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Merge remote-tracking branch 'libav/master'
[FFMpeg-mirror/mplayer-patches.git] / libavformat / mxfdec.c
blob18f7b26fa170cf21e5792777b2e7600a2cf23fbc
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_aes_alloc();
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 if (!nb_segments)
954 return AVERROR_INVALIDDATA;
955
956 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
957 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
958 if (!*sorted_segments || !unsorted_segments) {
959 av_freep(sorted_segments);
960 av_free(unsorted_segments);
961 return AVERROR(ENOMEM);
962 }
963
964 for (i = j = 0; i < mxf->metadata_sets_count; i++)
965 if (mxf->metadata_sets[i]->type == IndexTableSegment)
966 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
967
968 *nb_sorted_segments = 0;
969
970 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
971 for (i = 0; i < nb_segments; i++) {
972 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
973
974 for (j = 0; j < nb_segments; j++) {
975 MXFIndexTableSegment *s = unsorted_segments[j];
976
977 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
978 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
979 */
980 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
981 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start)) {
982 best = j;
983 best_body_sid = s->body_sid;
984 best_index_sid = s->index_sid;
985 best_index_start = s->index_start_position;
986 }
987 }
988
989 /* no suitable entry found -> we're done */
990 if (best == -1)
991 break;
992
993 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
994 last_body_sid = best_body_sid;
995 last_index_sid = best_index_sid;
996 last_index_start = best_index_start;
997 }
998
999 av_free(unsorted_segments);
1000
1001 return 0;
1002 }
1003
1004 /**
1005 * Computes the absolute file offset of the given essence container offset
1006 */
1007 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1008 {
1009 int x;
1010 int64_t offset_in = offset; /* for logging */
1011
1012 for (x = 0; x < mxf->partitions_count; x++) {
1013 MXFPartition *p = &mxf->partitions[x];
1014
1015 if (p->body_sid != body_sid)
1016 continue;
1017
1018 if (offset < p->essence_length || !p->essence_length) {
1019 *offset_out = p->essence_offset + offset;
1020 return 0;
1021 }
1022
1023 offset -= p->essence_length;
1024 }
1025
1026 av_log(mxf->fc, AV_LOG_ERROR,
1027 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1028 offset_in, body_sid);
1029
1030 return AVERROR_INVALIDDATA;
1031 }
1032
1033 /**
1034 * Returns the end position of the essence container with given BodySID, or zero if unknown
1035 */
1036 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1037 {
1038 int x;
1039 int64_t ret = 0;
1040
1041 for (x = 0; x < mxf->partitions_count; x++) {
1042 MXFPartition *p = &mxf->partitions[x];
1043
1044 if (p->body_sid != body_sid)
1045 continue;
1046
1047 if (!p->essence_length)
1048 return 0;
1049
1050 ret = p->essence_offset + p->essence_length;
1051 }
1052
1053 return ret;
1054 }
1055
1056 /* EditUnit -> absolute offset */
1057 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)
1058 {
1059 int i;
1060 int64_t offset_temp = 0;
1061
1062 for (i = 0; i < index_table->nb_segments; i++) {
1063 MXFIndexTableSegment *s = index_table->segments[i];
1064
1065 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1066
1067 if (edit_unit < s->index_start_position + s->index_duration) {
1068 int64_t index = edit_unit - s->index_start_position;
1069
1070 if (s->edit_unit_byte_count)
1071 offset_temp += s->edit_unit_byte_count * index;
1072 else if (s->nb_index_entries) {
1073 if (s->nb_index_entries == 2 * s->index_duration + 1)
1074 index *= 2; /* Avid index */
1075
1076 if (index < 0 || index >= s->nb_index_entries) {
1077 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1078 index_table->index_sid, s->index_start_position);
1079 return AVERROR_INVALIDDATA;
1080 }
1081
1082 offset_temp = s->stream_offset_entries[index];
1083 } else {
1084 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1085 index_table->index_sid, s->index_start_position);
1086 return AVERROR_INVALIDDATA;
1087 }
1088
1089 if (edit_unit_out)
1090 *edit_unit_out = edit_unit;
1091
1092 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1093 } else {
1094 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1095 offset_temp += s->edit_unit_byte_count * s->index_duration;
1096 }
1097 }
1098
1099 if (nag)
1100 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);
1101
1102 return AVERROR_INVALIDDATA;
1103 }
1104
1105 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1106 {
1107 int i, j, x;
1108 int8_t max_temporal_offset = -128;
1109
1110 /* first compute how many entries we have */
1111 for (i = 0; i < index_table->nb_segments; i++) {
1112 MXFIndexTableSegment *s = index_table->segments[i];
1113
1114 if (!s->nb_index_entries) {
1115 index_table->nb_ptses = 0;
1116 return 0; /* no TemporalOffsets */
1117 }
1118
1119 index_table->nb_ptses += s->index_duration;
1120 }
1121
1122 /* paranoid check */
1123 if (index_table->nb_ptses <= 0)
1124 return 0;
1125
1126 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1127 return AVERROR(ENOMEM);
1128
1129 index_table->ptses = av_mallocz(index_table->nb_ptses *
1130 sizeof(int64_t));
1131 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1132 sizeof(AVIndexEntry));
1133 if (!index_table->ptses || !index_table->fake_index) {
1134 av_freep(&index_table->ptses);
1135 return AVERROR(ENOMEM);
1136 }
1137
1138 /* we may have a few bad TemporalOffsets
1139 * make sure the corresponding PTSes don't have the bogus value 0 */
1140 for (x = 0; x < index_table->nb_ptses; x++)
1141 index_table->ptses[x] = AV_NOPTS_VALUE;
1142
1143 /**
1144 * We have this:
1145 *
1146 * x TemporalOffset
1147 * 0: 0
1148 * 1: 1
1149 * 2: 1
1150 * 3: -2
1151 * 4: 1
1152 * 5: 1
1153 * 6: -2
1154 *
1155 * We want to transform it into this:
1156 *
1157 * x DTS PTS
1158 * 0: -1 0
1159 * 1: 0 3
1160 * 2: 1 1
1161 * 3: 2 2
1162 * 4: 3 6
1163 * 5: 4 4
1164 * 6: 5 5
1165 *
1166 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1167 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1168 * The latter makes DTS <= PTS.
1169 */
1170 for (i = x = 0; i < index_table->nb_segments; i++) {
1171 MXFIndexTableSegment *s = index_table->segments[i];
1172 int index_delta = 1;
1173 int n = s->nb_index_entries;
1174
1175 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1176 index_delta = 2; /* Avid index */
1177 /* ignore the last entry - it's the size of the essence container */
1178 n--;
1179 }
1180
1181 for (j = 0; j < n; j += index_delta, x++) {
1182 int offset = s->temporal_offset_entries[j] / index_delta;
1183 int index = x + offset;
1184
1185 if (x >= index_table->nb_ptses) {
1186 av_log(mxf->fc, AV_LOG_ERROR,
1187 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1188 s->nb_index_entries, s->index_duration);
1189 break;
1190 }
1191
1192 index_table->fake_index[x].timestamp = x;
1193 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1194
1195 if (index < 0 || index >= index_table->nb_ptses) {
1196 av_log(mxf->fc, AV_LOG_ERROR,
1197 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1198 x, offset, index);
1199 continue;
1200 }
1201
1202 index_table->ptses[index] = x;
1203 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1204 }
1205 }
1206
1207 index_table->first_dts = -max_temporal_offset;
1208
1209 return 0;
1210 }
1211
1212 /**
1213 * Sorts and collects index table segments into index tables.
1214 * Also computes PTSes if possible.
1215 */
1216 static int mxf_compute_index_tables(MXFContext *mxf)
1217 {
1218 int i, j, k, ret, nb_sorted_segments;
1219 MXFIndexTableSegment **sorted_segments = NULL;
1220
1221 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1222 nb_sorted_segments <= 0) {
1223 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1224 return 0;
1225 }
1226
1227 /* sanity check and count unique BodySIDs/IndexSIDs */
1228 for (i = 0; i < nb_sorted_segments; i++) {
1229 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1230 mxf->nb_index_tables++;
1231 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1232 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1233 ret = AVERROR_INVALIDDATA;
1234 goto finish_decoding_index;
1235 }
1236 }
1237
1238 if (mxf->nb_index_tables > INT_MAX / sizeof(MXFIndexTable) ||
1239 !(mxf->index_tables = av_mallocz(mxf->nb_index_tables *
1240 sizeof(MXFIndexTable)))) {
1241 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1242 ret = AVERROR(ENOMEM);
1243 goto finish_decoding_index;
1244 }
1245
1246 /* distribute sorted segments to index tables */
1247 for (i = j = 0; i < nb_sorted_segments; i++) {
1248 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1249 /* next IndexSID */
1250 j++;
1251 }
1252
1253 mxf->index_tables[j].nb_segments++;
1254 }
1255
1256 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1257 MXFIndexTable *t = &mxf->index_tables[j];
1258
1259 if (t->nb_segments >
1260 (INT_MAX / sizeof(MXFIndexTableSegment *)) ||
1261 !(t->segments = av_mallocz(t->nb_segments *
1262 sizeof(MXFIndexTableSegment*)))) {
1263 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1264 " pointer array\n");
1265 ret = AVERROR(ENOMEM);
1266 goto finish_decoding_index;
1267 }
1268
1269 if (sorted_segments[i]->index_start_position)
1270 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1271 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1272
1273 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1274 t->index_sid = sorted_segments[i]->index_sid;
1275 t->body_sid = sorted_segments[i]->body_sid;
1276
1277 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1278 goto finish_decoding_index;
1279
1280 /* fix zero IndexDurations */
1281 for (k = 0; k < t->nb_segments; k++) {
1282 if (t->segments[k]->index_duration)
1283 continue;
1284
1285 if (t->nb_segments > 1)
1286 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1287 t->index_sid, k);
1288
1289 if (mxf->fc->nb_streams <= 0) {
1290 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1291 break;
1292 }
1293
1294 /* assume the first stream's duration is reasonable
1295 * leave index_duration = 0 on further segments in case we have any (unlikely)
1296 */
1297 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1298 break;
1299 }
1300 }
1301
1302 ret = 0;
1303 finish_decoding_index:
1304 av_free(sorted_segments);
1305 return ret;
1306 }
1307
1308 static int mxf_is_intra_only(MXFDescriptor *d)
1309 {
1310 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1311 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1312 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1313 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1314 }
1315
1316 static int mxf_parse_structural_metadata(MXFContext *mxf)
1317 {
1318 MXFPackage *material_package = NULL;
1319 MXFPackage *temp_package = NULL;
1320 int i, j, k, ret;
1321
1322 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1323 /* TODO: handle multiple material packages (OP3x) */
1324 for (i = 0; i < mxf->packages_count; i++) {
1325 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1326 if (material_package) break;
1327 }
1328 if (!material_package) {
1329 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1330 return AVERROR_INVALIDDATA;
1331 }
1332
1333 for (i = 0; i < material_package->tracks_count; i++) {
1334 MXFPackage *source_package = NULL;
1335 MXFTrack *material_track = NULL;
1336 MXFTrack *source_track = NULL;
1337 MXFTrack *temp_track = NULL;
1338 MXFDescriptor *descriptor = NULL;
1339 MXFStructuralComponent *component = NULL;
1340 UID *essence_container_ul = NULL;
1341 const MXFCodecUL *codec_ul = NULL;
1342 const MXFCodecUL *container_ul = NULL;
1343 const MXFCodecUL *pix_fmt_ul = NULL;
1344 AVStream *st;
1345
1346 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1347 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1348 continue;
1349 }
1350
1351 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1352 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1353 continue;
1354 }
1355
1356 /* TODO: handle multiple source clips */
1357 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1358 /* TODO: handle timecode component */
1359 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1360 if (!component)
1361 continue;
1362
1363 for (k = 0; k < mxf->packages_count; k++) {
1364 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1365 if (!temp_package)
1366 continue;
1367 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1368 source_package = temp_package;
1369 break;
1370 }
1371 }
1372 if (!source_package) {
1373 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1374 break;
1375 }
1376 for (k = 0; k < source_package->tracks_count; k++) {
1377 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1378 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1379 ret = AVERROR_INVALIDDATA;
1380 goto fail_and_free;
1381 }
1382 if (temp_track->track_id == component->source_track_id) {
1383 source_track = temp_track;
1384 break;
1385 }
1386 }
1387 if (!source_track) {
1388 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1389 break;
1390 }
1391 }
1392 if (!source_track || !component)
1393 continue;
1394
1395 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1396 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1397 ret = AVERROR_INVALIDDATA;
1398 goto fail_and_free;
1399 }
1400
1401 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1402 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1403 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1404 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1405 continue;
1406 }
1407
1408 st = avformat_new_stream(mxf->fc, NULL);
1409 if (!st) {
1410 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1411 ret = AVERROR(ENOMEM);
1412 goto fail_and_free;
1413 }
1414 st->id = source_track->track_id;
1415 st->priv_data = source_track;
1416 st->duration = component->duration;
1417 if (st->duration == -1)
1418 st->duration = AV_NOPTS_VALUE;
1419 st->start_time = component->start_position;
1420 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1421
1422 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1423 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1424 st->codec->codec_type = codec_ul->id;
1425
1426 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1427 if (source_package->descriptor) {
1428 if (source_package->descriptor->type == MultipleDescriptor) {
1429 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1430 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1431
1432 if (!sub_descriptor) {
1433 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1434 continue;
1435 }
1436 if (sub_descriptor->linked_track_id == source_track->track_id) {
1437 descriptor = sub_descriptor;
1438 break;
1439 }
1440 }
1441 } else if (source_package->descriptor->type == Descriptor)
1442 descriptor = source_package->descriptor;
1443 }
1444 if (!descriptor) {
1445 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1446 continue;
1447 }
1448 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1449 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1450 essence_container_ul = &descriptor->essence_container_ul;
1451 /* HACK: replacing the original key with mxf_encrypted_essence_container
1452 * is not allowed according to s429-6, try to find correct information anyway */
1453 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1454 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1455 for (k = 0; k < mxf->metadata_sets_count; k++) {
1456 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1457 if (metadata->type == CryptoContext) {
1458 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1459 break;
1460 }
1461 }
1462 }
1463
1464 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1465 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1466 st->codec->codec_id = codec_ul->id;
1467 if (descriptor->extradata) {
1468 st->codec->extradata = descriptor->extradata;
1469 st->codec->extradata_size = descriptor->extradata_size;
1470 }
1471 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1472 source_track->intra_only = mxf_is_intra_only(descriptor);
1473 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1474 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1475 st->codec->codec_id = container_ul->id;
1476 st->codec->width = descriptor->width;
1477 /* Field height, not frame height */
1478 st->codec->height = descriptor->height;
1479 switch (descriptor->frame_layout) {
1480 case SegmentedFrame:
1481 /* This one is a weird layout I don't fully understand. */
1482 av_log(mxf->fc, AV_LOG_INFO,
1483 "SegmentedFrame layout isn't currently supported\n");
1484 break;
1485 case FullFrame:
1486 break;
1487 case OneField:
1488 /* Every other line is stored and needs to be duplicated. */
1489 av_log(mxf->fc, AV_LOG_INFO,
1490 "OneField frame layout isn't currently supported\n");
1491 break;
1492 /* The correct thing to do here is fall through, but by
1493 * breaking we might be able to decode some streams at half
1494 * the vertical resolution, rather than not al all.
1495 * It's also for compatibility with the old behavior. */
1496 case SeparateFields:
1497 case MixedFields:
1498 /* Turn field height into frame height. */
1499 st->codec->height *= 2;
1500 default:
1501 av_log(mxf->fc, AV_LOG_INFO,
1502 "Unknown frame layout type: %d\n",
1503 descriptor->frame_layout);
1504 }
1505 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1506 st->codec->pix_fmt = descriptor->pix_fmt;
1507 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1508 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1509 &descriptor->essence_codec_ul);
1510 st->codec->pix_fmt = pix_fmt_ul->id;
1511 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1512 /* support files created before RP224v10 by defaulting to UYVY422
1513 if subsampling is 4:2:2 and component depth is 8-bit */
1514 if (descriptor->horiz_subsampling == 2 &&
1515 descriptor->vert_subsampling == 1 &&
1516 descriptor->component_depth == 8) {
1517 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1518 }
1519 }
1520 }
1521 }
1522 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1523 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1524 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1525 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1526 st->codec->codec_id = container_ul->id;
1527 st->codec->channels = descriptor->channels;
1528 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1529
1530 if (descriptor->sample_rate.den > 0)
1531 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1532
1533 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1534 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1535 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1536 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1537 else if (descriptor->bits_per_sample == 32)
1538 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1539 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1540 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1541 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1542 else if (descriptor->bits_per_sample == 32)
1543 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1544 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1545 st->need_parsing = AVSTREAM_PARSE_FULL;
1546 }
1547 }
1548 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1549 /* TODO: decode timestamps */
1550 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1551 }
1552 }
1553
1554 ret = 0;
1555 fail_and_free:
1556 return ret;
1557 }
1558
1559 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1560 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1561 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1562 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1563 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1564 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1565 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1566 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1567 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1568 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1569 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1570 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1571 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1572 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1573 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1574 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1575 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1576 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1577 { { 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 */
1578 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1579 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1580 { { 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 */
1581 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1582 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1583 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1584 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1585 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1586 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1587 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1588 };
1589
1590 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1591 {
1592 AVIOContext *pb = mxf->fc->pb;
1593 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1594 uint64_t klv_end = avio_tell(pb) + klv->length;
1595
1596 if (!ctx)
1597 return AVERROR(ENOMEM);
1598 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1599 int ret;
1600 int tag = avio_rb16(pb);
1601 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1602 uint64_t next = avio_tell(pb) + size;
1603 UID uid = {0};
1604
1605 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1606 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1607 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1608 continue;
1609 }
1610 if (tag > 0x7FFF) { /* dynamic tag */
1611 int i;
1612 for (i = 0; i < mxf->local_tags_count; i++) {
1613 int local_tag = AV_RB16(mxf->local_tags+i*18);
1614 if (local_tag == tag) {
1615 memcpy(uid, mxf->local_tags+i*18+2, 16);
1616 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1617 PRINT_KEY(mxf->fc, "uid", uid);
1618 }
1619 }
1620 }
1621 if (ctx_size && tag == 0x3C0A)
1622 avio_read(pb, ctx->uid, 16);
1623 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1624 return ret;
1625
1626 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1627 * it extending past the end of the KLV though (zzuf5.mxf). */
1628 if (avio_tell(pb) > klv_end) {
1629 av_log(mxf->fc, AV_LOG_ERROR,
1630 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1631 tag, klv->offset);
1632 return AVERROR_INVALIDDATA;
1633 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1634 avio_seek(pb, next, SEEK_SET);
1635 }
1636 if (ctx_size) ctx->type = type;
1637 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1638 }
1639
1640 /**
1641 * Seeks to the previous partition, if possible
1642 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1643 */
1644 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1645 {
1646 AVIOContext *pb = mxf->fc->pb;
1647
1648 if (!mxf->current_partition ||
1649 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1650 return 0; /* we've parsed all partitions */
1651
1652 /* seek to previous partition */
1653 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1654 mxf->current_partition = NULL;
1655
1656 av_dlog(mxf->fc, "seeking to previous partition\n");
1657
1658 return 1;
1659 }
1660
1661 /**
1662 * Called when essence is encountered
1663 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1664 */
1665 static int mxf_parse_handle_essence(MXFContext *mxf)
1666 {
1667 AVIOContext *pb = mxf->fc->pb;
1668 int64_t ret;
1669
1670 if (mxf->parsing_backward) {
1671 return mxf_seek_to_previous_partition(mxf);
1672 } else {
1673 if (!mxf->footer_partition) {
1674 av_dlog(mxf->fc, "no footer\n");
1675 return 0;
1676 }
1677
1678 av_dlog(mxf->fc, "seeking to footer\n");
1679
1680 /* remember where we were so we don't end up seeking further back than this */
1681 mxf->last_forward_tell = avio_tell(pb);
1682
1683 if (!pb->seekable) {
1684 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1685 return -1;
1686 }
1687
1688 /* seek to footer partition and parse backward */
1689 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1690 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1691 mxf->run_in + mxf->footer_partition, ret);
1692 return ret;
1693 }
1694
1695 mxf->current_partition = NULL;
1696 mxf->parsing_backward = 1;
1697 }
1698
1699 return 1;
1700 }
1701
1702 /**
1703 * Called when the next partition or EOF is encountered
1704 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1705 */
1706 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1707 {
1708 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1709 }
1710
1711 /**
1712 * Figure out the proper offset and length of the essence container
1713 * in each partition
1714 */
1715 static void mxf_compute_essence_containers(MXFContext *mxf)
1716 {
1717 int x;
1718
1719 /* everything is already correct */
1720 if (mxf->op == OPAtom)
1721 return;
1722
1723 for (x = 0; x < mxf->partitions_count; x++) {
1724 MXFPartition *p = &mxf->partitions[x];
1725
1726 if (!p->body_sid)
1727 continue; /* BodySID == 0 -> no essence */
1728
1729 if (x >= mxf->partitions_count - 1)
1730 break; /* last partition - can't compute length (and we don't need to) */
1731
1732 /* essence container spans to the next partition */
1733 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1734
1735 if (p->essence_length < 0) {
1736 /* next ThisPartition < essence_offset */
1737 p->essence_length = 0;
1738 av_log(mxf->fc, AV_LOG_ERROR,
1739 "partition %i: bad ThisPartition = %"PRIX64"\n",
1740 x+1, mxf->partitions[x+1].this_partition);
1741 }
1742 }
1743 }
1744
1745 static int64_t round_to_kag(int64_t position, int kag_size)
1746 {
1747 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1748 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1749 int64_t ret = (position / kag_size) * kag_size;
1750 return ret == position ? ret : ret + kag_size;
1751 }
1752
1753 static inline void compute_partition_essence_offset(AVFormatContext *s,
1754 MXFContext *mxf,
1755 KLVPacket *klv)
1756 {
1757 MXFPartition *cur_part = mxf->current_partition;
1758 /* for OP1a we compute essence_offset
1759 * for OPAtom we point essence_offset after the KL
1760 * (usually op1a_essence_offset + 20 or 25)
1761 * TODO: for OP1a we could eliminate this entire if statement, always
1762 * stopping parsing at op1a_essence_offset
1763 * for OPAtom we still need the actual essence_offset though
1764 * (the KL's length can vary)
1765 */
1766 int64_t op1a_essence_offset =
1767 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1768 cur_part->kag_size) +
1769 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1770 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1771
1772 if (mxf->op == OPAtom) {
1773 /* point essence_offset to the actual data
1774 * OPAtom has all the essence in one big KLV
1775 */
1776 cur_part->essence_offset = avio_tell(s->pb);
1777 cur_part->essence_length = klv->length;
1778 } else {
1779 /* NOTE: op1a_essence_offset may be less than to klv.offset
1780 * (C0023S01.mxf) */
1781 cur_part->essence_offset = op1a_essence_offset;
1782 }
1783 }
1784
1785 static int is_pcm(enum AVCodecID codec_id)
1786 {
1787 /* we only care about "normal" PCM codecs until we get samples */
1788 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1789 }
1790
1791 /**
1792 * Deal with the case where for some audio atoms EditUnitByteCount is
1793 * very small (2, 4..). In those cases we should read more than one
1794 * sample per call to mxf_read_packet().
1795 */
1796 static void mxf_handle_small_eubc(AVFormatContext *s)
1797 {
1798 MXFContext *mxf = s->priv_data;
1799
1800 /* assuming non-OPAtom == frame wrapped
1801 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1802 if (mxf->op != OPAtom)
1803 return;
1804
1805 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1806 if (s->nb_streams != 1 ||
1807 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1808 !is_pcm(s->streams[0]->codec->codec_id) ||
1809 mxf->nb_index_tables != 1 ||
1810 mxf->index_tables[0].nb_segments != 1 ||
1811 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1812 return;
1813
1814 /* arbitrarily default to 48 kHz PAL audio frame size */
1815 /* TODO: We could compute this from the ratio between the audio
1816 * and video edit rates for 48 kHz NTSC we could use the
1817 * 1802-1802-1802-1802-1801 pattern. */
1818 mxf->edit_units_per_packet = 1920;
1819 }
1820
1821 static int mxf_read_header(AVFormatContext *s)
1822 {
1823 MXFContext *mxf = s->priv_data;
1824 KLVPacket klv;
1825 int64_t essence_offset = 0;
1826 int ret;
1827
1828 mxf->last_forward_tell = INT64_MAX;
1829 mxf->edit_units_per_packet = 1;
1830
1831 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1832 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1833 return AVERROR_INVALIDDATA;
1834 }
1835 avio_seek(s->pb, -14, SEEK_CUR);
1836 mxf->fc = s;
1837 mxf->run_in = avio_tell(s->pb);
1838
1839 while (!s->pb->eof_reached) {
1840 const MXFMetadataReadTableEntry *metadata;
1841
1842 if (klv_read_packet(&klv, s->pb) < 0) {
1843 /* EOF - seek to previous partition or stop */
1844 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1845 break;
1846 else
1847 continue;
1848 }
1849
1850 PRINT_KEY(s, "read header", klv.key);
1851 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1852 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1853 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1854 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1855 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1856
1857 if (!mxf->current_partition) {
1858 av_log(mxf->fc, AV_LOG_ERROR,
1859 "found essence prior to first PartitionPack\n");
1860 return AVERROR_INVALIDDATA;
1861 }
1862
1863 if (!mxf->current_partition->essence_offset) {
1864 compute_partition_essence_offset(s, mxf, &klv);
1865 }
1866
1867 if (!essence_offset)
1868 essence_offset = klv.offset;
1869
1870 /* seek to footer, previous partition or stop */
1871 if (mxf_parse_handle_essence(mxf) <= 0)
1872 break;
1873 continue;
1874 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1875 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1876 /* next partition pack - keep going, seek to previous partition or stop */
1877 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1878 break;
1879 else if (mxf->parsing_backward)
1880 continue;
1881 /* we're still parsing forward. proceed to parsing this partition pack */
1882 }
1883
1884 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1885 if (IS_KLV_KEY(klv.key, metadata->key)) {
1886 int res;
1887 if (klv.key[5] == 0x53) {
1888 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1889 } else {
1890 uint64_t next = avio_tell(s->pb) + klv.length;
1891 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1892
1893 /* only seek forward, else this can loop for a long time */
1894 if (avio_tell(s->pb) > next) {
1895 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1896 klv.offset);
1897 return AVERROR_INVALIDDATA;
1898 }
1899
1900 avio_seek(s->pb, next, SEEK_SET);
1901 }
1902 if (res < 0) {
1903 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1904 return res;
1905 }
1906 break;
1907 }
1908 }
1909 if (!metadata->read)
1910 avio_skip(s->pb, klv.length);
1911 }
1912 /* FIXME avoid seek */
1913 if (!essence_offset) {
1914 av_log(s, AV_LOG_ERROR, "no essence\n");
1915 return AVERROR_INVALIDDATA;
1916 }
1917 avio_seek(s->pb, essence_offset, SEEK_SET);
1918
1919 mxf_compute_essence_containers(mxf);
1920
1921 /* we need to do this before computing the index tables
1922 * to be able to fill in zero IndexDurations with st->duration */
1923 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1924 return ret;
1925
1926 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1927 return ret;
1928
1929 if (mxf->nb_index_tables > 1) {
1930 /* TODO: look up which IndexSID to use via EssenceContainerData */
1931 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1932 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1933 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1934 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1935 return AVERROR_INVALIDDATA;
1936 }
1937
1938 mxf_handle_small_eubc(s);
1939
1940 return 0;
1941 }
1942
1943 /**
1944 * Sets mxf->current_edit_unit based on what offset we're currently at.
1945 * @return next_ofs if OK, <0 on error
1946 */
1947 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
1948 {
1949 int64_t last_ofs = -1, next_ofs = -1;
1950 MXFIndexTable *t = &mxf->index_tables[0];
1951
1952 /* this is called from the OP1a demuxing logic, which means there
1953 * may be no index tables */
1954 if (mxf->nb_index_tables <= 0)
1955 return -1;
1956
1957 /* find mxf->current_edit_unit so that the next edit unit starts ahead
1958 * of current_offset */
1959 while (mxf->current_edit_unit >= 0) {
1960 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
1961 NULL, &next_ofs, 0) < 0)
1962 return -1;
1963
1964 if (next_ofs <= last_ofs) {
1965 /* large next_ofs didn't change or current_edit_unit wrapped
1966 * around this fixes the infinite loop on zzuf3.mxf */
1967 av_log(mxf->fc, AV_LOG_ERROR,
1968 "next_ofs didn't change. not deriving packet timestamps\n");
1969 return -1;
1970 }
1971
1972 if (next_ofs > current_offset)
1973 break;
1974
1975 last_ofs = next_ofs;
1976 mxf->current_edit_unit++;
1977 }
1978
1979 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
1980 * may lack IndexEntryArrays */
1981 if (mxf->current_edit_unit < 0)
1982 return -1;
1983
1984 return next_ofs;
1985 }
1986
1987 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
1988 {
1989 KLVPacket klv;
1990 MXFContext *mxf = s->priv_data;
1991
1992 while (!s->pb->eof_reached) {
1993 if (klv_read_packet(&klv, s->pb) < 0)
1994 return -1;
1995 PRINT_KEY(s, "read packet", klv.key);
1996 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1997 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
1998 int res = mxf_decrypt_triplet(s, pkt, &klv);
1999 if (res < 0) {
2000 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2001 return -1;
2002 }
2003 return 0;
2004 }
2005 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2006 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2007 int index = mxf_get_stream_index(s, &klv);
2008 int64_t next_ofs, next_klv;
2009 AVStream *st;
2010 MXFTrack *track;
2011
2012 if (index < 0) {
2013 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2014 goto skip;
2015 }
2016
2017 st = s->streams[index];
2018 track = st->priv_data;
2019
2020 if (s->streams[index]->discard == AVDISCARD_ALL)
2021 goto skip;
2022
2023 next_klv = avio_tell(s->pb) + klv.length;
2024 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2025
2026 if (next_ofs >= 0 && next_klv > next_ofs) {
2027 /* if this check is hit then it's possible OPAtom was treated
2028 * as OP1a truncate the packet since it's probably very large
2029 * (>2 GiB is common) */
2030 av_log_ask_for_sample(s,
2031 "KLV for edit unit %i extends into next "
2032 "edit unit - OPAtom misinterpreted as "
2033 "OP1a?\n",
2034 mxf->current_edit_unit);
2035 klv.length = next_ofs - avio_tell(s->pb);
2036 }
2037
2038 /* check for 8 channels AES3 element */
2039 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2040 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2041 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2042 return -1;
2043 }
2044 } else {
2045 int ret = av_get_packet(s->pb, pkt, klv.length);
2046 if (ret < 0)
2047 return ret;
2048 }
2049 pkt->stream_index = index;
2050 pkt->pos = klv.offset;
2051
2052 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2053 /* mxf->current_edit_unit good - see if we have an
2054 * index table to derive timestamps from */
2055 MXFIndexTable *t = &mxf->index_tables[0];
2056
2057 if (mxf->nb_index_tables >= 1 &&
2058 mxf->current_edit_unit < t->nb_ptses) {
2059 pkt->dts = mxf->current_edit_unit + t->first_dts;
2060 pkt->pts = t->ptses[mxf->current_edit_unit];
2061 } else if (track->intra_only) {
2062 /* intra-only -> PTS = EditUnit.
2063 * let utils.c figure out DTS since it can be
2064 * < PTS if low_delay = 0 (Sony IMX30) */
2065 pkt->pts = mxf->current_edit_unit;
2066 }
2067 }
2068
2069 /* seek for truncated packets */
2070 avio_seek(s->pb, next_klv, SEEK_SET);
2071
2072 return 0;
2073 } else
2074 skip:
2075 avio_skip(s->pb, klv.length);
2076 }
2077 return AVERROR_EOF;
2078 }
2079
2080 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2081 {
2082 MXFContext *mxf = s->priv_data;
2083 int ret, size;
2084 int64_t ret64, pos, next_pos;
2085 AVStream *st;
2086 MXFIndexTable *t;
2087 int edit_units;
2088
2089 if (mxf->op != OPAtom)
2090 return mxf_read_packet_old(s, pkt);
2091
2092 /* OPAtom - clip wrapped demuxing */
2093 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2094 st = s->streams[0];
2095 t = &mxf->index_tables[0];
2096
2097 if (mxf->current_edit_unit >= st->duration)
2098 return AVERROR_EOF;
2099
2100 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2101
2102 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2103 return ret;
2104
2105 /* compute size by finding the next edit unit or the end of the essence container
2106 * not pretty, but it works */
2107 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2108 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2109 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2110 return AVERROR_INVALIDDATA;
2111 }
2112
2113 if ((size = next_pos - pos) <= 0) {
2114 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2115 return AVERROR_INVALIDDATA;
2116 }
2117
2118 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2119 return ret64;
2120
2121 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2122 return ret < 0 ? ret : AVERROR_EOF;
2123
2124 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2125 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2126 pkt->dts = mxf->current_edit_unit + t->first_dts;
2127 pkt->pts = t->ptses[mxf->current_edit_unit];
2128 }
2129
2130 pkt->stream_index = 0;
2131 mxf->current_edit_unit += edit_units;
2132
2133 return 0;
2134 }
2135
2136
2137 static int mxf_read_close(AVFormatContext *s)
2138 {
2139 MXFContext *mxf = s->priv_data;
2140 MXFIndexTableSegment *seg;
2141 int i;
2142
2143 av_freep(&mxf->packages_refs);
2144
2145 for (i = 0; i < s->nb_streams; i++)
2146 s->streams[i]->priv_data = NULL;
2147
2148 for (i = 0; i < mxf->metadata_sets_count; i++) {
2149 switch (mxf->metadata_sets[i]->type) {
2150 case MultipleDescriptor:
2151 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2152 break;
2153 case Sequence:
2154 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2155 break;
2156 case SourcePackage:
2157 case MaterialPackage:
2158 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2159 break;
2160 case IndexTableSegment:
2161 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2162 av_freep(&seg->temporal_offset_entries);
2163 av_freep(&seg->flag_entries);
2164 av_freep(&seg->stream_offset_entries);
2165 break;
2166 default:
2167 break;
2168 }
2169 av_freep(&mxf->metadata_sets[i]);
2170 }
2171 av_freep(&mxf->partitions);
2172 av_freep(&mxf->metadata_sets);
2173 av_freep(&mxf->aesc);
2174 av_freep(&mxf->local_tags);
2175
2176 for (i = 0; i < mxf->nb_index_tables; i++) {
2177 av_freep(&mxf->index_tables[i].segments);
2178 av_freep(&mxf->index_tables[i].ptses);
2179 av_freep(&mxf->index_tables[i].fake_index);
2180 }
2181 av_freep(&mxf->index_tables);
2182
2183 return 0;
2184 }
2185
2186 static int mxf_probe(AVProbeData *p) {
2187 uint8_t *bufp = p->buf;
2188 uint8_t *end = p->buf + p->buf_size;
2189
2190 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2191 return 0;
2192
2193 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2194 end -= sizeof(mxf_header_partition_pack_key);
2195 for (; bufp < end; bufp++) {
2196 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2197 return AVPROBE_SCORE_MAX;
2198 }
2199 return 0;
2200 }
2201
2202 /* rudimentary byte seek */
2203 /* XXX: use MXF Index */
2204 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2205 {
2206 AVStream *st = s->streams[stream_index];
2207 int64_t seconds;
2208 MXFContext* mxf = s->priv_data;
2209 int64_t seekpos;
2210 int ret;
2211 MXFIndexTable *t;
2212
2213 if (mxf->nb_index_tables <= 0) {
2214 if (!s->bit_rate)
2215 return AVERROR_INVALIDDATA;
2216 if (sample_time < 0)
2217 sample_time = 0;
2218 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2219
2220 if ((ret = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET)) < 0)
2221 return ret;
2222 ff_update_cur_dts(s, st, sample_time);
2223 } else {
2224 t = &mxf->index_tables[0];
2225
2226 /* clamp above zero, else ff_index_search_timestamp() returns negative
2227 * this also means we allow seeking before the start */
2228 sample_time = FFMAX(sample_time, 0);
2229
2230 if (t->fake_index) {
2231 /* behave as if we have a proper index */
2232 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2233 return sample_time;
2234 } else {
2235 /* no IndexEntryArray (one or more CBR segments)
2236 * make sure we don't seek past the end */
2237 sample_time = FFMIN(sample_time, st->duration - 1);
2238 }
2239
2240 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2241 return ret;
2242
2243 ff_update_cur_dts(s, st, sample_time);
2244 mxf->current_edit_unit = sample_time;
2245 avio_seek(s->pb, seekpos, SEEK_SET);
2246 }
2247 return 0;
2248 }
2249
2250 AVInputFormat ff_mxf_demuxer = {
2251 .name = "mxf",
2252 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2253 .priv_data_size = sizeof(MXFContext),
2254 .read_probe = mxf_probe,
2255 .read_header = mxf_read_header,
2256 .read_packet = mxf_read_packet,
2257 .read_close = mxf_read_close,
2258 .read_seek = mxf_read_seek,
2259 };
A couple of patches to make building with MPlayer easier