//private IntPtr m_handle = IntPtr.Zero;
//private int m_videoWidth;
//private int m_videoHeight;
//private int m_stride;
protected void WpfUpdateVideoSize()
{
if (this.videoRenderer is ISampleGrabber)
{
try
{
ISampleGrabber sampGrabber = this.videoRenderer as ISampleGrabber;
// Get the media type from the SampleGrabber
AMMediaType media = new AMMediaType();
int hr = sampGrabber.GetConnectedMediaType(media);
DsError.ThrowExceptionForHR(hr);
if ((media.formatType != FormatType.VideoInfo) || (media.formatPtr == IntPtr.Zero))
{
throw new NotSupportedException("Unknown Grabber Media Format");
}
// Grab the size info
VideoInfoHeader videoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(media.formatPtr, typeof(VideoInfoHeader));
int videoWidth = videoInfoHeader.BmiHeader.Width;
int videoHeight = videoInfoHeader.BmiHeader.Height;
int stride = videoWidth * (videoInfoHeader.BmiHeader.BitCount / 8);
DsUtils.FreeAMMediaType(media);
media = null;
int bytePerPixel = 4;
// These are 'dummy' pixels only used to create our bitmap
// further editing after bitmap creation of these pixels does nothing,
// that is what this hack is for
byte[] frameBuffer = new byte[videoWidth * videoHeight * bytePerPixel];
//Create a new bitmap source
BitmapSource bitmapSource = BitmapSource.Create(videoWidth,
videoHeight,
96,
96,
PixelFormats.Bgr32,
null,
frameBuffer,
videoWidth * bytePerPixel);
this.hostingControl.WPFImage.Source = bitmapSource;
lock (this.hostingControl.WPFImage)
{
this.wpfBitmapBuffer = new WPFUtil.BitmapBuffer(bitmapSource);
}
}
catch (Exception)
{
}
}
}
protected void WPFStop()
{
if (this.hostingControl != null && this.hostingControl.WPFImage != null)
{
lock (this.hostingControl.WPFImage)
{
this.wpfBitmapBuffer = null;
}
}
}
