Replace PIX_FMT_* -> AV_PIX_FMT_*, PixelFormat -> AVPixelFormat
[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 int intra_only;
125 } MXFTrack;
126
127 typedef struct {
128 UID uid;
129 enum MXFMetadataSetType type;
130 UID essence_container_ul;
131 UID essence_codec_ul;
132 AVRational sample_rate;
133 AVRational aspect_ratio;
134 int width;
135 int height; /* Field height, not frame height */
136 int frame_layout; /* See MXFFrameLayout enum */
137 int channels;
138 int bits_per_sample;
139 unsigned int component_depth;
140 unsigned int horiz_subsampling;
141 unsigned int vert_subsampling;
142 UID *sub_descriptors_refs;
143 int sub_descriptors_count;
144 int linked_track_id;
145 uint8_t *extradata;
146 int extradata_size;
147 enum AVPixelFormat pix_fmt;
148 } MXFDescriptor;
149
150 typedef struct {
151 UID uid;
152 enum MXFMetadataSetType type;
153 int edit_unit_byte_count;
154 int index_sid;
155 int body_sid;
156 AVRational index_edit_rate;
157 uint64_t index_start_position;
158 uint64_t index_duration;
159 int8_t *temporal_offset_entries;
160 int *flag_entries;
161 uint64_t *stream_offset_entries;
162 int nb_index_entries;
163 } MXFIndexTableSegment;
164
165 typedef struct {
166 UID uid;
167 enum MXFMetadataSetType type;
168 UID package_uid;
169 UID *tracks_refs;
170 int tracks_count;
171 MXFDescriptor *descriptor; /* only one */
172 UID descriptor_ref;
173 } MXFPackage;
174
175 typedef struct {
176 UID uid;
177 enum MXFMetadataSetType type;
178 } MXFMetadataSet;
179
180 /* decoded index table */
181 typedef struct {
182 int index_sid;
183 int body_sid;
184 int nb_ptses; /* number of PTSes or total duration of index */
185 int64_t first_dts; /* DTS = EditUnit + first_dts */
186 int64_t *ptses; /* maps EditUnit -> PTS */
187 int nb_segments;
188 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
189 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
190 } MXFIndexTable;
191
192 typedef struct {
193 MXFPartition *partitions;
194 unsigned partitions_count;
195 MXFOP op;
196 UID *packages_refs;
197 int packages_count;
198 MXFMetadataSet **metadata_sets;
199 int metadata_sets_count;
200 AVFormatContext *fc;
201 struct AVAES *aesc;
202 uint8_t *local_tags;
203 int local_tags_count;
204 uint64_t footer_partition;
205 KLVPacket current_klv_data;
206 int current_klv_index;
207 int run_in;
208 MXFPartition *current_partition;
209 int parsing_backward;
210 int64_t last_forward_tell;
211 int last_forward_partition;
212 int current_edit_unit;
213 int nb_index_tables;
214 MXFIndexTable *index_tables;
215 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
216 } MXFContext;
217
218 enum MXFWrappingScheme {
219 Frame,
220 Clip,
221 };
222
223 /* NOTE: klv_offset is not set (-1) for local keys */
224 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
225
226 typedef struct {
227 const UID key;
228 MXFMetadataReadFunc *read;
229 int ctx_size;
230 enum MXFMetadataSetType type;
231 } MXFMetadataReadTableEntry;
232
233 /* partial keys to match */
234 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
235 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
236 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
237 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
238 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
239 /* complete keys to match */
240 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 };
241 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
242 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
243 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
244
245 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
246
247 static int64_t klv_decode_ber_length(AVIOContext *pb)
248 {
249 uint64_t size = avio_r8(pb);
250 if (size & 0x80) { /* long form */
251 int bytes_num = size & 0x7f;
252 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
253 if (bytes_num > 8)
254 return AVERROR_INVALIDDATA;
255 size = 0;
256 while (bytes_num--)
257 size = size << 8 | avio_r8(pb);
258 }
259 return size;
260 }
261
262 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
263 {
264 int i, b;
265 for (i = 0; i < size && !pb->eof_reached; i++) {
266 b = avio_r8(pb);
267 if (b == key[0])
268 i = 0;
269 else if (b != key[i])
270 i = -1;
271 }
272 return i == size;
273 }
274
275 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
276 {
277 if (!mxf_read_sync(pb, mxf_klv_key, 4))
278 return AVERROR_INVALIDDATA;
279 klv->offset = avio_tell(pb) - 4;
280 memcpy(klv->key, mxf_klv_key, 4);
281 avio_read(pb, klv->key + 4, 12);
282 klv->length = klv_decode_ber_length(pb);
283 return klv->length == -1 ? -1 : 0;
284 }
285
286 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
287 {
288 int i;
289
290 for (i = 0; i < s->nb_streams; i++) {
291 MXFTrack *track = s->streams[i]->priv_data;
292 /* SMPTE 379M 7.3 */
293 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
294 return i;
295 }
296 /* return 0 if only one stream, for OP Atom files with 0 as track number */
297 return s->nb_streams == 1 ? 0 : -1;
298 }
299
300 /* XXX: use AVBitStreamFilter */
301 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
302 {
303 const uint8_t *buf_ptr, *end_ptr;
304 uint8_t *data_ptr;
305 int i;
306
307 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
308 return AVERROR_INVALIDDATA;
309 length = av_get_packet(pb, pkt, length);
310 if (length < 0)
311 return length;
312 data_ptr = pkt->data;
313 end_ptr = pkt->data + length;
314 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
315 for (; buf_ptr + st->codec->channels*4 < end_ptr; ) {
316 for (i = 0; i < st->codec->channels; i++) {
317 uint32_t sample = bytestream_get_le32(&buf_ptr);
318 if (st->codec->bits_per_coded_sample == 24)
319 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
320 else
321 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
322 }
323 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
324 }
325 av_shrink_packet(pkt, data_ptr - pkt->data);
326 return 0;
327 }
328
329 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
330 {
331 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
332 MXFContext *mxf = s->priv_data;
333 AVIOContext *pb = s->pb;
334 int64_t end = avio_tell(pb) + klv->length;
335 int64_t size;
336 uint64_t orig_size;
337 uint64_t plaintext_size;
338 uint8_t ivec[16];
339 uint8_t tmpbuf[16];
340 int index;
341
342 if (!mxf->aesc && s->key && s->keylen == 16) {
343 mxf->aesc = av_malloc(av_aes_size);
344 if (!mxf->aesc)
345 return AVERROR(ENOMEM);
346 av_aes_init(mxf->aesc, s->key, 128, 1);
347 }
348 // crypto context
349 avio_skip(pb, klv_decode_ber_length(pb));
350 // plaintext offset
351 klv_decode_ber_length(pb);
352 plaintext_size = avio_rb64(pb);
353 // source klv key
354 klv_decode_ber_length(pb);
355 avio_read(pb, klv->key, 16);
356 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
357 return AVERROR_INVALIDDATA;
358 index = mxf_get_stream_index(s, klv);
359 if (index < 0)
360 return AVERROR_INVALIDDATA;
361 // source size
362 klv_decode_ber_length(pb);
363 orig_size = avio_rb64(pb);
364 if (orig_size < plaintext_size)
365 return AVERROR_INVALIDDATA;
366 // enc. code
367 size = klv_decode_ber_length(pb);
368 if (size < 32 || size - 32 < orig_size)
369 return AVERROR_INVALIDDATA;
370 avio_read(pb, ivec, 16);
371 avio_read(pb, tmpbuf, 16);
372 if (mxf->aesc)
373 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
374 if (memcmp(tmpbuf, checkv, 16))
375 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
376 size -= 32;
377 size = av_get_packet(pb, pkt, size);
378 if (size < 0)
379 return size;
380 else if (size < plaintext_size)
381 return AVERROR_INVALIDDATA;
382 size -= plaintext_size;
383 if (mxf->aesc)
384 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
385 &pkt->data[plaintext_size], size >> 4, ivec, 1);
386 av_shrink_packet(pkt, orig_size);
387 pkt->stream_index = index;
388 avio_skip(pb, end - avio_tell(pb));
389 return 0;
390 }
391
392 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
393 {
394 MXFContext *mxf = arg;
395 int item_num = avio_rb32(pb);
396 int item_len = avio_rb32(pb);
397
398 if (item_len != 18) {
399 av_log_ask_for_sample(pb, "unsupported primer pack item length %d\n",
400 item_len);
401 return AVERROR_PATCHWELCOME;
402 }
403 if (item_num > UINT_MAX / item_len)
404 return AVERROR_INVALIDDATA;
405 mxf->local_tags_count = item_num;
406 mxf->local_tags = av_malloc(item_num*item_len);
407 if (!mxf->local_tags)
408 return AVERROR(ENOMEM);
409 avio_read(pb, mxf->local_tags, item_num*item_len);
410 return 0;
411 }
412
413 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
414 {
415 MXFContext *mxf = arg;
416 MXFPartition *partition, *tmp_part;
417 UID op;
418 uint64_t footer_partition;
419 uint32_t nb_essence_containers;
420
421 if (mxf->partitions_count+1 >= UINT_MAX / sizeof(*mxf->partitions))
422 return AVERROR(ENOMEM);
423
424 tmp_part = av_realloc(mxf->partitions, (mxf->partitions_count + 1) * sizeof(*mxf->partitions));
425 if (!tmp_part)
426 return AVERROR(ENOMEM);
427 mxf->partitions = tmp_part;
428
429 if (mxf->parsing_backward) {
430 /* insert the new partition pack in the middle
431 * this makes the entries in mxf->partitions sorted by offset */
432 memmove(&mxf->partitions[mxf->last_forward_partition+1],
433 &mxf->partitions[mxf->last_forward_partition],
434 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
435 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
436 } else {
437 mxf->last_forward_partition++;
438 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
439 }
440
441 memset(partition, 0, sizeof(*partition));
442 mxf->partitions_count++;
443 partition->pack_length = avio_tell(pb) - klv_offset + size;
444
445 switch(uid[13]) {
446 case 2:
447 partition->type = Header;
448 break;
449 case 3:
450 partition->type = BodyPartition;
451 break;
452 case 4:
453 partition->type = Footer;
454 break;
455 default:
456 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
457 return AVERROR_INVALIDDATA;
458 }
459
460 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
461 partition->closed = partition->type == Footer || !(uid[14] & 1);
462 partition->complete = uid[14] > 2;
463 avio_skip(pb, 4);
464 partition->kag_size = avio_rb32(pb);
465 partition->this_partition = avio_rb64(pb);
466 partition->previous_partition = avio_rb64(pb);
467 footer_partition = avio_rb64(pb);
468 partition->header_byte_count = avio_rb64(pb);
469 partition->index_byte_count = avio_rb64(pb);
470 partition->index_sid = avio_rb32(pb);
471 avio_skip(pb, 8);
472 partition->body_sid = avio_rb32(pb);
473 avio_read(pb, op, sizeof(UID));
474 nb_essence_containers = avio_rb32(pb);
475
476 /* some files don'thave FooterPartition set in every partition */
477 if (footer_partition) {
478 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
479 av_log(mxf->fc, AV_LOG_ERROR,
480 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
481 mxf->footer_partition, footer_partition);
482 } else {
483 mxf->footer_partition = footer_partition;
484 }
485 }
486
487 av_dlog(mxf->fc,
488 "PartitionPack: ThisPartition = 0x%"PRIX64
489 ", PreviousPartition = 0x%"PRIX64", "
490 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
491 partition->this_partition,
492 partition->previous_partition, footer_partition,
493 partition->index_sid, partition->body_sid);
494
495 /* sanity check PreviousPartition if set */
496 if (partition->previous_partition &&
497 mxf->run_in + partition->previous_partition >= klv_offset) {
498 av_log(mxf->fc, AV_LOG_ERROR,
499 "PreviousPartition points to this partition or forward\n");
500 return AVERROR_INVALIDDATA;
501 }
502
503 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
504 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
505 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
506 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
507 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
508 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
509 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
510 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
511 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
512 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
513 else if (op[12] == 0x10) {
514 /* SMPTE 390m: "There shall be exactly one essence container"
515 * The following block deals with files that violate this, namely:
516 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
517 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
518 if (nb_essence_containers != 1) {
519 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
520
521 /* only nag once */
522 if (!mxf->op)
523 av_log(mxf->fc, AV_LOG_WARNING,
524 "\"OPAtom\" with %u ECs - assuming %s\n",
525 nb_essence_containers,
526 op == OP1a ? "OP1a" : "OPAtom");
527
528 mxf->op = op;
529 } else
530 mxf->op = OPAtom;
531 } else {
532 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
533 mxf->op = OP1a;
534 }
535
536 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
537 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
538
539 if (mxf->op == OPSonyOpt)
540 partition->kag_size = 512;
541 else
542 partition->kag_size = 1;
543
544 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
545 }
546
547 return 0;
548 }
549
550 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
551 {
552 MXFMetadataSet **tmp;
553 if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
554 return AVERROR(ENOMEM);
555 tmp = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
556 if (!tmp)
557 return AVERROR(ENOMEM);
558 mxf->metadata_sets = tmp;
559 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
560 mxf->metadata_sets_count++;
561 return 0;
562 }
563
564 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
565 {
566 MXFCryptoContext *cryptocontext = arg;
567 if (size != 16)
568 return AVERROR_INVALIDDATA;
569 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
570 avio_read(pb, cryptocontext->source_container_ul, 16);
571 return 0;
572 }
573
574 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
575 {
576 MXFContext *mxf = arg;
577 switch (tag) {
578 case 0x1901:
579 mxf->packages_count = avio_rb32(pb);
580 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
581 return AVERROR_INVALIDDATA;
582 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
583 if (!mxf->packages_refs)
584 return AVERROR(ENOMEM);
585 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
586 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
587 break;
588 }
589 return 0;
590 }
591
592 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
593 {
594 MXFStructuralComponent *source_clip = arg;
595 switch(tag) {
596 case 0x0202:
597 source_clip->duration = avio_rb64(pb);
598 break;
599 case 0x1201:
600 source_clip->start_position = avio_rb64(pb);
601 break;
602 case 0x1101:
603 /* UMID, only get last 16 bytes */
604 avio_skip(pb, 16);
605 avio_read(pb, source_clip->source_package_uid, 16);
606 break;
607 case 0x1102:
608 source_clip->source_track_id = avio_rb32(pb);
609 break;
610 }
611 return 0;
612 }
613
614 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
615 {
616 MXFPackage *package = arg;
617 switch(tag) {
618 case 0x4403:
619 package->tracks_count = avio_rb32(pb);
620 if (package->tracks_count >= UINT_MAX / sizeof(UID))
621 return AVERROR_INVALIDDATA;
622 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
623 if (!package->tracks_refs)
624 return AVERROR(ENOMEM);
625 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
626 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
627 break;
628 }
629 return 0;
630 }
631
632 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
633 {
634 MXFTrack *track = arg;
635 switch(tag) {
636 case 0x4801:
637 track->track_id = avio_rb32(pb);
638 break;
639 case 0x4804:
640 avio_read(pb, track->track_number, 4);
641 break;
642 case 0x4B01:
643 track->edit_rate.num = avio_rb32(pb);
644 track->edit_rate.den = avio_rb32(pb);
645 break;
646 case 0x4803:
647 avio_read(pb, track->sequence_ref, 16);
648 break;
649 }
650 return 0;
651 }
652
653 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
654 {
655 MXFSequence *sequence = arg;
656 switch(tag) {
657 case 0x0202:
658 sequence->duration = avio_rb64(pb);
659 break;
660 case 0x0201:
661 avio_read(pb, sequence->data_definition_ul, 16);
662 break;
663 case 0x1001:
664 sequence->structural_components_count = avio_rb32(pb);
665 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
666 return AVERROR_INVALIDDATA;
667 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
668 if (!sequence->structural_components_refs)
669 return AVERROR(ENOMEM);
670 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
671 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
672 break;
673 }
674 return 0;
675 }
676
677 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
678 {
679 MXFPackage *package = arg;
680 switch(tag) {
681 case 0x4403:
682 package->tracks_count = avio_rb32(pb);
683 if (package->tracks_count >= UINT_MAX / sizeof(UID))
684 return AVERROR_INVALIDDATA;
685 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
686 if (!package->tracks_refs)
687 return AVERROR(ENOMEM);
688 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
689 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
690 break;
691 case 0x4401:
692 /* UMID, only get last 16 bytes */
693 avio_skip(pb, 16);
694 avio_read(pb, package->package_uid, 16);
695 break;
696 case 0x4701:
697 avio_read(pb, package->descriptor_ref, 16);
698 break;
699 }
700 return 0;
701 }
702
703 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
704 {
705 int i, length;
706
707 segment->nb_index_entries = avio_rb32(pb);
708 if (!segment->nb_index_entries)
709 return 0;
710 else if (segment->nb_index_entries < 0 ||
711 segment->nb_index_entries >
712 (INT_MAX / sizeof(*segment->stream_offset_entries)))
713 return AVERROR(ENOMEM);
714
715 length = avio_rb32(pb);
716
717 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
718 sizeof(*segment->temporal_offset_entries));
719 segment->flag_entries = av_mallocz(segment->nb_index_entries *
720 sizeof(*segment->flag_entries));
721 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
722 sizeof(*segment->stream_offset_entries));
723
724 if (!segment->flag_entries || !segment->stream_offset_entries ||
725 !segment->temporal_offset_entries) {
726 av_freep(&segment->flag_entries);
727 av_freep(&segment->stream_offset_entries);
728 av_freep(&segment->temporal_offset_entries);
729 return AVERROR(ENOMEM);
730 }
731
732 for (i = 0; i < segment->nb_index_entries; i++) {
733 segment->temporal_offset_entries[i] = avio_r8(pb);
734 avio_r8(pb); /* KeyFrameOffset */
735 segment->flag_entries[i] = avio_r8(pb);
736 segment->stream_offset_entries[i] = avio_rb64(pb);
737 avio_skip(pb, length - 11);
738 }
739 return 0;
740 }
741
742 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
743 {
744 MXFIndexTableSegment *segment = arg;
745 switch(tag) {
746 case 0x3F05:
747 segment->edit_unit_byte_count = avio_rb32(pb);
748 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
749 break;
750 case 0x3F06:
751 segment->index_sid = avio_rb32(pb);
752 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
753 break;
754 case 0x3F07:
755 segment->body_sid = avio_rb32(pb);
756 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
757 break;
758 case 0x3F0A:
759 av_dlog(NULL, "IndexEntryArray found\n");
760 return mxf_read_index_entry_array(pb, segment);
761 case 0x3F0B:
762 segment->index_edit_rate.num = avio_rb32(pb);
763 segment->index_edit_rate.den = avio_rb32(pb);
764 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
765 segment->index_edit_rate.den);
766 break;
767 case 0x3F0C:
768 segment->index_start_position = avio_rb64(pb);
769 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
770 break;
771 case 0x3F0D:
772 segment->index_duration = avio_rb64(pb);
773 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
774 break;
775 }
776 return 0;
777 }
778
779 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
780 {
781 int code, value, ofs = 0;
782 char layout[16] = {0};
783
784 do {
785 code = avio_r8(pb);
786 value = avio_r8(pb);
787 av_dlog(NULL, "pixel layout: code %#x\n", code);
788
789 if (ofs < 16) {
790 layout[ofs++] = code;
791 layout[ofs++] = value;
792 }
793 } while (code != 0); /* SMPTE 377M E.2.46 */
794
795 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
796 }
797
798 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
799 {
800 MXFDescriptor *descriptor = arg;
801 descriptor->pix_fmt = AV_PIX_FMT_NONE;
802 switch(tag) {
803 case 0x3F01:
804 descriptor->sub_descriptors_count = avio_rb32(pb);
805 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
806 return AVERROR_INVALIDDATA;
807 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
808 if (!descriptor->sub_descriptors_refs)
809 return AVERROR(ENOMEM);
810 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
811 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
812 break;
813 case 0x3004:
814 avio_read(pb, descriptor->essence_container_ul, 16);
815 break;
816 case 0x3006:
817 descriptor->linked_track_id = avio_rb32(pb);
818 break;
819 case 0x3201: /* PictureEssenceCoding */
820 avio_read(pb, descriptor->essence_codec_ul, 16);
821 break;
822 case 0x3203:
823 descriptor->width = avio_rb32(pb);
824 break;
825 case 0x3202:
826 descriptor->height = avio_rb32(pb);
827 break;
828 case 0x320C:
829 descriptor->frame_layout = avio_r8(pb);
830 break;
831 case 0x320E:
832 descriptor->aspect_ratio.num = avio_rb32(pb);
833 descriptor->aspect_ratio.den = avio_rb32(pb);
834 break;
835 case 0x3301:
836 descriptor->component_depth = avio_rb32(pb);
837 break;
838 case 0x3302:
839 descriptor->horiz_subsampling = avio_rb32(pb);
840 break;
841 case 0x3308:
842 descriptor->vert_subsampling = avio_rb32(pb);
843 break;
844 case 0x3D03:
845 descriptor->sample_rate.num = avio_rb32(pb);
846 descriptor->sample_rate.den = avio_rb32(pb);
847 break;
848 case 0x3D06: /* SoundEssenceCompression */
849 avio_read(pb, descriptor->essence_codec_ul, 16);
850 break;
851 case 0x3D07:
852 descriptor->channels = avio_rb32(pb);
853 break;
854 case 0x3D01:
855 descriptor->bits_per_sample = avio_rb32(pb);
856 break;
857 case 0x3401:
858 mxf_read_pixel_layout(pb, descriptor);
859 break;
860 default:
861 /* Private uid used by SONY C0023S01.mxf */
862 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
863 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
864 if (!descriptor->extradata)
865 return AVERROR(ENOMEM);
866 descriptor->extradata_size = size;
867 avio_read(pb, descriptor->extradata, size);
868 }
869 break;
870 }
871 return 0;
872 }
873
874 /*
875 * Match an uid independently of the version byte and up to len common bytes
876 * Returns: boolean
877 */
878 static int mxf_match_uid(const UID key, const UID uid, int len)
879 {
880 int i;
881 for (i = 0; i < len; i++) {
882 if (i != 7 && key[i] != uid[i])
883 return 0;
884 }
885 return 1;
886 }
887
888 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
889 {
890 while (uls->uid[0]) {
891 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
892 break;
893 uls++;
894 }
895 return uls;
896 }
897
898 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
899 {
900 int i;
901
902 if (!strong_ref)
903 return NULL;
904 for (i = 0; i < mxf->metadata_sets_count; i++) {
905 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
906 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
907 return mxf->metadata_sets[i];
908 }
909 }
910 return NULL;
911 }
912
913 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
914 // video essence container uls
915 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
916 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
917 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
918 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
919 };
920
921 /* EC ULs for intra-only formats */
922 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
923 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x00,0x00 }, 14, AV_CODEC_ID_MPEG2VIDEO }, /* MXF-GC SMPTE D-10 Mappings */
924 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
925 };
926
927 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
928 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
929 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x0A,0x04,0x01,0x02,0x02,0x01,0x32,0x00,0x00 }, 14, AV_CODEC_ID_H264 }, /* H.264/MPEG-4 AVC Intra Profiles */
930 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
931 };
932
933 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
934 // sound essence container uls
935 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, AV_CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
936 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14, AV_CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
937 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 }, 14, AV_CODEC_ID_PCM_S16LE }, /* D-10 Mapping 50Mbps PAL Extended Template */
938 { { 0x06,0x0E,0x2B,0x34,0x01,0x01,0x01,0xFF,0x4B,0x46,0x41,0x41,0x00,0x0D,0x4D,0x4F }, 14, AV_CODEC_ID_PCM_S16LE }, /* 0001GL00.MXF.A1.mxf_opatom.mxf */
939 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
940 };
941
942 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
943 {
944 int i, j, nb_segments = 0;
945 MXFIndexTableSegment **unsorted_segments;
946 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
947
948 /* count number of segments, allocate arrays and copy unsorted segments */
949 for (i = 0; i < mxf->metadata_sets_count; i++)
950 if (mxf->metadata_sets[i]->type == IndexTableSegment)
951 nb_segments++;
952
953 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
954 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
955 if (!sorted_segments || !unsorted_segments) {
956 av_freep(sorted_segments);
957 av_free(unsorted_segments);
958 return AVERROR(ENOMEM);
959 }
960
961 for (i = j = 0; i < mxf->metadata_sets_count; i++)
962 if (mxf->metadata_sets[i]->type == IndexTableSegment)
963 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
964
965 *nb_sorted_segments = 0;
966
967 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
968 for (i = 0; i < nb_segments; i++) {
969 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
970
971 for (j = 0; j < nb_segments; j++) {
972 MXFIndexTableSegment *s = unsorted_segments[j];
973
974 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
975 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
976 */
977 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
978 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
979 best = j;
980 best_body_sid = s->body_sid;
981 best_index_sid = s->index_sid;
982 best_index_start = s->index_start_position;
983 }
984 }
985
986 /* no suitable entry found -> we're done */
987 if (best == -1)
988 break;
989
990 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
991 last_body_sid = best_body_sid;
992 last_index_sid = best_index_sid;
993 last_index_start = best_index_start;
994 }
995
996 av_free(unsorted_segments);
997
998 return 0;
999 }
1000
1001 /**
1002 * Computes the absolute file offset of the given essence container offset
1003 */
1004 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1005 {
1006 int x;
1007 int64_t offset_in = offset; /* for logging */
1008
1009 for (x = 0; x < mxf->partitions_count; x++) {
1010 MXFPartition *p = &mxf->partitions[x];
1011
1012 if (p->body_sid != body_sid)
1013 continue;
1014
1015 if (offset < p->essence_length || !p->essence_length) {
1016 *offset_out = p->essence_offset + offset;
1017 return 0;
1018 }
1019
1020 offset -= p->essence_length;
1021 }
1022
1023 av_log(mxf->fc, AV_LOG_ERROR,
1024 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1025 offset_in, body_sid);
1026
1027 return AVERROR_INVALIDDATA;
1028 }
1029
1030 /**
1031 * Returns the end position of the essence container with given BodySID, or zero if unknown
1032 */
1033 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1034 {
1035 int x;
1036 int64_t ret = 0;
1037
1038 for (x = 0; x < mxf->partitions_count; x++) {
1039 MXFPartition *p = &mxf->partitions[x];
1040
1041 if (p->body_sid != body_sid)
1042 continue;
1043
1044 if (!p->essence_length)
1045 return 0;
1046
1047 ret = p->essence_offset + p->essence_length;
1048 }
1049
1050 return ret;
1051 }
1052
1053 /* EditUnit -> absolute offset */
1054 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)
1055 {
1056 int i;
1057 int64_t offset_temp = 0;
1058
1059 for (i = 0; i < index_table->nb_segments; i++) {
1060 MXFIndexTableSegment *s = index_table->segments[i];
1061
1062 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1063
1064 if (edit_unit < s->index_start_position + s->index_duration) {
1065 int64_t index = edit_unit - s->index_start_position;
1066
1067 if (s->edit_unit_byte_count)
1068 offset_temp += s->edit_unit_byte_count * index;
1069 else if (s->nb_index_entries) {
1070 if (s->nb_index_entries == 2 * s->index_duration + 1)
1071 index *= 2; /* Avid index */
1072
1073 if (index < 0 || index >= s->nb_index_entries) {
1074 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1075 index_table->index_sid, s->index_start_position);
1076 return AVERROR_INVALIDDATA;
1077 }
1078
1079 offset_temp = s->stream_offset_entries[index];
1080 } else {
1081 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1082 index_table->index_sid, s->index_start_position);
1083 return AVERROR_INVALIDDATA;
1084 }
1085
1086 if (edit_unit_out)
1087 *edit_unit_out = edit_unit;
1088
1089 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1090 } else {
1091 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1092 offset_temp += s->edit_unit_byte_count * s->index_duration;
1093 }
1094 }
1095
1096 if (nag)
1097 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);
1098
1099 return AVERROR_INVALIDDATA;
1100 }
1101
1102 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1103 {
1104 int i, j, x;
1105 int8_t max_temporal_offset = -128;
1106
1107 /* first compute how many entries we have */
1108 for (i = 0; i < index_table->nb_segments; i++) {
1109 MXFIndexTableSegment *s = index_table->segments[i];
1110
1111 if (!s->nb_index_entries) {
1112 index_table->nb_ptses = 0;
1113 return 0; /* no TemporalOffsets */
1114 }
1115
1116 index_table->nb_ptses += s->index_duration;
1117 }
1118
1119 /* paranoid check */
1120 if (index_table->nb_ptses <= 0)
1121 return 0;
1122
1123 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1124 return AVERROR(ENOMEM);
1125
1126 index_table->ptses = av_mallocz(index_table->nb_ptses *
1127 sizeof(int64_t));
1128 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1129 sizeof(AVIndexEntry));
1130 if (!index_table->ptses || !index_table->fake_index) {
1131 av_freep(&index_table->ptses);
1132 return AVERROR(ENOMEM);
1133 }
1134
1135 /* we may have a few bad TemporalOffsets
1136 * make sure the corresponding PTSes don't have the bogus value 0 */
1137 for (x = 0; x < index_table->nb_ptses; x++)
1138 index_table->ptses[x] = AV_NOPTS_VALUE;
1139
1140 /**
1141 * We have this:
1142 *
1143 * x TemporalOffset
1144 * 0: 0
1145 * 1: 1
1146 * 2: 1
1147 * 3: -2
1148 * 4: 1
1149 * 5: 1
1150 * 6: -2
1151 *
1152 * We want to transform it into this:
1153 *
1154 * x DTS PTS
1155 * 0: -1 0
1156 * 1: 0 3
1157 * 2: 1 1
1158 * 3: 2 2
1159 * 4: 3 6
1160 * 5: 4 4
1161 * 6: 5 5
1162 *
1163 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1164 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1165 * The latter makes DTS <= PTS.
1166 */
1167 for (i = x = 0; i < index_table->nb_segments; i++) {
1168 MXFIndexTableSegment *s = index_table->segments[i];
1169 int index_delta = 1;
1170 int n = s->nb_index_entries;
1171
1172 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1173 index_delta = 2; /* Avid index */
1174 /* ignore the last entry - it's the size of the essence container */
1175 n--;
1176 }
1177
1178 for (j = 0; j < n; j += index_delta, x++) {
1179 int offset = s->temporal_offset_entries[j] / index_delta;
1180 int index = x + offset;
1181
1182 if (x >= index_table->nb_ptses) {
1183 av_log(mxf->fc, AV_LOG_ERROR,
1184 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1185 s->nb_index_entries, s->index_duration);
1186 break;
1187 }
1188
1189 index_table->fake_index[x].timestamp = x;
1190 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1191
1192 if (index < 0 || index >= index_table->nb_ptses) {
1193 av_log(mxf->fc, AV_LOG_ERROR,
1194 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1195 x, offset, index);
1196 continue;
1197 }
1198
1199 index_table->ptses[index] = x;
1200 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1201 }
1202 }
1203
1204 index_table->first_dts = -max_temporal_offset;
1205
1206 return 0;
1207 }
1208
1209 /**
1210 * Sorts and collects index table segments into index tables.
1211 * Also computes PTSes if possible.
1212 */
1213 static int mxf_compute_index_tables(MXFContext *mxf)
1214 {
1215 int i, j, k, ret, nb_sorted_segments;
1216 MXFIndexTableSegment **sorted_segments = NULL;
1217
1218 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1219 nb_sorted_segments <= 0) {
1220 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1221 return 0;
1222 }
1223
1224 /* sanity check and count unique BodySIDs/IndexSIDs */
1225 for (i = 0; i < nb_sorted_segments; i++) {
1226 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1227 mxf->nb_index_tables++;
1228 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1229 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1230 ret = AVERROR_INVALIDDATA;
1231 goto finish_decoding_index;
1232 }
1233 }
1234
1235 if (mxf->nb_index_tables > INT_MAX / sizeof(MXFIndexTable) ||
1236 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1237 sizeof(MXFIndexTable)))) {
1238 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1239 ret = AVERROR(ENOMEM);
1240 goto finish_decoding_index;
1241 }
1242
1243 /* distribute sorted segments to index tables */
1244 for (i = j = 0; i < nb_sorted_segments; i++) {
1245 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1246 /* next IndexSID */
1247 j++;
1248 }
1249
1250 mxf->index_tables[j].nb_segments++;
1251 }
1252
1253 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1254 MXFIndexTable *t = &mxf->index_tables[j];
1255
1256 if (t->nb_segments >
1257 (INT_MAX / sizeof(MXFIndexTableSegment *)) ||
1258 !(t->segments = av_mallocz(t->nb_segments *
1259 sizeof(MXFIndexTableSegment*)))) {
1260 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1261 " pointer array\n");
1262 ret = AVERROR(ENOMEM);
1263 goto finish_decoding_index;
1264 }
1265
1266 if (sorted_segments[i]->index_start_position)
1267 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1268 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1269
1270 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1271 t->index_sid = sorted_segments[i]->index_sid;
1272 t->body_sid = sorted_segments[i]->body_sid;
1273
1274 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1275 goto finish_decoding_index;
1276
1277 /* fix zero IndexDurations */
1278 for (k = 0; k < t->nb_segments; k++) {
1279 if (t->segments[k]->index_duration)
1280 continue;
1281
1282 if (t->nb_segments > 1)
1283 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1284 t->index_sid, k);
1285
1286 if (mxf->fc->nb_streams <= 0) {
1287 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1288 break;
1289 }
1290
1291 /* assume the first stream's duration is reasonable
1292 * leave index_duration = 0 on further segments in case we have any (unlikely)
1293 */
1294 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1295 break;
1296 }
1297 }
1298
1299 ret = 0;
1300 finish_decoding_index:
1301 av_free(sorted_segments);
1302 return ret;
1303 }
1304
1305 static int mxf_is_intra_only(MXFDescriptor *d)
1306 {
1307 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1308 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1309 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1310 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1311 }
1312
1313 static int mxf_parse_structural_metadata(MXFContext *mxf)
1314 {
1315 MXFPackage *material_package = NULL;
1316 MXFPackage *temp_package = NULL;
1317 int i, j, k, ret;
1318
1319 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1320 /* TODO: handle multiple material packages (OP3x) */
1321 for (i = 0; i < mxf->packages_count; i++) {
1322 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1323 if (material_package) break;
1324 }
1325 if (!material_package) {
1326 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1327 return AVERROR_INVALIDDATA;
1328 }
1329
1330 for (i = 0; i < material_package->tracks_count; i++) {
1331 MXFPackage *source_package = NULL;
1332 MXFTrack *material_track = NULL;
1333 MXFTrack *source_track = NULL;
1334 MXFTrack *temp_track = NULL;
1335 MXFDescriptor *descriptor = NULL;
1336 MXFStructuralComponent *component = NULL;
1337 UID *essence_container_ul = NULL;
1338 const MXFCodecUL *codec_ul = NULL;
1339 const MXFCodecUL *container_ul = NULL;
1340 const MXFCodecUL *pix_fmt_ul = NULL;
1341 AVStream *st;
1342
1343 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1344 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1345 continue;
1346 }
1347
1348 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1349 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1350 continue;
1351 }
1352
1353 /* TODO: handle multiple source clips */
1354 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1355 /* TODO: handle timecode component */
1356 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1357 if (!component)
1358 continue;
1359
1360 for (k = 0; k < mxf->packages_count; k++) {
1361 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1362 if (!temp_package)
1363 continue;
1364 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1365 source_package = temp_package;
1366 break;
1367 }
1368 }
1369 if (!source_package) {
1370 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1371 break;
1372 }
1373 for (k = 0; k < source_package->tracks_count; k++) {
1374 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1375 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1376 ret = AVERROR_INVALIDDATA;
1377 goto fail_and_free;
1378 }
1379 if (temp_track->track_id == component->source_track_id) {
1380 source_track = temp_track;
1381 break;
1382 }
1383 }
1384 if (!source_track) {
1385 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1386 break;
1387 }
1388 }
1389 if (!source_track || !component)
1390 continue;
1391
1392 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1393 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1394 ret = AVERROR_INVALIDDATA;
1395 goto fail_and_free;
1396 }
1397
1398 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1399 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1400 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1401 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1402 continue;
1403 }
1404
1405 st = avformat_new_stream(mxf->fc, NULL);
1406 if (!st) {
1407 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1408 ret = AVERROR(ENOMEM);
1409 goto fail_and_free;
1410 }
1411 st->id = source_track->track_id;
1412 st->priv_data = source_track;
1413 st->duration = component->duration;
1414 if (st->duration == -1)
1415 st->duration = AV_NOPTS_VALUE;
1416 st->start_time = component->start_position;
1417 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1418
1419 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1420 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1421 st->codec->codec_type = codec_ul->id;
1422
1423 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1424 if (source_package->descriptor) {
1425 if (source_package->descriptor->type == MultipleDescriptor) {
1426 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1427 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1428
1429 if (!sub_descriptor) {
1430 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1431 continue;
1432 }
1433 if (sub_descriptor->linked_track_id == source_track->track_id) {
1434 descriptor = sub_descriptor;
1435 break;
1436 }
1437 }
1438 } else if (source_package->descriptor->type == Descriptor)
1439 descriptor = source_package->descriptor;
1440 }
1441 if (!descriptor) {
1442 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1443 continue;
1444 }
1445 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1446 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1447 essence_container_ul = &descriptor->essence_container_ul;
1448 /* HACK: replacing the original key with mxf_encrypted_essence_container
1449 * is not allowed according to s429-6, try to find correct information anyway */
1450 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1451 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1452 for (k = 0; k < mxf->metadata_sets_count; k++) {
1453 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1454 if (metadata->type == CryptoContext) {
1455 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1456 break;
1457 }
1458 }
1459 }
1460
1461 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1462 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1463 st->codec->codec_id = codec_ul->id;
1464 if (descriptor->extradata) {
1465 st->codec->extradata = descriptor->extradata;
1466 st->codec->extradata_size = descriptor->extradata_size;
1467 }
1468 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1469 source_track->intra_only = mxf_is_intra_only(descriptor);
1470 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1471 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1472 st->codec->codec_id = container_ul->id;
1473 st->codec->width = descriptor->width;
1474 /* Field height, not frame height */
1475 st->codec->height = descriptor->height;
1476 switch (descriptor->frame_layout) {
1477 case SegmentedFrame:
1478 /* This one is a weird layout I don't fully understand. */
1479 av_log(mxf->fc, AV_LOG_INFO,
1480 "SegmentedFrame layout isn't currently supported\n");
1481 break;
1482 case FullFrame:
1483 break;
1484 case OneField:
1485 /* Every other line is stored and needs to be duplicated. */
1486 av_log(mxf->fc, AV_LOG_INFO,
1487 "OneField frame layout isn't currently supported\n");
1488 break;
1489 /* The correct thing to do here is fall through, but by
1490 * breaking we might be able to decode some streams at half
1491 * the vertical resolution, rather than not al all.
1492 * It's also for compatibility with the old behavior. */
1493 case SeparateFields:
1494 case MixedFields:
1495 /* Turn field height into frame height. */
1496 st->codec->height *= 2;
1497 default:
1498 av_log(mxf->fc, AV_LOG_INFO,
1499 "Unknown frame layout type: %d\n",
1500 descriptor->frame_layout);
1501 }
1502 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1503 st->codec->pix_fmt = descriptor->pix_fmt;
1504 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1505 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1506 &descriptor->essence_codec_ul);
1507 st->codec->pix_fmt = pix_fmt_ul->id;
1508 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1509 /* support files created before RP224v10 by defaulting to UYVY422
1510 if subsampling is 4:2:2 and component depth is 8-bit */
1511 if (descriptor->horiz_subsampling == 2 &&
1512 descriptor->vert_subsampling == 1 &&
1513 descriptor->component_depth == 8) {
1514 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1515 }
1516 }
1517 }
1518 }
1519 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1520 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1521 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1522 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1523 st->codec->codec_id = container_ul->id;
1524 st->codec->channels = descriptor->channels;
1525 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1526
1527 if (descriptor->sample_rate.den > 0)
1528 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1529
1530 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1531 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1532 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1533 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1534 else if (descriptor->bits_per_sample == 32)
1535 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1536 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1537 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1538 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1539 else if (descriptor->bits_per_sample == 32)
1540 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1541 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1542 st->need_parsing = AVSTREAM_PARSE_FULL;
1543 }
1544 }
1545 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1546 /* TODO: decode timestamps */
1547 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1548 }
1549 }
1550
1551 ret = 0;
1552 fail_and_free:
1553 return ret;
1554 }
1555
1556 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1557 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1558 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1559 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1560 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1561 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1562 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1563 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1564 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1565 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1566 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1567 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1568 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1569 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1570 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1571 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1572 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1573 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1574 { { 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 */
1575 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1576 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1577 { { 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 */
1578 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1579 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1580 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1584 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1585 };
1586
1587 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1588 {
1589 AVIOContext *pb = mxf->fc->pb;
1590 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1591 uint64_t klv_end = avio_tell(pb) + klv->length;
1592
1593 if (!ctx)
1594 return AVERROR(ENOMEM);
1595 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1596 int ret;
1597 int tag = avio_rb16(pb);
1598 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1599 uint64_t next = avio_tell(pb) + size;
1600 UID uid = {0};
1601
1602 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1603 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1604 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1605 continue;
1606 }
1607 if (tag > 0x7FFF) { /* dynamic tag */
1608 int i;
1609 for (i = 0; i < mxf->local_tags_count; i++) {
1610 int local_tag = AV_RB16(mxf->local_tags+i*18);
1611 if (local_tag == tag) {
1612 memcpy(uid, mxf->local_tags+i*18+2, 16);
1613 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1614 PRINT_KEY(mxf->fc, "uid", uid);
1615 }
1616 }
1617 }
1618 if (ctx_size && tag == 0x3C0A)
1619 avio_read(pb, ctx->uid, 16);
1620 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1621 return ret;
1622
1623 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1624 * it extending past the end of the KLV though (zzuf5.mxf). */
1625 if (avio_tell(pb) > klv_end) {
1626 av_log(mxf->fc, AV_LOG_ERROR,
1627 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1628 tag, klv->offset);
1629 return AVERROR_INVALIDDATA;
1630 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1631 avio_seek(pb, next, SEEK_SET);
1632 }
1633 if (ctx_size) ctx->type = type;
1634 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1635 }
1636
1637 /**
1638 * Seeks to the previous partition, if possible
1639 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1640 */
1641 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1642 {
1643 AVIOContext *pb = mxf->fc->pb;
1644
1645 if (!mxf->current_partition ||
1646 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1647 return 0; /* we've parsed all partitions */
1648
1649 /* seek to previous partition */
1650 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1651 mxf->current_partition = NULL;
1652
1653 av_dlog(mxf->fc, "seeking to previous partition\n");
1654
1655 return 1;
1656 }
1657
1658 /**
1659 * Called when essence is encountered
1660 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1661 */
1662 static int mxf_parse_handle_essence(MXFContext *mxf)
1663 {
1664 AVIOContext *pb = mxf->fc->pb;
1665 int64_t ret;
1666
1667 if (mxf->parsing_backward) {
1668 return mxf_seek_to_previous_partition(mxf);
1669 } else {
1670 if (!mxf->footer_partition) {
1671 av_dlog(mxf->fc, "no footer\n");
1672 return 0;
1673 }
1674
1675 av_dlog(mxf->fc, "seeking to footer\n");
1676
1677 /* remember where we were so we don't end up seeking further back than this */
1678 mxf->last_forward_tell = avio_tell(pb);
1679
1680 if (!pb->seekable) {
1681 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1682 return -1;
1683 }
1684
1685 /* seek to footer partition and parse backward */
1686 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1687 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1688 mxf->run_in + mxf->footer_partition, ret);
1689 return ret;
1690 }
1691
1692 mxf->current_partition = NULL;
1693 mxf->parsing_backward = 1;
1694 }
1695
1696 return 1;
1697 }
1698
1699 /**
1700 * Called when the next partition or EOF is encountered
1701 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1702 */
1703 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1704 {
1705 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1706 }
1707
1708 /**
1709 * Figure out the proper offset and length of the essence container
1710 * in each partition
1711 */
1712 static void mxf_compute_essence_containers(MXFContext *mxf)
1713 {
1714 int x;
1715
1716 /* everything is already correct */
1717 if (mxf->op == OPAtom)
1718 return;
1719
1720 for (x = 0; x < mxf->partitions_count; x++) {
1721 MXFPartition *p = &mxf->partitions[x];
1722
1723 if (!p->body_sid)
1724 continue; /* BodySID == 0 -> no essence */
1725
1726 if (x >= mxf->partitions_count - 1)
1727 break; /* last partition - can't compute length (and we don't need to) */
1728
1729 /* essence container spans to the next partition */
1730 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1731
1732 if (p->essence_length < 0) {
1733 /* next ThisPartition < essence_offset */
1734 p->essence_length = 0;
1735 av_log(mxf->fc, AV_LOG_ERROR,
1736 "partition %i: bad ThisPartition = %"PRIX64"\n",
1737 x+1, mxf->partitions[x+1].this_partition);
1738 }
1739 }
1740 }
1741
1742 static int64_t round_to_kag(int64_t position, int kag_size)
1743 {
1744 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1745 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1746 int64_t ret = (position / kag_size) * kag_size;
1747 return ret == position ? ret : ret + kag_size;
1748 }
1749
1750 static inline void compute_partition_essence_offset(AVFormatContext *s,
1751 MXFContext *mxf,
1752 KLVPacket *klv)
1753 {
1754 MXFPartition *cur_part = mxf->current_partition;
1755 /* for OP1a we compute essence_offset
1756 * for OPAtom we point essence_offset after the KL
1757 * (usually op1a_essence_offset + 20 or 25)
1758 * TODO: for OP1a we could eliminate this entire if statement, always
1759 * stopping parsing at op1a_essence_offset
1760 * for OPAtom we still need the actual essence_offset though
1761 * (the KL's length can vary)
1762 */
1763 int64_t op1a_essence_offset =
1764 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1765 cur_part->kag_size) +
1766 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1767 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1768
1769 if (mxf->op == OPAtom) {
1770 /* point essence_offset to the actual data
1771 * OPAtom has all the essence in one big KLV
1772 */
1773 cur_part->essence_offset = avio_tell(s->pb);
1774 cur_part->essence_length = klv->length;
1775 } else {
1776 /* NOTE: op1a_essence_offset may be less than to klv.offset
1777 * (C0023S01.mxf) */
1778 cur_part->essence_offset = op1a_essence_offset;
1779 }
1780 }
1781
1782 static int is_pcm(enum AVCodecID codec_id)
1783 {
1784 /* we only care about "normal" PCM codecs until we get samples */
1785 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1786 }
1787
1788 /**
1789 * Deal with the case where for some audio atoms EditUnitByteCount is
1790 * very small (2, 4..). In those cases we should read more than one
1791 * sample per call to mxf_read_packet().
1792 */
1793 static void mxf_handle_small_eubc(AVFormatContext *s)
1794 {
1795 MXFContext *mxf = s->priv_data;
1796
1797 /* assuming non-OPAtom == frame wrapped
1798 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1799 if (mxf->op != OPAtom)
1800 return;
1801
1802 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1803 if (s->nb_streams != 1 ||
1804 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1805 !is_pcm(s->streams[0]->codec->codec_id) ||
1806 mxf->nb_index_tables != 1 ||
1807 mxf->index_tables[0].nb_segments != 1 ||
1808 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1809 return;
1810
1811 /* arbitrarily default to 48 kHz PAL audio frame size */
1812 /* TODO: We could compute this from the ratio between the audio
1813 * and video edit rates for 48 kHz NTSC we could use the
1814 * 1802-1802-1802-1802-1801 pattern. */
1815 mxf->edit_units_per_packet = 1920;
1816 }
1817
1818 static int mxf_read_header(AVFormatContext *s)
1819 {
1820 MXFContext *mxf = s->priv_data;
1821 KLVPacket klv;
1822 int64_t essence_offset = 0;
1823 int ret;
1824
1825 mxf->last_forward_tell = INT64_MAX;
1826 mxf->edit_units_per_packet = 1;
1827
1828 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1829 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1830 return AVERROR_INVALIDDATA;
1831 }
1832 avio_seek(s->pb, -14, SEEK_CUR);
1833 mxf->fc = s;
1834 mxf->run_in = avio_tell(s->pb);
1835
1836 while (!s->pb->eof_reached) {
1837 const MXFMetadataReadTableEntry *metadata;
1838
1839 if (klv_read_packet(&klv, s->pb) < 0) {
1840 /* EOF - seek to previous partition or stop */
1841 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1842 break;
1843 else
1844 continue;
1845 }
1846
1847 PRINT_KEY(s, "read header", klv.key);
1848 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1849 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1850 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1851 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1852 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1853
1854 if (!mxf->current_partition) {
1855 av_log(mxf->fc, AV_LOG_ERROR,
1856 "found essence prior to first PartitionPack\n");
1857 return AVERROR_INVALIDDATA;
1858 }
1859
1860 if (!mxf->current_partition->essence_offset) {
1861 compute_partition_essence_offset(s, mxf, &klv);
1862 }
1863
1864 if (!essence_offset)
1865 essence_offset = klv.offset;
1866
1867 /* seek to footer, previous partition or stop */
1868 if (mxf_parse_handle_essence(mxf) <= 0)
1869 break;
1870 continue;
1871 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1872 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1873 /* next partition pack - keep going, seek to previous partition or stop */
1874 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1875 break;
1876 else if (mxf->parsing_backward)
1877 continue;
1878 /* we're still parsing forward. proceed to parsing this partition pack */
1879 }
1880
1881 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1882 if (IS_KLV_KEY(klv.key, metadata->key)) {
1883 int res;
1884 if (klv.key[5] == 0x53) {
1885 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1886 } else {
1887 uint64_t next = avio_tell(s->pb) + klv.length;
1888 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1889
1890 /* only seek forward, else this can loop for a long time */
1891 if (avio_tell(s->pb) > next) {
1892 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1893 klv.offset);
1894 return AVERROR_INVALIDDATA;
1895 }
1896
1897 avio_seek(s->pb, next, SEEK_SET);
1898 }
1899 if (res < 0) {
1900 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1901 return res;
1902 }
1903 break;
1904 }
1905 }
1906 if (!metadata->read)
1907 avio_skip(s->pb, klv.length);
1908 }
1909 /* FIXME avoid seek */
1910 if (!essence_offset) {
1911 av_log(s, AV_LOG_ERROR, "no essence\n");
1912 return AVERROR_INVALIDDATA;
1913 }
1914 avio_seek(s->pb, essence_offset, SEEK_SET);
1915
1916 mxf_compute_essence_containers(mxf);
1917
1918 /* we need to do this before computing the index tables
1919 * to be able to fill in zero IndexDurations with st->duration */
1920 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1921 return ret;
1922
1923 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1924 return ret;
1925
1926 if (mxf->nb_index_tables > 1) {
1927 /* TODO: look up which IndexSID to use via EssenceContainerData */
1928 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1929 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1930 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1931 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1932 return AVERROR_INVALIDDATA;
1933 }
1934
1935 mxf_handle_small_eubc(s);
1936
1937 return 0;
1938 }
1939
1940 /**
1941 * Sets mxf->current_edit_unit based on what offset we're currently at.
1942 * @return next_ofs if OK, <0 on error
1943 */
1944 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1945 {
1946 int64_t last_ofs = -1, next_ofs = -1;
1947 MXFIndexTable *t = &mxf->index_tables[0];
1948
1949 /* this is called from the OP1a demuxing logic, which means there
1950 * may be no index tables */
1951 if (mxf->nb_index_tables <= 0)
1952 return -1;
1953
1954 /* find mxf->current_edit_unit so that the next edit unit starts ahead
1955 * of current_offset */
1956 while (mxf->current_edit_unit >= 0) {
1957 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
1958 NULL, &next_ofs, 0) < 0)
1959 return -1;
1960
1961 if (next_ofs <= last_ofs) {
1962 /* large next_ofs didn't change or current_edit_unit wrapped
1963 * around this fixes the infinite loop on zzuf3.mxf */
1964 av_log(mxf->fc, AV_LOG_ERROR,
1965 "next_ofs didn't change. not deriving packet timestamps\n");
1966 return -1;
1967 }
1968
1969 if (next_ofs > current_offset)
1970 break;
1971
1972 last_ofs = next_ofs;
1973 mxf->current_edit_unit++;
1974 }
1975
1976 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
1977 * may lack IndexEntryArrays */
1978 if (mxf->current_edit_unit < 0)
1979 return -1;
1980
1981 return next_ofs;
1982 }
1983
1984 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1985 {
1986 KLVPacket klv;
1987 MXFContext *mxf = s->priv_data;
1988
1989 while (!s->pb->eof_reached) {
1990 if (klv_read_packet(&klv, s->pb) < 0)
1991 return -1;
1992 PRINT_KEY(s, "read packet", klv.key);
1993 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1994 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1995 int res = mxf_decrypt_triplet(s, pkt, &klv);
1996 if (res < 0) {
1997 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
1998 return -1;
1999 }
2000 return 0;
2001 }
2002 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2003 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2004 int index = mxf_get_stream_index(s, &klv);
2005 int64_t next_ofs, next_klv;
2006 AVStream *st;
2007 MXFTrack *track;
2008
2009 if (index < 0) {
2010 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2011 goto skip;
2012 }
2013
2014 st = s->streams[index];
2015 track = st->priv_data;
2016
2017 if (s->streams[index]->discard == AVDISCARD_ALL)
2018 goto skip;
2019
2020 next_klv = avio_tell(s->pb) + klv.length;
2021 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2022
2023 if (next_ofs >= 0 && next_klv > next_ofs) {
2024 /* if this check is hit then it's possible OPAtom was treated
2025 * as OP1a truncate the packet since it's probably very large
2026 * (>2 GiB is common) */
2027 av_log_ask_for_sample(s,
2028 "KLV for edit unit %i extends into next "
2029 "edit unit - OPAtom misinterpreted as "
2030 "OP1a?\n",
2031 mxf->current_edit_unit);
2032 klv.length = next_ofs - avio_tell(s->pb);
2033 }
2034
2035 /* check for 8 channels AES3 element */
2036 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2037 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2038 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2039 return -1;
2040 }
2041 } else {
2042 int ret = av_get_packet(s->pb, pkt, klv.length);
2043 if (ret < 0)
2044 return ret;
2045 }
2046 pkt->stream_index = index;
2047 pkt->pos = klv.offset;
2048
2049 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2050 /* mxf->current_edit_unit good - see if we have an
2051 * index table to derive timestamps from */
2052 MXFIndexTable *t = &mxf->index_tables[0];
2053
2054 if (mxf->nb_index_tables >= 1 &&
2055 mxf->current_edit_unit < t->nb_ptses) {
2056 pkt->dts = mxf->current_edit_unit + t->first_dts;
2057 pkt->pts = t->ptses[mxf->current_edit_unit];
2058 } else if (track->intra_only) {
2059 /* intra-only -> PTS = EditUnit.
2060 * let utils.c figure out DTS since it can be
2061 * < PTS if low_delay = 0 (Sony IMX30) */
2062 pkt->pts = mxf->current_edit_unit;
2063 }
2064 }
2065
2066 /* seek for truncated packets */
2067 avio_seek(s->pb, next_klv, SEEK_SET);
2068
2069 return 0;
2070 } else
2071 skip:
2072 avio_skip(s->pb, klv.length);
2073 }
2074 return AVERROR_EOF;
2075 }
2076
2077 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2078 {
2079 MXFContext *mxf = s->priv_data;
2080 int ret, size;
2081 int64_t ret64, pos, next_pos;
2082 AVStream *st;
2083 MXFIndexTable *t;
2084 int edit_units;
2085
2086 if (mxf->op != OPAtom)
2087 return mxf_read_packet_old(s, pkt);
2088
2089 /* OPAtom - clip wrapped demuxing */
2090 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2091 st = s->streams[0];
2092 t = &mxf->index_tables[0];
2093
2094 if (mxf->current_edit_unit >= st->duration)
2095 return AVERROR_EOF;
2096
2097 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2098
2099 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2100 return ret;
2101
2102 /* compute size by finding the next edit unit or the end of the essence container
2103 * not pretty, but it works */
2104 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2105 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2106 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2107 return AVERROR_INVALIDDATA;
2108 }
2109
2110 if ((size = next_pos - pos) <= 0) {
2111 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2112 return AVERROR_INVALIDDATA;
2113 }
2114
2115 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2116 return ret64;
2117
2118 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2119 return ret < 0 ? ret : AVERROR_EOF;
2120
2121 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2122 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2123 pkt->dts = mxf->current_edit_unit + t->first_dts;
2124 pkt->pts = t->ptses[mxf->current_edit_unit];
2125 }
2126
2127 pkt->stream_index = 0;
2128 mxf->current_edit_unit += edit_units;
2129
2130 return 0;
2131 }
2132
2133
2134 static int mxf_read_close(AVFormatContext *s)
2135 {
2136 MXFContext *mxf = s->priv_data;
2137 MXFIndexTableSegment *seg;
2138 int i;
2139
2140 av_freep(&mxf->packages_refs);
2141
2142 for (i = 0; i < s->nb_streams; i++)
2143 s->streams[i]->priv_data = NULL;
2144
2145 for (i = 0; i < mxf->metadata_sets_count; i++) {
2146 switch (mxf->metadata_sets[i]->type) {
2147 case MultipleDescriptor:
2148 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2149 break;
2150 case Sequence:
2151 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2152 break;
2153 case SourcePackage:
2154 case MaterialPackage:
2155 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2156 break;
2157 case IndexTableSegment:
2158 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2159 av_freep(&seg->temporal_offset_entries);
2160 av_freep(&seg->flag_entries);
2161 av_freep(&seg->stream_offset_entries);
2162 break;
2163 default:
2164 break;
2165 }
2166 av_freep(&mxf->metadata_sets[i]);
2167 }
2168 av_freep(&mxf->partitions);
2169 av_freep(&mxf->metadata_sets);
2170 av_freep(&mxf->aesc);
2171 av_freep(&mxf->local_tags);
2172
2173 for (i = 0; i < mxf->nb_index_tables; i++) {
2174 av_freep(&mxf->index_tables[i].segments);
2175 av_freep(&mxf->index_tables[i].ptses);
2176 av_freep(&mxf->index_tables[i].fake_index);
2177 }
2178 av_freep(&mxf->index_tables);
2179
2180 return 0;
2181 }
2182
2183 static int mxf_probe(AVProbeData *p) {
2184 uint8_t *bufp = p->buf;
2185 uint8_t *end = p->buf + p->buf_size;
2186
2187 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2188 return 0;
2189
2190 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2191 end -= sizeof(mxf_header_partition_pack_key);
2192 for (; bufp < end; bufp++) {
2193 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2194 return AVPROBE_SCORE_MAX;
2195 }
2196 return 0;
2197 }
2198
2199 /* rudimentary byte seek */
2200 /* XXX: use MXF Index */
2201 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2202 {
2203 AVStream *st = s->streams[stream_index];
2204 int64_t seconds;
2205 MXFContext* mxf = s->priv_data;
2206 int64_t seekpos;
2207 int ret;
2208 MXFIndexTable *t;
2209
2210 if (mxf->index_tables <= 0) {
2211 if (!s->bit_rate)
2212 return AVERROR_INVALIDDATA;
2213 if (sample_time < 0)
2214 sample_time = 0;
2215 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2216
2217 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2218 return ret;
2219 ff_update_cur_dts(s, st, sample_time);
2220 } else {
2221 t = &mxf->index_tables[0];
2222
2223 /* clamp above zero, else ff_index_search_timestamp() returns negative
2224 * this also means we allow seeking before the start */
2225 sample_time = FFMAX(sample_time, 0);
2226
2227 if (t->fake_index) {
2228 /* behave as if we have a proper index */
2229 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2230 return sample_time;
2231 } else {
2232 /* no IndexEntryArray (one or more CBR segments)
2233 * make sure we don't seek past the end */
2234 sample_time = FFMIN(sample_time, st->duration - 1);
2235 }
2236
2237 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2238 return ret;
2239
2240 ff_update_cur_dts(s, st, sample_time);
2241 mxf->current_edit_unit = sample_time;
2242 avio_seek(s->pb, seekpos, SEEK_SET);
2243 }
2244 return 0;
2245 }
2246
2247 AVInputFormat ff_mxf_demuxer = {
2248 .name = "mxf",
2249 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2250 .priv_data_size = sizeof(MXFContext),
2251 .read_probe = mxf_probe,
2252 .read_header = mxf_read_header,
2253 .read_packet = mxf_read_packet,
2254 .read_close = mxf_read_close,
2255 .read_seek = mxf_read_seek,
2256 };