rename mxf.c to mxfdec.c
[libav.git] / libavformat / mxfdec.c
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BC
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 "libavutil/aes.h"
49#include "libavcodec/bytestream.h"
50#include "avformat.h"
51
52typedef uint8_t UID[16];
53
54enum MXFMetadataSetType {
55 AnyType,
56 MaterialPackage,
57 SourcePackage,
58 SourceClip,
59 TimecodeComponent,
60 Sequence,
61 MultipleDescriptor,
62 Descriptor,
63 Track,
64 CryptoContext,
65};
66
67typedef struct {
68 UID uid;
69 enum MXFMetadataSetType type;
70 UID source_container_ul;
71} MXFCryptoContext;
72
73typedef struct {
74 UID uid;
75 enum MXFMetadataSetType type;
76 UID source_package_uid;
77 UID data_definition_ul;
78 int64_t duration;
79 int64_t start_position;
80 int source_track_id;
81} MXFStructuralComponent;
82
83typedef struct {
84 UID uid;
85 enum MXFMetadataSetType type;
86 UID data_definition_ul;
87 UID *structural_components_refs;
88 int structural_components_count;
89 int64_t duration;
90} MXFSequence;
91
92typedef struct {
93 UID uid;
94 enum MXFMetadataSetType type;
95 MXFSequence *sequence; /* mandatory, and only one */
96 UID sequence_ref;
97 int track_id;
98 uint8_t track_number[4];
99 AVRational edit_rate;
100} MXFTrack;
101
102typedef struct {
103 UID uid;
104 enum MXFMetadataSetType type;
105 UID essence_container_ul;
106 UID essence_codec_ul;
107 AVRational sample_rate;
108 AVRational aspect_ratio;
109 int width;
110 int height;
111 int channels;
112 int bits_per_sample;
113 UID *sub_descriptors_refs;
114 int sub_descriptors_count;
115 int linked_track_id;
116 uint8_t *extradata;
117 int extradata_size;
118} MXFDescriptor;
119
120typedef struct {
121 UID uid;
122 enum MXFMetadataSetType type;
123 UID package_uid;
124 UID *tracks_refs;
125 int tracks_count;
126 MXFDescriptor *descriptor; /* only one */
127 UID descriptor_ref;
128} MXFPackage;
129
130typedef struct {
131 UID uid;
132 enum MXFMetadataSetType type;
133} MXFMetadataSet;
134
135typedef struct {
136 UID *packages_refs;
137 int packages_count;
138 MXFMetadataSet **metadata_sets;
139 int metadata_sets_count;
140 AVFormatContext *fc;
141 struct AVAES *aesc;
142 uint8_t *local_tags;
143 int local_tags_count;
144} MXFContext;
145
146typedef struct {
147 UID key;
148 offset_t offset;
149 uint64_t length;
150} KLVPacket;
151
152enum MXFWrappingScheme {
153 Frame,
154 Clip,
155};
156
157typedef struct {
158 UID uid;
159 unsigned matching_len;
160 enum CodecID id;
161} MXFCodecUL;
162
163typedef struct {
164 UID uid;
165 enum CodecType type;
166} MXFDataDefinitionUL;
167
168typedef struct {
169 const UID key;
170 int (*read)();
171 int ctx_size;
172 enum MXFMetadataSetType type;
173} MXFMetadataReadTableEntry;
174
175/* partial keys to match */
176static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
177static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
178static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
179/* complete keys to match */
180static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
181static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
182static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
183static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
184
185#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
186
187#define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
188 (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])
189
190static int64_t klv_decode_ber_length(ByteIOContext *pb)
191{
192 uint64_t size = get_byte(pb);
193 if (size & 0x80) { /* long form */
194 int bytes_num = size & 0x7f;
195 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
196 if (bytes_num > 8)
197 return -1;
198 size = 0;
199 while (bytes_num--)
200 size = size << 8 | get_byte(pb);
201 }
202 return size;
203}
204
205static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
206{
207 int i, b;
208 for (i = 0; i < size && !url_feof(pb); i++) {
209 b = get_byte(pb);
210 if (b == key[0])
211 i = 0;
212 else if (b != key[i])
213 i = -1;
214 }
215 return i == size;
216}
217
218static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
219{
220 if (!mxf_read_sync(pb, mxf_klv_key, 4))
221 return -1;
222 klv->offset = url_ftell(pb) - 4;
223 memcpy(klv->key, mxf_klv_key, 4);
224 get_buffer(pb, klv->key + 4, 12);
225 klv->length = klv_decode_ber_length(pb);
226 return klv->length == -1 ? -1 : 0;
227}
228
229static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
230{
231 int i;
232
233 for (i = 0; i < s->nb_streams; i++) {
234 MXFTrack *track = s->streams[i]->priv_data;
235 /* SMPTE 379M 7.3 */
236 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
237 return i;
238 }
239 /* return 0 if only one stream, for OP Atom files with 0 as track number */
240 return s->nb_streams == 1 ? 0 : -1;
241}
242
243/* XXX: use AVBitStreamFilter */
244static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
245{
246 uint8_t buffer[61444];
247 const uint8_t *buf_ptr, *end_ptr;
248 uint8_t *data_ptr;
249 int i;
250
251 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
252 return -1;
253 get_buffer(pb, buffer, length);
254 av_new_packet(pkt, length);
255 data_ptr = pkt->data;
256 end_ptr = buffer + length;
257 buf_ptr = buffer + 4; /* skip SMPTE 331M header */
258 for (; buf_ptr < end_ptr; ) {
259 for (i = 0; i < st->codec->channels; i++) {
260 uint32_t sample = bytestream_get_le32(&buf_ptr);
261 if (st->codec->bits_per_sample == 24)
262 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
263 else
264 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
265 }
266 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
267 }
268 pkt->size = data_ptr - pkt->data;
269 return 0;
270}
271
272static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
273{
274 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
275 MXFContext *mxf = s->priv_data;
276 ByteIOContext *pb = s->pb;
277 offset_t end = url_ftell(pb) + klv->length;
278 uint64_t size;
279 uint64_t orig_size;
280 uint64_t plaintext_size;
281 uint8_t ivec[16];
282 uint8_t tmpbuf[16];
283 int index;
284
285 if (!mxf->aesc && s->key && s->keylen == 16) {
286 mxf->aesc = av_malloc(av_aes_size);
287 if (!mxf->aesc)
288 return -1;
289 av_aes_init(mxf->aesc, s->key, 128, 1);
290 }
291 // crypto context
292 url_fskip(pb, klv_decode_ber_length(pb));
293 // plaintext offset
294 klv_decode_ber_length(pb);
295 plaintext_size = get_be64(pb);
296 // source klv key
297 klv_decode_ber_length(pb);
298 get_buffer(pb, klv->key, 16);
299 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
300 return -1;
301 index = mxf_get_stream_index(s, klv);
302 if (index < 0)
303 return -1;
304 // source size
305 klv_decode_ber_length(pb);
306 orig_size = get_be64(pb);
307 if (orig_size < plaintext_size)
308 return -1;
309 // enc. code
310 size = klv_decode_ber_length(pb);
311 if (size < 32 || size - 32 < orig_size)
312 return -1;
313 get_buffer(pb, ivec, 16);
314 get_buffer(pb, tmpbuf, 16);
315 if (mxf->aesc)
316 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
317 if (memcmp(tmpbuf, checkv, 16))
318 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
319 size -= 32;
320 av_get_packet(pb, pkt, size);
321 size -= plaintext_size;
322 if (mxf->aesc)
323 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
324 &pkt->data[plaintext_size], size >> 4, ivec, 1);
325 pkt->size = orig_size;
326 pkt->stream_index = index;
327 url_fskip(pb, end - url_ftell(pb));
328 return 0;
329}
330
331static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
332{
333 KLVPacket klv;
334
335 while (!url_feof(s->pb)) {
336 if (klv_read_packet(&klv, s->pb) < 0)
337 return -1;
338#ifdef DEBUG
339 PRINT_KEY(s, "read packet", klv.key);
340#endif
341 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
342 int res = mxf_decrypt_triplet(s, pkt, &klv);
343 if (res < 0) {
344 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
345 return -1;
346 }
347 return 0;
348 }
349 if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
350 int index = mxf_get_stream_index(s, &klv);
351 if (index < 0) {
352 av_log(s, AV_LOG_ERROR, "error getting stream index %x\n", AV_RB32(klv.key+12));
353 goto skip;
354 }
355 if (s->streams[index]->discard == AVDISCARD_ALL)
356 goto skip;
357 /* check for 8 channels AES3 element */
358 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
359 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
360 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
361 return -1;
362 }
363 } else
364 av_get_packet(s->pb, pkt, klv.length);
365 pkt->stream_index = index;
366 pkt->pos = klv.offset;
367 return 0;
368 } else
369 skip:
370 url_fskip(s->pb, klv.length);
371 }
372 return AVERROR(EIO);
373}
374
375static int mxf_read_primer_pack(MXFContext *mxf)
376{
377 ByteIOContext *pb = mxf->fc->pb;
378 int item_num = get_be32(pb);
379 int item_len = get_be32(pb);
380
381 if (item_len != 18) {
382 av_log(mxf->fc, AV_LOG_ERROR, "unsupported primer pack item length\n");
383 return -1;
384 }
385 if (item_num > UINT_MAX / item_len)
386 return -1;
387 mxf->local_tags_count = item_num;
388 mxf->local_tags = av_malloc(item_num*item_len);
389 if (!mxf->local_tags)
390 return -1;
391 get_buffer(pb, mxf->local_tags, item_num*item_len);
392 return 0;
393}
394
395static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
396{
397 mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
398 if (!mxf->metadata_sets)
399 return -1;
400 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
401 mxf->metadata_sets_count++;
402 return 0;
403}
404
405static int mxf_read_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag, int size, UID uid)
406{
407 if (size != 16)
408 return -1;
409 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
410 get_buffer(pb, cryptocontext->source_container_ul, 16);
411 return 0;
412}
413
414static int mxf_read_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
415{
416 switch (tag) {
417 case 0x1901:
418 mxf->packages_count = get_be32(pb);
419 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
420 return -1;
421 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
422 if (!mxf->packages_refs)
423 return -1;
424 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
425 get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
426 break;
427 }
428 return 0;
429}
430
431static int mxf_read_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
432{
433 switch(tag) {
434 case 0x0202:
435 source_clip->duration = get_be64(pb);
436 break;
437 case 0x1201:
438 source_clip->start_position = get_be64(pb);
439 break;
440 case 0x1101:
441 /* UMID, only get last 16 bytes */
442 url_fskip(pb, 16);
443 get_buffer(pb, source_clip->source_package_uid, 16);
444 break;
445 case 0x1102:
446 source_clip->source_track_id = get_be32(pb);
447 break;
448 }
449 return 0;
450}
451
452static int mxf_read_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
453{
454 switch(tag) {
455 case 0x4403:
456 package->tracks_count = get_be32(pb);
457 if (package->tracks_count >= UINT_MAX / sizeof(UID))
458 return -1;
459 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
460 if (!package->tracks_refs)
461 return -1;
462 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
463 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
464 break;
465 }
466 return 0;
467}
468
469static int mxf_read_track(MXFTrack *track, ByteIOContext *pb, int tag)
470{
471 switch(tag) {
472 case 0x4801:
473 track->track_id = get_be32(pb);
474 break;
475 case 0x4804:
476 get_buffer(pb, track->track_number, 4);
477 break;
478 case 0x4B01:
479 track->edit_rate.den = get_be32(pb);
480 track->edit_rate.num = get_be32(pb);
481 break;
482 case 0x4803:
483 get_buffer(pb, track->sequence_ref, 16);
484 break;
485 }
486 return 0;
487}
488
489static int mxf_read_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
490{
491 switch(tag) {
492 case 0x0202:
493 sequence->duration = get_be64(pb);
494 break;
495 case 0x0201:
496 get_buffer(pb, sequence->data_definition_ul, 16);
497 break;
498 case 0x1001:
499 sequence->structural_components_count = get_be32(pb);
500 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
501 return -1;
502 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
503 if (!sequence->structural_components_refs)
504 return -1;
505 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
506 get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
507 break;
508 }
509 return 0;
510}
511
512static int mxf_read_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
513{
514 switch(tag) {
515 case 0x4403:
516 package->tracks_count = get_be32(pb);
517 if (package->tracks_count >= UINT_MAX / sizeof(UID))
518 return -1;
519 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
520 if (!package->tracks_refs)
521 return -1;
522 url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
523 get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
524 break;
525 case 0x4401:
526 /* UMID, only get last 16 bytes */
527 url_fskip(pb, 16);
528 get_buffer(pb, package->package_uid, 16);
529 break;
530 case 0x4701:
531 get_buffer(pb, package->descriptor_ref, 16);
532 break;
533 }
534 return 0;
535}
536
537static void mxf_read_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
538{
539 int code;
540
541 do {
542 code = get_byte(pb);
543 dprintf(NULL, "pixel layout: code 0x%x\n", code);
544 switch (code) {
545 case 0x52: /* R */
546 descriptor->bits_per_sample += get_byte(pb);
547 break;
548 case 0x47: /* G */
549 descriptor->bits_per_sample += get_byte(pb);
550 break;
551 case 0x42: /* B */
552 descriptor->bits_per_sample += get_byte(pb);
553 break;
554 default:
555 get_byte(pb);
556 }
557 } while (code != 0); /* SMPTE 377M E.2.46 */
558}
559
560static int mxf_read_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size, UID uid)
561{
562 switch(tag) {
563 case 0x3F01:
564 descriptor->sub_descriptors_count = get_be32(pb);
565 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
566 return -1;
567 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
568 if (!descriptor->sub_descriptors_refs)
569 return -1;
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 case 0x3004:
574 get_buffer(pb, descriptor->essence_container_ul, 16);
575 break;
576 case 0x3006:
577 descriptor->linked_track_id = get_be32(pb);
578 break;
579 case 0x3201: /* PictureEssenceCoding */
580 get_buffer(pb, descriptor->essence_codec_ul, 16);
581 break;
582 case 0x3203:
583 descriptor->width = get_be32(pb);
584 break;
585 case 0x3202:
586 descriptor->height = get_be32(pb);
587 break;
588 case 0x320E:
589 descriptor->aspect_ratio.num = get_be32(pb);
590 descriptor->aspect_ratio.den = get_be32(pb);
591 break;
592 case 0x3D03:
593 descriptor->sample_rate.num = get_be32(pb);
594 descriptor->sample_rate.den = get_be32(pb);
595 break;
596 case 0x3D06: /* SoundEssenceCompression */
597 get_buffer(pb, descriptor->essence_codec_ul, 16);
598 break;
599 case 0x3D07:
600 descriptor->channels = get_be32(pb);
601 break;
602 case 0x3D01:
603 descriptor->bits_per_sample = get_be32(pb);
604 break;
605 case 0x3401:
606 mxf_read_pixel_layout(pb, descriptor);
607 break;
608 default:
609 /* Private uid used by SONY C0023S01.mxf */
610 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
611 descriptor->extradata = av_malloc(size);
612 if (!descriptor->extradata)
613 return -1;
614 descriptor->extradata_size = size;
615 get_buffer(pb, descriptor->extradata, size);
616 }
617 break;
618 }
619 return 0;
620}
621
622/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
623static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
624 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
625 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
626 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
627 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, CODEC_TYPE_DATA },
628};
629
630static const MXFCodecUL mxf_codec_uls[] = {
631 /* PictureEssenceCoding */
632 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP@ML Long GoP */
633 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* D-10 50Mbps PAL */
634 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* MP@HL Long GoP */
635 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, 14, CODEC_ID_MPEG2VIDEO }, /* 422P@HL I-Frame */
636 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 }, 14, CODEC_ID_MPEG4 }, /* XDCAM proxy_pal030926.mxf */
637 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 }, 13, CODEC_ID_DVVIDEO }, /* DV25 IEC PAL */
638 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
639 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, CODEC_ID_RAWVIDEO }, /* Uncompressed */
640 /* SoundEssenceCompression */
641 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE }, /* Uncompressed */
642 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16LE },
643 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 }, 13, CODEC_ID_PCM_S16BE }, /* From Omneon MXF file */
644 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 }, 15, CODEC_ID_PCM_ALAW }, /* XDCAM Proxy C0023S01.mxf */
645 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 }, 15, CODEC_ID_AC3 },
646 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 }, 15, CODEC_ID_MP2 }, /* MP2 or MP3 */
647 //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 }, 15, CODEC_ID_DOLBY_E }, /* Dolby-E */
648 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
649};
650
651static const MXFCodecUL mxf_picture_essence_container_uls[] = {
652 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
653 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
654 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
655};
656
657static const MXFCodecUL mxf_sound_essence_container_uls[] = {
658 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
659 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
660 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
661 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
662};
663
664/*
665 * Match an uid independently of the version byte and up to len common bytes
666 * Returns: boolean
667 */
668static int mxf_match_uid(const UID key, const UID uid, int len)
669{
670 int i;
671 for (i = 0; i < len; i++) {
672 if (i != 7 && key[i] != uid[i])
673 return 0;
674 }
675 return 1;
676}
677
678static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
679{
680 while (uls->id != CODEC_ID_NONE) {
681 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
682 break;
683 uls++;
684 }
685 return uls;
686}
687
688static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
689{
690 while (uls->type != CODEC_TYPE_DATA) {
691 if(mxf_match_uid(uls->uid, *uid, 16))
692 break;
693 uls++;
694 }
695 return uls->type;
696}
697
698static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
699{
700 int i;
701
702 if (!strong_ref)
703 return NULL;
704 for (i = 0; i < mxf->metadata_sets_count; i++) {
705 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
706 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
707 return mxf->metadata_sets[i];
708 }
709 }
710 return NULL;
711}
712
713static int mxf_parse_structural_metadata(MXFContext *mxf)
714{
715 MXFPackage *material_package = NULL;
716 MXFPackage *temp_package = NULL;
717 int i, j, k;
718
719 dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
720 /* TODO: handle multiple material packages (OP3x) */
721 for (i = 0; i < mxf->packages_count; i++) {
722 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
723 if (material_package) break;
724 }
725 if (!material_package) {
726 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
727 return -1;
728 }
729
730 for (i = 0; i < material_package->tracks_count; i++) {
731 MXFPackage *source_package = NULL;
732 MXFTrack *material_track = NULL;
733 MXFTrack *source_track = NULL;
734 MXFTrack *temp_track = NULL;
735 MXFDescriptor *descriptor = NULL;
736 MXFStructuralComponent *component = NULL;
737 UID *essence_container_ul = NULL;
738 const MXFCodecUL *codec_ul = NULL;
739 const MXFCodecUL *container_ul = NULL;
740 AVStream *st;
741
742 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
743 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
744 continue;
745 }
746
747 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
748 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
749 return -1;
750 }
751
752 /* TODO: handle multiple source clips */
753 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
754 /* TODO: handle timecode component */
755 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
756 if (!component)
757 continue;
758
759 for (k = 0; k < mxf->packages_count; k++) {
760 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
761 if (!temp_package)
762 continue;
763 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
764 source_package = temp_package;
765 break;
766 }
767 }
768 if (!source_package) {
769 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
770 break;
771 }
772 for (k = 0; k < source_package->tracks_count; k++) {
773 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
774 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
775 return -1;
776 }
777 if (temp_track->track_id == component->source_track_id) {
778 source_track = temp_track;
779 break;
780 }
781 }
782 if (!source_track) {
783 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
784 break;
785 }
786 }
787 if (!source_track)
788 continue;
789
790 st = av_new_stream(mxf->fc, source_track->track_id);
791 if (!st) {
792 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
793 return -1;
794 }
795 st->priv_data = source_track;
796 st->duration = component->duration;
797 if (st->duration == -1)
798 st->duration = AV_NOPTS_VALUE;
799 st->start_time = component->start_position;
800 av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
801
802 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
803 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
804 return -1;
805 }
806
807#ifdef DEBUG
808 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
809#endif
810 st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
811
812 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
813 if (source_package->descriptor) {
814 if (source_package->descriptor->type == MultipleDescriptor) {
815 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
816 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
817
818 if (!sub_descriptor) {
819 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
820 continue;
821 }
822 if (sub_descriptor->linked_track_id == source_track->track_id) {
823 descriptor = sub_descriptor;
824 break;
825 }
826 }
827 } else if (source_package->descriptor->type == Descriptor)
828 descriptor = source_package->descriptor;
829 }
830 if (!descriptor) {
831 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
832 continue;
833 }
834#ifdef DEBUG
835 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
836 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
837#endif
838 essence_container_ul = &descriptor->essence_container_ul;
839 /* HACK: replacing the original key with mxf_encrypted_essence_container
840 * is not allowed according to s429-6, try to find correct information anyway */
841 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
842 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
843 for (k = 0; k < mxf->metadata_sets_count; k++) {
844 MXFMetadataSet *metadata = mxf->metadata_sets[k];
845 if (metadata->type == CryptoContext) {
846 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
847 break;
848 }
849 }
850 }
851 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
852 codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
853 st->codec->codec_id = codec_ul->id;
854 if (descriptor->extradata) {
855 st->codec->extradata = descriptor->extradata;
856 st->codec->extradata_size = descriptor->extradata_size;
857 }
858 if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
859 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
860 if (st->codec->codec_id == CODEC_ID_NONE)
861 st->codec->codec_id = container_ul->id;
862 st->codec->width = descriptor->width;
863 st->codec->height = descriptor->height;
864 st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
865 st->need_parsing = AVSTREAM_PARSE_HEADERS;
866 } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
867 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
868 if (st->codec->codec_id == CODEC_ID_NONE)
869 st->codec->codec_id = container_ul->id;
870 st->codec->channels = descriptor->channels;
871 st->codec->bits_per_sample = descriptor->bits_per_sample;
872 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
873 /* TODO: implement CODEC_ID_RAWAUDIO */
874 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
875 if (descriptor->bits_per_sample == 24)
876 st->codec->codec_id = CODEC_ID_PCM_S24LE;
877 else if (descriptor->bits_per_sample == 32)
878 st->codec->codec_id = CODEC_ID_PCM_S32LE;
879 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
880 if (descriptor->bits_per_sample == 24)
881 st->codec->codec_id = CODEC_ID_PCM_S24BE;
882 else if (descriptor->bits_per_sample == 32)
883 st->codec->codec_id = CODEC_ID_PCM_S32BE;
884 } else if (st->codec->codec_id == CODEC_ID_MP2) {
885 st->need_parsing = AVSTREAM_PARSE_FULL;
886 }
887 }
888 if (st->codec->codec_type != CODEC_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
889 av_log(mxf->fc, AV_LOG_WARNING, "only frame wrapped mappings are correctly supported\n");
890 st->need_parsing = AVSTREAM_PARSE_FULL;
891 }
892 }
893 return 0;
894}
895
896static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
897 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
898 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
899 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
900 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
901 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
902 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
903 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
904 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
905 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
906 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
907 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
908 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
909 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
910 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
911 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
912 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
913 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
914};
915
916static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
917{
918 ByteIOContext *pb = mxf->fc->pb;
919 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
920 uint64_t klv_end = url_ftell(pb) + klv->length;
921
922 if (!ctx)
923 return -1;
924 while (url_ftell(pb) + 4 < klv_end) {
925 int tag = get_be16(pb);
926 int size = get_be16(pb); /* KLV specified by 0x53 */
927 uint64_t next = url_ftell(pb) + size;
928 UID uid = {0};
929
930 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
931 av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
932 continue;
933 }
934 if (tag > 0x7FFF) { /* dynamic tag */
935 int i;
936 for (i = 0; i < mxf->local_tags_count; i++) {
937 int local_tag = AV_RB16(mxf->local_tags+i*18);
938 if (local_tag == tag) {
939 memcpy(uid, mxf->local_tags+i*18+2, 16);
940 dprintf(mxf->fc, "local tag 0x%04X\n", local_tag);
941#ifdef DEBUG
942 PRINT_KEY(mxf->fc, "uid", uid);
943#endif
944 }
945 }
946 }
947 if (ctx_size && tag == 0x3C0A)
948 get_buffer(pb, ctx->uid, 16);
949 else if (read_child(ctx, pb, tag, size, uid) < 0)
950 return -1;
951
952 url_fseek(pb, next, SEEK_SET);
953 }
954 if (ctx_size) ctx->type = type;
955 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
956}
957
958static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
959{
960 MXFContext *mxf = s->priv_data;
961 KLVPacket klv;
962
963 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
964 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
965 return -1;
966 }
967 url_fseek(s->pb, -14, SEEK_CUR);
968 mxf->fc = s;
969 while (!url_feof(s->pb)) {
970 const MXFMetadataReadTableEntry *metadata;
971
972 if (klv_read_packet(&klv, s->pb) < 0)
973 return -1;
974#ifdef DEBUG
975 PRINT_KEY(s, "read header", klv.key);
976#endif
977 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
978 IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
979 /* FIXME avoid seek */
980 url_fseek(s->pb, klv.offset, SEEK_SET);
981 break;
982 }
983
984 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
985 if (IS_KLV_KEY(klv.key, metadata->key)) {
986 int (*read)() = klv.key[5] == 0x53 ? mxf_read_local_tags : metadata->read;
987 if (read(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
988 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
989 return -1;
990 }
991 break;
992 }
993 }
994 if (!metadata->read)
995 url_fskip(s->pb, klv.length);
996 }
997 return mxf_parse_structural_metadata(mxf);
998}
999
1000static int mxf_read_close(AVFormatContext *s)
1001{
1002 MXFContext *mxf = s->priv_data;
1003 int i;
1004
1005 av_freep(&mxf->packages_refs);
1006 for (i = 0; i < mxf->metadata_sets_count; i++) {
1007 switch (mxf->metadata_sets[i]->type) {
1008 case MultipleDescriptor:
1009 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1010 break;
1011 case Sequence:
1012 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1013 break;
1014 case SourcePackage:
1015 case MaterialPackage:
1016 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1017 break;
1018 case Track:
1019 mxf->metadata_sets[i] = NULL; /* will be freed later */
1020 break;
1021 default:
1022 break;
1023 }
1024 av_freep(&mxf->metadata_sets[i]);
1025 }
1026 av_freep(&mxf->metadata_sets);
1027 av_freep(&mxf->aesc);
1028 av_freep(&mxf->local_tags);
1029 return 0;
1030}
1031
1032static int mxf_probe(AVProbeData *p) {
1033 uint8_t *bufp = p->buf;
1034 uint8_t *end = p->buf + p->buf_size;
1035
1036 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1037 return 0;
1038
1039 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1040 end -= sizeof(mxf_header_partition_pack_key);
1041 for (; bufp < end; bufp++) {
1042 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1043 return AVPROBE_SCORE_MAX;
1044 }
1045 return 0;
1046}
1047
1048/* rudimentary byte seek */
1049/* XXX: use MXF Index */
1050static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1051{
1052 AVStream *st = s->streams[stream_index];
1053 int64_t seconds;
1054
1055 if (!s->bit_rate)
1056 return -1;
1057 if (sample_time < 0)
1058 sample_time = 0;
1059 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1060 url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1061 av_update_cur_dts(s, st, sample_time);
1062 return 0;
1063}
1064
1065AVInputFormat mxf_demuxer = {
1066 "mxf",
1067 NULL_IF_CONFIG_SMALL("Material eXchange Format"),
1068 sizeof(MXFContext),
1069 mxf_probe,
1070 mxf_read_header,
1071 mxf_read_packet,
1072 mxf_read_close,
1073 mxf_read_seek,
1074};