vrexplayeradapter.h

symbian s60 有关音频的代码实例,供参考

/*
* ============================================================================
*  Name     : CVideoPlayerAdapter from VRexPlayerAdapter.h
*  Part of  : Video Example
*  Created  : 30/08/2006 by Forum  Nokia
*  Implementation notes:
*  Version  : 2.0
*  Copyright: Nokia Corporation, 2006
* ============================================================================
*/

#ifndef __VIDEOPLAYERADAPTER_H__
#define __VIDEOPLAYERADAPTER_H__

#include <e32base.h>
#include <mmferrors.h>

#include <VideoPlayer.h>
#include <DocumentHandler.h>

#include "VRex.hrh"
#include "VRexEngine.h"
#include "VRexFileDetails.h"
#include "MPlayerUIControllerListener.h"

class CVideoFileDetails;
class CVRexEngine;
class CVideoPlayerUtility;
class MPlayerUIControllerListener;
class CDocumentHandler;
class CHeartbeat;

/**
 *  CVideoPlayerAdapter
 *  Used to handle video player specific tasks.
 */
class CVideoPlayerAdapter : public CBase, public MVideoPlayerUtilityObserver, 
    public MBeating
	{
	public: // Constructors and destructor
		enum TPlayerState
		    {
		    ENotInitialized,
		    EInitializing,
		    EStopped,
		    EPlaying,
		    EPaused
		    };

		enum TPlayerErrorCode
			{
			EErrReOpen = 101,
			EErrAutoDisconnect,
			EErrAudioLost
			};

		/**
         * Two-phased constructor.
         */
		static CVideoPlayerAdapter* NewL();

		/**
         * Two-phased constructor.
         */
		static CVideoPlayerAdapter* NewLC();

		/**
         * Destructor.
         */
		~CVideoPlayerAdapter();

	private:
		/**
         * EPOC 2nd phase constructor.
         */
		void ConstructL();

		/**
         * Default constructor.
         */
		CVideoPlayerAdapter();

	public: // New functions
		/**
		 * This method plays a video clip.
		 * @return void
		 */
		void PlayL();

		/**
		 * This method pauses a playing video clip.
		 * @return void
		 */
		void PauseL();

		/**
		 * This method stops a playing video clip.
 		 * @return void
		 */
		void Stop();

		/**
		 * This method sets the new video file to be played.
         * @param aFileName, file name
		 * @return void
		 */
		void SetNewFileL(const TDesC& aFileName);

		/**
		 * This method returns a document handler.
		 * @return document handler
		 */
	    CDocumentHandler& DocumentHandlerL();

        /**
         * This method initializes controller. Sets the Display Window,
         * area of the display to render the current video frame.
         * @param aCallback, UI controller callback
         * @param aWs, a session with the window server
         * @param aScreenDevice, the screen device
         * @param aWindow, the window to display
         * @param aWindowRect, the rectangle to display
         * @param aClipRect, the clip rectangle
         * @leaves Can leave with one of the system wide error codes
         * @return void
         */
        void InitControllerL( MPlayerUIControllerListener* aCallback,
                              RWsSession& aWs,
                              CWsScreenDevice& aScreenDevice,
                              RWindowBase& aWindow,
                              TRect& aScreenRect,
                              TRect& aClipRect);


    public: // Functions from MBeating
        /**
		 * See MBeating::Beat()
		 */
        void Beat();
        /**
		 * See MBeating::Synchronize()
		 */
        void Synchronize();

    public: // Functions from MVideoPlayerUtilityObserver
        /**
		 * See MVideoPlayerUtilityObserver::MvpuoOpenComplete(TInt aError).
		 */
        void MvpuoOpenComplete(TInt aError);

        /**
		 * See MVideoPlayerUtilityObserver::MvpuoPrepareComplete(TInt aError).
		 */
        void MvpuoPrepareComplete(TInt aError);

        /**
		 * See MVideoPlayerUtilityObserver::MvpuoFrameReady(CFbsBitmap& aFrame,
         * TInt aError).
		 */
        void MvpuoFrameReady(CFbsBitmap& aFrame,TInt aError);

        /**
		 * See MVideoPlayerUtilityObserver::MvpuoPlayComplete(TInt aError).
		 */
        void MvpuoPlayComplete(TInt aError);

        /**
		 * See MVideoPlayerUtilityObserver::MvpuoEvent(const TMMFEvent& aEvent).
		 */
        void MvpuoEvent(const TMMFEvent& aEvent);

	public:
 		/**
		 * This method gets the state of video player engine.
         * @return player state
		 */
		TPlayerState State() const { return iState; }

	private:
		// The state of video player engine
		TPlayerState iState;

		// Video player utility
		CVideoPlayerUtility*	iPlayer;
		HBufC*	iMediaFile;

		// The file details
		CVideoFileDetails* iFileDetails;

		// The UI listener for the video engine
		MPlayerUIControllerListener* iCtrlrListener;

		// Document handler
		CDocumentHandler* iDocHandler;

		// Update the time progress when video is playing
		CHeartbeat* iProgressUpdater;

		// The position of a playing video clip
		TInt64 iPlayPosition;
	};

#endif //__VIDEOPLAYERADAPTER_H__