windowedrendering.java

来自「FMJ（freedom media for java)是java视频开发的新选择」· Java 代码 · 共 54 行

package net.sf.jdshow;



/**
 * Helper to set up windowed rendering.
 * @author Ken Larson
 *
 */
public class WindowedRendering
{
	/**
	 * Pure native.
	 */
	public static native int InitWindowedRendering( 
		    long hwndApp,                  // Window to hold the video. 
		    long /*IGraphBuilder**/ pGraph         // Pointer to the Filter Graph Manager. 
		    );   

	public static int InitWindowedRendering2( 
		    long hwndApp,                  // Window to hold the video. 
		    IGraphBuilder /*IGraphBuilder**/ pGraph         // Pointer to the Filter Graph Manager. 
		)
	{
		int hr;
		final long[] p = new long[1];
		
		hr = pGraph.QueryInterface(Com.IID_IVideoWindow, p);
		if (Com.FAILED(hr)) return hr;
		
		final IVideoWindow videoWindow = new IVideoWindow(p[0]);

		hr = videoWindow.put_Owner(hwndApp);
		if (Com.FAILED(hr)) return hr;
		 
		hr = videoWindow.put_WindowStyle(Com.WS_CHILD | Com.WS_CLIPSIBLINGS);
		if (Com.FAILED(hr)) return hr;
		 
		hr = videoWindow.put_MessageDrain(hwndApp);
		if (Com.FAILED(hr)) return hr;
		 
		hr = videoWindow.put_Top(0);
		if (Com.FAILED(hr)) return hr;

		hr = videoWindow.put_Left(0);
		if (Com.FAILED(hr)) return hr;


		videoWindow.Release(); 
		
		return Com.S_OK;
	}
}