3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/timecode.h"
75 OPSONYOpt, /* FATE sample, violates the spec in places */
78 typedef struct MXFPartition {
81 MXFPartitionType type;
82 uint64_t previous_partition;
85 int64_t this_partition;
86 int64_t essence_offset; ///< absolute offset of essence
87 int64_t essence_length;
89 int64_t header_byte_count;
90 int64_t index_byte_count;
92 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
95 typedef struct MXFCryptoContext {
97 enum MXFMetadataSetType type;
98 UID source_container_ul;
101 typedef struct MXFStructuralComponent {
103 enum MXFMetadataSetType type;
104 UID source_package_uid;
105 UID data_definition_ul;
107 int64_t start_position;
109 } MXFStructuralComponent;
111 typedef struct MXFSequence {
113 enum MXFMetadataSetType type;
114 UID data_definition_ul;
115 UID *structural_components_refs;
116 int structural_components_count;
121 typedef struct MXFTrack {
123 enum MXFMetadataSetType type;
126 struct AVRational rate;
128 } MXFTimecodeComponent;
132 enum MXFMetadataSetType type;
133 UID input_segment_ref;
134 } MXFPulldownComponent;
138 enum MXFMetadataSetType type;
139 UID *structural_components_refs;
140 int structural_components_count;
146 enum MXFMetadataSetType type;
153 enum MXFMetadataSetType type;
154 MXFSequence *sequence; /* mandatory, and only one */
157 uint8_t track_number[4];
158 AVRational edit_rate;
160 uint64_t sample_count;
161 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
164 typedef struct MXFDescriptor {
166 enum MXFMetadataSetType type;
167 UID essence_container_ul;
168 UID essence_codec_ul;
170 AVRational sample_rate;
171 AVRational aspect_ratio;
173 int height; /* Field height, not frame height */
174 int frame_layout; /* See MXFFrameLayout enum */
180 int64_t duration; /* ContainerDuration optional property */
181 unsigned int component_depth;
182 unsigned int horiz_subsampling;
183 unsigned int vert_subsampling;
184 UID *sub_descriptors_refs;
185 int sub_descriptors_count;
189 enum AVPixelFormat pix_fmt;
192 typedef struct MXFIndexTableSegment {
194 enum MXFMetadataSetType type;
195 int edit_unit_byte_count;
198 AVRational index_edit_rate;
199 uint64_t index_start_position;
200 uint64_t index_duration;
201 int8_t *temporal_offset_entries;
203 uint64_t *stream_offset_entries;
204 int nb_index_entries;
205 } MXFIndexTableSegment;
207 typedef struct MXFPackage {
209 enum MXFMetadataSetType type;
214 MXFDescriptor *descriptor; /* only one */
221 typedef struct MXFMetadataSet {
223 enum MXFMetadataSetType type;
226 /* decoded index table */
227 typedef struct MXFIndexTable {
230 int nb_ptses; /* number of PTSes or total duration of index */
231 int64_t first_dts; /* DTS = EditUnit + first_dts */
232 int64_t *ptses; /* maps EditUnit -> PTS */
234 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
235 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
238 typedef struct MXFContext {
239 MXFPartition *partitions;
240 unsigned partitions_count;
244 MXFMetadataSet **metadata_sets;
245 int metadata_sets_count;
249 int local_tags_count;
250 uint64_t footer_partition;
251 KLVPacket current_klv_data;
252 int current_klv_index;
254 MXFPartition *current_partition;
255 int parsing_backward;
256 int64_t last_forward_tell;
257 int last_forward_partition;
258 int current_edit_unit;
260 MXFIndexTable *index_tables;
261 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
264 enum MXFWrappingScheme {
269 /* NOTE: klv_offset is not set (-1) for local keys */
270 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
272 typedef struct MXFMetadataReadTableEntry {
274 MXFMetadataReadFunc *read;
276 enum MXFMetadataSetType type;
277 } MXFMetadataReadTableEntry;
279 static int mxf_read_close(AVFormatContext *s);
281 /* partial keys to match */
282 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
283 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
284 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
285 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
286 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
287 /* complete keys to match */
288 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 };
289 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
290 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
291 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 };
292 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
293 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
294 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
295 static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
296 static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
298 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
300 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
302 MXFIndexTableSegment *seg;
303 switch ((*ctx)->type) {
305 av_freep(&((MXFDescriptor *)*ctx)->extradata);
307 case MultipleDescriptor:
308 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
311 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
314 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
317 case MaterialPackage:
318 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
319 av_freep(&((MXFPackage *)*ctx)->name);
320 av_freep(&((MXFPackage *)*ctx)->comment_refs);
323 av_freep(&((MXFTaggedValue *)*ctx)->name);
324 av_freep(&((MXFTaggedValue *)*ctx)->value);
326 case IndexTableSegment:
327 seg = (MXFIndexTableSegment *)*ctx;
328 av_freep(&seg->temporal_offset_entries);
329 av_freep(&seg->flag_entries);
330 av_freep(&seg->stream_offset_entries);
338 static int64_t klv_decode_ber_length(AVIOContext *pb)
340 uint64_t size = avio_r8(pb);
341 if (size & 0x80) { /* long form */
342 int bytes_num = size & 0x7f;
343 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
345 return AVERROR_INVALIDDATA;
348 size = size << 8 | avio_r8(pb);
353 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
356 for (i = 0; i < size && !avio_feof(pb); i++) {
360 else if (b != key[i])
366 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
368 if (!mxf_read_sync(pb, mxf_klv_key, 4))
369 return AVERROR_INVALIDDATA;
370 klv->offset = avio_tell(pb) - 4;
371 memcpy(klv->key, mxf_klv_key, 4);
372 avio_read(pb, klv->key + 4, 12);
373 klv->length = klv_decode_ber_length(pb);
374 return klv->length == -1 ? -1 : 0;
377 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
381 for (i = 0; i < s->nb_streams; i++) {
382 MXFTrack *track = s->streams[i]->priv_data;
384 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
387 /* return 0 if only one stream, for OP Atom files with 0 as track number */
388 return s->nb_streams == 1 ? 0 : -1;
391 /* XXX: use AVBitStreamFilter */
392 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
394 const uint8_t *buf_ptr, *end_ptr;
398 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
399 return AVERROR_INVALIDDATA;
400 length = av_get_packet(pb, pkt, length);
403 data_ptr = pkt->data;
404 end_ptr = pkt->data + length;
405 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
406 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
407 for (i = 0; i < st->codec->channels; i++) {
408 uint32_t sample = bytestream_get_le32(&buf_ptr);
409 if (st->codec->bits_per_coded_sample == 24)
410 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
412 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
414 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
416 av_shrink_packet(pkt, data_ptr - pkt->data);
420 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
422 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
423 MXFContext *mxf = s->priv_data;
424 AVIOContext *pb = s->pb;
425 int64_t end = avio_tell(pb) + klv->length;
428 uint64_t plaintext_size;
433 if (!mxf->aesc && s->key && s->keylen == 16) {
434 mxf->aesc = av_aes_alloc();
436 return AVERROR(ENOMEM);
437 av_aes_init(mxf->aesc, s->key, 128, 1);
440 avio_skip(pb, klv_decode_ber_length(pb));
442 klv_decode_ber_length(pb);
443 plaintext_size = avio_rb64(pb);
445 klv_decode_ber_length(pb);
446 avio_read(pb, klv->key, 16);
447 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
448 return AVERROR_INVALIDDATA;
449 index = mxf_get_stream_index(s, klv);
451 return AVERROR_INVALIDDATA;
453 klv_decode_ber_length(pb);
454 orig_size = avio_rb64(pb);
455 if (orig_size < plaintext_size)
456 return AVERROR_INVALIDDATA;
458 size = klv_decode_ber_length(pb);
459 if (size < 32 || size - 32 < orig_size)
460 return AVERROR_INVALIDDATA;
461 avio_read(pb, ivec, 16);
462 avio_read(pb, tmpbuf, 16);
464 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
465 if (memcmp(tmpbuf, checkv, 16))
466 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
468 size = av_get_packet(pb, pkt, size);
471 else if (size < plaintext_size)
472 return AVERROR_INVALIDDATA;
473 size -= plaintext_size;
475 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
476 &pkt->data[plaintext_size], size >> 4, ivec, 1);
477 av_shrink_packet(pkt, orig_size);
478 pkt->stream_index = index;
479 avio_skip(pb, end - avio_tell(pb));
483 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
485 MXFContext *mxf = arg;
486 int item_num = avio_rb32(pb);
487 int item_len = avio_rb32(pb);
489 if (item_len != 18) {
490 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
491 return AVERROR_PATCHWELCOME;
493 if (item_num > 65536) {
494 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
495 return AVERROR_INVALIDDATA;
498 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
499 av_free(mxf->local_tags);
500 mxf->local_tags_count = 0;
501 mxf->local_tags = av_calloc(item_num, item_len);
502 if (!mxf->local_tags)
503 return AVERROR(ENOMEM);
504 mxf->local_tags_count = item_num;
505 avio_read(pb, mxf->local_tags, item_num*item_len);
509 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
511 MXFContext *mxf = arg;
512 MXFPartition *partition, *tmp_part;
514 uint64_t footer_partition;
515 uint32_t nb_essence_containers;
517 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
519 return AVERROR(ENOMEM);
520 mxf->partitions = tmp_part;
522 if (mxf->parsing_backward) {
523 /* insert the new partition pack in the middle
524 * this makes the entries in mxf->partitions sorted by offset */
525 memmove(&mxf->partitions[mxf->last_forward_partition+1],
526 &mxf->partitions[mxf->last_forward_partition],
527 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
528 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
530 mxf->last_forward_partition++;
531 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
534 memset(partition, 0, sizeof(*partition));
535 mxf->partitions_count++;
536 partition->pack_length = avio_tell(pb) - klv_offset + size;
537 partition->pack_ofs = klv_offset;
541 partition->type = Header;
544 partition->type = BodyPartition;
547 partition->type = Footer;
550 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
551 return AVERROR_INVALIDDATA;
554 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
555 partition->closed = partition->type == Footer || !(uid[14] & 1);
556 partition->complete = uid[14] > 2;
558 partition->kag_size = avio_rb32(pb);
559 partition->this_partition = avio_rb64(pb);
560 partition->previous_partition = avio_rb64(pb);
561 footer_partition = avio_rb64(pb);
562 partition->header_byte_count = avio_rb64(pb);
563 partition->index_byte_count = avio_rb64(pb);
564 partition->index_sid = avio_rb32(pb);
566 partition->body_sid = avio_rb32(pb);
567 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
568 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
569 return AVERROR_INVALIDDATA;
571 nb_essence_containers = avio_rb32(pb);
573 if (partition->this_partition &&
574 partition->previous_partition == partition->this_partition) {
575 av_log(mxf->fc, AV_LOG_ERROR,
576 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
577 partition->previous_partition);
578 /* override with the actual previous partition offset */
579 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
581 mxf->partitions + mxf->last_forward_partition - 2;
582 partition->previous_partition = prev->this_partition;
584 /* if no previous body partition are found point to the header
586 if (partition->previous_partition == partition->this_partition)
587 partition->previous_partition = 0;
588 av_log(mxf->fc, AV_LOG_ERROR,
589 "Overriding PreviousPartition with %"PRIx64"\n",
590 partition->previous_partition);
593 /* some files don'thave FooterPartition set in every partition */
594 if (footer_partition) {
595 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
596 av_log(mxf->fc, AV_LOG_ERROR,
597 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
598 mxf->footer_partition, footer_partition);
600 mxf->footer_partition = footer_partition;
604 av_log(mxf->fc, AV_LOG_TRACE,
605 "PartitionPack: ThisPartition = 0x%"PRIX64
606 ", PreviousPartition = 0x%"PRIX64", "
607 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
608 partition->this_partition,
609 partition->previous_partition, footer_partition,
610 partition->index_sid, partition->body_sid);
612 /* sanity check PreviousPartition if set */
613 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
614 if (partition->previous_partition &&
615 mxf->run_in + partition->previous_partition >= klv_offset) {
616 av_log(mxf->fc, AV_LOG_ERROR,
617 "PreviousPartition points to this partition or forward\n");
618 return AVERROR_INVALIDDATA;
621 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
622 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
623 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
624 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
625 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
626 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
627 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
628 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
629 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
630 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
631 else if (op[12] == 0x10) {
632 /* SMPTE 390m: "There shall be exactly one essence container"
633 * The following block deals with files that violate this, namely:
634 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
635 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
636 if (nb_essence_containers != 1) {
637 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
641 av_log(mxf->fc, AV_LOG_WARNING,
642 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
643 nb_essence_containers,
644 op == OP1a ? "OP1a" : "OPAtom");
650 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
654 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
655 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
656 partition->kag_size);
658 if (mxf->op == OPSONYOpt)
659 partition->kag_size = 512;
661 partition->kag_size = 1;
663 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
669 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
671 MXFMetadataSet **tmp;
673 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
675 return AVERROR(ENOMEM);
676 mxf->metadata_sets = tmp;
677 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
678 mxf->metadata_sets_count++;
682 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
684 MXFCryptoContext *cryptocontext = arg;
686 return AVERROR_INVALIDDATA;
687 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
688 avio_read(pb, cryptocontext->source_container_ul, 16);
692 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
694 *count = avio_rb32(pb);
695 *refs = av_calloc(*count, sizeof(UID));
698 return AVERROR(ENOMEM);
700 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
701 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
705 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
707 MXFContext *mxf = arg;
710 if (mxf->packages_refs)
711 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
712 av_free(mxf->packages_refs);
713 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
718 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
720 MXFStructuralComponent *source_clip = arg;
723 source_clip->duration = avio_rb64(pb);
726 source_clip->start_position = avio_rb64(pb);
729 /* UMID, only get last 16 bytes */
731 avio_read(pb, source_clip->source_package_uid, 16);
734 source_clip->source_track_id = avio_rb32(pb);
740 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
742 MXFTimecodeComponent *mxf_timecode = arg;
745 mxf_timecode->start_frame = avio_rb64(pb);
748 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
751 mxf_timecode->drop_frame = avio_r8(pb);
757 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
759 MXFPulldownComponent *mxf_pulldown = arg;
762 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
768 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
770 MXFTrack *track = arg;
773 track->track_id = avio_rb32(pb);
776 avio_read(pb, track->track_number, 4);
779 track->edit_rate.num = avio_rb32(pb);
780 track->edit_rate.den = avio_rb32(pb);
783 avio_read(pb, track->sequence_ref, 16);
789 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
791 MXFSequence *sequence = arg;
794 sequence->duration = avio_rb64(pb);
797 avio_read(pb, sequence->data_definition_ul, 16);
800 sequence->origin = avio_r8(pb);
803 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
804 &sequence->structural_components_count);
809 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
811 MXFEssenceGroup *essence_group = arg;
814 essence_group->duration = avio_rb64(pb);
817 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
818 &essence_group->structural_components_count);
823 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
829 return AVERROR(EINVAL);
831 buf_size = size + size / 2 + 1;
832 *str = av_malloc(buf_size);
834 return AVERROR(ENOMEM);
837 ret = avio_get_str16be(pb, size, *str, buf_size);
839 ret = avio_get_str16le(pb, size, *str, buf_size);
849 #define READ_STR16(type, big_endian) \
850 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
852 return mxf_read_utf16_string(pb, size, str, big_endian); \
858 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
860 MXFPackage *package = arg;
863 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
864 &package->tracks_count);
867 avio_read(pb, package->package_ul, 16);
868 avio_read(pb, package->package_uid, 16);
871 avio_read(pb, package->descriptor_ref, 16);
874 return mxf_read_utf16be_string(pb, size, &package->name);
876 return mxf_read_strong_ref_array(pb, &package->comment_refs,
877 &package->comment_count);
882 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
886 segment->nb_index_entries = avio_rb32(pb);
888 length = avio_rb32(pb);
890 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
891 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
892 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
893 av_freep(&segment->temporal_offset_entries);
894 av_freep(&segment->flag_entries);
895 return AVERROR(ENOMEM);
898 for (i = 0; i < segment->nb_index_entries; i++) {
899 segment->temporal_offset_entries[i] = avio_r8(pb);
900 avio_r8(pb); /* KeyFrameOffset */
901 segment->flag_entries[i] = avio_r8(pb);
902 segment->stream_offset_entries[i] = avio_rb64(pb);
903 avio_skip(pb, length - 11);
908 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
910 MXFIndexTableSegment *segment = arg;
913 segment->edit_unit_byte_count = avio_rb32(pb);
914 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
917 segment->index_sid = avio_rb32(pb);
918 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
921 segment->body_sid = avio_rb32(pb);
922 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
925 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
926 return mxf_read_index_entry_array(pb, segment);
928 segment->index_edit_rate.num = avio_rb32(pb);
929 segment->index_edit_rate.den = avio_rb32(pb);
930 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
931 segment->index_edit_rate.den);
934 segment->index_start_position = avio_rb64(pb);
935 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
938 segment->index_duration = avio_rb64(pb);
939 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
945 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
947 int code, value, ofs = 0;
948 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
953 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
956 layout[ofs++] = code;
957 layout[ofs++] = value;
959 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
960 } while (code != 0); /* SMPTE 377M E.2.46 */
962 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
965 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
967 MXFDescriptor *descriptor = arg;
970 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
971 &descriptor->sub_descriptors_count);
972 case 0x3002: /* ContainerDuration */
973 descriptor->duration = avio_rb64(pb);
976 avio_read(pb, descriptor->essence_container_ul, 16);
979 avio_read(pb, descriptor->codec_ul, 16);
982 descriptor->linked_track_id = avio_rb32(pb);
984 case 0x3201: /* PictureEssenceCoding */
985 avio_read(pb, descriptor->essence_codec_ul, 16);
988 descriptor->width = avio_rb32(pb);
991 descriptor->height = avio_rb32(pb);
994 descriptor->frame_layout = avio_r8(pb);
997 descriptor->aspect_ratio.num = avio_rb32(pb);
998 descriptor->aspect_ratio.den = avio_rb32(pb);
1001 descriptor->field_dominance = avio_r8(pb);
1004 descriptor->component_depth = avio_rb32(pb);
1007 descriptor->horiz_subsampling = avio_rb32(pb);
1010 descriptor->vert_subsampling = avio_rb32(pb);
1013 descriptor->sample_rate.num = avio_rb32(pb);
1014 descriptor->sample_rate.den = avio_rb32(pb);
1016 case 0x3D06: /* SoundEssenceCompression */
1017 avio_read(pb, descriptor->essence_codec_ul, 16);
1020 descriptor->channels = avio_rb32(pb);
1023 descriptor->bits_per_sample = avio_rb32(pb);
1026 mxf_read_pixel_layout(pb, descriptor);
1029 /* Private uid used by SONY C0023S01.mxf */
1030 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1031 if (descriptor->extradata)
1032 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1033 av_free(descriptor->extradata);
1034 descriptor->extradata_size = 0;
1035 descriptor->extradata = av_malloc(size);
1036 if (!descriptor->extradata)
1037 return AVERROR(ENOMEM);
1038 descriptor->extradata_size = size;
1039 avio_read(pb, descriptor->extradata, size);
1041 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1042 uint32_t rsiz = avio_rb16(pb);
1043 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1044 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1045 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1052 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1054 MXFTaggedValue *tagged_value = arg;
1060 avio_read(pb, key, 17);
1061 /* TODO: handle other types of of indirect values */
1062 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1063 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1064 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1065 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1070 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1072 MXFTaggedValue *tagged_value = arg;
1075 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1077 return mxf_read_indirect_value(tagged_value, pb, size);
1083 * Match an uid independently of the version byte and up to len common bytes
1086 static int mxf_match_uid(const UID key, const UID uid, int len)
1089 for (i = 0; i < len; i++) {
1090 if (i != 7 && key[i] != uid[i])
1096 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1098 while (uls->uid[0]) {
1099 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1106 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1112 for (i = 0; i < mxf->metadata_sets_count; i++) {
1113 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1114 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1115 return mxf->metadata_sets[i];
1121 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1122 // video essence container uls
1123 { { 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 */
1124 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1125 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1126 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1127 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1130 /* EC ULs for intra-only formats */
1131 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1132 { { 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 */
1133 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1136 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1137 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1138 { { 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 */
1139 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1140 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1143 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1144 // sound essence container uls
1145 { { 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 */
1146 { { 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 */
1147 { { 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 */
1148 { { 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 */
1149 { { 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) */
1150 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1153 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1154 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1155 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1158 static const MXFCodecUL mxf_codec_uls[] = {
1159 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1160 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1163 static const char* const mxf_data_essence_descriptor[] = {
1164 "vbi_vanc_smpte_436M",
1167 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1169 int i, j, nb_segments = 0;
1170 MXFIndexTableSegment **unsorted_segments;
1171 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1173 /* count number of segments, allocate arrays and copy unsorted segments */
1174 for (i = 0; i < mxf->metadata_sets_count; i++)
1175 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1179 return AVERROR_INVALIDDATA;
1181 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1182 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1183 av_freep(sorted_segments);
1184 av_free(unsorted_segments);
1185 return AVERROR(ENOMEM);
1188 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1189 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1190 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1192 *nb_sorted_segments = 0;
1194 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1195 for (i = 0; i < nb_segments; i++) {
1196 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1197 uint64_t best_index_duration = 0;
1199 for (j = 0; j < nb_segments; j++) {
1200 MXFIndexTableSegment *s = unsorted_segments[j];
1202 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1203 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1204 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1206 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1207 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1208 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1210 best_body_sid = s->body_sid;
1211 best_index_sid = s->index_sid;
1212 best_index_start = s->index_start_position;
1213 best_index_duration = s->index_duration;
1217 /* no suitable entry found -> we're done */
1221 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1222 last_body_sid = best_body_sid;
1223 last_index_sid = best_index_sid;
1224 last_index_start = best_index_start;
1227 av_free(unsorted_segments);
1233 * Computes the absolute file offset of the given essence container offset
1235 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1238 int64_t offset_in = offset; /* for logging */
1240 for (x = 0; x < mxf->partitions_count; x++) {
1241 MXFPartition *p = &mxf->partitions[x];
1243 if (p->body_sid != body_sid)
1246 if (offset < p->essence_length || !p->essence_length) {
1247 *offset_out = p->essence_offset + offset;
1251 offset -= p->essence_length;
1254 av_log(mxf->fc, AV_LOG_ERROR,
1255 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1256 offset_in, body_sid);
1258 return AVERROR_INVALIDDATA;
1262 * Returns the end position of the essence container with given BodySID, or zero if unknown
1264 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1269 for (x = 0; x < mxf->partitions_count; x++) {
1270 MXFPartition *p = &mxf->partitions[x];
1272 if (p->body_sid != body_sid)
1275 if (!p->essence_length)
1278 ret = p->essence_offset + p->essence_length;
1284 /* EditUnit -> absolute offset */
1285 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
1288 int64_t offset_temp = 0;
1290 for (i = 0; i < index_table->nb_segments; i++) {
1291 MXFIndexTableSegment *s = index_table->segments[i];
1293 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1295 if (edit_unit < s->index_start_position + s->index_duration) {
1296 int64_t index = edit_unit - s->index_start_position;
1298 if (s->edit_unit_byte_count)
1299 offset_temp += s->edit_unit_byte_count * index;
1300 else if (s->nb_index_entries) {
1301 if (s->nb_index_entries == 2 * s->index_duration + 1)
1302 index *= 2; /* Avid index */
1304 if (index < 0 || index >= s->nb_index_entries) {
1305 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1306 index_table->index_sid, s->index_start_position);
1307 return AVERROR_INVALIDDATA;
1310 offset_temp = s->stream_offset_entries[index];
1312 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1313 index_table->index_sid, s->index_start_position);
1314 return AVERROR_INVALIDDATA;
1318 *edit_unit_out = edit_unit;
1320 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1322 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1323 offset_temp += s->edit_unit_byte_count * s->index_duration;
1328 av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid);
1330 return AVERROR_INVALIDDATA;
1333 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1336 int8_t max_temporal_offset = -128;
1338 /* first compute how many entries we have */
1339 for (i = 0; i < index_table->nb_segments; i++) {
1340 MXFIndexTableSegment *s = index_table->segments[i];
1342 if (!s->nb_index_entries) {
1343 index_table->nb_ptses = 0;
1344 return 0; /* no TemporalOffsets */
1347 index_table->nb_ptses += s->index_duration;
1350 /* paranoid check */
1351 if (index_table->nb_ptses <= 0)
1354 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1355 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1356 av_freep(&index_table->ptses);
1357 return AVERROR(ENOMEM);
1360 /* we may have a few bad TemporalOffsets
1361 * make sure the corresponding PTSes don't have the bogus value 0 */
1362 for (x = 0; x < index_table->nb_ptses; x++)
1363 index_table->ptses[x] = AV_NOPTS_VALUE;
1377 * We want to transform it into this:
1388 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1389 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1390 * The latter makes DTS <= PTS.
1392 for (i = x = 0; i < index_table->nb_segments; i++) {
1393 MXFIndexTableSegment *s = index_table->segments[i];
1394 int index_delta = 1;
1395 int n = s->nb_index_entries;
1397 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1398 index_delta = 2; /* Avid index */
1399 /* ignore the last entry - it's the size of the essence container */
1403 for (j = 0; j < n; j += index_delta, x++) {
1404 int offset = s->temporal_offset_entries[j] / index_delta;
1405 int index = x + offset;
1407 if (x >= index_table->nb_ptses) {
1408 av_log(mxf->fc, AV_LOG_ERROR,
1409 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1410 s->nb_index_entries, s->index_duration);
1414 index_table->fake_index[x].timestamp = x;
1415 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1417 if (index < 0 || index >= index_table->nb_ptses) {
1418 av_log(mxf->fc, AV_LOG_ERROR,
1419 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1424 index_table->ptses[index] = x;
1425 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1429 index_table->first_dts = -max_temporal_offset;
1435 * Sorts and collects index table segments into index tables.
1436 * Also computes PTSes if possible.
1438 static int mxf_compute_index_tables(MXFContext *mxf)
1440 int i, j, k, ret, nb_sorted_segments;
1441 MXFIndexTableSegment **sorted_segments = NULL;
1443 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1444 nb_sorted_segments <= 0) {
1445 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1449 /* sanity check and count unique BodySIDs/IndexSIDs */
1450 for (i = 0; i < nb_sorted_segments; i++) {
1451 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1452 mxf->nb_index_tables++;
1453 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1454 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1455 ret = AVERROR_INVALIDDATA;
1456 goto finish_decoding_index;
1460 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1461 sizeof(*mxf->index_tables));
1462 if (!mxf->index_tables) {
1463 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1464 ret = AVERROR(ENOMEM);
1465 goto finish_decoding_index;
1468 /* distribute sorted segments to index tables */
1469 for (i = j = 0; i < nb_sorted_segments; i++) {
1470 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1475 mxf->index_tables[j].nb_segments++;
1478 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1479 MXFIndexTable *t = &mxf->index_tables[j];
1481 t->segments = av_mallocz_array(t->nb_segments,
1482 sizeof(*t->segments));
1485 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1486 " pointer array\n");
1487 ret = AVERROR(ENOMEM);
1488 goto finish_decoding_index;
1491 if (sorted_segments[i]->index_start_position)
1492 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1493 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1495 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1496 t->index_sid = sorted_segments[i]->index_sid;
1497 t->body_sid = sorted_segments[i]->body_sid;
1499 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1500 goto finish_decoding_index;
1502 /* fix zero IndexDurations */
1503 for (k = 0; k < t->nb_segments; k++) {
1504 if (t->segments[k]->index_duration)
1507 if (t->nb_segments > 1)
1508 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1511 if (mxf->fc->nb_streams <= 0) {
1512 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1516 /* assume the first stream's duration is reasonable
1517 * leave index_duration = 0 on further segments in case we have any (unlikely)
1519 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1525 finish_decoding_index:
1526 av_free(sorted_segments);
1530 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1532 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1533 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1534 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1535 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1538 static int mxf_uid_to_str(UID uid, char **str)
1542 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1544 return AVERROR(ENOMEM);
1545 for (i = 0; i < sizeof(UID); i++) {
1546 snprintf(p, 2 + 1, "%.2x", uid[i]);
1548 if (i == 3 || i == 5 || i == 7 || i == 9) {
1549 snprintf(p, 1 + 1, "-");
1556 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1560 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1562 return AVERROR(ENOMEM);
1563 snprintf(p, 2 + 1, "0x");
1565 for (i = 0; i < sizeof(UID); i++) {
1566 snprintf(p, 2 + 1, "%.2X", ul[i]);
1570 for (i = 0; i < sizeof(UID); i++) {
1571 snprintf(p, 2 + 1, "%.2X", uid[i]);
1577 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1583 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1585 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1589 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1591 char buf[AV_TIMECODE_STR_SIZE];
1592 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1597 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1599 MXFStructuralComponent *component = NULL;
1600 MXFPulldownComponent *pulldown = NULL;
1602 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1606 switch (component->type) {
1607 case TimecodeComponent:
1608 return (MXFTimecodeComponent*)component;
1609 case PulldownComponent: /* timcode component may be located on a pulldown component */
1610 pulldown = (MXFPulldownComponent*)component;
1611 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1618 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1620 MXFPackage *package = NULL;
1623 for (i = 0; i < mxf->packages_count; i++) {
1624 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1628 if (!memcmp(package->package_uid, package_uid, 16))
1634 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1636 MXFDescriptor *sub_descriptor = NULL;
1642 if (descriptor->type == MultipleDescriptor) {
1643 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1644 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1646 if (!sub_descriptor) {
1647 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1650 if (sub_descriptor->linked_track_id == track_id) {
1651 return sub_descriptor;
1654 } else if (descriptor->type == Descriptor)
1660 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1662 MXFStructuralComponent *component = NULL;
1663 MXFPackage *package = NULL;
1664 MXFDescriptor *descriptor = NULL;
1667 if (!essence_group || !essence_group->structural_components_count)
1670 /* essence groups contains multiple representations of the same media,
1671 this return the first components with a valid Descriptor typically index 0 */
1672 for (i =0; i < essence_group->structural_components_count; i++){
1673 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1677 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1680 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1687 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1689 MXFStructuralComponent *component = NULL;
1691 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1694 switch (component->type) {
1698 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1705 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1707 MXFTaggedValue *tag;
1711 for (i = 0; i < package->comment_count; i++) {
1712 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1713 if (!tag || !tag->name || !tag->value)
1716 size = strlen(tag->name) + 8 + 1;
1717 key = av_mallocz(size);
1719 return AVERROR(ENOMEM);
1721 snprintf(key, size, "comment_%s", tag->name);
1722 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1727 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1729 MXFPackage *physical_package = NULL;
1730 MXFTrack *physical_track = NULL;
1731 MXFStructuralComponent *sourceclip = NULL;
1732 MXFTimecodeComponent *mxf_tc = NULL;
1736 int64_t start_position;
1738 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1739 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1743 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1746 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1748 /* the name of physical source package is name of the reel or tape */
1749 if (physical_package->name && physical_package->name[0])
1750 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1752 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1753 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1755 for (j = 0; j < physical_package->tracks_count; j++) {
1756 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1757 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1761 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1762 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1766 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1767 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1770 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1771 /* scale sourceclip start_position to match physical track edit rate */
1772 start_position = av_rescale_q(sourceclip->start_position,
1773 physical_track->edit_rate,
1774 source_track->edit_rate);
1776 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1777 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1787 static int mxf_parse_structural_metadata(MXFContext *mxf)
1789 MXFPackage *material_package = NULL;
1792 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1793 /* TODO: handle multiple material packages (OP3x) */
1794 for (i = 0; i < mxf->packages_count; i++) {
1795 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1796 if (material_package) break;
1798 if (!material_package) {
1799 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1800 return AVERROR_INVALIDDATA;
1803 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1804 if (material_package->name && material_package->name[0])
1805 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1806 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1808 for (i = 0; i < material_package->tracks_count; i++) {
1809 MXFPackage *source_package = NULL;
1810 MXFTrack *material_track = NULL;
1811 MXFTrack *source_track = NULL;
1812 MXFTrack *temp_track = NULL;
1813 MXFDescriptor *descriptor = NULL;
1814 MXFStructuralComponent *component = NULL;
1815 MXFTimecodeComponent *mxf_tc = NULL;
1816 UID *essence_container_ul = NULL;
1817 const MXFCodecUL *codec_ul = NULL;
1818 const MXFCodecUL *container_ul = NULL;
1819 const MXFCodecUL *pix_fmt_ul = NULL;
1824 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1825 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1829 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1830 mxf_tc = (MXFTimecodeComponent*)component;
1831 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1832 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1833 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1837 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1838 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1842 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1843 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1847 mxf_tc = (MXFTimecodeComponent*)component;
1848 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1849 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1850 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1855 /* TODO: handle multiple source clips */
1856 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1857 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1861 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1862 if (!source_package) {
1863 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1866 for (k = 0; k < source_package->tracks_count; k++) {
1867 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1868 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1869 ret = AVERROR_INVALIDDATA;
1872 if (temp_track->track_id == component->source_track_id) {
1873 source_track = temp_track;
1877 if (!source_track) {
1878 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1882 if (!source_track || !component)
1885 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1886 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1887 ret = AVERROR_INVALIDDATA;
1891 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1892 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1893 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1894 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1898 st = avformat_new_stream(mxf->fc, NULL);
1900 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1901 ret = AVERROR(ENOMEM);
1904 st->id = source_track->track_id;
1905 st->priv_data = source_track;
1907 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1908 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
1910 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
1911 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
1912 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
1913 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
1915 source_track->original_duration = st->duration = component->duration;
1917 if (st->duration == -1)
1918 st->duration = AV_NOPTS_VALUE;
1919 st->start_time = component->start_position;
1920 if (material_track->edit_rate.num <= 0 ||
1921 material_track->edit_rate.den <= 0) {
1922 av_log(mxf->fc, AV_LOG_WARNING,
1923 "Invalid edit rate (%d/%d) found on stream #%d, "
1924 "defaulting to 25/1\n",
1925 material_track->edit_rate.num,
1926 material_track->edit_rate.den, st->index);
1927 material_track->edit_rate = (AVRational){25, 1};
1929 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1931 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1932 * the former is accessible via st->priv_data */
1933 source_track->edit_rate = material_track->edit_rate;
1935 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1936 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1937 st->codec->codec_type = codec_ul->id;
1940 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1943 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1944 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1945 essence_container_ul = &descriptor->essence_container_ul;
1946 /* HACK: replacing the original key with mxf_encrypted_essence_container
1947 * is not allowed according to s429-6, try to find correct information anyway */
1948 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1949 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1950 for (k = 0; k < mxf->metadata_sets_count; k++) {
1951 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1952 if (metadata->type == CryptoContext) {
1953 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1959 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1960 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1961 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1962 if (st->codec->codec_id == AV_CODEC_ID_NONE) {
1963 codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->codec_ul);
1964 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1967 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1968 avcodec_get_name(st->codec->codec_id));
1969 for (k = 0; k < 16; k++) {
1970 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1971 descriptor->essence_codec_ul[k]);
1972 if (!(k+1 & 19) || k == 5)
1973 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1975 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1977 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
1978 if (source_package->name && source_package->name[0])
1979 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1981 mxf_parse_physical_source_package(mxf, source_track, st);
1983 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1984 source_track->intra_only = mxf_is_intra_only(descriptor);
1985 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1986 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1987 st->codec->codec_id = container_ul->id;
1988 st->codec->width = descriptor->width;
1989 st->codec->height = descriptor->height; /* Field height, not frame height */
1990 switch (descriptor->frame_layout) {
1991 case SegmentedFrame:
1992 /* This one is a weird layout I don't fully understand. */
1993 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1996 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1999 /* Every other line is stored and needs to be duplicated. */
2000 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2001 break; /* The correct thing to do here is fall through, but by breaking we might be
2002 able to decode some streams at half the vertical resolution, rather than not al all.
2003 It's also for compatibility with the old behavior. */
2006 case SeparateFields:
2007 switch (descriptor->field_dominance) {
2009 st->codec->field_order = AV_FIELD_TT;
2012 st->codec->field_order = AV_FIELD_BB;
2015 avpriv_request_sample(mxf->fc,
2016 "Field dominance %d support",
2017 descriptor->field_dominance);
2018 case 0: // we already have many samples with field_dominance == unknown
2021 /* Turn field height into frame height. */
2022 st->codec->height *= 2;
2025 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2027 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
2028 st->codec->pix_fmt = descriptor->pix_fmt;
2029 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2030 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2031 &descriptor->essence_codec_ul);
2032 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
2033 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
2034 /* support files created before RP224v10 by defaulting to UYVY422
2035 if subsampling is 4:2:2 and component depth is 8-bit */
2036 if (descriptor->horiz_subsampling == 2 &&
2037 descriptor->vert_subsampling == 1 &&
2038 descriptor->component_depth == 8) {
2039 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
2044 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2045 if (material_track->sequence->origin) {
2046 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2048 if (source_track->sequence->origin) {
2049 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2051 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2052 st->display_aspect_ratio = descriptor->aspect_ratio;
2053 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2054 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2055 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2056 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))
2057 st->codec->codec_id = (enum AVCodecID)container_ul->id;
2058 st->codec->channels = descriptor->channels;
2059 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
2061 if (descriptor->sample_rate.den > 0) {
2062 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2063 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2065 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2066 "found for stream #%d, time base forced to 1/48000\n",
2067 descriptor->sample_rate.num, descriptor->sample_rate.den,
2069 avpriv_set_pts_info(st, 64, 1, 48000);
2072 /* if duration is set, rescale it from EditRate to SampleRate */
2073 if (st->duration != AV_NOPTS_VALUE)
2074 st->duration = av_rescale_q(st->duration,
2075 av_inv_q(material_track->edit_rate),
2078 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2079 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
2080 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2081 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
2082 else if (descriptor->bits_per_sample == 32)
2083 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
2084 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
2085 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2086 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
2087 else if (descriptor->bits_per_sample == 32)
2088 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
2089 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
2090 st->need_parsing = AVSTREAM_PARSE_FULL;
2092 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
2093 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2094 essence_container_ul)->id;
2095 if (codec_id >= 0 &&
2096 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2097 av_dict_set(&st->metadata, "data_type",
2098 mxf_data_essence_descriptor[codec_id], 0);
2101 if (descriptor->extradata) {
2102 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
2103 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
2105 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
2106 ret = ff_generate_avci_extradata(st);
2110 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2111 /* TODO: decode timestamps */
2112 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2121 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
2123 struct tm time = { 0 };
2124 time.tm_year = (timestamp >> 48) - 1900;
2125 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2126 time.tm_mday = (timestamp >> 32 & 0xFF);
2127 time.tm_hour = (timestamp >> 24 & 0xFF);
2128 time.tm_min = (timestamp >> 16 & 0xFF);
2129 time.tm_sec = (timestamp >> 8 & 0xFF);
2131 /* msvcrt versions of strftime calls the invalid parameter handler
2132 * (aborting the process if one isn't set) if the parameters are out
2134 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2135 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2136 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2137 time.tm_min = av_clip(time.tm_min, 0, 59);
2138 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2140 *str = av_mallocz(32);
2142 return AVERROR(ENOMEM);
2143 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
2149 #define SET_STR_METADATA(pb, name, str) do { \
2150 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2152 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2155 #define SET_UID_METADATA(pb, name, var, str) do { \
2156 avio_read(pb, var, 16); \
2157 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2159 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2162 #define SET_TS_METADATA(pb, name, var, str) do { \
2163 var = avio_rb64(pb); \
2164 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2166 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2169 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2171 MXFContext *mxf = arg;
2172 AVFormatContext *s = mxf->fc;
2179 SET_STR_METADATA(pb, "company_name", str);
2182 SET_STR_METADATA(pb, "product_name", str);
2185 SET_STR_METADATA(pb, "product_version", str);
2188 SET_UID_METADATA(pb, "product_uid", uid, str);
2191 SET_TS_METADATA(pb, "modification_date", ts, str);
2194 SET_STR_METADATA(pb, "application_platform", str);
2197 SET_UID_METADATA(pb, "generation_uid", uid, str);
2200 SET_UID_METADATA(pb, "uid", uid, str);
2206 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2208 MXFContext *mxf = arg;
2209 AVFormatContext *s = mxf->fc;
2213 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2214 SET_STR_METADATA(pb, "project_name", str);
2219 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2220 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2221 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2222 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2223 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2224 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2225 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2226 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2227 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2228 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2229 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2230 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2231 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2232 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2233 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2234 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2235 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2236 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2237 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2238 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2239 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2240 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2241 { { 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 */
2242 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2243 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2244 { { 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 */
2245 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2246 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2247 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2248 { { 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 */
2249 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2250 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2251 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2252 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2253 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2254 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2255 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2256 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2259 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2262 case MultipleDescriptor:
2264 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2265 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2273 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2275 AVIOContext *pb = mxf->fc->pb;
2276 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2277 uint64_t klv_end = avio_tell(pb) + klv->length;
2280 return AVERROR(ENOMEM);
2281 mxf_metadataset_init(ctx, type);
2282 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2284 int tag = avio_rb16(pb);
2285 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2286 uint64_t next = avio_tell(pb) + size;
2289 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2290 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2291 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2294 if (tag > 0x7FFF) { /* dynamic tag */
2296 for (i = 0; i < mxf->local_tags_count; i++) {
2297 int local_tag = AV_RB16(mxf->local_tags+i*18);
2298 if (local_tag == tag) {
2299 memcpy(uid, mxf->local_tags+i*18+2, 16);
2300 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2301 PRINT_KEY(mxf->fc, "uid", uid);
2305 if (ctx_size && tag == 0x3C0A) {
2306 avio_read(pb, ctx->uid, 16);
2307 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2308 mxf_free_metadataset(&ctx, !!ctx_size);
2312 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2313 * it extending past the end of the KLV though (zzuf5.mxf). */
2314 if (avio_tell(pb) > klv_end) {
2317 mxf_free_metadataset(&ctx, !!ctx_size);
2320 av_log(mxf->fc, AV_LOG_ERROR,
2321 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2323 return AVERROR_INVALIDDATA;
2324 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2325 avio_seek(pb, next, SEEK_SET);
2327 if (ctx_size) ctx->type = type;
2328 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2332 * Matches any partition pack key, in other words:
2336 * @return non-zero if the key is a partition pack key, zero otherwise
2338 static int mxf_is_partition_pack_key(UID key)
2340 //NOTE: this is a little lax since it doesn't constraint key[14]
2341 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2342 key[13] >= 2 && key[13] <= 4;
2346 * Parses a metadata KLV
2347 * @return <0 on error, 0 otherwise
2349 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2350 int ctx_size, enum MXFMetadataSetType type)
2352 AVFormatContext *s = mxf->fc;
2354 if (klv.key[5] == 0x53) {
2355 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2357 uint64_t next = avio_tell(s->pb) + klv.length;
2358 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2360 /* only seek forward, else this can loop for a long time */
2361 if (avio_tell(s->pb) > next) {
2362 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2364 return AVERROR_INVALIDDATA;
2367 avio_seek(s->pb, next, SEEK_SET);
2370 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2377 * Seeks to the previous partition and parses it, if possible
2378 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2380 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2382 AVIOContext *pb = mxf->fc->pb;
2384 int64_t current_partition_ofs;
2387 if (!mxf->current_partition ||
2388 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2389 return 0; /* we've parsed all partitions */
2391 /* seek to previous partition */
2392 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2393 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2394 mxf->current_partition = NULL;
2396 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2398 /* Make sure this is actually a PartitionPack, and if so parse it.
2401 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2402 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2406 if (!mxf_is_partition_pack_key(klv.key)) {
2407 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2408 return AVERROR_INVALIDDATA;
2411 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2412 * can point to just before the current partition, causing klv_read_packet()
2413 * to sync back up to it. See deadlock3.mxf
2415 if (klv.offset >= current_partition_ofs) {
2416 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2417 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2418 return AVERROR_INVALIDDATA;
2421 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2428 * Called when essence is encountered
2429 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2431 static int mxf_parse_handle_essence(MXFContext *mxf)
2433 AVIOContext *pb = mxf->fc->pb;
2436 if (mxf->parsing_backward) {
2437 return mxf_seek_to_previous_partition(mxf);
2439 if (!mxf->footer_partition) {
2440 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2444 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2446 /* remember where we were so we don't end up seeking further back than this */
2447 mxf->last_forward_tell = avio_tell(pb);
2449 if (!pb->seekable) {
2450 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2454 /* seek to FooterPartition and parse backward */
2455 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2456 av_log(mxf->fc, AV_LOG_ERROR,
2457 "failed to seek to FooterPartition @ 0x%" PRIx64
2458 " (%"PRId64") - partial file?\n",
2459 mxf->run_in + mxf->footer_partition, ret);
2463 mxf->current_partition = NULL;
2464 mxf->parsing_backward = 1;
2471 * Called when the next partition or EOF is encountered
2472 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2474 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2476 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2480 * Figures out the proper offset and length of the essence container in each partition
2482 static void mxf_compute_essence_containers(MXFContext *mxf)
2486 /* everything is already correct */
2487 if (mxf->op == OPAtom)
2490 for (x = 0; x < mxf->partitions_count; x++) {
2491 MXFPartition *p = &mxf->partitions[x];
2494 continue; /* BodySID == 0 -> no essence */
2496 if (x >= mxf->partitions_count - 1)
2497 break; /* FooterPartition - can't compute length (and we don't need to) */
2499 /* essence container spans to the next partition */
2500 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2502 if (p->essence_length < 0) {
2503 /* next ThisPartition < essence_offset */
2504 p->essence_length = 0;
2505 av_log(mxf->fc, AV_LOG_ERROR,
2506 "partition %i: bad ThisPartition = %"PRIX64"\n",
2507 x+1, mxf->partitions[x+1].this_partition);
2512 static int64_t round_to_kag(int64_t position, int kag_size)
2514 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2515 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2516 int64_t ret = (position / kag_size) * kag_size;
2517 return ret == position ? ret : ret + kag_size;
2520 static int is_pcm(enum AVCodecID codec_id)
2522 /* we only care about "normal" PCM codecs until we get samples */
2523 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2527 * Deal with the case where for some audio atoms EditUnitByteCount is
2528 * very small (2, 4..). In those cases we should read more than one
2529 * sample per call to mxf_read_packet().
2531 static void mxf_handle_small_eubc(AVFormatContext *s)
2533 MXFContext *mxf = s->priv_data;
2535 /* assuming non-OPAtom == frame wrapped
2536 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2537 if (mxf->op != OPAtom)
2540 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2541 if (s->nb_streams != 1 ||
2542 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2543 !is_pcm(s->streams[0]->codec->codec_id) ||
2544 mxf->nb_index_tables != 1 ||
2545 mxf->index_tables[0].nb_segments != 1 ||
2546 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2549 /* arbitrarily default to 48 kHz PAL audio frame size */
2550 /* TODO: We could compute this from the ratio between the audio
2551 * and video edit rates for 48 kHz NTSC we could use the
2552 * 1802-1802-1802-1802-1801 pattern. */
2553 mxf->edit_units_per_packet = 1920;
2557 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2559 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2561 AVFormatContext *s = mxf->fc;
2562 AVStream *st = NULL;
2563 MXFIndexTableSegment *segment = NULL;
2564 MXFPartition *p = NULL;
2565 int essence_partition_count = 0;
2568 if (mxf->op != OPAtom)
2571 /* TODO: support raw video without a index if they exist */
2572 if (s->nb_streams != 1 || s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(s->streams[0]->codec->codec_id))
2575 /* check if file already has a IndexTableSegment */
2576 for (i = 0; i < mxf->metadata_sets_count; i++) {
2577 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2581 /* find the essence partition */
2582 for (i = 0; i < mxf->partitions_count; i++) {
2583 /* BodySID == 0 -> no essence */
2584 if (!mxf->partitions[i].body_sid)
2587 p = &mxf->partitions[i];
2588 essence_partition_count++;
2591 /* only handle files with a single essence partition */
2592 if (essence_partition_count != 1)
2595 if (!(segment = av_mallocz(sizeof(*segment))))
2596 return AVERROR(ENOMEM);
2598 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2599 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2604 segment->type = IndexTableSegment;
2605 /* stream will be treated as small EditUnitByteCount */
2606 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
2607 segment->index_start_position = 0;
2608 segment->index_duration = s->streams[0]->duration;
2609 segment->index_sid = p->index_sid;
2610 segment->body_sid = p->body_sid;
2614 static void mxf_read_random_index_pack(AVFormatContext *s)
2616 MXFContext *mxf = s->priv_data;
2618 int64_t file_size, max_rip_length, min_rip_length;
2621 if (!s->pb->seekable)
2624 file_size = avio_size(s->pb);
2626 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2627 * The limit below assumes a file with nothing but partition packs and a RIP.
2628 * Before changing this, consider that a muxer may place each sample in its own partition.
2630 * 105 is the size of the smallest possible PartitionPack
2631 * 12 is the size of each RIP entry
2632 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2634 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2635 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2637 /* We're only interested in RIPs with at least two entries.. */
2638 min_rip_length = 16+1+24+4;
2640 /* See S377m section 11 */
2641 avio_seek(s->pb, file_size - 4, SEEK_SET);
2642 length = avio_rb32(s->pb);
2644 if (length < min_rip_length || length > max_rip_length)
2646 avio_seek(s->pb, file_size - length, SEEK_SET);
2647 if (klv_read_packet(&klv, s->pb) < 0 ||
2648 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2649 klv.length != length - 20)
2652 avio_skip(s->pb, klv.length - 12);
2653 mxf->footer_partition = avio_rb64(s->pb);
2656 if (mxf->run_in + mxf->footer_partition >= file_size) {
2657 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2658 mxf->footer_partition = 0;
2662 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2665 static int mxf_read_header(AVFormatContext *s)
2667 MXFContext *mxf = s->priv_data;
2669 int64_t essence_offset = 0;
2672 mxf->last_forward_tell = INT64_MAX;
2673 mxf->edit_units_per_packet = 1;
2675 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2676 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2677 return AVERROR_INVALIDDATA;
2679 avio_seek(s->pb, -14, SEEK_CUR);
2681 mxf->run_in = avio_tell(s->pb);
2683 mxf_read_random_index_pack(s);
2685 while (!avio_feof(s->pb)) {
2686 const MXFMetadataReadTableEntry *metadata;
2688 if (klv_read_packet(&klv, s->pb) < 0) {
2689 /* EOF - seek to previous partition or stop */
2690 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2696 PRINT_KEY(s, "read header", klv.key);
2697 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2698 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2699 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2700 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2701 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2703 if (!mxf->current_partition) {
2704 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2705 return AVERROR_INVALIDDATA;
2708 if (!mxf->current_partition->essence_offset) {
2709 /* for OP1a we compute essence_offset
2710 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2711 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2712 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2714 int64_t op1a_essence_offset =
2715 round_to_kag(mxf->current_partition->this_partition +
2716 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2717 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2718 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2720 if (mxf->op == OPAtom) {
2721 /* point essence_offset to the actual data
2722 * OPAtom has all the essence in one big KLV
2724 mxf->current_partition->essence_offset = avio_tell(s->pb);
2725 mxf->current_partition->essence_length = klv.length;
2727 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2728 mxf->current_partition->essence_offset = op1a_essence_offset;
2732 if (!essence_offset)
2733 essence_offset = klv.offset;
2735 /* seek to footer, previous partition or stop */
2736 if (mxf_parse_handle_essence(mxf) <= 0)
2739 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2740 /* next partition pack - keep going, seek to previous partition or stop */
2741 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2743 else if (mxf->parsing_backward)
2745 /* we're still parsing forward. proceed to parsing this partition pack */
2748 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2749 if (IS_KLV_KEY(klv.key, metadata->key)) {
2750 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2754 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2758 if (!metadata->read)
2759 avio_skip(s->pb, klv.length);
2761 /* FIXME avoid seek */
2762 if (!essence_offset) {
2763 av_log(s, AV_LOG_ERROR, "no essence\n");
2764 ret = AVERROR_INVALIDDATA;
2767 avio_seek(s->pb, essence_offset, SEEK_SET);
2769 mxf_compute_essence_containers(mxf);
2771 /* we need to do this before computing the index tables
2772 * to be able to fill in zero IndexDurations with st->duration */
2773 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2776 mxf_handle_missing_index_segment(mxf);
2777 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2780 if (mxf->nb_index_tables > 1) {
2781 /* TODO: look up which IndexSID to use via EssenceContainerData */
2782 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2783 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2784 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2785 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2786 ret = AVERROR_INVALIDDATA;
2790 mxf_handle_small_eubc(s);
2800 * Sets mxf->current_edit_unit based on what offset we're currently at.
2801 * @return next_ofs if OK, <0 on error
2803 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2805 int64_t last_ofs = -1, next_ofs = -1;
2806 MXFIndexTable *t = &mxf->index_tables[0];
2808 /* this is called from the OP1a demuxing logic, which means there
2809 * may be no index tables */
2810 if (mxf->nb_index_tables <= 0)
2813 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2814 while (mxf->current_edit_unit >= 0) {
2815 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2818 if (next_ofs <= last_ofs) {
2819 /* large next_ofs didn't change or current_edit_unit wrapped
2820 * around this fixes the infinite loop on zzuf3.mxf */
2821 av_log(mxf->fc, AV_LOG_ERROR,
2822 "next_ofs didn't change. not deriving packet timestamps\n");
2826 if (next_ofs > current_offset)
2829 last_ofs = next_ofs;
2830 mxf->current_edit_unit++;
2833 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2834 if (mxf->current_edit_unit < 0)
2840 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2841 uint64_t *sample_count)
2843 int i, total = 0, size = 0;
2844 AVStream *st = mxf->fc->streams[stream_index];
2845 MXFTrack *track = st->priv_data;
2846 AVRational time_base = av_inv_q(track->edit_rate);
2847 AVRational sample_rate = av_inv_q(st->time_base);
2848 const MXFSamplesPerFrame *spf = NULL;
2850 if ((sample_rate.num / sample_rate.den) == 48000)
2851 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2853 int remainder = (sample_rate.num * time_base.num) %
2854 (time_base.den * sample_rate.den);
2855 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2856 av_mul_q(sample_rate, time_base)));
2858 av_log(mxf->fc, AV_LOG_WARNING,
2859 "seeking detected on stream #%d with time base (%d/%d) and "
2860 "sample rate (%d/%d), audio pts won't be accurate.\n",
2861 stream_index, time_base.num, time_base.den,
2862 sample_rate.num, sample_rate.den);
2866 while (spf->samples_per_frame[size]) {
2867 total += spf->samples_per_frame[size];
2873 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2874 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2875 *sample_count += spf->samples_per_frame[i];
2881 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2884 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2885 int64_t bits_per_sample = codec->bits_per_coded_sample;
2887 if (!bits_per_sample)
2888 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2890 pkt->pts = track->sample_count;
2892 if ( codec->channels <= 0
2893 || bits_per_sample <= 0
2894 || codec->channels * (int64_t)bits_per_sample < 8)
2895 return AVERROR(EINVAL);
2896 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2900 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2903 MXFContext *mxf = s->priv_data;
2906 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2907 PRINT_KEY(s, "read packet", klv.key);
2908 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2909 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2910 ret = mxf_decrypt_triplet(s, pkt, &klv);
2912 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2917 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2918 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2919 int index = mxf_get_stream_index(s, &klv);
2920 int64_t next_ofs, next_klv;
2923 AVCodecContext *codec;
2926 av_log(s, AV_LOG_ERROR,
2927 "error getting stream index %"PRIu32"\n",
2928 AV_RB32(klv.key + 12));
2932 st = s->streams[index];
2933 track = st->priv_data;
2935 if (s->streams[index]->discard == AVDISCARD_ALL)
2938 next_klv = avio_tell(s->pb) + klv.length;
2939 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2941 if (next_ofs >= 0 && next_klv > next_ofs) {
2942 /* if this check is hit then it's possible OPAtom was treated as OP1a
2943 * truncate the packet since it's probably very large (>2 GiB is common) */
2944 avpriv_request_sample(s,
2945 "OPAtom misinterpreted as OP1a?"
2946 "KLV for edit unit %i extending into "
2948 mxf->current_edit_unit);
2949 klv.length = next_ofs - avio_tell(s->pb);
2952 /* check for 8 channels AES3 element */
2953 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2954 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2957 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2961 ret = av_get_packet(s->pb, pkt, klv.length);
2965 pkt->stream_index = index;
2966 pkt->pos = klv.offset;
2970 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2971 /* mxf->current_edit_unit good - see if we have an
2972 * index table to derive timestamps from */
2973 MXFIndexTable *t = &mxf->index_tables[0];
2975 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2976 pkt->dts = mxf->current_edit_unit + t->first_dts;
2977 pkt->pts = t->ptses[mxf->current_edit_unit];
2978 } else if (track->intra_only) {
2979 /* intra-only -> PTS = EditUnit.
2980 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2981 pkt->pts = mxf->current_edit_unit;
2983 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2984 ret = mxf_set_audio_pts(mxf, codec, pkt);
2989 /* seek for truncated packets */
2990 avio_seek(s->pb, next_klv, SEEK_SET);
2995 avio_skip(s->pb, klv.length);
2997 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3000 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3002 MXFContext *mxf = s->priv_data;
3004 int64_t ret64, pos, next_pos;
3009 if (mxf->op != OPAtom)
3010 return mxf_read_packet_old(s, pkt);
3012 // If we have no streams then we basically are at EOF
3013 if (s->nb_streams < 1)
3016 /* OPAtom - clip wrapped demuxing */
3017 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3019 t = &mxf->index_tables[0];
3021 if (mxf->current_edit_unit >= st->duration)
3024 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3026 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3029 /* compute size by finding the next edit unit or the end of the essence container
3030 * not pretty, but it works */
3031 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3032 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3033 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3034 return AVERROR_INVALIDDATA;
3037 if ((size = next_pos - pos) <= 0) {
3038 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3039 return AVERROR_INVALIDDATA;
3042 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3045 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3048 pkt->stream_index = 0;
3050 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
3051 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
3052 pkt->dts = mxf->current_edit_unit + t->first_dts;
3053 pkt->pts = t->ptses[mxf->current_edit_unit];
3054 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3055 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
3060 mxf->current_edit_unit += edit_units;
3065 static int mxf_read_close(AVFormatContext *s)
3067 MXFContext *mxf = s->priv_data;
3070 av_freep(&mxf->packages_refs);
3072 for (i = 0; i < s->nb_streams; i++)
3073 s->streams[i]->priv_data = NULL;
3075 for (i = 0; i < mxf->metadata_sets_count; i++) {
3076 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3078 av_freep(&mxf->partitions);
3079 av_freep(&mxf->metadata_sets);
3080 av_freep(&mxf->aesc);
3081 av_freep(&mxf->local_tags);
3083 if (mxf->index_tables) {
3084 for (i = 0; i < mxf->nb_index_tables; i++) {
3085 av_freep(&mxf->index_tables[i].segments);
3086 av_freep(&mxf->index_tables[i].ptses);
3087 av_freep(&mxf->index_tables[i].fake_index);
3090 av_freep(&mxf->index_tables);
3095 static int mxf_probe(AVProbeData *p) {
3096 const uint8_t *bufp = p->buf;
3097 const uint8_t *end = p->buf + p->buf_size;
3099 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3102 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3103 end -= sizeof(mxf_header_partition_pack_key);
3105 for (; bufp < end;) {
3106 if (!((bufp[13] - 1) & 0xF2)){
3107 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3108 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3109 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3110 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3111 return AVPROBE_SCORE_MAX;
3120 /* rudimentary byte seek */
3121 /* XXX: use MXF Index */
3122 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3124 AVStream *st = s->streams[stream_index];
3126 MXFContext* mxf = s->priv_data;
3130 MXFTrack *source_track = st->priv_data;
3132 /* if audio then truncate sample_time to EditRate */
3133 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
3134 sample_time = av_rescale_q(sample_time, st->time_base,
3135 av_inv_q(source_track->edit_rate));
3137 if (mxf->nb_index_tables <= 0) {
3139 return AVERROR_INVALIDDATA;
3140 if (sample_time < 0)
3142 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3144 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3148 ff_update_cur_dts(s, st, sample_time);
3149 mxf->current_edit_unit = sample_time;
3151 t = &mxf->index_tables[0];
3153 /* clamp above zero, else ff_index_search_timestamp() returns negative
3154 * this also means we allow seeking before the start */
3155 sample_time = FFMAX(sample_time, 0);
3157 if (t->fake_index) {
3158 /* behave as if we have a proper index */
3159 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3162 /* no IndexEntryArray (one or more CBR segments)
3163 * make sure we don't seek past the end */
3164 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3167 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3170 ff_update_cur_dts(s, st, sample_time);
3171 mxf->current_edit_unit = sample_time;
3172 avio_seek(s->pb, seekpos, SEEK_SET);
3175 // Update all tracks sample count
3176 for (i = 0; i < s->nb_streams; i++) {
3177 AVStream *cur_st = s->streams[i];
3178 MXFTrack *cur_track = cur_st->priv_data;
3179 uint64_t current_sample_count = 0;
3180 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
3181 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3185 cur_track->sample_count = current_sample_count;
3191 AVInputFormat ff_mxf_demuxer = {
3193 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3194 .priv_data_size = sizeof(MXFContext),
3195 .read_probe = mxf_probe,
3196 .read_header = mxf_read_header,
3197 .read_packet = mxf_read_packet,
3198 .read_close = mxf_read_close,
3199 .read_seek = mxf_read_seek,