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ffmpeg / libavformat / mxf.c @ 51169b61

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1
/*
2
 * MXF demuxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/*
23
 * References
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 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
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 * SMPTE 377M MXF File Format Specifications
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 * SMPTE 378M Operational Pattern 1a
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 * SMPTE 379M MXF Generic Container
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 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
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 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
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 *
32
 * Principle
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 * Search for Track numbers which will identify essence element KLV packets.
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 * Search for SourcePackage which define tracks which contains Track numbers.
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 * Material Package contains tracks with reference to SourcePackage tracks.
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 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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 * Assign Descriptors to correct Tracks.
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 *
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 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
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 * Metadata parsing resolves Strong References to objects.
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 *
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 * Simple demuxer, only OP1A supported and some files might not work at all.
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 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
44
 */
45

    
46
//#define DEBUG
47

    
48
#include "avformat.h"
49
#include "aes.h"
50
#include "bytestream.h"
51

    
52
typedef uint8_t UID[16];
53

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

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

    
73
typedef struct {
74
    UID uid;
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    enum MXFMetadataSetType type;
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    UID source_package_uid;
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    UID data_definition_ul;
78
    int64_t duration;
79
    int64_t start_position;
80
    int source_track_id;
81
} MXFStructuralComponent;
82

    
83
typedef struct {
84
    UID uid;
85
    enum MXFMetadataSetType type;
86
    UID data_definition_ul;
87
    UID *structural_components_refs;
88
    int structural_components_count;
89
    int64_t duration;
90
} MXFSequence;
91

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

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

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

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

    
135
typedef struct {
136
    UID *packages_refs;
137
    int packages_count;
138
    MXFMetadataSet **metadata_sets;
139
    int metadata_sets_count;
140
    AVFormatContext *fc;
141
    struct AVAES *aesc;
142
    uint8_t *local_tags;
143
    int local_tags_count;
144
} MXFContext;
145

    
146
typedef struct {
147
    UID key;
148
    offset_t offset;
149
    uint64_t length;
150
} KLVPacket;
151

    
152
enum MXFWrappingScheme {
153
    Frame,
154
    Clip,
155
};
156

    
157
typedef struct {
158
    UID uid;
159
    unsigned matching_len;
160
    enum CodecID id;
161
} MXFCodecUL;
162

    
163
typedef struct {
164
    UID uid;
165
    enum CodecType type;
166
} MXFDataDefinitionUL;
167

    
168
typedef struct {
169
    const UID key;
170
    int (*read)();
171
    int ctx_size;
172
    enum MXFMetadataSetType type;
173
} MXFMetadataReadTableEntry;
174

    
175
/* partial keys to match */
176
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
177
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
178
static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
179
/* complete keys to match */
180
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 };
181
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
182
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
183

    
184
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
185

    
186
#define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
187
                             (x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])
188

    
189
static int64_t klv_decode_ber_length(ByteIOContext *pb)
190
{
191
    uint64_t size = get_byte(pb);
192
    if (size & 0x80) { /* long form */
193
        int bytes_num = size & 0x7f;
194
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
195
        if (bytes_num > 8)
196
            return -1;
197
        size = 0;
198
        while (bytes_num--)
199
            size = size << 8 | get_byte(pb);
200
    }
201
    return size;
202
}
203

    
204
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
205
{
206
    int i, b;
207
    for (i = 0; i < size && !url_feof(pb); i++) {
208
        b = get_byte(pb);
209
        if (b == key[0])
210
            i = 0;
211
        else if (b != key[i])
212
            i = -1;
213
    }
214
    return i == size;
215
}
216

    
217
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
218
{
219
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
220
        return -1;
221
    klv->offset = url_ftell(pb) - 4;
222
    memcpy(klv->key, mxf_klv_key, 4);
223
    get_buffer(pb, klv->key + 4, 12);
224
    klv->length = klv_decode_ber_length(pb);
225
    return klv->length == -1 ? -1 : 0;
226
}
227

    
228
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
229
{
230
    int i;
231

    
232
    for (i = 0; i < s->nb_streams; i++) {
233
        MXFTrack *track = s->streams[i]->priv_data;
234
        /* SMPTE 379M 7.3 */
235
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
236
            return i;
237
    }
238
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
239
    return s->nb_streams == 1 ? 0 : -1;
240
}
241

    
242
/* XXX: use AVBitStreamFilter */
243
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
244
{
245
    uint8_t buffer[61444];
246
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
247
    int i;
248

    
249
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
250
        return -1;
251
    get_buffer(pb, buffer, length);
252
    av_new_packet(pkt, length);
253
    data_ptr = pkt->data;
254
    end_ptr = buffer + length;
255
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
256
    for (; buf_ptr < end_ptr; ) {
257
        for (i = 0; i < st->codec->channels; i++) {
258
            uint32_t sample = bytestream_get_le32(&buf_ptr);
259
            if (st->codec->bits_per_sample == 24)
260
                bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
261
            else
262
                bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
263
        }
264
        buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
265
    }
266
    pkt->size = data_ptr - pkt->data;
267
    return 0;
268
}
269

    
270
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
271
{
272
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
273
    MXFContext *mxf = s->priv_data;
274
    ByteIOContext *pb = s->pb;
275
    offset_t end = url_ftell(pb) + klv->length;
276
    uint64_t size;
277
    uint64_t orig_size;
278
    uint64_t plaintext_size;
279
    uint8_t ivec[16];
280
    uint8_t tmpbuf[16];
281
    int index;
282

    
283
    if (!mxf->aesc && s->key && s->keylen == 16) {
284
        mxf->aesc = av_malloc(av_aes_size);
285
        if (!mxf->aesc)
286
            return -1;
287
        av_aes_init(mxf->aesc, s->key, 128, 1);
288
    }
289
    // crypto context
290
    url_fskip(pb, klv_decode_ber_length(pb));
291
    // plaintext offset
292
    klv_decode_ber_length(pb);
293
    plaintext_size = get_be64(pb);
294
    // source klv key
295
    klv_decode_ber_length(pb);
296
    get_buffer(pb, klv->key, 16);
297
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
298
        return -1;
299
    index = mxf_get_stream_index(s, klv);
300
    if (index < 0)
301
        return -1;
302
    // source size
303
    klv_decode_ber_length(pb);
304
    orig_size = get_be64(pb);
305
    if (orig_size < plaintext_size)
306
        return -1;
307
    // enc. code
308
    size = klv_decode_ber_length(pb);
309
    if (size < 32 || size - 32 < orig_size)
310
        return -1;
311
    get_buffer(pb, ivec, 16);
312
    get_buffer(pb, tmpbuf, 16);
313
    if (mxf->aesc)
314
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
315
    if (memcmp(tmpbuf, checkv, 16))
316
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
317
    size -= 32;
318
    av_get_packet(pb, pkt, size);
319
    size -= plaintext_size;
320
    if (mxf->aesc)
321
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
322
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
323
    pkt->size = orig_size;
324
    pkt->stream_index = index;
325
    url_fskip(pb, end - url_ftell(pb));
326
    return 0;
327
}
328

    
329
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
330
{
331
    KLVPacket klv;
332

    
333
    while (!url_feof(s->pb)) {
334
        if (klv_read_packet(&klv, s->pb) < 0)
335
            return -1;
336
#ifdef DEBUG
337
        PRINT_KEY(s, "read packet", klv.key);
338
#endif
339
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
340
            int res = mxf_decrypt_triplet(s, pkt, &klv);
341
            if (res < 0) {
342
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
343
                return -1;
344
            }
345
            return 0;
346
        }
347
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
348
            int index = mxf_get_stream_index(s, &klv);
349
            if (index < 0) {
350
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
351
                url_fskip(s->pb, klv.length);
352
                return -1;
353
            }
354
            /* check for 8 channels AES3 element */
355
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
356
                if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
357
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
358
                    return -1;
359
                }
360
            } else
361
                av_get_packet(s->pb, pkt, klv.length);
362
            pkt->stream_index = index;
363
            pkt->pos = klv.offset;
364
            return 0;
365
        } else
366
            url_fskip(s->pb, klv.length);
367
    }
368
    return AVERROR(EIO);
369
}
370

    
371
static int mxf_read_primer_pack(MXFContext *mxf)
372
{
373
    ByteIOContext *pb = mxf->fc->pb;
374
    int item_num = get_be32(pb);
375
    int item_len = get_be32(pb);
376

    
377
    if (item_len != 18) {
378
        av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
379
        return -1;
380
    }
381
    if (item_num > UINT_MAX / item_len)
382
        return -1;
383
    mxf->local_tags_count = item_num;
384
    mxf->local_tags = av_malloc(item_num*item_len);
385
    if (!mxf->local_tags)
386
        return -1;
387
    get_buffer(pb, mxf->local_tags, item_num*item_len);
388
    return 0;
389
}
390

    
391
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
392
{
393
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
394
    if (!mxf->metadata_sets)
395
        return -1;
396
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
397
    mxf->metadata_sets_count++;
398
    return 0;
399
}
400

    
401
static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
402
{
403
    if (size != 16)
404
        return -1;
405
    if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
406
        get_buffer(pb, cryptocontext->source_container_ul, 16);
407
    return 0;
408
}
409

    
410
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
411
{
412
    switch (tag) {
413
    case 0x1901:
414
        mxf->packages_count = get_be32(pb);
415
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
416
            return -1;
417
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
418
        if (!mxf->packages_refs)
419
            return -1;
420
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
421
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
422
        break;
423
    }
424
    return 0;
425
}
426

    
427
static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
428
{
429
    switch(tag) {
430
    case 0x0202:
431
        source_clip->duration = get_be64(pb);
432
        break;
433
    case 0x1201:
434
        source_clip->start_position = get_be64(pb);
435
        break;
436
    case 0x1101:
437
        /* UMID, only get last 16 bytes */
438
        url_fskip(pb, 16);
439
        get_buffer(pb, source_clip->source_package_uid, 16);
440
        break;
441
    case 0x1102:
442
        source_clip->source_track_id = get_be32(pb);
443
        break;
444
    }
445
    return 0;
446
}
447

    
448
static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
449
{
450
    switch(tag) {
451
    case 0x4403:
452
        package->tracks_count = get_be32(pb);
453
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
454
            return -1;
455
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
456
        if (!package->tracks_refs)
457
            return -1;
458
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
459
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
460
        break;
461
    }
462
    return 0;
463
}
464

    
465
static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
466
{
467
    switch(tag) {
468
    case 0x4801:
469
        track->track_id = get_be32(pb);
470
        break;
471
    case 0x4804:
472
        get_buffer(pb, track->track_number, 4);
473
        break;
474
    case 0x4B01:
475
        track->edit_rate.den = get_be32(pb);
476
        track->edit_rate.num = get_be32(pb);
477
        break;
478
    case 0x4803:
479
        get_buffer(pb, track->sequence_ref, 16);
480
        break;
481
    }
482
    return 0;
483
}
484

    
485
static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
486
{
487
    switch(tag) {
488
    case 0x0202:
489
        sequence->duration = get_be64(pb);
490
        break;
491
    case 0x0201:
492
        get_buffer(pb, sequence->data_definition_ul, 16);
493
        break;
494
    case 0x1001:
495
        sequence->structural_components_count = get_be32(pb);
496
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
497
            return -1;
498
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
499
        if (!sequence->structural_components_refs)
500
            return -1;
501
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
502
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
503
        break;
504
    }
505
    return 0;
506
}
507

    
508
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
509
{
510
    switch(tag) {
511
    case 0x4403:
512
        package->tracks_count = get_be32(pb);
513
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
514
            return -1;
515
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
516
        if (!package->tracks_refs)
517
            return -1;
518
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
519
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
520
        break;
521
    case 0x4401:
522
        /* UMID, only get last 16 bytes */
523
        url_fskip(pb, 16);
524
        get_buffer(pb, package->package_uid, 16);
525
        break;
526
    case 0x4701:
527
        get_buffer(pb, package->descriptor_ref, 16);
528
        break;
529
    }
530
    return 0;
531
}
532

    
533
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
534
{
535
    int code;
536

    
537
    do {
538
        code = get_byte(pb);
539
        dprintf(NULL, "pixel layout: code 0x%x\n", code);
540
        switch (code) {
541
        case 0x52: /* R */
542
            descriptor->bits_per_sample += get_byte(pb);
543
            break;
544
        case 0x47: /* G */
545
            descriptor->bits_per_sample += get_byte(pb);
546
            break;
547
        case 0x42: /* B */
548
            descriptor->bits_per_sample += get_byte(pb);
549
            break;
550
        default:
551
            get_byte(pb);
552
        }
553
    } while (code != 0); /* SMPTE 377M E.2.46 */
554
}
555

    
556
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
557
{
558
    switch(tag) {
559
    case 0x3F01:
560
        descriptor->sub_descriptors_count = get_be32(pb);
561
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
562
            return -1;
563
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
564
        if (!descriptor->sub_descriptors_refs)
565
            return -1;
566
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
567
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
568
        break;
569
    case 0x3004:
570
        get_buffer(pb, descriptor->essence_container_ul, 16);
571
        break;
572
    case 0x3006:
573
        descriptor->linked_track_id = get_be32(pb);
574
        break;
575
    case 0x3201: /* PictureEssenceCoding */
576
        get_buffer(pb, descriptor->essence_codec_ul, 16);
577
        break;
578
    case 0x3203:
579
        descriptor->width = get_be32(pb);
580
        break;
581
    case 0x3202:
582
        descriptor->height = get_be32(pb);
583
        break;
584
    case 0x320E:
585
        descriptor->aspect_ratio.num = get_be32(pb);
586
        descriptor->aspect_ratio.den = get_be32(pb);
587
        break;
588
    case 0x3D03:
589
        descriptor->sample_rate.num = get_be32(pb);
590
        descriptor->sample_rate.den = get_be32(pb);
591
        break;
592
    case 0x3D06: /* SoundEssenceCompression */
593
        get_buffer(pb, descriptor->essence_codec_ul, 16);
594
        break;
595
    case 0x3D07:
596
        descriptor->channels = get_be32(pb);
597
        break;
598
    case 0x3D01:
599
        descriptor->bits_per_sample = get_be32(pb);
600
        break;
601
    case 0x3401:
602
        mxf_read_pixel_layout(pb, descriptor);
603
        break;
604
    case 0x8201: /* Private tag used by SONY C0023S01.mxf */
605
        descriptor->extradata = av_malloc(size);
606
        if (!descriptor->extradata)
607
            return -1;
608
        descriptor->extradata_size = size;
609
        get_buffer(pb, descriptor->extradata, size);
610
        break;
611
    }
612
    return 0;
613
}
614

    
615
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
616
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
617
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
618
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
619
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
620
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
621
};
622

    
623
static const MXFCodecUL mxf_codec_uls[] = {
624
    /* PictureEssenceCoding */
625
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP@ML Long GoP */
626
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* D-10 50Mbps PAL */
627
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP@HL Long GoP */
628
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* 422P@HL I-Frame */
629
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, 14,      CODEC_ID_MPEG4 }, /* XDCAM proxy_pal030926.mxf */
630
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, 13,    CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
631
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14,   CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
632
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13,   CODEC_ID_RAWVIDEO }, /* Uncompressed */
633
    /* SoundEssenceCompression */
634
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13,  CODEC_ID_PCM_S16LE }, /* Uncompressed */
635
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13,  CODEC_ID_PCM_S16LE },
636
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, 13,  CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
637
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, 15,   CODEC_ID_PCM_ALAW }, /* XDCAM Proxy C0023S01.mxf */
638
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 }, 15,        CODEC_ID_AC3 },
639
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 }, 15,        CODEC_ID_MP2 }, /* MP2 or MP3 */
640
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 }, 15,    CODEC_ID_DOLBY_E }, /* Dolby-E */
641
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,       CODEC_ID_NONE },
642
};
643

    
644
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
645
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 16, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
646
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, 16, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
647
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, 16, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
648
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 16,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
649
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x3F,0x01 }, 16,    CODEC_ID_DVVIDEO }, /* DV IEC 625 25mbps */
650
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 16,       CODEC_ID_NONE },
651
};
652

    
653
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
654
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 16, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
655
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 }, 16, CODEC_ID_PCM_S16LE }, /* AES Frame wrapped */
656
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 16,       CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
657
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 }, 16,       CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
658
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 }, 16,       CODEC_ID_MP2 }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
659
    { { 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 */
660
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE },
661
};
662

    
663
/*
664
 * Match an uid independently of the version byte and up to len common bytes
665
 * Returns: boolean
666
 */
667
static int mxf_match_uid(const UID key, const UID uid, int len)
668
{
669
    int i;
670
    for (i = 0; i < len; i++) {
671
        if (i != 7 && key[i] != uid[i])
672
            return 0;
673
    }
674
    return 1;
675
}
676

    
677
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
678
{
679
    while (uls->id != CODEC_ID_NONE) {
680
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
681
            break;
682
        uls++;
683
    }
684
    return uls;
685
}
686

    
687
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
688
{
689
    while (uls->type != CODEC_TYPE_DATA) {
690
        if(mxf_match_uid(uls->uid, *uid, 16))
691
            break;
692
        uls++;
693
    }
694
    return uls->type;
695
}
696

    
697
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
698
{
699
    int i;
700

    
701
    if (!strong_ref)
702
        return NULL;
703
    for (i = 0; i < mxf->metadata_sets_count; i++) {
704
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
705
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
706
            return mxf->metadata_sets[i];
707
        }
708
    }
709
    return NULL;
710
}
711

    
712
static int mxf_parse_structural_metadata(MXFContext *mxf)
713
{
714
    MXFPackage *material_package = NULL;
715
    MXFPackage *temp_package = NULL;
716
    int i, j, k;
717

    
718
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
719
    /* TODO: handle multiple material packages (OP3x) */
720
    for (i = 0; i < mxf->packages_count; i++) {
721
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
722
        if (material_package) break;
723
    }
724
    if (!material_package) {
725
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
726
        return -1;
727
    }
728

    
729
    for (i = 0; i < material_package->tracks_count; i++) {
730
        MXFPackage *source_package = NULL;
731
        MXFTrack *material_track = NULL;
732
        MXFTrack *source_track = NULL;
733
        MXFTrack *temp_track = NULL;
734
        MXFDescriptor *descriptor = NULL;
735
        MXFStructuralComponent *component = NULL;
736
        UID *essence_container_ul = NULL;
737
        const MXFCodecUL *codec_ul = NULL;
738
        const MXFCodecUL *container_ul = NULL;
739
        AVStream *st;
740

    
741
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
742
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
743
            continue;
744
        }
745

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

    
751
        /* TODO: handle multiple source clips */
752
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
753
            /* TODO: handle timecode component */
754
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
755
            if (!component)
756
                continue;
757

    
758
            for (k = 0; k < mxf->packages_count; k++) {
759
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
760
                if (!temp_package)
761
                    continue;
762
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
763
                    source_package = temp_package;
764
                    break;
765
                }
766
            }
767
            if (!source_package) {
768
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
769
                break;
770
            }
771
            for (k = 0; k < source_package->tracks_count; k++) {
772
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
773
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
774
                    return -1;
775
                }
776
                if (temp_track->track_id == component->source_track_id) {
777
                    source_track = temp_track;
778
                    break;
779
                }
780
            }
781
            if (!source_track) {
782
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
783
                break;
784
            }
785
        }
786
        if (!source_track)
787
            continue;
788

    
789
        st = av_new_stream(mxf->fc, source_track->track_id);
790
        if (!st) {
791
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
792
            return -1;
793
        }
794
        st->priv_data = source_track;
795
        st->duration = component->duration;
796
        if (st->duration == -1)
797
            st->duration = AV_NOPTS_VALUE;
798
        st->start_time = component->start_position;
799
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
800

    
801
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
802
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
803
            return -1;
804
        }
805

    
806
#ifdef DEBUG
807
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
808
#endif
809
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
810

    
811
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
812
        if (source_package->descriptor) {
813
            if (source_package->descriptor->type == MultipleDescriptor) {
814
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
815
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
816

    
817
                    if (!sub_descriptor) {
818
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
819
                        continue;
820
                    }
821
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
822
                        descriptor = sub_descriptor;
823
                        break;
824
                    }
825
                }
826
            } else if (source_package->descriptor->type == Descriptor)
827
                descriptor = source_package->descriptor;
828
        }
829
        if (!descriptor) {
830
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
831
            continue;
832
        }
833
#ifdef DEBUG
834
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
835
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
836
#endif
837
        essence_container_ul = &descriptor->essence_container_ul;
838
        /* HACK: replacing the original key with mxf_encrypted_essence_container
839
         * is not allowed according to s429-6, try to find correct information anyway */
840
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
841
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
842
            for (k = 0; k < mxf->metadata_sets_count; k++) {
843
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
844
                if (metadata->type == CryptoContext) {
845
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
846
                    break;
847
                }
848
            }
849
        }
850
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
851
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
852
        st->codec->codec_id = codec_ul->id;
853
        if (descriptor->extradata) {
854
            st->codec->extradata = descriptor->extradata;
855
            st->codec->extradata_size = descriptor->extradata_size;
856
        }
857
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
858
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
859
            if (st->codec->codec_id == CODEC_ID_NONE)
860
                st->codec->codec_id = container_ul->id;
861
            st->codec->width = descriptor->width;
862
            st->codec->height = descriptor->height;
863
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
864
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
865
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
866
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
867
            if (st->codec->codec_id == CODEC_ID_NONE)
868
                st->codec->codec_id = container_ul->id;
869
            st->codec->channels = descriptor->channels;
870
            st->codec->bits_per_sample = descriptor->bits_per_sample;
871
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
872
            /* TODO: implement CODEC_ID_RAWAUDIO */
873
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
874
                if (descriptor->bits_per_sample == 24)
875
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
876
                else if (descriptor->bits_per_sample == 32)
877
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
878
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
879
                if (descriptor->bits_per_sample == 24)
880
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
881
                else if (descriptor->bits_per_sample == 32)
882
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
883
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
884
                st->need_parsing = AVSTREAM_PARSE_FULL;
885
            }
886
        }
887
        if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
888
            av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
889
            st->need_parsing = AVSTREAM_PARSE_FULL;
890
        }
891
    }
892
    return 0;
893
}
894

    
895
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
896
    { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
897
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
898
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
899
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
900
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
901
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
902
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
903
    { { 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 */
904
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
905
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
906
    { { 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 */
907
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
908
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
909
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
910
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
911
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
912
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
913
};
914

    
915
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
916
{
917
    ByteIOContext *pb = mxf->fc->pb;
918
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
919
    uint64_t klv_end = url_ftell(pb) + klv->length;
920

    
921
    if (!ctx)
922
        return -1;
923
    while (url_ftell(pb) + 4 < klv_end) {
924
        int tag = get_be16(pb);
925
        int size = get_be16(pb); /* KLV specified by 0x53 */
926
        uint64_t next = url_ftell(pb) + size;
927
        UID uid;
928

    
929
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
930
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
931
            continue;
932
        }
933
        if (tag > 0x7FFF) { /* dynamic tag */
934
            int i;
935
            for (i = 0; i < mxf->local_tags_count; i++) {
936
                int local_tag = AV_RB16(mxf->local_tags+i*18);
937
                if (local_tag == tag) {
938
                    memcpy(uid, mxf->local_tags+i*18+2, 16);
939
                    dprintf(mxf->fc, "local tag 0x%04X\n", local_tag);
940
#ifdef DEBUG
941
                    PRINT_KEY(mxf->fc, "uid", uid);
942
#endif
943
                }
944
            }
945
        }
946
        if (ctx_size && tag == 0x3C0A)
947
            get_buffer(pb, ctx->uid, 16);
948
        else
949
            read_child(ctx, pb, tag, size, uid);
950

    
951
        url_fseek(pb, next, SEEK_SET);
952
    }
953
    if (ctx_size) ctx->type = type;
954
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
955
}
956

    
957
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
958
{
959
    MXFContext *mxf = s->priv_data;
960
    KLVPacket klv;
961

    
962
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
963
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
964
        return -1;
965
    }
966
    url_fseek(s->pb, -14, SEEK_CUR);
967
    mxf->fc = s;
968
    while (!url_feof(s->pb)) {
969
        const MXFMetadataReadTableEntry *metadata;
970

    
971
        if (klv_read_packet(&klv, s->pb) < 0)
972
            return -1;
973
#ifdef DEBUG
974
        PRINT_KEY(s, "read header", klv.key);
975
#endif
976
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
977
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
978
            /* FIXME avoid seek */
979
            url_fseek(s->pb, klv.offset, SEEK_SET);
980
            break;
981
        }
982

    
983
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
984
            if (IS_KLV_KEY(klv.key, metadata->key)) {
985
                int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
986
                if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
987
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
988
                    return -1;
989
                }
990
                break;
991
            }
992
        }
993
        if (!metadata->read)
994
            url_fskip(s->pb, klv.length);
995
    }
996
    return mxf_parse_structural_metadata(mxf);
997
}
998

    
999
static int mxf_read_close(AVFormatContext *s)
1000
{
1001
    MXFContext *mxf = s->priv_data;
1002
    int i;
1003

    
1004
    av_freep(&mxf->packages_refs);
1005
    for (i = 0; i < mxf->metadata_sets_count; i++) {
1006
        switch (mxf->metadata_sets[i]->type) {
1007
        case MultipleDescriptor:
1008
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1009
            break;
1010
        case Sequence:
1011
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1012
            break;
1013
        case SourcePackage:
1014
        case MaterialPackage:
1015
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1016
            break;
1017
        default:
1018
            break;
1019
        }
1020
        av_freep(&mxf->metadata_sets[i]);
1021
    }
1022
    av_freep(&mxf->metadata_sets);
1023
    av_freep(&mxf->aesc);
1024
    av_freep(&mxf->local_tags);
1025
    return 0;
1026
}
1027

    
1028
static int mxf_probe(AVProbeData *p) {
1029
    uint8_t *bufp = p->buf;
1030
    uint8_t *end = p->buf + p->buf_size;
1031

    
1032
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1033
        return 0;
1034

    
1035
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1036
    end -= sizeof(mxf_header_partition_pack_key);
1037
    for (; bufp < end; bufp++) {
1038
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1039
            return AVPROBE_SCORE_MAX;
1040
    }
1041
    return 0;
1042
}
1043

    
1044
/* rudimentary byte seek */
1045
/* XXX: use MXF Index */
1046
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1047
{
1048
    AVStream *st = s->streams[stream_index];
1049
    int64_t seconds;
1050

    
1051
    if (!s->bit_rate)
1052
        return -1;
1053
    if (sample_time < 0)
1054
        sample_time = 0;
1055
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1056
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1057
    av_update_cur_dts(s, st, sample_time);
1058
    return 0;
1059
}
1060

    
1061
AVInputFormat mxf_demuxer = {
1062
    "mxf",
1063
    "MXF format",
1064
    sizeof(MXFContext),
1065
    mxf_probe,
1066
    mxf_read_header,
1067
    mxf_read_packet,
1068
    mxf_read_close,
1069
    mxf_read_seek,
1070
};