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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
 *
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.
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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 FFmpeg; 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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 */
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
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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
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.
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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.
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
#include "aes.h"
50

    
51
typedef uint8_t UID[16];
52

    
53
enum MXFMetadataSetType {
54
    AnyType,
55
    MaterialPackage,
56
    SourcePackage,
57
    SourceClip,
58
    TimecodeComponent,
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    Sequence,
60
    MultipleDescriptor,
61
    Descriptor,
62
    Track,
63
    EssenceContainerData,
64
    CryptoContext,
65
};
66

    
67
typedef struct MXFCryptoContext {
68
    UID uid;
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    enum MXFMetadataSetType type;
70
    UID context_uid;
71
    UID source_container_ul;
72
} MXFCryptoContext;
73

    
74
typedef struct MXFStructuralComponent {
75
    UID uid;
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    enum MXFMetadataSetType type;
77
    UID source_package_uid;
78
    UID data_definition_ul;
79
    int64_t duration;
80
    int64_t start_position;
81
    int source_track_id;
82
} MXFStructuralComponent;
83

    
84
typedef struct MXFSequence {
85
    UID uid;
86
    enum MXFMetadataSetType type;
87
    UID data_definition_ul;
88
    UID *structural_components_refs;
89
    int structural_components_count;
90
    int64_t duration;
91
} MXFSequence;
92

    
93
typedef struct MXFTrack {
94
    UID uid;
95
    enum MXFMetadataSetType type;
96
    MXFSequence *sequence; /* mandatory, and only one */
97
    UID sequence_ref;
98
    int track_id;
99
    uint8_t track_number[4];
100
    AVRational edit_rate;
101
} MXFTrack;
102

    
103
typedef struct MXFDescriptor {
104
    UID uid;
105
    enum MXFMetadataSetType type;
106
    UID essence_container_ul;
107
    UID essence_codec_ul;
108
    AVRational sample_rate;
109
    AVRational aspect_ratio;
110
    int width;
111
    int height;
112
    int channels;
113
    int bits_per_sample;
114
    UID *sub_descriptors_refs;
115
    int sub_descriptors_count;
116
    int linked_track_id;
117
    uint8_t *extradata;
118
    int extradata_size;
119
} MXFDescriptor;
120

    
121
typedef struct MXFPackage {
122
    UID uid;
123
    enum MXFMetadataSetType type;
124
    UID package_uid;
125
    UID *tracks_refs;
126
    int tracks_count;
127
    MXFDescriptor *descriptor; /* only one */
128
    UID descriptor_ref;
129
} MXFPackage;
130

    
131
typedef struct MXFEssenceContainerData {
132
    UID uid;
133
    enum MXFMetadataSetType type;
134
    UID linked_package_uid;
135
} MXFEssenceContainerData;
136

    
137
typedef struct {
138
    UID uid;
139
    enum MXFMetadataSetType type;
140
} MXFMetadataSet;
141

    
142
typedef struct MXFContext {
143
    UID *packages_refs;
144
    int packages_count;
145
    MXFMetadataSet **metadata_sets;
146
    int metadata_sets_count;
147
    const uint8_t *sync_key;
148
    AVFormatContext *fc;
149
    struct AVAES *aesc;
150
} MXFContext;
151

    
152
typedef struct KLVPacket {
153
    UID key;
154
    offset_t offset;
155
    uint64_t length;
156
} KLVPacket;
157

    
158
enum MXFWrappingScheme {
159
    Frame,
160
    Clip,
161
};
162

    
163
typedef struct MXFCodecUL {
164
    UID uid;
165
    enum CodecID id;
166
    enum MXFWrappingScheme wrapping;
167
} MXFCodecUL;
168

    
169
typedef struct MXFDataDefinitionUL {
170
    UID uid;
171
    enum CodecType type;
172
} MXFDataDefinitionUL;
173

    
174
typedef struct MXFMetadataReadTableEntry {
175
    const UID key;
176
    int (*read)();
177
    int ctx_size;
178
    enum MXFMetadataSetType type;
179
} MXFMetadataReadTableEntry;
180

    
181
/* partial keys to match */
182
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
183
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
184
/* complete keys to match */
185
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
186
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
187

    
188
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
189

    
190
#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, \
191
                             (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])
192

    
193
static int64_t klv_decode_ber_length(ByteIOContext *pb)
194
{
195
    uint64_t size = get_byte(pb);
196
    if (size & 0x80) { /* long form */
197
        int bytes_num = size & 0x7f;
198
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
199
        if (bytes_num > 8)
200
            return -1;
201
        size = 0;
202
        while (bytes_num--)
203
            size = size << 8 | get_byte(pb);
204
    }
205
    return size;
206
}
207

    
208
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
209
{
210
    klv->offset = url_ftell(pb);
211
    get_buffer(pb, klv->key, 16);
212
    klv->length = klv_decode_ber_length(pb);
213
    return klv->length == -1 ? -1 : 0;
214
}
215

    
216
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
217
{
218
    int i;
219

    
220
    for (i = 0; i < s->nb_streams; i++) {
221
        MXFTrack *track = s->streams[i]->priv_data;
222
        /* SMPTE 379M 7.3 */
223
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
224
            return i;
225
    }
226
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
227
    return s->nb_streams == 1 ? 0 : -1;
228
}
229

    
230
/* XXX: use AVBitStreamFilter */
231
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
232
{
233
    uint8_t buffer[61444];
234
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
235

    
236
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
237
        return -1;
238
    get_buffer(pb, buffer, length);
239
    av_new_packet(pkt, length);
240
    data_ptr = pkt->data;
241
    end_ptr = buffer + length;
242
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
243
    for (; buf_ptr < end_ptr; buf_ptr += 4) {
244
        if (st->codec->bits_per_sample == 24) {
245
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
246
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
247
            data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
248
            data_ptr += 3;
249
        } else {
250
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
251
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
252
            data_ptr += 2;
253
        }
254
    }
255
    pkt->size = data_ptr - pkt->data;
256
    return 0;
257
}
258

    
259
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
260
{
261
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
262
    MXFContext *mxf = s->priv_data;
263
    ByteIOContext *pb = &s->pb;
264
    offset_t end = url_ftell(pb) + klv->length;
265
    uint64_t size;
266
    uint64_t orig_size;
267
    uint64_t plaintext_size;
268
    uint8_t ivec[16];
269
    uint8_t tmpbuf[16];
270
    int index;
271

    
272
    if (!mxf->aesc && s->key && s->keylen == 16) {
273
        mxf->aesc = av_malloc(av_aes_size);
274
        av_aes_init(mxf->aesc, s->key, 128, 1);
275
    }
276
    // crypto context
277
    url_fskip(pb, klv_decode_ber_length(pb));
278
    // plaintext offset
279
    klv_decode_ber_length(pb);
280
    plaintext_size = get_be64(pb);
281
    // source klv key
282
    klv_decode_ber_length(pb);
283
    get_buffer(pb, klv->key, 16);
284
    if (!IS_KLV_KEY(klv, mxf_essence_element_key)) goto err_out;
285
    index = mxf_get_stream_index(s, klv);
286
    if (index < 0) goto err_out;
287
    // source size
288
    klv_decode_ber_length(pb);
289
    orig_size = get_be64(pb);
290
    if (orig_size < plaintext_size) goto err_out;
291
    // enc. code
292
    size = klv_decode_ber_length(pb);
293
    if (size < 32 || size - 32 < orig_size) goto err_out;
294
    get_buffer(pb, ivec, 16);
295
    get_buffer(pb, tmpbuf, 16);
296
    if (mxf->aesc)
297
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
298
    if (memcmp(tmpbuf, checkv, 16))
299
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
300
    size -= 32;
301
    av_get_packet(pb, pkt, size);
302
    size -= plaintext_size;
303
    if (mxf->aesc)
304
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
305
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
306
    pkt->size = orig_size;
307
    pkt->stream_index = index;
308
    url_fskip(pb, end - url_ftell(pb));
309
    return 0;
310

    
311
err_out:
312
    url_fskip(pb, end - url_ftell(pb));
313
    return -1;
314
}
315

    
316
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
317
{
318
    MXFContext *mxf = s->priv_data;
319
    KLVPacket klv;
320

    
321
    while (!url_feof(&s->pb)) {
322
        if (klv_read_packet(&klv, &s->pb) < 0) {
323
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
324
            return -1;
325
        }
326
#ifdef DEBUG
327
        PRINT_KEY("read packet", klv.key);
328
#endif
329
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
330
            int res = mxf_decrypt_triplet(s, pkt, &klv);
331
            mxf->sync_key = mxf_encrypted_triplet_key;
332
            if (res < 0) {
333
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
334
                return -1;
335
            }
336
            return 0;
337
        }
338
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
339
            int index = mxf_get_stream_index(s, &klv);
340
            if (index < 0) {
341
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
342
                url_fskip(&s->pb, klv.length);
343
                return -1;
344
            }
345
            /* check for 8 channels AES3 element */
346
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
347
                if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
348
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
349
                    return -1;
350
                }
351
            } else
352
                av_get_packet(&s->pb, pkt, klv.length);
353
            pkt->stream_index = index;
354
            return 0;
355
        } else
356
            url_fskip(&s->pb, klv.length);
357
    }
358
    return AVERROR_IO;
359
}
360

    
361
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
362
{
363
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
364
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
365
    mxf->metadata_sets_count++;
366
    return 0;
367
}
368

    
369
static int mxf_read_metadata_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag)
370
{
371
    switch(tag) {
372
    case 0xFFFE:
373
        get_buffer(pb, cryptocontext->context_uid, 16);
374
        break;
375
    case 0xFFFD:
376
        get_buffer(pb, cryptocontext->source_container_ul, 16);
377
        break;
378
    }
379
    return 0;
380
}
381

    
382
static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
383
{
384
    switch (tag) {
385
    case 0x1901:
386
        mxf->packages_count = get_be32(pb);
387
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
388
            return -1;
389
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
390
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
391
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
392
        break;
393
    }
394
    return 0;
395
}
396

    
397
static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
398
{
399
    switch(tag) {
400
    case 0x0202:
401
        source_clip->duration = get_be64(pb);
402
        break;
403
    case 0x1201:
404
        source_clip->start_position = get_be64(pb);
405
        break;
406
    case 0x1101:
407
        /* UMID, only get last 16 bytes */
408
        url_fskip(pb, 16);
409
        get_buffer(pb, source_clip->source_package_uid, 16);
410
        break;
411
    case 0x1102:
412
        source_clip->source_track_id = get_be32(pb);
413
        break;
414
    }
415
    return 0;
416
}
417

    
418
static int mxf_read_metadata_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
419
{
420
    switch(tag) {
421
    case 0x4403:
422
        package->tracks_count = get_be32(pb);
423
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
424
            return -1;
425
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
426
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
427
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
428
        break;
429
    }
430
    return 0;
431
}
432

    
433
static int mxf_read_metadata_track(MXFTrack *track, ByteIOContext *pb, int tag)
434
{
435
    switch(tag) {
436
    case 0x4801:
437
        track->track_id = get_be32(pb);
438
        break;
439
    case 0x4804:
440
        get_buffer(pb, track->track_number, 4);
441
        break;
442
    case 0x4B01:
443
        track->edit_rate.den = get_be32(pb);
444
        track->edit_rate.num = get_be32(pb);
445
        break;
446
    case 0x4803:
447
        get_buffer(pb, track->sequence_ref, 16);
448
        break;
449
    }
450
    return 0;
451
}
452

    
453
static int mxf_read_metadata_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
454
{
455
    switch(tag) {
456
    case 0x0202:
457
        sequence->duration = get_be64(pb);
458
        break;
459
    case 0x0201:
460
        get_buffer(pb, sequence->data_definition_ul, 16);
461
        break;
462
    case 0x1001:
463
        sequence->structural_components_count = get_be32(pb);
464
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
465
            return -1;
466
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
467
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
468
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
469
        break;
470
    }
471
    return 0;
472
}
473

    
474
static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
475
{
476
    switch(tag) {
477
    case 0x4403:
478
        package->tracks_count = get_be32(pb);
479
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
480
            return -1;
481
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
482
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
483
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
484
        break;
485
    case 0x4401:
486
        /* UMID, only get last 16 bytes */
487
        url_fskip(pb, 16);
488
        get_buffer(pb, package->package_uid, 16);
489
        break;
490
    case 0x4701:
491
        get_buffer(pb, package->descriptor_ref, 16);
492
        break;
493
    }
494
    return 0;
495
}
496

    
497
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
498
{
499
    int code;
500

    
501
    do {
502
        code = get_byte(pb);
503
        dprintf("pixel layout: code 0x%x\n", code);
504
        switch (code) {
505
        case 0x52: /* R */
506
            descriptor->bits_per_sample += get_byte(pb);
507
            break;
508
        case 0x47: /* G */
509
            descriptor->bits_per_sample += get_byte(pb);
510
            break;
511
        case 0x42: /* B */
512
            descriptor->bits_per_sample += get_byte(pb);
513
            break;
514
        default:
515
            get_byte(pb);
516
        }
517
    } while (code != 0); /* SMPTE 377M E.2.46 */
518
}
519

    
520
static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
521
{
522
    switch(tag) {
523
    case 0x3F01:
524
        descriptor->sub_descriptors_count = get_be32(pb);
525
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
526
            return -1;
527
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
528
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
529
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
530
        break;
531
    case 0x3004:
532
        get_buffer(pb, descriptor->essence_container_ul, 16);
533
        break;
534
    case 0x3006:
535
        descriptor->linked_track_id = get_be32(pb);
536
        break;
537
    case 0x3201: /* PictureEssenceCoding */
538
        get_buffer(pb, descriptor->essence_codec_ul, 16);
539
        break;
540
    case 0x3203:
541
        descriptor->width = get_be32(pb);
542
        break;
543
    case 0x3202:
544
        descriptor->height = get_be32(pb);
545
        break;
546
    case 0x320E:
547
        descriptor->aspect_ratio.num = get_be32(pb);
548
        descriptor->aspect_ratio.den = get_be32(pb);
549
        break;
550
    case 0x3D03:
551
        descriptor->sample_rate.num = get_be32(pb);
552
        descriptor->sample_rate.den = get_be32(pb);
553
        break;
554
    case 0x3D06: /* SoundEssenceCompression */
555
        get_buffer(pb, descriptor->essence_codec_ul, 16);
556
        break;
557
    case 0x3D07:
558
        descriptor->channels = get_be32(pb);
559
        break;
560
    case 0x3D01:
561
        descriptor->bits_per_sample = get_be32(pb);
562
        break;
563
    case 0x3401:
564
        mxf_read_metadata_pixel_layout(pb, descriptor);
565
        break;
566
    case 0x8201: /* Private tag used by SONY C0023S01.mxf */
567
        descriptor->extradata = av_malloc(size);
568
        descriptor->extradata_size = size;
569
        get_buffer(pb, descriptor->extradata, size);
570
        break;
571
    }
572
    return 0;
573
}
574

    
575
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
576
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
577
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
578
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
579
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
580
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
581
};
582

    
583
static const MXFCodecUL mxf_codec_uls[] = {
584
    /* PictureEssenceCoding */
585
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
586
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
587
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
588
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
589
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
590
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
591
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
592
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
593
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
594
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
595
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
596
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
597
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
598
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
599
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
600
    /* SoundEssenceCompression */
601
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
602
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
603
    { { 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 */
604
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
605
    { { 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 */
606
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
607
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
608
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
609
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
610
};
611

    
612
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
613
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
614
    { { 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 */
615
    { { 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 */
616
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
617
};
618

    
619
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
620
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
621
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
622
    { { 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 */
623
    { { 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 */
624
    { { 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 */
625
    { { 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 */
626
    { { 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 */
627
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
628
};
629

    
630
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
631
{
632
    while (uls->id != CODEC_ID_NONE) {
633
        if(!memcmp(uls->uid, *uid, 16))
634
            break;
635
        uls++;
636
    }
637
    return uls;
638
}
639

    
640
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
641
{
642
    while (uls->type != CODEC_TYPE_DATA) {
643
        if(!memcmp(uls->uid, *uid, 16))
644
            break;
645
        uls++;
646
    }
647
    return uls->type;
648
}
649

    
650
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
651
{
652
    int i;
653

    
654
    if (!strong_ref)
655
        return NULL;
656
    for (i = 0; i < mxf->metadata_sets_count; i++) {
657
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
658
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
659
            return mxf->metadata_sets[i];
660
        }
661
    }
662
    return NULL;
663
}
664

    
665
static int mxf_parse_structural_metadata(MXFContext *mxf)
666
{
667
    MXFPackage *material_package = NULL;
668
    MXFPackage *temp_package = NULL;
669
    int i, j, k;
670

    
671
    dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
672
    /* TODO: handle multiple material packages (OP3x) */
673
    for (i = 0; i < mxf->packages_count; i++) {
674
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
675
        if (material_package) break;
676
    }
677
    if (!material_package) {
678
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
679
        return -1;
680
    }
681

    
682
    for (i = 0; i < material_package->tracks_count; i++) {
683
        MXFPackage *source_package = NULL;
684
        MXFTrack *material_track = NULL;
685
        MXFTrack *source_track = NULL;
686
        MXFTrack *temp_track = NULL;
687
        MXFDescriptor *descriptor = NULL;
688
        MXFStructuralComponent *component = NULL;
689
        UID *essence_container_ul = NULL;
690
        const MXFCodecUL *codec_ul = NULL;
691
        const MXFCodecUL *container_ul = NULL;
692
        AVStream *st;
693

    
694
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
695
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
696
            continue;
697
        }
698

    
699
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
700
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
701
            return -1;
702
        }
703

    
704
        /* TODO: handle multiple source clips */
705
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
706
            /* TODO: handle timecode component */
707
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
708
            if (!component)
709
                continue;
710

    
711
            for (k = 0; k < mxf->packages_count; k++) {
712
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
713
                if (!temp_package)
714
                    continue;
715
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
716
                    source_package = temp_package;
717
                    break;
718
                }
719
            }
720
            if (!source_package) {
721
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
722
                break;
723
            }
724
            for (k = 0; k < source_package->tracks_count; k++) {
725
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
726
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
727
                    return -1;
728
                }
729
                if (temp_track->track_id == component->source_track_id) {
730
                    source_track = temp_track;
731
                    break;
732
                }
733
            }
734
            if (!source_track) {
735
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
736
                break;
737
            }
738
        }
739
        if (!source_track)
740
            continue;
741

    
742
        st = av_new_stream(mxf->fc, source_track->track_id);
743
        st->priv_data = source_track;
744
        st->duration = component->duration;
745
        if (st->duration == -1)
746
            st->duration = AV_NOPTS_VALUE;
747
        st->start_time = component->start_position;
748
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
749

    
750
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
751
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
752
            return -1;
753
        }
754

    
755
#ifdef DEBUG
756
        PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
757
#endif
758
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
759

    
760
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
761
        if (source_package->descriptor) {
762
            if (source_package->descriptor->type == MultipleDescriptor) {
763
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
764
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
765

    
766
                    if (!sub_descriptor) {
767
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
768
                        continue;
769
                    }
770
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
771
                        descriptor = sub_descriptor;
772
                        break;
773
                    }
774
                }
775
            } else if (source_package->descriptor->type == Descriptor)
776
                descriptor = source_package->descriptor;
777
        }
778
        if (!descriptor) {
779
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
780
            continue;
781
        }
782
#ifdef DEBUG
783
        PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
784
        PRINT_KEY("essence container ul", descriptor->essence_container_ul);
785
#endif
786
        essence_container_ul = &descriptor->essence_container_ul;
787
        /* HACK: replacing the original key with mxf_encrypted_essence_container
788
         * is not allowed according to s429-6, try to find correct information anyway */
789
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
790
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
791
            for (k = 0; k < mxf->metadata_sets_count; k++) {
792
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
793
                if (metadata->type == CryptoContext) {
794
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
795
                    break;
796
                }
797
            }
798
        }
799
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
800
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
801
        st->codec->codec_id = codec_ul->id;
802
        if (descriptor->extradata) {
803
            st->codec->extradata = descriptor->extradata;
804
            st->codec->extradata_size = descriptor->extradata_size;
805
        }
806
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
807
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
808
            if (st->codec->codec_id == CODEC_ID_NONE)
809
                st->codec->codec_id = container_ul->id;
810
            st->codec->width = descriptor->width;
811
            st->codec->height = descriptor->height;
812
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
813
            st->need_parsing = 2; /* only parse headers */
814
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
815
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
816
            if (st->codec->codec_id == CODEC_ID_NONE)
817
                st->codec->codec_id = container_ul->id;
818
            st->codec->channels = descriptor->channels;
819
            st->codec->bits_per_sample = descriptor->bits_per_sample;
820
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
821
            /* TODO: implement CODEC_ID_RAWAUDIO */
822
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
823
                if (descriptor->bits_per_sample == 24)
824
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
825
                else if (descriptor->bits_per_sample == 32)
826
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
827
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
828
                if (descriptor->bits_per_sample == 24)
829
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
830
                else if (descriptor->bits_per_sample == 32)
831
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
832
                if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
833
                    st->codec->channels = 8; /* force channels to 8 */
834
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
835
                st->need_parsing = 1;
836
            }
837
        }
838
        if (container_ul && container_ul->wrapping == Clip) {
839
            dprintf("stream %d: clip wrapped essence\n", st->index);
840
            st->need_parsing = 1;
841
        }
842
    }
843
    return 0;
844
}
845

    
846
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
847
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
848
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
849
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
850
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
851
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
852
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
853
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
854
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
855
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
856
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
857
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
858
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
859
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Static Track */
860
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Generic Track */
861
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_metadata_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
862
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
863
};
864

    
865
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
866
{
867
    int i, b;
868
    for (i = 0; i < size && !url_feof(pb); i++) {
869
        b = get_byte(pb);
870
        if (b == key[0])
871
            i = 0;
872
        else if (b != key[i])
873
            i = -1;
874
    }
875
    return i == size;
876
}
877

    
878
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
879
{
880
    ByteIOContext *pb = &mxf->fc->pb;
881
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
882
    uint64_t klv_end= url_ftell(pb) + klv->length;
883

    
884
    while (url_ftell(pb) + 4 < klv_end) {
885
        int tag = get_be16(pb);
886
        int size = get_be16(pb); /* KLV specified by 0x53 */
887
        uint64_t next= url_ftell(pb) + size;
888

    
889
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
890
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
891
            continue;
892
        }
893
        if(ctx_size && tag == 0x3C0A)
894
            get_buffer(pb, ctx->uid, 16);
895
        else
896
            read_child(ctx, pb, tag, size);
897

    
898
        url_fseek(pb, next, SEEK_SET);
899
    }
900
    if (ctx_size) ctx->type = type;
901
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
902
}
903

    
904
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
905
{
906
    MXFContext *mxf = s->priv_data;
907
    KLVPacket klv;
908

    
909
    mxf->sync_key = mxf_essence_element_key;
910
    if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
911
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
912
        return -1;
913
    }
914
    url_fseek(&s->pb, -14, SEEK_CUR);
915
    mxf->fc = s;
916
    while (!url_feof(&s->pb)) {
917
        const MXFMetadataReadTableEntry *metadata;
918

    
919
        if (klv_read_packet(&klv, &s->pb) < 0) {
920
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
921
            return -1;
922
        }
923
#ifdef DEBUG
924
        PRINT_KEY("read header", klv.key);
925
#endif
926
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
927
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
928
            /* FIXME avoid seek */
929
            url_fseek(&s->pb, klv.offset, SEEK_SET);
930
            break;
931
        }
932

    
933
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
934
            if (IS_KLV_KEY(klv.key, metadata->key)) {
935
                if (mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
936
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
937
                    return -1;
938
                }
939
                break;
940
            }
941
        }
942
        if (!metadata->read)
943
            url_fskip(&s->pb, klv.length);
944
    }
945
    return mxf_parse_structural_metadata(mxf);
946
}
947

    
948
static int mxf_read_close(AVFormatContext *s)
949
{
950
    MXFContext *mxf = s->priv_data;
951
    int i;
952

    
953
    av_freep(&mxf->packages_refs);
954
    for (i = 0; i < mxf->metadata_sets_count; i++) {
955
        switch (mxf->metadata_sets[i]->type) {
956
        case MultipleDescriptor:
957
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
958
            break;
959
        case Sequence:
960
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
961
            break;
962
        case SourcePackage:
963
        case MaterialPackage:
964
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
965
            break;
966
        default:
967
            break;
968
        }
969
        av_freep(&mxf->metadata_sets[i]);
970
    }
971
    av_freep(&mxf->metadata_sets);
972
    av_freep(&mxf->aesc);
973
    return 0;
974
}
975

    
976
static int mxf_probe(AVProbeData *p) {
977
    uint8_t *bufp = p->buf;
978
    uint8_t *end = p->buf + p->buf_size;
979

    
980
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
981
        return 0;
982

    
983
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
984
    end -= sizeof(mxf_header_partition_pack_key);
985
    for (; bufp < end; bufp++) {
986
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
987
            return AVPROBE_SCORE_MAX;
988
    }
989
    return 0;
990
}
991

    
992
/* rudimentary binary seek */
993
/* XXX: use MXF Index */
994
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
995
{
996
    MXFContext *mxf = s->priv_data;
997
    AVStream *st = s->streams[stream_index];
998
    int64_t seconds;
999

    
1000
    if (!s->bit_rate)
1001
        return -1;
1002
    if (sample_time < 0)
1003
        sample_time = 0;
1004
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1005
    url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1006
    if (!mxf_read_sync(&s->pb, mxf->sync_key, 12))
1007
        return -1;
1008

    
1009
    /* found KLV key */
1010
    url_fseek(&s->pb, -12, SEEK_CUR);
1011
    av_update_cur_dts(s, st, sample_time);
1012
    return 0;
1013
}
1014

    
1015
AVInputFormat mxf_demuxer = {
1016
    "mxf",
1017
    "MXF format",
1018
    sizeof(MXFContext),
1019
    mxf_probe,
1020
    mxf_read_header,
1021
    mxf_read_packet,
1022
    mxf_read_close,
1023
    mxf_read_seek,
1024
};