mxf: Return meaningful errors
[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 #include <stdint.h>
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 uint64_t sample_count;
126 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
127 } MXFTrack;
128
129 typedef struct {
130 UID uid;
131 enum MXFMetadataSetType type;
132 UID essence_container_ul;
133 UID essence_codec_ul;
134 AVRational sample_rate;
135 AVRational aspect_ratio;
136 int width;
137 int height; /* Field height, not frame height */
138 int frame_layout; /* See MXFFrameLayout enum */
139 #define MXF_TFF 1
140 #define MXF_BFF 2
141 int field_dominance;
142 int channels;
143 int bits_per_sample;
144 unsigned int component_depth;
145 unsigned int horiz_subsampling;
146 unsigned int vert_subsampling;
147 UID *sub_descriptors_refs;
148 int sub_descriptors_count;
149 int linked_track_id;
150 uint8_t *extradata;
151 int extradata_size;
152 enum AVPixelFormat pix_fmt;
153 } MXFDescriptor;
154
155 typedef struct {
156 UID uid;
157 enum MXFMetadataSetType type;
158 int edit_unit_byte_count;
159 int index_sid;
160 int body_sid;
161 AVRational index_edit_rate;
162 uint64_t index_start_position;
163 uint64_t index_duration;
164 int8_t *temporal_offset_entries;
165 int *flag_entries;
166 uint64_t *stream_offset_entries;
167 int nb_index_entries;
168 } MXFIndexTableSegment;
169
170 typedef struct {
171 UID uid;
172 enum MXFMetadataSetType type;
173 UID package_uid;
174 UID *tracks_refs;
175 int tracks_count;
176 MXFDescriptor *descriptor; /* only one */
177 UID descriptor_ref;
178 } MXFPackage;
179
180 typedef struct {
181 UID uid;
182 enum MXFMetadataSetType type;
183 } MXFMetadataSet;
184
185 /* decoded index table */
186 typedef struct {
187 int index_sid;
188 int body_sid;
189 int nb_ptses; /* number of PTSes or total duration of index */
190 int64_t first_dts; /* DTS = EditUnit + first_dts */
191 int64_t *ptses; /* maps EditUnit -> PTS */
192 int nb_segments;
193 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
194 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
195 } MXFIndexTable;
196
197 typedef struct {
198 MXFPartition *partitions;
199 unsigned partitions_count;
200 MXFOP op;
201 UID *packages_refs;
202 int packages_count;
203 MXFMetadataSet **metadata_sets;
204 int metadata_sets_count;
205 AVFormatContext *fc;
206 struct AVAES *aesc;
207 uint8_t *local_tags;
208 int local_tags_count;
209 uint64_t last_partition;
210 uint64_t footer_partition;
211 KLVPacket current_klv_data;
212 int current_klv_index;
213 int run_in;
214 MXFPartition *current_partition;
215 int parsing_backward;
216 int64_t last_forward_tell;
217 int last_forward_partition;
218 int current_edit_unit;
219 int nb_index_tables;
220 MXFIndexTable *index_tables;
221 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
222 } MXFContext;
223
224 enum MXFWrappingScheme {
225 Frame,
226 Clip,
227 };
228
229 /* NOTE: klv_offset is not set (-1) for local keys */
230 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
231
232 typedef struct {
233 const UID key;
234 MXFMetadataReadFunc *read;
235 int ctx_size;
236 enum MXFMetadataSetType type;
237 } MXFMetadataReadTableEntry;
238
239 /* partial keys to match */
240 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
241 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
242 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
243 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
244 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
245 /* complete keys to match */
246 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 };
247 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
248 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
249 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
250 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
251
252 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
253
254 static int64_t klv_decode_ber_length(AVIOContext *pb)
255 {
256 uint64_t size = avio_r8(pb);
257 if (size & 0x80) { /* long form */
258 int bytes_num = size & 0x7f;
259 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
260 if (bytes_num > 8)
261 return AVERROR_INVALIDDATA;
262 size = 0;
263 while (bytes_num--)
264 size = size << 8 | avio_r8(pb);
265 }
266 return size;
267 }
268
269 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
270 {
271 int i, b;
272 for (i = 0; i < size && !pb->eof_reached; i++) {
273 b = avio_r8(pb);
274 if (b == key[0])
275 i = 0;
276 else if (b != key[i])
277 i = -1;
278 }
279 return i == size;
280 }
281
282 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
283 {
284 if (!mxf_read_sync(pb, mxf_klv_key, 4))
285 return AVERROR_INVALIDDATA;
286 klv->offset = avio_tell(pb) - 4;
287 memcpy(klv->key, mxf_klv_key, 4);
288 avio_read(pb, klv->key + 4, 12);
289 klv->length = klv_decode_ber_length(pb);
290 return klv->length == -1 ? -1 : 0;
291 }
292
293 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
294 {
295 int i;
296
297 for (i = 0; i < s->nb_streams; i++) {
298 MXFTrack *track = s->streams[i]->priv_data;
299 /* SMPTE 379M 7.3 */
300 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
301 return i;
302 }
303 /* return 0 if only one stream, for OP Atom files with 0 as track number */
304 return s->nb_streams == 1 ? 0 : -1;
305 }
306
307 /* XXX: use AVBitStreamFilter */
308 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
309 {
310 const uint8_t *buf_ptr, *end_ptr;
311 uint8_t *data_ptr;
312 int i;
313
314 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
315 return AVERROR_INVALIDDATA;
316 length = av_get_packet(pb, pkt, length);
317 if (length < 0)
318 return length;
319 data_ptr = pkt->data;
320 end_ptr = pkt->data + length;
321 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
322 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
323 for (i = 0; i < st->codec->channels; i++) {
324 uint32_t sample = bytestream_get_le32(&buf_ptr);
325 if (st->codec->bits_per_coded_sample == 24)
326 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
327 else
328 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
329 }
330 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
331 }
332 av_shrink_packet(pkt, data_ptr - pkt->data);
333 return 0;
334 }
335
336 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
337 {
338 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
339 MXFContext *mxf = s->priv_data;
340 AVIOContext *pb = s->pb;
341 int64_t end = avio_tell(pb) + klv->length;
342 int64_t size;
343 uint64_t orig_size;
344 uint64_t plaintext_size;
345 uint8_t ivec[16];
346 uint8_t tmpbuf[16];
347 int index;
348
349 if (!mxf->aesc && s->key && s->keylen == 16) {
350 mxf->aesc = av_aes_alloc();
351 if (!mxf->aesc)
352 return AVERROR(ENOMEM);
353 av_aes_init(mxf->aesc, s->key, 128, 1);
354 }
355 // crypto context
356 avio_skip(pb, klv_decode_ber_length(pb));
357 // plaintext offset
358 klv_decode_ber_length(pb);
359 plaintext_size = avio_rb64(pb);
360 // source klv key
361 klv_decode_ber_length(pb);
362 avio_read(pb, klv->key, 16);
363 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
364 return AVERROR_INVALIDDATA;
365 index = mxf_get_stream_index(s, klv);
366 if (index < 0)
367 return AVERROR_INVALIDDATA;
368 // source size
369 klv_decode_ber_length(pb);
370 orig_size = avio_rb64(pb);
371 if (orig_size < plaintext_size)
372 return AVERROR_INVALIDDATA;
373 // enc. code
374 size = klv_decode_ber_length(pb);
375 if (size < 32 || size - 32 < orig_size)
376 return AVERROR_INVALIDDATA;
377 avio_read(pb, ivec, 16);
378 avio_read(pb, tmpbuf, 16);
379 if (mxf->aesc)
380 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
381 if (memcmp(tmpbuf, checkv, 16))
382 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
383 size -= 32;
384 size = av_get_packet(pb, pkt, size);
385 if (size < 0)
386 return size;
387 else if (size < plaintext_size)
388 return AVERROR_INVALIDDATA;
389 size -= plaintext_size;
390 if (mxf->aesc)
391 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
392 &pkt->data[plaintext_size], size >> 4, ivec, 1);
393 av_shrink_packet(pkt, orig_size);
394 pkt->stream_index = index;
395 avio_skip(pb, end - avio_tell(pb));
396 return 0;
397 }
398
399 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
400 {
401 MXFContext *mxf = arg;
402 int item_num = avio_rb32(pb);
403 int item_len = avio_rb32(pb);
404
405 if (item_len != 18) {
406 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
407 return AVERROR_PATCHWELCOME;
408 }
409 if (item_num > UINT_MAX / item_len)
410 return AVERROR_INVALIDDATA;
411 mxf->local_tags_count = item_num;
412 mxf->local_tags = av_malloc(item_num*item_len);
413 if (!mxf->local_tags)
414 return AVERROR(ENOMEM);
415 avio_read(pb, mxf->local_tags, item_num*item_len);
416 return 0;
417 }
418
419 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
420 {
421 MXFContext *mxf = arg;
422 MXFPartition *partition;
423 UID op;
424 uint64_t footer_partition;
425 uint32_t nb_essence_containers;
426 int err;
427
428 if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
429 sizeof(*mxf->partitions))) < 0) {
430 mxf->partitions_count = 0;
431 return err;
432 }
433
434 if (mxf->parsing_backward) {
435 /* insert the new partition pack in the middle
436 * this makes the entries in mxf->partitions sorted by offset */
437 memmove(&mxf->partitions[mxf->last_forward_partition+1],
438 &mxf->partitions[mxf->last_forward_partition],
439 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
440 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
441 } else {
442 mxf->last_forward_partition++;
443 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
444 }
445
446 memset(partition, 0, sizeof(*partition));
447 mxf->partitions_count++;
448 partition->pack_length = avio_tell(pb) - klv_offset + size;
449
450 switch(uid[13]) {
451 case 2:
452 partition->type = Header;
453 break;
454 case 3:
455 partition->type = BodyPartition;
456 break;
457 case 4:
458 partition->type = Footer;
459 break;
460 default:
461 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
462 return AVERROR_INVALIDDATA;
463 }
464
465 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
466 partition->closed = partition->type == Footer || !(uid[14] & 1);
467 partition->complete = uid[14] > 2;
468 avio_skip(pb, 4);
469 partition->kag_size = avio_rb32(pb);
470 partition->this_partition = avio_rb64(pb);
471 partition->previous_partition = avio_rb64(pb);
472 footer_partition = avio_rb64(pb);
473 partition->header_byte_count = avio_rb64(pb);
474 partition->index_byte_count = avio_rb64(pb);
475 partition->index_sid = avio_rb32(pb);
476 avio_skip(pb, 8);
477 partition->body_sid = avio_rb32(pb);
478 avio_read(pb, op, sizeof(UID));
479 nb_essence_containers = avio_rb32(pb);
480
481 /* some files don'thave FooterPartition set in every partition */
482 if (footer_partition) {
483 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
484 av_log(mxf->fc, AV_LOG_ERROR,
485 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
486 mxf->footer_partition, footer_partition);
487 } else {
488 mxf->footer_partition = footer_partition;
489 }
490 }
491
492 av_dlog(mxf->fc,
493 "PartitionPack: ThisPartition = 0x%"PRIX64
494 ", PreviousPartition = 0x%"PRIX64", "
495 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
496 partition->this_partition,
497 partition->previous_partition, footer_partition,
498 partition->index_sid, partition->body_sid);
499
500 /* sanity check PreviousPartition if set */
501 if (partition->previous_partition &&
502 mxf->run_in + partition->previous_partition >= klv_offset) {
503 av_log(mxf->fc, AV_LOG_ERROR,
504 "PreviousPartition points to this partition or forward\n");
505 return AVERROR_INVALIDDATA;
506 }
507
508 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
509 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
510 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
511 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
512 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
513 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
514 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
515 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
516 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
517 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
518 else if (op[12] == 0x10) {
519 /* SMPTE 390m: "There shall be exactly one essence container"
520 * The following block deals with files that violate this, namely:
521 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
522 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
523 if (nb_essence_containers != 1) {
524 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
525
526 /* only nag once */
527 if (!mxf->op)
528 av_log(mxf->fc, AV_LOG_WARNING,
529 "\"OPAtom\" with %u ECs - assuming %s\n",
530 nb_essence_containers,
531 op == OP1a ? "OP1a" : "OPAtom");
532
533 mxf->op = op;
534 } else
535 mxf->op = OPAtom;
536 } else {
537 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
538 mxf->op = OP1a;
539 }
540
541 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
542 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
543
544 if (mxf->op == OPSonyOpt)
545 partition->kag_size = 512;
546 else
547 partition->kag_size = 1;
548
549 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
550 }
551
552 return 0;
553 }
554
555 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
556 {
557 int err;
558
559 if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
560 sizeof(*mxf->metadata_sets))) < 0) {
561 mxf->metadata_sets_count = 0;
562 return err;
563 }
564 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
565 mxf->metadata_sets_count++;
566 return 0;
567 }
568
569 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
570 {
571 MXFCryptoContext *cryptocontext = arg;
572 if (size != 16)
573 return AVERROR_INVALIDDATA;
574 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
575 avio_read(pb, cryptocontext->source_container_ul, 16);
576 return 0;
577 }
578
579 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
580 {
581 MXFContext *mxf = arg;
582 switch (tag) {
583 case 0x1901:
584 mxf->packages_count = avio_rb32(pb);
585 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
586 return AVERROR_INVALIDDATA;
587 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
588 if (!mxf->packages_refs)
589 return AVERROR(ENOMEM);
590 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
591 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
592 break;
593 }
594 return 0;
595 }
596
597 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
598 {
599 MXFStructuralComponent *source_clip = arg;
600 switch(tag) {
601 case 0x0202:
602 source_clip->duration = avio_rb64(pb);
603 break;
604 case 0x1201:
605 source_clip->start_position = avio_rb64(pb);
606 break;
607 case 0x1101:
608 /* UMID, only get last 16 bytes */
609 avio_skip(pb, 16);
610 avio_read(pb, source_clip->source_package_uid, 16);
611 break;
612 case 0x1102:
613 source_clip->source_track_id = avio_rb32(pb);
614 break;
615 }
616 return 0;
617 }
618
619 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
620 {
621 MXFPackage *package = arg;
622 switch(tag) {
623 case 0x4403:
624 package->tracks_count = avio_rb32(pb);
625 if (package->tracks_count >= UINT_MAX / sizeof(UID))
626 return AVERROR_INVALIDDATA;
627 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
628 if (!package->tracks_refs)
629 return AVERROR(ENOMEM);
630 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
631 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
632 break;
633 }
634 return 0;
635 }
636
637 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
638 {
639 MXFTrack *track = arg;
640 switch(tag) {
641 case 0x4801:
642 track->track_id = avio_rb32(pb);
643 break;
644 case 0x4804:
645 avio_read(pb, track->track_number, 4);
646 break;
647 case 0x4B01:
648 track->edit_rate.num = avio_rb32(pb);
649 track->edit_rate.den = avio_rb32(pb);
650 break;
651 case 0x4803:
652 avio_read(pb, track->sequence_ref, 16);
653 break;
654 }
655 return 0;
656 }
657
658 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
659 {
660 MXFSequence *sequence = arg;
661 switch(tag) {
662 case 0x0202:
663 sequence->duration = avio_rb64(pb);
664 break;
665 case 0x0201:
666 avio_read(pb, sequence->data_definition_ul, 16);
667 break;
668 case 0x1001:
669 sequence->structural_components_count = avio_rb32(pb);
670 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
671 return AVERROR_INVALIDDATA;
672 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
673 if (!sequence->structural_components_refs)
674 return AVERROR(ENOMEM);
675 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
676 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
677 break;
678 }
679 return 0;
680 }
681
682 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
683 {
684 MXFPackage *package = arg;
685 switch(tag) {
686 case 0x4403:
687 package->tracks_count = avio_rb32(pb);
688 if (package->tracks_count >= UINT_MAX / sizeof(UID))
689 return AVERROR_INVALIDDATA;
690 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
691 if (!package->tracks_refs)
692 return AVERROR(ENOMEM);
693 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
694 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
695 break;
696 case 0x4401:
697 /* UMID, only get last 16 bytes */
698 avio_skip(pb, 16);
699 avio_read(pb, package->package_uid, 16);
700 break;
701 case 0x4701:
702 avio_read(pb, package->descriptor_ref, 16);
703 break;
704 }
705 return 0;
706 }
707
708 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
709 {
710 int i, length;
711
712 segment->nb_index_entries = avio_rb32(pb);
713 if (!segment->nb_index_entries)
714 return 0;
715 else if (segment->nb_index_entries < 0 ||
716 segment->nb_index_entries >
717 (INT_MAX / sizeof(*segment->stream_offset_entries)))
718 return AVERROR(ENOMEM);
719
720 length = avio_rb32(pb);
721
722 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
723 sizeof(*segment->temporal_offset_entries));
724 segment->flag_entries = av_mallocz(segment->nb_index_entries *
725 sizeof(*segment->flag_entries));
726 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
727 sizeof(*segment->stream_offset_entries));
728
729 if (!segment->flag_entries || !segment->stream_offset_entries ||
730 !segment->temporal_offset_entries) {
731 av_freep(&segment->flag_entries);
732 av_freep(&segment->stream_offset_entries);
733 av_freep(&segment->temporal_offset_entries);
734 return AVERROR(ENOMEM);
735 }
736
737 for (i = 0; i < segment->nb_index_entries; i++) {
738 segment->temporal_offset_entries[i] = avio_r8(pb);
739 avio_r8(pb); /* KeyFrameOffset */
740 segment->flag_entries[i] = avio_r8(pb);
741 segment->stream_offset_entries[i] = avio_rb64(pb);
742 avio_skip(pb, length - 11);
743 }
744 return 0;
745 }
746
747 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
748 {
749 MXFIndexTableSegment *segment = arg;
750 switch(tag) {
751 case 0x3F05:
752 segment->edit_unit_byte_count = avio_rb32(pb);
753 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
754 break;
755 case 0x3F06:
756 segment->index_sid = avio_rb32(pb);
757 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
758 break;
759 case 0x3F07:
760 segment->body_sid = avio_rb32(pb);
761 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
762 break;
763 case 0x3F0A:
764 av_dlog(NULL, "IndexEntryArray found\n");
765 return mxf_read_index_entry_array(pb, segment);
766 case 0x3F0B:
767 segment->index_edit_rate.num = avio_rb32(pb);
768 segment->index_edit_rate.den = avio_rb32(pb);
769 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
770 segment->index_edit_rate.den);
771 break;
772 case 0x3F0C:
773 segment->index_start_position = avio_rb64(pb);
774 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
775 break;
776 case 0x3F0D:
777 segment->index_duration = avio_rb64(pb);
778 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
779 break;
780 }
781 return 0;
782 }
783
784 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
785 {
786 int code, value, ofs = 0;
787 char layout[16] = {0};
788
789 do {
790 code = avio_r8(pb);
791 value = avio_r8(pb);
792 av_dlog(NULL, "pixel layout: code %#x\n", code);
793
794 if (ofs < 16) {
795 layout[ofs++] = code;
796 layout[ofs++] = value;
797 }
798 } while (code != 0); /* SMPTE 377M E.2.46 */
799
800 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
801 }
802
803 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
804 {
805 MXFDescriptor *descriptor = arg;
806 descriptor->pix_fmt = AV_PIX_FMT_NONE;
807 switch(tag) {
808 case 0x3F01:
809 descriptor->sub_descriptors_count = avio_rb32(pb);
810 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
811 return AVERROR_INVALIDDATA;
812 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
813 if (!descriptor->sub_descriptors_refs)
814 return AVERROR(ENOMEM);
815 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
816 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
817 break;
818 case 0x3004:
819 avio_read(pb, descriptor->essence_container_ul, 16);
820 break;
821 case 0x3006:
822 descriptor->linked_track_id = avio_rb32(pb);
823 break;
824 case 0x3201: /* PictureEssenceCoding */
825 avio_read(pb, descriptor->essence_codec_ul, 16);
826 break;
827 case 0x3203:
828 descriptor->width = avio_rb32(pb);
829 break;
830 case 0x3202:
831 descriptor->height = avio_rb32(pb);
832 break;
833 case 0x320C:
834 descriptor->frame_layout = avio_r8(pb);
835 break;
836 case 0x320E:
837 descriptor->aspect_ratio.num = avio_rb32(pb);
838 descriptor->aspect_ratio.den = avio_rb32(pb);
839 break;
840 case 0x3212:
841 descriptor->field_dominance = avio_r8(pb);
842 break;
843 case 0x3301:
844 descriptor->component_depth = avio_rb32(pb);
845 break;
846 case 0x3302:
847 descriptor->horiz_subsampling = avio_rb32(pb);
848 break;
849 case 0x3308:
850 descriptor->vert_subsampling = avio_rb32(pb);
851 break;
852 case 0x3D03:
853 descriptor->sample_rate.num = avio_rb32(pb);
854 descriptor->sample_rate.den = avio_rb32(pb);
855 break;
856 case 0x3D06: /* SoundEssenceCompression */
857 avio_read(pb, descriptor->essence_codec_ul, 16);
858 break;
859 case 0x3D07:
860 descriptor->channels = avio_rb32(pb);
861 break;
862 case 0x3D01:
863 descriptor->bits_per_sample = avio_rb32(pb);
864 break;
865 case 0x3401:
866 mxf_read_pixel_layout(pb, descriptor);
867 break;
868 default:
869 /* Private uid used by SONY C0023S01.mxf */
870 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
871 av_free(descriptor->extradata);
872 descriptor->extradata_size = 0;
873 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
874 if (!descriptor->extradata)
875 return AVERROR(ENOMEM);
876 descriptor->extradata_size = size;
877 avio_read(pb, descriptor->extradata, size);
878 }
879 break;
880 }
881 return 0;
882 }
883
884 /*
885 * Match an uid independently of the version byte and up to len common bytes
886 * Returns: boolean
887 */
888 static int mxf_match_uid(const UID key, const UID uid, int len)
889 {
890 int i;
891 for (i = 0; i < len; i++) {
892 if (i != 7 && key[i] != uid[i])
893 return 0;
894 }
895 return 1;
896 }
897
898 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
899 {
900 while (uls->uid[0]) {
901 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
902 break;
903 uls++;
904 }
905 return uls;
906 }
907
908 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
909 {
910 int i;
911
912 if (!strong_ref)
913 return NULL;
914 for (i = 0; i < mxf->metadata_sets_count; i++) {
915 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
916 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
917 return mxf->metadata_sets[i];
918 }
919 }
920 return NULL;
921 }
922
923 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
924 // video essence container uls
925 { { 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 */
926 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
927 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
928 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
929 };
930
931 /* EC ULs for intra-only formats */
932 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
933 { { 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 */
934 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
935 };
936
937 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
938 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
939 { { 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 */
940 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
941 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
942 };
943
944 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
945 // sound essence container uls
946 { { 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 */
947 { { 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 */
948 { { 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 */
949 { { 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 */
950 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
951 };
952
953 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
954 {
955 int i, j, nb_segments = 0;
956 MXFIndexTableSegment **unsorted_segments;
957 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
958
959 /* count number of segments, allocate arrays and copy unsorted segments */
960 for (i = 0; i < mxf->metadata_sets_count; i++)
961 if (mxf->metadata_sets[i]->type == IndexTableSegment)
962 nb_segments++;
963
964 if (!nb_segments)
965 return AVERROR_INVALIDDATA;
966
967 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
968 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
969 if (!*sorted_segments || !unsorted_segments) {
970 av_freep(sorted_segments);
971 av_free(unsorted_segments);
972 return AVERROR(ENOMEM);
973 }
974
975 for (i = j = 0; i < mxf->metadata_sets_count; i++)
976 if (mxf->metadata_sets[i]->type == IndexTableSegment)
977 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
978
979 *nb_sorted_segments = 0;
980
981 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
982 for (i = 0; i < nb_segments; i++) {
983 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
984 uint64_t best_index_duration = 0;
985
986 for (j = 0; j < nb_segments; j++) {
987 MXFIndexTableSegment *s = unsorted_segments[j];
988
989 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
990 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
991 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
992 */
993 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
994 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
995 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
996 best = j;
997 best_body_sid = s->body_sid;
998 best_index_sid = s->index_sid;
999 best_index_start = s->index_start_position;
1000 best_index_duration = s->index_duration;
1001 }
1002 }
1003
1004 /* no suitable entry found -> we're done */
1005 if (best == -1)
1006 break;
1007
1008 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1009 last_body_sid = best_body_sid;
1010 last_index_sid = best_index_sid;
1011 last_index_start = best_index_start;
1012 }
1013
1014 av_free(unsorted_segments);
1015
1016 return 0;
1017 }
1018
1019 /**
1020 * Computes the absolute file offset of the given essence container offset
1021 */
1022 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1023 {
1024 int x;
1025 int64_t offset_in = offset; /* for logging */
1026
1027 for (x = 0; x < mxf->partitions_count; x++) {
1028 MXFPartition *p = &mxf->partitions[x];
1029
1030 if (p->body_sid != body_sid)
1031 continue;
1032
1033 if (offset < p->essence_length || !p->essence_length) {
1034 *offset_out = p->essence_offset + offset;
1035 return 0;
1036 }
1037
1038 offset -= p->essence_length;
1039 }
1040
1041 av_log(mxf->fc, AV_LOG_ERROR,
1042 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1043 offset_in, body_sid);
1044
1045 return AVERROR_INVALIDDATA;
1046 }
1047
1048 /**
1049 * Returns the end position of the essence container with given BodySID, or zero if unknown
1050 */
1051 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1052 {
1053 int x;
1054 int64_t ret = 0;
1055
1056 for (x = 0; x < mxf->partitions_count; x++) {
1057 MXFPartition *p = &mxf->partitions[x];
1058
1059 if (p->body_sid != body_sid)
1060 continue;
1061
1062 if (!p->essence_length)
1063 return 0;
1064
1065 ret = p->essence_offset + p->essence_length;
1066 }
1067
1068 return ret;
1069 }
1070
1071 /* EditUnit -> absolute offset */
1072 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)
1073 {
1074 int i;
1075 int64_t offset_temp = 0;
1076
1077 for (i = 0; i < index_table->nb_segments; i++) {
1078 MXFIndexTableSegment *s = index_table->segments[i];
1079
1080 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1081
1082 if (edit_unit < s->index_start_position + s->index_duration) {
1083 int64_t index = edit_unit - s->index_start_position;
1084
1085 if (s->edit_unit_byte_count)
1086 offset_temp += s->edit_unit_byte_count * index;
1087 else if (s->nb_index_entries) {
1088 if (s->nb_index_entries == 2 * s->index_duration + 1)
1089 index *= 2; /* Avid index */
1090
1091 if (index < 0 || index >= s->nb_index_entries) {
1092 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1093 index_table->index_sid, s->index_start_position);
1094 return AVERROR_INVALIDDATA;
1095 }
1096
1097 offset_temp = s->stream_offset_entries[index];
1098 } else {
1099 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1100 index_table->index_sid, s->index_start_position);
1101 return AVERROR_INVALIDDATA;
1102 }
1103
1104 if (edit_unit_out)
1105 *edit_unit_out = edit_unit;
1106
1107 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1108 } else {
1109 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1110 offset_temp += s->edit_unit_byte_count * s->index_duration;
1111 }
1112 }
1113
1114 if (nag)
1115 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);
1116
1117 return AVERROR_INVALIDDATA;
1118 }
1119
1120 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1121 {
1122 int i, j, x;
1123 int8_t max_temporal_offset = -128;
1124
1125 /* first compute how many entries we have */
1126 for (i = 0; i < index_table->nb_segments; i++) {
1127 MXFIndexTableSegment *s = index_table->segments[i];
1128
1129 if (!s->nb_index_entries) {
1130 index_table->nb_ptses = 0;
1131 return 0; /* no TemporalOffsets */
1132 }
1133
1134 index_table->nb_ptses += s->index_duration;
1135 }
1136
1137 /* paranoid check */
1138 if (index_table->nb_ptses <= 0)
1139 return 0;
1140
1141 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1142 return AVERROR(ENOMEM);
1143
1144 index_table->ptses = av_mallocz(index_table->nb_ptses *
1145 sizeof(int64_t));
1146 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1147 sizeof(AVIndexEntry));
1148 if (!index_table->ptses || !index_table->fake_index) {
1149 av_freep(&index_table->ptses);
1150 return AVERROR(ENOMEM);
1151 }
1152
1153 /* we may have a few bad TemporalOffsets
1154 * make sure the corresponding PTSes don't have the bogus value 0 */
1155 for (x = 0; x < index_table->nb_ptses; x++)
1156 index_table->ptses[x] = AV_NOPTS_VALUE;
1157
1158 /**
1159 * We have this:
1160 *
1161 * x TemporalOffset
1162 * 0: 0
1163 * 1: 1
1164 * 2: 1
1165 * 3: -2
1166 * 4: 1
1167 * 5: 1
1168 * 6: -2
1169 *
1170 * We want to transform it into this:
1171 *
1172 * x DTS PTS
1173 * 0: -1 0
1174 * 1: 0 3
1175 * 2: 1 1
1176 * 3: 2 2
1177 * 4: 3 6
1178 * 5: 4 4
1179 * 6: 5 5
1180 *
1181 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1182 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1183 * The latter makes DTS <= PTS.
1184 */
1185 for (i = x = 0; i < index_table->nb_segments; i++) {
1186 MXFIndexTableSegment *s = index_table->segments[i];
1187 int index_delta = 1;
1188 int n = s->nb_index_entries;
1189
1190 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1191 index_delta = 2; /* Avid index */
1192 /* ignore the last entry - it's the size of the essence container */
1193 n--;
1194 }
1195
1196 for (j = 0; j < n; j += index_delta, x++) {
1197 int offset = s->temporal_offset_entries[j] / index_delta;
1198 int index = x + offset;
1199
1200 if (x >= index_table->nb_ptses) {
1201 av_log(mxf->fc, AV_LOG_ERROR,
1202 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1203 s->nb_index_entries, s->index_duration);
1204 break;
1205 }
1206
1207 index_table->fake_index[x].timestamp = x;
1208 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1209
1210 if (index < 0 || index >= index_table->nb_ptses) {
1211 av_log(mxf->fc, AV_LOG_ERROR,
1212 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1213 x, offset, index);
1214 continue;
1215 }
1216
1217 index_table->ptses[index] = x;
1218 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1219 }
1220 }
1221
1222 index_table->first_dts = -max_temporal_offset;
1223
1224 return 0;
1225 }
1226
1227 /**
1228 * Sorts and collects index table segments into index tables.
1229 * Also computes PTSes if possible.
1230 */
1231 static int mxf_compute_index_tables(MXFContext *mxf)
1232 {
1233 int i, j, k, ret, nb_sorted_segments;
1234 MXFIndexTableSegment **sorted_segments = NULL;
1235
1236 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1237 nb_sorted_segments <= 0) {
1238 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1239 return 0;
1240 }
1241
1242 /* sanity check and count unique BodySIDs/IndexSIDs */
1243 for (i = 0; i < nb_sorted_segments; i++) {
1244 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1245 mxf->nb_index_tables++;
1246 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1247 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1248 ret = AVERROR_INVALIDDATA;
1249 goto finish_decoding_index;
1250 }
1251 }
1252
1253 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1254 sizeof(*mxf->index_tables));
1255 if (!mxf->index_tables) {
1256 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1257 ret = AVERROR(ENOMEM);
1258 goto finish_decoding_index;
1259 }
1260
1261 /* distribute sorted segments to index tables */
1262 for (i = j = 0; i < nb_sorted_segments; i++) {
1263 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1264 /* next IndexSID */
1265 j++;
1266 }
1267
1268 mxf->index_tables[j].nb_segments++;
1269 }
1270
1271 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1272 MXFIndexTable *t = &mxf->index_tables[j];
1273
1274 t->segments = av_mallocz_array(t->nb_segments,
1275 sizeof(*t->segments));
1276
1277 if (!t->segments) {
1278 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1279 " pointer array\n");
1280 ret = AVERROR(ENOMEM);
1281 goto finish_decoding_index;
1282 }
1283
1284 if (sorted_segments[i]->index_start_position)
1285 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1286 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1287
1288 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1289 t->index_sid = sorted_segments[i]->index_sid;
1290 t->body_sid = sorted_segments[i]->body_sid;
1291
1292 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1293 goto finish_decoding_index;
1294
1295 /* fix zero IndexDurations */
1296 for (k = 0; k < t->nb_segments; k++) {
1297 if (t->segments[k]->index_duration)
1298 continue;
1299
1300 if (t->nb_segments > 1)
1301 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1302 t->index_sid, k);
1303
1304 if (mxf->fc->nb_streams <= 0) {
1305 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1306 break;
1307 }
1308
1309 /* assume the first stream's duration is reasonable
1310 * leave index_duration = 0 on further segments in case we have any (unlikely)
1311 */
1312 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1313 break;
1314 }
1315 }
1316
1317 ret = 0;
1318 finish_decoding_index:
1319 av_free(sorted_segments);
1320 return ret;
1321 }
1322
1323 static int mxf_is_intra_only(MXFDescriptor *d)
1324 {
1325 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1326 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1327 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1328 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1329 }
1330
1331 static int mxf_parse_structural_metadata(MXFContext *mxf)
1332 {
1333 MXFPackage *material_package = NULL;
1334 MXFPackage *temp_package = NULL;
1335 int i, j, k, ret;
1336
1337 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1338 /* TODO: handle multiple material packages (OP3x) */
1339 for (i = 0; i < mxf->packages_count; i++) {
1340 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1341 if (material_package) break;
1342 }
1343 if (!material_package) {
1344 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1345 return AVERROR_INVALIDDATA;
1346 }
1347
1348 for (i = 0; i < material_package->tracks_count; i++) {
1349 MXFPackage *source_package = NULL;
1350 MXFTrack *material_track = NULL;
1351 MXFTrack *source_track = NULL;
1352 MXFTrack *temp_track = NULL;
1353 MXFDescriptor *descriptor = NULL;
1354 MXFStructuralComponent *component = NULL;
1355 UID *essence_container_ul = NULL;
1356 const MXFCodecUL *codec_ul = NULL;
1357 const MXFCodecUL *container_ul = NULL;
1358 const MXFCodecUL *pix_fmt_ul = NULL;
1359 AVStream *st;
1360
1361 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1362 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1363 continue;
1364 }
1365
1366 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1367 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1368 continue;
1369 }
1370
1371 /* TODO: handle multiple source clips */
1372 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1373 /* TODO: handle timecode component */
1374 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1375 if (!component)
1376 continue;
1377
1378 for (k = 0; k < mxf->packages_count; k++) {
1379 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1380 if (!temp_package)
1381 continue;
1382 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1383 source_package = temp_package;
1384 break;
1385 }
1386 }
1387 if (!source_package) {
1388 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1389 break;
1390 }
1391 for (k = 0; k < source_package->tracks_count; k++) {
1392 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1393 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1394 ret = AVERROR_INVALIDDATA;
1395 goto fail_and_free;
1396 }
1397 if (temp_track->track_id == component->source_track_id) {
1398 source_track = temp_track;
1399 break;
1400 }
1401 }
1402 if (!source_track) {
1403 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1404 break;
1405 }
1406 }
1407 if (!source_track || !component)
1408 continue;
1409
1410 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1411 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1412 ret = AVERROR_INVALIDDATA;
1413 goto fail_and_free;
1414 }
1415
1416 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1417 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1418 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1419 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1420 continue;
1421 }
1422
1423 st = avformat_new_stream(mxf->fc, NULL);
1424 if (!st) {
1425 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1426 ret = AVERROR(ENOMEM);
1427 goto fail_and_free;
1428 }
1429 st->id = source_track->track_id;
1430 st->priv_data = source_track;
1431 source_track->original_duration = st->duration = component->duration;
1432 if (st->duration == -1)
1433 st->duration = AV_NOPTS_VALUE;
1434 st->start_time = component->start_position;
1435 if (material_track->edit_rate.num <= 0 ||
1436 material_track->edit_rate.den <= 0) {
1437 av_log(mxf->fc, AV_LOG_WARNING,
1438 "Invalid edit rate (%d/%d) found on stream #%d, "
1439 "defaulting to 25/1\n",
1440 material_track->edit_rate.num,
1441 material_track->edit_rate.den, st->index);
1442 material_track->edit_rate = (AVRational){25, 1};
1443 }
1444 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1445
1446 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1447 * the former is accessible via st->priv_data */
1448 source_track->edit_rate = material_track->edit_rate;
1449
1450 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1451 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1452 st->codec->codec_type = codec_ul->id;
1453
1454 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1455 if (source_package->descriptor) {
1456 if (source_package->descriptor->type == MultipleDescriptor) {
1457 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1458 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1459
1460 if (!sub_descriptor) {
1461 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1462 continue;
1463 }
1464 if (sub_descriptor->linked_track_id == source_track->track_id) {
1465 descriptor = sub_descriptor;
1466 break;
1467 }
1468 }
1469 } else if (source_package->descriptor->type == Descriptor)
1470 descriptor = source_package->descriptor;
1471 }
1472 if (!descriptor) {
1473 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1474 continue;
1475 }
1476 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1477 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1478 essence_container_ul = &descriptor->essence_container_ul;
1479 /* HACK: replacing the original key with mxf_encrypted_essence_container
1480 * is not allowed according to s429-6, try to find correct information anyway */
1481 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1482 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1483 for (k = 0; k < mxf->metadata_sets_count; k++) {
1484 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1485 if (metadata->type == CryptoContext) {
1486 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1487 break;
1488 }
1489 }
1490 }
1491
1492 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1493 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1494 st->codec->codec_id = codec_ul->id;
1495
1496 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1497 source_track->intra_only = mxf_is_intra_only(descriptor);
1498 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1499 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1500 st->codec->codec_id = container_ul->id;
1501 st->codec->width = descriptor->width;
1502 /* Field height, not frame height */
1503 st->codec->height = descriptor->height;
1504 switch (descriptor->frame_layout) {
1505 case SegmentedFrame:
1506 /* This one is a weird layout I don't fully understand. */
1507 av_log(mxf->fc, AV_LOG_INFO,
1508 "SegmentedFrame layout isn't currently supported\n");
1509 break;
1510 case FullFrame:
1511 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1512 break;
1513 case OneField:
1514 /* Every other line is stored and needs to be duplicated. */
1515 av_log(mxf->fc, AV_LOG_INFO,
1516 "OneField frame layout isn't currently supported\n");
1517 break;
1518 /* The correct thing to do here is fall through, but by
1519 * breaking we might be able to decode some streams at half
1520 * the vertical resolution, rather than not al all.
1521 * It's also for compatibility with the old behavior. */
1522 case SeparateFields:
1523 case MixedFields:
1524 switch (descriptor->field_dominance) {
1525 case MXF_TFF:
1526 st->codec->field_order = AV_FIELD_TT;
1527 break;
1528 case MXF_BFF:
1529 st->codec->field_order = AV_FIELD_BB;
1530 break;
1531 default:
1532 avpriv_request_sample(mxf->fc,
1533 "Field dominance %d support",
1534 descriptor->field_dominance);
1535 break;
1536 }
1537 /* Turn field height into frame height. */
1538 st->codec->height *= 2;
1539 default:
1540 av_log(mxf->fc, AV_LOG_INFO,
1541 "Unknown frame layout type: %d\n",
1542 descriptor->frame_layout);
1543 }
1544 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1545 st->codec->pix_fmt = descriptor->pix_fmt;
1546 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1547 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1548 &descriptor->essence_codec_ul);
1549 st->codec->pix_fmt = pix_fmt_ul->id;
1550 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1551 /* support files created before RP224v10 by defaulting to UYVY422
1552 if subsampling is 4:2:2 and component depth is 8-bit */
1553 if (descriptor->horiz_subsampling == 2 &&
1554 descriptor->vert_subsampling == 1 &&
1555 descriptor->component_depth == 8) {
1556 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1557 }
1558 }
1559 }
1560 }
1561 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1562 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1563 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1564 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1565 st->codec->codec_id = container_ul->id;
1566 st->codec->channels = descriptor->channels;
1567 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1568
1569 if (descriptor->sample_rate.den > 0) {
1570 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1571 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1572 } else {
1573 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1574 "found for stream #%d, time base forced to 1/48000\n",
1575 descriptor->sample_rate.num, descriptor->sample_rate.den,
1576 st->index);
1577 avpriv_set_pts_info(st, 64, 1, 48000);
1578 }
1579
1580 /* if duration is set, rescale it from EditRate to SampleRate */
1581 if (st->duration != AV_NOPTS_VALUE)
1582 st->duration = av_rescale_q(st->duration,
1583 av_inv_q(material_track->edit_rate),
1584 st->time_base);
1585
1586 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1587 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1588 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1589 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1590 else if (descriptor->bits_per_sample == 32)
1591 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1592 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1593 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1594 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1595 else if (descriptor->bits_per_sample == 32)
1596 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1597 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1598 st->need_parsing = AVSTREAM_PARSE_FULL;
1599 }
1600 }
1601 if (descriptor->extradata) {
1602 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1603 if (st->codec->extradata) {
1604 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1605 st->codec->extradata_size = descriptor->extradata_size;
1606 }
1607 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1608 ret = ff_generate_avci_extradata(st);
1609 if (ret < 0)
1610 return ret;
1611 }
1612 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1613 /* TODO: decode timestamps */
1614 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1615 }
1616 }
1617
1618 ret = 0;
1619 fail_and_free:
1620 return ret;
1621 }
1622
1623 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1624 {
1625 int ret;
1626 size_t buf_size;
1627
1628 if (size < 0)
1629 return AVERROR(EINVAL);
1630
1631 buf_size = size + size / 2 + 1;
1632 *str = av_malloc(buf_size);
1633 if (!*str)
1634 return AVERROR(ENOMEM);
1635
1636 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1637 av_freep(str);
1638 return ret;
1639 }
1640
1641 return ret;
1642 }
1643
1644 static int mxf_uid_to_str(UID uid, char **str)
1645 {
1646 int i;
1647 char *p;
1648 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1649 if (!p)
1650 return AVERROR(ENOMEM);
1651 for (i = 0; i < sizeof(UID); i++) {
1652 snprintf(p, 2 + 1, "%.2x", uid[i]);
1653 p += 2;
1654 if (i == 3 || i == 5 || i == 7 || i == 9) {
1655 snprintf(p, 1 + 1, "-");
1656 p++;
1657 }
1658 }
1659 return 0;
1660 }
1661
1662 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1663 {
1664 struct tm time = { 0 };
1665 time.tm_year = (timestamp >> 48) - 1900;
1666 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1667 time.tm_mday = (timestamp >> 32 & 0xFF);
1668 time.tm_hour = (timestamp >> 24 & 0xFF);
1669 time.tm_min = (timestamp >> 16 & 0xFF);
1670 time.tm_sec = (timestamp >> 8 & 0xFF);
1671
1672 *str = av_mallocz(32);
1673 if (!*str)
1674 return AVERROR(ENOMEM);
1675 strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1676
1677 return 0;
1678 }
1679
1680 #define SET_STR_METADATA(pb, name, str) do { \
1681 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1682 return ret; \
1683 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1684 } while (0)
1685
1686 #define SET_UID_METADATA(pb, name, var, str) do { \
1687 avio_read(pb, var, 16); \
1688 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1689 return ret; \
1690 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1691 } while (0)
1692
1693 #define SET_TS_METADATA(pb, name, var, str) do { \
1694 var = avio_rb64(pb); \
1695 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1696 return ret; \
1697 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1698 } while (0)
1699
1700 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1701 {
1702 MXFContext *mxf = arg;
1703 AVFormatContext *s = mxf->fc;
1704 int ret;
1705 UID uid = { 0 };
1706 char *str = NULL;
1707 uint64_t ts;
1708 switch (tag) {
1709 case 0x3C01:
1710 SET_STR_METADATA(pb, "company_name", str);
1711 break;
1712 case 0x3C02:
1713 SET_STR_METADATA(pb, "product_name", str);
1714 break;
1715 case 0x3C04:
1716 SET_STR_METADATA(pb, "product_version", str);
1717 break;
1718 case 0x3C05:
1719 SET_UID_METADATA(pb, "product_uid", uid, str);
1720 break;
1721 case 0x3C06:
1722 SET_TS_METADATA(pb, "modification_date", ts, str);
1723 break;
1724 case 0x3C08:
1725 SET_STR_METADATA(pb, "application_platform", str);
1726 break;
1727 case 0x3C09:
1728 SET_UID_METADATA(pb, "generation_uid", uid, str);
1729 break;
1730 case 0x3C0A:
1731 SET_UID_METADATA(pb, "uid", uid, str);
1732 break;
1733 }
1734 return 0;
1735 }
1736
1737 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1738 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1739 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1740 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1741 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1742 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1743 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1744 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1745 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1746 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1747 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1748 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1749 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1750 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1751 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1752 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1753 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1754 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1755 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1756 { { 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 */
1757 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1758 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1759 { { 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 */
1760 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1761 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1762 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1763 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1764 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1765 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1766 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1767 };
1768
1769 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1770 {
1771 AVIOContext *pb = mxf->fc->pb;
1772 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1773 uint64_t klv_end = avio_tell(pb) + klv->length;
1774
1775 if (!ctx)
1776 return AVERROR(ENOMEM);
1777 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1778 int ret;
1779 int tag = avio_rb16(pb);
1780 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1781 uint64_t next = avio_tell(pb) + size;
1782 UID uid = {0};
1783
1784 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1785 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1786 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1787 continue;
1788 }
1789 if (tag > 0x7FFF) { /* dynamic tag */
1790 int i;
1791 for (i = 0; i < mxf->local_tags_count; i++) {
1792 int local_tag = AV_RB16(mxf->local_tags+i*18);
1793 if (local_tag == tag) {
1794 memcpy(uid, mxf->local_tags+i*18+2, 16);
1795 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1796 PRINT_KEY(mxf->fc, "uid", uid);
1797 }
1798 }
1799 }
1800 if (ctx_size && tag == 0x3C0A)
1801 avio_read(pb, ctx->uid, 16);
1802 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1803 return ret;
1804
1805 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1806 * it extending past the end of the KLV though (zzuf5.mxf). */
1807 if (avio_tell(pb) > klv_end) {
1808 if (ctx_size)
1809 av_free(ctx);
1810
1811 av_log(mxf->fc, AV_LOG_ERROR,
1812 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1813 tag, klv->offset);
1814 return AVERROR_INVALIDDATA;
1815 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1816 avio_seek(pb, next, SEEK_SET);
1817 }
1818 if (ctx_size) ctx->type = type;
1819 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1820 }
1821
1822 /**
1823 * Seeks to the previous partition, if possible
1824 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1825 */
1826 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1827 {
1828 AVIOContext *pb = mxf->fc->pb;
1829
1830 if (!mxf->current_partition ||
1831 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1832 return 0; /* we've parsed all partitions */
1833
1834 /* seek to previous partition */
1835 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1836 mxf->current_partition = NULL;
1837
1838 av_dlog(mxf->fc, "seeking to previous partition\n");
1839
1840 return 1;
1841 }
1842
1843 /**
1844 * Called when essence is encountered
1845 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1846 */
1847 static int mxf_parse_handle_essence(MXFContext *mxf)
1848 {
1849 AVIOContext *pb = mxf->fc->pb;
1850 int64_t ret;
1851
1852 if (mxf->parsing_backward) {
1853 return mxf_seek_to_previous_partition(mxf);
1854 } else {
1855 uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1856 : mxf->last_partition;
1857
1858 if (!offset) {
1859 av_dlog(mxf->fc, "no last partition\n");
1860 return 0;
1861 }
1862
1863 av_dlog(mxf->fc, "seeking to last partition\n");
1864
1865 /* remember where we were so we don't end up seeking further back than this */
1866 mxf->last_forward_tell = avio_tell(pb);
1867
1868 if (!pb->seekable) {
1869 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1870 return -1;
1871 }
1872
1873 /* seek to last partition and parse backward */
1874 if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1875 av_log(mxf->fc, AV_LOG_ERROR,
1876 "failed to seek to last partition @ 0x%" PRIx64
1877 " (%"PRId64") - partial file?\n",
1878 mxf->run_in + offset, ret);
1879 return ret;
1880 }
1881
1882 mxf->current_partition = NULL;
1883 mxf->parsing_backward = 1;
1884 }
1885
1886 return 1;
1887 }
1888
1889 /**
1890 * Called when the next partition or EOF is encountered
1891 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1892 */
1893 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1894 {
1895 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1896 }
1897
1898 /**
1899 * Figure out the proper offset and length of the essence container
1900 * in each partition
1901 */
1902 static void mxf_compute_essence_containers(MXFContext *mxf)
1903 {
1904 int x;
1905
1906 /* everything is already correct */
1907 if (mxf->op == OPAtom)
1908 return;
1909
1910 for (x = 0; x < mxf->partitions_count; x++) {
1911 MXFPartition *p = &mxf->partitions[x];
1912
1913 if (!p->body_sid)
1914 continue; /* BodySID == 0 -> no essence */
1915
1916 if (x >= mxf->partitions_count - 1)
1917 break; /* last partition - can't compute length (and we don't need to) */
1918
1919 /* essence container spans to the next partition */
1920 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1921
1922 if (p->essence_length < 0) {
1923 /* next ThisPartition < essence_offset */
1924 p->essence_length = 0;
1925 av_log(mxf->fc, AV_LOG_ERROR,
1926 "partition %i: bad ThisPartition = %"PRIX64"\n",
1927 x+1, mxf->partitions[x+1].this_partition);
1928 }
1929 }
1930 }
1931
1932 static int64_t round_to_kag(int64_t position, int kag_size)
1933 {
1934 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1935 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1936 int64_t ret = (position / kag_size) * kag_size;
1937 return ret == position ? ret : ret + kag_size;
1938 }
1939
1940 static inline void compute_partition_essence_offset(AVFormatContext *s,
1941 MXFContext *mxf,
1942 KLVPacket *klv)
1943 {
1944 MXFPartition *cur_part = mxf->current_partition;
1945 /* for OP1a we compute essence_offset
1946 * for OPAtom we point essence_offset after the KL
1947 * (usually op1a_essence_offset + 20 or 25)
1948 * TODO: for OP1a we could eliminate this entire if statement, always
1949 * stopping parsing at op1a_essence_offset
1950 * for OPAtom we still need the actual essence_offset though
1951 * (the KL's length can vary)
1952 */
1953 int64_t op1a_essence_offset =
1954 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1955 cur_part->kag_size) +
1956 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1957 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1958
1959 if (mxf->op == OPAtom) {
1960 /* point essence_offset to the actual data
1961 * OPAtom has all the essence in one big KLV
1962 */
1963 cur_part->essence_offset = avio_tell(s->pb);
1964 cur_part->essence_length = klv->length;
1965 } else {
1966 /* NOTE: op1a_essence_offset may be less than to klv.offset
1967 * (C0023S01.mxf) */
1968 cur_part->essence_offset = op1a_essence_offset;
1969 }
1970 }
1971
1972 static int is_pcm(enum AVCodecID codec_id)
1973 {
1974 /* we only care about "normal" PCM codecs until we get samples */
1975 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1976 }
1977
1978 /**
1979 * Deal with the case where for some audio atoms EditUnitByteCount is
1980 * very small (2, 4..). In those cases we should read more than one
1981 * sample per call to mxf_read_packet().
1982 */
1983 static void mxf_handle_small_eubc(AVFormatContext *s)
1984 {
1985 MXFContext *mxf = s->priv_data;
1986
1987 /* assuming non-OPAtom == frame wrapped
1988 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1989 if (mxf->op != OPAtom)
1990 return;
1991
1992 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1993 if (s->nb_streams != 1 ||
1994 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1995 !is_pcm(s->streams[0]->codec->codec_id) ||
1996 mxf->nb_index_tables != 1 ||
1997 mxf->index_tables[0].nb_segments != 1 ||
1998 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1999 return;
2000
2001 /* arbitrarily default to 48 kHz PAL audio frame size */
2002 /* TODO: We could compute this from the ratio between the audio
2003 * and video edit rates for 48 kHz NTSC we could use the
2004 * 1802-1802-1802-1802-1801 pattern. */
2005 mxf->edit_units_per_packet = 1920;
2006 }
2007
2008 static void mxf_read_random_index_pack(AVFormatContext *s)
2009 {
2010 MXFContext *mxf = s->priv_data;
2011 uint32_t length;
2012 int64_t file_size;
2013 KLVPacket klv;
2014
2015 if (!s->pb->seekable)
2016 return;
2017
2018 file_size = avio_size(s->pb);
2019 avio_seek(s->pb, file_size - 4, SEEK_SET);
2020 length = avio_rb32(s->pb);
2021 if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2022 goto end;
2023 avio_seek(s->pb, file_size - length, SEEK_SET);
2024 if (klv_read_packet(&klv, s->pb) < 0 ||
2025 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2026 klv.length != length - 20)
2027 goto end;
2028
2029 avio_skip(s->pb, klv.length - 12);
2030 mxf->last_partition = avio_rb64(s->pb);
2031
2032 end:
2033 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2034 }
2035
2036 static int mxf_read_header(AVFormatContext *s)
2037 {
2038 MXFContext *mxf = s->priv_data;
2039 KLVPacket klv;
2040 int64_t essence_offset = 0;
2041 int ret;
2042
2043 mxf->last_forward_tell = INT64_MAX;
2044 mxf->edit_units_per_packet = 1;
2045
2046 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2047 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2048 return AVERROR_INVALIDDATA;
2049 }
2050 avio_seek(s->pb, -14, SEEK_CUR);
2051 mxf->fc = s;
2052 mxf->run_in = avio_tell(s->pb);
2053
2054 mxf_read_random_index_pack(s);
2055
2056 while (!s->pb->eof_reached) {
2057
2058 const MXFMetadataReadTableEntry *metadata;
2059
2060 if (klv_read_packet(&klv, s->pb) < 0) {
2061 /* EOF - seek to previous partition or stop */
2062 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2063 break;
2064 else
2065 continue;
2066 }
2067
2068 PRINT_KEY(s, "read header", klv.key);
2069 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2070 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2071 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2072 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2073 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2074
2075 if (!mxf->current_partition) {
2076 av_log(mxf->fc, AV_LOG_ERROR,
2077 "found essence prior to first PartitionPack\n");
2078 return AVERROR_INVALIDDATA;
2079 }
2080
2081 if (!mxf->current_partition->essence_offset) {
2082 compute_partition_essence_offset(s, mxf, &klv);
2083 }
2084
2085 if (!essence_offset)
2086 essence_offset = klv.offset;
2087
2088 /* seek to footer, previous partition or stop */
2089 if (mxf_parse_handle_essence(mxf) <= 0)
2090 break;
2091 continue;
2092 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2093 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2094 /* next partition pack - keep going, seek to previous partition or stop */
2095 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2096 break;
2097 else if (mxf->parsing_backward)
2098 continue;
2099 /* we're still parsing forward. proceed to parsing this partition pack */
2100 }
2101
2102 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2103 if (IS_KLV_KEY(klv.key, metadata->key)) {
2104 int res;
2105 if (klv.key[5] == 0x53) {
2106 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2107 } else {
2108 uint64_t next = avio_tell(s->pb) + klv.length;
2109 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2110
2111 /* only seek forward, else this can loop for a long time */
2112 if (avio_tell(s->pb) > next) {
2113 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2114 klv.offset);
2115 return AVERROR_INVALIDDATA;
2116 }
2117
2118 avio_seek(s->pb, next, SEEK_SET);
2119 }
2120 if (res < 0) {
2121 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2122 return res;
2123 }
2124 break;
2125 }
2126 }
2127 if (!metadata->read)
2128 avio_skip(s->pb, klv.length);
2129 }
2130 /* FIXME avoid seek */
2131 if (!essence_offset) {
2132 av_log(s, AV_LOG_ERROR, "no essence\n");
2133 return AVERROR_INVALIDDATA;
2134 }
2135 avio_seek(s->pb, essence_offset, SEEK_SET);
2136
2137 mxf_compute_essence_containers(mxf);
2138
2139 /* we need to do this before computing the index tables
2140 * to be able to fill in zero IndexDurations with st->duration */
2141 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2142 return ret;
2143
2144 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2145 return ret;
2146
2147 if (mxf->nb_index_tables > 1) {
2148 /* TODO: look up which IndexSID to use via EssenceContainerData */
2149 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2150 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2151 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2152 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2153 return AVERROR_INVALIDDATA;
2154 }
2155
2156 mxf_handle_small_eubc(s);
2157
2158 return 0;
2159 }
2160
2161 /**
2162 * Sets mxf->current_edit_unit based on what offset we're currently at.
2163 * @return next_ofs if OK, <0 on error
2164 */
2165 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2166 {
2167 int64_t last_ofs = -1, next_ofs = -1;
2168 MXFIndexTable *t = &mxf->index_tables[0];
2169
2170 /* this is called from the OP1a demuxing logic, which means there
2171 * may be no index tables */
2172 if (mxf->nb_index_tables <= 0)
2173 return -1;
2174
2175 /* find mxf->current_edit_unit so that the next edit unit starts ahead
2176 * of current_offset */
2177 while (mxf->current_edit_unit >= 0) {
2178 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2179 NULL, &next_ofs, 0) < 0)
2180 return -1;
2181
2182 if (next_ofs <= last_ofs) {
2183 /* large next_ofs didn't change or current_edit_unit wrapped
2184 * around this fixes the infinite loop on zzuf3.mxf */
2185 av_log(mxf->fc, AV_LOG_ERROR,
2186 "next_ofs didn't change. not deriving packet timestamps\n");
2187 return -1;
2188 }
2189
2190 if (next_ofs > current_offset)
2191 break;
2192
2193 last_ofs = next_ofs;
2194 mxf->current_edit_unit++;
2195 }
2196
2197 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2198 * may lack IndexEntryArrays */
2199 if (mxf->current_edit_unit < 0)
2200 return -1;
2201
2202 return next_ofs;
2203 }
2204
2205 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2206 uint64_t *sample_count)
2207 {
2208 int i, total = 0, size = 0;
2209 AVStream *st = mxf->fc->streams[stream_index];
2210 MXFTrack *track = st->priv_data;
2211 AVRational time_base = av_inv_q(track->edit_rate);
2212 AVRational sample_rate = av_inv_q(st->time_base);
2213 const MXFSamplesPerFrame *spf = NULL;
2214
2215 if ((sample_rate.num / sample_rate.den) == 48000)
2216 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2217 if (!spf) {
2218 int remainder = (sample_rate.num * time_base.num) %
2219 (time_base.den * sample_rate.den);
2220 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2221 av_mul_q(sample_rate, time_base)));
2222 if (remainder)
2223 av_log(mxf->fc, AV_LOG_WARNING,
2224 "seeking detected on stream #%d with time base (%d/%d) and "
2225 "sample rate (%d/%d), audio pts won't be accurate.\n",
2226 stream_index, time_base.num, time_base.den,
2227 sample_rate.num, sample_rate.den);
2228 return 0;
2229 }
2230
2231 while (spf->samples_per_frame[size]) {
2232 total += spf->samples_per_frame[size];
2233 size++;
2234 }
2235
2236 if (!size)
2237 return 0;
2238
2239 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2240 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2241 *sample_count += spf->samples_per_frame[i];
2242 }
2243
2244 return 0;
2245 }
2246
2247 static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2248 AVPacket *pkt)
2249 {
2250 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2251 int64_t bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2252
2253 pkt->pts = track->sample_count;
2254
2255 if (codec->channels <= 0 || codec->channels * bits_per_sample < 8)
2256 return AVERROR_INVALIDDATA;
2257
2258 track->sample_count += pkt->size / (codec->channels * bits_per_sample / 8);
2259 return 0;
2260 }
2261
2262 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2263 {
2264 KLVPacket klv;
2265 MXFContext *mxf = s->priv_data;
2266 int ret;
2267
2268 while (!s->pb->eof_reached) {
2269 if ((ret = klv_read_packet(&klv, s->pb)) < 0)
2270 return ret;
2271 PRINT_KEY(s, "read packet", klv.key);
2272 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2273 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2274 ret = mxf_decrypt_triplet(s, pkt, &klv);
2275 if (ret < 0) {
2276 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2277 return ret;
2278 }
2279 return 0;
2280 }
2281 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2282 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2283 int index = mxf_get_stream_index(s, &klv);
2284 int64_t next_ofs, next_klv;
2285 AVStream *st;
2286 MXFTrack *track;
2287 AVCodecContext *codec;
2288
2289 if (index < 0) {
2290 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2291 goto skip;
2292 }
2293
2294 st = s->streams[index];
2295 track = st->priv_data;
2296
2297 if (s->streams[index]->discard == AVDISCARD_ALL)
2298 goto skip;
2299
2300 next_klv = avio_tell(s->pb) + klv.length;
2301 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2302
2303 if (next_ofs >= 0 && next_klv > next_ofs) {
2304 /* if this check is hit then it's possible OPAtom was treated
2305 * as OP1a truncate the packet since it's probably very large
2306 * (>2 GiB is common) */
2307 avpriv_request_sample(s,
2308 "OPAtom misinterpreted as OP1a?"
2309 "KLV for edit unit %i extending into "
2310 "next edit unit",
2311 mxf->current_edit_unit);
2312 klv.length = next_ofs - avio_tell(s->pb);
2313 }
2314
2315 /* check for 8 channels AES3 element */
2316 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2317 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2318 pkt, klv.length);
2319 if (ret < 0) {
2320 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2321 return ret;
2322 }
2323 } else {
2324 ret = av_get_packet(s->pb, pkt, klv.length);
2325 if (ret < 0)
2326 return ret;
2327 }
2328 pkt->stream_index = index;
2329 pkt->pos = klv.offset;
2330
2331 codec = s->streams[index]->codec;
2332
2333 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2334 /* mxf->current_edit_unit good - see if we have an
2335 * index table to derive timestamps from */
2336 MXFIndexTable *t = &mxf->index_tables[0];
2337
2338 if (mxf->nb_index_tables >= 1 &&
2339 mxf->current_edit_unit < t->nb_ptses) {
2340 pkt->dts = mxf->current_edit_unit + t->first_dts;
2341 pkt->pts = t->ptses[mxf->current_edit_unit];
2342 } else if (track->intra_only) {
2343 /* intra-only -> PTS = EditUnit.
2344 * let utils.c figure out DTS since it can be
2345 * < PTS if low_delay = 0 (Sony IMX30) */
2346 pkt->pts = mxf->current_edit_unit;
2347 }
2348 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2349 ret = mxf_set_audio_pts(mxf, codec, pkt);
2350 if (ret < 0)
2351 return ret;
2352 }
2353
2354 /* seek for truncated packets */
2355 avio_seek(s->pb, next_klv, SEEK_SET);
2356
2357 return 0;
2358 } else
2359 skip:
2360 avio_skip(s->pb, klv.length);
2361 }
2362 return AVERROR_EOF;
2363 }
2364
2365 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2366 {
2367 MXFContext *mxf = s->priv_data;
2368 int ret, size;
2369 int64_t ret64, pos, next_pos;
2370 AVStream *st;
2371 MXFIndexTable *t;
2372 int edit_units;
2373
2374 if (mxf->op != OPAtom)
2375 return mxf_read_packet_old(s, pkt);
2376
2377 /* OPAtom - clip wrapped demuxing */
2378 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2379 st = s->streams[0];
2380 t = &mxf->index_tables[0];
2381
2382 if (mxf->current_edit_unit >= st->duration)
2383 return AVERROR_EOF;
2384
2385 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2386
2387 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2388 return ret;
2389
2390 /* compute size by finding the next edit unit or the end of the essence container
2391 * not pretty, but it works */
2392 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2393 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2394 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2395 return AVERROR_INVALIDDATA;
2396 }
2397
2398 if ((size = next_pos - pos) <= 0) {
2399 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2400 return AVERROR_INVALIDDATA;
2401 }
2402
2403 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2404 return ret64;
2405
2406 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2407 return ret < 0 ? ret : AVERROR_EOF;
2408
2409 pkt->stream_index = 0;
2410
2411 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2412 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2413 pkt->dts = mxf->current_edit_unit + t->first_dts;
2414 pkt->pts = t->ptses[mxf->current_edit_unit];
2415 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2416 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2417 if (ret < 0)
2418 return ret;
2419 }
2420
2421 mxf->current_edit_unit += edit_units;
2422
2423 return 0;
2424 }
2425
2426
2427 static int mxf_read_close(AVFormatContext *s)
2428 {
2429 MXFContext *mxf = s->priv_data;
2430 MXFIndexTableSegment *seg;
2431 int i;
2432
2433 av_freep(&mxf->packages_refs);
2434
2435 for (i = 0; i < s->nb_streams; i++)
2436 s->streams[i]->priv_data = NULL;
2437
2438 for (i = 0; i < mxf->metadata_sets_count; i++) {
2439 switch (mxf->metadata_sets[i]->type) {
2440 case Descriptor:
2441 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2442 break;
2443 case MultipleDescriptor:
2444 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2445 break;
2446 case Sequence:
2447 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2448 break;
2449 case SourcePackage:
2450 case MaterialPackage:
2451 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2452 break;
2453 case IndexTableSegment:
2454 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2455 av_freep(&seg->temporal_offset_entries);
2456 av_freep(&seg->flag_entries);
2457 av_freep(&seg->stream_offset_entries);
2458 break;
2459 default:
2460 break;
2461 }
2462 av_freep(&mxf->metadata_sets[i]);
2463 }
2464 av_freep(&mxf->partitions);
2465 av_freep(&mxf->metadata_sets);
2466 av_freep(&mxf->aesc);
2467 av_freep(&mxf->local_tags);
2468
2469 for (i = 0; i < mxf->nb_index_tables; i++) {
2470 av_freep(&mxf->index_tables[i].segments);
2471 av_freep(&mxf->index_tables[i].ptses);
2472 av_freep(&mxf->index_tables[i].fake_index);
2473 }
2474 av_freep(&mxf->index_tables);
2475
2476 return 0;
2477 }
2478
2479 static int mxf_probe(AVProbeData *p) {
2480 uint8_t *bufp = p->buf;
2481 uint8_t *end = p->buf + p->buf_size;
2482
2483 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2484 return 0;
2485
2486 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2487 end -= sizeof(mxf_header_partition_pack_key);
2488 for (; bufp < end; bufp++) {
2489 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2490 return AVPROBE_SCORE_MAX;
2491 }
2492 return 0;
2493 }
2494
2495 /* rudimentary byte seek */
2496 /* XXX: use MXF Index */
2497 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2498 {
2499 AVStream *st = s->streams[stream_index];
2500 int64_t seconds;
2501 MXFContext* mxf = s->priv_data;
2502 int64_t seekpos;
2503 int i, ret;
2504 MXFIndexTable *t;
2505 MXFTrack *source_track = st->priv_data;
2506
2507 /* if audio then truncate sample_time to EditRate */
2508 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2509 sample_time = av_rescale_q(sample_time, st->time_base,
2510 av_inv_q(source_track->edit_rate));
2511
2512 if (mxf->nb_index_tables <= 0) {
2513 if (!s->bit_rate)
2514 return AVERROR_INVALIDDATA;
2515 if (sample_time < 0)
2516 sample_time = 0;
2517 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2518
2519 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2520 if (seekpos < 0)
2521 return seekpos;
2522
2523 ff_update_cur_dts(s, st, sample_time);
2524 mxf->current_edit_unit = sample_time;
2525 } else {
2526 t = &mxf->index_tables[0];
2527
2528 /* clamp above zero, else ff_index_search_timestamp() returns negative
2529 * this also means we allow seeking before the start */
2530 sample_time = FFMAX(sample_time, 0);
2531
2532 if (t->fake_index) {
2533 /* behave as if we have a proper index */
2534 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2535 return sample_time;
2536 } else {
2537 /* no IndexEntryArray (one or more CBR segments)
2538 * make sure we don't seek past the end */
2539 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2540 }
2541
2542 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2543 return ret;
2544
2545 ff_update_cur_dts(s, st, sample_time);
2546 mxf->current_edit_unit = sample_time;
2547 avio_seek(s->pb, seekpos, SEEK_SET);
2548 }
2549
2550 // Update all tracks sample count
2551 for (i = 0; i < s->nb_streams; i++) {
2552 AVStream *cur_st = s->streams[i];
2553 MXFTrack *cur_track = cur_st->priv_data;
2554 uint64_t current_sample_count = 0;
2555 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2556 ret = mxf_compute_sample_count(mxf, i, &current_sample_count);
2557 if (ret < 0)
2558 return ret;
2559
2560 cur_track->sample_count = current_sample_count;
2561 }
2562 }
2563 return 0;
2564 }
2565
2566 AVInputFormat ff_mxf_demuxer = {
2567 .name = "mxf",
2568 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2569 .priv_data_size = sizeof(MXFContext),
2570 .read_probe = mxf_probe,
2571 .read_header = mxf_read_header,
2572 .read_packet = mxf_read_packet,
2573 .read_close = mxf_read_close,
2574 .read_seek = mxf_read_seek,
2575 };