private static int MSB = -2147483648; // 0x80000000
public DicomJpegLosslessDecoderImpl(IByteBuffer data)
{
_buffer = new ByteBufferByteSource(data)
{
Endian = Endian.Big
};
_frame = new FrameHeader();
_scan = new ScanHeader();
_quantTable = new QuantizationTable();
_huffTable = new HuffmanTable();
}
private static DicomDataset ReadFragment(byte[] bytes, Endian endian, bool explicitVr)
{
var dataset = new DicomDataset();
var reader = new DicomReader {
IsExplicitVR = explicitVr
};
var byteSource = new ByteBufferByteSource(new MemoryByteBuffer(bytes))
{
Endian = endian
};
reader.Read(byteSource, new DicomDatasetReaderObserver(dataset));
return(dataset);
}
internal RLEDecoder(IByteBuffer data)
{
var source = new ByteBufferByteSource(data)
{
Endian = Endian.Little
};
NumberOfSegments = source.GetInt32();
_offsets = new int[15];
for (var i = 0; i < 15; ++i)
{
_offsets[i] = source.GetInt32();
}
_data = data.Data;
}
private DicomDataset DeepClone_(DicomDataset dataset)
{
var ms = new MemoryStream();
var target = new StreamByteTarget(ms);
var writer = new DicomWriter(DicomTransferSyntax.ImplicitVRLittleEndian, DicomWriteOptions.Default, target);
var walker = new DicomDatasetWalker(dataset);
walker.Walk(writer);
var clone = new DicomDataset();
var reader = new DicomReader {
IsExplicitVR = false
};
var byteSource = new ByteBufferByteSource(
new MemoryByteBuffer(ms.ToArray()));
reader.Read(byteSource, new DicomDatasetReaderObserver(clone));
return(clone);
}
private bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
_huffTable = null;
_quantTable = null;
_quantTable = null;
_scan = null;
_frame = null;
_buffer = null;
}
// TODO: free unmanaged resources (unmanaged objects) and override a finalizer below.
// TODO: set large fields to null.
disposedValue = true;
}
}
