toneadapater.cpp

一个简单的电子驱蚊器程序,通过调用频率发出声音.

// ToneAdapater.cpp: implementation of the CToneAdapater class.
//
//////////////////////////////////////////////////////////////////////

#include "ToneAdapater.h"
#include <aknnotewrappers.h> 

const TInt KToneFrequency = 7500;
const TInt KMinute = 600000000;
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CToneAdapater::CToneAdapater(MAudioToneAdapaterObserver& aObserver)
:iObserver(aObserver), 
 iState(EStopped)
	{
	}

CToneAdapater::~CToneAdapater()
{
	Stop();
}


CToneAdapater* CToneAdapater::NewL(MAudioToneAdapaterObserver& aObserver)
	{
	CToneAdapater* self = new (ELeave) CToneAdapater(aObserver);
	CleanupStack::PushL(self);
	self->ConstructL();
	CleanupStack::Pop(self);
	return self;
	}

void CToneAdapater::ConstructL( )
{

}

void CToneAdapater::MatoPrepareComplete(TInt aError)
{
	if (aError)
		{
		Stop();
		}
	else
		{
		iMdaAudioToneUtility->SetVolume( iMdaAudioToneUtility->MaxVolume() );
		iMdaAudioToneUtility->Play();
		}
}

void CToneAdapater::MatoPlayComplete(TInt /*aError*/)
{
	iState = EStopped;
	delete iMdaAudioToneUtility;
	iMdaAudioToneUtility = NULL;

	TRAPD(err, iObserver.HandlePlayingStoppedL());
}

void CToneAdapater::PlayToneL( TInt aB )
{
	iState = EPlaying;
	iMdaAudioToneUtility = CMdaAudioToneUtility::NewL( *this );
	iMdaAudioToneUtility->PrepareToPlayTone(KToneFrequency, TTimeIntervalMicroSeconds(KMinute*aB));	
	//iMdaAudioToneUtility->SetRepeats(aB,TTimeIntervalMicroSeconds(0));
}
	

void CToneAdapater::Stop()
{
	if (iMdaAudioToneUtility)
		{
		iMdaAudioToneUtility->CancelPlay();
		}
	delete iMdaAudioToneUtility;
	iMdaAudioToneUtility = NULL;
	iState = EStopped;
}