mxfdec: Ignore the last entry in Avid's index table segments
[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 int n = s->nb_index_entries;
1135
1136 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1137 index_delta = 2; /* Avid index */
1138 /* ignore the last entry - it's the size of the essence container */
1139 n--;
1140 }
1141
1142 for (j = 0; j < n; j += index_delta, x++) {
1143 int offset = s->temporal_offset_entries[j] / index_delta;
1144 int index = x + offset;
1145
1146 if (x >= index_table->nb_ptses) {
1147 av_log(mxf->fc, AV_LOG_ERROR,
1148 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1149 s->nb_index_entries, s->index_duration);
1150 break;
1151 }
1152
1153 index_table->fake_index[x].timestamp = x;
1154 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1155
1156 if (index < 0 || index >= index_table->nb_ptses) {
1157 av_log(mxf->fc, AV_LOG_ERROR,
1158 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1159 x, offset, index);
1160 continue;
1161 }
1162
1163 index_table->ptses[index] = x;
1164 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1165 }
1166 }
1167
1168 index_table->first_dts = -max_temporal_offset;
1169
1170 return 0;
1171 }
1172
1173 /**
1174 * Sorts and collects index table segments into index tables.
1175 * Also computes PTSes if possible.
1176 */
1177 static int mxf_compute_index_tables(MXFContext *mxf)
1178 {
1179 int i, j, k, ret, nb_sorted_segments;
1180 MXFIndexTableSegment **sorted_segments = NULL;
1181
1182 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1183 nb_sorted_segments <= 0) {
1184 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1185 return 0;
1186 }
1187
1188 /* sanity check and count unique BodySIDs/IndexSIDs */
1189 for (i = 0; i < nb_sorted_segments; i++) {
1190 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1191 mxf->nb_index_tables++;
1192 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1193 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1194 ret = AVERROR_INVALIDDATA;
1195 goto finish_decoding_index;
1196 }
1197 }
1198
1199 if (mxf->nb_index_tables > INT_MAX >> av_log2(sizeof(MXFIndexTable)) + 1 ||
1200 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1201 sizeof(MXFIndexTable)))) {
1202 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1203 ret = AVERROR(ENOMEM);
1204 goto finish_decoding_index;
1205 }
1206
1207 /* distribute sorted segments to index tables */
1208 for (i = j = 0; i < nb_sorted_segments; i++) {
1209 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1210 /* next IndexSID */
1211 j++;
1212 }
1213
1214 mxf->index_tables[j].nb_segments++;
1215 }
1216
1217 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1218 MXFIndexTable *t = &mxf->index_tables[j];
1219
1220 if (t->nb_segments >
1221 (INT_MAX >> av_log2(sizeof(MXFIndexTableSegment *))) ||
1222 !(t->segments = av_mallocz(t->nb_segments *
1223 sizeof(MXFIndexTableSegment*)))) {
1224 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1225 " pointer array\n");
1226 ret = AVERROR(ENOMEM);
1227 goto finish_decoding_index;
1228 }
1229
1230 if (sorted_segments[i]->index_start_position)
1231 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1232 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1233
1234 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1235 t->index_sid = sorted_segments[i]->index_sid;
1236 t->body_sid = sorted_segments[i]->body_sid;
1237
1238 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1239 goto finish_decoding_index;
1240
1241 /* fix zero IndexDurations */
1242 for (k = 0; k < t->nb_segments; k++) {
1243 if (t->segments[k]->index_duration)
1244 continue;
1245
1246 if (t->nb_segments > 1)
1247 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1248 t->index_sid, k);
1249
1250 if (mxf->fc->nb_streams <= 0) {
1251 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1252 break;
1253 }
1254
1255 /* assume the first stream's duration is reasonable
1256 * leave index_duration = 0 on further segments in case we have any (unlikely)
1257 */
1258 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1259 break;
1260 }
1261 }
1262
1263 ret = 0;
1264 finish_decoding_index:
1265 av_free(sorted_segments);
1266 return ret;
1267 }
1268
1269 static int mxf_parse_structural_metadata(MXFContext *mxf)
1270 {
1271 MXFPackage *material_package = NULL;
1272 MXFPackage *temp_package = NULL;
1273 int i, j, k, ret;
1274
1275 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1276 /* TODO: handle multiple material packages (OP3x) */
1277 for (i = 0; i < mxf->packages_count; i++) {
1278 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1279 if (material_package) break;
1280 }
1281 if (!material_package) {
1282 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1283 return AVERROR_INVALIDDATA;
1284 }
1285
1286 for (i = 0; i < material_package->tracks_count; i++) {
1287 MXFPackage *source_package = NULL;
1288 MXFTrack *material_track = NULL;
1289 MXFTrack *source_track = NULL;
1290 MXFTrack *temp_track = NULL;
1291 MXFDescriptor *descriptor = NULL;
1292 MXFStructuralComponent *component = NULL;
1293 UID *essence_container_ul = NULL;
1294 const MXFCodecUL *codec_ul = NULL;
1295 const MXFCodecUL *container_ul = NULL;
1296 AVStream *st;
1297
1298 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1299 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1300 continue;
1301 }
1302
1303 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1304 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1305 continue;
1306 }
1307
1308 /* TODO: handle multiple source clips */
1309 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1310 /* TODO: handle timecode component */
1311 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1312 if (!component)
1313 continue;
1314
1315 for (k = 0; k < mxf->packages_count; k++) {
1316 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1317 if (!temp_package)
1318 continue;
1319 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1320 source_package = temp_package;
1321 break;
1322 }
1323 }
1324 if (!source_package) {
1325 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1326 break;
1327 }
1328 for (k = 0; k < source_package->tracks_count; k++) {
1329 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1330 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1331 ret = AVERROR_INVALIDDATA;
1332 goto fail_and_free;
1333 }
1334 if (temp_track->track_id == component->source_track_id) {
1335 source_track = temp_track;
1336 break;
1337 }
1338 }
1339 if (!source_track) {
1340 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1341 break;
1342 }
1343 }
1344 if (!source_track || !component)
1345 continue;
1346
1347 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1348 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1349 ret = AVERROR_INVALIDDATA;
1350 goto fail_and_free;
1351 }
1352
1353 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1354 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1355 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1356 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1357 continue;
1358 }
1359
1360 st = avformat_new_stream(mxf->fc, NULL);
1361 if (!st) {
1362 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1363 ret = AVERROR(ENOMEM);
1364 goto fail_and_free;
1365 }
1366 st->id = source_track->track_id;
1367 st->priv_data = source_track;
1368 st->duration = component->duration;
1369 if (st->duration == -1)
1370 st->duration = AV_NOPTS_VALUE;
1371 st->start_time = component->start_position;
1372 avpriv_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
1373
1374 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1375 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1376 st->codec->codec_type = codec_ul->id;
1377
1378 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1379 if (source_package->descriptor) {
1380 if (source_package->descriptor->type == MultipleDescriptor) {
1381 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1382 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1383
1384 if (!sub_descriptor) {
1385 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1386 continue;
1387 }
1388 if (sub_descriptor->linked_track_id == source_track->track_id) {
1389 descriptor = sub_descriptor;
1390 break;
1391 }
1392 }
1393 } else if (source_package->descriptor->type == Descriptor)
1394 descriptor = source_package->descriptor;
1395 }
1396 if (!descriptor) {
1397 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1398 continue;
1399 }
1400 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1401 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1402 essence_container_ul = &descriptor->essence_container_ul;
1403 /* HACK: replacing the original key with mxf_encrypted_essence_container
1404 * is not allowed according to s429-6, try to find correct information anyway */
1405 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1406 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1407 for (k = 0; k < mxf->metadata_sets_count; k++) {
1408 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1409 if (metadata->type == CryptoContext) {
1410 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1411 break;
1412 }
1413 }
1414 }
1415
1416 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1417 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1418 st->codec->codec_id = codec_ul->id;
1419 if (descriptor->extradata) {
1420 st->codec->extradata = descriptor->extradata;
1421 st->codec->extradata_size = descriptor->extradata_size;
1422 }
1423 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1424 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1425 if (st->codec->codec_id == CODEC_ID_NONE)
1426 st->codec->codec_id = container_ul->id;
1427 st->codec->width = descriptor->width;
1428 st->codec->height = descriptor->height;
1429 if (st->codec->codec_id == CODEC_ID_RAWVIDEO)
1430 st->codec->pix_fmt = descriptor->pix_fmt;
1431 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1432 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1433 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1434 if (st->codec->codec_id == CODEC_ID_NONE)
1435 st->codec->codec_id = container_ul->id;
1436 st->codec->channels = descriptor->channels;
1437 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1438
1439 if (descriptor->sample_rate.den > 0)
1440 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1441
1442 /* TODO: implement CODEC_ID_RAWAUDIO */
1443 if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
1444 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1445 st->codec->codec_id = CODEC_ID_PCM_S24LE;
1446 else if (descriptor->bits_per_sample == 32)
1447 st->codec->codec_id = CODEC_ID_PCM_S32LE;
1448 } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
1449 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1450 st->codec->codec_id = CODEC_ID_PCM_S24BE;
1451 else if (descriptor->bits_per_sample == 32)
1452 st->codec->codec_id = CODEC_ID_PCM_S32BE;
1453 } else if (st->codec->codec_id == CODEC_ID_MP2) {
1454 st->need_parsing = AVSTREAM_PARSE_FULL;
1455 }
1456 }
1457 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1458 /* TODO: decode timestamps */
1459 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1460 }
1461 }
1462
1463 ret = 0;
1464 fail_and_free:
1465 return ret;
1466 }
1467
1468 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1469 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1470 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1471 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1472 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1473 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1474 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1475 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1476 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1477 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1478 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1479 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1480 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1481 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1482 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1483 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1484 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1485 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1486 { { 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 */
1487 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1488 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1489 { { 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 */
1490 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1491 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1492 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1493 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1494 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1495 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1496 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1497 };
1498
1499 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1500 {
1501 AVIOContext *pb = mxf->fc->pb;
1502 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1503 uint64_t klv_end = avio_tell(pb) + klv->length;
1504
1505 if (!ctx)
1506 return AVERROR(ENOMEM);
1507 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1508 int ret;
1509 int tag = avio_rb16(pb);
1510 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1511 uint64_t next = avio_tell(pb) + size;
1512 UID uid = {0};
1513
1514 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1515 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1516 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1517 continue;
1518 }
1519 if (tag > 0x7FFF) { /* dynamic tag */
1520 int i;
1521 for (i = 0; i < mxf->local_tags_count; i++) {
1522 int local_tag = AV_RB16(mxf->local_tags+i*18);
1523 if (local_tag == tag) {
1524 memcpy(uid, mxf->local_tags+i*18+2, 16);
1525 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1526 PRINT_KEY(mxf->fc, "uid", uid);
1527 }
1528 }
1529 }
1530 if (ctx_size && tag == 0x3C0A)
1531 avio_read(pb, ctx->uid, 16);
1532 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1533 return ret;
1534
1535 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1536 * it extending past the end of the KLV though (zzuf5.mxf). */
1537 if (avio_tell(pb) > klv_end) {
1538 av_log(mxf->fc, AV_LOG_ERROR,
1539 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1540 tag, klv->offset);
1541 return AVERROR_INVALIDDATA;
1542 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1543 avio_seek(pb, next, SEEK_SET);
1544 }
1545 if (ctx_size) ctx->type = type;
1546 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1547 }
1548
1549 /**
1550 * Seeks to the previous partition, if possible
1551 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1552 */
1553 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1554 {
1555 AVIOContext *pb = mxf->fc->pb;
1556
1557 if (!mxf->current_partition ||
1558 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1559 return 0; /* we've parsed all partitions */
1560
1561 /* seek to previous partition */
1562 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1563 mxf->current_partition = NULL;
1564
1565 av_dlog(mxf->fc, "seeking to previous partition\n");
1566
1567 return 1;
1568 }
1569
1570 /**
1571 * Called when essence is encountered
1572 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1573 */
1574 static int mxf_parse_handle_essence(MXFContext *mxf)
1575 {
1576 AVIOContext *pb = mxf->fc->pb;
1577 int64_t ret;
1578
1579 if (mxf->parsing_backward) {
1580 return mxf_seek_to_previous_partition(mxf);
1581 } else {
1582 if (!mxf->footer_partition) {
1583 av_dlog(mxf->fc, "no footer\n");
1584 return 0;
1585 }
1586
1587 av_dlog(mxf->fc, "seeking to footer\n");
1588
1589 /* remember where we were so we don't end up seeking further back than this */
1590 mxf->last_forward_tell = avio_tell(pb);
1591
1592 if (!pb->seekable) {
1593 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1594 return -1;
1595 }
1596
1597 /* seek to footer partition and parse backward */
1598 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1599 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1600 mxf->run_in + mxf->footer_partition, ret);
1601 return ret;
1602 }
1603
1604 mxf->current_partition = NULL;
1605 mxf->parsing_backward = 1;
1606 }
1607
1608 return 1;
1609 }
1610
1611 /**
1612 * Called when the next partition or EOF is encountered
1613 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1614 */
1615 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1616 {
1617 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1618 }
1619
1620 /**
1621 * Figure out the proper offset and length of the essence container
1622 * in each partition
1623 */
1624 static void mxf_compute_essence_containers(MXFContext *mxf)
1625 {
1626 int x;
1627
1628 /* everything is already correct */
1629 if (mxf->op == OPAtom)
1630 return;
1631
1632 for (x = 0; x < mxf->partitions_count; x++) {
1633 MXFPartition *p = &mxf->partitions[x];
1634
1635 if (!p->body_sid)
1636 continue; /* BodySID == 0 -> no essence */
1637
1638 if (x >= mxf->partitions_count - 1)
1639 break; /* last partition - can't compute length (and we don't need to) */
1640
1641 /* essence container spans to the next partition */
1642 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1643
1644 if (p->essence_length < 0) {
1645 /* next ThisPartition < essence_offset */
1646 p->essence_length = 0;
1647 av_log(mxf->fc, AV_LOG_ERROR,
1648 "partition %i: bad ThisPartition = %"PRIX64"\n",
1649 x+1, mxf->partitions[x+1].this_partition);
1650 }
1651 }
1652 }
1653
1654 static int64_t round_to_kag(int64_t position, int kag_size)
1655 {
1656 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1657 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1658 int64_t ret = (position / kag_size) * kag_size;
1659 return ret == position ? ret : ret + kag_size;
1660 }
1661
1662 static inline void compute_partition_essence_offset(AVFormatContext *s,
1663 MXFContext *mxf,
1664 KLVPacket *klv)
1665 {
1666 MXFPartition *cur_part = mxf->current_partition;
1667 /* for OP1a we compute essence_offset
1668 * for OPAtom we point essence_offset after the KL
1669 * (usually op1a_essence_offset + 20 or 25)
1670 * TODO: for OP1a we could eliminate this entire if statement, always
1671 * stopping parsing at op1a_essence_offset
1672 * for OPAtom we still need the actual essence_offset though
1673 * (the KL's length can vary)
1674 */
1675 int64_t op1a_essence_offset =
1676 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1677 cur_part->kag_size) +
1678 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1679 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1680
1681 if (mxf->op == OPAtom) {
1682 /* point essence_offset to the actual data
1683 * OPAtom has all the essence in one big KLV
1684 */
1685 cur_part->essence_offset = avio_tell(s->pb);
1686 cur_part->essence_length = klv->length;
1687 } else {
1688 /* NOTE: op1a_essence_offset may be less than to klv.offset
1689 * (C0023S01.mxf) */
1690 cur_part->essence_offset = op1a_essence_offset;
1691 }
1692 }
1693
1694 static int is_pcm(enum CodecID codec_id)
1695 {
1696 /* we only care about "normal" PCM codecs until we get samples */
1697 return codec_id >= CODEC_ID_PCM_S16LE && codec_id < CODEC_ID_PCM_S24DAUD;
1698 }
1699
1700 /**
1701 * Deal with the case where for some audio atoms EditUnitByteCount is
1702 * very small (2, 4..). In those cases we should read more than one
1703 * sample per call to mxf_read_packet().
1704 */
1705 static void mxf_handle_small_eubc(AVFormatContext *s)
1706 {
1707 MXFContext *mxf = s->priv_data;
1708
1709 /* assuming non-OPAtom == frame wrapped
1710 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1711 if (mxf->op != OPAtom)
1712 return;
1713
1714 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1715 if (s->nb_streams != 1 ||
1716 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1717 !is_pcm(s->streams[0]->codec->codec_id) ||
1718 mxf->nb_index_tables != 1 ||
1719 mxf->index_tables[0].nb_segments != 1 ||
1720 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1721 return;
1722
1723 /* arbitrarily default to 48 kHz PAL audio frame size */
1724 /* TODO: We could compute this from the ratio between the audio
1725 * and video edit rates for 48 kHz NTSC we could use the
1726 * 1802-1802-1802-1802-1801 pattern. */
1727 mxf->edit_units_per_packet = 1920;
1728 }
1729
1730 static int mxf_read_header(AVFormatContext *s)
1731 {
1732 MXFContext *mxf = s->priv_data;
1733 KLVPacket klv;
1734 int64_t essence_offset = 0;
1735 int ret;
1736
1737 mxf->last_forward_tell = INT64_MAX;
1738 mxf->edit_units_per_packet = 1;
1739
1740 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1741 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1742 return AVERROR_INVALIDDATA;
1743 }
1744 avio_seek(s->pb, -14, SEEK_CUR);
1745 mxf->fc = s;
1746 mxf->run_in = avio_tell(s->pb);
1747
1748 while (!s->pb->eof_reached) {
1749 const MXFMetadataReadTableEntry *metadata;
1750
1751 if (klv_read_packet(&klv, s->pb) < 0) {
1752 /* EOF - seek to previous partition or stop */
1753 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1754 break;
1755 else
1756 continue;
1757 }
1758
1759 PRINT_KEY(s, "read header", klv.key);
1760 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1761 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1762 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1763 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1764 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1765
1766 if (!mxf->current_partition) {
1767 av_log(mxf->fc, AV_LOG_ERROR,
1768 "found essence prior to first PartitionPack\n");
1769 return AVERROR_INVALIDDATA;
1770 }
1771
1772 if (!mxf->current_partition->essence_offset) {
1773 compute_partition_essence_offset(s, mxf, &klv);
1774 }
1775
1776 if (!essence_offset)
1777 essence_offset = klv.offset;
1778
1779 /* seek to footer, previous partition or stop */
1780 if (mxf_parse_handle_essence(mxf) <= 0)
1781 break;
1782 continue;
1783 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1784 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1785 /* next partition pack - keep going, seek to previous partition or stop */
1786 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1787 break;
1788 }
1789
1790 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1791 if (IS_KLV_KEY(klv.key, metadata->key)) {
1792 int res;
1793 if (klv.key[5] == 0x53) {
1794 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1795 } else {
1796 uint64_t next = avio_tell(s->pb) + klv.length;
1797 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1798
1799 /* only seek forward, else this can loop for a long time */
1800 if (avio_tell(s->pb) > next) {
1801 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1802 klv.offset);
1803 return AVERROR_INVALIDDATA;
1804 }
1805
1806 avio_seek(s->pb, next, SEEK_SET);
1807 }
1808 if (res < 0) {
1809 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1810 return res;
1811 }
1812 break;
1813 }
1814 }
1815 if (!metadata->read)
1816 avio_skip(s->pb, klv.length);
1817 }
1818 /* FIXME avoid seek */
1819 if (!essence_offset) {
1820 av_log(s, AV_LOG_ERROR, "no essence\n");
1821 return AVERROR_INVALIDDATA;
1822 }
1823 avio_seek(s->pb, essence_offset, SEEK_SET);
1824
1825 mxf_compute_essence_containers(mxf);
1826
1827 /* we need to do this before computing the index tables
1828 * to be able to fill in zero IndexDurations with st->duration */
1829 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1830 return ret;
1831
1832 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1833 return ret;
1834
1835 if (mxf->nb_index_tables > 1) {
1836 /* TODO: look up which IndexSID to use via EssenceContainerData */
1837 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1838 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1839 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1840 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1841 return AVERROR_INVALIDDATA;
1842 }
1843
1844 mxf_handle_small_eubc(s);
1845
1846 return 0;
1847 }
1848
1849 /**
1850 * Computes DTS and PTS for the given video packet based on its offset.
1851 */
1852 static void mxf_packet_timestamps(MXFContext *mxf, AVPacket *pkt)
1853 {
1854 int64_t last_ofs = -1, next_ofs;
1855 MXFIndexTable *t = &mxf->index_tables[0];
1856
1857 /* this is called from the OP1a demuxing logic, which means there
1858 * may be no index tables */
1859 if (mxf->nb_index_tables <= 0)
1860 return;
1861
1862 /* find mxf->current_edit_unit so that the next edit unit starts ahead of pkt->pos */
1863 while (mxf->current_edit_unit >= 0) {
1864 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
1865 break;
1866
1867 if (next_ofs <= last_ofs) {
1868 /* large next_ofs didn't change or current_edit_unit wrapped
1869 * around this fixes the infinite loop on zzuf3.mxf */
1870 av_log(mxf->fc, AV_LOG_ERROR,
1871 "next_ofs didn't change. not deriving packet timestamps\n");
1872 return;
1873 }
1874
1875 if (next_ofs > pkt->pos)
1876 break;
1877
1878 last_ofs = next_ofs;
1879 mxf->current_edit_unit++;
1880 }
1881
1882 if (mxf->current_edit_unit < 0 || mxf->current_edit_unit >= t->nb_ptses)
1883 return;
1884
1885 pkt->dts = mxf->current_edit_unit + t->first_dts;
1886 pkt->pts = t->ptses[mxf->current_edit_unit];
1887 }
1888
1889 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1890 {
1891 KLVPacket klv;
1892
1893 while (!s->pb->eof_reached) {
1894 if (klv_read_packet(&klv, s->pb) < 0)
1895 return -1;
1896 PRINT_KEY(s, "read packet", klv.key);
1897 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1898 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1899 int res = mxf_decrypt_triplet(s, pkt, &klv);
1900 if (res < 0) {
1901 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1902 return -1;
1903 }
1904 return 0;
1905 }
1906 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1907 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
1908 int index = mxf_get_stream_index(s, &klv);
1909 if (index < 0) {
1910 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
1911 goto skip;
1912 }
1913 if (s->streams[index]->discard == AVDISCARD_ALL)
1914 goto skip;
1915 /* check for 8 channels AES3 element */
1916 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
1917 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
1918 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
1919 return -1;
1920 }
1921 } else {
1922 int ret = av_get_packet(s->pb, pkt, klv.length);
1923 if (ret < 0)
1924 return ret;
1925 }
1926 pkt->stream_index = index;
1927 pkt->pos = klv.offset;
1928
1929 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
1930 mxf_packet_timestamps(s->priv_data, pkt); /* offset -> EditUnit -> DTS/PTS */
1931
1932 return 0;
1933 } else
1934 skip:
1935 avio_skip(s->pb, klv.length);
1936 }
1937 return AVERROR_EOF;
1938 }
1939
1940 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
1941 {
1942 MXFContext *mxf = s->priv_data;
1943 int ret, size;
1944 int64_t ret64, pos, next_pos;
1945 AVStream *st;
1946 MXFIndexTable *t;
1947 int edit_units;
1948
1949 if (mxf->op != OPAtom)
1950 return mxf_read_packet_old(s, pkt);
1951
1952 /* OPAtom - clip wrapped demuxing */
1953 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
1954 st = s->streams[0];
1955 t = &mxf->index_tables[0];
1956
1957 if (mxf->current_edit_unit >= st->duration)
1958 return AVERROR_EOF;
1959
1960 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
1961
1962 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
1963 return ret;
1964
1965 /* compute size by finding the next edit unit or the end of the essence container
1966 * not pretty, but it works */
1967 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
1968 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
1969 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
1970 return AVERROR_INVALIDDATA;
1971 }
1972
1973 if ((size = next_pos - pos) <= 0) {
1974 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
1975 return AVERROR_INVALIDDATA;
1976 }
1977
1978 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
1979 return ret64;
1980
1981 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
1982 return ret < 0 ? ret : AVERROR_EOF;
1983
1984 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
1985 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
1986 pkt->dts = mxf->current_edit_unit + t->first_dts;
1987 pkt->pts = t->ptses[mxf->current_edit_unit];
1988 }
1989
1990 pkt->stream_index = 0;
1991 mxf->current_edit_unit += edit_units;
1992
1993 return 0;
1994 }
1995
1996
1997 static int mxf_read_close(AVFormatContext *s)
1998 {
1999 MXFContext *mxf = s->priv_data;
2000 MXFIndexTableSegment *seg;
2001 int i;
2002
2003 av_freep(&mxf->packages_refs);
2004
2005 for (i = 0; i < s->nb_streams; i++)
2006 s->streams[i]->priv_data = NULL;
2007
2008 for (i = 0; i < mxf->metadata_sets_count; i++) {
2009 switch (mxf->metadata_sets[i]->type) {
2010 case MultipleDescriptor:
2011 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2012 break;
2013 case Sequence:
2014 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2015 break;
2016 case SourcePackage:
2017 case MaterialPackage:
2018 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2019 break;
2020 case IndexTableSegment:
2021 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2022 av_freep(&seg->temporal_offset_entries);
2023 av_freep(&seg->flag_entries);
2024 av_freep(&seg->stream_offset_entries);
2025 break;
2026 default:
2027 break;
2028 }
2029 av_freep(&mxf->metadata_sets[i]);
2030 }
2031 av_freep(&mxf->partitions);
2032 av_freep(&mxf->metadata_sets);
2033 av_freep(&mxf->aesc);
2034 av_freep(&mxf->local_tags);
2035
2036 for (i = 0; i < mxf->nb_index_tables; i++) {
2037 av_freep(&mxf->index_tables[i].segments);
2038 av_freep(&mxf->index_tables[i].ptses);
2039 av_freep(&mxf->index_tables[i].fake_index);
2040 }
2041 av_freep(&mxf->index_tables);
2042
2043 return 0;
2044 }
2045
2046 static int mxf_probe(AVProbeData *p) {
2047 uint8_t *bufp = p->buf;
2048 uint8_t *end = p->buf + p->buf_size;
2049
2050 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2051 return 0;
2052
2053 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2054 end -= sizeof(mxf_header_partition_pack_key);
2055 for (; bufp < end; bufp++) {
2056 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2057 return AVPROBE_SCORE_MAX;
2058 }
2059 return 0;
2060 }
2061
2062 /* rudimentary byte seek */
2063 /* XXX: use MXF Index */
2064 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2065 {
2066 AVStream *st = s->streams[stream_index];
2067 int64_t seconds;
2068 MXFContext* mxf = s->priv_data;
2069 int64_t seekpos;
2070 int ret;
2071 MXFIndexTable *t;
2072
2073 if (mxf->index_tables <= 0) {
2074 if (!s->bit_rate)
2075 return AVERROR_INVALIDDATA;
2076 if (sample_time < 0)
2077 sample_time = 0;
2078 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2079
2080 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2081 return ret;
2082 ff_update_cur_dts(s, st, sample_time);
2083 } else {
2084 t = &mxf->index_tables[0];
2085
2086 /* clamp above zero, else ff_index_search_timestamp() returns negative
2087 * this also means we allow seeking before the start */
2088 sample_time = FFMAX(sample_time, 0);
2089
2090 if (t->fake_index) {
2091 /* behave as if we have a proper index */
2092 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2093 return sample_time;
2094 } else {
2095 /* no IndexEntryArray (one or more CBR segments)
2096 * make sure we don't seek past the end */
2097 sample_time = FFMIN(sample_time, st->duration - 1);
2098 }
2099
2100 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2101 return ret;
2102
2103 ff_update_cur_dts(s, st, sample_time);
2104 mxf->current_edit_unit = sample_time;
2105 avio_seek(s->pb, seekpos, SEEK_SET);
2106 }
2107 return 0;
2108 }
2109
2110 AVInputFormat ff_mxf_demuxer = {
2111 .name = "mxf",
2112 .long_name = NULL_IF_CONFIG_SMALL("Material eXchange Format"),
2113 .priv_data_size = sizeof(MXFContext),
2114 .read_probe = mxf_probe,
2115 .read_header = mxf_read_header,
2116 .read_packet = mxf_read_packet,
2117 .read_close = mxf_read_close,
2118 .read_seek = mxf_read_seek,
2119 };