
->index_sid
;
1112 best_index_start
= s
->index_start_position
;
1113 best_index_duration
= s
->index_duration
;
1117 /* no suitable entry found -> we're done */
1121 (*sorted_segments
)[(*nb_sorted_segments
)++] = unsorted_segments
[best
];
1122 last_body_sid
= best_body_sid
;
1123 last_index_sid
= best_index_sid
;
1124 last_index_start
= best_index_start
;
1127 av_free(unsorted_segments
);
1133 * Computes the absolute file offset of the given essence container offset
1135 static int mxf_absolute_bodysid_offset(MXFContext
*mxf
, int body_sid
, int64_t offset
, int64_t *offset_out
)
1138 int64_t offset_in
= offset
; /* for logging */
1140 for (x
= 0; x
< mxf
->partitions_count
; x
++) {
1141 MXFPartition
*p
= &mxf
->partitions
[x
];
1143 if (p
->body_sid
!= body_sid
)
1146 if (offset
< p
->essence_length
|| !p
->essence_length
) {
1147 *offset_out
= p
->essence_offset
+ offset
;
1151 offset
-= p
->essence_length
;
1154 av_log(mxf
->fc
, AV_LOG_ERROR
,
1155 "failed to find absolute offset of %"PRIX64
" in BodySID %i - partial file?\n",
1156 offset_in
, body_sid
);
1158 return AVERROR_INVALIDDATA
;
1162 * Returns the end position of the essence container with given BodySID, or zero if unknown
1164 static int64_t mxf_essence_container_end(MXFContext
*mxf
, int body_sid
)
1169 for (x
= 0; x
< mxf
->partitions_count
; x
++) {
1170 MXFPartition
*p
= &mxf
->partitions
[x
];
1172 if (p
->body_sid
!= body_sid
)
1175 if (!p
->essence_length
)
1178 ret
= p
->essence_offset
+ p
->essence_length
;
1184 /* EditUnit -> absolute offset */
1185 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
)
1188 int64_t offset_temp
= 0;
1190 for (i
= 0; i
< index_table
->nb_segments
; i
++) {
1191 MXFIndexTableSegment
*s
= index_table
->segments
[i
];
1193 edit_unit
= FFMAX(edit_unit
, s
->index_start_position
); /* clamp if trying to seek before start */
1195 if (edit_unit
< s
->index_start_position
+ s
->index_duration
) {
1196 int64_t index
= edit_unit
- s
->index_start_position
;
1198 if (s
->edit_unit_byte_count
)
1199 offset_temp
+= s
->edit_unit_byte_count
* index
;
1200 else if (s
->nb_index_entries
) {
1201 if (s
->nb_index_entries
== 2 * s
->index_duration
+ 1)
1202 index
*= 2; /* Avid index */
1204 if (index
< 0 || index
>= s
->nb_index_entries
) {
1205 av_log(mxf
->fc
, AV_LOG_ERROR
, "IndexSID %i segment at %"PRId64
" IndexEntryArray too small\n",
1206 index_table
->index_sid
, s
->index_start_position
);
1207 return AVERROR_INVALIDDATA
;
1210 offset_temp
= s
->stream_offset_entries
[index
];
1212 av_log(mxf
->fc
, AV_LOG_ERROR
, "IndexSID %i segment at %"PRId64
" missing EditUnitByteCount and IndexEntryArray\n",
1213 index_table
->index_sid
, s
->index_start_position
);
1214 return AVERROR_INVALIDDATA
;
1218 *edit_unit_out
= edit_unit
;
1220 return mxf_absolute_bodysid_offset(mxf
, index_table
->body_sid
, offset_temp
, offset_out
);
1222 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1223 offset_temp
+= s
->edit_unit_byte_count
* s
->index_duration
;
1228 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
);
1230 return AVERROR_INVALIDDATA
;
1233 static int mxf_compute_ptses_fake_index(MXFContext
*mxf
, MXFIndexTable
*index_table
)
1236 int8_t max_temporal_offset
= -128;
1238 /* first compute how many entries we have */
1239 for (i
= 0; i
< index_table
->nb_segments
; i
++) {
1240 MXFIndexTableSegment
*s
= index_table
->segments
[i
];
1242 if (!s
->nb_index_entries
) {
1243 index_table
->nb_ptses
= 0;
1244 return 0; /* no TemporalOffsets */
1247 index_table
->nb_ptses
+= s
->index_duration
;
1250 /* paranoid check */
1251 if (index_table
->nb_ptses
<= 0)
1254 if (!(index_table
->ptses
= av_calloc(index_table
->nb_ptses
, sizeof(int64_t))) ||
1255 !(index_table
->fake_index
= av_calloc(index_table
->nb_ptses
, sizeof(AVIndexEntry
)))) {
1256 av_freep(&index_table
->ptses
);
1257 return AVERROR(ENOMEM
);
1260 /* we may have a few bad TemporalOffsets
1261 * make sure the corresponding PTSes don't have the bogus value 0 */
1262 for (x
= 0; x
< index_table
->nb_ptses
; x
++)
1263 index_table
->ptses
[x
] = AV_NOPTS_VALUE
;
1277 * We want to transform it into this:
1288 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1289 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1290 * The latter makes DTS <= PTS.
1292 for (i
= x
= 0; i
< index_table
->nb_segments
; i
++) {
1293 MXFIndexTableSegment
*s
= index_table
->segments
[i
];
1294 int index_delta
= 1;
1295 int n
= s
->nb_index_entries
;
1297 if (s
->nb_index_entries
== 2 * s
->index_duration
+ 1) {
1298 index_delta
= 2; /* Avid index */
1299 /* ignore the last entry - it's the size of the essence container */
1303 for (j
= 0; j
< n
; j
+= index_delta
, x
++) {
1304 int offset
= s
->temporal_offset_entries
[j
] / index_delta
;
1305 int index
= x
+ offset
;
1307 if (x
>= index_table
->nb_ptses
) {
1308 av_log(mxf
->fc
, AV_LOG_ERROR
,
1309 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64
"?\n",
1310 s
->nb_index_entries
, s
->index_duration
);
1314 index_table
->fake_index
[x
].timestamp
= x
;
1315 index_table
->fake_index
[x
].flags
= !(s
->flag_entries
[j
] & 0x30) ? AVINDEX_KEYFRAME
: 0;
1317 if (index
< 0 || index
>= index_table
->nb_ptses
) {
1318 av_log(mxf
->fc
, AV_LOG_ERROR
,
1319 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1324 index_table
->ptses
[index
] = x
;
1325 max_temporal_offset
= FFMAX(max_temporal_offset
, offset
);
1329 index_table
->first_dts
= -max_temporal_offset
;
1335 * Sorts and collects index table segments into index tables.
1336 * Also computes PTSes if possible.
1338 static int mxf_compute_index_tables(MXFContext
*mxf
)
1340 int i
, j
, k
, ret
, nb_sorted_segments
;
1341 MXFIndexTableSegment
**sorted_segments
= NULL
;
1343 if ((ret
= mxf_get_sorted_table_segments(mxf
, &nb_sorted_segments
, &sorted_segments
)) ||
1344 nb_sorted_segments
<= 0) {
1345 av_log(mxf
->fc
, AV_LOG_WARNING
, "broken or empty index\n");
1349 /* sanity check and count unique BodySIDs/IndexSIDs */
1350 for (i
= 0; i
< nb_sorted_segments
; i
++) {
1351 if (i
== 0 || sorted_segments
[i
-1]->index_sid
!= sorted_segments
[i
]->index_sid
)
1352 mxf
->nb_index_tables
++;
1353 else if (sorted_segments
[i
-1]->body_sid
!= sorted_segments
[i
]->body_sid
) {
1354 av_log(mxf
->fc
, AV_LOG_ERROR
, "found inconsistent BodySID\n");
1355 ret
= AVERROR_INVALIDDATA
;
1356 goto finish_decoding_index
;
1360 mxf
->index_tables
= av_mallocz_array(mxf
->nb_index_tables
,
1361 sizeof(*mxf
->index_tables
));
1362 if (!mxf
->index_tables
) {
1363 av_log(mxf
->fc
, AV_LOG_ERROR
, "failed to allocate index tables\n");
1364 ret
= AVERROR(ENOMEM
);
1365 goto finish_decoding_index
;
1368 /* distribute sorted segments to index tables */
1369 for (i
= j
= 0; i
< nb_sorted_segments
; i
++) {
1370 if (i
!= 0 && sorted_segments
[i
-1]->index_sid
!= sorted_segments
[i
]->index_sid
) {
1375 mxf
->index_tables
[j
].nb_segments
++;
1378 for (i
= j
= 0; j
< mxf
->nb_index_tables
; i
+= mxf
->index_tables
[j
++].nb_segments
) {
1379 MXFIndexTable
*t
= &mxf
->index_tables
[j
];
1381 t
->segments
= av_mallocz_array(t
->nb_segments
,
1382 sizeof(*t
->segments
));
1385 av_log(mxf
->fc
, AV_LOG_ERROR
, "failed to allocate IndexTableSegment"
1386 " pointer array\n");
1387 ret
= AVERROR(ENOMEM
);
1388 goto finish_decoding_index
;
1391 if (sorted_segments
[i
]->index_start_position
)
1392 av_log(mxf
->fc
, AV_LOG_WARNING
, "IndexSID %i starts at EditUnit %"PRId64
" - seeking may not work as expected\n",
1393 sorted_segments
[i
]->index_sid
, sorted_segments
[i
]->index_start_position
);
1395 memcpy(t
->segments
, &sorted_segments
[i
], t
->nb_segments
* sizeof(MXFIndexTableSegment
*));
1396 t
->index_sid
= sorted_segments
[i
]->index_sid
;
1397 t
->body_sid
= sorted_segments
[i
]->body_sid
;
1399 if ((ret
= mxf_compute_ptses_fake_index(mxf
, t
)) < 0)
1400 goto finish_decoding_index
;
1402 /* fix zero IndexDurations */
1403 for (k
= 0; k
< t
->nb_segments
; k
++) {
1404 if (t
->segments
[k
]->index_duration
)
1407 if (t
->nb_segments
> 1)
1408 av_log(mxf
->fc
, AV_LOG_WARNING
, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1411 if (mxf
->fc
->nb_streams
<= 0) {
1412 av_log(mxf
->fc
, AV_LOG_WARNING
, "no streams?\n");
1416 /* assume the first stream's duration is reasonable
1417 * leave index_duration = 0 on further segments in case we have any (unlikely)
1419 t
->segments
[k
]->index_duration
= mxf
->fc
->streams
[0]->duration
;
1425 finish_decoding_index
:
1426 av_free(sorted_segments
);
1430 static int mxf_is_intra_only(MXFDescriptor
*descriptor
)
1432 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls
,
1433 &descriptor
->essence_container_ul
)->id
!= AV_CODEC_ID_NONE
||
1434 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls
,
1435 &descriptor
->essence_codec_ul
)->id
!= AV_CODEC_ID_NONE
;
1438 static int mxf_uid_to_str(UID uid
, char **str
)
1442 p
= *str
= av_mallocz(sizeof(UID
) * 2 + 4 + 1);
1444 return AVERROR(ENOMEM
);
1445 for (i
= 0; i
< sizeof(UID
); i
++) {
1446 snprintf(p
, 2 + 1, "%.2x", uid
[i
]);
1448 if (i
== 3 || i
== 5 || i
== 7 || i
== 9) {
1449 snprintf(p
, 1 + 1, "-");
1456 static int mxf_add_uid_metadata(AVDictionary
**pm
, const char *key
, UID uid
)
1460 if ((ret
= mxf_uid_to_str(uid
, &str
)) < 0)
1462 av_dict_set(pm
, key
, str
, AV_DICT_DONT_STRDUP_VAL
);
1466 static int mxf_add_timecode_metadata(AVDictionary
**pm
, const char *key
, AVTimecode
*tc
)
1468 char buf
[AV_TIMECODE_STR_SIZE
];
1469 av_dict_set(pm
, key
, av_timecode_make_string(tc
, buf
, 0), 0);
1474 static MXFTimecodeComponent
* mxf_resolve_timecode_component(MXFContext
*mxf
, UID
*strong_ref
)
1476 MXFStructuralComponent
*component
= NULL
;
1477 MXFPulldownComponent
*pulldown
= NULL
;
1479 component
= mxf_resolve_strong_ref(mxf
, strong_ref
, AnyType
);
1483 switch (component
->type
) {
1484 case TimecodeComponent
:
1485 return (MXFTimecodeComponent
*)component
;
1486 case PulldownComponent
: /* timcode component may be located on a pulldown component */
1487 pulldown
= (MXFPulldownComponent
*)component
;
1488 return mxf_resolve_strong_ref(mxf
, &pulldown
->input_segment_ref
, TimecodeComponent
);
1495 static MXFPackage
* mxf_resolve_source_package(MXFContext
*mxf
, UID package_uid
)
1497 MXFPackage
*package
= NULL
;
1500 for (i
= 0; i
< mxf
->packages_count
; i
++) {
1501 package
= mxf_resolve_strong_ref(mxf
, &mxf
->packages_refs
[i
], SourcePackage
);
1505 if (!memcmp(package
->package_uid
, package_uid
, 16))
1511 static MXFStructuralComponent
* mxf_resolve_essence_group_choice(MXFContext
*mxf
, MXFEssenceGroup
*essence_group
)
1513 MXFStructuralComponent
*component
= NULL
;
1514 MXFPackage
*package
= NULL
;
1515 MXFDescriptor
*descriptor
= NULL
;
1518 if (!essence_group
|| !essence_group
->structural_components_count
)
1521 /* essence groups contains multiple representations of the same media,
1522 this return the first components with a valid Descriptor typically index 0 */
1523 for (i
=0; i
< essence_group
->structural_components_count
; i
++){
1524 component
= mxf_resolve_strong_ref(mxf
, &essence_group
->structural_components_refs
[i
], SourceClip
);
1528 if (!(package
= mxf_resolve_source_package(mxf
, component
->source_package_uid
)))
1531 descriptor
= mxf_resolve_strong_ref(mxf
, &package
->descriptor_ref
, Descriptor
);
1533 /* HACK: force the duration of the component to match the duration of the descriptor */
1534 if (descriptor
->duration
!= AV_NOPTS_VALUE
)
1535 component
->duration
= descriptor
->duration
;
1542 static MXFStructuralComponent
* mxf_resolve_sourceclip(MXFContext
*mxf
, UID
*strong_ref
)
1544 MXFStructuralComponent
*component
= NULL
;
1546 component
= mxf_resolve_strong_ref(mxf
, strong_ref
, AnyType
);
1549 switch (component
->type
) {
1553 return mxf_resolve_essence_group_choice(mxf
, (MXFEssenceGroup
*) component
);
1560 static int mxf_parse_physical_source_package(MXFContext
*mxf
, MXFTrack
*source_track
, AVStream
*st
)
1562 MXFPackage
*physical_package
= NULL
;
1563 MXFTrack
*physical_track
= NULL
;
1564 MXFStructuralComponent
*sourceclip
= NULL
;
1565 MXFTimecodeComponent
*mxf_tc
= NULL
;
1569 int64_t start_position
;
1571 for (i
= 0; i
< source_track
->sequence
->structural_components_count
; i
++) {
1572 sourceclip
= mxf_resolve_strong_ref(mxf
, &source_track
->sequence
->structural_components_refs
[i
], SourceClip
);
1576 if (!(physical_package
= mxf_resolve_source_package(mxf
, sourceclip
->source_package_uid
)))
1579 mxf_add_uid_metadata(&st
->metadata
, "reel_uid", physical_package
->package_uid
);
1581 /* the name of physical source package is name of the reel or tape */
1582 if (physical_package
->name
&& physical_package
->name
[0])
1583 av_dict_set(&st
->metadata
, "reel_name", physical_package
->name
, 0);
1585 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1586 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1588 for (j
= 0; j
< physical_package
->tracks_count
; j
++) {
1589 if (!(physical_track
= mxf_resolve_strong_ref(mxf
, &physical_package
->tracks_refs
[j
], Track
))) {
1590 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve source track strong ref\n");
1594 if (!(physical_track
->sequence
= mxf_resolve_strong_ref(mxf
, &physical_track
->sequence_ref
, Sequence
))) {
1595 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve source track sequence strong ref\n");
1599 for (k
= 0; k
< physical_track
->sequence
->structural_components_count
; k
++) {
1600 if (!(mxf_tc
= mxf_resolve_timecode_component(mxf
, &physical_track
->sequence
->structural_components_refs
[k
])))
1603 flags
= mxf_tc
->drop_frame
== 1 ? AV_TIMECODE_FLAG_DROPFRAME
: 0;
1604 /* scale sourceclip start_position to match physical track edit rate */
1605 start_position
= av_rescale_q(sourceclip
->start_position
,
1606 physical_track
->edit_rate
,
1607 source_track
->edit_rate
);
1609 if (av_timecode_init(&tc
, mxf_tc
->rate
, flags
, start_position
+ mxf_tc
->start_frame
, mxf
->fc
) == 0) {
1610 mxf_add_timecode_metadata(&st
->metadata
, "timecode", &tc
);
1620 static int mxf_parse_structural_metadata(MXFContext
*mxf
)
1622 MXFPackage
*material_package
= NULL
;
1625 av_dlog(mxf
->fc
, "metadata sets count %d\n", mxf
->metadata_sets_count
);
1626 /* TODO: handle multiple material packages (OP3x) */
1627 for (i
= 0; i
< mxf
->packages_count
; i
++) {
1628 material_package
= mxf_resolve_strong_ref(mxf
, &mxf
->packages_refs
[i
], MaterialPackage
);
1629 if (material_package
) break;
1631 if (!material_package
) {
1632 av_log(mxf
->fc
, AV_LOG_ERROR
, "no material package found\n");
1633 return AVERROR_INVALIDDATA
;
1636 mxf_add_uid_metadata(&mxf
->fc
->metadata
, "material_package_uid", material_package
->package_uid
);
1637 if (material_package
->name
&& material_package
->name
[0])
1638 av_dict_set(&mxf
->fc
->metadata
, "material_package_name", material_package
->name
, 0);
1640 for (i
= 0; i
< material_package
->tracks_count
; i
++) {
1641 MXFPackage
*source_package
= NULL
;
1642 MXFTrack
*material_track
= NULL
;
1643 MXFTrack
*source_track
= NULL
;
1644 MXFTrack
*temp_track
= NULL
;
1645 MXFDescriptor
*descriptor
= NULL
;
1646 MXFStructuralComponent
*component
= NULL
;
1647 MXFTimecodeComponent
*mxf_tc
= NULL
;
1648 UID
*essence_container_ul
= NULL
;
1649 const MXFCodecUL
*codec_ul
= NULL
;
1650 const MXFCodecUL
*container_ul
= NULL
;
1651 const MXFCodecUL
*pix_fmt_ul
= NULL
;
1656 if (!(material_track
= mxf_resolve_strong_ref(mxf
, &material_package
->tracks_refs
[i
], Track
))) {
1657 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve material track strong ref\n");
1661 if ((component
= mxf_resolve_strong_ref(mxf
, &material_track
->sequence_ref
, TimecodeComponent
))) {
1662 mxf_tc
= (MXFTimecodeComponent
*)component
;
1663 flags
= mxf_tc
->drop_frame
== 1 ? AV_TIMECODE_FLAG_DROPFRAME
: 0;
1664 if (av_timecode_init(&tc
, mxf_tc
->rate
, flags
, mxf_tc
->start_frame
, mxf
->fc
) == 0) {
1665 mxf_add_timecode_metadata(&mxf
->fc
->metadata
, "timecode", &tc
);
1669 if (!(material_track
->sequence
= mxf_resolve_strong_ref(mxf
, &material_track
->sequence_ref
, Sequence
))) {
1670 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve material track sequence strong ref\n");
1674 for (j
= 0; j
< material_track
->sequence
->structural_components_count
; j
++) {
1675 component
= mxf_resolve_strong_ref(mxf
, &material_track
->sequence
->structural_components_refs
[j
], TimecodeComponent
);
1679 mxf_tc
= (MXFTimecodeComponent
*)component
;
1680 flags
= mxf_tc
->drop_frame
== 1 ? AV_TIMECODE_FLAG_DROPFRAME
: 0;
1681 if (av_timecode_init(&tc
, mxf_tc
->rate
, flags
, mxf_tc
->start_frame
, mxf
->fc
) == 0) {
1682 mxf_add_timecode_metadata(&mxf
->fc
->metadata
, "timecode", &tc
);
1687 /* TODO: handle multiple source clips */
1688 for (j
= 0; j
< material_track
->sequence
->structural_components_count
; j
++) {
1689 component
= mxf_resolve_sourceclip(mxf
, &material_track
->sequence
->structural_components_refs
[j
]);
1693 source_package
= mxf_resolve_source_package(mxf
, component
->source_package_uid
);
1694 if (!source_package
) {
1695 av_dlog(mxf
->fc
, "material track %d: no corresponding source package found\n", material_track
->track_id
);
1698 for (k
= 0; k
< source_package
->tracks_count
; k
++) {
1699 if (!(temp_track
= mxf_resolve_strong_ref(mxf
, &source_package
->tracks_refs
[k
], Track
))) {
1700 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve source track strong ref\n");
1701 ret
= AVERROR_INVALIDDATA
;
1704 if (temp_track
->track_id
== component
->source_track_id
) {
1705 source_track
= temp_track
;
1709 if (!source_track
) {
1710 av_log(mxf
->fc
, AV_LOG_ERROR
, "material track %d: no corresponding source track found\n", material_track
->track_id
);
1714 if (!source_track
|| !component
)
1717 if (!(source_track
->sequence
= mxf_resolve_strong_ref(mxf
, &source_track
->sequence_ref
, Sequence
))) {
1718 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve source track sequence strong ref\n");
1719 ret
= AVERROR_INVALIDDATA
;
1723 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1724 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1725 if (memcmp(material_track
->sequence
->data_definition_ul
, source_track
->sequence
->data_definition_ul
, 16)) {
1726 av_log(mxf
->fc
, AV_LOG_ERROR
, "material track %d: DataDefinition mismatch\n", material_track
->track_id
);
1730 st
= avformat_new_stream(mxf
->fc
, NULL
);
1732 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not allocate stream\n");
1733 ret
= AVERROR(ENOMEM
);
1736 st
->id
= source_track
->track_id
;
1737 st
->priv_data
= source_track
;
1738 source_track
->original_duration
= st
->duration
= component
->duration
;
1739 if (st
->duration
== -1)
1740 st
->duration
= AV_NOPTS_VALUE
;
1741 st
->start_time
= component
->start_position
;
1742 if (material_track
->edit_rate
.num
<= 0 ||
1743 material_track
->edit_rate
.den
<= 0) {
1744 av_log(mxf
->fc
, AV_LOG_WARNING
,
1745 "Invalid edit rate (%d/%d) found on stream #%d, "
1746 "defaulting to 25/1\n",
1747 material_track
->edit_rate
.num
,
1748 material_track
->edit_rate
.den
, st
->index
);
1749 material_track
->edit_rate
= (AVRational
){25, 1};
1751 avpriv_set_pts_info(st
, 64, material_track
->edit_rate
.den
, material_track
->edit_rate
.num
);
1753 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1754 * the former is accessible via st->priv_data */
1755 source_track
->edit_rate
= material_track
->edit_rate
;
1757 PRINT_KEY(mxf
->fc
, "data definition ul", source_track
->sequence
->data_definition_ul
);
1758 codec_ul
= mxf_get_codec_ul(ff_mxf_data_definition_uls
, &source_track
->sequence
->data_definition_ul
);
1759 st
->codec
->codec_type
= codec_ul
->id
;
1761 source_package
->descriptor
= mxf_resolve_strong_ref(mxf
, &source_package
->descriptor_ref
, AnyType
);
1762 if (source_package
->descriptor
) {
1763 if (source_package
->descriptor
->type
== MultipleDescriptor
) {
1764 for (j
= 0; j
< source_package
->descriptor
->sub_descriptors_count
; j
++) {
1765 MXFDescriptor
*sub_descriptor
= mxf_resolve_strong_ref(mxf
, &source_package
->descriptor
->sub_descriptors_refs
[j
], Descriptor
);
1767 if (!sub_descriptor
) {
1768 av_log(mxf
->fc
, AV_LOG_ERROR
, "could not resolve sub descriptor strong ref\n");
1771 if (sub_descriptor
->linked_track_id
== source_track
->track_id
) {
1772 descriptor
= sub_descriptor
;
1776 } else if (source_package
->descriptor
->type
== Descriptor
)
1777 descriptor
= source_package
->descriptor
;
1780 av_log(mxf
->fc
, AV_LOG_INFO
, "source track %d: stream %d, no descriptor found\n", source_track
->track_id
, st
->index
);
1783 PRINT_KEY(mxf
->fc
, "essence codec ul", descriptor
->essence_codec_ul
);
1784 PRINT_KEY(mxf
->fc
, "essence container ul", descriptor
->essence_container_ul
);
1785 essence_container_ul
= &descriptor
->essence_container_ul
;
1786 /* HACK: replacing the original key with mxf_encrypted_essence_container
1787 * is not allowed according to s429-6, try to find correct information anyway */
1788 if (IS_KLV_KEY(essence_container_ul
, mxf_encrypted_essence_container
)) {
1789 av_log(mxf
->fc
, AV_LOG_INFO
, "broken encrypted mxf file\n");
1790 for (k
= 0; k
< mxf
->metadata_sets_count
; k
++) {
1791 MXFMetadataSet
*metadata
= mxf
->metadata_sets
[k
];
1792 if (metadata
->type
== CryptoContext
) {
1793 essence_container_ul
= &((MXFCryptoContext
*)metadata
)->source_container_ul
;
1799 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1800 codec_ul
= mxf_get_codec_ul(ff_mxf_codec_uls
, &descriptor
->essence_codec_ul
);
1801 st
->codec
->codec_id
= (enum AVCodecID
)codec_ul
->id
;
1802 av_log(mxf
->fc
, AV_LOG_VERBOSE
, "%s: Universal Label: ",
1803 avcodec_get_name(st
->codec
->codec_id
));
1804 for (k
= 0; k
< 16; k
++) {
1805 av_log(mxf
->fc
, AV_LOG_VERBOSE
, "%.2x",
1806 descriptor
->essence_codec_ul
[k
]);
1807 if (!(k
+1 & 19) || k
== 5)
1808 av_log(mxf
->fc
, AV_LOG_VERBOSE
, ".");
1810 av_log(mxf
->fc
, AV_LOG_VERBOSE
, "\n");
1812 mxf_add_uid_metadata(&st
->metadata
, "file_package_uid", source_package
->package_uid
);
1813 if (source_package
->name
&& source_package
->name
[0])
1814 av_dict_set(&st
->metadata
, "file_package_name", source_package
->name
, 0);
1816 mxf_parse_physical_source_package(mxf
, source_track
, st
);
1818 if (st
->codec
->codec_type
== AVMEDIA_TYPE_VIDEO
) {
1819 source_track
->intra_only
= mxf_is_intra_only(descriptor
);
1820 container_ul
= mxf_get_codec_ul(mxf_picture_essence_container_uls
, essence_container_ul
);
1821 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
)
1822 st
->codec
->codec_id
= container_ul
->id
;
1823 st
->codec
->width
= descriptor
->width
;
1824 st
->codec
->height
= descriptor
->height
; /* Field height, not frame height */
1825 switch (descriptor
->frame_layout
) {
1826 case SegmentedFrame
:
1827 /* This one is a weird layout I don't fully understand. */
1828 av_log(mxf
->fc
, AV_LOG_INFO
, "SegmentedFrame layout isn't currently supported\n");
1831 st
->codec
->field_order
= AV_FIELD_PROGRESSIVE
;
1834 /* Every other line is stored and needs to be duplicated. */
1835 av_log(mxf
->fc
, AV_LOG_INFO
, "OneField frame layout isn't currently supported\n");
1836 break; /* The correct thing to do here is fall through, but by breaking we might be
1837 able to decode some streams at half the vertical resolution, rather than not al all.
1838 It's also for compatibility with the old behavior. */
1841 case SeparateFields
:
1842 switch (descriptor
->field_dominance
) {
1844 st
->codec
->field_order
= AV_FIELD_TT
;
1847 st
->codec
->field_order
= AV_FIELD_BB
;
1850 avpriv_request_sample(mxf
->fc
,
1851 "Field dominance %d support",
1852 descriptor
->field_dominance
);
1853 case 0: // we already have many samples with field_dominance == unknown
1856 /* Turn field height into frame height. */
1857 st
->codec
->height
*= 2;
1860 av_log(mxf
->fc
, AV_LOG_INFO
, "Unknown frame layout type: %d\n", descriptor
->frame_layout
);
1862 if (st
->codec
->codec_id
== AV_CODEC_ID_RAWVIDEO
) {
1863 st
->codec
->pix_fmt
= descriptor
->pix_fmt
;
1864 if (st
->codec
->pix_fmt
== AV_PIX_FMT_NONE
) {
1865 pix_fmt_ul
= mxf_get_codec_ul(ff_mxf_pixel_format_uls
,
1866 &descriptor
->essence_codec_ul
);
1867 st
->codec
->pix_fmt
= (enum AVPixelFormat
)pix_fmt_ul
->id
;
1868 if (st
->codec
->pix_fmt
== AV_PIX_FMT_NONE
) {
1869 /* support files created before RP224v10 by defaulting to UYVY422
1870 if subsampling is 4:2:2 and component depth is 8-bit */
1871 if (descriptor
->horiz_subsampling
== 2 &&
1872 descriptor
->vert_subsampling
== 1 &&
1873 descriptor
->component_depth
== 8) {
1874 st
->codec
->pix_fmt
= AV_PIX_FMT_UYVY422
;
1879 st
->need_parsing
= AVSTREAM_PARSE_HEADERS
;
1880 if (material_track
->sequence
->origin
) {
1881 av_dict_set_int(&st
->metadata
, "material_track_origin", material_track
->sequence
->origin
, 0);
1883 if (source_track
->sequence
->origin
) {
1884 av_dict_set_int(&st
->metadata
, "source_track_origin", source_track
->sequence
->origin
, 0);
1886 if (descriptor
->aspect_ratio
.num
&& descriptor
->aspect_ratio
.den
)
1887 st
->display_aspect_ratio
= descriptor
->aspect_ratio
;
1888 } else if (st
->codec
->codec_type
== AVMEDIA_TYPE_AUDIO
) {
1889 container_ul
= mxf_get_codec_ul(mxf_sound_essence_container_uls
, essence_container_ul
);
1890 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1891 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
))
1892 st
->codec
->codec_id
= (enum AVCodecID
)container_ul
->id
;
1893 st
->codec
->channels
= descriptor
->channels
;
1894 st
->codec
->bits_per_coded_sample
= descriptor
->bits_per_sample
;
1896 if (descriptor
->sample_rate
.den
> 0) {
1897 st
->codec
->sample_rate
= descriptor
->sample_rate
.num
/ descriptor
->sample_rate
.den
;
1898 avpriv_set_pts_info(st
, 64, descriptor
->sample_rate
.den
, descriptor
->sample_rate
.num
);
1900 av_log(mxf
->fc
, AV_LOG_WARNING
, "invalid sample rate (%d/%d) "
1901 "found for stream #%d, time base forced to 1/48000\n",
1902 descriptor
->sample_rate
.num
, descriptor
->sample_rate
.den
,
1904 avpriv_set_pts_info(st
, 64, 1, 48000);
1907 /* if duration is set, rescale it from EditRate to SampleRate */
1908 if (st
->duration
!= AV_NOPTS_VALUE
)
1909 st
->duration
= av_rescale_q(st
->duration
,
1910 av_inv_q(material_track
->edit_rate
),
1913 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1914 if (st
->codec
->codec_id
== AV_CODEC_ID_PCM_S16LE
) {
1915 if (descriptor
->bits_per_sample
> 16 && descriptor
->bits_per_sample
<= 24)
1916 st
->codec
->codec_id
= AV_CODEC_ID_PCM_S24LE
;
1917 else if (descriptor
->bits_per_sample
== 32)
1918 st
->codec
->codec_id
= AV_CODEC_ID_PCM_S32LE
;
1919 } else if (st
->codec
->codec_id
== AV_CODEC_ID_PCM_S16BE
) {
1920 if (descriptor
->bits_per_sample
> 16 && descriptor
->bits_per_sample
<= 24)
1921 st
->codec
->codec_id
= AV_CODEC_ID_PCM_S24BE
;
1922 else if (descriptor
->bits_per_sample
== 32)
1923 st
->codec
->codec_id
= AV_CODEC_ID_PCM_S32BE
;
1924 } else if (st
->codec
->codec_id
== AV_CODEC_ID_MP2
) {
1925 st
->need_parsing
= AVSTREAM_PARSE_FULL
;
1927 } else if (st
->codec
->codec_type
== AVMEDIA_TYPE_DATA
) {
1928 int codec_id
= mxf_get_codec_ul(mxf_data_essence_container_uls
,
1929 essence_container_ul
)->id
;
1930 if (codec_id
>= 0 &&
1931 codec_id
< FF_ARRAY_ELEMS(mxf_data_essence_descriptor
)) {
1932 av_dict_set(&st
->metadata
, "data_type",
1933 mxf_data_essence_descriptor
[codec_id
], 0);
1936 if (descriptor
->extradata
) {
1937 if (!ff_alloc_extradata(st
->codec
, descriptor
->extradata_size
)) {
1938 memcpy(st
->codec
->extradata
, descriptor
->extradata
, descriptor
->extradata_size
);
1940 } else if (st
->codec
->codec_id
== AV_CODEC_ID_H264
) {
1941 ret
= ff_generate_avci_extradata(st
);
1945 if (st
->codec
->codec_type
!= AVMEDIA_TYPE_DATA
&& (*essence_container_ul
)[15] > 0x01) {
1946 /* TODO: decode timestamps */
1947 st
->need_parsing
= AVSTREAM_PARSE_TIMESTAMPS
;
1956 static int mxf_timestamp_to_str(uint64_t timestamp
, char **str
)
1958 struct tm time
= { 0 };
1959 time
.tm_year
= (timestamp
>> 48) - 1900;
1960 time
.tm_mon
= (timestamp
>> 40 & 0xFF) - 1;
1961 time
.tm_mday
= (timestamp
>> 32 & 0xFF);
1962 time
.tm_hour
= (timestamp
>> 24 & 0xFF);
1963 time
.tm_min
= (timestamp
>> 16 & 0xFF);
1964 time
.tm_sec
= (timestamp
>> 8 & 0xFF);
1966 /* msvcrt versions of strftime calls the invalid parameter handler
1967 * (aborting the process if one isn't set) if the parameters are out
1969 time
.tm_mon
= av_clip(time
.tm_mon
, 0, 11);
1970 time
.tm_mday
= av_clip(time
.tm_mday
, 1, 31);
1971 time
.tm_hour
= av_clip(time
.tm_hour
, 0, 23);
1972 time
.tm_min
= av_clip(time
.tm_min
, 0, 59);
1973 time
.tm_sec
= av_clip(time
.tm_sec
, 0, 59);
1975 *str
= av_mallocz(32);
1977 return AVERROR(ENOMEM
);
1978 if (!strftime(*str
, 32, "%Y-%m-%d %H:%M:%S", &time
))
1984 #define SET_STR_METADATA(pb, name, str) do { \
1985 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1987 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1990 #define SET_UID_METADATA(pb, name, var, str) do { \
1991 avio_read(pb, var, 16); \
1992 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1994 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1997 #define SET_TS_METADATA(pb, name, var, str) do { \
1998 var = avio_rb64(pb); \
1999 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2001 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2004 static int mxf_read_identification_metadata(void *arg
, AVIOContext
*pb
, int tag
, int size
, UID _uid
, int64_t klv_offset
)
2006 MXFContext
*mxf
= arg
;
2007 AVFormatContext
*s
= mxf
->fc
;
2014 SET_STR_METADATA(pb
, "company_name", str
);
2017 SET_STR_METADATA(pb
, "product_name", str
);
2020 SET_STR_METADATA(pb
, "product_version", str
);
2023 SET_UID_METADATA(pb
, "product_uid", uid
, str
);
2026 SET_TS_METADATA(pb
, "modification_date", ts
, str
);
2029 SET_STR_METADATA(pb
, "application_platform", str
);
2032 SET_UID_METADATA(pb
, "generation_uid", uid
, str
);
2035 SET_UID_METADATA(pb
, "uid", uid
, str
);
2041 static const MXFMetadataReadTableEntry mxf_metadata_read_table
[] = {
2042 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack
},
2043 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack
},
2044 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack
},
2045 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack
},
2046 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack
},
2047 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack
},
2048 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack
},
2049 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack
},
2050 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack
},
2051 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack
},
2052 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack
},
2053 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata
},
2054 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage
, 0, AnyType
},
2055 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package
, sizeof(MXFPackage
), SourcePackage
},
2056 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package
, sizeof(MXFPackage
), MaterialPackage
},
2057 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence
, sizeof(MXFSequence
), Sequence
},
2058 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group
, sizeof(MXFEssenceGroup
), EssenceGroup
},
2059 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip
, sizeof(MXFStructuralComponent
), SourceClip
},
2060 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), MultipleDescriptor
},
2061 { { 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 */
2062 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* CDCI */
2063 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* RGBA */
2064 { { 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 */
2065 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* Wave */
2066 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* AES3 */
2067 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* MPEG2VideoDescriptor */
2068 { { 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 */
2069 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor
, sizeof(MXFDescriptor
), Descriptor
}, /* MPEG2AudioDescriptor */
2070 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track
, sizeof(MXFTrack
), Track
}, /* Static Track */
2071 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track
, sizeof(MXFTrack
), Track
}, /* Generic Track */
2072 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component
, sizeof(MXFTimecodeComponent
), TimecodeComponent
},
2073 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component
, sizeof(MXFPulldownComponent
), PulldownComponent
},
2074 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context
, sizeof(MXFCryptoContext
), CryptoContext
},
2075 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment
, sizeof(MXFIndexTableSegment
), IndexTableSegment
},
2076 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL
, 0, AnyType
},
2079 static int mxf_metadataset_init(MXFMetadataSet
*ctx
, enum MXFMetadataSetType type
)
2082 case MultipleDescriptor
:
2084 ((MXFDescriptor
*)ctx
)->pix_fmt
= AV_PIX_FMT_NONE
;
2085 ((MXFDescriptor
*)ctx
)->duration
= AV_NOPTS_VALUE
;
2093 static int mxf_read_local_tags(MXFContext
*mxf
, KLVPacket
*klv
, MXFMetadataReadFunc
*read_child
, int ctx_size
, enum MXFMetadataSetType type
)
2095 AVIOContext
*pb
= mxf
->fc
->pb
;
2096 MXFMetadataSet
*ctx
= ctx_size
? av_mallocz(ctx_size
) : mxf
;
2097 uint64_t klv_end
= avio_tell(pb
) + klv
->length
;
2100 return AVERROR(ENOMEM
);
2101 mxf_metadataset_init(ctx
, type
);
2102 while (avio_tell(pb
) + 4 < klv_end
&& !avio_feof(pb
)) {
2104 int tag
= avio_rb16(pb
);
2105 int size
= avio_rb16(pb
); /* KLV specified by 0x53 */
2106 uint64_t next
= avio_tell(pb
) + size
;
2109 av_dlog(mxf
->fc
, "local tag %#04x size %d\n", tag
, size
);
2110 if (!size
) { /* ignore empty tag, needed for some files with empty UMID tag */
2111 av_log(mxf
->fc
, AV_LOG_ERROR
, "local tag %#04x with 0 size\n", tag
);
2114 if (tag
> 0x7FFF) { /* dynamic tag */
2116 for (i
= 0; i
< mxf
->local_tags_count
; i
++) {
2117 int local_tag
= AV_RB16(mxf
->local_tags
+i
*18);
2118 if (local_tag
== tag
) {
2119 memcpy(uid
, mxf
->local_tags
+i
*18+2, 16);
2120 av_dlog(mxf
->fc
, "local tag %#04x\n", local_tag
);
2121 PRINT_KEY(mxf
->fc
, "uid", uid
);
2125 if (ctx_size
&& tag
== 0x3C0A)
2126 avio_read(pb
, ctx
->uid
, 16);
2127 else if ((ret
= read_child(ctx
, pb
, tag
, size
, uid
, -1)) < 0)
2130 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2131 * it extending past the end of the KLV though (zzuf5.mxf). */
2132 if (avio_tell(pb
) > klv_end
) {
2136 av_log(mxf
->fc
, AV_LOG_ERROR
,
2137 "local tag %#04x extends past end of local set @ %#"PRIx64
"\n",
2139 return AVERROR_INVALIDDATA
;
2140 } else if (avio_tell(pb
) <= next
) /* only seek forward, else this can loop for a long time */
2141 avio_seek(pb
, next
, SEEK_SET
);
2143 if (ctx_size
) ctx
->type
= type
;
2144 return ctx_size
? mxf_add_metadata_set(mxf
, ctx
) : 0;
2148 * Matches any partition pack key, in other words:
2152 * @return non-zero if the key is a partition pack key, zero otherwise
2154 static int mxf_is_partition_pack_key(UID key
)
2156 //NOTE: this is a little lax since it doesn't constraint key[14]
2157 return !memcmp(key
, mxf_header_partition_pack_key
, 13) &&
2158 key
[13] >= 2 && key
[13] <= 4;
2162 * Parses a metadata KLV
2163 * @return <0 on error, 0 otherwise
2165 static int mxf_parse_klv(MXFContext
*mxf
, KLVPacket klv
, MXFMetadataReadFunc
*read
,
2166 int ctx_size
, enum MXFMetadataSetType type
)
2168 AVFormatContext
*s
= mxf
->fc
;
2170 if (klv
.key
[5] == 0x53) {
2171 res
= mxf_read_local_tags(mxf
, &klv
, read
, ctx_size
, type
);
2173 uint64_t next
= avio_tell(s
->pb
) + klv
.length
;
2174 res
= read(mxf
, s
->pb
, 0, klv
.length
, klv
.key
, klv
.offset
);
2176 /* only seek forward, else this can loop for a long time */
2177 if (avio_tell(s
->pb
) > next
) {
2178 av_log(s
, AV_LOG_ERROR
, "read past end of KLV @ %#"PRIx64
"\n",
2180 return AVERROR_INVALIDDATA
;
2183 avio_seek(s
->pb
, next
, SEEK_SET
);
2186 av_log(s
, AV_LOG_ERROR
, "error reading header metadata\n");
2193 * Seeks to the previous partition and parses it, if possible
2194 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2196 static int mxf_seek_to_previous_partition(MXFContext
*mxf
)
2198 AVIOContext
*pb
= mxf
->fc
->pb
;
2200 int64_t current_partition_ofs
;
2203 if (!mxf
->current_partition
||
2204 mxf
->run_in
+ mxf
->current_partition
->previous_partition
<= mxf
->last_forward_tell
)
2205 return 0; /* we've parsed all partitions */
2207 /* seek to previous partition */
2208 current_partition_ofs
= mxf
->current_partition
->pack_ofs
; //includes run-in
2209 avio_seek(pb
, mxf
->run_in
+ mxf
->current_partition
->previous_partition
, SEEK_SET
);
2210 mxf
->current_partition
= NULL
;
2212 av_dlog(mxf
->fc
, "seeking to previous partition\n");
2214 /* Make sure this is actually a PartitionPack, and if so parse it.
2217 if ((ret
= klv_read_packet(&klv
, pb
)) < 0) {
2218 av_log(mxf
->fc
, AV_LOG_ERROR
, "failed to read PartitionPack KLV\n");
2222 if (!mxf_is_partition_pack_key(klv
.key
)) {
2223 av_log(mxf
->fc
, AV_LOG_ERROR
, "PreviousPartition @ %" PRIx64
" isn't a PartitionPack\n", klv
.offset
);
2224 return AVERROR_INVALIDDATA
;
2227 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2228 * can point to just before the current partition, causing klv_read_packet()
2229 * to sync back up to it. See deadlock3.mxf
2231 if (klv
.offset
>= current_partition_ofs
) {
2232 av_log(mxf
->fc
, AV_LOG_ERROR
, "PreviousPartition for PartitionPack @ %"
2233 PRIx64
" indirectly points to itself\n", current_partition_ofs
);
2234 return AVERROR_INVALIDDATA
;
2237 if ((ret
= mxf_parse_klv(mxf
, klv
, mxf_read_partition_pack
, 0, 0)) < 0)
2244 * Called when essence is encountered
2245 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2247 static int mxf_parse_handle_essence(MXFContext
*mxf
)
2249 AVIOContext
*pb
= mxf
->fc
->pb
;
2252 if (mxf
->parsing_backward
) {
2253 return mxf_seek_to_previous_partition(mxf
);
2255 if (!mxf
->footer_partition
) {
2256 av_dlog(mxf
->fc
, "no FooterPartition\n");
2260 av_dlog(mxf
->fc
, "seeking to FooterPartition\n");
2262 /* remember where we were so we don't end up seeking further back than this */
2263 mxf
->last_forward_tell
= avio_tell(pb
);
2265 if (!pb
->seekable
) {
2266 av_log(mxf
->fc
, AV_LOG_INFO
, "file is not seekable - not parsing FooterPartition\n");
2270 /* seek to FooterPartition and parse backward */
2271 if ((ret
= avio_seek(pb
, mxf
->run_in
+ mxf
->footer_partition
, SEEK_SET
)) < 0) {
2272 av_log(mxf
->fc
, AV_LOG_ERROR
,
2273 "failed to seek to FooterPartition @ 0x%" PRIx64
2274 " (%"PRId64
") - partial file?\n",
2275 mxf
->run_in
+ mxf
->footer_partition
, ret
);
2279 mxf
->current_partition
= NULL
;
2280 mxf
->parsing_backward
= 1;
2287 * Called when the next partition or EOF is encountered
2288 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2290 static int mxf_parse_handle_partition_or_eof(MXFContext
*mxf
)
2292 return mxf
->parsing_backward
? mxf_seek_to_previous_partition(mxf
) : 1;
2296 * Figures out the proper offset and length of the essence container in each partition
2298 static void mxf_compute_essence_containers(MXFContext
*mxf
)
2302 /* everything is already correct */
2303 if (mxf
->op
== OPAtom
)
2306 for (x
= 0; x
< mxf
->partitions_count
; x
++) {
2307 MXFPartition
*p
= &mxf
->partitions
[x
];
2310 continue; /* BodySID == 0 -> no essence */
2312 if (x
>= mxf
->partitions_count
- 1)
2313 break; /* FooterPartition - can't compute length (and we don't need to) */
2315 /* essence container spans to the next partition */
2316 p
->essence_length
= mxf
->partitions
[x
+1].this_partition
- p
->essence_offset
;
2318 if (p
->essence_length
< 0) {
2319 /* next ThisPartition < essence_offset */
2320 p
->essence_length
= 0;
2321 av_log(mxf
->fc
, AV_LOG_ERROR
,
2322 "partition %i: bad ThisPartition = %"PRIX64
"\n",
2323 x
+1, mxf
->partitions
[x
+1].this_partition
);
2328 static int64_t round_to_kag(int64_t position
, int kag_size
)
2330 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2331 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2332 int64_t ret
= (position
/ kag_size
) * kag_size
;
2333 return ret
== position
? ret
: ret
+ kag_size
;
2336 static int is_pcm(enum AVCodecID codec_id
)
2338 /* we only care about "normal" PCM codecs until we get samples */
2339 return codec_id
>= AV_CODEC_ID_PCM_S16LE
&& codec_id
< AV_CODEC_ID_PCM_S24DAUD
;
2343 * Deal with the case where for some audio atoms EditUnitByteCount is
2344 * very small (2, 4..). In those cases we should read more than one
2345 * sample per call to mxf_read_packet().
2347 static void mxf_handle_small_eubc(AVFormatContext
*s
)
2349 MXFContext
*mxf
= s
->priv_data
;
2351 /* assuming non-OPAtom == frame wrapped
2352 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2353 if (mxf
->op
!= OPAtom
)
2356 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2357 if (s
->nb_streams
!= 1 ||
2358 s
->streams
[0]->codec
->codec_type
!= AVMEDIA_TYPE_AUDIO
||
2359 !is_pcm(s
->streams
[0]->codec
->codec_id
) ||
2360 mxf
->nb_index_tables
!= 1 ||
2361 mxf
->index_tables
[0].nb_segments
!= 1 ||
2362 mxf
->index_tables
[0].segments
[0]->edit_unit_byte_count
>= 32)
2365 /* arbitrarily default to 48 kHz PAL audio frame size */
2366 /* TODO: We could compute this from the ratio between the audio
2367 * and video edit rates for 48 kHz NTSC we could use the
2368 * 1802-1802-1802-1802-1801 pattern. */
2369 mxf
->edit_units_per_packet
= 1920;
2372 static void mxf_read_random_index_pack(AVFormatContext
*s
)
2374 MXFContext
*mxf
= s
->priv_data
;
2376 int64_t file_size
, max_rip_length
, min_rip_length
;
2379 if (!s
->pb
->seekable
)
2382 file_size
= avio_size(s
->pb
);
2384 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2385 * The limit below assumes a file with nothing but partition packs and a RIP.
2386 * Before changing this, consider that a muxer may place each sample in its own partition.
2388 * 105 is the size of the smallest possible PartitionPack
2389 * 12 is the size of each RIP entry
2390 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2392 max_rip_length
= ((file_size
- mxf
->run_in
) / 105) * 12 + 28;
2393 max_rip_length
= FFMIN(max_rip_length
, INT_MAX
); //2 GiB and up is also silly
2395 /* We're only interested in RIPs with at least two entries.. */
2396 min_rip_length
= 16+1+24+4;
2398 /* See S377m section 11 */
2399 avio_seek(s
->pb
, file_size
- 4, SEEK_SET
);
2400 length
= avio_rb32(s
->pb
);
2402 if (length
< min_rip_length
|| length
> max_rip_length
)
2404 avio_seek(s
->pb
, file_size
- length
, SEEK_SET
);
2405 if (klv_read_packet(&klv
, s
->pb
) < 0 ||
2406 !IS_KLV_KEY(klv
.key
, mxf_random_index_pack_key
) ||
2407 klv
.length
!= length
- 20)
2410 avio_skip(s
->pb
, klv
.length
- 12);
2411 mxf
->footer_partition
= avio_rb64(s
->pb
);
2414 if (mxf
->run_in
+ mxf
->footer_partition
>= file_size
) {
2415 av_log(s
, AV_LOG_WARNING
, "bad FooterPartition in RIP - ignoring\n");
2416 mxf
->footer_partition
= 0;
2420 avio_seek(s
->pb
, mxf
->run_in
, SEEK_SET
);
2423 static int mxf_read_header(AVFormatContext
*s
)
2425 MXFContext
*mxf
= s
->priv_data
;
2427 int64_t essence_offset
= 0;
2430 mxf
->last_forward_tell
= INT64_MAX
;
2431 mxf
->edit_units_per_packet
= 1;
2433 if (!mxf_read_sync(s
->pb
, mxf_header_partition_pack_key
, 14)) {
2434 av_log(s
, AV_LOG_ERROR
, "could not find header partition pack key\n");
2435 return AVERROR_INVALIDDATA
;
2437 avio_seek(s
->pb
, -14, SEEK_CUR
);
2439 mxf
->run_in
= avio_tell(s
->pb
);
2441 mxf_read_random_index_pack(s
);
2443 while (!avio_feof(s
->pb
)) {
2444 const MXFMetadataReadTableEntry
*metadata
;
2446 if (klv_read_packet(&klv
, s
->pb
) < 0) {
2447 /* EOF - seek to previous partition or stop */
2448 if(mxf_parse_handle_partition_or_eof(mxf
) <= 0)
2454 PRINT_KEY(s
, "read header", klv
.key
);
2455 av_dlog(s
, "size %"PRIu64
" offset %#"PRIx64
"\n", klv
.length
, klv
.offset
);
2456 if (IS_KLV_KEY(klv
.key
, mxf_encrypted_triplet_key
) ||
2457 IS_KLV_KEY(klv
.key
, mxf_essence_element_key
) ||
2458 IS_KLV_KEY(klv
.key
, mxf_avid_essence_element_key
) ||
2459 IS_KLV_KEY(klv
.key
, mxf_system_item_key
)) {
2461 if (!mxf
->current_partition
) {
2462 av_log(mxf
->fc
, AV_LOG_ERROR
, "found essence prior to first PartitionPack\n");
2463 return AVERROR_INVALIDDATA
;
2466 if (!mxf
->current_partition
->essence_offset
) {
2467 /* for OP1a we compute essence_offset
2468 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2469 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2470 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2472 int64_t op1a_essence_offset
=
2473 round_to_kag(mxf
->current_partition
->this_partition
+
2474 mxf
->current_partition
->pack_length
, mxf
->current_partition
->kag_size
) +
2475 round_to_kag(mxf
->current_partition
->header_byte_count
, mxf
->current_partition
->kag_size
) +
2476 round_to_kag(mxf
->current_partition
->index_byte_count
, mxf
->current_partition
->kag_size
);
2478 if (mxf
->op
== OPAtom
) {
2479 /* point essence_offset to the actual data
2480 * OPAtom has all the essence in one big KLV
2482 mxf
->current_partition
->essence_offset
= avio_tell(s
->pb
);
2483 mxf
->current_partition
->essence_length
= klv
.length
;
2485 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2486 mxf
->current_partition
->essence_offset
= op1a_essence_offset
;
2490 if (!essence_offset
)
2491 essence_offset
= klv
.offset
;
2493 /* seek to footer, previous partition or stop */
2494 if (mxf_parse_handle_essence(mxf
) <= 0)
2497 } else if (mxf_is_partition_pack_key(klv
.key
) && mxf
->current_partition
) {
2498 /* next partition pack - keep going, seek to previous partition or stop */
2499 if(mxf_parse_handle_partition_or_eof(mxf
) <= 0)
2501 else if (mxf
->parsing_backward
)
2503 /* we're still parsing forward. proceed to parsing this partition pack */
2506 for (metadata
= mxf_metadata_read_table
; metadata
->read
; metadata
++) {
2507 if (IS_KLV_KEY(klv
.key
, metadata
->key
)) {
2508 if ((ret
= mxf_parse_klv(mxf
, klv
, metadata
->read
, metadata
->ctx_size
, metadata
->type
)) < 0)
2512 av_log(s
, AV_LOG_VERBOSE
, "Dark key " PRIxUID
"\n",
2516 if (!metadata
->read
)
2517 avio_skip(s
->pb
, klv
.length
);
2519 /* FIXME avoid seek */
2520 if (!essence_offset
) {
2521 av_log(s
, AV_LOG_ERROR
, "no essence\n");
2522 return AVERROR_INVALIDDATA
;
2524 avio_seek(s
->pb
, essence_offset
, SEEK_SET
);
2526 mxf_compute_essence_containers(mxf
);
2528 /* we need to do this before computing the index tables
2529 * to be able to fill in zero IndexDurations with st->duration */
2530 if ((ret
= mxf_parse_structural_metadata(mxf
)) < 0)
2533 if ((ret
= mxf_compute_index_tables(mxf
)) < 0)
2536 if (mxf
->nb_index_tables
> 1) {
2537 /* TODO: look up which IndexSID to use via EssenceContainerData */
2538 av_log(mxf
->fc
, AV_LOG_INFO
, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2539 mxf
->nb_index_tables
, mxf
->index_tables
[0].index_sid
);
2540 } else if (mxf
->nb_index_tables
== 0 && mxf
->op
== OPAtom
) {
2541 av_log(mxf
->fc
, AV_LOG_ERROR
, "cannot demux OPAtom without an index\n");
2542 ret
= AVERROR_INVALIDDATA
;
2546 mxf_handle_small_eubc(s
);
2556 * Sets mxf->current_edit_unit based on what offset we're currently at.
2557 * @return next_ofs if OK, <0 on error
2559 static int64_t mxf_set_current_edit_unit(MXFContext
*mxf
, int64_t current_offset
)
2561 int64_t last_ofs
= -1, next_ofs
= -1;
2562 MXFIndexTable
*t
= &mxf
->index_tables
[0];
2564 /* this is called from the OP1a demuxing logic, which means there
2565 * may be no index tables */
2566 if (mxf
->nb_index_tables
<= 0)
2569 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2570 while (mxf
->current_edit_unit
>= 0) {
2571 if (mxf_edit_unit_absolute_offset(mxf
, t
, mxf
->current_edit_unit
+ 1, NULL
, &next_ofs
, 0) < 0)
2574 if (next_ofs
<= last_ofs
) {
2575 /* large next_ofs didn't change or current_edit_unit wrapped
2576 * around this fixes the infinite loop on zzuf3.mxf */
2577 av_log(mxf
->fc
, AV_LOG_ERROR
,
2578 "next_ofs didn't change. not deriving packet timestamps\n");
2582 if (next_ofs
> current_offset
)
2585 last_ofs
= next_ofs
;
2586 mxf
->current_edit_unit
++;
2589 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2590 if (mxf
->current_edit_unit
< 0)
2596 static int mxf_compute_sample_count(MXFContext
*mxf
, int stream_index
,
2597 uint64_t *sample_count
)
2599 int i
, total
= 0, size
= 0;
2600 AVStream
*st
= mxf
->fc
->streams
[stream_index
];
2601 MXFTrack
*track
= st
->priv_data
;
2602 AVRational time_base
= av_inv_q(track
->edit_rate
);
2603 AVRational sample_rate
= av_inv_q(st
->time_base
);
2604 const MXFSamplesPerFrame
*spf
= NULL
;
2606 if ((sample_rate
.num
/ sample_rate
.den
) == 48000)
2607 spf
= ff_mxf_get_samples_per_frame(mxf
->fc
, time_base
);
2609 int remainder
= (sample_rate
.num
* time_base
.num
) %
2610 (time_base
.den
* sample_rate
.den
);
2611 *sample_count
= av_q2d(av_mul_q((AVRational
){mxf
->current_edit_unit
, 1},
2612 av_mul_q(sample_rate
, time_base
)));
2614 av_log(mxf
->fc
, AV_LOG_WARNING
,
2615 "seeking detected on stream #%d with time base (%d/%d) and "
2616 "sample rate (%d/%d), audio pts won't be accurate.\n",
2617 stream_index
, time_base
.num
, time_base
.den
,
2618 sample_rate
.num
, sample_rate
.den
);
2622 while (spf
->samples_per_frame
[size
]) {
2623 total
+= spf
->samples_per_frame
[size
];
2629 *sample_count
= (mxf
->current_edit_unit
/ size
) * (uint64_t)total
;
2630 for (i
= 0; i
< mxf
->current_edit_unit
% size
; i
++) {
2631 *sample_count
+= spf
->samples_per_frame
[i
];
2637 static int mxf_set_audio_pts(MXFContext
*mxf
, AVCodecContext
*codec
,
2640 MXFTrack
*track
= mxf
->fc
->streams
[pkt
->stream_index
]->priv_data
;
2641 int64_t bits_per_sample
= codec
->bits_per_coded_sample
;
2643 if (!bits_per_sample
)
2644 bits_per_sample
= av_get_bits_per_sample(codec
->codec_id
);
2646 pkt
->pts
= track
->sample_count
;
2648 if ( codec
->channels
<= 0
2649 || bits_per_sample
<= 0
2650 || codec
->channels
* (int64_t)bits_per_sample
< 8)
2651 return AVERROR(EINVAL
);
2652 track
->sample_count
+= pkt
->size
/ (codec
->channels
* (int64_t)bits_per_sample
/ 8);
2656 static int mxf_read_packet_old(AVFormatContext
*s
, AVPacket
*pkt
)
2659 MXFContext
*mxf
= s
->priv_data
;
2662 while ((ret
= klv_read_packet(&klv
, s
->pb
)) == 0) {
2663 PRINT_KEY(s
, "read packet", klv
.key
);
2664 av_dlog(s
, "size %"PRIu64
" offset %#"PRIx64
"\n", klv
.length
, klv
.offset
);
2665 if (IS_KLV_KEY(klv
.key
, mxf_encrypted_triplet_key
)) {
2666 ret
= mxf_decrypt_triplet(s
, pkt
, &klv
);
2668 av_log(s
, AV_LOG_ERROR
, "invalid encoded triplet\n");
2673 if (IS_KLV_KEY(klv
.key
, mxf_essence_element_key
) ||
2674 IS_KLV_KEY(klv
.key
, mxf_avid_essence_element_key
)) {
2675 int index
= mxf_get_stream_index(s
, &klv
);
2676 int64_t next_ofs
, next_klv
;
2679 AVCodecContext
*codec
;
2682 av_log(s
, AV_LOG_ERROR
,
2683 "error getting stream index %"PRIu32
"\n",
2684 AV_RB32(klv
.key
+ 12));
2688 st
= s
->streams
[index
];
2689 track
= st
->priv_data
;
2691 if (s
->streams
[index
]->discard
== AVDISCARD_ALL
)
2694 next_klv
= avio_tell(s
->pb
) + klv
.length
;
2695 next_ofs
= mxf_set_current_edit_unit(mxf
, klv
.offset
);
2697 if (next_ofs
>= 0 && next_klv
> next_ofs
) {
2698 /* if this check is hit then it's possible OPAtom was treated as OP1a
2699 * truncate the packet since it's probably very large (>2 GiB is common) */
2700 avpriv_request_sample(s
,
2701 "OPAtom misinterpreted as OP1a?"
2702 "KLV for edit unit %i extending into "
2704 mxf
->current_edit_unit
);
2705 klv
.length
= next_ofs
- avio_tell(s
->pb
);
2708 /* check for 8 channels AES3 element */
2709 if (klv
.key
[12] == 0x06 && klv
.key
[13] == 0x01 && klv
.key
[14] == 0x10) {
2710 ret
= mxf_get_d10_aes3_packet(s
->pb
, s
->streams
[index
],
2713 av_log(s
, AV_LOG_ERROR
, "error reading D-10 aes3 frame\n");
2717 ret
= av_get_packet(s
->pb
, pkt
, klv
.length
);
2721 pkt
->stream_index
= index
;
2722 pkt
->pos
= klv
.offset
;
2726 if (codec
->codec_type
== AVMEDIA_TYPE_VIDEO
&& next_ofs
>= 0) {
2727 /* mxf->current_edit_unit good - see if we have an
2728 * index table to derive timestamps from */
2729 MXFIndexTable
*t
= &mxf
->index_tables
[0];
2731 if (mxf
->nb_index_tables
>= 1 && mxf
->current_edit_unit
< t
->nb_ptses
) {
2732 pkt
->dts
= mxf
->current_edit_unit
+ t
->first_dts
;
2733 pkt
->pts
= t
->ptses
[mxf
->current_edit_unit
];
2734 } else if (track
->intra_only
) {
2735 /* intra-only -> PTS = EditUnit.
2736 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2737 pkt
->pts
= mxf
->current_edit_unit
;
2739 } else if (codec
->codec_type
== AVMEDIA_TYPE_AUDIO
) {
2740 ret
= mxf_set_audio_pts(mxf
, codec
, pkt
);
2745 /* seek for truncated packets */
2746 avio_seek(s
->pb
, next_klv
, SEEK_SET
);
2751 avio_skip(s
->pb
, klv
.length
);
2753 return avio_feof(s
->pb
) ? AVERROR_EOF
: ret
;
2756 static int mxf_read_packet(AVFormatContext
*s
, AVPacket
*pkt
)
2758 MXFContext
*mxf
= s
->priv_data
;
2760 int64_t ret64
, pos
, next_pos
;
2765 if (mxf
->op
!= OPAtom
)
2766 return mxf_read_packet_old(s
, pkt
);
2768 /* OPAtom - clip wrapped demuxing */
2769 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2771 t
= &mxf
->index_tables
[0];
2773 if (mxf
->current_edit_unit
>= st
->duration
)
2776 edit_units
= FFMIN(mxf
->edit_units_per_packet
, st
->duration
- mxf
->current_edit_unit
);
2778 if ((ret
= mxf_edit_unit_absolute_offset(mxf
, t
, mxf
->current_edit_unit
, NULL
, &pos
, 1)) < 0)
2781 /* compute size by finding the next edit unit or the end of the essence container
2782 * not pretty, but it works */
2783 if ((ret
= mxf_edit_unit_absolute_offset(mxf
, t
, mxf
->current_edit_unit
+ edit_units
, NULL
, &next_pos
, 0)) < 0 &&
2784 (next_pos
= mxf_essence_container_end(mxf
, t
->body_sid
)) <= 0) {
2785 av_log(s
, AV_LOG_ERROR
, "unable to compute the size of the last packet\n");
2786 return AVERROR_INVALIDDATA
;
2789 if ((size
= next_pos
- pos
) <= 0) {
2790 av_log(s
, AV_LOG_ERROR
, "bad size: %i\n", size
);
2791 return AVERROR_INVALIDDATA
;
2794 if ((ret64
= avio_seek(s
->pb
, pos
, SEEK_SET
)) < 0)
2797 if ((size
= av_get_packet(s
->pb
, pkt
, size
)) < 0)
2800 pkt
->stream_index
= 0;
2802 if (st
->codec
->codec_type
== AVMEDIA_TYPE_VIDEO
&& t
->ptses
&&
2803 mxf
->current_edit_unit
>= 0 && mxf
->current_edit_unit
< t
->nb_ptses
) {
2804 pkt
->dts
= mxf
->current_edit_unit
+ t
->first_dts
;
2805 pkt
->pts
= t
->ptses
[mxf
->current_edit_unit
];
2806 } else if (st
->codec
->codec_type
== AVMEDIA_TYPE_AUDIO
) {
2807 int ret
= mxf_set_audio_pts(mxf
, st
->codec
, pkt
);
2812 mxf
->current_edit_unit
+= edit_units
;
2817 static int mxf_read_close(AVFormatContext
*s
)
2819 MXFContext
*mxf
= s
->priv_data
;
2820 MXFIndexTableSegment
*seg
;
2823 av_freep(&mxf
->packages_refs
);
2825 for (i
= 0; i
< s
->nb_streams
; i
++)
2826 s
->streams
[i
]->priv_data
= NULL
;
2828 for (i
= 0; i
< mxf
->metadata_sets_count
; i
++) {
2829 switch (mxf
->metadata_sets
[i
]->type
) {
2831 av_freep(&((MXFDescriptor
*)mxf
->metadata_sets
[i
])->extradata
);
2833 case MultipleDescriptor
:
2834 av_freep(&((MXFDescriptor
*)mxf
->metadata_sets
[i
])->sub_descriptors_refs
);
2837 av_freep(&((MXFSequence
*)mxf
->metadata_sets
[i
])->structural_components_refs
);
2840 av_freep(&((MXFEssenceGroup
*)mxf
->metadata_sets
[i
])->structural_components_refs
);
2843 case MaterialPackage
:
2844 av_freep(&((MXFPackage
*)mxf
->metadata_sets
[i
])->tracks_refs
);
2845 av_freep(&((MXFPackage
*)mxf
->metadata_sets
[i
])->name
);
2847 case IndexTableSegment
:
2848 seg
= (MXFIndexTableSegment
*)mxf
->metadata_sets
[i
];
2849 av_freep(&seg
->temporal_offset_entries
);
2850 av_freep(&seg
->flag_entries
);
2851 av_freep(&seg
->stream_offset_entries
);
2856 av_freep(&mxf
->metadata_sets
[i
]);
2858 av_freep(&mxf
->partitions
);
2859 av_freep(&mxf
->metadata_sets
);
2860 av_freep(&mxf
->aesc
);
2861 av_freep(&mxf
->local_tags
);
2863 if (mxf
->index_tables
) {
2864 for (i
= 0; i
< mxf
->nb_index_tables
; i
++) {
2865 av_freep(&mxf
->index_tables
[i
].segments
);
2866 av_freep(&mxf
->index_tables
[i
].ptses
);
2867 av_freep(&mxf
->index_tables
[i
].fake_index
);
2870 av_freep(&mxf
->index_tables
);
2875 static int mxf_probe(AVProbeData
*p
) {
2876 const uint8_t *bufp
= p
->buf
;
2877 const uint8_t *end
= p
->buf
+ p
->buf_size
;
2879 if (p
->buf_size
< sizeof(mxf_header_partition_pack_key
))
2882 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2883 end
-= sizeof(mxf_header_partition_pack_key
);
2885 for (; bufp
< end
;) {
2886 if (!((bufp
[13] - 1) & 0xF2)){
2887 if (AV_RN32(bufp
) == AV_RN32(mxf_header_partition_pack_key
) &&
2888 AV_RN32(bufp
+ 4) == AV_RN32(mxf_header_partition_pack_key
+ 4) &&
2889 AV_RN32(bufp
+ 8) == AV_RN32(mxf_header_partition_pack_key
+ 8) &&
2890 AV_RN16(bufp
+12) == AV_RN16(mxf_header_partition_pack_key
+12))
2891 return AVPROBE_SCORE_MAX
;
2900 /* rudimentary byte seek */
2901 /* XXX: use MXF Index */
2902 static int mxf_read_seek(AVFormatContext
*s
, int stream_index
, int64_t sample_time
, int flags
)
2904 AVStream
*st
= s
->streams
[stream_index
];
2906 MXFContext
* mxf
= s
->priv_data
;
2910 MXFTrack
*source_track
= st
->priv_data
;
2912 /* if audio then truncate sample_time to EditRate */
2913 if (st
->codec
->codec_type
== AVMEDIA_TYPE_AUDIO
)
2914 sample_time
= av_rescale_q(sample_time
, st
->time_base
,
2915 av_inv_q(source_track
->edit_rate
));
2917 if (mxf
->nb_index_tables
<= 0) {
2919 return AVERROR_INVALIDDATA
;
2920 if (sample_time
< 0)
2922 seconds
= av_rescale(sample_time
, st
->time_base
.num
, st
->time_base
.den
);
2924 seekpos
= avio_seek(s
->pb
, (s
->bit_rate
* seconds
) >> 3, SEEK_SET
);
2928 ff_update_cur_dts(s
, st
, sample_time
);
2929 mxf
->current_edit_unit
= sample_time
;
2931 t
= &mxf
->index_tables
[0];
2933 /* clamp above zero, else ff_index_search_timestamp() returns negative
2934 * this also means we allow seeking before the start */
2935 sample_time
= FFMAX(sample_time
, 0);
2937 if (t
->fake_index
) {
2938 /* behave as if we have a proper index */
2939 if ((sample_time
= ff_index_search_timestamp(t
->fake_index
, t
->nb_ptses
, sample_time
, flags
)) < 0)
2942 /* no IndexEntryArray (one or more CBR segments)
2943 * make sure we don't seek past the end */
2944 sample_time
= FFMIN(sample_time
, source_track
->original_duration
- 1);
2947 if ((ret
= mxf_edit_unit_absolute_offset(mxf
, t
, sample_time
, &sample_time
, &seekpos
, 1)) < 0)
2950 ff_update_cur_dts(s
, st
, sample_time
);
2951 mxf
->current_edit_unit
= sample_time
;
2952 avio_seek(s
->pb
, seekpos
, SEEK_SET
);
2955 // Update all tracks sample count
2956 for (i
= 0; i
< s
->nb_streams
; i
++) {
2957 AVStream
*cur_st
= s
->streams
[i
];
2958 MXFTrack
*cur_track
= cur_st
->priv_data
;
2959 uint64_t current_sample_count
= 0;
2960 if (cur_st
->codec
->codec_type
== AVMEDIA_TYPE_AUDIO
) {
2961 ret
= mxf_compute_sample_count(mxf
, i
, ¤t_sample_count
);
2965 cur_track
->sample_count
= current_sample_count
;
2971 AVInputFormat ff_mxf_demuxer
= {
2973 .long_name
= NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2974 .priv_data_size
= sizeof(MXFContext
),
2975 .read_probe
= mxf_probe
,
2976 .read_header
= mxf_read_header
,
2977 .read_packet
= mxf_read_packet
,
2978 .read_close
= mxf_read_close
,
2979 .read_seek
= mxf_read_seek
,