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//------------------------------------------------------------------------------
// File: WinCtrl.h
//
// Desc: DirectShow base classes - defines classes for video control
// interfaces.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
ifndef __WINCTRL__
define __WINCTRL__
define ABSOL(x) (x < 0 ? -x : x)
define NEGAT(x) (x > 0 ? -x : x)
// Helper
BOOL WINAPI PossiblyEatMessage(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
<h4 align=right text=red> CBaseControlWindow</h4><hr>
class CBaseControlWindow : public CBaseVideoWindow, public CBaseWindow
{
protected:
CBaseFilter *m_pFilter; // Pointer to owning media filter
CBasePin *m_pPin; // Controls media types for connection
CCritSec *m_pInterfaceLock; // Externally defined critical section
COLORREF m_BorderColour; // Current window border colour
BOOL m_bAutoShow; // What happens when the state changes
HWND m_hwndOwner; // Owner window that we optionally have
HWND m_hwndDrain; // HWND to post any messages received
BOOL m_bCursorHidden; // Should we hide the window cursor
public:
// Internal methods for other objects to get information out
HRESULT DoSetWindowStyle(long Style,long WindowLong);
HRESULT DoGetWindowStyle(long *pStyle,long WindowLong);
BOOL IsAutoShowEnabled() { return m_bAutoShow; };<hr>
COLORREF GetBorderColour() { return m_BorderColour; };<hr>
HWND GetOwnerWindow() { return m_hwndOwner; };<hr>
BOOL IsCursorHidden() { return m_bCursorHidden; };<hr>
inline BOOL PossiblyEatMessage(UINT uMsg, WPARAM wParam, LPARAM lParam)
{
return ::PossiblyEatMessage(m_hwndDrain, uMsg, wParam, lParam);
}
// Derived classes must call this to set the pin the filter is using
// We don't have the pin passed in to the constructor (as we do with
// the CBaseFilter object) because filters typically create the
// pins dynamically when requested in CBaseFilter::GetPin. This can
// not be called from our constructor because is is a virtual method
void SetControlWindowPin(CBasePin *pPin) {
m_pPin = pPin;
}
public:
CBaseControlWindow(CBaseFilter *pFilter, // Owning media filter
CCritSec *pInterfaceLock, // Locking object
TCHAR *pName, // Object description
LPUNKNOWN pUnk, // Normal COM ownership
HRESULT *phr); // OLE return code
// These are the properties we support
STDMETHODIMP put_Caption(BSTR strCaption);
STDMETHODIMP get_Caption(BSTR *pstrCaption);
STDMETHODIMP put_AutoShow(long AutoShow);
STDMETHODIMP get_AutoShow(long *AutoShow);
STDMETHODIMP put_WindowStyle(long WindowStyle);
STDMETHODIMP get_WindowStyle(long *pWindowStyle);
STDMETHODIMP put_WindowStyleEx(long WindowStyleEx);
STDMETHODIMP get_WindowStyleEx(long *pWindowStyleEx);
STDMETHODIMP put_WindowState(long WindowState);
STDMETHODIMP get_WindowState(long *pWindowState);
STDMETHODIMP put_BackgroundPalette(long BackgroundPalette);
STDMETHODIMP get_BackgroundPalette(long *pBackgroundPalette);
STDMETHODIMP put_Visible(long Visible);
STDMETHODIMP get_Visible(long *pVisible);
STDMETHODIMP put_Left(long Left);
STDMETHODIMP get_Left(long *pLeft);
STDMETHODIMP put_Width(long Width);
STDMETHODIMP get_Width(long *pWidth);
STDMETHODIMP put_Top(long Top);
STDMETHODIMP get_Top(long *pTop);
STDMETHODIMP put_Height(long Height);
STDMETHODIMP get_Height(long *pHeight);
STDMETHODIMP put_Owner(OAHWND Owner);
STDMETHODIMP get_Owner(OAHWND *Owner);
STDMETHODIMP put_MessageDrain(OAHWND Drain);
STDMETHODIMP get_MessageDrain(OAHWND *Drain);
STDMETHODIMP get_BorderColor(long *Color);
STDMETHODIMP put_BorderColor(long Color);
STDMETHODIMP get_FullScreenMode(long *FullScreenMode);
STDMETHODIMP put_FullScreenMode(long FullScreenMode);
// And these are the methods
STDMETHODIMP SetWindowForeground(long Focus);
STDMETHODIMP NotifyOwnerMessage(OAHWND hwnd,long uMsg,LONG_PTR wParam,LONG_PTR lParam);
STDMETHODIMP GetMinIdealImageSize(long *pWidth,long *pHeight);
STDMETHODIMP GetMaxIdealImageSize(long *pWidth,long *pHeight);
STDMETHODIMP SetWindowPosition(long Left,long Top,long Width,long Height);
STDMETHODIMP GetWindowPosition(long *pLeft,long *pTop,long *pWidth,long *pHeight);
STDMETHODIMP GetRestorePosition(long *pLeft,long *pTop,long *pWidth,long *pHeight);
STDMETHODIMP HideCursor(long HideCursor);
STDMETHODIMP IsCursorHidden(long *CursorHidden);
};<hr>
// This class implements the IBasicVideo interface
<hr>
CBaseControlVideo</h4>
class CBaseControlVideo : public CBaseBasicVideo
{
protected:
CBaseFilter *m_pFilter; // Pointer to owning media filter
CBasePin *m_pPin; // Controls media types for connection
CCritSec *m_pInterfaceLock; // Externally defined critical section
public:
// Derived classes must provide these for the implementation
virtual HRESULT IsDefaultTargetRect() PURE;
virtual HRESULT SetDefaultTargetRect() PURE;
virtual HRESULT SetTargetRect(RECT *pTargetRect) PURE;
virtual HRESULT GetTargetRect(RECT *pTargetRect) PURE;
virtual HRESULT IsDefaultSourceRect() PURE;
virtual HRESULT SetDefaultSourceRect() PURE;
virtual HRESULT SetSourceRect(RECT *pSourceRect) PURE;
virtual HRESULT GetSourceRect(RECT *pSourceRect) PURE;
virtual HRESULT GetStaticImage(long *pBufferSize,long *pDIBImage) PURE;
// Derived classes must override this to return a VIDEOINFO representing
// the video format. We cannot call IPin ConnectionMediaType to get this
// format because various filters dynamically change the type when using
// DirectDraw such that the format shows the position of the logical
// bitmap in a frame buffer surface, so the size might be returned as
// 1024x768 pixels instead of 320x240 which is the real video dimensions
virtual VIDEOINFOHEADER *GetVideoFormat() PURE;
// Helper functions for creating memory renderings of a DIB image
HRESULT GetImageSize(VIDEOINFOHEADER *pVideoInfo,
LONG *pBufferSize,
RECT *pSourceRect);
HRESULT CopyImage(IMediaSample *pMediaSample,
VIDEOINFOHEADER *pVideoInfo,
LONG *pBufferSize,
BYTE *pVideoImage,
RECT *pSourceRect);
// Override this if you want notifying when the rectangles change
virtual HRESULT OnUpdateRectangles() { return NOERROR; };
virtual HRESULT OnVideoSizeChange();
// Derived classes must call this to set the pin the filter is using
// We don't have the pin passed in to the constructor (as we do with
// the CBaseFilter object) because filters typically create the
// pins dynamically when requested in CBaseFilter::GetPin. This can
// not be called from our constructor because is is a virtual method
void SetControlVideoPin(CBasePin *pPin) {
m_pPin = pPin;
}
// Helper methods for checking rectangles
virtual HRESULT CheckSourceRect(RECT *pSourceRect);
virtual HRESULT CheckTargetRect(RECT *pTargetRect);
public:
CBaseControlVideo(CBaseFilter *pFilter, // Owning media filter
CCritSec *pInterfaceLock, // Serialise interface
TCHAR *pName, // Object description
LPUNKNOWN pUnk, // Normal COM ownership
HRESULT *phr); // OLE return code
// These are the properties we support
STDMETHODIMP get_AvgTimePerFrame(REFTIME *pAvgTimePerFrame);
STDMETHODIMP get_BitRate(long *pBitRate);
STDMETHODIMP get_BitErrorRate(long *pBitErrorRate);
STDMETHODIMP get_VideoWidth(long *pVideoWidth);
STDMETHODIMP get_VideoHeight(long *pVideoHeight);
STDMETHODIMP put_SourceLeft(long SourceLeft);
STDMETHODIMP get_SourceLeft(long *pSourceLeft);
STDMETHODIMP put_SourceWidth(long SourceWidth);
STDMETHODIMP get_SourceWidth(long *pSourceWidth);
STDMETHODIMP put_SourceTop(long SourceTop);
STDMETHODIMP get_SourceTop(long *pSourceTop);
STDMETHODIMP put_SourceHeight(long SourceHeight);
STDMETHODIMP get_SourceHeight(long *pSourceHeight);
STDMETHODIMP put_DestinationLeft(long DestinationLeft);
STDMETHODIMP get_DestinationLeft(long *pDestinationLeft);
STDMETHODIMP put_DestinationWidth(long DestinationWidth);
STDMETHODIMP get_DestinationWidth(long *pDestinationWidth);
STDMETHODIMP put_DestinationTop(long DestinationTop);
STDMETHODIMP get_DestinationTop(long *pDestinationTop);
STDMETHODIMP put_DestinationHeight(long DestinationHeight);
STDMETHODIMP get_DestinationHeight(long *pDestinationHeight);
// And these are the methods
STDMETHODIMP GetVideoSize(long *pWidth,long *pHeight);
STDMETHODIMP SetSourcePosition(long Left,long Top,long Width,long Height);
STDMETHODIMP GetSourcePosition(long *pLeft,long *pTop,long *pWidth,long *pHeight);
STDMETHODIMP GetVideoPaletteEntries(long StartIndex,long Entries,long *pRetrieved,long *pPalette);
STDMETHODIMP SetDefaultSourcePosition();
STDMETHODIMP IsUsingDefaultSource();
STDMETHODIMP SetDestinationPosition(long Left,long Top,long Width,long Height);
STDMETHODIMP GetDestinationPosition(long *pLeft,long *pTop,long *pWidth,long *pHeight);
STDMETHODIMP SetDefaultDestinationPosition();
STDMETHODIMP IsUsingDefaultDestination();
STDMETHODIMP GetCurrentImage(long *pBufferSize,long *pVideoImage);
};
endif // __WINCTRL__
(C) Æliens
20/2/2008
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