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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
24
 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25
 * SMPTE 377M MXF File Format Specifications
26
 * SMPTE 378M Operational Pattern 1a
27
 * SMPTE 379M MXF Generic Container
28
 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29
 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
31
 *
32
 * Principle
33
 * Search for Track numbers which will identify essence element KLV packets.
34
 * Search for SourcePackage which define tracks which contains Track numbers.
35
 * Material Package contains tracks with reference to SourcePackage tracks.
36
 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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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
    uint8_t buffer[61444];
218
    const uint8_t *buf_ptr, *end_ptr;
219
    uint8_t *data_ptr;
220
    int i;
221

    
222
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
223
        return -1;
224
    get_buffer(pb, buffer, length);
225
    av_new_packet(pkt, length);
226
    data_ptr = pkt->data;
227
    end_ptr = buffer + length;
228
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
229
    for (; buf_ptr < end_ptr; ) {
230
        for (i = 0; i < st->codec->channels; i++) {
231
            uint32_t sample = bytestream_get_le32(&buf_ptr);
232
            if (st->codec->bits_per_coded_sample == 24)
233
                bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
234
            else
235
                bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
236
        }
237
        buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
238
    }
239
    pkt->size = data_ptr - pkt->data;
240
    return 0;
241
}
242

    
243
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
244
{
245
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
246
    MXFContext *mxf = s->priv_data;
247
    ByteIOContext *pb = s->pb;
248
    int64_t end = url_ftell(pb) + klv->length;
249
    uint64_t size;
250
    uint64_t orig_size;
251
    uint64_t plaintext_size;
252
    uint8_t ivec[16];
253
    uint8_t tmpbuf[16];
254
    int index;
255

    
256
    if (!mxf->aesc && s->key && s->keylen == 16) {
257
        mxf->aesc = av_malloc(av_aes_size);
258
        if (!mxf->aesc)
259
            return -1;
260
        av_aes_init(mxf->aesc, s->key, 128, 1);
261
    }
262
    // crypto context
263
    url_fskip(pb, klv_decode_ber_length(pb));
264
    // plaintext offset
265
    klv_decode_ber_length(pb);
266
    plaintext_size = get_be64(pb);
267
    // source klv key
268
    klv_decode_ber_length(pb);
269
    get_buffer(pb, klv->key, 16);
270
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
271
        return -1;
272
    index = mxf_get_stream_index(s, klv);
273
    if (index < 0)
274
        return -1;
275
    // source size
276
    klv_decode_ber_length(pb);
277
    orig_size = get_be64(pb);
278
    if (orig_size < plaintext_size)
279
        return -1;
280
    // enc. code
281
    size = klv_decode_ber_length(pb);
282
    if (size < 32 || size - 32 < orig_size)
283
        return -1;
284
    get_buffer(pb, ivec, 16);
285
    get_buffer(pb, tmpbuf, 16);
286
    if (mxf->aesc)
287
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
288
    if (memcmp(tmpbuf, checkv, 16))
289
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
290
    size -= 32;
291
    av_get_packet(pb, pkt, size);
292
    size -= plaintext_size;
293
    if (mxf->aesc)
294
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
295
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
296
    pkt->size = orig_size;
297
    pkt->stream_index = index;
298
    url_fskip(pb, end - url_ftell(pb));
299
    return 0;
300
}
301

    
302
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
303
{
304
    KLVPacket klv;
305

    
306
    while (!url_feof(s->pb)) {
307
        if (klv_read_packet(&klv, s->pb) < 0)
308
            return -1;
309
        PRINT_KEY(s, "read packet", klv.key);
310
        dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
311
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
312
            int res = mxf_decrypt_triplet(s, pkt, &klv);
313
            if (res < 0) {
314
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
315
                return -1;
316
            }
317
            return 0;
318
        }
319
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
320
            int index = mxf_get_stream_index(s, &klv);
321
            if (index < 0) {
322
                av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
323
                goto skip;
324
            }
325
            if (s->streams[index]->discard == AVDISCARD_ALL)
326
                goto skip;
327
            /* check for 8 channels AES3 element */
328
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
329
                if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
330
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
331
                    return -1;
332
                }
333
            } else
334
                av_get_packet(s->pb, pkt, klv.length);
335
            pkt->stream_index = index;
336
            pkt->pos = klv.offset;
337
            return 0;
338
        } else
339
        skip:
340
            url_fskip(s->pb, klv.length);
341
    }
342
    return AVERROR(EIO);
343
}
344

    
345
static int mxf_read_primer_pack(MXFContext *mxf)
346
{
347
    ByteIOContext *pb = mxf->fc->pb;
348
    int item_num = get_be32(pb);
349
    int item_len = get_be32(pb);
350

    
351
    if (item_len != 18) {
352
        av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
353
        return -1;
354
    }
355
    if (item_num > UINT_MAX / item_len)
356
        return -1;
357
    mxf->local_tags_count = item_num;
358
    mxf->local_tags = av_malloc(item_num*item_len);
359
    if (!mxf->local_tags)
360
        return -1;
361
    get_buffer(pb, mxf->local_tags, item_num*item_len);
362
    return 0;
363
}
364

    
365
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
366
{
367
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
368
    if (!mxf->metadata_sets)
369
        return -1;
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_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
376
{
377
    if (size != 16)
378
        return -1;
379
    if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
380
        get_buffer(pb, cryptocontext->source_container_ul, 16);
381
    return 0;
382
}
383

    
384
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
385
{
386
    switch (tag) {
387
    case 0x1901:
388
        mxf->packages_count = get_be32(pb);
389
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
390
            return -1;
391
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
392
        if (!mxf->packages_refs)
393
            return -1;
394
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
395
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
396
        break;
397
    }
398
    return 0;
399
}
400

    
401
static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
402
{
403
    switch(tag) {
404
    case 0x0202:
405
        source_clip->duration = get_be64(pb);
406
        break;
407
    case 0x1201:
408
        source_clip->start_position = get_be64(pb);
409
        break;
410
    case 0x1101:
411
        /* UMID, only get last 16 bytes */
412
        url_fskip(pb, 16);
413
        get_buffer(pb, source_clip->source_package_uid, 16);
414
        break;
415
    case 0x1102:
416
        source_clip->source_track_id = get_be32(pb);
417
        break;
418
    }
419
    return 0;
420
}
421

    
422
static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
423
{
424
    switch(tag) {
425
    case 0x4403:
426
        package->tracks_count = get_be32(pb);
427
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
428
            return -1;
429
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
430
        if (!package->tracks_refs)
431
            return -1;
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_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_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
        if (!sequence->structural_components_refs)
474
            return -1;
475
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
476
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
477
        break;
478
    }
479
    return 0;
480
}
481

    
482
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
483
{
484
    switch(tag) {
485
    case 0x4403:
486
        package->tracks_count = get_be32(pb);
487
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
488
            return -1;
489
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
490
        if (!package->tracks_refs)
491
            return -1;
492
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
493
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
494
        break;
495
    case 0x4401:
496
        /* UMID, only get last 16 bytes */
497
        url_fskip(pb, 16);
498
        get_buffer(pb, package->package_uid, 16);
499
        break;
500
    case 0x4701:
501
        get_buffer(pb, package->descriptor_ref, 16);
502
        break;
503
    }
504
    return 0;
505
}
506

    
507
static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag)
508
{
509
    switch(tag) {
510
    case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
511
    case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
512
    case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
513
    case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
514
    case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
515
    case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
516
    }
517
    return 0;
518
}
519

    
520
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
521
{
522
    int code;
523

    
524
    do {
525
        code = get_byte(pb);
526
        dprintf(NULL, "pixel layout: code %#x\n", code);
527
        switch (code) {
528
        case 0x52: /* R */
529
            descriptor->bits_per_sample += get_byte(pb);
530
            break;
531
        case 0x47: /* G */
532
            descriptor->bits_per_sample += get_byte(pb);
533
            break;
534
        case 0x42: /* B */
535
            descriptor->bits_per_sample += get_byte(pb);
536
            break;
537
        default:
538
            get_byte(pb);
539
        }
540
    } while (code != 0); /* SMPTE 377M E.2.46 */
541
}
542

    
543
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
544
{
545
    switch(tag) {
546
    case 0x3F01:
547
        descriptor->sub_descriptors_count = get_be32(pb);
548
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
549
            return -1;
550
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
551
        if (!descriptor->sub_descriptors_refs)
552
            return -1;
553
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
554
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
555
        break;
556
    case 0x3004:
557
        get_buffer(pb, descriptor->essence_container_ul, 16);
558
        break;
559
    case 0x3006:
560
        descriptor->linked_track_id = get_be32(pb);
561
        break;
562
    case 0x3201: /* PictureEssenceCoding */
563
        get_buffer(pb, descriptor->essence_codec_ul, 16);
564
        break;
565
    case 0x3203:
566
        descriptor->width = get_be32(pb);
567
        break;
568
    case 0x3202:
569
        descriptor->height = get_be32(pb);
570
        break;
571
    case 0x320E:
572
        descriptor->aspect_ratio.num = get_be32(pb);
573
        descriptor->aspect_ratio.den = get_be32(pb);
574
        break;
575
    case 0x3D03:
576
        descriptor->sample_rate.num = get_be32(pb);
577
        descriptor->sample_rate.den = get_be32(pb);
578
        break;
579
    case 0x3D06: /* SoundEssenceCompression */
580
        get_buffer(pb, descriptor->essence_codec_ul, 16);
581
        break;
582
    case 0x3D07:
583
        descriptor->channels = get_be32(pb);
584
        break;
585
    case 0x3D01:
586
        descriptor->bits_per_sample = get_be32(pb);
587
        break;
588
    case 0x3401:
589
        mxf_read_pixel_layout(pb, descriptor);
590
        break;
591
    default:
592
        /* Private uid used by SONY C0023S01.mxf */
593
        if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
594
            descriptor->extradata = av_malloc(size);
595
            if (!descriptor->extradata)
596
                return -1;
597
            descriptor->extradata_size = size;
598
            get_buffer(pb, descriptor->extradata, size);
599
        }
600
        break;
601
    }
602
    return 0;
603
}
604

    
605
/*
606
 * Match an uid independently of the version byte and up to len common bytes
607
 * Returns: boolean
608
 */
609
static int mxf_match_uid(const UID key, const UID uid, int len)
610
{
611
    int i;
612
    for (i = 0; i < len; i++) {
613
        if (i != 7 && key[i] != uid[i])
614
            return 0;
615
    }
616
    return 1;
617
}
618

    
619
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
620
{
621
    while (uls->uid[0]) {
622
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
623
            break;
624
        uls++;
625
    }
626
    return uls;
627
}
628

    
629
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
630
{
631
    int i;
632

    
633
    if (!strong_ref)
634
        return NULL;
635
    for (i = 0; i < mxf->metadata_sets_count; i++) {
636
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
637
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
638
            return mxf->metadata_sets[i];
639
        }
640
    }
641
    return NULL;
642
}
643

    
644
static const MXFCodecUL mxf_essence_container_uls[] = {
645
    // video essence container uls
646
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
647
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
648
    // sound essence container uls
649
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
650
    { { 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 */
651
    { { 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 */
652
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE },
653
};
654

    
655
static int mxf_parse_structural_metadata(MXFContext *mxf)
656
{
657
    MXFPackage *material_package = NULL;
658
    MXFPackage *temp_package = NULL;
659
    int i, j, k;
660

    
661
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
662
    /* TODO: handle multiple material packages (OP3x) */
663
    for (i = 0; i < mxf->packages_count; i++) {
664
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
665
        if (material_package) break;
666
    }
667
    if (!material_package) {
668
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
669
        return -1;
670
    }
671

    
672
    for (i = 0; i < material_package->tracks_count; i++) {
673
        MXFPackage *source_package = NULL;
674
        MXFTrack *material_track = NULL;
675
        MXFTrack *source_track = NULL;
676
        MXFTrack *temp_track = NULL;
677
        MXFDescriptor *descriptor = NULL;
678
        MXFStructuralComponent *component = NULL;
679
        UID *essence_container_ul = NULL;
680
        const MXFCodecUL *codec_ul = NULL;
681
        const MXFCodecUL *container_ul = NULL;
682
        AVStream *st;
683

    
684
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
685
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
686
            continue;
687
        }
688

    
689
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
690
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
691
            return -1;
692
        }
693

    
694
        /* TODO: handle multiple source clips */
695
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
696
            /* TODO: handle timecode component */
697
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
698
            if (!component)
699
                continue;
700

    
701
            for (k = 0; k < mxf->packages_count; k++) {
702
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
703
                if (!temp_package)
704
                    continue;
705
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
706
                    source_package = temp_package;
707
                    break;
708
                }
709
            }
710
            if (!source_package) {
711
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
712
                break;
713
            }
714
            for (k = 0; k < source_package->tracks_count; k++) {
715
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
716
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
717
                    return -1;
718
                }
719
                if (temp_track->track_id == component->source_track_id) {
720
                    source_track = temp_track;
721
                    break;
722
                }
723
            }
724
            if (!source_track) {
725
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
726
                break;
727
            }
728
        }
729
        if (!source_track)
730
            continue;
731

    
732
        st = av_new_stream(mxf->fc, source_track->track_id);
733
        if (!st) {
734
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
735
            return -1;
736
        }
737
        st->priv_data = source_track;
738
        st->duration = component->duration;
739
        if (st->duration == -1)
740
            st->duration = AV_NOPTS_VALUE;
741
        st->start_time = component->start_position;
742
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
743

    
744
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
745
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
746
            return -1;
747
        }
748

    
749
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
750
        codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
751
        st->codec->codec_type = codec_ul->id;
752

    
753
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
754
        if (source_package->descriptor) {
755
            if (source_package->descriptor->type == MultipleDescriptor) {
756
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
757
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
758

    
759
                    if (!sub_descriptor) {
760
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
761
                        continue;
762
                    }
763
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
764
                        descriptor = sub_descriptor;
765
                        break;
766
                    }
767
                }
768
            } else if (source_package->descriptor->type == Descriptor)
769
                descriptor = source_package->descriptor;
770
        }
771
        if (!descriptor) {
772
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
773
            continue;
774
        }
775
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
776
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
777
        essence_container_ul = &descriptor->essence_container_ul;
778
        /* HACK: replacing the original key with mxf_encrypted_essence_container
779
         * is not allowed according to s429-6, try to find correct information anyway */
780
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
781
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
782
            for (k = 0; k < mxf->metadata_sets_count; k++) {
783
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
784
                if (metadata->type == CryptoContext) {
785
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
786
                    break;
787
                }
788
            }
789
        }
790
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
791
        codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
792
        st->codec->codec_id = codec_ul->id;
793
        if (descriptor->extradata) {
794
            st->codec->extradata = descriptor->extradata;
795
            st->codec->extradata_size = descriptor->extradata_size;
796
        }
797
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
798
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
799
            if (st->codec->codec_id == CODEC_ID_NONE)
800
                st->codec->codec_id = container_ul->id;
801
            st->codec->width = descriptor->width;
802
            st->codec->height = descriptor->height;
803
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
804
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
805
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
806
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
807
            if (st->codec->codec_id == CODEC_ID_NONE)
808
                st->codec->codec_id = container_ul->id;
809
            st->codec->channels = descriptor->channels;
810
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
811
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
812
            /* TODO: implement CODEC_ID_RAWAUDIO */
813
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
814
                if (descriptor->bits_per_sample == 24)
815
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
816
                else if (descriptor->bits_per_sample == 32)
817
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
818
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
819
                if (descriptor->bits_per_sample == 24)
820
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
821
                else if (descriptor->bits_per_sample == 32)
822
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
823
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
824
                st->need_parsing = AVSTREAM_PARSE_FULL;
825
            }
826
        }
827
        if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
828
            av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
829
            st->need_parsing = AVSTREAM_PARSE_FULL;
830
        }
831
    }
832
    return 0;
833
}
834

    
835
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
836
    { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
837
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
838
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
839
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
840
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
841
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
842
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
843
    { { 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 */
844
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
845
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
846
    { { 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 */
847
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
848
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
849
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
850
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
851
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
852
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
853
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
854
};
855

    
856
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
857
{
858
    ByteIOContext *pb = mxf->fc->pb;
859
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
860
    uint64_t klv_end = url_ftell(pb) + klv->length;
861

    
862
    if (!ctx)
863
        return -1;
864
    while (url_ftell(pb) + 4 < klv_end) {
865
        int tag = get_be16(pb);
866
        int size = get_be16(pb); /* KLV specified by 0x53 */
867
        uint64_t next = url_ftell(pb) + size;
868
        UID uid = {0};
869

    
870
        dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
871
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
872
            av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
873
            continue;
874
        }
875
        if (tag > 0x7FFF) { /* dynamic tag */
876
            int i;
877
            for (i = 0; i < mxf->local_tags_count; i++) {
878
                int local_tag = AV_RB16(mxf->local_tags+i*18);
879
                if (local_tag == tag) {
880
                    memcpy(uid, mxf->local_tags+i*18+2, 16);
881
                    dprintf(mxf->fc, "local tag %#04x\n", local_tag);
882
                    PRINT_KEY(mxf->fc, "uid", uid);
883
                }
884
            }
885
        }
886
        if (ctx_size && tag == 0x3C0A)
887
            get_buffer(pb, ctx->uid, 16);
888
        else if (read_child(ctx, pb, tag, size, uid) < 0)
889
            return -1;
890

    
891
        url_fseek(pb, next, SEEK_SET);
892
    }
893
    if (ctx_size) ctx->type = type;
894
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
895
}
896

    
897
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
898
{
899
    MXFContext *mxf = s->priv_data;
900
    KLVPacket klv;
901

    
902
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
903
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
904
        return -1;
905
    }
906
    url_fseek(s->pb, -14, SEEK_CUR);
907
    mxf->fc = s;
908
    while (!url_feof(s->pb)) {
909
        const MXFMetadataReadTableEntry *metadata;
910

    
911
        if (klv_read_packet(&klv, s->pb) < 0)
912
            return -1;
913
        PRINT_KEY(s, "read header", klv.key);
914
        dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
915
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
916
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
917
            /* FIXME avoid seek */
918
            url_fseek(s->pb, klv.offset, SEEK_SET);
919
            break;
920
        }
921

    
922
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
923
            if (IS_KLV_KEY(klv.key, metadata->key)) {
924
                int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
925
                if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
926
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
927
                    return -1;
928
                }
929
                break;
930
            }
931
        }
932
        if (!metadata->read)
933
            url_fskip(s->pb, klv.length);
934
    }
935
    return mxf_parse_structural_metadata(mxf);
936
}
937

    
938
static int mxf_read_close(AVFormatContext *s)
939
{
940
    MXFContext *mxf = s->priv_data;
941
    int i;
942

    
943
    av_freep(&mxf->packages_refs);
944
    for (i = 0; i < mxf->metadata_sets_count; i++) {
945
        switch (mxf->metadata_sets[i]->type) {
946
        case MultipleDescriptor:
947
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
948
            break;
949
        case Sequence:
950
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
951
            break;
952
        case SourcePackage:
953
        case MaterialPackage:
954
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
955
            break;
956
        case Track:
957
            mxf->metadata_sets[i] = NULL; /* will be freed later */
958
            break;
959
        default:
960
            break;
961
        }
962
        av_freep(&mxf->metadata_sets[i]);
963
    }
964
    av_freep(&mxf->metadata_sets);
965
    av_freep(&mxf->aesc);
966
    av_freep(&mxf->local_tags);
967
    return 0;
968
}
969

    
970
static int mxf_probe(AVProbeData *p) {
971
    uint8_t *bufp = p->buf;
972
    uint8_t *end = p->buf + p->buf_size;
973

    
974
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
975
        return 0;
976

    
977
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
978
    end -= sizeof(mxf_header_partition_pack_key);
979
    for (; bufp < end; bufp++) {
980
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
981
            return AVPROBE_SCORE_MAX;
982
    }
983
    return 0;
984
}
985

    
986
/* rudimentary byte seek */
987
/* XXX: use MXF Index */
988
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
989
{
990
    AVStream *st = s->streams[stream_index];
991
    int64_t seconds;
992

    
993
    if (!s->bit_rate)
994
        return -1;
995
    if (sample_time < 0)
996
        sample_time = 0;
997
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
998
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
999
    av_update_cur_dts(s, st, sample_time);
1000
    return 0;
1001
}
1002

    
1003
AVInputFormat mxf_demuxer = {
1004
    "mxf",
1005
    NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1006
    sizeof(MXFContext),
1007
    mxf_probe,
1008
    mxf_read_header,
1009
    mxf_read_packet,
1010
    mxf_read_close,
1011
    mxf_read_seek,
1012
};