soundhandler.h

Source code (C++) of the Icebloxx game for Symbian OS UIQ3.x

#ifndef SOUNDHANDLER
#define SOUNDHANDLER
#define KNumberOfChannels 4
#include <e32base.h>
#include <Mda\Common\Audio.h>
#include <mdaaudiooutputstream.h>
class CMdaAudioOutputStream;
/**
 * Class that stores an sample, loaded from a wav file
 */
class CSoundSample:public CBase
{
public:
	static CSoundSample* NewL(const TFileName& aFileName);
	~CSoundSample();
	CSoundSample();
	void ConstructL(const TFileName& aFileName);

	TInt iSampleLength;
	TInt iSampleRate;
	TInt16 iNoChannels;
	TInt16 iNoBits;
	TInt16 iStepRate;
	HBufC8* iSampleData;
	TPtr8 iSamplePtr;
};

/**
 * Class that defines a sound channel playing, and an associated sample
 */
class CSoundChannel:public CBase
{
public:
	CSoundChannel();
	~CSoundChannel();
	
	CSoundSample* iSample;
	TBool iIsPlaying;
	TTime iStartedPlayAt;
	TReal iPlayPosition;
	TBool iIsLooping;
	TReal iStepRate;


};
class CSoundHandler;

class CSoundThreadWatcher:public CActive
{
public:
	CSoundThreadWatcher(RThread* aSndThread,CSoundHandler* aSoundHandler);
	~CSoundThreadWatcher();
	void RunL();
	void DoCancel();
private:
	RThread* iSndThread;
	CSoundHandler* iSoundHandler;
};

class MSoundEventObserver
{
public:
	virtual void ChannelStopped(TInt aChannelIndex)=0;

};
class CSoundHandler:public CBase,public MMdaAudioOutputStreamCallback
{
public: 
	 static CSoundHandler* NewL(TInt aNoOfSoundChannels=4,TInt aMixFreq = 11025,TInt aChannels = 1,const TDesC& aDefaultMusicZip = KNullDesC());
	 ~CSoundHandler();
	 TInt AddSoundSampleL(const TFileName& aSampleName);

	/**
	 * @returns Channel Index
	 */
	 TInt PlaySampleL(TInt aSampleIndex,TReal aFactor = 1,TBool aIsLooping = EFalse);
	 void StopPlayingChannelL(TInt aChannelIndex);

	 void StopAll();
	 void StartSound();
	 void SuspendSound();
	 void SetObserver(MSoundEventObserver* aObserver);
	 TBool PlayingSample();
	 inline TBool SoundOn(){return iSoundOn;};
	 inline void SetSoundOn(TBool aBool){
		 if(aBool) 
			StartSound(); 
		else
		{
			SuspendSound();
		}
	};
	// Sets the volume 0-100 in %
	 void SetVolume(TInt aVolume);

	/**
	 * Returns volume in %
	 */
	 TInt Volume();
	
	void SoundThreadDiedL();
protected:
	void MixChannels();
	void InitThreadL();
	static TInt  ThreadStart(TAny* aSoundHandler);
private:
	CSoundHandler(TInt aNoOfSoundChannels,TInt aMixFreq,TInt aChannels);
	
	void ConstructL(const TDesC& aDefaultMusicZip = KNullDesC());
	void StartSoundL();
	virtual void MaoscOpenComplete(TInt aError) ;
	virtual void MaoscBufferCopied(TInt aError, const TDesC8& aBuffer) ;
	virtual void MaoscPlayComplete(TInt aError);
	void UpdateSoundL();

private:
	RPointerArray<CSoundChannel>* iSoundChannels;
	RPointerArray<CSoundSample>*  iSoundSamples;
	TInt iNoOfSoundChannels;
	HBufC8* iMixBuffer;
	TInt iSampleFreq;
	TInt iChannels;
	TInt iBufferLength;
	RThread* iSndThread;
	CActiveScheduler* iScheduler;
	CMdaAudioOutputStream* iAudioStream;
	TMdaAudioDataSettings iAudioSettings;
	CSoundSample* iMusicSample;
	RCriticalSection iThreadMutex;
	CSoundThreadWatcher* iThreadWatcher;
	TBool iSoundOn;
	TInt iVolume;
	TInt iNewVolume;

	TBool iSchedStarted;
	TInt64 iBytesWritten;
	TInt64 iChunkSize;
	MSoundEventObserver* iObserver;
public:
	TBool iExitSnd;
	TBool iReconfigureSound;	
	TBool iSoundInitOk;	
};
#endif