playwnd.h

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//------------------------------------------------------------------------------
// File: PlayWnd.h
//
// Desc: DirectShow sample code - header file for video in window movie
//       player application.
//
// Copyright (c) 1998-2001 Microsoft Corporation.  All rights reserved.
//------------------------------------------------------------------------------
#ifndef _DXPLAYER_H
#define _DXPLAYER_H
//------------------------------------------------------------------------------
// Constants
//------------------------------------------------------------------------------
#define VOLUME_FULL     0L
#define VOLUME_SILENCE  -10000L
// Defaults used with audio-only files
#define DEFAULT_AUDIO_WIDTH     240
#define DEFAULT_AUDIO_HEIGHT    120
#define DEFAULT_VIDEO_WIDTH     320
#define DEFAULT_VIDEO_HEIGHT    240
#define MINIMUM_VIDEO_WIDTH     200
#define MINIMUM_VIDEO_HEIGHT    120

#define WM_GRAPHNOTIFY  WM_USER+13

enum PLAYSTATE { _STOPPED, _PAUSED, _RUNNING, _INIT };
//------------------------------------------------------------------------------
// Macros
//------------------------------------------------------------------------------
#define SAFE_RELEASE(x) { if (x) x->Release(); x = NULL; }

#define JIF(x) if (FAILED(hr=(x))) \
    {Msg(TEXT("FAILED(hr=0x%x) in ") TEXT(#x) TEXT("\n"), hr); return hr;}

#define LIF(x) if (FAILED(hr=(x))) \
    {Msg(TEXT("FAILED(hr=0x%x) in ") TEXT(#x) TEXT("\n"), hr);}

//------------------------------------------------------------------------------
struct IGraphBuilder;
struct IMediaControl;
struct IMediaEventEx;
struct IVideoWindow;
struct IBasicAudio;
struct IBasicVideo;
struct IMediaSeeking;
struct IMediaPosition;
struct IVideoFrameStep;
//------------------------------------------------------------------------------

class CDXPlayer
{
public:
	CDXPlayer();
	~CDXPlayer();
	BOOL IsRepeat() { return m_bRepeat; }
	void SetRepeat(BOOL bRepeat) { m_bRepeat = bRepeat; }
	void SetPlayerWindow(HWND hWnd);
	void OpenClip(TCHAR* pszFileName);
	HRESULT HandleGraphEvent();
private:
	HRESULT InitVideoWindow(int nMultiplier, int nDivider);
	HRESULT StepOneFrame();
	HRESULT StepFrames(int nFramesToStep);
	HRESULT ModifyRate(double dRateAdjust);
	HRESULT SetRate(double dRate);

	HRESULT PlayMovieInWindow(LPTSTR szFile);
	HRESULT ToggleMute();
	HRESULT ToggleFullScreen(HWND hWnd);

	BOOL GetFrameStepInterface();

	void PaintAudioWindow();
	void MoveVideoWindow(HWND hWnd);
	void CheckVisibility();
	void CloseInterfaces();

	void PauseClip();
	void StopClip();
	void CloseClip();

	void UpdateMainTitle();
	void EnablePlaybackMenu(BOOL bEnable);
	void GetFilename(TCHAR *pszFull, TCHAR *pszFile);
	void Msg(TCHAR *szFormat, ...);

	HRESULT AddGraphToRot(IUnknown *pUnkGraph, DWORD *pdwRegister);
	void RemoveGraphFromRot(DWORD pdwRegister);
private:
	HWND m_hWnd;
	// DirectShow interfaces
	IGraphBuilder*	m_pGraphBuilder;
	IMediaControl*	m_pMediaControl;
	IMediaEventEx*	m_pMediaEventEx;
	IVideoWindow*	m_pVideoWindow;
	IBasicAudio*	m_pBaseAudio;
	IBasicVideo*	m_pBaseVidio;
	IMediaSeeking*	m_pMediaSeeking;
	IMediaPosition*	m_pMediaPosition;
	IVideoFrameStep* m_pVideoFrameStep;
	// controls
	BOOL m_bRepeat;
	BOOL m_bAudioOnly;
	BOOL m_bFullscreen;
	LONG m_lVolume;
	DWORD m_dwGraphRegister;
	PLAYSTATE	m_psCurrent;
	double m_PlaybackRate;
};
//------------------------------------------------------------------------------
extern CDXPlayer g_objMediaPlayer;
//------------------------------------------------------------------------------
#endif