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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
 *
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 * 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
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 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25
 * 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
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
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 *
32
 * 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
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,
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    SourcePackage,
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    SourceClip,
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    TimecodeComponent,
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    Sequence,
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    MultipleDescriptor,
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    Descriptor,
62
    Track,
63
    CryptoContext,
64
};
65

    
66
typedef struct {
67
    UID uid;
68
    enum MXFMetadataSetType type;
69
    UID context_uid;
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    UID source_container_ul;
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} MXFCryptoContext;
72

    
73
typedef struct {
74
    UID uid;
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    enum MXFMetadataSetType type;
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    UID source_package_uid;
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    UID data_definition_ul;
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    int64_t duration;
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    int64_t start_position;
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    int source_track_id;
81
} MXFStructuralComponent;
82

    
83
typedef struct {
84
    UID uid;
85
    enum MXFMetadataSetType type;
86
    UID data_definition_ul;
87
    UID *structural_components_refs;
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    int structural_components_count;
89
    int64_t duration;
90
} MXFSequence;
91

    
92
typedef struct {
93
    UID uid;
94
    enum MXFMetadataSetType type;
95
    MXFSequence *sequence; /* mandatory, and only one */
96
    UID sequence_ref;
97
    int track_id;
98
    uint8_t track_number[4];
99
    AVRational edit_rate;
100
} MXFTrack;
101

    
102
typedef struct {
103
    UID uid;
104
    enum MXFMetadataSetType type;
105
    UID essence_container_ul;
106
    UID essence_codec_ul;
107
    AVRational sample_rate;
108
    AVRational aspect_ratio;
109
    int width;
110
    int height;
111
    int channels;
112
    int bits_per_sample;
113
    UID *sub_descriptors_refs;
114
    int sub_descriptors_count;
115
    int linked_track_id;
116
    uint8_t *extradata;
117
    int extradata_size;
118
} MXFDescriptor;
119

    
120
typedef struct {
121
    UID uid;
122
    enum MXFMetadataSetType type;
123
    UID package_uid;
124
    UID *tracks_refs;
125
    int tracks_count;
126
    MXFDescriptor *descriptor; /* only one */
127
    UID descriptor_ref;
128
} MXFPackage;
129

    
130
typedef struct {
131
    UID uid;
132
    enum MXFMetadataSetType type;
133
} MXFMetadataSet;
134

    
135
typedef struct {
136
    UID *packages_refs;
137
    int packages_count;
138
    MXFMetadataSet **metadata_sets;
139
    int metadata_sets_count;
140
    AVFormatContext *fc;
141
    struct AVAES *aesc;
142
} MXFContext;
143

    
144
typedef struct {
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 {
156
    UID uid;
157
    enum CodecID id;
158
    enum MXFWrappingScheme wrapping;
159
} MXFCodecUL;
160

    
161
typedef struct {
162
    UID uid;
163
    enum CodecType type;
164
} MXFDataDefinitionUL;
165

    
166
typedef struct {
167
    const UID key;
168
    int (*read)();
169
    int ctx_size;
170
    enum MXFMetadataSetType type;
171
} MXFMetadataReadTableEntry;
172

    
173
/* partial keys to match */
174
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
175
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
176
static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
177
/* complete keys to match */
178
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
179
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
180

    
181
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
182

    
183
#define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
184
                             (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])
185

    
186
static int64_t klv_decode_ber_length(ByteIOContext *pb)
187
{
188
    uint64_t size = get_byte(pb);
189
    if (size & 0x80) { /* long form */
190
        int bytes_num = size & 0x7f;
191
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
192
        if (bytes_num > 8)
193
            return -1;
194
        size = 0;
195
        while (bytes_num--)
196
            size = size << 8 | get_byte(pb);
197
    }
198
    return size;
199
}
200

    
201
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
202
{
203
    int i, b;
204
    for (i = 0; i < size && !url_feof(pb); i++) {
205
        b = get_byte(pb);
206
        if (b == key[0])
207
            i = 0;
208
        else if (b != key[i])
209
            i = -1;
210
    }
211
    return i == size;
212
}
213

    
214
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
215
{
216
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
217
        return -1;
218
    klv->offset = url_ftell(pb) - 4;
219
    memcpy(klv->key, mxf_klv_key, 4);
220
    get_buffer(pb, klv->key + 4, 12);
221
    klv->length = klv_decode_ber_length(pb);
222
    return klv->length == -1 ? -1 : 0;
223
}
224

    
225
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
226
{
227
    int i;
228

    
229
    for (i = 0; i < s->nb_streams; i++) {
230
        MXFTrack *track = s->streams[i]->priv_data;
231
        /* SMPTE 379M 7.3 */
232
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
233
            return i;
234
    }
235
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
236
    return s->nb_streams == 1 ? 0 : -1;
237
}
238

    
239
/* XXX: use AVBitStreamFilter */
240
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
241
{
242
    uint8_t buffer[61444];
243
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
244

    
245
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
246
        return -1;
247
    get_buffer(pb, buffer, length);
248
    av_new_packet(pkt, length);
249
    data_ptr = pkt->data;
250
    end_ptr = buffer + length;
251
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
252
    for (; buf_ptr < end_ptr; buf_ptr += 4) {
253
        if (st->codec->bits_per_sample == 24) {
254
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
255
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
256
            data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
257
            data_ptr += 3;
258
        } else {
259
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
260
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
261
            data_ptr += 2;
262
        }
263
    }
264
    pkt->size = data_ptr - pkt->data;
265
    return 0;
266
}
267

    
268
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
269
{
270
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
271
    MXFContext *mxf = s->priv_data;
272
    ByteIOContext *pb = &s->pb;
273
    offset_t end = url_ftell(pb) + klv->length;
274
    uint64_t size;
275
    uint64_t orig_size;
276
    uint64_t plaintext_size;
277
    uint8_t ivec[16];
278
    uint8_t tmpbuf[16];
279
    int index;
280

    
281
    if (!mxf->aesc && s->key && s->keylen == 16) {
282
        mxf->aesc = av_malloc(av_aes_size);
283
        av_aes_init(mxf->aesc, s->key, 128, 1);
284
    }
285
    // crypto context
286
    url_fskip(pb, klv_decode_ber_length(pb));
287
    // plaintext offset
288
    klv_decode_ber_length(pb);
289
    plaintext_size = get_be64(pb);
290
    // source klv key
291
    klv_decode_ber_length(pb);
292
    get_buffer(pb, klv->key, 16);
293
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
294
        return -1;
295
    index = mxf_get_stream_index(s, klv);
296
    if (index < 0)
297
        return -1;
298
    // source size
299
    klv_decode_ber_length(pb);
300
    orig_size = get_be64(pb);
301
    if (orig_size < plaintext_size)
302
        return -1;
303
    // enc. code
304
    size = klv_decode_ber_length(pb);
305
    if (size < 32 || size - 32 < orig_size)
306
        return -1;
307
    get_buffer(pb, ivec, 16);
308
    get_buffer(pb, tmpbuf, 16);
309
    if (mxf->aesc)
310
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
311
    if (memcmp(tmpbuf, checkv, 16))
312
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
313
    size -= 32;
314
    av_get_packet(pb, pkt, size);
315
    size -= plaintext_size;
316
    if (mxf->aesc)
317
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
318
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
319
    pkt->size = orig_size;
320
    pkt->stream_index = index;
321
    url_fskip(pb, end - url_ftell(pb));
322
    return 0;
323
}
324

    
325
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
326
{
327
    KLVPacket klv;
328

    
329
    while (!url_feof(&s->pb)) {
330
        if (klv_read_packet(&klv, &s->pb) < 0)
331
            return -1;
332
#ifdef DEBUG
333
        PRINT_KEY(s, "read packet", klv.key);
334
#endif
335
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
336
            int res = mxf_decrypt_triplet(s, pkt, &klv);
337
            if (res < 0) {
338
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
339
                return -1;
340
            }
341
            return 0;
342
        }
343
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
344
            int index = mxf_get_stream_index(s, &klv);
345
            if (index < 0) {
346
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
347
                url_fskip(&s->pb, klv.length);
348
                return -1;
349
            }
350
            /* check for 8 channels AES3 element */
351
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
352
                if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
353
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
354
                    return -1;
355
                }
356
            } else
357
                av_get_packet(&s->pb, pkt, klv.length);
358
            pkt->stream_index = index;
359
            pkt->pos = klv.offset;
360
            return 0;
361
        } else
362
            url_fskip(&s->pb, klv.length);
363
    }
364
    return AVERROR(EIO);
365
}
366

    
367
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
368
{
369
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
370
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
371
    mxf->metadata_sets_count++;
372
    return 0;
373
}
374

    
375
static int mxf_read_metadata_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag)
376
{
377
    switch(tag) {
378
    case 0xFFFE:
379
        get_buffer(pb, cryptocontext->context_uid, 16);
380
        break;
381
    case 0xFFFD:
382
        get_buffer(pb, cryptocontext->source_container_ul, 16);
383
        break;
384
    }
385
    return 0;
386
}
387

    
388
static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
389
{
390
    switch (tag) {
391
    case 0x1901:
392
        mxf->packages_count = get_be32(pb);
393
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
394
            return -1;
395
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
396
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
397
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
398
        break;
399
    }
400
    return 0;
401
}
402

    
403
static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
404
{
405
    switch(tag) {
406
    case 0x0202:
407
        source_clip->duration = get_be64(pb);
408
        break;
409
    case 0x1201:
410
        source_clip->start_position = get_be64(pb);
411
        break;
412
    case 0x1101:
413
        /* UMID, only get last 16 bytes */
414
        url_fskip(pb, 16);
415
        get_buffer(pb, source_clip->source_package_uid, 16);
416
        break;
417
    case 0x1102:
418
        source_clip->source_track_id = get_be32(pb);
419
        break;
420
    }
421
    return 0;
422
}
423

    
424
static int mxf_read_metadata_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
425
{
426
    switch(tag) {
427
    case 0x4403:
428
        package->tracks_count = get_be32(pb);
429
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
430
            return -1;
431
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
432
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
433
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
434
        break;
435
    }
436
    return 0;
437
}
438

    
439
static int mxf_read_metadata_track(MXFTrack *track, ByteIOContext *pb, int tag)
440
{
441
    switch(tag) {
442
    case 0x4801:
443
        track->track_id = get_be32(pb);
444
        break;
445
    case 0x4804:
446
        get_buffer(pb, track->track_number, 4);
447
        break;
448
    case 0x4B01:
449
        track->edit_rate.den = get_be32(pb);
450
        track->edit_rate.num = get_be32(pb);
451
        break;
452
    case 0x4803:
453
        get_buffer(pb, track->sequence_ref, 16);
454
        break;
455
    }
456
    return 0;
457
}
458

    
459
static int mxf_read_metadata_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
460
{
461
    switch(tag) {
462
    case 0x0202:
463
        sequence->duration = get_be64(pb);
464
        break;
465
    case 0x0201:
466
        get_buffer(pb, sequence->data_definition_ul, 16);
467
        break;
468
    case 0x1001:
469
        sequence->structural_components_count = get_be32(pb);
470
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
471
            return -1;
472
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
473
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
474
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
475
        break;
476
    }
477
    return 0;
478
}
479

    
480
static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
481
{
482
    switch(tag) {
483
    case 0x4403:
484
        package->tracks_count = get_be32(pb);
485
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
486
            return -1;
487
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
488
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
489
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
490
        break;
491
    case 0x4401:
492
        /* UMID, only get last 16 bytes */
493
        url_fskip(pb, 16);
494
        get_buffer(pb, package->package_uid, 16);
495
        break;
496
    case 0x4701:
497
        get_buffer(pb, package->descriptor_ref, 16);
498
        break;
499
    }
500
    return 0;
501
}
502

    
503
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
504
{
505
    int code;
506

    
507
    do {
508
        code = get_byte(pb);
509
        dprintf(NULL, "pixel layout: code 0x%x\n", code);
510
        switch (code) {
511
        case 0x52: /* R */
512
            descriptor->bits_per_sample += get_byte(pb);
513
            break;
514
        case 0x47: /* G */
515
            descriptor->bits_per_sample += get_byte(pb);
516
            break;
517
        case 0x42: /* B */
518
            descriptor->bits_per_sample += get_byte(pb);
519
            break;
520
        default:
521
            get_byte(pb);
522
        }
523
    } while (code != 0); /* SMPTE 377M E.2.46 */
524
}
525

    
526
static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
527
{
528
    switch(tag) {
529
    case 0x3F01:
530
        descriptor->sub_descriptors_count = get_be32(pb);
531
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
532
            return -1;
533
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
534
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
535
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
536
        break;
537
    case 0x3004:
538
        get_buffer(pb, descriptor->essence_container_ul, 16);
539
        break;
540
    case 0x3006:
541
        descriptor->linked_track_id = get_be32(pb);
542
        break;
543
    case 0x3201: /* PictureEssenceCoding */
544
        get_buffer(pb, descriptor->essence_codec_ul, 16);
545
        break;
546
    case 0x3203:
547
        descriptor->width = get_be32(pb);
548
        break;
549
    case 0x3202:
550
        descriptor->height = get_be32(pb);
551
        break;
552
    case 0x320E:
553
        descriptor->aspect_ratio.num = get_be32(pb);
554
        descriptor->aspect_ratio.den = get_be32(pb);
555
        break;
556
    case 0x3D03:
557
        descriptor->sample_rate.num = get_be32(pb);
558
        descriptor->sample_rate.den = get_be32(pb);
559
        break;
560
    case 0x3D06: /* SoundEssenceCompression */
561
        get_buffer(pb, descriptor->essence_codec_ul, 16);
562
        break;
563
    case 0x3D07:
564
        descriptor->channels = get_be32(pb);
565
        break;
566
    case 0x3D01:
567
        descriptor->bits_per_sample = get_be32(pb);
568
        break;
569
    case 0x3401:
570
        mxf_read_metadata_pixel_layout(pb, descriptor);
571
        break;
572
    case 0x8201: /* Private tag used by SONY C0023S01.mxf */
573
        descriptor->extradata = av_malloc(size);
574
        descriptor->extradata_size = size;
575
        get_buffer(pb, descriptor->extradata, size);
576
        break;
577
    }
578
    return 0;
579
}
580

    
581
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
582
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
583
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
584
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
585
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
586
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
587
};
588

    
589
static const MXFCodecUL mxf_codec_uls[] = {
590
    /* PictureEssenceCoding */
591
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
592

    
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,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 40Mbps PAL */
595
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
596

    
597
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
598
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
599

    
600
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
601

    
602
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
603
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
604

    
605
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
606
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
607

    
608
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
609
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
610
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
611

    
612
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
613

    
614
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
615
    /* SoundEssenceCompression */
616
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
617
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
618
    { { 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 */
619
    { { 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 */
620
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
621
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
622
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
623
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
624
};
625

    
626
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
627
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
628
    { { 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 */
629
    { { 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 */
630
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
631
};
632

    
633
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
634
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
635
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
636
    { { 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 */
637
    { { 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 */
638
    { { 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 */
639
    { { 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 */
640
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 40Mbps PAL Extended Template */
641
    { { 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 */
642
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
643
};
644

    
645
/*
646
 * Match an uid independently of the version byte and up to len common bytes
647
 * Returns: boolean
648
 */
649
static int mxf_match_uid(const UID key, const UID uid, int len)
650
{
651
    int i;
652
    for (i = 0; i < len; i++) {
653
        if (i != 7 && key[i] != uid[i])
654
            return 0;
655
    }
656
    return 1;
657
}
658

    
659
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
660
{
661
    while (uls->id != CODEC_ID_NONE) {
662
        if(mxf_match_uid(uls->uid, *uid, 16))
663
            break;
664
        uls++;
665
    }
666
    return uls;
667
}
668

    
669
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
670
{
671
    while (uls->type != CODEC_TYPE_DATA) {
672
        if(mxf_match_uid(uls->uid, *uid, 16))
673
            break;
674
        uls++;
675
    }
676
    return uls->type;
677
}
678

    
679
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
680
{
681
    int i;
682

    
683
    if (!strong_ref)
684
        return NULL;
685
    for (i = 0; i < mxf->metadata_sets_count; i++) {
686
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
687
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
688
            return mxf->metadata_sets[i];
689
        }
690
    }
691
    return NULL;
692
}
693

    
694
static int mxf_parse_structural_metadata(MXFContext *mxf)
695
{
696
    MXFPackage *material_package = NULL;
697
    MXFPackage *temp_package = NULL;
698
    int i, j, k;
699

    
700
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
701
    /* TODO: handle multiple material packages (OP3x) */
702
    for (i = 0; i < mxf->packages_count; i++) {
703
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
704
        if (material_package) break;
705
    }
706
    if (!material_package) {
707
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
708
        return -1;
709
    }
710

    
711
    for (i = 0; i < material_package->tracks_count; i++) {
712
        MXFPackage *source_package = NULL;
713
        MXFTrack *material_track = NULL;
714
        MXFTrack *source_track = NULL;
715
        MXFTrack *temp_track = NULL;
716
        MXFDescriptor *descriptor = NULL;
717
        MXFStructuralComponent *component = NULL;
718
        UID *essence_container_ul = NULL;
719
        const MXFCodecUL *codec_ul = NULL;
720
        const MXFCodecUL *container_ul = NULL;
721
        AVStream *st;
722

    
723
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
724
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
725
            continue;
726
        }
727

    
728
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
729
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
730
            return -1;
731
        }
732

    
733
        /* TODO: handle multiple source clips */
734
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
735
            /* TODO: handle timecode component */
736
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
737
            if (!component)
738
                continue;
739

    
740
            for (k = 0; k < mxf->packages_count; k++) {
741
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
742
                if (!temp_package)
743
                    continue;
744
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
745
                    source_package = temp_package;
746
                    break;
747
                }
748
            }
749
            if (!source_package) {
750
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
751
                break;
752
            }
753
            for (k = 0; k < source_package->tracks_count; k++) {
754
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
755
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
756
                    return -1;
757
                }
758
                if (temp_track->track_id == component->source_track_id) {
759
                    source_track = temp_track;
760
                    break;
761
                }
762
            }
763
            if (!source_track) {
764
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
765
                break;
766
            }
767
        }
768
        if (!source_track)
769
            continue;
770

    
771
        st = av_new_stream(mxf->fc, source_track->track_id);
772
        st->priv_data = source_track;
773
        st->duration = component->duration;
774
        if (st->duration == -1)
775
            st->duration = AV_NOPTS_VALUE;
776
        st->start_time = component->start_position;
777
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
778

    
779
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
780
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
781
            return -1;
782
        }
783

    
784
#ifdef DEBUG
785
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
786
#endif
787
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
788

    
789
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
790
        if (source_package->descriptor) {
791
            if (source_package->descriptor->type == MultipleDescriptor) {
792
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
793
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
794

    
795
                    if (!sub_descriptor) {
796
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
797
                        continue;
798
                    }
799
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
800
                        descriptor = sub_descriptor;
801
                        break;
802
                    }
803
                }
804
            } else if (source_package->descriptor->type == Descriptor)
805
                descriptor = source_package->descriptor;
806
        }
807
        if (!descriptor) {
808
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
809
            continue;
810
        }
811
#ifdef DEBUG
812
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
813
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
814
#endif
815
        essence_container_ul = &descriptor->essence_container_ul;
816
        /* HACK: replacing the original key with mxf_encrypted_essence_container
817
         * is not allowed according to s429-6, try to find correct information anyway */
818
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
819
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
820
            for (k = 0; k < mxf->metadata_sets_count; k++) {
821
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
822
                if (metadata->type == CryptoContext) {
823
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
824
                    break;
825
                }
826
            }
827
        }
828
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
829
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
830
        st->codec->codec_id = codec_ul->id;
831
        if (descriptor->extradata) {
832
            st->codec->extradata = descriptor->extradata;
833
            st->codec->extradata_size = descriptor->extradata_size;
834
        }
835
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
836
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
837
            if (st->codec->codec_id == CODEC_ID_NONE)
838
                st->codec->codec_id = container_ul->id;
839
            st->codec->width = descriptor->width;
840
            st->codec->height = descriptor->height;
841
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
842
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
843
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
844
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
845
            if (st->codec->codec_id == CODEC_ID_NONE)
846
                st->codec->codec_id = container_ul->id;
847
            st->codec->channels = descriptor->channels;
848
            st->codec->bits_per_sample = descriptor->bits_per_sample;
849
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
850
            /* TODO: implement CODEC_ID_RAWAUDIO */
851
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
852
                if (descriptor->bits_per_sample == 24)
853
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
854
                else if (descriptor->bits_per_sample == 32)
855
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
856
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
857
                if (descriptor->bits_per_sample == 24)
858
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
859
                else if (descriptor->bits_per_sample == 32)
860
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
861
                if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
862
                    st->codec->channels = 8; /* force channels to 8 */
863
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
864
                st->need_parsing = AVSTREAM_PARSE_FULL;
865
            }
866
        }
867
        if (container_ul && container_ul->wrapping == Clip) {
868
            dprintf(mxf->fc, "stream %d: clip wrapped essence\n", st->index);
869
            st->need_parsing = AVSTREAM_PARSE_FULL;
870
        }
871
    }
872
    return 0;
873
}
874

    
875
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
876
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
877
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
878
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
879
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
880
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
881
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
882
    { { 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 */
883
    { { 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 */
884
    { { 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 */
885
    { { 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 */
886
    { { 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 */
887
    { { 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 */
888
    { { 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 */
889
    { { 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 */
890
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_metadata_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
891
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
892
};
893

    
894
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
895
{
896
    ByteIOContext *pb = &mxf->fc->pb;
897
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
898
    uint64_t klv_end= url_ftell(pb) + klv->length;
899

    
900
    while (url_ftell(pb) + 4 < klv_end) {
901
        int tag = get_be16(pb);
902
        int size = get_be16(pb); /* KLV specified by 0x53 */
903
        uint64_t next= url_ftell(pb) + size;
904

    
905
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
906
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
907
            continue;
908
        }
909
        if(ctx_size && tag == 0x3C0A)
910
            get_buffer(pb, ctx->uid, 16);
911
        else
912
            read_child(ctx, pb, tag, size);
913

    
914
        url_fseek(pb, next, SEEK_SET);
915
    }
916
    if (ctx_size) ctx->type = type;
917
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
918
}
919

    
920
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
921
{
922
    MXFContext *mxf = s->priv_data;
923
    KLVPacket klv;
924

    
925
    if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
926
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
927
        return -1;
928
    }
929
    url_fseek(&s->pb, -14, SEEK_CUR);
930
    mxf->fc = s;
931
    while (!url_feof(&s->pb)) {
932
        const MXFMetadataReadTableEntry *metadata;
933

    
934
        if (klv_read_packet(&klv, &s->pb) < 0)
935
            return -1;
936
#ifdef DEBUG
937
        PRINT_KEY(s, "read header", klv.key);
938
#endif
939
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
940
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
941
            /* FIXME avoid seek */
942
            url_fseek(&s->pb, klv.offset, SEEK_SET);
943
            break;
944
        }
945

    
946
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
947
            if (IS_KLV_KEY(klv.key, metadata->key)) {
948
                if (mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
949
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
950
                    return -1;
951
                }
952
                break;
953
            }
954
        }
955
        if (!metadata->read)
956
            url_fskip(&s->pb, klv.length);
957
    }
958
    return mxf_parse_structural_metadata(mxf);
959
}
960

    
961
static int mxf_read_close(AVFormatContext *s)
962
{
963
    MXFContext *mxf = s->priv_data;
964
    int i;
965

    
966
    av_freep(&mxf->packages_refs);
967
    for (i = 0; i < mxf->metadata_sets_count; i++) {
968
        switch (mxf->metadata_sets[i]->type) {
969
        case MultipleDescriptor:
970
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
971
            break;
972
        case Sequence:
973
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
974
            break;
975
        case SourcePackage:
976
        case MaterialPackage:
977
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
978
            break;
979
        default:
980
            break;
981
        }
982
        av_freep(&mxf->metadata_sets[i]);
983
    }
984
    av_freep(&mxf->metadata_sets);
985
    av_freep(&mxf->aesc);
986
    return 0;
987
}
988

    
989
static int mxf_probe(AVProbeData *p) {
990
    uint8_t *bufp = p->buf;
991
    uint8_t *end = p->buf + p->buf_size;
992

    
993
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
994
        return 0;
995

    
996
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
997
    end -= sizeof(mxf_header_partition_pack_key);
998
    for (; bufp < end; bufp++) {
999
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1000
            return AVPROBE_SCORE_MAX;
1001
    }
1002
    return 0;
1003
}
1004

    
1005
/* rudimentary byte seek */
1006
/* XXX: use MXF Index */
1007
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1008
{
1009
    AVStream *st = s->streams[stream_index];
1010
    int64_t seconds;
1011

    
1012
    if (!s->bit_rate)
1013
        return -1;
1014
    if (sample_time < 0)
1015
        sample_time = 0;
1016
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1017
    url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1018
    av_update_cur_dts(s, st, sample_time);
1019
    return 0;
1020
}
1021

    
1022
AVInputFormat mxf_demuxer = {
1023
    "mxf",
1024
    "MXF format",
1025
    sizeof(MXFContext),
1026
    mxf_probe,
1027
    mxf_read_header,
1028
    mxf_read_packet,
1029
    mxf_read_close,
1030
    mxf_read_seek,
1031
};