toneplayerengine.cpp

《基于Symbian OS的手机开发与应用实践》这本书的配套源码。

/*
* ============================================================================
*  Name     : CTonePlayerEngine from TonePlayerEngine.cpp
*  Part of  : TonePlayer
*  Created  : 31.01.2006 by ToBeReplacedByAuthor
*  Implementation notes:
*  
*  Version  :
*  Copyright: ToBeReplacedByCopyright
* ============================================================================
*/

// INCLUDE FILES
#include "TonePlayerEngine.h"

// ================= MEMBER FUNCTIONS =======================

// Two-phased constructor.
CTonePlayerEngine* CTonePlayerEngine::NewL(MObserver& aObserver)
    {
    CTonePlayerEngine* self = new (ELeave) CTonePlayerEngine( aObserver );
    CleanupStack::PushL( self );
    self->ConstructL();
    CleanupStack::Pop();

    return self;
    }

// destructor
CTonePlayerEngine::~CTonePlayerEngine()
    {
    Stop();
    }

//
void CTonePlayerEngine::MatoPrepareComplete(TInt aError)
    {
    if (aError==KErrNone)
        {
        iTonePlayer->SetVolume(iTonePlayer->MaxVolume());
        iTonePlayer->Play();
        }
    else
        {
        Stop();
        iObserver.OnComplete(aError);
        }
    }

// 
void CTonePlayerEngine::MatoPlayComplete(TInt aError)
    {
    delete iTonePlayer;
    iTonePlayer = NULL;
    iObserver.OnComplete(aError);
    }

//
void CTonePlayerEngine::PlayL(TInt aFrequency)
    {
    Stop();
    iTonePlayer = CMdaAudioToneUtility::NewL(*this);
    iTonePlayer->PrepareToPlayTone(aFrequency, TTimeIntervalMicroSeconds(200000));
    }

//
void CTonePlayerEngine::Stop()
    {
    if (iTonePlayer)
        {
        iTonePlayer->CancelPlay();
        }
    delete iTonePlayer;
    iTonePlayer = NULL;
    }

// constructor
CTonePlayerEngine::CTonePlayerEngine(MObserver& aObserver)
: iObserver(aObserver)
    {
    }

// EPOC default constructor can leave.
void CTonePlayerEngine::ConstructL()
    {
    }

// End of File