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}
CziParser::~CziParser()
{
}
CziFile CziParser::parse_czi_file(const std::string &file)
{
BinaryStream cziStream(file);
CziFile parsedFile;
parsedFile.fileName = file;
parsedFile.header = parse_file_header(cziStream);
parsedFile.metadata = parse_metadata(cziStream, parsedFile.header.metadataPosition);
parsedFile.subBlockDirectory = parse_subblock_directory(cziStream, parsedFile.header.subBlockDirectoryPosition);
for (size_t entryId = 0; entryId < parsedFile.subBlockDirectory.entryCount; entryId++)
{
//TODO: Support multi-file scenario.
int filePart = parsedFile.subBlockDirectory.entries[entryId].filePart;
assert(filePart == 0 && "We are currently supporting only single-file scenario.");
long subBlockPosition = parsedFile.subBlockDirectory.entries[entryId].filePosition;
int entrySize = parsedFile.subBlockDirectory.entries[entryId].entrySize;
parsedFile.subBlockDirectory.entries[entryId].subBlock = parse_subblock(cziStream, subBlockPosition, entryId, entrySize);
}
}
SegmentHeader CziParser::parse_segment_header(BinaryStream &cziStream)
{
SegmentHeader result = {};
// 16 B for segment id.
result.sId = utf8bytes_to_string(cziStream.consume_bytes(16), 0, 16);
// 8 B for allocated size.
result.allocatedSize = cziStream.consume_long();
// 8 B for used size.
result.usedSize = cziStream.consume_long();
return result;
}
FileHeaderSegment CziParser::parse_file_header(BinaryStream &cziStream)
result.header = parse_segment_header(cziStream);
assert(result.header.sId == "ZISRAWFILE");
result.fileVersion = {};
result.fileVersion.major = cziStream.consume_int();
result.fileVersion.minor = cziStream.consume_int();
// 8 next bytes are reserved and not used for anythint ATM.
cziStream.move_by(8);
result.masterFileGuid = cziStream.consume_bytes(16);
result.fileGuid = cziStream.consume_bytes(16);
result.filePart = cziStream.consume_int();
result.subBlockDirectoryPosition = cziStream.consume_long();
result.metadataPosition = cziStream.consume_long();
result.updatePending = cziStream.consume_bool(4);
result.attachmentDirectoryPosition = cziStream.consume_long();
return result;
}
MetadataSegment CziParser::parse_metadata(BinaryStream &cziStream, const long position)
assert(position > 0);
cziStream.move_to(position);
MetadataSegment result = {};
result.header = parse_segment_header(cziStream);
assert(result.header.sId == "ZISRAWMETADATA");
result.xmlSize = cziStream.consume_int();
result.attachmentSize = cziStream.consume_int();
// 248 B are spare, so not used atm?
// Skipping 248 spared bytes.
cziStream.move_by(248);
result.xmlString = utf8bytes_to_string(cziStream.consume_bytes(result.xmlSize));
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//printf("%s\n", result.xmlString.c_str());
return result;
}
SubBlockDirectory CziParser::parse_subblock_directory(BinaryStream &cziStream, const long position)
{
assert(position > 0);
cziStream.move_to(position);
SubBlockDirectory result = {};
result.header = parse_segment_header(cziStream);
assert(result.header.sId == "ZISRAWDIRECTORY");
result.entryCount = cziStream.consume_int();
// 124 B are reserved, skipping.
cziStream.move_by(124);
result.entries.reserve(result.entryCount);
for (size_t entry = 0; entry < result.entryCount; entry++)
{
result.entries.push_back(parse_subblock_directory_entry(cziStream));
}
return result;
}
DirectoryEntryDV CziParser::parse_subblock_directory_entry(BinaryStream &cziStream)
{
DirectoryEntryDV result = {};
result.schemaType = cziStream.consume_bytes(2);
assert(result.schemaType.size() == 2 && result.schemaType[0] == 'D' && result.schemaType[1] == 'V');
result.pixelType = to_pixel_type(cziStream.consume_int());
result.filePosition = cziStream.consume_long();
result.filePart = cziStream.consume_int();
result.compression = to_compression_type(cziStream.consume_int());
result.pyramidType = to_pyramid_type(cziStream.consume_byte());
// 5 next bytes are spare, reserved, skipping them.
cziStream.move_by(5);
result.dimensionCount = cziStream.consume_int();
assert(result.dimensionCount > 0);
result.dimensions.reserve(result.dimensionCount);
for (size_t dim = 0; dim < result.dimensionCount; dim++)
{
auto dimEntry = parse_dimension_entry(cziStream);
result.dimensions.push_back(dimEntry);
if (dimEntry.dimension == Dimension::X)
result.width = dimEntry.size;
if (dimEntry.dimension == Dimension::Y)
result.height = dimEntry.size;
result.entrySize = 32 + (result.dimensionCount * DimensionEntryDV1Size);
return result;
}
DimensionEntryDV1 CziParser::parse_dimension_entry(BinaryStream &cziStream)
{
DimensionEntryDV1 result = {};
result.dimensionBytes = cziStream.consume_bytes(4);
result.dimension = to_dimension_type(result.dimensionBytes);
result.start = cziStream.consume_int();
result.size = cziStream.consume_int();
result.startCoordinate = cziStream.consume_float();
result.storedSize = cziStream.consume_int();
return result;
}
SubBlockSegment CziParser::parse_subblock(BinaryStream &cziStream, const long position, const int entryIndex, const int entrySize)
{
assert(position > 0);
cziStream.move_to(position);
SubBlockSegment result = {};
result.header = parse_segment_header(cziStream);
assert(result.header.sId == "ZISRAWSUBBLOCK");
result.metadataSize = cziStream.consume_int();
result.attachmentSize = cziStream.consume_int();
result.dataSize = cziStream.consume_long();
result.directoryEntryIndex = entryIndex;
// Metadata, Data, Attachments are offsetted by DirectoryEntrySize + Fill size;
int fillOffset = entrySize + 16;
int div = 256 - fillOffset;
int fillSize = (div > 0) ? div : 0;
int distance = entrySize + fillSize;
cziStream.move_by(distance);
auto metadataBytes = cziStream.consume_bytes(result.metadataSize);
result.metadataString = utf8bytes_to_string(metadataBytes);
// For now we won't read image into memory, we will just save its location in file.
result.dataLocation = cziStream.get_position();
// Attachments bytes
return result;
}
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PixelType CziParser::to_pixel_type(const int value)
{
PixelType result = static_cast<PixelType>(value);
switch (result)
{
case PixelType::Gray8:
case PixelType::Gray16:
case PixelType::Gray32Float:
case PixelType::Bgr24:
case PixelType::Bgr48:
case PixelType::Bgr96Float:
case PixelType::Bgra32:
case PixelType::Gray64ComplexFloat:
case PixelType::Bgr192ComplexFloat:
case PixelType::Gray32:
case PixelType::Gray64:
{
// Correct pixel types.
break;
}
default:
assert("Bad pixel type." && false);
break;
}
return result;
}
PyramidType CziParser::to_pyramid_type(const byte value)
{
PyramidType result = static_cast<PyramidType>(value);
switch (result)
{
case PyramidType::None:
case PyramidType::SingleSubBlock:
case PyramidType::MultiSubBlock:
break;
default:
{
assert("Bad pyramid type." && false);
break;
}
}
return result;
}
CompressionType CziParser::to_compression_type(const int value)
{
CompressionType result = static_cast<CompressionType>(value);
switch (result)
{
case CompressionType::Uncompressed:
case CompressionType::LZW:
case CompressionType::JpgFile:
case CompressionType::JpegXrFile:
case CompressionType::Camera:
case CompressionType::System:
break;
default:
{
assert("Bad compression type." && false);
break;
}
}
return result;
}
Dimension CziParser::to_dimension_type(const std::vector<byte> &bytes)
{
assert(bytes.size() == 4);
Dimension result = static_cast<Dimension>((char)bytes[0]);
switch (result)
{
case Dimension::X:
case Dimension::Y:
case Dimension::C:
case Dimension::Z:
case Dimension::T:
case Dimension::R:
case Dimension::S:
case Dimension::I:
case Dimension::B:
case Dimension::M:
case Dimension::H:
case Dimension::V:
break;
default:
{
assert("Bad dimension type." && false);
break;
}
}