Simplify klv_decode_ber_length
[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     AnyType,
54     MaterialPackage,
55     SourcePackage,
56     SourceClip,
57     TimecodeComponent,
58     Sequence,
59     MultipleDescriptor,
60     Descriptor,
61     Track,
62     EssenceContainerData,
63 };
64
65 typedef struct MXFStructuralComponent {
66     UID uid;
67     enum MXFMetadataSetType type;
68     UID source_package_uid;
69     UID data_definition_ul;
70     int64_t duration;
71     int64_t start_position;
72     int source_track_id;
73 } MXFStructuralComponent;
74
75 typedef struct MXFSequence {
76     UID uid;
77     enum MXFMetadataSetType type;
78     UID data_definition_ul;
79     UID *structural_components_refs;
80     int structural_components_count;
81     int64_t duration;
82 } MXFSequence;
83
84 typedef struct MXFTrack {
85     UID uid;
86     enum MXFMetadataSetType type;
87     MXFSequence *sequence; /* mandatory, and only one */
88     UID sequence_ref;
89     int track_id;
90     uint8_t track_number[4];
91     AVRational edit_rate;
92 } MXFTrack;
93
94 typedef struct MXFDescriptor {
95     UID uid;
96     enum MXFMetadataSetType type;
97     UID essence_container_ul;
98     UID essence_codec_ul;
99     AVRational sample_rate;
100     AVRational aspect_ratio;
101     int width;
102     int height;
103     int channels;
104     int bits_per_sample;
105     UID *sub_descriptors_refs;
106     int sub_descriptors_count;
107     int linked_track_id;
108     uint8_t *extradata;
109     int extradata_size;
110 } MXFDescriptor;
111
112 typedef struct MXFPackage {
113     UID uid;
114     enum MXFMetadataSetType type;
115     UID package_uid;
116     UID *tracks_refs;
117     int tracks_count;
118     MXFDescriptor *descriptor; /* only one */
119     UID descriptor_ref;
120 } MXFPackage;
121
122 typedef struct MXFEssenceContainerData {
123     UID uid;
124     enum MXFMetadataSetType type;
125     UID linked_package_uid;
126 } MXFEssenceContainerData;
127
128 typedef struct {
129     UID uid;
130     enum MXFMetadataSetType type;
131 } MXFMetadataSet;
132
133 typedef struct MXFContext {
134     UID *packages_refs;
135     int packages_count;
136     UID *essence_container_data_sets_refs;
137     int essence_container_data_sets_count;
138     UID *essence_containers_uls; /* Universal Labels SMPTE RP224 */
139     int essence_containers_uls_count;
140     UID operational_pattern_ul;
141     UID content_storage_uid;
142     MXFMetadataSet **metadata_sets;
143     int metadata_sets_count;
144     AVFormatContext *fc;
145 } MXFContext;
146
147 typedef struct KLVPacket {
148     UID key;
149     offset_t offset;
150     uint64_t length;
151 } KLVPacket;
152
153 enum MXFWrappingScheme {
154     Frame,
155     Clip,
156 };
157
158 typedef struct MXFCodecUL {
159     UID uid;
160     enum CodecID id;
161     enum MXFWrappingScheme wrapping;
162 } MXFCodecUL;
163
164 typedef struct MXFDataDefinitionUL {
165     UID uid;
166     enum CodecType type;
167 } MXFDataDefinitionUL;
168
169 typedef struct MXFMetadataReadTableEntry {
170     const UID key;
171     int (*read)(MXFContext *mxf, KLVPacket *klv);
172 } MXFMetadataReadTableEntry;
173
174 /* partial keys to match */
175 static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
176 static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
177
178 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
179
180 #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, \
181                              (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])
182
183 static int64_t klv_decode_ber_length(ByteIOContext *pb)
184 {
185     uint64_t size = get_byte(pb);
186     if (size & 0x80) { /* long form */
187         int bytes_num = size & 0x7f;
188         /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
189         if (bytes_num > 8)
190             return -1;
191         size = 0;
192         while (bytes_num--)
193             size = size << 8 | get_byte(pb);
194     }
195     return size;
196 }
197
198 static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
199 {
200     klv->offset = url_ftell(pb);
201     get_buffer(pb, klv->key, 16);
202     klv->length = klv_decode_ber_length(pb);
203     return klv->length == -1 ? -1 : 0;
204 }
205
206 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
207 {
208     int i;
209
210     for (i = 0; i < s->nb_streams; i++) {
211         MXFTrack *track = s->streams[i]->priv_data;
212          /* SMPTE 379M 7.3 */
213         if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
214             return i;
215     }
216     /* return 0 if only one stream, for OP Atom files with 0 as track number */
217     return s->nb_streams == 1 ? 0 : -1;
218 }
219
220 /* XXX: use AVBitStreamFilter */
221 static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
222 {
223     uint8_t buffer[61444];
224     uint8_t *buf_ptr, *end_ptr, *data_ptr;
225
226     if (length > 61444) /* worst case PAL 1920 samples 8 channels */
227         return -1;
228     get_buffer(pb, buffer, length);
229     av_new_packet(pkt, length);
230     data_ptr = pkt->data;
231     end_ptr = buffer + length;
232     buf_ptr = buffer + 4; /* skip SMPTE 331M header */
233     for (; buf_ptr < end_ptr; buf_ptr += 4) {
234         if (st->codec->bits_per_sample == 24) {
235             data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
236             data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
237             data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
238             data_ptr += 3;
239         } else {
240             data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
241             data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
242             data_ptr += 2;
243         }
244     }
245     pkt->size = data_ptr - pkt->data;
246     return 0;
247 }
248
249 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
250 {
251     KLVPacket klv;
252
253     while (!url_feof(&s->pb)) {
254         if (klv_read_packet(&klv, &s->pb) < 0) {
255             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
256             return -1;
257         }
258 #ifdef DEBUG
259         PRINT_KEY("read packet", klv.key);
260 #endif
261         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
262             int index = mxf_get_stream_index(s, &klv);
263             if (index < 0) {
264                 av_log(s, AV_LOG_ERROR, "error getting stream index\n");
265                 url_fskip(&s->pb, klv.length);
266                 return -1;
267             }
268             /* check for 8 channels AES3 element */
269             if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
270                 if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
271                     av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
272                     return -1;
273                 }
274             } else
275                 av_get_packet(&s->pb, pkt, klv.length);
276             pkt->stream_index = index;
277             return 0;
278         } else
279             url_fskip(&s->pb, klv.length);
280     }
281     return AVERROR_IO;
282 }
283
284 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
285 {
286     mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
287     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
288     mxf->metadata_sets_count++;
289     return 0;
290 }
291
292 static int mxf_read_metadata_preface(MXFContext *mxf, KLVPacket *klv)
293 {
294     ByteIOContext *pb = &mxf->fc->pb;
295     int bytes_read = 0;
296
297     while (bytes_read < klv->length) {
298         int tag = get_be16(pb);
299         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
300
301         switch (tag) {
302         case 0x3B03:
303             get_buffer(pb, mxf->content_storage_uid, 16);
304             break;
305         case 0x3B09:
306             get_buffer(pb, mxf->operational_pattern_ul, 16);
307             break;
308         case 0x3B0A:
309             mxf->essence_containers_uls_count = get_be32(pb);
310             if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
311                 return -1;
312             mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
313             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
314             get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
315             break;
316         default:
317             url_fskip(pb, size);
318         }
319         bytes_read += size + 4;
320     }
321     return 0;
322 }
323
324 static int mxf_read_metadata_content_storage(MXFContext *mxf, KLVPacket *klv)
325 {
326     ByteIOContext *pb = &mxf->fc->pb;
327     int bytes_read = 0;
328
329     while (bytes_read < klv->length) {
330         int tag = get_be16(pb);
331         int size = get_be16(pb); /* SMPTE 336M Table 8 KLV specified length, 0x53 */
332
333         dprintf("tag 0x%04X, size %d\n", tag, size);
334         switch (tag) {
335         case 0x1901:
336             mxf->packages_count = get_be32(pb);
337             if (mxf->packages_count >= UINT_MAX / sizeof(UID))
338                 return -1;
339             mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
340             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
341             get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
342             break;
343         case 0x1902:
344             mxf->essence_container_data_sets_count = get_be32(pb);
345             if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
346                 return -1;
347             mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
348             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
349             get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
350             break;
351         default:
352             url_fskip(pb, size);
353         }
354         bytes_read += size + 4;
355     }
356     return 0;
357 }
358
359 #define MXF_READ_LOCAL_TAGS_START(typename, ctype, name) \
360     ByteIOContext *pb = &mxf->fc->pb;\
361     ctype *name = av_mallocz(sizeof(*name));\
362     int bytes_read = 0;\
363 \
364     while (bytes_read < klv->length) {\
365         int tag = get_be16(pb);\
366         int size = get_be16(pb); /* KLV specified by 0x53 */\
367 \
368         bytes_read += size + 4;\
369         dprintf("tag 0x%04X, size %d\n", tag, size);\
370         if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */\
371             av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);\
372             continue;\
373         }\
374         switch (tag) {\
375         case 0x3C0A:\
376             get_buffer(pb, name->uid, 16);\
377             break;
378
379 #define MXF_READ_LOCAL_TAGS_STOP(typename, ctype, name)\
380         default:\
381             url_fskip(pb, size);\
382         }\
383     }\
384     name->type = typename;\
385     return mxf_add_metadata_set(mxf, name);
386
387 static int mxf_read_metadata_source_clip(MXFContext *mxf, KLVPacket *klv)
388 {
389 MXF_READ_LOCAL_TAGS_START(SourceClip, MXFStructuralComponent, source_clip)
390         case 0x0202:
391             source_clip->duration = get_be64(pb);
392             break;
393         case 0x1201:
394             source_clip->start_position = get_be64(pb);
395             break;
396         case 0x1101:
397             /* UMID, only get last 16 bytes */
398             url_fskip(pb, 16);
399             get_buffer(pb, source_clip->source_package_uid, 16);
400             break;
401         case 0x1102:
402             source_clip->source_track_id = get_be32(pb);
403             break;
404 MXF_READ_LOCAL_TAGS_STOP(SourceClip, MXFStructuralComponent, source_clip)
405 }
406
407 static int mxf_read_metadata_material_package(MXFContext *mxf, KLVPacket *klv)
408 {
409 MXF_READ_LOCAL_TAGS_START(MaterialPackage, MXFPackage, package)
410         case 0x4403:
411             package->tracks_count = get_be32(pb);
412             if (package->tracks_count >= UINT_MAX / sizeof(UID))
413                 return -1;
414             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
415             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
416             get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
417             break;
418 MXF_READ_LOCAL_TAGS_STOP(MaterialPackage, MXFPackage, package)
419 }
420
421 static int mxf_read_metadata_track(MXFContext *mxf, KLVPacket *klv)
422 {
423 MXF_READ_LOCAL_TAGS_START(Track, MXFTrack, track)
424         case 0x4801:
425             track->track_id = get_be32(pb);
426             break;
427         case 0x4804:
428             get_buffer(pb, track->track_number, 4);
429             break;
430         case 0x4B01:
431             track->edit_rate.den = get_be32(pb);
432             track->edit_rate.num = get_be32(pb);
433             break;
434         case 0x4803:
435             get_buffer(pb, track->sequence_ref, 16);
436             break;
437 MXF_READ_LOCAL_TAGS_STOP(Track, MXFTrack, track)
438 }
439
440 static int mxf_read_metadata_sequence(MXFContext *mxf, KLVPacket *klv)
441 {
442 MXF_READ_LOCAL_TAGS_START(Sequence, MXFSequence, sequence)
443         case 0x0202:
444             sequence->duration = get_be64(pb);
445             break;
446         case 0x0201:
447             get_buffer(pb, sequence->data_definition_ul, 16);
448             break;
449         case 0x1001:
450             sequence->structural_components_count = get_be32(pb);
451             if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
452                 return -1;
453             sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
454             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
455             get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
456             break;
457 MXF_READ_LOCAL_TAGS_STOP(Sequence, MXFSequence, sequence)
458 }
459
460 static int mxf_read_metadata_source_package(MXFContext *mxf, KLVPacket *klv)
461 {
462 MXF_READ_LOCAL_TAGS_START(SourcePackage, MXFPackage, package)
463         case 0x4403:
464             package->tracks_count = get_be32(pb);
465             if (package->tracks_count >= UINT_MAX / sizeof(UID))
466                 return -1;
467             package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
468             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
469             get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
470             break;
471         case 0x4401:
472             /* UMID, only get last 16 bytes */
473             url_fskip(pb, 16);
474             get_buffer(pb, package->package_uid, 16);
475             break;
476         case 0x4701:
477             get_buffer(pb, package->descriptor_ref, 16);
478             break;
479 MXF_READ_LOCAL_TAGS_STOP(SourcePackage, MXFPackage, package)
480 }
481
482 static int mxf_read_metadata_multiple_descriptor(MXFContext *mxf, KLVPacket *klv)
483 {
484 MXF_READ_LOCAL_TAGS_START(MultipleDescriptor, MXFDescriptor, descriptor)
485         case 0x3F01:
486             descriptor->sub_descriptors_count = get_be32(pb);
487             if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
488                 return -1;
489             descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
490             url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
491             get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
492             break;
493 MXF_READ_LOCAL_TAGS_STOP(MultipleDescriptor, MXFDescriptor, descriptor)
494 }
495
496 static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
497 {
498     int code;
499
500     do {
501         code = get_byte(pb);
502         dprintf("pixel layout: code 0x%x\n", code);
503         switch (code) {
504         case 0x52: /* R */
505             descriptor->bits_per_sample += get_byte(pb);
506             break;
507         case 0x47: /* G */
508             descriptor->bits_per_sample += get_byte(pb);
509             break;
510         case 0x42: /* B */
511             descriptor->bits_per_sample += get_byte(pb);
512             break;
513         default:
514             get_byte(pb);
515         }
516     } while (code != 0); /* SMPTE 377M E.2.46 */
517 }
518
519 static int mxf_read_metadata_generic_descriptor(MXFContext *mxf, KLVPacket *klv)
520 {
521 MXF_READ_LOCAL_TAGS_START(Descriptor, MXFDescriptor, descriptor)
522         case 0x3004:
523             get_buffer(pb, descriptor->essence_container_ul, 16);
524             break;
525         case 0x3006:
526             descriptor->linked_track_id = get_be32(pb);
527             break;
528         case 0x3201: /* PictureEssenceCoding */
529             get_buffer(pb, descriptor->essence_codec_ul, 16);
530             break;
531         case 0x3203:
532             descriptor->width = get_be32(pb);
533             break;
534         case 0x3202:
535             descriptor->height = get_be32(pb);
536             break;
537         case 0x320E:
538             descriptor->aspect_ratio.num = get_be32(pb);
539             descriptor->aspect_ratio.den = get_be32(pb);
540             break;
541         case 0x3D03:
542             descriptor->sample_rate.num = get_be32(pb);
543             descriptor->sample_rate.den = get_be32(pb);
544             break;
545         case 0x3D06: /* SoundEssenceCompression */
546             get_buffer(pb, descriptor->essence_codec_ul, 16);
547             break;
548         case 0x3D07:
549             descriptor->channels = get_be32(pb);
550             break;
551         case 0x3D01:
552             descriptor->bits_per_sample = get_be32(pb);
553             break;
554         case 0x3401:
555             mxf_read_metadata_pixel_layout(pb, descriptor);
556             break;
557         case 0x8201: /* Private tag used by SONY C0023S01.mxf */
558             descriptor->extradata = av_malloc(size);
559             descriptor->extradata_size = size;
560             get_buffer(pb, descriptor->extradata, size);
561             break;
562 MXF_READ_LOCAL_TAGS_STOP(Descriptor, MXFDescriptor, descriptor)
563 }
564
565 /* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
566 static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
567     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
568     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
569     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
570     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
571 };
572
573 static const MXFCodecUL mxf_codec_uls[] = {
574     /* PictureEssenceCoding */
575     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
576     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
577     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
578     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
579     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
580     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
581     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
582     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
583     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
584     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
585     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
586     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
587     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
588     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
589     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
590     /* SoundEssenceCompression */
591     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
592     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
593     { { 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 */
594     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
595     { { 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 */
596     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
597     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
598   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
599     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
600 };
601
602 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
603     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
604     { { 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 */
605     { { 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 */
606     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
607 };
608
609 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
610     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
611     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
612     { { 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 */
613     { { 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 */
614     { { 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 */
615     { { 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 */
616     { { 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 */
617     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
618 };
619
620 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
621 {
622     while (uls->id != CODEC_ID_NONE) {
623         if(!memcmp(uls->uid, *uid, 16))
624             break;
625         uls++;
626     }
627     return uls;
628 }
629
630 static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
631 {
632     while (uls->type != CODEC_TYPE_DATA) {
633         if(!memcmp(uls->uid, *uid, 16))
634             break;
635         uls++;
636     }
637     return uls->type;
638 }
639
640 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
641 {
642     int i;
643
644     if (!strong_ref)
645         return NULL;
646     for (i = 0; i < mxf->metadata_sets_count; i++) {
647         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
648             (type == AnyType || mxf->metadata_sets[i]->type == type)) {
649             return mxf->metadata_sets[i];
650         }
651     }
652     return NULL;
653 }
654
655 static int mxf_parse_structural_metadata(MXFContext *mxf)
656 {
657     MXFPackage *material_package = NULL;
658     MXFPackage *temp_package = NULL;
659     int i, j, k;
660
661     dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
662     /* TODO: handle multiple material packages (OP3x) */
663     for (i = 0; i < mxf->packages_count; i++) {
664         material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
665         if (material_package) break;
666     }
667     if (!material_package) {
668         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
669         return -1;
670     }
671
672     for (i = 0; i < material_package->tracks_count; i++) {
673         MXFPackage *source_package = NULL;
674         MXFTrack *material_track = NULL;
675         MXFTrack *source_track = NULL;
676         MXFTrack *temp_track = NULL;
677         MXFDescriptor *descriptor = NULL;
678         MXFStructuralComponent *component = NULL;
679         const MXFCodecUL *codec_ul = NULL;
680         const MXFCodecUL *container_ul = NULL;
681         AVStream *st;
682
683         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
684             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
685             continue;
686         }
687
688         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
689             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
690             return -1;
691         }
692
693         /* TODO: handle multiple source clips */
694         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
695             /* TODO: handle timecode component */
696             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
697             if (!component)
698                 continue;
699
700             for (k = 0; k < mxf->packages_count; k++) {
701                 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
702                 if (!temp_package)
703                     continue;
704                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
705                     source_package = temp_package;
706                     break;
707                 }
708             }
709             if (!source_package) {
710                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
711                 break;
712             }
713             for (k = 0; k < source_package->tracks_count; k++) {
714                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
715                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
716                     return -1;
717                 }
718                 if (temp_track->track_id == component->source_track_id) {
719                     source_track = temp_track;
720                     break;
721                 }
722             }
723             if (!source_track) {
724                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
725                 break;
726             }
727         }
728         if (!source_track)
729             continue;
730
731         st = av_new_stream(mxf->fc, source_track->track_id);
732         st->priv_data = source_track;
733         st->duration = component->duration;
734         if (st->duration == -1)
735             st->duration = AV_NOPTS_VALUE;
736         st->start_time = component->start_position;
737         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
738
739         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
740             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
741             return -1;
742         }
743
744 #ifdef DEBUG
745         PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
746 #endif
747         st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
748
749         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
750         if (source_package->descriptor) {
751             if (source_package->descriptor->type == MultipleDescriptor) {
752                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
753                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
754
755                     if (!sub_descriptor) {
756                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
757                         continue;
758                     }
759                     if (sub_descriptor->linked_track_id == source_track->track_id) {
760                         descriptor = sub_descriptor;
761                         break;
762                     }
763                 }
764             } else if (source_package->descriptor->type == Descriptor)
765                 descriptor = source_package->descriptor;
766         }
767         if (!descriptor) {
768             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
769             continue;
770         }
771 #ifdef DEBUG
772         PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
773         PRINT_KEY("essence container ul", descriptor->essence_container_ul);
774 #endif
775         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
776         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
777         st->codec->codec_id = codec_ul->id;
778         if (descriptor->extradata) {
779             st->codec->extradata = descriptor->extradata;
780             st->codec->extradata_size = descriptor->extradata_size;
781         }
782         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
783             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
784             if (st->codec->codec_id == CODEC_ID_NONE)
785                 st->codec->codec_id = container_ul->id;
786             st->codec->width = descriptor->width;
787             st->codec->height = descriptor->height;
788             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
789             st->need_parsing = 2; /* only parse headers */
790         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
791             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
792             if (st->codec->codec_id == CODEC_ID_NONE)
793                 st->codec->codec_id = container_ul->id;
794             st->codec->channels = descriptor->channels;
795             st->codec->bits_per_sample = descriptor->bits_per_sample;
796             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
797             /* TODO: implement CODEC_ID_RAWAUDIO */
798             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
799                 if (descriptor->bits_per_sample == 24)
800                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
801                 else if (descriptor->bits_per_sample == 32)
802                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
803             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
804                 if (descriptor->bits_per_sample == 24)
805                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
806                 else if (descriptor->bits_per_sample == 32)
807                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
808                 if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
809                     st->codec->channels = 8; /* force channels to 8 */
810             } else if (st->codec->codec_id == CODEC_ID_MP2) {
811                 st->need_parsing = 1;
812             }
813         }
814         if (container_ul && container_ul->wrapping == Clip) {
815             dprintf("stream %d: clip wrapped essence\n", st->index);
816             st->need_parsing = 1;
817         }
818     }
819     return 0;
820 }
821
822 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
823     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface },
824     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage },
825     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package },
826     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package },
827     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence },
828     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip },
829     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_multiple_descriptor },
830     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor }, /* Generic Sound */
831     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor }, /* CDCI */
832     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor }, /* RGBA */
833     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor }, /* MPEG 2 Video */
834     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor }, /* Wave */
835     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor }, /* AES3 */
836     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track }, /* Static Track */
837     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track }, /* Generic Track */
838     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL },
839 };
840
841 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
842 {
843     int i, b;
844     for (i = 0; i < size && !url_feof(pb); i++) {
845         b = get_byte(pb);
846         if (b == key[0])
847             i = 0;
848         else if (b != key[i])
849             i = -1;
850     }
851     return i == size;
852 }
853
854 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
855 {
856     MXFContext *mxf = s->priv_data;
857     KLVPacket klv;
858
859     if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
860         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
861         return -1;
862     }
863     url_fseek(&s->pb, -14, SEEK_CUR);
864     mxf->fc = s;
865     while (!url_feof(&s->pb)) {
866         const MXFMetadataReadTableEntry *function;
867
868         if (klv_read_packet(&klv, &s->pb) < 0) {
869             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
870             return -1;
871         }
872 #ifdef DEBUG
873         PRINT_KEY("read header", klv.key);
874 #endif
875         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
876             /* FIXME avoid seek */
877             url_fseek(&s->pb, klv.offset, SEEK_SET);
878             break;
879         }
880
881         for (function = mxf_metadata_read_table; function->read; function++) {
882             if (IS_KLV_KEY(klv.key, function->key)) {
883                 if (function->read(mxf, &klv) < 0) {
884                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
885                     return -1;
886                 }
887                 break;
888             }
889         }
890         if (!function->read)
891             url_fskip(&s->pb, klv.length);
892     }
893     return mxf_parse_structural_metadata(mxf);
894 }
895
896 static int mxf_read_close(AVFormatContext *s)
897 {
898     MXFContext *mxf = s->priv_data;
899     int i;
900
901     av_freep(&mxf->packages_refs);
902     av_freep(&mxf->essence_container_data_sets_refs);
903     av_freep(&mxf->essence_containers_uls);
904     for (i = 0; i < mxf->metadata_sets_count; i++) {
905         switch (mxf->metadata_sets[i]->type) {
906         case MultipleDescriptor:
907             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
908             break;
909         case Sequence:
910             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
911             break;
912         case SourcePackage:
913         case MaterialPackage:
914             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
915             break;
916         default:
917             break;
918         }
919         av_freep(&mxf->metadata_sets[i]);
920     }
921     av_freep(&mxf->metadata_sets);
922     return 0;
923 }
924
925 static int mxf_probe(AVProbeData *p) {
926     uint8_t *bufp = p->buf;
927     uint8_t *end = p->buf + p->buf_size;
928
929     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
930         return 0;
931
932     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
933     end -= sizeof(mxf_header_partition_pack_key);
934     for (; bufp < end; bufp++) {
935         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
936             return AVPROBE_SCORE_MAX;
937     }
938     return 0;
939 }
940
941 /* rudimentary binary seek */
942 /* XXX: use MXF Index */
943 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
944 {
945     AVStream *st = s->streams[stream_index];
946     int64_t seconds;
947
948     if (!s->bit_rate)
949         return -1;
950     if (sample_time < 0)
951         sample_time = 0;
952     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
953     url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
954     if (!mxf_read_sync(&s->pb, mxf_essence_element_key, 12))
955         return -1;
956
957     /* found KLV key */
958     url_fseek(&s->pb, -12, SEEK_CUR);
959     av_update_cur_dts(s, st, sample_time);
960     return 0;
961 }
962
963 AVInputFormat mxf_demuxer = {
964     "mxf",
965     "MXF format",
966     sizeof(MXFContext),
967     mxf_probe,
968     mxf_read_header,
969     mxf_read_packet,
970     mxf_read_close,
971     mxf_read_seek,
972 };