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
46 #include "libavutil/aes.h"
47 #include "libavutil/avassert.h"
48 #include "libavutil/mathematics.h"
49 #include "libavcodec/bytestream.h"
50 #include "libavutil/intreadwrite.h"
51 #include "libavutil/timecode.h"
73 OPSONYOpt, /* FATE sample, violates the spec in places */
79 MXFPartitionType type;
80 uint64_t previous_partition;
83 int64_t this_partition;
84 int64_t essence_offset; ///< absolute offset of essence
85 int64_t essence_length;
87 int64_t header_byte_count;
88 int64_t index_byte_count;
94 enum MXFMetadataSetType type;
95 UID source_container_ul;
100 enum MXFMetadataSetType type;
101 UID source_package_uid;
102 UID data_definition_ul;
104 int64_t start_position;
106 } MXFStructuralComponent;
110 enum MXFMetadataSetType type;
111 UID data_definition_ul;
112 UID *structural_components_refs;
113 int structural_components_count;
119 enum MXFMetadataSetType type;
122 struct AVRational rate;
124 } MXFTimecodeComponent;
128 enum MXFMetadataSetType type;
129 MXFSequence *sequence; /* mandatory, and only one */
132 uint8_t track_number[4];
133 AVRational edit_rate;
135 uint64_t sample_count;
136 int64_t original_duration; ///< duration before multiplying st->duration by SampleRate/EditRate
141 enum MXFMetadataSetType type;
142 UID essence_container_ul;
143 UID essence_codec_ul;
144 AVRational sample_rate;
145 AVRational aspect_ratio;
147 int height; /* Field height, not frame height */
148 int frame_layout; /* See MXFFrameLayout enum */
152 unsigned int component_depth;
153 unsigned int horiz_subsampling;
154 unsigned int vert_subsampling;
155 UID *sub_descriptors_refs;
156 int sub_descriptors_count;
160 enum AVPixelFormat pix_fmt;
165 enum MXFMetadataSetType type;
166 int edit_unit_byte_count;
169 AVRational index_edit_rate;
170 uint64_t index_start_position;
171 uint64_t index_duration;
172 int8_t *temporal_offset_entries;
174 uint64_t *stream_offset_entries;
175 int nb_index_entries;
176 } MXFIndexTableSegment;
180 enum MXFMetadataSetType type;
184 MXFDescriptor *descriptor; /* only one */
190 enum MXFMetadataSetType type;
193 /* decoded index table */
197 int nb_ptses; /* number of PTSes or total duration of index */
198 int64_t first_dts; /* DTS = EditUnit + first_dts */
199 int64_t *ptses; /* maps EditUnit -> PTS */
201 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
202 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
206 MXFPartition *partitions;
207 unsigned partitions_count;
211 MXFMetadataSet **metadata_sets;
212 int metadata_sets_count;
216 int local_tags_count;
217 uint64_t last_partition;
218 uint64_t footer_partition;
219 KLVPacket current_klv_data;
220 int current_klv_index;
222 MXFPartition *current_partition;
223 int parsing_backward;
224 int64_t last_forward_tell;
225 int last_forward_partition;
226 int current_edit_unit;
228 MXFIndexTable *index_tables;
229 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
232 enum MXFWrappingScheme {
237 /* NOTE: klv_offset is not set (-1) for local keys */
238 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
242 MXFMetadataReadFunc *read;
244 enum MXFMetadataSetType type;
245 } MXFMetadataReadTableEntry;
247 static int mxf_read_close(AVFormatContext *s);
249 /* partial keys to match */
250 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
251 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
252 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
253 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
254 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
255 /* complete keys to match */
256 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 };
257 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
258 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
259 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 };
260 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
262 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
264 static int64_t klv_decode_ber_length(AVIOContext *pb)
266 uint64_t size = avio_r8(pb);
267 if (size & 0x80) { /* long form */
268 int bytes_num = size & 0x7f;
269 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
271 return AVERROR_INVALIDDATA;
274 size = size << 8 | avio_r8(pb);
279 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
282 for (i = 0; i < size && !url_feof(pb); i++) {
286 else if (b != key[i])
292 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
294 if (!mxf_read_sync(pb, mxf_klv_key, 4))
295 return AVERROR_INVALIDDATA;
296 klv->offset = avio_tell(pb) - 4;
297 memcpy(klv->key, mxf_klv_key, 4);
298 avio_read(pb, klv->key + 4, 12);
299 klv->length = klv_decode_ber_length(pb);
300 return klv->length == -1 ? -1 : 0;
303 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
307 for (i = 0; i < s->nb_streams; i++) {
308 MXFTrack *track = s->streams[i]->priv_data;
310 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
313 /* return 0 if only one stream, for OP Atom files with 0 as track number */
314 return s->nb_streams == 1 ? 0 : -1;
317 /* XXX: use AVBitStreamFilter */
318 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
320 const uint8_t *buf_ptr, *end_ptr;
324 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
325 return AVERROR_INVALIDDATA;
326 length = av_get_packet(pb, pkt, length);
329 data_ptr = pkt->data;
330 end_ptr = pkt->data + length;
331 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
332 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
333 for (i = 0; i < st->codec->channels; i++) {
334 uint32_t sample = bytestream_get_le32(&buf_ptr);
335 if (st->codec->bits_per_coded_sample == 24)
336 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
338 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
340 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
342 av_shrink_packet(pkt, data_ptr - pkt->data);
346 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
348 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
349 MXFContext *mxf = s->priv_data;
350 AVIOContext *pb = s->pb;
351 int64_t end = avio_tell(pb) + klv->length;
354 uint64_t plaintext_size;
359 if (!mxf->aesc && s->key && s->keylen == 16) {
360 mxf->aesc = av_aes_alloc();
362 return AVERROR(ENOMEM);
363 av_aes_init(mxf->aesc, s->key, 128, 1);
366 avio_skip(pb, klv_decode_ber_length(pb));
368 klv_decode_ber_length(pb);
369 plaintext_size = avio_rb64(pb);
371 klv_decode_ber_length(pb);
372 avio_read(pb, klv->key, 16);
373 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
374 return AVERROR_INVALIDDATA;
375 index = mxf_get_stream_index(s, klv);
377 return AVERROR_INVALIDDATA;
379 klv_decode_ber_length(pb);
380 orig_size = avio_rb64(pb);
381 if (orig_size < plaintext_size)
382 return AVERROR_INVALIDDATA;
384 size = klv_decode_ber_length(pb);
385 if (size < 32 || size - 32 < orig_size)
386 return AVERROR_INVALIDDATA;
387 avio_read(pb, ivec, 16);
388 avio_read(pb, tmpbuf, 16);
390 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
391 if (memcmp(tmpbuf, checkv, 16))
392 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
394 size = av_get_packet(pb, pkt, size);
397 else if (size < plaintext_size)
398 return AVERROR_INVALIDDATA;
399 size -= plaintext_size;
401 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
402 &pkt->data[plaintext_size], size >> 4, ivec, 1);
403 av_shrink_packet(pkt, orig_size);
404 pkt->stream_index = index;
405 avio_skip(pb, end - avio_tell(pb));
409 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
411 MXFContext *mxf = arg;
412 int item_num = avio_rb32(pb);
413 int item_len = avio_rb32(pb);
415 if (item_len != 18) {
416 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
417 return AVERROR_PATCHWELCOME;
419 if (item_num > 65536) {
420 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
421 return AVERROR_INVALIDDATA;
423 mxf->local_tags = av_calloc(item_num, item_len);
424 if (!mxf->local_tags)
425 return AVERROR(ENOMEM);
426 mxf->local_tags_count = item_num;
427 avio_read(pb, mxf->local_tags, item_num*item_len);
431 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
433 MXFContext *mxf = arg;
434 MXFPartition *partition, *tmp_part;
436 uint64_t footer_partition;
437 uint32_t nb_essence_containers;
439 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
441 return AVERROR(ENOMEM);
442 mxf->partitions = tmp_part;
444 if (mxf->parsing_backward) {
445 /* insert the new partition pack in the middle
446 * this makes the entries in mxf->partitions sorted by offset */
447 memmove(&mxf->partitions[mxf->last_forward_partition+1],
448 &mxf->partitions[mxf->last_forward_partition],
449 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
450 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
452 mxf->last_forward_partition++;
453 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
456 memset(partition, 0, sizeof(*partition));
457 mxf->partitions_count++;
458 partition->pack_length = avio_tell(pb) - klv_offset + size;
462 partition->type = Header;
465 partition->type = BodyPartition;
468 partition->type = Footer;
471 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
472 return AVERROR_INVALIDDATA;
475 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
476 partition->closed = partition->type == Footer || !(uid[14] & 1);
477 partition->complete = uid[14] > 2;
479 partition->kag_size = avio_rb32(pb);
480 partition->this_partition = avio_rb64(pb);
481 partition->previous_partition = avio_rb64(pb);
482 footer_partition = avio_rb64(pb);
483 partition->header_byte_count = avio_rb64(pb);
484 partition->index_byte_count = avio_rb64(pb);
485 partition->index_sid = avio_rb32(pb);
487 partition->body_sid = avio_rb32(pb);
488 avio_read(pb, op, sizeof(UID));
489 nb_essence_containers = avio_rb32(pb);
491 /* some files don'thave FooterPartition set in every partition */
492 if (footer_partition) {
493 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
494 av_log(mxf->fc, AV_LOG_ERROR,
495 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
496 mxf->footer_partition, footer_partition);
498 mxf->footer_partition = footer_partition;
503 "PartitionPack: ThisPartition = 0x%"PRIX64
504 ", PreviousPartition = 0x%"PRIX64", "
505 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
506 partition->this_partition,
507 partition->previous_partition, footer_partition,
508 partition->index_sid, partition->body_sid);
510 /* sanity check PreviousPartition if set */
511 if (partition->previous_partition &&
512 mxf->run_in + partition->previous_partition >= klv_offset) {
513 av_log(mxf->fc, AV_LOG_ERROR,
514 "PreviousPartition points to this partition or forward\n");
515 return AVERROR_INVALIDDATA;
518 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
519 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
520 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
521 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
522 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
523 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
524 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
525 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
526 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
527 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
528 else if (op[12] == 0x10) {
529 /* SMPTE 390m: "There shall be exactly one essence container"
530 * The following block deals with files that violate this, namely:
531 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
532 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
533 if (nb_essence_containers != 1) {
534 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
538 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
539 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
545 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
549 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
550 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
552 if (mxf->op == OPSONYOpt)
553 partition->kag_size = 512;
555 partition->kag_size = 1;
557 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
563 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
565 MXFMetadataSet **tmp;
567 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
569 return AVERROR(ENOMEM);
570 mxf->metadata_sets = tmp;
571 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
572 mxf->metadata_sets_count++;
576 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
578 MXFCryptoContext *cryptocontext = arg;
580 return AVERROR_INVALIDDATA;
581 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
582 avio_read(pb, cryptocontext->source_container_ul, 16);
586 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
588 MXFContext *mxf = arg;
591 mxf->packages_count = avio_rb32(pb);
592 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
593 if (!mxf->packages_refs)
594 return AVERROR(ENOMEM);
595 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
596 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
602 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
604 MXFStructuralComponent *source_clip = arg;
607 source_clip->duration = avio_rb64(pb);
610 source_clip->start_position = avio_rb64(pb);
613 /* UMID, only get last 16 bytes */
615 avio_read(pb, source_clip->source_package_uid, 16);
618 source_clip->source_track_id = avio_rb32(pb);
624 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
626 MXFPackage *package = arg;
629 package->tracks_count = avio_rb32(pb);
630 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
631 if (!package->tracks_refs)
632 return AVERROR(ENOMEM);
633 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
634 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
640 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
642 MXFTimecodeComponent *mxf_timecode = arg;
645 mxf_timecode->start_frame = avio_rb64(pb);
648 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
651 mxf_timecode->drop_frame = avio_r8(pb);
657 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
659 MXFTrack *track = arg;
662 track->track_id = avio_rb32(pb);
665 avio_read(pb, track->track_number, 4);
668 track->edit_rate.num = avio_rb32(pb);
669 track->edit_rate.den = avio_rb32(pb);
672 avio_read(pb, track->sequence_ref, 16);
678 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
680 MXFSequence *sequence = arg;
683 sequence->duration = avio_rb64(pb);
686 avio_read(pb, sequence->data_definition_ul, 16);
689 sequence->structural_components_count = avio_rb32(pb);
690 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
691 if (!sequence->structural_components_refs)
692 return AVERROR(ENOMEM);
693 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
694 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
700 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
702 MXFPackage *package = arg;
705 package->tracks_count = avio_rb32(pb);
706 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
707 if (!package->tracks_refs)
708 return AVERROR(ENOMEM);
709 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
710 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
713 /* UMID, only get last 16 bytes */
715 avio_read(pb, package->package_uid, 16);
718 avio_read(pb, package->descriptor_ref, 16);
724 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
728 segment->nb_index_entries = avio_rb32(pb);
730 length = avio_rb32(pb);
732 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
733 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
734 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
735 return AVERROR(ENOMEM);
737 for (i = 0; i < segment->nb_index_entries; i++) {
738 segment->temporal_offset_entries[i] = avio_r8(pb);
739 avio_r8(pb); /* KeyFrameOffset */
740 segment->flag_entries[i] = avio_r8(pb);
741 segment->stream_offset_entries[i] = avio_rb64(pb);
742 avio_skip(pb, length - 11);
747 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
749 MXFIndexTableSegment *segment = arg;
752 segment->edit_unit_byte_count = avio_rb32(pb);
753 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
756 segment->index_sid = avio_rb32(pb);
757 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
760 segment->body_sid = avio_rb32(pb);
761 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
764 av_dlog(NULL, "IndexEntryArray found\n");
765 return mxf_read_index_entry_array(pb, segment);
767 segment->index_edit_rate.num = avio_rb32(pb);
768 segment->index_edit_rate.den = avio_rb32(pb);
769 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
770 segment->index_edit_rate.den);
773 segment->index_start_position = avio_rb64(pb);
774 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
777 segment->index_duration = avio_rb64(pb);
778 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
784 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
786 int code, value, ofs = 0;
787 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
792 av_dlog(NULL, "pixel layout: code %#x\n", code);
795 layout[ofs++] = code;
796 layout[ofs++] = value;
798 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
799 } while (code != 0); /* SMPTE 377M E.2.46 */
801 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
804 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
806 MXFDescriptor *descriptor = arg;
807 descriptor->pix_fmt = AV_PIX_FMT_NONE;
810 descriptor->sub_descriptors_count = avio_rb32(pb);
811 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
812 if (!descriptor->sub_descriptors_refs)
813 return AVERROR(ENOMEM);
814 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
815 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
818 avio_read(pb, descriptor->essence_container_ul, 16);
821 descriptor->linked_track_id = avio_rb32(pb);
823 case 0x3201: /* PictureEssenceCoding */
824 avio_read(pb, descriptor->essence_codec_ul, 16);
827 descriptor->width = avio_rb32(pb);
830 descriptor->height = avio_rb32(pb);
833 descriptor->frame_layout = avio_r8(pb);
836 descriptor->aspect_ratio.num = avio_rb32(pb);
837 descriptor->aspect_ratio.den = avio_rb32(pb);
840 descriptor->field_dominance = avio_r8(pb);
843 descriptor->component_depth = avio_rb32(pb);
846 descriptor->horiz_subsampling = avio_rb32(pb);
849 descriptor->vert_subsampling = avio_rb32(pb);
852 descriptor->sample_rate.num = avio_rb32(pb);
853 descriptor->sample_rate.den = avio_rb32(pb);
855 case 0x3D06: /* SoundEssenceCompression */
856 avio_read(pb, descriptor->essence_codec_ul, 16);
859 descriptor->channels = avio_rb32(pb);
862 descriptor->bits_per_sample = avio_rb32(pb);
865 mxf_read_pixel_layout(pb, descriptor);
868 /* Private uid used by SONY C0023S01.mxf */
869 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
870 if (descriptor->extradata)
871 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
872 av_free(descriptor->extradata);
873 descriptor->extradata_size = 0;
874 descriptor->extradata = av_malloc(size);
875 if (!descriptor->extradata)
876 return AVERROR(ENOMEM);
877 descriptor->extradata_size = size;
878 avio_read(pb, descriptor->extradata, size);
886 * Match an uid independently of the version byte and up to len common bytes
889 static int mxf_match_uid(const UID key, const UID uid, int len)
892 for (i = 0; i < len; i++) {
893 if (i != 7 && key[i] != uid[i])
899 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
901 while (uls->uid[0]) {
902 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
909 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
915 for (i = 0; i < mxf->metadata_sets_count; i++) {
916 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
917 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
918 return mxf->metadata_sets[i];
924 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
925 // video essence container uls
926 { { 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 */
927 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
928 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
929 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
932 /* EC ULs for intra-only formats */
933 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
934 { { 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 */
935 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
938 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
939 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
940 { { 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 */
941 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
942 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
945 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
946 // sound essence container uls
947 { { 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 */
948 { { 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 */
949 { { 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 */
950 { { 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 */
951 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
954 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
956 int i, j, nb_segments = 0;
957 MXFIndexTableSegment **unsorted_segments;
958 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
960 /* count number of segments, allocate arrays and copy unsorted segments */
961 for (i = 0; i < mxf->metadata_sets_count; i++)
962 if (mxf->metadata_sets[i]->type == IndexTableSegment)
966 return AVERROR_INVALIDDATA;
968 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
969 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
970 av_freep(sorted_segments);
971 av_free(unsorted_segments);
972 return AVERROR(ENOMEM);
975 for (i = j = 0; i < mxf->metadata_sets_count; i++)
976 if (mxf->metadata_sets[i]->type == IndexTableSegment)
977 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
979 *nb_sorted_segments = 0;
981 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
982 for (i = 0; i < nb_segments; i++) {
983 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
984 uint64_t best_index_duration = 0;
986 for (j = 0; j < nb_segments; j++) {
987 MXFIndexTableSegment *s = unsorted_segments[j];
989 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
990 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
991 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
993 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
994 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
995 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
997 best_body_sid = s->body_sid;
998 best_index_sid = s->index_sid;
999 best_index_start = s->index_start_position;
1000 best_index_duration = s->index_duration;
1004 /* no suitable entry found -> we're done */
1008 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1009 last_body_sid = best_body_sid;
1010 last_index_sid = best_index_sid;
1011 last_index_start = best_index_start;
1014 av_free(unsorted_segments);
1020 * Computes the absolute file offset of the given essence container offset
1022 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1025 int64_t offset_in = offset; /* for logging */
1027 for (x = 0; x < mxf->partitions_count; x++) {
1028 MXFPartition *p = &mxf->partitions[x];
1030 if (p->body_sid != body_sid)
1033 if (offset < p->essence_length || !p->essence_length) {
1034 *offset_out = p->essence_offset + offset;
1038 offset -= p->essence_length;
1041 av_log(mxf->fc, AV_LOG_ERROR,
1042 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1043 offset_in, body_sid);
1045 return AVERROR_INVALIDDATA;
1049 * Returns the end position of the essence container with given BodySID, or zero if unknown
1051 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1056 for (x = 0; x < mxf->partitions_count; x++) {
1057 MXFPartition *p = &mxf->partitions[x];
1059 if (p->body_sid != body_sid)
1062 if (!p->essence_length)
1065 ret = p->essence_offset + p->essence_length;
1071 /* EditUnit -> absolute offset */
1072 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)
1075 int64_t offset_temp = 0;
1077 for (i = 0; i < index_table->nb_segments; i++) {
1078 MXFIndexTableSegment *s = index_table->segments[i];
1080 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1082 if (edit_unit < s->index_start_position + s->index_duration) {
1083 int64_t index = edit_unit - s->index_start_position;
1085 if (s->edit_unit_byte_count)
1086 offset_temp += s->edit_unit_byte_count * index;
1087 else if (s->nb_index_entries) {
1088 if (s->nb_index_entries == 2 * s->index_duration + 1)
1089 index *= 2; /* Avid index */
1091 if (index < 0 || index >= s->nb_index_entries) {
1092 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1093 index_table->index_sid, s->index_start_position);
1094 return AVERROR_INVALIDDATA;
1097 offset_temp = s->stream_offset_entries[index];
1099 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1100 index_table->index_sid, s->index_start_position);
1101 return AVERROR_INVALIDDATA;
1105 *edit_unit_out = edit_unit;
1107 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1109 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1110 offset_temp += s->edit_unit_byte_count * s->index_duration;
1115 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);
1117 return AVERROR_INVALIDDATA;
1120 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1123 int8_t max_temporal_offset = -128;
1125 /* first compute how many entries we have */
1126 for (i = 0; i < index_table->nb_segments; i++) {
1127 MXFIndexTableSegment *s = index_table->segments[i];
1129 if (!s->nb_index_entries) {
1130 index_table->nb_ptses = 0;
1131 return 0; /* no TemporalOffsets */
1134 index_table->nb_ptses += s->index_duration;
1137 /* paranoid check */
1138 if (index_table->nb_ptses <= 0)
1141 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1142 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1143 av_freep(&index_table->ptses);
1144 return AVERROR(ENOMEM);
1147 /* we may have a few bad TemporalOffsets
1148 * make sure the corresponding PTSes don't have the bogus value 0 */
1149 for (x = 0; x < index_table->nb_ptses; x++)
1150 index_table->ptses[x] = AV_NOPTS_VALUE;
1164 * We want to transform it into this:
1175 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1176 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1177 * The latter makes DTS <= PTS.
1179 for (i = x = 0; i < index_table->nb_segments; i++) {
1180 MXFIndexTableSegment *s = index_table->segments[i];
1181 int index_delta = 1;
1182 int n = s->nb_index_entries;
1184 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1185 index_delta = 2; /* Avid index */
1186 /* ignore the last entry - it's the size of the essence container */
1190 for (j = 0; j < n; j += index_delta, x++) {
1191 int offset = s->temporal_offset_entries[j] / index_delta;
1192 int index = x + offset;
1194 if (x >= index_table->nb_ptses) {
1195 av_log(mxf->fc, AV_LOG_ERROR,
1196 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1197 s->nb_index_entries, s->index_duration);
1201 index_table->fake_index[x].timestamp = x;
1202 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1204 if (index < 0 || index >= index_table->nb_ptses) {
1205 av_log(mxf->fc, AV_LOG_ERROR,
1206 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1211 index_table->ptses[index] = x;
1212 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1216 index_table->first_dts = -max_temporal_offset;
1222 * Sorts and collects index table segments into index tables.
1223 * Also computes PTSes if possible.
1225 static int mxf_compute_index_tables(MXFContext *mxf)
1227 int i, j, k, ret, nb_sorted_segments;
1228 MXFIndexTableSegment **sorted_segments = NULL;
1230 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1231 nb_sorted_segments <= 0) {
1232 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1236 /* sanity check and count unique BodySIDs/IndexSIDs */
1237 for (i = 0; i < nb_sorted_segments; i++) {
1238 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1239 mxf->nb_index_tables++;
1240 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1241 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1242 ret = AVERROR_INVALIDDATA;
1243 goto finish_decoding_index;
1247 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1248 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1249 ret = AVERROR(ENOMEM);
1250 goto finish_decoding_index;
1253 /* distribute sorted segments to index tables */
1254 for (i = j = 0; i < nb_sorted_segments; i++) {
1255 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1260 mxf->index_tables[j].nb_segments++;
1263 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1264 MXFIndexTable *t = &mxf->index_tables[j];
1266 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1267 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1268 ret = AVERROR(ENOMEM);
1269 goto finish_decoding_index;
1272 if (sorted_segments[i]->index_start_position)
1273 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1274 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1276 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1277 t->index_sid = sorted_segments[i]->index_sid;
1278 t->body_sid = sorted_segments[i]->body_sid;
1280 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1281 goto finish_decoding_index;
1283 /* fix zero IndexDurations */
1284 for (k = 0; k < t->nb_segments; k++) {
1285 if (t->segments[k]->index_duration)
1288 if (t->nb_segments > 1)
1289 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1292 if (mxf->fc->nb_streams <= 0) {
1293 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1297 /* assume the first stream's duration is reasonable
1298 * leave index_duration = 0 on further segments in case we have any (unlikely)
1300 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1306 finish_decoding_index:
1307 av_free(sorted_segments);
1311 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1313 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1314 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1315 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1316 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1319 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1321 char buf[AV_TIMECODE_STR_SIZE];
1322 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1327 static int mxf_parse_structural_metadata(MXFContext *mxf)
1329 MXFPackage *material_package = NULL;
1330 MXFPackage *temp_package = NULL;
1333 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1334 /* TODO: handle multiple material packages (OP3x) */
1335 for (i = 0; i < mxf->packages_count; i++) {
1336 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1337 if (material_package) break;
1339 if (!material_package) {
1340 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1341 return AVERROR_INVALIDDATA;
1344 for (i = 0; i < material_package->tracks_count; i++) {
1345 MXFPackage *source_package = NULL;
1346 MXFTrack *material_track = NULL;
1347 MXFTrack *source_track = NULL;
1348 MXFTrack *temp_track = NULL;
1349 MXFDescriptor *descriptor = NULL;
1350 MXFStructuralComponent *component = NULL;
1351 MXFTimecodeComponent *mxf_tc = NULL;
1352 UID *essence_container_ul = NULL;
1353 const MXFCodecUL *codec_ul = NULL;
1354 const MXFCodecUL *container_ul = NULL;
1355 const MXFCodecUL *pix_fmt_ul = NULL;
1360 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1361 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1365 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1366 mxf_tc = (MXFTimecodeComponent*)component;
1367 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1368 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1369 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1373 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1374 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1378 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1379 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1383 mxf_tc = (MXFTimecodeComponent*)component;
1384 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1385 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1386 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1391 /* TODO: handle multiple source clips */
1392 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1393 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1397 for (k = 0; k < mxf->packages_count; k++) {
1398 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1401 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1402 source_package = temp_package;
1406 if (!source_package) {
1407 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1410 for (k = 0; k < source_package->tracks_count; k++) {
1411 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1412 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1413 ret = AVERROR_INVALIDDATA;
1416 if (temp_track->track_id == component->source_track_id) {
1417 source_track = temp_track;
1421 if (!source_track) {
1422 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1426 if (!source_track || !component)
1429 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1430 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1431 ret = AVERROR_INVALIDDATA;
1435 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1436 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1437 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1438 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1442 st = avformat_new_stream(mxf->fc, NULL);
1444 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1445 ret = AVERROR(ENOMEM);
1448 st->id = source_track->track_id;
1449 st->priv_data = source_track;
1450 source_track->original_duration = st->duration = component->duration;
1451 if (st->duration == -1)
1452 st->duration = AV_NOPTS_VALUE;
1453 st->start_time = component->start_position;
1454 if (material_track->edit_rate.num <= 0 || material_track->edit_rate.den <= 0) {
1455 av_log(mxf->fc, AV_LOG_WARNING,
1456 "invalid edit rate (%d/%d) found on stream #%d, defaulting to 25/1\n",
1457 material_track->edit_rate.num, material_track->edit_rate.den, st->index);
1458 material_track->edit_rate = (AVRational){25, 1};
1460 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1462 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only the former is accessible via st->priv_data */
1463 source_track->edit_rate = material_track->edit_rate;
1465 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1466 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1467 st->codec->codec_type = codec_ul->id;
1469 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1470 if (source_package->descriptor) {
1471 if (source_package->descriptor->type == MultipleDescriptor) {
1472 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1473 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1475 if (!sub_descriptor) {
1476 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1479 if (sub_descriptor->linked_track_id == source_track->track_id) {
1480 descriptor = sub_descriptor;
1484 } else if (source_package->descriptor->type == Descriptor)
1485 descriptor = source_package->descriptor;
1488 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1491 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1492 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1493 essence_container_ul = &descriptor->essence_container_ul;
1494 /* HACK: replacing the original key with mxf_encrypted_essence_container
1495 * is not allowed according to s429-6, try to find correct information anyway */
1496 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1497 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1498 for (k = 0; k < mxf->metadata_sets_count; k++) {
1499 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1500 if (metadata->type == CryptoContext) {
1501 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1507 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1508 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1509 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1510 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1511 avcodec_get_name(st->codec->codec_id));
1512 for (k = 0; k < 16; k++) {
1513 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1514 descriptor->essence_codec_ul[k]);
1515 if (!(k+1 & 19) || k == 5)
1516 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1518 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1519 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1520 source_track->intra_only = mxf_is_intra_only(descriptor);
1521 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1522 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1523 st->codec->codec_id = container_ul->id;
1524 st->codec->width = descriptor->width;
1525 st->codec->height = descriptor->height; /* Field height, not frame height */
1526 switch (descriptor->frame_layout) {
1527 case SegmentedFrame:
1528 /* This one is a weird layout I don't fully understand. */
1529 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1532 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1535 /* Every other line is stored and needs to be duplicated. */
1536 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1537 break; /* The correct thing to do here is fall through, but by breaking we might be
1538 able to decode some streams at half the vertical resolution, rather than not al all.
1539 It's also for compatibility with the old behavior. */
1542 case SeparateFields:
1543 st->codec->height *= 2; /* Turn field height into frame height. */
1546 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1548 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1549 st->codec->pix_fmt = descriptor->pix_fmt;
1550 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1551 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1552 &descriptor->essence_codec_ul);
1553 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1554 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1555 /* support files created before RP224v10 by defaulting to UYVY422
1556 if subsampling is 4:2:2 and component depth is 8-bit */
1557 if (descriptor->horiz_subsampling == 2 &&
1558 descriptor->vert_subsampling == 1 &&
1559 descriptor->component_depth == 8) {
1560 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1565 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1566 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1567 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1568 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1569 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))
1570 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1571 st->codec->channels = descriptor->channels;
1572 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1574 if (descriptor->sample_rate.den > 0) {
1575 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1576 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1578 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1579 "found for stream #%d, time base forced to 1/48000\n",
1580 descriptor->sample_rate.num, descriptor->sample_rate.den,
1582 avpriv_set_pts_info(st, 64, 1, 48000);
1585 /* if duration is set, rescale it from EditRate to SampleRate */
1586 if (st->duration != AV_NOPTS_VALUE)
1587 st->duration = av_rescale_q(st->duration, av_inv_q(material_track->edit_rate), st->time_base);
1589 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1590 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1591 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1592 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1593 else if (descriptor->bits_per_sample == 32)
1594 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1595 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1596 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1597 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1598 else if (descriptor->bits_per_sample == 32)
1599 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1600 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1601 st->need_parsing = AVSTREAM_PARSE_FULL;
1604 if (descriptor->extradata) {
1605 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1606 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1608 } else if(st->codec->codec_id == AV_CODEC_ID_H264) {
1609 ff_generate_avci_extradata(st);
1611 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1612 /* TODO: decode timestamps */
1613 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1622 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1628 return AVERROR(EINVAL);
1630 buf_size = size + size/2 + 1;
1631 *str = av_malloc(buf_size);
1633 return AVERROR(ENOMEM);
1635 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1643 static int mxf_uid_to_str(UID uid, char **str)
1647 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1649 return AVERROR(ENOMEM);
1650 for (i = 0; i < sizeof(UID); i++) {
1651 snprintf(p, 2 + 1, "%.2x", uid[i]);
1653 if (i == 3 || i == 5 || i == 7 || i == 9) {
1654 snprintf(p, 1 + 1, "-");
1661 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1663 struct tm time = {0};
1664 time.tm_year = (timestamp >> 48) - 1900;
1665 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1666 time.tm_mday = (timestamp >> 32 & 0xFF);
1667 time.tm_hour = (timestamp >> 24 & 0xFF);
1668 time.tm_min = (timestamp >> 16 & 0xFF);
1669 time.tm_sec = (timestamp >> 8 & 0xFF);
1671 /* ensure month/day are valid */
1672 time.tm_mon = FFMAX(time.tm_mon, 0);
1673 time.tm_mday = FFMAX(time.tm_mday, 1);
1675 *str = av_mallocz(32);
1677 return AVERROR(ENOMEM);
1678 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1683 #define SET_STR_METADATA(pb, name, str) do { \
1684 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1686 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1689 #define SET_UID_METADATA(pb, name, var, str) do { \
1690 avio_read(pb, var, 16); \
1691 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1693 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1696 #define SET_TS_METADATA(pb, name, var, str) do { \
1697 var = avio_rb64(pb); \
1698 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1700 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1703 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1705 MXFContext *mxf = arg;
1706 AVFormatContext *s = mxf->fc;
1713 SET_STR_METADATA(pb, "company_name", str);
1716 SET_STR_METADATA(pb, "product_name", str);
1719 SET_STR_METADATA(pb, "product_version", str);
1722 SET_UID_METADATA(pb, "product_uid", uid, str);
1725 SET_TS_METADATA(pb, "modification_date", ts, str);
1728 SET_STR_METADATA(pb, "application_platform", str);
1731 SET_UID_METADATA(pb, "generation_uid", uid, str);
1734 SET_UID_METADATA(pb, "uid", uid, str);
1740 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1756 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1759 { { 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 */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1762 { { 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 */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1766 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1767 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1768 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1769 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1770 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1773 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1775 AVIOContext *pb = mxf->fc->pb;
1776 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1777 uint64_t klv_end = avio_tell(pb) + klv->length;
1780 return AVERROR(ENOMEM);
1781 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1783 int tag = avio_rb16(pb);
1784 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1785 uint64_t next = avio_tell(pb) + size;
1788 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1789 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1790 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1793 if (tag > 0x7FFF) { /* dynamic tag */
1795 for (i = 0; i < mxf->local_tags_count; i++) {
1796 int local_tag = AV_RB16(mxf->local_tags+i*18);
1797 if (local_tag == tag) {
1798 memcpy(uid, mxf->local_tags+i*18+2, 16);
1799 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1800 PRINT_KEY(mxf->fc, "uid", uid);
1804 if (ctx_size && tag == 0x3C0A)
1805 avio_read(pb, ctx->uid, 16);
1806 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1809 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1810 * it extending past the end of the KLV though (zzuf5.mxf). */
1811 if (avio_tell(pb) > klv_end) {
1815 av_log(mxf->fc, AV_LOG_ERROR,
1816 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1818 return AVERROR_INVALIDDATA;
1819 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1820 avio_seek(pb, next, SEEK_SET);
1822 if (ctx_size) ctx->type = type;
1823 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1827 * Seeks to the previous partition, if possible
1828 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1830 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1832 AVIOContext *pb = mxf->fc->pb;
1834 if (!mxf->current_partition ||
1835 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1836 return 0; /* we've parsed all partitions */
1838 /* seek to previous partition */
1839 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1840 mxf->current_partition = NULL;
1842 av_dlog(mxf->fc, "seeking to previous partition\n");
1848 * Called when essence is encountered
1849 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1851 static int mxf_parse_handle_essence(MXFContext *mxf)
1853 AVIOContext *pb = mxf->fc->pb;
1856 if (mxf->parsing_backward) {
1857 return mxf_seek_to_previous_partition(mxf);
1858 } else if (mxf->footer_partition || mxf->last_partition){
1861 offset = mxf->footer_partition ? mxf->footer_partition : mxf->last_partition;
1863 av_dlog(mxf->fc, "seeking to last partition\n");
1865 /* remember where we were so we don't end up seeking further back than this */
1866 mxf->last_forward_tell = avio_tell(pb);
1868 if (!pb->seekable) {
1869 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1873 /* seek to last partition and parse backward */
1874 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1875 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to last partition @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1876 mxf->run_in + offset, ret);
1880 mxf->current_partition = NULL;
1881 mxf->parsing_backward = 1;
1883 av_dlog(mxf->fc, "can't find last partition\n");
1891 * Called when the next partition or EOF is encountered
1892 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1894 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1896 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1900 * Figures out the proper offset and length of the essence container in each partition
1902 static void mxf_compute_essence_containers(MXFContext *mxf)
1906 /* everything is already correct */
1907 if (mxf->op == OPAtom)
1910 for (x = 0; x < mxf->partitions_count; x++) {
1911 MXFPartition *p = &mxf->partitions[x];
1914 continue; /* BodySID == 0 -> no essence */
1916 if (x >= mxf->partitions_count - 1)
1917 break; /* last partition - can't compute length (and we don't need to) */
1919 /* essence container spans to the next partition */
1920 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1922 if (p->essence_length < 0) {
1923 /* next ThisPartition < essence_offset */
1924 p->essence_length = 0;
1925 av_log(mxf->fc, AV_LOG_ERROR,
1926 "partition %i: bad ThisPartition = %"PRIX64"\n",
1927 x+1, mxf->partitions[x+1].this_partition);
1932 static int64_t round_to_kag(int64_t position, int kag_size)
1934 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1935 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1936 int64_t ret = (position / kag_size) * kag_size;
1937 return ret == position ? ret : ret + kag_size;
1940 static int is_pcm(enum AVCodecID codec_id)
1942 /* we only care about "normal" PCM codecs until we get samples */
1943 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1947 * Deal with the case where for some audio atoms EditUnitByteCount is
1948 * very small (2, 4..). In those cases we should read more than one
1949 * sample per call to mxf_read_packet().
1951 static void mxf_handle_small_eubc(AVFormatContext *s)
1953 MXFContext *mxf = s->priv_data;
1955 /* assuming non-OPAtom == frame wrapped
1956 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1957 if (mxf->op != OPAtom)
1960 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1961 if (s->nb_streams != 1 ||
1962 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1963 !is_pcm(s->streams[0]->codec->codec_id) ||
1964 mxf->nb_index_tables != 1 ||
1965 mxf->index_tables[0].nb_segments != 1 ||
1966 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1969 /* arbitrarily default to 48 kHz PAL audio frame size */
1970 /* TODO: We could compute this from the ratio between the audio
1971 * and video edit rates for 48 kHz NTSC we could use the
1972 * 1802-1802-1802-1802-1801 pattern. */
1973 mxf->edit_units_per_packet = 1920;
1976 static void mxf_read_random_index_pack(AVFormatContext *s)
1978 MXFContext *mxf = s->priv_data;
1983 if (!s->pb->seekable)
1986 file_size = avio_size(s->pb);
1987 avio_seek(s->pb, file_size - 4, SEEK_SET);
1988 length = avio_rb32(s->pb);
1989 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
1991 avio_seek(s->pb, file_size - length, SEEK_SET);
1992 if (klv_read_packet(&klv, s->pb) < 0 ||
1993 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
1994 klv.length != length - 20)
1997 avio_skip(s->pb, klv.length - 12);
1998 mxf->last_partition = avio_rb64(s->pb);
2001 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2004 static int mxf_read_header(AVFormatContext *s)
2006 MXFContext *mxf = s->priv_data;
2008 int64_t essence_offset = 0;
2011 mxf->last_forward_tell = INT64_MAX;
2012 mxf->edit_units_per_packet = 1;
2014 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2015 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2016 return AVERROR_INVALIDDATA;
2018 avio_seek(s->pb, -14, SEEK_CUR);
2020 mxf->run_in = avio_tell(s->pb);
2022 mxf_read_random_index_pack(s);
2024 while (!url_feof(s->pb)) {
2025 const MXFMetadataReadTableEntry *metadata;
2027 if (klv_read_packet(&klv, s->pb) < 0) {
2028 /* EOF - seek to previous partition or stop */
2029 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2035 PRINT_KEY(s, "read header", klv.key);
2036 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2037 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2038 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2039 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2040 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2042 if (!mxf->current_partition) {
2043 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2044 return AVERROR_INVALIDDATA;
2047 if (!mxf->current_partition->essence_offset) {
2048 /* for OP1a we compute essence_offset
2049 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2050 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2051 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2053 int64_t op1a_essence_offset =
2054 round_to_kag(mxf->current_partition->this_partition +
2055 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2056 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2057 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2059 if (mxf->op == OPAtom) {
2060 /* point essence_offset to the actual data
2061 * OPAtom has all the essence in one big KLV
2063 mxf->current_partition->essence_offset = avio_tell(s->pb);
2064 mxf->current_partition->essence_length = klv.length;
2066 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2067 mxf->current_partition->essence_offset = op1a_essence_offset;
2071 if (!essence_offset)
2072 essence_offset = klv.offset;
2074 /* seek to footer, previous partition or stop */
2075 if (mxf_parse_handle_essence(mxf) <= 0)
2078 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2079 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2080 /* next partition pack - keep going, seek to previous partition or stop */
2081 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2083 else if (mxf->parsing_backward)
2085 /* we're still parsing forward. proceed to parsing this partition pack */
2088 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2089 if (IS_KLV_KEY(klv.key, metadata->key)) {
2091 if (klv.key[5] == 0x53) {
2092 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2094 uint64_t next = avio_tell(s->pb) + klv.length;
2095 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2097 /* only seek forward, else this can loop for a long time */
2098 if (avio_tell(s->pb) > next) {
2099 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2101 return AVERROR_INVALIDDATA;
2104 avio_seek(s->pb, next, SEEK_SET);
2107 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2113 if (!metadata->read)
2114 avio_skip(s->pb, klv.length);
2116 /* FIXME avoid seek */
2117 if (!essence_offset) {
2118 av_log(s, AV_LOG_ERROR, "no essence\n");
2119 return AVERROR_INVALIDDATA;
2121 avio_seek(s->pb, essence_offset, SEEK_SET);
2123 mxf_compute_essence_containers(mxf);
2125 /* we need to do this before computing the index tables
2126 * to be able to fill in zero IndexDurations with st->duration */
2127 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2130 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2133 if (mxf->nb_index_tables > 1) {
2134 /* TODO: look up which IndexSID to use via EssenceContainerData */
2135 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2136 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2137 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2138 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2139 ret = AVERROR_INVALIDDATA;
2143 mxf_handle_small_eubc(s);
2153 * Sets mxf->current_edit_unit based on what offset we're currently at.
2154 * @return next_ofs if OK, <0 on error
2156 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2158 int64_t last_ofs = -1, next_ofs = -1;
2159 MXFIndexTable *t = &mxf->index_tables[0];
2161 /* this is called from the OP1a demuxing logic, which means there
2162 * may be no index tables */
2163 if (mxf->nb_index_tables <= 0)
2166 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2167 while (mxf->current_edit_unit >= 0) {
2168 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2171 if (next_ofs <= last_ofs) {
2172 /* large next_ofs didn't change or current_edit_unit wrapped
2173 * around this fixes the infinite loop on zzuf3.mxf */
2174 av_log(mxf->fc, AV_LOG_ERROR,
2175 "next_ofs didn't change. not deriving packet timestamps\n");
2179 if (next_ofs > current_offset)
2182 last_ofs = next_ofs;
2183 mxf->current_edit_unit++;
2186 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2187 if (mxf->current_edit_unit < 0)
2193 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
2195 int i, total = 0, size = 0;
2196 AVStream *st = mxf->fc->streams[stream_index];
2197 MXFTrack *track = st->priv_data;
2198 AVRational time_base = av_inv_q(track->edit_rate);
2199 AVRational sample_rate = av_inv_q(st->time_base);
2200 const MXFSamplesPerFrame *spf = NULL;
2202 if ((sample_rate.num / sample_rate.den) == 48000)
2203 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2205 int remainder = (sample_rate.num * time_base.num) % (time_base.den * sample_rate.den);
2206 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2207 av_mul_q(sample_rate, time_base)));
2209 av_log(mxf->fc, AV_LOG_WARNING,
2210 "seeking detected on stream #%d with time base (%d/%d) and sample rate (%d/%d), audio pts won't be accurate.\n",
2211 stream_index, time_base.num, time_base.den, sample_rate.num, sample_rate.den);
2215 while (spf->samples_per_frame[size]) {
2216 total += spf->samples_per_frame[size];
2222 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2223 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2224 *sample_count += spf->samples_per_frame[i];
2230 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
2232 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2233 pkt->pts = track->sample_count;
2234 if ( codec->channels <= 0
2235 || av_get_bits_per_sample(codec->codec_id) <= 0
2236 || codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) < 8)
2237 return AVERROR(EINVAL);
2238 track->sample_count += pkt->size / (codec->channels * (int64_t)av_get_bits_per_sample(codec->codec_id) / 8);
2242 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2245 MXFContext *mxf = s->priv_data;
2247 while (klv_read_packet(&klv, s->pb) == 0) {
2249 PRINT_KEY(s, "read packet", klv.key);
2250 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2251 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2252 ret = mxf_decrypt_triplet(s, pkt, &klv);
2254 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2255 return AVERROR_INVALIDDATA;
2259 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2260 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2261 int index = mxf_get_stream_index(s, &klv);
2262 int64_t next_ofs, next_klv;
2265 AVCodecContext *codec;
2268 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2272 st = s->streams[index];
2273 track = st->priv_data;
2275 if (s->streams[index]->discard == AVDISCARD_ALL)
2278 next_klv = avio_tell(s->pb) + klv.length;
2279 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2281 if (next_ofs >= 0 && next_klv > next_ofs) {
2282 /* if this check is hit then it's possible OPAtom was treated as OP1a
2283 * truncate the packet since it's probably very large (>2 GiB is common) */
2284 avpriv_request_sample(s,
2285 "OPAtom misinterpreted as OP1a?"
2286 "KLV for edit unit %i extending into "
2288 mxf->current_edit_unit);
2289 klv.length = next_ofs - avio_tell(s->pb);
2292 /* check for 8 channels AES3 element */
2293 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2294 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2295 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2296 return AVERROR_INVALIDDATA;
2299 ret = av_get_packet(s->pb, pkt, klv.length);
2303 pkt->stream_index = index;
2304 pkt->pos = klv.offset;
2306 codec = s->streams[index]->codec;
2307 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2308 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2309 MXFIndexTable *t = &mxf->index_tables[0];
2311 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2312 pkt->dts = mxf->current_edit_unit + t->first_dts;
2313 pkt->pts = t->ptses[mxf->current_edit_unit];
2314 } else if (track->intra_only) {
2315 /* intra-only -> PTS = EditUnit.
2316 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2317 pkt->pts = mxf->current_edit_unit;
2319 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2320 int ret = mxf_set_audio_pts(mxf, codec, pkt);
2325 /* seek for truncated packets */
2326 avio_seek(s->pb, next_klv, SEEK_SET);
2331 avio_skip(s->pb, klv.length);
2333 return url_feof(s->pb) ? AVERROR_EOF : -1;
2336 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2338 MXFContext *mxf = s->priv_data;
2340 int64_t ret64, pos, next_pos;
2345 if (mxf->op != OPAtom)
2346 return mxf_read_packet_old(s, pkt);
2348 /* OPAtom - clip wrapped demuxing */
2349 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2351 t = &mxf->index_tables[0];
2353 if (mxf->current_edit_unit >= st->duration)
2356 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2358 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2361 /* compute size by finding the next edit unit or the end of the essence container
2362 * not pretty, but it works */
2363 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2364 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2365 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2366 return AVERROR_INVALIDDATA;
2369 if ((size = next_pos - pos) <= 0) {
2370 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2371 return AVERROR_INVALIDDATA;
2374 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2377 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2380 pkt->stream_index = 0;
2382 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2383 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2384 pkt->dts = mxf->current_edit_unit + t->first_dts;
2385 pkt->pts = t->ptses[mxf->current_edit_unit];
2386 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2387 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2392 mxf->current_edit_unit += edit_units;
2397 static int mxf_read_close(AVFormatContext *s)
2399 MXFContext *mxf = s->priv_data;
2400 MXFIndexTableSegment *seg;
2403 av_freep(&mxf->packages_refs);
2405 for (i = 0; i < s->nb_streams; i++)
2406 s->streams[i]->priv_data = NULL;
2408 for (i = 0; i < mxf->metadata_sets_count; i++) {
2409 switch (mxf->metadata_sets[i]->type) {
2411 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2413 case MultipleDescriptor:
2414 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2417 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2420 case MaterialPackage:
2421 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2423 case IndexTableSegment:
2424 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2425 av_freep(&seg->temporal_offset_entries);
2426 av_freep(&seg->flag_entries);
2427 av_freep(&seg->stream_offset_entries);
2432 av_freep(&mxf->metadata_sets[i]);
2434 av_freep(&mxf->partitions);
2435 av_freep(&mxf->metadata_sets);
2436 av_freep(&mxf->aesc);
2437 av_freep(&mxf->local_tags);
2439 if (mxf->index_tables) {
2440 for (i = 0; i < mxf->nb_index_tables; i++) {
2441 av_freep(&mxf->index_tables[i].segments);
2442 av_freep(&mxf->index_tables[i].ptses);
2443 av_freep(&mxf->index_tables[i].fake_index);
2446 av_freep(&mxf->index_tables);
2451 static int mxf_probe(AVProbeData *p) {
2452 const uint8_t *bufp = p->buf;
2453 const uint8_t *end = p->buf + p->buf_size;
2455 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2458 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2459 end -= sizeof(mxf_header_partition_pack_key);
2461 for (; bufp < end;) {
2462 if (!((bufp[13] - 1) & 0xF2)){
2463 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
2464 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
2465 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
2466 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
2467 return AVPROBE_SCORE_MAX;
2476 /* rudimentary byte seek */
2477 /* XXX: use MXF Index */
2478 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2480 AVStream *st = s->streams[stream_index];
2482 MXFContext* mxf = s->priv_data;
2487 MXFTrack *source_track = st->priv_data;
2489 /* if audio then truncate sample_time to EditRate */
2490 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2491 sample_time = av_rescale_q(sample_time, st->time_base, av_inv_q(source_track->edit_rate));
2493 if (mxf->nb_index_tables <= 0) {
2495 return AVERROR_INVALIDDATA;
2496 if (sample_time < 0)
2498 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2500 if ((ret64 = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2502 ff_update_cur_dts(s, st, sample_time);
2503 mxf->current_edit_unit = sample_time;
2505 t = &mxf->index_tables[0];
2507 /* clamp above zero, else ff_index_search_timestamp() returns negative
2508 * this also means we allow seeking before the start */
2509 sample_time = FFMAX(sample_time, 0);
2511 if (t->fake_index) {
2512 /* behave as if we have a proper index */
2513 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2516 /* no IndexEntryArray (one or more CBR segments)
2517 * make sure we don't seek past the end */
2518 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2521 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2524 ff_update_cur_dts(s, st, sample_time);
2525 mxf->current_edit_unit = sample_time;
2526 avio_seek(s->pb, seekpos, SEEK_SET);
2529 // Update all tracks sample count
2530 for (i = 0; i < s->nb_streams; i++) {
2531 AVStream *cur_st = s->streams[i];
2532 MXFTrack *cur_track = cur_st->priv_data;
2533 uint64_t current_sample_count = 0;
2534 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2535 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
2539 cur_track->sample_count = current_sample_count;
2545 AVInputFormat ff_mxf_demuxer = {
2547 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2548 .priv_data_size = sizeof(MXFContext),
2549 .read_probe = mxf_probe,
2550 .read_header = mxf_read_header,
2551 .read_packet = mxf_read_packet,
2552 .read_close = mxf_read_close,
2553 .read_seek = mxf_read_seek,