Intelligent Screen Saver

namespace dshow.Core
{
	using System;
	using System.Runtime.InteropServices;

	// IBasicVideo interface
	//
	// The interface enables applications to set video properties
	// such as the bit rate, and destination and source rectangles
	//
	[ComImport,
	Guid("56A868B5-0AD4-11CE-B03A-0020AF0BA770"),
	InterfaceType(ComInterfaceType.InterfaceIsDual)]
	internal interface IBasicVideo
	{
		// Retrieves the average time between successive frames
		// in 100-nanosecond units
		[PreserveSig]
		int get_AvgTimePerFrame(
			out double pAvgTimePerFrame);

		// Retrieves an approximate bit rate for the video stream
		[PreserveSig]
		int get_BitRate(
			out int pBitRate);

		// Retrieves an approximate bit error rate for the video stream
		[PreserveSig]
		int get_BitErrorRate(
			out int pBitRate);

		// Retrieves the current video width
		[PreserveSig]
		int get_VideoWidth(
			out int pVideoWidth);

		// Retrieves the current video height
		[PreserveSig]
		int get_VideoHeight(
			out int pVideoHeight);

		// Sets the x-axis coordinate for the source video rectangle
		[PreserveSig]
		int put_SourceLeft(
			int SourceLeft);
		// Retrieves the x-axis coordinate for the source video rectangle
		[PreserveSig]
		int get_SourceLeft(
			out int pSourceLeft);

		// Sets the width of the source video rectangle
		[PreserveSig]
		int put_SourceWidth(
			int SourceWidth);
		// Retrieves the width of the source video rectangle
		[PreserveSig]
		int get_SourceWidth(
			out int pSourceWidth);

		// Sets the y-axis coordinate for the source video rectangle
		[PreserveSig]
		int put_SourceTop(
			int SourceTop);
		// Retrieves the y-axis coordinate for the source video rectangle
		[PreserveSig]
		int get_SourceTop(
			out int pSourceTop);

		// Sets the height of the source video rectangle
		[PreserveSig]
		int put_SourceHeight(
			int SourceHeight);
		// Retrieves the height of the source video rectangle
		[PreserveSig]
		int get_SourceHeight(
			out int pSourceHeight);

		// Sets the x-axis coordinate for the destination video rectangle
		[PreserveSig]
		int put_DestinationLeft(
			int DestinationLeft);
		// Retrieves the x-axis coordinate for the destination video rectangle
		[PreserveSig]
		int get_DestinationLeft(
			out int pDestinationLeft);

		// Sets the width of the destination video rectangle
		[PreserveSig]
		int put_DestinationWidth(
			int DestinationWidth);
		// Retrieves the width of the destination video rectangle
		[PreserveSig]
		int get_DestinationWidth(
			out int pDestinationWidth);

		// Sets the y-axis coordinate for the destination video rectangle
		[PreserveSig]
		int put_DestinationTop(
			int DestinationTop);
		// Retrieves the y-axis coordinate for the destination video rectangle
		[PreserveSig]
		int get_DestinationTop(
			out int pDestinationTop);

		// Sets the height of the destination video rectangle
		[PreserveSig]
		int put_DestinationHeight(
			int DestinationHeight);
		// Retrieves the height of the destination video rectangle
		[PreserveSig]
		int get_DestinationHeight(
			out int pDestinationHeight);

		// Sets the source video rectangle
		[PreserveSig]
		int SetSourcePosition(
			int left,
			int top,
			int width,
			int height);

		// Retrieves the source video rectangle
		[PreserveSig]
		int GetSourcePosition(
			out int left,
			out int top,
			out int width,
			out int height);

		// Informs the renderer to use the default source rectangle
		[PreserveSig]
		int SetDefaultSourcePosition();

		// Sets the destination rectangle for the window
		[PreserveSig]
		int SetDestinationPosition(
			int left,
			int top,
			int width,
			int height);

		// Retrieves the destination video rectangle for the window
		[PreserveSig]
		int GetDestinationPosition(
			out int left,
			out int top,
			out int width,
			out int height);

		// Sets the default destination position for the window
		[PreserveSig]
		int SetDefaultDestinationPosition();

		// Retrieves the native video dimensions
		[PreserveSig]
		int GetVideoSize(
			out int pWidth,
			out int pHeight);

		// Retrieves the color palette entries required by the video
		[PreserveSig]
		int GetVideoPaletteEntries(
			int StartIndex,
			int Entries,
			out int pRetrieved,
			IntPtr pPalette);

		// Returns a copy of the current image that is waiting at the renderer
		[PreserveSig]
		int GetCurrentImage(
			ref int pBufferSize,
			IntPtr pDIBImage);

		// Determines if the renderer is using the default source rectangle
		[PreserveSig]
		int IsUsingDefaultSource();

		// Determines if the renderer is using the default destination rectangle
		[PreserveSig]
		int IsUsingDefaultDestination();

	}
}