merge multiple descriptor parsing with generic one
[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     const uint8_t *sync_key;
145     AVFormatContext *fc;
146 } MXFContext;
147
148 typedef struct KLVPacket {
149     UID key;
150     offset_t offset;
151     uint64_t length;
152 } KLVPacket;
153
154 enum MXFWrappingScheme {
155     Frame,
156     Clip,
157 };
158
159 typedef struct MXFCodecUL {
160     UID uid;
161     enum CodecID id;
162     enum MXFWrappingScheme wrapping;
163 } MXFCodecUL;
164
165 typedef struct MXFDataDefinitionUL {
166     UID uid;
167     enum CodecType type;
168 } MXFDataDefinitionUL;
169
170 typedef struct MXFMetadataReadTableEntry {
171     const UID key;
172     int (*read)();
173     int ctx_size;
174     enum MXFMetadataSetType type;
175 } MXFMetadataReadTableEntry;
176
177 /* partial keys to match */
178 static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
179 static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
180 /* complete keys to match */
181 static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
182
183 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
184
185 #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, \
186                              (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])
187
188 static int64_t klv_decode_ber_length(ByteIOContext *pb)
189 {
190     uint64_t size = get_byte(pb);
191     if (size & 0x80) { /* long form */
192         int bytes_num = size & 0x7f;
193         /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
194         if (bytes_num > 8)
195             return -1;
196         size = 0;
197         while (bytes_num--)
198             size = size << 8 | get_byte(pb);
199     }
200     return size;
201 }
202
203 static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
204 {
205     klv->offset = url_ftell(pb);
206     get_buffer(pb, klv->key, 16);
207     klv->length = klv_decode_ber_length(pb);
208     return klv->length == -1 ? -1 : 0;
209 }
210
211 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
212 {
213     int i;
214
215     for (i = 0; i < s->nb_streams; i++) {
216         MXFTrack *track = s->streams[i]->priv_data;
217         /* SMPTE 379M 7.3 */
218         if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
219             return i;
220     }
221     /* return 0 if only one stream, for OP Atom files with 0 as track number */
222     return s->nb_streams == 1 ? 0 : -1;
223 }
224
225 /* XXX: use AVBitStreamFilter */
226 static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
227 {
228     uint8_t buffer[61444];
229     uint8_t *buf_ptr, *end_ptr, *data_ptr;
230
231     if (length > 61444) /* worst case PAL 1920 samples 8 channels */
232         return -1;
233     get_buffer(pb, buffer, length);
234     av_new_packet(pkt, length);
235     data_ptr = pkt->data;
236     end_ptr = buffer + length;
237     buf_ptr = buffer + 4; /* skip SMPTE 331M header */
238     for (; buf_ptr < end_ptr; buf_ptr += 4) {
239         if (st->codec->bits_per_sample == 24) {
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] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
243             data_ptr += 3;
244         } else {
245             data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
246             data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
247             data_ptr += 2;
248         }
249     }
250     pkt->size = data_ptr - pkt->data;
251     return 0;
252 }
253
254 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
255 {
256     MXFContext *mxf = s->priv_data;
257     KLVPacket klv;
258
259     while (!url_feof(&s->pb)) {
260         if (klv_read_packet(&klv, &s->pb) < 0) {
261             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
262             return -1;
263         }
264 #ifdef DEBUG
265         PRINT_KEY("read packet", klv.key);
266 #endif
267         if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
268             mxf->sync_key = mxf_encrypted_triplet_key;
269             av_log(s, AV_LOG_ERROR, "encrypted triplet not supported\n");
270             return -1;
271         }
272         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
273             int index = mxf_get_stream_index(s, &klv);
274             if (index < 0) {
275                 av_log(s, AV_LOG_ERROR, "error getting stream index\n");
276                 url_fskip(&s->pb, klv.length);
277                 return -1;
278             }
279             /* check for 8 channels AES3 element */
280             if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
281                 if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
282                     av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
283                     return -1;
284                 }
285             } else
286                 av_get_packet(&s->pb, pkt, klv.length);
287             pkt->stream_index = index;
288             return 0;
289         } else
290             url_fskip(&s->pb, klv.length);
291     }
292     return AVERROR_IO;
293 }
294
295 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
296 {
297     mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
298     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
299     mxf->metadata_sets_count++;
300     return 0;
301 }
302
303 static int mxf_read_metadata_preface(MXFContext *mxf, ByteIOContext *pb, int tag)
304 {
305     switch (tag) {
306     case 0x3B03:
307         get_buffer(pb, mxf->content_storage_uid, 16);
308         break;
309     case 0x3B09:
310         get_buffer(pb, mxf->operational_pattern_ul, 16);
311         break;
312     case 0x3B0A:
313         mxf->essence_containers_uls_count = get_be32(pb);
314         if (mxf->essence_containers_uls_count >= UINT_MAX / sizeof(UID))
315             return -1;
316         mxf->essence_containers_uls = av_malloc(mxf->essence_containers_uls_count * sizeof(UID));
317         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
318         get_buffer(pb, (uint8_t *)mxf->essence_containers_uls, mxf->essence_containers_uls_count * sizeof(UID));
319         break;
320     }
321     return 0;
322 }
323
324 static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
325 {
326     switch (tag) {
327     case 0x1901:
328         mxf->packages_count = get_be32(pb);
329         if (mxf->packages_count >= UINT_MAX / sizeof(UID))
330             return -1;
331         mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
332         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
333         get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
334         break;
335     case 0x1902:
336         mxf->essence_container_data_sets_count = get_be32(pb);
337         if (mxf->essence_container_data_sets_count >= UINT_MAX / sizeof(UID))
338             return -1;
339         mxf->essence_container_data_sets_refs = av_malloc(mxf->essence_container_data_sets_count * sizeof(UID));
340         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
341         get_buffer(pb, (uint8_t *)mxf->essence_container_data_sets_refs, mxf->essence_container_data_sets_count * sizeof(UID));
342         break;
343     }
344     return 0;
345 }
346
347 static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
348 {
349     switch(tag) {
350     case 0x0202:
351         source_clip->duration = get_be64(pb);
352         break;
353     case 0x1201:
354         source_clip->start_position = get_be64(pb);
355         break;
356     case 0x1101:
357         /* UMID, only get last 16 bytes */
358         url_fskip(pb, 16);
359         get_buffer(pb, source_clip->source_package_uid, 16);
360         break;
361     case 0x1102:
362         source_clip->source_track_id = get_be32(pb);
363         break;
364     }
365     return 0;
366 }
367
368 static int mxf_read_metadata_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
369 {
370     switch(tag) {
371     case 0x4403:
372         package->tracks_count = get_be32(pb);
373         if (package->tracks_count >= UINT_MAX / sizeof(UID))
374             return -1;
375         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
376         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
377         get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
378         break;
379     }
380     return 0;
381 }
382
383 static int mxf_read_metadata_track(MXFTrack *track, ByteIOContext *pb, int tag)
384 {
385     switch(tag) {
386     case 0x4801:
387         track->track_id = get_be32(pb);
388         break;
389     case 0x4804:
390         get_buffer(pb, track->track_number, 4);
391         break;
392     case 0x4B01:
393         track->edit_rate.den = get_be32(pb);
394         track->edit_rate.num = get_be32(pb);
395         break;
396     case 0x4803:
397         get_buffer(pb, track->sequence_ref, 16);
398         break;
399     }
400     return 0;
401 }
402
403 static int mxf_read_metadata_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
404 {
405     switch(tag) {
406     case 0x0202:
407         sequence->duration = get_be64(pb);
408         break;
409     case 0x0201:
410         get_buffer(pb, sequence->data_definition_ul, 16);
411         break;
412     case 0x1001:
413         sequence->structural_components_count = get_be32(pb);
414         if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
415             return -1;
416         sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
417         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
418         get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
419         break;
420     }
421     return 0;
422 }
423
424 static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
425 {
426     switch(tag) {
427     case 0x4403:
428         package->tracks_count = get_be32(pb);
429         if (package->tracks_count >= UINT_MAX / sizeof(UID))
430             return -1;
431         package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
432         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
433         get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
434         break;
435     case 0x4401:
436         /* UMID, only get last 16 bytes */
437         url_fskip(pb, 16);
438         get_buffer(pb, package->package_uid, 16);
439         break;
440     case 0x4701:
441         get_buffer(pb, package->descriptor_ref, 16);
442         break;
443     }
444     return 0;
445 }
446
447 static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
448 {
449     int code;
450
451     do {
452         code = get_byte(pb);
453         dprintf("pixel layout: code 0x%x\n", code);
454         switch (code) {
455         case 0x52: /* R */
456             descriptor->bits_per_sample += get_byte(pb);
457             break;
458         case 0x47: /* G */
459             descriptor->bits_per_sample += get_byte(pb);
460             break;
461         case 0x42: /* B */
462             descriptor->bits_per_sample += get_byte(pb);
463             break;
464         default:
465             get_byte(pb);
466         }
467     } while (code != 0); /* SMPTE 377M E.2.46 */
468 }
469
470 static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
471 {
472     switch(tag) {
473     case 0x3F01:
474         descriptor->sub_descriptors_count = get_be32(pb);
475         if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
476             return -1;
477         descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
478         url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
479         get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
480         break;
481     case 0x3004:
482         get_buffer(pb, descriptor->essence_container_ul, 16);
483         break;
484     case 0x3006:
485         descriptor->linked_track_id = get_be32(pb);
486         break;
487     case 0x3201: /* PictureEssenceCoding */
488         get_buffer(pb, descriptor->essence_codec_ul, 16);
489         break;
490     case 0x3203:
491         descriptor->width = get_be32(pb);
492         break;
493     case 0x3202:
494         descriptor->height = get_be32(pb);
495         break;
496     case 0x320E:
497         descriptor->aspect_ratio.num = get_be32(pb);
498         descriptor->aspect_ratio.den = get_be32(pb);
499         break;
500     case 0x3D03:
501         descriptor->sample_rate.num = get_be32(pb);
502         descriptor->sample_rate.den = get_be32(pb);
503         break;
504     case 0x3D06: /* SoundEssenceCompression */
505         get_buffer(pb, descriptor->essence_codec_ul, 16);
506         break;
507     case 0x3D07:
508         descriptor->channels = get_be32(pb);
509         break;
510     case 0x3D01:
511         descriptor->bits_per_sample = get_be32(pb);
512         break;
513     case 0x3401:
514         mxf_read_metadata_pixel_layout(pb, descriptor);
515         break;
516     case 0x8201: /* Private tag used by SONY C0023S01.mxf */
517         descriptor->extradata = av_malloc(size);
518         descriptor->extradata_size = size;
519         get_buffer(pb, descriptor->extradata, size);
520         break;
521     }
522     return 0;
523 }
524
525 /* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
526 static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
527     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
528     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
529     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
530     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
531 };
532
533 static const MXFCodecUL mxf_codec_uls[] = {
534     /* PictureEssenceCoding */
535     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
536     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
537     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
538     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
539     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
540     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
541     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
542     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
543     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
544     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
545     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
546     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
547     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
548     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
549     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
550     /* SoundEssenceCompression */
551     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
552     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
553     { { 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 */
554     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
555     { { 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 */
556     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
557     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
558   //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
559     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
560 };
561
562 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
563     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
564     { { 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 */
565     { { 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 */
566     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
567 };
568
569 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
570     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
571     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
572     { { 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 */
573     { { 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 */
574     { { 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 */
575     { { 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 */
576     { { 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 */
577     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
578 };
579
580 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
581 {
582     while (uls->id != CODEC_ID_NONE) {
583         if(!memcmp(uls->uid, *uid, 16))
584             break;
585         uls++;
586     }
587     return uls;
588 }
589
590 static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
591 {
592     while (uls->type != CODEC_TYPE_DATA) {
593         if(!memcmp(uls->uid, *uid, 16))
594             break;
595         uls++;
596     }
597     return uls->type;
598 }
599
600 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
601 {
602     int i;
603
604     if (!strong_ref)
605         return NULL;
606     for (i = 0; i < mxf->metadata_sets_count; i++) {
607         if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
608             (type == AnyType || mxf->metadata_sets[i]->type == type)) {
609             return mxf->metadata_sets[i];
610         }
611     }
612     return NULL;
613 }
614
615 static int mxf_parse_structural_metadata(MXFContext *mxf)
616 {
617     MXFPackage *material_package = NULL;
618     MXFPackage *temp_package = NULL;
619     int i, j, k;
620
621     dprintf("metadata sets count %d\n", mxf->metadata_sets_count);
622     /* TODO: handle multiple material packages (OP3x) */
623     for (i = 0; i < mxf->packages_count; i++) {
624         material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
625         if (material_package) break;
626     }
627     if (!material_package) {
628         av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
629         return -1;
630     }
631
632     for (i = 0; i < material_package->tracks_count; i++) {
633         MXFPackage *source_package = NULL;
634         MXFTrack *material_track = NULL;
635         MXFTrack *source_track = NULL;
636         MXFTrack *temp_track = NULL;
637         MXFDescriptor *descriptor = NULL;
638         MXFStructuralComponent *component = NULL;
639         const MXFCodecUL *codec_ul = NULL;
640         const MXFCodecUL *container_ul = NULL;
641         AVStream *st;
642
643         if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
644             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
645             continue;
646         }
647
648         if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
649             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
650             return -1;
651         }
652
653         /* TODO: handle multiple source clips */
654         for (j = 0; j < material_track->sequence->structural_components_count; j++) {
655             /* TODO: handle timecode component */
656             component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
657             if (!component)
658                 continue;
659
660             for (k = 0; k < mxf->packages_count; k++) {
661                 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
662                 if (!temp_package)
663                     continue;
664                 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
665                     source_package = temp_package;
666                     break;
667                 }
668             }
669             if (!source_package) {
670                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
671                 break;
672             }
673             for (k = 0; k < source_package->tracks_count; k++) {
674                 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
675                     av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
676                     return -1;
677                 }
678                 if (temp_track->track_id == component->source_track_id) {
679                     source_track = temp_track;
680                     break;
681                 }
682             }
683             if (!source_track) {
684                 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
685                 break;
686             }
687         }
688         if (!source_track)
689             continue;
690
691         st = av_new_stream(mxf->fc, source_track->track_id);
692         st->priv_data = source_track;
693         st->duration = component->duration;
694         if (st->duration == -1)
695             st->duration = AV_NOPTS_VALUE;
696         st->start_time = component->start_position;
697         av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
698
699         if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
700             av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
701             return -1;
702         }
703
704 #ifdef DEBUG
705         PRINT_KEY("data definition   ul", source_track->sequence->data_definition_ul);
706 #endif
707         st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
708
709         source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
710         if (source_package->descriptor) {
711             if (source_package->descriptor->type == MultipleDescriptor) {
712                 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
713                     MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
714
715                     if (!sub_descriptor) {
716                         av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
717                         continue;
718                     }
719                     if (sub_descriptor->linked_track_id == source_track->track_id) {
720                         descriptor = sub_descriptor;
721                         break;
722                     }
723                 }
724             } else if (source_package->descriptor->type == Descriptor)
725                 descriptor = source_package->descriptor;
726         }
727         if (!descriptor) {
728             av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
729             continue;
730         }
731 #ifdef DEBUG
732         PRINT_KEY("essence codec     ul", descriptor->essence_codec_ul);
733         PRINT_KEY("essence container ul", descriptor->essence_container_ul);
734 #endif
735         /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
736         codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
737         st->codec->codec_id = codec_ul->id;
738         if (descriptor->extradata) {
739             st->codec->extradata = descriptor->extradata;
740             st->codec->extradata_size = descriptor->extradata_size;
741         }
742         if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
743             container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, &descriptor->essence_container_ul);
744             if (st->codec->codec_id == CODEC_ID_NONE)
745                 st->codec->codec_id = container_ul->id;
746             st->codec->width = descriptor->width;
747             st->codec->height = descriptor->height;
748             st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
749             st->need_parsing = 2; /* only parse headers */
750         } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
751             container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, &descriptor->essence_container_ul);
752             if (st->codec->codec_id == CODEC_ID_NONE)
753                 st->codec->codec_id = container_ul->id;
754             st->codec->channels = descriptor->channels;
755             st->codec->bits_per_sample = descriptor->bits_per_sample;
756             st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
757             /* TODO: implement CODEC_ID_RAWAUDIO */
758             if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
759                 if (descriptor->bits_per_sample == 24)
760                     st->codec->codec_id = CODEC_ID_PCM_S24LE;
761                 else if (descriptor->bits_per_sample == 32)
762                     st->codec->codec_id = CODEC_ID_PCM_S32LE;
763             } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
764                 if (descriptor->bits_per_sample == 24)
765                     st->codec->codec_id = CODEC_ID_PCM_S24BE;
766                 else if (descriptor->bits_per_sample == 32)
767                     st->codec->codec_id = CODEC_ID_PCM_S32BE;
768                 if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
769                     st->codec->channels = 8; /* force channels to 8 */
770             } else if (st->codec->codec_id == CODEC_ID_MP2) {
771                 st->need_parsing = 1;
772             }
773         }
774         if (container_ul && container_ul->wrapping == Clip) {
775             dprintf("stream %d: clip wrapped essence\n", st->index);
776             st->need_parsing = 1;
777         }
778     }
779     return 0;
780 }
781
782 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
783     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2F,0x00 }, mxf_read_metadata_preface, 0, AnyType },
784     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
785     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
786     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
787     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
788     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
789     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
790     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
791     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
792     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
793     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
794     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
795     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
796     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Static Track */
797     { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Generic Track */
798     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
799 };
800
801 static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
802 {
803     int i, b;
804     for (i = 0; i < size && !url_feof(pb); i++) {
805         b = get_byte(pb);
806         if (b == key[0])
807             i = 0;
808         else if (b != key[i])
809             i = -1;
810     }
811     return i == size;
812 }
813
814 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
815 {
816     ByteIOContext *pb = &mxf->fc->pb;
817     MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
818     uint64_t klv_end= url_ftell(pb) + klv->length;
819
820     while (url_ftell(pb) + 4 < klv_end) {
821         int tag = get_be16(pb);
822         int size = get_be16(pb); /* KLV specified by 0x53 */
823         uint64_t next= url_ftell(pb) + size;
824
825         if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
826             av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
827             continue;
828         }
829         if(ctx_size && tag == 0x3C0A)
830             get_buffer(pb, ctx->uid, 16);
831         else
832             read_child(ctx, pb, tag, size);
833
834         url_fseek(pb, next, SEEK_SET);
835     }
836     if (ctx_size) ctx->type = type;
837     return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
838 }
839
840 static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
841 {
842     MXFContext *mxf = s->priv_data;
843     KLVPacket klv;
844
845     mxf->sync_key = mxf_essence_element_key;
846     if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
847         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
848         return -1;
849     }
850     url_fseek(&s->pb, -14, SEEK_CUR);
851     mxf->fc = s;
852     while (!url_feof(&s->pb)) {
853         const MXFMetadataReadTableEntry *function;
854
855         if (klv_read_packet(&klv, &s->pb) < 0) {
856             av_log(s, AV_LOG_ERROR, "error reading KLV packet\n");
857             return -1;
858         }
859 #ifdef DEBUG
860         PRINT_KEY("read header", klv.key);
861 #endif
862         if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
863             /* FIXME avoid seek */
864             url_fseek(&s->pb, klv.offset, SEEK_SET);
865             break;
866         }
867
868         for (function = mxf_metadata_read_table; function->read; function++) {
869             if (IS_KLV_KEY(klv.key, function->key)) {
870                 if (mxf_read_local_tags(mxf, &klv, function->read, function->ctx_size, function->type) < 0) {
871                     av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
872                     return -1;
873                 }
874                 break;
875             }
876         }
877         if (!function->read)
878             url_fskip(&s->pb, klv.length);
879     }
880     return mxf_parse_structural_metadata(mxf);
881 }
882
883 static int mxf_read_close(AVFormatContext *s)
884 {
885     MXFContext *mxf = s->priv_data;
886     int i;
887
888     av_freep(&mxf->packages_refs);
889     av_freep(&mxf->essence_container_data_sets_refs);
890     av_freep(&mxf->essence_containers_uls);
891     for (i = 0; i < mxf->metadata_sets_count; i++) {
892         switch (mxf->metadata_sets[i]->type) {
893         case MultipleDescriptor:
894             av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
895             break;
896         case Sequence:
897             av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
898             break;
899         case SourcePackage:
900         case MaterialPackage:
901             av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
902             break;
903         default:
904             break;
905         }
906         av_freep(&mxf->metadata_sets[i]);
907     }
908     av_freep(&mxf->metadata_sets);
909     return 0;
910 }
911
912 static int mxf_probe(AVProbeData *p) {
913     uint8_t *bufp = p->buf;
914     uint8_t *end = p->buf + p->buf_size;
915
916     if (p->buf_size < sizeof(mxf_header_partition_pack_key))
917         return 0;
918
919     /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
920     end -= sizeof(mxf_header_partition_pack_key);
921     for (; bufp < end; bufp++) {
922         if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
923             return AVPROBE_SCORE_MAX;
924     }
925     return 0;
926 }
927
928 /* rudimentary binary seek */
929 /* XXX: use MXF Index */
930 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
931 {
932     MXFContext *mxf = s->priv_data;
933     AVStream *st = s->streams[stream_index];
934     int64_t seconds;
935
936     if (!s->bit_rate)
937         return -1;
938     if (sample_time < 0)
939         sample_time = 0;
940     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
941     url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
942     if (!mxf_read_sync(&s->pb, mxf->sync_key, 12))
943         return -1;
944
945     /* found KLV key */
946     url_fseek(&s->pb, -12, SEEK_CUR);
947     av_update_cur_dts(s, st, sample_time);
948     return 0;
949 }
950
951 AVInputFormat mxf_demuxer = {
952     "mxf",
953     "MXF format",
954     sizeof(MXFContext),
955     mxf_probe,
956     mxf_read_header,
957     mxf_read_packet,
958     mxf_read_close,
959     mxf_read_seek,
960 };