MetaData from a Dalsa Nano

Programming Questions .Net API
7

OK, a few pointers for any other poor mortal who bites of more than they can chew.

  • Do I have to use DeviceImage, or can I use StreamImage?
    This question related to the code here which uses DeviceImage. Given that the only ‘added value’ of DeviceImage is that it contains a reference to Device, I refactored the three classes from github, which ends up meaning that the signature of GetChunk is GetChunk(Image image, Device device).

  • Do I really have to set PixelFormat to Raw to get the metadata?
    It doesn’t look like it.

  • Could someone point me towards documents which could at least give me the memory layout, offsets etc.?
    I didn’t find any documents, but I’ve managed to get this far (as it’s all I need):

For the rest

[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct NanoInfoChunk
{
    public const uint ID = 0xCD000001;

    public long Dummy;
    public long ChunkExposureTime;
    public long ChunkCyclingPresetCurrentActiveSet;
}

If you want to work on the rest, you can add the three middle lines to DeferenceNanoInfoOn (still inspired from the code posted on the other topic):

private static unsafe NanoInfoChunk DereferenceNanoInfoOn(Image image, GevChunk chunk)
{
    var chunkPtr = new IntPtr(image.GetBufferBasePtr().ToInt64() + chunk.Offset);
    byte[] bytes = new byte[chunk.Length];
    Marshal.Copy(chunkPtr, bytes, 0, (int)chunk.Length);
    System.Diagnostics.Debug.WriteLine(BitConverter.ToString(bytes));
    return *(NanoInfoChunk*)chunkPtr;
}