audiodrv_er6.h

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#ifndef AUDIODRV_ER6_H
#define AUDIODRV_ER6_H

#include <e32def.h>
#include <e32std.h>
#include <mdaaudiooutputstream.h>
#include <mda/common/audio.h>
#include "mytypes.h"
#include "emucfg.h"
#include <f32file.h>

const TInt KDefaultBufSize = 0x2000; 
//#define SAMPLE_FREQ 44100 ///< in Hertz
#define SAMPLE_FREQ 8000 
const TInt KVolumeSteps = 16; 


class audioDriver : public MMdaAudioOutputStreamCallback, public CBase
        {
public:
        audioDriver();
        void ConstructL();
        ~audioDriver();
        bool IsThere();
        bool Open(udword freq, int precision, int channels, int fragments, int fragBase);
        void Close();
        void Play(ubyte* buffer, int bufferSize);
        void StopStream();
        TInt VolumeDelta(TInt aDelta);

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

        // methods for dumping to WAV file
public:
        TInt StartWavDump(const TDesC& aSidTune);
        TInt StopWavDump();
        TBool IsWavDumping();
private:
        void DoWavDump(const TDesC8& aBuffer);

public:
        bool Reset() {return 0;}
        int GetAudioHandle(){return audioHd;}
        udword GetFrequency(){return frequency;}
        int GetChannels(){return channels;}
        int GetSamplePrecision(){return precision;}
        int GetSampleEncoding(){return encoding;}
        int GetBlockSize(){return blockSize;}
        int GetFragments(){return fragments;}
        int GetFragSizeBase(){return fragSizeBase;}
        const char* GetErrorString(){return errorString;}
private:
        void ResetStream();

private:  // ------------------------------------------------------- private
        int audioHd;
        const char* errorString;
        int blockSize;
        int fragments;
        int fragSizeBase;
        udword frequency;

        // These are constants/enums from ``libsidplay/include/emucfg.h''.
        int encoding;
        int precision;
        int channels;

        TInt iVolume;
        CMdaAudioOutputStream* iMdaAudio;    
        TMdaAudioDataSettings iSettings;     
        TBuf8<KDefaultBufSize*2> iExtraBuf;  
public:
        TBool iIsReady;                      
        TInt iBlocksInQueue;                 
        TBool iPrefilled;                    
private:
        RFs iFs;                             
        TFileName iWavDump;                  
        TBool iIsWavDumping;                 
        };


#endif  // AUDIODRV_ER6_H

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