Libav
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 Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /*
23  * References
24  * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25  * SMPTE 377M MXF File Format Specifications
26  * SMPTE 378M Operational Pattern 1a
27  * SMPTE 379M MXF Generic Container
28  * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29  * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30  * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
31  *
32  * Principle
33  * Search for Track numbers which will identify essence element KLV packets.
34  * Search for SourcePackage which define tracks which contains Track numbers.
35  * Material Package contains tracks with reference to SourcePackage tracks.
36  * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
37  * Assign Descriptors to correct Tracks.
38  *
39  * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40  * Metadata parsing resolves Strong References to objects.
41  *
42  * Simple demuxer, only OP1A supported and some files might not work at all.
43  * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
44  */
45 
46 #include <inttypes.h>
47 
48 #include "libavutil/aes.h"
49 #include "libavutil/mathematics.h"
50 #include "libavcodec/bytestream.h"
51 #include "avformat.h"
52 #include "internal.h"
53 #include "mxf.h"
54 
55 typedef enum {
60 
61 typedef enum {
62  OP1a = 1,
72  OPSonyOpt, /* FATE sample, violates the spec in places */
73 } MXFOP;
74 
75 typedef struct {
76  int closed;
77  int complete;
80  int index_sid;
81  int body_sid;
82  int64_t this_partition;
83  int64_t essence_offset;
84  int64_t essence_length;
89 } MXFPartition;
90 
91 typedef struct {
93  enum MXFMetadataSetType type;
96 
97 typedef struct {
99  enum MXFMetadataSetType type;
102  int64_t duration;
103  int64_t start_position;
106 
107 typedef struct {
113  int64_t duration;
115 } MXFSequence;
116 
117 typedef struct {
120  MXFSequence *sequence; /* mandatory, and only one */
122  int track_id;
123  uint8_t track_number[4];
126  uint64_t sample_count;
127  int64_t original_duration; /* st->duration in SampleRate/EditRate units */
128 } MXFTrack;
129 
130 typedef struct {
137  int width;
138  int height; /* Field height, not frame height */
139  int frame_layout; /* See MXFFrameLayout enum */
140 #define MXF_TFF 1
141 #define MXF_BFF 2
143  int channels;
145  unsigned int component_depth;
146  unsigned int horiz_subsampling;
147  unsigned int vert_subsampling;
154 } MXFDescriptor;
155 
156 typedef struct {
161  int body_sid;
164  uint64_t index_duration;
170 
171 typedef struct {
177  MXFDescriptor *descriptor; /* only one */
179 } MXFPackage;
180 
181 typedef struct {
185 
186 /* decoded index table */
187 typedef struct {
189  int body_sid;
190  int nb_ptses; /* number of PTSes or total duration of index */
191  int64_t first_dts; /* DTS = EditUnit + first_dts */
192  int64_t *ptses; /* maps EditUnit -> PTS */
194  MXFIndexTableSegment **segments; /* sorted by IndexStartPosition */
195  AVIndexEntry *fake_index; /* used for calling ff_index_search_timestamp() */
196 } MXFIndexTable;
197 
198 typedef struct {
207  struct AVAES *aesc;
210  uint64_t last_partition;
214  int run_in;
223 } MXFContext;
224 
228 };
229 
230 /* NOTE: klv_offset is not set (-1) for local keys */
231 typedef int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset);
232 
233 typedef struct {
234  const UID key;
236  int ctx_size;
239 
240 /* partial keys to match */
241 static const uint8_t mxf_header_partition_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
242 static const uint8_t mxf_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
243 static const uint8_t mxf_avid_essence_element_key[] = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0e,0x04,0x03,0x01 };
244 static const uint8_t mxf_system_item_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x03,0x01,0x04 };
245 static const uint8_t mxf_klv_key[] = { 0x06,0x0e,0x2b,0x34 };
246 /* complete keys to match */
247 static const uint8_t mxf_crypto_source_container_ul[] = { 0x06,0x0e,0x2b,0x34,0x01,0x01,0x01,0x09,0x06,0x01,0x01,0x02,0x02,0x00,0x00,0x00 };
248 static const uint8_t mxf_encrypted_triplet_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
249 static const uint8_t mxf_encrypted_essence_container[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
250 static const uint8_t mxf_random_index_pack_key[] = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x11,0x01,0x00 };
251 static const uint8_t mxf_sony_mpeg4_extradata[] = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0e,0x06,0x06,0x02,0x02,0x01,0x00,0x00 };
252 
253 #define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
254 
256 {
257  uint64_t size = avio_r8(pb);
258  if (size & 0x80) { /* long form */
259  int bytes_num = size & 0x7f;
260  /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
261  if (bytes_num > 8)
262  return AVERROR_INVALIDDATA;
263  size = 0;
264  while (bytes_num--)
265  size = size << 8 | avio_r8(pb);
266  }
267  return size;
268 }
269 
270 static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
271 {
272  int i, b;
273  for (i = 0; i < size && !pb->eof_reached; i++) {
274  b = avio_r8(pb);
275  if (b == key[0])
276  i = 0;
277  else if (b != key[i])
278  i = -1;
279  }
280  return i == size;
281 }
282 
283 static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
284 {
285  if (!mxf_read_sync(pb, mxf_klv_key, 4))
286  return AVERROR_INVALIDDATA;
287  klv->offset = avio_tell(pb) - 4;
288  memcpy(klv->key, mxf_klv_key, 4);
289  avio_read(pb, klv->key + 4, 12);
290  klv->length = klv_decode_ber_length(pb);
291  return klv->length == -1 ? -1 : 0;
292 }
293 
295 {
296  int i;
297 
298  for (i = 0; i < s->nb_streams; i++) {
299  MXFTrack *track = s->streams[i]->priv_data;
300  /* SMPTE 379M 7.3 */
301  if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
302  return i;
303  }
304  /* return 0 if only one stream, for OP Atom files with 0 as track number */
305  return s->nb_streams == 1 ? 0 : -1;
306 }
307 
308 /* XXX: use AVBitStreamFilter */
309 static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
310 {
311  const uint8_t *buf_ptr, *end_ptr;
312  uint8_t *data_ptr;
313  int i;
314 
315  if (length > 61444) /* worst case PAL 1920 samples 8 channels */
316  return AVERROR_INVALIDDATA;
317  length = av_get_packet(pb, pkt, length);
318  if (length < 0)
319  return length;
320  data_ptr = pkt->data;
321  end_ptr = pkt->data + length;
322  buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */
323  for (; end_ptr - buf_ptr >= st->codec->channels * 4; ) {
324  for (i = 0; i < st->codec->channels; i++) {
325  uint32_t sample = bytestream_get_le32(&buf_ptr);
326  if (st->codec->bits_per_coded_sample == 24)
327  bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff);
328  else
329  bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff);
330  }
331  buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M
332  }
333  av_shrink_packet(pkt, data_ptr - pkt->data);
334  return 0;
335 }
336 
338 {
339  static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
340  MXFContext *mxf = s->priv_data;
341  AVIOContext *pb = s->pb;
342  int64_t end = avio_tell(pb) + klv->length;
343  int64_t size;
344  uint64_t orig_size;
345  uint64_t plaintext_size;
346  uint8_t ivec[16];
347  uint8_t tmpbuf[16];
348  int index;
349 
350  if (!mxf->aesc && s->key && s->keylen == 16) {
351  mxf->aesc = av_aes_alloc();
352  if (!mxf->aesc)
353  return AVERROR(ENOMEM);
354  av_aes_init(mxf->aesc, s->key, 128, 1);
355  }
356  // crypto context
358  // plaintext offset
360  plaintext_size = avio_rb64(pb);
361  // source klv key
363  avio_read(pb, klv->key, 16);
365  return AVERROR_INVALIDDATA;
366  index = mxf_get_stream_index(s, klv);
367  if (index < 0)
368  return AVERROR_INVALIDDATA;
369  // source size
371  orig_size = avio_rb64(pb);
372  if (orig_size < plaintext_size)
373  return AVERROR_INVALIDDATA;
374  // enc. code
375  size = klv_decode_ber_length(pb);
376  if (size < 32 || size - 32 < orig_size)
377  return AVERROR_INVALIDDATA;
378  avio_read(pb, ivec, 16);
379  avio_read(pb, tmpbuf, 16);
380  if (mxf->aesc)
381  av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
382  if (memcmp(tmpbuf, checkv, 16))
383  av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
384  size -= 32;
385  size = av_get_packet(pb, pkt, size);
386  if (size < 0)
387  return size;
388  else if (size < plaintext_size)
389  return AVERROR_INVALIDDATA;
390  size -= plaintext_size;
391  if (mxf->aesc)
392  av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
393  &pkt->data[plaintext_size], size >> 4, ivec, 1);
394  av_shrink_packet(pkt, orig_size);
395  pkt->stream_index = index;
396  avio_skip(pb, end - avio_tell(pb));
397  return 0;
398 }
399 
400 static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
401 {
402  MXFContext *mxf = arg;
403  int item_num = avio_rb32(pb);
404  int item_len = avio_rb32(pb);
405 
406  if (item_len != 18) {
407  avpriv_request_sample(pb, "Primer pack item length %d", item_len);
408  return AVERROR_PATCHWELCOME;
409  }
410  if (item_num > 65536 || item_num < 0)
411  av_log(mxf->fc, AV_LOG_ERROR, "item_num %d is too large\n", item_num);
412  return AVERROR_INVALIDDATA;
413  mxf->local_tags = av_malloc(item_num*item_len);
414  if (!mxf->local_tags)
415  return AVERROR(ENOMEM);
416  mxf->local_tags_count = item_num;
417  avio_read(pb, mxf->local_tags, item_num*item_len);
418  return 0;
419 }
420 
421 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
422 {
423  MXFContext *mxf = arg;
424  MXFPartition *partition;
425  UID op;
426  uint64_t footer_partition;
427  uint32_t nb_essence_containers;
428  int err;
429 
430  if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
431  sizeof(*mxf->partitions))) < 0) {
432  mxf->partitions_count = 0;
433  return err;
434  }
435 
436  if (mxf->parsing_backward) {
437  /* insert the new partition pack in the middle
438  * this makes the entries in mxf->partitions sorted by offset */
439  memmove(&mxf->partitions[mxf->last_forward_partition+1],
441  (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
442  partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
443  } else {
444  mxf->last_forward_partition++;
445  partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
446  }
447 
448  memset(partition, 0, sizeof(*partition));
449  mxf->partitions_count++;
450  partition->pack_length = avio_tell(pb) - klv_offset + size;
451 
452  switch(uid[13]) {
453  case 2:
454  partition->type = Header;
455  break;
456  case 3:
457  partition->type = BodyPartition;
458  break;
459  case 4:
460  partition->type = Footer;
461  break;
462  default:
463  av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
464  return AVERROR_INVALIDDATA;
465  }
466 
467  /* consider both footers to be closed (there is only Footer and CompleteFooter) */
468  partition->closed = partition->type == Footer || !(uid[14] & 1);
469  partition->complete = uid[14] > 2;
470  avio_skip(pb, 4);
471  partition->kag_size = avio_rb32(pb);
472  partition->this_partition = avio_rb64(pb);
473  partition->previous_partition = avio_rb64(pb);
474  footer_partition = avio_rb64(pb);
475  partition->header_byte_count = avio_rb64(pb);
476  partition->index_byte_count = avio_rb64(pb);
477  partition->index_sid = avio_rb32(pb);
478  avio_skip(pb, 8);
479  partition->body_sid = avio_rb32(pb);
480  avio_read(pb, op, sizeof(UID));
481  nb_essence_containers = avio_rb32(pb);
482 
483  if (partition->this_partition &&
484  partition->previous_partition == partition->this_partition) {
485  av_log(mxf->fc, AV_LOG_ERROR,
486  "PreviousPartition equal to ThisPartition %"PRIx64"\n",
487  partition->previous_partition);
488  /* override with the actual previous partition offset */
489  if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
490  MXFPartition *prev =
491  mxf->partitions + mxf->last_forward_partition - 2;
492  partition->previous_partition = prev->this_partition;
493  }
494  /* if no previous body partition are found point to the header
495  * partition */
496  if (partition->previous_partition == partition->this_partition)
497  partition->previous_partition = 0;
498  av_log(mxf->fc, AV_LOG_ERROR,
499  "Overriding PreviousPartition with %"PRIx64"\n",
500  partition->previous_partition);
501  }
502 
503  /* some files don'thave FooterPartition set in every partition */
504  if (footer_partition) {
505  if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
506  av_log(mxf->fc, AV_LOG_ERROR,
507  "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
508  mxf->footer_partition, footer_partition);
509  } else {
510  mxf->footer_partition = footer_partition;
511  }
512  }
513 
514  av_dlog(mxf->fc,
515  "PartitionPack: ThisPartition = 0x%"PRIX64
516  ", PreviousPartition = 0x%"PRIX64", "
517  "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
518  partition->this_partition,
519  partition->previous_partition, footer_partition,
520  partition->index_sid, partition->body_sid);
521 
522  /* sanity check PreviousPartition if set */
523  if (partition->previous_partition &&
524  mxf->run_in + partition->previous_partition >= klv_offset) {
525  av_log(mxf->fc, AV_LOG_ERROR,
526  "PreviousPartition points to this partition or forward\n");
527  return AVERROR_INVALIDDATA;
528  }
529 
530  if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
531  else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
532  else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
533  else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
534  else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
535  else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
536  else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
537  else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
538  else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
539  else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
540  else if (op[12] == 0x10) {
541  /* SMPTE 390m: "There shall be exactly one essence container"
542  * The following block deals with files that violate this, namely:
543  * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
544  * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
545  if (nb_essence_containers != 1) {
546  MXFOP op = nb_essence_containers ? OP1a : OPAtom;
547 
548  /* only nag once */
549  if (!mxf->op)
550  av_log(mxf->fc, AV_LOG_WARNING,
551  "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
552  nb_essence_containers,
553  op == OP1a ? "OP1a" : "OPAtom");
554 
555  mxf->op = op;
556  } else
557  mxf->op = OPAtom;
558  } else {
559  av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
560  mxf->op = OP1a;
561  }
562 
563  if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
564  av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
565  partition->kag_size);
566 
567  if (mxf->op == OPSonyOpt)
568  partition->kag_size = 512;
569  else
570  partition->kag_size = 1;
571 
572  av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
573  }
574 
575  return 0;
576 }
577 
578 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
579 {
580  int err;
581 
582  if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
583  sizeof(*mxf->metadata_sets))) < 0) {
584  mxf->metadata_sets_count = 0;
585  return err;
586  }
587  mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
588  mxf->metadata_sets_count++;
589  return 0;
590 }
591 
592 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
593 {
594  MXFCryptoContext *cryptocontext = arg;
595  if (size != 16)
596  return AVERROR_INVALIDDATA;
598  avio_read(pb, cryptocontext->source_container_ul, 16);
599  return 0;
600 }
601 
602 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
603 {
604  MXFContext *mxf = arg;
605  switch (tag) {
606  case 0x1901:
607  mxf->packages_count = avio_rb32(pb);
608  if (mxf->packages_count >= UINT_MAX / sizeof(UID))
609  return AVERROR_INVALIDDATA;
610  mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
611  if (!mxf->packages_refs)
612  return AVERROR(ENOMEM);
613  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
614  avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
615  break;
616  }
617  return 0;
618 }
619 
620 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
621 {
622  MXFStructuralComponent *source_clip = arg;
623  switch(tag) {
624  case 0x0202:
625  source_clip->duration = avio_rb64(pb);
626  break;
627  case 0x1201:
628  source_clip->start_position = avio_rb64(pb);
629  break;
630  case 0x1101:
631  /* UMID, only get last 16 bytes */
632  avio_skip(pb, 16);
633  avio_read(pb, source_clip->source_package_uid, 16);
634  break;
635  case 0x1102:
636  source_clip->source_track_id = avio_rb32(pb);
637  break;
638  }
639  return 0;
640 }
641 
642 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
643 {
644  MXFPackage *package = arg;
645  switch(tag) {
646  case 0x4403:
647  package->tracks_count = avio_rb32(pb);
648  if (package->tracks_count >= UINT_MAX / sizeof(UID))
649  return AVERROR_INVALIDDATA;
650  package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
651  if (!package->tracks_refs)
652  return AVERROR(ENOMEM);
653  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
654  avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
655  break;
656  }
657  return 0;
658 }
659 
660 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
661 {
662  MXFTrack *track = arg;
663  switch(tag) {
664  case 0x4801:
665  track->track_id = avio_rb32(pb);
666  break;
667  case 0x4804:
668  avio_read(pb, track->track_number, 4);
669  break;
670  case 0x4b01:
671  track->edit_rate.num = avio_rb32(pb);
672  track->edit_rate.den = avio_rb32(pb);
673  break;
674  case 0x4803:
675  avio_read(pb, track->sequence_ref, 16);
676  break;
677  }
678  return 0;
679 }
680 
681 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
682 {
683  MXFSequence *sequence = arg;
684  switch(tag) {
685  case 0x0202:
686  sequence->duration = avio_rb64(pb);
687  break;
688  case 0x0201:
689  avio_read(pb, sequence->data_definition_ul, 16);
690  break;
691  case 0x4b02:
692  sequence->origin = avio_r8(pb);
693  break;
694  case 0x1001:
695  sequence->structural_components_count = avio_rb32(pb);
696  if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
697  return AVERROR_INVALIDDATA;
698  sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
699  if (!sequence->structural_components_refs)
700  return AVERROR(ENOMEM);
701  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
702  avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
703  break;
704  }
705  return 0;
706 }
707 
708 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
709 {
710  MXFPackage *package = arg;
711  switch(tag) {
712  case 0x4403:
713  package->tracks_count = avio_rb32(pb);
714  if (package->tracks_count >= UINT_MAX / sizeof(UID))
715  return AVERROR_INVALIDDATA;
716  package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
717  if (!package->tracks_refs)
718  return AVERROR(ENOMEM);
719  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
720  avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
721  break;
722  case 0x4401:
723  /* UMID, only get last 16 bytes */
724  avio_skip(pb, 16);
725  avio_read(pb, package->package_uid, 16);
726  break;
727  case 0x4701:
728  avio_read(pb, package->descriptor_ref, 16);
729  break;
730  }
731  return 0;
732 }
733 
735 {
736  int i, length;
737 
738  segment->nb_index_entries = avio_rb32(pb);
739  if (!segment->nb_index_entries)
740  return 0;
741  else if (segment->nb_index_entries < 0 ||
742  segment->nb_index_entries >
743  (INT_MAX / sizeof(*segment->stream_offset_entries)))
744  return AVERROR(ENOMEM);
745 
746  length = avio_rb32(pb);
747  if(segment->nb_index_entries && length < 11)
748  return AVERROR_INVALIDDATA;
749 
751  sizeof(*segment->temporal_offset_entries));
752  segment->flag_entries = av_mallocz(segment->nb_index_entries *
753  sizeof(*segment->flag_entries));
755  sizeof(*segment->stream_offset_entries));
756 
757  if (!segment->flag_entries || !segment->stream_offset_entries ||
758  !segment->temporal_offset_entries) {
759  av_freep(&segment->flag_entries);
760  av_freep(&segment->stream_offset_entries);
762  return AVERROR(ENOMEM);
763  }
764 
765  for (i = 0; i < segment->nb_index_entries; i++) {
766  if(avio_feof(pb))
767  return AVERROR_INVALIDDATA;
768  segment->temporal_offset_entries[i] = avio_r8(pb);
769  avio_r8(pb); /* KeyFrameOffset */
770  segment->flag_entries[i] = avio_r8(pb);
771  segment->stream_offset_entries[i] = avio_rb64(pb);
772  avio_skip(pb, length - 11);
773  }
774  return 0;
775 }
776 
777 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
778 {
780  switch(tag) {
781  case 0x3F05:
782  segment->edit_unit_byte_count = avio_rb32(pb);
783  av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
784  break;
785  case 0x3F06:
786  segment->index_sid = avio_rb32(pb);
787  av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
788  break;
789  case 0x3F07:
790  segment->body_sid = avio_rb32(pb);
791  av_dlog(NULL, "BodySID %d\n", segment->body_sid);
792  break;
793  case 0x3F0A:
794  av_dlog(NULL, "IndexEntryArray found\n");
795  return mxf_read_index_entry_array(pb, segment);
796  case 0x3F0B:
797  segment->index_edit_rate.num = avio_rb32(pb);
798  segment->index_edit_rate.den = avio_rb32(pb);
799  av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
800  segment->index_edit_rate.den);
801  break;
802  case 0x3F0C:
803  segment->index_start_position = avio_rb64(pb);
804  av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
805  break;
806  case 0x3F0D:
807  segment->index_duration = avio_rb64(pb);
808  av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
809  break;
810  }
811  return 0;
812 }
813 
814 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
815 {
816  int code, value, ofs = 0;
817  char layout[16] = {0};
818 
819  do {
820  code = avio_r8(pb);
821  value = avio_r8(pb);
822  av_dlog(NULL, "pixel layout: code %#x\n", code);
823 
824  if (ofs < 16) {
825  layout[ofs++] = code;
826  layout[ofs++] = value;
827  }
828  } while (code != 0); /* SMPTE 377M E.2.46 */
829 
830  ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
831 }
832 
833 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
834 {
835  MXFDescriptor *descriptor = arg;
836  descriptor->pix_fmt = AV_PIX_FMT_NONE;
837  switch(tag) {
838  case 0x3F01:
839  descriptor->sub_descriptors_count = avio_rb32(pb);
840  if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
841  return AVERROR_INVALIDDATA;
842  descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
843  if (!descriptor->sub_descriptors_refs)
844  return AVERROR(ENOMEM);
845  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
846  avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
847  break;
848  case 0x3004:
849  avio_read(pb, descriptor->essence_container_ul, 16);
850  break;
851  case 0x3006:
852  descriptor->linked_track_id = avio_rb32(pb);
853  break;
854  case 0x3201: /* PictureEssenceCoding */
855  avio_read(pb, descriptor->essence_codec_ul, 16);
856  break;
857  case 0x3203:
858  descriptor->width = avio_rb32(pb);
859  break;
860  case 0x3202:
861  descriptor->height = avio_rb32(pb);
862  break;
863  case 0x320C:
864  descriptor->frame_layout = avio_r8(pb);
865  break;
866  case 0x320E:
867  descriptor->aspect_ratio.num = avio_rb32(pb);
868  descriptor->aspect_ratio.den = avio_rb32(pb);
869  break;
870  case 0x3212:
871  descriptor->field_dominance = avio_r8(pb);
872  break;
873  case 0x3301:
874  descriptor->component_depth = avio_rb32(pb);
875  break;
876  case 0x3302:
877  descriptor->horiz_subsampling = avio_rb32(pb);
878  break;
879  case 0x3308:
880  descriptor->vert_subsampling = avio_rb32(pb);
881  break;
882  case 0x3D03:
883  descriptor->sample_rate.num = avio_rb32(pb);
884  descriptor->sample_rate.den = avio_rb32(pb);
885  break;
886  case 0x3D06: /* SoundEssenceCompression */
887  avio_read(pb, descriptor->essence_codec_ul, 16);
888  break;
889  case 0x3D07:
890  descriptor->channels = avio_rb32(pb);
891  break;
892  case 0x3D01:
893  descriptor->bits_per_sample = avio_rb32(pb);
894  break;
895  case 0x3401:
896  mxf_read_pixel_layout(pb, descriptor);
897  break;
898  default:
899  /* Private uid used by SONY C0023S01.mxf */
901  av_free(descriptor->extradata);
902  descriptor->extradata_size = 0;
903  descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
904  if (!descriptor->extradata)
905  return AVERROR(ENOMEM);
906  descriptor->extradata_size = size;
907  avio_read(pb, descriptor->extradata, size);
908  }
909  break;
910  }
911  return 0;
912 }
913 
914 /*
915  * Match an uid independently of the version byte and up to len common bytes
916  * Returns: boolean
917  */
918 static int mxf_match_uid(const UID key, const UID uid, int len)
919 {
920  int i;
921  for (i = 0; i < len; i++) {
922  if (i != 7 && key[i] != uid[i])
923  return 0;
924  }
925  return 1;
926 }
927 
928 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
929 {
930  while (uls->uid[0]) {
931  if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
932  break;
933  uls++;
934  }
935  return uls;
936 }
937 
938 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
939 {
940  int i;
941 
942  if (!strong_ref)
943  return NULL;
944  for (i = 0; i < mxf->metadata_sets_count; i++) {
945  if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
946  (type == AnyType || mxf->metadata_sets[i]->type == type)) {
947  return mxf->metadata_sets[i];
948  }
949  }
950  return NULL;
951 }
952 
954  // video essence container uls
955  { { 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 */
956  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
957  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
958  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
959 };
960 
961 /* EC ULs for intra-only formats */
963  { { 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 */
964  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
965 };
966 
967 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
969  { { 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 */
970  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
971  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
972 };
973 
975  // sound essence container uls
976  { { 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 */
977  { { 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 */
978  { { 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 */
979  { { 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 */
980  { { 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) */
981  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
982 };
983 
985  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
986  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, AV_CODEC_ID_NONE },
987 };
988 
989 static const char* mxf_data_essence_descriptor[] = {
990  "vbi_vanc_smpte_436M",
991 };
992 
993 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
994 {
995  int i, j, nb_segments = 0;
996  MXFIndexTableSegment **unsorted_segments;
997  int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
998 
999  /* count number of segments, allocate arrays and copy unsorted segments */
1000  for (i = 0; i < mxf->metadata_sets_count; i++)
1001  if (mxf->metadata_sets[i]->type == IndexTableSegment)
1002  nb_segments++;
1003 
1004  if (!nb_segments)
1005  return AVERROR_INVALIDDATA;
1006 
1007  *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
1008  unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
1009  if (!*sorted_segments || !unsorted_segments) {
1010  av_freep(sorted_segments);
1011  av_free(unsorted_segments);
1012  return AVERROR(ENOMEM);
1013  }
1014 
1015  for (i = j = 0; i < mxf->metadata_sets_count; i++)
1016  if (mxf->metadata_sets[i]->type == IndexTableSegment)
1017  unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1018 
1019  *nb_sorted_segments = 0;
1020 
1021  /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1022  for (i = 0; i < nb_segments; i++) {
1023  int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1024  uint64_t best_index_duration = 0;
1025 
1026  for (j = 0; j < nb_segments; j++) {
1027  MXFIndexTableSegment *s = unsorted_segments[j];
1028 
1029  /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1030  * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1031  * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1032  */
1033  if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1034  (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1035  (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1036  best = j;
1037  best_body_sid = s->body_sid;
1038  best_index_sid = s->index_sid;
1039  best_index_start = s->index_start_position;
1040  best_index_duration = s->index_duration;
1041  }
1042  }
1043 
1044  /* no suitable entry found -> we're done */
1045  if (best == -1)
1046  break;
1047 
1048  (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1049  last_body_sid = best_body_sid;
1050  last_index_sid = best_index_sid;
1051  last_index_start = best_index_start;
1052  }
1053 
1054  av_free(unsorted_segments);
1055 
1056  return 0;
1057 }
1058 
1062 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1063 {
1064  int x;
1065  int64_t offset_in = offset; /* for logging */
1066 
1067  for (x = 0; x < mxf->partitions_count; x++) {
1068  MXFPartition *p = &mxf->partitions[x];
1069 
1070  if (p->body_sid != body_sid)
1071  continue;
1072 
1073  if (offset < p->essence_length || !p->essence_length) {
1074  *offset_out = p->essence_offset + offset;
1075  return 0;
1076  }
1077 
1078  offset -= p->essence_length;
1079  }
1080 
1081  av_log(mxf->fc, AV_LOG_ERROR,
1082  "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1083  offset_in, body_sid);
1084 
1085  return AVERROR_INVALIDDATA;
1086 }
1087 
1091 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1092 {
1093  int x;
1094  int64_t ret = 0;
1095 
1096  for (x = 0; x < mxf->partitions_count; x++) {
1097  MXFPartition *p = &mxf->partitions[x];
1098 
1099  if (p->body_sid != body_sid)
1100  continue;
1101 
1102  if (!p->essence_length)
1103  return 0;
1104 
1105  ret = p->essence_offset + p->essence_length;
1106  }
1107 
1108  return ret;
1109 }
1110 
1111 /* EditUnit -> absolute offset */
1112 static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
1113 {
1114  int i;
1115  int64_t offset_temp = 0;
1116 
1117  for (i = 0; i < index_table->nb_segments; i++) {
1118  MXFIndexTableSegment *s = index_table->segments[i];
1119 
1120  edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1121 
1122  if (edit_unit < s->index_start_position + s->index_duration) {
1123  int64_t index = edit_unit - s->index_start_position;
1124 
1125  if (s->edit_unit_byte_count)
1126  offset_temp += s->edit_unit_byte_count * index;
1127  else if (s->nb_index_entries) {
1128  if (s->nb_index_entries == 2 * s->index_duration + 1)
1129  index *= 2; /* Avid index */
1130 
1131  if (index < 0 || index >= s->nb_index_entries) {
1132  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1133  index_table->index_sid, s->index_start_position);
1134  return AVERROR_INVALIDDATA;
1135  }
1136 
1137  offset_temp = s->stream_offset_entries[index];
1138  } else {
1139  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1140  index_table->index_sid, s->index_start_position);
1141  return AVERROR_INVALIDDATA;
1142  }
1143 
1144  if (edit_unit_out)
1145  *edit_unit_out = edit_unit;
1146 
1147  return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1148  } else {
1149  /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1150  offset_temp += s->edit_unit_byte_count * s->index_duration;
1151  }
1152  }
1153 
1154  if (nag)
1155  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);
1156 
1157  return AVERROR_INVALIDDATA;
1158 }
1159 
1161 {
1162  int i, j, x;
1163  int8_t max_temporal_offset = -128;
1164 
1165  /* first compute how many entries we have */
1166  for (i = 0; i < index_table->nb_segments; i++) {
1167  MXFIndexTableSegment *s = index_table->segments[i];
1168 
1169  if (!s->nb_index_entries) {
1170  index_table->nb_ptses = 0;
1171  return 0; /* no TemporalOffsets */
1172  }
1173 
1174  index_table->nb_ptses += s->index_duration;
1175  }
1176 
1177  /* paranoid check */
1178  if (index_table->nb_ptses <= 0)
1179  return 0;
1180 
1181  if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1182  return AVERROR(ENOMEM);
1183 
1184  index_table->ptses = av_mallocz(index_table->nb_ptses *
1185  sizeof(int64_t));
1186  index_table->fake_index = av_mallocz(index_table->nb_ptses *
1187  sizeof(AVIndexEntry));
1188  if (!index_table->ptses || !index_table->fake_index) {
1189  av_freep(&index_table->ptses);
1190  return AVERROR(ENOMEM);
1191  }
1192 
1193  /* we may have a few bad TemporalOffsets
1194  * make sure the corresponding PTSes don't have the bogus value 0 */
1195  for (x = 0; x < index_table->nb_ptses; x++)
1196  index_table->ptses[x] = AV_NOPTS_VALUE;
1197 
1225  for (i = x = 0; i < index_table->nb_segments; i++) {
1226  MXFIndexTableSegment *s = index_table->segments[i];
1227  int index_delta = 1;
1228  int n = s->nb_index_entries;
1229 
1230  if (s->nb_index_entries == 2 * s->index_duration + 1) {
1231  index_delta = 2; /* Avid index */
1232  /* ignore the last entry - it's the size of the essence container */
1233  n--;
1234  }
1235 
1236  for (j = 0; j < n; j += index_delta, x++) {
1237  int offset = s->temporal_offset_entries[j] / index_delta;
1238  int index = x + offset;
1239 
1240  if (x >= index_table->nb_ptses) {
1241  av_log(mxf->fc, AV_LOG_ERROR,
1242  "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1244  break;
1245  }
1246 
1247  index_table->fake_index[x].timestamp = x;
1248  index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1249 
1250  if (index < 0 || index >= index_table->nb_ptses) {
1251  av_log(mxf->fc, AV_LOG_ERROR,
1252  "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1253  x, offset, index);
1254  continue;
1255  }
1256 
1257  index_table->ptses[index] = x;
1258  max_temporal_offset = FFMAX(max_temporal_offset, offset);
1259  }
1260  }
1261 
1262  index_table->first_dts = -max_temporal_offset;
1263 
1264  return 0;
1265 }
1266 
1272 {
1273  int i, j, k, ret, nb_sorted_segments;
1274  MXFIndexTableSegment **sorted_segments = NULL;
1275 
1276  if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1277  nb_sorted_segments <= 0) {
1278  av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1279  return 0;
1280  }
1281 
1282  /* sanity check and count unique BodySIDs/IndexSIDs */
1283  for (i = 0; i < nb_sorted_segments; i++) {
1284  if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1285  mxf->nb_index_tables++;
1286  else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1287  av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1288  ret = AVERROR_INVALIDDATA;
1289  goto finish_decoding_index;
1290  }
1291  }
1292 
1294  sizeof(*mxf->index_tables));
1295  if (!mxf->index_tables) {
1296  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1297  ret = AVERROR(ENOMEM);
1298  goto finish_decoding_index;
1299  }
1300 
1301  /* distribute sorted segments to index tables */
1302  for (i = j = 0; i < nb_sorted_segments; i++) {
1303  if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1304  /* next IndexSID */
1305  j++;
1306  }
1307 
1308  mxf->index_tables[j].nb_segments++;
1309  }
1310 
1311  for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1312  MXFIndexTable *t = &mxf->index_tables[j];
1313 
1315  sizeof(*t->segments));
1316 
1317  if (!t->segments) {
1318  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1319  " pointer array\n");
1320  ret = AVERROR(ENOMEM);
1321  goto finish_decoding_index;
1322  }
1323 
1324  if (sorted_segments[i]->index_start_position)
1325  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1326  sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1327 
1328  memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1329  t->index_sid = sorted_segments[i]->index_sid;
1330  t->body_sid = sorted_segments[i]->body_sid;
1331 
1332  if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1333  goto finish_decoding_index;
1334 
1335  /* fix zero IndexDurations */
1336  for (k = 0; k < t->nb_segments; k++) {
1337  if (t->segments[k]->index_duration)
1338  continue;
1339 
1340  if (t->nb_segments > 1)
1341  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1342  t->index_sid, k);
1343 
1344  if (mxf->fc->nb_streams <= 0) {
1345  av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1346  break;
1347  }
1348 
1349  /* assume the first stream's duration is reasonable
1350  * leave index_duration = 0 on further segments in case we have any (unlikely)
1351  */
1352  t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1353  break;
1354  }
1355  }
1356 
1357  ret = 0;
1358 finish_decoding_index:
1359  av_free(sorted_segments);
1360  return ret;
1361 }
1362 
1364 {
1365  return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1367  mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1369 }
1370 
1372 {
1373  MXFPackage *material_package = NULL;
1374  MXFPackage *temp_package = NULL;
1375  int i, j, k, ret;
1376 
1377  av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1378  /* TODO: handle multiple material packages (OP3x) */
1379  for (i = 0; i < mxf->packages_count; i++) {
1380  material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1381  if (material_package) break;
1382  }
1383  if (!material_package) {
1384  av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1385  return AVERROR_INVALIDDATA;
1386  }
1387 
1388  for (i = 0; i < material_package->tracks_count; i++) {
1389  MXFPackage *source_package = NULL;
1390  MXFTrack *material_track = NULL;
1391  MXFTrack *source_track = NULL;
1392  MXFTrack *temp_track = NULL;
1393  MXFDescriptor *descriptor = NULL;
1394  MXFStructuralComponent *component = NULL;
1395  UID *essence_container_ul = NULL;
1396  const MXFCodecUL *codec_ul = NULL;
1397  const MXFCodecUL *container_ul = NULL;
1398  const MXFCodecUL *pix_fmt_ul = NULL;
1399  AVStream *st;
1400 
1401  if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1402  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1403  continue;
1404  }
1405 
1406  if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1407  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1408  continue;
1409  }
1410 
1411  /* TODO: handle multiple source clips */
1412  for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1413  /* TODO: handle timecode component */
1414  component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1415  if (!component)
1416  continue;
1417 
1418  for (k = 0; k < mxf->packages_count; k++) {
1419  temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1420  if (!temp_package)
1421  continue;
1422  if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1423  source_package = temp_package;
1424  break;
1425  }
1426  }
1427  if (!source_package) {
1428  av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1429  break;
1430  }
1431  for (k = 0; k < source_package->tracks_count; k++) {
1432  if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1433  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1434  ret = AVERROR_INVALIDDATA;
1435  goto fail_and_free;
1436  }
1437  if (temp_track->track_id == component->source_track_id) {
1438  source_track = temp_track;
1439  break;
1440  }
1441  }
1442  if (!source_track) {
1443  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1444  break;
1445  }
1446  }
1447  if (!source_track || !component)
1448  continue;
1449 
1450  if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1451  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1452  ret = AVERROR_INVALIDDATA;
1453  goto fail_and_free;
1454  }
1455 
1456  /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1457  * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1458  if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1459  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1460  continue;
1461  }
1462 
1463  st = avformat_new_stream(mxf->fc, NULL);
1464  if (!st) {
1465  av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1466  ret = AVERROR(ENOMEM);
1467  goto fail_and_free;
1468  }
1469  st->id = source_track->track_id;
1470  st->priv_data = source_track;
1471  source_track->original_duration = st->duration = component->duration;
1472  if (st->duration == -1)
1473  st->duration = AV_NOPTS_VALUE;
1474  st->start_time = component->start_position;
1475  if (material_track->edit_rate.num <= 0 ||
1476  material_track->edit_rate.den <= 0) {
1477  av_log(mxf->fc, AV_LOG_WARNING,
1478  "Invalid edit rate (%d/%d) found on stream #%d, "
1479  "defaulting to 25/1\n",
1480  material_track->edit_rate.num,
1481  material_track->edit_rate.den, st->index);
1482  material_track->edit_rate = (AVRational){25, 1};
1483  }
1484  avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1485 
1486  /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1487  * the former is accessible via st->priv_data */
1488  source_track->edit_rate = material_track->edit_rate;
1489 
1490  PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1492  st->codec->codec_type = codec_ul->id;
1493 
1494  source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1495  if (source_package->descriptor) {
1496  if (source_package->descriptor->type == MultipleDescriptor) {
1497  for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1498  MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1499 
1500  if (!sub_descriptor) {
1501  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1502  continue;
1503  }
1504  if (sub_descriptor->linked_track_id == source_track->track_id) {
1505  descriptor = sub_descriptor;
1506  break;
1507  }
1508  }
1509  } else if (source_package->descriptor->type == Descriptor)
1510  descriptor = source_package->descriptor;
1511  }
1512  if (!descriptor) {
1513  av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1514  continue;
1515  }
1516  PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1517  PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1518  essence_container_ul = &descriptor->essence_container_ul;
1519  /* HACK: replacing the original key with mxf_encrypted_essence_container
1520  * is not allowed according to s429-6, try to find correct information anyway */
1521  if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1522  av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1523  for (k = 0; k < mxf->metadata_sets_count; k++) {
1524  MXFMetadataSet *metadata = mxf->metadata_sets[k];
1525  if (metadata->type == CryptoContext) {
1526  essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1527  break;
1528  }
1529  }
1530  }
1531 
1532  /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1533  codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1534  st->codec->codec_id = codec_ul->id;
1535 
1536  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1537  source_track->intra_only = mxf_is_intra_only(descriptor);
1538  container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1539  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1540  st->codec->codec_id = container_ul->id;
1541  st->codec->width = descriptor->width;
1542  /* Field height, not frame height */
1543  st->codec->height = descriptor->height;
1544  switch (descriptor->frame_layout) {
1545  case SegmentedFrame:
1546  /* This one is a weird layout I don't fully understand. */
1547  av_log(mxf->fc, AV_LOG_INFO,
1548  "SegmentedFrame layout isn't currently supported\n");
1549  break;
1550  case FullFrame:
1552  break;
1553  case OneField:
1554  /* Every other line is stored and needs to be duplicated. */
1555  av_log(mxf->fc, AV_LOG_INFO,
1556  "OneField frame layout isn't currently supported\n");
1557  break;
1558  /* The correct thing to do here is fall through, but by
1559  * breaking we might be able to decode some streams at half
1560  * the vertical resolution, rather than not al all.
1561  * It's also for compatibility with the old behavior. */
1562  case SeparateFields:
1563  case MixedFields:
1564  switch (descriptor->field_dominance) {
1565  case MXF_TFF:
1566  st->codec->field_order = AV_FIELD_TT;
1567  break;
1568  case MXF_BFF:
1569  st->codec->field_order = AV_FIELD_BB;
1570  break;
1571  default:
1573  "Field dominance %d support",
1574  descriptor->field_dominance);
1575  break;
1576  }
1577  /* Turn field height into frame height. */
1578  st->codec->height *= 2;
1579  break;
1580  default:
1581  av_log(mxf->fc, AV_LOG_INFO,
1582  "Unknown frame layout type: %d\n",
1583  descriptor->frame_layout);
1584  }
1585  if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1586  st->codec->pix_fmt = descriptor->pix_fmt;
1587  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1589  &descriptor->essence_codec_ul);
1590  st->codec->pix_fmt = pix_fmt_ul->id;
1591  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1592  /* support files created before RP224v10 by defaulting to UYVY422
1593  if subsampling is 4:2:2 and component depth is 8-bit */
1594  if (descriptor->horiz_subsampling == 2 &&
1595  descriptor->vert_subsampling == 1 &&
1596  descriptor->component_depth == 8) {
1598  }
1599  }
1600  }
1601  }
1603  if (material_track->sequence->origin) {
1604  char material_origin[3];
1605  snprintf(material_origin, sizeof(material_origin), "%d", material_track->sequence->origin);
1606  av_dict_set(&st->metadata, "material_track_origin", material_origin, 0);
1607  }
1608  if (source_track->sequence->origin) {
1609  char source_origin[3];
1610  snprintf(source_origin, sizeof(source_origin), "%d", source_track->sequence->origin);
1611  av_dict_set(&st->metadata, "source_track_origin", source_origin, 0);
1612  }
1613  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1614  container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1615  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1616  st->codec->codec_id = container_ul->id;
1617  st->codec->channels = descriptor->channels;
1618  st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1619 
1620  if (descriptor->sample_rate.den > 0) {
1621  st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1622  avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1623  } else {
1624  av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1625  "found for stream #%d, time base forced to 1/48000\n",
1626  descriptor->sample_rate.num, descriptor->sample_rate.den,
1627  st->index);
1628  avpriv_set_pts_info(st, 64, 1, 48000);
1629  }
1630 
1631  /* if duration is set, rescale it from EditRate to SampleRate */
1632  if (st->duration != AV_NOPTS_VALUE)
1633  st->duration = av_rescale_q(st->duration,
1634  av_inv_q(material_track->edit_rate),
1635  st->time_base);
1636 
1637  /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1638  if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1639  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1641  else if (descriptor->bits_per_sample == 32)
1643  } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1644  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1646  else if (descriptor->bits_per_sample == 32)
1648  } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1650  }
1651  } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1652  int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
1653  essence_container_ul)->id;
1654  if (codec_id >= 0 &&
1655  codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
1656  av_dict_set(&st->metadata, "data_type",
1657  mxf_data_essence_descriptor[codec_id], 0);
1658  }
1659  }
1660  if (descriptor->extradata) {
1662  if (st->codec->extradata) {
1663  memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1664  st->codec->extradata_size = descriptor->extradata_size;
1665  }
1666  } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1667  ret = ff_generate_avci_extradata(st);
1668  if (ret < 0)
1669  return ret;
1670  }
1671  if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1672  /* TODO: decode timestamps */
1674  }
1675  }
1676 
1677  ret = 0;
1678 fail_and_free:
1679  return ret;
1680 }
1681 
1682 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1683 {
1684  int ret;
1685  size_t buf_size;
1686 
1687  if (size < 0)
1688  return AVERROR(EINVAL);
1689 
1690  buf_size = size + size / 2 + 1;
1691  *str = av_malloc(buf_size);
1692  if (!*str)
1693  return AVERROR(ENOMEM);
1694 
1695  if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1696  av_freep(str);
1697  return ret;
1698  }
1699 
1700  return ret;
1701 }
1702 
1703 static int mxf_uid_to_str(UID uid, char **str)
1704 {
1705  int i;
1706  char *p;
1707  p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1708  if (!p)
1709  return AVERROR(ENOMEM);
1710  for (i = 0; i < sizeof(UID); i++) {
1711  snprintf(p, 2 + 1, "%.2x", uid[i]);
1712  p += 2;
1713  if (i == 3 || i == 5 || i == 7 || i == 9) {
1714  snprintf(p, 1 + 1, "-");
1715  p++;
1716  }
1717  }
1718  return 0;
1719 }
1720 
1721 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1722 {
1723  struct tm time = { 0 };
1724  time.tm_year = (timestamp >> 48) - 1900;
1725  time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1726  time.tm_mday = (timestamp >> 32 & 0xFF);
1727  time.tm_hour = (timestamp >> 24 & 0xFF);
1728  time.tm_min = (timestamp >> 16 & 0xFF);
1729  time.tm_sec = (timestamp >> 8 & 0xFF);
1730 
1731  /* msvcrt versions of strftime calls the invalid parameter handler
1732  * (aborting the process if one isn't set) if the parameters are out
1733  * of range. */
1734  time.tm_mon = av_clip(time.tm_mon, 0, 11);
1735  time.tm_mday = av_clip(time.tm_mday, 1, 31);
1736  time.tm_hour = av_clip(time.tm_hour, 0, 23);
1737  time.tm_min = av_clip(time.tm_min, 0, 59);
1738  time.tm_sec = av_clip(time.tm_sec, 0, 59);
1739 
1740  *str = av_mallocz(32);
1741  if (!*str)
1742  return AVERROR(ENOMEM);
1743  strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1744 
1745  return 0;
1746 }
1747 
1748 #define SET_STR_METADATA(pb, name, str) do { \
1749  if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1750  return ret; \
1751  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1752 } while (0)
1753 
1754 #define SET_UID_METADATA(pb, name, var, str) do { \
1755  avio_read(pb, var, 16); \
1756  if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1757  return ret; \
1758  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1759 } while (0)
1760 
1761 #define SET_TS_METADATA(pb, name, var, str) do { \
1762  var = avio_rb64(pb); \
1763  if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1764  return ret; \
1765  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1766 } while (0)
1767 
1768 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1769 {
1770  MXFContext *mxf = arg;
1771  AVFormatContext *s = mxf->fc;
1772  int ret;
1773  UID uid = { 0 };
1774  char *str = NULL;
1775  uint64_t ts;
1776  switch (tag) {
1777  case 0x3C01:
1778  SET_STR_METADATA(pb, "company_name", str);
1779  break;
1780  case 0x3C02:
1781  SET_STR_METADATA(pb, "product_name", str);
1782  break;
1783  case 0x3C04:
1784  SET_STR_METADATA(pb, "product_version", str);
1785  break;
1786  case 0x3C05:
1787  SET_UID_METADATA(pb, "product_uid", uid, str);
1788  break;
1789  case 0x3C06:
1790  SET_TS_METADATA(pb, "modification_date", ts, str);
1791  break;
1792  case 0x3C08:
1793  SET_STR_METADATA(pb, "application_platform", str);
1794  break;
1795  case 0x3C09:
1796  SET_UID_METADATA(pb, "generation_uid", uid, str);
1797  break;
1798  case 0x3C0A:
1799  SET_UID_METADATA(pb, "uid", uid, str);
1800  break;
1801  }
1802  return 0;
1803 }
1804 
1806  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1807 // { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_pack },
1808  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1809  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1810  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1811  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1812  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1813  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1814  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1815  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1816  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1817  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1818  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1819  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1820  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1821  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1822  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1823  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1824  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1825  { { 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 */
1826  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1827  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1828  { { 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 */
1829  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1830  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1831  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
1832  { { 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 */
1833  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
1834  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1835  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1836  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1837  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1838  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1839 };
1840 
1841 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1842 {
1843  AVIOContext *pb = mxf->fc->pb;
1844  MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1845  uint64_t klv_end = avio_tell(pb) + klv->length;
1846 
1847  if (!ctx)
1848  return AVERROR(ENOMEM);
1849  while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1850  int ret;
1851  int tag = avio_rb16(pb);
1852  int size = avio_rb16(pb); /* KLV specified by 0x53 */
1853  uint64_t next = avio_tell(pb) + size;
1854  UID uid = {0};
1855 
1856  av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1857  if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1858  av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1859  continue;
1860  }
1861  if (tag > 0x7FFF) { /* dynamic tag */
1862  int i;
1863  for (i = 0; i < mxf->local_tags_count; i++) {
1864  int local_tag = AV_RB16(mxf->local_tags+i*18);
1865  if (local_tag == tag) {
1866  memcpy(uid, mxf->local_tags+i*18+2, 16);
1867  av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1868  PRINT_KEY(mxf->fc, "uid", uid);
1869  }
1870  }
1871  }
1872  if (ctx_size && tag == 0x3C0A)
1873  avio_read(pb, ctx->uid, 16);
1874  else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1875  return ret;
1876 
1877  /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1878  * it extending past the end of the KLV though (zzuf5.mxf). */
1879  if (avio_tell(pb) > klv_end) {
1880  if (ctx_size)
1881  av_free(ctx);
1882 
1883  av_log(mxf->fc, AV_LOG_ERROR,
1884  "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1885  tag, klv->offset);
1886  return AVERROR_INVALIDDATA;
1887  } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1888  avio_seek(pb, next, SEEK_SET);
1889  }
1890  if (ctx_size) ctx->type = type;
1891  return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1892 }
1893 
1899 {
1900  AVIOContext *pb = mxf->fc->pb;
1901 
1902  if (!mxf->current_partition ||
1904  return 0; /* we've parsed all partitions */
1905 
1906  /* seek to previous partition */
1907  avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1908  mxf->current_partition = NULL;
1909 
1910  av_dlog(mxf->fc, "seeking to previous partition\n");
1911 
1912  return 1;
1913 }
1914 
1920 {
1921  AVIOContext *pb = mxf->fc->pb;
1922  int64_t ret;
1923 
1924  if (mxf->parsing_backward) {
1925  return mxf_seek_to_previous_partition(mxf);
1926  } else {
1927  uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1928  : mxf->last_partition;
1929 
1930  if (!offset) {
1931  av_dlog(mxf->fc, "no last partition\n");
1932  return 0;
1933  }
1934 
1935  av_dlog(mxf->fc, "seeking to last partition\n");
1936 
1937  /* remember where we were so we don't end up seeking further back than this */
1938  mxf->last_forward_tell = avio_tell(pb);
1939 
1940  if (!pb->seekable) {
1941  av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1942  return -1;
1943  }
1944 
1945  /* seek to last partition and parse backward */
1946  if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1947  av_log(mxf->fc, AV_LOG_ERROR,
1948  "failed to seek to last partition @ 0x%" PRIx64
1949  " (%"PRId64") - partial file?\n",
1950  mxf->run_in + offset, ret);
1951  return ret;
1952  }
1953 
1954  mxf->current_partition = NULL;
1955  mxf->parsing_backward = 1;
1956  }
1957 
1958  return 1;
1959 }
1960 
1966 {
1967  return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1968 }
1969 
1975 {
1976  int x;
1977 
1978  /* everything is already correct */
1979  if (mxf->op == OPAtom)
1980  return;
1981 
1982  for (x = 0; x < mxf->partitions_count; x++) {
1983  MXFPartition *p = &mxf->partitions[x];
1984 
1985  if (!p->body_sid)
1986  continue; /* BodySID == 0 -> no essence */
1987 
1988  if (x >= mxf->partitions_count - 1)
1989  break; /* last partition - can't compute length (and we don't need to) */
1990 
1991  /* essence container spans to the next partition */
1993 
1994  if (p->essence_length < 0) {
1995  /* next ThisPartition < essence_offset */
1996  p->essence_length = 0;
1997  av_log(mxf->fc, AV_LOG_ERROR,
1998  "partition %i: bad ThisPartition = %"PRIX64"\n",
1999  x+1, mxf->partitions[x+1].this_partition);
2000  }
2001  }
2002 }
2003 
2004 static int64_t round_to_kag(int64_t position, int kag_size)
2005 {
2006  /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2007  /* NOTE: kag_size may be any integer between 1 - 2^10 */
2008  int64_t ret = (position / kag_size) * kag_size;
2009  return ret == position ? ret : ret + kag_size;
2010 }
2011 
2013  MXFContext *mxf,
2014  KLVPacket *klv)
2015 {
2016  MXFPartition *cur_part = mxf->current_partition;
2017  /* for OP1a we compute essence_offset
2018  * for OPAtom we point essence_offset after the KL
2019  * (usually op1a_essence_offset + 20 or 25)
2020  * TODO: for OP1a we could eliminate this entire if statement, always
2021  * stopping parsing at op1a_essence_offset
2022  * for OPAtom we still need the actual essence_offset though
2023  * (the KL's length can vary)
2024  */
2025  int64_t op1a_essence_offset =
2026  round_to_kag(cur_part->this_partition + cur_part->pack_length,
2027  cur_part->kag_size) +
2028  round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
2029  round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
2030 
2031  if (mxf->op == OPAtom) {
2032  /* point essence_offset to the actual data
2033  * OPAtom has all the essence in one big KLV
2034  */
2035  cur_part->essence_offset = avio_tell(s->pb);
2036  cur_part->essence_length = klv->length;
2037  } else {
2038  /* NOTE: op1a_essence_offset may be less than to klv.offset
2039  * (C0023S01.mxf) */
2040  cur_part->essence_offset = op1a_essence_offset;
2041  }
2042 }
2043 
2044 static int is_pcm(enum AVCodecID codec_id)
2045 {
2046  /* we only care about "normal" PCM codecs until we get samples */
2047  return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2048 }
2049 
2056 {
2057  MXFContext *mxf = s->priv_data;
2058 
2059  /* assuming non-OPAtom == frame wrapped
2060  * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2061  if (mxf->op != OPAtom)
2062  return;
2063 
2064  /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2065  if (s->nb_streams != 1 ||
2067  !is_pcm(s->streams[0]->codec->codec_id) ||
2068  mxf->nb_index_tables != 1 ||
2069  mxf->index_tables[0].nb_segments != 1 ||
2070  mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2071  return;
2072 
2073  /* arbitrarily default to 48 kHz PAL audio frame size */
2074  /* TODO: We could compute this from the ratio between the audio
2075  * and video edit rates for 48 kHz NTSC we could use the
2076  * 1802-1802-1802-1802-1801 pattern. */
2077  mxf->edit_units_per_packet = 1920;
2078 }
2079 
2081 {
2082  MXFContext *mxf = s->priv_data;
2083  uint32_t length;
2084  int64_t file_size;
2085  KLVPacket klv;
2086 
2087  if (!s->pb->seekable)
2088  return;
2089 
2090  file_size = avio_size(s->pb);
2091  avio_seek(s->pb, file_size - 4, SEEK_SET);
2092  length = avio_rb32(s->pb);
2093  if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2094  goto end;
2095  avio_seek(s->pb, file_size - length, SEEK_SET);
2096  if (klv_read_packet(&klv, s->pb) < 0 ||
2098  klv.length != length - 20)
2099  goto end;
2100 
2101  avio_skip(s->pb, klv.length - 12);
2102  mxf->last_partition = avio_rb64(s->pb);
2103 
2104 end:
2105  avio_seek(s->pb, mxf->run_in, SEEK_SET);
2106 }
2107 
2109 {
2110  MXFContext *mxf = s->priv_data;
2111  KLVPacket klv;
2112  int64_t essence_offset = 0;
2113  int ret;
2114 
2115  mxf->last_forward_tell = INT64_MAX;
2116  mxf->edit_units_per_packet = 1;
2117 
2119  av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2120  return AVERROR_INVALIDDATA;
2121  }
2122  avio_seek(s->pb, -14, SEEK_CUR);
2123  mxf->fc = s;
2124  mxf->run_in = avio_tell(s->pb);
2125 
2127 
2128  while (!s->pb->eof_reached) {
2129 
2130  const MXFMetadataReadTableEntry *metadata;
2131 
2132  if (klv_read_packet(&klv, s->pb) < 0) {
2133  /* EOF - seek to previous partition or stop */
2134  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2135  break;
2136  else
2137  continue;
2138  }
2139 
2140  PRINT_KEY(s, "read header", klv.key);
2141  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2146 
2147  if (!mxf->current_partition) {
2148  av_log(mxf->fc, AV_LOG_ERROR,
2149  "found essence prior to first PartitionPack\n");
2150  return AVERROR_INVALIDDATA;
2151  }
2152 
2153  if (!mxf->current_partition->essence_offset) {
2154  compute_partition_essence_offset(s, mxf, &klv);
2155  }
2156 
2157  if (!essence_offset)
2158  essence_offset = klv.offset;
2159 
2160  /* seek to footer, previous partition or stop */
2161  if (mxf_parse_handle_essence(mxf) <= 0)
2162  break;
2163  continue;
2164  } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2165  klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2166  /* next partition pack - keep going, seek to previous partition or stop */
2167  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2168  break;
2169  else if (mxf->parsing_backward)
2170  continue;
2171  /* we're still parsing forward. proceed to parsing this partition pack */
2172  }
2173 
2174  for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2175  if (IS_KLV_KEY(klv.key, metadata->key)) {
2176  int res;
2177  if (klv.key[5] == 0x53) {
2178  res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2179  } else {
2180  uint64_t next = avio_tell(s->pb) + klv.length;
2181  res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2182 
2183  /* only seek forward, else this can loop for a long time */
2184  if (avio_tell(s->pb) > next) {
2185  av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2186  klv.offset);
2187  return AVERROR_INVALIDDATA;
2188  }
2189 
2190  avio_seek(s->pb, next, SEEK_SET);
2191  }
2192  if (res < 0) {
2193  av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2194  return res;
2195  }
2196  break;
2197  } else {
2198  av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2199  UID_ARG(klv.key));
2200  }
2201  }
2202  if (!metadata->read)
2203  avio_skip(s->pb, klv.length);
2204  }
2205  /* FIXME avoid seek */
2206  if (!essence_offset) {
2207  av_log(s, AV_LOG_ERROR, "no essence\n");
2208  return AVERROR_INVALIDDATA;
2209  }
2210  avio_seek(s->pb, essence_offset, SEEK_SET);
2211 
2213 
2214  /* we need to do this before computing the index tables
2215  * to be able to fill in zero IndexDurations with st->duration */
2216  if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2217  return ret;
2218 
2219  if ((ret = mxf_compute_index_tables(mxf)) < 0)
2220  return ret;
2221 
2222  if (mxf->nb_index_tables > 1) {
2223  /* TODO: look up which IndexSID to use via EssenceContainerData */
2224  av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2225  mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2226  } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2227  av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2228  return AVERROR_INVALIDDATA;
2229  }
2230 
2232 
2233  return 0;
2234 }
2235 
2240 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2241 {
2242  int64_t last_ofs = -1, next_ofs = -1;
2243  MXFIndexTable *t = &mxf->index_tables[0];
2244 
2245  /* this is called from the OP1a demuxing logic, which means there
2246  * may be no index tables */
2247  if (mxf->nb_index_tables <= 0)
2248  return -1;
2249 
2250  /* find mxf->current_edit_unit so that the next edit unit starts ahead
2251  * of current_offset */
2252  while (mxf->current_edit_unit >= 0) {
2253  if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2254  NULL, &next_ofs, 0) < 0)
2255  return -1;
2256 
2257  if (next_ofs <= last_ofs) {
2258  /* large next_ofs didn't change or current_edit_unit wrapped
2259  * around this fixes the infinite loop on zzuf3.mxf */
2260  av_log(mxf->fc, AV_LOG_ERROR,
2261  "next_ofs didn't change. not deriving packet timestamps\n");
2262  return -1;
2263  }
2264 
2265  if (next_ofs > current_offset)
2266  break;
2267 
2268  last_ofs = next_ofs;
2269  mxf->current_edit_unit++;
2270  }
2271 
2272  /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2273  * may lack IndexEntryArrays */
2274  if (mxf->current_edit_unit < 0)
2275  return -1;
2276 
2277  return next_ofs;
2278 }
2279 
2280 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2281  uint64_t *sample_count)
2282 {
2283  int i, total = 0, size = 0;
2284  AVStream *st = mxf->fc->streams[stream_index];
2285  MXFTrack *track = st->priv_data;
2286  AVRational time_base = av_inv_q(track->edit_rate);
2287  AVRational sample_rate = av_inv_q(st->time_base);
2288  const MXFSamplesPerFrame *spf = NULL;
2289 
2290  if ((sample_rate.num / sample_rate.den) == 48000)
2291  spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2292  if (!spf) {
2293  int remainder = (sample_rate.num * time_base.num) %
2294  (time_base.den * sample_rate.den);
2295  *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2296  av_mul_q(sample_rate, time_base)));
2297  if (remainder)
2298  av_log(mxf->fc, AV_LOG_WARNING,
2299  "seeking detected on stream #%d with time base (%d/%d) and "
2300  "sample rate (%d/%d), audio pts won't be accurate.\n",
2301  stream_index, time_base.num, time_base.den,
2302  sample_rate.num, sample_rate.den);
2303  return 0;
2304  }
2305 
2306  while (spf->samples_per_frame[size]) {
2307  total += spf->samples_per_frame[size];
2308  size++;
2309  }
2310 
2311  if (!size)
2312  return 0;
2313 
2314  *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2315  for (i = 0; i < mxf->current_edit_unit % size; i++) {
2316  *sample_count += spf->samples_per_frame[i];
2317  }
2318 
2319  return 0;
2320 }
2321 
2323  AVPacket *pkt)
2324 {
2325  MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2326  int64_t bits_per_sample = codec->bits_per_coded_sample;
2327 
2328  if (!bits_per_sample)
2329  bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2330 
2331  pkt->pts = track->sample_count;
2332 
2333  if (codec->channels <= 0 || codec->channels * bits_per_sample < 8)
2334  return AVERROR_INVALIDDATA;
2335 
2336  track->sample_count += pkt->size / (codec->channels * bits_per_sample / 8);
2337  return 0;
2338 }
2339 
2341 {
2342  KLVPacket klv;
2343  MXFContext *mxf = s->priv_data;
2344  int ret;
2345 
2346  while (!s->pb->eof_reached) {
2347  if ((ret = klv_read_packet(&klv, s->pb)) < 0)
2348  return ret;
2349  PRINT_KEY(s, "read packet", klv.key);
2350  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2352  ret = mxf_decrypt_triplet(s, pkt, &klv);
2353  if (ret < 0) {
2354  av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2355  return ret;
2356  }
2357  return 0;
2358  }
2361  int index = mxf_get_stream_index(s, &klv);
2362  int64_t next_ofs, next_klv;
2363  AVStream *st;
2364  MXFTrack *track;
2365  AVCodecContext *codec;
2366 
2367  if (index < 0) {
2368  av_log(s, AV_LOG_ERROR,
2369  "error getting stream index %"PRIu32"\n",
2370  AV_RB32(klv.key + 12));
2371  goto skip;
2372  }
2373 
2374  st = s->streams[index];
2375  track = st->priv_data;
2376 
2377  if (s->streams[index]->discard == AVDISCARD_ALL)
2378  goto skip;
2379 
2380  next_klv = avio_tell(s->pb) + klv.length;
2381  next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2382 
2383  if (next_ofs >= 0 && next_klv > next_ofs) {
2384  /* if this check is hit then it's possible OPAtom was treated
2385  * as OP1a truncate the packet since it's probably very large
2386  * (>2 GiB is common) */
2388  "OPAtom misinterpreted as OP1a?"
2389  "KLV for edit unit %i extending into "
2390  "next edit unit",
2391  mxf->current_edit_unit);
2392  klv.length = next_ofs - avio_tell(s->pb);
2393  }
2394 
2395  /* check for 8 channels AES3 element */
2396  if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2397  ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2398  pkt, klv.length);
2399  if (ret < 0) {
2400  av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2401  return ret;
2402  }
2403  } else {
2404  ret = av_get_packet(s->pb, pkt, klv.length);
2405  if (ret < 0)
2406  return ret;
2407  }
2408  pkt->stream_index = index;
2409  pkt->pos = klv.offset;
2410 
2411  codec = s->streams[index]->codec;
2412 
2413  if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2414  /* mxf->current_edit_unit good - see if we have an
2415  * index table to derive timestamps from */
2416  MXFIndexTable *t = &mxf->index_tables[0];
2417 
2418  if (mxf->nb_index_tables >= 1 &&
2419  mxf->current_edit_unit < t->nb_ptses) {
2420  pkt->dts = mxf->current_edit_unit + t->first_dts;
2421  pkt->pts = t->ptses[mxf->current_edit_unit];
2422  } else if (track->intra_only) {
2423  /* intra-only -> PTS = EditUnit.
2424  * let utils.c figure out DTS since it can be
2425  * < PTS if low_delay = 0 (Sony IMX30) */
2426  pkt->pts = mxf->current_edit_unit;
2427  }
2428  } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2429  ret = mxf_set_audio_pts(mxf, codec, pkt);
2430  if (ret < 0)
2431  return ret;
2432  }
2433 
2434  /* seek for truncated packets */
2435  avio_seek(s->pb, next_klv, SEEK_SET);
2436 
2437  return 0;
2438  } else
2439  skip:
2440  avio_skip(s->pb, klv.length);
2441  }
2442  return AVERROR_EOF;
2443 }
2444 
2446 {
2447  MXFContext *mxf = s->priv_data;
2448  int ret, size;
2449  int64_t ret64, pos, next_pos;
2450  AVStream *st;
2451  MXFIndexTable *t;
2452  int edit_units;
2453 
2454  if (mxf->op != OPAtom)
2455  return mxf_read_packet_old(s, pkt);
2456 
2457  /* OPAtom - clip wrapped demuxing */
2458  /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2459  st = s->streams[0];
2460  t = &mxf->index_tables[0];
2461 
2462  if (mxf->current_edit_unit >= st->duration)
2463  return AVERROR_EOF;
2464 
2465  edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2466 
2467  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2468  return ret;
2469 
2470  /* compute size by finding the next edit unit or the end of the essence container
2471  * not pretty, but it works */
2472  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2473  (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2474  av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2475  return AVERROR_INVALIDDATA;
2476  }
2477 
2478  if ((size = next_pos - pos) <= 0) {
2479  av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2480  return AVERROR_INVALIDDATA;
2481  }
2482 
2483  if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2484  return ret64;
2485 
2486  if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2487  return ret < 0 ? ret : AVERROR_EOF;
2488 
2489  pkt->stream_index = 0;
2490 
2491  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2492  mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2493  pkt->dts = mxf->current_edit_unit + t->first_dts;
2494  pkt->pts = t->ptses[mxf->current_edit_unit];
2495  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2496  int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2497  if (ret < 0)
2498  return ret;
2499  }
2500 
2501  mxf->current_edit_unit += edit_units;
2502 
2503  return 0;
2504 }
2505 
2506 
2508 {
2509  MXFContext *mxf = s->priv_data;
2510  MXFIndexTableSegment *seg;
2511  int i;
2512 
2513  av_freep(&mxf->packages_refs);
2514 
2515  for (i = 0; i < s->nb_streams; i++)
2516  s->streams[i]->priv_data = NULL;
2517 
2518  for (i = 0; i < mxf->metadata_sets_count; i++) {
2519  switch (mxf->metadata_sets[i]->type) {
2520  case Descriptor:
2521  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2522  break;
2523  case MultipleDescriptor:
2524  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2525  break;
2526  case Sequence:
2527  av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2528  break;
2529  case SourcePackage:
2530  case MaterialPackage:
2531  av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2532  break;
2533  case IndexTableSegment:
2534  seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2536  av_freep(&seg->flag_entries);
2538  break;
2539  default:
2540  break;
2541  }
2542  av_freep(&mxf->metadata_sets[i]);
2543  }
2544  av_freep(&mxf->partitions);
2545  av_freep(&mxf->metadata_sets);
2546  av_freep(&mxf->aesc);
2547  av_freep(&mxf->local_tags);
2548 
2549  for (i = 0; i < mxf->nb_index_tables; i++) {
2550  av_freep(&mxf->index_tables[i].segments);
2551  av_freep(&mxf->index_tables[i].ptses);
2552  av_freep(&mxf->index_tables[i].fake_index);
2553  }
2554  av_freep(&mxf->index_tables);
2555 
2556  return 0;
2557 }
2558 
2559 static int mxf_probe(AVProbeData *p) {
2560  uint8_t *bufp = p->buf;
2561  uint8_t *end = p->buf + p->buf_size;
2562 
2563  if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2564  return 0;
2565 
2566  /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2567  end -= sizeof(mxf_header_partition_pack_key);
2568  for (; bufp < end; bufp++) {
2570  return AVPROBE_SCORE_MAX;
2571  }
2572  return 0;
2573 }
2574 
2575 /* rudimentary byte seek */
2576 /* XXX: use MXF Index */
2577 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2578 {
2579  AVStream *st = s->streams[stream_index];
2580  int64_t seconds;
2581  MXFContext* mxf = s->priv_data;
2582  int64_t seekpos;
2583  int i, ret;
2584  MXFIndexTable *t;
2585  MXFTrack *source_track = st->priv_data;
2586 
2587  /* if audio then truncate sample_time to EditRate */
2588  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2589  sample_time = av_rescale_q(sample_time, st->time_base,
2590  av_inv_q(source_track->edit_rate));
2591 
2592  if (mxf->nb_index_tables <= 0) {
2593  if (!s->bit_rate)
2594  return AVERROR_INVALIDDATA;
2595  if (sample_time < 0)
2596  sample_time = 0;
2597  seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2598 
2599  seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2600  if (seekpos < 0)
2601  return seekpos;
2602 
2603  ff_update_cur_dts(s, st, sample_time);
2604  mxf->current_edit_unit = sample_time;
2605  } else {
2606  t = &mxf->index_tables[0];
2607 
2608  /* clamp above zero, else ff_index_search_timestamp() returns negative
2609  * this also means we allow seeking before the start */
2610  sample_time = FFMAX(sample_time, 0);
2611 
2612  if (t->fake_index) {
2613  /* behave as if we have a proper index */
2614  if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2615  return sample_time;
2616  } else {
2617  /* no IndexEntryArray (one or more CBR segments)
2618  * make sure we don't seek past the end */
2619  sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2620  }
2621 
2622  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2623  return ret;
2624 
2625  ff_update_cur_dts(s, st, sample_time);
2626  mxf->current_edit_unit = sample_time;
2627  avio_seek(s->pb, seekpos, SEEK_SET);
2628  }
2629 
2630  // Update all tracks sample count
2631  for (i = 0; i < s->nb_streams; i++) {
2632  AVStream *cur_st = s->streams[i];
2633  MXFTrack *cur_track = cur_st->priv_data;
2634  uint64_t current_sample_count = 0;
2635  if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2636  ret = mxf_compute_sample_count(mxf, i, &current_sample_count);
2637  if (ret < 0)
2638  return ret;
2639 
2640  cur_track->sample_count = current_sample_count;
2641  }
2642  }
2643  return 0;
2644 }
2645 
2647  .name = "mxf",
2648  .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2649  .priv_data_size = sizeof(MXFContext),
2650  .read_probe = mxf_probe,
2655 };
static const uint8_t mxf_crypto_source_container_ul[]
Definition: mxfdec.c:247
static void mxf_compute_essence_containers(MXFContext *mxf)
Figure out the proper offset and length of the essence container in each partition.
Definition: mxfdec.c:1974
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:84
full parsing and interpolation of timestamps for frames not starting on a packet boundary ...
Definition: avformat.h:655
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
static int mxf_parse_structural_metadata(MXFContext *mxf)
Definition: mxfdec.c:1371
MXFMetadataSetType
Definition: mxf.h:30
Bytestream IO Context.
Definition: avio.h:68
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:241
uint8_t origin
Definition: mxfdec.c:114
unsigned int component_depth
Definition: mxfdec.c:145
int size
KLVPacket current_klv_data
Definition: mxfdec.c:212
uint64_t last_partition
Definition: mxfdec.c:210
static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:777
Definition: mxf.h:38
static const MXFMetadataReadTableEntry mxf_metadata_read_table[]
Definition: mxfdec.c:1805
int current_edit_unit
Definition: mxfdec.c:219
#define PRINT_KEY(pc, s, x)
Definition: mxf.h:119
int index_sid
Definition: mxfdec.c:188
static int klv_read_packet(KLVPacket *klv, AVIOContext *pb)
Definition: mxfdec.c:283
UID * structural_components_refs
Definition: mxfdec.c:111
MXFOP
Definition: mxfdec.c:61
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
static int mxf_seek_to_previous_partition(MXFContext *mxf)
Seeks to the previous partition, if possible.
Definition: mxfdec.c:1898
int edit_unit_byte_count
Definition: mxfdec.c:159
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:998
static int mxf_probe(AVProbeData *p)
Definition: mxfdec.c:2559
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:101
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:2829
int64_t * ptses
Definition: mxfdec.c:192
UID sequence_ref
Definition: mxfdec.c:121
static void mxf_read_random_index_pack(AVFormatContext *s)
Definition: mxfdec.c:2080
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:700
#define SET_TS_METADATA(pb, name, var, str)
Definition: mxfdec.c:1761
int size
Definition: avcodec.h:974
Definition: mxf.h:34
uint64_t footer_partition
Definition: mxfdec.c:211
int closed
Definition: mxfdec.c:76
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:186
enum MXFMetadataSetType type
Definition: mxfdec.c:237
void av_aes_crypt(AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)
Encrypt or decrypt a buffer using a previously initialized context.
Definition: aes.c:145
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
Definition: mxfdec.c:2577
static int mxf_uid_to_str(UID uid, char **str)
Definition: mxfdec.c:1703
static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
Definition: mxfdec.c:309
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
MXFSequence * sequence
Definition: mxfdec.c:120
int linked_track_id
Definition: mxfdec.c:150
UID key
Definition: mxf.h:59
int64_t offset
Definition: mxf.h:60
void * priv_data
Definition: avformat.h:719
#define FF_ARRAY_ELEMS(a)
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
discard all
Definition: avcodec.h:568
Definition: mxfdec.c:68
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
Internal version of av_index_search_timestamp.
Definition: utils.c:1189
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:591
#define sample
static int mxf_read_header(AVFormatContext *s)
Definition: mxfdec.c:2108
UID source_container_ul
Definition: mxfdec.c:94
int id
Definition: mxf.h:67
enum MXFMetadataSetType type
Definition: mxfdec.c:132
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
Definition: mxfdec.c:67
static int mxf_parse_handle_partition_or_eof(MXFContext *mxf)
Called when the next partition or EOF is encountered.
Definition: mxfdec.c:1965
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
Definition: mxfdec.c:1841
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mxfdec.c:2445
Format I/O context.
Definition: avformat.h:922
Definition: mxfdec.c:65
static int is_pcm(enum AVCodecID codec_id)
Definition: mxfdec.c:2044
uint8_t UID[16]
Definition: mxf.h:28
int frame_layout
Definition: mxfdec.c:139
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1104
Definition: mxfdec.c:58
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
UID * packages_refs
Definition: mxfdec.c:202
uint8_t
UID * tracks_refs
Definition: mxfdec.c:175
int64_t first_dts
Definition: mxfdec.c:191
const MXFSamplesPerFrame * ff_mxf_get_samples_per_frame(AVFormatContext *s, AVRational time_base)
Definition: mxf.c:131
Opaque data information usually continuous.
Definition: avutil.h:189
static const uint8_t mxf_avid_essence_element_key[]
Definition: mxfdec.c:243
int bits_per_sample
Definition: mxfdec.c:144
Definition: mxfdec.c:227
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:606
#define AV_RB32
Definition: intreadwrite.h:130
AVRational index_edit_rate
Definition: mxfdec.c:162
enum AVStreamParseType need_parsing
Definition: avformat.h:867
int id
Format-specific stream ID.
Definition: avformat.h:706
#define b
Definition: input.c:52
static int mxf_read_close(AVFormatContext *s)
Definition: mxfdec.c:2507
Definition: mxf.h:58
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1164
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:2521
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:990
#define UID_ARG(x)
Definition: mxf.h:88
static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
Computes the absolute file offset of the given essence container offset.
Definition: mxfdec.c:1062
int complete
Definition: mxfdec.c:77
static void compute_partition_essence_offset(AVFormatContext *s, MXFContext *mxf, KLVPacket *klv)
Definition: mxfdec.c:2012
static const uint8_t mxf_klv_key[]
Definition: mxfdec.c:245
int MXFMetadataReadFunc(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:231
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:69
static int mxf_compute_index_tables(MXFContext *mxf)
Sorts and collects index table segments into index tables.
Definition: mxfdec.c:1271
MXFIndexTableSegment ** segments
Definition: mxfdec.c:194
const MXFCodecUL ff_mxf_codec_uls[]
Definition: mxf.c:34
uint8_t * data
Definition: avcodec.h:973
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:79
static const uint8_t mxf_sony_mpeg4_extradata[]
Definition: mxfdec.c:251
static int flags
Definition: log.c:44
uint32_t tag
Definition: movenc.c:844
Definition: mxfdec.c:226
#define AVERROR_EOF
End of file.
Definition: error.h:51
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:139
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:117
Definition: mxfdec.c:63
Definition: ismindex.c:65
uint64_t avio_rb64(AVIOContext *s)
Definition: aviobuf.c:671
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:219
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2523
static const MXFCodecUL mxf_intra_only_essence_container_uls[]
Definition: mxfdec.c:962
unsigned int vert_subsampling
Definition: mxfdec.c:147
int intra_only
Definition: mxfdec.c:125
int32_t kag_size
Definition: mxfdec.c:85
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:463
static const uint8_t mxf_random_index_pack_key[]
Definition: mxfdec.c:250
static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
Definition: mxfdec.c:993
uint8_t track_number[4]
Definition: mxfdec.c:123
static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
Definition: mxfdec.c:1721
int64_t original_duration
Definition: mxfdec.c:127
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:129
#define SET_UID_METADATA(pb, name, var, str)
Definition: mxfdec.c:1754
static int mxf_read_sync(AVIOContext *pb, const uint8_t *key, unsigned size)
Definition: mxfdec.c:270
#define AVINDEX_KEYFRAME
Definition: avformat.h:662
int metadata_sets_count
Definition: mxfdec.c:205
UID essence_container_ul
Definition: mxfdec.c:133
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:167
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:105
int64_t start_position
Definition: mxfdec.c:103
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
int last_forward_partition
Definition: mxfdec.c:218
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:2064
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
MXFPartitionType
Definition: mxfdec.c:55
static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
Definition: mxfdec.c:814
UID essence_codec_ul
Definition: mxfdec.c:134
int8_t * temporal_offset_entries
Definition: mxfdec.c:165
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:681
static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_table, int64_t edit_unit, int64_t *edit_unit_out, int64_t *offset_out, int nag)
Definition: mxfdec.c:1112
MXFDescriptor * descriptor
Definition: mxfdec.c:177
int64_t timestamp
Definition: avformat.h:661
uint64_t index_start_position
Definition: mxfdec.c:163
int nb_ptses
Definition: mxfdec.c:190
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
Definition: mxfdec.c:734
unsigned matching_len
Definition: mxf.h:66
static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[]
Definition: mxfdec.c:968
Definition: mxf.h:53
uint64_t length
Definition: mxf.h:61
static const MXFCodecUL mxf_sound_essence_container_uls[]
Definition: mxfdec.c:974
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
static int mxf_parse_handle_essence(MXFContext *mxf)
Called when essence is encountered.
Definition: mxfdec.c:1919
#define IS_KLV_KEY(x, y)
Definition: mxfdec.c:253
struct AVAES * av_aes_alloc(void)
Allocate an AVAES context.
Definition: aes.c:47
static int64_t round_to_kag(int64_t position, int kag_size)
Definition: mxfdec.c:2004
enum AVCodecID codec_id
Definition: mov_chan.c:432
int track_id
Definition: mxfdec.c:122
UID package_uid
Definition: mxfdec.c:174
#define FFMAX(a, b)
Definition: common.h:55
int64_t essence_length
Definition: mxfdec.c:84
static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:620
int64_t duration
Definition: mxfdec.c:113
static int mxf_match_uid(const UID key, const UID uid, int len)
Definition: mxfdec.c:918
int packages_count
Definition: mxfdec.c:203
Only parse headers, do not repack.
Definition: avformat.h:654
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:454
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:718
int64_t index_byte_count
Definition: mxfdec.c:87
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:398
int ff_mxf_decode_pixel_layout(const char pixel_layout[16], enum AVPixelFormat *pix_fmt)
Definition: mxf.c:98
const MXFCodecUL ff_mxf_pixel_format_uls[]
Definition: mxf.c:62
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:397
Definition: hls.c:58
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:978
int nb_segments
Definition: mxfdec.c:193
int ff_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:3013
static const MXFCodecUL * mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
Definition: mxfdec.c:928
MXFPartition * partitions
Definition: mxfdec.c:199
static const uint8_t mxf_essence_element_key[]
Definition: mxfdec.c:242
static void * mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
Definition: mxfdec.c:938
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:117
static int mxf_read_utf16_string(AVIOContext *pb, int size, char **str)
Definition: mxfdec.c:1682
int local_tags_count
Definition: mxfdec.c:209
unsigned int horiz_subsampling
Definition: mxfdec.c:146
#define PRIxUID
Definition: mxf.h:82
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:116
static const uint8_t mxf_encrypted_triplet_key[]
Definition: mxfdec.c:248
#define FFMIN(a, b)
Definition: common.h:57
enum AVPixelFormat pix_fmt
Definition: mxfdec.c:153
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
UID uid
Definition: mxfdec.c:108
int64_t essence_offset
absolute offset of essence
Definition: mxfdec.c:83
int width
picture width / height.
Definition: avcodec.h:1229
static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:642
int edit_units_per_packet
how many edit units to read at a time (PCM, OPAtom)
Definition: mxfdec.c:222
int64_t last_forward_tell
Definition: mxfdec.c:217
static av_always_inline int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: avio.h:210
static const uint8_t mxf_header_partition_pack_key[]
Definition: mxfdec.c:241
int32_t
static int mxf_read_primer_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:400
Definition: mxfdec.c:66
AVDictionary * metadata
Definition: avformat.h:771
int64_t this_partition
Definition: mxfdec.c:82
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
Definition: mxfdec.c:337
static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
Definition: mxfdec.c:1768
static const char * mxf_data_essence_descriptor[]
Definition: mxfdec.c:989
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
Definition: mxfdec.c:294
enum AVPixelFormat pix_fmt
Definition: movenc.c:843
static void mxf_handle_small_eubc(AVFormatContext *s)
Deal with the case where for some audio atoms EditUnitByteCount is very small (2, 4...
Definition: mxfdec.c:2055
const MXFCodecUL ff_mxf_data_definition_uls[]
SMPTE RP224 http://www.smpte-ra.org/mdd/index.html.
Definition: mxf.c:28
UID * sub_descriptors_refs
Definition: mxfdec.c:148
static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:708
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:110
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:544
uint64_t index_duration
Definition: mxfdec.c:164
Stream structure.
Definition: avformat.h:699
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
int av_aes_init(AVAES *a, const uint8_t *key, int key_bits, int decrypt)
Initialize an AVAES context.
Definition: aes.c:196
NULL
Definition: eval.c:55
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
enum AVMediaType codec_type
Definition: avcodec.h:1058
enum AVCodecID codec_id
Definition: avcodec.h:1067
int sub_descriptors_count
Definition: mxfdec.c:149
int sample_rate
samples per second
Definition: avcodec.h:1807
int nb_index_tables
Definition: mxfdec.c:220
AVIOContext * pb
I/O context.
Definition: avformat.h:964
static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:833
static const uint8_t mxf_encrypted_essence_container[]
Definition: mxfdec.c:249
Definition: mxfdec.c:62
int samples_per_frame[6]
Definition: mxf.h:72
main external API structure.
Definition: avcodec.h:1050
int run_in
Definition: mxfdec.c:214
int extradata_size
Definition: avcodec.h:1165
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:68
static const MXFCodecUL mxf_data_essence_container_uls[]
Definition: mxfdec.c:984
AVRational aspect_ratio
Definition: mxfdec.c:136
int index
Definition: gxfenc.c:72
Definition: mxf.h:51
rational number numerator/denominator
Definition: rational.h:43
static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:421
MXFPartitionType type
Definition: mxfdec.c:78
static const uint8_t mxf_system_item_key[]
Definition: mxfdec.c:244
struct AVAES * aesc
Definition: mxfdec.c:207
AVFormatContext * fc
Definition: mxfdec.c:206
uint8_t * extradata
Definition: mxfdec.c:151
unsigned partitions_count
Definition: mxfdec.c:200
AVRational sample_rate
Definition: mxfdec.c:135
static int mxf_is_intra_only(MXFDescriptor *d)
Definition: mxfdec.c:1363
This structure contains the data a format has to probe a file.
Definition: avformat.h:395
Definition: mxf.h:64
uint8_t * local_tags
Definition: mxfdec.c:208
int channels
Definition: mxfdec.c:143
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:122
static int64_t klv_decode_ber_length(AVIOContext *pb)
Definition: mxfdec.c:255
MXFWrappingScheme
Definition: mxfdec.c:225
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:756
Definition: mxfdec.c:69
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:404
const uint8_t * key
Definition: avformat.h:1066
int parsing_backward
Definition: mxfdec.c:216
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
Definition: anm.c:76
full parsing and repack
Definition: avformat.h:653
Main libavformat public API header.
static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:602
int tracks_count
Definition: mxfdec.c:176
Definition: mxf.h:36
int body_sid
Definition: mxfdec.c:189
static const MXFCodecUL mxf_picture_essence_container_uls[]
Definition: mxfdec.c:953
int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen)
static int mxf_set_audio_pts(MXFContext *mxf, AVCodecContext *codec, AVPacket *pkt)
Definition: mxfdec.c:2322
int height
Definition: mxfdec.c:138
Definition: mxfdec.c:71
int64_t start_time
Decoding: pts of the first frame of the stream, in stream time base.
Definition: avformat.h:749
MXFMetadataReadFunc * read
Definition: mxfdec.c:235
Definition: mxfdec.c:64
Definition: mxfdec.c:70
int field_dominance
Definition: mxfdec.c:142
AVInputFormat ff_mxf_demuxer
Definition: mxfdec.c:2646
UID uid
Definition: mxfdec.c:172
int den
denominator
Definition: rational.h:45
AVIndexEntry * fake_index
Definition: mxfdec.c:195
int structural_components_count
Definition: mxfdec.c:112
UID data_definition_ul
Definition: mxfdec.c:110
enum MXFMetadataSetType type
Definition: mxfdec.c:183
static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:592
int body_sid
Definition: mxfdec.c:81
static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
Definition: mxfdec.c:1160
int current_klv_index
Definition: mxfdec.c:213
int eof_reached
true if eof reached
Definition: avio.h:96
int len
uint64_t * stream_offset_entries
Definition: mxfdec.c:167
int channels
number of audio channels
Definition: avcodec.h:1808
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
Definition: mxfdec.c:578
MXFOP op
Definition: mxfdec.c:201
void * priv_data
Format private data.
Definition: avformat.h:950
static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
Returns the end position of the essence container with given BodySID, or zero if unknown.
Definition: mxfdec.c:1091
int extradata_size
Definition: mxfdec.c:152
UID uid
Definition: mxfdec.c:118
uint64_t layout
static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
Definition: mxfdec.c:660
#define SET_STR_METADATA(pb, name, str)
Definition: mxfdec.c:1748
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:972
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:205
static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
Sets mxf->current_edit_unit based on what offset we're currently at.
Definition: mxfdec.c:2240
int bit_rate
Total stream bitrate in bit/s, 0 if not available.
Definition: avformat.h:1024
MXFMetadataSet ** metadata_sets
Definition: mxfdec.c:204
static int mxf_read_packet_old(AVFormatContext *s, AVPacket *pkt)
Definition: mxfdec.c:2340
static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
Definition: mxfdec.c:2280
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:1804
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:525
#define MXF_BFF
Definition: mxfdec.c:141
int avio_feof(AVIOContext *s)
Definition: aviobuf.c:260
MXFIndexTable * index_tables
Definition: mxfdec.c:221
UID uid
Definition: mxf.h:65
int pack_length
Definition: mxfdec.c:88
int stream_index
Definition: avcodec.h:975
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:741
#define MXF_TFF
Definition: mxfdec.c:140
Definition: aes.c:35
AVRational edit_rate
Definition: mxfdec.c:124
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:762
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
This structure stores compressed data.
Definition: avcodec.h:950
int index_sid
Definition: mxfdec.c:80
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205
Definition: mxf.h:31
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:966
for(j=16;j >0;--j)
Definition: mxfdec.c:56
uint64_t sample_count
Definition: mxfdec.c:126
MXFPartition * current_partition
Definition: mxfdec.c:215
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:228
uint64_t previous_partition
Definition: mxfdec.c:79
int64_t header_byte_count
Definition: mxfdec.c:86
UID descriptor_ref
Definition: mxfdec.c:178