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1 d09ea6ba Baptiste Coudurier
/*
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
 *
12
 * 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.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/*
23
 * References
24
 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25
 * SMPTE 377M MXF File Format Specifications
26
 * SMPTE 378M Operational Pattern 1a
27
 * SMPTE 379M MXF Generic Container
28
 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29
 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
31
 *
32
 * Principle
33
 * Search for Track numbers which will identify essence element KLV packets.
34
 * Search for SourcePackage which define tracks which contains Track numbers.
35
 * Material Package contains tracks with reference to SourcePackage tracks.
36
 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37
 * Assign Descriptors to correct Tracks.
38
 *
39
 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40
 * Metadata parsing resolves Strong References to objects.
41
 *
42
 * Simple demuxer, only OP1A supported and some files might not work at all.
43
 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
44
 */
45
46
//#define DEBUG
47
48
#include "libavutil/aes.h"
49 c69968b4 Zhentan Feng
#include "mxf.h"
50 d09ea6ba Baptiste Coudurier
51
typedef struct {
52
    UID uid;
53
    enum MXFMetadataSetType type;
54
    UID source_container_ul;
55
} MXFCryptoContext;
56
57
typedef struct {
58
    UID uid;
59
    enum MXFMetadataSetType type;
60
    UID source_package_uid;
61
    UID data_definition_ul;
62
    int64_t duration;
63
    int64_t start_position;
64
    int source_track_id;
65
} MXFStructuralComponent;
66
67
typedef struct {
68
    UID uid;
69
    enum MXFMetadataSetType type;
70
    UID data_definition_ul;
71
    UID *structural_components_refs;
72
    int structural_components_count;
73
    int64_t duration;
74
} MXFSequence;
75
76
typedef struct {
77
    UID uid;
78
    enum MXFMetadataSetType type;
79
    MXFSequence *sequence; /* mandatory, and only one */
80
    UID sequence_ref;
81
    int track_id;
82
    uint8_t track_number[4];
83
    AVRational edit_rate;
84
} MXFTrack;
85
86
typedef struct {
87
    UID uid;
88
    enum MXFMetadataSetType type;
89
    UID essence_container_ul;
90
    UID essence_codec_ul;
91
    AVRational sample_rate;
92
    AVRational aspect_ratio;
93
    int width;
94
    int height;
95
    int channels;
96
    int bits_per_sample;
97
    UID *sub_descriptors_refs;
98
    int sub_descriptors_count;
99
    int linked_track_id;
100
    uint8_t *extradata;
101
    int extradata_size;
102
} MXFDescriptor;
103
104
typedef struct {
105
    UID uid;
106
    enum MXFMetadataSetType type;
107
    UID package_uid;
108
    UID *tracks_refs;
109
    int tracks_count;
110
    MXFDescriptor *descriptor; /* only one */
111
    UID descriptor_ref;
112
} MXFPackage;
113
114
typedef struct {
115
    UID uid;
116
    enum MXFMetadataSetType type;
117
} MXFMetadataSet;
118
119
typedef struct {
120
    UID *packages_refs;
121
    int packages_count;
122
    MXFMetadataSet **metadata_sets;
123
    int metadata_sets_count;
124
    AVFormatContext *fc;
125
    struct AVAES *aesc;
126
    uint8_t *local_tags;
127
    int local_tags_count;
128
} MXFContext;
129
130
enum MXFWrappingScheme {
131
    Frame,
132
    Clip,
133
};
134
135
typedef struct {
136
    const UID key;
137
    int (*read)();
138
    int ctx_size;
139
    enum MXFMetadataSetType type;
140
} MXFMetadataReadTableEntry;
141
142
/* partial keys to match */
143
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
144
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
145
static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
146
/* complete keys to match */
147
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 };
148
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
149
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
150
static const uint8_t mxf_sony_mpeg4_extradata[]            = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
151
152
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
153
154
static int64_t klv_decode_ber_length(ByteIOContext *pb)
155
{
156
    uint64_t size = get_byte(pb);
157
    if (size & 0x80) { /* long form */
158
        int bytes_num = size & 0x7f;
159
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
160
        if (bytes_num > 8)
161
            return -1;
162
        size = 0;
163
        while (bytes_num--)
164
            size = size << 8 | get_byte(pb);
165
    }
166
    return size;
167
}
168
169
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
170
{
171
    int i, b;
172
    for (i = 0; i < size && !url_feof(pb); i++) {
173
        b = get_byte(pb);
174
        if (b == key[0])
175
            i = 0;
176
        else if (b != key[i])
177
            i = -1;
178
    }
179
    return i == size;
180
}
181
182
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
183
{
184
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
185
        return -1;
186
    klv->offset = url_ftell(pb) - 4;
187
    memcpy(klv->key, mxf_klv_key, 4);
188
    get_buffer(pb, klv->key + 4, 12);
189
    klv->length = klv_decode_ber_length(pb);
190
    return klv->length == -1 ? -1 : 0;
191
}
192
193
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
194
{
195
    int i;
196
197
    for (i = 0; i < s->nb_streams; i++) {
198
        MXFTrack *track = s->streams[i]->priv_data;
199
        /* SMPTE 379M 7.3 */
200
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
201
            return i;
202
    }
203
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
204
    return s->nb_streams == 1 ? 0 : -1;
205
}
206
207
/* XXX: use AVBitStreamFilter */
208
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
209
{
210
    uint8_t buffer[61444];
211
    const uint8_t *buf_ptr, *end_ptr;
212
    uint8_t *data_ptr;
213
    int i;
214
215
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
216
        return -1;
217
    get_buffer(pb, buffer, length);
218
    av_new_packet(pkt, length);
219
    data_ptr = pkt->data;
220
    end_ptr = buffer + length;
221
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
222
    for (; buf_ptr < end_ptr; ) {
223
        for (i = 0; i < st->codec->channels; i++) {
224
            uint32_t sample = bytestream_get_le32(&buf_ptr);
225 dd1c8f3e Luca Abeni
            if (st->codec->bits_per_coded_sample == 24)
226 d09ea6ba Baptiste Coudurier
                bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
227
            else
228
                bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
229
        }
230
        buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
231
    }
232
    pkt->size = data_ptr - pkt->data;
233
    return 0;
234
}
235
236
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
237
{
238
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
239
    MXFContext *mxf = s->priv_data;
240
    ByteIOContext *pb = s->pb;
241 bc5c918e Diego Biurrun
    int64_t end = url_ftell(pb) + klv->length;
242 d09ea6ba Baptiste Coudurier
    uint64_t size;
243
    uint64_t orig_size;
244
    uint64_t plaintext_size;
245
    uint8_t ivec[16];
246
    uint8_t tmpbuf[16];
247
    int index;
248
249
    if (!mxf->aesc && s->key && s->keylen == 16) {
250
        mxf->aesc = av_malloc(av_aes_size);
251
        if (!mxf->aesc)
252
            return -1;
253
        av_aes_init(mxf->aesc, s->key, 128, 1);
254
    }
255
    // crypto context
256
    url_fskip(pb, klv_decode_ber_length(pb));
257
    // plaintext offset
258
    klv_decode_ber_length(pb);
259
    plaintext_size = get_be64(pb);
260
    // source klv key
261
    klv_decode_ber_length(pb);
262
    get_buffer(pb, klv->key, 16);
263
    if (!IS_KLV_KEY(klv, mxf_essence_element_key))
264
        return -1;
265
    index = mxf_get_stream_index(s, klv);
266
    if (index < 0)
267
        return -1;
268
    // source size
269
    klv_decode_ber_length(pb);
270
    orig_size = get_be64(pb);
271
    if (orig_size < plaintext_size)
272
        return -1;
273
    // enc. code
274
    size = klv_decode_ber_length(pb);
275
    if (size < 32 || size - 32 < orig_size)
276
        return -1;
277
    get_buffer(pb, ivec, 16);
278
    get_buffer(pb, tmpbuf, 16);
279
    if (mxf->aesc)
280
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
281
    if (memcmp(tmpbuf, checkv, 16))
282
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
283
    size -= 32;
284
    av_get_packet(pb, pkt, size);
285
    size -= plaintext_size;
286
    if (mxf->aesc)
287
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
288
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
289
    pkt->size = orig_size;
290
    pkt->stream_index = index;
291
    url_fskip(pb, end - url_ftell(pb));
292
    return 0;
293
}
294
295
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
296
{
297
    KLVPacket klv;
298
299
    while (!url_feof(s->pb)) {
300
        if (klv_read_packet(&klv, s->pb) < 0)
301
            return -1;
302
        PRINT_KEY(s, "read packet", klv.key);
303
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
304
            int res = mxf_decrypt_triplet(s, pkt, &klv);
305
            if (res < 0) {
306
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
307
                return -1;
308
            }
309
            return 0;
310
        }
311
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
312
            int index = mxf_get_stream_index(s, &klv);
313
            if (index < 0) {
314 66ec3d56 Baptiste Coudurier
                av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
315 d09ea6ba Baptiste Coudurier
                goto skip;
316
            }
317
            if (s->streams[index]->discard == AVDISCARD_ALL)
318
                goto skip;
319
            /* check for 8 channels AES3 element */
320
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
321
                if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
322
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
323
                    return -1;
324
                }
325
            } else
326
                av_get_packet(s->pb, pkt, klv.length);
327
            pkt->stream_index = index;
328
            pkt->pos = klv.offset;
329
            return 0;
330
        } else
331
        skip:
332
            url_fskip(s->pb, klv.length);
333
    }
334
    return AVERROR(EIO);
335
}
336
337
static int mxf_read_primer_pack(MXFContext *mxf)
338
{
339
    ByteIOContext *pb = mxf->fc->pb;
340
    int item_num = get_be32(pb);
341
    int item_len = get_be32(pb);
342
343
    if (item_len != 18) {
344
        av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
345
        return -1;
346
    }
347
    if (item_num > UINT_MAX / item_len)
348
        return -1;
349
    mxf->local_tags_count = item_num;
350
    mxf->local_tags = av_malloc(item_num*item_len);
351
    if (!mxf->local_tags)
352
        return -1;
353
    get_buffer(pb, mxf->local_tags, item_num*item_len);
354
    return 0;
355
}
356
357
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
358
{
359
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
360
    if (!mxf->metadata_sets)
361
        return -1;
362
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
363
    mxf->metadata_sets_count++;
364
    return 0;
365
}
366
367
static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
368
{
369
    if (size != 16)
370
        return -1;
371
    if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
372
        get_buffer(pb, cryptocontext->source_container_ul, 16);
373
    return 0;
374
}
375
376
static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
377
{
378
    switch (tag) {
379
    case 0x1901:
380
        mxf->packages_count = get_be32(pb);
381
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
382
            return -1;
383
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
384
        if (!mxf->packages_refs)
385
            return -1;
386
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
387
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
388
        break;
389
    }
390
    return 0;
391
}
392
393
static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
394
{
395
    switch(tag) {
396
    case 0x0202:
397
        source_clip->duration = get_be64(pb);
398
        break;
399
    case 0x1201:
400
        source_clip->start_position = get_be64(pb);
401
        break;
402
    case 0x1101:
403
        /* UMID, only get last 16 bytes */
404
        url_fskip(pb, 16);
405
        get_buffer(pb, source_clip->source_package_uid, 16);
406
        break;
407
    case 0x1102:
408
        source_clip->source_track_id = get_be32(pb);
409
        break;
410
    }
411
    return 0;
412
}
413
414
static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
415
{
416
    switch(tag) {
417
    case 0x4403:
418
        package->tracks_count = get_be32(pb);
419
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
420
            return -1;
421
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
422
        if (!package->tracks_refs)
423
            return -1;
424
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
425
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
426
        break;
427
    }
428
    return 0;
429
}
430
431
static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
432
{
433
    switch(tag) {
434
    case 0x4801:
435
        track->track_id = get_be32(pb);
436
        break;
437
    case 0x4804:
438
        get_buffer(pb, track->track_number, 4);
439
        break;
440
    case 0x4B01:
441
        track->edit_rate.den = get_be32(pb);
442
        track->edit_rate.num = get_be32(pb);
443
        break;
444
    case 0x4803:
445
        get_buffer(pb, track->sequence_ref, 16);
446
        break;
447
    }
448
    return 0;
449
}
450
451
static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
452
{
453
    switch(tag) {
454
    case 0x0202:
455
        sequence->duration = get_be64(pb);
456
        break;
457
    case 0x0201:
458
        get_buffer(pb, sequence->data_definition_ul, 16);
459
        break;
460
    case 0x1001:
461
        sequence->structural_components_count = get_be32(pb);
462
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
463
            return -1;
464
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
465
        if (!sequence->structural_components_refs)
466
            return -1;
467
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
468
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
469
        break;
470
    }
471
    return 0;
472
}
473
474
static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
475
{
476
    switch(tag) {
477
    case 0x4403:
478
        package->tracks_count = get_be32(pb);
479
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
480
            return -1;
481
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
482
        if (!package->tracks_refs)
483
            return -1;
484
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
485
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
486
        break;
487
    case 0x4401:
488
        /* UMID, only get last 16 bytes */
489
        url_fskip(pb, 16);
490
        get_buffer(pb, package->package_uid, 16);
491
        break;
492
    case 0x4701:
493
        get_buffer(pb, package->descriptor_ref, 16);
494
        break;
495
    }
496
    return 0;
497
}
498
499
static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
500
{
501
    int code;
502
503
    do {
504
        code = get_byte(pb);
505
        dprintf(NULL, "pixel layout: code 0x%x\n", code);
506
        switch (code) {
507
        case 0x52: /* R */
508
            descriptor->bits_per_sample += get_byte(pb);
509
            break;
510
        case 0x47: /* G */
511
            descriptor->bits_per_sample += get_byte(pb);
512
            break;
513
        case 0x42: /* B */
514
            descriptor->bits_per_sample += get_byte(pb);
515
            break;
516
        default:
517
            get_byte(pb);
518
        }
519
    } while (code != 0); /* SMPTE 377M E.2.46 */
520
}
521
522
static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
523
{
524
    switch(tag) {
525
    case 0x3F01:
526
        descriptor->sub_descriptors_count = get_be32(pb);
527
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
528
            return -1;
529
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
530
        if (!descriptor->sub_descriptors_refs)
531
            return -1;
532
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
533
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
534
        break;
535
    case 0x3004:
536
        get_buffer(pb, descriptor->essence_container_ul, 16);
537
        break;
538
    case 0x3006:
539
        descriptor->linked_track_id = get_be32(pb);
540
        break;
541
    case 0x3201: /* PictureEssenceCoding */
542
        get_buffer(pb, descriptor->essence_codec_ul, 16);
543
        break;
544
    case 0x3203:
545
        descriptor->width = get_be32(pb);
546
        break;
547
    case 0x3202:
548
        descriptor->height = get_be32(pb);
549
        break;
550
    case 0x320E:
551
        descriptor->aspect_ratio.num = get_be32(pb);
552
        descriptor->aspect_ratio.den = get_be32(pb);
553
        break;
554
    case 0x3D03:
555
        descriptor->sample_rate.num = get_be32(pb);
556
        descriptor->sample_rate.den = get_be32(pb);
557
        break;
558
    case 0x3D06: /* SoundEssenceCompression */
559
        get_buffer(pb, descriptor->essence_codec_ul, 16);
560
        break;
561
    case 0x3D07:
562
        descriptor->channels = get_be32(pb);
563
        break;
564
    case 0x3D01:
565
        descriptor->bits_per_sample = get_be32(pb);
566
        break;
567
    case 0x3401:
568
        mxf_read_pixel_layout(pb, descriptor);
569
        break;
570
    default:
571
        /* Private uid used by SONY C0023S01.mxf */
572
        if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
573
            descriptor->extradata = av_malloc(size);
574
            if (!descriptor->extradata)
575
                return -1;
576
            descriptor->extradata_size = size;
577
            get_buffer(pb, descriptor->extradata, size);
578
        }
579
        break;
580
    }
581
    return 0;
582
}
583
584
/*
585
 * Match an uid independently of the version byte and up to len common bytes
586
 * Returns: boolean
587
 */
588
static int mxf_match_uid(const UID key, const UID uid, int len)
589
{
590
    int i;
591
    for (i = 0; i < len; i++) {
592
        if (i != 7 && key[i] != uid[i])
593
            return 0;
594
    }
595
    return 1;
596
}
597
598
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
599
{
600
    while (uls->id != CODEC_ID_NONE) {
601
        if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
602
            break;
603
        uls++;
604
    }
605
    return uls;
606
}
607
608
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
609
{
610
    while (uls->type != CODEC_TYPE_DATA) {
611
        if(mxf_match_uid(uls->uid, *uid, 16))
612
            break;
613
        uls++;
614
    }
615
    return uls->type;
616
}
617
618
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
619
{
620
    int i;
621
622
    if (!strong_ref)
623
        return NULL;
624
    for (i = 0; i < mxf->metadata_sets_count; i++) {
625
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
626
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
627
            return mxf->metadata_sets[i];
628
        }
629
    }
630
    return NULL;
631
}
632
633 4ee873e3 Baptiste Coudurier
static const MXFCodecUL mxf_essence_container_uls[] = {
634
    // video essence container uls
635
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
636
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
637
    // sound essence container uls
638
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
639
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14,       CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
640
    { { 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 */
641
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  0,      CODEC_ID_NONE },
642
};
643
644 d09ea6ba Baptiste Coudurier
static int mxf_parse_structural_metadata(MXFContext *mxf)
645
{
646
    MXFPackage *material_package = NULL;
647
    MXFPackage *temp_package = NULL;
648
    int i, j, k;
649
650
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
651
    /* TODO: handle multiple material packages (OP3x) */
652
    for (i = 0; i < mxf->packages_count; i++) {
653
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
654
        if (material_package) break;
655
    }
656
    if (!material_package) {
657
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
658
        return -1;
659
    }
660
661
    for (i = 0; i < material_package->tracks_count; i++) {
662
        MXFPackage *source_package = NULL;
663
        MXFTrack *material_track = NULL;
664
        MXFTrack *source_track = NULL;
665
        MXFTrack *temp_track = NULL;
666
        MXFDescriptor *descriptor = NULL;
667
        MXFStructuralComponent *component = NULL;
668
        UID *essence_container_ul = NULL;
669
        const MXFCodecUL *codec_ul = NULL;
670
        const MXFCodecUL *container_ul = NULL;
671
        AVStream *st;
672
673
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
674
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
675
            continue;
676
        }
677
678
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
679
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
680
            return -1;
681
        }
682
683
        /* TODO: handle multiple source clips */
684
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
685
            /* TODO: handle timecode component */
686
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
687
            if (!component)
688
                continue;
689
690
            for (k = 0; k < mxf->packages_count; k++) {
691
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
692
                if (!temp_package)
693
                    continue;
694
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
695
                    source_package = temp_package;
696
                    break;
697
                }
698
            }
699
            if (!source_package) {
700
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
701
                break;
702
            }
703
            for (k = 0; k < source_package->tracks_count; k++) {
704
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
705
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
706
                    return -1;
707
                }
708
                if (temp_track->track_id == component->source_track_id) {
709
                    source_track = temp_track;
710
                    break;
711
                }
712
            }
713
            if (!source_track) {
714
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
715
                break;
716
            }
717
        }
718
        if (!source_track)
719
            continue;
720
721
        st = av_new_stream(mxf->fc, source_track->track_id);
722
        if (!st) {
723
            av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
724
            return -1;
725
        }
726
        st->priv_data = source_track;
727
        st->duration = component->duration;
728
        if (st->duration == -1)
729
            st->duration = AV_NOPTS_VALUE;
730
        st->start_time = component->start_position;
731
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
732
733
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
734
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
735
            return -1;
736
        }
737
738
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
739 c69968b4 Zhentan Feng
        st->codec->codec_type = mxf_get_codec_type(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
740 d09ea6ba Baptiste Coudurier
741
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
742
        if (source_package->descriptor) {
743
            if (source_package->descriptor->type == MultipleDescriptor) {
744
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
745
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
746
747
                    if (!sub_descriptor) {
748
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
749
                        continue;
750
                    }
751
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
752
                        descriptor = sub_descriptor;
753
                        break;
754
                    }
755
                }
756
            } else if (source_package->descriptor->type == Descriptor)
757
                descriptor = source_package->descriptor;
758
        }
759
        if (!descriptor) {
760
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
761
            continue;
762
        }
763
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
764
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
765
        essence_container_ul = &descriptor->essence_container_ul;
766
        /* HACK: replacing the original key with mxf_encrypted_essence_container
767
         * is not allowed according to s429-6, try to find correct information anyway */
768
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
769
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
770
            for (k = 0; k < mxf->metadata_sets_count; k++) {
771
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
772
                if (metadata->type == CryptoContext) {
773
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
774
                    break;
775
                }
776
            }
777
        }
778
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
779 c69968b4 Zhentan Feng
        codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
780 d09ea6ba Baptiste Coudurier
        st->codec->codec_id = codec_ul->id;
781
        if (descriptor->extradata) {
782
            st->codec->extradata = descriptor->extradata;
783
            st->codec->extradata_size = descriptor->extradata_size;
784
        }
785
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
786 4ee873e3 Baptiste Coudurier
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
787 d09ea6ba Baptiste Coudurier
            if (st->codec->codec_id == CODEC_ID_NONE)
788
                st->codec->codec_id = container_ul->id;
789
            st->codec->width = descriptor->width;
790
            st->codec->height = descriptor->height;
791 dd1c8f3e Luca Abeni
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample; /* Uncompressed */
792 d09ea6ba Baptiste Coudurier
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
793
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
794 4ee873e3 Baptiste Coudurier
            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
795 d09ea6ba Baptiste Coudurier
            if (st->codec->codec_id == CODEC_ID_NONE)
796
                st->codec->codec_id = container_ul->id;
797
            st->codec->channels = descriptor->channels;
798 dd1c8f3e Luca Abeni
            st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
799 d09ea6ba Baptiste Coudurier
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
800
            /* TODO: implement CODEC_ID_RAWAUDIO */
801
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
802
                if (descriptor->bits_per_sample == 24)
803
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
804
                else if (descriptor->bits_per_sample == 32)
805
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
806
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
807
                if (descriptor->bits_per_sample == 24)
808
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
809
                else if (descriptor->bits_per_sample == 32)
810
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
811
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
812
                st->need_parsing = AVSTREAM_PARSE_FULL;
813
            }
814
        }
815
        if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
816
            av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
817
            st->need_parsing = AVSTREAM_PARSE_FULL;
818
        }
819
    }
820
    return 0;
821
}
822
823
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
824
    { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
825
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
826
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
827
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
828
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
829
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
830
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
831
    { { 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 */
832
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
833
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
834
    { { 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 */
835
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
836
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
837
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
838
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
839
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
840
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
841
};
842
843
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
844
{
845
    ByteIOContext *pb = mxf->fc->pb;
846
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
847
    uint64_t klv_end = url_ftell(pb) + klv->length;
848
849
    if (!ctx)
850
        return -1;
851
    while (url_ftell(pb) + 4 < klv_end) {
852
        int tag = get_be16(pb);
853
        int size = get_be16(pb); /* KLV specified by 0x53 */
854
        uint64_t next = url_ftell(pb) + size;
855
        UID uid = {0};
856
857
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
858
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
859
            continue;
860
        }
861
        if (tag > 0x7FFF) { /* dynamic tag */
862
            int i;
863
            for (i = 0; i < mxf->local_tags_count; i++) {
864
                int local_tag = AV_RB16(mxf->local_tags+i*18);
865
                if (local_tag == tag) {
866
                    memcpy(uid, mxf->local_tags+i*18+2, 16);
867
                    dprintf(mxf->fc, "local tag 0x%04X\n", local_tag);
868
                    PRINT_KEY(mxf->fc, "uid", uid);
869
                }
870
            }
871
        }
872
        if (ctx_size && tag == 0x3C0A)
873
            get_buffer(pb, ctx->uid, 16);
874
        else if (read_child(ctx, pb, tag, size, uid) < 0)
875
            return -1;
876
877
        url_fseek(pb, next, SEEK_SET);
878
    }
879
    if (ctx_size) ctx->type = type;
880
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
881
}
882
883
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
884
{
885
    MXFContext *mxf = s->priv_data;
886
    KLVPacket klv;
887
888
    if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
889
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
890
        return -1;
891
    }
892
    url_fseek(s->pb, -14, SEEK_CUR);
893
    mxf->fc = s;
894
    while (!url_feof(s->pb)) {
895
        const MXFMetadataReadTableEntry *metadata;
896
897
        if (klv_read_packet(&klv, s->pb) < 0)
898
            return -1;
899
        PRINT_KEY(s, "read header", klv.key);
900
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
901
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
902
            /* FIXME avoid seek */
903
            url_fseek(s->pb, klv.offset, SEEK_SET);
904
            break;
905
        }
906
907
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
908
            if (IS_KLV_KEY(klv.key, metadata->key)) {
909
                int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
910
                if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
911
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
912
                    return -1;
913
                }
914
                break;
915
            }
916
        }
917
        if (!metadata->read)
918
            url_fskip(s->pb, klv.length);
919
    }
920
    return mxf_parse_structural_metadata(mxf);
921
}
922
923
static int mxf_read_close(AVFormatContext *s)
924
{
925
    MXFContext *mxf = s->priv_data;
926
    int i;
927
928
    av_freep(&mxf->packages_refs);
929
    for (i = 0; i < mxf->metadata_sets_count; i++) {
930
        switch (mxf->metadata_sets[i]->type) {
931
        case MultipleDescriptor:
932
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
933
            break;
934
        case Sequence:
935
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
936
            break;
937
        case SourcePackage:
938
        case MaterialPackage:
939
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
940
            break;
941
        case Track:
942
            mxf->metadata_sets[i] = NULL; /* will be freed later */
943
            break;
944
        default:
945
            break;
946
        }
947
        av_freep(&mxf->metadata_sets[i]);
948
    }
949
    av_freep(&mxf->metadata_sets);
950
    av_freep(&mxf->aesc);
951
    av_freep(&mxf->local_tags);
952
    return 0;
953
}
954
955
static int mxf_probe(AVProbeData *p) {
956
    uint8_t *bufp = p->buf;
957
    uint8_t *end = p->buf + p->buf_size;
958
959
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
960
        return 0;
961
962
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
963
    end -= sizeof(mxf_header_partition_pack_key);
964
    for (; bufp < end; bufp++) {
965
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
966
            return AVPROBE_SCORE_MAX;
967
    }
968
    return 0;
969
}
970
971
/* rudimentary byte seek */
972
/* XXX: use MXF Index */
973
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
974
{
975
    AVStream *st = s->streams[stream_index];
976
    int64_t seconds;
977
978
    if (!s->bit_rate)
979
        return -1;
980
    if (sample_time < 0)
981
        sample_time = 0;
982
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
983
    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
984
    av_update_cur_dts(s, st, sample_time);
985
    return 0;
986
}
987
988
AVInputFormat mxf_demuxer = {
989
    "mxf",
990
    NULL_IF_CONFIG_SMALL("Material eXchange Format"),
991
    sizeof(MXFContext),
992
    mxf_probe,
993
    mxf_read_header,
994
    mxf_read_packet,
995
    mxf_read_close,
996
    mxf_read_seek,
997
};