mxfdec: Handle small EditUnitByteCount
[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 = 1,
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 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
211 } MXFContext;
212
213 enum MXFWrappingScheme {
214 Frame,
215 Clip,
216 };
217
218 /* NOTE: klv_offset is not set (-1) for local keys */
219 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
220
221 typedef struct {
222 const UID key;
223 MXFMetadataReadFunc *read;
224 int ctx_size;
225 enum MXFMetadataSetType type;
226 } MXFMetadataReadTableEntry;
227
228 /* partial keys to match */
229 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
230 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
231 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
232 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
233 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
234 /* complete keys to match */
235 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 };
236 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
237 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
238 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
239
240 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
241
242 static int64_t klv_decode_ber_length(AVIOContext *pb)
243 {
244 uint64_t size = avio_r8(pb);
245 if (size & 0x80) { /* long form */
246 int bytes_num = size & 0x7f;
247 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
248 if (bytes_num > 8)
249 return AVERROR_INVALIDDATA;
250 size = 0;
251 while (bytes_num--)
252 size = size << 8 | avio_r8(pb);
253 }
254 return size;
255 }
256
257 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
258 {
259 int i, b;
260 for (i = 0; i < size && !pb->eof_reached; i++) {
261 b = avio_r8(pb);
262 if (b == key[0])
263 i = 0;
264 else if (b != key[i])
265 i = -1;
266 }
267 return i == size;
268 }
269
270 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
271 {
272 if (!mxf_read_sync(pb, mxf_klv_key, 4))
273 return AVERROR_INVALIDDATA;
274 klv->offset = avio_tell(pb) - 4;
275 memcpy(klv->key, mxf_klv_key, 4);
276 avio_read(pb, klv->key + 4, 12);
277 klv->length = klv_decode_ber_length(pb);
278 return klv->length == -1 ? -1 : 0;
279 }
280
281 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
282 {
283 int i;
284
285 for (i = 0; i < s->nb_streams; i++) {
286 MXFTrack *track = s->streams[i]->priv_data;
287 /* SMPTE 379M 7.3 */
288 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
289 return i;
290 }
291 /* return 0 if only one stream, for OP Atom files with 0 as track number */
292 return s->nb_streams == 1 ? 0 : -1;
293 }
294
295 /* XXX: use AVBitStreamFilter */
296 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
297 {
298 const uint8_t *buf_ptr, *end_ptr;
299 uint8_t *data_ptr;
300 int i;
301
302 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
303 return AVERROR_INVALIDDATA;
304 length = av_get_packet(pb, pkt, length);
305 if (length < 0)
306 return length;
307 data_ptr = pkt->data;
308 end_ptr = pkt->data + length;
309 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
310 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
311 for (i = 0; i < st->codec->channels; i++) {
312 uint32_t sample = bytestream_get_le32(&buf_ptr);
313 if (st->codec->bits_per_coded_sample == 24)
314 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
315 else
316 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
317 }
318 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
319 }
320 av_shrink_packet(pkt, data_ptr - pkt->data);
321 return 0;
322 }
323
324 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
325 {
326 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
327 MXFContext *mxf = s->priv_data;
328 AVIOContext *pb = s->pb;
329 int64_t end = avio_tell(pb) + klv->length;
330 int64_t size;
331 uint64_t orig_size;
332 uint64_t plaintext_size;
333 uint8_t ivec[16];
334 uint8_t tmpbuf[16];
335 int index;
336
337 if (!mxf->aesc && s->key && s->keylen == 16) {
338 mxf->aesc = av_malloc(av_aes_size);
339 if (!mxf->aesc)
340 return AVERROR(ENOMEM);
341 av_aes_init(mxf->aesc, s->key, 128, 1);
342 }
343 // crypto context
344 avio_skip(pb, klv_decode_ber_length(pb));
345 // plaintext offset
346 klv_decode_ber_length(pb);
347 plaintext_size = avio_rb64(pb);
348 // source klv key
349 klv_decode_ber_length(pb);
350 avio_read(pb, klv->key, 16);
351 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
352 return AVERROR_INVALIDDATA;
353 index = mxf_get_stream_index(s, klv);
354 if (index < 0)
355 return AVERROR_INVALIDDATA;
356 // source size
357 klv_decode_ber_length(pb);
358 orig_size = avio_rb64(pb);
359 if (orig_size < plaintext_size)
360 return AVERROR_INVALIDDATA;
361 // enc. code
362 size = klv_decode_ber_length(pb);
363 if (size < 32 || size - 32 < orig_size)
364 return AVERROR_INVALIDDATA;
365 avio_read(pb, ivec, 16);
366 avio_read(pb, tmpbuf, 16);
367 if (mxf->aesc)
368 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
369 if (memcmp(tmpbuf, checkv, 16))
370 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
371 size -= 32;
372 size = av_get_packet(pb, pkt, size);
373 if (size < 0)
374 return size;
375 else if (size < plaintext_size)
376 return AVERROR_INVALIDDATA;
377 size -= plaintext_size;
378 if (mxf->aesc)
379 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
380 &pkt->data[plaintext_size], size >> 4, ivec, 1);
381 av_shrink_packet(pkt, orig_size);
382 pkt->stream_index = index;
383 avio_skip(pb, end - avio_tell(pb));
384 return 0;
385 }
386
387 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
388 {
389 MXFContext *mxf = arg;
390 int item_num = avio_rb32(pb);
391 int item_len = avio_rb32(pb);
392
393 if (item_len != 18) {
394 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
395 item_len);
396 return AVERROR_PATCHWELCOME;
397 }
398 if (item_num > UINT_MAX / item_len)
399 return AVERROR_INVALIDDATA;
400 mxf->local_tags_count = item_num;
401 mxf->local_tags = av_malloc(item_num*item_len);
402 if (!mxf->local_tags)
403 return AVERROR(ENOMEM);
404 avio_read(pb, mxf->local_tags, item_num*item_len);
405 return 0;
406 }
407
408 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
409 {
410 MXFContext *mxf = arg;
411 MXFPartition *partition, *tmp_part;
412 UID op;
413 uint64_t footer_partition;
414 uint32_t nb_essence_containers;
415
416 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
417 return AVERROR(ENOMEM);
418
419 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
420 if (!tmp_part)
421 return AVERROR(ENOMEM);
422 mxf->partitions = tmp_part;
423
424 if (mxf->parsing_backward) {
425 /* insert the new partition pack in the middle
426 * this makes the entries in mxf->partitions sorted by offset */
427 memmove(&mxf->partitions[mxf->last_forward_partition+1],
428 &mxf->partitions[mxf->last_forward_partition],
429 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
430 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
431 } else {
432 mxf->last_forward_partition++;
433 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
434 }
435
436 memset(partition, 0, sizeof(*partition));
437 mxf->partitions_count++;
438 partition->pack_length = avio_tell(pb) - klv_offset + size;
439
440 switch(uid[13]) {
441 case 2:
442 partition->type = Header;
443 break;
444 case 3:
445 partition->type = BodyPartition;
446 break;
447 case 4:
448 partition->type = Footer;
449 break;
450 default:
451 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
452 return AVERROR_INVALIDDATA;
453 }
454
455 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
456 partition->closed = partition->type == Footer || !(uid[14] & 1);
457 partition->complete = uid[14] > 2;
458 avio_skip(pb, 4);
459 partition->kag_size = avio_rb32(pb);
460 partition->this_partition = avio_rb64(pb);
461 partition->previous_partition = avio_rb64(pb);
462 footer_partition = avio_rb64(pb);
463 partition->header_byte_count = avio_rb64(pb);
464 partition->index_byte_count = avio_rb64(pb);
465 partition->index_sid = avio_rb32(pb);
466 avio_skip(pb, 8);
467 partition->body_sid = avio_rb32(pb);
468 avio_read(pb, op, sizeof(UID));
469 nb_essence_containers = avio_rb32(pb);
470
471 /* some files don'thave FooterPartition set in every partition */
472 if (footer_partition) {
473 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
474 av_log(mxf->fc, AV_LOG_ERROR,
475 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
476 mxf->footer_partition, footer_partition);
477 } else {
478 mxf->footer_partition = footer_partition;
479 }
480 }
481
482 av_dlog(mxf->fc,
483 "PartitionPack: ThisPartition = 0x%"PRIX64
484 ", PreviousPartition = 0x%"PRIX64", "
485 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
486 partition->this_partition,
487 partition->previous_partition, footer_partition,
488 partition->index_sid, partition->body_sid);
489
490 /* sanity check PreviousPartition if set */
491 if (partition->previous_partition &&
492 mxf->run_in + partition->previous_partition >= klv_offset) {
493 av_log(mxf->fc, AV_LOG_ERROR,
494 "PreviousPartition points to this partition or forward\n");
495 return AVERROR_INVALIDDATA;
496 }
497
498 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
499 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
500 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
501 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
502 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
503 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
504 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
505 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
506 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
507 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
508 else if (op[12] == 0x10) {
509 /* SMPTE 390m: "There shall be exactly one essence container"
510 * 2011_DCPTEST_24FPS.V.mxf violates this and is frame wrapped,
511 * which is why we assume OP1a. */
512 if (nb_essence_containers != 1) {
513 /* only nag once */
514 if (!mxf->op)
515 av_log(mxf->fc, AV_LOG_WARNING,
516 "\"OPAtom\" with %u ECs - assuming OP1a\n",
517 nb_essence_containers);
518
519 mxf->op = OP1a;
520 } else
521 mxf->op = OPAtom;
522 } else {
523 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
524 mxf->op = OP1a;
525 }
526
527 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
528 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
529
530 if (mxf->op == OPSonyOpt)
531 partition->kag_size = 512;
532 else
533 partition->kag_size = 1;
534
535 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
536 }
537
538 return 0;
539 }
540
541 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
542 {
543 MXFMetadataSet **tmp;
544 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
545 return AVERROR(ENOMEM);
546 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
547 if (!tmp)
548 return AVERROR(ENOMEM);
549 mxf->metadata_sets = tmp;
550 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
551 mxf->metadata_sets_count++;
552 return 0;
553 }
554
555 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
556 {
557 MXFCryptoContext *cryptocontext = arg;
558 if (size != 16)
559 return AVERROR_INVALIDDATA;
560 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
561 avio_read(pb, cryptocontext->source_container_ul, 16);
562 return 0;
563 }
564
565 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
566 {
567 MXFContext *mxf = arg;
568 switch (tag) {
569 case 0x1901:
570 mxf->packages_count = avio_rb32(pb);
571 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
572 return AVERROR_INVALIDDATA;
573 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
574 if (!mxf->packages_refs)
575 return AVERROR(ENOMEM);
576 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
577 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
578 break;
579 }
580 return 0;
581 }
582
583 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
584 {
585 MXFStructuralComponent *source_clip = arg;
586 switch(tag) {
587 case 0x0202:
588 source_clip->duration = avio_rb64(pb);
589 break;
590 case 0x1201:
591 source_clip->start_position = avio_rb64(pb);
592 break;
593 case 0x1101:
594 /* UMID, only get last 16 bytes */
595 avio_skip(pb, 16);
596 avio_read(pb, source_clip->source_package_uid, 16);
597 break;
598 case 0x1102:
599 source_clip->source_track_id = avio_rb32(pb);
600 break;
601 }
602 return 0;
603 }
604
605 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
606 {
607 MXFPackage *package = arg;
608 switch(tag) {
609 case 0x4403:
610 package->tracks_count = avio_rb32(pb);
611 if (package->tracks_count >= UINT_MAX / sizeof(UID))
612 return AVERROR_INVALIDDATA;
613 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
614 if (!package->tracks_refs)
615 return AVERROR(ENOMEM);
616 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
617 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
618 break;
619 }
620 return 0;
621 }
622
623 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
624 {
625 MXFTrack *track = arg;
626 switch(tag) {
627 case 0x4801:
628 track->track_id = avio_rb32(pb);
629 break;
630 case 0x4804:
631 avio_read(pb, track->track_number, 4);
632 break;
633 case 0x4B01:
634 track->edit_rate.den = avio_rb32(pb);
635 track->edit_rate.num = avio_rb32(pb);
636 break;
637 case 0x4803:
638 avio_read(pb, track->sequence_ref, 16);
639 break;
640 }
641 return 0;
642 }
643
644 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
645 {
646 MXFSequence *sequence = arg;
647 switch(tag) {
648 case 0x0202:
649 sequence->duration = avio_rb64(pb);
650 break;
651 case 0x0201:
652 avio_read(pb, sequence->data_definition_ul, 16);
653 break;
654 case 0x1001:
655 sequence->structural_components_count = avio_rb32(pb);
656 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
657 return AVERROR_INVALIDDATA;
658 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
659 if (!sequence->structural_components_refs)
660 return AVERROR(ENOMEM);
661 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
662 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
663 break;
664 }
665 return 0;
666 }
667
668 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
669 {
670 MXFPackage *package = arg;
671 switch(tag) {
672 case 0x4403:
673 package->tracks_count = avio_rb32(pb);
674 if (package->tracks_count >= UINT_MAX / sizeof(UID))
675 return AVERROR_INVALIDDATA;
676 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
677 if (!package->tracks_refs)
678 return AVERROR(ENOMEM);
679 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
680 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
681 break;
682 case 0x4401:
683 /* UMID, only get last 16 bytes */
684 avio_skip(pb, 16);
685 avio_read(pb, package->package_uid, 16);
686 break;
687 case 0x4701:
688 avio_read(pb, package->descriptor_ref, 16);
689 break;
690 }
691 return 0;
692 }
693
694 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
695 {
696 int i, length;
697
698 segment->nb_index_entries = avio_rb32(pb);
699 if (!segment->nb_index_entries)
700 return 0;
701 else if (segment->nb_index_entries < 0 ||
702 segment->nb_index_entries >
703 (INT_MAX >> av_log2(sizeof(*segment->stream_offset_entries))))
704 return AVERROR(ENOMEM);
705
706 length = avio_rb32(pb);
707
708 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
709 sizeof(*segment->temporal_offset_entries));
710 segment->flag_entries = av_mallocz(segment->nb_index_entries *
711 sizeof(*segment->flag_entries));
712 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
713 sizeof(*segment->stream_offset_entries));
714
715 if (!segment->flag_entries || !segment->stream_offset_entries ||
716 !segment->temporal_offset_entries) {
717 av_freep(&segment->flag_entries);
718 av_freep(&segment->stream_offset_entries);
719 av_freep(&segment->temporal_offset_entries);
720 return AVERROR(ENOMEM);
721 }
722
723 for (i = 0; i < segment->nb_index_entries; i++) {
724 segment->temporal_offset_entries[i] = avio_r8(pb);
725 avio_r8(pb); /* KeyFrameOffset */
726 segment->flag_entries[i] = avio_r8(pb);
727 segment->stream_offset_entries[i] = avio_rb64(pb);
728 avio_skip(pb, length - 11);
729 }
730 return 0;
731 }
732
733 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
734 {
735 MXFIndexTableSegment *segment = arg;
736 switch(tag) {
737 case 0x3F05:
738 segment->edit_unit_byte_count = avio_rb32(pb);
739 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
740 break;
741 case 0x3F06:
742 segment->index_sid = avio_rb32(pb);
743 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
744 break;
745 case 0x3F07:
746 segment->body_sid = avio_rb32(pb);
747 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
748 break;
749 case 0x3F0A:
750 av_dlog(NULL, "IndexEntryArray found\n");
751 return mxf_read_index_entry_array(pb, segment);
752 case 0x3F0B:
753 segment->index_edit_rate.num = avio_rb32(pb);
754 segment->index_edit_rate.den = avio_rb32(pb);
755 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
756 segment->index_edit_rate.den);
757 break;
758 case 0x3F0C:
759 segment->index_start_position = avio_rb64(pb);
760 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
761 break;
762 case 0x3F0D:
763 segment->index_duration = avio_rb64(pb);
764 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
765 break;
766 }
767 return 0;
768 }
769
770 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
771 {
772 int code, value, ofs = 0;
773 char layout[16] = {0};
774
775 do {
776 code = avio_r8(pb);
777 value = avio_r8(pb);
778 av_dlog(NULL, "pixel layout: code %#x\n", code);
779
780 if (ofs < 16) {
781 layout[ofs++] = code;
782 layout[ofs++] = value;
783 }
784 } while (code != 0); /* SMPTE 377M E.2.46 */
785
786 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
787 }
788
789 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
790 {
791 MXFDescriptor *descriptor = arg;
792 switch(tag) {
793 case 0x3F01:
794 descriptor->sub_descriptors_count = avio_rb32(pb);
795 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
796 return AVERROR_INVALIDDATA;
797 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
798 if (!descriptor->sub_descriptors_refs)
799 return AVERROR(ENOMEM);
800 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
801 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
802 break;
803 case 0x3004:
804 avio_read(pb, descriptor->essence_container_ul, 16);
805 break;
806 case 0x3006:
807 descriptor->linked_track_id = avio_rb32(pb);
808 break;
809 case 0x3201: /* PictureEssenceCoding */
810 avio_read(pb, descriptor->essence_codec_ul, 16);
811 break;
812 case 0x3203:
813 descriptor->width = avio_rb32(pb);
814 break;
815 case 0x3202:
816 descriptor->height = avio_rb32(pb);
817 break;
818 case 0x320E:
819 descriptor->aspect_ratio.num = avio_rb32(pb);
820 descriptor->aspect_ratio.den = avio_rb32(pb);
821 break;
822 case 0x3D03:
823 descriptor->sample_rate.num = avio_rb32(pb);
824 descriptor->sample_rate.den = avio_rb32(pb);
825 break;
826 case 0x3D06: /* SoundEssenceCompression */
827 avio_read(pb, descriptor->essence_codec_ul, 16);
828 break;
829 case 0x3D07:
830 descriptor->channels = avio_rb32(pb);
831 break;
832 case 0x3D01:
833 descriptor->bits_per_sample = avio_rb32(pb);
834 break;
835 case 0x3401:
836 mxf_read_pixel_layout(pb, descriptor);
837 break;
838 default:
839 /* Private uid used by SONY C0023S01.mxf */
840 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
841 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
842 if (!descriptor->extradata)
843 return AVERROR(ENOMEM);
844 descriptor->extradata_size = size;
845 avio_read(pb, descriptor->extradata, size);
846 }
847 break;
848 }
849 return 0;
850 }
851
852 /*
853 * Match an uid independently of the version byte and up to len common bytes
854 * Returns: boolean
855 */
856 static int mxf_match_uid(const UID key, const UID uid, int len)
857 {
858 int i;
859 for (i = 0; i < len; i++) {
860 if (i != 7 && key[i] != uid[i])
861 return 0;
862 }
863 return 1;
864 }
865
866 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
867 {
868 while (uls->uid[0]) {
869 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
870 break;
871 uls++;
872 }
873 return uls;
874 }
875
876 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
877 {
878 int i;
879
880 if (!strong_ref)
881 return NULL;
882 for (i = 0; i < mxf->metadata_sets_count; i++) {
883 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
884 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
885 return mxf->metadata_sets[i];
886 }
887 }
888 return NULL;
889 }
890
891 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
892 // video essence container uls
893 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
894 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
895 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
896 };
897 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
898 // sound essence container uls
899 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
900 { { 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 */
901 { { 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 */
902 { { 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 */
903 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, CODEC_ID_NONE },
904 };
905
906 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
907 {
908 int i, j, nb_segments = 0;
909 MXFIndexTableSegment **unsorted_segments;
910 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
911
912 /* count number of segments, allocate arrays and copy unsorted segments */
913 for (i = 0; i < mxf->metadata_sets_count; i++)
914 if (mxf->metadata_sets[i]->type == IndexTableSegment)
915 nb_segments++;
916
917 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
918 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
919 if (!sorted_segments || !unsorted_segments) {
920 av_freep(sorted_segments);
921 av_free(unsorted_segments);
922 return AVERROR(ENOMEM);
923 }
924
925 for (i = j = 0; i < mxf->metadata_sets_count; i++)
926 if (mxf->metadata_sets[i]->type == IndexTableSegment)
927 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
928
929 *nb_sorted_segments = 0;
930
931 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
932 for (i = 0; i < nb_segments; i++) {
933 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
934
935 for (j = 0; j < nb_segments; j++) {
936 MXFIndexTableSegment *s = unsorted_segments[j];
937
938 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
939 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
940 */
941 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
942 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
943 best = j;
944 best_body_sid = s->body_sid;
945 best_index_sid = s->index_sid;
946 best_index_start = s->index_start_position;
947 }
948 }
949
950 /* no suitable entry found -> we're done */
951 if (best == -1)
952 break;
953
954 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
955 last_body_sid = best_body_sid;
956 last_index_sid = best_index_sid;
957 last_index_start = best_index_start;
958 }
959
960 av_free(unsorted_segments);
961
962 return 0;
963 }
964
965 /**
966 * Computes the absolute file offset of the given essence container offset
967 */
968 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
969 {
970 int x;
971 int64_t offset_in = offset; /* for logging */
972
973 for (x = 0; x < mxf->partitions_count; x++) {
974 MXFPartition *p = &mxf->partitions[x];
975
976 if (p->body_sid != body_sid)
977 continue;
978
979 if (offset < p->essence_length || !p->essence_length) {
980 *offset_out = p->essence_offset + offset;
981 return 0;
982 }
983
984 offset -= p->essence_length;
985 }
986
987 av_log(mxf->fc, AV_LOG_ERROR,
988 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
989 offset_in, body_sid);
990
991 return AVERROR_INVALIDDATA;
992 }
993
994 /**
995 * Returns the end position of the essence container with given BodySID, or zero if unknown
996 */
997 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
998 {
999 int x;
1000 int64_t ret = 0;
1001
1002 for (x = 0; x < mxf->partitions_count; x++) {
1003 MXFPartition *p = &mxf->partitions[x];
1004
1005 if (p->body_sid != body_sid)
1006 continue;
1007
1008 if (!p->essence_length)
1009 return 0;
1010
1011 ret = p->essence_offset + p->essence_length;
1012 }
1013
1014 return ret;
1015 }
1016
1017 /* EditUnit -> absolute offset */
1018 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)
1019 {
1020 int i;
1021 int64_t offset_temp = 0;
1022
1023 for (i = 0; i < index_table->nb_segments; i++) {
1024 MXFIndexTableSegment *s = index_table->segments[i];
1025
1026 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1027
1028 if (edit_unit < s->index_start_position + s->index_duration) {
1029 int64_t index = edit_unit - s->index_start_position;
1030
1031 if (s->edit_unit_byte_count)
1032 offset_temp += s->edit_unit_byte_count * index;
1033 else if (s->nb_index_entries) {
1034 if (s->nb_index_entries == 2 * s->index_duration + 1)
1035 index *= 2; /* Avid index */
1036
1037 if (index < 0 || index > s->nb_index_entries) {
1038 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1039 index_table->index_sid, s->index_start_position);
1040 return AVERROR_INVALIDDATA;
1041 }
1042
1043 offset_temp = s->stream_offset_entries[index];
1044 } else {
1045 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1046 index_table->index_sid, s->index_start_position);
1047 return AVERROR_INVALIDDATA;
1048 }
1049
1050 if (edit_unit_out)
1051 *edit_unit_out = edit_unit;
1052
1053 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1054 } else {
1055 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1056 offset_temp += s->edit_unit_byte_count * s->index_duration;
1057 }
1058 }
1059
1060 if (nag)
1061 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);
1062
1063 return AVERROR_INVALIDDATA;
1064 }
1065
1066 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1067 {
1068 int i, j, x;
1069 int8_t max_temporal_offset = -128;
1070
1071 /* first compute how many entries we have */
1072 for (i = 0; i < index_table->nb_segments; i++) {
1073 MXFIndexTableSegment *s = index_table->segments[i];
1074
1075 if (!s->nb_index_entries) {
1076 index_table->nb_ptses = 0;
1077 return 0; /* no TemporalOffsets */
1078 }
1079
1080 index_table->nb_ptses += s->index_duration;
1081 }
1082
1083 /* paranoid check */
1084 if (index_table->nb_ptses <= 0)
1085 return 0;
1086
1087 if (index_table->nb_ptses > INT_MAX >> av_log2(sizeof(AVIndexEntry)) + 1)
1088 return AVERROR(ENOMEM);
1089
1090 index_table->ptses = av_mallocz(index_table->nb_ptses *
1091 sizeof(int64_t));
1092 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1093 sizeof(AVIndexEntry));
1094 if (!index_table->ptses || !index_table->fake_index) {
1095 av_freep(&index_table->ptses);
1096 return AVERROR(ENOMEM);
1097 }
1098
1099 /* we may have a few bad TemporalOffsets
1100 * make sure the corresponding PTSes don't have the bogus value 0 */
1101 for (x = 0; x < index_table->nb_ptses; x++)
1102 index_table->ptses[x] = AV_NOPTS_VALUE;
1103
1104 /**
1105 * We have this:
1106 *
1107 * x TemporalOffset
1108 * 0: 0
1109 * 1: 1
1110 * 2: 1
1111 * 3: -2
1112 * 4: 1
1113 * 5: 1
1114 * 6: -2
1115 *
1116 * We want to transform it into this:
1117 *
1118 * x DTS PTS
1119 * 0: -1 0
1120 * 1: 0 3
1121 * 2: 1 1
1122 * 3: 2 2
1123 * 4: 3 6
1124 * 5: 4 4
1125 * 6: 5 5
1126 *
1127 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1128 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1129 * The latter makes DTS <= PTS.
1130 */
1131 for (i = x = 0; i < index_table->nb_segments; i++) {
1132 MXFIndexTableSegment *s = index_table->segments[i];
1133 int index_delta = 1;
1134
1135 if (s->nb_index_entries == 2 * s->index_duration + 1)
1136 index_delta = 2; /* Avid index */
1137
1138 for (j = 0; j < s->nb_index_entries; j += index_delta, x++) {
1139 int offset = s->temporal_offset_entries[j] / index_delta;
1140 int index = x + offset;
1141
1142 if (x >= index_table->nb_ptses) {
1143 av_log(mxf->fc, AV_LOG_ERROR,
1144 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1145 s->nb_index_entries, s->index_duration);
1146 break;
1147 }
1148
1149 index_table->fake_index[x].timestamp = x;
1150 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1151
1152 if (index < 0 || index >= index_table->nb_ptses) {
1153 av_log(mxf->fc, AV_LOG_ERROR,
1154 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1155 x, offset, index);
1156 continue;
1157 }
1158
1159 index_table->ptses[index] = x;
1160 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1161 }
1162 }
1163
1164 index_table->first_dts = -max_temporal_offset;
1165
1166 return 0;
1167 }
1168
1169 /**
1170 * Sorts and collects index table segments into index tables.
1171 * Also computes PTSes if possible.
1172 */
1173 static int mxf_compute_index_tables(MXFContext *mxf)
1174 {
1175 int i, j, k, ret, nb_sorted_segments;
1176 MXFIndexTableSegment **sorted_segments = NULL;
1177
1178 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1179 nb_sorted_segments <= 0) {
1180 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1181 return 0;
1182 }
1183
1184 /* sanity check and count unique BodySIDs/IndexSIDs */
1185 for (i = 0; i < nb_sorted_segments; i++) {
1186 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1187 mxf->nb_index_tables++;
1188 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1189 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1190 ret = AVERROR_INVALIDDATA;
1191 goto finish_decoding_index;
1192 }
1193 }
1194
1195 if (mxf->nb_index_tables > INT_MAX >> av_log2(sizeof(MXFIndexTable)) + 1 ||
1196 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1197 sizeof(MXFIndexTable)))) {
1198 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1199 ret = AVERROR(ENOMEM);
1200 goto finish_decoding_index;
1201 }
1202
1203 /* distribute sorted segments to index tables */
1204 for (i = j = 0; i < nb_sorted_segments; i++) {
1205 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1206 /* next IndexSID */
1207 j++;
1208 }
1209
1210 mxf->index_tables[j].nb_segments++;
1211 }
1212
1213 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1214 MXFIndexTable *t = &mxf->index_tables[j];
1215
1216 if (t->nb_segments >
1217 (INT_MAX >> av_log2(sizeof(MXFIndexTableSegment *))) ||
1218 !(t->segments = av_mallocz(t->nb_segments *
1219 sizeof(MXFIndexTableSegment*)))) {
1220 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1221 " pointer array\n");
1222 ret = AVERROR(ENOMEM);
1223 goto finish_decoding_index;
1224 }
1225
1226 if (sorted_segments[i]->index_start_position)
1227 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1228 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1229
1230 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1231 t->index_sid = sorted_segments[i]->index_sid;
1232 t->body_sid = sorted_segments[i]->body_sid;
1233
1234 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1235 goto finish_decoding_index;
1236
1237 /* fix zero IndexDurations */
1238 for (k = 0; k < t->nb_segments; k++) {
1239 if (t->segments[k]->index_duration)
1240 continue;
1241
1242 if (t->nb_segments > 1)
1243 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1244 t->index_sid, k);
1245
1246 if (mxf->fc->nb_streams <= 0) {
1247 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1248 break;
1249 }
1250
1251 /* assume the first stream's duration is reasonable
1252 * leave index_duration = 0 on further segments in case we have any (unlikely)
1253 */
1254 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1255 break;
1256 }
1257 }
1258
1259 ret = 0;
1260 finish_decoding_index:
1261 av_free(sorted_segments);
1262 return ret;
1263 }
1264
1265 static int mxf_parse_structural_metadata(MXFContext *mxf)
1266 {
1267 MXFPackage *material_package = NULL;
1268 MXFPackage *temp_package = NULL;
1269 int i, j, k, ret;
1270
1271 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1272 /* TODO: handle multiple material packages (OP3x) */
1273 for (i = 0; i < mxf->packages_count; i++) {
1274 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1275 if (material_package) break;
1276 }
1277 if (!material_package) {
1278 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1279 return AVERROR_INVALIDDATA;
1280 }
1281
1282 for (i = 0; i < material_package->tracks_count; i++) {
1283 MXFPackage *source_package = NULL;
1284 MXFTrack *material_track = NULL;
1285 MXFTrack *source_track = NULL;
1286 MXFTrack *temp_track = NULL;
1287 MXFDescriptor *descriptor = NULL;
1288 MXFStructuralComponent *component = NULL;
1289 UID *essence_container_ul = NULL;
1290 const MXFCodecUL *codec_ul = NULL;
1291 const MXFCodecUL *container_ul = NULL;
1292 AVStream *st;
1293
1294 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1295 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1296 continue;
1297 }
1298
1299 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1300 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1301 continue;
1302 }
1303
1304 /* TODO: handle multiple source clips */
1305 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1306 /* TODO: handle timecode component */
1307 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1308 if (!component)
1309 continue;
1310
1311 for (k = 0; k < mxf->packages_count; k++) {
1312 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1313 if (!temp_package)
1314 continue;
1315 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1316 source_package = temp_package;
1317 break;
1318 }
1319 }
1320 if (!source_package) {
1321 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1322 break;
1323 }
1324 for (k = 0; k < source_package->tracks_count; k++) {
1325 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1326 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1327 ret = AVERROR_INVALIDDATA;
1328 goto fail_and_free;
1329 }
1330 if (temp_track->track_id == component->source_track_id) {
1331 source_track = temp_track;
1332 break;
1333 }
1334 }
1335 if (!source_track) {
1336 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1337 break;
1338 }
1339 }
1340 if (!source_track || !component)
1341 continue;
1342
1343 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1344 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1345 ret = AVERROR_INVALIDDATA;
1346 goto fail_and_free;
1347 }
1348
1349 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1350 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1351 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1352 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1353 continue;
1354 }
1355
1356 st = avformat_new_stream(mxf->fc, NULL);
1357 if (!st) {
1358 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1359 ret = AVERROR(ENOMEM);
1360 goto fail_and_free;
1361 }
1362 st->id = source_track->track_id;
1363 st->priv_data = source_track;
1364 st->duration = component->duration;
1365 if (st->duration == -1)
1366 st->duration = AV_NOPTS_VALUE;
1367 st->start_time = component->start_position;
1368 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1369
1370 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1371 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1372 st->codec->codec_type = codec_ul->id;
1373
1374 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1375 if (source_package->descriptor) {
1376 if (source_package->descriptor->type == MultipleDescriptor) {
1377 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1378 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1379
1380 if (!sub_descriptor) {
1381 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1382 continue;
1383 }
1384 if (sub_descriptor->linked_track_id == source_track->track_id) {
1385 descriptor = sub_descriptor;
1386 break;
1387 }
1388 }
1389 } else if (source_package->descriptor->type == Descriptor)
1390 descriptor = source_package->descriptor;
1391 }
1392 if (!descriptor) {
1393 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1394 continue;
1395 }
1396 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1397 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1398 essence_container_ul = &descriptor->essence_container_ul;
1399 /* HACK: replacing the original key with mxf_encrypted_essence_container
1400 * is not allowed according to s429-6, try to find correct information anyway */
1401 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1402 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1403 for (k = 0; k < mxf->metadata_sets_count; k++) {
1404 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1405 if (metadata->type == CryptoContext) {
1406 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1407 break;
1408 }
1409 }
1410 }
1411
1412 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1413 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1414 st->codec->codec_id = codec_ul->id;
1415 if (descriptor->extradata) {
1416 st->codec->extradata = descriptor->extradata;
1417 st->codec->extradata_size = descriptor->extradata_size;
1418 }
1419 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1420 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1421 if (st->codec->codec_id == CODEC_ID_NONE)
1422 st->codec->codec_id = container_ul->id;
1423 st->codec->width = descriptor->width;
1424 st->codec->height = descriptor->height;
1425 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1426 st->codec->pix_fmt = descriptor->pix_fmt;
1427 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1428 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1429 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1430 if (st->codec->codec_id == CODEC_ID_NONE)
1431 st->codec->codec_id = container_ul->id;
1432 st->codec->channels = descriptor->channels;
1433 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1434 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1435 /* TODO: implement CODEC_ID_RAWAUDIO */
1436 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1437 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1438 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1439 else if (descriptor->bits_per_sample == 32)
1440 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1441 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1442 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1443 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1444 else if (descriptor->bits_per_sample == 32)
1445 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1446 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1447 st->need_parsing = AVSTREAM_PARSE_FULL;
1448 }
1449 }
1450 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1451 /* TODO: decode timestamps */
1452 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1453 }
1454 }
1455
1456 ret = 0;
1457 fail_and_free:
1458 return ret;
1459 }
1460
1461 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1462 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1463 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1464 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1465 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1466 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1467 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1468 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1469 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1470 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1471 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1472 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1473 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1474 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1475 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1476 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1477 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1478 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1479 { { 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 */
1480 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1481 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1482 { { 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 */
1483 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1484 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1485 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1486 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1487 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1488 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1489 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1490 };
1491
1492 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1493 {
1494 AVIOContext *pb = mxf->fc->pb;
1495 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1496 uint64_t klv_end = avio_tell(pb) + klv->length;
1497
1498 if (!ctx)
1499 return AVERROR(ENOMEM);
1500 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1501 int ret;
1502 int tag = avio_rb16(pb);
1503 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1504 uint64_t next = avio_tell(pb) + size;
1505 UID uid = {0};
1506
1507 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1508 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1509 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1510 continue;
1511 }
1512 if (tag > 0x7FFF) { /* dynamic tag */
1513 int i;
1514 for (i = 0; i < mxf->local_tags_count; i++) {
1515 int local_tag = AV_RB16(mxf->local_tags+i*18);
1516 if (local_tag == tag) {
1517 memcpy(uid, mxf->local_tags+i*18+2, 16);
1518 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1519 PRINT_KEY(mxf->fc, "uid", uid);
1520 }
1521 }
1522 }
1523 if (ctx_size && tag == 0x3C0A)
1524 avio_read(pb, ctx->uid, 16);
1525 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1526 return ret;
1527
1528 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1529 * it extending past the end of the KLV though (zzuf5.mxf). */
1530 if (avio_tell(pb) > klv_end) {
1531 av_log(mxf->fc, AV_LOG_ERROR,
1532 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1533 tag, klv->offset);
1534 return AVERROR_INVALIDDATA;
1535 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1536 avio_seek(pb, next, SEEK_SET);
1537 }
1538 if (ctx_size) ctx->type = type;
1539 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1540 }
1541
1542 /**
1543 * Seeks to the previous partition, if possible
1544 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1545 */
1546 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1547 {
1548 AVIOContext *pb = mxf->fc->pb;
1549
1550 if (!mxf->current_partition ||
1551 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1552 return 0; /* we've parsed all partitions */
1553
1554 /* seek to previous partition */
1555 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1556 mxf->current_partition = NULL;
1557
1558 av_dlog(mxf->fc, "seeking to previous partition\n");
1559
1560 return 1;
1561 }
1562
1563 /**
1564 * Called when essence is encountered
1565 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1566 */
1567 static int mxf_parse_handle_essence(MXFContext *mxf)
1568 {
1569 AVIOContext *pb = mxf->fc->pb;
1570 int64_t ret;
1571
1572 if (mxf->parsing_backward) {
1573 return mxf_seek_to_previous_partition(mxf);
1574 } else {
1575 if (!mxf->footer_partition) {
1576 av_dlog(mxf->fc, "no footer\n");
1577 return 0;
1578 }
1579
1580 av_dlog(mxf->fc, "seeking to footer\n");
1581
1582 /* remember where we were so we don't end up seeking further back than this */
1583 mxf->last_forward_tell = avio_tell(pb);
1584
1585 if (!pb->seekable) {
1586 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1587 return -1;
1588 }
1589
1590 /* seek to footer partition and parse backward */
1591 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1592 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1593 mxf->run_in + mxf->footer_partition, ret);
1594 return ret;
1595 }
1596
1597 mxf->current_partition = NULL;
1598 mxf->parsing_backward = 1;
1599 }
1600
1601 return 1;
1602 }
1603
1604 /**
1605 * Called when the next partition or EOF is encountered
1606 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1607 */
1608 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1609 {
1610 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1611 }
1612
1613 /**
1614 * Figure out the proper offset and length of the essence container
1615 * in each partition
1616 */
1617 static void mxf_compute_essence_containers(MXFContext *mxf)
1618 {
1619 int x;
1620
1621 /* everything is already correct */
1622 if (mxf->op == OPAtom)
1623 return;
1624
1625 for (x = 0; x < mxf->partitions_count; x++) {
1626 MXFPartition *p = &mxf->partitions[x];
1627
1628 if (!p->body_sid)
1629 continue; /* BodySID == 0 -> no essence */
1630
1631 if (x >= mxf->partitions_count - 1)
1632 break; /* last partition - can't compute length (and we don't need to) */
1633
1634 /* essence container spans to the next partition */
1635 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1636
1637 if (p->essence_length < 0) {
1638 /* next ThisPartition < essence_offset */
1639 p->essence_length = 0;
1640 av_log(mxf->fc, AV_LOG_ERROR,
1641 "partition %i: bad ThisPartition = %"PRIX64"\n",
1642 x+1, mxf->partitions[x+1].this_partition);
1643 }
1644 }
1645 }
1646
1647 static int64_t round_to_kag(int64_t position, int kag_size)
1648 {
1649 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1650 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1651 int64_t ret = (position / kag_size) * kag_size;
1652 return ret == position ? ret : ret + kag_size;
1653 }
1654
1655 static inline void compute_partition_essence_offset(AVFormatContext *s,
1656 MXFContext *mxf,
1657 KLVPacket *klv)
1658 {
1659 MXFPartition *cur_part = mxf->current_partition;
1660 /* for OP1a we compute essence_offset
1661 * for OPAtom we point essence_offset after the KL
1662 * (usually op1a_essence_offset + 20 or 25)
1663 * TODO: for OP1a we could eliminate this entire if statement, always
1664 * stopping parsing at op1a_essence_offset
1665 * for OPAtom we still need the actual essence_offset though
1666 * (the KL's length can vary)
1667 */
1668 int64_t op1a_essence_offset =
1669 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1670 cur_part->kag_size) +
1671 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1672 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1673
1674 if (mxf->op == OPAtom) {
1675 /* point essence_offset to the actual data
1676 * OPAtom has all the essence in one big KLV
1677 */
1678 cur_part->essence_offset = avio_tell(s->pb);
1679 cur_part->essence_length = klv->length;
1680 } else {
1681 /* NOTE: op1a_essence_offset may be less than to klv.offset
1682 * (C0023S01.mxf) */
1683 cur_part->essence_offset = op1a_essence_offset;
1684 }
1685 }
1686
1687 static int is_pcm(enum CodecID codec_id)
1688 {
1689 /* we only care about "normal" PCM codecs until we get samples */
1690 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1691 }
1692
1693 /**
1694 * Deal with the case where for some audio atoms EditUnitByteCount is
1695 * very small (2, 4..). In those cases we should read more than one
1696 * sample per call to mxf_read_packet().
1697 */
1698 static void mxf_handle_small_eubc(AVFormatContext *s)
1699 {
1700 MXFContext *mxf = s->priv_data;
1701
1702 /* assuming non-OPAtom == frame wrapped
1703 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1704 if (mxf->op != OPAtom)
1705 return;
1706
1707 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1708 if (s->nb_streams != 1 ||
1709 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1710 !is_pcm(s->streams[0]->codec->codec_id) ||
1711 mxf->nb_index_tables != 1 ||
1712 mxf->index_tables[0].nb_segments != 1 ||
1713 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1714 return;
1715
1716 /* arbitrarily default to 48 kHz PAL audio frame size */
1717 /* TODO: We could compute this from the ratio between the audio
1718 * and video edit rates for 48 kHz NTSC we could use the
1719 * 1802-1802-1802-1802-1801 pattern. */
1720 mxf->edit_units_per_packet = 1920;
1721 }
1722
1723 static int mxf_read_header(AVFormatContext *s)
1724 {
1725 MXFContext *mxf = s->priv_data;
1726 KLVPacket klv;
1727 int64_t essence_offset = 0;
1728 int ret;
1729
1730 mxf->last_forward_tell = INT64_MAX;
1731 mxf->edit_units_per_packet = 1;
1732
1733 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1734 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1735 return AVERROR_INVALIDDATA;
1736 }
1737 avio_seek(s->pb, -14, SEEK_CUR);
1738 mxf->fc = s;
1739 mxf->run_in = avio_tell(s->pb);
1740
1741 while (!s->pb->eof_reached) {
1742 const MXFMetadataReadTableEntry *metadata;
1743
1744 if (klv_read_packet(&klv, s->pb) < 0) {
1745 /* EOF - seek to previous partition or stop */
1746 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1747 break;
1748 else
1749 continue;
1750 }
1751
1752 PRINT_KEY(s, "read header", klv.key);
1753 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1754 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1755 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1756 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1757 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1758
1759 if (!mxf->current_partition) {
1760 av_log(mxf->fc, AV_LOG_ERROR,
1761 "found essence prior to first PartitionPack\n");
1762 return AVERROR_INVALIDDATA;
1763 }
1764
1765 if (!mxf->current_partition->essence_offset) {
1766 compute_partition_essence_offset(s, mxf, &klv);
1767 }
1768
1769 if (!essence_offset)
1770 essence_offset = klv.offset;
1771
1772 /* seek to footer, previous partition or stop */
1773 if (mxf_parse_handle_essence(mxf) <= 0)
1774 break;
1775 continue;
1776 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1777 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1778 /* next partition pack - keep going, seek to previous partition or stop */
1779 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1780 break;
1781 }
1782
1783 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1784 if (IS_KLV_KEY(klv.key, metadata->key)) {
1785 int res;
1786 if (klv.key[5] == 0x53) {
1787 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1788 } else {
1789 uint64_t next = avio_tell(s->pb) + klv.length;
1790 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1791
1792 /* only seek forward, else this can loop for a long time */
1793 if (avio_tell(s->pb) > next) {
1794 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1795 klv.offset);
1796 return AVERROR_INVALIDDATA;
1797 }
1798
1799 avio_seek(s->pb, next, SEEK_SET);
1800 }
1801 if (res < 0) {
1802 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1803 return res;
1804 }
1805 break;
1806 }
1807 }
1808 if (!metadata->read)
1809 avio_skip(s->pb, klv.length);
1810 }
1811 /* FIXME avoid seek */
1812 if (!essence_offset) {
1813 av_log(s, AV_LOG_ERROR, "no essence\n");
1814 return AVERROR_INVALIDDATA;
1815 }
1816 avio_seek(s->pb, essence_offset, SEEK_SET);
1817
1818 mxf_compute_essence_containers(mxf);
1819
1820 /* we need to do this before computing the index tables
1821 * to be able to fill in zero IndexDurations with st->duration */
1822 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1823 return ret;
1824
1825 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1826 return ret;
1827
1828 if (mxf->nb_index_tables > 1) {
1829 /* TODO: look up which IndexSID to use via EssenceContainerData */
1830 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1831 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1832 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1833 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1834 return AVERROR_INVALIDDATA;
1835 }
1836
1837 mxf_handle_small_eubc(s);
1838
1839 return 0;
1840 }
1841
1842 /**
1843 * Computes DTS and PTS for the given video packet based on its offset.
1844 */
1845 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1846 {
1847 int64_t last_ofs = -1, next_ofs;
1848 MXFIndexTable *t = &mxf->index_tables[0];
1849
1850 /* this is called from the OP1a demuxing logic, which means there
1851 * may be no index tables */
1852 if (mxf->nb_index_tables <= 0)
1853 return;
1854
1855 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1856 while (mxf->current_edit_unit >= 0) {
1857 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1858 break;
1859
1860 if (next_ofs <= last_ofs) {
1861 /* large next_ofs didn't change or current_edit_unit wrapped
1862 * around this fixes the infinite loop on zzuf3.mxf */
1863 av_log(mxf->fc, AV_LOG_ERROR,
1864 "next_ofs didn't change. not deriving packet timestamps\n");
1865 return;
1866 }
1867
1868 if (next_ofs > pkt->pos)
1869 break;
1870
1871 last_ofs = next_ofs;
1872 mxf->current_edit_unit++;
1873 }
1874
1875 if (mxf->current_edit_unit < 0 || mxf->current_edit_unit >= t->nb_ptses)
1876 return;
1877
1878 pkt->dts = mxf->current_edit_unit + t->first_dts;
1879 pkt->pts = t->ptses[mxf->current_edit_unit];
1880 }
1881
1882 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1883 {
1884 KLVPacket klv;
1885
1886 while (!s->pb->eof_reached) {
1887 if (klv_read_packet(&klv, s->pb) < 0)
1888 return -1;
1889 PRINT_KEY(s, "read packet", klv.key);
1890 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1891 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1892 int res = mxf_decrypt_triplet(s, pkt, &klv);
1893 if (res < 0) {
1894 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1895 return -1;
1896 }
1897 return 0;
1898 }
1899 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1900 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1901 int index = mxf_get_stream_index(s, &klv);
1902 if (index < 0) {
1903 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1904 goto skip;
1905 }
1906 if (s->streams[index]->discard == AVDISCARD_ALL)
1907 goto skip;
1908 /* check for 8 channels AES3 element */
1909 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1910 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1911 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1912 return -1;
1913 }
1914 } else {
1915 int ret = av_get_packet(s->pb, pkt, klv.length);
1916 if (ret < 0)
1917 return ret;
1918 }
1919 pkt->stream_index = index;
1920 pkt->pos = klv.offset;
1921
1922 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1923 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1924
1925 return 0;
1926 } else
1927 skip:
1928 avio_skip(s->pb, klv.length);
1929 }
1930 return AVERROR_EOF;
1931 }
1932
1933 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1934 {
1935 MXFContext *mxf = s->priv_data;
1936 int ret, size;
1937 int64_t ret64, pos, next_pos;
1938 AVStream *st;
1939 MXFIndexTable *t;
1940 int edit_units;
1941
1942 if (mxf->op != OPAtom)
1943 return mxf_read_packet_old(s, pkt);
1944
1945 /* OPAtom - clip wrapped demuxing */
1946 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1947 st = s->streams[0];
1948 t = &mxf->index_tables[0];
1949
1950 if (mxf->current_edit_unit >= st->duration)
1951 return AVERROR_EOF;
1952
1953 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
1954
1955 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1956 return ret;
1957
1958 /* compute size by finding the next edit unit or the end of the essence container
1959 * not pretty, but it works */
1960 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
1961 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1962 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1963 return AVERROR_INVALIDDATA;
1964 }
1965
1966 if ((size = next_pos - pos) <= 0) {
1967 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1968 return AVERROR_INVALIDDATA;
1969 }
1970
1971 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1972 return ret64;
1973
1974 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1975 return ret < 0 ? ret : AVERROR_EOF;
1976
1977 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1978 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1979 pkt->dts = mxf->current_edit_unit + t->first_dts;
1980 pkt->pts = t->ptses[mxf->current_edit_unit];
1981 }
1982
1983 pkt->stream_index = 0;
1984 mxf->current_edit_unit += edit_units;
1985
1986 return 0;
1987 }
1988
1989
1990 static int mxf_read_close(AVFormatContext *s)
1991 {
1992 MXFContext *mxf = s->priv_data;
1993 MXFIndexTableSegment *seg;
1994 int i;
1995
1996 av_freep(&mxf->packages_refs);
1997
1998 for (i = 0; i < s->nb_streams; i++)
1999 s->streams[i]->priv_data = NULL;
2000
2001 for (i = 0; i < mxf->metadata_sets_count; i++) {
2002 switch (mxf->metadata_sets[i]->type) {
2003 case MultipleDescriptor:
2004 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2005 break;
2006 case Sequence:
2007 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2008 break;
2009 case SourcePackage:
2010 case MaterialPackage:
2011 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2012 break;
2013 case IndexTableSegment:
2014 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2015 av_freep(&seg->temporal_offset_entries);
2016 av_freep(&seg->flag_entries);
2017 av_freep(&seg->stream_offset_entries);
2018 break;
2019 default:
2020 break;
2021 }
2022 av_freep(&mxf->metadata_sets[i]);
2023 }
2024 av_freep(&mxf->partitions);
2025 av_freep(&mxf->metadata_sets);
2026 av_freep(&mxf->aesc);
2027 av_freep(&mxf->local_tags);
2028
2029 for (i = 0; i < mxf->nb_index_tables; i++) {
2030 av_freep(&mxf->index_tables[i].segments);
2031 av_freep(&mxf->index_tables[i].ptses);
2032 av_freep(&mxf->index_tables[i].fake_index);
2033 }
2034 av_freep(&mxf->index_tables);
2035
2036 return 0;
2037 }
2038
2039 static int mxf_probe(AVProbeData *p) {
2040 uint8_t *bufp = p->buf;
2041 uint8_t *end = p->buf + p->buf_size;
2042
2043 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2044 return 0;
2045
2046 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2047 end -= sizeof(mxf_header_partition_pack_key);
2048 for (; bufp < end; bufp++) {
2049 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2050 return AVPROBE_SCORE_MAX;
2051 }
2052 return 0;
2053 }
2054
2055 /* rudimentary byte seek */
2056 /* XXX: use MXF Index */
2057 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2058 {
2059 AVStream *st = s->streams[stream_index];
2060 int64_t seconds;
2061 MXFContext* mxf = s->priv_data;
2062 int64_t seekpos;
2063 int ret;
2064 MXFIndexTable *t;
2065
2066 if (mxf->index_tables <= 0) {
2067 if (!s->bit_rate)
2068 return AVERROR_INVALIDDATA;
2069 if (sample_time < 0)
2070 sample_time = 0;
2071 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2072
2073 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2074 return ret;
2075 ff_update_cur_dts(s, st, sample_time);
2076 } else {
2077 t = &mxf->index_tables[0];
2078
2079 /* clamp above zero, else ff_index_search_timestamp() returns negative
2080 * this also means we allow seeking before the start */
2081 sample_time = FFMAX(sample_time, 0);
2082
2083 if (t->fake_index) {
2084 /* behave as if we have a proper index */
2085 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2086 return sample_time;
2087 } else {
2088 /* no IndexEntryArray (one or more CBR segments)
2089 * make sure we don't seek past the end */
2090 sample_time = FFMIN(sample_time, st->duration - 1);
2091 }
2092
2093 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2094 return ret;
2095
2096 ff_update_cur_dts(s, st, sample_time);
2097 mxf->current_edit_unit = sample_time;
2098 avio_seek(s->pb, seekpos, SEEK_SET);
2099 }
2100 return 0;
2101 }
2102
2103 AVInputFormat ff_mxf_demuxer = {
2104 .name = "mxf",
2105 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2106 .priv_data_size = sizeof(MXFContext),
2107 .read_probe = mxf_probe,
2108 .read_header = mxf_read_header,
2109 .read_packet = mxf_read_packet,
2110 .read_close = mxf_read_close,
2111 .read_seek = mxf_read_seek,
2112 };