report error when local tag has 0 size
[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,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
681     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
682     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
683     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
684     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
685     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
686     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
687     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
688     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
689     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
690     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
691     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
692     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
693     /* SoundEssenceCompression */
694     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
695     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
696     { { 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 */
697     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
698     { { 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 */
699     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
700     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
701   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
702     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
703 };
704
705 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
706     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
707     { { 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 */
708     { { 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 */
709     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
710 };
711
712 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
713     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
714     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
715     { { 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 */
716     { { 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 */
717     { { 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 */
718     { { 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 */
719     { { 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 */
720     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
721 };
722
723 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
724 {
725     while (uls->id != CODEC_ID_NONE) {
726         if(!memcmp(uls->uid, *uid, 16))
727             break;
728         uls++;
729     }
730     return uls;
731 }
732
733 static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
734 {
735     while (uls->type != CODEC_TYPE_DATA) {
736         if(!memcmp(uls->uid, *uid, 16))
737             break;
738         uls++;
739     }
740     return uls->type;
741 }
742
743 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref)
744 {
745     int i;
746
747     if (!strong_ref)
748         return NULL;
749     for (i = 0; i < mxf->metadata_sets_count; i++) {
750         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16)) {
751             return mxf->metadata_sets[i];
752         }
753     }
754     return NULL;
755 }
756
757 static int mxf_parse_structural_metadata(MXFContext *mxf)
758 {
759     MXFPackage *material_package = NULL;
760     MXFPackage *source_package = NULL;
761     MXFPackage *temp_package = NULL;
762     int i, j, k;
763
764     dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
765     /* TODO: handle multiple material packages (OP3x) */
766     for (i = 0; i < mxf->packages_count; i++) {
767         if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i]))) {
768             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve package strong ref\n");
769             return -1;
770         }
771         if (temp_package->type == MaterialPackage) {
772             material_package = temp_package;
773             break;
774         }
775     }
776     if (!material_package) {
777         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
778         return -1;
779     }
780
781     for (i = 0; i < material_package->tracks_count; i++) {
782         MXFTrack *material_track = NULL;
783         MXFTrack *source_track = NULL;
784         MXFTrack *temp_track = NULL;
785         MXFDescriptor *descriptor = NULL;
786         MXFStructuralComponent *component = NULL;
787         const MXFCodecUL *codec_ul = NULL;
788         const MXFCodecUL *container_ul = NULL;
789         AVStream *st;
790
791         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i]))) {
792             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
793             continue;
794         }
795
796         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref))) {
797             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
798             return -1;
799         }
800
801         /* TODO: handle multiple source clips */
802         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
803             /* TODO: handle timecode component */
804             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j]);
805             if (!component || component->type != SourceClip)
806                 continue;
807
808             for (k = 0; k < mxf->packages_count; k++) {
809                 if (!(temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k]))) {
810                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
811                     return -1;
812                 }
813                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
814                     source_package = temp_package;
815                     break;
816                 }
817             }
818             if (!source_package) {
819                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
820                 break;
821             }
822             for (k = 0; k < source_package->tracks_count; k++) {
823                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k]))) {
824                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
825                     return -1;
826                 }
827                 if (temp_track->track_id == component->source_track_id) {
828                     source_track = temp_track;
829                     break;
830                 }
831             }
832             if (!source_track) {
833                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
834                 break;
835             }
836         }
837         if (!source_track)
838             continue;
839
840         st = av_new_stream(mxf->fc, source_track->track_id);
841         st->priv_data = source_track;
842         st->duration = component->duration;
843         if (st->duration == -1)
844             st->duration = AV_NOPTS_VALUE;
845         st->start_time = component->start_position;
846         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
847
848         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref))) {
849             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
850             return -1;
851         }
852
853 #ifdef DEBUG
854         PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
855 #endif
856         st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
857
858         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref);
859         if (source_package->descriptor) {
860             if (source_package->descriptor->type == MultipleDescriptor) {
861                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
862                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j]);
863
864                     if (!sub_descriptor) {
865                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
866                         continue;
867                     }
868                     if (sub_descriptor->linked_track_id == source_track->track_id) {
869                         descriptor = sub_descriptor;
870                         break;
871                     }
872                 }
873             } else
874                 descriptor = source_package->descriptor;
875         }
876         if (!descriptor) {
877             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
878             continue;
879         }
880 #ifdef DEBUG
881         PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
882         PRINT_KEY("essence container ul", descriptor->essence_container_ul);
883 #endif
884         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
885         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
886         st->codec->codec_id = codec_ul->id;
887         if (descriptor->extradata) {
888             st->codec->extradata = descriptor->extradata;
889             st->codec->extradata_size = descriptor->extradata_size;
890         }
891         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
892             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
893             if (st->codec->codec_id == CODEC_ID_NONE)
894                 st->codec->codec_id = container_ul->id;
895             st->codec->width = descriptor->width;
896             st->codec->height = descriptor->height;
897             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
898         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
899             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
900             if (st->codec->codec_id == CODEC_ID_NONE)
901                 st->codec->codec_id = container_ul->id;
902             st->codec->channels = descriptor->channels;
903             st->codec->bits_per_sample = descriptor->bits_per_sample;
904             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
905             /* TODO: implement CODEC_ID_RAWAUDIO */
906             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
907                 if (descriptor->bits_per_sample == 24)
908                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
909                 else if (descriptor->bits_per_sample == 32)
910                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
911             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
912                 if (descriptor->bits_per_sample == 24)
913                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
914                 else if (descriptor->bits_per_sample == 32)
915                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
916                 if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
917                     st->codec->channels = 8; /* force channels to 8 */
918             } else if (st->codec->codec_id == CODEC_ID_MP2) {
919                 st->need_parsing = 1;
920             }
921         }
922         if (container_ul && container_ul->wrapping == Clip) {
923             dprintf("stream %d: clip wrapped essence\n", st->index);
924             st->need_parsing = 1;
925         }
926     }
927     return 0;
928 }
929
930 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
931     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
932     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
933     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
934     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
935     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
936     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
937     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
938     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
939     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
940     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
941     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
942     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
943     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
944     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
945     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
946     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
947 };
948
949 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
950 {
951     int i, b;
952     for (i = 0; i < size && !url_feof(pb); i++) {
953         b = get_byte(pb);
954         if (b == key[0])
955             i = 0;
956         else if (b != key[i])
957             i = -1;
958     }
959     return i == size;
960 }
961
962 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
963 {
964     MXFContext *mxf = s->priv_data;
965     KLVPacket klv;
966
967     if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
968         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
969         return -1;
970     }
971     url_fseek(&s->pb, -14, SEEK_CUR);
972     mxf->fc = s;
973     while (!url_feof(&s->pb)) {
974         const MXFMetadataReadTableEntry *function;
975
976         if (klv_read_packet(&klv, &s->pb) < 0) {
977             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
978             return -1;
979         }
980 #ifdef DEBUG
981         PRINT_KEY("read header", klv.key);
982 #endif
983         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
984             /* FIXME avoid seek */
985             url_fseek(&s->pb, klv.offset, SEEK_SET);
986             break;
987         }
988
989         for (function = mxf_metadata_read_table; function->read; function++) {
990             if (IS_KLV_KEY(klv.key, function->key)) {
991                 if (function->read(mxf, &klv) < 0) {
992                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
993                     return -1;
994                 }
995                 break;
996             }
997         }
998         if (!function->read)
999             url_fskip(&s->pb, klv.length);
1000     }
1001     return mxf_parse_structural_metadata(mxf);
1002 }
1003
1004 static int mxf_read_close(AVFormatContext *s)
1005 {
1006     MXFContext *mxf = s->priv_data;
1007     int i;
1008
1009     av_freep(&mxf->packages_refs);
1010     av_freep(&mxf->essence_container_data_sets_refs);
1011     av_freep(&mxf->essence_containers_uls);
1012     for (i = 0; i < mxf->metadata_sets_count; i++) {
1013         switch (mxf->metadata_sets[i]->type) {
1014         case MultipleDescriptor:
1015             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1016             break;
1017         case Sequence:
1018             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1019             break;
1020         case SourcePackage:
1021         case MaterialPackage:
1022             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1023             break;
1024         default:
1025             break;
1026         }
1027         av_freep(&mxf->metadata_sets[i]);
1028     }
1029     av_freep(&mxf->metadata_sets);
1030     return 0;
1031 }
1032
1033 static int mxf_probe(AVProbeData *p) {
1034     uint8_t *bufp = p->buf;
1035     uint8_t *end = p->buf + p->buf_size;
1036
1037     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1038         return 0;
1039
1040     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1041     end -= sizeof(mxf_header_partition_pack_key);
1042     for (; bufp < end; bufp++) {
1043         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1044             return AVPROBE_SCORE_MAX;
1045     }
1046     return 0;
1047 }
1048
1049 /* rudimentary binary seek */
1050 /* XXX: use MXF Index */
1051 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1052 {
1053     AVStream *st = s->streams[stream_index];
1054     int64_t seconds;
1055
1056     if (!s->bit_rate)
1057         return -1;
1058     if (sample_time < 0)
1059         sample_time = 0;
1060     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1061     url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1062     if (!mxf_read_sync(&s->pb, mxf_essence_element_key, 12))
1063         return -1;
1064
1065     /* found KLV key */
1066     url_fseek(&s->pb, -12, SEEK_CUR);
1067     av_update_cur_dts(s, st, sample_time);
1068     return 0;
1069 }
1070
1071 AVInputFormat mxf_demuxer = {
1072     "mxf",
1073     "MXF format",
1074     sizeof(MXFContext),
1075     mxf_probe,
1076     mxf_read_header,
1077     mxf_read_packet,
1078     mxf_read_close,
1079     mxf_read_seek,
1080 };