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 
748  sizeof(*segment->temporal_offset_entries));
749  segment->flag_entries = av_mallocz(segment->nb_index_entries *
750  sizeof(*segment->flag_entries));
752  sizeof(*segment->stream_offset_entries));
753 
754  if (!segment->flag_entries || !segment->stream_offset_entries ||
755  !segment->temporal_offset_entries) {
756  av_freep(&segment->flag_entries);
757  av_freep(&segment->stream_offset_entries);
759  return AVERROR(ENOMEM);
760  }
761 
762  for (i = 0; i < segment->nb_index_entries; i++) {
763  segment->temporal_offset_entries[i] = avio_r8(pb);
764  avio_r8(pb); /* KeyFrameOffset */
765  segment->flag_entries[i] = avio_r8(pb);
766  segment->stream_offset_entries[i] = avio_rb64(pb);
767  avio_skip(pb, length - 11);
768  }
769  return 0;
770 }
771 
772 static int mxf_read_index_table_segment(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
773 {
775  switch(tag) {
776  case 0x3F05:
777  segment->edit_unit_byte_count = avio_rb32(pb);
778  av_dlog(NULL, "EditUnitByteCount %d\n", segment->edit_unit_byte_count);
779  break;
780  case 0x3F06:
781  segment->index_sid = avio_rb32(pb);
782  av_dlog(NULL, "IndexSID %d\n", segment->index_sid);
783  break;
784  case 0x3F07:
785  segment->body_sid = avio_rb32(pb);
786  av_dlog(NULL, "BodySID %d\n", segment->body_sid);
787  break;
788  case 0x3F0A:
789  av_dlog(NULL, "IndexEntryArray found\n");
790  return mxf_read_index_entry_array(pb, segment);
791  case 0x3F0B:
792  segment->index_edit_rate.num = avio_rb32(pb);
793  segment->index_edit_rate.den = avio_rb32(pb);
794  av_dlog(NULL, "IndexEditRate %d/%d\n", segment->index_edit_rate.num,
795  segment->index_edit_rate.den);
796  break;
797  case 0x3F0C:
798  segment->index_start_position = avio_rb64(pb);
799  av_dlog(NULL, "IndexStartPosition %"PRId64"\n", segment->index_start_position);
800  break;
801  case 0x3F0D:
802  segment->index_duration = avio_rb64(pb);
803  av_dlog(NULL, "IndexDuration %"PRId64"\n", segment->index_duration);
804  break;
805  }
806  return 0;
807 }
808 
809 static void mxf_read_pixel_layout(AVIOContext *pb, MXFDescriptor *descriptor)
810 {
811  int code, value, ofs = 0;
812  char layout[16] = {0};
813 
814  do {
815  code = avio_r8(pb);
816  value = avio_r8(pb);
817  av_dlog(NULL, "pixel layout: code %#x\n", code);
818 
819  if (ofs < 16) {
820  layout[ofs++] = code;
821  layout[ofs++] = value;
822  }
823  } while (code != 0); /* SMPTE 377M E.2.46 */
824 
825  ff_mxf_decode_pixel_layout(layout, &descriptor->pix_fmt);
826 }
827 
828 static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
829 {
830  MXFDescriptor *descriptor = arg;
831  descriptor->pix_fmt = AV_PIX_FMT_NONE;
832  switch(tag) {
833  case 0x3F01:
834  descriptor->sub_descriptors_count = avio_rb32(pb);
835  if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
836  return AVERROR_INVALIDDATA;
837  descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
838  if (!descriptor->sub_descriptors_refs)
839  return AVERROR(ENOMEM);
840  avio_skip(pb, 4); /* useless size of objects, always 16 according to specs */
841  avio_read(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
842  break;
843  case 0x3004:
844  avio_read(pb, descriptor->essence_container_ul, 16);
845  break;
846  case 0x3006:
847  descriptor->linked_track_id = avio_rb32(pb);
848  break;
849  case 0x3201: /* PictureEssenceCoding */
850  avio_read(pb, descriptor->essence_codec_ul, 16);
851  break;
852  case 0x3203:
853  descriptor->width = avio_rb32(pb);
854  break;
855  case 0x3202:
856  descriptor->height = avio_rb32(pb);
857  break;
858  case 0x320C:
859  descriptor->frame_layout = avio_r8(pb);
860  break;
861  case 0x320E:
862  descriptor->aspect_ratio.num = avio_rb32(pb);
863  descriptor->aspect_ratio.den = avio_rb32(pb);
864  break;
865  case 0x3212:
866  descriptor->field_dominance = avio_r8(pb);
867  break;
868  case 0x3301:
869  descriptor->component_depth = avio_rb32(pb);
870  break;
871  case 0x3302:
872  descriptor->horiz_subsampling = avio_rb32(pb);
873  break;
874  case 0x3308:
875  descriptor->vert_subsampling = avio_rb32(pb);
876  break;
877  case 0x3D03:
878  descriptor->sample_rate.num = avio_rb32(pb);
879  descriptor->sample_rate.den = avio_rb32(pb);
880  break;
881  case 0x3D06: /* SoundEssenceCompression */
882  avio_read(pb, descriptor->essence_codec_ul, 16);
883  break;
884  case 0x3D07:
885  descriptor->channels = avio_rb32(pb);
886  break;
887  case 0x3D01:
888  descriptor->bits_per_sample = avio_rb32(pb);
889  break;
890  case 0x3401:
891  mxf_read_pixel_layout(pb, descriptor);
892  break;
893  default:
894  /* Private uid used by SONY C0023S01.mxf */
896  av_free(descriptor->extradata);
897  descriptor->extradata_size = 0;
898  descriptor->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
899  if (!descriptor->extradata)
900  return AVERROR(ENOMEM);
901  descriptor->extradata_size = size;
902  avio_read(pb, descriptor->extradata, size);
903  }
904  break;
905  }
906  return 0;
907 }
908 
909 /*
910  * Match an uid independently of the version byte and up to len common bytes
911  * Returns: boolean
912  */
913 static int mxf_match_uid(const UID key, const UID uid, int len)
914 {
915  int i;
916  for (i = 0; i < len; i++) {
917  if (i != 7 && key[i] != uid[i])
918  return 0;
919  }
920  return 1;
921 }
922 
923 static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
924 {
925  while (uls->uid[0]) {
926  if(mxf_match_uid(uls->uid, *uid, uls->matching_len))
927  break;
928  uls++;
929  }
930  return uls;
931 }
932 
933 static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
934 {
935  int i;
936 
937  if (!strong_ref)
938  return NULL;
939  for (i = 0; i < mxf->metadata_sets_count; i++) {
940  if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
941  (type == AnyType || mxf->metadata_sets[i]->type == type)) {
942  return mxf->metadata_sets[i];
943  }
944  }
945  return NULL;
946 }
947 
949  // video essence container uls
950  { { 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 */
951  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14, AV_CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
952  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x01,0x0d,0x01,0x03,0x01,0x02,0x05,0x00,0x00 }, 14, AV_CODEC_ID_RAWVIDEO }, /* Uncompressed Picture */
953  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
954 };
955 
956 /* EC ULs for intra-only formats */
958  { { 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 */
959  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
960 };
961 
962 /* intra-only PictureEssenceCoding ULs, where no corresponding EC UL exists */
964  { { 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 */
965  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 }, 14, AV_CODEC_ID_JPEG2000 }, /* JPEG2000 Codestream */
966  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
967 };
968 
970  // sound essence container uls
971  { { 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 */
972  { { 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 */
973  { { 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 */
974  { { 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 */
975  { { 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) */
976  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, 0, AV_CODEC_ID_NONE },
977 };
978 
980  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, 0 },
981  { { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x09,0x0d,0x01,0x03,0x01,0x02,0x0e,0x00,0x00 }, 16, AV_CODEC_ID_NONE },
982 };
983 
984 static const char* mxf_data_essence_descriptor[] = {
985  "vbi_vanc_smpte_436M",
986 };
987 
988 static int mxf_get_sorted_table_segments(MXFContext *mxf, int *nb_sorted_segments, MXFIndexTableSegment ***sorted_segments)
989 {
990  int i, j, nb_segments = 0;
991  MXFIndexTableSegment **unsorted_segments;
992  int last_body_sid = -1, last_index_sid = -1, last_index_start = -1;
993 
994  /* count number of segments, allocate arrays and copy unsorted segments */
995  for (i = 0; i < mxf->metadata_sets_count; i++)
996  if (mxf->metadata_sets[i]->type == IndexTableSegment)
997  nb_segments++;
998 
999  if (!nb_segments)
1000  return AVERROR_INVALIDDATA;
1001 
1002  *sorted_segments = av_mallocz(nb_segments * sizeof(**sorted_segments));
1003  unsorted_segments = av_mallocz(nb_segments * sizeof(*unsorted_segments));
1004  if (!*sorted_segments || !unsorted_segments) {
1005  av_freep(sorted_segments);
1006  av_free(unsorted_segments);
1007  return AVERROR(ENOMEM);
1008  }
1009 
1010  for (i = j = 0; i < mxf->metadata_sets_count; i++)
1011  if (mxf->metadata_sets[i]->type == IndexTableSegment)
1012  unsorted_segments[j++] = (MXFIndexTableSegment*)mxf->metadata_sets[i];
1013 
1014  *nb_sorted_segments = 0;
1015 
1016  /* sort segments by {BodySID, IndexSID, IndexStartPosition}, remove duplicates while we're at it */
1017  for (i = 0; i < nb_segments; i++) {
1018  int best = -1, best_body_sid = -1, best_index_sid = -1, best_index_start = -1;
1019  uint64_t best_index_duration = 0;
1020 
1021  for (j = 0; j < nb_segments; j++) {
1022  MXFIndexTableSegment *s = unsorted_segments[j];
1023 
1024  /* Require larger BosySID, IndexSID or IndexStartPosition then the previous entry. This removes duplicates.
1025  * We want the smallest values for the keys than what we currently have, unless this is the first such entry this time around.
1026  * If we come across an entry with the same IndexStartPosition but larger IndexDuration, then we'll prefer it over the one we currently have.
1027  */
1028  if ((i == 0 || s->body_sid > last_body_sid || s->index_sid > last_index_sid || s->index_start_position > last_index_start) &&
1029  (best == -1 || s->body_sid < best_body_sid || s->index_sid < best_index_sid || s->index_start_position < best_index_start ||
1030  (s->index_start_position == best_index_start && s->index_duration > best_index_duration))) {
1031  best = j;
1032  best_body_sid = s->body_sid;
1033  best_index_sid = s->index_sid;
1034  best_index_start = s->index_start_position;
1035  best_index_duration = s->index_duration;
1036  }
1037  }
1038 
1039  /* no suitable entry found -> we're done */
1040  if (best == -1)
1041  break;
1042 
1043  (*sorted_segments)[(*nb_sorted_segments)++] = unsorted_segments[best];
1044  last_body_sid = best_body_sid;
1045  last_index_sid = best_index_sid;
1046  last_index_start = best_index_start;
1047  }
1048 
1049  av_free(unsorted_segments);
1050 
1051  return 0;
1052 }
1053 
1057 static int mxf_absolute_bodysid_offset(MXFContext *mxf, int body_sid, int64_t offset, int64_t *offset_out)
1058 {
1059  int x;
1060  int64_t offset_in = offset; /* for logging */
1061 
1062  for (x = 0; x < mxf->partitions_count; x++) {
1063  MXFPartition *p = &mxf->partitions[x];
1064 
1065  if (p->body_sid != body_sid)
1066  continue;
1067 
1068  if (offset < p->essence_length || !p->essence_length) {
1069  *offset_out = p->essence_offset + offset;
1070  return 0;
1071  }
1072 
1073  offset -= p->essence_length;
1074  }
1075 
1076  av_log(mxf->fc, AV_LOG_ERROR,
1077  "failed to find absolute offset of %"PRIX64" in BodySID %i - partial file?\n",
1078  offset_in, body_sid);
1079 
1080  return AVERROR_INVALIDDATA;
1081 }
1082 
1086 static int64_t mxf_essence_container_end(MXFContext *mxf, int body_sid)
1087 {
1088  int x;
1089  int64_t ret = 0;
1090 
1091  for (x = 0; x < mxf->partitions_count; x++) {
1092  MXFPartition *p = &mxf->partitions[x];
1093 
1094  if (p->body_sid != body_sid)
1095  continue;
1096 
1097  if (!p->essence_length)
1098  return 0;
1099 
1100  ret = p->essence_offset + p->essence_length;
1101  }
1102 
1103  return ret;
1104 }
1105 
1106 /* EditUnit -> absolute offset */
1107 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)
1108 {
1109  int i;
1110  int64_t offset_temp = 0;
1111 
1112  for (i = 0; i < index_table->nb_segments; i++) {
1113  MXFIndexTableSegment *s = index_table->segments[i];
1114 
1115  edit_unit = FFMAX(edit_unit, s->index_start_position); /* clamp if trying to seek before start */
1116 
1117  if (edit_unit < s->index_start_position + s->index_duration) {
1118  int64_t index = edit_unit - s->index_start_position;
1119 
1120  if (s->edit_unit_byte_count)
1121  offset_temp += s->edit_unit_byte_count * index;
1122  else if (s->nb_index_entries) {
1123  if (s->nb_index_entries == 2 * s->index_duration + 1)
1124  index *= 2; /* Avid index */
1125 
1126  if (index < 0 || index >= s->nb_index_entries) {
1127  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" IndexEntryArray too small\n",
1128  index_table->index_sid, s->index_start_position);
1129  return AVERROR_INVALIDDATA;
1130  }
1131 
1132  offset_temp = s->stream_offset_entries[index];
1133  } else {
1134  av_log(mxf->fc, AV_LOG_ERROR, "IndexSID %i segment at %"PRId64" missing EditUnitByteCount and IndexEntryArray\n",
1135  index_table->index_sid, s->index_start_position);
1136  return AVERROR_INVALIDDATA;
1137  }
1138 
1139  if (edit_unit_out)
1140  *edit_unit_out = edit_unit;
1141 
1142  return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out);
1143  } else {
1144  /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */
1145  offset_temp += s->edit_unit_byte_count * s->index_duration;
1146  }
1147  }
1148 
1149  if (nag)
1150  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);
1151 
1152  return AVERROR_INVALIDDATA;
1153 }
1154 
1156 {
1157  int i, j, x;
1158  int8_t max_temporal_offset = -128;
1159 
1160  /* first compute how many entries we have */
1161  for (i = 0; i < index_table->nb_segments; i++) {
1162  MXFIndexTableSegment *s = index_table->segments[i];
1163 
1164  if (!s->nb_index_entries) {
1165  index_table->nb_ptses = 0;
1166  return 0; /* no TemporalOffsets */
1167  }
1168 
1169  index_table->nb_ptses += s->index_duration;
1170  }
1171 
1172  /* paranoid check */
1173  if (index_table->nb_ptses <= 0)
1174  return 0;
1175 
1176  if (index_table->nb_ptses > INT_MAX / sizeof(AVIndexEntry))
1177  return AVERROR(ENOMEM);
1178 
1179  index_table->ptses = av_mallocz(index_table->nb_ptses *
1180  sizeof(int64_t));
1181  index_table->fake_index = av_mallocz(index_table->nb_ptses *
1182  sizeof(AVIndexEntry));
1183  if (!index_table->ptses || !index_table->fake_index) {
1184  av_freep(&index_table->ptses);
1185  return AVERROR(ENOMEM);
1186  }
1187 
1188  /* we may have a few bad TemporalOffsets
1189  * make sure the corresponding PTSes don't have the bogus value 0 */
1190  for (x = 0; x < index_table->nb_ptses; x++)
1191  index_table->ptses[x] = AV_NOPTS_VALUE;
1192 
1220  for (i = x = 0; i < index_table->nb_segments; i++) {
1221  MXFIndexTableSegment *s = index_table->segments[i];
1222  int index_delta = 1;
1223  int n = s->nb_index_entries;
1224 
1225  if (s->nb_index_entries == 2 * s->index_duration + 1) {
1226  index_delta = 2; /* Avid index */
1227  /* ignore the last entry - it's the size of the essence container */
1228  n--;
1229  }
1230 
1231  for (j = 0; j < n; j += index_delta, x++) {
1232  int offset = s->temporal_offset_entries[j] / index_delta;
1233  int index = x + offset;
1234 
1235  if (x >= index_table->nb_ptses) {
1236  av_log(mxf->fc, AV_LOG_ERROR,
1237  "x >= nb_ptses - IndexEntryCount %i < IndexDuration %"PRId64"?\n",
1239  break;
1240  }
1241 
1242  index_table->fake_index[x].timestamp = x;
1243  index_table->fake_index[x].flags = !(s->flag_entries[j] & 0x30) ? AVINDEX_KEYFRAME : 0;
1244 
1245  if (index < 0 || index >= index_table->nb_ptses) {
1246  av_log(mxf->fc, AV_LOG_ERROR,
1247  "index entry %i + TemporalOffset %i = %i, which is out of bounds\n",
1248  x, offset, index);
1249  continue;
1250  }
1251 
1252  index_table->ptses[index] = x;
1253  max_temporal_offset = FFMAX(max_temporal_offset, offset);
1254  }
1255  }
1256 
1257  index_table->first_dts = -max_temporal_offset;
1258 
1259  return 0;
1260 }
1261 
1267 {
1268  int i, j, k, ret, nb_sorted_segments;
1269  MXFIndexTableSegment **sorted_segments = NULL;
1270 
1271  if ((ret = mxf_get_sorted_table_segments(mxf, &nb_sorted_segments, &sorted_segments)) ||
1272  nb_sorted_segments <= 0) {
1273  av_log(mxf->fc, AV_LOG_WARNING, "broken or empty index\n");
1274  return 0;
1275  }
1276 
1277  /* sanity check and count unique BodySIDs/IndexSIDs */
1278  for (i = 0; i < nb_sorted_segments; i++) {
1279  if (i == 0 || sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid)
1280  mxf->nb_index_tables++;
1281  else if (sorted_segments[i-1]->body_sid != sorted_segments[i]->body_sid) {
1282  av_log(mxf->fc, AV_LOG_ERROR, "found inconsistent BodySID\n");
1283  ret = AVERROR_INVALIDDATA;
1284  goto finish_decoding_index;
1285  }
1286  }
1287 
1289  sizeof(*mxf->index_tables));
1290  if (!mxf->index_tables) {
1291  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate index tables\n");
1292  ret = AVERROR(ENOMEM);
1293  goto finish_decoding_index;
1294  }
1295 
1296  /* distribute sorted segments to index tables */
1297  for (i = j = 0; i < nb_sorted_segments; i++) {
1298  if (i != 0 && sorted_segments[i-1]->index_sid != sorted_segments[i]->index_sid) {
1299  /* next IndexSID */
1300  j++;
1301  }
1302 
1303  mxf->index_tables[j].nb_segments++;
1304  }
1305 
1306  for (i = j = 0; j < mxf->nb_index_tables; i += mxf->index_tables[j++].nb_segments) {
1307  MXFIndexTable *t = &mxf->index_tables[j];
1308 
1310  sizeof(*t->segments));
1311 
1312  if (!t->segments) {
1313  av_log(mxf->fc, AV_LOG_ERROR, "failed to allocate IndexTableSegment"
1314  " pointer array\n");
1315  ret = AVERROR(ENOMEM);
1316  goto finish_decoding_index;
1317  }
1318 
1319  if (sorted_segments[i]->index_start_position)
1320  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i starts at EditUnit %"PRId64" - seeking may not work as expected\n",
1321  sorted_segments[i]->index_sid, sorted_segments[i]->index_start_position);
1322 
1323  memcpy(t->segments, &sorted_segments[i], t->nb_segments * sizeof(MXFIndexTableSegment*));
1324  t->index_sid = sorted_segments[i]->index_sid;
1325  t->body_sid = sorted_segments[i]->body_sid;
1326 
1327  if ((ret = mxf_compute_ptses_fake_index(mxf, t)) < 0)
1328  goto finish_decoding_index;
1329 
1330  /* fix zero IndexDurations */
1331  for (k = 0; k < t->nb_segments; k++) {
1332  if (t->segments[k]->index_duration)
1333  continue;
1334 
1335  if (t->nb_segments > 1)
1336  av_log(mxf->fc, AV_LOG_WARNING, "IndexSID %i segment %i has zero IndexDuration and there's more than one segment\n",
1337  t->index_sid, k);
1338 
1339  if (mxf->fc->nb_streams <= 0) {
1340  av_log(mxf->fc, AV_LOG_WARNING, "no streams?\n");
1341  break;
1342  }
1343 
1344  /* assume the first stream's duration is reasonable
1345  * leave index_duration = 0 on further segments in case we have any (unlikely)
1346  */
1347  t->segments[k]->index_duration = mxf->fc->streams[0]->duration;
1348  break;
1349  }
1350  }
1351 
1352  ret = 0;
1353 finish_decoding_index:
1354  av_free(sorted_segments);
1355  return ret;
1356 }
1357 
1359 {
1360  return mxf_get_codec_ul(mxf_intra_only_essence_container_uls,
1362  mxf_get_codec_ul(mxf_intra_only_picture_essence_coding_uls,
1364 }
1365 
1367 {
1368  MXFPackage *material_package = NULL;
1369  MXFPackage *temp_package = NULL;
1370  int i, j, k, ret;
1371 
1372  av_dlog(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
1373  /* TODO: handle multiple material packages (OP3x) */
1374  for (i = 0; i < mxf->packages_count; i++) {
1375  material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
1376  if (material_package) break;
1377  }
1378  if (!material_package) {
1379  av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
1380  return AVERROR_INVALIDDATA;
1381  }
1382 
1383  for (i = 0; i < material_package->tracks_count; i++) {
1384  MXFPackage *source_package = NULL;
1385  MXFTrack *material_track = NULL;
1386  MXFTrack *source_track = NULL;
1387  MXFTrack *temp_track = NULL;
1388  MXFDescriptor *descriptor = NULL;
1389  MXFStructuralComponent *component = NULL;
1390  UID *essence_container_ul = NULL;
1391  const MXFCodecUL *codec_ul = NULL;
1392  const MXFCodecUL *container_ul = NULL;
1393  const MXFCodecUL *pix_fmt_ul = NULL;
1394  AVStream *st;
1395 
1396  if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
1397  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
1398  continue;
1399  }
1400 
1401  if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
1402  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
1403  continue;
1404  }
1405 
1406  /* TODO: handle multiple source clips */
1407  for (j = 0; j < material_track->sequence->structural_components_count; j++) {
1408  /* TODO: handle timecode component */
1409  component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
1410  if (!component)
1411  continue;
1412 
1413  for (k = 0; k < mxf->packages_count; k++) {
1414  temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
1415  if (!temp_package)
1416  continue;
1417  if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
1418  source_package = temp_package;
1419  break;
1420  }
1421  }
1422  if (!source_package) {
1423  av_dlog(mxf->fc, "material track %d: no corresponding source package found\n", material_track->track_id);
1424  break;
1425  }
1426  for (k = 0; k < source_package->tracks_count; k++) {
1427  if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
1428  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
1429  ret = AVERROR_INVALIDDATA;
1430  goto fail_and_free;
1431  }
1432  if (temp_track->track_id == component->source_track_id) {
1433  source_track = temp_track;
1434  break;
1435  }
1436  }
1437  if (!source_track) {
1438  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
1439  break;
1440  }
1441  }
1442  if (!source_track || !component)
1443  continue;
1444 
1445  if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
1446  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
1447  ret = AVERROR_INVALIDDATA;
1448  goto fail_and_free;
1449  }
1450 
1451  /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 0001GL.MXF.V1.mxf_opatom.mxf
1452  * This would result in both files appearing to have two streams. Work around this by sanity checking DataDefinition */
1453  if (memcmp(material_track->sequence->data_definition_ul, source_track->sequence->data_definition_ul, 16)) {
1454  av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition mismatch\n", material_track->track_id);
1455  continue;
1456  }
1457 
1458  st = avformat_new_stream(mxf->fc, NULL);
1459  if (!st) {
1460  av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
1461  ret = AVERROR(ENOMEM);
1462  goto fail_and_free;
1463  }
1464  st->id = source_track->track_id;
1465  st->priv_data = source_track;
1466  source_track->original_duration = st->duration = component->duration;
1467  if (st->duration == -1)
1468  st->duration = AV_NOPTS_VALUE;
1469  st->start_time = component->start_position;
1470  if (material_track->edit_rate.num <= 0 ||
1471  material_track->edit_rate.den <= 0) {
1472  av_log(mxf->fc, AV_LOG_WARNING,
1473  "Invalid edit rate (%d/%d) found on stream #%d, "
1474  "defaulting to 25/1\n",
1475  material_track->edit_rate.num,
1476  material_track->edit_rate.den, st->index);
1477  material_track->edit_rate = (AVRational){25, 1};
1478  }
1479  avpriv_set_pts_info(st, 64, material_track->edit_rate.den, material_track->edit_rate.num);
1480 
1481  /* ensure SourceTrack EditRate == MaterialTrack EditRate since only
1482  * the former is accessible via st->priv_data */
1483  source_track->edit_rate = material_track->edit_rate;
1484 
1485  PRINT_KEY(mxf->fc, "data definition ul", source_track->sequence->data_definition_ul);
1487  st->codec->codec_type = codec_ul->id;
1488 
1489  source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
1490  if (source_package->descriptor) {
1491  if (source_package->descriptor->type == MultipleDescriptor) {
1492  for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
1493  MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
1494 
1495  if (!sub_descriptor) {
1496  av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
1497  continue;
1498  }
1499  if (sub_descriptor->linked_track_id == source_track->track_id) {
1500  descriptor = sub_descriptor;
1501  break;
1502  }
1503  }
1504  } else if (source_package->descriptor->type == Descriptor)
1505  descriptor = source_package->descriptor;
1506  }
1507  if (!descriptor) {
1508  av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
1509  continue;
1510  }
1511  PRINT_KEY(mxf->fc, "essence codec ul", descriptor->essence_codec_ul);
1512  PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
1513  essence_container_ul = &descriptor->essence_container_ul;
1514  /* HACK: replacing the original key with mxf_encrypted_essence_container
1515  * is not allowed according to s429-6, try to find correct information anyway */
1516  if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
1517  av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
1518  for (k = 0; k < mxf->metadata_sets_count; k++) {
1519  MXFMetadataSet *metadata = mxf->metadata_sets[k];
1520  if (metadata->type == CryptoContext) {
1521  essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
1522  break;
1523  }
1524  }
1525  }
1526 
1527  /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
1528  codec_ul = mxf_get_codec_ul(ff_mxf_codec_uls, &descriptor->essence_codec_ul);
1529  st->codec->codec_id = codec_ul->id;
1530 
1531  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
1532  source_track->intra_only = mxf_is_intra_only(descriptor);
1533  container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
1534  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1535  st->codec->codec_id = container_ul->id;
1536  st->codec->width = descriptor->width;
1537  /* Field height, not frame height */
1538  st->codec->height = descriptor->height;
1539  switch (descriptor->frame_layout) {
1540  case SegmentedFrame:
1541  /* This one is a weird layout I don't fully understand. */
1542  av_log(mxf->fc, AV_LOG_INFO,
1543  "SegmentedFrame layout isn't currently supported\n");
1544  break;
1545  case FullFrame:
1547  break;
1548  case OneField:
1549  /* Every other line is stored and needs to be duplicated. */
1550  av_log(mxf->fc, AV_LOG_INFO,
1551  "OneField frame layout isn't currently supported\n");
1552  break;
1553  /* The correct thing to do here is fall through, but by
1554  * breaking we might be able to decode some streams at half
1555  * the vertical resolution, rather than not al all.
1556  * It's also for compatibility with the old behavior. */
1557  case SeparateFields:
1558  case MixedFields:
1559  switch (descriptor->field_dominance) {
1560  case MXF_TFF:
1561  st->codec->field_order = AV_FIELD_TT;
1562  break;
1563  case MXF_BFF:
1564  st->codec->field_order = AV_FIELD_BB;
1565  break;
1566  default:
1568  "Field dominance %d support",
1569  descriptor->field_dominance);
1570  break;
1571  }
1572  /* Turn field height into frame height. */
1573  st->codec->height *= 2;
1574  break;
1575  default:
1576  av_log(mxf->fc, AV_LOG_INFO,
1577  "Unknown frame layout type: %d\n",
1578  descriptor->frame_layout);
1579  }
1580  if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO) {
1581  st->codec->pix_fmt = descriptor->pix_fmt;
1582  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1584  &descriptor->essence_codec_ul);
1585  st->codec->pix_fmt = pix_fmt_ul->id;
1586  if (st->codec->pix_fmt == AV_PIX_FMT_NONE) {
1587  /* support files created before RP224v10 by defaulting to UYVY422
1588  if subsampling is 4:2:2 and component depth is 8-bit */
1589  if (descriptor->horiz_subsampling == 2 &&
1590  descriptor->vert_subsampling == 1 &&
1591  descriptor->component_depth == 8) {
1593  }
1594  }
1595  }
1596  }
1598  if (material_track->sequence->origin) {
1599  char material_origin[3];
1600  snprintf(material_origin, sizeof(material_origin), "%d", material_track->sequence->origin);
1601  av_dict_set(&st->metadata, "material_track_origin", material_origin, 0);
1602  }
1603  if (source_track->sequence->origin) {
1604  char source_origin[3];
1605  snprintf(source_origin, sizeof(source_origin), "%d", source_track->sequence->origin);
1606  av_dict_set(&st->metadata, "source_track_origin", source_origin, 0);
1607  }
1608  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
1609  container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
1610  if (st->codec->codec_id == AV_CODEC_ID_NONE)
1611  st->codec->codec_id = container_ul->id;
1612  st->codec->channels = descriptor->channels;
1613  st->codec->bits_per_coded_sample = descriptor->bits_per_sample;
1614 
1615  if (descriptor->sample_rate.den > 0) {
1616  st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
1617  avpriv_set_pts_info(st, 64, descriptor->sample_rate.den, descriptor->sample_rate.num);
1618  } else {
1619  av_log(mxf->fc, AV_LOG_WARNING, "invalid sample rate (%d/%d) "
1620  "found for stream #%d, time base forced to 1/48000\n",
1621  descriptor->sample_rate.num, descriptor->sample_rate.den,
1622  st->index);
1623  avpriv_set_pts_info(st, 64, 1, 48000);
1624  }
1625 
1626  /* if duration is set, rescale it from EditRate to SampleRate */
1627  if (st->duration != AV_NOPTS_VALUE)
1628  st->duration = av_rescale_q(st->duration,
1629  av_inv_q(material_track->edit_rate),
1630  st->time_base);
1631 
1632  /* TODO: implement AV_CODEC_ID_RAWAUDIO */
1633  if (st->codec->codec_id == AV_CODEC_ID_PCM_S16LE) {
1634  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1636  else if (descriptor->bits_per_sample == 32)
1638  } else if (st->codec->codec_id == AV_CODEC_ID_PCM_S16BE) {
1639  if (descriptor->bits_per_sample > 16 && descriptor->bits_per_sample <= 24)
1641  else if (descriptor->bits_per_sample == 32)
1643  } else if (st->codec->codec_id == AV_CODEC_ID_MP2) {
1645  }
1646  } else if (st->codec->codec_type == AVMEDIA_TYPE_DATA) {
1647  int codec_id = mxf_get_codec_ul(mxf_data_essence_container_uls,
1648  essence_container_ul)->id;
1649  if (codec_id >= 0 &&
1650  codec_id < FF_ARRAY_ELEMS(mxf_data_essence_descriptor)) {
1651  av_dict_set(&st->metadata, "data_type",
1652  mxf_data_essence_descriptor[codec_id], 0);
1653  }
1654  }
1655  if (descriptor->extradata) {
1657  if (st->codec->extradata) {
1658  memcpy(st->codec->extradata, descriptor->extradata, descriptor->extradata_size);
1659  st->codec->extradata_size = descriptor->extradata_size;
1660  }
1661  } else if (st->codec->codec_id == AV_CODEC_ID_H264) {
1662  ret = ff_generate_avci_extradata(st);
1663  if (ret < 0)
1664  return ret;
1665  }
1666  if (st->codec->codec_type != AVMEDIA_TYPE_DATA && (*essence_container_ul)[15] > 0x01) {
1667  /* TODO: decode timestamps */
1669  }
1670  }
1671 
1672  ret = 0;
1673 fail_and_free:
1674  return ret;
1675 }
1676 
1677 static int mxf_read_utf16_string(AVIOContext *pb, int size, char** str)
1678 {
1679  int ret;
1680  size_t buf_size;
1681 
1682  if (size < 0)
1683  return AVERROR(EINVAL);
1684 
1685  buf_size = size + size / 2 + 1;
1686  *str = av_malloc(buf_size);
1687  if (!*str)
1688  return AVERROR(ENOMEM);
1689 
1690  if ((ret = avio_get_str16be(pb, size, *str, buf_size)) < 0) {
1691  av_freep(str);
1692  return ret;
1693  }
1694 
1695  return ret;
1696 }
1697 
1698 static int mxf_uid_to_str(UID uid, char **str)
1699 {
1700  int i;
1701  char *p;
1702  p = *str = av_mallocz(sizeof(UID) * 2 + 4 + 1);
1703  if (!p)
1704  return AVERROR(ENOMEM);
1705  for (i = 0; i < sizeof(UID); i++) {
1706  snprintf(p, 2 + 1, "%.2x", uid[i]);
1707  p += 2;
1708  if (i == 3 || i == 5 || i == 7 || i == 9) {
1709  snprintf(p, 1 + 1, "-");
1710  p++;
1711  }
1712  }
1713  return 0;
1714 }
1715 
1716 static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
1717 {
1718  struct tm time = { 0 };
1719  time.tm_year = (timestamp >> 48) - 1900;
1720  time.tm_mon = (timestamp >> 40 & 0xFF) - 1;
1721  time.tm_mday = (timestamp >> 32 & 0xFF);
1722  time.tm_hour = (timestamp >> 24 & 0xFF);
1723  time.tm_min = (timestamp >> 16 & 0xFF);
1724  time.tm_sec = (timestamp >> 8 & 0xFF);
1725 
1726  /* msvcrt versions of strftime calls the invalid parameter handler
1727  * (aborting the process if one isn't set) if the parameters are out
1728  * of range. */
1729  time.tm_mon = av_clip(time.tm_mon, 0, 11);
1730  time.tm_mday = av_clip(time.tm_mday, 1, 31);
1731  time.tm_hour = av_clip(time.tm_hour, 0, 23);
1732  time.tm_min = av_clip(time.tm_min, 0, 59);
1733  time.tm_sec = av_clip(time.tm_sec, 0, 59);
1734 
1735  *str = av_mallocz(32);
1736  if (!*str)
1737  return AVERROR(ENOMEM);
1738  strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
1739 
1740  return 0;
1741 }
1742 
1743 #define SET_STR_METADATA(pb, name, str) do { \
1744  if ((ret = mxf_read_utf16_string(pb, size, &str)) < 0) \
1745  return ret; \
1746  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1747 } while (0)
1748 
1749 #define SET_UID_METADATA(pb, name, var, str) do { \
1750  avio_read(pb, var, 16); \
1751  if ((ret = mxf_uid_to_str(var, &str)) < 0) \
1752  return ret; \
1753  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1754 } while (0)
1755 
1756 #define SET_TS_METADATA(pb, name, var, str) do { \
1757  var = avio_rb64(pb); \
1758  if ((ret = mxf_timestamp_to_str(var, &str)) < 0) \
1759  return ret; \
1760  av_dict_set(&s->metadata, name, str, AV_DICT_DONT_STRDUP_VAL); \
1761 } while (0)
1762 
1763 static int mxf_read_identification_metadata(void *arg, AVIOContext *pb, int tag, int size, UID _uid, int64_t klv_offset)
1764 {
1765  MXFContext *mxf = arg;
1766  AVFormatContext *s = mxf->fc;
1767  int ret;
1768  UID uid = { 0 };
1769  char *str = NULL;
1770  uint64_t ts;
1771  switch (tag) {
1772  case 0x3C01:
1773  SET_STR_METADATA(pb, "company_name", str);
1774  break;
1775  case 0x3C02:
1776  SET_STR_METADATA(pb, "product_name", str);
1777  break;
1778  case 0x3C04:
1779  SET_STR_METADATA(pb, "product_version", str);
1780  break;
1781  case 0x3C05:
1782  SET_UID_METADATA(pb, "product_uid", uid, str);
1783  break;
1784  case 0x3C06:
1785  SET_TS_METADATA(pb, "modification_date", ts, str);
1786  break;
1787  case 0x3C08:
1788  SET_STR_METADATA(pb, "application_platform", str);
1789  break;
1790  case 0x3C09:
1791  SET_UID_METADATA(pb, "generation_uid", uid, str);
1792  break;
1793  case 0x3C0A:
1794  SET_UID_METADATA(pb, "uid", uid, str);
1795  break;
1796  }
1797  return 0;
1798 }
1799 
1801  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x05,0x01,0x00 }, mxf_read_primer_pack },
1802 // { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x2f,0x00 }, mxf_read_preface_pack },
1803  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x01,0x00 }, mxf_read_partition_pack },
1804  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x02,0x00 }, mxf_read_partition_pack },
1805  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x03,0x00 }, mxf_read_partition_pack },
1806  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02,0x04,0x00 }, mxf_read_partition_pack },
1807  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x01,0x00 }, mxf_read_partition_pack },
1808  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x02,0x00 }, mxf_read_partition_pack },
1809  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x03,0x00 }, mxf_read_partition_pack },
1810  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x03,0x04,0x00 }, mxf_read_partition_pack },
1811  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x02,0x00 }, mxf_read_partition_pack },
1812  { { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x04,0x04,0x00 }, mxf_read_partition_pack },
1813  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x30,0x00 }, mxf_read_identification_metadata },
1814  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_content_storage, 0, AnyType },
1815  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_source_package, sizeof(MXFPackage), SourcePackage },
1816  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_material_package, sizeof(MXFPackage), MaterialPackage },
1817  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_sequence, sizeof(MXFSequence), Sequence },
1818  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_source_clip, sizeof(MXFStructuralComponent), SourceClip },
1819  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
1820  { { 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 */
1821  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
1822  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
1823  { { 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 */
1824  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
1825  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
1826  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2VideoDescriptor */
1827  { { 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 */
1828  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x5e,0x00 }, mxf_read_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG2AudioDescriptor */
1829  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
1830  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
1831  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
1832  { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
1833  { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
1834 };
1835 
1836 static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
1837 {
1838  AVIOContext *pb = mxf->fc->pb;
1839  MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
1840  uint64_t klv_end = avio_tell(pb) + klv->length;
1841 
1842  if (!ctx)
1843  return AVERROR(ENOMEM);
1844  while (avio_tell(pb) + 4 < klv_end && !pb->eof_reached) {
1845  int ret;
1846  int tag = avio_rb16(pb);
1847  int size = avio_rb16(pb); /* KLV specified by 0x53 */
1848  uint64_t next = avio_tell(pb) + size;
1849  UID uid = {0};
1850 
1851  av_dlog(mxf->fc, "local tag %#04x size %d\n", tag, size);
1852  if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
1853  av_log(mxf->fc, AV_LOG_ERROR, "local tag %#04x with 0 size\n", tag);
1854  continue;
1855  }
1856  if (tag > 0x7FFF) { /* dynamic tag */
1857  int i;
1858  for (i = 0; i < mxf->local_tags_count; i++) {
1859  int local_tag = AV_RB16(mxf->local_tags+i*18);
1860  if (local_tag == tag) {
1861  memcpy(uid, mxf->local_tags+i*18+2, 16);
1862  av_dlog(mxf->fc, "local tag %#04x\n", local_tag);
1863  PRINT_KEY(mxf->fc, "uid", uid);
1864  }
1865  }
1866  }
1867  if (ctx_size && tag == 0x3C0A)
1868  avio_read(pb, ctx->uid, 16);
1869  else if ((ret = read_child(ctx, pb, tag, size, uid, -1)) < 0)
1870  return ret;
1871 
1872  /* Accept the 64k local set limit being exceeded (Avid). Don't accept
1873  * it extending past the end of the KLV though (zzuf5.mxf). */
1874  if (avio_tell(pb) > klv_end) {
1875  if (ctx_size)
1876  av_free(ctx);
1877 
1878  av_log(mxf->fc, AV_LOG_ERROR,
1879  "local tag %#04x extends past end of local set @ %#"PRIx64"\n",
1880  tag, klv->offset);
1881  return AVERROR_INVALIDDATA;
1882  } else if (avio_tell(pb) <= next) /* only seek forward, else this can loop for a long time */
1883  avio_seek(pb, next, SEEK_SET);
1884  }
1885  if (ctx_size) ctx->type = type;
1886  return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
1887 }
1888 
1894 {
1895  AVIOContext *pb = mxf->fc->pb;
1896 
1897  if (!mxf->current_partition ||
1899  return 0; /* we've parsed all partitions */
1900 
1901  /* seek to previous partition */
1902  avio_seek(pb, mxf->run_in + mxf->current_partition->previous_partition, SEEK_SET);
1903  mxf->current_partition = NULL;
1904 
1905  av_dlog(mxf->fc, "seeking to previous partition\n");
1906 
1907  return 1;
1908 }
1909 
1915 {
1916  AVIOContext *pb = mxf->fc->pb;
1917  int64_t ret;
1918 
1919  if (mxf->parsing_backward) {
1920  return mxf_seek_to_previous_partition(mxf);
1921  } else {
1922  uint64_t offset = mxf->footer_partition ? mxf->footer_partition
1923  : mxf->last_partition;
1924 
1925  if (!offset) {
1926  av_dlog(mxf->fc, "no last partition\n");
1927  return 0;
1928  }
1929 
1930  av_dlog(mxf->fc, "seeking to last partition\n");
1931 
1932  /* remember where we were so we don't end up seeking further back than this */
1933  mxf->last_forward_tell = avio_tell(pb);
1934 
1935  if (!pb->seekable) {
1936  av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
1937  return -1;
1938  }
1939 
1940  /* seek to last partition and parse backward */
1941  if ((ret = avio_seek(pb, mxf->run_in + offset, SEEK_SET)) < 0) {
1942  av_log(mxf->fc, AV_LOG_ERROR,
1943  "failed to seek to last partition @ 0x%" PRIx64
1944  " (%"PRId64") - partial file?\n",
1945  mxf->run_in + offset, ret);
1946  return ret;
1947  }
1948 
1949  mxf->current_partition = NULL;
1950  mxf->parsing_backward = 1;
1951  }
1952 
1953  return 1;
1954 }
1955 
1961 {
1962  return mxf->parsing_backward ? mxf_seek_to_previous_partition(mxf) : 1;
1963 }
1964 
1970 {
1971  int x;
1972 
1973  /* everything is already correct */
1974  if (mxf->op == OPAtom)
1975  return;
1976 
1977  for (x = 0; x < mxf->partitions_count; x++) {
1978  MXFPartition *p = &mxf->partitions[x];
1979 
1980  if (!p->body_sid)
1981  continue; /* BodySID == 0 -> no essence */
1982 
1983  if (x >= mxf->partitions_count - 1)
1984  break; /* last partition - can't compute length (and we don't need to) */
1985 
1986  /* essence container spans to the next partition */
1988 
1989  if (p->essence_length < 0) {
1990  /* next ThisPartition < essence_offset */
1991  p->essence_length = 0;
1992  av_log(mxf->fc, AV_LOG_ERROR,
1993  "partition %i: bad ThisPartition = %"PRIX64"\n",
1994  x+1, mxf->partitions[x+1].this_partition);
1995  }
1996  }
1997 }
1998 
1999 static int64_t round_to_kag(int64_t position, int kag_size)
2000 {
2001  /* TODO: account for run-in? the spec isn't clear whether KAG should account for it */
2002  /* NOTE: kag_size may be any integer between 1 - 2^10 */
2003  int64_t ret = (position / kag_size) * kag_size;
2004  return ret == position ? ret : ret + kag_size;
2005 }
2006 
2008  MXFContext *mxf,
2009  KLVPacket *klv)
2010 {
2011  MXFPartition *cur_part = mxf->current_partition;
2012  /* for OP1a we compute essence_offset
2013  * for OPAtom we point essence_offset after the KL
2014  * (usually op1a_essence_offset + 20 or 25)
2015  * TODO: for OP1a we could eliminate this entire if statement, always
2016  * stopping parsing at op1a_essence_offset
2017  * for OPAtom we still need the actual essence_offset though
2018  * (the KL's length can vary)
2019  */
2020  int64_t op1a_essence_offset =
2021  round_to_kag(cur_part->this_partition + cur_part->pack_length,
2022  cur_part->kag_size) +
2023  round_to_kag(cur_part->header_byte_count, cur_part->kag_size) +
2024  round_to_kag(cur_part->index_byte_count, cur_part->kag_size);
2025 
2026  if (mxf->op == OPAtom) {
2027  /* point essence_offset to the actual data
2028  * OPAtom has all the essence in one big KLV
2029  */
2030  cur_part->essence_offset = avio_tell(s->pb);
2031  cur_part->essence_length = klv->length;
2032  } else {
2033  /* NOTE: op1a_essence_offset may be less than to klv.offset
2034  * (C0023S01.mxf) */
2035  cur_part->essence_offset = op1a_essence_offset;
2036  }
2037 }
2038 
2039 static int is_pcm(enum AVCodecID codec_id)
2040 {
2041  /* we only care about "normal" PCM codecs until we get samples */
2042  return codec_id >= AV_CODEC_ID_PCM_S16LE && codec_id < AV_CODEC_ID_PCM_S24DAUD;
2043 }
2044 
2051 {
2052  MXFContext *mxf = s->priv_data;
2053 
2054  /* assuming non-OPAtom == frame wrapped
2055  * no sane writer would wrap 2 byte PCM packets with 20 byte headers.. */
2056  if (mxf->op != OPAtom)
2057  return;
2058 
2059  /* expect PCM with exactly one index table segment and a small (< 32) EUBC */
2060  if (s->nb_streams != 1 ||
2062  !is_pcm(s->streams[0]->codec->codec_id) ||
2063  mxf->nb_index_tables != 1 ||
2064  mxf->index_tables[0].nb_segments != 1 ||
2065  mxf->index_tables[0].segments[0]->edit_unit_byte_count >= 32)
2066  return;
2067 
2068  /* arbitrarily default to 48 kHz PAL audio frame size */
2069  /* TODO: We could compute this from the ratio between the audio
2070  * and video edit rates for 48 kHz NTSC we could use the
2071  * 1802-1802-1802-1802-1801 pattern. */
2072  mxf->edit_units_per_packet = 1920;
2073 }
2074 
2076 {
2077  MXFContext *mxf = s->priv_data;
2078  uint32_t length;
2079  int64_t file_size;
2080  KLVPacket klv;
2081 
2082  if (!s->pb->seekable)
2083  return;
2084 
2085  file_size = avio_size(s->pb);
2086  avio_seek(s->pb, file_size - 4, SEEK_SET);
2087  length = avio_rb32(s->pb);
2088  if (length <= 32 || length >= FFMIN(file_size, INT_MAX))
2089  goto end;
2090  avio_seek(s->pb, file_size - length, SEEK_SET);
2091  if (klv_read_packet(&klv, s->pb) < 0 ||
2093  klv.length != length - 20)
2094  goto end;
2095 
2096  avio_skip(s->pb, klv.length - 12);
2097  mxf->last_partition = avio_rb64(s->pb);
2098 
2099 end:
2100  avio_seek(s->pb, mxf->run_in, SEEK_SET);
2101 }
2102 
2104 {
2105  MXFContext *mxf = s->priv_data;
2106  KLVPacket klv;
2107  int64_t essence_offset = 0;
2108  int ret;
2109 
2110  mxf->last_forward_tell = INT64_MAX;
2111  mxf->edit_units_per_packet = 1;
2112 
2114  av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
2115  return AVERROR_INVALIDDATA;
2116  }
2117  avio_seek(s->pb, -14, SEEK_CUR);
2118  mxf->fc = s;
2119  mxf->run_in = avio_tell(s->pb);
2120 
2122 
2123  while (!s->pb->eof_reached) {
2124 
2125  const MXFMetadataReadTableEntry *metadata;
2126 
2127  if (klv_read_packet(&klv, s->pb) < 0) {
2128  /* EOF - seek to previous partition or stop */
2129  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2130  break;
2131  else
2132  continue;
2133  }
2134 
2135  PRINT_KEY(s, "read header", klv.key);
2136  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2141 
2142  if (!mxf->current_partition) {
2143  av_log(mxf->fc, AV_LOG_ERROR,
2144  "found essence prior to first PartitionPack\n");
2145  return AVERROR_INVALIDDATA;
2146  }
2147 
2148  if (!mxf->current_partition->essence_offset) {
2149  compute_partition_essence_offset(s, mxf, &klv);
2150  }
2151 
2152  if (!essence_offset)
2153  essence_offset = klv.offset;
2154 
2155  /* seek to footer, previous partition or stop */
2156  if (mxf_parse_handle_essence(mxf) <= 0)
2157  break;
2158  continue;
2159  } else if (!memcmp(klv.key, mxf_header_partition_pack_key, 13) &&
2160  klv.key[13] >= 2 && klv.key[13] <= 4 && mxf->current_partition) {
2161  /* next partition pack - keep going, seek to previous partition or stop */
2162  if(mxf_parse_handle_partition_or_eof(mxf) <= 0)
2163  break;
2164  else if (mxf->parsing_backward)
2165  continue;
2166  /* we're still parsing forward. proceed to parsing this partition pack */
2167  }
2168 
2169  for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
2170  if (IS_KLV_KEY(klv.key, metadata->key)) {
2171  int res;
2172  if (klv.key[5] == 0x53) {
2173  res = mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type);
2174  } else {
2175  uint64_t next = avio_tell(s->pb) + klv.length;
2176  res = metadata->read(mxf, s->pb, 0, klv.length, klv.key, klv.offset);
2177 
2178  /* only seek forward, else this can loop for a long time */
2179  if (avio_tell(s->pb) > next) {
2180  av_log(s, AV_LOG_ERROR, "read past end of KLV @ %#"PRIx64"\n",
2181  klv.offset);
2182  return AVERROR_INVALIDDATA;
2183  }
2184 
2185  avio_seek(s->pb, next, SEEK_SET);
2186  }
2187  if (res < 0) {
2188  av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
2189  return res;
2190  }
2191  break;
2192  } else {
2193  av_log(s, AV_LOG_VERBOSE, "Dark key " PRIxUID "\n",
2194  UID_ARG(klv.key));
2195  }
2196  }
2197  if (!metadata->read)
2198  avio_skip(s->pb, klv.length);
2199  }
2200  /* FIXME avoid seek */
2201  if (!essence_offset) {
2202  av_log(s, AV_LOG_ERROR, "no essence\n");
2203  return AVERROR_INVALIDDATA;
2204  }
2205  avio_seek(s->pb, essence_offset, SEEK_SET);
2206 
2208 
2209  /* we need to do this before computing the index tables
2210  * to be able to fill in zero IndexDurations with st->duration */
2211  if ((ret = mxf_parse_structural_metadata(mxf)) < 0)
2212  return ret;
2213 
2214  if ((ret = mxf_compute_index_tables(mxf)) < 0)
2215  return ret;
2216 
2217  if (mxf->nb_index_tables > 1) {
2218  /* TODO: look up which IndexSID to use via EssenceContainerData */
2219  av_log(mxf->fc, AV_LOG_INFO, "got %i index tables - only the first one (IndexSID %i) will be used\n",
2220  mxf->nb_index_tables, mxf->index_tables[0].index_sid);
2221  } else if (mxf->nb_index_tables == 0 && mxf->op == OPAtom) {
2222  av_log(mxf->fc, AV_LOG_ERROR, "cannot demux OPAtom without an index\n");
2223  return AVERROR_INVALIDDATA;
2224  }
2225 
2227 
2228  return 0;
2229 }
2230 
2235 static int64_t mxf_set_current_edit_unit(MXFContext *mxf, int64_t current_offset)
2236 {
2237  int64_t last_ofs = -1, next_ofs = -1;
2238  MXFIndexTable *t = &mxf->index_tables[0];
2239 
2240  /* this is called from the OP1a demuxing logic, which means there
2241  * may be no index tables */
2242  if (mxf->nb_index_tables <= 0)
2243  return -1;
2244 
2245  /* find mxf->current_edit_unit so that the next edit unit starts ahead
2246  * of current_offset */
2247  while (mxf->current_edit_unit >= 0) {
2248  if (mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + 1,
2249  NULL, &next_ofs, 0) < 0)
2250  return -1;
2251 
2252  if (next_ofs <= last_ofs) {
2253  /* large next_ofs didn't change or current_edit_unit wrapped
2254  * around this fixes the infinite loop on zzuf3.mxf */
2255  av_log(mxf->fc, AV_LOG_ERROR,
2256  "next_ofs didn't change. not deriving packet timestamps\n");
2257  return -1;
2258  }
2259 
2260  if (next_ofs > current_offset)
2261  break;
2262 
2263  last_ofs = next_ofs;
2264  mxf->current_edit_unit++;
2265  }
2266 
2267  /* not checking mxf->current_edit_unit >= t->nb_ptses here since CBR files
2268  * may lack IndexEntryArrays */
2269  if (mxf->current_edit_unit < 0)
2270  return -1;
2271 
2272  return next_ofs;
2273 }
2274 
2275 static int mxf_compute_sample_count(MXFContext *mxf, int stream_index,
2276  uint64_t *sample_count)
2277 {
2278  int i, total = 0, size = 0;
2279  AVStream *st = mxf->fc->streams[stream_index];
2280  MXFTrack *track = st->priv_data;
2281  AVRational time_base = av_inv_q(track->edit_rate);
2282  AVRational sample_rate = av_inv_q(st->time_base);
2283  const MXFSamplesPerFrame *spf = NULL;
2284 
2285  if ((sample_rate.num / sample_rate.den) == 48000)
2286  spf = ff_mxf_get_samples_per_frame(mxf->fc, time_base);
2287  if (!spf) {
2288  int remainder = (sample_rate.num * time_base.num) %
2289  (time_base.den * sample_rate.den);
2290  *sample_count = av_q2d(av_mul_q((AVRational){mxf->current_edit_unit, 1},
2291  av_mul_q(sample_rate, time_base)));
2292  if (remainder)
2293  av_log(mxf->fc, AV_LOG_WARNING,
2294  "seeking detected on stream #%d with time base (%d/%d) and "
2295  "sample rate (%d/%d), audio pts won't be accurate.\n",
2296  stream_index, time_base.num, time_base.den,
2297  sample_rate.num, sample_rate.den);
2298  return 0;
2299  }
2300 
2301  while (spf->samples_per_frame[size]) {
2302  total += spf->samples_per_frame[size];
2303  size++;
2304  }
2305 
2306  if (!size)
2307  return 0;
2308 
2309  *sample_count = (mxf->current_edit_unit / size) * (uint64_t)total;
2310  for (i = 0; i < mxf->current_edit_unit % size; i++) {
2311  *sample_count += spf->samples_per_frame[i];
2312  }
2313 
2314  return 0;
2315 }
2316 
2318  AVPacket *pkt)
2319 {
2320  MXFTrack *track = mxf->fc->streams[pkt->stream_index]->priv_data;
2321  int64_t bits_per_sample = codec->bits_per_coded_sample;
2322 
2323  if (!bits_per_sample)
2324  bits_per_sample = av_get_bits_per_sample(codec->codec_id);
2325 
2326  pkt->pts = track->sample_count;
2327 
2328  if (codec->channels <= 0 || codec->channels * bits_per_sample < 8)
2329  return AVERROR_INVALIDDATA;
2330 
2331  track->sample_count += pkt->size / (codec->channels * bits_per_sample / 8);
2332  return 0;
2333 }
2334 
2336 {
2337  KLVPacket klv;
2338  MXFContext *mxf = s->priv_data;
2339  int ret;
2340 
2341  while (!s->pb->eof_reached) {
2342  if ((ret = klv_read_packet(&klv, s->pb)) < 0)
2343  return ret;
2344  PRINT_KEY(s, "read packet", klv.key);
2345  av_dlog(s, "size %"PRIu64" offset %#"PRIx64"\n", klv.length, klv.offset);
2347  ret = mxf_decrypt_triplet(s, pkt, &klv);
2348  if (ret < 0) {
2349  av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
2350  return ret;
2351  }
2352  return 0;
2353  }
2356  int index = mxf_get_stream_index(s, &klv);
2357  int64_t next_ofs, next_klv;
2358  AVStream *st;
2359  MXFTrack *track;
2360  AVCodecContext *codec;
2361 
2362  if (index < 0) {
2363  av_log(s, AV_LOG_ERROR,
2364  "error getting stream index %"PRIu32"\n",
2365  AV_RB32(klv.key + 12));
2366  goto skip;
2367  }
2368 
2369  st = s->streams[index];
2370  track = st->priv_data;
2371 
2372  if (s->streams[index]->discard == AVDISCARD_ALL)
2373  goto skip;
2374 
2375  next_klv = avio_tell(s->pb) + klv.length;
2376  next_ofs = mxf_set_current_edit_unit(mxf, klv.offset);
2377 
2378  if (next_ofs >= 0 && next_klv > next_ofs) {
2379  /* if this check is hit then it's possible OPAtom was treated
2380  * as OP1a truncate the packet since it's probably very large
2381  * (>2 GiB is common) */
2383  "OPAtom misinterpreted as OP1a?"
2384  "KLV for edit unit %i extending into "
2385  "next edit unit",
2386  mxf->current_edit_unit);
2387  klv.length = next_ofs - avio_tell(s->pb);
2388  }
2389 
2390  /* check for 8 channels AES3 element */
2391  if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
2392  ret = mxf_get_d10_aes3_packet(s->pb, s->streams[index],
2393  pkt, klv.length);
2394  if (ret < 0) {
2395  av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
2396  return ret;
2397  }
2398  } else {
2399  ret = av_get_packet(s->pb, pkt, klv.length);
2400  if (ret < 0)
2401  return ret;
2402  }
2403  pkt->stream_index = index;
2404  pkt->pos = klv.offset;
2405 
2406  codec = s->streams[index]->codec;
2407 
2408  if (codec->codec_type == AVMEDIA_TYPE_VIDEO && next_ofs >= 0) {
2409  /* mxf->current_edit_unit good - see if we have an
2410  * index table to derive timestamps from */
2411  MXFIndexTable *t = &mxf->index_tables[0];
2412 
2413  if (mxf->nb_index_tables >= 1 &&
2414  mxf->current_edit_unit < t->nb_ptses) {
2415  pkt->dts = mxf->current_edit_unit + t->first_dts;
2416  pkt->pts = t->ptses[mxf->current_edit_unit];
2417  } else if (track->intra_only) {
2418  /* intra-only -> PTS = EditUnit.
2419  * let utils.c figure out DTS since it can be
2420  * < PTS if low_delay = 0 (Sony IMX30) */
2421  pkt->pts = mxf->current_edit_unit;
2422  }
2423  } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2424  ret = mxf_set_audio_pts(mxf, codec, pkt);
2425  if (ret < 0)
2426  return ret;
2427  }
2428 
2429  /* seek for truncated packets */
2430  avio_seek(s->pb, next_klv, SEEK_SET);
2431 
2432  return 0;
2433  } else
2434  skip:
2435  avio_skip(s->pb, klv.length);
2436  }
2437  return AVERROR_EOF;
2438 }
2439 
2441 {
2442  MXFContext *mxf = s->priv_data;
2443  int ret, size;
2444  int64_t ret64, pos, next_pos;
2445  AVStream *st;
2446  MXFIndexTable *t;
2447  int edit_units;
2448 
2449  if (mxf->op != OPAtom)
2450  return mxf_read_packet_old(s, pkt);
2451 
2452  /* OPAtom - clip wrapped demuxing */
2453  /* NOTE: mxf_read_header() makes sure nb_index_tables > 0 for OPAtom */
2454  st = s->streams[0];
2455  t = &mxf->index_tables[0];
2456 
2457  if (mxf->current_edit_unit >= st->duration)
2458  return AVERROR_EOF;
2459 
2460  edit_units = FFMIN(mxf->edit_units_per_packet, st->duration - mxf->current_edit_unit);
2461 
2462  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit, NULL, &pos, 1)) < 0)
2463  return ret;
2464 
2465  /* compute size by finding the next edit unit or the end of the essence container
2466  * not pretty, but it works */
2467  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, mxf->current_edit_unit + edit_units, NULL, &next_pos, 0)) < 0 &&
2468  (next_pos = mxf_essence_container_end(mxf, t->body_sid)) <= 0) {
2469  av_log(s, AV_LOG_ERROR, "unable to compute the size of the last packet\n");
2470  return AVERROR_INVALIDDATA;
2471  }
2472 
2473  if ((size = next_pos - pos) <= 0) {
2474  av_log(s, AV_LOG_ERROR, "bad size: %i\n", size);
2475  return AVERROR_INVALIDDATA;
2476  }
2477 
2478  if ((ret64 = avio_seek(s->pb, pos, SEEK_SET)) < 0)
2479  return ret64;
2480 
2481  if ((ret = av_get_packet(s->pb, pkt, size)) != size)
2482  return ret < 0 ? ret : AVERROR_EOF;
2483 
2484  pkt->stream_index = 0;
2485 
2486  if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && t->ptses &&
2487  mxf->current_edit_unit >= 0 && mxf->current_edit_unit < t->nb_ptses) {
2488  pkt->dts = mxf->current_edit_unit + t->first_dts;
2489  pkt->pts = t->ptses[mxf->current_edit_unit];
2490  } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2491  int ret = mxf_set_audio_pts(mxf, st->codec, pkt);
2492  if (ret < 0)
2493  return ret;
2494  }
2495 
2496  mxf->current_edit_unit += edit_units;
2497 
2498  return 0;
2499 }
2500 
2501 
2503 {
2504  MXFContext *mxf = s->priv_data;
2505  MXFIndexTableSegment *seg;
2506  int i;
2507 
2508  av_freep(&mxf->packages_refs);
2509 
2510  for (i = 0; i < s->nb_streams; i++)
2511  s->streams[i]->priv_data = NULL;
2512 
2513  for (i = 0; i < mxf->metadata_sets_count; i++) {
2514  switch (mxf->metadata_sets[i]->type) {
2515  case Descriptor:
2516  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->extradata);
2517  break;
2518  case MultipleDescriptor:
2519  av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
2520  break;
2521  case Sequence:
2522  av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
2523  break;
2524  case SourcePackage:
2525  case MaterialPackage:
2526  av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
2527  break;
2528  case IndexTableSegment:
2529  seg = (MXFIndexTableSegment *)mxf->metadata_sets[i];
2531  av_freep(&seg->flag_entries);
2533  break;
2534  default:
2535  break;
2536  }
2537  av_freep(&mxf->metadata_sets[i]);
2538  }
2539  av_freep(&mxf->partitions);
2540  av_freep(&mxf->metadata_sets);
2541  av_freep(&mxf->aesc);
2542  av_freep(&mxf->local_tags);
2543 
2544  for (i = 0; i < mxf->nb_index_tables; i++) {
2545  av_freep(&mxf->index_tables[i].segments);
2546  av_freep(&mxf->index_tables[i].ptses);
2547  av_freep(&mxf->index_tables[i].fake_index);
2548  }
2549  av_freep(&mxf->index_tables);
2550 
2551  return 0;
2552 }
2553 
2554 static int mxf_probe(AVProbeData *p) {
2555  uint8_t *bufp = p->buf;
2556  uint8_t *end = p->buf + p->buf_size;
2557 
2558  if (p->buf_size < sizeof(mxf_header_partition_pack_key))
2559  return 0;
2560 
2561  /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
2562  end -= sizeof(mxf_header_partition_pack_key);
2563  for (; bufp < end; bufp++) {
2565  return AVPROBE_SCORE_MAX;
2566  }
2567  return 0;
2568 }
2569 
2570 /* rudimentary byte seek */
2571 /* XXX: use MXF Index */
2572 static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
2573 {
2574  AVStream *st = s->streams[stream_index];
2575  int64_t seconds;
2576  MXFContext* mxf = s->priv_data;
2577  int64_t seekpos;
2578  int i, ret;
2579  MXFIndexTable *t;
2580  MXFTrack *source_track = st->priv_data;
2581 
2582  /* if audio then truncate sample_time to EditRate */
2583  if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
2584  sample_time = av_rescale_q(sample_time, st->time_base,
2585  av_inv_q(source_track->edit_rate));
2586 
2587  if (mxf->nb_index_tables <= 0) {
2588  if (!s->bit_rate)
2589  return AVERROR_INVALIDDATA;
2590  if (sample_time < 0)
2591  sample_time = 0;
2592  seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
2593 
2594  seekpos = avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
2595  if (seekpos < 0)
2596  return seekpos;
2597 
2598  ff_update_cur_dts(s, st, sample_time);
2599  mxf->current_edit_unit = sample_time;
2600  } else {
2601  t = &mxf->index_tables[0];
2602 
2603  /* clamp above zero, else ff_index_search_timestamp() returns negative
2604  * this also means we allow seeking before the start */
2605  sample_time = FFMAX(sample_time, 0);
2606 
2607  if (t->fake_index) {
2608  /* behave as if we have a proper index */
2609  if ((sample_time = ff_index_search_timestamp(t->fake_index, t->nb_ptses, sample_time, flags)) < 0)
2610  return sample_time;
2611  } else {
2612  /* no IndexEntryArray (one or more CBR segments)
2613  * make sure we don't seek past the end */
2614  sample_time = FFMIN(sample_time, source_track->original_duration - 1);
2615  }
2616 
2617  if ((ret = mxf_edit_unit_absolute_offset(mxf, t, sample_time, &sample_time, &seekpos, 1)) << 0)
2618  return ret;
2619 
2620  ff_update_cur_dts(s, st, sample_time);
2621  mxf->current_edit_unit = sample_time;
2622  avio_seek(s->pb, seekpos, SEEK_SET);
2623  }
2624 
2625  // Update all tracks sample count
2626  for (i = 0; i < s->nb_streams; i++) {
2627  AVStream *cur_st = s->streams[i];
2628  MXFTrack *cur_track = cur_st->priv_data;
2629  uint64_t current_sample_count = 0;
2630  if (cur_st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
2631  ret = mxf_compute_sample_count(mxf, i, &current_sample_count);
2632  if (ret < 0)
2633  return ret;
2634 
2635  cur_track->sample_count = current_sample_count;
2636  }
2637  }
2638  return 0;
2639 }
2640 
2642  .name = "mxf",
2643  .long_name = NULL_IF_CONFIG_SMALL("MXF (Material eXchange Format)"),
2644  .priv_data_size = sizeof(MXFContext),
2645  .read_probe = mxf_probe,
2650 };
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:1969
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:1366
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:772
Definition: mxf.h:38
static const MXFMetadataReadTableEntry mxf_metadata_read_table[]
Definition: mxfdec.c:1800
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:1893
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:2554
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:2075
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:1756
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:2572
static int mxf_uid_to_str(UID uid, char **str)
Definition: mxfdec.c:1698
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:580
#define sample
static int mxf_read_header(AVFormatContext *s)
Definition: mxfdec.c:2103
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:1960
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadFunc *read_child, int ctx_size, enum MXFMetadataSetType type)
Definition: mxfdec.c:1836
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mxfdec.c:2440
Format I/O context.
Definition: avformat.h:922
Definition: mxfdec.c:65
static int is_pcm(enum AVCodecID codec_id)
Definition: mxfdec.c:2039
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:595
#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:2502
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:1057
int complete
Definition: mxfdec.c:77
static void compute_partition_essence_offset(AVFormatContext *s, MXFContext *mxf, KLVPacket *klv)
Definition: mxfdec.c:2007
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:1266
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:660
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:957
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:452
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:988
uint8_t track_number[4]
Definition: mxfdec.c:123
static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
Definition: mxfdec.c:1716
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:1749
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:809
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:1107
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:963
Definition: mxf.h:53
uint64_t length
Definition: mxf.h:61
static const MXFCodecUL mxf_sound_essence_container_uls[]
Definition: mxfdec.c:969
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:1914
#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:1999
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:913
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:443
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:923
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:933
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:1677
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:1763
static const char * mxf_data_essence_descriptor[]
Definition: mxfdec.c:984
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:2050
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:828
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:979
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:1358
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:948
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:2317
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:2641
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:1155
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:1086
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:1743
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:2235
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:2335
static int mxf_compute_sample_count(MXFContext *mxf, int stream_index, uint64_t *sample_count)
Definition: mxfdec.c:2275
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
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