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 "libavcodec/bytestream.h"
55
enum MXFMetadataSetType type;
56
UID source_container_ul;
61
enum MXFMetadataSetType type;
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UID source_package_uid;
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UID data_definition_ul;
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int64_t start_position;
67
} MXFStructuralComponent;
71
enum MXFMetadataSetType type;
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UID data_definition_ul;
73
UID *structural_components_refs;
74
int structural_components_count;
80
enum MXFMetadataSetType type;
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MXFSequence *sequence; /* mandatory, and only one */
84
uint8_t track_number[4];
90
enum MXFMetadataSetType type;
91
UID essence_container_ul;
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AVRational sample_rate;
94
AVRational aspect_ratio;
99
UID *sub_descriptors_refs;
100
int sub_descriptors_count;
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enum MXFMetadataSetType type;
109
} MXFIndexTableSegment;
113
enum MXFMetadataSetType type;
117
MXFDescriptor *descriptor; /* only one */
123
enum MXFMetadataSetType type;
129
MXFMetadataSet **metadata_sets;
130
int metadata_sets_count;
134
int local_tags_count;
137
enum MXFWrappingScheme {
146
enum MXFMetadataSetType type;
147
} MXFMetadataReadTableEntry;
149
/* partial keys to match */
150
static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
151
static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
152
static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
153
/* complete keys to match */
154
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 };
155
static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
156
static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
157
static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
159
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
161
static int64_t klv_decode_ber_length(ByteIOContext *pb)
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uint64_t size = get_byte(pb);
164
if (size & 0x80) { /* long form */
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int bytes_num = size & 0x7f;
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/* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
171
size = size << 8 | get_byte(pb);
176
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
179
for (i = 0; i < size && !url_feof(pb); i++) {
183
else if (b != key[i])
189
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
191
if (!mxf_read_sync(pb, mxf_klv_key, 4))
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klv->offset = url_ftell(pb) - 4;
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memcpy(klv->key, mxf_klv_key, 4);
195
get_buffer(pb, klv->key + 4, 12);
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klv->length = klv_decode_ber_length(pb);
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return klv->length == -1 ? -1 : 0;
200
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
204
for (i = 0; i < s->nb_streams; i++) {
205
MXFTrack *track = s->streams[i]->priv_data;
207
if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
210
/* return 0 if only one stream, for OP Atom files with 0 as track number */
211
return s->nb_streams == 1 ? 0 : -1;
214
/* XXX: use AVBitStreamFilter */
215
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
217
const uint8_t *buf_ptr, *end_ptr;
221
if (length > 61444) /* worst case PAL 1920 samples 8 channels */
223
av_new_packet(pkt, length);
224
get_buffer(pb, pkt->data, length);
225
data_ptr = pkt->data;
226
end_ptr = pkt->data + length;
227
buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
228
for (; buf_ptr < end_ptr; ) {
229
for (i = 0; i < st->codec->channels; i++) {
230
uint32_t sample = bytestream_get_le32(&buf_ptr);
231
if (st->codec->bits_per_coded_sample == 24)
232
bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
234
bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
236
buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
238
pkt->size = data_ptr - pkt->data;
242
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
244
static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
245
MXFContext *mxf = s->priv_data;
246
ByteIOContext *pb = s->pb;
247
int64_t end = url_ftell(pb) + klv->length;
250
uint64_t plaintext_size;
255
if (!mxf->aesc && s->key && s->keylen == 16) {
256
mxf->aesc = av_malloc(av_aes_size);
259
av_aes_init(mxf->aesc, s->key, 128, 1);
262
url_fskip(pb, klv_decode_ber_length(pb));
264
klv_decode_ber_length(pb);
265
plaintext_size = get_be64(pb);
267
klv_decode_ber_length(pb);
268
get_buffer(pb, klv->key, 16);
269
if (!IS_KLV_KEY(klv, mxf_essence_element_key))
271
index = mxf_get_stream_index(s, klv);
275
klv_decode_ber_length(pb);
276
orig_size = get_be64(pb);
277
if (orig_size < plaintext_size)
280
size = klv_decode_ber_length(pb);
281
if (size < 32 || size - 32 < orig_size)
283
get_buffer(pb, ivec, 16);
284
get_buffer(pb, tmpbuf, 16);
286
av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
287
if (memcmp(tmpbuf, checkv, 16))
288
av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
290
av_get_packet(pb, pkt, size);
291
size -= plaintext_size;
293
av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
294
&pkt->data[plaintext_size], size >> 4, ivec, 1);
295
pkt->size = orig_size;
296
pkt->stream_index = index;
297
url_fskip(pb, end - url_ftell(pb));
301
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
305
while (!url_feof(s->pb)) {
306
if (klv_read_packet(&klv, s->pb) < 0)
308
PRINT_KEY(s, "read packet", klv.key);
309
dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
310
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
311
int res = mxf_decrypt_triplet(s, pkt, &klv);
313
av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
318
if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
319
int index = mxf_get_stream_index(s, &klv);
321
av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
324
if (s->streams[index]->discard == AVDISCARD_ALL)
326
/* check for 8 channels AES3 element */
327
if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
328
if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
329
av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
333
av_get_packet(s->pb, pkt, klv.length);
334
pkt->stream_index = index;
335
pkt->pos = klv.offset;
339
url_fskip(s->pb, klv.length);
344
static int mxf_read_primer_pack(MXFContext *mxf)
346
ByteIOContext *pb = mxf->fc->pb;
347
int item_num = get_be32(pb);
348
int item_len = get_be32(pb);
350
if (item_len != 18) {
351
av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
354
if (item_num > UINT_MAX / item_len)
356
mxf->local_tags_count = item_num;
357
mxf->local_tags = av_malloc(item_num*item_len);
358
if (!mxf->local_tags)
360
get_buffer(pb, mxf->local_tags, item_num*item_len);
364
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
366
if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
367
return AVERROR(ENOMEM);
368
mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
369
if (!mxf->metadata_sets)
371
mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
372
mxf->metadata_sets_count++;
376
static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
380
if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
381
get_buffer(pb, cryptocontext->source_container_ul, 16);
385
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
389
mxf->packages_count = get_be32(pb);
390
if (mxf->packages_count >= UINT_MAX / sizeof(UID))
392
mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
393
if (!mxf->packages_refs)
395
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
396
get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
402
static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
406
source_clip->duration = get_be64(pb);
409
source_clip->start_position = get_be64(pb);
412
/* UMID, only get last 16 bytes */
414
get_buffer(pb, source_clip->source_package_uid, 16);
417
source_clip->source_track_id = get_be32(pb);
423
static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
427
package->tracks_count = get_be32(pb);
428
if (package->tracks_count >= UINT_MAX / sizeof(UID))
430
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
431
if (!package->tracks_refs)
433
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
434
get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
440
static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
444
track->track_id = get_be32(pb);
447
get_buffer(pb, track->track_number, 4);
450
track->edit_rate.den = get_be32(pb);
451
track->edit_rate.num = get_be32(pb);
454
get_buffer(pb, track->sequence_ref, 16);
460
static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
464
sequence->duration = get_be64(pb);
467
get_buffer(pb, sequence->data_definition_ul, 16);
470
sequence->structural_components_count = get_be32(pb);
471
if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
473
sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
474
if (!sequence->structural_components_refs)
476
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
477
get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
483
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
487
package->tracks_count = get_be32(pb);
488
if (package->tracks_count >= UINT_MAX / sizeof(UID))
490
package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
491
if (!package->tracks_refs)
493
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
494
get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
497
/* UMID, only get last 16 bytes */
499
get_buffer(pb, package->package_uid, 16);
502
get_buffer(pb, package->descriptor_ref, 16);
508
static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag)
511
case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
512
case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
513
case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
514
case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
515
case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
516
case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
521
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
527
dprintf(NULL, "pixel layout: code %#x\n", code);
530
descriptor->bits_per_sample += get_byte(pb);
533
descriptor->bits_per_sample += get_byte(pb);
536
descriptor->bits_per_sample += get_byte(pb);
541
} while (code != 0); /* SMPTE 377M E.2.46 */
544
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
548
descriptor->sub_descriptors_count = get_be32(pb);
549
if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
551
descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
552
if (!descriptor->sub_descriptors_refs)
554
url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
555
get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
558
get_buffer(pb, descriptor->essence_container_ul, 16);
561
descriptor->linked_track_id = get_be32(pb);
563
case 0x3201: /* PictureEssenceCoding */
564
get_buffer(pb, descriptor->essence_codec_ul, 16);
567
descriptor->width = get_be32(pb);
570
descriptor->height = get_be32(pb);
573
descriptor->aspect_ratio.num = get_be32(pb);
574
descriptor->aspect_ratio.den = get_be32(pb);
577
descriptor->sample_rate.num = get_be32(pb);
578
descriptor->sample_rate.den = get_be32(pb);
580
case 0x3D06: /* SoundEssenceCompression */
581
get_buffer(pb, descriptor->essence_codec_ul, 16);
584
descriptor->channels = get_be32(pb);
587
descriptor->bits_per_sample = get_be32(pb);
590
mxf_read_pixel_layout(pb, descriptor);
593
/* Private uid used by SONY C0023S01.mxf */
594
if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
595
descriptor->extradata = av_malloc(size);
596
if (!descriptor->extradata)
598
descriptor->extradata_size = size;
599
get_buffer(pb, descriptor->extradata, size);
607
* Match an uid independently of the version byte and up to len common bytes
610
static int mxf_match_uid(const UID key, const UID uid, int len)
613
for (i = 0; i < len; i++) {
614
if (i != 7 && key[i] != uid[i])
620
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
622
while (uls->uid[0]) {
623
if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
630
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
636
for (i = 0; i < mxf->metadata_sets_count; i++) {
637
if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
638
(type == AnyType || mxf->metadata_sets[i]->type == type)) {
639
return mxf->metadata_sets[i];
645
static const MXFCodecUL mxf_essence_container_uls[] = {
646
// video essence container uls
647
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
648
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
649
// sound essence container uls
650
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
651
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
652
{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
653
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
656
static int mxf_parse_structural_metadata(MXFContext *mxf)
658
MXFPackage *material_package = NULL;
659
MXFPackage *temp_package = NULL;
662
dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
663
/* TODO: handle multiple material packages (OP3x) */
664
for (i = 0; i < mxf->packages_count; i++) {
665
material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
666
if (material_package) break;
668
if (!material_package) {
669
av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
673
for (i = 0; i < material_package->tracks_count; i++) {
674
MXFPackage *source_package = NULL;
675
MXFTrack *material_track = NULL;
676
MXFTrack *source_track = NULL;
677
MXFTrack *temp_track = NULL;
678
MXFDescriptor *descriptor = NULL;
679
MXFStructuralComponent *component = NULL;
680
UID *essence_container_ul = NULL;
681
const MXFCodecUL *codec_ul = NULL;
682
const MXFCodecUL *container_ul = NULL;
685
if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
686
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
690
if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
691
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
695
/* TODO: handle multiple source clips */
696
for (j = 0; j < material_track->sequence->structural_components_count; j++) {
697
/* TODO: handle timecode component */
698
component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
702
for (k = 0; k < mxf->packages_count; k++) {
703
temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
706
if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
707
source_package = temp_package;
711
if (!source_package) {
712
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
715
for (k = 0; k < source_package->tracks_count; k++) {
716
if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
717
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
720
if (temp_track->track_id == component->source_track_id) {
721
source_track = temp_track;
726
av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
733
st = av_new_stream(mxf->fc, source_track->track_id);
735
av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
738
st->priv_data = source_track;
739
st->duration = component->duration;
740
if (st->duration == -1)
741
st->duration = AV_NOPTS_VALUE;
742
st->start_time = component->start_position;
743
av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
745
if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
746
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
750
PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
751
codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
752
st->codec->codec_type = codec_ul->id;
754
source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
755
if (source_package->descriptor) {
756
if (source_package->descriptor->type == MultipleDescriptor) {
757
for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
758
MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
760
if (!sub_descriptor) {
761
av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
764
if (sub_descriptor->linked_track_id == source_track->track_id) {
765
descriptor = sub_descriptor;
769
} else if (source_package->descriptor->type == Descriptor)
770
descriptor = source_package->descriptor;
773
av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
776
PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
777
PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
778
essence_container_ul = &descriptor->essence_container_ul;
779
/* HACK: replacing the original key with mxf_encrypted_essence_container
780
* is not allowed according to s429-6, try to find correct information anyway */
781
if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
782
av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
783
for (k = 0; k < mxf->metadata_sets_count; k++) {
784
MXFMetadataSet *metadata = mxf->metadata_sets[k];
785
if (metadata->type == CryptoContext) {
786
essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
791
/* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
792
codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
793
st->codec->codec_id = codec_ul->id;
794
if (descriptor->extradata) {
795
st->codec->extradata = descriptor->extradata;
796
st->codec->extradata_size = descriptor->extradata_size;
798
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
799
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
800
if (st->codec->codec_id == CODEC_ID_NONE)
801
st->codec->codec_id = container_ul->id;
802
st->codec->width = descriptor->width;
803
st->codec->height = descriptor->height;
804
st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
805
st->need_parsing = AVSTREAM_PARSE_HEADERS;
806
} else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
807
container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
808
if (st->codec->codec_id == CODEC_ID_NONE)
809
st->codec->codec_id = container_ul->id;
810
st->codec->channels = descriptor->channels;
811
st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
812
st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
813
/* TODO: implement CODEC_ID_RAWAUDIO */
814
if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
815
if (descriptor->bits_per_sample == 24)
816
st->codec->codec_id = CODEC_ID_PCM_S24LE;
817
else if (descriptor->bits_per_sample == 32)
818
st->codec->codec_id = CODEC_ID_PCM_S32LE;
819
} else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
820
if (descriptor->bits_per_sample == 24)
821
st->codec->codec_id = CODEC_ID_PCM_S24BE;
822
else if (descriptor->bits_per_sample == 32)
823
st->codec->codec_id = CODEC_ID_PCM_S32BE;
824
} else if (st->codec->codec_id == CODEC_ID_MP2) {
825
st->need_parsing = AVSTREAM_PARSE_FULL;
828
if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
829
av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
830
st->need_parsing = AVSTREAM_PARSE_FULL;
836
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
837
{ { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
838
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
839
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
840
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
841
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
842
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
843
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
844
{ { 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 */
845
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
846
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
847
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
848
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
849
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
850
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
851
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
852
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
853
{ { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
854
{ { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
857
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
859
ByteIOContext *pb = mxf->fc->pb;
860
MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
861
uint64_t klv_end = url_ftell(pb) + klv->length;
865
while (url_ftell(pb) + 4 < klv_end) {
866
int tag = get_be16(pb);
867
int size = get_be16(pb); /* KLV specified by 0x53 */
868
uint64_t next = url_ftell(pb) + size;
871
dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
872
if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
873
av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
876
if (tag > 0x7FFF) { /* dynamic tag */
878
for (i = 0; i < mxf->local_tags_count; i++) {
879
int local_tag = AV_RB16(mxf->local_tags+i*18);
880
if (local_tag == tag) {
881
memcpy(uid, mxf->local_tags+i*18+2, 16);
882
dprintf(mxf->fc, "local tag %#04x\n", local_tag);
883
PRINT_KEY(mxf->fc, "uid", uid);
887
if (ctx_size && tag == 0x3C0A)
888
get_buffer(pb, ctx->uid, 16);
889
else if (read_child(ctx, pb, tag, size, uid) < 0)
892
url_fseek(pb, next, SEEK_SET);
894
if (ctx_size) ctx->type = type;
895
return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
898
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
900
MXFContext *mxf = s->priv_data;
903
if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
904
av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
907
url_fseek(s->pb, -14, SEEK_CUR);
909
while (!url_feof(s->pb)) {
910
const MXFMetadataReadTableEntry *metadata;
912
if (klv_read_packet(&klv, s->pb) < 0)
914
PRINT_KEY(s, "read header", klv.key);
915
dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
916
if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
917
IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
918
/* FIXME avoid seek */
919
url_fseek(s->pb, klv.offset, SEEK_SET);
923
for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
924
if (IS_KLV_KEY(klv.key, metadata->key)) {
925
int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
926
if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
927
av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
934
url_fskip(s->pb, klv.length);
936
return mxf_parse_structural_metadata(mxf);
939
static int mxf_read_close(AVFormatContext *s)
941
MXFContext *mxf = s->priv_data;
944
av_freep(&mxf->packages_refs);
946
for (i = 0; i < s->nb_streams; i++)
947
s->streams[i]->priv_data = NULL;
949
for (i = 0; i < mxf->metadata_sets_count; i++) {
950
switch (mxf->metadata_sets[i]->type) {
951
case MultipleDescriptor:
952
av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
955
av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
958
case MaterialPackage:
959
av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
964
av_freep(&mxf->metadata_sets[i]);
966
av_freep(&mxf->metadata_sets);
967
av_freep(&mxf->aesc);
968
av_freep(&mxf->local_tags);
972
static int mxf_probe(AVProbeData *p) {
973
uint8_t *bufp = p->buf;
974
uint8_t *end = p->buf + p->buf_size;
976
if (p->buf_size < sizeof(mxf_header_partition_pack_key))
979
/* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
980
end -= sizeof(mxf_header_partition_pack_key);
981
for (; bufp < end; bufp++) {
982
if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
983
return AVPROBE_SCORE_MAX;
988
/* rudimentary byte seek */
989
/* XXX: use MXF Index */
990
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
992
AVStream *st = s->streams[stream_index];
999
seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1000
url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1001
av_update_cur_dts(s, st, sample_time);
1005
AVInputFormat mxf_demuxer = {
1007
NULL_IF_CONFIG_SMALL("Material eXchange Format"),