public void Decode(DcmDataset dataset, DcmPixelData oldPixelData, DcmPixelData newPixelData, DcmCodecParameters parameters)
{
DcmRleCodecParameters rleParams = parameters as DcmRleCodecParameters;
if (rleParams == null)
{
rleParams = GetDefaultParameters() as DcmRleCodecParameters;
}
int pixelCount = oldPixelData.ImageWidth * oldPixelData.ImageHeight;
int numberOfSegments = oldPixelData.BytesAllocated * oldPixelData.SamplesPerPixel;
byte[] frameData = new byte[newPixelData.UncompressedFrameSize];
for (int i = 0; i < oldPixelData.NumberOfFrames; i++)
{
IList <ByteBuffer> rleData = oldPixelData.GetFrameFragments(i);
RLEDecoder decoder = new RLEDecoder(rleData);
if (decoder.NumberOfSegments != numberOfSegments)
{
throw new DicomCodecException("Unexpected number of RLE segments!");
}
for (int s = 0; s < numberOfSegments; s++)
{
int sample = s / newPixelData.BytesAllocated;
int sabyte = s % newPixelData.BytesAllocated;
int pos, offset;
if (newPixelData.PlanarConfiguration == 0)
{
pos = sample * newPixelData.BytesAllocated;
offset = newPixelData.SamplesPerPixel * newPixelData.BytesAllocated;
}
else
{
pos = sample * newPixelData.BytesAllocated * pixelCount;
offset = newPixelData.BytesAllocated;
}
if (rleParams.ReverseByteOrder)
{
pos += sabyte;
}
else
{
pos += newPixelData.BytesAllocated - sabyte - 1;
}
decoder.DecodeSegment(s, frameData, pos, offset);
}
newPixelData.AddFrame(frameData);
}
}
public void Encode(DcmDataset dataset, DcmPixelData oldPixelData, DcmPixelData newPixelData, DcmCodecParameters parameters)
{
DcmRleCodecParameters rleParams = parameters as DcmRleCodecParameters;
if (rleParams == null)
{
rleParams = GetDefaultParameters() as DcmRleCodecParameters;
}
int pixelCount = oldPixelData.ImageWidth * oldPixelData.ImageHeight;
int numberOfSegments = oldPixelData.BytesAllocated * oldPixelData.SamplesPerPixel;
for (int i = 0; i < oldPixelData.NumberOfFrames; i++)
{
RLEEncoder encoder = new RLEEncoder();
byte[] frameData = oldPixelData.GetFrameDataU8(i);
for (int s = 0; s < numberOfSegments; s++)
{
encoder.NextSegment();
int sample = s / oldPixelData.BytesAllocated;
int sabyte = s % oldPixelData.BytesAllocated;
int pos;
int offset;
if (newPixelData.PlanarConfiguration == 0)
{
pos = sample * oldPixelData.BytesAllocated;
offset = numberOfSegments;
}
else
{
pos = sample * oldPixelData.BytesAllocated * pixelCount;
offset = oldPixelData.BytesAllocated;
}
if (rleParams.ReverseByteOrder)
{
pos += sabyte;
}
else
{
pos += oldPixelData.BytesAllocated - sabyte - 1;
}
for (int p = 0; p < pixelCount; p++)
{
if (pos >= frameData.Length)
{
throw new DicomCodecException("");
}
encoder.Encode(frameData[pos]);
pos += offset;
}
encoder.Flush();
}
encoder.MakeEvenLength();
newPixelData.AddFrame(encoder.GetBuffer());
}
}
