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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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with 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
28
 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29
 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
31
 *
32
 * Principle
33
 * Search for Track numbers which will identify essence element KLV packets.
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 * Search for SourcePackage which define tracks which contains Track numbers.
35
 * Material Package contains tracks with reference to SourcePackage tracks.
36
 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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 * Assign Descriptors to correct Tracks.
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 *
39
 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40
 * Metadata parsing resolves Strong References to objects.
41
 *
42
 * Simple demuxer, only OP1A supported and some files might not work at all.
43
 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
44
 */
45

    
46
//#define DEBUG
47

    
48
#include "libavutil/aes.h"
49
#include "libavcodec/bytestream.h"
50
#include "avformat.h"
51
#include "mxf.h"
52

    
53
typedef struct {
54
    UID uid;
55
    enum MXFMetadataSetType type;
56
    UID source_container_ul;
57
} MXFCryptoContext;
58

    
59
typedef struct {
60
    UID uid;
61
    enum MXFMetadataSetType type;
62
    UID source_package_uid;
63
    UID data_definition_ul;
64
    int64_t duration;
65
    int64_t start_position;
66
    int source_track_id;
67
} MXFStructuralComponent;
68

    
69
typedef struct {
70
    UID uid;
71
    enum MXFMetadataSetType type;
72
    UID data_definition_ul;
73
    UID *structural_components_refs;
74
    int structural_components_count;
75
    int64_t duration;
76
} MXFSequence;
77

    
78
typedef struct {
79
    UID uid;
80
    enum MXFMetadataSetType type;
81
    MXFSequence *sequence; /* mandatory, and only one */
82
    UID sequence_ref;
83
    int track_id;
84
    uint8_t track_number[4];
85
    AVRational edit_rate;
86
} MXFTrack;
87

    
88
typedef struct {
89
    UID uid;
90
    enum MXFMetadataSetType type;
91
    UID essence_container_ul;
92
    UID essence_codec_ul;
93
    AVRational sample_rate;
94
    AVRational aspect_ratio;
95
    int width;
96
    int height;
97
    int channels;
98
    int bits_per_sample;
99
    UID *sub_descriptors_refs;
100
    int sub_descriptors_count;
101
    int linked_track_id;
102
    uint8_t *extradata;
103
    int extradata_size;
104
} MXFDescriptor;
105

    
106
typedef struct {
107
    UID uid;
108
    enum MXFMetadataSetType type;
109
} MXFIndexTableSegment;
110

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

    
121
typedef struct {
122
    UID uid;
123
    enum MXFMetadataSetType type;
124
} MXFMetadataSet;
125

    
126
typedef struct {
127
    UID *packages_refs;
128
    int packages_count;
129
    MXFMetadataSet **metadata_sets;
130
    int metadata_sets_count;
131
    AVFormatContext *fc;
132
    struct AVAES *aesc;
133
    uint8_t *local_tags;
134
    int local_tags_count;
135
} MXFContext;
136

    
137
enum MXFWrappingScheme {
138
    Frame,
139
    Clip,
140
};
141

    
142
typedef struct {
143
    const UID key;
144
    int (*read)();
145
    int ctx_size;
146
    enum MXFMetadataSetType type;
147
} MXFMetadataReadTableEntry;
148

    
149
/* partial keys to match */
150
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
151
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
152
static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
153
/* complete keys to match */
154
static const uint8_t mxf_crypto_source_container_ul[]      = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
155
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
156
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
157
static const uint8_t mxf_sony_mpeg4_extradata[]            = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
158

    
159
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
160

    
161
static int64_t klv_decode_ber_length(ByteIOContext *pb)
162
{
163
    uint64_t size = get_byte(pb);
164
    if (size & 0x80) { /* long form */
165
        int bytes_num = size & 0x7f;
166
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
167
        if (bytes_num > 8)
168
            return -1;
169
        size = 0;
170
        while (bytes_num--)
171
            size = size << 8 | get_byte(pb);
172
    }
173
    return size;
174
}
175

    
176
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
177
{
178
    int i, b;
179
    for (i = 0; i < size && !url_feof(pb); i++) {
180
        b = get_byte(pb);
181
        if (b == key[0])
182
            i = 0;
183
        else if (b != key[i])
184
            i = -1;
185
    }
186
    return i == size;
187
}
188

    
189
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
190
{
191
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
192
        return -1;
193
    klv->offset = url_ftell(pb) - 4;
194
    memcpy(klv->key, mxf_klv_key, 4);
195
    get_buffer(pb, klv->key + 4, 12);
196
    klv->length = klv_decode_ber_length(pb);
197
    return klv->length == -1 ? -1 : 0;
198
}
199

    
200
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
201
{
202
    int i;
203

    
204
    for (i = 0; i < s->nb_streams; i++) {
205
        MXFTrack *track = s->streams[i]->priv_data;
206
        /* SMPTE 379M 7.3 */
207
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
208
            return i;
209
    }
210
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
211
    return s->nb_streams == 1 ? 0 : -1;
212
}
213

    
214
/* XXX: use AVBitStreamFilter */
215
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
216
{
217
    const uint8_t *buf_ptr, *end_ptr;
218
    uint8_t *data_ptr;
219
    int i;
220

    
221
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
222
        return -1;
223
    av_new_packet(pkt, length);
224
    get_buffer(pb, pkt->data, length);
225
    data_ptr = pkt->data;
226
    end_ptr = pkt->data + length;
227
    buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
228
    for (; buf_ptr < end_ptr; ) {
229
        for (i = 0; i < st->codec->channels; i++) {
230
            uint32_t sample = bytestream_get_le32(&buf_ptr);
231
            if (st->codec->bits_per_coded_sample == 24)
232
                bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
233
            else
234
                bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
235
        }
236
        buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
237
    }
238
    pkt->size = data_ptr - pkt->data;
239
    return 0;
240
}
241

    
242
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
243
{
244
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
245
    MXFContext *mxf = s->priv_data;
246
    ByteIOContext *pb = s->pb;
247
    int64_t end = url_ftell(pb) + klv->length;
248
    uint64_t size;
249
    uint64_t orig_size;
250
    uint64_t plaintext_size;
251
    uint8_t ivec[16];
252
    uint8_t tmpbuf[16];
253
    int index;
254

    
255
    if (!mxf->aesc && s->key && s->keylen == 16) {
256
        mxf->aesc = av_malloc(av_aes_size);
257
        if (!mxf->aesc)
258
            return -1;
259
        av_aes_init(mxf->aesc, s->key, 128, 1);
260
    }
261
    // crypto context
262
    url_fskip(pb, klv_decode_ber_length(pb));
263
    // plaintext offset
264
    klv_decode_ber_length(pb);
265
    plaintext_size = get_be64(pb);
266
    // source klv key
267
    klv_decode_ber_length(pb);
268
    get_buffer(pb, klv->key, 16);
269
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
270
        return -1;
271
    index = mxf_get_stream_index(s, klv);
272
    if (index < 0)
273
        return -1;
274
    // source size
275
    klv_decode_ber_length(pb);
276
    orig_size = get_be64(pb);
277
    if (orig_size < plaintext_size)
278
        return -1;
279
    // enc. code
280
    size = klv_decode_ber_length(pb);
281
    if (size < 32 || size - 32 < orig_size)
282
        return -1;
283
    get_buffer(pb, ivec, 16);
284
    get_buffer(pb, tmpbuf, 16);
285
    if (mxf->aesc)
286
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
287
    if (memcmp(tmpbuf, checkv, 16))
288
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
289
    size -= 32;
290
    av_get_packet(pb, pkt, size);
291
    size -= plaintext_size;
292
    if (mxf->aesc)
293
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
294
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
295
    pkt->size = orig_size;
296
    pkt->stream_index = index;
297
    url_fskip(pb, end - url_ftell(pb));
298
    return 0;
299
}
300

    
301
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
302
{
303
    KLVPacket klv;
304

    
305
    while (!url_feof(s->pb)) {
306
        if (klv_read_packet(&klv, s->pb) < 0)
307
            return -1;
308
        PRINT_KEY(s, "read packet", klv.key);
309
        dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
310
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
311
            int res = mxf_decrypt_triplet(s, pkt, &klv);
312
            if (res < 0) {
313
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
314
                return -1;
315
            }
316
            return 0;
317
        }
318
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
319
            int index = mxf_get_stream_index(s, &klv);
320
            if (index < 0) {
321
                av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
322
                goto skip;
323
            }
324
            if (s->streams[index]->discard == AVDISCARD_ALL)
325
                goto skip;
326
            /* check for 8 channels AES3 element */
327
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
328
                if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
329
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
330
                    return -1;
331
                }
332
            } else
333
                av_get_packet(s->pb, pkt, klv.length);
334
            pkt->stream_index = index;
335
            pkt->pos = klv.offset;
336
            return 0;
337
        } else
338
        skip:
339
            url_fskip(s->pb, klv.length);
340
    }
341
    return AVERROR_EOF;
342
}
343

    
344
static int mxf_read_primer_pack(MXFContext *mxf)
345
{
346
    ByteIOContext *pb = mxf->fc->pb;
347
    int item_num = get_be32(pb);
348
    int item_len = get_be32(pb);
349

    
350
    if (item_len != 18) {
351
        av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
352
        return -1;
353
    }
354
    if (item_num > UINT_MAX / item_len)
355
        return -1;
356
    mxf->local_tags_count = item_num;
357
    mxf->local_tags = av_malloc(item_num*item_len);
358
    if (!mxf->local_tags)
359
        return -1;
360
    get_buffer(pb, mxf->local_tags, item_num*item_len);
361
    return 0;
362
}
363

    
364
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
365
{
366
    if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
367
        return AVERROR(ENOMEM);
368
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
369
    if (!mxf->metadata_sets)
370
        return -1;
371
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
372
    mxf->metadata_sets_count++;
373
    return 0;
374
}
375

    
376
static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
377
{
378
    if (size != 16)
379
        return -1;
380
    if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
381
        get_buffer(pb, cryptocontext->source_container_ul, 16);
382
    return 0;
383
}
384

    
385
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
386
{
387
    switch (tag) {
388
    case 0x1901:
389
        mxf->packages_count = get_be32(pb);
390
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
391
            return -1;
392
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
393
        if (!mxf->packages_refs)
394
            return -1;
395
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
396
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
397
        break;
398
    }
399
    return 0;
400
}
401

    
402
static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
403
{
404
    switch(tag) {
405
    case 0x0202:
406
        source_clip->duration = get_be64(pb);
407
        break;
408
    case 0x1201:
409
        source_clip->start_position = get_be64(pb);
410
        break;
411
    case 0x1101:
412
        /* UMID, only get last 16 bytes */
413
        url_fskip(pb, 16);
414
        get_buffer(pb, source_clip->source_package_uid, 16);
415
        break;
416
    case 0x1102:
417
        source_clip->source_track_id = get_be32(pb);
418
        break;
419
    }
420
    return 0;
421
}
422

    
423
static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
424
{
425
    switch(tag) {
426
    case 0x4403:
427
        package->tracks_count = get_be32(pb);
428
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
429
            return -1;
430
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
431
        if (!package->tracks_refs)
432
            return -1;
433
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
434
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
435
        break;
436
    }
437
    return 0;
438
}
439

    
440
static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
441
{
442
    switch(tag) {
443
    case 0x4801:
444
        track->track_id = get_be32(pb);
445
        break;
446
    case 0x4804:
447
        get_buffer(pb, track->track_number, 4);
448
        break;
449
    case 0x4B01:
450
        track->edit_rate.den = get_be32(pb);
451
        track->edit_rate.num = get_be32(pb);
452
        break;
453
    case 0x4803:
454
        get_buffer(pb, track->sequence_ref, 16);
455
        break;
456
    }
457
    return 0;
458
}
459

    
460
static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
461
{
462
    switch(tag) {
463
    case 0x0202:
464
        sequence->duration = get_be64(pb);
465
        break;
466
    case 0x0201:
467
        get_buffer(pb, sequence->data_definition_ul, 16);
468
        break;
469
    case 0x1001:
470
        sequence->structural_components_count = get_be32(pb);
471
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
472
            return -1;
473
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
474
        if (!sequence->structural_components_refs)
475
            return -1;
476
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
477
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
478
        break;
479
    }
480
    return 0;
481
}
482

    
483
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
484
{
485
    switch(tag) {
486
    case 0x4403:
487
        package->tracks_count = get_be32(pb);
488
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
489
            return -1;
490
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
491
        if (!package->tracks_refs)
492
            return -1;
493
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
494
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
495
        break;
496
    case 0x4401:
497
        /* UMID, only get last 16 bytes */
498
        url_fskip(pb, 16);
499
        get_buffer(pb, package->package_uid, 16);
500
        break;
501
    case 0x4701:
502
        get_buffer(pb, package->descriptor_ref, 16);
503
        break;
504
    }
505
    return 0;
506
}
507

    
508
static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag)
509
{
510
    switch(tag) {
511
    case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
512
    case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
513
    case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
514
    case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
515
    case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
516
    case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
517
    }
518
    return 0;
519
}
520

    
521
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
522
{
523
    int code;
524

    
525
    do {
526
        code = get_byte(pb);
527
        dprintf(NULL, "pixel layout: code %#x\n", code);
528
        switch (code) {
529
        case 0x52: /* R */
530
            descriptor->bits_per_sample += get_byte(pb);
531
            break;
532
        case 0x47: /* G */
533
            descriptor->bits_per_sample += get_byte(pb);
534
            break;
535
        case 0x42: /* B */
536
            descriptor->bits_per_sample += get_byte(pb);
537
            break;
538
        default:
539
            get_byte(pb);
540
        }
541
    } while (code != 0); /* SMPTE 377M E.2.46 */
542
}
543

    
544
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
545
{
546
    switch(tag) {
547
    case 0x3F01:
548
        descriptor->sub_descriptors_count = get_be32(pb);
549
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
550
            return -1;
551
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
552
        if (!descriptor->sub_descriptors_refs)
553
            return -1;
554
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
555
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
556
        break;
557
    case 0x3004:
558
        get_buffer(pb, descriptor->essence_container_ul, 16);
559
        break;
560
    case 0x3006:
561
        descriptor->linked_track_id = get_be32(pb);
562
        break;
563
    case 0x3201: /* PictureEssenceCoding */
564
        get_buffer(pb, descriptor->essence_codec_ul, 16);
565
        break;
566
    case 0x3203:
567
        descriptor->width = get_be32(pb);
568
        break;
569
    case 0x3202:
570
        descriptor->height = get_be32(pb);
571
        break;
572
    case 0x320E:
573
        descriptor->aspect_ratio.num = get_be32(pb);
574
        descriptor->aspect_ratio.den = get_be32(pb);
575
        break;
576
    case 0x3D03:
577
        descriptor->sample_rate.num = get_be32(pb);
578
        descriptor->sample_rate.den = get_be32(pb);
579
        break;
580
    case 0x3D06: /* SoundEssenceCompression */
581
        get_buffer(pb, descriptor->essence_codec_ul, 16);
582
        break;
583
    case 0x3D07:
584
        descriptor->channels = get_be32(pb);
585
        break;
586
    case 0x3D01:
587
        descriptor->bits_per_sample = get_be32(pb);
588
        break;
589
    case 0x3401:
590
        mxf_read_pixel_layout(pb, descriptor);
591
        break;
592
    default:
593
        /* Private uid used by SONY C0023S01.mxf */
594
        if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
595
            descriptor->extradata = av_malloc(size);
596
            if (!descriptor->extradata)
597
                return -1;
598
            descriptor->extradata_size = size;
599
            get_buffer(pb, descriptor->extradata, size);
600
        }
601
        break;
602
    }
603
    return 0;
604
}
605

    
606
/*
607
 * Match an uid independently of the version byte and up to len common bytes
608
 * Returns: boolean
609
 */
610
static int mxf_match_uid(const UID key, const UID uid, int len)
611
{
612
    int i;
613
    for (i = 0; i < len; i++) {
614
        if (i != 7 && key[i] != uid[i])
615
            return 0;
616
    }
617
    return 1;
618
}
619

    
620
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
621
{
622
    while (uls->uid[0]) {
623
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
624
            break;
625
        uls++;
626
    }
627
    return uls;
628
}
629

    
630
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
631
{
632
    int i;
633

    
634
    if (!strong_ref)
635
        return NULL;
636
    for (i = 0; i < mxf->metadata_sets_count; i++) {
637
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
638
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
639
            return mxf->metadata_sets[i];
640
        }
641
    }
642
    return NULL;
643
}
644

    
645
static const MXFCodecUL mxf_essence_container_uls[] = {
646
    // video essence container uls
647
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
648
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
649
    // sound essence container uls
650
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
651
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14,       CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
652
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
653
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE },
654
};
655

    
656
static int mxf_parse_structural_metadata(MXFContext *mxf)
657
{
658
    MXFPackage *material_package = NULL;
659
    MXFPackage *temp_package = NULL;
660
    int i, j, k;
661

    
662
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
663
    /* TODO: handle multiple material packages (OP3x) */
664
    for (i = 0; i < mxf->packages_count; i++) {
665
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
666
        if (material_package) break;
667
    }
668
    if (!material_package) {
669
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
670
        return -1;
671
    }
672

    
673
    for (i = 0; i < material_package->tracks_count; i++) {
674
        MXFPackage *source_package = NULL;
675
        MXFTrack *material_track = NULL;
676
        MXFTrack *source_track = NULL;
677
        MXFTrack *temp_track = NULL;
678
        MXFDescriptor *descriptor = NULL;
679
        MXFStructuralComponent *component = NULL;
680
        UID *essence_container_ul = NULL;
681
        const MXFCodecUL *codec_ul = NULL;
682
        const MXFCodecUL *container_ul = NULL;
683
        AVStream *st;
684

    
685
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
686
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
687
            continue;
688
        }
689

    
690
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
691
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
692
            continue;
693
        }
694

    
695
        /* TODO: handle multiple source clips */
696
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
697
            /* TODO: handle timecode component */
698
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
699
            if (!component)
700
                continue;
701

    
702
            for (k = 0; k < mxf->packages_count; k++) {
703
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
704
                if (!temp_package)
705
                    continue;
706
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
707
                    source_package = temp_package;
708
                    break;
709
                }
710
            }
711
            if (!source_package) {
712
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
713
                break;
714
            }
715
            for (k = 0; k < source_package->tracks_count; k++) {
716
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
717
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
718
                    return -1;
719
                }
720
                if (temp_track->track_id == component->source_track_id) {
721
                    source_track = temp_track;
722
                    break;
723
                }
724
            }
725
            if (!source_track) {
726
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
727
                break;
728
            }
729
        }
730
        if (!source_track)
731
            continue;
732

    
733
        st = av_new_stream(mxf->fc, source_track->track_id);
734
        if (!st) {
735
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
736
            return -1;
737
        }
738
        st->priv_data = source_track;
739
        st->duration = component->duration;
740
        if (st->duration == -1)
741
            st->duration = AV_NOPTS_VALUE;
742
        st->start_time = component->start_position;
743
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
744

    
745
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
746
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
747
            return -1;
748
        }
749

    
750
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
751
        codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
752
        st->codec->codec_type = codec_ul->id;
753

    
754
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
755
        if (source_package->descriptor) {
756
            if (source_package->descriptor->type == MultipleDescriptor) {
757
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
758
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
759

    
760
                    if (!sub_descriptor) {
761
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
762
                        continue;
763
                    }
764
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
765
                        descriptor = sub_descriptor;
766
                        break;
767
                    }
768
                }
769
            } else if (source_package->descriptor->type == Descriptor)
770
                descriptor = source_package->descriptor;
771
        }
772
        if (!descriptor) {
773
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
774
            continue;
775
        }
776
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
777
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
778
        essence_container_ul = &descriptor->essence_container_ul;
779
        /* HACK: replacing the original key with mxf_encrypted_essence_container
780
         * is not allowed according to s429-6, try to find correct information anyway */
781
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
782
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
783
            for (k = 0; k < mxf->metadata_sets_count; k++) {
784
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
785
                if (metadata->type == CryptoContext) {
786
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
787
                    break;
788
                }
789
            }
790
        }
791
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
792
        codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
793
        st->codec->codec_id = codec_ul->id;
794
        if (descriptor->extradata) {
795
            st->codec->extradata = descriptor->extradata;
796
            st->codec->extradata_size = descriptor->extradata_size;
797
        }
798
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
799
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
800
            if (st->codec->codec_id == CODEC_ID_NONE)
801
                st->codec->codec_id = container_ul->id;
802
            st->codec->width = descriptor->width;
803
            st->codec->height = descriptor->height;
804
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
805
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
806
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
807
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
808
            if (st->codec->codec_id == CODEC_ID_NONE)
809
                st->codec->codec_id = container_ul->id;
810
            st->codec->channels = descriptor->channels;
811
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
812
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
813
            /* TODO: implement CODEC_ID_RAWAUDIO */
814
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
815
                if (descriptor->bits_per_sample == 24)
816
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
817
                else if (descriptor->bits_per_sample == 32)
818
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
819
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
820
                if (descriptor->bits_per_sample == 24)
821
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
822
                else if (descriptor->bits_per_sample == 32)
823
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
824
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
825
                st->need_parsing = AVSTREAM_PARSE_FULL;
826
            }
827
        }
828
        if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
829
            av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
830
            st->need_parsing = AVSTREAM_PARSE_FULL;
831
        }
832
    }
833
    return 0;
834
}
835

    
836
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
837
    { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
838
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
839
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
840
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
841
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
842
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
843
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
844
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
845
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
846
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
847
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
848
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
849
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
850
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
851
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
852
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
853
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
854
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
855
};
856

    
857
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
858
{
859
    ByteIOContext *pb = mxf->fc->pb;
860
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
861
    uint64_t klv_end = url_ftell(pb) + klv->length;
862

    
863
    if (!ctx)
864
        return -1;
865
    while (url_ftell(pb) + 4 < klv_end) {
866
        int tag = get_be16(pb);
867
        int size = get_be16(pb); /* KLV specified by 0x53 */
868
        uint64_t next = url_ftell(pb) + size;
869
        UID uid = {0};
870

    
871
        dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
872
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
873
            av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
874
            continue;
875
        }
876
        if (tag > 0x7FFF) { /* dynamic tag */
877
            int i;
878
            for (i = 0; i < mxf->local_tags_count; i++) {
879
                int local_tag = AV_RB16(mxf->local_tags+i*18);
880
                if (local_tag == tag) {
881
                    memcpy(uid, mxf->local_tags+i*18+2, 16);
882
                    dprintf(mxf->fc, "local tag %#04x\n", local_tag);
883
                    PRINT_KEY(mxf->fc, "uid", uid);
884
                }
885
            }
886
        }
887
        if (ctx_size && tag == 0x3C0A)
888
            get_buffer(pb, ctx->uid, 16);
889
        else if (read_child(ctx, pb, tag, size, uid) < 0)
890
            return -1;
891

    
892
        url_fseek(pb, next, SEEK_SET);
893
    }
894
    if (ctx_size) ctx->type = type;
895
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
896
}
897

    
898
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
899
{
900
    MXFContext *mxf = s->priv_data;
901
    KLVPacket klv;
902

    
903
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
904
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
905
        return -1;
906
    }
907
    url_fseek(s->pb, -14, SEEK_CUR);
908
    mxf->fc = s;
909
    while (!url_feof(s->pb)) {
910
        const MXFMetadataReadTableEntry *metadata;
911

    
912
        if (klv_read_packet(&klv, s->pb) < 0)
913
            return -1;
914
        PRINT_KEY(s, "read header", klv.key);
915
        dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
916
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
917
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
918
            /* FIXME avoid seek */
919
            url_fseek(s->pb, klv.offset, SEEK_SET);
920
            break;
921
        }
922

    
923
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
924
            if (IS_KLV_KEY(klv.key, metadata->key)) {
925
                int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
926
                if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
927
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
928
                    return -1;
929
                }
930
                break;
931
            }
932
        }
933
        if (!metadata->read)
934
            url_fskip(s->pb, klv.length);
935
    }
936
    return mxf_parse_structural_metadata(mxf);
937
}
938

    
939
static int mxf_read_close(AVFormatContext *s)
940
{
941
    MXFContext *mxf = s->priv_data;
942
    int i;
943

    
944
    av_freep(&mxf->packages_refs);
945

    
946
    for (i = 0; i < s->nb_streams; i++)
947
        s->streams[i]->priv_data = NULL;
948

    
949
    for (i = 0; i < mxf->metadata_sets_count; i++) {
950
        switch (mxf->metadata_sets[i]->type) {
951
        case MultipleDescriptor:
952
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
953
            break;
954
        case Sequence:
955
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
956
            break;
957
        case SourcePackage:
958
        case MaterialPackage:
959
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
960
            break;
961
        default:
962
            break;
963
        }
964
        av_freep(&mxf->metadata_sets[i]);
965
    }
966
    av_freep(&mxf->metadata_sets);
967
    av_freep(&mxf->aesc);
968
    av_freep(&mxf->local_tags);
969
    return 0;
970
}
971

    
972
static int mxf_probe(AVProbeData *p) {
973
    uint8_t *bufp = p->buf;
974
    uint8_t *end = p->buf + p->buf_size;
975

    
976
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
977
        return 0;
978

    
979
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
980
    end -= sizeof(mxf_header_partition_pack_key);
981
    for (; bufp < end; bufp++) {
982
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
983
            return AVPROBE_SCORE_MAX;
984
    }
985
    return 0;
986
}
987

    
988
/* rudimentary byte seek */
989
/* XXX: use MXF Index */
990
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
991
{
992
    AVStream *st = s->streams[stream_index];
993
    int64_t seconds;
994

    
995
    if (!s->bit_rate)
996
        return -1;
997
    if (sample_time < 0)
998
        sample_time = 0;
999
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1000
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1001
    av_update_cur_dts(s, st, sample_time);
1002
    return 0;
1003
}
1004

    
1005
AVInputFormat mxf_demuxer = {
1006
    "mxf",
1007
    NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1008
    sizeof(MXFContext),
1009
    mxf_probe,
1010
    mxf_read_header,
1011
    mxf_read_packet,
1012
    mxf_read_close,
1013
    mxf_read_seek,
1014
};