Extend mxf_resolve_strong_ref by a type parameter, to avoid modify something
[ffmpeg.git] / libavformat / mxf.c
1 /*
2  * MXF demuxer.
3  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
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 "avformat.h"
49
50 typedef uint8_t UID[16];
51
52 enum MXFMetadataSetType {
53     MaterialPackage,
54     SourcePackage,
55     SourceClip,
56     TimecodeComponent,
57     Sequence,
58     MultipleDescriptor,
59     Descriptor,
60     Track,
61     EssenceContainerData,
62 };
63
64 typedef struct MXFStructuralComponent {
65     UID uid;
66     enum MXFMetadataSetType type;
67     UID source_package_uid;
68     UID data_definition_ul;
69     int64_t duration;
70     int64_t start_position;
71     int source_track_id;
72 } MXFStructuralComponent;
73
74 typedef struct MXFSequence {
75     UID uid;
76     enum MXFMetadataSetType type;
77     UID data_definition_ul;
78     UID *structural_components_refs;
79     int structural_components_count;
80     int64_t duration;
81 } MXFSequence;
82
83 typedef struct MXFTrack {
84     UID uid;
85     enum MXFMetadataSetType type;
86     MXFSequence *sequence; /* mandatory, and only one */
87     UID sequence_ref;
88     int track_id;
89     uint8_t track_number[4];
90     AVRational edit_rate;
91 } MXFTrack;
92
93 typedef struct MXFDescriptor {
94     UID uid;
95     enum MXFMetadataSetType type;
96     UID essence_container_ul;
97     UID essence_codec_ul;
98     AVRational sample_rate;
99     AVRational aspect_ratio;
100     int width;
101     int height;
102     int channels;
103     int bits_per_sample;
104     UID *sub_descriptors_refs;
105     int sub_descriptors_count;
106     int linked_track_id;
107     uint8_t *extradata;
108     int extradata_size;
109 } MXFDescriptor;
110
111 typedef struct MXFPackage {
112     UID uid;
113     enum MXFMetadataSetType type;
114     UID package_uid;
115     UID *tracks_refs;
116     int tracks_count;
117     MXFDescriptor *descriptor; /* only one */
118     UID descriptor_ref;
119 } MXFPackage;
120
121 typedef struct MXFEssenceContainerData {
122     UID uid;
123     enum MXFMetadataSetType type;
124     UID linked_package_uid;
125 } MXFEssenceContainerData;
126
127 typedef struct {
128     UID uid;
129     enum MXFMetadataSetType type;
130 } MXFMetadataSet;
131
132 typedef struct MXFContext {
133     UID *packages_refs;
134     int packages_count;
135     UID *essence_container_data_sets_refs;
136     int essence_container_data_sets_count;
137     UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
138     int essence_containers_uls_count;
139     UID operational_pattern_ul;
140     UID content_storage_uid;
141     MXFMetadataSet **metadata_sets;
142     int metadata_sets_count;
143     AVFormatContext *fc;
144 } MXFContext;
145
146 typedef struct KLVPacket {
147     UID key;
148     offset_t offset;
149     uint64_t length;
150 } KLVPacket;
151
152 enum MXFWrappingScheme {
153     Frame,
154     Clip,
155 };
156
157 typedef struct MXFCodecUL {
158     UID uid;
159     enum CodecID id;
160     enum MXFWrappingScheme wrapping;
161 } MXFCodecUL;
162
163 typedef struct MXFDataDefinitionUL {
164     UID uid;
165     enum CodecType type;
166 } MXFDataDefinitionUL;
167
168 typedef struct MXFMetadataReadTableEntry {
169     const UID key;
170     int (*read)(MXFContext *mxf, KLVPacket *klv);
171 } MXFMetadataReadTableEntry;
172
173 /* partial keys to match */
174 static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
175 static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
176
177 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
178
179 #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, \
180                              (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])
181
182 static int64_t klv_decode_ber_length(ByteIOContext *pb)
183 {
184     int64_t size = 0;
185     uint8_t length = get_byte(pb);
186     int type = length >> 7;
187
188     if (type) { /* long form */
189         int bytes_num = length & 0x7f;
190         /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
191         if (bytes_num > 8)
192             return -1;
193         while (bytes_num--)
194             size = size << 8 | get_byte(pb);
195     } else {
196         size = length & 0x7f;
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     KLVPacket klv;
255
256     while (!url_feof(&s->pb)) {
257         if (klv_read_packet(&klv, &s->pb) < 0) {
258             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
259             return -1;
260         }
261 #ifdef DEBUG
262         PRINT_KEY("read packet", klv.key);
263 #endif
264         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
265             int index = mxf_get_stream_index(s, &klv);
266             if (index < 0) {
267                 av_log(s, AV_LOG_ERROR, "error getting stream index\n");
268                 url_fskip(&s->pb, klv.length);
269                 return -1;
270             }
271             /* check for 8 channels AES3 element */
272             if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
273                 if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
274                     av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
275                     return -1;
276                 }
277             } else
278                 av_get_packet(&s->pb, pkt, klv.length);
279             pkt->stream_index = index;
280             return 0;
281         } else
282             url_fskip(&s->pb, klv.length);
283     }
284     return AVERROR_IO;
285 }
286
287 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
288 {
289     mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
290     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
291     mxf->metadata_sets_count++;
292     return 0;
293 }
294
295 static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
296 {
297     ByteIOContext *pb = &mxf->fc->pb;
298     int bytes_read = 0;
299
300     while (bytes_read < klv->length) {
301         int tag = get_be16(pb);
302         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
303
304         switch (tag) {
305         case 0x3B03:
306             get_buffer(pb, mxf->content_storage_uid, 16);
307             break;
308         case 0x3B09:
309             get_buffer(pb, mxf->operational_pattern_ul, 16);
310             break;
311         case 0x3B0A:
312             mxf->essence_containers_uls_count = get_be32(pb);
313             if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
314                 return -1;
315             mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
316             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
317             get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
318             break;
319         default:
320             url_fskip(pb, size);
321         }
322         bytes_read += size + 4;
323     }
324     return 0;
325 }
326
327 static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
328 {
329     ByteIOContext *pb = &mxf->fc->pb;
330     int bytes_read = 0;
331
332     while (bytes_read < klv->length) {
333         int tag = get_be16(pb);
334         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
335
336         dprintf("tag 0x%04X, size %d\n", tag, size);
337         switch (tag) {
338         case 0x1901:
339             mxf->packages_count = get_be32(pb);
340             if (mxf->packages_count >= UINT_MAX / sizeof(UID))
341                 return -1;
342             mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
343             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
344             get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
345             break;
346         case 0x1902:
347             mxf->essence_container_data_sets_count = get_be32(pb);
348             if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
349                 return -1;
350             mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
351             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
352             get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
353             break;
354         default:
355             url_fskip(pb, size);
356         }
357         bytes_read += size + 4;
358     }
359     return 0;
360 }
361
362 static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
363 {
364     ByteIOContext *pb = &mxf->fc->pb;
365     MXFStructuralComponent *source_clip = av_mallocz(sizeof(*source_clip));
366     int bytes_read = 0;
367
368     while (bytes_read < klv->length) {
369         int tag = get_be16(pb);
370         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
371
372         bytes_read += size + 4;
373         dprintf("tag 0x%04X, size %d\n", tag, size);
374         if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
375             av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
376             continue;
377         }
378         switch (tag) {
379         case 0x3C0A:
380             get_buffer(pb, source_clip->uid, 16);
381             break;
382         case 0x0202:
383             source_clip->duration = get_be64(pb);
384             break;
385         case 0x1201:
386             source_clip->start_position = get_be64(pb);
387             break;
388         case 0x1101:
389             /* UMID, only get last 16 bytes */
390             url_fskip(pb, 16);
391             get_buffer(pb, source_clip->source_package_uid, 16);
392             break;
393         case 0x1102:
394             source_clip->source_track_id = get_be32(pb);
395             break;
396         default:
397             url_fskip(pb, size);
398         }
399     }
400     source_clip->type = SourceClip;
401     return mxf_add_metadata_set(mxf, source_clip);
402 }
403
404 static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
405 {
406     ByteIOContext *pb = &mxf->fc->pb;
407     MXFPackage *package = av_mallocz(sizeof(*package));
408     int bytes_read = 0;
409
410     while (bytes_read < klv->length) {
411         int tag = get_be16(pb);
412         int size = get_be16(pb); /* KLV specified by 0x53 */
413
414         switch (tag) {
415         case 0x3C0A:
416             get_buffer(pb, package->uid, 16);
417             break;
418         case 0x4403:
419             package->tracks_count = get_be32(pb);
420             if (package->tracks_count >= UINT_MAX / sizeof(UID))
421                 return -1;
422             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
423             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
424             get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
425             break;
426         default:
427             url_fskip(pb, size);
428         }
429         bytes_read += size + 4;
430     }
431     package->type = MaterialPackage;
432     return mxf_add_metadata_set(mxf, package);
433 }
434
435 static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
436 {
437     ByteIOContext *pb = &mxf->fc->pb;
438     MXFTrack *track = av_mallocz(sizeof(*track));
439     int bytes_read = 0;
440
441     while (bytes_read < klv->length) {
442         int tag = get_be16(pb);
443         int size = get_be16(pb); /* KLV specified by 0x53 */
444
445         dprintf("tag 0x%04X, size %d\n", tag, size);
446         switch (tag) {
447         case 0x3C0A:
448             get_buffer(pb, track->uid, 16);
449             break;
450         case 0x4801:
451             track->track_id = get_be32(pb);
452             break;
453         case 0x4804:
454             get_buffer(pb, track->track_number, 4);
455             break;
456         case 0x4B01:
457             track->edit_rate.den = get_be32(pb);
458             track->edit_rate.num = get_be32(pb);
459             break;
460         case 0x4803:
461             get_buffer(pb, track->sequence_ref, 16);
462             break;
463         default:
464             url_fskip(pb, size);
465         }
466         bytes_read += size + 4;
467     }
468     track->type = Track;
469     return mxf_add_metadata_set(mxf, track);
470 }
471
472 static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
473 {
474     ByteIOContext *pb = &mxf->fc->pb;
475     MXFSequence *sequence = av_mallocz(sizeof(*sequence));
476     int bytes_read = 0;
477
478     while (bytes_read < klv->length) {
479         int tag = get_be16(pb);
480         int size = get_be16(pb); /* KLV specified by 0x53 */
481
482         dprintf("tag 0x%04X, size %d\n", tag, size);
483         switch (tag) {
484         case 0x3C0A:
485             get_buffer(pb, sequence->uid, 16);
486             break;
487         case 0x0202:
488             sequence->duration = get_be64(pb);
489             break;
490         case 0x0201:
491             get_buffer(pb, sequence->data_definition_ul, 16);
492             break;
493         case 0x1001:
494             sequence->structural_components_count = get_be32(pb);
495             if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
496                 return -1;
497             sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
498             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
499             get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
500             break;
501         default:
502             url_fskip(pb, size);
503         }
504         bytes_read += size + 4;
505     }
506     sequence->type = Sequence;
507     return mxf_add_metadata_set(mxf, sequence);
508 }
509
510 static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
511 {
512     ByteIOContext *pb = &mxf->fc->pb;
513     MXFPackage *package = av_mallocz(sizeof(*package));
514     int bytes_read = 0;
515
516     while (bytes_read < klv->length) {
517         int tag = get_be16(pb);
518         int size = get_be16(pb); /* KLV specified by 0x53 */
519
520         dprintf("tag 0x%04X, size %d\n", tag, size);
521         switch (tag) {
522         case 0x3C0A:
523             get_buffer(pb, package->uid, 16);
524             break;
525         case 0x4403:
526             package->tracks_count = get_be32(pb);
527             if (package->tracks_count >= UINT_MAX / sizeof(UID))
528                 return -1;
529             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
530             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
531             get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
532             break;
533         case 0x4401:
534             /* UMID, only get last 16 bytes */
535             url_fskip(pb, 16);
536             get_buffer(pb, package->package_uid, 16);
537             break;
538         case 0x4701:
539             get_buffer(pb, package->descriptor_ref, 16);
540             break;
541         default:
542             url_fskip(pb, size);
543         }
544         bytes_read += size + 4;
545     }
546     package->type = SourcePackage;
547     return mxf_add_metadata_set(mxf, package);
548 }
549
550 static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
551 {
552     ByteIOContext *pb = &mxf->fc->pb;
553     MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
554     int bytes_read = 0;
555
556     while (bytes_read < klv->length) {
557         int tag = get_be16(pb);
558         int size = get_be16(pb); /* KLV specified by 0x53 */
559
560         dprintf("tag 0x%04X, size %d\n", tag, size);
561         switch (tag) {
562         case 0x3C0A:
563             get_buffer(pb, descriptor->uid, 16);
564             break;
565         case 0x3F01:
566             descriptor->sub_descriptors_count = get_be32(pb);
567             if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
568                 return -1;
569             descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
570             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
571             get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
572             break;
573         default:
574             url_fskip(pb, size);
575         }
576         bytes_read += size + 4;
577     }
578     descriptor->type = MultipleDescriptor;
579     return mxf_add_metadata_set(mxf, descriptor);
580 }
581
582 static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
583 {
584     int code;
585
586     do {
587         code = get_byte(pb);
588         dprintf("pixel layout: code 0x%x\n", code);
589         switch (code) {
590         case 0x52: /* R */
591             descriptor->bits_per_sample += get_byte(pb);
592             break;
593         case 0x47: /* G */
594             descriptor->bits_per_sample += get_byte(pb);
595             break;
596         case 0x42: /* B */
597             descriptor->bits_per_sample += get_byte(pb);
598             break;
599         default:
600             get_byte(pb);
601         }
602     } while (code != 0); /* SMPTE 377M E.2.46 */
603 }
604
605 static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
606 {
607     ByteIOContext *pb = &mxf->fc->pb;
608     MXFDescriptor *descriptor = av_mallocz(sizeof(*descriptor));
609     int bytes_read = 0;
610
611     while (bytes_read < klv->length) {
612         int tag = get_be16(pb);
613         int size = get_be16(pb); /* KLV specified by 0x53 */
614
615         dprintf("tag 0x%04X, size %d\n", tag, size);
616         switch (tag) {
617         case 0x3C0A:
618             get_buffer(pb, descriptor->uid, 16);
619             break;
620         case 0x3004:
621             get_buffer(pb, descriptor->essence_container_ul, 16);
622             break;
623         case 0x3006:
624             descriptor->linked_track_id = get_be32(pb);
625             break;
626         case 0x3201: /* PictureEssenceCoding */
627             get_buffer(pb, descriptor->essence_codec_ul, 16);
628             break;
629         case 0x3203:
630             descriptor->width = get_be32(pb);
631             break;
632         case 0x3202:
633             descriptor->height = get_be32(pb);
634             break;
635         case 0x320E:
636             descriptor->aspect_ratio.num = get_be32(pb);
637             descriptor->aspect_ratio.den = get_be32(pb);
638             break;
639         case 0x3D03:
640             descriptor->sample_rate.num = get_be32(pb);
641             descriptor->sample_rate.den = get_be32(pb);
642             break;
643         case 0x3D06: /* SoundEssenceCompression */
644             get_buffer(pb, descriptor->essence_codec_ul, 16);
645             break;
646         case 0x3D07:
647             descriptor->channels = get_be32(pb);
648             break;
649         case 0x3D01:
650             descriptor->bits_per_sample = get_be32(pb);
651             break;
652         case 0x3401:
653             mxf_read_metadata_pixel_layout(pb, descriptor);
654             break;
655         case 0x8201: /* Private tag used by SONY C0023S01.mxf */
656             descriptor->extradata = av_malloc(size);
657             descriptor->extradata_size = size;
658             get_buffer(pb, descriptor->extradata, size);
659             break;
660         default:
661             url_fskip(pb, size);
662         }
663         bytes_read += size + 4;
664     }
665     descriptor->type = Descriptor;
666     return mxf_add_metadata_set(mxf, descriptor);
667 }
668
669 /* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
670 static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
671     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
672     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
673     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
674     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
675 };
676
677 static const MXFCodecUL mxf_codec_uls[] = {
678     /* PictureEssenceCoding */
679     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
680     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
681     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
682     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
683     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
684     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
685     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
686     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
687     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
688     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
689     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
690     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
691     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
692     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
693     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
694     /* SoundEssenceCompression */
695     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
696     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
697     { { 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 */
698     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
699     { { 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 */
700     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
701     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
702   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
703     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
704 };
705
706 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
707     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
708     { { 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 */
709     { { 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 */
710     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
711 };
712
713 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
714     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
715     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
716     { { 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 */
717     { { 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 */
718     { { 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 */
719     { { 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 */
720     { { 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 */
721     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
722 };
723
724 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
725 {
726     while (uls->id != CODEC_ID_NONE) {
727         if(!memcmp(uls->uid, *uid, 16))
728             break;
729         uls++;
730     }
731     return uls;
732 }
733
734 static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
735 {
736     while (uls->type != CODEC_TYPE_DATA) {
737         if(!memcmp(uls->uid, *uid, 16))
738             break;
739         uls++;
740     }
741     return uls->type;
742 }
743
744 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
745 {
746     int i;
747
748     if (!strong_ref)
749         return NULL;
750     for (i = 0; i < mxf->metadata_sets_count; i++) {
751         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
752             mxf->metadata_sets[i]->type == type) {
753             return mxf->metadata_sets[i];
754         }
755     }
756     return NULL;
757 }
758
759 static int mxf_parse_structural_metadata(MXFContext *mxf)
760 {
761     MXFPackage *material_package = NULL;
762     MXFPackage *temp_package = NULL;
763     int i, j, k;
764
765     dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
766     /* TODO: handle multiple material packages (OP3x) */
767     for (i = 0; i < mxf->packages_count; i++) {
768         material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
769         if (material_package) break;
770     }
771     if (!material_package) {
772         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
773         return -1;
774     }
775
776     for (i = 0; i < material_package->tracks_count; i++) {
777         MXFPackage *source_package = NULL;
778         MXFTrack *material_track = NULL;
779         MXFTrack *source_track = NULL;
780         MXFTrack *temp_track = NULL;
781         MXFDescriptor *descriptor = NULL;
782         MXFStructuralComponent *component = NULL;
783         const MXFCodecUL *codec_ul = NULL;
784         const MXFCodecUL *container_ul = NULL;
785         AVStream *st;
786
787         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
788             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
789             continue;
790         }
791
792         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
793             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
794             return -1;
795         }
796
797         /* TODO: handle multiple source clips */
798         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
799             /* TODO: handle timecode component */
800             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
801             if (!component)
802                 continue;
803
804             for (k = 0; k < mxf->packages_count; k++) {
805                 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
806                 if (!temp_package)
807                     continue;
808                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
809                     source_package = temp_package;
810                     break;
811                 }
812             }
813             if (!source_package) {
814                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
815                 break;
816             }
817             for (k = 0; k < source_package->tracks_count; k++) {
818                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
819                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
820                     return -1;
821                 }
822                 if (temp_track->track_id == component->source_track_id) {
823                     source_track = temp_track;
824                     break;
825                 }
826             }
827             if (!source_track) {
828                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
829                 break;
830             }
831         }
832         if (!source_track)
833             continue;
834
835         st = av_new_stream(mxf->fc, source_track->track_id);
836         st->priv_data = source_track;
837         st->duration = component->duration;
838         if (st->duration == -1)
839             st->duration = AV_NOPTS_VALUE;
840         st->start_time = component->start_position;
841         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
842
843         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
844             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
845             return -1;
846         }
847
848 #ifdef DEBUG
849         PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
850 #endif
851         st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
852
853         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, Descriptor);
854         if (source_package->descriptor) {
855             if (source_package->descriptor->type == MultipleDescriptor) {
856                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
857                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
858
859                     if (!sub_descriptor) {
860                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
861                         continue;
862                     }
863                     if (sub_descriptor->linked_track_id == source_track->track_id) {
864                         descriptor = sub_descriptor;
865                         break;
866                     }
867                 }
868             } else
869                 descriptor = source_package->descriptor;
870         }
871         if (!descriptor) {
872             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
873             continue;
874         }
875 #ifdef DEBUG
876         PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
877         PRINT_KEY("essence container ul", descriptor->essence_container_ul);
878 #endif
879         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
880         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
881         st->codec->codec_id = codec_ul->id;
882         if (descriptor->extradata) {
883             st->codec->extradata = descriptor->extradata;
884             st->codec->extradata_size = descriptor->extradata_size;
885         }
886         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
887             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
888             if (st->codec->codec_id == CODEC_ID_NONE)
889                 st->codec->codec_id = container_ul->id;
890             st->codec->width = descriptor->width;
891             st->codec->height = descriptor->height;
892             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
893             st->need_parsing = 2; /* only parse headers */
894         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
895             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
896             if (st->codec->codec_id == CODEC_ID_NONE)
897                 st->codec->codec_id = container_ul->id;
898             st->codec->channels = descriptor->channels;
899             st->codec->bits_per_sample = descriptor->bits_per_sample;
900             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
901             /* TODO: implement CODEC_ID_RAWAUDIO */
902             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
903                 if (descriptor->bits_per_sample == 24)
904                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
905                 else if (descriptor->bits_per_sample == 32)
906                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
907             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
908                 if (descriptor->bits_per_sample == 24)
909                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
910                 else if (descriptor->bits_per_sample == 32)
911                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
912                 if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
913                     st->codec->channels = 8; /* force channels to 8 */
914             } else if (st->codec->codec_id == CODEC_ID_MP2) {
915                 st->need_parsing = 1;
916             }
917         }
918         if (container_ul && container_ul->wrapping == Clip) {
919             dprintf("stream %d: clip wrapped essence\n", st->index);
920             st->need_parsing = 1;
921         }
922     }
923     return 0;
924 }
925
926 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
927     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
928     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
929     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
930     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
931     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
932     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
933     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
934     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
935     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
936     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
937     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
938     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
939     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
940     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
941     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
942     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
943 };
944
945 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
946 {
947     int i, b;
948     for (i = 0; i < size && !url_feof(pb); i++) {
949         b = get_byte(pb);
950         if (b == key[0])
951             i = 0;
952         else if (b != key[i])
953             i = -1;
954     }
955     return i == size;
956 }
957
958 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
959 {
960     MXFContext *mxf = s->priv_data;
961     KLVPacket klv;
962
963     if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
964         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
965         return -1;
966     }
967     url_fseek(&s->pb, -14, SEEK_CUR);
968     mxf->fc = s;
969     while (!url_feof(&s->pb)) {
970         const MXFMetadataReadTableEntry *function;
971
972         if (klv_read_packet(&klv, &s->pb) < 0) {
973             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
974             return -1;
975         }
976 #ifdef DEBUG
977         PRINT_KEY("read header", klv.key);
978 #endif
979         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
980             /* FIXME avoid seek */
981             url_fseek(&s->pb, klv.offset, SEEK_SET);
982             break;
983         }
984
985         for (function = mxf_metadata_read_table; function->read; function++) {
986             if (IS_KLV_KEY(klv.key, function->key)) {
987                 if (function->read(mxf, &klv) < 0) {
988                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
989                     return -1;
990                 }
991                 break;
992             }
993         }
994         if (!function->read)
995             url_fskip(&s->pb, klv.length);
996     }
997     return mxf_parse_structural_metadata(mxf);
998 }
999
1000 static int mxf_read_close(AVFormatContext *s)
1001 {
1002     MXFContext *mxf = s->priv_data;
1003     int i;
1004
1005     av_freep(&mxf->packages_refs);
1006     av_freep(&mxf->essence_container_data_sets_refs);
1007     av_freep(&mxf->essence_containers_uls);
1008     for (i = 0; i < mxf->metadata_sets_count; i++) {
1009         switch (mxf->metadata_sets[i]->type) {
1010         case MultipleDescriptor:
1011             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1012             break;
1013         case Sequence:
1014             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1015             break;
1016         case SourcePackage:
1017         case MaterialPackage:
1018             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1019             break;
1020         default:
1021             break;
1022         }
1023         av_freep(&mxf->metadata_sets[i]);
1024     }
1025     av_freep(&mxf->metadata_sets);
1026     return 0;
1027 }
1028
1029 static int mxf_probe(AVProbeData *p) {
1030     uint8_t *bufp = p->buf;
1031     uint8_t *end = p->buf + p->buf_size;
1032
1033     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1034         return 0;
1035
1036     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1037     end -= sizeof(mxf_header_partition_pack_key);
1038     for (; bufp < end; bufp++) {
1039         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1040             return AVPROBE_SCORE_MAX;
1041     }
1042     return 0;
1043 }
1044
1045 /* rudimentary binary seek */
1046 /* XXX: use MXF Index */
1047 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1048 {
1049     AVStream *st = s->streams[stream_index];
1050     int64_t seconds;
1051
1052     if (!s->bit_rate)
1053         return -1;
1054     if (sample_time < 0)
1055         sample_time = 0;
1056     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1057     url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1058     if (!mxf_read_sync(&s->pb, mxf_essence_element_key, 12))
1059         return -1;
1060
1061     /* found KLV key */
1062     url_fseek(&s->pb, -12, SEEK_CUR);
1063     av_update_cur_dts(s, st, sample_time);
1064     return 0;
1065 }
1066
1067 AVInputFormat mxf_demuxer = {
1068     "mxf",
1069     "MXF format",
1070     sizeof(MXFContext),
1071     mxf_probe,
1072     mxf_read_header,
1073     mxf_read_packet,
1074     mxf_read_close,
1075     mxf_read_seek,
1076 };