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/mathematics.h"
50 #include "libavcodec/bytestream.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;
139 enum MXFMetadataSetType type;
140 UID essence_container_ul;
141 UID essence_codec_ul;
142 AVRational sample_rate;
143 AVRational aspect_ratio;
145 int height; /* Field height, not frame height */
146 int frame_layout; /* See MXFFrameLayout enum */
149 unsigned int component_depth;
150 unsigned int horiz_subsampling;
151 unsigned int vert_subsampling;
152 UID *sub_descriptors_refs;
153 int sub_descriptors_count;
157 enum AVPixelFormat pix_fmt;
162 enum MXFMetadataSetType type;
163 int edit_unit_byte_count;
166 AVRational index_edit_rate;
167 uint64_t index_start_position;
168 uint64_t index_duration;
169 int8_t *temporal_offset_entries;
171 uint64_t *stream_offset_entries;
172 int nb_index_entries;
173 } MXFIndexTableSegment;
177 enum MXFMetadataSetType type;
181 MXFDescriptor *descriptor; /* only one */
187 enum MXFMetadataSetType type;
190 /* decoded index table */
194 int nb_ptses; /* number of PTSes or total duration of index */
195 int64_t first_dts; /* DTS = EditUnit + first_dts */
196 int64_t *ptses; /* maps EditUnit -> PTS */
198 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
199 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
203 MXFPartition *partitions;
204 unsigned partitions_count;
208 MXFMetadataSet **metadata_sets;
209 int metadata_sets_count;
213 int local_tags_count;
214 uint64_t footer_partition;
215 KLVPacket current_klv_data;
216 int current_klv_index;
218 MXFPartition *current_partition;
219 int parsing_backward;
220 int64_t last_forward_tell;
221 int last_forward_partition;
222 int current_edit_unit;
224 MXFIndexTable *index_tables;
225 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
228 enum MXFWrappingScheme {
233 /* NOTE: klv_offset is not set (-1) for local keys */
234 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
238 MXFMetadataReadFunc *read;
240 enum MXFMetadataSetType type;
241 } MXFMetadataReadTableEntry;
243 static int mxf_read_close(AVFormatContext *s);
245 /* partial keys to match */
246 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
247 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
248 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
249 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
250 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
251 /* complete keys to match */
252 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 };
253 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
254 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
255 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
257 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
259 static int64_t klv_decode_ber_length(AVIOContext *pb)
261 uint64_t size = avio_r8(pb);
262 if (size & 0x80) { /* long form */
263 int bytes_num = size & 0x7f;
264 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
266 return AVERROR_INVALIDDATA;
269 size = size << 8 | avio_r8(pb);
274 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
277 for (i = 0; i < size && !url_feof(pb); i++) {
281 else if (b != key[i])
287 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
289 if (!mxf_read_sync(pb, mxf_klv_key, 4))
290 return AVERROR_INVALIDDATA;
291 klv->offset = avio_tell(pb) - 4;
292 memcpy(klv->key, mxf_klv_key, 4);
293 avio_read(pb, klv->key + 4, 12);
294 klv->length = klv_decode_ber_length(pb);
295 return klv->length == -1 ? -1 : 0;
298 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
302 for (i = 0; i < s->nb_streams; i++) {
303 MXFTrack *track = s->streams[i]->priv_data;
305 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
308 /* return 0 if only one stream, for OP Atom files with 0 as track number */
309 return s->nb_streams == 1 ? 0 : -1;
312 /* XXX: use AVBitStreamFilter */
313 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
315 const uint8_t *buf_ptr, *end_ptr;
319 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
320 return AVERROR_INVALIDDATA;
321 length = av_get_packet(pb, pkt, length);
324 data_ptr = pkt->data;
325 end_ptr = pkt->data + length;
326 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
327 for (; buf_ptr + st->codec->channels*4 <= end_ptr; ) {
328 for (i = 0; i < st->codec->channels; i++) {
329 uint32_t sample = bytestream_get_le32(&buf_ptr);
330 if (st->codec->bits_per_coded_sample == 24)
331 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
333 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
335 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
337 av_shrink_packet(pkt, data_ptr - pkt->data);
341 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
343 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
344 MXFContext *mxf = s->priv_data;
345 AVIOContext *pb = s->pb;
346 int64_t end = avio_tell(pb) + klv->length;
349 uint64_t plaintext_size;
354 if (!mxf->aesc && s->key && s->keylen == 16) {
355 mxf->aesc = av_aes_alloc();
357 return AVERROR(ENOMEM);
358 av_aes_init(mxf->aesc, s->key, 128, 1);
361 avio_skip(pb, klv_decode_ber_length(pb));
363 klv_decode_ber_length(pb);
364 plaintext_size = avio_rb64(pb);
366 klv_decode_ber_length(pb);
367 avio_read(pb, klv->key, 16);
368 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
369 return AVERROR_INVALIDDATA;
370 index = mxf_get_stream_index(s, klv);
372 return AVERROR_INVALIDDATA;
374 klv_decode_ber_length(pb);
375 orig_size = avio_rb64(pb);
376 if (orig_size < plaintext_size)
377 return AVERROR_INVALIDDATA;
379 size = klv_decode_ber_length(pb);
380 if (size < 32 || size - 32 < orig_size)
381 return AVERROR_INVALIDDATA;
382 avio_read(pb, ivec, 16);
383 avio_read(pb, tmpbuf, 16);
385 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
386 if (memcmp(tmpbuf, checkv, 16))
387 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
389 size = av_get_packet(pb, pkt, size);
392 else if (size < plaintext_size)
393 return AVERROR_INVALIDDATA;
394 size -= plaintext_size;
396 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
397 &pkt->data[plaintext_size], size >> 4, ivec, 1);
398 av_shrink_packet(pkt, orig_size);
399 pkt->stream_index = index;
400 avio_skip(pb, end - avio_tell(pb));
404 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
406 MXFContext *mxf = arg;
407 int item_num = avio_rb32(pb);
408 int item_len = avio_rb32(pb);
410 if (item_len != 18) {
411 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
413 return AVERROR_PATCHWELCOME;
415 if (item_num > 65536) {
416 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
417 return AVERROR_INVALIDDATA;
419 mxf->local_tags = av_calloc(item_num, item_len);
420 if (!mxf->local_tags)
421 return AVERROR(ENOMEM);
422 mxf->local_tags_count = item_num;
423 avio_read(pb, mxf->local_tags, item_num*item_len);
427 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
429 MXFContext *mxf = arg;
430 MXFPartition *partition, *tmp_part;
432 uint64_t footer_partition;
433 uint32_t nb_essence_containers;
435 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
436 return AVERROR(ENOMEM);
438 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
440 return AVERROR(ENOMEM);
441 mxf->partitions = tmp_part;
443 if (mxf->parsing_backward) {
444 /* insert the new partition pack in the middle
445 * this makes the entries in mxf->partitions sorted by offset */
446 memmove(&mxf->partitions[mxf->last_forward_partition+1],
447 &mxf->partitions[mxf->last_forward_partition],
448 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
449 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
451 mxf->last_forward_partition++;
452 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
455 memset(partition, 0, sizeof(*partition));
456 mxf->partitions_count++;
457 partition->pack_length = avio_tell(pb) - klv_offset + size;
461 partition->type = Header;
464 partition->type = BodyPartition;
467 partition->type = Footer;
470 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
471 return AVERROR_INVALIDDATA;
474 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
475 partition->closed = partition->type == Footer || !(uid[14] & 1);
476 partition->complete = uid[14] > 2;
478 partition->kag_size = avio_rb32(pb);
479 partition->this_partition = avio_rb64(pb);
480 partition->previous_partition = avio_rb64(pb);
481 footer_partition = avio_rb64(pb);
482 partition->header_byte_count = avio_rb64(pb);
483 partition->index_byte_count = avio_rb64(pb);
484 partition->index_sid = avio_rb32(pb);
486 partition->body_sid = avio_rb32(pb);
487 avio_read(pb, op, sizeof(UID));
488 nb_essence_containers = avio_rb32(pb);
490 /* some files don'thave FooterPartition set in every partition */
491 if (footer_partition) {
492 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
493 av_log(mxf->fc, AV_LOG_ERROR,
494 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
495 mxf->footer_partition, footer_partition);
497 mxf->footer_partition = footer_partition;
502 "PartitionPack: ThisPartition = 0x%"PRIX64
503 ", PreviousPartition = 0x%"PRIX64", "
504 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
505 partition->this_partition,
506 partition->previous_partition, footer_partition,
507 partition->index_sid, partition->body_sid);
509 /* sanity check PreviousPartition if set */
510 if (partition->previous_partition &&
511 mxf->run_in + partition->previous_partition >= klv_offset) {
512 av_log(mxf->fc, AV_LOG_ERROR,
513 "PreviousPartition points to this partition or forward\n");
514 return AVERROR_INVALIDDATA;
517 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
518 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
519 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
520 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
521 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
522 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
523 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
524 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
525 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
526 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
527 else if (op[12] == 0x10) {
528 /* SMPTE 390m: "There shall be exactly one essence container"
529 * The following block deals with files that violate this, namely:
530 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
531 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
532 if (nb_essence_containers != 1) {
533 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
537 av_log(mxf->fc, AV_LOG_WARNING, "\"OPAtom\" with %u ECs - assuming %s\n",
538 nb_essence_containers, op == OP1a ? "OP1a" : "OPAtom");
544 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
548 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
549 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
551 if (mxf->op == OPSONYOpt)
552 partition->kag_size = 512;
554 partition->kag_size = 1;
556 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
562 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
564 MXFMetadataSet **tmp;
565 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
566 return AVERROR(ENOMEM);
567 tmp = av_realloc(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->component_depth = avio_rb32(pb);
843 descriptor->horiz_subsampling = avio_rb32(pb);
846 descriptor->vert_subsampling = avio_rb32(pb);
849 descriptor->sample_rate.num = avio_rb32(pb);
850 descriptor->sample_rate.den = avio_rb32(pb);
852 case 0x3D06: /* SoundEssenceCompression */
853 avio_read(pb, descriptor->essence_codec_ul, 16);
856 descriptor->channels = avio_rb32(pb);
859 descriptor->bits_per_sample = avio_rb32(pb);
862 mxf_read_pixel_layout(pb, descriptor);
865 /* Private uid used by SONY C0023S01.mxf */
866 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
867 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
868 if (!descriptor->extradata)
869 return AVERROR(ENOMEM);
870 descriptor->extradata_size = size;
871 avio_read(pb, descriptor->extradata, size);
879 * Match an uid independently of the version byte and up to len common bytes
882 static int mxf_match_uid(const UID key, const UID uid, int len)
885 for (i = 0; i < len; i++) {
886 if (i != 7 && key[i] != uid[i])
892 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
894 while (uls->uid[0]) {
895 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
902 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
908 for (i = 0; i < mxf->metadata_sets_count; i++) {
909 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
910 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
911 return mxf->metadata_sets[i];
917 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
918 // video essence container uls
919 { { 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 */
920 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
921 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
922 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
925 /* EC ULs for intra-only formats */
926 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
927 { { 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 */
928 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
931 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
932 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
933 { { 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 */
934 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
937 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
938 // sound essence container uls
939 { { 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 */
940 { { 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 */
941 { { 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 */
942 { { 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 */
943 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
946 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
948 int i, j, nb_segments = 0;
949 MXFIndexTableSegment **unsorted_segments;
950 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
952 /* count number of segments, allocate arrays and copy unsorted segments */
953 for (i = 0; i < mxf->metadata_sets_count; i++)
954 if (mxf->metadata_sets[i]->type == IndexTableSegment)
958 return AVERROR_INVALIDDATA;
960 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
961 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
962 av_freep(sorted_segments);
963 av_free(unsorted_segments);
964 return AVERROR(ENOMEM);
967 for (i = j = 0; i < mxf->metadata_sets_count; i++)
968 if (mxf->metadata_sets[i]->type == IndexTableSegment)
969 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
971 *nb_sorted_segments = 0;
973 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
974 for (i = 0; i < nb_segments; i++) {
975 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
976 uint64_t best_index_duration = 0;
978 for (j = 0; j < nb_segments; j++) {
979 MXFIndexTableSegment *s = unsorted_segments[j];
981 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
982 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
983 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
985 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
986 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
987 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
989 best_body_sid = s->body_sid;
990 best_index_sid = s->index_sid;
991 best_index_start = s->index_start_position;
992 best_index_duration = s->index_duration;
996 /* no suitable entry found -> we're done */
1000 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1001 last_body_sid = best_body_sid;
1002 last_index_sid = best_index_sid;
1003 last_index_start = best_index_start;
1006 av_free(unsorted_segments);
1012 * Computes the absolute file offset of the given essence container offset
1014 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1017 int64_t offset_in = offset; /* for logging */
1019 for (x = 0; x < mxf->partitions_count; x++) {
1020 MXFPartition *p = &mxf->partitions[x];
1022 if (p->body_sid != body_sid)
1025 if (offset < p->essence_length || !p->essence_length) {
1026 *offset_out = p->essence_offset + offset;
1030 offset -= p->essence_length;
1033 av_log(mxf->fc, AV_LOG_ERROR,
1034 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1035 offset_in, body_sid);
1037 return AVERROR_INVALIDDATA;
1041 * Returns the end position of the essence container with given BodySID, or zero if unknown
1043 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1048 for (x = 0; x < mxf->partitions_count; x++) {
1049 MXFPartition *p = &mxf->partitions[x];
1051 if (p->body_sid != body_sid)
1054 if (!p->essence_length)
1057 ret = p->essence_offset + p->essence_length;
1063 /* EditUnit -> absolute offset */
1064 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)
1067 int64_t offset_temp = 0;
1069 for (i = 0; i < index_table->nb_segments; i++) {
1070 MXFIndexTableSegment *s = index_table->segments[i];
1072 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1074 if (edit_unit < s->index_start_position + s->index_duration) {
1075 int64_t index = edit_unit - s->index_start_position;
1077 if (s->edit_unit_byte_count)
1078 offset_temp += s->edit_unit_byte_count * index;
1079 else if (s->nb_index_entries) {
1080 if (s->nb_index_entries == 2 * s->index_duration + 1)
1081 index *= 2; /* Avid index */
1083 if (index < 0 || index >= s->nb_index_entries) {
1084 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1085 index_table->index_sid, s->index_start_position);
1086 return AVERROR_INVALIDDATA;
1089 offset_temp = s->stream_offset_entries[index];
1091 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1092 index_table->index_sid, s->index_start_position);
1093 return AVERROR_INVALIDDATA;
1097 *edit_unit_out = edit_unit;
1099 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1101 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1102 offset_temp += s->edit_unit_byte_count * s->index_duration;
1107 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);
1109 return AVERROR_INVALIDDATA;
1112 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1115 int8_t max_temporal_offset = -128;
1117 /* first compute how many entries we have */
1118 for (i = 0; i < index_table->nb_segments; i++) {
1119 MXFIndexTableSegment *s = index_table->segments[i];
1121 if (!s->nb_index_entries) {
1122 index_table->nb_ptses = 0;
1123 return 0; /* no TemporalOffsets */
1126 index_table->nb_ptses += s->index_duration;
1129 /* paranoid check */
1130 if (index_table->nb_ptses <= 0)
1133 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1134 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1135 av_freep(&index_table->ptses);
1136 return AVERROR(ENOMEM);
1139 /* we may have a few bad TemporalOffsets
1140 * make sure the corresponding PTSes don't have the bogus value 0 */
1141 for (x = 0; x < index_table->nb_ptses; x++)
1142 index_table->ptses[x] = AV_NOPTS_VALUE;
1156 * We want to transform it into this:
1167 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1168 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1169 * The latter makes DTS <= PTS.
1171 for (i = x = 0; i < index_table->nb_segments; i++) {
1172 MXFIndexTableSegment *s = index_table->segments[i];
1173 int index_delta = 1;
1174 int n = s->nb_index_entries;
1176 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1177 index_delta = 2; /* Avid index */
1178 /* ignore the last entry - it's the size of the essence container */
1182 for (j = 0; j < n; j += index_delta, x++) {
1183 int offset = s->temporal_offset_entries[j] / index_delta;
1184 int index = x + offset;
1186 if (x >= index_table->nb_ptses) {
1187 av_log(mxf->fc, AV_LOG_ERROR,
1188 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1189 s->nb_index_entries, s->index_duration);
1193 index_table->fake_index[x].timestamp = x;
1194 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1196 if (index < 0 || index >= index_table->nb_ptses) {
1197 av_log(mxf->fc, AV_LOG_ERROR,
1198 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1203 index_table->ptses[index] = x;
1204 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1208 index_table->first_dts = -max_temporal_offset;
1214 * Sorts and collects index table segments into index tables.
1215 * Also computes PTSes if possible.
1217 static int mxf_compute_index_tables(MXFContext *mxf)
1219 int i, j, k, ret, nb_sorted_segments;
1220 MXFIndexTableSegment **sorted_segments = NULL;
1222 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1223 nb_sorted_segments <= 0) {
1224 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1228 /* sanity check and count unique BodySIDs/IndexSIDs */
1229 for (i = 0; i < nb_sorted_segments; i++) {
1230 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1231 mxf->nb_index_tables++;
1232 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1233 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1234 ret = AVERROR_INVALIDDATA;
1235 goto finish_decoding_index;
1239 if (!(mxf->index_tables = av_calloc(mxf->nb_index_tables, sizeof(MXFIndexTable)))) {
1240 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1241 ret = AVERROR(ENOMEM);
1242 goto finish_decoding_index;
1245 /* distribute sorted segments to index tables */
1246 for (i = j = 0; i < nb_sorted_segments; i++) {
1247 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1252 mxf->index_tables[j].nb_segments++;
1255 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1256 MXFIndexTable *t = &mxf->index_tables[j];
1258 if (!(t->segments = av_calloc(t->nb_segments, sizeof(MXFIndexTableSegment*)))) {
1259 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment pointer array\n");
1260 ret = AVERROR(ENOMEM);
1261 goto finish_decoding_index;
1264 if (sorted_segments[i]->index_start_position)
1265 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1266 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1268 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1269 t->index_sid = sorted_segments[i]->index_sid;
1270 t->body_sid = sorted_segments[i]->body_sid;
1272 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1273 goto finish_decoding_index;
1275 /* fix zero IndexDurations */
1276 for (k = 0; k < t->nb_segments; k++) {
1277 if (t->segments[k]->index_duration)
1280 if (t->nb_segments > 1)
1281 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1284 if (mxf->fc->nb_streams <= 0) {
1285 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1289 /* assume the first stream's duration is reasonable
1290 * leave index_duration = 0 on further segments in case we have any (unlikely)
1292 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1298 finish_decoding_index:
1299 av_free(sorted_segments);
1303 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1305 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1306 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1307 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1308 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1311 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1313 char buf[AV_TIMECODE_STR_SIZE];
1314 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1319 static int mxf_parse_structural_metadata(MXFContext *mxf)
1321 MXFPackage *material_package = NULL;
1322 MXFPackage *temp_package = NULL;
1325 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1326 /* TODO: handle multiple material packages (OP3x) */
1327 for (i = 0; i < mxf->packages_count; i++) {
1328 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1329 if (material_package) break;
1331 if (!material_package) {
1332 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1333 return AVERROR_INVALIDDATA;
1336 for (i = 0; i < material_package->tracks_count; i++) {
1337 MXFPackage *source_package = NULL;
1338 MXFTrack *material_track = NULL;
1339 MXFTrack *source_track = NULL;
1340 MXFTrack *temp_track = NULL;
1341 MXFDescriptor *descriptor = NULL;
1342 MXFStructuralComponent *component = NULL;
1343 MXFTimecodeComponent *mxf_tc = NULL;
1344 UID *essence_container_ul = NULL;
1345 const MXFCodecUL *codec_ul = NULL;
1346 const MXFCodecUL *container_ul = NULL;
1347 const MXFCodecUL *pix_fmt_ul = NULL;
1352 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1353 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1357 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1358 mxf_tc = (MXFTimecodeComponent*)component;
1359 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1360 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1361 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1365 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1366 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1370 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1371 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1375 mxf_tc = (MXFTimecodeComponent*)component;
1376 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1377 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1378 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1383 /* TODO: handle multiple source clips */
1384 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1385 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1389 for (k = 0; k < mxf->packages_count; k++) {
1390 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1393 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1394 source_package = temp_package;
1398 if (!source_package) {
1399 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1402 for (k = 0; k < source_package->tracks_count; k++) {
1403 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1404 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1405 ret = AVERROR_INVALIDDATA;
1408 if (temp_track->track_id == component->source_track_id) {
1409 source_track = temp_track;
1413 if (!source_track) {
1414 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1418 if (!source_track || !component)
1421 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1422 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1423 ret = AVERROR_INVALIDDATA;
1427 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1428 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1429 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1430 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1434 st = avformat_new_stream(mxf->fc, NULL);
1436 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1437 ret = AVERROR(ENOMEM);
1440 st->id = source_track->track_id;
1441 st->priv_data = source_track;
1442 st->duration = component->duration;
1443 if (st->duration == -1)
1444 st->duration = AV_NOPTS_VALUE;
1445 st->start_time = component->start_position;
1446 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1448 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1449 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1450 st->codec->codec_type = codec_ul->id;
1452 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1453 if (source_package->descriptor) {
1454 if (source_package->descriptor->type == MultipleDescriptor) {
1455 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1456 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1458 if (!sub_descriptor) {
1459 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1462 if (sub_descriptor->linked_track_id == source_track->track_id) {
1463 descriptor = sub_descriptor;
1467 } else if (source_package->descriptor->type == Descriptor)
1468 descriptor = source_package->descriptor;
1471 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1474 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1475 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1476 essence_container_ul = &descriptor->essence_container_ul;
1477 /* HACK: replacing the original key with mxf_encrypted_essence_container
1478 * is not allowed according to s429-6, try to find correct information anyway */
1479 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1480 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1481 for (k = 0; k < mxf->metadata_sets_count; k++) {
1482 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1483 if (metadata->type == CryptoContext) {
1484 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1490 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1491 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1492 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1493 if (descriptor->extradata) {
1494 st->codec->extradata = descriptor->extradata;
1495 st->codec->extradata_size = descriptor->extradata_size;
1497 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1498 source_track->intra_only = mxf_is_intra_only(descriptor);
1499 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1500 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1501 st->codec->codec_id = container_ul->id;
1502 st->codec->width = descriptor->width;
1503 st->codec->height = descriptor->height; /* Field height, not frame height */
1504 switch (descriptor->frame_layout) {
1505 case SegmentedFrame:
1506 /* This one is a weird layout I don't fully understand. */
1507 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1512 /* Every other line is stored and needs to be duplicated. */
1513 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1514 break; /* The correct thing to do here is fall through, but by breaking we might be
1515 able to decode some streams at half the vertical resolution, rather than not al all.
1516 It's also for compatibility with the old behavior. */
1519 case SeparateFields:
1520 st->codec->height *= 2; /* Turn field height into frame height. */
1523 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1525 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1526 st->codec->pix_fmt = descriptor->pix_fmt;
1527 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1528 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1529 &descriptor->essence_codec_ul);
1530 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1531 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1532 /* support files created before RP224v10 by defaulting to UYVY422
1533 if subsampling is 4:2:2 and component depth is 8-bit */
1534 if (descriptor->horiz_subsampling == 2 &&
1535 descriptor->vert_subsampling == 1 &&
1536 descriptor->component_depth == 8) {
1537 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1542 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1543 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1544 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1545 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1546 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))
1547 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1548 st->codec->channels = descriptor->channels;
1549 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1551 if (descriptor->sample_rate.den > 0)
1552 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1554 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1555 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1556 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1557 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1558 else if (descriptor->bits_per_sample == 32)
1559 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1560 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1561 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1562 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1563 else if (descriptor->bits_per_sample == 32)
1564 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1565 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1566 st->need_parsing = AVSTREAM_PARSE_FULL;
1569 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1570 /* TODO: decode timestamps */
1571 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1580 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1587 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1588 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1589 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1590 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1591 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1592 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1593 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1594 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1595 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1596 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1597 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1598 { { 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 */
1599 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1600 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1601 { { 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 */
1602 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1603 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1604 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1605 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1606 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
1607 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1608 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1609 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1612 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1614 AVIOContext *pb = mxf->fc->pb;
1615 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1616 uint64_t klv_end = avio_tell(pb) + klv->length;
1619 return AVERROR(ENOMEM);
1620 while (avio_tell(pb) + 4 < klv_end && !url_feof(pb)) {
1622 int tag = avio_rb16(pb);
1623 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1624 uint64_t next = avio_tell(pb) + size;
1627 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1628 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1629 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1632 if (tag > 0x7FFF) { /* dynamic tag */
1634 for (i = 0; i < mxf->local_tags_count; i++) {
1635 int local_tag = AV_RB16(mxf->local_tags+i*18);
1636 if (local_tag == tag) {
1637 memcpy(uid, mxf->local_tags+i*18+2, 16);
1638 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1639 PRINT_KEY(mxf->fc, "uid", uid);
1643 if (ctx_size && tag == 0x3C0A)
1644 avio_read(pb, ctx->uid, 16);
1645 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1648 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1649 * it extending past the end of the KLV though (zzuf5.mxf). */
1650 if (avio_tell(pb) > klv_end) {
1654 av_log(mxf->fc, AV_LOG_ERROR,
1655 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1657 return AVERROR_INVALIDDATA;
1658 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1659 avio_seek(pb, next, SEEK_SET);
1661 if (ctx_size) ctx->type = type;
1662 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1666 * Seeks to the previous partition, if possible
1667 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1669 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1671 AVIOContext *pb = mxf->fc->pb;
1673 if (!mxf->current_partition ||
1674 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1675 return 0; /* we've parsed all partitions */
1677 /* seek to previous partition */
1678 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1679 mxf->current_partition = NULL;
1681 av_dlog(mxf->fc, "seeking to previous partition\n");
1687 * Called when essence is encountered
1688 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1690 static int mxf_parse_handle_essence(MXFContext *mxf)
1692 AVIOContext *pb = mxf->fc->pb;
1695 if (mxf->parsing_backward) {
1696 return mxf_seek_to_previous_partition(mxf);
1698 if (!mxf->footer_partition) {
1699 av_dlog(mxf->fc, "no footer\n");
1703 av_dlog(mxf->fc, "seeking to footer\n");
1705 /* remember where we were so we don't end up seeking further back than this */
1706 mxf->last_forward_tell = avio_tell(pb);
1708 if (!pb->seekable) {
1709 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1713 /* seek to footer partition and parse backward */
1714 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1715 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1716 mxf->run_in + mxf->footer_partition, ret);
1720 mxf->current_partition = NULL;
1721 mxf->parsing_backward = 1;
1728 * Called when the next partition or EOF is encountered
1729 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1731 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1733 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1737 * Figures out the proper offset and length of the essence container in each partition
1739 static void mxf_compute_essence_containers(MXFContext *mxf)
1743 /* everything is already correct */
1744 if (mxf->op == OPAtom)
1747 for (x = 0; x < mxf->partitions_count; x++) {
1748 MXFPartition *p = &mxf->partitions[x];
1751 continue; /* BodySID == 0 -> no essence */
1753 if (x >= mxf->partitions_count - 1)
1754 break; /* last partition - can't compute length (and we don't need to) */
1756 /* essence container spans to the next partition */
1757 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1759 if (p->essence_length < 0) {
1760 /* next ThisPartition < essence_offset */
1761 p->essence_length = 0;
1762 av_log(mxf->fc, AV_LOG_ERROR,
1763 "partition %i: bad ThisPartition = %"PRIX64"\n",
1764 x+1, mxf->partitions[x+1].this_partition);
1769 static int64_t round_to_kag(int64_t position, int kag_size)
1771 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1772 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1773 int64_t ret = (position / kag_size) * kag_size;
1774 return ret == position ? ret : ret + kag_size;
1777 static int is_pcm(enum AVCodecID codec_id)
1779 /* we only care about "normal" PCM codecs until we get samples */
1780 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1784 * Deal with the case where for some audio atoms EditUnitByteCount is
1785 * very small (2, 4..). In those cases we should read more than one
1786 * sample per call to mxf_read_packet().
1788 static void mxf_handle_small_eubc(AVFormatContext *s)
1790 MXFContext *mxf = s->priv_data;
1792 /* assuming non-OPAtom == frame wrapped
1793 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1794 if (mxf->op != OPAtom)
1797 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1798 if (s->nb_streams != 1 ||
1799 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1800 !is_pcm(s->streams[0]->codec->codec_id) ||
1801 mxf->nb_index_tables != 1 ||
1802 mxf->index_tables[0].nb_segments != 1 ||
1803 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1806 /* arbitrarily default to 48 kHz PAL audio frame size */
1807 /* TODO: We could compute this from the ratio between the audio
1808 * and video edit rates for 48 kHz NTSC we could use the
1809 * 1802-1802-1802-1802-1801 pattern. */
1810 mxf->edit_units_per_packet = 1920;
1813 static int mxf_read_header(AVFormatContext *s)
1815 MXFContext *mxf = s->priv_data;
1817 int64_t essence_offset = 0;
1820 mxf->last_forward_tell = INT64_MAX;
1821 mxf->edit_units_per_packet = 1;
1823 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1824 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1825 return AVERROR_INVALIDDATA;
1827 avio_seek(s->pb, -14, SEEK_CUR);
1829 mxf->run_in = avio_tell(s->pb);
1831 while (!url_feof(s->pb)) {
1832 const MXFMetadataReadTableEntry *metadata;
1834 if (klv_read_packet(&klv, s->pb) < 0) {
1835 /* EOF - seek to previous partition or stop */
1836 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1842 PRINT_KEY(s, "read header", klv.key);
1843 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1844 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1845 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1846 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1847 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1849 if (!mxf->current_partition) {
1850 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
1851 return AVERROR_INVALIDDATA;
1854 if (!mxf->current_partition->essence_offset) {
1855 /* for OP1a we compute essence_offset
1856 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
1857 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
1858 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
1860 int64_t op1a_essence_offset =
1861 round_to_kag(mxf->current_partition->this_partition +
1862 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
1863 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
1864 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
1866 if (mxf->op == OPAtom) {
1867 /* point essence_offset to the actual data
1868 * OPAtom has all the essence in one big KLV
1870 mxf->current_partition->essence_offset = avio_tell(s->pb);
1871 mxf->current_partition->essence_length = klv.length;
1873 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
1874 mxf->current_partition->essence_offset = op1a_essence_offset;
1878 if (!essence_offset)
1879 essence_offset = klv.offset;
1881 /* seek to footer, previous partition or stop */
1882 if (mxf_parse_handle_essence(mxf) <= 0)
1885 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1886 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1887 /* next partition pack - keep going, seek to previous partition or stop */
1888 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1890 else if (mxf->parsing_backward)
1892 /* we're still parsing forward. proceed to parsing this partition pack */
1895 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1896 if (IS_KLV_KEY(klv.key, metadata->key)) {
1898 if (klv.key[5] == 0x53) {
1899 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1901 uint64_t next = avio_tell(s->pb) + klv.length;
1902 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1904 /* only seek forward, else this can loop for a long time */
1905 if (avio_tell(s->pb) > next) {
1906 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1908 return AVERROR_INVALIDDATA;
1911 avio_seek(s->pb, next, SEEK_SET);
1914 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1920 if (!metadata->read)
1921 avio_skip(s->pb, klv.length);
1923 /* FIXME avoid seek */
1924 if (!essence_offset) {
1925 av_log(s, AV_LOG_ERROR, "no essence\n");
1926 return AVERROR_INVALIDDATA;
1928 avio_seek(s->pb, essence_offset, SEEK_SET);
1930 mxf_compute_essence_containers(mxf);
1932 /* we need to do this before computing the index tables
1933 * to be able to fill in zero IndexDurations with st->duration */
1934 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1937 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1940 if (mxf->nb_index_tables > 1) {
1941 /* TODO: look up which IndexSID to use via EssenceContainerData */
1942 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1943 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1944 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1945 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1946 ret = AVERROR_INVALIDDATA;
1950 mxf_handle_small_eubc(s);
1960 * Sets mxf->current_edit_unit based on what offset we're currently at.
1961 * @return next_ofs if OK, <0 on error
1963 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1965 int64_t last_ofs = -1, next_ofs = -1;
1966 MXFIndexTable *t = &mxf->index_tables[0];
1968 /* this is called from the OP1a demuxing logic, which means there
1969 * may be no index tables */
1970 if (mxf->nb_index_tables <= 0)
1973 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
1974 while (mxf->current_edit_unit >= 0) {
1975 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1978 if (next_ofs <= last_ofs) {
1979 /* large next_ofs didn't change or current_edit_unit wrapped
1980 * around this fixes the infinite loop on zzuf3.mxf */
1981 av_log(mxf->fc, AV_LOG_ERROR,
1982 "next_ofs didn't change. not deriving packet timestamps\n");
1986 if (next_ofs > current_offset)
1989 last_ofs = next_ofs;
1990 mxf->current_edit_unit++;
1993 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
1994 if (mxf->current_edit_unit < 0)
2000 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2003 MXFContext *mxf = s->priv_data;
2005 while (!url_feof(s->pb)) {
2007 if (klv_read_packet(&klv, s->pb) < 0)
2009 PRINT_KEY(s, "read packet", klv.key);
2010 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2011 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2012 ret = mxf_decrypt_triplet(s, pkt, &klv);
2014 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2015 return AVERROR_INVALIDDATA;
2019 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2020 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2021 int index = mxf_get_stream_index(s, &klv);
2022 int64_t next_ofs, next_klv;
2027 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2031 st = s->streams[index];
2032 track = st->priv_data;
2034 if (s->streams[index]->discard == AVDISCARD_ALL)
2037 next_klv = avio_tell(s->pb) + klv.length;
2038 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2040 if (next_ofs >= 0 && next_klv > next_ofs) {
2041 /* if this check is hit then it's possible OPAtom was treated as OP1a
2042 * truncate the packet since it's probably very large (>2 GiB is common) */
2043 av_log_ask_for_sample(s,
2044 "KLV for edit unit %i extends into next edit unit - OPAtom misinterpreted as OP1a?\n",
2045 mxf->current_edit_unit);
2046 klv.length = next_ofs - avio_tell(s->pb);
2049 /* check for 8 channels AES3 element */
2050 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2051 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2052 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2053 return AVERROR_INVALIDDATA;
2056 ret = av_get_packet(s->pb, pkt, klv.length);
2060 pkt->stream_index = index;
2061 pkt->pos = klv.offset;
2063 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2064 /* mxf->current_edit_unit good - see if we have an index table to derive timestamps from */
2065 MXFIndexTable *t = &mxf->index_tables[0];
2067 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2068 pkt->dts = mxf->current_edit_unit + t->first_dts;
2069 pkt->pts = t->ptses[mxf->current_edit_unit];
2070 } else if (track->intra_only) {
2071 /* intra-only -> PTS = EditUnit.
2072 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2073 pkt->pts = mxf->current_edit_unit;
2077 /* seek for truncated packets */
2078 avio_seek(s->pb, next_klv, SEEK_SET);
2083 avio_skip(s->pb, klv.length);
2088 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2090 MXFContext *mxf = s->priv_data;
2092 int64_t ret64, pos, next_pos;
2097 if (mxf->op != OPAtom)
2098 return mxf_read_packet_old(s, pkt);
2100 /* OPAtom - clip wrapped demuxing */
2101 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2103 t = &mxf->index_tables[0];
2105 if (mxf->current_edit_unit >= st->duration)
2108 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2110 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2113 /* compute size by finding the next edit unit or the end of the essence container
2114 * not pretty, but it works */
2115 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2116 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2117 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2118 return AVERROR_INVALIDDATA;
2121 if ((size = next_pos - pos) <= 0) {
2122 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2123 return AVERROR_INVALIDDATA;
2126 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2129 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2132 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2133 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2134 pkt->dts = mxf->current_edit_unit + t->first_dts;
2135 pkt->pts = t->ptses[mxf->current_edit_unit];
2138 pkt->stream_index = 0;
2139 mxf->current_edit_unit += edit_units;
2144 static int mxf_read_close(AVFormatContext *s)
2146 MXFContext *mxf = s->priv_data;
2147 MXFIndexTableSegment *seg;
2150 av_freep(&mxf->packages_refs);
2152 for (i = 0; i < s->nb_streams; i++)
2153 s->streams[i]->priv_data = NULL;
2155 for (i = 0; i < mxf->metadata_sets_count; i++) {
2156 switch (mxf->metadata_sets[i]->type) {
2157 case MultipleDescriptor:
2158 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2161 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2164 case MaterialPackage:
2165 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2167 case IndexTableSegment:
2168 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2169 av_freep(&seg->temporal_offset_entries);
2170 av_freep(&seg->flag_entries);
2171 av_freep(&seg->stream_offset_entries);
2176 av_freep(&mxf->metadata_sets[i]);
2178 av_freep(&mxf->partitions);
2179 av_freep(&mxf->metadata_sets);
2180 av_freep(&mxf->aesc);
2181 av_freep(&mxf->local_tags);
2183 for (i = 0; i < mxf->nb_index_tables; i++) {
2184 av_freep(&mxf->index_tables[i].segments);
2185 av_freep(&mxf->index_tables[i].ptses);
2186 av_freep(&mxf->index_tables[i].fake_index);
2188 av_freep(&mxf->index_tables);
2193 static int mxf_probe(AVProbeData *p) {
2194 uint8_t *bufp = p->buf;
2195 uint8_t *end = p->buf + p->buf_size;
2197 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2200 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2201 end -= sizeof(mxf_header_partition_pack_key);
2202 for (; bufp < end; bufp++) {
2203 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2204 return AVPROBE_SCORE_MAX;
2209 /* rudimentary byte seek */
2210 /* XXX: use MXF Index */
2211 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2213 AVStream *st = s->streams[stream_index];
2215 MXFContext* mxf = s->priv_data;
2220 if (mxf->nb_index_tables <= 0) {
2222 return AVERROR_INVALIDDATA;
2223 if (sample_time < 0)
2225 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2227 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2229 ff_update_cur_dts(s, st, sample_time);
2231 t = &mxf->index_tables[0];
2233 /* clamp above zero, else ff_index_search_timestamp() returns negative
2234 * this also means we allow seeking before the start */
2235 sample_time = FFMAX(sample_time, 0);
2237 if (t->fake_index) {
2238 /* behave as if we have a proper index */
2239 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2242 /* no IndexEntryArray (one or more CBR segments)
2243 * make sure we don't seek past the end */
2244 sample_time = FFMIN(sample_time, st->duration - 1);
2247 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2250 ff_update_cur_dts(s, st, sample_time);
2251 mxf->current_edit_unit = sample_time;
2252 avio_seek(s->pb, seekpos, SEEK_SET);
2257 AVInputFormat ff_mxf_demuxer = {
2259 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2260 .priv_data_size = sizeof(MXFContext),
2261 .read_probe = mxf_probe,
2262 .read_header = mxf_read_header,
2263 .read_packet = mxf_read_packet,
2264 .read_close = mxf_read_close,
2265 .read_seek = mxf_read_seek,