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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
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/*
23
 * References
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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
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 * 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,
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    SourceClip,
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    TimecodeComponent,
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    Sequence,
61
    MultipleDescriptor,
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    Descriptor,
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    Track,
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    CryptoContext,
65
};
66

    
67
typedef struct {
68
    UID uid;
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    enum MXFMetadataSetType type;
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    UID context_uid;
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    UID source_container_ul;
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} MXFCryptoContext;
73

    
74
typedef struct {
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    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;
79
    int64_t duration;
80
    int64_t start_position;
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    int source_track_id;
82
} MXFStructuralComponent;
83

    
84
typedef struct {
85
    UID uid;
86
    enum MXFMetadataSetType type;
87
    UID data_definition_ul;
88
    UID *structural_components_refs;
89
    int structural_components_count;
90
    int64_t duration;
91
} MXFSequence;
92

    
93
typedef struct {
94
    UID uid;
95
    enum MXFMetadataSetType type;
96
    MXFSequence *sequence; /* mandatory, and only one */
97
    UID sequence_ref;
98
    int track_id;
99
    uint8_t track_number[4];
100
    AVRational edit_rate;
101
} MXFTrack;
102

    
103
typedef struct {
104
    UID uid;
105
    enum MXFMetadataSetType type;
106
    UID essence_container_ul;
107
    UID essence_codec_ul;
108
    AVRational sample_rate;
109
    AVRational aspect_ratio;
110
    int width;
111
    int height;
112
    int channels;
113
    int bits_per_sample;
114
    UID *sub_descriptors_refs;
115
    int sub_descriptors_count;
116
    int linked_track_id;
117
    uint8_t *extradata;
118
    int extradata_size;
119
} MXFDescriptor;
120

    
121
typedef struct {
122
    UID uid;
123
    enum MXFMetadataSetType type;
124
    UID package_uid;
125
    UID *tracks_refs;
126
    int tracks_count;
127
    MXFDescriptor *descriptor; /* only one */
128
    UID descriptor_ref;
129
} MXFPackage;
130

    
131
typedef struct {
132
    UID uid;
133
    enum MXFMetadataSetType type;
134
} MXFMetadataSet;
135

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

    
145
typedef struct {
146
    UID key;
147
    offset_t offset;
148
    uint64_t length;
149
} KLVPacket;
150

    
151
enum MXFWrappingScheme {
152
    Frame,
153
    Clip,
154
};
155

    
156
typedef struct {
157
    UID uid;
158
    unsigned matching_len;
159
    enum CodecID id;
160
    enum MXFWrappingScheme wrapping;
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_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
181
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
182

    
183
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
184

    
185
#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, \
186
                             (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])
187

    
188
static int64_t klv_decode_ber_length(ByteIOContext *pb)
189
{
190
    uint64_t size = get_byte(pb);
191
    if (size & 0x80) { /* long form */
192
        int bytes_num = size & 0x7f;
193
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
194
        if (bytes_num > 8)
195
            return -1;
196
        size = 0;
197
        while (bytes_num--)
198
            size = size << 8 | get_byte(pb);
199
    }
200
    return size;
201
}
202

    
203
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
204
{
205
    int i, b;
206
    for (i = 0; i < size && !url_feof(pb); i++) {
207
        b = get_byte(pb);
208
        if (b == key[0])
209
            i = 0;
210
        else if (b != key[i])
211
            i = -1;
212
    }
213
    return i == size;
214
}
215

    
216
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
217
{
218
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
219
        return -1;
220
    klv->offset = url_ftell(pb) - 4;
221
    memcpy(klv->key, mxf_klv_key, 4);
222
    get_buffer(pb, klv->key + 4, 12);
223
    klv->length = klv_decode_ber_length(pb);
224
    return klv->length == -1 ? -1 : 0;
225
}
226

    
227
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
228
{
229
    int i;
230

    
231
    for (i = 0; i < s->nb_streams; i++) {
232
        MXFTrack *track = s->streams[i]->priv_data;
233
        /* SMPTE 379M 7.3 */
234
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
235
            return i;
236
    }
237
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
238
    return s->nb_streams == 1 ? 0 : -1;
239
}
240

    
241
/* XXX: use AVBitStreamFilter */
242
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
243
{
244
    uint8_t buffer[61444];
245
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
246
    int i;
247

    
248
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
249
        return -1;
250
    get_buffer(pb, buffer, length);
251
    av_new_packet(pkt, length);
252
    data_ptr = pkt->data;
253
    end_ptr = buffer + length;
254
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
255
    for (; buf_ptr < end_ptr; ) {
256
        for (i = 0; i < st->codec->channels; i++) {
257
            uint32_t sample = bytestream_get_le32(&buf_ptr);
258
            if (st->codec->bits_per_sample == 24)
259
                bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
260
            else
261
                bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
262
        }
263
        buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
264
    }
265
    pkt->size = data_ptr - pkt->data;
266
    return 0;
267
}
268

    
269
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
270
{
271
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
272
    MXFContext *mxf = s->priv_data;
273
    ByteIOContext *pb = s->pb;
274
    offset_t end = url_ftell(pb) + klv->length;
275
    uint64_t size;
276
    uint64_t orig_size;
277
    uint64_t plaintext_size;
278
    uint8_t ivec[16];
279
    uint8_t tmpbuf[16];
280
    int index;
281

    
282
    if (!mxf->aesc && s->key && s->keylen == 16) {
283
        mxf->aesc = av_malloc(av_aes_size);
284
        av_aes_init(mxf->aesc, s->key, 128, 1);
285
    }
286
    // crypto context
287
    url_fskip(pb, klv_decode_ber_length(pb));
288
    // plaintext offset
289
    klv_decode_ber_length(pb);
290
    plaintext_size = get_be64(pb);
291
    // source klv key
292
    klv_decode_ber_length(pb);
293
    get_buffer(pb, klv->key, 16);
294
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
295
        return -1;
296
    index = mxf_get_stream_index(s, klv);
297
    if (index < 0)
298
        return -1;
299
    // source size
300
    klv_decode_ber_length(pb);
301
    orig_size = get_be64(pb);
302
    if (orig_size < plaintext_size)
303
        return -1;
304
    // enc. code
305
    size = klv_decode_ber_length(pb);
306
    if (size < 32 || size - 32 < orig_size)
307
        return -1;
308
    get_buffer(pb, ivec, 16);
309
    get_buffer(pb, tmpbuf, 16);
310
    if (mxf->aesc)
311
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
312
    if (memcmp(tmpbuf, checkv, 16))
313
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
314
    size -= 32;
315
    av_get_packet(pb, pkt, size);
316
    size -= plaintext_size;
317
    if (mxf->aesc)
318
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
319
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
320
    pkt->size = orig_size;
321
    pkt->stream_index = index;
322
    url_fskip(pb, end - url_ftell(pb));
323
    return 0;
324
}
325

    
326
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
327
{
328
    KLVPacket klv;
329

    
330
    while (!url_feof(s->pb)) {
331
        if (klv_read_packet(&klv, s->pb) < 0)
332
            return -1;
333
#ifdef DEBUG
334
        PRINT_KEY(s, "read packet", klv.key);
335
#endif
336
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
337
            int res = mxf_decrypt_triplet(s, pkt, &klv);
338
            if (res < 0) {
339
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
340
                return -1;
341
            }
342
            return 0;
343
        }
344
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
345
            int index = mxf_get_stream_index(s, &klv);
346
            if (index < 0) {
347
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
348
                url_fskip(s->pb, klv.length);
349
                return -1;
350
            }
351
            /* check for 8 channels AES3 element */
352
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
353
                if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
354
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
355
                    return -1;
356
                }
357
            } else
358
                av_get_packet(s->pb, pkt, klv.length);
359
            pkt->stream_index = index;
360
            pkt->pos = klv.offset;
361
            return 0;
362
        } else
363
            url_fskip(s->pb, klv.length);
364
    }
365
    return AVERROR(EIO);
366
}
367

    
368
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
369
{
370
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
371
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
372
    mxf->metadata_sets_count++;
373
    return 0;
374
}
375

    
376
static int mxf_read_metadata_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag)
377
{
378
    switch(tag) {
379
    case 0xFFFE:
380
        get_buffer(pb, cryptocontext->context_uid, 16);
381
        break;
382
    case 0xFFFD:
383
        get_buffer(pb, cryptocontext->source_container_ul, 16);
384
        break;
385
    }
386
    return 0;
387
}
388

    
389
static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
390
{
391
    switch (tag) {
392
    case 0x1901:
393
        mxf->packages_count = get_be32(pb);
394
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
395
            return -1;
396
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
397
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
398
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
399
        break;
400
    }
401
    return 0;
402
}
403

    
404
static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
405
{
406
    switch(tag) {
407
    case 0x0202:
408
        source_clip->duration = get_be64(pb);
409
        break;
410
    case 0x1201:
411
        source_clip->start_position = get_be64(pb);
412
        break;
413
    case 0x1101:
414
        /* UMID, only get last 16 bytes */
415
        url_fskip(pb, 16);
416
        get_buffer(pb, source_clip->source_package_uid, 16);
417
        break;
418
    case 0x1102:
419
        source_clip->source_track_id = get_be32(pb);
420
        break;
421
    }
422
    return 0;
423
}
424

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

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

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

    
481
static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
482
{
483
    switch(tag) {
484
    case 0x4403:
485
        package->tracks_count = get_be32(pb);
486
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
487
            return -1;
488
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
489
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
490
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
491
        break;
492
    case 0x4401:
493
        /* UMID, only get last 16 bytes */
494
        url_fskip(pb, 16);
495
        get_buffer(pb, package->package_uid, 16);
496
        break;
497
    case 0x4701:
498
        get_buffer(pb, package->descriptor_ref, 16);
499
        break;
500
    }
501
    return 0;
502
}
503

    
504
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
505
{
506
    int code;
507

    
508
    do {
509
        code = get_byte(pb);
510
        dprintf(NULL, "pixel layout: code 0x%x\n", code);
511
        switch (code) {
512
        case 0x52: /* R */
513
            descriptor->bits_per_sample += get_byte(pb);
514
            break;
515
        case 0x47: /* G */
516
            descriptor->bits_per_sample += get_byte(pb);
517
            break;
518
        case 0x42: /* B */
519
            descriptor->bits_per_sample += get_byte(pb);
520
            break;
521
        default:
522
            get_byte(pb);
523
        }
524
    } while (code != 0); /* SMPTE 377M E.2.46 */
525
}
526

    
527
static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
528
{
529
    switch(tag) {
530
    case 0x3F01:
531
        descriptor->sub_descriptors_count = get_be32(pb);
532
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
533
            return -1;
534
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
535
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
536
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
537
        break;
538
    case 0x3004:
539
        get_buffer(pb, descriptor->essence_container_ul, 16);
540
        break;
541
    case 0x3006:
542
        descriptor->linked_track_id = get_be32(pb);
543
        break;
544
    case 0x3201: /* PictureEssenceCoding */
545
        get_buffer(pb, descriptor->essence_codec_ul, 16);
546
        break;
547
    case 0x3203:
548
        descriptor->width = get_be32(pb);
549
        break;
550
    case 0x3202:
551
        descriptor->height = get_be32(pb);
552
        break;
553
    case 0x320E:
554
        descriptor->aspect_ratio.num = get_be32(pb);
555
        descriptor->aspect_ratio.den = get_be32(pb);
556
        break;
557
    case 0x3D03:
558
        descriptor->sample_rate.num = get_be32(pb);
559
        descriptor->sample_rate.den = get_be32(pb);
560
        break;
561
    case 0x3D06: /* SoundEssenceCompression */
562
        get_buffer(pb, descriptor->essence_codec_ul, 16);
563
        break;
564
    case 0x3D07:
565
        descriptor->channels = get_be32(pb);
566
        break;
567
    case 0x3D01:
568
        descriptor->bits_per_sample = get_be32(pb);
569
        break;
570
    case 0x3401:
571
        mxf_read_metadata_pixel_layout(pb, descriptor);
572
        break;
573
    case 0x8201: /* Private tag used by SONY C0023S01.mxf */
574
        descriptor->extradata = av_malloc(size);
575
        descriptor->extradata_size = size;
576
        get_buffer(pb, descriptor->extradata, size);
577
        break;
578
    }
579
    return 0;
580
}
581

    
582
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
583
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
584
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
585
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
586
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
587
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
588
};
589

    
590
static const MXFCodecUL mxf_codec_uls[] = {
591
    /* PictureEssenceCoding */
592
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, 14, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
593
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, 14, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
594
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, 14, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
595
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, 14, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
596
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, 14,      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
597
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, 13,    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
598
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14,   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
599
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13,   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
600
    /* SoundEssenceCompression */
601
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
602
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE, Frame },
603
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
604
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, 15,  CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */
605
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 }, 15,       CODEC_ID_AC3, Frame },
606
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 }, 15,       CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
607
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 }, 15,   CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
608
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE, Frame },
609
};
610

    
611
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
612
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 16, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
613
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, 16, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
614
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, 16, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
615
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 16,    CODEC_ID_DVVIDEO, Frame }, /* DV 625 25mbps */
616
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x3F,0x01 }, 16,    CODEC_ID_DVVIDEO, Frame }, /* DV IEC 625 25mbps */
617
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 16,       CODEC_ID_NONE, Frame },
618
};
619

    
620
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
621
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 16, CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
622
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 }, 16, CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
623
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 16,       CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
624
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 }, 16,       CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
625
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 }, 16,       CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
626
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */
627
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE, Frame },
628
};
629

    
630
/*
631
 * Match an uid independently of the version byte and up to len common bytes
632
 * Returns: boolean
633
 */
634
static int mxf_match_uid(const UID key, const UID uid, int len)
635
{
636
    int i;
637
    for (i = 0; i < len; i++) {
638
        if (i != 7 && key[i] != uid[i])
639
            return 0;
640
    }
641
    return 1;
642
}
643

    
644
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
645
{
646
    while (uls->id != CODEC_ID_NONE) {
647
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
648
            break;
649
        uls++;
650
    }
651
    return uls;
652
}
653

    
654
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
655
{
656
    while (uls->type != CODEC_TYPE_DATA) {
657
        if(mxf_match_uid(uls->uid, *uid, 16))
658
            break;
659
        uls++;
660
    }
661
    return uls->type;
662
}
663

    
664
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
665
{
666
    int i;
667

    
668
    if (!strong_ref)
669
        return NULL;
670
    for (i = 0; i < mxf->metadata_sets_count; i++) {
671
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
672
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
673
            return mxf->metadata_sets[i];
674
        }
675
    }
676
    return NULL;
677
}
678

    
679
static int mxf_parse_structural_metadata(MXFContext *mxf)
680
{
681
    MXFPackage *material_package = NULL;
682
    MXFPackage *temp_package = NULL;
683
    int i, j, k;
684

    
685
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
686
    /* TODO: handle multiple material packages (OP3x) */
687
    for (i = 0; i < mxf->packages_count; i++) {
688
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
689
        if (material_package) break;
690
    }
691
    if (!material_package) {
692
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
693
        return -1;
694
    }
695

    
696
    for (i = 0; i < material_package->tracks_count; i++) {
697
        MXFPackage *source_package = NULL;
698
        MXFTrack *material_track = NULL;
699
        MXFTrack *source_track = NULL;
700
        MXFTrack *temp_track = NULL;
701
        MXFDescriptor *descriptor = NULL;
702
        MXFStructuralComponent *component = NULL;
703
        UID *essence_container_ul = NULL;
704
        const MXFCodecUL *codec_ul = NULL;
705
        const MXFCodecUL *container_ul = NULL;
706
        AVStream *st;
707

    
708
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
709
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
710
            continue;
711
        }
712

    
713
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
714
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
715
            return -1;
716
        }
717

    
718
        /* TODO: handle multiple source clips */
719
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
720
            /* TODO: handle timecode component */
721
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
722
            if (!component)
723
                continue;
724

    
725
            for (k = 0; k < mxf->packages_count; k++) {
726
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
727
                if (!temp_package)
728
                    continue;
729
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
730
                    source_package = temp_package;
731
                    break;
732
                }
733
            }
734
            if (!source_package) {
735
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
736
                break;
737
            }
738
            for (k = 0; k < source_package->tracks_count; k++) {
739
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
740
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
741
                    return -1;
742
                }
743
                if (temp_track->track_id == component->source_track_id) {
744
                    source_track = temp_track;
745
                    break;
746
                }
747
            }
748
            if (!source_track) {
749
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
750
                break;
751
            }
752
        }
753
        if (!source_track)
754
            continue;
755

    
756
        st = av_new_stream(mxf->fc, source_track->track_id);
757
        if (!st) {
758
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
759
            return -1;
760
        }
761
        st->priv_data = source_track;
762
        st->duration = component->duration;
763
        if (st->duration == -1)
764
            st->duration = AV_NOPTS_VALUE;
765
        st->start_time = component->start_position;
766
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
767

    
768
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
769
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
770
            return -1;
771
        }
772

    
773
#ifdef DEBUG
774
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
775
#endif
776
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
777

    
778
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
779
        if (source_package->descriptor) {
780
            if (source_package->descriptor->type == MultipleDescriptor) {
781
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
782
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
783

    
784
                    if (!sub_descriptor) {
785
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
786
                        continue;
787
                    }
788
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
789
                        descriptor = sub_descriptor;
790
                        break;
791
                    }
792
                }
793
            } else if (source_package->descriptor->type == Descriptor)
794
                descriptor = source_package->descriptor;
795
        }
796
        if (!descriptor) {
797
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
798
            continue;
799
        }
800
#ifdef DEBUG
801
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
802
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
803
#endif
804
        essence_container_ul = &descriptor->essence_container_ul;
805
        /* HACK: replacing the original key with mxf_encrypted_essence_container
806
         * is not allowed according to s429-6, try to find correct information anyway */
807
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
808
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
809
            for (k = 0; k < mxf->metadata_sets_count; k++) {
810
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
811
                if (metadata->type == CryptoContext) {
812
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
813
                    break;
814
                }
815
            }
816
        }
817
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
818
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
819
        st->codec->codec_id = codec_ul->id;
820
        if (descriptor->extradata) {
821
            st->codec->extradata = descriptor->extradata;
822
            st->codec->extradata_size = descriptor->extradata_size;
823
        }
824
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
825
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
826
            if (st->codec->codec_id == CODEC_ID_NONE)
827
                st->codec->codec_id = container_ul->id;
828
            st->codec->width = descriptor->width;
829
            st->codec->height = descriptor->height;
830
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
831
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
832
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
833
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
834
            if (st->codec->codec_id == CODEC_ID_NONE)
835
                st->codec->codec_id = container_ul->id;
836
            st->codec->channels = descriptor->channels;
837
            st->codec->bits_per_sample = descriptor->bits_per_sample;
838
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
839
            /* TODO: implement CODEC_ID_RAWAUDIO */
840
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
841
                if (descriptor->bits_per_sample == 24)
842
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
843
                else if (descriptor->bits_per_sample == 32)
844
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
845
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
846
                if (descriptor->bits_per_sample == 24)
847
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
848
                else if (descriptor->bits_per_sample == 32)
849
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
850
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
851
                st->need_parsing = AVSTREAM_PARSE_FULL;
852
            }
853
        }
854
        if (container_ul && container_ul->wrapping == Clip) {
855
            dprintf(mxf->fc, "stream %d: clip wrapped essence\n", st->index);
856
            st->need_parsing = AVSTREAM_PARSE_FULL;
857
        }
858
    }
859
    return 0;
860
}
861

    
862
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
863
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
864
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
865
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
866
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
867
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
868
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
869
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
870
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
871
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
872
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
873
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
874
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
875
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Static Track */
876
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Generic Track */
877
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_metadata_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
878
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
879
};
880

    
881
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
882
{
883
    ByteIOContext *pb = mxf->fc->pb;
884
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
885
    uint64_t klv_end= url_ftell(pb) + klv->length;
886

    
887
    while (url_ftell(pb) + 4 < klv_end) {
888
        int tag = get_be16(pb);
889
        int size = get_be16(pb); /* KLV specified by 0x53 */
890
        uint64_t next= url_ftell(pb) + size;
891

    
892
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
893
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
894
            continue;
895
        }
896
        if(ctx_size && tag == 0x3C0A)
897
            get_buffer(pb, ctx->uid, 16);
898
        else
899
            read_child(ctx, pb, tag, size);
900

    
901
        url_fseek(pb, next, SEEK_SET);
902
    }
903
    if (ctx_size) ctx->type = type;
904
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
905
}
906

    
907
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
908
{
909
    MXFContext *mxf = s->priv_data;
910
    KLVPacket klv;
911

    
912
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
913
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
914
        return -1;
915
    }
916
    url_fseek(s->pb, -14, SEEK_CUR);
917
    mxf->fc = s;
918
    while (!url_feof(s->pb)) {
919
        const MXFMetadataReadTableEntry *metadata;
920

    
921
        if (klv_read_packet(&klv, s->pb) < 0)
922
            return -1;
923
#ifdef DEBUG
924
        PRINT_KEY(s, "read header", klv.key);
925
#endif
926
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
927
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
928
            /* FIXME avoid seek */
929
            url_fseek(s->pb, klv.offset, SEEK_SET);
930
            break;
931
        }
932

    
933
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
934
            if (IS_KLV_KEY(klv.key, metadata->key)) {
935
                if (mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
936
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
937
                    return -1;
938
                }
939
                break;
940
            }
941
        }
942
        if (!metadata->read)
943
            url_fskip(s->pb, klv.length);
944
    }
945
    return mxf_parse_structural_metadata(mxf);
946
}
947

    
948
static int mxf_read_close(AVFormatContext *s)
949
{
950
    MXFContext *mxf = s->priv_data;
951
    int i;
952

    
953
    av_freep(&mxf->packages_refs);
954
    for (i = 0; i < mxf->metadata_sets_count; i++) {
955
        switch (mxf->metadata_sets[i]->type) {
956
        case MultipleDescriptor:
957
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
958
            break;
959
        case Sequence:
960
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
961
            break;
962
        case SourcePackage:
963
        case MaterialPackage:
964
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
965
            break;
966
        default:
967
            break;
968
        }
969
        av_freep(&mxf->metadata_sets[i]);
970
    }
971
    av_freep(&mxf->metadata_sets);
972
    av_freep(&mxf->aesc);
973
    return 0;
974
}
975

    
976
static int mxf_probe(AVProbeData *p) {
977
    uint8_t *bufp = p->buf;
978
    uint8_t *end = p->buf + p->buf_size;
979

    
980
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
981
        return 0;
982

    
983
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
984
    end -= sizeof(mxf_header_partition_pack_key);
985
    for (; bufp < end; bufp++) {
986
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
987
            return AVPROBE_SCORE_MAX;
988
    }
989
    return 0;
990
}
991

    
992
/* rudimentary byte seek */
993
/* XXX: use MXF Index */
994
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
995
{
996
    AVStream *st = s->streams[stream_index];
997
    int64_t seconds;
998

    
999
    if (!s->bit_rate)
1000
        return -1;
1001
    if (sample_time < 0)
1002
        sample_time = 0;
1003
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1004
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1005
    av_update_cur_dts(s, st, sample_time);
1006
    return 0;
1007
}
1008

    
1009
AVInputFormat mxf_demuxer = {
1010
    "mxf",
1011
    "MXF format",
1012
    sizeof(MXFContext),
1013
    mxf_probe,
1014
    mxf_read_header,
1015
    mxf_read_packet,
1016
    mxf_read_close,
1017
    mxf_read_seek,
1018
};