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ffmpeg / libavformat / mxf.c @ 86074ce3

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1
/*
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 * MXF demuxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
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 *
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 * This file is part of FFmpeg.
6
 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * 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
/*
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 * 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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 *
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 * 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
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 */
45

    
46
//#define DEBUG
47

    
48
#include "avformat.h"
49

    
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typedef uint8_t UID[16];
51

    
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enum MXFMetadataSetType {
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    AnyType,
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    MaterialPackage,
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    SourcePackage,
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    SourceClip,
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    TimecodeComponent,
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    Sequence,
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    MultipleDescriptor,
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    Descriptor,
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    Track,
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    EssenceContainerData,
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};
64

    
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typedef struct MXFStructuralComponent {
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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;
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    int64_t duration;
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    int64_t start_position;
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    int source_track_id;
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} MXFStructuralComponent;
74

    
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typedef struct MXFSequence {
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    UID uid;
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    enum MXFMetadataSetType type;
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    UID data_definition_ul;
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    UID *structural_components_refs;
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    int structural_components_count;
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    int64_t duration;
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} MXFSequence;
83

    
84
typedef struct MXFTrack {
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    UID uid;
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    enum MXFMetadataSetType type;
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    MXFSequence *sequence; /* mandatory, and only one */
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    UID sequence_ref;
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    int track_id;
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    uint8_t track_number[4];
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    AVRational edit_rate;
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} MXFTrack;
93

    
94
typedef struct MXFDescriptor {
95
    UID uid;
96
    enum MXFMetadataSetType type;
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    UID essence_container_ul;
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    UID essence_codec_ul;
99
    AVRational sample_rate;
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    AVRational aspect_ratio;
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    int width;
102
    int height;
103
    int channels;
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    int bits_per_sample;
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    UID *sub_descriptors_refs;
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    int sub_descriptors_count;
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    int linked_track_id;
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    uint8_t *extradata;
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    int extradata_size;
110
} MXFDescriptor;
111

    
112
typedef struct MXFPackage {
113
    UID uid;
114
    enum MXFMetadataSetType type;
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    UID package_uid;
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    UID *tracks_refs;
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    int tracks_count;
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    MXFDescriptor *descriptor; /* only one */
119
    UID descriptor_ref;
120
} MXFPackage;
121

    
122
typedef struct MXFEssenceContainerData {
123
    UID uid;
124
    enum MXFMetadataSetType type;
125
    UID linked_package_uid;
126
} MXFEssenceContainerData;
127

    
128
typedef struct {
129
    UID uid;
130
    enum MXFMetadataSetType type;
131
} MXFMetadataSet;
132

    
133
typedef struct MXFContext {
134
    UID *packages_refs;
135
    int packages_count;
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    UID *essence_container_data_sets_refs;
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    int essence_container_data_sets_count;
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    UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
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    int essence_containers_uls_count;
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    UID operational_pattern_ul;
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    UID content_storage_uid;
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    MXFMetadataSet **metadata_sets;
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    int metadata_sets_count;
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    uint8_t *sync_key;
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    AVFormatContext *fc;
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} MXFContext;
147

    
148
typedef struct KLVPacket {
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    UID key;
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    offset_t offset;
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    uint64_t length;
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} KLVPacket;
153

    
154
enum MXFWrappingScheme {
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    Frame,
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    Clip,
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};
158

    
159
typedef struct MXFCodecUL {
160
    UID uid;
161
    enum CodecID id;
162
    enum MXFWrappingScheme wrapping;
163
} MXFCodecUL;
164

    
165
typedef struct MXFDataDefinitionUL {
166
    UID uid;
167
    enum CodecType type;
168
} MXFDataDefinitionUL;
169

    
170
typedef struct MXFMetadataReadTableEntry {
171
    const UID key;
172
    int (*read)(MXFContext *mxf, KLVPacket *klv);
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
/* complete keys to match */
179
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
180

    
181
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
182

    
183
#define PRINT_KEY(s, x) dprintf("%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
184
                             (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])
185

    
186
static int64_t klv_decode_ber_length(ByteIOContext *pb)
187
{
188
    uint64_t size = get_byte(pb);
189
    if (size & 0x80) { /* long form */
190
        int bytes_num = size & 0x7f;
191
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
192
        if (bytes_num > 8)
193
            return -1;
194
        size = 0;
195
        while (bytes_num--)
196
            size = size << 8 | get_byte(pb);
197
    }
198
    return size;
199
}
200

    
201
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
202
{
203
    klv->offset = url_ftell(pb);
204
    get_buffer(pb, klv->key, 16);
205
    klv->length = klv_decode_ber_length(pb);
206
    return klv->length == -1 ? -1 : 0;
207
}
208

    
209
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
210
{
211
    int i;
212

    
213
    for (i = 0; i < s->nb_streams; i++) {
214
        MXFTrack *track = s->streams[i]->priv_data;
215
         /* SMPTE 379M 7.3 */
216
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
217
            return i;
218
    }
219
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
220
    return s->nb_streams == 1 ? 0 : -1;
221
}
222

    
223
/* XXX: use AVBitStreamFilter */
224
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
225
{
226
    uint8_t buffer[61444];
227
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
228

    
229
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
230
        return -1;
231
    get_buffer(pb, buffer, length);
232
    av_new_packet(pkt, length);
233
    data_ptr = pkt->data;
234
    end_ptr = buffer + length;
235
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
236
    for (; buf_ptr < end_ptr; buf_ptr += 4) {
237
        if (st->codec->bits_per_sample == 24) {
238
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
239
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
240
            data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
241
            data_ptr += 3;
242
        } else {
243
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
244
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
245
            data_ptr += 2;
246
        }
247
    }
248
    pkt->size = data_ptr - pkt->data;
249
    return 0;
250
}
251

    
252
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
253
{
254
    MXFContext *mxf = s->priv_data;
255
    KLVPacket klv;
256

    
257
    while (!url_feof(&s->pb)) {
258
        if (klv_read_packet(&klv, &s->pb) < 0) {
259
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
260
            return -1;
261
        }
262
#ifdef DEBUG
263
        PRINT_KEY("read packet", klv.key);
264
#endif
265
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
266
            mxf->sync_key = mxf_encrypted_triplet_key;
267
            av_log(s, AV_LOG_ERROR, "encrypted triplet not supported\n");
268
            return -1;
269
        }
270
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
271
            int index = mxf_get_stream_index(s, &klv);
272
            if (index < 0) {
273
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
274
                url_fskip(&s->pb, klv.length);
275
                return -1;
276
            }
277
            /* check for 8 channels AES3 element */
278
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
279
                if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
280
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
281
                    return -1;
282
                }
283
            } else
284
                av_get_packet(&s->pb, pkt, klv.length);
285
            pkt->stream_index = index;
286
            return 0;
287
        } else
288
            url_fskip(&s->pb, klv.length);
289
    }
290
    return AVERROR_IO;
291
}
292

    
293
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
294
{
295
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
296
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
297
    mxf->metadata_sets_count++;
298
    return 0;
299
}
300

    
301
static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
302
{
303
    ByteIOContext *pb = &mxf->fc->pb;
304
    int bytes_read = 0;
305

    
306
    while (bytes_read < klv->length) {
307
        int tag = get_be16(pb);
308
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
309

    
310
        switch (tag) {
311
        case 0x3B03:
312
            get_buffer(pb, mxf->content_storage_uid, 16);
313
            break;
314
        case 0x3B09:
315
            get_buffer(pb, mxf->operational_pattern_ul, 16);
316
            break;
317
        case 0x3B0A:
318
            mxf->essence_containers_uls_count = get_be32(pb);
319
            if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
320
                return -1;
321
            mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
322
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
323
            get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
324
            break;
325
        default:
326
            url_fskip(pb, size);
327
        }
328
        bytes_read += size + 4;
329
    }
330
    return 0;
331
}
332

    
333
static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
334
{
335
    ByteIOContext *pb = &mxf->fc->pb;
336
    int bytes_read = 0;
337

    
338
    while (bytes_read < klv->length) {
339
        int tag = get_be16(pb);
340
        int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
341

    
342
        dprintf("tag 0x%04X, size %d\n", tag, size);
343
        switch (tag) {
344
        case 0x1901:
345
            mxf->packages_count = get_be32(pb);
346
            if (mxf->packages_count >= UINT_MAX / sizeof(UID))
347
                return -1;
348
            mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
349
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
350
            get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
351
            break;
352
        case 0x1902:
353
            mxf->essence_container_data_sets_count = get_be32(pb);
354
            if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
355
                return -1;
356
            mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
357
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
358
            get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
359
            break;
360
        default:
361
            url_fskip(pb, size);
362
        }
363
        bytes_read += size + 4;
364
    }
365
    return 0;
366
}
367

    
368
#define MXF_READ_LOCAL_TAGS_START(typename, ctype, name) \
369
    ByteIOContext *pb = &mxf->fc->pb;\
370
    ctype *name = av_mallocz(sizeof(*name));\
371
    int bytes_read = 0;\
372
\
373
    while (bytes_read < klv->length) {\
374
        int tag = get_be16(pb);\
375
        int size = get_be16(pb); /* KLV specified by 0x53 */\
376
\
377
        bytes_read += size + 4;\
378
        dprintf("tag 0x%04X, size %d\n", tag, size);\
379
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */\
380
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);\
381
            continue;\
382
        }\
383
        switch (tag) {\
384
        case 0x3C0A:\
385
            get_buffer(pb, name->uid, 16);\
386
            break;
387

    
388
#define MXF_READ_LOCAL_TAGS_STOP(typename, ctype, name)\
389
        default:\
390
            url_fskip(pb, size);\
391
        }\
392
    }\
393
    name->type = typename;\
394
    return mxf_add_metadata_set(mxf, name);
395

    
396
static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
397
{
398
MXF_READ_LOCAL_TAGS_START(SourceClip, MXFStructuralComponent, source_clip)
399
        case 0x0202:
400
            source_clip->duration = get_be64(pb);
401
            break;
402
        case 0x1201:
403
            source_clip->start_position = get_be64(pb);
404
            break;
405
        case 0x1101:
406
            /* UMID, only get last 16 bytes */
407
            url_fskip(pb, 16);
408
            get_buffer(pb, source_clip->source_package_uid, 16);
409
            break;
410
        case 0x1102:
411
            source_clip->source_track_id = get_be32(pb);
412
            break;
413
MXF_READ_LOCAL_TAGS_STOP(SourceClip, MXFStructuralComponent, source_clip)
414
}
415

    
416
static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
417
{
418
MXF_READ_LOCAL_TAGS_START(MaterialPackage, MXFPackage, package)
419
        case 0x4403:
420
            package->tracks_count = get_be32(pb);
421
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
422
                return -1;
423
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
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
MXF_READ_LOCAL_TAGS_STOP(MaterialPackage, MXFPackage, package)
428
}
429

    
430
static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
431
{
432
MXF_READ_LOCAL_TAGS_START(Track, MXFTrack, track)
433
        case 0x4801:
434
            track->track_id = get_be32(pb);
435
            break;
436
        case 0x4804:
437
            get_buffer(pb, track->track_number, 4);
438
            break;
439
        case 0x4B01:
440
            track->edit_rate.den = get_be32(pb);
441
            track->edit_rate.num = get_be32(pb);
442
            break;
443
        case 0x4803:
444
            get_buffer(pb, track->sequence_ref, 16);
445
            break;
446
MXF_READ_LOCAL_TAGS_STOP(Track, MXFTrack, track)
447
}
448

    
449
static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
450
{
451
MXF_READ_LOCAL_TAGS_START(Sequence, MXFSequence, sequence)
452
        case 0x0202:
453
            sequence->duration = get_be64(pb);
454
            break;
455
        case 0x0201:
456
            get_buffer(pb, sequence->data_definition_ul, 16);
457
            break;
458
        case 0x1001:
459
            sequence->structural_components_count = get_be32(pb);
460
            if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
461
                return -1;
462
            sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
463
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
464
            get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
465
            break;
466
MXF_READ_LOCAL_TAGS_STOP(Sequence, MXFSequence, sequence)
467
}
468

    
469
static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
470
{
471
MXF_READ_LOCAL_TAGS_START(SourcePackage, MXFPackage, package)
472
        case 0x4403:
473
            package->tracks_count = get_be32(pb);
474
            if (package->tracks_count >= UINT_MAX / sizeof(UID))
475
                return -1;
476
            package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
477
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
478
            get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
479
            break;
480
        case 0x4401:
481
            /* UMID, only get last 16 bytes */
482
            url_fskip(pb, 16);
483
            get_buffer(pb, package->package_uid, 16);
484
            break;
485
        case 0x4701:
486
            get_buffer(pb, package->descriptor_ref, 16);
487
            break;
488
MXF_READ_LOCAL_TAGS_STOP(SourcePackage, MXFPackage, package)
489
}
490

    
491
static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
492
{
493
MXF_READ_LOCAL_TAGS_START(MultipleDescriptor, MXFDescriptor, descriptor)
494
        case 0x3F01:
495
            descriptor->sub_descriptors_count = get_be32(pb);
496
            if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
497
                return -1;
498
            descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
499
            url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
500
            get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
501
            break;
502
MXF_READ_LOCAL_TAGS_STOP(MultipleDescriptor, MXFDescriptor, descriptor)
503
}
504

    
505
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
506
{
507
    int code;
508

    
509
    do {
510
        code = get_byte(pb);
511
        dprintf("pixel layout: code 0x%x\n", code);
512
        switch (code) {
513
        case 0x52: /* R */
514
            descriptor->bits_per_sample += get_byte(pb);
515
            break;
516
        case 0x47: /* G */
517
            descriptor->bits_per_sample += get_byte(pb);
518
            break;
519
        case 0x42: /* B */
520
            descriptor->bits_per_sample += get_byte(pb);
521
            break;
522
        default:
523
            get_byte(pb);
524
        }
525
    } while (code != 0); /* SMPTE 377M E.2.46 */
526
}
527

    
528
static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
529
{
530
MXF_READ_LOCAL_TAGS_START(Descriptor, MXFDescriptor, descriptor)
531
        case 0x3004:
532
            get_buffer(pb, descriptor->essence_container_ul, 16);
533
            break;
534
        case 0x3006:
535
            descriptor->linked_track_id = get_be32(pb);
536
            break;
537
        case 0x3201: /* PictureEssenceCoding */
538
            get_buffer(pb, descriptor->essence_codec_ul, 16);
539
            break;
540
        case 0x3203:
541
            descriptor->width = get_be32(pb);
542
            break;
543
        case 0x3202:
544
            descriptor->height = get_be32(pb);
545
            break;
546
        case 0x320E:
547
            descriptor->aspect_ratio.num = get_be32(pb);
548
            descriptor->aspect_ratio.den = get_be32(pb);
549
            break;
550
        case 0x3D03:
551
            descriptor->sample_rate.num = get_be32(pb);
552
            descriptor->sample_rate.den = get_be32(pb);
553
            break;
554
        case 0x3D06: /* SoundEssenceCompression */
555
            get_buffer(pb, descriptor->essence_codec_ul, 16);
556
            break;
557
        case 0x3D07:
558
            descriptor->channels = get_be32(pb);
559
            break;
560
        case 0x3D01:
561
            descriptor->bits_per_sample = get_be32(pb);
562
            break;
563
        case 0x3401:
564
            mxf_read_metadata_pixel_layout(pb, descriptor);
565
            break;
566
        case 0x8201: /* Private tag used by SONY C0023S01.mxf */
567
            descriptor->extradata = av_malloc(size);
568
            descriptor->extradata_size = size;
569
            get_buffer(pb, descriptor->extradata, size);
570
            break;
571
MXF_READ_LOCAL_TAGS_STOP(Descriptor, MXFDescriptor, descriptor)
572
}
573

    
574
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
575
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
576
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
577
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
578
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
579
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
580
};
581

    
582
static const MXFCodecUL mxf_codec_uls[] = {
583
    /* PictureEssenceCoding */
584
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
585
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
586
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
587
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
588
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
589
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
590
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
591
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
592
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
593
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
594
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
595
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
596
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
597
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
598
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
599
    /* SoundEssenceCompression */
600
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
601
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
602
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 },  CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
603
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
604
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   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 },        CODEC_ID_AC3, Frame },
606
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
607
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
608
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       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 }, 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 }, 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 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
615
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
616
};
617

    
618
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
619
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
620
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
621
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
622
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
623
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 },        CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
624
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
625
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */
626
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
627
};
628

    
629
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
630
{
631
    while (uls->id != CODEC_ID_NONE) {
632
        if(!memcmp(uls->uid, *uid, 16))
633
            break;
634
        uls++;
635
    }
636
    return uls;
637
}
638

    
639
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
640
{
641
    while (uls->type != CODEC_TYPE_DATA) {
642
        if(!memcmp(uls->uid, *uid, 16))
643
            break;
644
        uls++;
645
    }
646
    return uls->type;
647
}
648

    
649
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
650
{
651
    int i;
652

    
653
    if (!strong_ref)
654
        return NULL;
655
    for (i = 0; i < mxf->metadata_sets_count; i++) {
656
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
657
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
658
            return mxf->metadata_sets[i];
659
        }
660
    }
661
    return NULL;
662
}
663

    
664
static int mxf_parse_structural_metadata(MXFContext *mxf)
665
{
666
    MXFPackage *material_package = NULL;
667
    MXFPackage *temp_package = NULL;
668
    int i, j, k;
669

    
670
    dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
671
    /* TODO: handle multiple material packages (OP3x) */
672
    for (i = 0; i < mxf->packages_count; i++) {
673
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
674
        if (material_package) break;
675
    }
676
    if (!material_package) {
677
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
678
        return -1;
679
    }
680

    
681
    for (i = 0; i < material_package->tracks_count; i++) {
682
        MXFPackage *source_package = NULL;
683
        MXFTrack *material_track = NULL;
684
        MXFTrack *source_track = NULL;
685
        MXFTrack *temp_track = NULL;
686
        MXFDescriptor *descriptor = NULL;
687
        MXFStructuralComponent *component = NULL;
688
        const MXFCodecUL *codec_ul = NULL;
689
        const MXFCodecUL *container_ul = NULL;
690
        AVStream *st;
691

    
692
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
693
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
694
            continue;
695
        }
696

    
697
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
698
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
699
            return -1;
700
        }
701

    
702
        /* TODO: handle multiple source clips */
703
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
704
            /* TODO: handle timecode component */
705
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
706
            if (!component)
707
                continue;
708

    
709
            for (k = 0; k < mxf->packages_count; k++) {
710
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
711
                if (!temp_package)
712
                    continue;
713
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
714
                    source_package = temp_package;
715
                    break;
716
                }
717
            }
718
            if (!source_package) {
719
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
720
                break;
721
            }
722
            for (k = 0; k < source_package->tracks_count; k++) {
723
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
724
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
725
                    return -1;
726
                }
727
                if (temp_track->track_id == component->source_track_id) {
728
                    source_track = temp_track;
729
                    break;
730
                }
731
            }
732
            if (!source_track) {
733
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
734
                break;
735
            }
736
        }
737
        if (!source_track)
738
            continue;
739

    
740
        st = av_new_stream(mxf->fc, source_track->track_id);
741
        st->priv_data = source_track;
742
        st->duration = component->duration;
743
        if (st->duration == -1)
744
            st->duration = AV_NOPTS_VALUE;
745
        st->start_time = component->start_position;
746
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
747

    
748
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
749
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
750
            return -1;
751
        }
752

    
753
#ifdef DEBUG
754
        PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
755
#endif
756
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
757

    
758
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
759
        if (source_package->descriptor) {
760
            if (source_package->descriptor->type == MultipleDescriptor) {
761
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
762
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
763

    
764
                    if (!sub_descriptor) {
765
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
766
                        continue;
767
                    }
768
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
769
                        descriptor = sub_descriptor;
770
                        break;
771
                    }
772
                }
773
            } else if (source_package->descriptor->type == Descriptor)
774
                descriptor = source_package->descriptor;
775
        }
776
        if (!descriptor) {
777
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
778
            continue;
779
        }
780
#ifdef DEBUG
781
        PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
782
        PRINT_KEY("essence container ul", descriptor->essence_container_ul);
783
#endif
784
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
785
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
786
        st->codec->codec_id = codec_ul->id;
787
        if (descriptor->extradata) {
788
            st->codec->extradata = descriptor->extradata;
789
            st->codec->extradata_size = descriptor->extradata_size;
790
        }
791
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
792
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
793
            if (st->codec->codec_id == CODEC_ID_NONE)
794
                st->codec->codec_id = container_ul->id;
795
            st->codec->width = descriptor->width;
796
            st->codec->height = descriptor->height;
797
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
798
            st->need_parsing = 2; /* only parse headers */
799
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
800
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
801
            if (st->codec->codec_id == CODEC_ID_NONE)
802
                st->codec->codec_id = container_ul->id;
803
            st->codec->channels = descriptor->channels;
804
            st->codec->bits_per_sample = descriptor->bits_per_sample;
805
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
806
            /* TODO: implement CODEC_ID_RAWAUDIO */
807
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
808
                if (descriptor->bits_per_sample == 24)
809
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
810
                else if (descriptor->bits_per_sample == 32)
811
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
812
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
813
                if (descriptor->bits_per_sample == 24)
814
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
815
                else if (descriptor->bits_per_sample == 32)
816
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
817
                if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
818
                    st->codec->channels = 8; /* force channels to 8 */
819
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
820
                st->need_parsing = 1;
821
            }
822
        }
823
        if (container_ul && container_ul->wrapping == Clip) {
824
            dprintf("stream %d: clip wrapped essence\n", st->index);
825
            st->need_parsing = 1;
826
        }
827
    }
828
    return 0;
829
}
830

    
831
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
832
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
833
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
834
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
835
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
836
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
837
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
838
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
839
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
840
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
841
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
842
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
843
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
844
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
845
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
846
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
847
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
848
};
849

    
850
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
851
{
852
    int i, b;
853
    for (i = 0; i < size && !url_feof(pb); i++) {
854
        b = get_byte(pb);
855
        if (b == key[0])
856
            i = 0;
857
        else if (b != key[i])
858
            i = -1;
859
    }
860
    return i == size;
861
}
862

    
863
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
864
{
865
    MXFContext *mxf = s->priv_data;
866
    KLVPacket klv;
867

    
868
    mxf->sync_key = mxf_essence_element_key;
869
    if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
870
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
871
        return -1;
872
    }
873
    url_fseek(&s->pb, -14, SEEK_CUR);
874
    mxf->fc = s;
875
    while (!url_feof(&s->pb)) {
876
        const MXFMetadataReadTableEntry *function;
877

    
878
        if (klv_read_packet(&klv, &s->pb) < 0) {
879
            av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
880
            return -1;
881
        }
882
#ifdef DEBUG
883
        PRINT_KEY("read header", klv.key);
884
#endif
885
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
886
            /* FIXME avoid seek */
887
            url_fseek(&s->pb, klv.offset, SEEK_SET);
888
            break;
889
        }
890

    
891
        for (function = mxf_metadata_read_table; function->read; function++) {
892
            if (IS_KLV_KEY(klv.key, function->key)) {
893
                if (function->read(mxf, &klv) < 0) {
894
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
895
                    return -1;
896
                }
897
                break;
898
            }
899
        }
900
        if (!function->read)
901
            url_fskip(&s->pb, klv.length);
902
    }
903
    return mxf_parse_structural_metadata(mxf);
904
}
905

    
906
static int mxf_read_close(AVFormatContext *s)
907
{
908
    MXFContext *mxf = s->priv_data;
909
    int i;
910

    
911
    av_freep(&mxf->packages_refs);
912
    av_freep(&mxf->essence_container_data_sets_refs);
913
    av_freep(&mxf->essence_containers_uls);
914
    for (i = 0; i < mxf->metadata_sets_count; i++) {
915
        switch (mxf->metadata_sets[i]->type) {
916
        case MultipleDescriptor:
917
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
918
            break;
919
        case Sequence:
920
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
921
            break;
922
        case SourcePackage:
923
        case MaterialPackage:
924
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
925
            break;
926
        default:
927
            break;
928
        }
929
        av_freep(&mxf->metadata_sets[i]);
930
    }
931
    av_freep(&mxf->metadata_sets);
932
    return 0;
933
}
934

    
935
static int mxf_probe(AVProbeData *p) {
936
    uint8_t *bufp = p->buf;
937
    uint8_t *end = p->buf + p->buf_size;
938

    
939
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
940
        return 0;
941

    
942
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
943
    end -= sizeof(mxf_header_partition_pack_key);
944
    for (; bufp < end; bufp++) {
945
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
946
            return AVPROBE_SCORE_MAX;
947
    }
948
    return 0;
949
}
950

    
951
/* rudimentary binary seek */
952
/* XXX: use MXF Index */
953
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
954
{
955
    MXFContext *mxf = s->priv_data;
956
    AVStream *st = s->streams[stream_index];
957
    int64_t seconds;
958

    
959
    if (!s->bit_rate)
960
        return -1;
961
    if (sample_time < 0)
962
        sample_time = 0;
963
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
964
    url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
965
    if (!mxf_read_sync(&s->pb, mxf->sync_key, 12))
966
        return -1;
967

    
968
    /* found KLV key */
969
    url_fseek(&s->pb, -12, SEEK_CUR);
970
    av_update_cur_dts(s, st, sample_time);
971
    return 0;
972
}
973

    
974
AVInputFormat mxf_demuxer = {
975
    "mxf",
976
    "MXF format",
977
    sizeof(MXFContext),
978
    mxf_probe,
979
    mxf_read_header,
980
    mxf_read_packet,
981
    mxf_read_close,
982
    mxf_read_seek,
983
};