audioplayerengine.cpp

基于Symbian OS的手机开发与应用实践第14章代码。主要讲多媒体的各种应用。

/*
* ============================================================================
*  Name     : CAudioPlayerEngine from AudioPlayerEngine.cpp
*  Part of  : AudioPlayer
*  Created  : 31.01.2006 by ToBeReplacedByAuthor
*  Implementation notes:
*  
*  Version  :
*  Copyright: ToBeReplacedByCopyright
* ============================================================================
*/

// INCLUDE FILES
#include "AudioPlayerEngine.h"

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

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

    return self;
    }

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

//
void CAudioPlayerEngine::MapcInitComplete(TInt aError, 
    const TTimeIntervalMicroSeconds& aDuration)
    {
    if (aError==KErrNone)
        {
        iAudioPlayer->SetVolume(iAudioPlayer->MaxVolume());
        iAudioPlayer->Play();
        }
    else
        {
        Stop();
        iObserver.OnComplete(aError);
        }
    }

// 
void CAudioPlayerEngine::MapcPlayComplete(TInt aError)
    {
    Stop();
    iObserver.OnComplete(aError);
    }

//
void CAudioPlayerEngine::PlayL(const TFileName& aFileName)
    {
    Stop();
    iAudioPlayer = CMdaAudioPlayerUtility::NewFilePlayerL(aFileName, *this);
    }

//
void CAudioPlayerEngine::Stop()
    {
    if (iAudioPlayer)
        {
        iAudioPlayer->Stop();
        }
    delete iAudioPlayer;
    iAudioPlayer = NULL;
    }

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

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

// End of File