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1
/*
2
 * MXF demuxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
4
 *
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 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9
 *
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 * This library is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
19

    
20
/*
21
 * References
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 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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 * SMPTE 377M MXF File Format Specifications
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 * SMPTE 378M Operational Pattern 1a
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 * SMPTE 379M MXF Generic Container
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 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
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 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
29
 *
30
 * Principle
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 * Search for Track numbers which will identify essence element KLV packets.
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 * Search for SourcePackage which define tracks which contains Track numbers.
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 * Material Package contains tracks with reference to SourcePackage tracks.
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 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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 * Assign Descriptors to correct Tracks.
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 *
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 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
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 * Metadata parsing resolves Strong References to objects.
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 *
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 * Simple demuxer, only OP1A supported and some files might not work at all.
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 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
42
 */
43

    
44
//#define DEBUG
45

    
46
#include "avformat.h"
47

    
48
typedef uint8_t UID[16];
49

    
50
enum MXFMetadataSetType {
51
    MaterialPackage,
52
    SourcePackage,
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    SourceClip,
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    TimecodeComponent,
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    Sequence,
56
    MultipleDescriptor,
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    Descriptor,
58
    Track,
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    EssenceContainerData,
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};
61

    
62
typedef struct MXFStructuralComponent {
63
    UID uid;
64
    enum MXFMetadataSetType type;
65
    UID source_package_uid;
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    UID data_definition_ul;
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    int64_t duration;
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    int64_t start_position;
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    int source_track_id;
70
} MXFStructuralComponent;
71

    
72
typedef struct MXFSequence {
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    UID uid;
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    enum MXFMetadataSetType type;
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    UID data_definition_ul;
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    UID *structural_components_refs;
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    int structural_components_count;
78
    int64_t duration;
79
} MXFSequence;
80

    
81
typedef struct MXFTrack {
82
    UID uid;
83
    enum MXFMetadataSetType type;
84
    MXFSequence *sequence; /* mandatory, and only one */
85
    UID sequence_ref;
86
    int track_id;
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    uint8_t track_number[4];
88
    AVRational edit_rate;
89
} MXFTrack;
90

    
91
typedef struct MXFDescriptor {
92
    UID uid;
93
    enum MXFMetadataSetType type;
94
    UID essence_container_ul;
95
    UID essence_codec_ul;
96
    AVRational sample_rate;
97
    AVRational aspect_ratio;
98
    int width;
99
    int height;
100
    int channels;
101
    int bits_per_sample;
102
    UID *sub_descriptors_refs;
103
    int sub_descriptors_count;
104
    int linked_track_id;
105
    uint8_t *extradata;
106
    int extradata_size;
107
} MXFDescriptor;
108

    
109
typedef struct MXFPackage {
110
    UID uid;
111
    enum MXFMetadataSetType type;
112
    UID package_uid;
113
    UID *tracks_refs;
114
    int tracks_count;
115
    MXFDescriptor *descriptor; /* only one */
116
    UID descriptor_ref;
117
} MXFPackage;
118

    
119
typedef struct MXFEssenceContainerData {
120
    UID uid;
121
    enum MXFMetadataSetType type;
122
    UID linked_package_uid;
123
} MXFEssenceContainerData;
124

    
125
typedef struct {
126
    UID uid;
127
    enum MXFMetadataSetType type;
128
} MXFMetadataSet;
129

    
130
typedef struct MXFContext {
131
    UID *packages_refs;
132
    int packages_count;
133
    UID *essence_container_data_sets_refs;
134
    int essence_container_data_sets_count;
135
    UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
136
    int essence_containers_uls_count;
137
    UID operational_pattern_ul;
138
    UID content_storage_uid;
139
    MXFMetadataSet **metadata_sets;
140
    int metadata_sets_count;
141
    AVFormatContext *fc;
142
} MXFContext;
143

    
144
typedef struct KLVPacket {
145
    UID key;
146
    offset_t offset;
147
    uint64_t length;
148
} KLVPacket;
149

    
150
enum MXFWrappingScheme {
151
    Frame,
152
    Clip,
153
};
154

    
155
typedef struct MXFCodecUL {
156
    UID uid;
157
    enum CodecID id;
158
    enum MXFWrappingScheme wrapping;
159
} MXFCodecUL;
160

    
161
typedef struct MXFMetadataReadTableEntry {
162
    const UID key;
163
    int (*read)(MXFContext *mxf, KLVPacket *klv);
164
} MXFMetadataReadTableEntry;
165

    
166
/* partial keys to match */
167
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
168
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
169

    
170
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
171

    
172
#define PRINT_KEY(x) dprintf("%02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", \
173
                             (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])
174

    
175
static int64_t klv_decode_ber_length(ByteIOContext *pb)
176
{
177
    int64_t size = 0;
178
    uint8_t length = get_byte(pb);
179
    int type = length >> 7;
180

    
181
    if (type) { /* long form */
182
        int bytes_num = length & 0x7f;
183
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
184
        if (bytes_num > 8)
185
            return -1;
186
        while (bytes_num--)
187
            size = size << 8 | get_byte(pb);
188
    } else {
189
        size = length & 0x7f;
190
    }
191
    return size;
192
}
193

    
194
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
195
{
196
    klv->offset = url_ftell(pb);
197
    get_buffer(pb, klv->key, 16);
198
    klv->length = klv_decode_ber_length(pb);
199
    return klv->length == -1 ? -1 : 0;
200
}
201

    
202
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
203
{
204
    int i;
205

    
206
    for (i = 0; i < s->nb_streams; i++) {
207
        MXFTrack *track = s->streams[i]->priv_data;
208
         /* SMPTE 379M 7.3 */
209
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
210
            return i;
211
    }
212
    return -1;
213
}
214

    
215
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
216
{
217
    KLVPacket klv;
218

    
219
    while (!url_feof(&s->pb)) {
220
        if (klv_read_packet(&klv, &s->pb) < 0) {
221
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
222
            return -1;
223
        }
224
#ifdef DEBUG
225
        PRINT_KEY(klv.key);
226
#endif
227
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
228
            av_get_packet(&s->pb, pkt, klv.length);
229
            pkt->stream_index = mxf_get_stream_index(s, &klv);
230
            return pkt->stream_index == -1 ? -1 : 0;
231
        } else
232
            url_fskip(&s->pb, klv.length);
233
    }
234
    return AVERROR_IO;
235
}
236

    
237
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
238
{
239
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
240
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
241
    mxf->metadata_sets_count++;
242
    return 0;
243
}
244

    
245
static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
246
{
247
    ByteIOContext *pb = &mxf->fc->pb;
248
    int bytes_read = 0;
249

    
250
    while (bytes_read < klv->length) {
251
        int tag = get_be16(pb);
252
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
253

    
254
        switch (tag) {
255
        case 0x3B03:
256
            get_buffer(pb, mxf->content_storage_uid, 16);
257
            break;
258
        case 0x3B09:
259
            get_buffer(pb, mxf->operational_pattern_ul, 16);
260
            break;
261
        case 0x3B0A:
262
            mxf->essence_containers_uls_count = get_be32(pb);
263
            if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
264
                return -1;
265
            mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
266
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
267
            get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
268
            break;
269
        default:
270
            url_fskip(pb, size);
271
        }
272
        bytes_read += size + 4;
273
    }
274
    return 0;
275
}
276

    
277
static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
278
{
279
    ByteIOContext *pb = &mxf->fc->pb;
280
    int bytes_read = 0;
281

    
282
    while (bytes_read < klv->length) {
283
        int tag = get_be16(pb);
284
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
285

    
286
        dprintf("tag 0x%04X, size %d\n", tag, size);
287
        switch (tag) {
288
        case 0x1901:
289
            mxf->packages_count = get_be32(pb);
290
            if (mxf->packages_count >= UINT_MAX / sizeof(UID))
291
                return -1;
292
            mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
293
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
294
            get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
295
            break;
296
        case 0x1902:
297
            mxf->essence_container_data_sets_count = get_be32(pb);
298
            if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
299
                return -1;
300
            mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
301
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
302
            get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
303
            break;
304
        default:
305
            url_fskip(pb, size);
306
        }
307
        bytes_read += size + 4;
308
    }
309
    return 0;
310
}
311

    
312
static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
313
{
314
    ByteIOContext *pb = &mxf->fc->pb;
315
    MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
316
    int bytes_read = 0;
317

    
318
    while (bytes_read < klv->length) {
319
        int tag = get_be16(pb);
320
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
321

    
322
        bytes_read += size + 4;
323
        dprintf("tag 0x%04X, size %d\n", tag, size);
324
        if (!size) /* ignore empty tag, needed for some files with empty UMID tag */
325
            continue;
326
        switch (tag) {
327
        case 0x3C0A:
328
            get_buffer(pb, source_clip->uid, 16);
329
            break;
330
        case 0x0202:
331
            source_clip->duration = get_be64(pb);
332
            break;
333
        case 0x1201:
334
            source_clip->start_position = get_be64(pb);
335
            break;
336
        case 0x1101:
337
            /* UMID, only get last 16 bytes */
338
            url_fskip(pb, 16);
339
            get_buffer(pb, source_clip->source_package_uid, 16);
340
            break;
341
        case 0x1102:
342
            source_clip->source_track_id = get_be32(pb);
343
            break;
344
        default:
345
            url_fskip(pb, size);
346
        }
347
    }
348
    source_clip->type = SourceClip;
349
    return mxf_add_metadata_set(mxf, source_clip);
350
}
351

    
352
static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
353
{
354
    ByteIOContext *pb = &mxf->fc->pb;
355
    MXFPackage *package = av_mallocz(sizeof(*package));
356
    int bytes_read = 0;
357

    
358
    while (bytes_read < klv->length) {
359
        int tag = get_be16(pb);
360
        int size = get_be16(pb); /* KLV specified by 0x53 */
361

    
362
        switch (tag) {
363
        case 0x3C0A:
364
            get_buffer(pb, package->uid, 16);
365
            break;
366
        case 0x4403:
367
            package->tracks_count = get_be32(pb);
368
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
369
                return -1;
370
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
371
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
372
            get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
373
            break;
374
        default:
375
            url_fskip(pb, size);
376
        }
377
        bytes_read += size + 4;
378
    }
379
    package->type = MaterialPackage;
380
    return mxf_add_metadata_set(mxf, package);
381
}
382

    
383
static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
384
{
385
    ByteIOContext *pb = &mxf->fc->pb;
386
    MXFTrack *track = av_mallocz(sizeof(*track));
387
    int bytes_read = 0;
388

    
389
    while (bytes_read < klv->length) {
390
        int tag = get_be16(pb);
391
        int size = get_be16(pb); /* KLV specified by 0x53 */
392

    
393
        dprintf("tag 0x%04X, size %d\n", tag, size);
394
        switch (tag) {
395
        case 0x3C0A:
396
            get_buffer(pb, track->uid, 16);
397
            break;
398
        case 0x4801:
399
            track->track_id = get_be32(pb);
400
            break;
401
        case 0x4804:
402
            get_buffer(pb, track->track_number, 4);
403
            break;
404
        case 0x4B01:
405
            track->edit_rate.den = get_be32(pb);
406
            track->edit_rate.num = get_be32(pb);
407
            break;
408
        case 0x4803:
409
            get_buffer(pb, track->sequence_ref, 16);
410
            break;
411
        default:
412
            url_fskip(pb, size);
413
        }
414
        bytes_read += size + 4;
415
    }
416
    track->type = Track;
417
    return mxf_add_metadata_set(mxf, track);
418
}
419

    
420
static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
421
{
422
    ByteIOContext *pb = &mxf->fc->pb;
423
    MXFSequence *sequence = av_mallocz(sizeof(*sequence));
424
    int bytes_read = 0;
425

    
426
    while (bytes_read < klv->length) {
427
        int tag = get_be16(pb);
428
        int size = get_be16(pb); /* KLV specified by 0x53 */
429

    
430
        dprintf("tag 0x%04X, size %d\n", tag, size);
431
        switch (tag) {
432
        case 0x3C0A:
433
            get_buffer(pb, sequence->uid, 16);
434
            break;
435
        case 0x0202:
436
            sequence->duration = get_be64(pb);
437
            break;
438
        case 0x0201:
439
            get_buffer(pb, sequence->data_definition_ul, 16);
440
            break;
441
        case 0x1001:
442
            sequence->structural_components_count = get_be32(pb);
443
            if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
444
                return -1;
445
            sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
446
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
447
            get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
448
            break;
449
        default:
450
            url_fskip(pb, size);
451
        }
452
        bytes_read += size + 4;
453
    }
454
    sequence->type = Sequence;
455
    return mxf_add_metadata_set(mxf, sequence);
456
}
457

    
458
static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
459
{
460
    ByteIOContext *pb = &mxf->fc->pb;
461
    MXFPackage *package = av_mallocz(sizeof(*package));
462
    int bytes_read = 0;
463

    
464
    while (bytes_read < klv->length) {
465
        int tag = get_be16(pb);
466
        int size = get_be16(pb); /* KLV specified by 0x53 */
467

    
468
        dprintf("tag 0x%04X, size %d\n", tag, size);
469
        switch (tag) {
470
        case 0x3C0A:
471
            get_buffer(pb, package->uid, 16);
472
            break;
473
        case 0x4403:
474
            package->tracks_count = get_be32(pb);
475
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
476
                return -1;
477
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
478
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
479
            get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
480
            break;
481
        case 0x4401:
482
            /* UMID, only get last 16 bytes */
483
            url_fskip(pb, 16);
484
            get_buffer(pb, package->package_uid, 16);
485
            break;
486
        case 0x4701:
487
            get_buffer(pb, package->descriptor_ref, 16);
488
            break;
489
        default:
490
            url_fskip(pb, size);
491
        }
492
        bytes_read += size + 4;
493
    }
494
    package->type = SourcePackage;
495
    return mxf_add_metadata_set(mxf, package);
496
}
497

    
498
static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
499
{
500
    ByteIOContext *pb = &mxf->fc->pb;
501
    MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
502
    int bytes_read = 0;
503

    
504
    while (bytes_read < klv->length) {
505
        int tag = get_be16(pb);
506
        int size = get_be16(pb); /* KLV specified by 0x53 */
507

    
508
        dprintf("tag 0x%04X, size %d\n", tag, size);
509
        switch (tag) {
510
        case 0x3C0A:
511
            get_buffer(pb, descriptor->uid, 16);
512
            break;
513
        case 0x3F01:
514
            descriptor->sub_descriptors_count = get_be32(pb);
515
            if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
516
                return -1;
517
            descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
518
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
519
            get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
520
            break;
521
        default:
522
            url_fskip(pb, size);
523
        }
524
        bytes_read += size + 4;
525
    }
526
    descriptor->type = MultipleDescriptor;
527
    return mxf_add_metadata_set(mxf, descriptor);
528
}
529

    
530
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
531
{
532
    int code;
533

    
534
    do {
535
        code = get_byte(pb);
536
        dprintf("pixel layout: code 0x%x\n", code);
537
        switch (code) {
538
        case 0x52: /* R */
539
            descriptor->bits_per_sample += get_byte(pb);
540
            break;
541
        case 0x47: /* G */
542
            descriptor->bits_per_sample += get_byte(pb);
543
            break;
544
        case 0x42: /* B */
545
            descriptor->bits_per_sample += get_byte(pb);
546
            break;
547
        default:
548
            get_byte(pb);
549
        }
550
    } while (code != 0); /* SMPTE 377M E.2.46 */
551
}
552

    
553
static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
554
{
555
    ByteIOContext *pb = &mxf->fc->pb;
556
    MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
557
    int bytes_read = 0;
558

    
559
    while (bytes_read < klv->length) {
560
        int tag = get_be16(pb);
561
        int size = get_be16(pb); /* KLV specified by 0x53 */
562

    
563
        dprintf("tag 0x%04X, size %d\n", tag, size);
564
        switch (tag) {
565
        case 0x3C0A:
566
            get_buffer(pb, descriptor->uid, 16);
567
            break;
568
        case 0x3004:
569
            get_buffer(pb, descriptor->essence_container_ul, 16);
570
            break;
571
        case 0x3006:
572
            descriptor->linked_track_id = get_be32(pb);
573
            break;
574
        case 0x3201: /* PictureEssenceCoding */
575
            get_buffer(pb, descriptor->essence_codec_ul, 16);
576
            break;
577
        case 0x3203:
578
            descriptor->width = get_be32(pb);
579
            break;
580
        case 0x3202:
581
            descriptor->height = get_be32(pb);
582
            break;
583
        case 0x320E:
584
            descriptor->aspect_ratio.num = get_be32(pb);
585
            descriptor->aspect_ratio.den = get_be32(pb);
586
            break;
587
        case 0x3D03:
588
            descriptor->sample_rate.num = get_be32(pb);
589
            descriptor->sample_rate.den = get_be32(pb);
590
            break;
591
        case 0x3D06: /* SoundEssenceCompression */
592
            get_buffer(pb, descriptor->essence_codec_ul, 16);
593
            break;
594
        case 0x3D07:
595
            descriptor->channels = get_be32(pb);
596
            break;
597
        case 0x3D01:
598
            descriptor->bits_per_sample = get_be32(pb);
599
            break;
600
        case 0x3401:
601
            mxf_read_metadata_pixel_layout(pb, descriptor);
602
            break;
603
        case 0x8201: /* Private tag used by SONY C0023S01.mxf */
604
            descriptor->extradata = av_malloc(size);
605
            descriptor->extradata_size = size;
606
            get_buffer(pb, descriptor->extradata, size);
607
            break;
608
        default:
609
            url_fskip(pb, size);
610
        }
611
        bytes_read += size + 4;
612
    }
613
    descriptor->type = Descriptor;
614
    return mxf_add_metadata_set(mxf, descriptor);
615
}
616

    
617
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
618
static const UID picture_essence_track_ul = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 };
619
static const UID sound_essence_track_ul   = { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 };
620

    
621
static const MXFCodecUL mxf_codec_uls[] = {
622
    /* PictureEssenceCoding */
623
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
624
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
625
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
626
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
627
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
628
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
629
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
630
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
631
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
632
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
633
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
634
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
635
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
636
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
637
    /* SoundEssenceCompression */
638
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
639
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
640
    { { 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 */
641
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
642
    { { 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 */
643
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
644
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
645
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
646
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
647
};
648

    
649
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
650
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
651
    { { 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 */
652
    { { 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 */
653
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
654
};
655

    
656
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
657
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
658
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
659
    { { 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 */
660
    { { 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 */
661
    { { 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 */
662
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },   CODEC_ID_PCM_AES3, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
663
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
664
};
665

    
666
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
667
{
668
    while (uls->id != CODEC_ID_NONE) {
669
        if(!memcmp(uls->uid, *uid, 16))
670
            break;
671
        uls++;
672
    }
673
    return uls;
674
}
675

    
676
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref)
677
{
678
    int i;
679

    
680
    if (!strong_ref)
681
        return NULL;
682
    for (i = 0; i < mxf->metadata_sets_count; i++) {
683
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16)) {
684
            return mxf->metadata_sets[i];
685
        }
686
    }
687
    return NULL;
688
}
689

    
690
static int mxf_parse_structural_metadata(MXFContext *mxf)
691
{
692
    MXFPackage *material_package = NULL;
693
    MXFPackage *source_package = NULL;
694
    MXFPackage *temp_package = NULL;
695
    int i, j, k;
696

    
697
    dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
698
    /* TODO: handle multiple material packages (OP3x) */
699
    for (i = 0; i < mxf->packages_count; i++) {
700
        if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i]))) {
701
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve package strong ref\n");
702
            return -1;
703
        }
704
        if (temp_package->type == MaterialPackage) {
705
            material_package = temp_package;
706
            break;
707
        }
708
    }
709
    if (!material_package) {
710
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
711
        return -1;
712
    }
713

    
714
    for (i = 0; i < material_package->tracks_count; i++) {
715
        MXFTrack *material_track = NULL;
716
        MXFTrack *source_track = NULL;
717
        MXFTrack *temp_track = NULL;
718
        MXFDescriptor *descriptor = NULL;
719
        MXFStructuralComponent *component = NULL;
720
        const MXFCodecUL *codec_ul = NULL;
721
        const MXFCodecUL *container_ul = NULL;
722
        AVStream *st;
723

    
724
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i]))) {
725
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
726
            continue;
727
        }
728

    
729
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref))) {
730
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
731
            return -1;
732
        }
733

    
734
        /* TODO: handle multiple source clips */
735
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
736
            /* TODO: handle timecode component */
737
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j]);
738
            if (!component || component->type != SourceClip)
739
                continue;
740

    
741
            for (k = 0; k < mxf->packages_count; k++) {
742
                if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k]))) {
743
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
744
                    return -1;
745
                }
746
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
747
                    source_package = temp_package;
748
                    break;
749
                }
750
            }
751
            if (!source_package) {
752
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
753
                break;
754
            }
755
            for (k = 0; k < source_package->tracks_count; k++) {
756
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k]))) {
757
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
758
                    return -1;
759
                }
760
                if (temp_track->track_id == component->source_track_id) {
761
                    source_track = temp_track;
762
                    break;
763
                }
764
            }
765
            if (!source_track) {
766
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
767
                break;
768
            }
769
        }
770
        if (!source_track)
771
            continue;
772

    
773
        st = av_new_stream(mxf->fc, source_track->track_id);
774
        st->priv_data = source_track;
775
        st->duration = component->duration;
776
        if (st->duration == -1)
777
            st->duration = AV_NOPTS_VALUE;
778
        st->start_time = component->start_position;
779
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
780

    
781
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref))) {
782
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
783
            return -1;
784
        }
785

    
786
#ifdef DEBUG
787
        PRINT_KEY(source_track->sequence->data_definition_ul);
788
#endif
789
        if (!memcmp(source_track->sequence->data_definition_ul, picture_essence_track_ul, 16))
790
            st->codec->codec_type = CODEC_TYPE_VIDEO;
791
        else if (!memcmp(source_track->sequence->data_definition_ul, sound_essence_track_ul, 16))
792
            st->codec->codec_type = CODEC_TYPE_AUDIO;
793
        else
794
            st->codec->codec_type = CODEC_TYPE_DATA;
795

    
796
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref);
797
        if (source_package->descriptor) {
798
            if (source_package->descriptor->type == MultipleDescriptor) {
799
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
800
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j]);
801

    
802
                    if (!sub_descriptor) {
803
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
804
                        continue;
805
                    }
806
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
807
                        descriptor = sub_descriptor;
808
                        break;
809
                    }
810
                }
811
            } else
812
                descriptor = source_package->descriptor;
813
        }
814
        if (!descriptor) {
815
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
816
            continue;
817
        }
818
#ifdef DEBUG
819
        PRINT_KEY(descriptor->essence_codec_ul);
820
        PRINT_KEY(descriptor->essence_container_ul);
821
#endif
822
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
823
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
824
        st->codec->codec_id = codec_ul->id;
825
        if (descriptor->extradata) {
826
            st->codec->extradata = descriptor->extradata;
827
            st->codec->extradata_size = descriptor->extradata_size;
828
        }
829
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
830
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
831
            if (st->codec->codec_id == CODEC_ID_NONE)
832
                st->codec->codec_id = container_ul->id;
833
            st->codec->width = descriptor->width;
834
            st->codec->height = descriptor->height;
835
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
836
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
837
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
838
            if (st->codec->codec_id == CODEC_ID_NONE)
839
                st->codec->codec_id = container_ul->id;
840
            st->codec->channels = descriptor->channels;
841
            st->codec->bits_per_sample = descriptor->bits_per_sample;
842
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
843
            /* TODO: implement CODEC_ID_RAWAUDIO */
844
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
845
                if (descriptor->bits_per_sample == 24)
846
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
847
                else if (descriptor->bits_per_sample == 32)
848
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
849
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
850
                if (descriptor->bits_per_sample == 24)
851
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
852
                else if (descriptor->bits_per_sample == 32)
853
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
854
            }
855
        }
856
        if (container_ul && container_ul->wrapping == Clip) {
857
            dprintf("stream %d: clip wrapped essence\n", st->index);
858
            st->need_parsing = 1;
859
        }
860
    }
861
    return 0;
862
}
863

    
864
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
865
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
866
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
867
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
868
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
869
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
870
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
871
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
872
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
873
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
874
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
875
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
876
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
877
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
878
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
879
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
880
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
881
};
882

    
883
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
884
{
885
    MXFContext *mxf = s->priv_data;
886
    KLVPacket klv;
887

    
888
    mxf->fc = s;
889
    while (!url_feof(&s->pb)) {
890
        const MXFMetadataReadTableEntry *function;
891

    
892
        if (klv_read_packet(&klv, &s->pb) < 0) {
893
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
894
            return -1;
895
        }
896
#ifdef DEBUG
897
        PRINT_KEY(klv.key);
898
#endif
899
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
900
            /* FIXME avoid seek */
901
            url_fseek(&s->pb, klv.offset, SEEK_SET);
902
            break;
903
        }
904

    
905
        for (function = mxf_metadata_read_table; function->read; function++) {
906
            if (IS_KLV_KEY(klv.key, function->key)) {
907
                if (function->read(mxf, &klv) < 0) {
908
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
909
                    return -1;
910
                }
911
                break;
912
            }
913
        }
914
        if (!function->read)
915
            url_fskip(&s->pb, klv.length);
916
    }
917
    return mxf_parse_structural_metadata(mxf);
918
}
919

    
920
static int mxf_read_close(AVFormatContext *s)
921
{
922
    MXFContext *mxf = s->priv_data;
923
    int i;
924

    
925
    av_freep(&mxf->packages_refs);
926
    av_freep(&mxf->essence_container_data_sets_refs);
927
    av_freep(&mxf->essence_containers_uls);
928
    for (i = 0; i < mxf->metadata_sets_count; i++) {
929
        switch (mxf->metadata_sets[i]->type) {
930
        case MultipleDescriptor:
931
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
932
            break;
933
        case Sequence:
934
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
935
            break;
936
        case SourcePackage:
937
        case MaterialPackage:
938
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
939
            break;
940
        default:
941
            break;
942
        }
943
        av_freep(&mxf->metadata_sets[i]);
944
    }
945
    av_freep(&mxf->metadata_sets);
946
    return 0;
947
}
948

    
949
static int mxf_probe(AVProbeData *p) {
950
    uint8_t *bufp = p->buf;
951
    uint8_t *end = p->buf + p->buf_size;
952

    
953
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
954
        return 0;
955

    
956
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
957
    end -= sizeof(mxf_header_partition_pack_key);
958
    for (; bufp < end; bufp++) {
959
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
960
            return AVPROBE_SCORE_MAX;
961
    }
962
    return 0;
963
}
964

    
965

    
966
AVInputFormat mxf_demuxer = {
967
    "mxf",
968
    "MXF format",
969
    sizeof(MXFContext),
970
    mxf_probe,
971
    mxf_read_header,
972
    mxf_read_packet,
973
    mxf_read_close,
974
    NULL,
975
};