3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25 * SMPTE 377M MXF File Format Specifications
26 * SMPTE 378M Operational Pattern 1a
27 * SMPTE 379M MXF Generic Container
28 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
33 * Search for Track numbers which will identify essence element KLV packets.
34 * Search for SourcePackage which define tracks which contains Track numbers.
35 * Material Package contains tracks with reference to SourcePackage tracks.
36 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37 * Assign Descriptors to correct Tracks.
39 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40 * Metadata parsing resolves Strong References to objects.
42 * Simple demuxer, only OP1A supported and some files might not work at all.
43 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
48 #include "libavutil/aes.h"
49 #include "libavutil/avassert.h"
50 #include "libavutil/mathematics.h"
51 #include "libavcodec/bytestream.h"
52 #include "libavutil/intreadwrite.h"
53 #include "libavutil/parseutils.h"
54 #include "libavutil/timecode.h"
76 OPSONYOpt, /* FATE sample, violates the spec in places */
79 typedef struct MXFPartition {
82 MXFPartitionType type;
83 uint64_t previous_partition;
86 int64_t this_partition;
87 int64_t essence_offset; ///< absolute offset of essence
88 int64_t essence_length;
90 int64_t header_byte_count;
91 int64_t index_byte_count;
93 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
96 typedef struct MXFCryptoContext {
98 enum MXFMetadataSetType type;
99 UID source_container_ul;
102 typedef struct MXFStructuralComponent {
104 enum MXFMetadataSetType type;
105 UID source_package_ul;
106 UID source_package_uid;
107 UID data_definition_ul;
109 int64_t start_position;
111 } MXFStructuralComponent;
113 typedef struct MXFSequence {
115 enum MXFMetadataSetType type;
116 UID data_definition_ul;
117 UID *structural_components_refs;
118 int structural_components_count;
123 typedef struct MXFTrack {
125 enum MXFMetadataSetType type;
128 struct AVRational rate;
130 } MXFTimecodeComponent;
134 enum MXFMetadataSetType type;
135 UID input_segment_ref;
136 } MXFPulldownComponent;
140 enum MXFMetadataSetType type;
141 UID *structural_components_refs;
142 int structural_components_count;
148 enum MXFMetadataSetType type;
155 enum MXFMetadataSetType type;
156 MXFSequence *sequence; /* mandatory, and only one */
160 uint8_t track_number[4];
161 AVRational edit_rate;
163 uint64_t sample_count;
164 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
167 typedef struct MXFDescriptor {
169 enum MXFMetadataSetType type;
170 UID essence_container_ul;
171 UID essence_codec_ul;
173 AVRational sample_rate;
174 AVRational aspect_ratio;
176 int height; /* Field height, not frame height */
177 int frame_layout; /* See MXFFrameLayout enum */
178 int video_line_map[2];
179 #define MXF_FIELD_DOMINANCE_DEFAULT 0
180 #define MXF_FIELD_DOMINANCE_FF 1 /* coded first, displayed first */
181 #define MXF_FIELD_DOMINANCE_FL 2 /* coded first, displayed last */
185 int64_t duration; /* ContainerDuration optional property */
186 unsigned int component_depth;
187 unsigned int horiz_subsampling;
188 unsigned int vert_subsampling;
189 UID *sub_descriptors_refs;
190 int sub_descriptors_count;
194 enum AVPixelFormat pix_fmt;
197 typedef struct MXFIndexTableSegment {
199 enum MXFMetadataSetType type;
200 int edit_unit_byte_count;
203 AVRational index_edit_rate;
204 uint64_t index_start_position;
205 uint64_t index_duration;
206 int8_t *temporal_offset_entries;
208 uint64_t *stream_offset_entries;
209 int nb_index_entries;
210 } MXFIndexTableSegment;
212 typedef struct MXFPackage {
214 enum MXFMetadataSetType type;
219 MXFDescriptor *descriptor; /* only one */
226 typedef struct MXFMetadataSet {
228 enum MXFMetadataSetType type;
231 /* decoded index table */
232 typedef struct MXFIndexTable {
235 int nb_ptses; /* number of PTSes or total duration of index */
236 int64_t first_dts; /* DTS = EditUnit + first_dts */
237 int64_t *ptses; /* maps EditUnit -> PTS */
239 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
240 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
241 int8_t *offsets; /* temporal offsets for display order to stored order conversion */
244 typedef struct MXFContext {
245 MXFPartition *partitions;
246 unsigned partitions_count;
250 MXFMetadataSet **metadata_sets;
251 int metadata_sets_count;
255 int local_tags_count;
256 uint64_t footer_partition;
257 KLVPacket current_klv_data;
258 int current_klv_index;
260 MXFPartition *current_partition;
261 int parsing_backward;
262 int64_t last_forward_tell;
263 int last_forward_partition;
264 int current_edit_unit;
266 MXFIndexTable *index_tables;
267 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
270 enum MXFWrappingScheme {
275 /* NOTE: klv_offset is not set (-1) for local keys */
276 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
278 typedef struct MXFMetadataReadTableEntry {
280 MXFMetadataReadFunc *read;
282 enum MXFMetadataSetType type;
283 } MXFMetadataReadTableEntry;
285 static int mxf_read_close(AVFormatContext *s);
287 /* partial keys to match */
288 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
289 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
290 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
291 static const uint8_t mxf_canopus_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x0a,0x0e,0x0f,0x03,0x01 };
292 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
293 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
294 /* complete keys to match */
295 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 };
296 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
297 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
298 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 };
299 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
300 static const uint8_t mxf_avid_project_name[] = { 0xa5,0xfb,0x7b,0x25,0xf6,0x15,0x94,0xb9,0x62,0xfc,0x37,0x17,0x49,0x2d,0x42,0xbf };
301 static const uint8_t mxf_jp2k_rsiz[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 };
302 static const uint8_t mxf_indirect_value_utf16le[] = { 0x4c,0x00,0x02,0x10,0x01,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
303 static const uint8_t mxf_indirect_value_utf16be[] = { 0x42,0x01,0x10,0x02,0x00,0x00,0x00,0x00,0x00,0x06,0x0e,0x2b,0x34,0x01,0x04,0x01,0x01 };
305 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
307 static void mxf_free_metadataset(MXFMetadataSet **ctx, int freectx)
309 MXFIndexTableSegment *seg;
310 switch ((*ctx)->type) {
312 av_freep(&((MXFDescriptor *)*ctx)->extradata);
314 case MultipleDescriptor:
315 av_freep(&((MXFDescriptor *)*ctx)->sub_descriptors_refs);
318 av_freep(&((MXFSequence *)*ctx)->structural_components_refs);
321 av_freep(&((MXFEssenceGroup *)*ctx)->structural_components_refs);
324 case MaterialPackage:
325 av_freep(&((MXFPackage *)*ctx)->tracks_refs);
326 av_freep(&((MXFPackage *)*ctx)->name);
327 av_freep(&((MXFPackage *)*ctx)->comment_refs);
330 av_freep(&((MXFTaggedValue *)*ctx)->name);
331 av_freep(&((MXFTaggedValue *)*ctx)->value);
334 av_freep(&((MXFTrack *)*ctx)->name);
336 case IndexTableSegment:
337 seg = (MXFIndexTableSegment *)*ctx;
338 av_freep(&seg->temporal_offset_entries);
339 av_freep(&seg->flag_entries);
340 av_freep(&seg->stream_offset_entries);
348 static int64_t klv_decode_ber_length(AVIOContext *pb)
350 uint64_t size = avio_r8(pb);
351 if (size & 0x80) { /* long form */
352 int bytes_num = size & 0x7f;
353 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
355 return AVERROR_INVALIDDATA;
358 size = size << 8 | avio_r8(pb);
363 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
366 for (i = 0; i < size && !avio_feof(pb); i++) {
370 else if (b != key[i])
376 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
378 if (!mxf_read_sync(pb, mxf_klv_key, 4))
379 return AVERROR_INVALIDDATA;
380 klv->offset = avio_tell(pb) - 4;
381 memcpy(klv->key, mxf_klv_key, 4);
382 avio_read(pb, klv->key + 4, 12);
383 klv->length = klv_decode_ber_length(pb);
384 return klv->length == -1 ? -1 : 0;
387 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
391 for (i = 0; i < s->nb_streams; i++) {
392 MXFTrack *track = s->streams[i]->priv_data;
394 if (track && !memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
397 /* return 0 if only one stream, for OP Atom files with 0 as track number */
398 return s->nb_streams == 1 ? 0 : -1;
401 /* XXX: use AVBitStreamFilter */
402 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
404 const uint8_t *buf_ptr, *end_ptr;
408 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
409 return AVERROR_INVALIDDATA;
410 length = av_get_packet(pb, pkt, length);
413 data_ptr = pkt->data;
414 end_ptr = pkt->data + length;
415 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
416 for (; end_ptr - buf_ptr >= st->codecpar->channels * 4; ) {
417 for (i = 0; i < st->codecpar->channels; i++) {
418 uint32_t sample = bytestream_get_le32(&buf_ptr);
419 if (st->codecpar->bits_per_coded_sample == 24)
420 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
422 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
424 buf_ptr += 32 - st->codecpar->channels*4; // always 8 channels stored SMPTE 331M
426 av_shrink_packet(pkt, data_ptr - pkt->data);
430 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
432 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
433 MXFContext *mxf = s->priv_data;
434 AVIOContext *pb = s->pb;
435 int64_t end = avio_tell(pb) + klv->length;
438 uint64_t plaintext_size;
443 if (!mxf->aesc && s->key && s->keylen == 16) {
444 mxf->aesc = av_aes_alloc();
446 return AVERROR(ENOMEM);
447 av_aes_init(mxf->aesc, s->key, 128, 1);
450 avio_skip(pb, klv_decode_ber_length(pb));
452 klv_decode_ber_length(pb);
453 plaintext_size = avio_rb64(pb);
455 klv_decode_ber_length(pb);
456 avio_read(pb, klv->key, 16);
457 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
458 return AVERROR_INVALIDDATA;
459 index = mxf_get_stream_index(s, klv);
461 return AVERROR_INVALIDDATA;
463 klv_decode_ber_length(pb);
464 orig_size = avio_rb64(pb);
465 if (orig_size < plaintext_size)
466 return AVERROR_INVALIDDATA;
468 size = klv_decode_ber_length(pb);
469 if (size < 32 || size - 32 < orig_size)
470 return AVERROR_INVALIDDATA;
471 avio_read(pb, ivec, 16);
472 avio_read(pb, tmpbuf, 16);
474 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
475 if (memcmp(tmpbuf, checkv, 16))
476 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
478 size = av_get_packet(pb, pkt, size);
481 else if (size < plaintext_size)
482 return AVERROR_INVALIDDATA;
483 size -= plaintext_size;
485 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
486 &pkt->data[plaintext_size], size >> 4, ivec, 1);
487 av_shrink_packet(pkt, orig_size);
488 pkt->stream_index = index;
489 avio_skip(pb, end - avio_tell(pb));
493 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
495 MXFContext *mxf = arg;
496 int item_num = avio_rb32(pb);
497 int item_len = avio_rb32(pb);
499 if (item_len != 18) {
500 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
501 return AVERROR_PATCHWELCOME;
503 if (item_num > 65536 || item_num < 0) {
504 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
505 return AVERROR_INVALIDDATA;
508 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
509 av_free(mxf->local_tags);
510 mxf->local_tags_count = 0;
511 mxf->local_tags = av_calloc(item_num, item_len);
512 if (!mxf->local_tags)
513 return AVERROR(ENOMEM);
514 mxf->local_tags_count = item_num;
515 avio_read(pb, mxf->local_tags, item_num*item_len);
519 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
521 MXFContext *mxf = arg;
522 MXFPartition *partition, *tmp_part;
524 uint64_t footer_partition;
525 uint32_t nb_essence_containers;
527 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
529 return AVERROR(ENOMEM);
530 mxf->partitions = tmp_part;
532 if (mxf->parsing_backward) {
533 /* insert the new partition pack in the middle
534 * this makes the entries in mxf->partitions sorted by offset */
535 memmove(&mxf->partitions[mxf->last_forward_partition+1],
536 &mxf->partitions[mxf->last_forward_partition],
537 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
538 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
540 mxf->last_forward_partition++;
541 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
544 memset(partition, 0, sizeof(*partition));
545 mxf->partitions_count++;
546 partition->pack_length = avio_tell(pb) - klv_offset + size;
547 partition->pack_ofs = klv_offset;
551 partition->type = Header;
554 partition->type = BodyPartition;
557 partition->type = Footer;
560 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
561 return AVERROR_INVALIDDATA;
564 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
565 partition->closed = partition->type == Footer || !(uid[14] & 1);
566 partition->complete = uid[14] > 2;
568 partition->kag_size = avio_rb32(pb);
569 partition->this_partition = avio_rb64(pb);
570 partition->previous_partition = avio_rb64(pb);
571 footer_partition = avio_rb64(pb);
572 partition->header_byte_count = avio_rb64(pb);
573 partition->index_byte_count = avio_rb64(pb);
574 partition->index_sid = avio_rb32(pb);
576 partition->body_sid = avio_rb32(pb);
577 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
578 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
579 return AVERROR_INVALIDDATA;
581 nb_essence_containers = avio_rb32(pb);
583 if (partition->this_partition &&
584 partition->previous_partition == partition->this_partition) {
585 av_log(mxf->fc, AV_LOG_ERROR,
586 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
587 partition->previous_partition);
588 /* override with the actual previous partition offset */
589 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
591 mxf->partitions + mxf->last_forward_partition - 2;
592 partition->previous_partition = prev->this_partition;
594 /* if no previous body partition are found point to the header
596 if (partition->previous_partition == partition->this_partition)
597 partition->previous_partition = 0;
598 av_log(mxf->fc, AV_LOG_ERROR,
599 "Overriding PreviousPartition with %"PRIx64"\n",
600 partition->previous_partition);
603 /* some files don't have FooterPartition set in every partition */
604 if (footer_partition) {
605 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
606 av_log(mxf->fc, AV_LOG_ERROR,
607 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
608 mxf->footer_partition, footer_partition);
610 mxf->footer_partition = footer_partition;
614 av_log(mxf->fc, AV_LOG_TRACE,
615 "PartitionPack: ThisPartition = 0x%"PRIX64
616 ", PreviousPartition = 0x%"PRIX64", "
617 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
618 partition->this_partition,
619 partition->previous_partition, footer_partition,
620 partition->index_sid, partition->body_sid);
622 /* sanity check PreviousPartition if set */
623 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
624 if (partition->previous_partition &&
625 mxf->run_in + partition->previous_partition >= klv_offset) {
626 av_log(mxf->fc, AV_LOG_ERROR,
627 "PreviousPartition points to this partition or forward\n");
628 return AVERROR_INVALIDDATA;
631 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
632 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
633 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
634 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
635 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
636 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
637 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
638 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
639 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
640 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
641 else if (op[12] == 0x10) {
642 /* SMPTE 390m: "There shall be exactly one essence container"
643 * The following block deals with files that violate this, namely:
644 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
645 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
646 if (nb_essence_containers != 1) {
647 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
651 av_log(mxf->fc, AV_LOG_WARNING,
652 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
653 nb_essence_containers,
654 op == OP1a ? "OP1a" : "OPAtom");
660 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
664 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
665 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
666 partition->kag_size);
668 if (mxf->op == OPSONYOpt)
669 partition->kag_size = 512;
671 partition->kag_size = 1;
673 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
679 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
681 MXFMetadataSet **tmp;
683 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
685 return AVERROR(ENOMEM);
686 mxf->metadata_sets = tmp;
687 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
688 mxf->metadata_sets_count++;
692 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
694 MXFCryptoContext *cryptocontext = arg;
696 return AVERROR_INVALIDDATA;
697 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
698 avio_read(pb, cryptocontext->source_container_ul, 16);
702 static int mxf_read_strong_ref_array(AVIOContext *pb, UID **refs, int *count)
704 *count = avio_rb32(pb);
705 *refs = av_calloc(*count, sizeof(UID));
708 return AVERROR(ENOMEM);
710 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
711 avio_read(pb, (uint8_t *)*refs, *count * sizeof(UID));
715 static inline int mxf_read_utf16_string(AVIOContext *pb, int size, char** str, int be)
720 if (size < 0 || size > INT_MAX/2)
721 return AVERROR(EINVAL);
723 buf_size = size + size / 2 + 1;
724 *str = av_malloc(buf_size);
726 return AVERROR(ENOMEM);
729 ret = avio_get_str16be(pb, size, *str, buf_size);
731 ret = avio_get_str16le(pb, size, *str, buf_size);
741 #define READ_STR16(type, big_endian) \
742 static int mxf_read_utf16 ## type ##_string(AVIOContext *pb, int size, char** str) \
744 return mxf_read_utf16_string(pb, size, str, big_endian); \
750 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
752 MXFContext *mxf = arg;
755 if (mxf->packages_refs)
756 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
757 av_free(mxf->packages_refs);
758 return mxf_read_strong_ref_array(pb, &mxf->packages_refs, &mxf->packages_count);
763 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
765 MXFStructuralComponent *source_clip = arg;
768 source_clip->duration = avio_rb64(pb);
771 source_clip->start_position = avio_rb64(pb);
774 /* UMID, only get last 16 bytes */
775 avio_read(pb, source_clip->source_package_ul, 16);
776 avio_read(pb, source_clip->source_package_uid, 16);
779 source_clip->source_track_id = avio_rb32(pb);
785 static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
787 MXFTimecodeComponent *mxf_timecode = arg;
790 mxf_timecode->start_frame = avio_rb64(pb);
793 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
796 mxf_timecode->drop_frame = avio_r8(pb);
802 static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
804 MXFPulldownComponent *mxf_pulldown = arg;
807 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
813 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
815 MXFTrack *track = arg;
818 track->track_id = avio_rb32(pb);
821 avio_read(pb, track->track_number, 4);
824 mxf_read_utf16be_string(pb, size, &track->name);
827 track->edit_rate.num = avio_rb32(pb);
828 track->edit_rate.den = avio_rb32(pb);
831 avio_read(pb, track->sequence_ref, 16);
837 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
839 MXFSequence *sequence = arg;
842 sequence->duration = avio_rb64(pb);
845 avio_read(pb, sequence->data_definition_ul, 16);
848 sequence->origin = avio_r8(pb);
851 return mxf_read_strong_ref_array(pb, &sequence->structural_components_refs,
852 &sequence->structural_components_count);
857 static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
859 MXFEssenceGroup *essence_group = arg;
862 essence_group->duration = avio_rb64(pb);
865 return mxf_read_strong_ref_array(pb, &essence_group->structural_components_refs,
866 &essence_group->structural_components_count);
871 static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
873 MXFPackage *package = arg;
876 return mxf_read_strong_ref_array(pb, &package->tracks_refs,
877 &package->tracks_count);
880 avio_read(pb, package->package_ul, 16);
881 avio_read(pb, package->package_uid, 16);
884 avio_read(pb, package->descriptor_ref, 16);
887 return mxf_read_utf16be_string(pb, size, &package->name);
889 return mxf_read_strong_ref_array(pb, &package->comment_refs,
890 &package->comment_count);
895 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
899 segment->nb_index_entries = avio_rb32(pb);
901 length = avio_rb32(pb);
902 if(segment->nb_index_entries && length < 11)
903 return AVERROR_INVALIDDATA;
905 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
906 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
907 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries)))) {
908 av_freep(&segment->temporal_offset_entries);
909 av_freep(&segment->flag_entries);
910 return AVERROR(ENOMEM);
913 for (i = 0; i < segment->nb_index_entries; i++) {
915 return AVERROR_INVALIDDATA;
916 segment->temporal_offset_entries[i] = avio_r8(pb);
917 avio_r8(pb); /* KeyFrameOffset */
918 segment->flag_entries[i] = avio_r8(pb);
919 segment->stream_offset_entries[i] = avio_rb64(pb);
920 avio_skip(pb, length - 11);
925 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
927 MXFIndexTableSegment *segment = arg;
930 segment->edit_unit_byte_count = avio_rb32(pb);
931 av_log(NULL, AV_LOG_TRACE, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
934 segment->index_sid = avio_rb32(pb);
935 av_log(NULL, AV_LOG_TRACE, "IndexSID %d\n", segment->index_sid);
938 segment->body_sid = avio_rb32(pb);
939 av_log(NULL, AV_LOG_TRACE, "BodySID %d\n", segment->body_sid);
942 av_log(NULL, AV_LOG_TRACE, "IndexEntryArray found\n");
943 return mxf_read_index_entry_array(pb, segment);
945 segment->index_edit_rate.num = avio_rb32(pb);
946 segment->index_edit_rate.den = avio_rb32(pb);
947 av_log(NULL, AV_LOG_TRACE, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
948 segment->index_edit_rate.den);
951 segment->index_start_position = avio_rb64(pb);
952 av_log(NULL, AV_LOG_TRACE, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
955 segment->index_duration = avio_rb64(pb);
956 av_log(NULL, AV_LOG_TRACE, "IndexDuration %"PRId64"\n", segment->index_duration);
962 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
964 int code, value, ofs = 0;
965 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
970 av_log(NULL, AV_LOG_TRACE, "pixel layout: code %#x\n", code);
973 layout[ofs++] = code;
974 layout[ofs++] = value;
976 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
977 } while (code != 0); /* SMPTE 377M E.2.46 */
979 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
982 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
984 MXFDescriptor *descriptor = arg;
985 int entry_count, entry_size;
989 return mxf_read_strong_ref_array(pb, &descriptor->sub_descriptors_refs,
990 &descriptor->sub_descriptors_count);
991 case 0x3002: /* ContainerDuration */
992 descriptor->duration = avio_rb64(pb);
995 avio_read(pb, descriptor->essence_container_ul, 16);
998 avio_read(pb, descriptor->codec_ul, 16);
1001 descriptor->linked_track_id = avio_rb32(pb);
1003 case 0x3201: /* PictureEssenceCoding */
1004 avio_read(pb, descriptor->essence_codec_ul, 16);
1007 descriptor->width = avio_rb32(pb);
1010 descriptor->height = avio_rb32(pb);
1013 descriptor->frame_layout = avio_r8(pb);
1016 entry_count = avio_rb32(pb);
1017 entry_size = avio_rb32(pb);
1018 if (entry_size == 4) {
1019 if (entry_count > 0)
1020 descriptor->video_line_map[0] = avio_rb32(pb);
1022 descriptor->video_line_map[0] = 0;
1023 if (entry_count > 1)
1024 descriptor->video_line_map[1] = avio_rb32(pb);
1026 descriptor->video_line_map[1] = 0;
1028 av_log(NULL, AV_LOG_WARNING, "VideoLineMap element size %d currently not supported\n", entry_size);
1031 descriptor->aspect_ratio.num = avio_rb32(pb);
1032 descriptor->aspect_ratio.den = avio_rb32(pb);
1035 descriptor->field_dominance = avio_r8(pb);
1038 descriptor->component_depth = avio_rb32(pb);
1041 descriptor->horiz_subsampling = avio_rb32(pb);
1044 descriptor->vert_subsampling = avio_rb32(pb);
1047 descriptor->sample_rate.num = avio_rb32(pb);
1048 descriptor->sample_rate.den = avio_rb32(pb);
1050 case 0x3D06: /* SoundEssenceCompression */
1051 avio_read(pb, descriptor->essence_codec_ul, 16);
1054 descriptor->channels = avio_rb32(pb);
1057 descriptor->bits_per_sample = avio_rb32(pb);
1060 mxf_read_pixel_layout(pb, descriptor);
1063 /* Private uid used by SONY C0023S01.mxf */
1064 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
1065 if (descriptor->extradata)
1066 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
1067 av_free(descriptor->extradata);
1068 descriptor->extradata_size = 0;
1069 descriptor->extradata = av_malloc(size);
1070 if (!descriptor->extradata)
1071 return AVERROR(ENOMEM);
1072 descriptor->extradata_size = size;
1073 avio_read(pb, descriptor->extradata, size);
1075 if (IS_KLV_KEY(uid, mxf_jp2k_rsiz)) {
1076 uint32_t rsiz = avio_rb16(pb);
1077 if (rsiz == FF_PROFILE_JPEG2000_DCINEMA_2K ||
1078 rsiz == FF_PROFILE_JPEG2000_DCINEMA_4K)
1079 descriptor->pix_fmt = AV_PIX_FMT_XYZ12;
1086 static int mxf_read_indirect_value(void *arg, AVIOContext *pb, int size)
1088 MXFTaggedValue *tagged_value = arg;
1094 avio_read(pb, key, 17);
1095 /* TODO: handle other types of of indirect values */
1096 if (memcmp(key, mxf_indirect_value_utf16le, 17) == 0) {
1097 return mxf_read_utf16le_string(pb, size - 17, &tagged_value->value);
1098 } else if (memcmp(key, mxf_indirect_value_utf16be, 17) == 0) {
1099 return mxf_read_utf16be_string(pb, size - 17, &tagged_value->value);
1104 static int mxf_read_tagged_value(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
1106 MXFTaggedValue *tagged_value = arg;
1109 return mxf_read_utf16be_string(pb, size, &tagged_value->name);
1111 return mxf_read_indirect_value(tagged_value, pb, size);
1117 * Match an uid independently of the version byte and up to len common bytes
1120 static int mxf_match_uid(const UID key, const UID uid, int len)
1123 for (i = 0; i < len; i++) {
1124 if (i != 7 && key[i] != uid[i])
1130 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1132 while (uls->uid[0]) {
1133 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1140 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1146 for (i = 0; i < mxf->metadata_sets_count; i++) {
1147 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1148 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1149 return mxf->metadata_sets[i];
1155 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1156 // video essence container uls
1157 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0c,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 },
1158 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x10,0x60,0x01 }, 14, AV_CODEC_ID_H264 }, /* H.264 frame wrapped */
1159 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x02,0x0d,0x01,0x03,0x01,0x02,0x12,0x01,0x00 }, 14, AV_CODEC_ID_VC1 }, /* VC-1 frame wrapped */
1160 { { 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 */
1161 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x01,0x04,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* Type D-10 mapping of 40Mbps 525/60-I */
1162 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1163 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* uncompressed picture */
1164 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x01,0x01 }, 15, AV_CODEC_ID_HQ_HQA },
1165 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0a,0x0e,0x0f,0x03,0x01,0x02,0x20,0x02,0x01 }, 15, AV_CODEC_ID_HQX },
1166 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1167 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1170 /* EC ULs for intra-only formats */
1171 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1172 { { 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 */
1173 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1176 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1177 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1178 { { 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 */
1179 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG 2000 code stream */
1180 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1183 /* actual coded width for AVC-Intra to allow selecting correct SPS/PPS */
1184 static const MXFCodecUL mxf_intra_only_picture_coded_width[] = {
1185 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x01 }, 16, 1440 },
1186 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x02 }, 16, 1440 },
1187 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x03 }, 16, 1440 },
1188 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x21,0x04 }, 16, 1440 },
1189 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, 0 },
1192 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1193 // sound essence container uls
1194 { { 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 */
1195 { { 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 */
1196 { { 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 */
1197 { { 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 */
1198 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG-2 AAC ADTS (legacy) */
1199 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1202 static const MXFCodecUL mxf_data_essence_container_uls[] = {
1203 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1204 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1207 static const char * const mxf_data_essence_descriptor[] = {
1208 "vbi_vanc_smpte_436M",
1211 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1213 int i, j, nb_segments = 0;
1214 MXFIndexTableSegment **unsorted_segments;
1215 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1217 /* count number of segments, allocate arrays and copy unsorted segments */
1218 for (i = 0; i < mxf->metadata_sets_count; i++)
1219 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1223 return AVERROR_INVALIDDATA;
1225 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1226 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1227 av_freep(sorted_segments);
1228 av_free(unsorted_segments);
1229 return AVERROR(ENOMEM);
1232 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1233 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1234 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1236 *nb_sorted_segments = 0;
1238 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1239 for (i = 0; i < nb_segments; i++) {
1240 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1241 uint64_t best_index_duration = 0;
1243 for (j = 0; j < nb_segments; j++) {
1244 MXFIndexTableSegment *s = unsorted_segments[j];
1246 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1247 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1248 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1250 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1251 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1252 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1254 best_body_sid = s->body_sid;
1255 best_index_sid = s->index_sid;
1256 best_index_start = s->index_start_position;
1257 best_index_duration = s->index_duration;
1261 /* no suitable entry found -> we're done */
1265 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1266 last_body_sid = best_body_sid;
1267 last_index_sid = best_index_sid;
1268 last_index_start = best_index_start;
1271 av_free(unsorted_segments);
1277 * Computes the absolute file offset of the given essence container offset
1279 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1282 int64_t offset_in = offset; /* for logging */
1284 for (x = 0; x < mxf->partitions_count; x++) {
1285 MXFPartition *p = &mxf->partitions[x];
1287 if (p->body_sid != body_sid)
1290 if (offset < p->essence_length || !p->essence_length) {
1291 *offset_out = p->essence_offset + offset;
1295 offset -= p->essence_length;
1298 av_log(mxf->fc, AV_LOG_ERROR,
1299 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1300 offset_in, body_sid);
1302 return AVERROR_INVALIDDATA;
1306 * Returns the end position of the essence container with given BodySID, or zero if unknown
1308 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1313 for (x = 0; x < mxf->partitions_count; x++) {
1314 MXFPartition *p = &mxf->partitions[x];
1316 if (p->body_sid != body_sid)
1319 if (!p->essence_length)
1322 ret = p->essence_offset + p->essence_length;
1328 /* EditUnit -> absolute offset */
1329 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)
1332 int64_t offset_temp = 0;
1334 for (i = 0; i < index_table->nb_segments; i++) {
1335 MXFIndexTableSegment *s = index_table->segments[i];
1337 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1339 if (edit_unit < s->index_start_position + s->index_duration) {
1340 int64_t index = edit_unit - s->index_start_position;
1342 if (s->edit_unit_byte_count)
1343 offset_temp += s->edit_unit_byte_count * index;
1344 else if (s->nb_index_entries) {
1345 if (s->nb_index_entries == 2 * s->index_duration + 1)
1346 index *= 2; /* Avid index */
1348 if (index < 0 || index >= s->nb_index_entries) {
1349 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1350 index_table->index_sid, s->index_start_position);
1351 return AVERROR_INVALIDDATA;
1354 offset_temp = s->stream_offset_entries[index];
1356 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1357 index_table->index_sid, s->index_start_position);
1358 return AVERROR_INVALIDDATA;
1362 *edit_unit_out = edit_unit;
1364 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1366 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1367 offset_temp += s->edit_unit_byte_count * s->index_duration;
1372 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);
1374 return AVERROR_INVALIDDATA;
1377 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1380 int8_t max_temporal_offset = -128;
1383 /* first compute how many entries we have */
1384 for (i = 0; i < index_table->nb_segments; i++) {
1385 MXFIndexTableSegment *s = index_table->segments[i];
1387 if (!s->nb_index_entries) {
1388 index_table->nb_ptses = 0;
1389 return 0; /* no TemporalOffsets */
1392 index_table->nb_ptses += s->index_duration;
1395 /* paranoid check */
1396 if (index_table->nb_ptses <= 0)
1399 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1400 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry))) ||
1401 !(index_table->offsets = av_calloc(index_table->nb_ptses, sizeof(int8_t))) ||
1402 !(flags = av_calloc(index_table->nb_ptses, sizeof(uint8_t)))) {
1403 av_freep(&index_table->ptses);
1404 av_freep(&index_table->fake_index);
1405 av_freep(&index_table->offsets);
1406 return AVERROR(ENOMEM);
1409 /* we may have a few bad TemporalOffsets
1410 * make sure the corresponding PTSes don't have the bogus value 0 */
1411 for (x = 0; x < index_table->nb_ptses; x++)
1412 index_table->ptses[x] = AV_NOPTS_VALUE;
1426 * We want to transform it into this:
1437 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1438 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1439 * The latter makes DTS <= PTS.
1441 for (i = x = 0; i < index_table->nb_segments; i++) {
1442 MXFIndexTableSegment *s = index_table->segments[i];
1443 int index_delta = 1;
1444 int n = s->nb_index_entries;
1446 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1447 index_delta = 2; /* Avid index */
1448 /* ignore the last entry - it's the size of the essence container */
1452 for (j = 0; j < n; j += index_delta, x++) {
1453 int offset = s->temporal_offset_entries[j] / index_delta;
1454 int index = x + offset;
1456 if (x >= index_table->nb_ptses) {
1457 av_log(mxf->fc, AV_LOG_ERROR,
1458 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1459 s->nb_index_entries, s->index_duration);
1463 flags[x] = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1465 if (index < 0 || index >= index_table->nb_ptses) {
1466 av_log(mxf->fc, AV_LOG_ERROR,
1467 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1472 index_table->offsets[x] = offset;
1473 index_table->ptses[index] = x;
1474 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1478 /* calculate the fake index table in display order */
1479 for (x = 0; x < index_table->nb_ptses; x++) {
1480 index_table->fake_index[x].timestamp = x;
1481 if (index_table->ptses[x] != AV_NOPTS_VALUE)
1482 index_table->fake_index[index_table->ptses[x]].flags = flags[x];
1486 index_table->first_dts = -max_temporal_offset;
1492 * Sorts and collects index table segments into index tables.
1493 * Also computes PTSes if possible.
1495 static int mxf_compute_index_tables(MXFContext *mxf)
1497 int i, j, k, ret, nb_sorted_segments;
1498 MXFIndexTableSegment **sorted_segments = NULL;
1499 AVStream *st = NULL;
1501 for (i = 0; i < mxf->fc->nb_streams; i++) {
1502 if (mxf->fc->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_DATA)
1504 st = mxf->fc->streams[i];
1508 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1509 nb_sorted_segments <= 0) {
1510 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1514 /* sanity check and count unique BodySIDs/IndexSIDs */
1515 for (i = 0; i < nb_sorted_segments; i++) {
1516 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1517 mxf->nb_index_tables++;
1518 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1519 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1520 ret = AVERROR_INVALIDDATA;
1521 goto finish_decoding_index;
1525 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1526 sizeof(*mxf->index_tables));
1527 if (!mxf->index_tables) {
1528 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1529 ret = AVERROR(ENOMEM);
1530 goto finish_decoding_index;
1533 /* distribute sorted segments to index tables */
1534 for (i = j = 0; i < nb_sorted_segments; i++) {
1535 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1540 mxf->index_tables[j].nb_segments++;
1543 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1544 MXFIndexTable *t = &mxf->index_tables[j];
1546 t->segments = av_mallocz_array(t->nb_segments,
1547 sizeof(*t->segments));
1550 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1551 " pointer array\n");
1552 ret = AVERROR(ENOMEM);
1553 goto finish_decoding_index;
1556 if (sorted_segments[i]->index_start_position)
1557 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1558 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1560 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1561 t->index_sid = sorted_segments[i]->index_sid;
1562 t->body_sid = sorted_segments[i]->body_sid;
1564 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1565 goto finish_decoding_index;
1567 /* fix zero IndexDurations */
1568 for (k = 0; k < t->nb_segments; k++) {
1569 if (t->segments[k]->index_duration)
1572 if (t->nb_segments > 1)
1573 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1577 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1581 /* assume the first stream's duration is reasonable
1582 * leave index_duration = 0 on further segments in case we have any (unlikely)
1584 t->segments[k]->index_duration = st->duration;
1590 finish_decoding_index:
1591 av_free(sorted_segments);
1595 static int mxf_is_intra_only(MXFDescriptor *descriptor)
1597 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1598 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1599 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1600 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1603 static int mxf_uid_to_str(UID uid, char **str)
1607 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1609 return AVERROR(ENOMEM);
1610 for (i = 0; i < sizeof(UID); i++) {
1611 snprintf(p, 2 + 1, "%.2x", uid[i]);
1613 if (i == 3 || i == 5 || i == 7 || i == 9) {
1614 snprintf(p, 1 + 1, "-");
1621 static int mxf_umid_to_str(UID ul, UID uid, char **str)
1625 p = *str = av_mallocz(sizeof(UID) * 4 + 2 + 1);
1627 return AVERROR(ENOMEM);
1628 snprintf(p, 2 + 1, "0x");
1630 for (i = 0; i < sizeof(UID); i++) {
1631 snprintf(p, 2 + 1, "%.2X", ul[i]);
1635 for (i = 0; i < sizeof(UID); i++) {
1636 snprintf(p, 2 + 1, "%.2X", uid[i]);
1642 static int mxf_add_umid_metadata(AVDictionary **pm, const char *key, MXFPackage* package)
1648 if ((ret = mxf_umid_to_str(package->package_ul, package->package_uid, &str)) < 0)
1650 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1654 static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1656 char buf[AV_TIMECODE_STR_SIZE];
1657 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1662 static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1664 MXFStructuralComponent *component = NULL;
1665 MXFPulldownComponent *pulldown = NULL;
1667 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1671 switch (component->type) {
1672 case TimecodeComponent:
1673 return (MXFTimecodeComponent*)component;
1674 case PulldownComponent: /* timcode component may be located on a pulldown component */
1675 pulldown = (MXFPulldownComponent*)component;
1676 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1683 static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1685 MXFPackage *package = NULL;
1688 for (i = 0; i < mxf->packages_count; i++) {
1689 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1693 if (!memcmp(package->package_uid, package_uid, 16))
1699 static MXFDescriptor* mxf_resolve_multidescriptor(MXFContext *mxf, MXFDescriptor *descriptor, int track_id)
1701 MXFDescriptor *sub_descriptor = NULL;
1707 if (descriptor->type == MultipleDescriptor) {
1708 for (i = 0; i < descriptor->sub_descriptors_count; i++) {
1709 sub_descriptor = mxf_resolve_strong_ref(mxf, &descriptor->sub_descriptors_refs[i], Descriptor);
1711 if (!sub_descriptor) {
1712 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1715 if (sub_descriptor->linked_track_id == track_id) {
1716 return sub_descriptor;
1719 } else if (descriptor->type == Descriptor)
1725 static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1727 MXFStructuralComponent *component = NULL;
1728 MXFPackage *package = NULL;
1729 MXFDescriptor *descriptor = NULL;
1732 if (!essence_group || !essence_group->structural_components_count)
1735 /* essence groups contains multiple representations of the same media,
1736 this return the first components with a valid Descriptor typically index 0 */
1737 for (i =0; i < essence_group->structural_components_count; i++){
1738 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1742 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1745 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1752 static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1754 MXFStructuralComponent *component = NULL;
1756 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1759 switch (component->type) {
1763 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1770 static int mxf_parse_package_comments(MXFContext *mxf, AVDictionary **pm, MXFPackage *package)
1772 MXFTaggedValue *tag;
1776 for (i = 0; i < package->comment_count; i++) {
1777 tag = mxf_resolve_strong_ref(mxf, &package->comment_refs[i], TaggedValue);
1778 if (!tag || !tag->name || !tag->value)
1781 size = strlen(tag->name) + 8 + 1;
1782 key = av_mallocz(size);
1784 return AVERROR(ENOMEM);
1786 snprintf(key, size, "comment_%s", tag->name);
1787 av_dict_set(pm, key, tag->value, AV_DICT_DONT_STRDUP_KEY);
1792 static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1794 MXFPackage *physical_package = NULL;
1795 MXFTrack *physical_track = NULL;
1796 MXFStructuralComponent *sourceclip = NULL;
1797 MXFTimecodeComponent *mxf_tc = NULL;
1801 int64_t start_position;
1803 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1804 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1808 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1811 mxf_add_umid_metadata(&st->metadata, "reel_umid", physical_package);
1813 /* the name of physical source package is name of the reel or tape */
1814 if (physical_package->name && physical_package->name[0])
1815 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1817 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1818 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1820 for (j = 0; j < physical_package->tracks_count; j++) {
1821 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1822 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1826 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1827 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1831 if (physical_track->edit_rate.num <= 0 ||
1832 physical_track->edit_rate.den <= 0) {
1833 av_log(mxf->fc, AV_LOG_WARNING,
1834 "Invalid edit rate (%d/%d) found on structural"
1835 " component #%d, defaulting to 25/1\n",
1836 physical_track->edit_rate.num,
1837 physical_track->edit_rate.den, i);
1838 physical_track->edit_rate = (AVRational){25, 1};
1841 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1842 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1845 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1846 /* scale sourceclip start_position to match physical track edit rate */
1847 start_position = av_rescale_q(sourceclip->start_position,
1848 physical_track->edit_rate,
1849 source_track->edit_rate);
1851 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1852 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1862 static int mxf_add_metadata_stream(MXFContext *mxf, MXFTrack *track)
1864 MXFStructuralComponent *component = NULL;
1865 const MXFCodecUL *codec_ul = NULL;
1866 MXFPackage tmp_package;
1870 for (j = 0; j < track->sequence->structural_components_count; j++) {
1871 component = mxf_resolve_sourceclip(mxf, &track->sequence->structural_components_refs[j]);
1879 st = avformat_new_stream(mxf->fc, NULL);
1881 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate metadata stream\n");
1882 return AVERROR(ENOMEM);
1885 st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
1886 st->codecpar->codec_id = AV_CODEC_ID_NONE;
1887 st->id = track->track_id;
1889 memcpy(&tmp_package.package_ul, component->source_package_ul, 16);
1890 memcpy(&tmp_package.package_uid, component->source_package_uid, 16);
1891 mxf_add_umid_metadata(&st->metadata, "file_package_umid", &tmp_package);
1892 if (track->name && track->name[0])
1893 av_dict_set(&st->metadata, "track_name", track->name, 0);
1895 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &track->sequence->data_definition_ul);
1896 av_dict_set(&st->metadata, "data_type", av_get_media_type_string(codec_ul->id), 0);
1900 static int mxf_parse_structural_metadata(MXFContext *mxf)
1902 MXFPackage *material_package = NULL;
1905 av_log(mxf->fc, AV_LOG_TRACE, "metadata sets count %d\n", mxf->metadata_sets_count);
1906 /* TODO: handle multiple material packages (OP3x) */
1907 for (i = 0; i < mxf->packages_count; i++) {
1908 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1909 if (material_package) break;
1911 if (!material_package) {
1912 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1913 return AVERROR_INVALIDDATA;
1916 mxf_add_umid_metadata(&mxf->fc->metadata, "material_package_umid", material_package);
1917 if (material_package->name && material_package->name[0])
1918 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1919 mxf_parse_package_comments(mxf, &mxf->fc->metadata, material_package);
1921 for (i = 0; i < material_package->tracks_count; i++) {
1922 MXFPackage *source_package = NULL;
1923 MXFTrack *material_track = NULL;
1924 MXFTrack *source_track = NULL;
1925 MXFTrack *temp_track = NULL;
1926 MXFDescriptor *descriptor = NULL;
1927 MXFStructuralComponent *component = NULL;
1928 MXFTimecodeComponent *mxf_tc = NULL;
1929 UID *essence_container_ul = NULL;
1930 const MXFCodecUL *codec_ul = NULL;
1931 const MXFCodecUL *container_ul = NULL;
1932 const MXFCodecUL *pix_fmt_ul = NULL;
1937 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1938 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1942 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1943 mxf_tc = (MXFTimecodeComponent*)component;
1944 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1945 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1946 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1950 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1951 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1955 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1956 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1960 mxf_tc = (MXFTimecodeComponent*)component;
1961 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1962 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1963 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1968 /* TODO: handle multiple source clips, only finds first valid source clip */
1969 if(material_track->sequence->structural_components_count > 1)
1970 av_log(mxf->fc, AV_LOG_WARNING, "material track %d: has %d components\n",
1971 material_track->track_id, material_track->sequence->structural_components_count);
1973 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1974 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1978 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1979 if (!source_package) {
1980 av_log(mxf->fc, AV_LOG_TRACE, "material track %d: no corresponding source package found\n", material_track->track_id);
1983 for (k = 0; k < source_package->tracks_count; k++) {
1984 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1985 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1986 ret = AVERROR_INVALIDDATA;
1989 if (temp_track->track_id == component->source_track_id) {
1990 source_track = temp_track;
1994 if (!source_track) {
1995 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1998 if(source_track && component)
2001 if (!source_track || !component || !source_package) {
2002 if((ret = mxf_add_metadata_stream(mxf, material_track)))
2007 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
2008 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
2009 ret = AVERROR_INVALIDDATA;
2013 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
2014 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
2015 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
2016 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
2020 st = avformat_new_stream(mxf->fc, NULL);
2022 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
2023 ret = AVERROR(ENOMEM);
2026 st->id = material_track->track_id;
2027 st->priv_data = source_track;
2029 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
2030 descriptor = mxf_resolve_multidescriptor(mxf, source_package->descriptor, source_track->track_id);
2032 /* A SourceClip from a EssenceGroup may only be a single frame of essence data. The clips duration is then how many
2033 * frames its suppose to repeat for. Descriptor->duration, if present, contains the real duration of the essence data */
2034 if (descriptor && descriptor->duration != AV_NOPTS_VALUE)
2035 source_track->original_duration = st->duration = FFMIN(descriptor->duration, component->duration);
2037 source_track->original_duration = st->duration = component->duration;
2039 if (st->duration == -1)
2040 st->duration = AV_NOPTS_VALUE;
2041 st->start_time = component->start_position;
2042 if (material_track->edit_rate.num <= 0 ||
2043 material_track->edit_rate.den <= 0) {
2044 av_log(mxf->fc, AV_LOG_WARNING,
2045 "Invalid edit rate (%d/%d) found on stream #%d, "
2046 "defaulting to 25/1\n",
2047 material_track->edit_rate.num,
2048 material_track->edit_rate.den, st->index);
2049 material_track->edit_rate = (AVRational){25, 1};
2051 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
2053 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
2054 * the former is accessible via st->priv_data */
2055 source_track->edit_rate = material_track->edit_rate;
2057 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
2058 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
2059 st->codecpar->codec_type = codec_ul->id;
2062 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
2065 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
2066 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
2067 essence_container_ul = &descriptor->essence_container_ul;
2068 /* HACK: replacing the original key with mxf_encrypted_essence_container
2069 * is not allowed according to s429-6, try to find correct information anyway */
2070 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
2071 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
2072 for (k = 0; k < mxf->metadata_sets_count; k++) {
2073 MXFMetadataSet *metadata = mxf->metadata_sets[k];
2074 if (metadata->type == CryptoContext) {
2075 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
2081 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
2082 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
2083 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2084 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
2085 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->codec_ul);
2086 st->codecpar->codec_id = (enum AVCodecID)codec_ul->id;
2089 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
2090 avcodec_get_name(st->codecpar->codec_id));
2091 for (k = 0; k < 16; k++) {
2092 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
2093 descriptor->essence_codec_ul[k]);
2094 if (!(k+1 & 19) || k == 5)
2095 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
2097 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
2099 mxf_add_umid_metadata(&st->metadata, "file_package_umid", source_package);
2100 if (source_package->name && source_package->name[0])
2101 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
2102 if (material_track->name && material_track->name[0])
2103 av_dict_set(&st->metadata, "track_name", material_track->name, 0);
2105 mxf_parse_physical_source_package(mxf, source_track, st);
2107 if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
2108 source_track->intra_only = mxf_is_intra_only(descriptor);
2109 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
2110 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
2111 st->codecpar->codec_id = container_ul->id;
2112 st->codecpar->width = descriptor->width;
2113 st->codecpar->height = descriptor->height; /* Field height, not frame height */
2114 switch (descriptor->frame_layout) {
2116 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2119 /* Every other line is stored and needs to be duplicated. */
2120 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
2121 break; /* The correct thing to do here is fall through, but by breaking we might be
2122 able to decode some streams at half the vertical resolution, rather than not al all.
2123 It's also for compatibility with the old behavior. */
2126 case SegmentedFrame:
2127 st->codecpar->field_order = AV_FIELD_PROGRESSIVE;
2128 case SeparateFields:
2129 av_log(mxf->fc, AV_LOG_DEBUG, "video_line_map: (%d, %d), field_dominance: %d\n",
2130 descriptor->video_line_map[0], descriptor->video_line_map[1],
2131 descriptor->field_dominance);
2132 if ((descriptor->video_line_map[0] > 0) && (descriptor->video_line_map[1] > 0)) {
2133 /* Detect coded field order from VideoLineMap:
2134 * (even, even) => bottom field coded first
2135 * (even, odd) => top field coded first
2136 * (odd, even) => top field coded first
2137 * (odd, odd) => bottom field coded first
2139 if ((descriptor->video_line_map[0] + descriptor->video_line_map[1]) % 2) {
2140 switch (descriptor->field_dominance) {
2141 case MXF_FIELD_DOMINANCE_DEFAULT:
2142 case MXF_FIELD_DOMINANCE_FF:
2143 st->codecpar->field_order = AV_FIELD_TT;
2145 case MXF_FIELD_DOMINANCE_FL:
2146 st->codecpar->field_order = AV_FIELD_TB;
2149 avpriv_request_sample(mxf->fc,
2150 "Field dominance %d support",
2151 descriptor->field_dominance);
2154 switch (descriptor->field_dominance) {
2155 case MXF_FIELD_DOMINANCE_DEFAULT:
2156 case MXF_FIELD_DOMINANCE_FF:
2157 st->codecpar->field_order = AV_FIELD_BB;
2159 case MXF_FIELD_DOMINANCE_FL:
2160 st->codecpar->field_order = AV_FIELD_BT;
2163 avpriv_request_sample(mxf->fc,
2164 "Field dominance %d support",
2165 descriptor->field_dominance);
2169 /* Turn field height into frame height. */
2170 st->codecpar->height *= 2;
2173 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
2175 if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
2176 st->codecpar->format = descriptor->pix_fmt;
2177 if (st->codecpar->format == AV_PIX_FMT_NONE) {
2178 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
2179 &descriptor->essence_codec_ul);
2180 st->codecpar->format = (enum AVPixelFormat)pix_fmt_ul->id;
2181 if (st->codecpar->format== AV_PIX_FMT_NONE) {
2182 st->codecpar->codec_tag = mxf_get_codec_ul(ff_mxf_codec_tag_uls,
2183 &descriptor->essence_codec_ul)->id;
2184 if (!st->codecpar->codec_tag) {
2185 /* support files created before RP224v10 by defaulting to UYVY422
2186 if subsampling is 4:2:2 and component depth is 8-bit */
2187 if (descriptor->horiz_subsampling == 2 &&
2188 descriptor->vert_subsampling == 1 &&
2189 descriptor->component_depth == 8) {
2190 st->codecpar->format = AV_PIX_FMT_UYVY422;
2196 st->need_parsing = AVSTREAM_PARSE_HEADERS;
2197 if (material_track->sequence->origin) {
2198 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
2200 if (source_track->sequence->origin) {
2201 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
2203 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
2204 st->display_aspect_ratio = descriptor->aspect_ratio;
2205 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
2206 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
2207 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
2208 if (st->codecpar->codec_id == AV_CODEC_ID_NONE || (st->codecpar->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
2209 st->codecpar->codec_id = (enum AVCodecID)container_ul->id;
2210 st->codecpar->channels = descriptor->channels;
2211 st->codecpar->bits_per_coded_sample = descriptor->bits_per_sample;
2213 if (descriptor->sample_rate.den > 0) {
2214 st->codecpar->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
2215 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
2217 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
2218 "found for stream #%d, time base forced to 1/48000\n",
2219 descriptor->sample_rate.num, descriptor->sample_rate.den,
2221 avpriv_set_pts_info(st, 64, 1, 48000);
2224 /* if duration is set, rescale it from EditRate to SampleRate */
2225 if (st->duration != AV_NOPTS_VALUE)
2226 st->duration = av_rescale_q(st->duration,
2227 av_inv_q(material_track->edit_rate),
2230 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
2231 if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE) {
2232 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2233 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24LE;
2234 else if (descriptor->bits_per_sample == 32)
2235 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE;
2236 } else if (st->codecpar->codec_id == AV_CODEC_ID_PCM_S16BE) {
2237 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
2238 st->codecpar->codec_id = AV_CODEC_ID_PCM_S24BE;
2239 else if (descriptor->bits_per_sample == 32)
2240 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
2241 } else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
2242 st->need_parsing = AVSTREAM_PARSE_FULL;
2244 } else if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA) {
2245 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
2246 essence_container_ul)->id;
2247 if (codec_id >= 0 &&
2248 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
2249 av_dict_set(&st->metadata, "data_type",
2250 mxf_data_essence_descriptor[codec_id], 0);
2253 if (descriptor->extradata) {
2254 if (!ff_alloc_extradata(st->codecpar, descriptor->extradata_size)) {
2255 memcpy(st->codecpar->extradata, descriptor->extradata, descriptor->extradata_size);
2257 } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
2258 int coded_width = mxf_get_codec_ul(mxf_intra_only_picture_coded_width,
2259 &descriptor->essence_codec_ul)->id;
2261 st->codecpar->width = coded_width;
2262 ret = ff_generate_avci_extradata(st);
2266 if (st->codecpar->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
2267 /* TODO: decode timestamps */
2268 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
2277 static int64_t mxf_timestamp_to_int64(uint64_t timestamp)
2279 struct tm time = { 0 };
2280 time.tm_year = (timestamp >> 48) - 1900;
2281 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
2282 time.tm_mday = (timestamp >> 32 & 0xFF);
2283 time.tm_hour = (timestamp >> 24 & 0xFF);
2284 time.tm_min = (timestamp >> 16 & 0xFF);
2285 time.tm_sec = (timestamp >> 8 & 0xFF);
2287 /* msvcrt versions of strftime calls the invalid parameter handler
2288 * (aborting the process if one isn't set) if the parameters are out
2290 time.tm_mon = av_clip(time.tm_mon, 0, 11);
2291 time.tm_mday = av_clip(time.tm_mday, 1, 31);
2292 time.tm_hour = av_clip(time.tm_hour, 0, 23);
2293 time.tm_min = av_clip(time.tm_min, 0, 59);
2294 time.tm_sec = av_clip(time.tm_sec, 0, 59);
2296 return (int64_t)av_timegm(&time) * 1000000;
2299 #define SET_STR_METADATA(pb, name, str) do { \
2300 if ((ret = mxf_read_utf16be_string(pb, size, &str)) < 0) \
2302 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2305 #define SET_UID_METADATA(pb, name, var, str) do { \
2306 avio_read(pb, var, 16); \
2307 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
2309 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2312 #define SET_TS_METADATA(pb, name, var, str) do { \
2313 var = avio_rb64(pb); \
2314 if ((ret = avpriv_dict_set_timestamp(&s->metadata, name, mxf_timestamp_to_int64(var)) < 0)) \
2318 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2320 MXFContext *mxf = arg;
2321 AVFormatContext *s = mxf->fc;
2328 SET_STR_METADATA(pb, "company_name", str);
2331 SET_STR_METADATA(pb, "product_name", str);
2334 SET_STR_METADATA(pb, "product_version", str);
2337 SET_UID_METADATA(pb, "product_uid", uid, str);
2340 SET_TS_METADATA(pb, "modification_date", ts, str);
2343 SET_STR_METADATA(pb, "application_platform", str);
2346 SET_UID_METADATA(pb, "generation_uid", uid, str);
2349 SET_UID_METADATA(pb, "uid", uid, str);
2355 static int mxf_read_preface_metadata(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
2357 MXFContext *mxf = arg;
2358 AVFormatContext *s = mxf->fc;
2362 if (tag >= 0x8000 && (IS_KLV_KEY(uid, mxf_avid_project_name))) {
2363 SET_STR_METADATA(pb, "project_name", str);
2368 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2369 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2370 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2371 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2372 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2373 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2374 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2375 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2376 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2377 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2378 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2379 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2380 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_metadata },
2381 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2382 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2383 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2384 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2385 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2386 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2387 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2388 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3f,0x00 }, mxf_read_tagged_value, sizeof(MXFTaggedValue), TaggedValue },
2389 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2390 { { 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 */
2391 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2392 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2393 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2394 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2395 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2396 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5c,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VANC/VBI - SMPTE 436M */
2397 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2398 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2399 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2400 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2401 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2402 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2403 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2404 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2407 static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2410 case MultipleDescriptor:
2412 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2413 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2421 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2423 AVIOContext *pb = mxf->fc->pb;
2424 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2425 uint64_t klv_end = avio_tell(pb) + klv->length;
2428 return AVERROR(ENOMEM);
2429 mxf_metadataset_init(ctx, type);
2430 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2432 int tag = avio_rb16(pb);
2433 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2434 uint64_t next = avio_tell(pb) + size;
2437 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x size %d\n", tag, size);
2438 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2439 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2442 if (tag > 0x7FFF) { /* dynamic tag */
2444 for (i = 0; i < mxf->local_tags_count; i++) {
2445 int local_tag = AV_RB16(mxf->local_tags+i*18);
2446 if (local_tag == tag) {
2447 memcpy(uid, mxf->local_tags+i*18+2, 16);
2448 av_log(mxf->fc, AV_LOG_TRACE, "local tag %#04x\n", local_tag);
2449 PRINT_KEY(mxf->fc, "uid", uid);
2453 if (ctx_size && tag == 0x3C0A) {
2454 avio_read(pb, ctx->uid, 16);
2455 } else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0) {
2456 mxf_free_metadataset(&ctx, !!ctx_size);
2460 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2461 * it extending past the end of the KLV though (zzuf5.mxf). */
2462 if (avio_tell(pb) > klv_end) {
2465 mxf_free_metadataset(&ctx, !!ctx_size);
2468 av_log(mxf->fc, AV_LOG_ERROR,
2469 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2471 return AVERROR_INVALIDDATA;
2472 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2473 avio_seek(pb, next, SEEK_SET);
2475 if (ctx_size) ctx->type = type;
2476 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2480 * Matches any partition pack key, in other words:
2484 * @return non-zero if the key is a partition pack key, zero otherwise
2486 static int mxf_is_partition_pack_key(UID key)
2488 //NOTE: this is a little lax since it doesn't constraint key[14]
2489 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2490 key[13] >= 2 && key[13] <= 4;
2494 * Parses a metadata KLV
2495 * @return <0 on error, 0 otherwise
2497 static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2498 int ctx_size, enum MXFMetadataSetType type)
2500 AVFormatContext *s = mxf->fc;
2502 if (klv.key[5] == 0x53) {
2503 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2505 uint64_t next = avio_tell(s->pb) + klv.length;
2506 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2508 /* only seek forward, else this can loop for a long time */
2509 if (avio_tell(s->pb) > next) {
2510 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2512 return AVERROR_INVALIDDATA;
2515 avio_seek(s->pb, next, SEEK_SET);
2518 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2525 * Seeks to the previous partition and parses it, if possible
2526 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2528 static int mxf_seek_to_previous_partition(MXFContext *mxf)
2530 AVIOContext *pb = mxf->fc->pb;
2532 int64_t current_partition_ofs;
2535 if (!mxf->current_partition ||
2536 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2537 return 0; /* we've parsed all partitions */
2539 /* seek to previous partition */
2540 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2541 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2542 mxf->current_partition = NULL;
2544 av_log(mxf->fc, AV_LOG_TRACE, "seeking to previous partition\n");
2546 /* Make sure this is actually a PartitionPack, and if so parse it.
2549 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2550 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2554 if (!mxf_is_partition_pack_key(klv.key)) {
2555 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2556 return AVERROR_INVALIDDATA;
2559 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2560 * can point to just before the current partition, causing klv_read_packet()
2561 * to sync back up to it. See deadlock3.mxf
2563 if (klv.offset >= current_partition_ofs) {
2564 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2565 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2566 return AVERROR_INVALIDDATA;
2569 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2576 * Called when essence is encountered
2577 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2579 static int mxf_parse_handle_essence(MXFContext *mxf)
2581 AVIOContext *pb = mxf->fc->pb;
2584 if (mxf->parsing_backward) {
2585 return mxf_seek_to_previous_partition(mxf);
2587 if (!mxf->footer_partition) {
2588 av_log(mxf->fc, AV_LOG_TRACE, "no FooterPartition\n");
2592 av_log(mxf->fc, AV_LOG_TRACE, "seeking to FooterPartition\n");
2594 /* remember where we were so we don't end up seeking further back than this */
2595 mxf->last_forward_tell = avio_tell(pb);
2597 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
2598 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2602 /* seek to FooterPartition and parse backward */
2603 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2604 av_log(mxf->fc, AV_LOG_ERROR,
2605 "failed to seek to FooterPartition @ 0x%" PRIx64
2606 " (%"PRId64") - partial file?\n",
2607 mxf->run_in + mxf->footer_partition, ret);
2611 mxf->current_partition = NULL;
2612 mxf->parsing_backward = 1;
2619 * Called when the next partition or EOF is encountered
2620 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2622 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2624 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2628 * Figures out the proper offset and length of the essence container in each partition
2630 static void mxf_compute_essence_containers(MXFContext *mxf)
2634 /* everything is already correct */
2635 if (mxf->op == OPAtom)
2638 for (x = 0; x < mxf->partitions_count; x++) {
2639 MXFPartition *p = &mxf->partitions[x];
2642 continue; /* BodySID == 0 -> no essence */
2644 if (x >= mxf->partitions_count - 1)
2645 break; /* FooterPartition - can't compute length (and we don't need to) */
2647 /* essence container spans to the next partition */
2648 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2650 if (p->essence_length < 0) {
2651 /* next ThisPartition < essence_offset */
2652 p->essence_length = 0;
2653 av_log(mxf->fc, AV_LOG_ERROR,
2654 "partition %i: bad ThisPartition = %"PRIX64"\n",
2655 x+1, mxf->partitions[x+1].this_partition);
2660 static int64_t round_to_kag(int64_t position, int kag_size)
2662 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2663 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2664 int64_t ret = (position / kag_size) * kag_size;
2665 return ret == position ? ret : ret + kag_size;
2668 static int is_pcm(enum AVCodecID codec_id)
2670 /* we only care about "normal" PCM codecs until we get samples */
2671 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2674 static AVStream* mxf_get_opatom_stream(MXFContext *mxf)
2678 if (mxf->op != OPAtom)
2681 for (i = 0; i < mxf->fc->nb_streams; i++) {
2682 if (mxf->fc->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_DATA)
2684 return mxf->fc->streams[i];
2690 * Deal with the case where for some audio atoms EditUnitByteCount is
2691 * very small (2, 4..). In those cases we should read more than one
2692 * sample per call to mxf_read_packet().
2694 static void mxf_handle_small_eubc(AVFormatContext *s)
2696 MXFContext *mxf = s->priv_data;
2698 /* assuming non-OPAtom == frame wrapped
2699 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2700 AVStream *st = mxf_get_opatom_stream(mxf);
2704 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2705 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO ||
2706 !is_pcm(st->codecpar->codec_id) ||
2707 mxf->nb_index_tables != 1 ||
2708 mxf->index_tables[0].nb_segments != 1 ||
2709 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2712 /* arbitrarily default to 48 kHz PAL audio frame size */
2713 /* TODO: We could compute this from the ratio between the audio
2714 * and video edit rates for 48 kHz NTSC we could use the
2715 * 1802-1802-1802-1802-1801 pattern. */
2716 mxf->edit_units_per_packet = 1920;
2720 * Deal with the case where OPAtom files does not have any IndexTableSegments.
2722 static int mxf_handle_missing_index_segment(MXFContext *mxf)
2724 AVFormatContext *s = mxf->fc;
2725 AVStream *st = NULL;
2726 MXFIndexTableSegment *segment = NULL;
2727 MXFPartition *p = NULL;
2728 int essence_partition_count = 0;
2731 st = mxf_get_opatom_stream(mxf);
2735 /* TODO: support raw video without an index if they exist */
2736 if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO || !is_pcm(st->codecpar->codec_id))
2739 /* check if file already has a IndexTableSegment */
2740 for (i = 0; i < mxf->metadata_sets_count; i++) {
2741 if (mxf->metadata_sets[i]->type == IndexTableSegment)
2745 /* find the essence partition */
2746 for (i = 0; i < mxf->partitions_count; i++) {
2747 /* BodySID == 0 -> no essence */
2748 if (!mxf->partitions[i].body_sid)
2751 p = &mxf->partitions[i];
2752 essence_partition_count++;
2755 /* only handle files with a single essence partition */
2756 if (essence_partition_count != 1)
2759 if (!(segment = av_mallocz(sizeof(*segment))))
2760 return AVERROR(ENOMEM);
2762 if ((ret = mxf_add_metadata_set(mxf, segment))) {
2763 mxf_free_metadataset((MXFMetadataSet**)&segment, 1);
2767 segment->type = IndexTableSegment;
2768 /* stream will be treated as small EditUnitByteCount */
2769 segment->edit_unit_byte_count = (av_get_bits_per_sample(st->codecpar->codec_id) * st->codecpar->channels) >> 3;
2770 segment->index_start_position = 0;
2771 segment->index_duration = s->streams[0]->duration;
2772 segment->index_sid = p->index_sid;
2773 segment->body_sid = p->body_sid;
2777 static void mxf_read_random_index_pack(AVFormatContext *s)
2779 MXFContext *mxf = s->priv_data;
2781 int64_t file_size, max_rip_length, min_rip_length;
2784 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
2787 file_size = avio_size(s->pb);
2789 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2790 * The limit below assumes a file with nothing but partition packs and a RIP.
2791 * Before changing this, consider that a muxer may place each sample in its own partition.
2793 * 105 is the size of the smallest possible PartitionPack
2794 * 12 is the size of each RIP entry
2795 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2797 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2798 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2800 /* We're only interested in RIPs with at least two entries.. */
2801 min_rip_length = 16+1+24+4;
2803 /* See S377m section 11 */
2804 avio_seek(s->pb, file_size - 4, SEEK_SET);
2805 length = avio_rb32(s->pb);
2807 if (length < min_rip_length || length > max_rip_length)
2809 avio_seek(s->pb, file_size - length, SEEK_SET);
2810 if (klv_read_packet(&klv, s->pb) < 0 ||
2811 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2812 klv.length != length - 20)
2815 avio_skip(s->pb, klv.length - 12);
2816 mxf->footer_partition = avio_rb64(s->pb);
2819 if (mxf->run_in + mxf->footer_partition >= file_size) {
2820 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2821 mxf->footer_partition = 0;
2825 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2828 static int mxf_read_header(AVFormatContext *s)
2830 MXFContext *mxf = s->priv_data;
2832 int64_t essence_offset = 0;
2835 mxf->last_forward_tell = INT64_MAX;
2836 mxf->edit_units_per_packet = 1;
2838 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2839 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2840 return AVERROR_INVALIDDATA;
2842 avio_seek(s->pb, -14, SEEK_CUR);
2844 mxf->run_in = avio_tell(s->pb);
2846 mxf_read_random_index_pack(s);
2848 while (!avio_feof(s->pb)) {
2849 const MXFMetadataReadTableEntry *metadata;
2851 if (klv_read_packet(&klv, s->pb) < 0) {
2852 /* EOF - seek to previous partition or stop */
2853 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2859 PRINT_KEY(s, "read header", klv.key);
2860 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2861 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2862 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2863 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2864 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2866 if (!mxf->current_partition) {
2867 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2868 return AVERROR_INVALIDDATA;
2871 if (!mxf->current_partition->essence_offset) {
2872 /* for OP1a we compute essence_offset
2873 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2874 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2875 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2877 int64_t op1a_essence_offset =
2878 round_to_kag(mxf->current_partition->this_partition +
2879 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2880 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2881 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2883 if (mxf->op == OPAtom) {
2884 /* point essence_offset to the actual data
2885 * OPAtom has all the essence in one big KLV
2887 mxf->current_partition->essence_offset = avio_tell(s->pb);
2888 mxf->current_partition->essence_length = klv.length;
2890 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2891 mxf->current_partition->essence_offset = op1a_essence_offset;
2895 if (!essence_offset)
2896 essence_offset = klv.offset;
2898 /* seek to footer, previous partition or stop */
2899 if (mxf_parse_handle_essence(mxf) <= 0)
2902 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2903 /* next partition pack - keep going, seek to previous partition or stop */
2904 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2906 else if (mxf->parsing_backward)
2908 /* we're still parsing forward. proceed to parsing this partition pack */
2911 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2912 if (IS_KLV_KEY(klv.key, metadata->key)) {
2913 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2918 if (!metadata->read) {
2919 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2921 avio_skip(s->pb, klv.length);
2924 /* FIXME avoid seek */
2925 if (!essence_offset) {
2926 av_log(s, AV_LOG_ERROR, "no essence\n");
2927 ret = AVERROR_INVALIDDATA;
2930 avio_seek(s->pb, essence_offset, SEEK_SET);
2932 mxf_compute_essence_containers(mxf);
2934 /* we need to do this before computing the index tables
2935 * to be able to fill in zero IndexDurations with st->duration */
2936 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2939 mxf_handle_missing_index_segment(mxf);
2940 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2943 if (mxf->nb_index_tables > 1) {
2944 /* TODO: look up which IndexSID to use via EssenceContainerData */
2945 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2946 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2947 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2948 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2949 ret = AVERROR_INVALIDDATA;
2953 mxf_handle_small_eubc(s);
2963 * Sets mxf->current_edit_unit based on what offset we're currently at.
2964 * @return next_ofs if OK, <0 on error
2966 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2968 int64_t last_ofs = -1, next_ofs = -1;
2969 MXFIndexTable *t = &mxf->index_tables[0];
2971 /* this is called from the OP1a demuxing logic, which means there
2972 * may be no index tables */
2973 if (mxf->nb_index_tables <= 0)
2976 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2977 while (mxf->current_edit_unit >= 0) {
2978 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2981 if (next_ofs <= last_ofs) {
2982 /* large next_ofs didn't change or current_edit_unit wrapped
2983 * around this fixes the infinite loop on zzuf3.mxf */
2984 av_log(mxf->fc, AV_LOG_ERROR,
2985 "next_ofs didn't change. not deriving packet timestamps\n");
2989 if (next_ofs > current_offset)
2992 last_ofs = next_ofs;
2993 mxf->current_edit_unit++;
2996 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2997 if (mxf->current_edit_unit < 0)
3003 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
3004 uint64_t *sample_count)
3006 int i, total = 0, size = 0;
3007 AVStream *st = mxf->fc->streams[stream_index];
3008 MXFTrack *track = st->priv_data;
3009 AVRational time_base = av_inv_q(track->edit_rate);
3010 AVRational sample_rate = av_inv_q(st->time_base);
3011 const MXFSamplesPerFrame *spf = NULL;
3013 if ((sample_rate.num / sample_rate.den) == 48000)
3014 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
3016 int remainder = (sample_rate.num * time_base.num) %
3017 (time_base.den * sample_rate.den);
3018 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
3019 av_mul_q(sample_rate, time_base)));
3021 av_log(mxf->fc, AV_LOG_WARNING,
3022 "seeking detected on stream #%d with time base (%d/%d) and "
3023 "sample rate (%d/%d), audio pts won't be accurate.\n",
3024 stream_index, time_base.num, time_base.den,
3025 sample_rate.num, sample_rate.den);
3029 while (spf->samples_per_frame[size]) {
3030 total += spf->samples_per_frame[size];
3036 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
3037 for (i = 0; i < mxf->current_edit_unit % size; i++) {
3038 *sample_count += spf->samples_per_frame[i];
3044 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecParameters *par,
3047 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
3048 int64_t bits_per_sample = par->bits_per_coded_sample;
3050 if (!bits_per_sample)
3051 bits_per_sample = av_get_bits_per_sample(par->codec_id);
3053 pkt->pts = track->sample_count;
3055 if ( par->channels <= 0
3056 || bits_per_sample <= 0
3057 || par->channels * (int64_t)bits_per_sample < 8)
3058 return AVERROR(EINVAL);
3059 track->sample_count += pkt->size / (par->channels * (int64_t)bits_per_sample / 8);
3063 static int mxf_set_pts(MXFContext *mxf, AVStream *st, AVPacket *pkt, int64_t next_ofs)
3065 AVCodecParameters *par = st->codecpar;
3066 MXFTrack *track = st->priv_data;
3068 if (par->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
3069 /* mxf->current_edit_unit good - see if we have an
3070 * index table to derive timestamps from */
3071 MXFIndexTable *t = &mxf->index_tables[0];
3073 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
3074 pkt->dts = mxf->current_edit_unit + t->first_dts;
3075 pkt->pts = t->ptses[mxf->current_edit_unit];
3076 } else if (track && track->intra_only) {
3077 /* intra-only -> PTS = EditUnit.
3078 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
3079 pkt->pts = mxf->current_edit_unit;
3081 } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
3082 int ret = mxf_set_audio_pts(mxf, par, pkt);
3089 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
3092 MXFContext *mxf = s->priv_data;
3095 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
3096 PRINT_KEY(s, "read packet", klv.key);
3097 av_log(s, AV_LOG_TRACE, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
3098 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
3099 ret = mxf_decrypt_triplet(s, pkt, &klv);
3101 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
3106 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
3107 IS_KLV_KEY(klv.key, mxf_canopus_essence_element_key) ||
3108 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
3109 int index = mxf_get_stream_index(s, &klv);
3110 int64_t next_ofs, next_klv;
3114 av_log(s, AV_LOG_ERROR,
3115 "error getting stream index %"PRIu32"\n",
3116 AV_RB32(klv.key + 12));
3120 st = s->streams[index];
3122 if (s->streams[index]->discard == AVDISCARD_ALL)
3125 next_klv = avio_tell(s->pb) + klv.length;
3126 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
3128 if (next_ofs >= 0 && next_klv > next_ofs) {
3129 /* if this check is hit then it's possible OPAtom was treated as OP1a
3130 * truncate the packet since it's probably very large (>2 GiB is common) */
3131 avpriv_request_sample(s,
3132 "OPAtom misinterpreted as OP1a? "
3133 "KLV for edit unit %i extending into "
3135 mxf->current_edit_unit);
3136 klv.length = next_ofs - avio_tell(s->pb);
3139 /* check for 8 channels AES3 element */
3140 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
3141 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
3144 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
3148 ret = av_get_packet(s->pb, pkt, klv.length);
3152 pkt->stream_index = index;
3153 pkt->pos = klv.offset;
3155 ret = mxf_set_pts(mxf, st, pkt, next_ofs);
3159 /* seek for truncated packets */
3160 avio_seek(s->pb, next_klv, SEEK_SET);
3165 avio_skip(s->pb, klv.length);
3167 return avio_feof(s->pb) ? AVERROR_EOF : ret;
3170 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
3172 MXFContext *mxf = s->priv_data;
3174 int64_t ret64, pos, next_pos;
3179 if (mxf->op != OPAtom)
3180 return mxf_read_packet_old(s, pkt);
3182 // If we have no streams then we basically are at EOF
3183 st = mxf_get_opatom_stream(mxf);
3187 /* OPAtom - clip wrapped demuxing */
3188 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
3189 t = &mxf->index_tables[0];
3191 if (mxf->current_edit_unit >= st->duration)
3194 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
3196 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
3199 /* compute size by finding the next edit unit or the end of the essence container
3200 * not pretty, but it works */
3201 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
3202 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
3203 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
3204 return AVERROR_INVALIDDATA;
3207 if ((size = next_pos - pos) <= 0) {
3208 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
3209 return AVERROR_INVALIDDATA;
3212 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
3215 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
3218 pkt->stream_index = st->index;
3220 ret = mxf_set_pts(mxf, st, pkt, next_pos);
3224 mxf->current_edit_unit += edit_units;
3229 static int mxf_read_close(AVFormatContext *s)
3231 MXFContext *mxf = s->priv_data;
3234 av_freep(&mxf->packages_refs);
3236 for (i = 0; i < s->nb_streams; i++)
3237 s->streams[i]->priv_data = NULL;
3239 for (i = 0; i < mxf->metadata_sets_count; i++) {
3240 mxf_free_metadataset(mxf->metadata_sets + i, 1);
3242 av_freep(&mxf->partitions);
3243 av_freep(&mxf->metadata_sets);
3244 av_freep(&mxf->aesc);
3245 av_freep(&mxf->local_tags);
3247 if (mxf->index_tables) {
3248 for (i = 0; i < mxf->nb_index_tables; i++) {
3249 av_freep(&mxf->index_tables[i].segments);
3250 av_freep(&mxf->index_tables[i].ptses);
3251 av_freep(&mxf->index_tables[i].fake_index);
3252 av_freep(&mxf->index_tables[i].offsets);
3255 av_freep(&mxf->index_tables);
3260 static int mxf_probe(AVProbeData *p) {
3261 const uint8_t *bufp = p->buf;
3262 const uint8_t *end = p->buf + p->buf_size;
3264 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
3267 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
3268 end -= sizeof(mxf_header_partition_pack_key);
3270 for (; bufp < end;) {
3271 if (!((bufp[13] - 1) & 0xF2)){
3272 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
3273 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
3274 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
3275 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
3276 return AVPROBE_SCORE_MAX;
3285 /* rudimentary byte seek */
3286 /* XXX: use MXF Index */
3287 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
3289 AVStream *st = s->streams[stream_index];
3291 MXFContext* mxf = s->priv_data;
3295 MXFTrack *source_track = st->priv_data;
3297 if(st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
3300 /* if audio then truncate sample_time to EditRate */
3301 if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
3302 sample_time = av_rescale_q(sample_time, st->time_base,
3303 av_inv_q(source_track->edit_rate));
3305 if (mxf->nb_index_tables <= 0) {
3307 return AVERROR_INVALIDDATA;
3308 if (sample_time < 0)
3310 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
3312 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
3316 ff_update_cur_dts(s, st, sample_time);
3317 mxf->current_edit_unit = sample_time;
3319 t = &mxf->index_tables[0];
3321 /* clamp above zero, else ff_index_search_timestamp() returns negative
3322 * this also means we allow seeking before the start */
3323 sample_time = FFMAX(sample_time, 0);
3325 if (t->fake_index) {
3326 /* The first frames may not be keyframes in presentation order, so
3327 * we have to advance the target to be able to find the first
3328 * keyframe backwards... */
3329 if (!(flags & AVSEEK_FLAG_ANY) &&
3330 (flags & AVSEEK_FLAG_BACKWARD) &&
3331 t->ptses[0] != AV_NOPTS_VALUE &&
3332 sample_time < t->ptses[0] &&
3333 (t->fake_index[t->ptses[0]].flags & AVINDEX_KEYFRAME))
3334 sample_time = t->ptses[0];
3336 /* behave as if we have a proper index */
3337 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
3339 /* get the stored order index from the display order index */
3340 sample_time += t->offsets[sample_time];
3342 /* no IndexEntryArray (one or more CBR segments)
3343 * make sure we don't seek past the end */
3344 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
3347 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
3350 ff_update_cur_dts(s, st, sample_time);
3351 mxf->current_edit_unit = sample_time;
3352 avio_seek(s->pb, seekpos, SEEK_SET);
3355 // Update all tracks sample count
3356 for (i = 0; i < s->nb_streams; i++) {
3357 AVStream *cur_st = s->streams[i];
3358 MXFTrack *cur_track = cur_st->priv_data;
3359 uint64_t current_sample_count = 0;
3360 if (cur_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
3361 ret = mxf_compute_sample_count(mxf, i, ¤t_sample_count);
3365 cur_track->sample_count = current_sample_count;
3371 AVInputFormat ff_mxf_demuxer = {
3373 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
3374 .flags = AVFMT_SEEK_TO_PTS,
3375 .priv_data_size = sizeof(MXFContext),
3376 .read_probe = mxf_probe,
3377 .read_header = mxf_read_header,
3378 .read_packet = mxf_read_packet,
3379 .read_close = mxf_read_close,
3380 .read_seek = mxf_read_seek,