158e866d2357c6ed96196c1189bea76f6cc71b9a
[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 } 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 #define MXF_TFF 1
138 #define MXF_BFF 2
139 int field_dominance;
140 int channels;
141 int bits_per_sample;
142 unsigned int component_depth;
143 unsigned int horiz_subsampling;
144 unsigned int vert_subsampling;
145 UID *sub_descriptors_refs;
146 int sub_descriptors_count;
147 int linked_track_id;
148 uint8_t *extradata;
149 int extradata_size;
150 enum AVPixelFormat pix_fmt;
151 } MXFDescriptor;
152
153 typedef struct {
154 UID uid;
155 enum MXFMetadataSetType type;
156 int edit_unit_byte_count;
157 int index_sid;
158 int body_sid;
159 AVRational index_edit_rate;
160 uint64_t index_start_position;
161 uint64_t index_duration;
162 int8_t *temporal_offset_entries;
163 int *flag_entries;
164 uint64_t *stream_offset_entries;
165 int nb_index_entries;
166 } MXFIndexTableSegment;
167
168 typedef struct {
169 UID uid;
170 enum MXFMetadataSetType type;
171 UID package_uid;
172 UID *tracks_refs;
173 int tracks_count;
174 MXFDescriptor *descriptor; /* only one */
175 UID descriptor_ref;
176 } MXFPackage;
177
178 typedef struct {
179 UID uid;
180 enum MXFMetadataSetType type;
181 } MXFMetadataSet;
182
183 /* decoded index table */
184 typedef struct {
185 int index_sid;
186 int body_sid;
187 int nb_ptses; /* number of PTSes or total duration of index */
188 int64_t first_dts; /* DTS = EditUnit + first_dts */
189 int64_t *ptses; /* maps EditUnit -> PTS */
190 int nb_segments;
191 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
192 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
193 } MXFIndexTable;
194
195 typedef struct {
196 MXFPartition *partitions;
197 unsigned partitions_count;
198 MXFOP op;
199 UID *packages_refs;
200 int packages_count;
201 MXFMetadataSet **metadata_sets;
202 int metadata_sets_count;
203 AVFormatContext *fc;
204 struct AVAES *aesc;
205 uint8_t *local_tags;
206 int local_tags_count;
207 uint64_t footer_partition;
208 KLVPacket current_klv_data;
209 int current_klv_index;
210 int run_in;
211 MXFPartition *current_partition;
212 int parsing_backward;
213 int64_t last_forward_tell;
214 int last_forward_partition;
215 int current_edit_unit;
216 int nb_index_tables;
217 MXFIndexTable *index_tables;
218 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
219 } MXFContext;
220
221 enum MXFWrappingScheme {
222 Frame,
223 Clip,
224 };
225
226 /* NOTE: klv_offset is not set (-1) for local keys */
227 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
228
229 typedef struct {
230 const UID key;
231 MXFMetadataReadFunc *read;
232 int ctx_size;
233 enum MXFMetadataSetType type;
234 } MXFMetadataReadTableEntry;
235
236 /* partial keys to match */
237 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
238 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
239 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
240 static const uint8_t mxf_system_item_key[] = { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0D,0x01,0x03,0x01,0x04 };
241 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
242 /* complete keys to match */
243 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 };
244 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
245 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
246 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
247
248 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
249
250 static int64_t klv_decode_ber_length(AVIOContext *pb)
251 {
252 uint64_t size = avio_r8(pb);
253 if (size & 0x80) { /* long form */
254 int bytes_num = size & 0x7f;
255 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
256 if (bytes_num > 8)
257 return AVERROR_INVALIDDATA;
258 size = 0;
259 while (bytes_num--)
260 size = size << 8 | avio_r8(pb);
261 }
262 return size;
263 }
264
265 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
266 {
267 int i, b;
268 for (i = 0; i < size && !pb->eof_reached; i++) {
269 b = avio_r8(pb);
270 if (b == key[0])
271 i = 0;
272 else if (b != key[i])
273 i = -1;
274 }
275 return i == size;
276 }
277
278 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
279 {
280 if (!mxf_read_sync(pb, mxf_klv_key, 4))
281 return AVERROR_INVALIDDATA;
282 klv->offset = avio_tell(pb) - 4;
283 memcpy(klv->key, mxf_klv_key, 4);
284 avio_read(pb, klv->key + 4, 12);
285 klv->length = klv_decode_ber_length(pb);
286 return klv->length == -1 ? -1 : 0;
287 }
288
289 static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
290 {
291 int i;
292
293 for (i = 0; i < s->nb_streams; i++) {
294 MXFTrack *track = s->streams[i]->priv_data;
295 /* SMPTE 379M 7.3 */
296 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
297 return i;
298 }
299 /* return 0 if only one stream, for OP Atom files with 0 as track number */
300 return s->nb_streams == 1 ? 0 : -1;
301 }
302
303 /* XXX: use AVBitStreamFilter */
304 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
305 {
306 const uint8_t *buf_ptr, *end_ptr;
307 uint8_t *data_ptr;
308 int i;
309
310 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
311 return AVERROR_INVALIDDATA;
312 length = av_get_packet(pb, pkt, length);
313 if (length < 0)
314 return length;
315 data_ptr = pkt->data;
316 end_ptr = pkt->data + length;
317 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
318 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
319 for (i = 0; i < st->codec->channels; i++) {
320 uint32_t sample = bytestream_get_le32(&buf_ptr);
321 if (st->codec->bits_per_coded_sample == 24)
322 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
323 else
324 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
325 }
326 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
327 }
328 av_shrink_packet(pkt, data_ptr - pkt->data);
329 return 0;
330 }
331
332 static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
333 {
334 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
335 MXFContext *mxf = s->priv_data;
336 AVIOContext *pb = s->pb;
337 int64_t end = avio_tell(pb) + klv->length;
338 int64_t size;
339 uint64_t orig_size;
340 uint64_t plaintext_size;
341 uint8_t ivec[16];
342 uint8_t tmpbuf[16];
343 int index;
344
345 if (!mxf->aesc && s->key && s->keylen == 16) {
346 mxf->aesc = av_aes_alloc();
347 if (!mxf->aesc)
348 return AVERROR(ENOMEM);
349 av_aes_init(mxf->aesc, s->key, 128, 1);
350 }
351 // crypto context
352 avio_skip(pb, klv_decode_ber_length(pb));
353 // plaintext offset
354 klv_decode_ber_length(pb);
355 plaintext_size = avio_rb64(pb);
356 // source klv key
357 klv_decode_ber_length(pb);
358 avio_read(pb, klv->key, 16);
359 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
360 return AVERROR_INVALIDDATA;
361 index = mxf_get_stream_index(s, klv);
362 if (index < 0)
363 return AVERROR_INVALIDDATA;
364 // source size
365 klv_decode_ber_length(pb);
366 orig_size = avio_rb64(pb);
367 if (orig_size < plaintext_size)
368 return AVERROR_INVALIDDATA;
369 // enc. code
370 size = klv_decode_ber_length(pb);
371 if (size < 32 || size - 32 < orig_size)
372 return AVERROR_INVALIDDATA;
373 avio_read(pb, ivec, 16);
374 avio_read(pb, tmpbuf, 16);
375 if (mxf->aesc)
376 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
377 if (memcmp(tmpbuf, checkv, 16))
378 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
379 size -= 32;
380 size = av_get_packet(pb, pkt, size);
381 if (size < 0)
382 return size;
383 else if (size < plaintext_size)
384 return AVERROR_INVALIDDATA;
385 size -= plaintext_size;
386 if (mxf->aesc)
387 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
388 &pkt->data[plaintext_size], size >> 4, ivec, 1);
389 av_shrink_packet(pkt, orig_size);
390 pkt->stream_index = index;
391 avio_skip(pb, end - avio_tell(pb));
392 return 0;
393 }
394
395 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
396 {
397 MXFContext *mxf = arg;
398 int item_num = avio_rb32(pb);
399 int item_len = avio_rb32(pb);
400
401 if (item_len != 18) {
402 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
403 return AVERROR_PATCHWELCOME;
404 }
405 if (item_num > UINT_MAX / item_len)
406 return AVERROR_INVALIDDATA;
407 mxf->local_tags_count = item_num;
408 mxf->local_tags = av_malloc(item_num*item_len);
409 if (!mxf->local_tags)
410 return AVERROR(ENOMEM);
411 avio_read(pb, mxf->local_tags, item_num*item_len);
412 return 0;
413 }
414
415 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
416 {
417 MXFContext *mxf = arg;
418 MXFPartition *partition;
419 UID op;
420 uint64_t footer_partition;
421 uint32_t nb_essence_containers;
422 int err;
423
424 if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
425 sizeof(*mxf->partitions))) < 0) {
426 mxf->partitions_count = 0;
427 return err;
428 }
429
430 if (mxf->parsing_backward) {
431 /* insert the new partition pack in the middle
432 * this makes the entries in mxf->partitions sorted by offset */
433 memmove(&mxf->partitions[mxf->last_forward_partition+1],
434 &mxf->partitions[mxf->last_forward_partition],
435 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
436 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
437 } else {
438 mxf->last_forward_partition++;
439 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
440 }
441
442 memset(partition, 0, sizeof(*partition));
443 mxf->partitions_count++;
444 partition->pack_length = avio_tell(pb) - klv_offset + size;
445
446 switch(uid[13]) {
447 case 2:
448 partition->type = Header;
449 break;
450 case 3:
451 partition->type = BodyPartition;
452 break;
453 case 4:
454 partition->type = Footer;
455 break;
456 default:
457 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
458 return AVERROR_INVALIDDATA;
459 }
460
461 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
462 partition->closed = partition->type == Footer || !(uid[14] & 1);
463 partition->complete = uid[14] > 2;
464 avio_skip(pb, 4);
465 partition->kag_size = avio_rb32(pb);
466 partition->this_partition = avio_rb64(pb);
467 partition->previous_partition = avio_rb64(pb);
468 footer_partition = avio_rb64(pb);
469 partition->header_byte_count = avio_rb64(pb);
470 partition->index_byte_count = avio_rb64(pb);
471 partition->index_sid = avio_rb32(pb);
472 avio_skip(pb, 8);
473 partition->body_sid = avio_rb32(pb);
474 avio_read(pb, op, sizeof(UID));
475 nb_essence_containers = avio_rb32(pb);
476
477 /* some files don'thave FooterPartition set in every partition */
478 if (footer_partition) {
479 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
480 av_log(mxf->fc, AV_LOG_ERROR,
481 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
482 mxf->footer_partition, footer_partition);
483 } else {
484 mxf->footer_partition = footer_partition;
485 }
486 }
487
488 av_dlog(mxf->fc,
489 "PartitionPack: ThisPartition = 0x%"PRIX64
490 ", PreviousPartition = 0x%"PRIX64", "
491 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
492 partition->this_partition,
493 partition->previous_partition, footer_partition,
494 partition->index_sid, partition->body_sid);
495
496 /* sanity check PreviousPartition if set */
497 if (partition->previous_partition &&
498 mxf->run_in + partition->previous_partition >= klv_offset) {
499 av_log(mxf->fc, AV_LOG_ERROR,
500 "PreviousPartition points to this partition or forward\n");
501 return AVERROR_INVALIDDATA;
502 }
503
504 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
505 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
506 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
507 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
508 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
509 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
510 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
511 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
512 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
513 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
514 else if (op[12] == 0x10) {
515 /* SMPTE 390m: "There shall be exactly one essence container"
516 * The following block deals with files that violate this, namely:
517 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
518 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
519 if (nb_essence_containers != 1) {
520 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
521
522 /* only nag once */
523 if (!mxf->op)
524 av_log(mxf->fc, AV_LOG_WARNING,
525 "\"OPAtom\" with %u ECs - assuming %s\n",
526 nb_essence_containers,
527 op == OP1a ? "OP1a" : "OPAtom");
528
529 mxf->op = op;
530 } else
531 mxf->op = OPAtom;
532 } else {
533 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
534 mxf->op = OP1a;
535 }
536
537 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
538 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %i - guessing ", partition->kag_size);
539
540 if (mxf->op == OPSonyOpt)
541 partition->kag_size = 512;
542 else
543 partition->kag_size = 1;
544
545 av_log(mxf->fc, AV_LOG_WARNING, "%i\n", partition->kag_size);
546 }
547
548 return 0;
549 }
550
551 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
552 {
553 int err;
554
555 if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
556 sizeof(*mxf->metadata_sets))) < 0) {
557 mxf->metadata_sets_count = 0;
558 return err;
559 }
560 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
561 mxf->metadata_sets_count++;
562 return 0;
563 }
564
565 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
566 {
567 MXFCryptoContext *cryptocontext = arg;
568 if (size != 16)
569 return AVERROR_INVALIDDATA;
570 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
571 avio_read(pb, cryptocontext->source_container_ul, 16);
572 return 0;
573 }
574
575 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
576 {
577 MXFContext *mxf = arg;
578 switch (tag) {
579 case 0x1901:
580 mxf->packages_count = avio_rb32(pb);
581 if (mxf->packages_count >= UINT_MAX / sizeof(UID))
582 return AVERROR_INVALIDDATA;
583 mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
584 if (!mxf->packages_refs)
585 return AVERROR(ENOMEM);
586 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
587 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
588 break;
589 }
590 return 0;
591 }
592
593 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
594 {
595 MXFStructuralComponent *source_clip = arg;
596 switch(tag) {
597 case 0x0202:
598 source_clip->duration = avio_rb64(pb);
599 break;
600 case 0x1201:
601 source_clip->start_position = avio_rb64(pb);
602 break;
603 case 0x1101:
604 /* UMID, only get last 16 bytes */
605 avio_skip(pb, 16);
606 avio_read(pb, source_clip->source_package_uid, 16);
607 break;
608 case 0x1102:
609 source_clip->source_track_id = avio_rb32(pb);
610 break;
611 }
612 return 0;
613 }
614
615 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
616 {
617 MXFPackage *package = arg;
618 switch(tag) {
619 case 0x4403:
620 package->tracks_count = avio_rb32(pb);
621 if (package->tracks_count >= UINT_MAX / sizeof(UID))
622 return AVERROR_INVALIDDATA;
623 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
624 if (!package->tracks_refs)
625 return AVERROR(ENOMEM);
626 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
627 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
628 break;
629 }
630 return 0;
631 }
632
633 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
634 {
635 MXFTrack *track = arg;
636 switch(tag) {
637 case 0x4801:
638 track->track_id = avio_rb32(pb);
639 break;
640 case 0x4804:
641 avio_read(pb, track->track_number, 4);
642 break;
643 case 0x4B01:
644 track->edit_rate.num = avio_rb32(pb);
645 track->edit_rate.den = avio_rb32(pb);
646 break;
647 case 0x4803:
648 avio_read(pb, track->sequence_ref, 16);
649 break;
650 }
651 return 0;
652 }
653
654 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
655 {
656 MXFSequence *sequence = arg;
657 switch(tag) {
658 case 0x0202:
659 sequence->duration = avio_rb64(pb);
660 break;
661 case 0x0201:
662 avio_read(pb, sequence->data_definition_ul, 16);
663 break;
664 case 0x1001:
665 sequence->structural_components_count = avio_rb32(pb);
666 if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
667 return AVERROR_INVALIDDATA;
668 sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
669 if (!sequence->structural_components_refs)
670 return AVERROR(ENOMEM);
671 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
672 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
673 break;
674 }
675 return 0;
676 }
677
678 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
679 {
680 MXFPackage *package = arg;
681 switch(tag) {
682 case 0x4403:
683 package->tracks_count = avio_rb32(pb);
684 if (package->tracks_count >= UINT_MAX / sizeof(UID))
685 return AVERROR_INVALIDDATA;
686 package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
687 if (!package->tracks_refs)
688 return AVERROR(ENOMEM);
689 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
690 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
691 break;
692 case 0x4401:
693 /* UMID, only get last 16 bytes */
694 avio_skip(pb, 16);
695 avio_read(pb, package->package_uid, 16);
696 break;
697 case 0x4701:
698 avio_read(pb, package->descriptor_ref, 16);
699 break;
700 }
701 return 0;
702 }
703
704 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
705 {
706 int i, length;
707
708 segment->nb_index_entries = avio_rb32(pb);
709 if (!segment->nb_index_entries)
710 return 0;
711 else if (segment->nb_index_entries < 0 ||
712 segment->nb_index_entries >
713 (INT_MAX / sizeof(*segment->stream_offset_entries)))
714 return AVERROR(ENOMEM);
715
716 length = avio_rb32(pb);
717
718 segment->temporal_offset_entries = av_mallocz(segment->nb_index_entries *
719 sizeof(*segment->temporal_offset_entries));
720 segment->flag_entries = av_mallocz(segment->nb_index_entries *
721 sizeof(*segment->flag_entries));
722 segment->stream_offset_entries = av_mallocz(segment->nb_index_entries *
723 sizeof(*segment->stream_offset_entries));
724
725 if (!segment->flag_entries || !segment->stream_offset_entries ||
726 !segment->temporal_offset_entries) {
727 av_freep(&segment->flag_entries);
728 av_freep(&segment->stream_offset_entries);
729 av_freep(&segment->temporal_offset_entries);
730 return AVERROR(ENOMEM);
731 }
732
733 for (i = 0; i < segment->nb_index_entries; i++) {
734 segment->temporal_offset_entries[i] = avio_r8(pb);
735 avio_r8(pb); /* KeyFrameOffset */
736 segment->flag_entries[i] = avio_r8(pb);
737 segment->stream_offset_entries[i] = avio_rb64(pb);
738 avio_skip(pb, length - 11);
739 }
740 return 0;
741 }
742
743 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
744 {
745 MXFIndexTableSegment *segment = arg;
746 switch(tag) {
747 case 0x3F05:
748 segment->edit_unit_byte_count = avio_rb32(pb);
749 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
750 break;
751 case 0x3F06:
752 segment->index_sid = avio_rb32(pb);
753 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
754 break;
755 case 0x3F07:
756 segment->body_sid = avio_rb32(pb);
757 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
758 break;
759 case 0x3F0A:
760 av_dlog(NULL, "IndexEntryArray found\n");
761 return mxf_read_index_entry_array(pb, segment);
762 case 0x3F0B:
763 segment->index_edit_rate.num = avio_rb32(pb);
764 segment->index_edit_rate.den = avio_rb32(pb);
765 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
766 segment->index_edit_rate.den);
767 break;
768 case 0x3F0C:
769 segment->index_start_position = avio_rb64(pb);
770 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
771 break;
772 case 0x3F0D:
773 segment->index_duration = avio_rb64(pb);
774 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
775 break;
776 }
777 return 0;
778 }
779
780 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
781 {
782 int code, value, ofs = 0;
783 char layout[16] = {0};
784
785 do {
786 code = avio_r8(pb);
787 value = avio_r8(pb);
788 av_dlog(NULL, "pixel layout: code %#x\n", code);
789
790 if (ofs < 16) {
791 layout[ofs++] = code;
792 layout[ofs++] = value;
793 }
794 } while (code != 0); /* SMPTE 377M E.2.46 */
795
796 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
797 }
798
799 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
800 {
801 MXFDescriptor *descriptor = arg;
802 descriptor->pix_fmt = AV_PIX_FMT_NONE;
803 switch(tag) {
804 case 0x3F01:
805 descriptor->sub_descriptors_count = avio_rb32(pb);
806 if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
807 return AVERROR_INVALIDDATA;
808 descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
809 if (!descriptor->sub_descriptors_refs)
810 return AVERROR(ENOMEM);
811 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
812 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
813 break;
814 case 0x3004:
815 avio_read(pb, descriptor->essence_container_ul, 16);
816 break;
817 case 0x3006:
818 descriptor->linked_track_id = avio_rb32(pb);
819 break;
820 case 0x3201: /* PictureEssenceCoding */
821 avio_read(pb, descriptor->essence_codec_ul, 16);
822 break;
823 case 0x3203:
824 descriptor->width = avio_rb32(pb);
825 break;
826 case 0x3202:
827 descriptor->height = avio_rb32(pb);
828 break;
829 case 0x320C:
830 descriptor->frame_layout = avio_r8(pb);
831 break;
832 case 0x320E:
833 descriptor->aspect_ratio.num = avio_rb32(pb);
834 descriptor->aspect_ratio.den = avio_rb32(pb);
835 break;
836 case 0x3212:
837 descriptor->field_dominance = avio_r8(pb);
838 break;
839 case 0x3301:
840 descriptor->component_depth = avio_rb32(pb);
841 break;
842 case 0x3302:
843 descriptor->horiz_subsampling = avio_rb32(pb);
844 break;
845 case 0x3308:
846 descriptor->vert_subsampling = avio_rb32(pb);
847 break;
848 case 0x3D03:
849 descriptor->sample_rate.num = avio_rb32(pb);
850 descriptor->sample_rate.den = avio_rb32(pb);
851 break;
852 case 0x3D06: /* SoundEssenceCompression */
853 avio_read(pb, descriptor->essence_codec_ul, 16);
854 break;
855 case 0x3D07:
856 descriptor->channels = avio_rb32(pb);
857 break;
858 case 0x3D01:
859 descriptor->bits_per_sample = avio_rb32(pb);
860 break;
861 case 0x3401:
862 mxf_read_pixel_layout(pb, descriptor);
863 break;
864 default:
865 /* Private uid used by SONY C0023S01.mxf */
866 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
867 av_free(descriptor->extradata);
868 descriptor->extradata_size = 0;
869 descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
870 if (!descriptor->extradata)
871 return AVERROR(ENOMEM);
872 descriptor->extradata_size = size;
873 avio_read(pb, descriptor->extradata, size);
874 }
875 break;
876 }
877 return 0;
878 }
879
880 /*
881 * Match an uid independently of the version byte and up to len common bytes
882 * Returns: boolean
883 */
884 static int mxf_match_uid(const UID key, const UID uid, int len)
885 {
886 int i;
887 for (i = 0; i < len; i++) {
888 if (i != 7 && key[i] != uid[i])
889 return 0;
890 }
891 return 1;
892 }
893
894 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
895 {
896 while (uls->uid[0]) {
897 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
898 break;
899 uls++;
900 }
901 return uls;
902 }
903
904 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
905 {
906 int i;
907
908 if (!strong_ref)
909 return NULL;
910 for (i = 0; i < mxf->metadata_sets_count; i++) {
911 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
912 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
913 return mxf->metadata_sets[i];
914 }
915 }
916 return NULL;
917 }
918
919 static const MXFCodecUL mxf_picture_essence_container_uls[] = {
920 // video essence container uls
921 { { 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 */
922 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
923 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
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 /* EC ULs for intra-only formats */
928 static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
929 { { 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 */
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 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
934 static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
935 { { 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 */
936 { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
937 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
938 };
939
940 static const MXFCodecUL mxf_sound_essence_container_uls[] = {
941 // sound essence container uls
942 { { 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 */
943 { { 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 */
944 { { 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 */
945 { { 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 */
946 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
947 };
948
949 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
950 {
951 int i, j, nb_segments = 0;
952 MXFIndexTableSegment **unsorted_segments;
953 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
954
955 /* count number of segments, allocate arrays and copy unsorted segments */
956 for (i = 0; i < mxf->metadata_sets_count; i++)
957 if (mxf->metadata_sets[i]->type == IndexTableSegment)
958 nb_segments++;
959
960 if (!nb_segments)
961 return AVERROR_INVALIDDATA;
962
963 *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
964 unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
965 if (!*sorted_segments || !unsorted_segments) {
966 av_freep(sorted_segments);
967 av_free(unsorted_segments);
968 return AVERROR(ENOMEM);
969 }
970
971 for (i = j = 0; i < mxf->metadata_sets_count; i++)
972 if (mxf->metadata_sets[i]->type == IndexTableSegment)
973 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
974
975 *nb_sorted_segments = 0;
976
977 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
978 for (i = 0; i < nb_segments; i++) {
979 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
980 uint64_t best_index_duration = 0;
981
982 for (j = 0; j < nb_segments; j++) {
983 MXFIndexTableSegment *s = unsorted_segments[j];
984
985 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
986 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
987 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
988 */
989 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
990 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
991 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
992 best = j;
993 best_body_sid = s->body_sid;
994 best_index_sid = s->index_sid;
995 best_index_start = s->index_start_position;
996 best_index_duration = s->index_duration;
997 }
998 }
999
1000 /* no suitable entry found -> we're done */
1001 if (best == -1)
1002 break;
1003
1004 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1005 last_body_sid = best_body_sid;
1006 last_index_sid = best_index_sid;
1007 last_index_start = best_index_start;
1008 }
1009
1010 av_free(unsorted_segments);
1011
1012 return 0;
1013 }
1014
1015 /**
1016 * Computes the absolute file offset of the given essence container offset
1017 */
1018 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1019 {
1020 int x;
1021 int64_t offset_in = offset; /* for logging */
1022
1023 for (x = 0; x < mxf->partitions_count; x++) {
1024 MXFPartition *p = &mxf->partitions[x];
1025
1026 if (p->body_sid != body_sid)
1027 continue;
1028
1029 if (offset < p->essence_length || !p->essence_length) {
1030 *offset_out = p->essence_offset + offset;
1031 return 0;
1032 }
1033
1034 offset -= p->essence_length;
1035 }
1036
1037 av_log(mxf->fc, AV_LOG_ERROR,
1038 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1039 offset_in, body_sid);
1040
1041 return AVERROR_INVALIDDATA;
1042 }
1043
1044 /**
1045 * Returns the end position of the essence container with given BodySID, or zero if unknown
1046 */
1047 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1048 {
1049 int x;
1050 int64_t ret = 0;
1051
1052 for (x = 0; x < mxf->partitions_count; x++) {
1053 MXFPartition *p = &mxf->partitions[x];
1054
1055 if (p->body_sid != body_sid)
1056 continue;
1057
1058 if (!p->essence_length)
1059 return 0;
1060
1061 ret = p->essence_offset + p->essence_length;
1062 }
1063
1064 return ret;
1065 }
1066
1067 /* EditUnit -> absolute offset */
1068 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)
1069 {
1070 int i;
1071 int64_t offset_temp = 0;
1072
1073 for (i = 0; i < index_table->nb_segments; i++) {
1074 MXFIndexTableSegment *s = index_table->segments[i];
1075
1076 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1077
1078 if (edit_unit < s->index_start_position + s->index_duration) {
1079 int64_t index = edit_unit - s->index_start_position;
1080
1081 if (s->edit_unit_byte_count)
1082 offset_temp += s->edit_unit_byte_count * index;
1083 else if (s->nb_index_entries) {
1084 if (s->nb_index_entries == 2 * s->index_duration + 1)
1085 index *= 2; /* Avid index */
1086
1087 if (index < 0 || index >= s->nb_index_entries) {
1088 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1089 index_table->index_sid, s->index_start_position);
1090 return AVERROR_INVALIDDATA;
1091 }
1092
1093 offset_temp = s->stream_offset_entries[index];
1094 } else {
1095 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1096 index_table->index_sid, s->index_start_position);
1097 return AVERROR_INVALIDDATA;
1098 }
1099
1100 if (edit_unit_out)
1101 *edit_unit_out = edit_unit;
1102
1103 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1104 } else {
1105 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1106 offset_temp += s->edit_unit_byte_count * s->index_duration;
1107 }
1108 }
1109
1110 if (nag)
1111 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);
1112
1113 return AVERROR_INVALIDDATA;
1114 }
1115
1116 static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1117 {
1118 int i, j, x;
1119 int8_t max_temporal_offset = -128;
1120
1121 /* first compute how many entries we have */
1122 for (i = 0; i < index_table->nb_segments; i++) {
1123 MXFIndexTableSegment *s = index_table->segments[i];
1124
1125 if (!s->nb_index_entries) {
1126 index_table->nb_ptses = 0;
1127 return 0; /* no TemporalOffsets */
1128 }
1129
1130 index_table->nb_ptses += s->index_duration;
1131 }
1132
1133 /* paranoid check */
1134 if (index_table->nb_ptses <= 0)
1135 return 0;
1136
1137 if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1138 return AVERROR(ENOMEM);
1139
1140 index_table->ptses = av_mallocz(index_table->nb_ptses *
1141 sizeof(int64_t));
1142 index_table->fake_index = av_mallocz(index_table->nb_ptses *
1143 sizeof(AVIndexEntry));
1144 if (!index_table->ptses || !index_table->fake_index) {
1145 av_freep(&index_table->ptses);
1146 return AVERROR(ENOMEM);
1147 }
1148
1149 /* we may have a few bad TemporalOffsets
1150 * make sure the corresponding PTSes don't have the bogus value 0 */
1151 for (x = 0; x < index_table->nb_ptses; x++)
1152 index_table->ptses[x] = AV_NOPTS_VALUE;
1153
1154 /**
1155 * We have this:
1156 *
1157 * x TemporalOffset
1158 * 0: 0
1159 * 1: 1
1160 * 2: 1
1161 * 3: -2
1162 * 4: 1
1163 * 5: 1
1164 * 6: -2
1165 *
1166 * We want to transform it into this:
1167 *
1168 * x DTS PTS
1169 * 0: -1 0
1170 * 1: 0 3
1171 * 2: 1 1
1172 * 3: 2 2
1173 * 4: 3 6
1174 * 5: 4 4
1175 * 6: 5 5
1176 *
1177 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1178 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1179 * The latter makes DTS <= PTS.
1180 */
1181 for (i = x = 0; i < index_table->nb_segments; i++) {
1182 MXFIndexTableSegment *s = index_table->segments[i];
1183 int index_delta = 1;
1184 int n = s->nb_index_entries;
1185
1186 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1187 index_delta = 2; /* Avid index */
1188 /* ignore the last entry - it's the size of the essence container */
1189 n--;
1190 }
1191
1192 for (j = 0; j < n; j += index_delta, x++) {
1193 int offset = s->temporal_offset_entries[j] / index_delta;
1194 int index = x + offset;
1195
1196 if (x >= index_table->nb_ptses) {
1197 av_log(mxf->fc, AV_LOG_ERROR,
1198 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1199 s->nb_index_entries, s->index_duration);
1200 break;
1201 }
1202
1203 index_table->fake_index[x].timestamp = x;
1204 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1205
1206 if (index < 0 || index >= index_table->nb_ptses) {
1207 av_log(mxf->fc, AV_LOG_ERROR,
1208 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1209 x, offset, index);
1210 continue;
1211 }
1212
1213 index_table->ptses[index] = x;
1214 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1215 }
1216 }
1217
1218 index_table->first_dts = -max_temporal_offset;
1219
1220 return 0;
1221 }
1222
1223 /**
1224 * Sorts and collects index table segments into index tables.
1225 * Also computes PTSes if possible.
1226 */
1227 static int mxf_compute_index_tables(MXFContext *mxf)
1228 {
1229 int i, j, k, ret, nb_sorted_segments;
1230 MXFIndexTableSegment **sorted_segments = NULL;
1231
1232 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1233 nb_sorted_segments <= 0) {
1234 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1235 return 0;
1236 }
1237
1238 /* sanity check and count unique BodySIDs/IndexSIDs */
1239 for (i = 0; i < nb_sorted_segments; i++) {
1240 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1241 mxf->nb_index_tables++;
1242 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1243 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1244 ret = AVERROR_INVALIDDATA;
1245 goto finish_decoding_index;
1246 }
1247 }
1248
1249 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1250 sizeof(*mxf->index_tables));
1251 if (!mxf->index_tables) {
1252 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1253 ret = AVERROR(ENOMEM);
1254 goto finish_decoding_index;
1255 }
1256
1257 /* distribute sorted segments to index tables */
1258 for (i = j = 0; i < nb_sorted_segments; i++) {
1259 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1260 /* next IndexSID */
1261 j++;
1262 }
1263
1264 mxf->index_tables[j].nb_segments++;
1265 }
1266
1267 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1268 MXFIndexTable *t = &mxf->index_tables[j];
1269
1270 t->segments = av_mallocz_array(t->nb_segments,
1271 sizeof(*t->segments));
1272
1273 if (!t->segments) {
1274 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1275 " pointer array\n");
1276 ret = AVERROR(ENOMEM);
1277 goto finish_decoding_index;
1278 }
1279
1280 if (sorted_segments[i]->index_start_position)
1281 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1282 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1283
1284 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1285 t->index_sid = sorted_segments[i]->index_sid;
1286 t->body_sid = sorted_segments[i]->body_sid;
1287
1288 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1289 goto finish_decoding_index;
1290
1291 /* fix zero IndexDurations */
1292 for (k = 0; k < t->nb_segments; k++) {
1293 if (t->segments[k]->index_duration)
1294 continue;
1295
1296 if (t->nb_segments > 1)
1297 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1298 t->index_sid, k);
1299
1300 if (mxf->fc->nb_streams <= 0) {
1301 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1302 break;
1303 }
1304
1305 /* assume the first stream's duration is reasonable
1306 * leave index_duration = 0 on further segments in case we have any (unlikely)
1307 */
1308 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1309 break;
1310 }
1311 }
1312
1313 ret = 0;
1314 finish_decoding_index:
1315 av_free(sorted_segments);
1316 return ret;
1317 }
1318
1319 static int mxf_is_intra_only(MXFDescriptor *d)
1320 {
1321 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1322 &d->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1323 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1324 &d->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1325 }
1326
1327 static int mxf_parse_structural_metadata(MXFContext *mxf)
1328 {
1329 MXFPackage *material_package = NULL;
1330 MXFPackage *temp_package = NULL;
1331 int i, j, k, ret;
1332
1333 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1334 /* TODO: handle multiple material packages (OP3x) */
1335 for (i = 0; i < mxf->packages_count; i++) {
1336 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1337 if (material_package) break;
1338 }
1339 if (!material_package) {
1340 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1341 return AVERROR_INVALIDDATA;
1342 }
1343
1344 for (i = 0; i < material_package->tracks_count; i++) {
1345 MXFPackage *source_package = NULL;
1346 MXFTrack *material_track = NULL;
1347 MXFTrack *source_track = NULL;
1348 MXFTrack *temp_track = NULL;
1349 MXFDescriptor *descriptor = NULL;
1350 MXFStructuralComponent *component = NULL;
1351 UID *essence_container_ul = NULL;
1352 const MXFCodecUL *codec_ul = NULL;
1353 const MXFCodecUL *container_ul = NULL;
1354 const MXFCodecUL *pix_fmt_ul = NULL;
1355 AVStream *st;
1356
1357 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1358 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1359 continue;
1360 }
1361
1362 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1363 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1364 continue;
1365 }
1366
1367 /* TODO: handle multiple source clips */
1368 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1369 /* TODO: handle timecode component */
1370 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1371 if (!component)
1372 continue;
1373
1374 for (k = 0; k < mxf->packages_count; k++) {
1375 temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1376 if (!temp_package)
1377 continue;
1378 if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1379 source_package = temp_package;
1380 break;
1381 }
1382 }
1383 if (!source_package) {
1384 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1385 break;
1386 }
1387 for (k = 0; k < source_package->tracks_count; k++) {
1388 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1389 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1390 ret = AVERROR_INVALIDDATA;
1391 goto fail_and_free;
1392 }
1393 if (temp_track->track_id == component->source_track_id) {
1394 source_track = temp_track;
1395 break;
1396 }
1397 }
1398 if (!source_track) {
1399 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1400 break;
1401 }
1402 }
1403 if (!source_track || !component)
1404 continue;
1405
1406 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1407 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1408 ret = AVERROR_INVALIDDATA;
1409 goto fail_and_free;
1410 }
1411
1412 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1413 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1414 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1415 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1416 continue;
1417 }
1418
1419 st = avformat_new_stream(mxf->fc, NULL);
1420 if (!st) {
1421 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1422 ret = AVERROR(ENOMEM);
1423 goto fail_and_free;
1424 }
1425 st->id = source_track->track_id;
1426 st->priv_data = source_track;
1427 st->duration = component->duration;
1428 if (st->duration == -1)
1429 st->duration = AV_NOPTS_VALUE;
1430 st->start_time = component->start_position;
1431 if (material_track->edit_rate.num <= 0 ||
1432 material_track->edit_rate.den <= 0) {
1433 av_log(mxf->fc, AV_LOG_WARNING,
1434 "Invalid edit rate (%d/%d) found on stream #%d, "
1435 "defaulting to 25/1\n",
1436 material_track->edit_rate.num,
1437 material_track->edit_rate.den, st->index);
1438 material_track->edit_rate = (AVRational){25, 1};
1439 }
1440 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1441
1442 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1443 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1444 st->codec->codec_type = codec_ul->id;
1445
1446 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1447 if (source_package->descriptor) {
1448 if (source_package->descriptor->type == MultipleDescriptor) {
1449 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1450 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1451
1452 if (!sub_descriptor) {
1453 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1454 continue;
1455 }
1456 if (sub_descriptor->linked_track_id == source_track->track_id) {
1457 descriptor = sub_descriptor;
1458 break;
1459 }
1460 }
1461 } else if (source_package->descriptor->type == Descriptor)
1462 descriptor = source_package->descriptor;
1463 }
1464 if (!descriptor) {
1465 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1466 continue;
1467 }
1468 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1469 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1470 essence_container_ul = &descriptor->essence_container_ul;
1471 /* HACK: replacing the original key with mxf_encrypted_essence_container
1472 * is not allowed according to s429-6, try to find correct information anyway */
1473 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1474 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1475 for (k = 0; k < mxf->metadata_sets_count; k++) {
1476 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1477 if (metadata->type == CryptoContext) {
1478 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1479 break;
1480 }
1481 }
1482 }
1483
1484 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1485 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1486 st->codec->codec_id = codec_ul->id;
1487
1488 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1489 source_track->intra_only = mxf_is_intra_only(descriptor);
1490 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1491 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1492 st->codec->codec_id = container_ul->id;
1493 st->codec->width = descriptor->width;
1494 /* Field height, not frame height */
1495 st->codec->height = descriptor->height;
1496 switch (descriptor->frame_layout) {
1497 case SegmentedFrame:
1498 /* This one is a weird layout I don't fully understand. */
1499 av_log(mxf->fc, AV_LOG_INFO,
1500 "SegmentedFrame layout isn't currently supported\n");
1501 break;
1502 case FullFrame:
1503 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1504 break;
1505 case OneField:
1506 /* Every other line is stored and needs to be duplicated. */
1507 av_log(mxf->fc, AV_LOG_INFO,
1508 "OneField frame layout isn't currently supported\n");
1509 break;
1510 /* The correct thing to do here is fall through, but by
1511 * breaking we might be able to decode some streams at half
1512 * the vertical resolution, rather than not al all.
1513 * It's also for compatibility with the old behavior. */
1514 case SeparateFields:
1515 case MixedFields:
1516 switch (descriptor->field_dominance) {
1517 case MXF_TFF:
1518 st->codec->field_order = AV_FIELD_TT;
1519 break;
1520 case MXF_BFF:
1521 st->codec->field_order = AV_FIELD_BB;
1522 break;
1523 default:
1524 avpriv_request_sample(mxf->fc,
1525 "Field dominance %d support",
1526 descriptor->field_dominance);
1527 break;
1528 }
1529 /* Turn field height into frame height. */
1530 st->codec->height *= 2;
1531 default:
1532 av_log(mxf->fc, AV_LOG_INFO,
1533 "Unknown frame layout type: %d\n",
1534 descriptor->frame_layout);
1535 }
1536 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1537 st->codec->pix_fmt = descriptor->pix_fmt;
1538 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1539 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1540 &descriptor->essence_codec_ul);
1541 st->codec->pix_fmt = pix_fmt_ul->id;
1542 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1543 /* support files created before RP224v10 by defaulting to UYVY422
1544 if subsampling is 4:2:2 and component depth is 8-bit */
1545 if (descriptor->horiz_subsampling == 2 &&
1546 descriptor->vert_subsampling == 1 &&
1547 descriptor->component_depth == 8) {
1548 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1549 }
1550 }
1551 }
1552 }
1553 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1554 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1555 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1556 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1557 st->codec->codec_id = container_ul->id;
1558 st->codec->channels = descriptor->channels;
1559 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1560
1561 if (descriptor->sample_rate.den > 0) {
1562 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1563 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1564 } else {
1565 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1566 "found for stream #%d, time base forced to 1/48000\n",
1567 descriptor->sample_rate.num, descriptor->sample_rate.den,
1568 st->index);
1569 avpriv_set_pts_info(st, 64, 1, 48000);
1570 }
1571
1572 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1573 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1574 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1575 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1576 else if (descriptor->bits_per_sample == 32)
1577 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1578 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1579 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1580 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1581 else if (descriptor->bits_per_sample == 32)
1582 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1583 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1584 st->need_parsing = AVSTREAM_PARSE_FULL;
1585 }
1586 }
1587 if (descriptor->extradata) {
1588 st->codec->extradata = av_mallocz(descriptor->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
1589 if (st->codec->extradata) {
1590 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1591 st->codec->extradata_size = descriptor->extradata_size;
1592 }
1593 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1594 ret = ff_generate_avci_extradata(st);
1595 if (ret < 0)
1596 return ret;
1597 }
1598 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1599 /* TODO: decode timestamps */
1600 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1601 }
1602 }
1603
1604 ret = 0;
1605 fail_and_free:
1606 return ret;
1607 }
1608
1609 static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
1610 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1611 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1612 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1613 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1614 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1615 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1616 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1617 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1618 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1619 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1620 { { 0x06,0x0E,0x2B,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1621 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1622 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1623 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1624 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1625 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1626 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1627 { { 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 */
1628 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1629 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1630 { { 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 */
1631 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1632 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1633 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1634 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1635 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1636 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1637 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1638 };
1639
1640 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1641 {
1642 AVIOContext *pb = mxf->fc->pb;
1643 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1644 uint64_t klv_end = avio_tell(pb) + klv->length;
1645
1646 if (!ctx)
1647 return AVERROR(ENOMEM);
1648 while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1649 int ret;
1650 int tag = avio_rb16(pb);
1651 int size = avio_rb16(pb); /* KLV specified by 0x53 */
1652 uint64_t next = avio_tell(pb) + size;
1653 UID uid = {0};
1654
1655 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1656 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1657 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1658 continue;
1659 }
1660 if (tag > 0x7FFF) { /* dynamic tag */
1661 int i;
1662 for (i = 0; i < mxf->local_tags_count; i++) {
1663 int local_tag = AV_RB16(mxf->local_tags+i*18);
1664 if (local_tag == tag) {
1665 memcpy(uid, mxf->local_tags+i*18+2, 16);
1666 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1667 PRINT_KEY(mxf->fc, "uid", uid);
1668 }
1669 }
1670 }
1671 if (ctx_size && tag == 0x3C0A)
1672 avio_read(pb, ctx->uid, 16);
1673 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1674 return ret;
1675
1676 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1677 * it extending past the end of the KLV though (zzuf5.mxf). */
1678 if (avio_tell(pb) > klv_end) {
1679 if (ctx_size)
1680 av_free(ctx);
1681
1682 av_log(mxf->fc, AV_LOG_ERROR,
1683 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1684 tag, klv->offset);
1685 return AVERROR_INVALIDDATA;
1686 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1687 avio_seek(pb, next, SEEK_SET);
1688 }
1689 if (ctx_size) ctx->type = type;
1690 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1691 }
1692
1693 /**
1694 * Seeks to the previous partition, if possible
1695 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1696 */
1697 static int mxf_seek_to_previous_partition(MXFContext *mxf)
1698 {
1699 AVIOContext *pb = mxf->fc->pb;
1700
1701 if (!mxf->current_partition ||
1702 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
1703 return 0; /* we've parsed all partitions */
1704
1705 /* seek to previous partition */
1706 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1707 mxf->current_partition = NULL;
1708
1709 av_dlog(mxf->fc, "seeking to previous partition\n");
1710
1711 return 1;
1712 }
1713
1714 /**
1715 * Called when essence is encountered
1716 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1717 */
1718 static int mxf_parse_handle_essence(MXFContext *mxf)
1719 {
1720 AVIOContext *pb = mxf->fc->pb;
1721 int64_t ret;
1722
1723 if (mxf->parsing_backward) {
1724 return mxf_seek_to_previous_partition(mxf);
1725 } else {
1726 if (!mxf->footer_partition) {
1727 av_dlog(mxf->fc, "no footer\n");
1728 return 0;
1729 }
1730
1731 av_dlog(mxf->fc, "seeking to footer\n");
1732
1733 /* remember where we were so we don't end up seeking further back than this */
1734 mxf->last_forward_tell = avio_tell(pb);
1735
1736 if (!pb->seekable) {
1737 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing footer\n");
1738 return -1;
1739 }
1740
1741 /* seek to footer partition and parse backward */
1742 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
1743 av_log(mxf->fc, AV_LOG_ERROR, "failed to seek to footer @ 0x%"PRIx64" (%"PRId64") - partial file?\n",
1744 mxf->run_in + mxf->footer_partition, ret);
1745 return ret;
1746 }
1747
1748 mxf->current_partition = NULL;
1749 mxf->parsing_backward = 1;
1750 }
1751
1752 return 1;
1753 }
1754
1755 /**
1756 * Called when the next partition or EOF is encountered
1757 * @return <= 0 if we should stop parsing, > 0 if we should keep going
1758 */
1759 static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
1760 {
1761 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1762 }
1763
1764 /**
1765 * Figure out the proper offset and length of the essence container
1766 * in each partition
1767 */
1768 static void mxf_compute_essence_containers(MXFContext *mxf)
1769 {
1770 int x;
1771
1772 /* everything is already correct */
1773 if (mxf->op == OPAtom)
1774 return;
1775
1776 for (x = 0; x < mxf->partitions_count; x++) {
1777 MXFPartition *p = &mxf->partitions[x];
1778
1779 if (!p->body_sid)
1780 continue; /* BodySID == 0 -> no essence */
1781
1782 if (x >= mxf->partitions_count - 1)
1783 break; /* last partition - can't compute length (and we don't need to) */
1784
1785 /* essence container spans to the next partition */
1786 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
1787
1788 if (p->essence_length < 0) {
1789 /* next ThisPartition < essence_offset */
1790 p->essence_length = 0;
1791 av_log(mxf->fc, AV_LOG_ERROR,
1792 "partition %i: bad ThisPartition = %"PRIX64"\n",
1793 x+1, mxf->partitions[x+1].this_partition);
1794 }
1795 }
1796 }
1797
1798 static int64_t round_to_kag(int64_t position, int kag_size)
1799 {
1800 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
1801 /* NOTE: kag_size may be any integer between 1 - 2^10 */
1802 int64_t ret = (position / kag_size) * kag_size;
1803 return ret == position ? ret : ret + kag_size;
1804 }
1805
1806 static inline void compute_partition_essence_offset(AVFormatContext *s,
1807 MXFContext *mxf,
1808 KLVPacket *klv)
1809 {
1810 MXFPartition *cur_part = mxf->current_partition;
1811 /* for OP1a we compute essence_offset
1812 * for OPAtom we point essence_offset after the KL
1813 * (usually op1a_essence_offset + 20 or 25)
1814 * TODO: for OP1a we could eliminate this entire if statement, always
1815 * stopping parsing at op1a_essence_offset
1816 * for OPAtom we still need the actual essence_offset though
1817 * (the KL's length can vary)
1818 */
1819 int64_t op1a_essence_offset =
1820 round_to_kag(cur_part->this_partition + cur_part->pack_length,
1821 cur_part->kag_size) +
1822 round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
1823 round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
1824
1825 if (mxf->op == OPAtom) {
1826 /* point essence_offset to the actual data
1827 * OPAtom has all the essence in one big KLV
1828 */
1829 cur_part->essence_offset = avio_tell(s->pb);
1830 cur_part->essence_length = klv->length;
1831 } else {
1832 /* NOTE: op1a_essence_offset may be less than to klv.offset
1833 * (C0023S01.mxf) */
1834 cur_part->essence_offset = op1a_essence_offset;
1835 }
1836 }
1837
1838 static int is_pcm(enum AVCodecID codec_id)
1839 {
1840 /* we only care about "normal" PCM codecs until we get samples */
1841 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
1842 }
1843
1844 /**
1845 * Deal with the case where for some audio atoms EditUnitByteCount is
1846 * very small (2, 4..). In those cases we should read more than one
1847 * sample per call to mxf_read_packet().
1848 */
1849 static void mxf_handle_small_eubc(AVFormatContext *s)
1850 {
1851 MXFContext *mxf = s->priv_data;
1852
1853 /* assuming non-OPAtom == frame wrapped
1854 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
1855 if (mxf->op != OPAtom)
1856 return;
1857
1858 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
1859 if (s->nb_streams != 1 ||
1860 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
1861 !is_pcm(s->streams[0]->codec->codec_id) ||
1862 mxf->nb_index_tables != 1 ||
1863 mxf->index_tables[0].nb_segments != 1 ||
1864 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
1865 return;
1866
1867 /* arbitrarily default to 48 kHz PAL audio frame size */
1868 /* TODO: We could compute this from the ratio between the audio
1869 * and video edit rates for 48 kHz NTSC we could use the
1870 * 1802-1802-1802-1802-1801 pattern. */
1871 mxf->edit_units_per_packet = 1920;
1872 }
1873
1874 static int mxf_read_header(AVFormatContext *s)
1875 {
1876 MXFContext *mxf = s->priv_data;
1877 KLVPacket klv;
1878 int64_t essence_offset = 0;
1879 int ret;
1880
1881 mxf->last_forward_tell = INT64_MAX;
1882 mxf->edit_units_per_packet = 1;
1883
1884 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
1885 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
1886 return AVERROR_INVALIDDATA;
1887 }
1888 avio_seek(s->pb, -14, SEEK_CUR);
1889 mxf->fc = s;
1890 mxf->run_in = avio_tell(s->pb);
1891
1892 while (!s->pb->eof_reached) {
1893 const MXFMetadataReadTableEntry *metadata;
1894
1895 if (klv_read_packet(&klv, s->pb) < 0) {
1896 /* EOF - seek to previous partition or stop */
1897 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1898 break;
1899 else
1900 continue;
1901 }
1902
1903 PRINT_KEY(s, "read header", klv.key);
1904 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
1905 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
1906 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
1907 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
1908 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
1909
1910 if (!mxf->current_partition) {
1911 av_log(mxf->fc, AV_LOG_ERROR,
1912 "found essence prior to first PartitionPack\n");
1913 return AVERROR_INVALIDDATA;
1914 }
1915
1916 if (!mxf->current_partition->essence_offset) {
1917 compute_partition_essence_offset(s, mxf, &klv);
1918 }
1919
1920 if (!essence_offset)
1921 essence_offset = klv.offset;
1922
1923 /* seek to footer, previous partition or stop */
1924 if (mxf_parse_handle_essence(mxf) <= 0)
1925 break;
1926 continue;
1927 } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
1928 klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
1929 /* next partition pack - keep going, seek to previous partition or stop */
1930 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
1931 break;
1932 else if (mxf->parsing_backward)
1933 continue;
1934 /* we're still parsing forward. proceed to parsing this partition pack */
1935 }
1936
1937 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
1938 if (IS_KLV_KEY(klv.key, metadata->key)) {
1939 int res;
1940 if (klv.key[5] == 0x53) {
1941 res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
1942 } else {
1943 uint64_t next = avio_tell(s->pb) + klv.length;
1944 res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
1945
1946 /* only seek forward, else this can loop for a long time */
1947 if (avio_tell(s->pb) > next) {
1948 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
1949 klv.offset);
1950 return AVERROR_INVALIDDATA;
1951 }
1952
1953 avio_seek(s->pb, next, SEEK_SET);
1954 }
1955 if (res < 0) {
1956 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
1957 return res;
1958 }
1959 break;
1960 }
1961 }
1962 if (!metadata->read)
1963 avio_skip(s->pb, klv.length);
1964 }
1965 /* FIXME avoid seek */
1966 if (!essence_offset) {
1967 av_log(s, AV_LOG_ERROR, "no essence\n");
1968 return AVERROR_INVALIDDATA;
1969 }
1970 avio_seek(s->pb, essence_offset, SEEK_SET);
1971
1972 mxf_compute_essence_containers(mxf);
1973
1974 /* we need to do this before computing the index tables
1975 * to be able to fill in zero IndexDurations with st->duration */
1976 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
1977 return ret;
1978
1979 if ((ret = mxf_compute_index_tables(mxf)) < 0)
1980 return ret;
1981
1982 if (mxf->nb_index_tables > 1) {
1983 /* TODO: look up which IndexSID to use via EssenceContainerData */
1984 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
1985 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
1986 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
1987 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
1988 return AVERROR_INVALIDDATA;
1989 }
1990
1991 mxf_handle_small_eubc(s);
1992
1993 return 0;
1994 }
1995
1996 /**
1997 * Sets mxf->current_edit_unit based on what offset we're currently at.
1998 * @return next_ofs if OK, <0 on error
1999 */
2000 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2001 {
2002 int64_t last_ofs = -1, next_ofs = -1;
2003 MXFIndexTable *t = &mxf->index_tables[0];
2004
2005 /* this is called from the OP1a demuxing logic, which means there
2006 * may be no index tables */
2007 if (mxf->nb_index_tables <= 0)
2008 return -1;
2009
2010 /* find mxf->current_edit_unit so that the next edit unit starts ahead
2011 * of current_offset */
2012 while (mxf->current_edit_unit >= 0) {
2013 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2014 NULL, &next_ofs, 0) < 0)
2015 return -1;
2016
2017 if (next_ofs <= last_ofs) {
2018 /* large next_ofs didn't change or current_edit_unit wrapped
2019 * around this fixes the infinite loop on zzuf3.mxf */
2020 av_log(mxf->fc, AV_LOG_ERROR,
2021 "next_ofs didn't change. not deriving packet timestamps\n");
2022 return -1;
2023 }
2024
2025 if (next_ofs > current_offset)
2026 break;
2027
2028 last_ofs = next_ofs;
2029 mxf->current_edit_unit++;
2030 }
2031
2032 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2033 * may lack IndexEntryArrays */
2034 if (mxf->current_edit_unit < 0)
2035 return -1;
2036
2037 return next_ofs;
2038 }
2039
2040 static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2041 {
2042 KLVPacket klv;
2043 MXFContext *mxf = s->priv_data;
2044
2045 while (!s->pb->eof_reached) {
2046 if (klv_read_packet(&klv, s->pb) < 0)
2047 return -1;
2048 PRINT_KEY(s, "read packet", klv.key);
2049 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2050 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2051 int res = mxf_decrypt_triplet(s, pkt, &klv);
2052 if (res < 0) {
2053 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2054 return -1;
2055 }
2056 return 0;
2057 }
2058 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2059 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2060 int index = mxf_get_stream_index(s, &klv);
2061 int64_t next_ofs, next_klv;
2062 AVStream *st;
2063 MXFTrack *track;
2064
2065 if (index < 0) {
2066 av_log(s, AV_LOG_ERROR, "error getting stream index %d\n", AV_RB32(klv.key+12));
2067 goto skip;
2068 }
2069
2070 st = s->streams[index];
2071 track = st->priv_data;
2072
2073 if (s->streams[index]->discard == AVDISCARD_ALL)
2074 goto skip;
2075
2076 next_klv = avio_tell(s->pb) + klv.length;
2077 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2078
2079 if (next_ofs >= 0 && next_klv > next_ofs) {
2080 /* if this check is hit then it's possible OPAtom was treated
2081 * as OP1a truncate the packet since it's probably very large
2082 * (>2 GiB is common) */
2083 avpriv_request_sample(s,
2084 "OPAtom misinterpreted as OP1a?"
2085 "KLV for edit unit %i extending into "
2086 "next edit unit",
2087 mxf->current_edit_unit);
2088 klv.length = next_ofs - avio_tell(s->pb);
2089 }
2090
2091 /* check for 8 channels AES3 element */
2092 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2093 if (mxf_get_d10_aes3_packet(s->pb, s->streams[index], pkt, klv.length) < 0) {
2094 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2095 return -1;
2096 }
2097 } else {
2098 int ret = av_get_packet(s->pb, pkt, klv.length);
2099 if (ret < 0)
2100 return ret;
2101 }
2102 pkt->stream_index = index;
2103 pkt->pos = klv.offset;
2104
2105 if (s->streams[index]->codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2106 /* mxf->current_edit_unit good - see if we have an
2107 * index table to derive timestamps from */
2108 MXFIndexTable *t = &mxf->index_tables[0];
2109
2110 if (mxf->nb_index_tables >= 1 &&
2111 mxf->current_edit_unit < t->nb_ptses) {
2112 pkt->dts = mxf->current_edit_unit + t->first_dts;
2113 pkt->pts = t->ptses[mxf->current_edit_unit];
2114 } else if (track->intra_only) {
2115 /* intra-only -> PTS = EditUnit.
2116 * let utils.c figure out DTS since it can be
2117 * < PTS if low_delay = 0 (Sony IMX30) */
2118 pkt->pts = mxf->current_edit_unit;
2119 }
2120 }
2121
2122 /* seek for truncated packets */
2123 avio_seek(s->pb, next_klv, SEEK_SET);
2124
2125 return 0;
2126 } else
2127 skip:
2128 avio_skip(s->pb, klv.length);
2129 }
2130 return AVERROR_EOF;
2131 }
2132
2133 static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2134 {
2135 MXFContext *mxf = s->priv_data;
2136 int ret, size;
2137 int64_t ret64, pos, next_pos;
2138 AVStream *st;
2139 MXFIndexTable *t;
2140 int edit_units;
2141
2142 if (mxf->op != OPAtom)
2143 return mxf_read_packet_old(s, pkt);
2144
2145 /* OPAtom - clip wrapped demuxing */
2146 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2147 st = s->streams[0];
2148 t = &mxf->index_tables[0];
2149
2150 if (mxf->current_edit_unit >= st->duration)
2151 return AVERROR_EOF;
2152
2153 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2154
2155 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2156 return ret;
2157
2158 /* compute size by finding the next edit unit or the end of the essence container
2159 * not pretty, but it works */
2160 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2161 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2162 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2163 return AVERROR_INVALIDDATA;
2164 }
2165
2166 if ((size = next_pos - pos) <= 0) {
2167 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2168 return AVERROR_INVALIDDATA;
2169 }
2170
2171 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2172 return ret64;
2173
2174 if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2175 return ret < 0 ? ret : AVERROR_EOF;
2176
2177 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2178 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2179 pkt->dts = mxf->current_edit_unit + t->first_dts;
2180 pkt->pts = t->ptses[mxf->current_edit_unit];
2181 }
2182
2183 pkt->stream_index = 0;
2184 mxf->current_edit_unit += edit_units;
2185
2186 return 0;
2187 }
2188
2189
2190 static int mxf_read_close(AVFormatContext *s)
2191 {
2192 MXFContext *mxf = s->priv_data;
2193 MXFIndexTableSegment *seg;
2194 int i;
2195
2196 av_freep(&mxf->packages_refs);
2197
2198 for (i = 0; i < s->nb_streams; i++)
2199 s->streams[i]->priv_data = NULL;
2200
2201 for (i = 0; i < mxf->metadata_sets_count; i++) {
2202 switch (mxf->metadata_sets[i]->type) {
2203 case Descriptor:
2204 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2205 break;
2206 case MultipleDescriptor:
2207 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2208 break;
2209 case Sequence:
2210 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2211 break;
2212 case SourcePackage:
2213 case MaterialPackage:
2214 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2215 break;
2216 case IndexTableSegment:
2217 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2218 av_freep(&seg->temporal_offset_entries);
2219 av_freep(&seg->flag_entries);
2220 av_freep(&seg->stream_offset_entries);
2221 break;
2222 default:
2223 break;
2224 }
2225 av_freep(&mxf->metadata_sets[i]);
2226 }
2227 av_freep(&mxf->partitions);
2228 av_freep(&mxf->metadata_sets);
2229 av_freep(&mxf->aesc);
2230 av_freep(&mxf->local_tags);
2231
2232 for (i = 0; i < mxf->nb_index_tables; i++) {
2233 av_freep(&mxf->index_tables[i].segments);
2234 av_freep(&mxf->index_tables[i].ptses);
2235 av_freep(&mxf->index_tables[i].fake_index);
2236 }
2237 av_freep(&mxf->index_tables);
2238
2239 return 0;
2240 }
2241
2242 static int mxf_probe(AVProbeData *p) {
2243 uint8_t *bufp = p->buf;
2244 uint8_t *end = p->buf + p->buf_size;
2245
2246 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2247 return 0;
2248
2249 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2250 end -= sizeof(mxf_header_partition_pack_key);
2251 for (; bufp < end; bufp++) {
2252 if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
2253 return AVPROBE_SCORE_MAX;
2254 }
2255 return 0;
2256 }
2257
2258 /* rudimentary byte seek */
2259 /* XXX: use MXF Index */
2260 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2261 {
2262 AVStream *st = s->streams[stream_index];
2263 int64_t seconds;
2264 MXFContext* mxf = s->priv_data;
2265 int64_t seekpos;
2266 int ret;
2267 MXFIndexTable *t;
2268
2269 if (mxf->nb_index_tables <= 0) {
2270 if (!s->bit_rate)
2271 return AVERROR_INVALIDDATA;
2272 if (sample_time < 0)
2273 sample_time = 0;
2274 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2275
2276 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2277 if (seekpos < 0)
2278 return seekpos;
2279
2280 ff_update_cur_dts(s, st, sample_time);
2281 mxf->current_edit_unit = sample_time;
2282 } else {
2283 t = &mxf->index_tables[0];
2284
2285 /* clamp above zero, else ff_index_search_timestamp() returns negative
2286 * this also means we allow seeking before the start */
2287 sample_time = FFMAX(sample_time, 0);
2288
2289 if (t->fake_index) {
2290 /* behave as if we have a proper index */
2291 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2292 return sample_time;
2293 } else {
2294 /* no IndexEntryArray (one or more CBR segments)
2295 * make sure we don't seek past the end */
2296 sample_time = FFMIN(sample_time, st->duration - 1);
2297 }
2298
2299 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2300 return ret;
2301
2302 ff_update_cur_dts(s, st, sample_time);
2303 mxf->current_edit_unit = sample_time;
2304 avio_seek(s->pb, seekpos, SEEK_SET);
2305 }
2306 return 0;
2307 }
2308
2309 AVInputFormat ff_mxf_demuxer = {
2310 .name = "mxf",
2311 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2312 .priv_data_size = sizeof(MXFContext),
2313 .read_probe = mxf_probe,
2314 .read_header = mxf_read_header,
2315 .read_packet = mxf_read_packet,
2316 .read_close = mxf_read_close,
2317 .read_seek = mxf_read_seek,
2318 };