mxfdec: Check eof_reached in mxf_read_local_tags()
[libav.git] / libavformat / mxfdec.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 Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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 "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
51 #include "avformat.h"
52 #include "internal.h"
53 #include "mxf.h"
54
55 typedef enum {
56 Header,
57 BodyPartition,
58 Footer
59 } MXFPartitionType;
60
61 typedef enum {
62 OP1a,
63 OP1b,
64 OP1c,
65 OP2a,
66 OP2b,
67 OP2c,
68 OP3a,
69 OP3b,
70 OP3c,
71 OPAtom,
72 OPSonyOpt, /* FATE sample, violates the spec in places */
73 } MXFOP;
74
75 typedef struct {
76 int closed;
77 int complete;
78 MXFPartitionType type;
79 uint64_t previous_partition;
80 int index_sid;
81 int body_sid;
82 int64_t this_partition;
83 int64_t essence_offset; ///< absolute offset of essence
84 int64_t essence_length;
85 int32_t kag_size;
86 int64_t header_byte_count;
87 int64_t index_byte_count;
88 int pack_length;
89 } MXFPartition;
90
91 typedef struct {
92 UID uid;
93 enum MXFMetadataSetType type;
94 UID source_container_ul;
95 } MXFCryptoContext;
96
97 typedef struct {
98 UID uid;
99 enum MXFMetadataSetType type;
100 UID source_package_uid;
101 UID data_definition_ul;
102 int64_t duration;
103 int64_t start_position;
104 int source_track_id;
105 } MXFStructuralComponent;
106
107 typedef struct {
108 UID uid;
109 enum MXFMetadataSetType type;
110 UID data_definition_ul;
111 UID *structural_components_refs;
112 int structural_components_count;
113 int64_t duration;
114 } MXFSequence;
115
116 typedef struct {
117 UID uid;
118 enum MXFMetadataSetType type;
119 MXFSequence *sequence; /* mandatory, and only one */
120 UID sequence_ref;
121 int track_id;
122 uint8_t track_number[4];
123 AVRational edit_rate;
124 } MXFTrack;
125
126 typedef struct {
127 UID uid;
128 enum MXFMetadataSetType type;
129 UID essence_container_ul;
130 UID essence_codec_ul;
131 AVRational sample_rate;
132 AVRational aspect_ratio;
133 int width;
134 int height;
135 int channels;
136 int bits_per_sample;
137 UID *sub_descriptors_refs;
138 int sub_descriptors_count;
139 int linked_track_id;
140 uint8_t *extradata;
141 int extradata_size;
142 enum PixelFormat pix_fmt;
143 } MXFDescriptor;
144
145 typedef struct {
146 UID uid;
147 enum MXFMetadataSetType type;
148 int edit_unit_byte_count;
149 int index_sid;
150 int body_sid;
151 AVRational index_edit_rate;
152 uint64_t index_start_position;
153 uint64_t index_duration;
154 int8_t *temporal_offset_entries;
155 int *flag_entries;
156 uint64_t *stream_offset_entries;
157 int nb_index_entries;
158 } MXFIndexTableSegment;
159
160 typedef struct {
161 UID uid;
162 enum MXFMetadataSetType type;
163 UID package_uid;
164 UID *tracks_refs;
165 int tracks_count;
166 MXFDescriptor *descriptor; /* only one */
167 UID descriptor_ref;
168 } MXFPackage;
169
170 typedef struct {
171 UID uid;
172 enum MXFMetadataSetType type;
173 } MXFMetadataSet;
174
175 /* decoded index table */
176 typedef struct {
177 int index_sid;
178 int body_sid;
179 int nb_ptses; /* number of PTSes or total duration of index */
180 int64_t first_dts; /* DTS = EditUnit + first_dts */
181 int64_t *ptses; /* maps EditUnit -> PTS */
182 int nb_segments;
183 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
184 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
185 } MXFIndexTable;
186
187 typedef struct {
188 MXFPartition *partitions;
189 unsigned partitions_count;
190 MXFOP op;
191 UID *packages_refs;
192 int packages_count;
193 MXFMetadataSet **metadata_sets;
194 int metadata_sets_count;
195 AVFormatContext *fc;
196 struct AVAES *aesc;
197 uint8_t *local_tags;
198 int local_tags_count;
199 uint64_t footer_partition;
200 KLVPacket current_klv_data;
201 int current_klv_index;
202 int run_in;
203 MXFPartition *current_partition;
204 int parsing_backward;
205 int64_t last_forward_tell;
206 int last_forward_partition;
207 int current_edit_unit;
208 int nb_index_tables;
209 MXFIndexTable *index_tables;
210 } MXFContext;
211
212 enum MXFWrappingScheme {
213 Frame,
214 Clip,
215 };
216
217 /* NOTE: klv_offset is not set (-1) for local keys */
218 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
219
220 typedef struct {
221 const UID key;
222 MXFMetadataReadFunc *read;
223 int ctx_size;
224 enum MXFMetadataSetType type;
225 } MXFMetadataReadTableEntry;
226
227 /* partial keys to match */
228 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
229 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
230 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
231 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
232 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
233 /* complete keys to match */
234 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
235 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
236 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
237 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
238
239 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
240
241 static int64_t klv_decode_ber_length(AVIOContext *pb)
242 {
243 uint64_t size = avio_r8(pb);
244 if (size & 0x80) { /* long form */
245 int bytes_num = size & 0x7f;
246 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
247 if (bytes_num > 8)
248 return AVERROR_INVALIDDATA;
249 size = 0;
250 while (bytes_num--)
251 size = size << 8 | avio_r8(pb);
252 }
253 return size;
254 }
255
256 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
257 {
258 int i, b;
259 for (i = 0; i < size && !pb->eof_reached; i++) {
260 b = avio_r8(pb);
261 if (b == key[0])
262 i = 0;
263 else if (b != key[i])
264 i = -1;
265 }
266 return i == size;
267 }
268
269 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
270 {
271 if (!mxf_read_sync(pb, mxf_klv_key, 4))
272 return AVERROR_INVALIDDATA;
273 klv->offset = avio_tell(pb) - 4;
274 memcpy(klv->key, mxf_klv_key, 4);
275 avio_read(pb, klv->key + 4, 12);
276 klv->length = klv_decode_ber_length(pb);
277 return klv->length == -1 ? -1 : 0;
278 }
279
280 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
281 {
282 int i;
283
284 for (i = 0; i < s->nb_streams; i++) {
285 MXFTrack *track = s->streams[i]->priv_data;
286 /* SMPTE 379M 7.3 */
287 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
288 return i;
289 }
290 /* return 0 if only one stream, for OP Atom files with 0 as track number */
291 return s->nb_streams == 1 ? 0 : -1;
292 }
293
294 /* XXX: use AVBitStreamFilter */
295 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
296 {
297 const uint8_t *buf_ptr, *end_ptr;
298 uint8_t *data_ptr;
299 int i;
300
301 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
302 return AVERROR_INVALIDDATA;
303 length = av_get_packet(pb, pkt, length);
304 if (length < 0)
305 return length;
306 data_ptr = pkt->data;
307 end_ptr = pkt->data + length;
308 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
309 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
310 for (i = 0; i < st->codec->channels; i++) {
311 uint32_t sample = bytestream_get_le32(&buf_ptr);
312 if (st->codec->bits_per_coded_sample == 24)
313 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
314 else
315 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
316 }
317 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
318 }
319 av_shrink_packet(pkt, data_ptr - pkt->data);
320 return 0;
321 }
322
323 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
324 {
325 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
326 MXFContext *mxf = s->priv_data;
327 AVIOContext *pb = s->pb;
328 int64_t end = avio_tell(pb) + klv->length;
329 int64_t size;
330 uint64_t orig_size;
331 uint64_t plaintext_size;
332 uint8_t ivec[16];
333 uint8_t tmpbuf[16];
334 int index;
335
336 if (!mxf->aesc && s->key && s->keylen == 16) {
337 mxf->aesc = av_malloc(av_aes_size);
338 if (!mxf->aesc)
339 return AVERROR(ENOMEM);
340 av_aes_init(mxf->aesc, s->key, 128, 1);
341 }
342 // crypto context
343 avio_skip(pb, klv_decode_ber_length(pb));
344 // plaintext offset
345 klv_decode_ber_length(pb);
346 plaintext_size = avio_rb64(pb);
347 // source klv key
348 klv_decode_ber_length(pb);
349 avio_read(pb, klv->key, 16);
350 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
351 return AVERROR_INVALIDDATA;
352 index = mxf_get_stream_index(s, klv);
353 if (index < 0)
354 return AVERROR_INVALIDDATA;
355 // source size
356 klv_decode_ber_length(pb);
357 orig_size = avio_rb64(pb);
358 if (orig_size < plaintext_size)
359 return AVERROR_INVALIDDATA;
360 // enc. code
361 size = klv_decode_ber_length(pb);
362 if (size < 32 || size - 32 < orig_size)
363 return AVERROR_INVALIDDATA;
364 avio_read(pb, ivec, 16);
365 avio_read(pb, tmpbuf, 16);
366 if (mxf->aesc)
367 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
368 if (memcmp(tmpbuf, checkv, 16))
369 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
370 size -= 32;
371 size = av_get_packet(pb, pkt, size);
372 if (size < 0)
373 return size;
374 else if (size < plaintext_size)
375 return AVERROR_INVALIDDATA;
376 size -= plaintext_size;
377 if (mxf->aesc)
378 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
379 &pkt->data[plaintext_size], size >> 4, ivec, 1);
380 av_shrink_packet(pkt, orig_size);
381 pkt->stream_index = index;
382 avio_skip(pb, end - avio_tell(pb));
383 return 0;
384 }
385
386 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
387 {
388 MXFContext *mxf = arg;
389 int item_num = avio_rb32(pb);
390 int item_len = avio_rb32(pb);
391
392 if (item_len != 18) {
393 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
394 item_len);
395 return AVERROR_PATCHWELCOME;
396 }
397 if (item_num > UINT_MAX / item_len)
398 return AVERROR_INVALIDDATA;
399 mxf->local_tags_count = item_num;
400 mxf->local_tags = av_malloc(item_num*item_len);
401 if (!mxf->local_tags)
402 return AVERROR(ENOMEM);
403 avio_read(pb, mxf->local_tags, item_num*item_len);
404 return 0;
405 }
406
407 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
408 {
409 MXFContext *mxf = arg;
410 MXFPartition *partition, *tmp_part;
411 UID op;
412 uint64_t footer_partition;
413
414 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
415 return AVERROR(ENOMEM);
416
417 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
418 if (!tmp_part)
419 return AVERROR(ENOMEM);
420 mxf->partitions = tmp_part;
421
422 if (mxf->parsing_backward) {
423 /* insert the new partition pack in the middle
424 * this makes the entries in mxf->partitions sorted by offset */
425 memmove(&mxf->partitions[mxf->last_forward_partition+1],
426 &mxf->partitions[mxf->last_forward_partition],
427 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
428 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
429 } else {
430 mxf->last_forward_partition++;
431 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
432 }
433
434 memset(partition, 0, sizeof(*partition));
435 mxf->partitions_count++;
436 partition->pack_length = avio_tell(pb) - klv_offset + size;
437
438 switch(uid[13]) {
439 case 2:
440 partition->type = Header;
441 break;
442 case 3:
443 partition->type = BodyPartition;
444 break;
445 case 4:
446 partition->type = Footer;
447 break;
448 default:
449 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
450 return AVERROR_INVALIDDATA;
451 }
452
453 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
454 partition->closed = partition->type == Footer || !(uid[14] & 1);
455 partition->complete = uid[14] > 2;
456 avio_skip(pb, 4);
457 partition->kag_size = avio_rb32(pb);
458 partition->this_partition = avio_rb64(pb);
459 partition->previous_partition = avio_rb64(pb);
460 footer_partition = avio_rb64(pb);
461 partition->header_byte_count = avio_rb64(pb);
462 partition->index_byte_count = avio_rb64(pb);
463 partition->index_sid = avio_rb32(pb);
464 avio_skip(pb, 8);
465 partition->body_sid = avio_rb32(pb);
466 avio_read(pb, op, sizeof(UID));
467
468 /* some files don'thave FooterPartition set in every partition */
469 if (footer_partition) {
470 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
471 av_log(mxf->fc, AV_LOG_ERROR,
472 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
473 mxf->footer_partition, footer_partition);
474 } else {
475 mxf->footer_partition = footer_partition;
476 }
477 }
478
479 av_dlog(mxf->fc,
480 "PartitionPack: ThisPartition = 0x%"PRIX64
481 ", PreviousPartition = 0x%"PRIX64", "
482 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
483 partition->this_partition,
484 partition->previous_partition, footer_partition,
485 partition->index_sid, partition->body_sid);
486
487 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
488 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
489 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
490 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
491 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
492 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
493 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
494 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
495 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
496 else if (op[12] == 0x10) mxf->op = OPAtom;
497 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
498 else {
499 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
500 mxf->op = OP1a;
501 }
502
503 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
504 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
505
506 if (mxf->op == OPSonyOpt)
507 partition->kag_size = 512;
508 else
509 partition->kag_size = 1;
510
511 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
512 }
513
514 return 0;
515 }
516
517 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
518 {
519 MXFMetadataSet **tmp;
520 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
521 return AVERROR(ENOMEM);
522 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
523 if (!tmp)
524 return AVERROR(ENOMEM);
525 mxf->metadata_sets = tmp;
526 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
527 mxf->metadata_sets_count++;
528 return 0;
529 }
530
531 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
532 {
533 MXFCryptoContext *cryptocontext = arg;
534 if (size != 16)
535 return AVERROR_INVALIDDATA;
536 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
537 avio_read(pb, cryptocontext->source_container_ul, 16);
538 return 0;
539 }
540
541 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
542 {
543 MXFContext *mxf = arg;
544 switch (tag) {
545 case 0x1901:
546 mxf->packages_count = avio_rb32(pb);
547 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
548 return AVERROR_INVALIDDATA;
549 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
550 if (!mxf->packages_refs)
551 return AVERROR(ENOMEM);
552 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
553 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
554 break;
555 }
556 return 0;
557 }
558
559 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
560 {
561 MXFStructuralComponent *source_clip = arg;
562 switch(tag) {
563 case 0x0202:
564 source_clip->duration = avio_rb64(pb);
565 break;
566 case 0x1201:
567 source_clip->start_position = avio_rb64(pb);
568 break;
569 case 0x1101:
570 /* UMID, only get last 16 bytes */
571 avio_skip(pb, 16);
572 avio_read(pb, source_clip->source_package_uid, 16);
573 break;
574 case 0x1102:
575 source_clip->source_track_id = avio_rb32(pb);
576 break;
577 }
578 return 0;
579 }
580
581 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
582 {
583 MXFPackage *package = arg;
584 switch(tag) {
585 case 0x4403:
586 package->tracks_count = avio_rb32(pb);
587 if (package->tracks_count >= UINT_MAX / sizeof(UID))
588 return AVERROR_INVALIDDATA;
589 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
590 if (!package->tracks_refs)
591 return AVERROR(ENOMEM);
592 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
593 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
594 break;
595 }
596 return 0;
597 }
598
599 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
600 {
601 MXFTrack *track = arg;
602 switch(tag) {
603 case 0x4801:
604 track->track_id = avio_rb32(pb);
605 break;
606 case 0x4804:
607 avio_read(pb, track->track_number, 4);
608 break;
609 case 0x4B01:
610 track->edit_rate.den = avio_rb32(pb);
611 track->edit_rate.num = avio_rb32(pb);
612 break;
613 case 0x4803:
614 avio_read(pb, track->sequence_ref, 16);
615 break;
616 }
617 return 0;
618 }
619
620 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
621 {
622 MXFSequence *sequence = arg;
623 switch(tag) {
624 case 0x0202:
625 sequence->duration = avio_rb64(pb);
626 break;
627 case 0x0201:
628 avio_read(pb, sequence->data_definition_ul, 16);
629 break;
630 case 0x1001:
631 sequence->structural_components_count = avio_rb32(pb);
632 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
633 return AVERROR_INVALIDDATA;
634 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
635 if (!sequence->structural_components_refs)
636 return AVERROR(ENOMEM);
637 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
638 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
639 break;
640 }
641 return 0;
642 }
643
644 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
645 {
646 MXFPackage *package = arg;
647 switch(tag) {
648 case 0x4403:
649 package->tracks_count = avio_rb32(pb);
650 if (package->tracks_count >= UINT_MAX / sizeof(UID))
651 return AVERROR_INVALIDDATA;
652 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
653 if (!package->tracks_refs)
654 return AVERROR(ENOMEM);
655 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
656 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
657 break;
658 case 0x4401:
659 /* UMID, only get last 16 bytes */
660 avio_skip(pb, 16);
661 avio_read(pb, package->package_uid, 16);
662 break;
663 case 0x4701:
664 avio_read(pb, package->descriptor_ref, 16);
665 break;
666 }
667 return 0;
668 }
669
670 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
671 {
672 int i, length;
673
674 segment->nb_index_entries = avio_rb32(pb);
675 if (!segment->nb_index_entries)
676 return 0;
677 else if (segment->nb_index_entries < 0 ||
678 segment->nb_index_entries >
679 (INT_MAX >> av_log2(sizeof(*segment->stream_offset_entries))))
680 return AVERROR(ENOMEM);
681
682 length = avio_rb32(pb);
683
684 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
685 sizeof(*segment->temporal_offset_entries));
686 segment->flag_entries = av_mallocz(segment->nb_index_entries *
687 sizeof(*segment->flag_entries));
688 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
689 sizeof(*segment->stream_offset_entries));
690
691 if (!segment->flag_entries || !segment->stream_offset_entries ||
692 !segment->temporal_offset_entries) {
693 av_freep(&segment->flag_entries);
694 av_freep(&segment->stream_offset_entries);
695 av_freep(&segment->temporal_offset_entries);
696 return AVERROR(ENOMEM);
697 }
698
699 for (i = 0; i < segment->nb_index_entries; i++) {
700 segment->temporal_offset_entries[i] = avio_r8(pb);
701 avio_r8(pb); /* KeyFrameOffset */
702 segment->flag_entries[i] = avio_r8(pb);
703 segment->stream_offset_entries[i] = avio_rb64(pb);
704 avio_skip(pb, length - 11);
705 }
706 return 0;
707 }
708
709 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
710 {
711 MXFIndexTableSegment *segment = arg;
712 switch(tag) {
713 case 0x3F05:
714 segment->edit_unit_byte_count = avio_rb32(pb);
715 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
716 break;
717 case 0x3F06:
718 segment->index_sid = avio_rb32(pb);
719 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
720 break;
721 case 0x3F07:
722 segment->body_sid = avio_rb32(pb);
723 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
724 break;
725 case 0x3F0A:
726 av_dlog(NULL, "IndexEntryArray found\n");
727 return mxf_read_index_entry_array(pb, segment);
728 case 0x3F0B:
729 segment->index_edit_rate.num = avio_rb32(pb);
730 segment->index_edit_rate.den = avio_rb32(pb);
731 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
732 segment->index_edit_rate.den);
733 break;
734 case 0x3F0C:
735 segment->index_start_position = avio_rb64(pb);
736 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
737 break;
738 case 0x3F0D:
739 segment->index_duration = avio_rb64(pb);
740 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
741 break;
742 }
743 return 0;
744 }
745
746 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
747 {
748 int code, value, ofs = 0;
749 char layout[16] = {0};
750
751 do {
752 code = avio_r8(pb);
753 value = avio_r8(pb);
754 av_dlog(NULL, "pixel layout: code %#x\n", code);
755
756 if (ofs < 16) {
757 layout[ofs++] = code;
758 layout[ofs++] = value;
759 }
760 } while (code != 0); /* SMPTE 377M E.2.46 */
761
762 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
763 }
764
765 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
766 {
767 MXFDescriptor *descriptor = arg;
768 switch(tag) {
769 case 0x3F01:
770 descriptor->sub_descriptors_count = avio_rb32(pb);
771 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
772 return AVERROR_INVALIDDATA;
773 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
774 if (!descriptor->sub_descriptors_refs)
775 return AVERROR(ENOMEM);
776 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
777 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
778 break;
779 case 0x3004:
780 avio_read(pb, descriptor->essence_container_ul, 16);
781 break;
782 case 0x3006:
783 descriptor->linked_track_id = avio_rb32(pb);
784 break;
785 case 0x3201: /* PictureEssenceCoding */
786 avio_read(pb, descriptor->essence_codec_ul, 16);
787 break;
788 case 0x3203:
789 descriptor->width = avio_rb32(pb);
790 break;
791 case 0x3202:
792 descriptor->height = avio_rb32(pb);
793 break;
794 case 0x320E:
795 descriptor->aspect_ratio.num = avio_rb32(pb);
796 descriptor->aspect_ratio.den = avio_rb32(pb);
797 break;
798 case 0x3D03:
799 descriptor->sample_rate.num = avio_rb32(pb);
800 descriptor->sample_rate.den = avio_rb32(pb);
801 break;
802 case 0x3D06: /* SoundEssenceCompression */
803 avio_read(pb, descriptor->essence_codec_ul, 16);
804 break;
805 case 0x3D07:
806 descriptor->channels = avio_rb32(pb);
807 break;
808 case 0x3D01:
809 descriptor->bits_per_sample = avio_rb32(pb);
810 break;
811 case 0x3401:
812 mxf_read_pixel_layout(pb, descriptor);
813 break;
814 default:
815 /* Private uid used by SONY C0023S01.mxf */
816 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
817 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
818 if (!descriptor->extradata)
819 return AVERROR(ENOMEM);
820 descriptor->extradata_size = size;
821 avio_read(pb, descriptor->extradata, size);
822 }
823 break;
824 }
825 return 0;
826 }
827
828 /*
829 * Match an uid independently of the version byte and up to len common bytes
830 * Returns: boolean
831 */
832 static int mxf_match_uid(const UID key, const UID uid, int len)
833 {
834 int i;
835 for (i = 0; i < len; i++) {
836 if (i != 7 && key[i] != uid[i])
837 return 0;
838 }
839 return 1;
840 }
841
842 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
843 {
844 while (uls->uid[0]) {
845 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
846 break;
847 uls++;
848 }
849 return uls;
850 }
851
852 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
853 {
854 int i;
855
856 if (!strong_ref)
857 return NULL;
858 for (i = 0; i < mxf->metadata_sets_count; i++) {
859 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
860 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
861 return mxf->metadata_sets[i];
862 }
863 }
864 return NULL;
865 }
866
867 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
868 // video essence container uls
869 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
870 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
871 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
872 };
873 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
874 // sound essence container uls
875 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
876 { { 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 */
877 { { 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 */
878 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
879 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
880 };
881
882 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
883 {
884 int i, j, nb_segments = 0;
885 MXFIndexTableSegment **unsorted_segments;
886 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
887
888 /* count number of segments, allocate arrays and copy unsorted segments */
889 for (i = 0; i < mxf->metadata_sets_count; i++)
890 if (mxf->metadata_sets[i]->type == IndexTableSegment)
891 nb_segments++;
892
893 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
894 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
895 if (!sorted_segments || !unsorted_segments) {
896 av_freep(sorted_segments);
897 av_free(unsorted_segments);
898 return AVERROR(ENOMEM);
899 }
900
901 for (i = j = 0; i < mxf->metadata_sets_count; i++)
902 if (mxf->metadata_sets[i]->type == IndexTableSegment)
903 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
904
905 *nb_sorted_segments = 0;
906
907 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
908 for (i = 0; i < nb_segments; i++) {
909 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
910
911 for (j = 0; j < nb_segments; j++) {
912 MXFIndexTableSegment *s = unsorted_segments[j];
913
914 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
915 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
916 */
917 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
918 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
919 best = j;
920 best_body_sid = s->body_sid;
921 best_index_sid = s->index_sid;
922 best_index_start = s->index_start_position;
923 }
924 }
925
926 /* no suitable entry found -> we're done */
927 if (best == -1)
928 break;
929
930 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
931 last_body_sid = best_body_sid;
932 last_index_sid = best_index_sid;
933 last_index_start = best_index_start;
934 }
935
936 av_free(unsorted_segments);
937
938 return 0;
939 }
940
941 /**
942 * Computes the absolute file offset of the given essence container offset
943 */
944 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
945 {
946 int x;
947 int64_t offset_in = offset; /* for logging */
948
949 for (x = 0; x < mxf->partitions_count; x++) {
950 MXFPartition *p = &mxf->partitions[x];
951
952 if (p->body_sid != body_sid)
953 continue;
954
955 if (offset < p->essence_length || !p->essence_length) {
956 *offset_out = p->essence_offset + offset;
957 return 0;
958 }
959
960 offset -= p->essence_length;
961 }
962
963 av_log(mxf->fc, AV_LOG_ERROR,
964 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
965 offset_in, body_sid);
966
967 return AVERROR_INVALIDDATA;
968 }
969
970 /**
971 * Returns the end position of the essence container with given BodySID, or zero if unknown
972 */
973 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
974 {
975 int x;
976 int64_t ret = 0;
977
978 for (x = 0; x < mxf->partitions_count; x++) {
979 MXFPartition *p = &mxf->partitions[x];
980
981 if (p->body_sid != body_sid)
982 continue;
983
984 if (!p->essence_length)
985 return 0;
986
987 ret = p->essence_offset + p->essence_length;
988 }
989
990 return ret;
991 }
992
993 /* EditUnit -> absolute offset */
994 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
995 {
996 int i;
997 int64_t offset_temp = 0;
998
999 for (i = 0; i < index_table->nb_segments; i++) {
1000 MXFIndexTableSegment *s = index_table->segments[i];
1001
1002 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1003
1004 if (edit_unit < s->index_start_position + s->index_duration) {
1005 int64_t index = edit_unit - s->index_start_position;
1006
1007 if (s->edit_unit_byte_count)
1008 offset_temp += s->edit_unit_byte_count * index;
1009 else if (s->nb_index_entries) {
1010 if (s->nb_index_entries == 2 * s->index_duration + 1)
1011 index *= 2; /* Avid index */
1012
1013 if (index < 0 || index > s->nb_index_entries) {
1014 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1015 index_table->index_sid, s->index_start_position);
1016 return AVERROR_INVALIDDATA;
1017 }
1018
1019 offset_temp = s->stream_offset_entries[index];
1020 } else {
1021 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1022 index_table->index_sid, s->index_start_position);
1023 return AVERROR_INVALIDDATA;
1024 }
1025
1026 if (edit_unit_out)
1027 *edit_unit_out = edit_unit;
1028
1029 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1030 } else {
1031 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1032 offset_temp += s->edit_unit_byte_count * s->index_duration;
1033 }
1034 }
1035
1036 if (nag)
1037 av_log(mxf->fc, AV_LOG_ERROR, "failed to map EditUnit %"PRId64" in IndexSID %i to an offset\n", edit_unit, index_table->index_sid);
1038
1039 return AVERROR_INVALIDDATA;
1040 }
1041
1042 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1043 {
1044 int i, j, x;
1045 int8_t max_temporal_offset = -128;
1046
1047 /* first compute how many entries we have */
1048 for (i = 0; i < index_table->nb_segments; i++) {
1049 MXFIndexTableSegment *s = index_table->segments[i];
1050
1051 if (!s->nb_index_entries)
1052 return 0; /* no TemporalOffsets */
1053
1054 index_table->nb_ptses += s->index_duration;
1055 }
1056
1057 /* paranoid check */
1058 if (index_table->nb_ptses <= 0)
1059 return 0;
1060
1061 if (index_table->nb_ptses > INT_MAX >> av_log2(sizeof(AVIndexEntry)) + 1)
1062 return AVERROR(ENOMEM);
1063
1064 index_table->ptses = av_mallocz(index_table->nb_ptses *
1065 sizeof(int64_t));
1066 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1067 sizeof(AVIndexEntry));
1068 if (!index_table->ptses || !index_table->fake_index) {
1069 av_freep(&index_table->ptses);
1070 return AVERROR(ENOMEM);
1071 }
1072
1073 /* we may have a few bad TemporalOffsets
1074 * make sure the corresponding PTSes don't have the bogus value 0 */
1075 for (x = 0; x < index_table->nb_ptses; x++)
1076 index_table->ptses[x] = AV_NOPTS_VALUE;
1077
1078 /**
1079 * We have this:
1080 *
1081 * x TemporalOffset
1082 * 0: 0
1083 * 1: 1
1084 * 2: 1
1085 * 3: -2
1086 * 4: 1
1087 * 5: 1
1088 * 6: -2
1089 *
1090 * We want to transform it into this:
1091 *
1092 * x DTS PTS
1093 * 0: -1 0
1094 * 1: 0 3
1095 * 2: 1 1
1096 * 3: 2 2
1097 * 4: 3 6
1098 * 5: 4 4
1099 * 6: 5 5
1100 *
1101 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1102 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1103 * The latter makes DTS <= PTS.
1104 */
1105 for (i = x = 0; i < index_table->nb_segments; i++) {
1106 MXFIndexTableSegment *s = index_table->segments[i];
1107 int index_delta = 1;
1108
1109 if (s->nb_index_entries == 2 * s->index_duration + 1)
1110 index_delta = 2; /* Avid index */
1111
1112 for (j = 0; j < s->nb_index_entries; j += index_delta, x++) {
1113 int offset = s->temporal_offset_entries[j] / index_delta;
1114 int index = x + offset;
1115
1116 if (x >= index_table->nb_ptses) {
1117 av_log(mxf->fc, AV_LOG_ERROR,
1118 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1119 s->nb_index_entries, s->index_duration);
1120 break;
1121 }
1122
1123 index_table->fake_index[x].timestamp = x;
1124 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1125
1126 if (index < 0 || index >= index_table->nb_ptses) {
1127 av_log(mxf->fc, AV_LOG_ERROR,
1128 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1129 x, offset, index);
1130 continue;
1131 }
1132
1133 index_table->ptses[index] = x;
1134 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1135 }
1136 }
1137
1138 index_table->first_dts = -max_temporal_offset;
1139
1140 return 0;
1141 }
1142
1143 /**
1144 * Sorts and collects index table segments into index tables.
1145 * Also computes PTSes if possible.
1146 */
1147 static int mxf_compute_index_tables(MXFContext *mxf)
1148 {
1149 int i, j, k, ret, nb_sorted_segments;
1150 MXFIndexTableSegment **sorted_segments = NULL;
1151
1152 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1153 nb_sorted_segments <= 0) {
1154 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1155 return 0;
1156 }
1157
1158 /* sanity check and count unique BodySIDs/IndexSIDs */
1159 for (i = 0; i < nb_sorted_segments; i++) {
1160 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1161 mxf->nb_index_tables++;
1162 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1163 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1164 ret = AVERROR_INVALIDDATA;
1165 goto finish_decoding_index;
1166 }
1167 }
1168
1169 if (mxf->nb_index_tables > INT_MAX >> av_log2(sizeof(MXFIndexTable)) + 1 ||
1170 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1171 sizeof(MXFIndexTable)))) {
1172 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1173 ret = AVERROR(ENOMEM);
1174 goto finish_decoding_index;
1175 }
1176
1177 /* distribute sorted segments to index tables */
1178 for (i = j = 0; i < nb_sorted_segments; i++) {
1179 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1180 /* next IndexSID */
1181 j++;
1182 }
1183
1184 mxf->index_tables[j].nb_segments++;
1185 }
1186
1187 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1188 MXFIndexTable *t = &mxf->index_tables[j];
1189
1190 if (t->nb_segments >
1191 (INT_MAX >> av_log2(sizeof(MXFIndexTableSegment *))) ||
1192 !(t->segments = av_mallocz(t->nb_segments *
1193 sizeof(MXFIndexTableSegment*)))) {
1194 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1195 " pointer array\n");
1196 ret = AVERROR(ENOMEM);
1197 goto finish_decoding_index;
1198 }
1199
1200 if (sorted_segments[i]->index_start_position)
1201 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1202 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1203
1204 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1205 t->index_sid = sorted_segments[i]->index_sid;
1206 t->body_sid = sorted_segments[i]->body_sid;
1207
1208 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1209 goto finish_decoding_index;
1210
1211 /* fix zero IndexDurations */
1212 for (k = 0; k < t->nb_segments; k++) {
1213 if (t->segments[k]->index_duration)
1214 continue;
1215
1216 if (t->nb_segments > 1)
1217 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1218 t->index_sid, k);
1219
1220 if (mxf->fc->nb_streams <= 0) {
1221 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1222 break;
1223 }
1224
1225 /* assume the first stream's duration is reasonable
1226 * leave index_duration = 0 on further segments in case we have any (unlikely)
1227 */
1228 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1229 break;
1230 }
1231 }
1232
1233 ret = 0;
1234 finish_decoding_index:
1235 av_free(sorted_segments);
1236 return ret;
1237 }
1238
1239 static int mxf_parse_structural_metadata(MXFContext *mxf)
1240 {
1241 MXFPackage *material_package = NULL;
1242 MXFPackage *temp_package = NULL;
1243 int i, j, k, ret;
1244
1245 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1246 /* TODO: handle multiple material packages (OP3x) */
1247 for (i = 0; i < mxf->packages_count; i++) {
1248 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1249 if (material_package) break;
1250 }
1251 if (!material_package) {
1252 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1253 return AVERROR_INVALIDDATA;
1254 }
1255
1256 for (i = 0; i < material_package->tracks_count; i++) {
1257 MXFPackage *source_package = NULL;
1258 MXFTrack *material_track = NULL;
1259 MXFTrack *source_track = NULL;
1260 MXFTrack *temp_track = NULL;
1261 MXFDescriptor *descriptor = NULL;
1262 MXFStructuralComponent *component = NULL;
1263 UID *essence_container_ul = NULL;
1264 const MXFCodecUL *codec_ul = NULL;
1265 const MXFCodecUL *container_ul = NULL;
1266 AVStream *st;
1267
1268 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1269 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1270 continue;
1271 }
1272
1273 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1274 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1275 continue;
1276 }
1277
1278 /* TODO: handle multiple source clips */
1279 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1280 /* TODO: handle timecode component */
1281 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1282 if (!component)
1283 continue;
1284
1285 for (k = 0; k < mxf->packages_count; k++) {
1286 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1287 if (!temp_package)
1288 continue;
1289 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1290 source_package = temp_package;
1291 break;
1292 }
1293 }
1294 if (!source_package) {
1295 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1296 break;
1297 }
1298 for (k = 0; k < source_package->tracks_count; k++) {
1299 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1300 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1301 ret = AVERROR_INVALIDDATA;
1302 goto fail_and_free;
1303 }
1304 if (temp_track->track_id == component->source_track_id) {
1305 source_track = temp_track;
1306 break;
1307 }
1308 }
1309 if (!source_track) {
1310 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1311 break;
1312 }
1313 }
1314 if (!source_track || !component)
1315 continue;
1316
1317 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1318 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1319 ret = AVERROR_INVALIDDATA;
1320 goto fail_and_free;
1321 }
1322
1323 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1324 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1325 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1326 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1327 continue;
1328 }
1329
1330 st = avformat_new_stream(mxf->fc, NULL);
1331 if (!st) {
1332 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1333 ret = AVERROR(ENOMEM);
1334 goto fail_and_free;
1335 }
1336 st->id = source_track->track_id;
1337 st->priv_data = source_track;
1338 st->duration = component->duration;
1339 if (st->duration == -1)
1340 st->duration = AV_NOPTS_VALUE;
1341 st->start_time = component->start_position;
1342 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1343
1344 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1345 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1346 st->codec->codec_type = codec_ul->id;
1347
1348 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1349 if (source_package->descriptor) {
1350 if (source_package->descriptor->type == MultipleDescriptor) {
1351 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1352 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1353
1354 if (!sub_descriptor) {
1355 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1356 continue;
1357 }
1358 if (sub_descriptor->linked_track_id == source_track->track_id) {
1359 descriptor = sub_descriptor;
1360 break;
1361 }
1362 }
1363 } else if (source_package->descriptor->type == Descriptor)
1364 descriptor = source_package->descriptor;
1365 }
1366 if (!descriptor) {
1367 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1368 continue;
1369 }
1370 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1371 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1372 essence_container_ul = &descriptor->essence_container_ul;
1373 /* HACK: replacing the original key with mxf_encrypted_essence_container
1374 * is not allowed according to s429-6, try to find correct information anyway */
1375 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1376 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1377 for (k = 0; k < mxf->metadata_sets_count; k++) {
1378 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1379 if (metadata->type == CryptoContext) {
1380 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1381 break;
1382 }
1383 }
1384 }
1385
1386 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1387 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1388 st->codec->codec_id = codec_ul->id;
1389 if (descriptor->extradata) {
1390 st->codec->extradata = descriptor->extradata;
1391 st->codec->extradata_size = descriptor->extradata_size;
1392 }
1393 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1394 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1395 if (st->codec->codec_id == CODEC_ID_NONE)
1396 st->codec->codec_id = container_ul->id;
1397 st->codec->width = descriptor->width;
1398 st->codec->height = descriptor->height;
1399 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1400 st->codec->pix_fmt = descriptor->pix_fmt;
1401 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1402 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1403 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1404 if (st->codec->codec_id == CODEC_ID_NONE)
1405 st->codec->codec_id = container_ul->id;
1406 st->codec->channels = descriptor->channels;
1407 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1408 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1409 /* TODO: implement CODEC_ID_RAWAUDIO */
1410 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1411 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1412 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1413 else if (descriptor->bits_per_sample == 32)
1414 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1415 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1416 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1417 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1418 else if (descriptor->bits_per_sample == 32)
1419 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1420 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1421 st->need_parsing = AVSTREAM_PARSE_FULL;
1422 }
1423 }
1424 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1425 /* TODO: decode timestamps */
1426 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1427 }
1428 }
1429
1430 ret = 0;
1431 fail_and_free:
1432 return ret;
1433 }
1434
1435 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1436 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1437 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1438 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1439 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1440 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1441 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1442 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1443 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1444 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1445 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1446 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1447 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1448 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1449 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1450 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1451 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1452 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1453 { { 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 */
1454 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1455 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1456 { { 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 */
1457 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1458 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1459 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1460 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1461 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1462 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1463 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1464 };
1465
1466 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1467 {
1468 AVIOContext *pb = mxf->fc->pb;
1469 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1470 uint64_t klv_end = avio_tell(pb) + klv->length;
1471
1472 if (!ctx)
1473 return AVERROR(ENOMEM);
1474 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1475 int ret;
1476 int tag = avio_rb16(pb);
1477 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1478 uint64_t next = avio_tell(pb) + size;
1479 UID uid = {0};
1480
1481 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1482 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1483 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1484 continue;
1485 }
1486 if (tag > 0x7FFF) { /* dynamic tag */
1487 int i;
1488 for (i = 0; i < mxf->local_tags_count; i++) {
1489 int local_tag = AV_RB16(mxf->local_tags+i*18);
1490 if (local_tag == tag) {
1491 memcpy(uid, mxf->local_tags+i*18+2, 16);
1492 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1493 PRINT_KEY(mxf->fc, "uid", uid);
1494 }
1495 }
1496 }
1497 if (ctx_size && tag == 0x3C0A)
1498 avio_read(pb, ctx->uid, 16);
1499 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1500 return ret;
1501
1502 avio_seek(pb, next, SEEK_SET);
1503 }
1504 if (ctx_size) ctx->type = type;
1505 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1506 }
1507
1508 /**
1509 * Seeks to the previous partition, if possible
1510 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1511 */
1512 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1513 {
1514 AVIOContext *pb = mxf->fc->pb;
1515
1516 if (!mxf->current_partition ||
1517 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1518 return 0; /* we've parsed all partitions */
1519
1520 /* seek to previous partition */
1521 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1522 mxf->current_partition = NULL;
1523
1524 av_dlog(mxf->fc, "seeking to previous partition\n");
1525
1526 return 1;
1527 }
1528
1529 /**
1530 * Called when essence is encountered
1531 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1532 */
1533 static int mxf_parse_handle_essence(MXFContext *mxf)
1534 {
1535 AVIOContext *pb = mxf->fc->pb;
1536 int64_t ret;
1537
1538 if (!mxf->current_partition) {
1539 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to PartitionPack\n");
1540 return AVERROR_INVALIDDATA;
1541 }
1542
1543 if (mxf->parsing_backward) {
1544 return mxf_seek_to_previous_partition(mxf);
1545 } else {
1546 if (!mxf->footer_partition) {
1547 av_dlog(mxf->fc, "no footer\n");
1548 return 0;
1549 }
1550
1551 av_dlog(mxf->fc, "seeking to footer\n");
1552
1553 /* remember where we were so we don't end up seeking further back than this */
1554 mxf->last_forward_tell = avio_tell(pb);
1555
1556 if (!pb->seekable) {
1557 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1558 return -1;
1559 }
1560
1561 /* seek to footer partition and parse backward */
1562 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1563 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1564 mxf->run_in + mxf->footer_partition, ret);
1565 return ret;
1566 }
1567
1568 mxf->current_partition = NULL;
1569 mxf->parsing_backward = 1;
1570 }
1571
1572 return 1;
1573 }
1574
1575 /**
1576 * Called when the next partition or EOF is encountered
1577 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1578 */
1579 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1580 {
1581 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1582 }
1583
1584 /**
1585 * Figure out the proper offset and length of the essence container
1586 * in each partition
1587 */
1588 static void mxf_compute_essence_containers(MXFContext *mxf)
1589 {
1590 int x;
1591
1592 /* everything is already correct */
1593 if (mxf->op == OPAtom)
1594 return;
1595
1596 for (x = 0; x < mxf->partitions_count; x++) {
1597 MXFPartition *p = &mxf->partitions[x];
1598
1599 if (!p->body_sid)
1600 continue; /* BodySID == 0 -> no essence */
1601
1602 if (x >= mxf->partitions_count - 1)
1603 break; /* last partition - can't compute length (and we don't need to) */
1604
1605 /* essence container spans to the next partition */
1606 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1607
1608 if (p->essence_length < 0) {
1609 /* next ThisPartition < essence_offset */
1610 p->essence_length = 0;
1611 av_log(mxf->fc, AV_LOG_ERROR,
1612 "partition %i: bad ThisPartition = %"PRIX64"\n",
1613 x+1, mxf->partitions[x+1].this_partition);
1614 }
1615 }
1616 }
1617
1618 static int64_t round_to_kag(int64_t position, int kag_size)
1619 {
1620 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1621 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1622 int64_t ret = (position / kag_size) * kag_size;
1623 return ret == position ? ret : ret + kag_size;
1624 }
1625
1626 static inline void compute_partition_essence_offset(AVFormatContext *s,
1627 MXFContext *mxf,
1628 KLVPacket *klv)
1629 {
1630 MXFPartition *cur_part = mxf->current_partition;
1631 /* for OP1a we compute essence_offset
1632 * for OPAtom we point essence_offset after the KL
1633 * (usually op1a_essence_offset + 20 or 25)
1634 * TODO: for OP1a we could eliminate this entire if statement, always
1635 * stopping parsing at op1a_essence_offset
1636 * for OPAtom we still need the actual essence_offset though
1637 * (the KL's length can vary)
1638 */
1639 int64_t op1a_essence_offset =
1640 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1641 cur_part->kag_size) +
1642 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1643 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1644
1645 if (mxf->op == OPAtom) {
1646 /* point essence_offset to the actual data
1647 * OPAtom has all the essence in one big KLV
1648 */
1649 cur_part->essence_offset = avio_tell(s->pb);
1650 cur_part->essence_length = klv->length;
1651 } else {
1652 /* NOTE: op1a_essence_offset may be less than to klv.offset
1653 * (C0023S01.mxf) */
1654 cur_part->essence_offset = op1a_essence_offset;
1655 }
1656 }
1657
1658 static int mxf_read_header(AVFormatContext *s)
1659 {
1660 MXFContext *mxf = s->priv_data;
1661 KLVPacket klv;
1662 int64_t essence_offset = 0;
1663 int ret;
1664
1665 mxf->last_forward_tell = INT64_MAX;
1666
1667 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1668 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1669 return AVERROR_INVALIDDATA;
1670 }
1671 avio_seek(s->pb, -14, SEEK_CUR);
1672 mxf->fc = s;
1673 mxf->run_in = avio_tell(s->pb);
1674
1675 while (!s->pb->eof_reached) {
1676 const MXFMetadataReadTableEntry *metadata;
1677
1678 if (klv_read_packet(&klv, s->pb) < 0) {
1679 /* EOF - seek to previous partition or stop */
1680 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1681 break;
1682 else
1683 continue;
1684 }
1685
1686 PRINT_KEY(s, "read header", klv.key);
1687 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1688 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1689 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1690 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1691 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1692 if (!mxf->current_partition->essence_offset) {
1693 compute_partition_essence_offset(s, mxf, &klv);
1694 }
1695
1696 if (!essence_offset)
1697 essence_offset = klv.offset;
1698
1699 /* seek to footer, previous partition or stop */
1700 if (mxf_parse_handle_essence(mxf) <= 0)
1701 break;
1702 continue;
1703 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1704 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1705 /* next partition pack - keep going, seek to previous partition or stop */
1706 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1707 break;
1708 }
1709
1710 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1711 if (IS_KLV_KEY(klv.key, metadata->key)) {
1712 int res;
1713 if (klv.key[5] == 0x53) {
1714 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1715 } else {
1716 uint64_t next = avio_tell(s->pb) + klv.length;
1717 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1718 avio_seek(s->pb, next, SEEK_SET);
1719 }
1720 if (res < 0) {
1721 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1722 return res;
1723 }
1724 break;
1725 }
1726 }
1727 if (!metadata->read)
1728 avio_skip(s->pb, klv.length);
1729 }
1730 /* FIXME avoid seek */
1731 if (!essence_offset) {
1732 av_log(s, AV_LOG_ERROR, "no essence\n");
1733 return AVERROR_INVALIDDATA;
1734 }
1735 avio_seek(s->pb, essence_offset, SEEK_SET);
1736
1737 mxf_compute_essence_containers(mxf);
1738
1739 /* we need to do this before computing the index tables
1740 * to be able to fill in zero IndexDurations with st->duration */
1741 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1742 return ret;
1743
1744 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1745 return ret;
1746
1747 if (mxf->nb_index_tables > 1) {
1748 /* TODO: look up which IndexSID to use via EssenceContainerData */
1749 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1750 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1751 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1752 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1753 return AVERROR_INVALIDDATA;
1754 }
1755
1756 return 0;
1757 }
1758
1759 /**
1760 * Computes DTS and PTS for the given video packet based on its offset.
1761 */
1762 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1763 {
1764 int64_t next_ofs;
1765 MXFIndexTable *t = &mxf->index_tables[0];
1766
1767 /* this is called from the OP1a demuxing logic, which means there
1768 * may be no index tables */
1769 if (mxf->nb_index_tables <= 0)
1770 return;
1771
1772 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1773 for (;;) {
1774 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1775 break;
1776
1777 if (next_ofs > pkt->pos)
1778 break;
1779
1780 mxf->current_edit_unit++;
1781 }
1782
1783 if (mxf->current_edit_unit >= t->nb_ptses)
1784 return;
1785
1786 pkt->dts = mxf->current_edit_unit + t->first_dts;
1787 pkt->pts = t->ptses[mxf->current_edit_unit];
1788 }
1789
1790 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1791 {
1792 KLVPacket klv;
1793
1794 while (!s->pb->eof_reached) {
1795 if (klv_read_packet(&klv, s->pb) < 0)
1796 return -1;
1797 PRINT_KEY(s, "read packet", klv.key);
1798 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1799 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1800 int res = mxf_decrypt_triplet(s, pkt, &klv);
1801 if (res < 0) {
1802 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1803 return -1;
1804 }
1805 return 0;
1806 }
1807 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1808 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1809 int index = mxf_get_stream_index(s, &klv);
1810 if (index < 0) {
1811 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1812 goto skip;
1813 }
1814 if (s->streams[index]->discard == AVDISCARD_ALL)
1815 goto skip;
1816 /* check for 8 channels AES3 element */
1817 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1818 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1819 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1820 return -1;
1821 }
1822 } else {
1823 int ret = av_get_packet(s->pb, pkt, klv.length);
1824 if (ret < 0)
1825 return ret;
1826 }
1827 pkt->stream_index = index;
1828 pkt->pos = klv.offset;
1829
1830 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1831 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1832
1833 return 0;
1834 } else
1835 skip:
1836 avio_skip(s->pb, klv.length);
1837 }
1838 return AVERROR_EOF;
1839 }
1840
1841 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1842 {
1843 MXFContext *mxf = s->priv_data;
1844 int ret, size;
1845 int64_t ret64, pos, next_pos;
1846 AVStream *st;
1847 MXFIndexTable *t;
1848
1849 if (mxf->op != OPAtom)
1850 return mxf_read_packet_old(s, pkt);
1851
1852 /* OPAtom - clip wrapped demuxing */
1853 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1854 st = s->streams[0];
1855 t = &mxf->index_tables[0];
1856
1857 if (mxf->current_edit_unit >= st->duration)
1858 return AVERROR_EOF;
1859
1860 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1861 return ret;
1862
1863 /* compute size by finding the next edit unit or the end of the essence container
1864 * not pretty, but it works */
1865 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_pos, 0)) < 0 &&
1866 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1867 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1868 return AVERROR_INVALIDDATA;
1869 }
1870
1871 if ((size = next_pos - pos) <= 0) {
1872 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1873 return AVERROR_INVALIDDATA;
1874 }
1875
1876 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1877 return ret64;
1878
1879 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1880 return ret < 0 ? ret : AVERROR_EOF;
1881
1882 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1883 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1884 pkt->dts = mxf->current_edit_unit + t->first_dts;
1885 pkt->pts = t->ptses[mxf->current_edit_unit];
1886 }
1887
1888 pkt->stream_index = 0;
1889 mxf->current_edit_unit++;
1890
1891 return 0;
1892 }
1893
1894
1895 static int mxf_read_close(AVFormatContext *s)
1896 {
1897 MXFContext *mxf = s->priv_data;
1898 MXFIndexTableSegment *seg;
1899 int i;
1900
1901 av_freep(&mxf->packages_refs);
1902
1903 for (i = 0; i < s->nb_streams; i++)
1904 s->streams[i]->priv_data = NULL;
1905
1906 for (i = 0; i < mxf->metadata_sets_count; i++) {
1907 switch (mxf->metadata_sets[i]->type) {
1908 case MultipleDescriptor:
1909 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
1910 break;
1911 case Sequence:
1912 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
1913 break;
1914 case SourcePackage:
1915 case MaterialPackage:
1916 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
1917 break;
1918 case IndexTableSegment:
1919 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
1920 av_freep(&seg->temporal_offset_entries);
1921 av_freep(&seg->flag_entries);
1922 av_freep(&seg->stream_offset_entries);
1923 break;
1924 default:
1925 break;
1926 }
1927 av_freep(&mxf->metadata_sets[i]);
1928 }
1929 av_freep(&mxf->partitions);
1930 av_freep(&mxf->metadata_sets);
1931 av_freep(&mxf->aesc);
1932 av_freep(&mxf->local_tags);
1933
1934 for (i = 0; i < mxf->nb_index_tables; i++) {
1935 av_freep(&mxf->index_tables[i].segments);
1936 av_freep(&mxf->index_tables[i].ptses);
1937 av_freep(&mxf->index_tables[i].fake_index);
1938 }
1939 av_freep(&mxf->index_tables);
1940
1941 return 0;
1942 }
1943
1944 static int mxf_probe(AVProbeData *p) {
1945 uint8_t *bufp = p->buf;
1946 uint8_t *end = p->buf + p->buf_size;
1947
1948 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1949 return 0;
1950
1951 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1952 end -= sizeof(mxf_header_partition_pack_key);
1953 for (; bufp < end; bufp++) {
1954 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1955 return AVPROBE_SCORE_MAX;
1956 }
1957 return 0;
1958 }
1959
1960 /* rudimentary byte seek */
1961 /* XXX: use MXF Index */
1962 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1963 {
1964 AVStream *st = s->streams[stream_index];
1965 int64_t seconds;
1966 MXFContext* mxf = s->priv_data;
1967 int64_t seekpos;
1968 int ret;
1969 MXFIndexTable *t;
1970
1971 if (mxf->index_tables <= 0) {
1972 if (!s->bit_rate)
1973 return AVERROR_INVALIDDATA;
1974 if (sample_time < 0)
1975 sample_time = 0;
1976 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1977
1978 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
1979 return ret;
1980 ff_update_cur_dts(s, st, sample_time);
1981 } else {
1982 t = &mxf->index_tables[0];
1983
1984 /* clamp above zero, else ff_index_search_timestamp() returns negative
1985 * this also means we allow seeking before the start */
1986 sample_time = FFMAX(sample_time, 0);
1987
1988 if (t->fake_index) {
1989 /* behave as if we have a proper index */
1990 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
1991 return sample_time;
1992 } else {
1993 /* no IndexEntryArray (one or more CBR segments)
1994 * make sure we don't seek past the end */
1995 sample_time = FFMIN(sample_time, st->duration - 1);
1996 }
1997
1998 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
1999 return ret;
2000
2001 ff_update_cur_dts(s, st, sample_time);
2002 mxf->current_edit_unit = sample_time;
2003 avio_seek(s->pb, seekpos, SEEK_SET);
2004 }
2005 return 0;
2006 }
2007
2008 AVInputFormat ff_mxf_demuxer = {
2009 .name = "mxf",
2010 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2011 .priv_data_size = sizeof(MXFContext),
2012 .read_probe = mxf_probe,
2013 .read_header = mxf_read_header,
2014 .read_packet = mxf_read_packet,
2015 .read_close = mxf_read_close,
2016 .read_seek = mxf_read_seek,
2017 };