/// <summary>
/// Opens the next frame in the stream.
/// </summary>
/// <param name="millisecondsWait">The timeout (in milliseconds) before returning without a new frame.</param>
/// <returns>The next frame in the stream.</returns>
public ImageFrame OpenNextFrame()
{
if (streamHandle == IntPtr.Zero)
throw new KinectException("Open the imagestream first");
var res = NuiImageStreamGetNextFrame(streamHandle, 100, ref imageFramePtr);
if (res != HRESULT.S_OK) return null;
var frame = new NuiImageFrame();
Marshal.PtrToStructure(imageFramePtr, frame);
//TODO
var texture = Marshal.GetDelegateForFunctionPointer(frame.pFrameTexture, typeof(INuiFrameTexture));// = (INuiFrameTexture)Marshal.GetObjectForIUnknown(frame.pFrameTexture);
var rect = new NuiLockedRect();
//res = texture.LockRect(0, ref rect, IntPtr.Zero, 0);
byte[] data = new byte[rect.size];
Marshal.Copy(rect.pBits, data, 0, (int)rect.size);
int width = 0;
int height = 0;
switch (frame.eResolution) {
case ImageResolution.Resolution80x60:
width = 80;
height = 60;
break;
case ImageResolution.Resolution640x480:
width = 640;
height = 480;
break;
case ImageResolution.Resolution320x240:
width = 320;
height = 240;
break;
case ImageResolution.Resolution1280x1024:
width = 1280;
height = 1024;
break;
default:
width = 640;
height = 480;
break;
}
ImageFrame imageFrame = new ImageFrame(frame.eImageType, frame.eResolution, height, width, (int)frame.dwFrameNumber, (int)rect.size, (int)frame.liTimeStamp, data);
res = NuiImageStreamReleaseFrame(streamHandle, imageFramePtr);
if (res != HRESULT.S_FALSE && res != HRESULT.S_OK)
throw new KinectException("Failed to release stream.");
return imageFrame;
}
private static extern HRESULT LockRect(uint Level, NuiLockedRect pLockedRect, uint pRect, uint Flags);
