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Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / mxfdec.c
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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 FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 <inttypes.h>
47
48#include "libavutil/aes.h"
49#include "libavutil/avassert.h"
50#include "libavutil/mathematics.h"
51#include "libavcodec/bytestream.h"
52#include "libavutil/intreadwrite.h"
53#include "libavutil/timecode.h"
54#include "avformat.h"
55#include "internal.h"
56#include "mxf.h"
57
58typedef enum {
59 Header,
60 BodyPartition,
61 Footer
62} MXFPartitionType;
63
64typedef enum {
65 OP1a = 1,
66 OP1b,
67 OP1c,
68 OP2a,
69 OP2b,
70 OP2c,
71 OP3a,
72 OP3b,
73 OP3c,
74 OPAtom,
75 OPSONYOpt, /* FATE sample, violates the spec in places */
76} MXFOP;
77
78typedef struct {
79 int closed;
80 int complete;
81 MXFPartitionType type;
82 uint64_t previous_partition;
83 int index_sid;
84 int body_sid;
85 int64_t this_partition;
86 int64_t essence_offset; ///< absolute offset of essence
87 int64_t essence_length;
88 int32_t kag_size;
89 int64_t header_byte_count;
90 int64_t index_byte_count;
91 int pack_length;
92 int64_t pack_ofs; ///< absolute offset of pack in file, including run-in
93} MXFPartition;
94
95typedef struct {
96 UID uid;
97 enum MXFMetadataSetType type;
98 UID source_container_ul;
99} MXFCryptoContext;
100
101typedef struct {
102 UID uid;
103 enum MXFMetadataSetType type;
104 UID source_package_uid;
105 UID data_definition_ul;
106 int64_t duration;
107 int64_t start_position;
108 int source_track_id;
109} MXFStructuralComponent;
110
111typedef struct {
112 UID uid;
113 enum MXFMetadataSetType type;
114 UID data_definition_ul;
115 UID *structural_components_refs;
116 int structural_components_count;
117 int64_t duration;
118 uint8_t origin;
119} MXFSequence;
120
121typedef struct {
122 UID uid;
123 enum MXFMetadataSetType type;
124 int drop_frame;
125 int start_frame;
126 struct AVRational rate;
127 AVTimecode tc;
128} MXFTimecodeComponent;
129
130typedef struct {
131 UID uid;
132 enum MXFMetadataSetType type;
133 UID input_segment_ref;
134} MXFPulldownComponent;
135
136typedef struct {
137 UID uid;
138 enum MXFMetadataSetType type;
139 UID *structural_components_refs;
140 int structural_components_count;
141 int64_t duration;
142} MXFEssenceGroup;
143
144typedef struct {
145 UID uid;
146 enum MXFMetadataSetType type;
147 MXFSequence *sequence; /* mandatory, and only one */
148 UID sequence_ref;
149 int track_id;
150 uint8_t track_number[4];
151 AVRational edit_rate;
152 int intra_only;
153 uint64_t sample_count;
154 int64_t original_duration; /* st->duration in SampleRate/EditRate units */
155} MXFTrack;
156
157typedef struct {
158 UID uid;
159 enum MXFMetadataSetType type;
160 UID essence_container_ul;
161 UID essence_codec_ul;
162 AVRational sample_rate;
163 AVRational aspect_ratio;
164 int width;
165 int height; /* Field height, not frame height */
166 int frame_layout; /* See MXFFrameLayout enum */
167#define MXF_TFF 1
168#define MXF_BFF 2
169 int field_dominance;
170 int channels;
171 int bits_per_sample;
172 int64_t duration; /* ContainerDuration optional property */
173 unsigned int component_depth;
174 unsigned int horiz_subsampling;
175 unsigned int vert_subsampling;
176 UID *sub_descriptors_refs;
177 int sub_descriptors_count;
178 int linked_track_id;
179 uint8_t *extradata;
180 int extradata_size;
181 enum AVPixelFormat pix_fmt;
182} MXFDescriptor;
183
184typedef struct {
185 UID uid;
186 enum MXFMetadataSetType type;
187 int edit_unit_byte_count;
188 int index_sid;
189 int body_sid;
190 AVRational index_edit_rate;
191 uint64_t index_start_position;
192 uint64_t index_duration;
193 int8_t *temporal_offset_entries;
194 int *flag_entries;
195 uint64_t *stream_offset_entries;
196 int nb_index_entries;
197} MXFIndexTableSegment;
198
199typedef struct {
200 UID uid;
201 enum MXFMetadataSetType type;
202 UID package_uid;
203 UID *tracks_refs;
204 int tracks_count;
205 MXFDescriptor *descriptor; /* only one */
206 UID descriptor_ref;
207 char *name;
208} MXFPackage;
209
210typedef struct {
211 UID uid;
212 enum MXFMetadataSetType type;
213} MXFMetadataSet;
214
215/* decoded index table */
216typedef struct {
217 int index_sid;
218 int body_sid;
219 int nb_ptses; /* number of PTSes or total duration of index */
220 int64_t first_dts; /* DTS = EditUnit + first_dts */
221 int64_t *ptses; /* maps EditUnit -> PTS */
222 int nb_segments;
223 MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
224 AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
225} MXFIndexTable;
226
227typedef struct {
228 MXFPartition *partitions;
229 unsigned partitions_count;
230 MXFOP op;
231 UID *packages_refs;
232 int packages_count;
233 MXFMetadataSet **metadata_sets;
234 int metadata_sets_count;
235 AVFormatContext *fc;
236 struct AVAES *aesc;
237 uint8_t *local_tags;
238 int local_tags_count;
239 uint64_t footer_partition;
240 KLVPacket current_klv_data;
241 int current_klv_index;
242 int run_in;
243 MXFPartition *current_partition;
244 int parsing_backward;
245 int64_t last_forward_tell;
246 int last_forward_partition;
247 int current_edit_unit;
248 int nb_index_tables;
249 MXFIndexTable *index_tables;
250 int edit_units_per_packet; ///< how many edit units to read at a time (PCM, OPAtom)
251} MXFContext;
252
253enum MXFWrappingScheme {
254 Frame,
255 Clip,
256};
257
258/* NOTE: klv_offset is not set (-1) for local keys */
259typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
260
261typedef struct {
262 const UID key;
263 MXFMetadataReadFunc *read;
264 int ctx_size;
265 enum MXFMetadataSetType type;
266} MXFMetadataReadTableEntry;
267
268static int mxf_read_close(AVFormatContext *s);
269
270/* partial keys to match */
271static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
272static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
273static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
274static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
275static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
276/* complete keys to match */
277static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
278static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
279static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
280static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
281static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
282
283#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
284
285static int64_t klv_decode_ber_length(AVIOContext *pb)
286{
287 uint64_t size = avio_r8(pb);
288 if (size & 0x80) { /* long form */
289 int bytes_num = size & 0x7f;
290 /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
291 if (bytes_num > 8)
292 return AVERROR_INVALIDDATA;
293 size = 0;
294 while (bytes_num--)
295 size = size << 8 | avio_r8(pb);
296 }
297 return size;
298}
299
300static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
301{
302 int i, b;
303 for (i = 0; i < size && !avio_feof(pb); i++) {
304 b = avio_r8(pb);
305 if (b == key[0])
306 i = 0;
307 else if (b != key[i])
308 i = -1;
309 }
310 return i == size;
311}
312
313static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
314{
315 if (!mxf_read_sync(pb, mxf_klv_key, 4))
316 return AVERROR_INVALIDDATA;
317 klv->offset = avio_tell(pb) - 4;
318 memcpy(klv->key, mxf_klv_key, 4);
319 avio_read(pb, klv->key + 4, 12);
320 klv->length = klv_decode_ber_length(pb);
321 return klv->length == -1 ? -1 : 0;
322}
323
324static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
325{
326 int i;
327
328 for (i = 0; i < s->nb_streams; i++) {
329 MXFTrack *track = s->streams[i]->priv_data;
330 /* SMPTE 379M 7.3 */
331 if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
332 return i;
333 }
334 /* return 0 if only one stream, for OP Atom files with 0 as track number */
335 return s->nb_streams == 1 ? 0 : -1;
336}
337
338/* XXX: use AVBitStreamFilter */
339static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
340{
341 const uint8_t *buf_ptr, *end_ptr;
342 uint8_t *data_ptr;
343 int i;
344
345 if (length > 61444) /* worst case PAL 1920 samples 8 channels */
346 return AVERROR_INVALIDDATA;
347 length = av_get_packet(pb, pkt, length);
348 if (length < 0)
349 return length;
350 data_ptr = pkt->data;
351 end_ptr = pkt->data + length;
352 buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
353 for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
354 for (i = 0; i < st->codec->channels; i++) {
355 uint32_t sample = bytestream_get_le32(&buf_ptr);
356 if (st->codec->bits_per_coded_sample == 24)
357 bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
358 else
359 bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
360 }
361 buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
362 }
363 av_shrink_packet(pkt, data_ptr - pkt->data);
364 return 0;
365}
366
367static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
368{
369 static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
370 MXFContext *mxf = s->priv_data;
371 AVIOContext *pb = s->pb;
372 int64_t end = avio_tell(pb) + klv->length;
373 int64_t size;
374 uint64_t orig_size;
375 uint64_t plaintext_size;
376 uint8_t ivec[16];
377 uint8_t tmpbuf[16];
378 int index;
379
380 if (!mxf->aesc && s->key && s->keylen == 16) {
381 mxf->aesc = av_aes_alloc();
382 if (!mxf->aesc)
383 return AVERROR(ENOMEM);
384 av_aes_init(mxf->aesc, s->key, 128, 1);
385 }
386 // crypto context
387 avio_skip(pb, klv_decode_ber_length(pb));
388 // plaintext offset
389 klv_decode_ber_length(pb);
390 plaintext_size = avio_rb64(pb);
391 // source klv key
392 klv_decode_ber_length(pb);
393 avio_read(pb, klv->key, 16);
394 if (!IS_KLV_KEY(klv, mxf_essence_element_key))
395 return AVERROR_INVALIDDATA;
396 index = mxf_get_stream_index(s, klv);
397 if (index < 0)
398 return AVERROR_INVALIDDATA;
399 // source size
400 klv_decode_ber_length(pb);
401 orig_size = avio_rb64(pb);
402 if (orig_size < plaintext_size)
403 return AVERROR_INVALIDDATA;
404 // enc. code
405 size = klv_decode_ber_length(pb);
406 if (size < 32 || size - 32 < orig_size)
407 return AVERROR_INVALIDDATA;
408 avio_read(pb, ivec, 16);
409 avio_read(pb, tmpbuf, 16);
410 if (mxf->aesc)
411 av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
412 if (memcmp(tmpbuf, checkv, 16))
413 av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
414 size -= 32;
415 size = av_get_packet(pb, pkt, size);
416 if (size < 0)
417 return size;
418 else if (size < plaintext_size)
419 return AVERROR_INVALIDDATA;
420 size -= plaintext_size;
421 if (mxf->aesc)
422 av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
423 &pkt->data[plaintext_size], size >> 4, ivec, 1);
424 av_shrink_packet(pkt, orig_size);
425 pkt->stream_index = index;
426 avio_skip(pb, end - avio_tell(pb));
427 return 0;
428}
429
430static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
431{
432 MXFContext *mxf = arg;
433 int item_num = avio_rb32(pb);
434 int item_len = avio_rb32(pb);
435
436 if (item_len != 18) {
437 avpriv_request_sample(pb, "Primer pack item length %d", item_len);
438 return AVERROR_PATCHWELCOME;
439 }
440 if (item_num > 65536) {
441 av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
442 return AVERROR_INVALIDDATA;
443 }
444 if (mxf->local_tags)
445 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple primer packs\n");
446 av_free(mxf->local_tags);
447 mxf->local_tags_count = 0;
448 mxf->local_tags = av_calloc(item_num, item_len);
449 if (!mxf->local_tags)
450 return AVERROR(ENOMEM);
451 mxf->local_tags_count = item_num;
452 avio_read(pb, mxf->local_tags, item_num*item_len);
453 return 0;
454}
455
456static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
457{
458 MXFContext *mxf = arg;
459 MXFPartition *partition, *tmp_part;
460 UID op;
461 uint64_t footer_partition;
462 uint32_t nb_essence_containers;
463
464 tmp_part = av_realloc_array(mxf->partitions, mxf->partitions_count + 1, sizeof(*mxf->partitions));
465 if (!tmp_part)
466 return AVERROR(ENOMEM);
467 mxf->partitions = tmp_part;
468
469 if (mxf->parsing_backward) {
470 /* insert the new partition pack in the middle
471 * this makes the entries in mxf->partitions sorted by offset */
472 memmove(&mxf->partitions[mxf->last_forward_partition+1],
473 &mxf->partitions[mxf->last_forward_partition],
474 (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
475 partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
476 } else {
477 mxf->last_forward_partition++;
478 partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
479 }
480
481 memset(partition, 0, sizeof(*partition));
482 mxf->partitions_count++;
483 partition->pack_length = avio_tell(pb) - klv_offset + size;
484 partition->pack_ofs = klv_offset;
485
486 switch(uid[13]) {
487 case 2:
488 partition->type = Header;
489 break;
490 case 3:
491 partition->type = BodyPartition;
492 break;
493 case 4:
494 partition->type = Footer;
495 break;
496 default:
497 av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
498 return AVERROR_INVALIDDATA;
499 }
500
501 /* consider both footers to be closed (there is only Footer and CompleteFooter) */
502 partition->closed = partition->type == Footer || !(uid[14] & 1);
503 partition->complete = uid[14] > 2;
504 avio_skip(pb, 4);
505 partition->kag_size = avio_rb32(pb);
506 partition->this_partition = avio_rb64(pb);
507 partition->previous_partition = avio_rb64(pb);
508 footer_partition = avio_rb64(pb);
509 partition->header_byte_count = avio_rb64(pb);
510 partition->index_byte_count = avio_rb64(pb);
511 partition->index_sid = avio_rb32(pb);
512 avio_skip(pb, 8);
513 partition->body_sid = avio_rb32(pb);
514 if (avio_read(pb, op, sizeof(UID)) != sizeof(UID)) {
515 av_log(mxf->fc, AV_LOG_ERROR, "Failed reading UID\n");
516 return AVERROR_INVALIDDATA;
517 }
518 nb_essence_containers = avio_rb32(pb);
519
520 if (partition->this_partition &&
521 partition->previous_partition == partition->this_partition) {
522 av_log(mxf->fc, AV_LOG_ERROR,
523 "PreviousPartition equal to ThisPartition %"PRIx64"\n",
524 partition->previous_partition);
525 /* override with the actual previous partition offset */
526 if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
527 MXFPartition *prev =
528 mxf->partitions + mxf->last_forward_partition - 2;
529 partition->previous_partition = prev->this_partition;
530 }
531 /* if no previous body partition are found point to the header
532 * partition */
533 if (partition->previous_partition == partition->this_partition)
534 partition->previous_partition = 0;
535 av_log(mxf->fc, AV_LOG_ERROR,
536 "Overriding PreviousPartition with %"PRIx64"\n",
537 partition->previous_partition);
538 }
539
540 /* some files don'thave FooterPartition set in every partition */
541 if (footer_partition) {
542 if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
543 av_log(mxf->fc, AV_LOG_ERROR,
544 "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
545 mxf->footer_partition, footer_partition);
546 } else {
547 mxf->footer_partition = footer_partition;
548 }
549 }
550
551 av_dlog(mxf->fc,
552 "PartitionPack: ThisPartition = 0x%"PRIX64
553 ", PreviousPartition = 0x%"PRIX64", "
554 "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
555 partition->this_partition,
556 partition->previous_partition, footer_partition,
557 partition->index_sid, partition->body_sid);
558
559 /* sanity check PreviousPartition if set */
560 //NOTE: this isn't actually enough, see mxf_seek_to_previous_partition()
561 if (partition->previous_partition &&
562 mxf->run_in + partition->previous_partition >= klv_offset) {
563 av_log(mxf->fc, AV_LOG_ERROR,
564 "PreviousPartition points to this partition or forward\n");
565 return AVERROR_INVALIDDATA;
566 }
567
568 if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
569 else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
570 else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
571 else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
572 else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
573 else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
574 else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
575 else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
576 else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
577 else if (op[12] == 64&& op[13] == 1) mxf->op = OPSONYOpt;
578 else if (op[12] == 0x10) {
579 /* SMPTE 390m: "There shall be exactly one essence container"
580 * The following block deals with files that violate this, namely:
581 * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
582 * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
583 if (nb_essence_containers != 1) {
584 MXFOP op = nb_essence_containers ? OP1a : OPAtom;
585
586 /* only nag once */
587 if (!mxf->op)
588 av_log(mxf->fc, AV_LOG_WARNING,
589 "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
590 nb_essence_containers,
591 op == OP1a ? "OP1a" : "OPAtom");
592
593 mxf->op = op;
594 } else
595 mxf->op = OPAtom;
596 } else {
597 av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
598 mxf->op = OP1a;
599 }
600
601 if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
602 av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
603 partition->kag_size);
604
605 if (mxf->op == OPSONYOpt)
606 partition->kag_size = 512;
607 else
608 partition->kag_size = 1;
609
610 av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
611 }
612
613 return 0;
614}
615
616static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
617{
618 MXFMetadataSet **tmp;
619
620 tmp = av_realloc_array(mxf->metadata_sets, mxf->metadata_sets_count + 1, sizeof(*mxf->metadata_sets));
621 if (!tmp)
622 return AVERROR(ENOMEM);
623 mxf->metadata_sets = tmp;
624 mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
625 mxf->metadata_sets_count++;
626 return 0;
627}
628
629static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
630{
631 MXFCryptoContext *cryptocontext = arg;
632 if (size != 16)
633 return AVERROR_INVALIDDATA;
634 if (IS_KLV_KEY(uid, mxf_crypto_source_container_ul))
635 avio_read(pb, cryptocontext->source_container_ul, 16);
636 return 0;
637}
638
639static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
640{
641 MXFContext *mxf = arg;
642 switch (tag) {
643 case 0x1901:
644 if (mxf->packages_refs)
645 av_log(mxf->fc, AV_LOG_VERBOSE, "Multiple packages_refs\n");
646 av_free(mxf->packages_refs);
647 mxf->packages_count = avio_rb32(pb);
648 mxf->packages_refs = av_calloc(mxf->packages_count, sizeof(UID));
649 if (!mxf->packages_refs)
650 return AVERROR(ENOMEM);
651 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
652 avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
653 break;
654 }
655 return 0;
656}
657
658static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
659{
660 MXFStructuralComponent *source_clip = arg;
661 switch(tag) {
662 case 0x0202:
663 source_clip->duration = avio_rb64(pb);
664 break;
665 case 0x1201:
666 source_clip->start_position = avio_rb64(pb);
667 break;
668 case 0x1101:
669 /* UMID, only get last 16 bytes */
670 avio_skip(pb, 16);
671 avio_read(pb, source_clip->source_package_uid, 16);
672 break;
673 case 0x1102:
674 source_clip->source_track_id = avio_rb32(pb);
675 break;
676 }
677 return 0;
678}
679
680static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
681{
682 MXFTimecodeComponent *mxf_timecode = arg;
683 switch(tag) {
684 case 0x1501:
685 mxf_timecode->start_frame = avio_rb64(pb);
686 break;
687 case 0x1502:
688 mxf_timecode->rate = (AVRational){avio_rb16(pb), 1};
689 break;
690 case 0x1503:
691 mxf_timecode->drop_frame = avio_r8(pb);
692 break;
693 }
694 return 0;
695}
696
697static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
698{
699 MXFPulldownComponent *mxf_pulldown = arg;
700 switch(tag) {
701 case 0x0d01:
702 avio_read(pb, mxf_pulldown->input_segment_ref, 16);
703 break;
704 }
705 return 0;
706}
707
708static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
709{
710 MXFTrack *track = arg;
711 switch(tag) {
712 case 0x4801:
713 track->track_id = avio_rb32(pb);
714 break;
715 case 0x4804:
716 avio_read(pb, track->track_number, 4);
717 break;
718 case 0x4b01:
719 track->edit_rate.num = avio_rb32(pb);
720 track->edit_rate.den = avio_rb32(pb);
721 break;
722 case 0x4803:
723 avio_read(pb, track->sequence_ref, 16);
724 break;
725 }
726 return 0;
727}
728
729static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
730{
731 MXFSequence *sequence = arg;
732 switch(tag) {
733 case 0x0202:
734 sequence->duration = avio_rb64(pb);
735 break;
736 case 0x0201:
737 avio_read(pb, sequence->data_definition_ul, 16);
738 break;
739 case 0x4b02:
740 sequence->origin = avio_r8(pb);
741 break;
742 case 0x1001:
743 sequence->structural_components_count = avio_rb32(pb);
744 sequence->structural_components_refs = av_calloc(sequence->structural_components_count, sizeof(UID));
745 if (!sequence->structural_components_refs) {
746 sequence->structural_components_count = 0;
747 return AVERROR(ENOMEM);
748 }
749 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
750 avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
751 break;
752 }
753 return 0;
754}
755
756static int mxf_read_essence_group(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
757{
758 MXFEssenceGroup *essence_group = arg;
759 switch (tag) {
760 case 0x0202:
761 essence_group->duration = avio_rb64(pb);
762 break;
763 case 0x0501:
764 essence_group->structural_components_count = avio_rb32(pb);
765 essence_group->structural_components_refs = av_calloc(essence_group->structural_components_count, sizeof(UID));
766 if (!essence_group->structural_components_refs) {
767 essence_group->structural_components_count = 0;
768 return AVERROR(ENOMEM);
769 }
770 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
771 avio_read(pb, (uint8_t *)essence_group->structural_components_refs, essence_group->structural_components_count * sizeof(UID));
772 break;
773 }
774 return 0;
775}
776
777static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
778{
779 int ret;
780 size_t buf_size;
781
782 if (size < 0)
783 return AVERROR(EINVAL);
784
785 buf_size = size + size / 2 + 1;
786 *str = av_malloc(buf_size);
787 if (!*str)
788 return AVERROR(ENOMEM);
789
790 if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
791 av_freep(str);
792 return ret;
793 }
794
795 return ret;
796}
797
798static int mxf_read_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
799{
800 MXFPackage *package = arg;
801 switch(tag) {
802 case 0x4403:
803 package->tracks_count = avio_rb32(pb);
804 package->tracks_refs = av_calloc(package->tracks_count, sizeof(UID));
805 if (!package->tracks_refs)
806 return AVERROR(ENOMEM);
807 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
808 avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
809 break;
810 case 0x4401:
811 /* UMID, only get last 16 bytes */
812 avio_skip(pb, 16);
813 avio_read(pb, package->package_uid, 16);
814 break;
815 case 0x4701:
816 avio_read(pb, package->descriptor_ref, 16);
817 break;
818 case 0x4402:
819 return mxf_read_utf16_string(pb, size, &package->name);
820 }
821 return 0;
822}
823
824static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
825{
826 int i, length;
827
828 segment->nb_index_entries = avio_rb32(pb);
829
830 length = avio_rb32(pb);
831
832 if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) ||
833 !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) ||
834 !(segment->stream_offset_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->stream_offset_entries))))
835 return AVERROR(ENOMEM);
836
837 for (i = 0; i < segment->nb_index_entries; i++) {
838 segment->temporal_offset_entries[i] = avio_r8(pb);
839 avio_r8(pb); /* KeyFrameOffset */
840 segment->flag_entries[i] = avio_r8(pb);
841 segment->stream_offset_entries[i] = avio_rb64(pb);
842 avio_skip(pb, length - 11);
843 }
844 return 0;
845}
846
847static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
848{
849 MXFIndexTableSegment *segment = arg;
850 switch(tag) {
851 case 0x3F05:
852 segment->edit_unit_byte_count = avio_rb32(pb);
853 av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
854 break;
855 case 0x3F06:
856 segment->index_sid = avio_rb32(pb);
857 av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
858 break;
859 case 0x3F07:
860 segment->body_sid = avio_rb32(pb);
861 av_dlog(NULL, "BodySID %d\n", segment->body_sid);
862 break;
863 case 0x3F0A:
864 av_dlog(NULL, "IndexEntryArray found\n");
865 return mxf_read_index_entry_array(pb, segment);
866 case 0x3F0B:
867 segment->index_edit_rate.num = avio_rb32(pb);
868 segment->index_edit_rate.den = avio_rb32(pb);
869 av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
870 segment->index_edit_rate.den);
871 break;
872 case 0x3F0C:
873 segment->index_start_position = avio_rb64(pb);
874 av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
875 break;
876 case 0x3F0D:
877 segment->index_duration = avio_rb64(pb);
878 av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
879 break;
880 }
881 return 0;
882}
883
884static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
885{
886 int code, value, ofs = 0;
887 char layout[16] = {0}; /* not for printing, may end up not terminated on purpose */
888
889 do {
890 code = avio_r8(pb);
891 value = avio_r8(pb);
892 av_dlog(NULL, "pixel layout: code %#x\n", code);
893
894 if (ofs <= 14) {
895 layout[ofs++] = code;
896 layout[ofs++] = value;
897 } else
898 break; /* don't read byte by byte on sneaky files filled with lots of non-zeroes */
899 } while (code != 0); /* SMPTE 377M E.2.46 */
900
901 ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
902}
903
904static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
905{
906 MXFDescriptor *descriptor = arg;
907 switch(tag) {
908 case 0x3F01:
909 descriptor->sub_descriptors_count = avio_rb32(pb);
910 descriptor->sub_descriptors_refs = av_calloc(descriptor->sub_descriptors_count, sizeof(UID));
911 if (!descriptor->sub_descriptors_refs)
912 return AVERROR(ENOMEM);
913 avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
914 avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
915 break;
916 case 0x3002: /* ContainerDuration */
917 descriptor->duration = avio_rb64(pb);
918 break;
919 case 0x3004:
920 avio_read(pb, descriptor->essence_container_ul, 16);
921 break;
922 case 0x3006:
923 descriptor->linked_track_id = avio_rb32(pb);
924 break;
925 case 0x3201: /* PictureEssenceCoding */
926 avio_read(pb, descriptor->essence_codec_ul, 16);
927 break;
928 case 0x3203:
929 descriptor->width = avio_rb32(pb);
930 break;
931 case 0x3202:
932 descriptor->height = avio_rb32(pb);
933 break;
934 case 0x320C:
935 descriptor->frame_layout = avio_r8(pb);
936 break;
937 case 0x320E:
938 descriptor->aspect_ratio.num = avio_rb32(pb);
939 descriptor->aspect_ratio.den = avio_rb32(pb);
940 break;
941 case 0x3212:
942 descriptor->field_dominance = avio_r8(pb);
943 break;
944 case 0x3301:
945 descriptor->component_depth = avio_rb32(pb);
946 break;
947 case 0x3302:
948 descriptor->horiz_subsampling = avio_rb32(pb);
949 break;
950 case 0x3308:
951 descriptor->vert_subsampling = avio_rb32(pb);
952 break;
953 case 0x3D03:
954 descriptor->sample_rate.num = avio_rb32(pb);
955 descriptor->sample_rate.den = avio_rb32(pb);
956 break;
957 case 0x3D06: /* SoundEssenceCompression */
958 avio_read(pb, descriptor->essence_codec_ul, 16);
959 break;
960 case 0x3D07:
961 descriptor->channels = avio_rb32(pb);
962 break;
963 case 0x3D01:
964 descriptor->bits_per_sample = avio_rb32(pb);
965 break;
966 case 0x3401:
967 mxf_read_pixel_layout(pb, descriptor);
968 break;
969 default:
970 /* Private uid used by SONY C0023S01.mxf */
971 if (IS_KLV_KEY(uid, mxf_sony_mpeg4_extradata)) {
972 if (descriptor->extradata)
973 av_log(NULL, AV_LOG_WARNING, "Duplicate sony_mpeg4_extradata\n");
974 av_free(descriptor->extradata);
975 descriptor->extradata_size = 0;
976 descriptor->extradata = av_malloc(size);
977 if (!descriptor->extradata)
978 return AVERROR(ENOMEM);
979 descriptor->extradata_size = size;
980 avio_read(pb, descriptor->extradata, size);
981 }
982 break;
983 }
984 return 0;
985}
986
987/*
988 * Match an uid independently of the version byte and up to len common bytes
989 * Returns: boolean
990 */
991static int mxf_match_uid(const UID key, const UID uid, int len)
992{
993 int i;
994 for (i = 0; i < len; i++) {
995 if (i != 7 && key[i] != uid[i])
996 return 0;
997 }
998 return 1;
999}
1000
1001static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
1002{
1003 while (uls->uid[0]) {
1004 if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
1005 break;
1006 uls++;
1007 }
1008 return uls;
1009}
1010
1011static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
1012{
1013 int i;
1014
1015 if (!strong_ref)
1016 return NULL;
1017 for (i = 0; i < mxf->metadata_sets_count; i++) {
1018 if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
1019 (type == AnyType || mxf->metadata_sets[i]->type == type)) {
1020 return mxf->metadata_sets[i];
1021 }
1022 }
1023 return NULL;
1024}
1025
1026static const MXFCodecUL mxf_picture_essence_container_uls[] = {
1027 // video essence container uls
1028 { { 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 */
1029 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
1030 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
1031 { { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0xff,0x4b,0x46,0x41,0x41,0x00,0x0d,0x4d,0x4f }, 14, AV_CODEC_ID_RAWVIDEO }, /* Legacy ?? Uncompressed Picture */
1032 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1033};
1034
1035/* EC ULs for intra-only formats */
1036static const MXFCodecUL mxf_intra_only_essence_container_uls[] = {
1037 { { 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 */
1038 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1039};
1040
1041/* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
1042static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[] = {
1043 { { 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 */
1044 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
1045 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1046};
1047
1048static const MXFCodecUL mxf_sound_essence_container_uls[] = {
1049 // sound essence container uls
1050 { { 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 */
1051 { { 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 */
1052 { { 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 */
1053 { { 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 */
1054 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x03,0x04,0x02,0x02,0x02,0x03,0x03,0x01,0x00 }, 14, AV_CODEC_ID_AAC }, /* MPEG2 AAC ADTS (legacy) */
1055 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1056};
1057
1058static const MXFCodecUL mxf_data_essence_container_uls[] = {
1059 { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
1060 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
1061};
1062
1063static const char* const mxf_data_essence_descriptor[] = {
1064 "vbi_vanc_smpte_436M",
1065};
1066
1067static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
1068{
1069 int i, j, nb_segments = 0;
1070 MXFIndexTableSegment **unsorted_segments;
1071 int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
1072
1073 /* count number of segments, allocate arrays and copy unsorted segments */
1074 for (i = 0; i < mxf->metadata_sets_count; i++)
1075 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1076 nb_segments++;
1077
1078 if (!nb_segments)
1079 return AVERROR_INVALIDDATA;
1080
1081 if (!(unsorted_segments = av_calloc(nb_segments, sizeof(*unsorted_segments))) ||
1082 !(*sorted_segments = av_calloc(nb_segments, sizeof(**sorted_segments)))) {
1083 av_freep(sorted_segments);
1084 av_free(unsorted_segments);
1085 return AVERROR(ENOMEM);
1086 }
1087
1088 for (i = j = 0; i < mxf->metadata_sets_count; i++)
1089 if (mxf->metadata_sets[i]->type == IndexTableSegment)
1090 unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1091
1092 *nb_sorted_segments = 0;
1093
1094 /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1095 for (i = 0; i < nb_segments; i++) {
1096 int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1097 uint64_t best_index_duration = 0;
1098
1099 for (j = 0; j < nb_segments; j++) {
1100 MXFIndexTableSegment *s = unsorted_segments[j];
1101
1102 /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1103 * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1104 * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1105 */
1106 if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1107 (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1108 (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1109 best = j;
1110 best_body_sid = s->body_sid;
1111 best_index_sid = s->index_sid;
1112 best_index_start = s->index_start_position;
1113 best_index_duration = s->index_duration;
1114 }
1115 }
1116
1117 /* no suitable entry found -> we're done */
1118 if (best == -1)
1119 break;
1120
1121 (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1122 last_body_sid = best_body_sid;
1123 last_index_sid = best_index_sid;
1124 last_index_start = best_index_start;
1125 }
1126
1127 av_free(unsorted_segments);
1128
1129 return 0;
1130}
1131
1132/**
1133 * Computes the absolute file offset of the given essence container offset
1134 */
1135static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1136{
1137 int x;
1138 int64_t offset_in = offset; /* for logging */
1139
1140 for (x = 0; x < mxf->partitions_count; x++) {
1141 MXFPartition *p = &mxf->partitions[x];
1142
1143 if (p->body_sid != body_sid)
1144 continue;
1145
1146 if (offset < p->essence_length || !p->essence_length) {
1147 *offset_out = p->essence_offset + offset;
1148 return 0;
1149 }
1150
1151 offset -= p->essence_length;
1152 }
1153
1154 av_log(mxf->fc, AV_LOG_ERROR,
1155 "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1156 offset_in, body_sid);
1157
1158 return AVERROR_INVALIDDATA;
1159}
1160
1161/**
1162 * Returns the end position of the essence container with given BodySID, or zero if unknown
1163 */
1164static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1165{
1166 int x;
1167 int64_t ret = 0;
1168
1169 for (x = 0; x < mxf->partitions_count; x++) {
1170 MXFPartition *p = &mxf->partitions[x];
1171
1172 if (p->body_sid != body_sid)
1173 continue;
1174
1175 if (!p->essence_length)
1176 return 0;
1177
1178 ret = p->essence_offset + p->essence_length;
1179 }
1180
1181 return ret;
1182}
1183
1184/* EditUnit -> absolute offset */
1185static 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)
1186{
1187 int i;
1188 int64_t offset_temp = 0;
1189
1190 for (i = 0; i < index_table->nb_segments; i++) {
1191 MXFIndexTableSegment *s = index_table->segments[i];
1192
1193 edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1194
1195 if (edit_unit < s->index_start_position + s->index_duration) {
1196 int64_t index = edit_unit - s->index_start_position;
1197
1198 if (s->edit_unit_byte_count)
1199 offset_temp += s->edit_unit_byte_count * index;
1200 else if (s->nb_index_entries) {
1201 if (s->nb_index_entries == 2 * s->index_duration + 1)
1202 index *= 2; /* Avid index */
1203
1204 if (index < 0 || index >= s->nb_index_entries) {
1205 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1206 index_table->index_sid, s->index_start_position);
1207 return AVERROR_INVALIDDATA;
1208 }
1209
1210 offset_temp = s->stream_offset_entries[index];
1211 } else {
1212 av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1213 index_table->index_sid, s->index_start_position);
1214 return AVERROR_INVALIDDATA;
1215 }
1216
1217 if (edit_unit_out)
1218 *edit_unit_out = edit_unit;
1219
1220 return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1221 } else {
1222 /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1223 offset_temp += s->edit_unit_byte_count * s->index_duration;
1224 }
1225 }
1226
1227 if (nag)
1228 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);
1229
1230 return AVERROR_INVALIDDATA;
1231}
1232
1233static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
1234{
1235 int i, j, x;
1236 int8_t max_temporal_offset = -128;
1237
1238 /* first compute how many entries we have */
1239 for (i = 0; i < index_table->nb_segments; i++) {
1240 MXFIndexTableSegment *s = index_table->segments[i];
1241
1242 if (!s->nb_index_entries) {
1243 index_table->nb_ptses = 0;
1244 return 0; /* no TemporalOffsets */
1245 }
1246
1247 index_table->nb_ptses += s->index_duration;
1248 }
1249
1250 /* paranoid check */
1251 if (index_table->nb_ptses <= 0)
1252 return 0;
1253
1254 if (!(index_table->ptses = av_calloc(index_table->nb_ptses, sizeof(int64_t))) ||
1255 !(index_table->fake_index = av_calloc(index_table->nb_ptses, sizeof(AVIndexEntry)))) {
1256 av_freep(&index_table->ptses);
1257 return AVERROR(ENOMEM);
1258 }
1259
1260 /* we may have a few bad TemporalOffsets
1261 * make sure the corresponding PTSes don't have the bogus value 0 */
1262 for (x = 0; x < index_table->nb_ptses; x++)
1263 index_table->ptses[x] = AV_NOPTS_VALUE;
1264
1265 /**
1266 * We have this:
1267 *
1268 * x TemporalOffset
1269 * 0: 0
1270 * 1: 1
1271 * 2: 1
1272 * 3: -2
1273 * 4: 1
1274 * 5: 1
1275 * 6: -2
1276 *
1277 * We want to transform it into this:
1278 *
1279 * x DTS PTS
1280 * 0: -1 0
1281 * 1: 0 3
1282 * 2: 1 1
1283 * 3: 2 2
1284 * 4: 3 6
1285 * 5: 4 4
1286 * 6: 5 5
1287 *
1288 * We do this by bucket sorting x by x+TemporalOffset[x] into mxf->ptses,
1289 * then settings mxf->first_dts = -max(TemporalOffset[x]).
1290 * The latter makes DTS <= PTS.
1291 */
1292 for (i = x = 0; i < index_table->nb_segments; i++) {
1293 MXFIndexTableSegment *s = index_table->segments[i];
1294 int index_delta = 1;
1295 int n = s->nb_index_entries;
1296
1297 if (s->nb_index_entries == 2 * s->index_duration + 1) {
1298 index_delta = 2; /* Avid index */
1299 /* ignore the last entry - it's the size of the essence container */
1300 n--;
1301 }
1302
1303 for (j = 0; j < n; j += index_delta, x++) {
1304 int offset = s->temporal_offset_entries[j] / index_delta;
1305 int index = x + offset;
1306
1307 if (x >= index_table->nb_ptses) {
1308 av_log(mxf->fc, AV_LOG_ERROR,
1309 "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1310 s->nb_index_entries, s->index_duration);
1311 break;
1312 }
1313
1314 index_table->fake_index[x].timestamp = x;
1315 index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1316
1317 if (index < 0 || index >= index_table->nb_ptses) {
1318 av_log(mxf->fc, AV_LOG_ERROR,
1319 "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1320 x, offset, index);
1321 continue;
1322 }
1323
1324 index_table->ptses[index] = x;
1325 max_temporal_offset = FFMAX(max_temporal_offset, offset);
1326 }
1327 }
1328
1329 index_table->first_dts = -max_temporal_offset;
1330
1331 return 0;
1332}
1333
1334/**
1335 * Sorts and collects index table segments into index tables.
1336 * Also computes PTSes if possible.
1337 */
1338static int mxf_compute_index_tables(MXFContext *mxf)
1339{
1340 int i, j, k, ret, nb_sorted_segments;
1341 MXFIndexTableSegment **sorted_segments = NULL;
1342
1343 if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1344 nb_sorted_segments <= 0) {
1345 av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1346 return 0;
1347 }
1348
1349 /* sanity check and count unique BodySIDs/IndexSIDs */
1350 for (i = 0; i < nb_sorted_segments; i++) {
1351 if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1352 mxf->nb_index_tables++;
1353 else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1354 av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1355 ret = AVERROR_INVALIDDATA;
1356 goto finish_decoding_index;
1357 }
1358 }
1359
1360 mxf->index_tables = av_mallocz_array(mxf->nb_index_tables,
1361 sizeof(*mxf->index_tables));
1362 if (!mxf->index_tables) {
1363 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1364 ret = AVERROR(ENOMEM);
1365 goto finish_decoding_index;
1366 }
1367
1368 /* distribute sorted segments to index tables */
1369 for (i = j = 0; i < nb_sorted_segments; i++) {
1370 if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1371 /* next IndexSID */
1372 j++;
1373 }
1374
1375 mxf->index_tables[j].nb_segments++;
1376 }
1377
1378 for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1379 MXFIndexTable *t = &mxf->index_tables[j];
1380
1381 t->segments = av_mallocz_array(t->nb_segments,
1382 sizeof(*t->segments));
1383
1384 if (!t->segments) {
1385 av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1386 " pointer array\n");
1387 ret = AVERROR(ENOMEM);
1388 goto finish_decoding_index;
1389 }
1390
1391 if (sorted_segments[i]->index_start_position)
1392 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1393 sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1394
1395 memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1396 t->index_sid = sorted_segments[i]->index_sid;
1397 t->body_sid = sorted_segments[i]->body_sid;
1398
1399 if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1400 goto finish_decoding_index;
1401
1402 /* fix zero IndexDurations */
1403 for (k = 0; k < t->nb_segments; k++) {
1404 if (t->segments[k]->index_duration)
1405 continue;
1406
1407 if (t->nb_segments > 1)
1408 av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1409 t->index_sid, k);
1410
1411 if (mxf->fc->nb_streams <= 0) {
1412 av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1413 break;
1414 }
1415
1416 /* assume the first stream's duration is reasonable
1417 * leave index_duration = 0 on further segments in case we have any (unlikely)
1418 */
1419 t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1420 break;
1421 }
1422 }
1423
1424 ret = 0;
1425finish_decoding_index:
1426 av_free(sorted_segments);
1427 return ret;
1428}
1429
1430static int mxf_is_intra_only(MXFDescriptor *descriptor)
1431{
1432 return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1433 &descriptor->essence_container_ul)->id != AV_CODEC_ID_NONE ||
1434 mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1435 &descriptor->essence_codec_ul)->id != AV_CODEC_ID_NONE;
1436}
1437
1438static int mxf_uid_to_str(UID uid, char **str)
1439{
1440 int i;
1441 char *p;
1442 p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1443 if (!p)
1444 return AVERROR(ENOMEM);
1445 for (i = 0; i < sizeof(UID); i++) {
1446 snprintf(p, 2 + 1, "%.2x", uid[i]);
1447 p += 2;
1448 if (i == 3 || i == 5 || i == 7 || i == 9) {
1449 snprintf(p, 1 + 1, "-");
1450 p++;
1451 }
1452 }
1453 return 0;
1454}
1455
1456static int mxf_add_uid_metadata(AVDictionary **pm, const char *key, UID uid)
1457{
1458 char *str;
1459 int ret;
1460 if ((ret = mxf_uid_to_str(uid, &str)) < 0)
1461 return ret;
1462 av_dict_set(pm, key, str, AV_DICT_DONT_STRDUP_VAL);
1463 return 0;
1464}
1465
1466static int mxf_add_timecode_metadata(AVDictionary **pm, const char *key, AVTimecode *tc)
1467{
1468 char buf[AV_TIMECODE_STR_SIZE];
1469 av_dict_set(pm, key, av_timecode_make_string(tc, buf, 0), 0);
1470
1471 return 0;
1472}
1473
1474static MXFTimecodeComponent* mxf_resolve_timecode_component(MXFContext *mxf, UID *strong_ref)
1475{
1476 MXFStructuralComponent *component = NULL;
1477 MXFPulldownComponent *pulldown = NULL;
1478
1479 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1480 if (!component)
1481 return NULL;
1482
1483 switch (component->type) {
1484 case TimecodeComponent:
1485 return (MXFTimecodeComponent*)component;
1486 case PulldownComponent: /* timcode component may be located on a pulldown component */
1487 pulldown = (MXFPulldownComponent*)component;
1488 return mxf_resolve_strong_ref(mxf, &pulldown->input_segment_ref, TimecodeComponent);
1489 default:
1490 break;
1491 }
1492 return NULL;
1493}
1494
1495static MXFPackage* mxf_resolve_source_package(MXFContext *mxf, UID package_uid)
1496{
1497 MXFPackage *package = NULL;
1498 int i;
1499
1500 for (i = 0; i < mxf->packages_count; i++) {
1501 package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], SourcePackage);
1502 if (!package)
1503 continue;
1504
1505 if (!memcmp(package->package_uid, package_uid, 16))
1506 return package;
1507 }
1508 return NULL;
1509}
1510
1511static MXFStructuralComponent* mxf_resolve_essence_group_choice(MXFContext *mxf, MXFEssenceGroup *essence_group)
1512{
1513 MXFStructuralComponent *component = NULL;
1514 MXFPackage *package = NULL;
1515 MXFDescriptor *descriptor = NULL;
1516 int i;
1517
1518 if (!essence_group || !essence_group->structural_components_count)
1519 return NULL;
1520
1521 /* essence groups contains multiple representations of the same media,
1522 this return the first components with a valid Descriptor typically index 0 */
1523 for (i =0; i < essence_group->structural_components_count; i++){
1524 component = mxf_resolve_strong_ref(mxf, &essence_group->structural_components_refs[i], SourceClip);
1525 if (!component)
1526 continue;
1527
1528 if (!(package = mxf_resolve_source_package(mxf, component->source_package_uid)))
1529 continue;
1530
1531 descriptor = mxf_resolve_strong_ref(mxf, &package->descriptor_ref, Descriptor);
1532 if (descriptor){
1533 /* HACK: force the duration of the component to match the duration of the descriptor */
1534 if (descriptor->duration != AV_NOPTS_VALUE)
1535 component->duration = descriptor->duration;
1536 return component;
1537 }
1538 }
1539 return NULL;
1540}
1541
1542static MXFStructuralComponent* mxf_resolve_sourceclip(MXFContext *mxf, UID *strong_ref)
1543{
1544 MXFStructuralComponent *component = NULL;
1545
1546 component = mxf_resolve_strong_ref(mxf, strong_ref, AnyType);
1547 if (!component)
1548 return NULL;
1549 switch (component->type) {
1550 case SourceClip:
1551 return component;
1552 case EssenceGroup:
1553 return mxf_resolve_essence_group_choice(mxf, (MXFEssenceGroup*) component);
1554 default:
1555 break;
1556 }
1557 return NULL;
1558}
1559
1560static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_track, AVStream *st)
1561{
1562 MXFPackage *physical_package = NULL;
1563 MXFTrack *physical_track = NULL;
1564 MXFStructuralComponent *sourceclip = NULL;
1565 MXFTimecodeComponent *mxf_tc = NULL;
1566 int i, j, k;
1567 AVTimecode tc;
1568 int flags;
1569 int64_t start_position;
1570
1571 for (i = 0; i < source_track->sequence->structural_components_count; i++) {
1572 sourceclip = mxf_resolve_strong_ref(mxf, &source_track->sequence->structural_components_refs[i], SourceClip);
1573 if (!sourceclip)
1574 continue;
1575
1576 if (!(physical_package = mxf_resolve_source_package(mxf, sourceclip->source_package_uid)))
1577 break;
1578
1579 mxf_add_uid_metadata(&st->metadata, "reel_uid", physical_package->package_uid);
1580
1581 /* the name of physical source package is name of the reel or tape */
1582 if (physical_package->name && physical_package->name[0])
1583 av_dict_set(&st->metadata, "reel_name", physical_package->name, 0);
1584
1585 /* the source timecode is calculated by adding the start_position of the sourceclip from the file source package track
1586 * to the start_frame of the timecode component located on one of the tracks of the physical source package.
1587 */
1588 for (j = 0; j < physical_package->tracks_count; j++) {
1589 if (!(physical_track = mxf_resolve_strong_ref(mxf, &physical_package->tracks_refs[j], Track))) {
1590 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1591 continue;
1592 }
1593
1594 if (!(physical_track->sequence = mxf_resolve_strong_ref(mxf, &physical_track->sequence_ref, Sequence))) {
1595 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1596 continue;
1597 }
1598
1599 for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
1600 if (!(mxf_tc = mxf_resolve_timecode_component(mxf, &physical_track->sequence->structural_components_refs[k])))
1601 continue;
1602
1603 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1604 /* scale sourceclip start_position to match physical track edit rate */
1605 start_position = av_rescale_q(sourceclip->start_position,
1606 physical_track->edit_rate,
1607 source_track->edit_rate);
1608
1609 if (av_timecode_init(&tc, mxf_tc->rate, flags, start_position + mxf_tc->start_frame, mxf->fc) == 0) {
1610 mxf_add_timecode_metadata(&st->metadata, "timecode", &tc);
1611 return 0;
1612 }
1613 }
1614 }
1615 }
1616
1617 return 0;
1618}
1619
1620static int mxf_parse_structural_metadata(MXFContext *mxf)
1621{
1622 MXFPackage *material_package = NULL;
1623 int i, j, k, ret;
1624
1625 av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1626 /* TODO: handle multiple material packages (OP3x) */
1627 for (i = 0; i < mxf->packages_count; i++) {
1628 material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1629 if (material_package) break;
1630 }
1631 if (!material_package) {
1632 av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1633 return AVERROR_INVALIDDATA;
1634 }
1635
1636 mxf_add_uid_metadata(&mxf->fc->metadata, "material_package_uid", material_package->package_uid);
1637 if (material_package->name && material_package->name[0])
1638 av_dict_set(&mxf->fc->metadata, "material_package_name", material_package->name, 0);
1639
1640 for (i = 0; i < material_package->tracks_count; i++) {
1641 MXFPackage *source_package = NULL;
1642 MXFTrack *material_track = NULL;
1643 MXFTrack *source_track = NULL;
1644 MXFTrack *temp_track = NULL;
1645 MXFDescriptor *descriptor = NULL;
1646 MXFStructuralComponent *component = NULL;
1647 MXFTimecodeComponent *mxf_tc = NULL;
1648 UID *essence_container_ul = NULL;
1649 const MXFCodecUL *codec_ul = NULL;
1650 const MXFCodecUL *container_ul = NULL;
1651 const MXFCodecUL *pix_fmt_ul = NULL;
1652 AVStream *st;
1653 AVTimecode tc;
1654 int flags;
1655
1656 if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1657 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1658 continue;
1659 }
1660
1661 if ((component = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, TimecodeComponent))) {
1662 mxf_tc = (MXFTimecodeComponent*)component;
1663 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1664 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1665 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1666 }
1667 }
1668
1669 if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1670 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1671 continue;
1672 }
1673
1674 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1675 component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], TimecodeComponent);
1676 if (!component)
1677 continue;
1678
1679 mxf_tc = (MXFTimecodeComponent*)component;
1680 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
1681 if (av_timecode_init(&tc, mxf_tc->rate, flags, mxf_tc->start_frame, mxf->fc) == 0) {
1682 mxf_add_timecode_metadata(&mxf->fc->metadata, "timecode", &tc);
1683 break;
1684 }
1685 }
1686
1687 /* TODO: handle multiple source clips */
1688 for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1689 component = mxf_resolve_sourceclip(mxf, &material_track->sequence->structural_components_refs[j]);
1690 if (!component)
1691 continue;
1692
1693 source_package = mxf_resolve_source_package(mxf, component->source_package_uid);
1694 if (!source_package) {
1695 av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1696 break;
1697 }
1698 for (k = 0; k < source_package->tracks_count; k++) {
1699 if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1700 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1701 ret = AVERROR_INVALIDDATA;
1702 goto fail_and_free;
1703 }
1704 if (temp_track->track_id == component->source_track_id) {
1705 source_track = temp_track;
1706 break;
1707 }
1708 }
1709 if (!source_track) {
1710 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1711 break;
1712 }
1713 }
1714 if (!source_track || !component)
1715 continue;
1716
1717 if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1718 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1719 ret = AVERROR_INVALIDDATA;
1720 goto fail_and_free;
1721 }
1722
1723 /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1724 * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1725 if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1726 av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1727 continue;
1728 }
1729
1730 st = avformat_new_stream(mxf->fc, NULL);
1731 if (!st) {
1732 av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1733 ret = AVERROR(ENOMEM);
1734 goto fail_and_free;
1735 }
1736 st->id = source_track->track_id;
1737 st->priv_data = source_track;
1738 source_track->original_duration = st->duration = component->duration;
1739 if (st->duration == -1)
1740 st->duration = AV_NOPTS_VALUE;
1741 st->start_time = component->start_position;
1742 if (material_track->edit_rate.num <= 0 ||
1743 material_track->edit_rate.den <= 0) {
1744 av_log(mxf->fc, AV_LOG_WARNING,
1745 "Invalid edit rate (%d/%d) found on stream #%d, "
1746 "defaulting to 25/1\n",
1747 material_track->edit_rate.num,
1748 material_track->edit_rate.den, st->index);
1749 material_track->edit_rate = (AVRational){25, 1};
1750 }
1751 avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1752
1753 /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1754 * the former is accessible via st->priv_data */
1755 source_track->edit_rate = material_track->edit_rate;
1756
1757 PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1758 codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
1759 st->codec->codec_type = codec_ul->id;
1760
1761 source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1762 if (source_package->descriptor) {
1763 if (source_package->descriptor->type == MultipleDescriptor) {
1764 for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1765 MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1766
1767 if (!sub_descriptor) {
1768 av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1769 continue;
1770 }
1771 if (sub_descriptor->linked_track_id == source_track->track_id) {
1772 descriptor = sub_descriptor;
1773 break;
1774 }
1775 }
1776 } else if (source_package->descriptor->type == Descriptor)
1777 descriptor = source_package->descriptor;
1778 }
1779 if (!descriptor) {
1780 av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1781 continue;
1782 }
1783 PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1784 PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1785 essence_container_ul = &descriptor->essence_container_ul;
1786 /* HACK: replacing the original key with mxf_encrypted_essence_container
1787 * is not allowed according to s429-6, try to find correct information anyway */
1788 if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1789 av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1790 for (k = 0; k < mxf->metadata_sets_count; k++) {
1791 MXFMetadataSet *metadata = mxf->metadata_sets[k];
1792 if (metadata->type == CryptoContext) {
1793 essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1794 break;
1795 }
1796 }
1797 }
1798
1799 /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1800 codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1801 st->codec->codec_id = (enum AVCodecID)codec_ul->id;
1802 av_log(mxf->fc, AV_LOG_VERBOSE, "%s: Universal Label: ",
1803 avcodec_get_name(st->codec->codec_id));
1804 for (k = 0; k < 16; k++) {
1805 av_log(mxf->fc, AV_LOG_VERBOSE, "%.2x",
1806 descriptor->essence_codec_ul[k]);
1807 if (!(k+1 & 19) || k == 5)
1808 av_log(mxf->fc, AV_LOG_VERBOSE, ".");
1809 }
1810 av_log(mxf->fc, AV_LOG_VERBOSE, "\n");
1811
1812 mxf_add_uid_metadata(&st->metadata, "file_package_uid", source_package->package_uid);
1813 if (source_package->name && source_package->name[0])
1814 av_dict_set(&st->metadata, "file_package_name", source_package->name, 0);
1815
1816 mxf_parse_physical_source_package(mxf, source_track, st);
1817
1818 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1819 source_track->intra_only = mxf_is_intra_only(descriptor);
1820 container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1821 if (st->codec->codec_id == AV_CODEC_ID_NONE)
1822 st->codec->codec_id = container_ul->id;
1823 st->codec->width = descriptor->width;
1824 st->codec->height = descriptor->height; /* Field height, not frame height */
1825 switch (descriptor->frame_layout) {
1826 case SegmentedFrame:
1827 /* This one is a weird layout I don't fully understand. */
1828 av_log(mxf->fc, AV_LOG_INFO, "SegmentedFrame layout isn't currently supported\n");
1829 break;
1830 case FullFrame:
1831 st->codec->field_order = AV_FIELD_PROGRESSIVE;
1832 break;
1833 case OneField:
1834 /* Every other line is stored and needs to be duplicated. */
1835 av_log(mxf->fc, AV_LOG_INFO, "OneField frame layout isn't currently supported\n");
1836 break; /* The correct thing to do here is fall through, but by breaking we might be
1837 able to decode some streams at half the vertical resolution, rather than not al all.
1838 It's also for compatibility with the old behavior. */
1839 case MixedFields:
1840 break;
1841 case SeparateFields:
1842 switch (descriptor->field_dominance) {
1843 case MXF_TFF:
1844 st->codec->field_order = AV_FIELD_TT;
1845 break;
1846 case MXF_BFF:
1847 st->codec->field_order = AV_FIELD_BB;
1848 break;
1849 default:
1850 avpriv_request_sample(mxf->fc,
1851 "Field dominance %d support",
1852 descriptor->field_dominance);
1853 case 0: // we already have many samples with field_dominance == unknown
1854 break;
1855 }
1856 /* Turn field height into frame height. */
1857 st->codec->height *= 2;
1858 break;
1859 default:
1860 av_log(mxf->fc, AV_LOG_INFO, "Unknown frame layout type: %d\n", descriptor->frame_layout);
1861 }
1862 if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1863 st->codec->pix_fmt = descriptor->pix_fmt;
1864 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1865 pix_fmt_ul = mxf_get_codec_ul(ff_mxf_pixel_format_uls,
1866 &descriptor->essence_codec_ul);
1867 st->codec->pix_fmt = (enum AVPixelFormat)pix_fmt_ul->id;
1868 if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1869 /* support files created before RP224v10 by defaulting to UYVY422
1870 if subsampling is 4:2:2 and component depth is 8-bit */
1871 if (descriptor->horiz_subsampling == 2 &&
1872 descriptor->vert_subsampling == 1 &&
1873 descriptor->component_depth == 8) {
1874 st->codec->pix_fmt = AV_PIX_FMT_UYVY422;
1875 }
1876 }
1877 }
1878 }
1879 st->need_parsing = AVSTREAM_PARSE_HEADERS;
1880 if (material_track->sequence->origin) {
1881 av_dict_set_int(&st->metadata, "material_track_origin", material_track->sequence->origin, 0);
1882 }
1883 if (source_track->sequence->origin) {
1884 av_dict_set_int(&st->metadata, "source_track_origin", source_track->sequence->origin, 0);
1885 }
1886 if (descriptor->aspect_ratio.num && descriptor->aspect_ratio.den)
1887 st->display_aspect_ratio = descriptor->aspect_ratio;
1888 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1889 container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1890 /* Only overwrite existing codec ID if it is unset or A-law, which is the default according to SMPTE RP 224. */
1891 if (st->codec->codec_id == AV_CODEC_ID_NONE || (st->codec->codec_id == AV_CODEC_ID_PCM_ALAW && (enum AVCodecID)container_ul->id != AV_CODEC_ID_NONE))
1892 st->codec->codec_id = (enum AVCodecID)container_ul->id;
1893 st->codec->channels = descriptor->channels;
1894 st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1895
1896 if (descriptor->sample_rate.den > 0) {
1897 st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1898 avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1899 } else {
1900 av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1901 "found for stream #%d, time base forced to 1/48000\n",
1902 descriptor->sample_rate.num, descriptor->sample_rate.den,
1903 st->index);
1904 avpriv_set_pts_info(st, 64, 1, 48000);
1905 }
1906
1907 /* if duration is set, rescale it from EditRate to SampleRate */
1908 if (st->duration != AV_NOPTS_VALUE)
1909 st->duration = av_rescale_q(st->duration,
1910 av_inv_q(material_track->edit_rate),
1911 st->time_base);
1912
1913 /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1914 if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1915 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1916 st->codec->codec_id = AV_CODEC_ID_PCM_S24LE;
1917 else if (descriptor->bits_per_sample == 32)
1918 st->codec->codec_id = AV_CODEC_ID_PCM_S32LE;
1919 } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1920 if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1921 st->codec->codec_id = AV_CODEC_ID_PCM_S24BE;
1922 else if (descriptor->bits_per_sample == 32)
1923 st->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
1924 } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1925 st->need_parsing = AVSTREAM_PARSE_FULL;
1926 }
1927 } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1928 int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
1929 essence_container_ul)->id;
1930 if (codec_id >= 0 &&
1931 codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
1932 av_dict_set(&st->metadata, "data_type",
1933 mxf_data_essence_descriptor[codec_id], 0);
1934 }
1935 }
1936 if (descriptor->extradata) {
1937 if (!ff_alloc_extradata(st->codec, descriptor->extradata_size)) {
1938 memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1939 }
1940 } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1941 ret = ff_generate_avci_extradata(st);
1942 if (ret < 0)
1943 return ret;
1944 }
1945 if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1946 /* TODO: decode timestamps */
1947 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
1948 }
1949 }
1950
1951 ret = 0;
1952fail_and_free:
1953 return ret;
1954}
1955
1956static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1957{
1958 struct tm time = { 0 };
1959 time.tm_year = (timestamp >> 48) - 1900;
1960 time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1961 time.tm_mday = (timestamp >> 32 & 0xFF);
1962 time.tm_hour = (timestamp >> 24 & 0xFF);
1963 time.tm_min = (timestamp >> 16 & 0xFF);
1964 time.tm_sec = (timestamp >> 8 & 0xFF);
1965
1966 /* msvcrt versions of strftime calls the invalid parameter handler
1967 * (aborting the process if one isn't set) if the parameters are out
1968 * of range. */
1969 time.tm_mon = av_clip(time.tm_mon, 0, 11);
1970 time.tm_mday = av_clip(time.tm_mday, 1, 31);
1971 time.tm_hour = av_clip(time.tm_hour, 0, 23);
1972 time.tm_min = av_clip(time.tm_min, 0, 59);
1973 time.tm_sec = av_clip(time.tm_sec, 0, 59);
1974
1975 *str = av_mallocz(32);
1976 if (!*str)
1977 return AVERROR(ENOMEM);
1978 if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
1979 str[0] = '\0';
1980
1981 return 0;
1982}
1983
1984#define SET_STR_METADATA(pb, name, str) do { \
1985 if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1986 return ret; \
1987 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1988} while (0)
1989
1990#define SET_UID_METADATA(pb, name, var, str) do { \
1991 avio_read(pb, var, 16); \
1992 if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1993 return ret; \
1994 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1995} while (0)
1996
1997#define SET_TS_METADATA(pb, name, var, str) do { \
1998 var = avio_rb64(pb); \
1999 if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
2000 return ret; \
2001 av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
2002} while (0)
2003
2004static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
2005{
2006 MXFContext *mxf = arg;
2007 AVFormatContext *s = mxf->fc;
2008 int ret;
2009 UID uid = { 0 };
2010 char *str = NULL;
2011 uint64_t ts;
2012 switch (tag) {
2013 case 0x3C01:
2014 SET_STR_METADATA(pb, "company_name", str);
2015 break;
2016 case 0x3C02:
2017 SET_STR_METADATA(pb, "product_name", str);
2018 break;
2019 case 0x3C04:
2020 SET_STR_METADATA(pb, "product_version", str);
2021 break;
2022 case 0x3C05:
2023 SET_UID_METADATA(pb, "product_uid", uid, str);
2024 break;
2025 case 0x3C06:
2026 SET_TS_METADATA(pb, "modification_date", ts, str);
2027 break;
2028 case 0x3C08:
2029 SET_STR_METADATA(pb, "application_platform", str);
2030 break;
2031 case 0x3C09:
2032 SET_UID_METADATA(pb, "generation_uid", uid, str);
2033 break;
2034 case 0x3C0A:
2035 SET_UID_METADATA(pb, "uid", uid, str);
2036 break;
2037 }
2038 return 0;
2039}
2040
2041static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
2042 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
2043 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
2044 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
2045 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
2046 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
2047 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
2048 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
2049 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
2050 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
2051 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
2052 { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
2053 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
2054 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
2055 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_package, sizeof(MXFPackage), SourcePackage },
2056 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_package, sizeof(MXFPackage), MaterialPackage },
2057 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0f,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
2058 { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0D,0x01,0x01,0x01,0x01,0x01,0x05,0x00 }, mxf_read_essence_group, sizeof(MXFEssenceGroup), EssenceGroup},
2059 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
2060 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
2061 { { 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 */
2062 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
2063 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
2064 { { 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 */
2065 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
2066 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
2067 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
2068 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5c,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* VANC/VBI - SMPTE 436M */
2069 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
2070 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
2071 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
2072 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
2073 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
2074 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
2075 { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
2076 { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
2077};
2078
2079static int mxf_metadataset_init(MXFMetadataSet *ctx, enum MXFMetadataSetType type)
2080{
2081 switch (type){
2082 case MultipleDescriptor:
2083 case Descriptor:
2084 ((MXFDescriptor*)ctx)->pix_fmt = AV_PIX_FMT_NONE;
2085 ((MXFDescriptor*)ctx)->duration = AV_NOPTS_VALUE;
2086 break;
2087 default:
2088 break;
2089 }
2090 return 0;
2091}
2092
2093static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
2094{
2095 AVIOContext *pb = mxf->fc->pb;
2096 MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
2097 uint64_t klv_end = avio_tell(pb) + klv->length;
2098
2099 if (!ctx)
2100 return AVERROR(ENOMEM);
2101 mxf_metadataset_init(ctx, type);
2102 while (avio_tell(pb) + 4 < klv_end && !avio_feof(pb)) {
2103 int ret;
2104 int tag = avio_rb16(pb);
2105 int size = avio_rb16(pb); /* KLV specified by 0x53 */
2106 uint64_t next = avio_tell(pb) + size;
2107 UID uid = {0};
2108
2109 av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
2110 if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
2111 av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
2112 continue;
2113 }
2114 if (tag > 0x7FFF) { /* dynamic tag */
2115 int i;
2116 for (i = 0; i < mxf->local_tags_count; i++) {
2117 int local_tag = AV_RB16(mxf->local_tags+i*18);
2118 if (local_tag == tag) {
2119 memcpy(uid, mxf->local_tags+i*18+2, 16);
2120 av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
2121 PRINT_KEY(mxf->fc, "uid", uid);
2122 }
2123 }
2124 }
2125 if (ctx_size && tag == 0x3C0A)
2126 avio_read(pb, ctx->uid, 16);
2127 else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
2128 return ret;
2129
2130 /* Accept the 64k local set limit being exceeded (Avid). Don't accept
2131 * it extending past the end of the KLV though (zzuf5.mxf). */
2132 if (avio_tell(pb) > klv_end) {
2133 if (ctx_size)
2134 av_free(ctx);
2135
2136 av_log(mxf->fc, AV_LOG_ERROR,
2137 "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
2138 tag, klv->offset);
2139 return AVERROR_INVALIDDATA;
2140 } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
2141 avio_seek(pb, next, SEEK_SET);
2142 }
2143 if (ctx_size) ctx->type = type;
2144 return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
2145}
2146
2147/**
2148 * Matches any partition pack key, in other words:
2149 * - HeaderPartition
2150 * - BodyPartition
2151 * - FooterPartition
2152 * @return non-zero if the key is a partition pack key, zero otherwise
2153 */
2154static int mxf_is_partition_pack_key(UID key)
2155{
2156 //NOTE: this is a little lax since it doesn't constraint key[14]
2157 return !memcmp(key, mxf_header_partition_pack_key, 13) &&
2158 key[13] >= 2 && key[13] <= 4;
2159}
2160
2161/**
2162 * Parses a metadata KLV
2163 * @return <0 on error, 0 otherwise
2164 */
2165static int mxf_parse_klv(MXFContext *mxf, KLVPacket klv, MXFMetadataReadFunc *read,
2166 int ctx_size, enum MXFMetadataSetType type)
2167{
2168 AVFormatContext *s = mxf->fc;
2169 int res;
2170 if (klv.key[5] == 0x53) {
2171 res = mxf_read_local_tags(mxf, &klv, read, ctx_size, type);
2172 } else {
2173 uint64_t next = avio_tell(s->pb) + klv.length;
2174 res = read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2175
2176 /* only seek forward, else this can loop for a long time */
2177 if (avio_tell(s->pb) > next) {
2178 av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2179 klv.offset);
2180 return AVERROR_INVALIDDATA;
2181 }
2182
2183 avio_seek(s->pb, next, SEEK_SET);
2184 }
2185 if (res < 0) {
2186 av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2187 return res;
2188 }
2189 return 0;
2190}
2191
2192/**
2193 * Seeks to the previous partition and parses it, if possible
2194 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2195 */
2196static int mxf_seek_to_previous_partition(MXFContext *mxf)
2197{
2198 AVIOContext *pb = mxf->fc->pb;
2199 KLVPacket klv;
2200 int64_t current_partition_ofs;
2201 int ret;
2202
2203 if (!mxf->current_partition ||
2204 mxf->run_in + mxf->current_partition->previous_partition <= mxf->last_forward_tell)
2205 return 0; /* we've parsed all partitions */
2206
2207 /* seek to previous partition */
2208 current_partition_ofs = mxf->current_partition->pack_ofs; //includes run-in
2209 avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
2210 mxf->current_partition = NULL;
2211
2212 av_dlog(mxf->fc, "seeking to previous partition\n");
2213
2214 /* Make sure this is actually a PartitionPack, and if so parse it.
2215 * See deadlock2.mxf
2216 */
2217 if ((ret = klv_read_packet(&klv, pb)) < 0) {
2218 av_log(mxf->fc, AV_LOG_ERROR, "failed to read PartitionPack KLV\n");
2219 return ret;
2220 }
2221
2222 if (!mxf_is_partition_pack_key(klv.key)) {
2223 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition @ %" PRIx64 " isn't a PartitionPack\n", klv.offset);
2224 return AVERROR_INVALIDDATA;
2225 }
2226
2227 /* We can't just check ofs >= current_partition_ofs because PreviousPartition
2228 * can point to just before the current partition, causing klv_read_packet()
2229 * to sync back up to it. See deadlock3.mxf
2230 */
2231 if (klv.offset >= current_partition_ofs) {
2232 av_log(mxf->fc, AV_LOG_ERROR, "PreviousPartition for PartitionPack @ %"
2233 PRIx64 " indirectly points to itself\n", current_partition_ofs);
2234 return AVERROR_INVALIDDATA;
2235 }
2236
2237 if ((ret = mxf_parse_klv(mxf, klv, mxf_read_partition_pack, 0, 0)) < 0)
2238 return ret;
2239
2240 return 1;
2241}
2242
2243/**
2244 * Called when essence is encountered
2245 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2246 */
2247static int mxf_parse_handle_essence(MXFContext *mxf)
2248{
2249 AVIOContext *pb = mxf->fc->pb;
2250 int64_t ret;
2251
2252 if (mxf->parsing_backward) {
2253 return mxf_seek_to_previous_partition(mxf);
2254 } else {
2255 if (!mxf->footer_partition) {
2256 av_dlog(mxf->fc, "no FooterPartition\n");
2257 return 0;
2258 }
2259
2260 av_dlog(mxf->fc, "seeking to FooterPartition\n");
2261
2262 /* remember where we were so we don't end up seeking further back than this */
2263 mxf->last_forward_tell = avio_tell(pb);
2264
2265 if (!pb->seekable) {
2266 av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing FooterPartition\n");
2267 return -1;
2268 }
2269
2270 /* seek to FooterPartition and parse backward */
2271 if ((ret = avio_seek(pb, mxf->run_in + mxf->footer_partition, SEEK_SET)) < 0) {
2272 av_log(mxf->fc, AV_LOG_ERROR,
2273 "failed to seek to FooterPartition @ 0x%" PRIx64
2274 " (%"PRId64") - partial file?\n",
2275 mxf->run_in + mxf->footer_partition, ret);
2276 return ret;
2277 }
2278
2279 mxf->current_partition = NULL;
2280 mxf->parsing_backward = 1;
2281 }
2282
2283 return 1;
2284}
2285
2286/**
2287 * Called when the next partition or EOF is encountered
2288 * @return <= 0 if we should stop parsing, > 0 if we should keep going
2289 */
2290static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
2291{
2292 return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
2293}
2294
2295/**
2296 * Figures out the proper offset and length of the essence container in each partition
2297 */
2298static void mxf_compute_essence_containers(MXFContext *mxf)
2299{
2300 int x;
2301
2302 /* everything is already correct */
2303 if (mxf->op == OPAtom)
2304 return;
2305
2306 for (x = 0; x < mxf->partitions_count; x++) {
2307 MXFPartition *p = &mxf->partitions[x];
2308
2309 if (!p->body_sid)
2310 continue; /* BodySID == 0 -> no essence */
2311
2312 if (x >= mxf->partitions_count - 1)
2313 break; /* FooterPartition - can't compute length (and we don't need to) */
2314
2315 /* essence container spans to the next partition */
2316 p->essence_length = mxf->partitions[x+1].this_partition - p->essence_offset;
2317
2318 if (p->essence_length < 0) {
2319 /* next ThisPartition < essence_offset */
2320 p->essence_length = 0;
2321 av_log(mxf->fc, AV_LOG_ERROR,
2322 "partition %i: bad ThisPartition = %"PRIX64"\n",
2323 x+1, mxf->partitions[x+1].this_partition);
2324 }
2325 }
2326}
2327
2328static int64_t round_to_kag(int64_t position, int kag_size)
2329{
2330 /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2331 /* NOTE: kag_size may be any integer between 1 - 2^10 */
2332 int64_t ret = (position / kag_size) * kag_size;
2333 return ret == position ? ret : ret + kag_size;
2334}
2335
2336static int is_pcm(enum AVCodecID codec_id)
2337{
2338 /* we only care about "normal" PCM codecs until we get samples */
2339 return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2340}
2341
2342/**
2343 * Deal with the case where for some audio atoms EditUnitByteCount is
2344 * very small (2, 4..). In those cases we should read more than one
2345 * sample per call to mxf_read_packet().
2346 */
2347static void mxf_handle_small_eubc(AVFormatContext *s)
2348{
2349 MXFContext *mxf = s->priv_data;
2350
2351 /* assuming non-OPAtom == frame wrapped
2352 * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2353 if (mxf->op != OPAtom)
2354 return;
2355
2356 /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2357 if (s->nb_streams != 1 ||
2358 s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO ||
2359 !is_pcm(s->streams[0]->codec->codec_id) ||
2360 mxf->nb_index_tables != 1 ||
2361 mxf->index_tables[0].nb_segments != 1 ||
2362 mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2363 return;
2364
2365 /* arbitrarily default to 48 kHz PAL audio frame size */
2366 /* TODO: We could compute this from the ratio between the audio
2367 * and video edit rates for 48 kHz NTSC we could use the
2368 * 1802-1802-1802-1802-1801 pattern. */
2369 mxf->edit_units_per_packet = 1920;
2370}
2371
2372static void mxf_read_random_index_pack(AVFormatContext *s)
2373{
2374 MXFContext *mxf = s->priv_data;
2375 uint32_t length;
2376 int64_t file_size, max_rip_length, min_rip_length;
2377 KLVPacket klv;
2378
2379 if (!s->pb->seekable)
2380 return;
2381
2382 file_size = avio_size(s->pb);
2383
2384 /* S377m says to check the RIP length for "silly" values, without defining "silly".
2385 * The limit below assumes a file with nothing but partition packs and a RIP.
2386 * Before changing this, consider that a muxer may place each sample in its own partition.
2387 *
2388 * 105 is the size of the smallest possible PartitionPack
2389 * 12 is the size of each RIP entry
2390 * 28 is the size of the RIP header and footer, assuming an 8-byte BER
2391 */
2392 max_rip_length = ((file_size - mxf->run_in) / 105) * 12 + 28;
2393 max_rip_length = FFMIN(max_rip_length, INT_MAX); //2 GiB and up is also silly
2394
2395 /* We're only interested in RIPs with at least two entries.. */
2396 min_rip_length = 16+1+24+4;
2397
2398 /* See S377m section 11 */
2399 avio_seek(s->pb, file_size - 4, SEEK_SET);
2400 length = avio_rb32(s->pb);
2401
2402 if (length < min_rip_length || length > max_rip_length)
2403 goto end;
2404 avio_seek(s->pb, file_size - length, SEEK_SET);
2405 if (klv_read_packet(&klv, s->pb) < 0 ||
2406 !IS_KLV_KEY(klv.key, mxf_random_index_pack_key) ||
2407 klv.length != length - 20)
2408 goto end;
2409
2410 avio_skip(s->pb, klv.length - 12);
2411 mxf->footer_partition = avio_rb64(s->pb);
2412
2413 /* sanity check */
2414 if (mxf->run_in + mxf->footer_partition >= file_size) {
2415 av_log(s, AV_LOG_WARNING, "bad FooterPartition in RIP - ignoring\n");
2416 mxf->footer_partition = 0;
2417 }
2418
2419end:
2420 avio_seek(s->pb, mxf->run_in, SEEK_SET);
2421}
2422
2423static int mxf_read_header(AVFormatContext *s)
2424{
2425 MXFContext *mxf = s->priv_data;
2426 KLVPacket klv;
2427 int64_t essence_offset = 0;
2428 int ret;
2429
2430 mxf->last_forward_tell = INT64_MAX;
2431 mxf->edit_units_per_packet = 1;
2432
2433 if (!mxf_read_sync(s->pb, mxf_header_partition_pack_key, 14)) {
2434 av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2435 return AVERROR_INVALIDDATA;
2436 }
2437 avio_seek(s->pb, -14, SEEK_CUR);
2438 mxf->fc = s;
2439 mxf->run_in = avio_tell(s->pb);
2440
2441 mxf_read_random_index_pack(s);
2442
2443 while (!avio_feof(s->pb)) {
2444 const MXFMetadataReadTableEntry *metadata;
2445
2446 if (klv_read_packet(&klv, s->pb) < 0) {
2447 /* EOF - seek to previous partition or stop */
2448 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2449 break;
2450 else
2451 continue;
2452 }
2453
2454 PRINT_KEY(s, "read header", klv.key);
2455 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2456 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
2457 IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2458 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key) ||
2459 IS_KLV_KEY(klv.key, mxf_system_item_key)) {
2460
2461 if (!mxf->current_partition) {
2462 av_log(mxf->fc, AV_LOG_ERROR, "found essence prior to first PartitionPack\n");
2463 return AVERROR_INVALIDDATA;
2464 }
2465
2466 if (!mxf->current_partition->essence_offset) {
2467 /* for OP1a we compute essence_offset
2468 * for OPAtom we point essence_offset after the KL (usually op1a_essence_offset + 20 or 25)
2469 * TODO: for OP1a we could eliminate this entire if statement, always stopping parsing at op1a_essence_offset
2470 * for OPAtom we still need the actual essence_offset though (the KL's length can vary)
2471 */
2472 int64_t op1a_essence_offset =
2473 round_to_kag(mxf->current_partition->this_partition +
2474 mxf->current_partition->pack_length, mxf->current_partition->kag_size) +
2475 round_to_kag(mxf->current_partition->header_byte_count, mxf->current_partition->kag_size) +
2476 round_to_kag(mxf->current_partition->index_byte_count, mxf->current_partition->kag_size);
2477
2478 if (mxf->op == OPAtom) {
2479 /* point essence_offset to the actual data
2480 * OPAtom has all the essence in one big KLV
2481 */
2482 mxf->current_partition->essence_offset = avio_tell(s->pb);
2483 mxf->current_partition->essence_length = klv.length;
2484 } else {
2485 /* NOTE: op1a_essence_offset may be less than to klv.offset (C0023S01.mxf) */
2486 mxf->current_partition->essence_offset = op1a_essence_offset;
2487 }
2488 }
2489
2490 if (!essence_offset)
2491 essence_offset = klv.offset;
2492
2493 /* seek to footer, previous partition or stop */
2494 if (mxf_parse_handle_essence(mxf) <= 0)
2495 break;
2496 continue;
2497 } else if (mxf_is_partition_pack_key(klv.key) && mxf->current_partition) {
2498 /* next partition pack - keep going, seek to previous partition or stop */
2499 if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2500 break;
2501 else if (mxf->parsing_backward)
2502 continue;
2503 /* we're still parsing forward. proceed to parsing this partition pack */
2504 }
2505
2506 for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2507 if (IS_KLV_KEY(klv.key, metadata->key)) {
2508 if ((ret = mxf_parse_klv(mxf, klv, metadata->read, metadata->ctx_size, metadata->type)) < 0)
2509 goto fail;
2510 break;
2511 } else {
2512 av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2513 UID_ARG(klv.key));
2514 }
2515 }
2516 if (!metadata->read)
2517 avio_skip(s->pb, klv.length);
2518 }
2519 /* FIXME avoid seek */
2520 if (!essence_offset) {
2521 av_log(s, AV_LOG_ERROR, "no essence\n");
2522 return AVERROR_INVALIDDATA;
2523 }
2524 avio_seek(s->pb, essence_offset, SEEK_SET);
2525
2526 mxf_compute_essence_containers(mxf);
2527
2528 /* we need to do this before computing the index tables
2529 * to be able to fill in zero IndexDurations with st->duration */
2530 if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2531 goto fail;
2532
2533 if ((ret = mxf_compute_index_tables(mxf)) < 0)
2534 goto fail;
2535
2536 if (mxf->nb_index_tables > 1) {
2537 /* TODO: look up which IndexSID to use via EssenceContainerData */
2538 av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2539 mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2540 } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2541 av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2542 ret = AVERROR_INVALIDDATA;
2543 goto fail;
2544 }
2545
2546 mxf_handle_small_eubc(s);
2547
2548 return 0;
2549fail:
2550 mxf_read_close(s);
2551
2552 return ret;
2553}
2554
2555/**
2556 * Sets mxf->current_edit_unit based on what offset we're currently at.
2557 * @return next_ofs if OK, <0 on error
2558 */
2559static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2560{
2561 int64_t last_ofs = -1, next_ofs = -1;
2562 MXFIndexTable *t = &mxf->index_tables[0];
2563
2564 /* this is called from the OP1a demuxing logic, which means there
2565 * may be no index tables */
2566 if (mxf->nb_index_tables <= 0)
2567 return -1;
2568
2569 /* find mxf->current_edit_unit so that the next edit unit starts ahead of current_offset */
2570 while (mxf->current_edit_unit >= 0) {
2571 if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1, NULL, &next_ofs, 0) < 0)
2572 return -1;
2573
2574 if (next_ofs <= last_ofs) {
2575 /* large next_ofs didn't change or current_edit_unit wrapped
2576 * around this fixes the infinite loop on zzuf3.mxf */
2577 av_log(mxf->fc, AV_LOG_ERROR,
2578 "next_ofs didn't change. not deriving packet timestamps\n");
2579 return -1;
2580 }
2581
2582 if (next_ofs > current_offset)
2583 break;
2584
2585 last_ofs = next_ofs;
2586 mxf->current_edit_unit++;
2587 }
2588
2589 /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files may lack IndexEntryArrays */
2590 if (mxf->current_edit_unit < 0)
2591 return -1;
2592
2593 return next_ofs;
2594}
2595
2596static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2597 uint64_t *sample_count)
2598{
2599 int i, total = 0, size = 0;
2600 AVStream *st = mxf->fc->streams[stream_index];
2601 MXFTrack *track = st->priv_data;
2602 AVRational time_base = av_inv_q(track->edit_rate);
2603 AVRational sample_rate = av_inv_q(st->time_base);
2604 const MXFSamplesPerFrame *spf = NULL;
2605
2606 if ((sample_rate.num / sample_rate.den) == 48000)
2607 spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2608 if (!spf) {
2609 int remainder = (sample_rate.num * time_base.num) %
2610 (time_base.den * sample_rate.den);
2611 *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2612 av_mul_q(sample_rate, time_base)));
2613 if (remainder)
2614 av_log(mxf->fc, AV_LOG_WARNING,
2615 "seeking detected on stream #%d with time base (%d/%d) and "
2616 "sample rate (%d/%d), audio pts won't be accurate.\n",
2617 stream_index, time_base.num, time_base.den,
2618 sample_rate.num, sample_rate.den);
2619 return 0;
2620 }
2621
2622 while (spf->samples_per_frame[size]) {
2623 total += spf->samples_per_frame[size];
2624 size++;
2625 }
2626
2627 av_assert2(size);
2628
2629 *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2630 for (i = 0; i < mxf->current_edit_unit % size; i++) {
2631 *sample_count += spf->samples_per_frame[i];
2632 }
2633
2634 return 0;
2635}
2636
2637static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec,
2638 AVPacket *pkt)
2639{
2640 MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2641 int64_t bits_per_sample = codec->bits_per_coded_sample;
2642
2643 if (!bits_per_sample)
2644 bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2645
2646 pkt->pts = track->sample_count;
2647
2648 if ( codec->channels <= 0
2649 || bits_per_sample <= 0
2650 || codec->channels * (int64_t)bits_per_sample < 8)
2651 return AVERROR(EINVAL);
2652 track->sample_count += pkt->size / (codec->channels * (int64_t)bits_per_sample / 8);
2653 return 0;
2654}
2655
2656static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
2657{
2658 KLVPacket klv;
2659 MXFContext *mxf = s->priv_data;
2660 int ret;
2661
2662 while ((ret = klv_read_packet(&klv, s->pb)) == 0) {
2663 PRINT_KEY(s, "read packet", klv.key);
2664 av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2665 if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
2666 ret = mxf_decrypt_triplet(s, pkt, &klv);
2667 if (ret < 0) {
2668 av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2669 return ret;
2670 }
2671 return 0;
2672 }
2673 if (IS_KLV_KEY(klv.key, mxf_essence_element_key) ||
2674 IS_KLV_KEY(klv.key, mxf_avid_essence_element_key)) {
2675 int index = mxf_get_stream_index(s, &klv);
2676 int64_t next_ofs, next_klv;
2677 AVStream *st;
2678 MXFTrack *track;
2679 AVCodecContext *codec;
2680
2681 if (index < 0) {
2682 av_log(s, AV_LOG_ERROR,
2683 "error getting stream index %"PRIu32"\n",
2684 AV_RB32(klv.key + 12));
2685 goto skip;
2686 }
2687
2688 st = s->streams[index];
2689 track = st->priv_data;
2690
2691 if (s->streams[index]->discard == AVDISCARD_ALL)
2692 goto skip;
2693
2694 next_klv = avio_tell(s->pb) + klv.length;
2695 next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2696
2697 if (next_ofs >= 0 && next_klv > next_ofs) {
2698 /* if this check is hit then it's possible OPAtom was treated as OP1a
2699 * truncate the packet since it's probably very large (>2 GiB is common) */
2700 avpriv_request_sample(s,
2701 "OPAtom misinterpreted as OP1a?"
2702 "KLV for edit unit %i extending into "
2703 "next edit unit",
2704 mxf->current_edit_unit);
2705 klv.length = next_ofs - avio_tell(s->pb);
2706 }
2707
2708 /* check for 8 channels AES3 element */
2709 if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2710 ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2711 pkt, klv.length);
2712 if (ret < 0) {
2713 av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2714 return ret;
2715 }
2716 } else {
2717 ret = av_get_packet(s->pb, pkt, klv.length);
2718 if (ret < 0)
2719 return ret;
2720 }
2721 pkt->stream_index = index;
2722 pkt->pos = klv.offset;
2723
2724 codec = st->codec;
2725
2726 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2727 /* mxf->current_edit_unit good - see if we have an
2728 * index table to derive timestamps from */
2729 MXFIndexTable *t = &mxf->index_tables[0];
2730
2731 if (mxf->nb_index_tables >= 1 && mxf->current_edit_unit < t->nb_ptses) {
2732 pkt->dts = mxf->current_edit_unit + t->first_dts;
2733 pkt->pts = t->ptses[mxf->current_edit_unit];
2734 } else if (track->intra_only) {
2735 /* intra-only -> PTS = EditUnit.
2736 * let utils.c figure out DTS since it can be < PTS if low_delay = 0 (Sony IMX30) */
2737 pkt->pts = mxf->current_edit_unit;
2738 }
2739 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2740 ret = mxf_set_audio_pts(mxf, codec, pkt);
2741 if (ret < 0)
2742 return ret;
2743 }
2744
2745 /* seek for truncated packets */
2746 avio_seek(s->pb, next_klv, SEEK_SET);
2747
2748 return 0;
2749 } else
2750 skip:
2751 avio_skip(s->pb, klv.length);
2752 }
2753 return avio_feof(s->pb) ? AVERROR_EOF : ret;
2754}
2755
2756static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
2757{
2758 MXFContext *mxf = s->priv_data;
2759 int ret, size;
2760 int64_t ret64, pos, next_pos;
2761 AVStream *st;
2762 MXFIndexTable *t;
2763 int edit_units;
2764
2765 if (mxf->op != OPAtom)
2766 return mxf_read_packet_old(s, pkt);
2767
2768 /* OPAtom - clip wrapped demuxing */
2769 /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2770 st = s->streams[0];
2771 t = &mxf->index_tables[0];
2772
2773 if (mxf->current_edit_unit >= st->duration)
2774 return AVERROR_EOF;
2775
2776 edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2777
2778 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2779 return ret;
2780
2781 /* compute size by finding the next edit unit or the end of the essence container
2782 * not pretty, but it works */
2783 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2784 (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2785 av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2786 return AVERROR_INVALIDDATA;
2787 }
2788
2789 if ((size = next_pos - pos) <= 0) {
2790 av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2791 return AVERROR_INVALIDDATA;
2792 }
2793
2794 if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2795 return ret64;
2796
2797 if ((size = av_get_packet(s->pb, pkt, size)) < 0)
2798 return size;
2799
2800 pkt->stream_index = 0;
2801
2802 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2803 mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2804 pkt->dts = mxf->current_edit_unit + t->first_dts;
2805 pkt->pts = t->ptses[mxf->current_edit_unit];
2806 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2807 int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2808 if (ret < 0)
2809 return ret;
2810 }
2811
2812 mxf->current_edit_unit += edit_units;
2813
2814 return 0;
2815}
2816
2817static int mxf_read_close(AVFormatContext *s)
2818{
2819 MXFContext *mxf = s->priv_data;
2820 MXFIndexTableSegment *seg;
2821 int i;
2822
2823 av_freep(&mxf->packages_refs);
2824
2825 for (i = 0; i < s->nb_streams; i++)
2826 s->streams[i]->priv_data = NULL;
2827
2828 for (i = 0; i < mxf->metadata_sets_count; i++) {
2829 switch (mxf->metadata_sets[i]->type) {
2830 case Descriptor:
2831 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2832 break;
2833 case MultipleDescriptor:
2834 av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2835 break;
2836 case Sequence:
2837 av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2838 break;
2839 case EssenceGroup:
2840 av_freep(&((MXFEssenceGroup *)mxf->metadata_sets[i])->structural_components_refs);
2841 break;
2842 case SourcePackage:
2843 case MaterialPackage:
2844 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2845 av_freep(&((MXFPackage *)mxf->metadata_sets[i])->name);
2846 break;
2847 case IndexTableSegment:
2848 seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2849 av_freep(&seg->temporal_offset_entries);
2850 av_freep(&seg->flag_entries);
2851 av_freep(&seg->stream_offset_entries);
2852 break;
2853 default:
2854 break;
2855 }
2856 av_freep(&mxf->metadata_sets[i]);
2857 }
2858 av_freep(&mxf->partitions);
2859 av_freep(&mxf->metadata_sets);
2860 av_freep(&mxf->aesc);
2861 av_freep(&mxf->local_tags);
2862
2863 if (mxf->index_tables) {
2864 for (i = 0; i < mxf->nb_index_tables; i++) {
2865 av_freep(&mxf->index_tables[i].segments);
2866 av_freep(&mxf->index_tables[i].ptses);
2867 av_freep(&mxf->index_tables[i].fake_index);
2868 }
2869 }
2870 av_freep(&mxf->index_tables);
2871
2872 return 0;
2873}
2874
2875static int mxf_probe(AVProbeData *p) {
2876 const uint8_t *bufp = p->buf;
2877 const uint8_t *end = p->buf + p->buf_size;
2878
2879 if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2880 return 0;
2881
2882 /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2883 end -= sizeof(mxf_header_partition_pack_key);
2884
2885 for (; bufp < end;) {
2886 if (!((bufp[13] - 1) & 0xF2)){
2887 if (AV_RN32(bufp ) == AV_RN32(mxf_header_partition_pack_key ) &&
2888 AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
2889 AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
2890 AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
2891 return AVPROBE_SCORE_MAX;
2892 bufp ++;
2893 } else
2894 bufp += 10;
2895 }
2896
2897 return 0;
2898}
2899
2900/* rudimentary byte seek */
2901/* XXX: use MXF Index */
2902static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2903{
2904 AVStream *st = s->streams[stream_index];
2905 int64_t seconds;
2906 MXFContext* mxf = s->priv_data;
2907 int64_t seekpos;
2908 int i, ret;
2909 MXFIndexTable *t;
2910 MXFTrack *source_track = st->priv_data;
2911
2912 /* if audio then truncate sample_time to EditRate */
2913 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2914 sample_time = av_rescale_q(sample_time, st->time_base,
2915 av_inv_q(source_track->edit_rate));
2916
2917 if (mxf->nb_index_tables <= 0) {
2918 if (!s->bit_rate)
2919 return AVERROR_INVALIDDATA;
2920 if (sample_time < 0)
2921 sample_time = 0;
2922 seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2923
2924 seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2925 if (seekpos < 0)
2926 return seekpos;
2927
2928 ff_update_cur_dts(s, st, sample_time);
2929 mxf->current_edit_unit = sample_time;
2930 } else {
2931 t = &mxf->index_tables[0];
2932
2933 /* clamp above zero, else ff_index_search_timestamp() returns negative
2934 * this also means we allow seeking before the start */
2935 sample_time = FFMAX(sample_time, 0);
2936
2937 if (t->fake_index) {
2938 /* behave as if we have a proper index */
2939 if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2940 return sample_time;
2941 } else {
2942 /* no IndexEntryArray (one or more CBR segments)
2943 * make sure we don't seek past the end */
2944 sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2945 }
2946
2947 if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) < 0)
2948 return ret;
2949
2950 ff_update_cur_dts(s, st, sample_time);
2951 mxf->current_edit_unit = sample_time;
2952 avio_seek(s->pb, seekpos, SEEK_SET);
2953 }
2954
2955 // Update all tracks sample count
2956 for (i = 0; i < s->nb_streams; i++) {
2957 AVStream *cur_st = s->streams[i];
2958 MXFTrack *cur_track = cur_st->priv_data;
2959 uint64_t current_sample_count = 0;
2960 if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2961 ret = mxf_compute_sample_count(mxf, i, &current_sample_count);
2962 if (ret < 0)
2963 return ret;
2964
2965 cur_track->sample_count = current_sample_count;
2966 }
2967 }
2968 return 0;
2969}
2970
2971AVInputFormat ff_mxf_demuxer = {
2972 .name = "mxf",
2973 .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2974 .priv_data_size = sizeof(MXFContext),
2975 .read_probe = mxf_probe,
2976 .read_header = mxf_read_header,
2977 .read_packet = mxf_read_packet,
2978 .read_close = mxf_read_close,
2979 .read_seek = mxf_read_seek,
2980};
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