audioplayerengine.h

series60 应用程序开发的源代码 series60 应用程序开发的源代码

#ifndef __AUDIOPLAYERENGINE_H__
#define __AUDIOPLAYERENGINE_H__

#include <MdaAudioTonePlayer.h>
#include <MdaAudioSamplePlayer.h>
#include <MdaAudioOutputStream.h>
#include <mda\common\audio.h>


class MAudioPlayerEngineObserver
{
    public:
        virtual void HandlePlayingStoppedL() = 0;
};

// CLASS DECLARATION

/**
 *
 * @class    AudioPlayerEngine AudioPlayerEngine.h
 * @brief    The engine plays the following
 * ->    a tone
 * ->    a wav file
 * ->    a midi file
 * ->    a stream, continuously, until stopped
 *
 * Copyright (c) EMCC Software Ltd 2003
 * @version    1.0
 *
 */
class CAudioPlayerEngine :    public CBase,
                            public MMdaAudioToneObserver,
                            public MMdaAudioPlayerCallback,
                            public MMdaAudioOutputStreamCallback
{
    public:
        enum TState{ EStopped, EPlaying };

    public:
        static CAudioPlayerEngine* NewL(MAudioPlayerEngineObserver& aObserver);
        ~CAudioPlayerEngine();

    public:                // MMdaAudioToneObserver
        virtual void MatoPrepareComplete(TInt aError);
        virtual void MatoPlayComplete(TInt aError);

    public:                // MMdaAudioPlayerCallback
        virtual void MapcInitComplete(TInt aError, const TTimeIntervalMicroSeconds& aDuration);
        virtual void MapcPlayComplete(TInt aError);

    public:                // MMdaAudioOutputStreamCallback
        virtual void MaoscOpenComplete(TInt aError);
        virtual void MaoscBufferCopied(TInt aError, const TDesC8& aBuffer);
        virtual void MaoscPlayComplete(TInt aError);

    public:
        void PlayToneL();
        void PlayWavL();
        void PlayMidiL();
        void PlayStreamL();
        void Stop();

    public:
        inline const TState& State() const;

    private:
        CAudioPlayerEngine(MAudioPlayerEngineObserver& aObserver);
        void ConstructL();

    private:
        MAudioPlayerEngineObserver& iObserver;
        CMdaAudioPlayerUtility*        iPlayerFile;
        CMdaAudioToneUtility*        iPlayerTone;
        CMdaAudioOutputStream*        iPlayerStream;
        TMdaAudioDataSettings        iStreamSettings;
        TUint8*                        iStreamData;
        TPtr8*                        iStreamBuffer;

        TState            iState;
};

// inline functions
const CAudioPlayerEngine::TState& CAudioPlayerEngine::State() const    { return iState; }

#endif