Statistics
| Branch: | Revision:

ffmpeg / libavformat / mxf.c @ 4647c0ec

History | View | Annotate | Download (42 KB)

1
/*
2
 * MXF demuxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
4
 *
5
 * This file is part of FFmpeg.
6
 *
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.
11
 *
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.
16
 *
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
20
 */
21

    
22
/*
23
 * References
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
31
 *
32
 * Principle
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.
38
 *
39
 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40
 * Metadata parsing resolves Strong References to objects.
41
 *
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
44
 */
45

    
46
//#define DEBUG
47

    
48
#include "avformat.h"
49

    
50
typedef uint8_t UID[16];
51

    
52
enum MXFMetadataSetType {
53
    MaterialPackage,
54
    SourcePackage,
55
    SourceClip,
56
    TimecodeComponent,
57
    Sequence,
58
    MultipleDescriptor,
59
    Descriptor,
60
    Track,
61
    EssenceContainerData,
62
};
63

    
64
typedef struct MXFStructuralComponent {
65
    UID uid;
66
    enum MXFMetadataSetType type;
67
    UID source_package_uid;
68
    UID data_definition_ul;
69
    int64_t duration;
70
    int64_t start_position;
71
    int source_track_id;
72
} MXFStructuralComponent;
73

    
74
typedef struct MXFSequence {
75
    UID uid;
76
    enum MXFMetadataSetType type;
77
    UID data_definition_ul;
78
    UID *structural_components_refs;
79
    int structural_components_count;
80
    int64_t duration;
81
} MXFSequence;
82

    
83
typedef struct MXFTrack {
84
    UID uid;
85
    enum MXFMetadataSetType type;
86
    MXFSequence *sequence; /* mandatory, and only one */
87
    UID sequence_ref;
88
    int track_id;
89
    uint8_t track_number[4];
90
    AVRational edit_rate;
91
} MXFTrack;
92

    
93
typedef struct MXFDescriptor {
94
    UID uid;
95
    enum MXFMetadataSetType type;
96
    UID essence_container_ul;
97
    UID essence_codec_ul;
98
    AVRational sample_rate;
99
    AVRational aspect_ratio;
100
    int width;
101
    int height;
102
    int channels;
103
    int bits_per_sample;
104
    UID *sub_descriptors_refs;
105
    int sub_descriptors_count;
106
    int linked_track_id;
107
    uint8_t *extradata;
108
    int extradata_size;
109
} MXFDescriptor;
110

    
111
typedef struct MXFPackage {
112
    UID uid;
113
    enum MXFMetadataSetType type;
114
    UID package_uid;
115
    UID *tracks_refs;
116
    int tracks_count;
117
    MXFDescriptor *descriptor; /* only one */
118
    UID descriptor_ref;
119
} MXFPackage;
120

    
121
typedef struct MXFEssenceContainerData {
122
    UID uid;
123
    enum MXFMetadataSetType type;
124
    UID linked_package_uid;
125
} MXFEssenceContainerData;
126

    
127
typedef struct {
128
    UID uid;
129
    enum MXFMetadataSetType type;
130
} MXFMetadataSet;
131

    
132
typedef struct MXFContext {
133
    UID *packages_refs;
134
    int packages_count;
135
    UID *essence_container_data_sets_refs;
136
    int essence_container_data_sets_count;
137
    UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
138
    int essence_containers_uls_count;
139
    UID operational_pattern_ul;
140
    UID content_storage_uid;
141
    MXFMetadataSet **metadata_sets;
142
    int metadata_sets_count;
143
    AVFormatContext *fc;
144
} MXFContext;
145

    
146
typedef struct KLVPacket {
147
    UID key;
148
    offset_t offset;
149
    uint64_t length;
150
} KLVPacket;
151

    
152
enum MXFWrappingScheme {
153
    Frame,
154
    Clip,
155
};
156

    
157
typedef struct MXFCodecUL {
158
    UID uid;
159
    enum CodecID id;
160
    enum MXFWrappingScheme wrapping;
161
} MXFCodecUL;
162

    
163
typedef struct MXFDataDefinitionUL {
164
    UID uid;
165
    enum CodecType type;
166
} MXFDataDefinitionUL;
167

    
168
typedef struct MXFMetadataReadTableEntry {
169
    const UID key;
170
    int (*read)(MXFContext *mxf, KLVPacket *klv);
171
} MXFMetadataReadTableEntry;
172

    
173
/* partial keys to match */
174
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
175
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
176

    
177
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
178

    
179
#define PRINT_KEY(s, x) dprintf("%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
180
                             (x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])
181

    
182
static int64_t klv_decode_ber_length(ByteIOContext *pb)
183
{
184
    int64_t size = 0;
185
    uint8_t length = get_byte(pb);
186
    int type = length >> 7;
187

    
188
    if (type) { /* long form */
189
        int bytes_num = length & 0x7f;
190
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
191
        if (bytes_num > 8)
192
            return -1;
193
        while (bytes_num--)
194
            size = size << 8 | get_byte(pb);
195
    } else {
196
        size = length & 0x7f;
197
    }
198
    return size;
199
}
200

    
201
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
202
{
203
    klv->offset = url_ftell(pb);
204
    get_buffer(pb, klv->key, 16);
205
    klv->length = klv_decode_ber_length(pb);
206
    return klv->length == -1 ? -1 : 0;
207
}
208

    
209
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
210
{
211
    int i;
212

    
213
    for (i = 0; i < s->nb_streams; i++) {
214
        MXFTrack *track = s->streams[i]->priv_data;
215
         /* SMPTE 379M 7.3 */
216
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
217
            return i;
218
    }
219
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
220
    return s->nb_streams == 1 ? 0 : -1;
221
}
222

    
223
/* XXX: use AVBitStreamFilter */
224
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
225
{
226
    uint8_t buffer[61444];
227
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
228

    
229
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
230
        return -1;
231
    get_buffer(pb, buffer, length);
232
    av_new_packet(pkt, length);
233
    data_ptr = pkt->data;
234
    end_ptr = buffer + length;
235
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
236
    for (; buf_ptr < end_ptr; buf_ptr += 4) {
237
        if (st->codec->bits_per_sample == 24) {
238
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
239
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
240
            data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
241
            data_ptr += 3;
242
        } else {
243
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
244
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
245
            data_ptr += 2;
246
        }
247
    }
248
    pkt->size = data_ptr - pkt->data;
249
    return 0;
250
}
251

    
252
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
253
{
254
    KLVPacket klv;
255

    
256
    while (!url_feof(&s->pb)) {
257
        if (klv_read_packet(&klv, &s->pb) < 0) {
258
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
259
            return -1;
260
        }
261
#ifdef DEBUG
262
        PRINT_KEY("read packet", klv.key);
263
#endif
264
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
265
            int index = mxf_get_stream_index(s, &klv);
266
            if (index < 0) {
267
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
268
                url_fskip(&s->pb, klv.length);
269
                return -1;
270
            }
271
            /* check for 8 channels AES3 element */
272
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
273
                if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
274
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
275
                    return -1;
276
                }
277
            } else
278
                av_get_packet(&s->pb, pkt, klv.length);
279
            pkt->stream_index = index;
280
            return 0;
281
        } else
282
            url_fskip(&s->pb, klv.length);
283
    }
284
    return AVERROR_IO;
285
}
286

    
287
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
288
{
289
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
290
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
291
    mxf->metadata_sets_count++;
292
    return 0;
293
}
294

    
295
static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
296
{
297
    ByteIOContext *pb = &mxf->fc->pb;
298
    int bytes_read = 0;
299

    
300
    while (bytes_read < klv->length) {
301
        int tag = get_be16(pb);
302
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
303

    
304
        switch (tag) {
305
        case 0x3B03:
306
            get_buffer(pb, mxf->content_storage_uid, 16);
307
            break;
308
        case 0x3B09:
309
            get_buffer(pb, mxf->operational_pattern_ul, 16);
310
            break;
311
        case 0x3B0A:
312
            mxf->essence_containers_uls_count = get_be32(pb);
313
            if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
314
                return -1;
315
            mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
316
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
317
            get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
318
            break;
319
        default:
320
            url_fskip(pb, size);
321
        }
322
        bytes_read += size + 4;
323
    }
324
    return 0;
325
}
326

    
327
static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
328
{
329
    ByteIOContext *pb = &mxf->fc->pb;
330
    int bytes_read = 0;
331

    
332
    while (bytes_read < klv->length) {
333
        int tag = get_be16(pb);
334
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
335

    
336
        dprintf("tag 0x%04X, size %d\n", tag, size);
337
        switch (tag) {
338
        case 0x1901:
339
            mxf->packages_count = get_be32(pb);
340
            if (mxf->packages_count >= UINT_MAX / sizeof(UID))
341
                return -1;
342
            mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
343
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
344
            get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
345
            break;
346
        case 0x1902:
347
            mxf->essence_container_data_sets_count = get_be32(pb);
348
            if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
349
                return -1;
350
            mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
351
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
352
            get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
353
            break;
354
        default:
355
            url_fskip(pb, size);
356
        }
357
        bytes_read += size + 4;
358
    }
359
    return 0;
360
}
361

    
362
static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
363
{
364
    ByteIOContext *pb = &mxf->fc->pb;
365
    MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
366
    int bytes_read = 0;
367

    
368
    while (bytes_read < klv->length) {
369
        int tag = get_be16(pb);
370
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
371

    
372
        bytes_read += size + 4;
373
        dprintf("tag 0x%04X, size %d\n", tag, size);
374
        if (!size) /* ignore empty tag, needed for some files with empty UMID tag */
375
            continue;
376
        switch (tag) {
377
        case 0x3C0A:
378
            get_buffer(pb, source_clip->uid, 16);
379
            break;
380
        case 0x0202:
381
            source_clip->duration = get_be64(pb);
382
            break;
383
        case 0x1201:
384
            source_clip->start_position = get_be64(pb);
385
            break;
386
        case 0x1101:
387
            /* UMID, only get last 16 bytes */
388
            url_fskip(pb, 16);
389
            get_buffer(pb, source_clip->source_package_uid, 16);
390
            break;
391
        case 0x1102:
392
            source_clip->source_track_id = get_be32(pb);
393
            break;
394
        default:
395
            url_fskip(pb, size);
396
        }
397
    }
398
    source_clip->type = SourceClip;
399
    return mxf_add_metadata_set(mxf, source_clip);
400
}
401

    
402
static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
403
{
404
    ByteIOContext *pb = &mxf->fc->pb;
405
    MXFPackage *package = av_mallocz(sizeof(*package));
406
    int bytes_read = 0;
407

    
408
    while (bytes_read < klv->length) {
409
        int tag = get_be16(pb);
410
        int size = get_be16(pb); /* KLV specified by 0x53 */
411

    
412
        switch (tag) {
413
        case 0x3C0A:
414
            get_buffer(pb, package->uid, 16);
415
            break;
416
        case 0x4403:
417
            package->tracks_count = get_be32(pb);
418
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
419
                return -1;
420
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
421
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
422
            get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
423
            break;
424
        default:
425
            url_fskip(pb, size);
426
        }
427
        bytes_read += size + 4;
428
    }
429
    package->type = MaterialPackage;
430
    return mxf_add_metadata_set(mxf, package);
431
}
432

    
433
static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
434
{
435
    ByteIOContext *pb = &mxf->fc->pb;
436
    MXFTrack *track = av_mallocz(sizeof(*track));
437
    int bytes_read = 0;
438

    
439
    while (bytes_read < klv->length) {
440
        int tag = get_be16(pb);
441
        int size = get_be16(pb); /* KLV specified by 0x53 */
442

    
443
        dprintf("tag 0x%04X, size %d\n", tag, size);
444
        switch (tag) {
445
        case 0x3C0A:
446
            get_buffer(pb, track->uid, 16);
447
            break;
448
        case 0x4801:
449
            track->track_id = get_be32(pb);
450
            break;
451
        case 0x4804:
452
            get_buffer(pb, track->track_number, 4);
453
            break;
454
        case 0x4B01:
455
            track->edit_rate.den = get_be32(pb);
456
            track->edit_rate.num = get_be32(pb);
457
            break;
458
        case 0x4803:
459
            get_buffer(pb, track->sequence_ref, 16);
460
            break;
461
        default:
462
            url_fskip(pb, size);
463
        }
464
        bytes_read += size + 4;
465
    }
466
    track->type = Track;
467
    return mxf_add_metadata_set(mxf, track);
468
}
469

    
470
static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
471
{
472
    ByteIOContext *pb = &mxf->fc->pb;
473
    MXFSequence *sequence = av_mallocz(sizeof(*sequence));
474
    int bytes_read = 0;
475

    
476
    while (bytes_read < klv->length) {
477
        int tag = get_be16(pb);
478
        int size = get_be16(pb); /* KLV specified by 0x53 */
479

    
480
        dprintf("tag 0x%04X, size %d\n", tag, size);
481
        switch (tag) {
482
        case 0x3C0A:
483
            get_buffer(pb, sequence->uid, 16);
484
            break;
485
        case 0x0202:
486
            sequence->duration = get_be64(pb);
487
            break;
488
        case 0x0201:
489
            get_buffer(pb, sequence->data_definition_ul, 16);
490
            break;
491
        case 0x1001:
492
            sequence->structural_components_count = get_be32(pb);
493
            if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
494
                return -1;
495
            sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
496
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
497
            get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
498
            break;
499
        default:
500
            url_fskip(pb, size);
501
        }
502
        bytes_read += size + 4;
503
    }
504
    sequence->type = Sequence;
505
    return mxf_add_metadata_set(mxf, sequence);
506
}
507

    
508
static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
509
{
510
    ByteIOContext *pb = &mxf->fc->pb;
511
    MXFPackage *package = av_mallocz(sizeof(*package));
512
    int bytes_read = 0;
513

    
514
    while (bytes_read < klv->length) {
515
        int tag = get_be16(pb);
516
        int size = get_be16(pb); /* KLV specified by 0x53 */
517

    
518
        dprintf("tag 0x%04X, size %d\n", tag, size);
519
        switch (tag) {
520
        case 0x3C0A:
521
            get_buffer(pb, package->uid, 16);
522
            break;
523
        case 0x4403:
524
            package->tracks_count = get_be32(pb);
525
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
526
                return -1;
527
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
528
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
529
            get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
530
            break;
531
        case 0x4401:
532
            /* UMID, only get last 16 bytes */
533
            url_fskip(pb, 16);
534
            get_buffer(pb, package->package_uid, 16);
535
            break;
536
        case 0x4701:
537
            get_buffer(pb, package->descriptor_ref, 16);
538
            break;
539
        default:
540
            url_fskip(pb, size);
541
        }
542
        bytes_read += size + 4;
543
    }
544
    package->type = SourcePackage;
545
    return mxf_add_metadata_set(mxf, package);
546
}
547

    
548
static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
549
{
550
    ByteIOContext *pb = &mxf->fc->pb;
551
    MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
552
    int bytes_read = 0;
553

    
554
    while (bytes_read < klv->length) {
555
        int tag = get_be16(pb);
556
        int size = get_be16(pb); /* KLV specified by 0x53 */
557

    
558
        dprintf("tag 0x%04X, size %d\n", tag, size);
559
        switch (tag) {
560
        case 0x3C0A:
561
            get_buffer(pb, descriptor->uid, 16);
562
            break;
563
        case 0x3F01:
564
            descriptor->sub_descriptors_count = get_be32(pb);
565
            if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
566
                return -1;
567
            descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
568
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
569
            get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
570
            break;
571
        default:
572
            url_fskip(pb, size);
573
        }
574
        bytes_read += size + 4;
575
    }
576
    descriptor->type = MultipleDescriptor;
577
    return mxf_add_metadata_set(mxf, descriptor);
578
}
579

    
580
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
581
{
582
    int code;
583

    
584
    do {
585
        code = get_byte(pb);
586
        dprintf("pixel layout: code 0x%x\n", code);
587
        switch (code) {
588
        case 0x52: /* R */
589
            descriptor->bits_per_sample += get_byte(pb);
590
            break;
591
        case 0x47: /* G */
592
            descriptor->bits_per_sample += get_byte(pb);
593
            break;
594
        case 0x42: /* B */
595
            descriptor->bits_per_sample += get_byte(pb);
596
            break;
597
        default:
598
            get_byte(pb);
599
        }
600
    } while (code != 0); /* SMPTE 377M E.2.46 */
601
}
602

    
603
static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
604
{
605
    ByteIOContext *pb = &mxf->fc->pb;
606
    MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
607
    int bytes_read = 0;
608

    
609
    while (bytes_read < klv->length) {
610
        int tag = get_be16(pb);
611
        int size = get_be16(pb); /* KLV specified by 0x53 */
612

    
613
        dprintf("tag 0x%04X, size %d\n", tag, size);
614
        switch (tag) {
615
        case 0x3C0A:
616
            get_buffer(pb, descriptor->uid, 16);
617
            break;
618
        case 0x3004:
619
            get_buffer(pb, descriptor->essence_container_ul, 16);
620
            break;
621
        case 0x3006:
622
            descriptor->linked_track_id = get_be32(pb);
623
            break;
624
        case 0x3201: /* PictureEssenceCoding */
625
            get_buffer(pb, descriptor->essence_codec_ul, 16);
626
            break;
627
        case 0x3203:
628
            descriptor->width = get_be32(pb);
629
            break;
630
        case 0x3202:
631
            descriptor->height = get_be32(pb);
632
            break;
633
        case 0x320E:
634
            descriptor->aspect_ratio.num = get_be32(pb);
635
            descriptor->aspect_ratio.den = get_be32(pb);
636
            break;
637
        case 0x3D03:
638
            descriptor->sample_rate.num = get_be32(pb);
639
            descriptor->sample_rate.den = get_be32(pb);
640
            break;
641
        case 0x3D06: /* SoundEssenceCompression */
642
            get_buffer(pb, descriptor->essence_codec_ul, 16);
643
            break;
644
        case 0x3D07:
645
            descriptor->channels = get_be32(pb);
646
            break;
647
        case 0x3D01:
648
            descriptor->bits_per_sample = get_be32(pb);
649
            break;
650
        case 0x3401:
651
            mxf_read_metadata_pixel_layout(pb, descriptor);
652
            break;
653
        case 0x8201: /* Private tag used by SONY C0023S01.mxf */
654
            descriptor->extradata = av_malloc(size);
655
            descriptor->extradata_size = size;
656
            get_buffer(pb, descriptor->extradata, size);
657
            break;
658
        default:
659
            url_fskip(pb, size);
660
        }
661
        bytes_read += size + 4;
662
    }
663
    descriptor->type = Descriptor;
664
    return mxf_add_metadata_set(mxf, descriptor);
665
}
666

    
667
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
668
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
669
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
670
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
671
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
672
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
673
};
674

    
675
static const MXFCodecUL mxf_codec_uls[] = {
676
    /* PictureEssenceCoding */
677
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
678
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
679
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
680
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
681
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
682
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
683
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
684
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
685
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
686
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
687
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
688
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
689
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
690
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
691
    /* SoundEssenceCompression */
692
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
693
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
694
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 },  CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
695
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
696
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */
697
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
698
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
699
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
700
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
701
};
702

    
703
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
704
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
705
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
706
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
707
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
708
};
709

    
710
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
711
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
712
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
713
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
714
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
715
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 },        CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
716
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
717
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */
718
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
719
};
720

    
721
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
722
{
723
    while (uls->id != CODEC_ID_NONE) {
724
        if(!memcmp(uls->uid, *uid, 16))
725
            break;
726
        uls++;
727
    }
728
    return uls;
729
}
730

    
731
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
732
{
733
    while (uls->type != CODEC_TYPE_DATA) {
734
        if(!memcmp(uls->uid, *uid, 16))
735
            break;
736
        uls++;
737
    }
738
    return uls->type;
739
}
740

    
741
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref)
742
{
743
    int i;
744

    
745
    if (!strong_ref)
746
        return NULL;
747
    for (i = 0; i < mxf->metadata_sets_count; i++) {
748
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16)) {
749
            return mxf->metadata_sets[i];
750
        }
751
    }
752
    return NULL;
753
}
754

    
755
static int mxf_parse_structural_metadata(MXFContext *mxf)
756
{
757
    MXFPackage *material_package = NULL;
758
    MXFPackage *source_package = NULL;
759
    MXFPackage *temp_package = NULL;
760
    int i, j, k;
761

    
762
    dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
763
    /* TODO: handle multiple material packages (OP3x) */
764
    for (i = 0; i < mxf->packages_count; i++) {
765
        if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i]))) {
766
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve package strong ref\n");
767
            return -1;
768
        }
769
        if (temp_package->type == MaterialPackage) {
770
            material_package = temp_package;
771
            break;
772
        }
773
    }
774
    if (!material_package) {
775
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
776
        return -1;
777
    }
778

    
779
    for (i = 0; i < material_package->tracks_count; i++) {
780
        MXFTrack *material_track = NULL;
781
        MXFTrack *source_track = NULL;
782
        MXFTrack *temp_track = NULL;
783
        MXFDescriptor *descriptor = NULL;
784
        MXFStructuralComponent *component = NULL;
785
        const MXFCodecUL *codec_ul = NULL;
786
        const MXFCodecUL *container_ul = NULL;
787
        AVStream *st;
788

    
789
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i]))) {
790
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
791
            continue;
792
        }
793

    
794
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref))) {
795
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
796
            return -1;
797
        }
798

    
799
        /* TODO: handle multiple source clips */
800
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
801
            /* TODO: handle timecode component */
802
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j]);
803
            if (!component || component->type != SourceClip)
804
                continue;
805

    
806
            for (k = 0; k < mxf->packages_count; k++) {
807
                if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k]))) {
808
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
809
                    return -1;
810
                }
811
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
812
                    source_package = temp_package;
813
                    break;
814
                }
815
            }
816
            if (!source_package) {
817
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
818
                break;
819
            }
820
            for (k = 0; k < source_package->tracks_count; k++) {
821
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k]))) {
822
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
823
                    return -1;
824
                }
825
                if (temp_track->track_id == component->source_track_id) {
826
                    source_track = temp_track;
827
                    break;
828
                }
829
            }
830
            if (!source_track) {
831
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
832
                break;
833
            }
834
        }
835
        if (!source_track)
836
            continue;
837

    
838
        st = av_new_stream(mxf->fc, source_track->track_id);
839
        st->priv_data = source_track;
840
        st->duration = component->duration;
841
        if (st->duration == -1)
842
            st->duration = AV_NOPTS_VALUE;
843
        st->start_time = component->start_position;
844
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
845

    
846
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref))) {
847
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
848
            return -1;
849
        }
850

    
851
#ifdef DEBUG
852
        PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
853
#endif
854
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
855

    
856
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref);
857
        if (source_package->descriptor) {
858
            if (source_package->descriptor->type == MultipleDescriptor) {
859
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
860
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j]);
861

    
862
                    if (!sub_descriptor) {
863
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
864
                        continue;
865
                    }
866
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
867
                        descriptor = sub_descriptor;
868
                        break;
869
                    }
870
                }
871
            } else
872
                descriptor = source_package->descriptor;
873
        }
874
        if (!descriptor) {
875
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
876
            continue;
877
        }
878
#ifdef DEBUG
879
        PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
880
        PRINT_KEY("essence container ul", descriptor->essence_container_ul);
881
#endif
882
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
883
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
884
        st->codec->codec_id = codec_ul->id;
885
        if (descriptor->extradata) {
886
            st->codec->extradata = descriptor->extradata;
887
            st->codec->extradata_size = descriptor->extradata_size;
888
        }
889
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
890
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
891
            if (st->codec->codec_id == CODEC_ID_NONE)
892
                st->codec->codec_id = container_ul->id;
893
            st->codec->width = descriptor->width;
894
            st->codec->height = descriptor->height;
895
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
896
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
897
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
898
            if (st->codec->codec_id == CODEC_ID_NONE)
899
                st->codec->codec_id = container_ul->id;
900
            st->codec->channels = descriptor->channels;
901
            st->codec->bits_per_sample = descriptor->bits_per_sample;
902
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
903
            /* TODO: implement CODEC_ID_RAWAUDIO */
904
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
905
                if (descriptor->bits_per_sample == 24)
906
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
907
                else if (descriptor->bits_per_sample == 32)
908
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
909
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
910
                if (descriptor->bits_per_sample == 24)
911
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
912
                else if (descriptor->bits_per_sample == 32)
913
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
914
                if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
915
                    st->codec->channels = 8; /* force channels to 8 */
916
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
917
                st->need_parsing = 1;
918
            }
919
        }
920
        if (container_ul && container_ul->wrapping == Clip) {
921
            dprintf("stream %d: clip wrapped essence\n", st->index);
922
            st->need_parsing = 1;
923
        }
924
    }
925
    return 0;
926
}
927

    
928
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
929
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
930
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
931
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
932
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
933
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
934
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
935
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
936
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
937
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
938
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
939
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
940
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
941
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
942
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
943
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
944
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
945
};
946

    
947
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
948
{
949
    int i, b;
950
    for (i = 0; i < size && !url_feof(pb); i++) {
951
        b = get_byte(pb);
952
        if (b == key[0])
953
            i = 0;
954
        else if (b != key[i])
955
            i = -1;
956
    }
957
    return i == size;
958
}
959

    
960
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
961
{
962
    MXFContext *mxf = s->priv_data;
963
    KLVPacket klv;
964

    
965
    if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
966
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
967
        return -1;
968
    }
969
    url_fseek(&s->pb, -14, SEEK_CUR);
970
    mxf->fc = s;
971
    while (!url_feof(&s->pb)) {
972
        const MXFMetadataReadTableEntry *function;
973

    
974
        if (klv_read_packet(&klv, &s->pb) < 0) {
975
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
976
            return -1;
977
        }
978
#ifdef DEBUG
979
        PRINT_KEY("read header", klv.key);
980
#endif
981
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
982
            /* FIXME avoid seek */
983
            url_fseek(&s->pb, klv.offset, SEEK_SET);
984
            break;
985
        }
986

    
987
        for (function = mxf_metadata_read_table; function->read; function++) {
988
            if (IS_KLV_KEY(klv.key, function->key)) {
989
                if (function->read(mxf, &klv) < 0) {
990
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
991
                    return -1;
992
                }
993
                break;
994
            }
995
        }
996
        if (!function->read)
997
            url_fskip(&s->pb, klv.length);
998
    }
999
    return mxf_parse_structural_metadata(mxf);
1000
}
1001

    
1002
static int mxf_read_close(AVFormatContext *s)
1003
{
1004
    MXFContext *mxf = s->priv_data;
1005
    int i;
1006

    
1007
    av_freep(&mxf->packages_refs);
1008
    av_freep(&mxf->essence_container_data_sets_refs);
1009
    av_freep(&mxf->essence_containers_uls);
1010
    for (i = 0; i < mxf->metadata_sets_count; i++) {
1011
        switch (mxf->metadata_sets[i]->type) {
1012
        case MultipleDescriptor:
1013
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1014
            break;
1015
        case Sequence:
1016
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1017
            break;
1018
        case SourcePackage:
1019
        case MaterialPackage:
1020
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1021
            break;
1022
        default:
1023
            break;
1024
        }
1025
        av_freep(&mxf->metadata_sets[i]);
1026
    }
1027
    av_freep(&mxf->metadata_sets);
1028
    return 0;
1029
}
1030

    
1031
static int mxf_probe(AVProbeData *p) {
1032
    uint8_t *bufp = p->buf;
1033
    uint8_t *end = p->buf + p->buf_size;
1034

    
1035
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1036
        return 0;
1037

    
1038
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1039
    end -= sizeof(mxf_header_partition_pack_key);
1040
    for (; bufp < end; bufp++) {
1041
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1042
            return AVPROBE_SCORE_MAX;
1043
    }
1044
    return 0;
1045
}
1046

    
1047
/* rudimentary binary seek */
1048
/* XXX: use MXF Index */
1049
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1050
{
1051
    AVStream *st = s->streams[stream_index];
1052
    int64_t seconds;
1053

    
1054
    if (!s->bit_rate)
1055
        return -1;
1056
    if (sample_time < 0)
1057
        sample_time = 0;
1058
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1059
    url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1060
    if (!mxf_read_sync(&s->pb, mxf_essence_element_key, 12))
1061
        return -1;
1062

    
1063
    /* found KLV key */
1064
    url_fseek(&s->pb, -12, SEEK_CUR);
1065
    av_update_cur_dts(s, st, sample_time);
1066
    return 0;
1067
}
1068

    
1069
AVInputFormat mxf_demuxer = {
1070
    "mxf",
1071
    "MXF format",
1072
    sizeof(MXFContext),
1073
    mxf_probe,
1074
    mxf_read_header,
1075
    mxf_read_packet,
1076
    mxf_read_close,
1077
    mxf_read_seek,
1078
};