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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
20
 */
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
    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
    if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
368
        return AVERROR(ENOMEM);
369
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
370
    if (!mxf->metadata_sets)
371
        return -1;
372
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
373
    mxf->metadata_sets_count++;
374
    return 0;
375
}
376

    
377
static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
378
{
379
    if (size != 16)
380
        return -1;
381
    if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
382
        get_buffer(pb, cryptocontext->source_container_ul, 16);
383
    return 0;
384
}
385

    
386
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
387
{
388
    switch (tag) {
389
    case 0x1901:
390
        mxf->packages_count = get_be32(pb);
391
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
392
            return -1;
393
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
394
        if (!mxf->packages_refs)
395
            return -1;
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_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_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
        if (!package->tracks_refs)
433
            return -1;
434
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
435
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
436
        break;
437
    }
438
    return 0;
439
}
440

    
441
static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
442
{
443
    switch(tag) {
444
    case 0x4801:
445
        track->track_id = get_be32(pb);
446
        break;
447
    case 0x4804:
448
        get_buffer(pb, track->track_number, 4);
449
        break;
450
    case 0x4B01:
451
        track->edit_rate.den = get_be32(pb);
452
        track->edit_rate.num = get_be32(pb);
453
        break;
454
    case 0x4803:
455
        get_buffer(pb, track->sequence_ref, 16);
456
        break;
457
    }
458
    return 0;
459
}
460

    
461
static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
462
{
463
    switch(tag) {
464
    case 0x0202:
465
        sequence->duration = get_be64(pb);
466
        break;
467
    case 0x0201:
468
        get_buffer(pb, sequence->data_definition_ul, 16);
469
        break;
470
    case 0x1001:
471
        sequence->structural_components_count = get_be32(pb);
472
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
473
            return -1;
474
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
475
        if (!sequence->structural_components_refs)
476
            return -1;
477
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
478
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
479
        break;
480
    }
481
    return 0;
482
}
483

    
484
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
485
{
486
    switch(tag) {
487
    case 0x4403:
488
        package->tracks_count = get_be32(pb);
489
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
490
            return -1;
491
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
492
        if (!package->tracks_refs)
493
            return -1;
494
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
495
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
496
        break;
497
    case 0x4401:
498
        /* UMID, only get last 16 bytes */
499
        url_fskip(pb, 16);
500
        get_buffer(pb, package->package_uid, 16);
501
        break;
502
    case 0x4701:
503
        get_buffer(pb, package->descriptor_ref, 16);
504
        break;
505
    }
506
    return 0;
507
}
508

    
509
static int mxf_read_index_table_segment(MXFIndexTableSegment *segment, ByteIOContext *pb, int tag)
510
{
511
    switch(tag) {
512
    case 0x3F05: dprintf(NULL, "EditUnitByteCount %d\n", get_be32(pb)); break;
513
    case 0x3F06: dprintf(NULL, "IndexSID %d\n", get_be32(pb)); break;
514
    case 0x3F07: dprintf(NULL, "BodySID %d\n", get_be32(pb)); break;
515
    case 0x3F0B: dprintf(NULL, "IndexEditRate %d/%d\n", get_be32(pb), get_be32(pb)); break;
516
    case 0x3F0C: dprintf(NULL, "IndexStartPosition %lld\n", get_be64(pb)); break;
517
    case 0x3F0D: dprintf(NULL, "IndexDuration %lld\n", get_be64(pb)); break;
518
    }
519
    return 0;
520
}
521

    
522
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
523
{
524
    int code;
525

    
526
    do {
527
        code = get_byte(pb);
528
        dprintf(NULL, "pixel layout: code %#x\n", code);
529
        switch (code) {
530
        case 0x52: /* R */
531
            descriptor->bits_per_sample += get_byte(pb);
532
            break;
533
        case 0x47: /* G */
534
            descriptor->bits_per_sample += get_byte(pb);
535
            break;
536
        case 0x42: /* B */
537
            descriptor->bits_per_sample += get_byte(pb);
538
            break;
539
        default:
540
            get_byte(pb);
541
        }
542
    } while (code != 0); /* SMPTE 377M E.2.46 */
543
}
544

    
545
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
546
{
547
    switch(tag) {
548
    case 0x3F01:
549
        descriptor->sub_descriptors_count = get_be32(pb);
550
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
551
            return -1;
552
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
553
        if (!descriptor->sub_descriptors_refs)
554
            return -1;
555
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
556
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
557
        break;
558
    case 0x3004:
559
        get_buffer(pb, descriptor->essence_container_ul, 16);
560
        break;
561
    case 0x3006:
562
        descriptor->linked_track_id = get_be32(pb);
563
        break;
564
    case 0x3201: /* PictureEssenceCoding */
565
        get_buffer(pb, descriptor->essence_codec_ul, 16);
566
        break;
567
    case 0x3203:
568
        descriptor->width = get_be32(pb);
569
        break;
570
    case 0x3202:
571
        descriptor->height = get_be32(pb);
572
        break;
573
    case 0x320E:
574
        descriptor->aspect_ratio.num = get_be32(pb);
575
        descriptor->aspect_ratio.den = get_be32(pb);
576
        break;
577
    case 0x3D03:
578
        descriptor->sample_rate.num = get_be32(pb);
579
        descriptor->sample_rate.den = get_be32(pb);
580
        break;
581
    case 0x3D06: /* SoundEssenceCompression */
582
        get_buffer(pb, descriptor->essence_codec_ul, 16);
583
        break;
584
    case 0x3D07:
585
        descriptor->channels = get_be32(pb);
586
        break;
587
    case 0x3D01:
588
        descriptor->bits_per_sample = get_be32(pb);
589
        break;
590
    case 0x3401:
591
        mxf_read_pixel_layout(pb, descriptor);
592
        break;
593
    default:
594
        /* Private uid used by SONY C0023S01.mxf */
595
        if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
596
            descriptor->extradata = av_malloc(size);
597
            if (!descriptor->extradata)
598
                return -1;
599
            descriptor->extradata_size = size;
600
            get_buffer(pb, descriptor->extradata, size);
601
        }
602
        break;
603
    }
604
    return 0;
605
}
606

    
607
/*
608
 * Match an uid independently of the version byte and up to len common bytes
609
 * Returns: boolean
610
 */
611
static int mxf_match_uid(const UID key, const UID uid, int len)
612
{
613
    int i;
614
    for (i = 0; i < len; i++) {
615
        if (i != 7 && key[i] != uid[i])
616
            return 0;
617
    }
618
    return 1;
619
}
620

    
621
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
622
{
623
    while (uls->uid[0]) {
624
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
625
            break;
626
        uls++;
627
    }
628
    return uls;
629
}
630

    
631
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
632
{
633
    int i;
634

    
635
    if (!strong_ref)
636
        return NULL;
637
    for (i = 0; i < mxf->metadata_sets_count; i++) {
638
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
639
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
640
            return mxf->metadata_sets[i];
641
        }
642
    }
643
    return NULL;
644
}
645

    
646
static const MXFCodecUL mxf_essence_container_uls[] = {
647
    // video essence container uls
648
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
649
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
650
    // sound essence container uls
651
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
652
    { { 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 */
653
    { { 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 */
654
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE },
655
};
656

    
657
static int mxf_parse_structural_metadata(MXFContext *mxf)
658
{
659
    MXFPackage *material_package = NULL;
660
    MXFPackage *temp_package = NULL;
661
    int i, j, k;
662

    
663
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
664
    /* TODO: handle multiple material packages (OP3x) */
665
    for (i = 0; i < mxf->packages_count; i++) {
666
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
667
        if (material_package) break;
668
    }
669
    if (!material_package) {
670
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
671
        return -1;
672
    }
673

    
674
    for (i = 0; i < material_package->tracks_count; i++) {
675
        MXFPackage *source_package = NULL;
676
        MXFTrack *material_track = NULL;
677
        MXFTrack *source_track = NULL;
678
        MXFTrack *temp_track = NULL;
679
        MXFDescriptor *descriptor = NULL;
680
        MXFStructuralComponent *component = NULL;
681
        UID *essence_container_ul = NULL;
682
        const MXFCodecUL *codec_ul = NULL;
683
        const MXFCodecUL *container_ul = NULL;
684
        AVStream *st;
685

    
686
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
687
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
688
            continue;
689
        }
690

    
691
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
692
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
693
            return -1;
694
        }
695

    
696
        /* TODO: handle multiple source clips */
697
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
698
            /* TODO: handle timecode component */
699
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
700
            if (!component)
701
                continue;
702

    
703
            for (k = 0; k < mxf->packages_count; k++) {
704
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
705
                if (!temp_package)
706
                    continue;
707
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
708
                    source_package = temp_package;
709
                    break;
710
                }
711
            }
712
            if (!source_package) {
713
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
714
                break;
715
            }
716
            for (k = 0; k < source_package->tracks_count; k++) {
717
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
718
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
719
                    return -1;
720
                }
721
                if (temp_track->track_id == component->source_track_id) {
722
                    source_track = temp_track;
723
                    break;
724
                }
725
            }
726
            if (!source_track) {
727
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
728
                break;
729
            }
730
        }
731
        if (!source_track)
732
            continue;
733

    
734
        st = av_new_stream(mxf->fc, source_track->track_id);
735
        if (!st) {
736
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
737
            return -1;
738
        }
739
        st->priv_data = source_track;
740
        st->duration = component->duration;
741
        if (st->duration == -1)
742
            st->duration = AV_NOPTS_VALUE;
743
        st->start_time = component->start_position;
744
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
745

    
746
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
747
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
748
            return -1;
749
        }
750

    
751
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
752
        codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
753
        st->codec->codec_type = codec_ul->id;
754

    
755
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
756
        if (source_package->descriptor) {
757
            if (source_package->descriptor->type == MultipleDescriptor) {
758
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
759
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
760

    
761
                    if (!sub_descriptor) {
762
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
763
                        continue;
764
                    }
765
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
766
                        descriptor = sub_descriptor;
767
                        break;
768
                    }
769
                }
770
            } else if (source_package->descriptor->type == Descriptor)
771
                descriptor = source_package->descriptor;
772
        }
773
        if (!descriptor) {
774
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
775
            continue;
776
        }
777
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
778
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
779
        essence_container_ul = &descriptor->essence_container_ul;
780
        /* HACK: replacing the original key with mxf_encrypted_essence_container
781
         * is not allowed according to s429-6, try to find correct information anyway */
782
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
783
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
784
            for (k = 0; k < mxf->metadata_sets_count; k++) {
785
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
786
                if (metadata->type == CryptoContext) {
787
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
788
                    break;
789
                }
790
            }
791
        }
792
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
793
        codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
794
        st->codec->codec_id = codec_ul->id;
795
        if (descriptor->extradata) {
796
            st->codec->extradata = descriptor->extradata;
797
            st->codec->extradata_size = descriptor->extradata_size;
798
        }
799
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
800
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
801
            if (st->codec->codec_id == CODEC_ID_NONE)
802
                st->codec->codec_id = container_ul->id;
803
            st->codec->width = descriptor->width;
804
            st->codec->height = descriptor->height;
805
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
806
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
807
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
808
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
809
            if (st->codec->codec_id == CODEC_ID_NONE)
810
                st->codec->codec_id = container_ul->id;
811
            st->codec->channels = descriptor->channels;
812
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
813
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
814
            /* TODO: implement CODEC_ID_RAWAUDIO */
815
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
816
                if (descriptor->bits_per_sample == 24)
817
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
818
                else if (descriptor->bits_per_sample == 32)
819
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
820
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
821
                if (descriptor->bits_per_sample == 24)
822
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
823
                else if (descriptor->bits_per_sample == 32)
824
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
825
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
826
                st->need_parsing = AVSTREAM_PARSE_FULL;
827
            }
828
        }
829
        if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
830
            av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
831
            st->need_parsing = AVSTREAM_PARSE_FULL;
832
        }
833
    }
834
    return 0;
835
}
836

    
837
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
838
    { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
839
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
840
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
841
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
842
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
843
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
844
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
845
    { { 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 */
846
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
847
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
848
    { { 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 */
849
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
850
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
851
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
852
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
853
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
854
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
855
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
856
};
857

    
858
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
859
{
860
    ByteIOContext *pb = mxf->fc->pb;
861
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
862
    uint64_t klv_end = url_ftell(pb) + klv->length;
863

    
864
    if (!ctx)
865
        return -1;
866
    while (url_ftell(pb) + 4 < klv_end) {
867
        int tag = get_be16(pb);
868
        int size = get_be16(pb); /* KLV specified by 0x53 */
869
        uint64_t next = url_ftell(pb) + size;
870
        UID uid = {0};
871

    
872
        dprintf(mxf->fc, "local tag %#04x size %d\n", tag, size);
873
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
874
            av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
875
            continue;
876
        }
877
        if (tag > 0x7FFF) { /* dynamic tag */
878
            int i;
879
            for (i = 0; i < mxf->local_tags_count; i++) {
880
                int local_tag = AV_RB16(mxf->local_tags+i*18);
881
                if (local_tag == tag) {
882
                    memcpy(uid, mxf->local_tags+i*18+2, 16);
883
                    dprintf(mxf->fc, "local tag %#04x\n", local_tag);
884
                    PRINT_KEY(mxf->fc, "uid", uid);
885
                }
886
            }
887
        }
888
        if (ctx_size && tag == 0x3C0A)
889
            get_buffer(pb, ctx->uid, 16);
890
        else if (read_child(ctx, pb, tag, size, uid) < 0)
891
            return -1;
892

    
893
        url_fseek(pb, next, SEEK_SET);
894
    }
895
    if (ctx_size) ctx->type = type;
896
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
897
}
898

    
899
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
900
{
901
    MXFContext *mxf = s->priv_data;
902
    KLVPacket klv;
903

    
904
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
905
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
906
        return -1;
907
    }
908
    url_fseek(s->pb, -14, SEEK_CUR);
909
    mxf->fc = s;
910
    while (!url_feof(s->pb)) {
911
        const MXFMetadataReadTableEntry *metadata;
912

    
913
        if (klv_read_packet(&klv, s->pb) < 0)
914
            return -1;
915
        PRINT_KEY(s, "read header", klv.key);
916
        dprintf(s, "size %lld offset %#llx\n", klv.length, klv.offset);
917
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
918
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
919
            /* FIXME avoid seek */
920
            url_fseek(s->pb, klv.offset, SEEK_SET);
921
            break;
922
        }
923

    
924
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
925
            if (IS_KLV_KEY(klv.key, metadata->key)) {
926
                int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
927
                if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
928
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
929
                    return -1;
930
                }
931
                break;
932
            }
933
        }
934
        if (!metadata->read)
935
            url_fskip(s->pb, klv.length);
936
    }
937
    return mxf_parse_structural_metadata(mxf);
938
}
939

    
940
static int mxf_read_close(AVFormatContext *s)
941
{
942
    MXFContext *mxf = s->priv_data;
943
    int i;
944

    
945
    av_freep(&mxf->packages_refs);
946

    
947
    for (i = 0; i < s->nb_streams; i++)
948
        s->streams[i]->priv_data = NULL;
949

    
950
    for (i = 0; i < mxf->metadata_sets_count; i++) {
951
        switch (mxf->metadata_sets[i]->type) {
952
        case MultipleDescriptor:
953
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
954
            break;
955
        case Sequence:
956
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
957
            break;
958
        case SourcePackage:
959
        case MaterialPackage:
960
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
961
            break;
962
        default:
963
            break;
964
        }
965
        av_freep(&mxf->metadata_sets[i]);
966
    }
967
    av_freep(&mxf->metadata_sets);
968
    av_freep(&mxf->aesc);
969
    av_freep(&mxf->local_tags);
970
    return 0;
971
}
972

    
973
static int mxf_probe(AVProbeData *p) {
974
    uint8_t *bufp = p->buf;
975
    uint8_t *end = p->buf + p->buf_size;
976

    
977
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
978
        return 0;
979

    
980
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
981
    end -= sizeof(mxf_header_partition_pack_key);
982
    for (; bufp < end; bufp++) {
983
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
984
            return AVPROBE_SCORE_MAX;
985
    }
986
    return 0;
987
}
988

    
989
/* rudimentary byte seek */
990
/* XXX: use MXF Index */
991
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
992
{
993
    AVStream *st = s->streams[stream_index];
994
    int64_t seconds;
995

    
996
    if (!s->bit_rate)
997
        return -1;
998
    if (sample_time < 0)
999
        sample_time = 0;
1000
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1001
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1002
    av_update_cur_dts(s, st, sample_time);
1003
    return 0;
1004
}
1005

    
1006
AVInputFormat mxf_demuxer = {
1007
    "mxf",
1008
    NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1009
    sizeof(MXFContext),
1010
    mxf_probe,
1011
    mxf_read_header,
1012
    mxf_read_packet,
1013
    mxf_read_close,
1014
    mxf_read_seek,
1015
};