linux_audiodrv.h

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//
// 1997/09/27 21:38:01
//

#ifndef AUDIODRV_H
#define AUDIODRV_H


#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#if defined(linux)
  #include <linux/soundcard.h>
#elif defined(__FreeBSD__)
  #include <machine/soundcard.h>
#endif

#include "mytypes.h"
#include "emucfg.h"

class audioDriver
{
        
 public:  // --------------------------------------------------------- public
  
        bool IsThere();
        
        bool Open(udword freq, int precision, int channels,
                          int fragments, int fragBase);
        
        void Close();
        
        void Play(ubyte* buffer, int bufferSize);

        bool Reset()
        {
                return (ioctl(audioHd,SNDCTL_DSP_RESET,0)!=(-1));
        }
        
        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:  // ------------------------------------------------------- private

    const char AUDIODEVICE[] = "/dev/dsp";
        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;
};


#endif  // AUDIODRV_H

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