/// <summary>
/// Gets the current frame from the buffer.
/// </summary>
/// <returns>The Bitmap of the frame.</returns>
public IDisposable GetFrame(IBitmapLoader BitmapLoader)
{
if (_actualGraphState != GraphState.Rendered)
{
return(null);
}
//Asks for the buffer size.
var bufferSize = 0;
_sampGrabber.GetCurrentBuffer(ref bufferSize, IntPtr.Zero);
if (bufferSize <= 0)
{
return(null);
}
if (_savedArray == null || _savedArray.Length < bufferSize)
{
_savedArray = new byte[bufferSize + 64000];
}
//Allocs the byte array.
var handleObj = GCHandle.Alloc(_savedArray, GCHandleType.Pinned);
//Gets the addres of the pinned object.
var address = handleObj.AddrOfPinnedObject();
try
{
//Puts the buffer inside the byte array.
_sampGrabber.GetCurrentBuffer(ref bufferSize, address);
//Image size.
var width = _videoInfoHeader.BmiHeader.Width;
var height = _videoInfoHeader.BmiHeader.Height;
var stride = width * 4;
address += height * stride;
return(BitmapLoader.CreateBitmapBgr32(new Size(width, height), address, -stride));
}
finally
{
handleObj.Free();
}
}
