void XMPMetadataSource::loadReference(const MetaString& thisRefPath, const shared_ptr<Metadata>& md, MetadataStream& stream)
{
XMP_Int64 id;
MetaString tmpPath;
MetaString refName;
SXMPUtils::ComposeStructFieldPath(VMF_NS, thisRefPath.c_str(), VMF_NS, REF_NAME, &tmpPath);
if (!xmp->GetProperty(VMF_NS, tmpPath.c_str(), &refName, nullptr))
refName = "";
SXMPUtils::ComposeStructFieldPath(VMF_NS, thisRefPath.c_str(), VMF_NS, REF_ID, &tmpPath);
if (!xmp->GetProperty_Int64(VMF_NS, tmpPath.c_str(), &id, nullptr))
{
VMF_EXCEPTION(DataStorageException, "Broken reference by path" + thisRefPath);
}
IdType realId = id;
shared_ptr<Metadata> refTo = stream.getById(realId);
if (!refTo)
{
auto it = idMap.find(realId);
if (it == idMap.end())
{
VMF_EXCEPTION(DataStorageException, "Undefined reference by path " + thisRefPath);
}
InternalPath path = it->second;
std::shared_ptr<MetadataSchema> refSchemaDesc = stream.getSchema(path.schema);
std::shared_ptr<MetadataDesc> refMetadataDesc = refSchemaDesc->findMetadataDesc(path.metadata);
loadMetadata(path.path, refMetadataDesc, stream);
refTo = stream.getById(realId);
}
md->addReference(refTo, refName);
}
std::shared_ptr<Metadata> MetadataStream::import( MetadataStream& srcStream, std::shared_ptr< Metadata >& spMetadata, std::map< IdType, IdType >& mapIds, long long nTarFrameIndex, long long nSrcFrameIndex, long long nNumOfFrames )
{
auto nSrcMetadataId = spMetadata->getId();
// Check to make sure the metadata belongs to the source stream
if( nSrcMetadataId < 0 || srcStream.getById( nSrcMetadataId ) != spMetadata )
{
VMF_EXCEPTION(IncorrectParamException, "The input metadata does not belong to the source stream!" );
}
// Skip if it has already been imported
if( mapIds.find( nSrcMetadataId ) != mapIds.end() )
{
auto spNewMetadata = this->getById( mapIds[ nSrcMetadataId ] );
if( spNewMetadata == nullptr )
{
VMF_EXCEPTION(InternalErrorException, "Unexpected exception!" );
}
return spNewMetadata;
}
// Make a deep copy, add to the new stream, and add to the map
std::shared_ptr< Metadata > spNewMetadata( new Metadata( *spMetadata ));
if( !spNewMetadata->shiftFrameIndex( nTarFrameIndex, nSrcFrameIndex, nNumOfFrames ))
{
return nullptr;
}
auto nNewMetadataId = this->add( spNewMetadata );
mapIds[ nSrcMetadataId ] = nNewMetadataId;
// Wire to the correct description
auto spNewSchema = this->getSchema( spMetadata->getSchemaName() );
auto spNewDescriptor = spNewSchema == nullptr ? nullptr : spNewSchema->findMetadataDesc( spMetadata->getName() );
if( spNewDescriptor == nullptr )
{
VMF_EXCEPTION(InternalErrorException, "Metadata schema or description was not found!" );
}
spNewMetadata->setDescriptor( spNewDescriptor );
// Import all references recursively
spNewMetadata->removeAllReferences();
auto vReferences = spMetadata->getAllReferences();
std::for_each( vReferences.begin(), vReferences.end(), [&]( Reference& reference )
{
// Import the reference to the new stream
std::shared_ptr<Metadata> md = reference.getReferenceMetadata().lock();
auto spNewReference = import( srcStream, md, mapIds, nTarFrameIndex, nSrcFrameIndex, nNumOfFrames );
// Add as reference
if( spNewReference != nullptr )
spNewMetadata->addReference( spNewReference );
});
return spNewMetadata;
}
void XMPMetadataSource::loadMetadata(const MetaString& pathToCurrentMetadata, const shared_ptr<MetadataDesc>& description, MetadataStream& stream)
{
IdType id;
loadMetadataId(pathToCurrentMetadata, id);
shared_ptr<Metadata> thisMetadata = stream.getById(id);
if (thisMetadata)
{
// already loaded
return;
}
long long frameIndex;
loadMetadataFrameIndex(pathToCurrentMetadata, frameIndex);
long long numOfFrames;
loadMetadataNumOfFrames(pathToCurrentMetadata, numOfFrames);
long long timestamp;
loadMetadataTime(pathToCurrentMetadata, timestamp);
long long duration;
loadMetadataDuration(pathToCurrentMetadata, duration);
shared_ptr<MetadataAccessor> metadataAccessor(new MetadataAccessor(description));
metadataAccessor->setFrameIndex(frameIndex, numOfFrames);
metadataAccessor->setTimestamp(timestamp, duration);
metadataAccessor->setId(id);
MetaString fieldsPath;
SXMPUtils::ComposeStructFieldPath(VMF_NS, pathToCurrentMetadata.c_str(), VMF_NS, METADATA_FIELDS, &fieldsPath);
shared_ptr<MetadataSchema> thisSchemaDesc = stream.getSchema(description->getSchemaName());
shared_ptr<MetadataDesc> thisPropertyDesc = thisSchemaDesc->findMetadataDesc(description->getMetadataName());
SXMPIterator fieldsIterator(*xmp, VMF_NS, fieldsPath.c_str(), kXMP_IterJustChildren);
MetaString currentFieldPath;
while(fieldsIterator.Next(NULL, ¤tFieldPath))
{
loadField(currentFieldPath, metadataAccessor, thisPropertyDesc);
}
MetadataStreamAccessor* streamAccessor = (MetadataStreamAccessor*) &stream;
streamAccessor->internalAdd(metadataAccessor);
// Load refs only after adding to steam to stop recursive loading when there are circular references
MetaString pathToRefs;
SXMPUtils::ComposeStructFieldPath(VMF_NS, pathToCurrentMetadata.c_str(), VMF_NS, METADATA_REFERENCES, &pathToRefs);
SXMPIterator refsIterator(*xmp, VMF_NS, pathToRefs.c_str(), kXMP_IterJustChildren);
MetaString currentRefPath;
while(refsIterator.Next(NULL, ¤tRefPath))
{
loadReference(currentRefPath, metadataAccessor, stream);
}
}