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 > UINT_MAX / item_len)
411  return AVERROR_INVALIDDATA;
412  mxf->local_tags_count = item_num;
413  mxf->local_tags = av_malloc(item_num*item_len);
414  if (!mxf->local_tags)
415  return AVERROR(ENOMEM);
416  avio_read(pb, mxf->local_tags, item_num*item_len);
417  return 0;
418 }
419 
420 static int mxf_read_partition_pack(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
421 {
422  MXFContext *mxf = arg;
423  MXFPartition *partition;
424  UID op;
425  uint64_t footer_partition;
426  uint32_t nb_essence_containers;
427  int err;
428 
429  if ((err = av_reallocp_array(&mxf->partitions, mxf->partitions_count + 1,
430  sizeof(*mxf->partitions))) < 0) {
431  mxf->partitions_count = 0;
432  return err;
433  }
434 
435  if (mxf->parsing_backward) {
436  /* insert the new partition pack in the middle
437  * this makes the entries in mxf->partitions sorted by offset */
438  memmove(&mxf->partitions[mxf->last_forward_partition+1],
440  (mxf->partitions_count - mxf->last_forward_partition)*sizeof(*mxf->partitions));
441  partition = mxf->current_partition = &mxf->partitions[mxf->last_forward_partition];
442  } else {
443  mxf->last_forward_partition++;
444  partition = mxf->current_partition = &mxf->partitions[mxf->partitions_count];
445  }
446 
447  memset(partition, 0, sizeof(*partition));
448  mxf->partitions_count++;
449  partition->pack_length = avio_tell(pb) - klv_offset + size;
450 
451  switch(uid[13]) {
452  case 2:
453  partition->type = Header;
454  break;
455  case 3:
456  partition->type = BodyPartition;
457  break;
458  case 4:
459  partition->type = Footer;
460  break;
461  default:
462  av_log(mxf->fc, AV_LOG_ERROR, "unknown partition type %i\n", uid[13]);
463  return AVERROR_INVALIDDATA;
464  }
465 
466  /* consider both footers to be closed (there is only Footer and CompleteFooter) */
467  partition->closed = partition->type == Footer || !(uid[14] & 1);
468  partition->complete = uid[14] > 2;
469  avio_skip(pb, 4);
470  partition->kag_size = avio_rb32(pb);
471  partition->this_partition = avio_rb64(pb);
472  partition->previous_partition = avio_rb64(pb);
473  footer_partition = avio_rb64(pb);
474  partition->header_byte_count = avio_rb64(pb);
475  partition->index_byte_count = avio_rb64(pb);
476  partition->index_sid = avio_rb32(pb);
477  avio_skip(pb, 8);
478  partition->body_sid = avio_rb32(pb);
479  avio_read(pb, op, sizeof(UID));
480  nb_essence_containers = avio_rb32(pb);
481 
482  if (partition->this_partition &&
483  partition->previous_partition == partition->this_partition) {
484  av_log(mxf->fc, AV_LOG_ERROR,
485  "PreviousPartition equal to ThisPartition %"PRIx64"\n",
486  partition->previous_partition);
487  /* override with the actual previous partition offset */
488  if (!mxf->parsing_backward && mxf->last_forward_partition > 1) {
489  MXFPartition *prev =
490  mxf->partitions + mxf->last_forward_partition - 2;
491  partition->previous_partition = prev->this_partition;
492  }
493  /* if no previous body partition are found point to the header
494  * partition */
495  if (partition->previous_partition == partition->this_partition)
496  partition->previous_partition = 0;
497  av_log(mxf->fc, AV_LOG_ERROR,
498  "Overriding PreviousPartition with %"PRIx64"\n",
499  partition->previous_partition);
500  }
501 
502  /* some files don'thave FooterPartition set in every partition */
503  if (footer_partition) {
504  if (mxf->footer_partition && mxf->footer_partition != footer_partition) {
505  av_log(mxf->fc, AV_LOG_ERROR,
506  "inconsistent FooterPartition value: %"PRIu64" != %"PRIu64"\n",
507  mxf->footer_partition, footer_partition);
508  } else {
509  mxf->footer_partition = footer_partition;
510  }
511  }
512 
513  av_dlog(mxf->fc,
514  "PartitionPack: ThisPartition = 0x%"PRIX64
515  ", PreviousPartition = 0x%"PRIX64", "
516  "FooterPartition = 0x%"PRIX64", IndexSID = %i, BodySID = %i\n",
517  partition->this_partition,
518  partition->previous_partition, footer_partition,
519  partition->index_sid, partition->body_sid);
520 
521  /* sanity check PreviousPartition if set */
522  if (partition->previous_partition &&
523  mxf->run_in + partition->previous_partition >= klv_offset) {
524  av_log(mxf->fc, AV_LOG_ERROR,
525  "PreviousPartition points to this partition or forward\n");
526  return AVERROR_INVALIDDATA;
527  }
528 
529  if (op[12] == 1 && op[13] == 1) mxf->op = OP1a;
530  else if (op[12] == 1 && op[13] == 2) mxf->op = OP1b;
531  else if (op[12] == 1 && op[13] == 3) mxf->op = OP1c;
532  else if (op[12] == 2 && op[13] == 1) mxf->op = OP2a;
533  else if (op[12] == 2 && op[13] == 2) mxf->op = OP2b;
534  else if (op[12] == 2 && op[13] == 3) mxf->op = OP2c;
535  else if (op[12] == 3 && op[13] == 1) mxf->op = OP3a;
536  else if (op[12] == 3 && op[13] == 2) mxf->op = OP3b;
537  else if (op[12] == 3 && op[13] == 3) mxf->op = OP3c;
538  else if (op[12] == 64&& op[13] == 1) mxf->op = OPSonyOpt;
539  else if (op[12] == 0x10) {
540  /* SMPTE 390m: "There shall be exactly one essence container"
541  * The following block deals with files that violate this, namely:
542  * 2011_DCPTEST_24FPS.V.mxf - two ECs, OP1a
543  * abcdefghiv016f56415e.mxf - zero ECs, OPAtom, output by Avid AirSpeed */
544  if (nb_essence_containers != 1) {
545  MXFOP op = nb_essence_containers ? OP1a : OPAtom;
546 
547  /* only nag once */
548  if (!mxf->op)
549  av_log(mxf->fc, AV_LOG_WARNING,
550  "\"OPAtom\" with %"PRIu32" ECs - assuming %s\n",
551  nb_essence_containers,
552  op == OP1a ? "OP1a" : "OPAtom");
553 
554  mxf->op = op;
555  } else
556  mxf->op = OPAtom;
557  } else {
558  av_log(mxf->fc, AV_LOG_ERROR, "unknown operational pattern: %02xh %02xh - guessing OP1a\n", op[12], op[13]);
559  mxf->op = OP1a;
560  }
561 
562  if (partition->kag_size <= 0 || partition->kag_size > (1 << 20)) {
563  av_log(mxf->fc, AV_LOG_WARNING, "invalid KAGSize %"PRId32" - guessing ",
564  partition->kag_size);
565 
566  if (mxf->op == OPSonyOpt)
567  partition->kag_size = 512;
568  else
569  partition->kag_size = 1;
570 
571  av_log(mxf->fc, AV_LOG_WARNING, "%"PRId32"\n", partition->kag_size);
572  }
573 
574  return 0;
575 }
576 
577 static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
578 {
579  int err;
580 
581  if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
582  sizeof(*mxf->metadata_sets))) < 0) {
583  mxf->metadata_sets_count = 0;
584  return err;
585  }
586  mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
587  mxf->metadata_sets_count++;
588  return 0;
589 }
590 
591 static int mxf_read_cryptographic_context(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
592 {
593  MXFCryptoContext *cryptocontext = arg;
594  if (size != 16)
595  return AVERROR_INVALIDDATA;
597  avio_read(pb, cryptocontext->source_container_ul, 16);
598  return 0;
599 }
600 
601 static int mxf_read_content_storage(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
602 {
603  MXFContext *mxf = arg;
604  switch (tag) {
605  case 0x1901:
606  mxf->packages_count = avio_rb32(pb);
607  if (mxf->packages_count >= UINT_MAX / sizeof(UID))
608  return AVERROR_INVALIDDATA;
609  mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
610  if (!mxf->packages_refs)
611  return AVERROR(ENOMEM);
612  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
613  avio_read(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
614  break;
615  }
616  return 0;
617 }
618 
619 static int mxf_read_source_clip(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
620 {
621  MXFStructuralComponent *source_clip = arg;
622  switch(tag) {
623  case 0x0202:
624  source_clip->duration = avio_rb64(pb);
625  break;
626  case 0x1201:
627  source_clip->start_position = avio_rb64(pb);
628  break;
629  case 0x1101:
630  /* UMID, only get last 16 bytes */
631  avio_skip(pb, 16);
632  avio_read(pb, source_clip->source_package_uid, 16);
633  break;
634  case 0x1102:
635  source_clip->source_track_id = avio_rb32(pb);
636  break;
637  }
638  return 0;
639 }
640 
641 static int mxf_read_material_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
642 {
643  MXFPackage *package = arg;
644  switch(tag) {
645  case 0x4403:
646  package->tracks_count = avio_rb32(pb);
647  if (package->tracks_count >= UINT_MAX / sizeof(UID))
648  return AVERROR_INVALIDDATA;
649  package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
650  if (!package->tracks_refs)
651  return AVERROR(ENOMEM);
652  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
653  avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
654  break;
655  }
656  return 0;
657 }
658 
659 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
660 {
661  MXFTrack *track = arg;
662  switch(tag) {
663  case 0x4801:
664  track->track_id = avio_rb32(pb);
665  break;
666  case 0x4804:
667  avio_read(pb, track->track_number, 4);
668  break;
669  case 0x4b01:
670  track->edit_rate.num = avio_rb32(pb);
671  track->edit_rate.den = avio_rb32(pb);
672  break;
673  case 0x4803:
674  avio_read(pb, track->sequence_ref, 16);
675  break;
676  }
677  return 0;
678 }
679 
680 static int mxf_read_sequence(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
681 {
682  MXFSequence *sequence = arg;
683  switch(tag) {
684  case 0x0202:
685  sequence->duration = avio_rb64(pb);
686  break;
687  case 0x0201:
688  avio_read(pb, sequence->data_definition_ul, 16);
689  break;
690  case 0x4b02:
691  sequence->origin = avio_r8(pb);
692  break;
693  case 0x1001:
694  sequence->structural_components_count = avio_rb32(pb);
695  if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
696  return AVERROR_INVALIDDATA;
697  sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
698  if (!sequence->structural_components_refs)
699  return AVERROR(ENOMEM);
700  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
701  avio_read(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
702  break;
703  }
704  return 0;
705 }
706 
707 static int mxf_read_source_package(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
708 {
709  MXFPackage *package = arg;
710  switch(tag) {
711  case 0x4403:
712  package->tracks_count = avio_rb32(pb);
713  if (package->tracks_count >= UINT_MAX / sizeof(UID))
714  return AVERROR_INVALIDDATA;
715  package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
716  if (!package->tracks_refs)
717  return AVERROR(ENOMEM);
718  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
719  avio_read(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
720  break;
721  case 0x4401:
722  /* UMID, only get last 16 bytes */
723  avio_skip(pb, 16);
724  avio_read(pb, package->package_uid, 16);
725  break;
726  case 0x4701:
727  avio_read(pb, package->descriptor_ref, 16);
728  break;
729  }
730  return 0;
731 }
732 
734 {
735  int i, length;
736 
737  segment->nb_index_entries = avio_rb32(pb);
738  if (!segment->nb_index_entries)
739  return 0;
740  else if (segment->nb_index_entries < 0 ||
741  segment->nb_index_entries >
742  (INT_MAX / sizeof(*segment->stream_offset_entries)))
743  return AVERROR(ENOMEM);
744 
745  length = avio_rb32(pb);
746  if(segment->nb_index_entries && length < 11)
747  return AVERROR_INVALIDDATA;
748 
750  sizeof(*segment->temporal_offset_entries));
751  segment->flag_entries = av_mallocz(segment->nb_index_entries *
752  sizeof(*segment->flag_entries));
754  sizeof(*segment->stream_offset_entries));
755 
756  if (!segment->flag_entries || !segment->stream_offset_entries ||
757  !segment->temporal_offset_entries) {
758  av_freep(&segment->flag_entries);
759  av_freep(&segment->stream_offset_entries);
761  return AVERROR(ENOMEM);
762  }
763 
764  for (i = 0; i < segment->nb_index_entries; i++) {
765  if(avio_feof(pb))
766  return AVERROR_INVALIDDATA;
767  segment->temporal_offset_entries[i] = avio_r8(pb);
768  avio_r8(pb); /* KeyFrameOffset */
769  segment->flag_entries[i] = avio_r8(pb);
770  segment->stream_offset_entries[i] = avio_rb64(pb);
771  avio_skip(pb, length - 11);
772  }
773  return 0;
774 }
775 
776 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
777 {
779  switch(tag) {
780  case 0x3F05:
781  segment->edit_unit_byte_count = avio_rb32(pb);
782  av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
783  break;
784  case 0x3F06:
785  segment->index_sid = avio_rb32(pb);
786  av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
787  break;
788  case 0x3F07:
789  segment->body_sid = avio_rb32(pb);
790  av_dlog(NULL, "BodySID %d\n", segment->body_sid);
791  break;
792  case 0x3F0A:
793  av_dlog(NULL, "IndexEntryArray found\n");
794  return mxf_read_index_entry_array(pb, segment);
795  case 0x3F0B:
796  segment->index_edit_rate.num = avio_rb32(pb);
797  segment->index_edit_rate.den = avio_rb32(pb);
798  av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
799  segment->index_edit_rate.den);
800  break;
801  case 0x3F0C:
802  segment->index_start_position = avio_rb64(pb);
803  av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
804  break;
805  case 0x3F0D:
806  segment->index_duration = avio_rb64(pb);
807  av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
808  break;
809  }
810  return 0;
811 }
812 
813 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
814 {
815  int code, value, ofs = 0;
816  char layout[16] = {0};
817 
818  do {
819  code = avio_r8(pb);
820  value = avio_r8(pb);
821  av_dlog(NULL, "pixel layout: code %#x\n", code);
822 
823  if (ofs < 16) {
824  layout[ofs++] = code;
825  layout[ofs++] = value;
826  }
827  } while (code != 0); /* SMPTE 377M E.2.46 */
828 
829  ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
830 }
831 
832 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
833 {
834  MXFDescriptor *descriptor = arg;
835  descriptor->pix_fmt = AV_PIX_FMT_NONE;
836  switch(tag) {
837  case 0x3F01:
838  descriptor->sub_descriptors_count = avio_rb32(pb);
839  if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
840  return AVERROR_INVALIDDATA;
841  descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
842  if (!descriptor->sub_descriptors_refs)
843  return AVERROR(ENOMEM);
844  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
845  avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
846  break;
847  case 0x3004:
848  avio_read(pb, descriptor->essence_container_ul, 16);
849  break;
850  case 0x3006:
851  descriptor->linked_track_id = avio_rb32(pb);
852  break;
853  case 0x3201: /* PictureEssenceCoding */
854  avio_read(pb, descriptor->essence_codec_ul, 16);
855  break;
856  case 0x3203:
857  descriptor->width = avio_rb32(pb);
858  break;
859  case 0x3202:
860  descriptor->height = avio_rb32(pb);
861  break;
862  case 0x320C:
863  descriptor->frame_layout = avio_r8(pb);
864  break;
865  case 0x320E:
866  descriptor->aspect_ratio.num = avio_rb32(pb);
867  descriptor->aspect_ratio.den = avio_rb32(pb);
868  break;
869  case 0x3212:
870  descriptor->field_dominance = avio_r8(pb);
871  break;
872  case 0x3301:
873  descriptor->component_depth = avio_rb32(pb);
874  break;
875  case 0x3302:
876  descriptor->horiz_subsampling = avio_rb32(pb);
877  break;
878  case 0x3308:
879  descriptor->vert_subsampling = avio_rb32(pb);
880  break;
881  case 0x3D03:
882  descriptor->sample_rate.num = avio_rb32(pb);
883  descriptor->sample_rate.den = avio_rb32(pb);
884  break;
885  case 0x3D06: /* SoundEssenceCompression */
886  avio_read(pb, descriptor->essence_codec_ul, 16);
887  break;
888  case 0x3D07:
889  descriptor->channels = avio_rb32(pb);
890  break;
891  case 0x3D01:
892  descriptor->bits_per_sample = avio_rb32(pb);
893  break;
894  case 0x3401:
895  mxf_read_pixel_layout(pb, descriptor);
896  break;
897  default:
898  /* Private uid used by SONY C0023S01.mxf */
900  av_free(descriptor->extradata);
901  descriptor->extradata_size = 0;
902  descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
903  if (!descriptor->extradata)
904  return AVERROR(ENOMEM);
905  descriptor->extradata_size = size;
906  avio_read(pb, descriptor->extradata, size);
907  }
908  break;
909  }
910  return 0;
911 }
912 
913 /*
914  * Match an uid independently of the version byte and up to len common bytes
915  * Returns: boolean
916  */
917 static int mxf_match_uid(const UID key, const UID uid, int len)
918 {
919  int i;
920  for (i = 0; i < len; i++) {
921  if (i != 7 && key[i] != uid[i])
922  return 0;
923  }
924  return 1;
925 }
926 
927 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
928 {
929  while (uls->uid[0]) {
930  if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
931  break;
932  uls++;
933  }
934  return uls;
935 }
936 
937 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
938 {
939  int i;
940 
941  if (!strong_ref)
942  return NULL;
943  for (i = 0; i < mxf->metadata_sets_count; i++) {
944  if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
945  (type == AnyType || mxf->metadata_sets[i]->type == type)) {
946  return mxf->metadata_sets[i];
947  }
948  }
949  return NULL;
950 }
951 
953  // video essence container uls
954  { { 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 */
955  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
956  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
957  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
958 };
959 
960 /* EC ULs for intra-only formats */
962  { { 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 */
963  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
964 };
965 
966 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
968  { { 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 */
969  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
970  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
971 };
972 
974  // sound essence container uls
975  { { 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 */
976  { { 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 */
977  { { 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 */
978  { { 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 */
979  { { 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) */
980  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
981 };
982 
984  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
985  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, AV_CODEC_ID_NONE },
986 };
987 
988 static const char* mxf_data_essence_descriptor[] = {
989  "vbi_vanc_smpte_436M",
990 };
991 
992 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
993 {
994  int i, j, nb_segments = 0;
995  MXFIndexTableSegment **unsorted_segments;
996  int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
997 
998  /* count number of segments, allocate arrays and copy unsorted segments */
999  for (i = 0; i < mxf->metadata_sets_count; i++)
1000  if (mxf->metadata_sets[i]->type == IndexTableSegment)
1001  nb_segments++;
1002 
1003  if (!nb_segments)
1004  return AVERROR_INVALIDDATA;
1005 
1006  *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
1007  unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
1008  if (!*sorted_segments || !unsorted_segments) {
1009  av_freep(sorted_segments);
1010  av_free(unsorted_segments);
1011  return AVERROR(ENOMEM);
1012  }
1013 
1014  for (i = j = 0; i < mxf->metadata_sets_count; i++)
1015  if (mxf->metadata_sets[i]->type == IndexTableSegment)
1016  unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1017 
1018  *nb_sorted_segments = 0;
1019 
1020  /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1021  for (i = 0; i < nb_segments; i++) {
1022  int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1023  uint64_t best_index_duration = 0;
1024 
1025  for (j = 0; j < nb_segments; j++) {
1026  MXFIndexTableSegment *s = unsorted_segments[j];
1027 
1028  /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1029  * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1030  * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1031  */
1032  if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1033  (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1034  (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1035  best = j;
1036  best_body_sid = s->body_sid;
1037  best_index_sid = s->index_sid;
1038  best_index_start = s->index_start_position;
1039  best_index_duration = s->index_duration;
1040  }
1041  }
1042 
1043  /* no suitable entry found -> we're done */
1044  if (best == -1)
1045  break;
1046 
1047  (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1048  last_body_sid = best_body_sid;
1049  last_index_sid = best_index_sid;
1050  last_index_start = best_index_start;
1051  }
1052 
1053  av_free(unsorted_segments);
1054 
1055  return 0;
1056 }
1057 
1061 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1062 {
1063  int x;
1064  int64_t offset_in = offset; /* for logging */
1065 
1066  for (x = 0; x < mxf->partitions_count; x++) {
1067  MXFPartition *p = &mxf->partitions[x];
1068 
1069  if (p->body_sid != body_sid)
1070  continue;
1071 
1072  if (offset < p->essence_length || !p->essence_length) {
1073  *offset_out = p->essence_offset + offset;
1074  return 0;
1075  }
1076 
1077  offset -= p->essence_length;
1078  }
1079 
1080  av_log(mxf->fc, AV_LOG_ERROR,
1081  "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1082  offset_in, body_sid);
1083 
1084  return AVERROR_INVALIDDATA;
1085 }
1086 
1090 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1091 {
1092  int x;
1093  int64_t ret = 0;
1094 
1095  for (x = 0; x < mxf->partitions_count; x++) {
1096  MXFPartition *p = &mxf->partitions[x];
1097 
1098  if (p->body_sid != body_sid)
1099  continue;
1100 
1101  if (!p->essence_length)
1102  return 0;
1103 
1104  ret = p->essence_offset + p->essence_length;
1105  }
1106 
1107  return ret;
1108 }
1109 
1110 /* EditUnit -> absolute offset */
1111 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)
1112 {
1113  int i;
1114  int64_t offset_temp = 0;
1115 
1116  for (i = 0; i < index_table->nb_segments; i++) {
1117  MXFIndexTableSegment *s = index_table->segments[i];
1118 
1119  edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1120 
1121  if (edit_unit < s->index_start_position + s->index_duration) {
1122  int64_t index = edit_unit - s->index_start_position;
1123 
1124  if (s->edit_unit_byte_count)
1125  offset_temp += s->edit_unit_byte_count * index;
1126  else if (s->nb_index_entries) {
1127  if (s->nb_index_entries == 2 * s->index_duration + 1)
1128  index *= 2; /* Avid index */
1129 
1130  if (index < 0 || index >= s->nb_index_entries) {
1131  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1132  index_table->index_sid, s->index_start_position);
1133  return AVERROR_INVALIDDATA;
1134  }
1135 
1136  offset_temp = s->stream_offset_entries[index];
1137  } else {
1138  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1139  index_table->index_sid, s->index_start_position);
1140  return AVERROR_INVALIDDATA;
1141  }
1142 
1143  if (edit_unit_out)
1144  *edit_unit_out = edit_unit;
1145 
1146  return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1147  } else {
1148  /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1149  offset_temp += s->edit_unit_byte_count * s->index_duration;
1150  }
1151  }
1152 
1153  if (nag)
1154  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);
1155 
1156  return AVERROR_INVALIDDATA;
1157 }
1158 
1160 {
1161  int i, j, x;
1162  int8_t max_temporal_offset = -128;
1163 
1164  /* first compute how many entries we have */
1165  for (i = 0; i < index_table->nb_segments; i++) {
1166  MXFIndexTableSegment *s = index_table->segments[i];
1167 
1168  if (!s->nb_index_entries) {
1169  index_table->nb_ptses = 0;
1170  return 0; /* no TemporalOffsets */
1171  }
1172 
1173  index_table->nb_ptses += s->index_duration;
1174  }
1175 
1176  /* paranoid check */
1177  if (index_table->nb_ptses <= 0)
1178  return 0;
1179 
1180  if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1181  return AVERROR(ENOMEM);
1182 
1183  index_table->ptses = av_mallocz(index_table->nb_ptses *
1184  sizeof(int64_t));
1185  index_table->fake_index = av_mallocz(index_table->nb_ptses *
1186  sizeof(AVIndexEntry));
1187  if (!index_table->ptses || !index_table->fake_index) {
1188  av_freep(&index_table->ptses);
1189  return AVERROR(ENOMEM);
1190  }
1191 
1192  /* we may have a few bad TemporalOffsets
1193  * make sure the corresponding PTSes don't have the bogus value 0 */
1194  for (x = 0; x < index_table->nb_ptses; x++)
1195  index_table->ptses[x] = AV_NOPTS_VALUE;
1196 
1224  for (i = x = 0; i < index_table->nb_segments; i++) {
1225  MXFIndexTableSegment *s = index_table->segments[i];
1226  int index_delta = 1;
1227  int n = s->nb_index_entries;
1228 
1229  if (s->nb_index_entries == 2 * s->index_duration + 1) {
1230  index_delta = 2; /* Avid index */
1231  /* ignore the last entry - it's the size of the essence container */
1232  n--;
1233  }
1234 
1235  for (j = 0; j < n; j += index_delta, x++) {
1236  int offset = s->temporal_offset_entries[j] / index_delta;
1237  int index = x + offset;
1238 
1239  if (x >= index_table->nb_ptses) {
1240  av_log(mxf->fc, AV_LOG_ERROR,
1241  "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1243  break;
1244  }
1245 
1246  index_table->fake_index[x].timestamp = x;
1247  index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1248 
1249  if (index < 0 || index >= index_table->nb_ptses) {
1250  av_log(mxf->fc, AV_LOG_ERROR,
1251  "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1252  x, offset, index);
1253  continue;
1254  }
1255 
1256  index_table->ptses[index] = x;
1257  max_temporal_offset = FFMAX(max_temporal_offset, offset);
1258  }
1259  }
1260 
1261  index_table->first_dts = -max_temporal_offset;
1262 
1263  return 0;
1264 }
1265 
1271 {
1272  int i, j, k, ret, nb_sorted_segments;
1273  MXFIndexTableSegment **sorted_segments = NULL;
1274 
1275  if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1276  nb_sorted_segments <= 0) {
1277  av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1278  return 0;
1279  }
1280 
1281  /* sanity check and count unique BodySIDs/IndexSIDs */
1282  for (i = 0; i < nb_sorted_segments; i++) {
1283  if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1284  mxf->nb_index_tables++;
1285  else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1286  av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1287  ret = AVERROR_INVALIDDATA;
1288  goto finish_decoding_index;
1289  }
1290  }
1291 
1293  sizeof(*mxf->index_tables));
1294  if (!mxf->index_tables) {
1295  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1296  ret = AVERROR(ENOMEM);
1297  goto finish_decoding_index;
1298  }
1299 
1300  /* distribute sorted segments to index tables */
1301  for (i = j = 0; i < nb_sorted_segments; i++) {
1302  if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1303  /* next IndexSID */
1304  j++;
1305  }
1306 
1307  mxf->index_tables[j].nb_segments++;
1308  }
1309 
1310  for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1311  MXFIndexTable *t = &mxf->index_tables[j];
1312 
1314  sizeof(*t->segments));
1315 
1316  if (!t->segments) {
1317  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1318  " pointer array\n");
1319  ret = AVERROR(ENOMEM);
1320  goto finish_decoding_index;
1321  }
1322 
1323  if (sorted_segments[i]->index_start_position)
1324  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1325  sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1326 
1327  memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1328  t->index_sid = sorted_segments[i]->index_sid;
1329  t->body_sid = sorted_segments[i]->body_sid;
1330 
1331  if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1332  goto finish_decoding_index;
1333 
1334  /* fix zero IndexDurations */
1335  for (k = 0; k < t->nb_segments; k++) {
1336  if (t->segments[k]->index_duration)
1337  continue;
1338 
1339  if (t->nb_segments > 1)
1340  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1341  t->index_sid, k);
1342 
1343  if (mxf->fc->nb_streams <= 0) {
1344  av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1345  break;
1346  }
1347 
1348  /* assume the first stream's duration is reasonable
1349  * leave index_duration = 0 on further segments in case we have any (unlikely)
1350  */
1351  t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1352  break;
1353  }
1354  }
1355 
1356  ret = 0;
1357 finish_decoding_index:
1358  av_free(sorted_segments);
1359  return ret;
1360 }
1361 
1363 {
1364  return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1366  mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1368 }
1369 
1371 {
1372  MXFPackage *material_package = NULL;
1373  MXFPackage *temp_package = NULL;
1374  int i, j, k, ret;
1375 
1376  av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1377  /* TODO: handle multiple material packages (OP3x) */
1378  for (i = 0; i < mxf->packages_count; i++) {
1379  material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1380  if (material_package) break;
1381  }
1382  if (!material_package) {
1383  av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1384  return AVERROR_INVALIDDATA;
1385  }
1386 
1387  for (i = 0; i < material_package->tracks_count; i++) {
1388  MXFPackage *source_package = NULL;
1389  MXFTrack *material_track = NULL;
1390  MXFTrack *source_track = NULL;
1391  MXFTrack *temp_track = NULL;
1392  MXFDescriptor *descriptor = NULL;
1393  MXFStructuralComponent *component = NULL;
1394  UID *essence_container_ul = NULL;
1395  const MXFCodecUL *codec_ul = NULL;
1396  const MXFCodecUL *container_ul = NULL;
1397  const MXFCodecUL *pix_fmt_ul = NULL;
1398  AVStream *st;
1399 
1400  if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1401  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1402  continue;
1403  }
1404 
1405  if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1406  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1407  continue;
1408  }
1409 
1410  /* TODO: handle multiple source clips */
1411  for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1412  /* TODO: handle timecode component */
1413  component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1414  if (!component)
1415  continue;
1416 
1417  for (k = 0; k < mxf->packages_count; k++) {
1418  temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1419  if (!temp_package)
1420  continue;
1421  if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1422  source_package = temp_package;
1423  break;
1424  }
1425  }
1426  if (!source_package) {
1427  av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1428  break;
1429  }
1430  for (k = 0; k < source_package->tracks_count; k++) {
1431  if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1432  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1433  ret = AVERROR_INVALIDDATA;
1434  goto fail_and_free;
1435  }
1436  if (temp_track->track_id == component->source_track_id) {
1437  source_track = temp_track;
1438  break;
1439  }
1440  }
1441  if (!source_track) {
1442  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1443  break;
1444  }
1445  }
1446  if (!source_track || !component)
1447  continue;
1448 
1449  if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1450  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1451  ret = AVERROR_INVALIDDATA;
1452  goto fail_and_free;
1453  }
1454 
1455  /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1456  * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1457  if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1458  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1459  continue;
1460  }
1461 
1462  st = avformat_new_stream(mxf->fc, NULL);
1463  if (!st) {
1464  av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1465  ret = AVERROR(ENOMEM);
1466  goto fail_and_free;
1467  }
1468  st->id = source_track->track_id;
1469  st->priv_data = source_track;
1470  source_track->original_duration = st->duration = component->duration;
1471  if (st->duration == -1)
1472  st->duration = AV_NOPTS_VALUE;
1473  st->start_time = component->start_position;
1474  if (material_track->edit_rate.num <= 0 ||
1475  material_track->edit_rate.den <= 0) {
1476  av_log(mxf->fc, AV_LOG_WARNING,
1477  "Invalid edit rate (%d/%d) found on stream #%d, "
1478  "defaulting to 25/1\n",
1479  material_track->edit_rate.num,
1480  material_track->edit_rate.den, st->index);
1481  material_track->edit_rate = (AVRational){25, 1};
1482  }
1483  avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1484 
1485  /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1486  * the former is accessible via st->priv_data */
1487  source_track->edit_rate = material_track->edit_rate;
1488 
1489  PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1491  st->codec->codec_type = codec_ul->id;
1492 
1493  source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1494  if (source_package->descriptor) {
1495  if (source_package->descriptor->type == MultipleDescriptor) {
1496  for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1497  MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1498 
1499  if (!sub_descriptor) {
1500  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1501  continue;
1502  }
1503  if (sub_descriptor->linked_track_id == source_track->track_id) {
1504  descriptor = sub_descriptor;
1505  break;
1506  }
1507  }
1508  } else if (source_package->descriptor->type == Descriptor)
1509  descriptor = source_package->descriptor;
1510  }
1511  if (!descriptor) {
1512  av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1513  continue;
1514  }
1515  PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1516  PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1517  essence_container_ul = &descriptor->essence_container_ul;
1518  /* HACK: replacing the original key with mxf_encrypted_essence_container
1519  * is not allowed according to s429-6, try to find correct information anyway */
1520  if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1521  av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1522  for (k = 0; k < mxf->metadata_sets_count; k++) {
1523  MXFMetadataSet *metadata = mxf->metadata_sets[k];
1524  if (metadata->type == CryptoContext) {
1525  essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1526  break;
1527  }
1528  }
1529  }
1530 
1531  /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1532  codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1533  st->codec->codec_id = codec_ul->id;
1534 
1535  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1536  source_track->intra_only = mxf_is_intra_only(descriptor);
1537  container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1538  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1539  st->codec->codec_id = container_ul->id;
1540  st->codec->width = descriptor->width;
1541  /* Field height, not frame height */
1542  st->codec->height = descriptor->height;
1543  switch (descriptor->frame_layout) {
1544  case SegmentedFrame:
1545  /* This one is a weird layout I don't fully understand. */
1546  av_log(mxf->fc, AV_LOG_INFO,
1547  "SegmentedFrame layout isn't currently supported\n");
1548  break;
1549  case FullFrame:
1551  break;
1552  case OneField:
1553  /* Every other line is stored and needs to be duplicated. */
1554  av_log(mxf->fc, AV_LOG_INFO,
1555  "OneField frame layout isn't currently supported\n");
1556  break;
1557  /* The correct thing to do here is fall through, but by
1558  * breaking we might be able to decode some streams at half
1559  * the vertical resolution, rather than not al all.
1560  * It's also for compatibility with the old behavior. */
1561  case SeparateFields:
1562  case MixedFields:
1563  switch (descriptor->field_dominance) {
1564  case MXF_TFF:
1565  st->codec->field_order = AV_FIELD_TT;
1566  break;
1567  case MXF_BFF:
1568  st->codec->field_order = AV_FIELD_BB;
1569  break;
1570  default:
1572  "Field dominance %d support",
1573  descriptor->field_dominance);
1574  break;
1575  }
1576  /* Turn field height into frame height. */
1577  st->codec->height *= 2;
1578  break;
1579  default:
1580  av_log(mxf->fc, AV_LOG_INFO,
1581  "Unknown frame layout type: %d\n",
1582  descriptor->frame_layout);
1583  }
1584  if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1585  st->codec->pix_fmt = descriptor->pix_fmt;
1586  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1588  &descriptor->essence_codec_ul);
1589  st->codec->pix_fmt = pix_fmt_ul->id;
1590  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1591  /* support files created before RP224v10 by defaulting to UYVY422
1592  if subsampling is 4:2:2 and component depth is 8-bit */
1593  if (descriptor->horiz_subsampling == 2 &&
1594  descriptor->vert_subsampling == 1 &&
1595  descriptor->component_depth == 8) {
1597  }
1598  }
1599  }
1600  }
1602  if (material_track->sequence->origin) {
1603  char material_origin[3];
1604  snprintf(material_origin, sizeof(material_origin), "%d", material_track->sequence->origin);
1605  av_dict_set(&st->metadata, "material_track_origin", material_origin, 0);
1606  }
1607  if (source_track->sequence->origin) {
1608  char source_origin[3];
1609  snprintf(source_origin, sizeof(source_origin), "%d", source_track->sequence->origin);
1610  av_dict_set(&st->metadata, "source_track_origin", source_origin, 0);
1611  }
1612  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1613  container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1614  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1615  st->codec->codec_id = container_ul->id;
1616  st->codec->channels = descriptor->channels;
1617  st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1618 
1619  if (descriptor->sample_rate.den > 0) {
1620  st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1621  avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1622  } else {
1623  av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1624  "found for stream #%d, time base forced to 1/48000\n",
1625  descriptor->sample_rate.num, descriptor->sample_rate.den,
1626  st->index);
1627  avpriv_set_pts_info(st, 64, 1, 48000);
1628  }
1629 
1630  /* if duration is set, rescale it from EditRate to SampleRate */
1631  if (st->duration != AV_NOPTS_VALUE)
1632  st->duration = av_rescale_q(st->duration,
1633  av_inv_q(material_track->edit_rate),
1634  st->time_base);
1635 
1636  /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1637  if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1638  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1640  else if (descriptor->bits_per_sample == 32)
1642  } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1643  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1645  else if (descriptor->bits_per_sample == 32)
1647  } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1649  }
1650  } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1651  int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
1652  essence_container_ul)->id;
1653  if (codec_id >= 0 &&
1654  codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
1655  av_dict_set(&st->metadata, "data_type",
1656  mxf_data_essence_descriptor[codec_id], 0);
1657  }
1658  }
1659  if (descriptor->extradata) {
1661  if (st->codec->extradata) {
1662  memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1663  st->codec->extradata_size = descriptor->extradata_size;
1664  }
1665  } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1666  ret = ff_generate_avci_extradata(st);
1667  if (ret < 0)
1668  return ret;
1669  }
1670  if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1671  /* TODO: decode timestamps */
1673  }
1674  }
1675 
1676  ret = 0;
1677 fail_and_free:
1678  return ret;
1679 }
1680 
1681 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1682 {
1683  int ret;
1684  size_t buf_size;
1685 
1686  if (size < 0)
1687  return AVERROR(EINVAL);
1688 
1689  buf_size = size + size / 2 + 1;
1690  *str = av_malloc(buf_size);
1691  if (!*str)
1692  return AVERROR(ENOMEM);
1693 
1694  if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1695  av_freep(str);
1696  return ret;
1697  }
1698 
1699  return ret;
1700 }
1701 
1702 static int mxf_uid_to_str(UID uid, char **str)
1703 {
1704  int i;
1705  char *p;
1706  p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1707  if (!p)
1708  return AVERROR(ENOMEM);
1709  for (i = 0; i < sizeof(UID); i++) {
1710  snprintf(p, 2 + 1, "%.2x", uid[i]);
1711  p += 2;
1712  if (i == 3 || i == 5 || i == 7 || i == 9) {
1713  snprintf(p, 1 + 1, "-");
1714  p++;
1715  }
1716  }
1717  return 0;
1718 }
1719 
1720 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1721 {
1722  struct tm time = { 0 };
1723  time.tm_year = (timestamp >> 48) - 1900;
1724  time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1725  time.tm_mday = (timestamp >> 32 & 0xFF);
1726  time.tm_hour = (timestamp >> 24 & 0xFF);
1727  time.tm_min = (timestamp >> 16 & 0xFF);
1728  time.tm_sec = (timestamp >> 8 & 0xFF);
1729 
1730  /* msvcrt versions of strftime calls the invalid parameter handler
1731  * (aborting the process if one isn't set) if the parameters are out
1732  * of range. */
1733  time.tm_mon = av_clip(time.tm_mon, 0, 11);
1734  time.tm_mday = av_clip(time.tm_mday, 1, 31);
1735  time.tm_hour = av_clip(time.tm_hour, 0, 23);
1736  time.tm_min = av_clip(time.tm_min, 0, 59);
1737  time.tm_sec = av_clip(time.tm_sec, 0, 59);
1738 
1739  *str = av_mallocz(32);
1740  if (!*str)
1741  return AVERROR(ENOMEM);
1742  strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1743 
1744  return 0;
1745 }
1746 
1747 #define SET_STR_METADATA(pb, name, str) do { \
1748  if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1749  return ret; \
1750  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1751 } while (0)
1752 
1753 #define SET_UID_METADATA(pb, name, var, str) do { \
1754  avio_read(pb, var, 16); \
1755  if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1756  return ret; \
1757  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1758 } while (0)
1759 
1760 #define SET_TS_METADATA(pb, name, var, str) do { \
1761  var = avio_rb64(pb); \
1762  if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1763  return ret; \
1764  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1765 } while (0)
1766 
1767 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1768 {
1769  MXFContext *mxf = arg;
1770  AVFormatContext *s = mxf->fc;
1771  int ret;
1772  UID uid = { 0 };
1773  char *str = NULL;
1774  uint64_t ts;
1775  switch (tag) {
1776  case 0x3C01:
1777  SET_STR_METADATA(pb, "company_name", str);
1778  break;
1779  case 0x3C02:
1780  SET_STR_METADATA(pb, "product_name", str);
1781  break;
1782  case 0x3C04:
1783  SET_STR_METADATA(pb, "product_version", str);
1784  break;
1785  case 0x3C05:
1786  SET_UID_METADATA(pb, "product_uid", uid, str);
1787  break;
1788  case 0x3C06:
1789  SET_TS_METADATA(pb, "modification_date", ts, str);
1790  break;
1791  case 0x3C08:
1792  SET_STR_METADATA(pb, "application_platform", str);
1793  break;
1794  case 0x3C09:
1795  SET_UID_METADATA(pb, "generation_uid", uid, str);
1796  break;
1797  case 0x3C0A:
1798  SET_UID_METADATA(pb, "uid", uid, str);
1799  break;
1800  }
1801  return 0;
1802 }
1803 
1805  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1806 // { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_pack },
1807  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1808  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1809  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1810  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1811  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1812  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1813  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1814  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1815  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1816  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1817  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1818  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1819  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1820  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1821  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1822  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1823  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1824  { { 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 */
1825  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1826  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1827  { { 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 */
1828  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1829  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1830  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
1831  { { 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 */
1832  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
1833  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1834  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1835  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1836  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1837  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1838 };
1839 
1840 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1841 {
1842  AVIOContext *pb = mxf->fc->pb;
1843  MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1844  uint64_t klv_end = avio_tell(pb) + klv->length;
1845 
1846  if (!ctx)
1847  return AVERROR(ENOMEM);
1848  while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1849  int ret;
1850  int tag = avio_rb16(pb);
1851  int size = avio_rb16(pb); /* KLV specified by 0x53 */
1852  uint64_t next = avio_tell(pb) + size;
1853  UID uid = {0};
1854 
1855  av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1856  if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1857  av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1858  continue;
1859  }
1860  if (tag > 0x7FFF) { /* dynamic tag */
1861  int i;
1862  for (i = 0; i < mxf->local_tags_count; i++) {
1863  int local_tag = AV_RB16(mxf->local_tags+i*18);
1864  if (local_tag == tag) {
1865  memcpy(uid, mxf->local_tags+i*18+2, 16);
1866  av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1867  PRINT_KEY(mxf->fc, "uid", uid);
1868  }
1869  }
1870  }
1871  if (ctx_size && tag == 0x3C0A)
1872  avio_read(pb, ctx->uid, 16);
1873  else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1874  return ret;
1875 
1876  /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1877  * it extending past the end of the KLV though (zzuf5.mxf). */
1878  if (avio_tell(pb) > klv_end) {
1879  if (ctx_size)
1880  av_free(ctx);
1881 
1882  av_log(mxf->fc, AV_LOG_ERROR,
1883  "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1884  tag, klv->offset);
1885  return AVERROR_INVALIDDATA;
1886  } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1887  avio_seek(pb, next, SEEK_SET);
1888  }
1889  if (ctx_size) ctx->type = type;
1890  return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1891 }
1892 
1898 {
1899  AVIOContext *pb = mxf->fc->pb;
1900 
1901  if (!mxf->current_partition ||
1903  return 0; /* we've parsed all partitions */
1904 
1905  /* seek to previous partition */
1906  avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1907  mxf->current_partition = NULL;
1908 
1909  av_dlog(mxf->fc, "seeking to previous partition\n");
1910 
1911  return 1;
1912 }
1913 
1919 {
1920  AVIOContext *pb = mxf->fc->pb;
1921  int64_t ret;
1922 
1923  if (mxf->parsing_backward) {
1924  return mxf_seek_to_previous_partition(mxf);
1925  } else {
1926  uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1927  : mxf->last_partition;
1928 
1929  if (!offset) {
1930  av_dlog(mxf->fc, "no last partition\n");
1931  return 0;
1932  }
1933 
1934  av_dlog(mxf->fc, "seeking to last partition\n");
1935 
1936  /* remember where we were so we don't end up seeking further back than this */
1937  mxf->last_forward_tell = avio_tell(pb);
1938 
1939  if (!pb->seekable) {
1940  av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1941  return -1;
1942  }
1943 
1944  /* seek to last partition and parse backward */
1945  if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1946  av_log(mxf->fc, AV_LOG_ERROR,
1947  "failed to seek to last partition @ 0x%" PRIx64
1948  " (%"PRId64") - partial file?\n",
1949  mxf->run_in + offset, ret);
1950  return ret;
1951  }
1952 
1953  mxf->current_partition = NULL;
1954  mxf->parsing_backward = 1;
1955  }
1956 
1957  return 1;
1958 }
1959 
1965 {
1966  return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1967 }
1968 
1974 {
1975  int x;
1976 
1977  /* everything is already correct */
1978  if (mxf->op == OPAtom)
1979  return;
1980 
1981  for (x = 0; x < mxf->partitions_count; x++) {
1982  MXFPartition *p = &mxf->partitions[x];
1983 
1984  if (!p->body_sid)
1985  continue; /* BodySID == 0 -> no essence */
1986 
1987  if (x >= mxf->partitions_count - 1)
1988  break; /* last partition - can't compute length (and we don't need to) */
1989 
1990  /* essence container spans to the next partition */
1992 
1993  if (p->essence_length < 0) {
1994  /* next ThisPartition < essence_offset */
1995  p->essence_length = 0;
1996  av_log(mxf->fc, AV_LOG_ERROR,
1997  "partition %i: bad ThisPartition = %"PRIX64"\n",
1998  x+1, mxf->partitions[x+1].this_partition);
1999  }
2000  }
2001 }
2002 
2003 static int64_t round_to_kag(int64_t position, int kag_size)
2004 {
2005  /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2006  /* NOTE: kag_size may be any integer between 1 - 2^10 */
2007  int64_t ret = (position / kag_size) * kag_size;
2008  return ret == position ? ret : ret + kag_size;
2009 }
2010 
2012  MXFContext *mxf,
2013  KLVPacket *klv)
2014 {
2015  MXFPartition *cur_part = mxf->current_partition;
2016  /* for OP1a we compute essence_offset
2017  * for OPAtom we point essence_offset after the KL
2018  * (usually op1a_essence_offset + 20 or 25)
2019  * TODO: for OP1a we could eliminate this entire if statement, always
2020  * stopping parsing at op1a_essence_offset
2021  * for OPAtom we still need the actual essence_offset though
2022  * (the KL's length can vary)
2023  */
2024  int64_t op1a_essence_offset =
2025  round_to_kag(cur_part->this_partition + cur_part->pack_length,
2026  cur_part->kag_size) +
2027  round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
2028  round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
2029 
2030  if (mxf->op == OPAtom) {
2031  /* point essence_offset to the actual data
2032  * OPAtom has all the essence in one big KLV
2033  */
2034  cur_part->essence_offset = avio_tell(s->pb);
2035  cur_part->essence_length = klv->length;
2036  } else {
2037  /* NOTE: op1a_essence_offset may be less than to klv.offset
2038  * (C0023S01.mxf) */
2039  cur_part->essence_offset = op1a_essence_offset;
2040  }
2041 }
2042 
2043 static int is_pcm(enum AVCodecID codec_id)
2044 {
2045  /* we only care about "normal" PCM codecs until we get samples */
2046  return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2047 }
2048 
2055 {
2056  MXFContext *mxf = s->priv_data;
2057 
2058  /* assuming non-OPAtom == frame wrapped
2059  * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2060  if (mxf->op != OPAtom)
2061  return;
2062 
2063  /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2064  if (s->nb_streams != 1 ||
2066  !is_pcm(s->streams[0]->codec->codec_id) ||
2067  mxf->nb_index_tables != 1 ||
2068  mxf->index_tables[0].nb_segments != 1 ||
2069  mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2070  return;
2071 
2072  /* arbitrarily default to 48 kHz PAL audio frame size */
2073  /* TODO: We could compute this from the ratio between the audio
2074  * and video edit rates for 48 kHz NTSC we could use the
2075  * 1802-1802-1802-1802-1801 pattern. */
2076  mxf->edit_units_per_packet = 1920;
2077 }
2078 
2080 {
2081  MXFContext *mxf = s->priv_data;
2082  uint32_t length;
2083  int64_t file_size;
2084  KLVPacket klv;
2085 
2086  if (!s->pb->seekable)
2087  return;
2088 
2089  file_size = avio_size(s->pb);
2090  avio_seek(s->pb, file_size - 4, SEEK_SET);
2091  length = avio_rb32(s->pb);
2092  if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2093  goto end;
2094  avio_seek(s->pb, file_size - length, SEEK_SET);
2095  if (klv_read_packet(&klv, s->pb) < 0 ||
2097  klv.length != length - 20)
2098  goto end;
2099 
2100  avio_skip(s->pb, klv.length - 12);
2101  mxf->last_partition = avio_rb64(s->pb);
2102 
2103 end:
2104  avio_seek(s->pb, mxf->run_in, SEEK_SET);
2105 }
2106 
2108 {
2109  MXFContext *mxf = s->priv_data;
2110  KLVPacket klv;
2111  int64_t essence_offset = 0;
2112  int ret;
2113 
2114  mxf->last_forward_tell = INT64_MAX;
2115  mxf->edit_units_per_packet = 1;
2116 
2118  av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2119  return AVERROR_INVALIDDATA;
2120  }
2121  avio_seek(s->pb, -14, SEEK_CUR);
2122  mxf->fc = s;
2123  mxf->run_in = avio_tell(s->pb);
2124 
2126 
2127  while (!s->pb->eof_reached) {
2128 
2129  const MXFMetadataReadTableEntry *metadata;
2130 
2131  if (klv_read_packet(&klv, s->pb) < 0) {
2132  /* EOF - seek to previous partition or stop */
2133  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2134  break;
2135  else
2136  continue;
2137  }
2138 
2139  PRINT_KEY(s, "read header", klv.key);
2140  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2145 
2146  if (!mxf->current_partition) {
2147  av_log(mxf->fc, AV_LOG_ERROR,
2148  "found essence prior to first PartitionPack\n");
2149  return AVERROR_INVALIDDATA;
2150  }
2151 
2152  if (!mxf->current_partition->essence_offset) {
2153  compute_partition_essence_offset(s, mxf, &klv);
2154  }
2155 
2156  if (!essence_offset)
2157  essence_offset = klv.offset;
2158 
2159  /* seek to footer, previous partition or stop */
2160  if (mxf_parse_handle_essence(mxf) <= 0)
2161  break;
2162  continue;
2163  } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2164  klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2165  /* next partition pack - keep going, seek to previous partition or stop */
2166  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2167  break;
2168  else if (mxf->parsing_backward)
2169  continue;
2170  /* we're still parsing forward. proceed to parsing this partition pack */
2171  }
2172 
2173  for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2174  if (IS_KLV_KEY(klv.key, metadata->key)) {
2175  int res;
2176  if (klv.key[5] == 0x53) {
2177  res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2178  } else {
2179  uint64_t next = avio_tell(s->pb) + klv.length;
2180  res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2181 
2182  /* only seek forward, else this can loop for a long time */
2183  if (avio_tell(s->pb) > next) {
2184  av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2185  klv.offset);
2186  return AVERROR_INVALIDDATA;
2187  }
2188 
2189  avio_seek(s->pb, next, SEEK_SET);
2190  }
2191  if (res < 0) {
2192  av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2193  return res;
2194  }
2195  break;
2196  } else {
2197  av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2198  UID_ARG(klv.key));
2199  }
2200  }
2201  if (!metadata->read)
2202  avio_skip(s->pb, klv.length);
2203  }
2204  /* FIXME avoid seek */
2205  if (!essence_offset) {
2206  av_log(s, AV_LOG_ERROR, "no essence\n");
2207  return AVERROR_INVALIDDATA;
2208  }
2209  avio_seek(s->pb, essence_offset, SEEK_SET);
2210 
2212 
2213  /* we need to do this before computing the index tables
2214  * to be able to fill in zero IndexDurations with st->duration */
2215  if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2216  return ret;
2217 
2218  if ((ret = mxf_compute_index_tables(mxf)) < 0)
2219  return ret;
2220 
2221  if (mxf->nb_index_tables > 1) {
2222  /* TODO: look up which IndexSID to use via EssenceContainerData */
2223  av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2224  mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2225  } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2226  av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2227  return AVERROR_INVALIDDATA;
2228  }
2229 
2231 
2232  return 0;
2233 }
2234 
2239 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2240 {
2241  int64_t last_ofs = -1, next_ofs = -1;
2242  MXFIndexTable *t = &mxf->index_tables[0];
2243 
2244  /* this is called from the OP1a demuxing logic, which means there
2245  * may be no index tables */
2246  if (mxf->nb_index_tables <= 0)
2247  return -1;
2248 
2249  /* find mxf->current_edit_unit so that the next edit unit starts ahead
2250  * of current_offset */
2251  while (mxf->current_edit_unit >= 0) {
2252  if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2253  NULL, &next_ofs, 0) < 0)
2254  return -1;
2255 
2256  if (next_ofs <= last_ofs) {
2257  /* large next_ofs didn't change or current_edit_unit wrapped
2258  * around this fixes the infinite loop on zzuf3.mxf */
2259  av_log(mxf->fc, AV_LOG_ERROR,
2260  "next_ofs didn't change. not deriving packet timestamps\n");
2261  return -1;
2262  }
2263 
2264  if (next_ofs > current_offset)
2265  break;
2266 
2267  last_ofs = next_ofs;
2268  mxf->current_edit_unit++;
2269  }
2270 
2271  /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2272  * may lack IndexEntryArrays */
2273  if (mxf->current_edit_unit < 0)
2274  return -1;
2275 
2276  return next_ofs;
2277 }
2278 
2279 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2280  uint64_t *sample_count)
2281 {
2282  int i, total = 0, size = 0;
2283  AVStream *st = mxf->fc->streams[stream_index];
2284  MXFTrack *track = st->priv_data;
2285  AVRational time_base = av_inv_q(track->edit_rate);
2286  AVRational sample_rate = av_inv_q(st->time_base);
2287  const MXFSamplesPerFrame *spf = NULL;
2288 
2289  if ((sample_rate.num / sample_rate.den) == 48000)
2290  spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2291  if (!spf) {
2292  int remainder = (sample_rate.num * time_base.num) %
2293  (time_base.den * sample_rate.den);
2294  *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2295  av_mul_q(sample_rate, time_base)));
2296  if (remainder)
2297  av_log(mxf->fc, AV_LOG_WARNING,
2298  "seeking detected on stream #%d with time base (%d/%d) and "
2299  "sample rate (%d/%d), audio pts won't be accurate.\n",
2300  stream_index, time_base.num, time_base.den,
2301  sample_rate.num, sample_rate.den);
2302  return 0;
2303  }
2304 
2305  while (spf->samples_per_frame[size]) {
2306  total += spf->samples_per_frame[size];
2307  size++;
2308  }
2309 
2310  if (!size)
2311  return 0;
2312 
2313  *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2314  for (i = 0; i < mxf->current_edit_unit % size; i++) {
2315  *sample_count += spf->samples_per_frame[i];
2316  }
2317 
2318  return 0;
2319 }
2320 
2322  AVPacket *pkt)
2323 {
2324  MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2325  int64_t bits_per_sample = codec->bits_per_coded_sample;
2326 
2327  if (!bits_per_sample)
2328  bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2329 
2330  pkt->pts = track->sample_count;
2331 
2332  if (codec->channels <= 0 || codec->channels * bits_per_sample < 8)
2333  return AVERROR_INVALIDDATA;
2334 
2335  track->sample_count += pkt->size / (codec->channels * bits_per_sample / 8);
2336  return 0;
2337 }
2338 
2340 {
2341  KLVPacket klv;
2342  MXFContext *mxf = s->priv_data;
2343  int ret;
2344 
2345  while (!s->pb->eof_reached) {
2346  if ((ret = klv_read_packet(&klv, s->pb)) < 0)
2347  return ret;
2348  PRINT_KEY(s, "read packet", klv.key);
2349  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2351  ret = mxf_decrypt_triplet(s, pkt, &klv);
2352  if (ret < 0) {
2353  av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2354  return ret;
2355  }
2356  return 0;
2357  }
2360  int index = mxf_get_stream_index(s, &klv);
2361  int64_t next_ofs, next_klv;
2362  AVStream *st;
2363  MXFTrack *track;
2364  AVCodecContext *codec;
2365 
2366  if (index < 0) {
2367  av_log(s, AV_LOG_ERROR,
2368  "error getting stream index %"PRIu32"\n",
2369  AV_RB32(klv.key + 12));
2370  goto skip;
2371  }
2372 
2373  st = s->streams[index];
2374  track = st->priv_data;
2375 
2376  if (s->streams[index]->discard == AVDISCARD_ALL)
2377  goto skip;
2378 
2379  next_klv = avio_tell(s->pb) + klv.length;
2380  next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2381 
2382  if (next_ofs >= 0 && next_klv > next_ofs) {
2383  /* if this check is hit then it's possible OPAtom was treated
2384  * as OP1a truncate the packet since it's probably very large
2385  * (>2 GiB is common) */
2387  "OPAtom misinterpreted as OP1a?"
2388  "KLV for edit unit %i extending into "
2389  "next edit unit",
2390  mxf->current_edit_unit);
2391  klv.length = next_ofs - avio_tell(s->pb);
2392  }
2393 
2394  /* check for 8 channels AES3 element */
2395  if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2396  ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2397  pkt, klv.length);
2398  if (ret < 0) {
2399  av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2400  return ret;
2401  }
2402  } else {
2403  ret = av_get_packet(s->pb, pkt, klv.length);
2404  if (ret < 0)
2405  return ret;
2406  }
2407  pkt->stream_index = index;
2408  pkt->pos = klv.offset;
2409 
2410  codec = s->streams[index]->codec;
2411 
2412  if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2413  /* mxf->current_edit_unit good - see if we have an
2414  * index table to derive timestamps from */
2415  MXFIndexTable *t = &mxf->index_tables[0];
2416 
2417  if (mxf->nb_index_tables >= 1 &&
2418  mxf->current_edit_unit < t->nb_ptses) {
2419  pkt->dts = mxf->current_edit_unit + t->first_dts;
2420  pkt->pts = t->ptses[mxf->current_edit_unit];
2421  } else if (track->intra_only) {
2422  /* intra-only -> PTS = EditUnit.
2423  * let utils.c figure out DTS since it can be
2424  * < PTS if low_delay = 0 (Sony IMX30) */
2425  pkt->pts = mxf->current_edit_unit;
2426  }
2427  } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2428  ret = mxf_set_audio_pts(mxf, codec, pkt);
2429  if (ret < 0)
2430  return ret;
2431  }
2432 
2433  /* seek for truncated packets */
2434  avio_seek(s->pb, next_klv, SEEK_SET);
2435 
2436  return 0;
2437  } else
2438  skip:
2439  avio_skip(s->pb, klv.length);
2440  }
2441  return AVERROR_EOF;
2442 }
2443 
2445 {
2446  MXFContext *mxf = s->priv_data;
2447  int ret, size;
2448  int64_t ret64, pos, next_pos;
2449  AVStream *st;
2450  MXFIndexTable *t;
2451  int edit_units;
2452 
2453  if (mxf->op != OPAtom)
2454  return mxf_read_packet_old(s, pkt);
2455 
2456  /* OPAtom - clip wrapped demuxing */
2457  /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2458  st = s->streams[0];
2459  t = &mxf->index_tables[0];
2460 
2461  if (mxf->current_edit_unit >= st->duration)
2462  return AVERROR_EOF;
2463 
2464  edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2465 
2466  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2467  return ret;
2468 
2469  /* compute size by finding the next edit unit or the end of the essence container
2470  * not pretty, but it works */
2471  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2472  (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2473  av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2474  return AVERROR_INVALIDDATA;
2475  }
2476 
2477  if ((size = next_pos - pos) <= 0) {
2478  av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2479  return AVERROR_INVALIDDATA;
2480  }
2481 
2482  if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2483  return ret64;
2484 
2485  if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2486  return ret < 0 ? ret : AVERROR_EOF;
2487 
2488  pkt->stream_index = 0;
2489 
2490  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2491  mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2492  pkt->dts = mxf->current_edit_unit + t->first_dts;
2493  pkt->pts = t->ptses[mxf->current_edit_unit];
2494  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2495  int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2496  if (ret < 0)
2497  return ret;
2498  }
2499 
2500  mxf->current_edit_unit += edit_units;
2501 
2502  return 0;
2503 }
2504 
2505 
2507 {
2508  MXFContext *mxf = s->priv_data;
2509  MXFIndexTableSegment *seg;
2510  int i;
2511 
2512  av_freep(&mxf->packages_refs);
2513 
2514  for (i = 0; i < s->nb_streams; i++)
2515  s->streams[i]->priv_data = NULL;
2516 
2517  for (i = 0; i < mxf->metadata_sets_count; i++) {
2518  switch (mxf->metadata_sets[i]->type) {
2519  case Descriptor:
2520  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2521  break;
2522  case MultipleDescriptor:
2523  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2524  break;
2525  case Sequence:
2526  av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2527  break;
2528  case SourcePackage:
2529  case MaterialPackage:
2530  av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2531  break;
2532  case IndexTableSegment:
2533  seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2535  av_freep(&seg->flag_entries);
2537  break;
2538  default:
2539  break;
2540  }
2541  av_freep(&mxf->metadata_sets[i]);
2542  }
2543  av_freep(&mxf->partitions);
2544  av_freep(&mxf->metadata_sets);
2545  av_freep(&mxf->aesc);
2546  av_freep(&mxf->local_tags);
2547 
2548  for (i = 0; i < mxf->nb_index_tables; i++) {
2549  av_freep(&mxf->index_tables[i].segments);
2550  av_freep(&mxf->index_tables[i].ptses);
2551  av_freep(&mxf->index_tables[i].fake_index);
2552  }
2553  av_freep(&mxf->index_tables);
2554 
2555  return 0;
2556 }
2557 
2558 static int mxf_probe(AVProbeData *p) {
2559  uint8_t *bufp = p->buf;
2560  uint8_t *end = p->buf + p->buf_size;
2561 
2562  if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2563  return 0;
2564 
2565  /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2566  end -= sizeof(mxf_header_partition_pack_key);
2567  for (; bufp < end; bufp++) {
2569  return AVPROBE_SCORE_MAX;
2570  }
2571  return 0;
2572 }
2573 
2574 /* rudimentary byte seek */
2575 /* XXX: use MXF Index */
2576 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2577 {
2578  AVStream *st = s->streams[stream_index];
2579  int64_t seconds;
2580  MXFContext* mxf = s->priv_data;
2581  int64_t seekpos;
2582  int i, ret;
2583  MXFIndexTable *t;
2584  MXFTrack *source_track = st->priv_data;
2585 
2586  /* if audio then truncate sample_time to EditRate */
2587  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2588  sample_time = av_rescale_q(sample_time, st->time_base,
2589  av_inv_q(source_track->edit_rate));
2590 
2591  if (mxf->nb_index_tables <= 0) {
2592  if (!s->bit_rate)
2593  return AVERROR_INVALIDDATA;
2594  if (sample_time < 0)
2595  sample_time = 0;
2596  seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2597 
2598  seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2599  if (seekpos < 0)
2600  return seekpos;
2601 
2602  ff_update_cur_dts(s, st, sample_time);
2603  mxf->current_edit_unit = sample_time;
2604  } else {
2605  t = &mxf->index_tables[0];
2606 
2607  /* clamp above zero, else ff_index_search_timestamp() returns negative
2608  * this also means we allow seeking before the start */
2609  sample_time = FFMAX(sample_time, 0);
2610 
2611  if (t->fake_index) {
2612  /* behave as if we have a proper index */
2613  if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2614  return sample_time;
2615  } else {
2616  /* no IndexEntryArray (one or more CBR segments)
2617  * make sure we don't seek past the end */
2618  sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2619  }
2620 
2621  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2622  return ret;
2623 
2624  ff_update_cur_dts(s, st, sample_time);
2625  mxf->current_edit_unit = sample_time;
2626  avio_seek(s->pb, seekpos, SEEK_SET);
2627  }
2628 
2629  // Update all tracks sample count
2630  for (i = 0; i < s->nb_streams; i++) {
2631  AVStream *cur_st = s->streams[i];
2632  MXFTrack *cur_track = cur_st->priv_data;
2633  uint64_t current_sample_count = 0;
2634  if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2635  ret = mxf_compute_sample_count(mxf, i, &current_sample_count);
2636  if (ret < 0)
2637  return ret;
2638 
2639  cur_track->sample_count = current_sample_count;
2640  }
2641  }
2642  return 0;
2643 }
2644 
2646  .name = "mxf",
2647  .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2648  .priv_data_size = sizeof(MXFContext),
2649  .read_probe = mxf_probe,
2654 };
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:1973
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:1370
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:776
Definition: mxf.h:38
static const MXFMetadataReadTableEntry mxf_metadata_read_table[]
Definition: mxfdec.c:1804
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:1897
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:2558
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:2079
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:1760
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:2576
static int mxf_uid_to_str(UID uid, char **str)
Definition: mxfdec.c:1702
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:2107
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:1964
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
Definition: mxfdec.c:1840
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mxfdec.c:2444
Format I/O context.
Definition: avformat.h:922
Definition: mxfdec.c:65
static int is_pcm(enum AVCodecID codec_id)
Definition: mxfdec.c:2043
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:2506
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:1061
int complete
Definition: mxfdec.c:77
static void compute_partition_essence_offset(AVFormatContext *s, MXFContext *mxf, KLVPacket *klv)
Definition: mxfdec.c:2011
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:1270
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:961
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:992
uint8_t track_number[4]
Definition: mxfdec.c:123
static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
Definition: mxfdec.c:1720
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:1753
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:2055
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:813
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:680
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:1111
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:733
unsigned matching_len
Definition: mxf.h:66
static const MXFCodecUL mxf_intra_only_picture_essence_coding_uls[]
Definition: mxfdec.c:967
Definition: mxf.h:53
uint64_t length
Definition: mxf.h:61
static const MXFCodecUL mxf_sound_essence_container_uls[]
Definition: mxfdec.c:973
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:1918
#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:2003
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:619
int64_t duration
Definition: mxfdec.c:113
static int mxf_match_uid(const UID key, const UID uid, int len)
Definition: mxfdec.c:917
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:927
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:937
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:1681
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:641
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:1767
static const char * mxf_data_essence_descriptor[]
Definition: mxfdec.c:988
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:2054
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:707
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:832
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:983
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:420
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:1362
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:601
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:952
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:2321
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:2645
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:591
int body_sid
Definition: mxfdec.c:81
static int mxf_compute_ptses_fake_index(MXFContext *mxf, MXFIndexTable *index_table)
Definition: mxfdec.c:1159
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:577
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:1090
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:659
#define SET_STR_METADATA(pb, name, str)
Definition: mxfdec.c:1747
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:2239
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:2339
static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
Definition: mxfdec.c:2279
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